阅读说明：本技术 膳食纤维的生产方法 (Production method of dietary fiber ) 是由 张楠 于 2019-11-04 设计创作，主要内容包括：本发明公开了一种膳食纤维的生产方法,包括：将称重后的原料和药剂进行混合、高温高压蒸煮、第一次过滤、第一次清洗、漂白、第二次过滤、第二次清洗,其特征在于,将称重后的原料和药剂进行混合、高温高压蒸煮、第一次过滤、第一次清洗、漂白、第二次过滤、第二次清洗操作均维持同一操作环境；本发明具体步骤明了,采用的装置操作简单,能够将多种操作,包括反应和后处理在同一容器内完成,使得各阶段的操作工序由于是在同一个环境下完成而不会对产品质量产生不良影响,此外通过该装置进行漂白和清洗操作的耗水量也大大减少,使用设备的数量也进行了进一步精简,节约了工业成本,操作通过控制系统可以完成,能够实现自动化生产也节约了人力成本。(The invention discloses a production method of dietary fiber, which comprises the following steps: mixing the weighed raw materials and the medicament, high-temperature high-pressure cooking, first filtering, first cleaning, bleaching, second filtering and second cleaning, and is characterized in that the same operation environment is maintained in the operations of mixing the weighed raw materials and the medicament, high-temperature high-pressure cooking, first filtering, first cleaning, bleaching, second filtering and second cleaning; the method has the advantages that the specific steps are clear, the adopted device is simple to operate, various operations including reaction and post-treatment can be completed in the same container, the operation processes in all stages are completed in the same environment, adverse effects on product quality are avoided, water consumption for bleaching and cleaning operations through the device is greatly reduced, the number of used equipment is further reduced, industrial cost is saved, the operation can be completed through a control system, and automatic production and labor cost are saved.)

1. A method for producing dietary fiber comprising: mixing the weighed raw materials and the medicament, high-temperature high-pressure cooking, first filtering, first cleaning, bleaching, second filtering and second cleaning, and is characterized in that the same operation environment is maintained in the operations of mixing the weighed raw materials and the medicament, high-temperature high-pressure cooking, first filtering, first cleaning, bleaching, second filtering and second cleaning.

2. A method for producing dietary fiber according to claim 1, wherein the above operations are all performed in an integrated dietary fiber production apparatus comprising:

the rotary spherical digester is a hollow sphere and is erected between the pair of vertical bases;

a material feeding port is arranged on the upper spherical surface of the rotary spherical digester; a circular plate-shaped filter assembly is horizontally and fixedly arranged in the rotary spherical digester, and the edge of the circular plate-shaped filter assembly is fixedly connected with the inner wall of the rotary spherical digester; the filtering component divides the space in the steaming ball into a material processing chamber with a material feeding port and a liquid collecting chamber;

one end of a steam pipe is connected with a high-temperature steam pipeline outside the spherical digester, and the other end of the steam pipe extends into the material processing chamber of the spherical digester; one end of a liquid discharge pipe is connected with the external pipeline of the spherical digester, and the other end of the liquid discharge pipe extends into the bottom of the liquid collection chamber; one end of a liquid inlet pipe is connected with a cleaning water pipeline outside the rotary spherical digester, the other end of the liquid inlet pipe extends into the treatment chamber of the rotary spherical digester, one end of an exhaust pipe is connected with the pipeline outside the rotary spherical digester, and the other end of the exhaust pipe extends into the material treatment chamber;

and sealing valves are arranged on the steam pipe, the liquid discharge pipe, the liquid inlet pipe and the exhaust pipe.

3. A process for producing dietary fiber as defined in claim 2, wherein said rotary spherical digester has a pair of axial holes symmetrical with respect to the center of the rotary spherical digester; the two shaft holes are respectively connected with a left rotating shaft and a right rotating shaft which are coaxial; the right rotating shaft is provided with a coaxial transmission assembly; the left rotating shaft and the right rotating shaft are connected with the corresponding vertical base through bearing seats, so that the rotary spherical digester rotates;

the material feeding port is positioned at the highest point of the rotary spherical digester, and the left rotating shaft and the right rotating shaft are both of hollow shaft structures and are both provided with rotary joints;

the exhaust pipe is coaxially sleeved with the liquid inlet pipe, penetrates through the right rotating shaft through a corresponding rotating joint and extends into the steaming ball; the liquid discharge pipe is coaxially sleeved with the steam pipe, penetrates through the left rotating shaft through a corresponding rotating joint and extends into the steam ball;

the steam pipe, the liquid discharge pipe, the liquid running pipe and the part of the exhaust pipe extending into the spherical digester all rotate simultaneously with the spherical digester.

