阅读说明：本技术 高白度低豆腥味高温脱脂豆粕的生产装置及其制备方法 (Production device of high-whiteness low-beany-flavor high-temperature defatted soybean meal and preparation method thereof ) 是由 时玉强 万华松 时秀芹 陶涛 于 2021-03-05 设计创作，主要内容包括：本发明提出一种高白度低豆腥味高温脱脂豆粕的生产装置及其制备方法,属于大豆深加工技术领域,能够解决现有豆粕制品的生产方法存在豆腥味严重、豆粕品质低、豆粕在生产过程中易产生非酶褐变等的技术问题。该制备方法包括：(1)杂质筛分；(2)原料色选；(3)干燥；(4)破瓣与灭酶；(5)闪蒸脱气；(6)辊压与浸提；(7)真空脱溶,其中,蒸汽灭酶处理具体为豆瓣于盐酸蒸汽灭酶器中升温至96-150℃后,再于灭酶罐中处理28-45mi n。利用本发明提供的生产装置及其制备方法制得的豆粕具有低豆腥味等特点。本发明能够应用于高白度低豆腥味脱脂豆粕制备方面。(The invention provides a production device of high-temperature defatted soybean meal with high whiteness and low beany flavor and a preparation method thereof, belongs to the technical field of deep processing of soybeans, and can solve the technical problems of serious beany flavor, low quality of soybean meal, easy generation of non-enzymatic browning of the soybean meal in the production process and the like in the existing production method of soybean meal products. The preparation method comprises the following steps: (1) screening impurities; (2) selecting raw materials in color; (3) drying; (4) breaking the petals and inactivating enzyme; (5) flash evaporation and degassing; (6) rolling and leaching; (7) vacuum desolventizing, wherein the steam enzyme deactivation treatment is specifically that the bean is heated to 96-150 ℃ in a hydrochloric acid steam enzyme deactivation device, and then treated in an enzyme deactivation tank for 28-45 min. The soybean meal prepared by the production device and the preparation method thereof provided by the invention has the characteristics of low beany flavor and the like. The method can be applied to the preparation of the high-whiteness low-beany-flavor defatted soybean meal.)

1. The preparation method of the high-whiteness low-beany flavor high-temperature defatted soybean meal is characterized by comprising the following steps:

screening impurities: screening impurities of the soybean raw material;

selecting raw materials in color: carrying out color sorting treatment on the soybean raw material subjected to impurity screening treatment by using a color sorter so as to remove mildewed grains and obtain bean grains subjected to color sorting;

and (3) drying: drying the bean grains after color sorting, and adjusting the water content to 6-11% to obtain dried bean grains;

and (3) breaking petals and inactivating enzyme: carrying out a bean-breaking treatment on the dried bean particles by using a bean-breaking mill to obtain bean cotyledon and bean curd skin, and carrying out hydrochloric acid steam enzyme deactivation treatment on the bean cotyledon at the temperature of 96-150 ℃ for 28-45 min;

flash evaporation and degassing: carrying out flash evaporation degassing treatment on the bean cotyledon after enzyme deactivation by using a flash evaporation degassing device to remove beany flavor;

rolling and leaching: rolling the flash-evaporated and degassed bean cotyledon to obtain bean flakes, and sequentially performing organic solvent extraction and hot air drying on the bean flakes to obtain dried bean flakes;

vacuum desolventizing: and performing vacuum desolventizing treatment twice on the dried bean slices to obtain the high-whiteness low-beany-flavor high-temperature defatted bean pulp.

2. The method for preparing the high-temperature defatted soybean meal with high whiteness and low beany flavor according to claim 1, wherein in the step of petal breaking and enzyme inactivation, the gas phase of petal breaking is any one of nitrogen, carbon dioxide or argon, and in the step of flash evaporation and degassing, the vacuum degree of flash evaporation and degassing treatment is 60-70Kpa, and the temperature is 70-82 ℃.

3. The method for preparing the high-temperature defatted soybean meal with high whiteness and low beany flavor according to claim 1, wherein the hydrochloric acid steam enzyme deactivation treatment is specifically that after the temperature of the broad beans is raised to 96-150 ℃ in a hydrochloric acid steam enzyme deactivation device, the broad beans are treated in an enzyme deactivation tank for 28-45min, and the pH value of the used hydrochloric acid steam is 4.0-5.0;

the thickness of the bean chips is 0.3-0.5mm, the temperature of hot air drying treatment is 140-150 ℃, and the vacuum degree of the two vacuum desolventizing treatments is 6-7 Kpa.

4. A device for producing high-whiteness low-beany flavor high-temperature defatted soybean meal is characterized by comprising a screening and color separation device which are sequentially arranged and used for removing impurities and mildewed grains in a soybean raw material;

the drying tower is communicated with a discharge hole of the screening and color selecting device;

the valve breaking mill is communicated with a discharge hole of the drying tower through an air seal machine;

the cyclone separation device is communicated with the discharge port of the segment breaking mill;

the hydrochloric acid steam enzyme deactivation device is communicated with a discharge hole of the cyclone separation device;

the flash evaporation degassing device is communicated with a discharge hole of the hydrochloric acid steam enzyme deactivation device;

the rolling device is communicated with a discharge hole of the flash degassing device;

the leaching and drying device is communicated with a discharge port of the rolling device;

and the vacuum desolventizing device is communicated with a discharge hole of the leaching and drying device.

5. The device for producing the high-whiteness low-beany flavor high-temperature defatted soybean meal according to claim 4, characterized in that the screening and color separation device further comprises a gravity screen and a color separator, wherein a gravity screen feeding port and a gravity screen discharging port are respectively formed at two ends of the gravity screen, a color separator feeding port and a color separator discharging port are respectively formed at two ends of the color separator, the gravity screen feeding port is connected with the conveying device, and the gravity screen discharging port is communicated with the color separator feeding port;

drying tower feed inlet and drying tower discharge gate are seted up respectively to drying tower body both sides, and drying tower air outlet and drying tower air intake are seted up respectively at the top of the tower and the bottom of the tower, at drying tower air outlet installation draught fan, drying tower air intake installation heat exchanger, heat exchanger and air-blower intercommunication, drying tower feed inlet and look selection machine discharge gate intercommunication.

6. The device for producing the high-whiteness low-beany flavor high-temperature defatted soybean meal according to claim 4, wherein the two ends of the segment breaking mill are respectively provided with a segment breaking mill feeding port and a segment breaking mill discharging port, and the top of the segment breaking mill is provided with a segment breaking mill air inlet;

the cyclone separation device is a cyclone separator, one side of a cone of the cyclone separator is provided with an inlet of the cyclone separation device, and the top and the bottom of the cone are respectively provided with an air outlet of the cyclone separation device and a discharge outlet of the cyclone separation device.

7. The apparatus for producing high-whiteness low-beany flavor high-temperature defatted soybean meal according to claim 4, wherein a gas dehydration device is further arranged between the petal breaking mill and the cyclone separator, and the gas dehydration device further comprises a gas-liquid separator, a gas preparation device communicated with a gas outlet of the gas-liquid separator and a gas storage tank communicated with a gas outlet of the gas preparation device;

the gas-liquid separator is communicated with an air outlet of the cyclone separation device through an induced draft fan, the gas storage tank is communicated with an air inlet of the segment breaking mill through a gas conveying pipeline, and a check valve is installed on the gas conveying pipeline.

8. The apparatus for producing high-whiteness low-beany flavor high-temperature defatted soybean meal according to claim 4, wherein the hydrochloric acid steam enzyme deactivation apparatus further comprises a hydrochloric acid steam enzyme deactivation device and an enzyme deactivation tank;

a hydrochloric acid steam enzyme deactivation device feeding port and a hydrochloric acid steam enzyme deactivation device discharging port are formed in two ends of the hydrochloric acid steam enzyme deactivation device, a hydrochloric acid steam air inlet is formed in the top of the hydrochloric acid steam enzyme deactivation device, an enzyme deactivation tank feeding port and an enzyme deactivation tank discharging port are formed in the top and the bottom of an enzyme deactivation tank body respectively, the hydrochloric acid steam enzyme deactivation device feeding port is communicated with a cyclone separation device discharging port, and the hydrochloric acid steam enzyme deactivation device discharging port is communicated with the enzyme deactivation tank feeding port.

9. The apparatus for producing high-whiteness low-beany flavor high-temperature defatted soybean meal according to claim 8, wherein the apparatus for producing high-whiteness low-beany flavor high-temperature defatted soybean meal is further provided with a hydrochloric acid steam generating device communicated with the hydrochloric acid steam inlet;

the hydrochloric acid steam generating device further comprises a hydrochloric acid steam generator, a hydrochloric acid tank communicated with a liquid inlet on the left side of the hydrochloric acid steam generator and a dilute hydrochloric acid circulating tank communicated with a liquid inlet on the bottom of the hydrochloric acid steam generator.

10. The apparatus for producing high brightness and low beany flavor high temperature defatted soybean meal according to claim 9, wherein the flash degassing apparatus further comprises a flash degassing tank, a condenser, a vacuum pump and a circulation pump;

a flash degassing device feeding port and a flash degassing device discharging port which are communicated with an enzyme deactivation tank discharging port are respectively formed in the top and the bottom of the flash degassing tank body, a hydrochloric acid steam discharging port is formed in the left side of the tank body, a condenser liquid inlet and a condenser liquid outlet are respectively formed in the top and the bottom of the condenser, and a condensing dilute hydrochloric acid discharging port and a hydrochloric acid steam inlet communicated with the hydrochloric acid steam discharging port are respectively formed in the left side and the right side of the condenser;

the inlet of the vacuum pump is communicated with a condensed dilute hydrochloric acid discharge port, the outlet of the vacuum pump is communicated with a liquid inlet at the right side of the dilute hydrochloric acid circulating tank body, the inlet of the circulating pump is connected with a conveying pipeline between the hydrochloric acid steam generator and the dilute hydrochloric acid circulating tank, the outlet of the circulating pump is communicated with a liquid inlet of the condenser, and a liquid outlet of the condenser is communicated with a liquid inlet at the bottom of the dilute hydrochloric acid circulating;

the rolling device is a hydraulic rolling machine, and a hydraulic device feeding hole and a hydraulic device discharging hole are respectively formed in two ends of the hydraulic device;

the leaching and drying device further comprises a leaching device and a dryer, wherein a leaching device inlet and a leaching device outlet are respectively formed at two ends of the leaching device, a discharge port of the hydraulic device is communicated with the leaching device inlet, a dryer feed port and a dryer discharge port are respectively formed at two ends of a dryer cone, and the leaching device outlet is communicated with the dryer feed port;

the vacuum desolventizing device further comprises a first vacuum desolventizing device and a second vacuum desolventizing device, the first vacuum desolventizing device is communicated with a discharge hole of the dryer, and the first vacuum desolventizing device and the second vacuum desolventizing device are respectively connected with a first vacuum fan and a second vacuum fan.

Technical Field

The invention belongs to the technical field of deep processing of soybeans, and relates to a production device of soybean meal and a preparation method thereof, in particular to a production device of high-whiteness low-beany-flavor high-temperature defatted soybean meal and a preparation method thereof.

Background

With the continuous progress of the production and development technology of the isolated soy protein, the application field of the isolated soy protein is wider and wider, in particular to meat products, vegetarian and solid beverage products which take the isolated soy protein as a main ingredient. The excellent properties of the isolated soy protein provide dual guarantees of functionality and nutrition and health care for the development of the foods, and simultaneously provide higher requirements for indexes of various layers of the isolated soy protein, the raw material for preparing the isolated soy protein is soy, the soy has inherent flavor substances, the beany flavor becomes an important bottleneck for restricting the development of the isolated soy protein, meanwhile, the soy contains isoflavone, pigment and other substances, non-enzymatic browning is easily generated, and further, the color of the bean pulp becomes red and yellow, therefore, the development of the bean pulp with high whiteness and low beany flavor to promote the isolated soy protein products with high whiteness and low beany flavor has an important role in the development of the soy foods in China, but the existing preparation method of the bean pulp cannot completely solve the technical problem of beany flavor of the bean pulp products.

Therefore, how to prepare a high-whiteness low-beany flavor soybean meal product by optimizing the process and other measures is an important research topic for the technicians in the field.

Disclosure of Invention

The invention provides a production device of high-temperature defatted soybean meal with high whiteness and low beany flavor and a preparation method thereof, aiming at the technical problems of serious beany flavor, low quality of soybean meal, easy non-enzymatic browning of the soybean meal in the production process and the like in the existing production method of soybean meal products.

In order to achieve the purpose, the invention adopts the technical scheme that:

a preparation method of high-temperature defatted soybean meal with high whiteness and low beany flavor comprises the following steps:

screening impurities: screening impurities of the soybean raw material;

selecting raw materials in color: carrying out color sorting treatment on the soybean raw material subjected to impurity screening treatment by using a color sorter so as to remove mildewed grains and obtain bean grains subjected to color sorting;

and (3) drying: drying the bean grains after color sorting, and adjusting the water content to 6-11% to obtain dried bean grains;

and (3) breaking petals and inactivating enzyme: carrying out petal breaking treatment on the dried bean particles by using a petal breaking mill to obtain bean petals and bean hulls, and carrying out hydrochloric acid steam enzyme deactivation treatment on the bean petals at the temperature of 96-150 ℃ to obtain 28-45 min;

flash evaporation and degassing: carrying out flash evaporation degassing treatment on the bean cotyledon after enzyme deactivation by using a flash evaporation degassing device to remove beany flavor;

rolling and leaching: rolling the flash-evaporated and degassed bean cotyledon to obtain bean flakes, and sequentially performing organic solvent extraction and hot air drying on the bean flakes to obtain dried bean flakes;

vacuum desolventizing: and performing vacuum desolventizing treatment twice on the dried bean slices to obtain the high-whiteness low-beany-flavor high-temperature defatted bean pulp.

Preferably, in the step of valve breaking and enzyme deactivation, the gas phase of the valve breaking mill is any one of nitrogen, carbon dioxide or argon, and in the step of flash degassing, the vacuum degree of flash degassing treatment is 60-70Kpa, and the temperature is 70-82 ℃.

Preferably, the hydrochloric acid steam enzyme deactivation treatment is to heat bean cotyledon to 96-150 deg.C in hydrochloric acid steam enzyme deactivation device, and then treat 28-45min in enzyme deactivation tank, wherein the pH of the hydrochloric acid steam is 4.0-5.0;

the thickness of the bean chips is 0.3-0.5mm, the temperature of hot air drying treatment is 140-150 ℃, and the vacuum degree of the two vacuum desolventizing treatments is 6-7 Kpa.