4. A method for producing dietary fiber as defined in any one of claims 2 to 3, wherein a manual valve is provided on the rotary spherical digester, the manual valve and the feeding port are arranged in central symmetry with respect to the center of the rotary spherical digester, and the manual valve is located at the lowest position of the liquid collection chamber.

5. A process for producing dietary fibers as defined in any one of claims 2 to 3, wherein an auxiliary addition valve is provided on said rotary spherical digester at a position adjacent to said feed port.

6. A process for the production of dietary fiber as defined in any one of claims 2 to 3, wherein said filter assembly comprises an upper press plate, a filter cloth and a lower sieve plate, said upper press plate, filter cloth and lower sieve plate being stacked.

7. A process for the production of dietary fibre as claimed in any one of claims 2 to 3, wherein the filter element is connected to the inner wall of the rotary spherical digester by a plurality of grate support plates which are perpendicular to the filter element and located within the liquid collection chamber.

8. A method for producing dietary fiber as defined in claim 3, wherein a left reinforcing plate is coaxially sleeved on each of said left rotating shafts, a right reinforcing plate is coaxially sleeved on each of said right rotating shafts, and said left reinforcing plate and said right reinforcing plate are both bowl-shaped and closely attached to the outer wall of said rotary spherical digester; a plurality of reinforcing plates are arranged on the left reinforcing plate by taking a central shaft of the left reinforcing plate as an axis, and the reinforcing plates are vertical to the left reinforcing plate and are fixedly connected with the left rotating shaft; the right reinforcing plate is provided with a plurality of reinforcing plates by taking the central shaft of the right reinforcing plate as an axis, and the reinforcing plates are perpendicular to the right reinforcing plate and are fixedly connected with the right rotating shaft.

9. A method for producing dietary fiber as defined in any one of claims 2 to 3, wherein the portion of the liquid inlet pipe extending into the steaming ball is curved and attached to the inner wall of the steaming ball, the curved direction of the liquid inlet pipe faces the feeding port, the end of the liquid inlet pipe is closed, a plurality of liquid spraying holes are formed in the pipe wall, and the liquid spraying direction of the liquid spraying holes faces the filter assembly.

10. A process for producing dietary fiber as defined in any one of claims 2 to 3, wherein the steam pipe, the liquid discharge pipe, the liquid inlet pipe and the gas discharge pipe are controlled to be opened and closed by a PLC control system.

Technical Field

The invention relates to the technical field of dietary fiber production. More particularly, the present invention relates to a process for producing dietary fiber.

Background

The raw materials for producing dietary fiber are very rich and various, but basically, the processes of cooking, filtering, bleaching, cleaning and the like are carried out, lignin in the raw materials is removed, the filtered fiber is subjected to the processes of bleaching, cleaning and the like to obtain useful fiber, and then the processes of subsequent processing, packaging and the like are carried out.

After the raw materials are cooked by the reaction kettle, black liquor (alkali liquor) containing fibers is discharged into a filter tank for filtering during filtering, and lignin in the black liquor is easy to undergo condensation reaction due to the reduction of temperature, so that the viscosity of the black liquor is increased, and the extraction of the black liquor is not facilitated; the condensation reaction of lignin in the plant fiber also increases the difficulty for the bleaching operation, and the procedures of bleaching, cleaning and the like in the prior art are carried out in part, so that the production process is complex, the investment is large, the power consumption is large, and the equipment operation cost is high; the extraction rate of the black liquor is low, the concentration of the black liquor is low, the water consumption is large, the production efficiency is low, and the labor cost is high.

Disclosure of Invention

An object of the present invention is to solve at least the above problems and to provide a method for producing dietary fiber, which has clear steps, is simple in operation of the apparatus used, and can perform various operations including reaction and post-treatment in the same container, so that the operation processes of each stage are performed in the same environment without adverse effect on the product quality, and further, the water consumption for bleaching and cleaning operations by the apparatus is greatly reduced, the number of used devices is further reduced, the industrial cost is saved, the operation can be performed by a control system, and the automatic production and the labor cost are saved.

To achieve these objects and other advantages in accordance with the present invention, there is provided a method for producing dietary fiber, comprising:

mixing the weighed raw materials and the medicament, high-temperature high-pressure cooking, first filtering, first cleaning, bleaching, second filtering and second cleaning, wherein the same operation environment is maintained in the operations of mixing the weighed raw materials and the medicament, high-temperature high-pressure cooking, first filtering, first cleaning, bleaching, second filtering and second cleaning.