The invention also provides a device for producing the high-whiteness low-beany flavor high-temperature defatted soybean meal, which comprises a screening and color sorting device which are sequentially arranged and used for removing impurities and mildewed grains in the soybean raw material;

the drying tower is communicated with a discharge hole of the screening and color selecting device;

the valve breaking mill is communicated with a discharge hole of the drying tower through an air seal machine;

the cyclone separation device is communicated with the discharge port of the segment breaking mill;

the hydrochloric acid steam enzyme deactivation device is communicated with a discharge hole of the cyclone separation device;

the flash evaporation degassing device is communicated with a discharge hole of the hydrochloric acid steam enzyme deactivation device;

the rolling device is communicated with a discharge hole of the flash degassing device;

the leaching and drying device is communicated with a discharge port of the rolling device;

and the vacuum desolventizing device is communicated with a discharge hole of the leaching and drying device.

Preferably, the screening and color selection device further comprises a specific gravity screen and a color selector, wherein a specific gravity screen feeding port and a specific gravity screen discharging port are respectively formed at two ends of the specific gravity screen, a color selector feeding port and a color selector discharging port are respectively formed at two ends of the color selector, the specific gravity screen feeding port is connected with the conveying device, and the specific gravity screen discharging port is communicated with the color selector feeding port;

drying tower feed inlet and drying tower discharge gate are seted up respectively to drying tower body both sides, and drying tower air outlet and drying tower air intake are seted up respectively at the top of the tower and the bottom of the tower, at drying tower air outlet installation draught fan, drying tower air intake installation heat exchanger, heat exchanger and air-blower intercommunication, drying tower feed inlet and look selection machine discharge gate intercommunication.

Preferably, a feeding port and a discharging port of the segment breaking mill are respectively arranged at two ends of the segment breaking mill, and an air inlet of the segment breaking mill is arranged at the top of the segment breaking mill;

the cyclone separation device is a cyclone separator, one side of a cone of the cyclone separator is provided with an inlet of the cyclone separation device, and the top and the bottom of the cone are respectively provided with an air outlet of the cyclone separation device and a discharge outlet of the cyclone separation device.

Preferably, a gas dehydration device is further arranged between the valve breaking mill and the cyclone separator, and the gas dehydration device further comprises a gas-liquid separator, a gas preparation device communicated with a gas outlet of the gas-liquid separator and a gas storage tank communicated with a gas outlet of the gas preparation device;

the gas-liquid separator is communicated with an air outlet of the cyclone separation device through an induced draft fan, the gas storage tank is communicated with an air inlet of the segment breaking mill through a gas conveying pipeline, and a check valve is installed on the gas conveying pipeline.

Preferably, the hydrochloric acid steam enzyme deactivation device further comprises a hydrochloric acid steam enzyme deactivation device and an enzyme deactivation tank;

a hydrochloric acid steam enzyme deactivation device feeding port and a hydrochloric acid steam enzyme deactivation device discharging port are formed in two ends of the hydrochloric acid steam enzyme deactivation device, a hydrochloric acid steam air inlet is formed in the top of the hydrochloric acid steam enzyme deactivation device, an enzyme deactivation tank feeding port and an enzyme deactivation tank discharging port are formed in the top and the bottom of an enzyme deactivation tank body respectively, the hydrochloric acid steam enzyme deactivation device feeding port is communicated with a cyclone separation device discharging port, and the hydrochloric acid steam enzyme deactivation device discharging port is communicated with the enzyme deactivation tank feeding port.

Preferably, the device for producing the high-whiteness low-beany flavor high-temperature defatted soybean meal is also provided with a hydrochloric acid steam generating device communicated with the hydrochloric acid steam inlet;

the hydrochloric acid steam generating device further comprises a hydrochloric acid steam generator, a hydrochloric acid tank communicated with a liquid inlet on the left side of the hydrochloric acid steam generator and a dilute hydrochloric acid circulating tank communicated with a liquid inlet on the bottom of the hydrochloric acid steam generator.

Preferably, the flash degassing device further comprises a flash degassing tank, a condenser, a vacuum pump and a circulating pump;

a flash degassing device feeding port and a flash degassing device discharging port which are communicated with an enzyme deactivation tank discharging port are respectively formed in the top and the bottom of the flash degassing tank body, a hydrochloric acid steam discharging port is formed in the left side of the tank body, a condenser liquid inlet and a condenser liquid outlet are respectively formed in the top and the bottom of the condenser, and a condensing dilute hydrochloric acid discharging port and a hydrochloric acid steam inlet communicated with the hydrochloric acid steam discharging port are respectively formed in the left side and the right side of the condenser;

the inlet of the vacuum pump is communicated with a condensed dilute hydrochloric acid discharge port, the outlet of the vacuum pump is communicated with a liquid inlet at the right side of the dilute hydrochloric acid circulating tank body, the inlet of the circulating pump is connected with a conveying pipeline between the hydrochloric acid steam generator and the dilute hydrochloric acid circulating tank, the outlet of the circulating pump is communicated with a liquid inlet of the condenser, and a liquid outlet of the condenser is communicated with a liquid inlet at the bottom of the dilute hydrochloric acid circulating;

the rolling device is a hydraulic rolling machine, and a hydraulic device feeding hole and a hydraulic device discharging hole are respectively formed in two ends of the hydraulic device;

the leaching and drying device further comprises a leaching device and a dryer, wherein a leaching device inlet and a leaching device outlet are respectively formed at two ends of the leaching device, a discharge port of the hydraulic device is communicated with the leaching device inlet, a dryer feed port and a dryer discharge port are respectively formed at two ends of a dryer cone, and the leaching device outlet is communicated with the dryer feed port;

the vacuum desolventizing device further comprises a first vacuum desolventizing device and a second vacuum desolventizing device, the first vacuum desolventizing device is communicated with a discharge hole of the dryer, and the first vacuum desolventizing device and the second vacuum desolventizing device are respectively connected with a first vacuum fan and a second vacuum fan.

Compared with the prior art, the invention has the advantages and positive effects that:

1. the invention provides a preparation method of high-temperature defatted soybean meal with high whiteness and low beany flavor, which comprises the following steps of sequentially carrying out impurity screening, raw material color selection, drying, petal breaking and enzyme deactivation, flash evaporation degassing, rolling and leaching, vacuum desolventizing and the like on soybean raw materials, and finally preparing the ideal high-whiteness low-beany flavor high-temperature defatted soybean meal;

2. the invention mainly improves the following steps in order to solve the problem of heavy beany flavor in the existing bean pulp preparation process: on one hand, the oxidation of lipoxidase in the soybeans is prevented by isolating oxygen by using inert gas in the process of splitting the segments, so that the generation of beany flavor substances in the production process of bean pulp is reduced; on the other hand, the soybean raw material is subjected to flash evaporation degassing treatment by using a flash evaporation degassing device, the boiling point of volatile organic matters is reduced by using vacuum, the volatile organic matters are removed, and the purpose of reducing the beany flavor of the soybean meal is achieved;

3. in order to prepare the ideal high-whiteness low-beany flavor high-temperature defatted soybean meal, hydrochloric acid steam with the pH value of 4.0-5.0 is used in the steps of steam enzyme deactivation and flash evaporation degassing, so that isoflavone can be hydrolyzed and destroyed, the yellow value is reduced, the isomerization and yellowing of the isoflavone are effectively inhibited, and meanwhile, the low-pH environment can inhibit the carboxyl-ammonia reaction and protect the soybean meal from non-enzymatic browning;

4. the invention also provides a set of complete device for producing the high-temperature defatted soybean meal with high whiteness and low beany flavor, which integrates impurity screening, color sorting, drying, petal breaking and enzyme deactivation, flash evaporation degassing, rolling and leaching and vacuum desolventizing devices, and has the advantages of simple and convenient assembly, high automation degree, low beany flavor of the soybean meal prepared by the device and excellent quality.