Preferably, the above operations are all performed in an integrated dietary fiber production apparatus, comprising:

the rotary spherical digester is a hollow sphere and is erected between the pair of vertical bases;

a material feeding port is arranged at the highest point of the rotary spherical digester; a circular plate-shaped filter assembly is horizontally and fixedly arranged in the rotary spherical digester, and the edge of the circular plate-shaped filter assembly is fixedly connected with the inner wall of the rotary spherical digester; the filtering component divides the space in the steaming ball into a material processing chamber with a material feeding port and a liquid collecting chamber;

one end of a steam pipe is connected with a high-temperature steam pipeline outside the spherical digester, and the other end of the steam pipe extends into the material processing chamber of the spherical digester; one end of a liquid discharge pipe is connected with the external pipeline of the rotary spherical digester, and the other end of the liquid discharge pipe extends into the bottom of the liquid collection chamber; one end of a liquid inlet pipe is connected with a cleaning water pipeline outside the rotary spherical digester, the other end of the liquid inlet pipe extends into the treatment chamber of the rotary spherical digester, one end of an exhaust pipe is connected with the pipeline outside the rotary spherical digester, and the other end of the exhaust pipe extends into the material treatment chamber;

and sealing valves are arranged on the steam pipe, the liquid discharge pipe, the liquid inlet pipe and the exhaust pipe.

Preferably, the rotary spherical digester is provided with a pair of shaft holes which are symmetrical relative to the spherical center of the rotary spherical digester; the two shaft holes are respectively connected with a left rotating shaft and a right rotating shaft which are coaxial; the right rotating shaft is provided with a coaxial transmission assembly; the left rotating shaft and the right rotating shaft are connected with the corresponding vertical base through bearing seats, so that the rotary spherical digester rotates;

the left rotating shaft and the right rotating shaft are both of hollow shaft structures, and are provided with rotary joints;

the exhaust pipe is coaxially sleeved with the liquid inlet pipe, penetrates through the right rotating shaft through a corresponding rotating joint and extends into the steaming ball; the liquid discharge pipe is coaxially sleeved with the steam pipe, penetrates through the left rotating shaft through a corresponding rotating joint and extends into the steam ball;

the steam pipe, the liquid discharge pipe, the liquid running pipe and the part of the exhaust pipe extending into the spherical digester all rotate simultaneously with the spherical digester.

Preferably, a manual valve is arranged on the rotary spherical digester, the manual valve and the feeding port are arranged in central symmetry with the center of the rotary spherical digester, and the manual valve is located at the lowest position of the liquid collecting chamber.

Preferably, an auxiliary agent adding valve is arranged on the position, close to the material feeding port, of the rotary spherical digester.

Preferably, the filtering component comprises an upper pressing plate, filtering cloth and a lower sieve plate, wherein the upper pressing plate, the filtering cloth and the lower sieve plate are stacked.

Preferably, the filter assembly is connected with the inner wall of the rotary spherical digester through a plurality of grid support plates, and the grid support plates are perpendicular to the filter assembly and are positioned in the liquid collecting chamber.

Preferably, the left rotating shaft is coaxially sleeved with a left reinforcing plate, the right rotating shaft is coaxially sleeved with a right reinforcing plate, and the left reinforcing plate and the right reinforcing plate are both bowl-shaped and are tightly attached to the outer wall of the rotary spherical digester; a plurality of reinforcing plates are arranged on the left reinforcing plate by taking a central shaft of the left reinforcing plate as an axis, and the reinforcing plates are vertical to the left reinforcing plate and are fixedly connected with the left rotating shaft; the right reinforcing plate is provided with a plurality of reinforcing plates by taking the central shaft of the right reinforcing plate as an axis, and the reinforcing plates are perpendicular to the right reinforcing plate and are fixedly connected with the right rotating shaft.

Preferably, the liquid inlet pipe extends into the part inside the steaming ball, is bent and attached to the inner wall of the steaming ball, the bending direction of the liquid inlet pipe faces the material outlet, the port of the liquid inlet pipe is closed, a plurality of liquid spraying holes are formed in the pipe wall, and the liquid spraying direction of the liquid spraying holes faces the filtering component.

Preferably, the steam pipe, the liquid discharge pipe, the liquid inlet pipe and the sealing valves on the exhaust pipe are controlled to be closed and opened through a PLC control system.