Drawings

Fig. 1 is a schematic structural diagram of an apparatus for producing high-whiteness low-beany-flavor high-temperature defatted soybean meal according to an embodiment of the present invention;

FIG. 2 is an enlarged view of a portion of a drying tower provided in accordance with an embodiment of the present invention;

FIG. 3 is a partial enlarged view of the valve-breaking mill, the gas dehydration device and the cyclone separator provided by the embodiment of the invention;

FIG. 4 is an enlarged view of a portion of a hydrochloric acid vapor generation apparatus and a flash degassing apparatus provided in an embodiment of the present invention.

In the above figures, 1 is a specific gravity sieve; 2. a color selector; 3. a drying tower; 4. grinding the broken petals; 5. a cyclone separator; 6. a gas dehydration unit; 7. a hydrochloric acid steam enzyme killer; 8. an enzyme deactivation tank; 9. a flash evaporation degassing tank; 11. a feed port of a gravity screen; 12. a specific gravity sieve discharge port; 13. a rolling device; 14. an extractor; 15. a dryer; 16. a first vacuum desolventizer; 17. a second vacuum desolventizer; 18. a hydrochloric acid steam generator; 19. a hydrochloric acid tank; 20. a dilute hydrochloric acid circulating tank; 21. a feed inlet of the color sorter; 22. a discharge hole of the color selector; 31. a feed inlet of the drying tower; 32. a discharge hole of the drying tower; 33. an air outlet of the drying tower; 34. an air inlet of the drying tower; 35. an induced draft fan; 36. a heat exchanger; 37. a blower; 41. a feed port is ground by a segment breaking mill; 42. a discharging port of the segment breaking mill; 43. a valve is broken and an air inlet is ground; 51. an inlet of a cyclone separation device; 52. an air outlet of the cyclone separation device; 53. a discharge port of the cyclone separation device; 61. a gas-liquid separator; 62. a gas preparation device; 63. a gas storage tank; 64. a check valve; 71. a feed inlet of a hydrochloric acid steam enzyme killer; 72. a discharge hole of the hydrochloric acid steam enzyme-killing device; 73. a hydrochloric acid steam inlet; 81. a feed inlet of the enzyme deactivation tank; 82. a discharge hole of the enzyme deactivation tank; 91. a condenser; 92. a vacuum pump; 93. a circulation pump; 94. a feed inlet of a flash degassing device; 95. a discharge port of the flash degassing device; 96. a hydrochloric acid vapor discharge port; 131. a feed port of the hydraulic device; 132. a discharge port of the hydraulic device; 141. an inlet of the extractor; 142. an outlet of the extractor; 151. a dryer feed inlet; 152. a discharge port of the dryer; 161. a first vacuum blower; 171. a second vacuum blower; 911. a liquid inlet of a condenser; 912. a condenser liquid outlet; 913. a condensed dilute hydrochloric acid discharge port; 914. and a hydrochloric acid steam inlet.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The embodiment of the invention provides a preparation method of high-whiteness low-beany-flavor high-temperature defatted soybean meal, which comprises the following steps:

s1, screening impurities: screening impurities of the soybean raw material;

s2, selecting raw materials in color: carrying out color sorting treatment on the soybean raw material subjected to impurity screening treatment by using a color sorter 2 to remove mildewed grains and obtain bean grains subjected to color sorting;

s3, drying: drying the bean grains after color sorting, and adjusting the water content to 6-11% to obtain dried bean grains;

s4, flap breaking and enzyme killing: carrying out petal breaking treatment on the dried bean particles by using a petal breaking mill 4 to obtain bean petals and bean curd skin, and carrying out hydrochloric acid steam enzyme deactivation treatment on the bean petals at the temperature of 96-150 ℃ to obtain 28-45 min;

s5, flash degassing: carrying out flash evaporation degassing treatment on the bean cotyledon after enzyme deactivation by using a flash evaporation degassing device to remove beany flavor;

s6, rolling and leaching: rolling the flash-evaporated and degassed bean cotyledon to obtain bean flakes, and sequentially performing organic solvent extraction and hot air drying on the bean flakes to obtain dried bean flakes;

s7, vacuum desolventizing: and performing vacuum desolventizing treatment twice on the dried bean slices to obtain the high-whiteness low-beany-flavor high-temperature defatted bean pulp.

In a preferred embodiment, in the flap breaking and enzyme inactivating step, the gas phase of the flap breaking mill 4 is any one of nitrogen, carbon dioxide or argon, and in the flash degassing step, the vacuum degree of the flash degassing treatment is 60-70Kpa, and the temperature is 70-82 ℃.

In a preferred embodiment, the hydrochloric acid steam enzyme deactivation treatment is specifically that after the temperature of the bean cotyledon is raised to 96-150 ℃ in a hydrochloric acid steam enzyme deactivation device 7, the bean cotyledon is treated in an enzyme deactivation tank 8 for 28-45min, and the pH value of the used hydrochloric acid steam is 4.0-5.0;

the thickness of the bean chips is 0.3-0.5mm, the temperature of hot air drying treatment is 140-150 ℃, and the vacuum degree of the two vacuum desolventizing treatments is 6-7 Kpa.

The invention also provides a device for producing the high-whiteness low-beany flavor high-temperature defatted soybean meal, which comprises a screening and color sorting device which are sequentially arranged and used for removing impurities and mildewed grains in the soybean raw material;

the drying tower 3 is communicated with a discharge hole of the screening and color selecting device;

the valve breaking mill 4 is communicated with a discharge hole 32 of the drying tower through an air seal machine;

the cyclone separation device is communicated with the valve breaking mill discharge port 42;

the hydrochloric acid steam enzyme deactivation device is communicated with a discharge hole 53 of the cyclone separation device;

the flash evaporation degassing device is communicated with a discharge hole of the hydrochloric acid steam enzyme deactivation device;

the rolling device 13 is communicated with a discharge port 95 of the flash degassing device;

the leaching and drying device is communicated with a discharge port 132 of the rolling device;

and the vacuum desolventizing device is communicated with a discharge hole of the leaching and drying device.

In a preferred embodiment, the screening and color selection device further comprises a gravity screen 1 and a color selector 2, wherein a gravity screen feeding hole 11 and a gravity screen discharging hole 12 are respectively formed at two ends of the gravity screen 1, a color selector feeding hole 21 and a color selector discharging hole 22 are respectively formed at two ends of the color selector 2, the gravity screen feeding hole 11 is connected with the conveying device, and the gravity screen discharging hole 12 is communicated with the color selector feeding hole 21;

3 tower body both sides of drying tower are seted up drying tower feed inlet 31 and drying tower discharge gate 32 respectively, and drying tower air outlet 33 and drying tower air intake 34 are seted up respectively at the top of the tower and the bottom of the tower, at drying tower air outlet 33 installation draught fan 35, and drying tower air intake 34 installation heat exchanger 36, heat exchanger 36 and air-blower 37 intercommunication, drying tower feed inlet 31 and look select quick-witted discharge gate 22 intercommunication.

In a preferred embodiment, both ends of the segment grinding mill 4 are respectively provided with a segment grinding feed port 41 and a segment grinding discharge port 42, and the top of the segment grinding mill 4 is provided with a segment grinding air inlet 43;

the cyclone separation device is a cyclone separator 5, one side of a cone of the cyclone separator 5 is provided with a cyclone separation device inlet 51, and the top and the bottom of the cone are respectively provided with a cyclone separation device air outlet 52 and a cyclone separation device discharge hole 53.