The invention at least comprises the following beneficial effects:

this device utilizes the characteristics of cooking of rotary spherical digester equipment, accomplishes cooking, filtration, bleaching, abluent process to raw and other materials in the rotary spherical digester, and the characteristics are:

1) after the cooking process is finished, the black liquor and the fibers are separated by the filter cloth by utilizing the internal pressure of the spherical digester, and then the black liquor is discharged out of the sphere, if the subsequent pressure is insufficient, high-pressure gas or high-temperature high-pressure steam can be added to pressurize the interior of the sphere, so that the black liquor is discharged to the maximum extent, the extraction rate of the black liquor is improved, and the black liquor can be collected in a centralized manner by connecting a liquor discharge port of a liquor discharge pipe outside the sphere with a pipeline;

2) when the fiber containing black liquor is cleaned, the rotary spherical digester is rotated to achieve the purpose of stirring, so that the cleaning process can be quickly completed, and the water quantity is saved;

3) the filter assembly is horizontally arranged in the rotary spherical digester, so that the thickness of a fiber layer formed by materials is uniform when the fibers are washed after being bleached in the spherical digester, clear water enters the liquid collecting chamber through the fiber layer from top to bottom through the filter cloth to complete the washing of the fibers, and then is discharged through the liquid discharge pipe, the fibers at each position are thoroughly washed, and the amount of the clear water is saved.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.

Drawings

FIG. 1 is a structural diagram of an apparatus for producing dietary fiber by boiling, filtering, bleaching and cleaning in a ball according to one embodiment of the present invention;

FIG. 2 is a cross-sectional view of an apparatus for producing dietary fiber by boiling, filtering, bleaching and cleaning in a ball according to one embodiment of the present invention;

FIG. 3 is a partial enlarged view of a filter assembly B according to one embodiment of the present invention;

fig. 4 is a partial enlarged view of the screen plate C according to one embodiment of the present invention;

fig. 5 is a partial enlarged view of the platen D according to one embodiment of the present invention.

Detailed Description

The present invention is further described in detail below with reference to examples so that those skilled in the art can practice the invention with reference to the description.

< example 1>

A method for producing dietary fiber, comprising: mixing the weighed raw oat hulls and the medicament, and sequentially carrying out high-temperature and high-pressure cooking, primary filtering, primary cleaning, bleaching, secondary filtering and secondary cleaning to obtain a coarse oat dietary fiber product;

mixing the weighed raw materials and the medicament, steaming at high temperature and high pressure, filtering for the first time, cleaning for the first time, bleaching, filtering for the second time, and cleaning for the second time, wherein the same operation environment is maintained;

the method specifically comprises the following steps: the device used for filtering is preheated, so that the temperature difference between the device used for filtering and the mixture subjected to high-temperature and high-pressure cooking is not large, and the phenomenon that lignin undergoes condensation reaction due to sudden temperature drop of the mixture after reaction during filtering, so that the viscosity of black liquor is increased, is prevented.

< example 2>

A method for producing dietary fiber, comprising:

mixing the weighed raw wheat bran and the medicament, sequentially carrying out high-temperature high-pressure cooking, first filtering, first cleaning, bleaching, second filtering and second cleaning to obtain a wheat dietary fiber crude product, wherein the operations are all completed in the integrated dietary fiber production device, and the integrated dietary fiber production device comprises:

the rotary spherical digester 12 is a hollow sphere and is erected between the pair of vertical bases to ensure the stability of the rotary spherical digester 12;

a material feeding port 13 is formed in the upper semicircular spherical surface of the rotary spherical digester 12 for feeding and discharging, and a sealing valve is further arranged on the material feeding port 13; a circular plate-shaped filter assembly is horizontally and fixedly arranged in the rotary spherical digester 12, and the edge of the circular plate-shaped filter assembly is fixedly connected with the inner wall of the rotary spherical digester 12 through a bolt 24; the filter assembly divides the space in the spherical digester 12 into an upper material processing chamber with a material feeding port 13 and a lower liquid collecting chamber;

one end of a steam pipe 11 is connected with a high-temperature steam pipeline outside the spherical digester 12, the other end of the steam pipe 11 extends into the material processing chamber of the spherical digester 12, the pipeline extending into the spherical digester 12 is bent downwards and faces towards the filtering component, high-temperature steam enters from a steam inlet 7 of the high-temperature steam pipe 11 and is communicated into the spherical digester 12, and a steam pipeline valve is arranged on the pipeline of the steam pipe 11 outside the spherical digester 12; one end of a liquid discharge pipe 3 is provided with a liquid discharge port 6, the liquid discharge port 6 is connected with a pipeline outside the spherical digester 12, the other end of the liquid discharge pipe 3 extends into the bottom of the liquid collection chamber, the filter assembly is positioned at the upper part of the other end of the liquid discharge pipe 3, and a liquid discharge port valve is arranged on the pipeline outside the spherical digester 12 of the liquid discharge pipe 3 to control liquid discharge; one end of a liquid inlet pipe is connected with a cleaning water pipeline outside the spherical digester 12, a liquid inlet valve is arranged at a liquid inlet 20 of the liquid inlet pipe on the pipeline outside the spherical digester 12, and the other end of the liquid inlet pipe extends into the material treatment chamber; one end of an exhaust pipe 15 is connected with an external pipeline of the spherical digester 12, the other end of the exhaust pipe extends into the material processing chamber, and an exhaust valve is arranged at an exhaust port 19 of the exhaust pipe 15, which is positioned on the pipeline outside the spherical digester 12.