In a preferred embodiment, a gas dehydration device 6 is further arranged between the flap mill 4 and the cyclone separator 5, and the gas dehydration device 6 further comprises a gas-liquid separator 61, a gas preparation device 62 communicated with the gas outlet of the gas-liquid separator 61 and a gas storage tank 63 communicated with the gas outlet of the gas preparation device 62;

the gas-liquid separator 61 is communicated with the air outlet 52 of the cyclone separation device through the induced draft fan 35, the gas storage tank 63 is communicated with the valve breaking grinding air inlet 43 through a gas conveying pipeline, and the check valve 64 is arranged on the gas conveying pipeline.

In a preferred embodiment, the hydrochloric acid steam enzyme deactivation device further comprises a hydrochloric acid steam enzyme deactivation device 7 and an enzyme deactivation tank 8;

a hydrochloric acid steam enzyme deactivation device feed port 71 and a hydrochloric acid steam enzyme deactivation device discharge port 72 are formed in two ends of the hydrochloric acid steam enzyme deactivation device 7, a hydrochloric acid steam air inlet 73 is formed in the top of the hydrochloric acid steam enzyme deactivation device 7, an enzyme deactivation tank feed port 81 and an enzyme deactivation tank discharge port 82 are formed in the top and the bottom of the tank body of the enzyme deactivation tank 8 respectively, the hydrochloric acid steam enzyme deactivation device feed port 71 is communicated with a cyclone separation device discharge port 53, and the hydrochloric acid steam enzyme deactivation device discharge port 72 is communicated with the enzyme deactivation tank feed port 81.

In a preferred embodiment, the device for producing the high-whiteness low-beany flavor high-temperature defatted soybean meal is further provided with a hydrochloric acid steam generating device communicated with the hydrochloric acid steam inlet 73;

the hydrochloric acid steam generating device further comprises a hydrochloric acid steam generator 18, a hydrochloric acid tank 19 communicated with a liquid inlet at the left side of the hydrochloric acid steam generator 18 and a dilute hydrochloric acid circulating tank 20 communicated with a liquid inlet at the bottom of the hydrochloric acid steam generator 18.

In a preferred embodiment, the flash degassing apparatus further comprises a flash degassing tank 9, a condenser 91, a vacuum pump 92 and a circulation pump 93;

a flash degassing device feeding port 94 and a flash degassing device discharging port 95 which are communicated with the enzyme deactivation tank discharging port 82 are respectively arranged at the top and the bottom of the flash degassing tank 9, a hydrochloric acid steam discharging port 96 is arranged at the left side of the tank, a condenser liquid inlet 911 and a condenser liquid outlet 912 are respectively arranged at the top and the bottom of the condenser 91, and a condensed dilute hydrochloric acid discharging port 913 and a hydrochloric acid steam inlet 914 which is communicated with the hydrochloric acid steam discharging port 96 are respectively arranged at the left side and the right side;

the inlet of the vacuum pump 92 is communicated with a condensed dilute hydrochloric acid discharge port 913, the outlet of the vacuum pump 92 is communicated with a liquid inlet on the right side of the tank body of the dilute hydrochloric acid circulation tank 20, the inlet of the circulating pump 93 is connected with a conveying pipeline between the hydrochloric acid steam generator 18 and the dilute hydrochloric acid circulation tank 20, the outlet of the circulating pump 93 is communicated with a liquid inlet 911 of the condenser, and a liquid outlet 912 of the condenser is communicated with a liquid inlet at the bottom of the dilute hydrochloric acid;

the rolling device 13 is a hydraulic rolling machine, and both ends of the hydraulic device 13 are respectively provided with a hydraulic device feeding port 131 and a hydraulic device discharging port 132;

the leaching and drying device further comprises a leaching device 14 and a dryer 15, wherein two ends of the leaching device 14 are respectively provided with a leaching device inlet 141 and a leaching device outlet 142, a hydraulic device discharge port 132 is communicated with the leaching device inlet 141, two ends of a cone of the dryer 15 are respectively provided with a dryer feed port 151 and a dryer discharge port 152, and the leaching device outlet 142 is communicated with the dryer feed port 151;

the vacuum desolventizing device further comprises a first vacuum desolventizing device 16 and a second vacuum desolventizing device 17, the first vacuum desolventizing device 16 is communicated with a discharge hole 152 of the dryer, and the first vacuum desolventizing device 16 and the second vacuum desolventizing device 17 are respectively connected with a first vacuum fan 161 and a second vacuum fan 171.

In order to more clearly and specifically describe the apparatus for producing high-temperature defatted soybean meal with high whiteness and low beany flavor and the method for producing the same according to the embodiments of the present invention, the following embodiments are described below.

Comparative example 1

The comparative example provides a preparation process of conventional soybean meal, which specifically comprises the following steps:

(1) screening impurities such as cobblestone, legume weeds and the like in the soybean raw material in a specific gravity screen to obtain the screened soybean raw material;

(2) carrying out color sorting treatment on the soybean raw material subjected to impurity screening treatment by using a color sorter to remove mildewed grains and color-changed grains;

(3) the bean grains after color sorting enter a drying tower, hot air heated by a heat exchanger enters the drying tower through an air inlet of the drying tower by an air blower, the moisture of the soybeans is adjusted to be 8%, the dried air passes through an air duct outlet and is discharged from the drying tower by an induced draft fan, and the dried soybeans are discharged out of a system through the outlet of the drying tower and enter a petal breaking system;

(4) dry bean particles enter a broken bean system, bean cotyledons and bean skins after the bean cotyledons are broken grind an outlet from the broken bean system and then enter a cyclone separator through an inlet of the cyclone separator, the bean cotyledons enter a steam enzyme deactivation system through an air seal machine to perform steam enzyme deactivation treatment, and the specific treatment conditions are as follows: performing steam enzyme deactivation treatment on 30 min at 85 ℃;

(5) the bean cotyledon after enzyme deactivation enters a softening system and is softened at 82 ℃;

(6) the softened bean cotyledon enters a hydraulic roller press for rolling, and the thickness of the bean flakes is controlled to be 0.6 mm;

(7) feeding the pressed bean chips into a horizontal rotation type extractor, extracting by using an organic solvent to obtain mixed oil, recovering the mixed oil, feeding the mixed oil into a vegetable oil extraction system, feeding the degreased bean pulp into a medium steam heating device, heating at 160 ℃, and drying by hot air at 120 ℃;

(8) and (3) putting the dried soybean meal into a vacuum desolventizing device, performing vacuum desolventizing by using a vacuum fan, recovering the solvent, controlling the vacuum degree to be 5kpa, after the soybean meal is removed once, performing vacuum desolventizing by using the vacuum fan in the vacuum desolventizing device, recovering the solvent, and controlling the vacuum degree to be 5kpa to prepare the soybean meal product.

Example 1

The embodiment provides a method for producing bean pulp by using a high-whiteness low-beany flavor high-temperature degreasing bean pulp production device, which specifically comprises the following steps:

(1) screening impurities: the soybean raw material enters a specific gravity sieve 1 through a specific gravity sieve feeding port 11, impurities such as cobblestones, legume weeds and the like are sieved, and the sieved soybean raw material is discharged out of the specific gravity sieve 1 through a specific gravity sieve discharging port 12;

(2) selecting raw materials in color: the soybean raw material after the impurity screening treatment enters a color sorter 2 through a feed inlet 21 of the color sorter for color sorting treatment, mildewed grains are removed, and the soybean grains after the color sorting exit from the color sorter 2 through a discharge outlet 22 of the color sorter;

(3) and (3) drying: the bean granules after color sorting enter a drying tower 3 through a drying tower feeding hole 31, hot air heated by a heat exchanger 35 enters the drying tower 3 through a drying tower air inlet 34 through an air blower 36, the moisture of the soybean raw material is regulated to 11%, the air after drying treatment is discharged from a drying tower air outlet 33 through an induced draft fan 35, and the dried bean granules are discharged out of the drying tower 3 through a drying tower discharging hole 32;

(4) and (3) breaking petals and inactivating enzyme: dried bean particles enter a broken bean mill 4 through a broken bean mill feeding port 41, the gas phase of the broken bean mill 4 is nitrogen, the dried bean particles are broken in the broken bean mill 4 to obtain bean skin and bean cotyledon, the bean cotyledon is discharged from the broken bean mill 4 through a broken bean mill discharging port 42, and then enters a cyclone separator 5 through a cyclone separator inlet 51;

the nitrogen enters the valve breaking mill 4, then enters the cyclone separator 5 through the inlet 51 of the cyclone separation device, is discharged from the air outlet 52 of the cyclone separation device through the induced draft fan 35, and sequentially enters the gas-liquid separator 61 for dehydration treatment, the dehydrated nitrogen recovers the nitrogen through the gas preparation device 62, the recovered nitrogen enters the gas storage tank 63 for storage and recycling, and the nitrogen enters the valve breaking mill 4 through the check valve 64 during use;

bean petals enter a hydrochloric acid steam enzyme killing device 7 through a discharge hole 53 of a cyclone separation device, the temperature of the bean petals is quickly raised to 96 ℃ in the hydrochloric acid steam enzyme killing device 7, then 35 min is maintained in an enzyme killing tank 8, condensed water generated in the steam process is discharged by a steam trap connected to the steam enzyme killing device 7, hydrochloric acid steam used in the hydrochloric acid steam enzyme killing device 7 is prepared by food-grade hydrochloric acid stored in a hydrochloric acid tank 19 and hydrochloric acid in a dilute hydrochloric acid circulation tank 20 through a hydrochloric acid steam generator 18, and then the hydrochloric acid steam enters the hydrochloric acid steam enzyme killing device 7 through a hydrochloric acid steam inlet 73;

(5) flash evaporation and degassing: the bean cotyledon after enzyme deactivation enters a flash evaporation degassing tank 9 through a feed inlet 94 of a flash evaporation degassing device, the vacuum degree in the flash evaporation degassing tank 9 is controlled at 60Kpa by using a vacuum pump 92, the temperature is controlled at 82 ℃, the pH value of hydrochloric acid steam is 4.0, condensed dilute hydrochloric acid collected by the vacuum pump 92 from a condenser 91 enters a dilute hydrochloric acid circulating tank 20, and the dilute hydrochloric acid enters the condenser 91 through a circulating pump 93 and is matched with the vacuum pump 92 to complete flash evaporation degassing treatment;

(6) rolling and leaching: the bean paste after flash evaporation degassing treatment enters a hydraulic roller press for rolling, the thickness of the bean flakes is controlled to be 0.3mm, the bean flakes enter a flat-turn type extractor through an extractor inlet 141, are extracted by using an organic solvent and then enter a dryer 15 for drying treatment at the temperature of 140 ℃;

(7) vacuum desolventizing: and (3) putting the dried bean slices into a first vacuum desolventizer 16, performing vacuum desolventizing by using a first vacuum fan 161, controlling the vacuum degree to be 6Kpa, recovering the solvent, then putting the dried bean slices into a second vacuum desolventizer 17 for desolventizing again, controlling the vacuum degree to be 6Kpa, recovering the solvent, and performing desolventizing twice to obtain the high-whiteness low-beany flavor high-temperature defatted bean pulp.

Example 2

The embodiment provides a method for producing bean pulp by using a high-whiteness low-beany flavor high-temperature degreasing bean pulp production device, which specifically comprises the following steps:

(1) screening impurities: the soybean raw material enters a specific gravity sieve 1 through a specific gravity sieve feeding port 11, impurities such as cobblestones, legume weeds and the like are sieved, and the sieved soybean raw material is discharged out of the specific gravity sieve 1 through a specific gravity sieve discharging port 12;

(2) selecting raw materials in color: the soybean raw material after the impurity screening treatment enters a color sorter 2 through a feed inlet 21 of the color sorter for color sorting treatment, mildewed grains are removed, and the soybean grains after the color sorting exit from the color sorter 2 through a discharge outlet 22 of the color sorter;

(3) and (3) drying: the bean granules after color sorting enter a drying tower 3 through a drying tower feeding hole 31, hot air heated by a heat exchanger 35 enters the drying tower 3 through a drying tower air inlet 34 through an air blower 36, the moisture of the soybean raw material is regulated to 9%, the air after drying treatment is discharged from a drying tower air outlet 33 through an induced draft fan 35, and the dried bean granules are discharged out of the drying tower 3 through a drying tower discharging hole 32;

(4) and (3) breaking petals and inactivating enzyme: dried bean particles enter a broken bean mill 4 through a broken bean mill feeding port 41, the gas phase of the broken bean mill 4 is nitrogen, the dried bean particles are broken in the broken bean mill 4 to obtain bean skin and bean cotyledon, the bean cotyledon is discharged from the broken bean mill 4 through a broken bean mill discharging port 42, and then enters a cyclone separator 5 through a cyclone separator inlet 51;

the nitrogen enters the valve breaking mill 4, then enters the cyclone separator 5 through the inlet 51 of the cyclone separation device, is discharged from the air outlet 52 of the cyclone separation device through the induced draft fan 35, and sequentially enters the gas-liquid separator 61 for dehydration treatment, the dehydrated nitrogen recovers the nitrogen through the gas preparation device 62, the recovered nitrogen enters the gas storage tank 63 for storage and recycling, and the nitrogen enters the valve breaking mill 4 through the check valve 64 during use;

bean petals enter a hydrochloric acid steam enzyme killing device 7 through a discharge hole 53 of a cyclone separation device, the temperature of the bean petals is quickly raised to 150 ℃ in the hydrochloric acid steam enzyme killing device 7, then 28 min is maintained in an enzyme killing tank 8, condensed water generated in the steam process is discharged by a steam trap connected to the steam enzyme killing device 7, hydrochloric acid steam used in the hydrochloric acid steam enzyme killing device 7 is prepared by food-grade hydrochloric acid stored in a hydrochloric acid tank 19 and hydrochloric acid in a dilute hydrochloric acid circulation tank 20 through a hydrochloric acid steam generator 18, and then enters the hydrochloric acid steam enzyme killing device 7 through a hydrochloric acid steam inlet 73;

(5) flash evaporation and degassing: the bean cotyledon after enzyme deactivation enters a flash evaporation degassing tank 9 through a feed inlet 94 of a flash evaporation degassing device, the vacuum degree in the flash evaporation degassing tank 9 is controlled at 70Kpa by using a vacuum pump 92, the temperature is controlled at 70 ℃, the pH value of hydrochloric acid steam is 5.0, condensed dilute hydrochloric acid collected by the vacuum pump 92 from a condenser 91 enters a dilute hydrochloric acid circulating tank 20, and the dilute hydrochloric acid enters the condenser 91 through a circulating pump 93 and is matched with the vacuum pump 92 to complete flash evaporation degassing treatment;

(6) rolling and leaching: the bean paste after flash evaporation degassing treatment enters a hydraulic roller press for rolling, the thickness of the bean flakes is controlled to be 0.5mm, the bean flakes enter a flat-turn type extractor through an extractor inlet 141, are extracted by using an organic solvent and then enter a dryer 15 for drying treatment at the temperature of 145 ℃;

(7) vacuum desolventizing: and (3) putting the dried bean slices into a first vacuum desolventizer 16, performing vacuum desolventizing by using a first vacuum fan 161, controlling the vacuum degree to be 7Kpa, recovering the solvent, then putting the dried bean slices into a second vacuum desolventizer 17 for desolventizing again, controlling the vacuum degree to be 7Kpa, recovering the solvent, and performing desolventizing twice to obtain the high-whiteness low-beany flavor high-temperature defatted bean pulp.

Example 3

The embodiment provides a method for producing bean pulp by using a high-whiteness low-beany flavor high-temperature degreasing bean pulp production device, which specifically comprises the following steps:

(1) screening impurities: the soybean raw material enters a specific gravity sieve 1 through a specific gravity sieve feeding port 11, impurities such as cobblestones, legume weeds and the like are sieved, and the sieved soybean raw material is discharged out of the specific gravity sieve 1 through a specific gravity sieve discharging port 12;

(2) selecting raw materials in color: the soybean raw material after the impurity screening treatment enters a color sorter 2 through a feed inlet 21 of the color sorter for color sorting treatment, mildewed grains are removed, and the soybean grains after the color sorting exit from the color sorter 2 through a discharge outlet 22 of the color sorter;

(3) and (3) drying: the bean granules after color sorting enter a drying tower 3 through a drying tower feeding hole 31, hot air heated by a heat exchanger 35 enters the drying tower 3 through a drying tower air inlet 34 through an air blower 36, the moisture of the soybean raw material is regulated to 9%, the air after drying treatment is discharged from a drying tower air outlet 33 through an induced draft fan 35, and the dried bean granules are discharged out of the drying tower 3 through a drying tower discharging hole 32;

(4) and (3) breaking petals and inactivating enzyme: dried bean particles enter a broken bean mill 4 through a broken bean mill feeding port 41, the gas phase of the broken bean mill 4 is nitrogen, the dried bean particles are broken in the broken bean mill 4 to obtain bean skin and bean cotyledon, the bean cotyledon is discharged from the broken bean mill 4 through a broken bean mill discharging port 42, and then enters a cyclone separator 5 through a cyclone separator inlet 51;

the nitrogen enters the valve breaking mill 4, then enters the cyclone separator 5 through the inlet 51 of the cyclone separation device, is discharged from the air outlet 52 of the cyclone separation device through the induced draft fan 35, and sequentially enters the gas-liquid separator 61 for dehydration treatment, the dehydrated nitrogen recovers the nitrogen through the gas preparation device 62, the recovered nitrogen enters the gas storage tank 63 for storage and recycling, and the nitrogen enters the valve breaking mill 4 through the check valve 64 during use;

bean petals enter a hydrochloric acid steam enzyme killing device 7 through a discharge hole 53 of a cyclone separation device, the temperature of the bean petals is quickly raised to 140 ℃ in the hydrochloric acid steam enzyme killing device 7, then 45min is maintained in an enzyme killing tank 8, condensed water generated in the steam process is discharged by a steam trap connected to the steam enzyme killing device 7, hydrochloric acid steam used in the hydrochloric acid steam enzyme killing device 7 is prepared by food-grade hydrochloric acid stored in a hydrochloric acid tank 19 and hydrochloric acid in a dilute hydrochloric acid circulation tank 20 through a hydrochloric acid steam generator 18, and then enters the hydrochloric acid steam enzyme killing device 7 through a hydrochloric acid steam inlet 73;

(5) flash evaporation and degassing: the bean cotyledon after enzyme deactivation enters a flash evaporation degassing tank 9 through a feed inlet 94 of a flash evaporation degassing device, the vacuum degree in the flash evaporation degassing tank 9 is controlled to be 65Kpa by using a vacuum pump 92, the temperature is controlled to be 80 ℃, the pH value of hydrochloric acid steam is 4.5, condensed dilute hydrochloric acid collected by the vacuum pump 92 from a condenser 91 enters a dilute hydrochloric acid circulating tank 20, and the dilute hydrochloric acid enters the condenser 91 through a circulating pump 93 and is matched with the vacuum pump 92 to complete flash evaporation degassing treatment;

(6) rolling and leaching: the bean paste after flash evaporation degassing treatment enters a hydraulic roller press for rolling, the thickness of the bean flakes is controlled to be 0.4mm, the bean flakes enter a flat-turn type extractor through an extractor inlet 141, are extracted by using an organic solvent and then enter a dryer 15 for drying treatment at 148 ℃;

(7) vacuum desolventizing: and (3) putting the dried bean slices into a first vacuum desolventizer 16, performing vacuum desolventizing by using a first vacuum fan 161, controlling the vacuum degree to be 6Kpa, recovering the solvent, then putting the dried bean slices into a second vacuum desolventizer 17 for desolventizing again, controlling the vacuum degree to be 6Kpa, recovering the solvent, and performing desolventizing twice to obtain the high-whiteness low-beany flavor high-temperature defatted bean pulp.

Example 4

The embodiment provides a method for producing bean pulp by using a high-whiteness low-beany flavor high-temperature degreasing bean pulp production device, which specifically comprises the following steps:

(1) screening impurities: the soybean raw material enters a specific gravity sieve 1 through a specific gravity sieve feeding port 11, impurities such as cobblestones, legume weeds and the like are sieved, and the sieved soybean raw material is discharged out of the specific gravity sieve 1 through a specific gravity sieve discharging port 12;

(2) selecting raw materials in color: the soybean raw material after the impurity screening treatment enters a color sorter 2 through a feed inlet 21 of the color sorter for color sorting treatment, mildewed grains are removed, and the soybean grains after the color sorting exit from the color sorter 2 through a discharge outlet 22 of the color sorter;

(3) and (3) drying: the bean granules after color sorting enter a drying tower 3 through a drying tower feeding hole 31, hot air heated by a heat exchanger 35 enters the drying tower 3 through a drying tower air inlet 34 through an air blower 36, the moisture of the soybean raw material is regulated to be 6%, the air after drying treatment is discharged from a drying tower air outlet 33 through an induced draft fan 35, and the dried bean granules are discharged out of the drying tower 3 through a drying tower discharging hole 32;

(4) and (3) breaking petals and inactivating enzyme: dried bean particles enter a broken bean mill 4 through a broken bean mill feeding port 41, the gas phase of the broken bean mill 4 is nitrogen, the dried bean particles are broken in the broken bean mill 4 to obtain bean skin and bean cotyledon, the bean cotyledon is discharged from the broken bean mill 4 through a broken bean mill discharging port 42, and then enters a cyclone separator 5 through a cyclone separator inlet 51;

the nitrogen enters the valve breaking mill 4, then enters the cyclone separator 5 through the inlet 51 of the cyclone separation device, is discharged from the air outlet 52 of the cyclone separation device through the induced draft fan 35, and sequentially enters the gas-liquid separator 61 for dehydration treatment, the dehydrated nitrogen recovers the nitrogen through the gas preparation device 62, the recovered nitrogen enters the gas storage tank 63 for storage and recycling, and the nitrogen enters the valve breaking mill 4 through the check valve 64 during use;

bean petals enter a hydrochloric acid steam enzyme killing device 7 through a discharge hole 53 of a cyclone separation device, the temperature of the bean petals is quickly raised to 115 ℃ in the hydrochloric acid steam enzyme killing device 7, then 42 min is maintained in an enzyme killing tank 8, condensed water generated in the steam process is discharged by a steam trap connected to the steam enzyme killing device 7, hydrochloric acid steam used in the hydrochloric acid steam enzyme killing device 7 is prepared by food-grade hydrochloric acid stored in a hydrochloric acid tank 19 and hydrochloric acid in a dilute hydrochloric acid circulation tank 20 through a hydrochloric acid steam generator 18, and then the hydrochloric acid steam enters the hydrochloric acid steam enzyme killing device 7 through a hydrochloric acid steam inlet 73;

(5) flash evaporation and degassing: the bean cotyledon after enzyme deactivation enters a flash evaporation degassing tank 9 through a feed inlet 94 of a flash evaporation degassing device, the vacuum degree in the flash evaporation degassing tank 9 is controlled at 67Kpa by using a vacuum pump 92, the temperature is controlled at 72 ℃, the pH value of hydrochloric acid steam is 4.8, condensed dilute hydrochloric acid collected by the vacuum pump 92 from a condenser 91 enters a dilute hydrochloric acid circulating tank 20, and the dilute hydrochloric acid enters the condenser 91 through a circulating pump 93 and is matched with the vacuum pump 92 to complete flash evaporation degassing treatment;

(6) rolling and leaching: the bean paste after flash evaporation degassing treatment enters a hydraulic roller press for rolling, the thickness of the bean flakes is controlled to be 0.3mm, the bean flakes enter a flat-turn type extractor through an extractor inlet 141, are extracted by using an organic solvent and then enter a dryer 15 for drying treatment at 147 ℃;

(7) vacuum desolventizing: and (3) putting the dried bean slices into a first vacuum desolventizer 16, performing vacuum desolventizing by using a first vacuum fan 161, controlling the vacuum degree to be 7Kpa, recovering the solvent, then putting the dried bean slices into a second vacuum desolventizer 17 for desolventizing again, controlling the vacuum degree to be 6Kpa, recovering the solvent, and performing desolventizing twice to obtain the high-whiteness low-beany flavor high-temperature defatted bean pulp.

Example 5

The embodiment provides a method for producing bean pulp by using a high-whiteness low-beany flavor high-temperature degreasing bean pulp production device, which specifically comprises the following steps:

(1) screening impurities: the soybean raw material enters a specific gravity sieve 1 through a specific gravity sieve feeding port 11, impurities such as cobblestones, legume weeds and the like are sieved, and the sieved soybean raw material is discharged out of the specific gravity sieve 1 through a specific gravity sieve discharging port 12;

(2) selecting raw materials in color: the soybean raw material after the impurity screening treatment enters a color sorter 2 through a feed inlet 21 of the color sorter for color sorting treatment, mildewed grains are removed, and the soybean grains after the color sorting exit from the color sorter 2 through a discharge outlet 22 of the color sorter;

(3) and (3) drying: the bean granules after color sorting enter a drying tower 3 through a drying tower feeding hole 31, hot air heated by a heat exchanger 35 enters the drying tower 3 through a drying tower air inlet 34 through an air blower 36, the moisture of the soybean raw material is regulated to be 6%, the air after drying treatment is discharged from a drying tower air outlet 33 through an induced draft fan 35, and the dried bean granules are discharged out of the drying tower 3 through a drying tower discharging hole 32;

(4) and (3) breaking petals and inactivating enzyme: dried bean particles enter a broken bean mill 4 through a broken bean mill feeding port 41, the gas phase of the broken bean mill 4 is nitrogen, the dried bean particles are broken in the broken bean mill 4 to obtain bean skin and bean cotyledon, the bean cotyledon is discharged from the broken bean mill 4 through a broken bean mill discharging port 42, and then enters a cyclone separator 5 through a cyclone separator inlet 51;

the nitrogen enters the valve breaking mill 4, then enters the cyclone separator 5 through the inlet 51 of the cyclone separation device, is discharged from the air outlet 52 of the cyclone separation device through the induced draft fan 35, and sequentially enters the gas-liquid separator 61 for dehydration treatment, the dehydrated nitrogen recovers the nitrogen through the gas preparation device 62, the recovered nitrogen enters the gas storage tank 63 for storage and recycling, and the nitrogen enters the valve breaking mill 4 through the check valve 64 during use;

bean petals enter a hydrochloric acid steam enzyme killing device 7 through a discharge hole 53 of a cyclone separation device, the temperature of the bean petals is quickly raised to 100 ℃ in the hydrochloric acid steam enzyme killing device 7, then 35 min is maintained in an enzyme killing tank 8, condensed water generated in the steam process is discharged by a steam trap connected to the steam enzyme killing device 7, hydrochloric acid steam used in the hydrochloric acid steam enzyme killing device 7 is prepared by food-grade hydrochloric acid stored in a hydrochloric acid tank 19 and hydrochloric acid in a dilute hydrochloric acid circulation tank 20 through a hydrochloric acid steam generator 18, and then the hydrochloric acid steam enters the hydrochloric acid steam enzyme killing device 7 through a hydrochloric acid steam inlet 73;

(5) flash evaporation and degassing: the bean cotyledon after enzyme deactivation enters a flash evaporation degassing tank 9 through a feed inlet 94 of a flash evaporation degassing device, the vacuum degree in the flash evaporation degassing tank 9 is controlled at 70Kpa by using a vacuum pump 92, the temperature is controlled at 82 ℃, the pH value of hydrochloric acid steam is 4.3, condensed dilute hydrochloric acid collected by the vacuum pump 92 from a condenser 91 enters a dilute hydrochloric acid circulating tank 20, and the dilute hydrochloric acid enters the condenser 91 through a circulating pump 93 and is matched with the vacuum pump 92 to complete flash evaporation degassing treatment;

(6) rolling and leaching: the bean paste after flash evaporation degassing treatment enters a hydraulic roller press for rolling, the thickness of the bean flakes is controlled to be 0.5mm, the bean flakes enter a flat-turn type extractor through an extractor inlet 141, are extracted by using an organic solvent and then enter a dryer 15 for drying treatment at the temperature of 144 ℃;

(7) vacuum desolventizing: and (3) putting the dried bean slices into a first vacuum desolventizer 16, performing vacuum desolventizing by using a first vacuum fan 161, controlling the vacuum degree to be 7Kpa, recovering the solvent, then putting the dried bean slices into a second vacuum desolventizer 17 for desolventizing again, controlling the vacuum degree to be 6Kpa, recovering the solvent, and performing desolventizing twice to obtain the high-whiteness low-beany flavor high-temperature defatted bean pulp.

Evaluation of quality of high-whiteness high-temperature soybean meal

The invention also evaluates the nitrogen solubility index, appearance color and beany flavor of the soybean meal products prepared in the above examples and comparative examples, and the test results are shown in the following table:

table 1 evaluation results of soybean meal quality in examples and comparative examples

	Urease activity	Apparent color	Evaluation of beany flavor
				Example 1	Negative of	White, yellow and red	Low beany flavor
Example 2	Negative of	White, yellow and red	Low beany flavor
				Example 3	Negative of	White, yellow and red	Low beany flavor
Example 4	Negative of	White, yellow and red	Low beany flavor
				Example 5	Negative of	White, yellow and red	Low beany flavor
Comparative example 1	Strong positive	High yellow and red values	Heavy beany flavor

As can be seen from the data in the above table, the high-whiteness high-temperature soybean meal prepared by the conventional preparation method provided in comparative example 1 still has the problem of heavy beany flavor and urease is strongly positive, while the soybean meal prepared by the production device of the high-whiteness low-beany flavor high-temperature defatted soybean meal and the preparation method thereof provided in the embodiments of the present invention has white appearance color, low beany flavor and urease is negative. Therefore, the production device and the preparation method thereof provided by the invention can thoroughly solve the problems of serious beany flavor, low bean pulp quality, easy non-enzymatic browning of the bean pulp in the production process and the like of the existing production method of the bean pulp product, and have wide application prospect in the field of deep processing of soybeans.