The specific operation steps are as follows:

opening a steam pipeline valve, introducing high-temperature and high-pressure steam from a steam inlet 7, starting heating, displaying the temperature of the device by a pressure gauge on a high-temperature steam pipeline externally connected with a steam pipe 11, starting heat preservation after the device reaches the required temperature, performing steaming and boiling processes, opening a liquid discharge port valve outside a spherical digester 12 after reaching the time, discharging black liquor in the spherical digester 12 out of the sphere through a liquid discharge pipe 3 by using the pressure inside the spherical digester 12, discharging the black liquor into a container connected with a liquid discharge port 6 pipeline until no black liquor is discharged, opening the steam pipeline valve, introducing high-pressure gas, further discharging the black liquor by using the pressure of the high-pressure gas until the pressure gauge on the high-pressure gas or the high-temperature and high-pressure steam pipeline displays zero, and simultaneously closing the liquid discharge port valve and the steam pipeline valve;

in addition, the device can also carry out cleaning and bleaching operations, specifically, a liquid inlet valve and an exhaust valve are opened, the cleaning water quantity is controlled by a flow meter or a metering pump on a cleaning water pipeline, the liquid inlet valve and the exhaust valve are closed after the water quantity meets the requirement, the material in the rotary spherical digester 12 is cleaned, after the time is reached, a liquid outlet valve and a steam pipeline valve are opened, high-pressure gas is introduced, cleaning liquid is discharged by utilizing the high-pressure gas, and the liquid outlet valve and the steam pipeline valve are closed after no liquid flows out; opening a cleaning water inlet valve and an exhaust valve, and repeating the actions until the pH value of the discharged cleaning liquid meets the requirement;

by adopting the device, the mixture obtained after high-temperature and high-pressure cooking directly utilizes the vapor pressure in the spherical digester 12 to discharge the black liquor obtained by reaction, if the vapor pressure in the spherical digester 12 is not enough, the vapor can be pressurized into the spherical digester through the vapor pipe 11, so that the liquid in the spherical digester 12 is completely extruded, meanwhile, because the reaction and the filtration are completed in the spherical digester 12, the temperature difference between the two steps of operation can not be generated, the probability of condensation reaction of lignin in the black liquor is effectively reduced, and the quality of the product is ensured.

< example 3>

A method for producing dietary fiber, comprising:

mixing the weighed raw material bagasse and a medicament, steaming at high temperature and high pressure, filtering for the first time, cleaning for the first time, bleaching, filtering for the second time and cleaning for the second time to obtain a crude product of the sugarcane fiber, wherein the operations are all completed in an integrated dietary fiber production device, and the integrated dietary fiber production device, as shown in figures 1 to 5, comprises:

the rotary spherical digester 12 is a hollow sphere, and a pair of shaft holes which are symmetrical relative to the spherical center of the rotary spherical digester 12 are formed in the rotary spherical digester 12; the two shaft holes are respectively connected with a left rotating shaft 9 and a right rotating shaft 16 which are coaxial, and the left rotating shaft and the right rotating shaft are both of hollow shaft structures; the left rotating shaft 9 and the right rotating shaft 16 are both horizontally arranged, and a coaxial transmission assembly 17 is arranged on the right rotating shaft; one ends of the left rotating shaft 9 and the right rotating shaft 16, which are far away from the rotary spherical digester 12, are coaxially connected with a rotary joint; the connection between the left rotating shaft 9 and the left rotating joint 8 and the connection between the right rotating shaft 16 and the right rotating joint 18 are realized through a bearing seat 10; the specific connection mode is shown in figure 1; the bearing seat 10 is fixedly connected with the corresponding vertical base to play a role in supporting and erecting the rotary spherical digester 12;

the transmission assembly 17 can be gear transmission or speed reducer transmission, and the rotary spherical digester 12 can rotate around the left rotating shaft 9 and the right rotating shaft 16 by an external rotating motor;

a material feeding port 13 is arranged at the highest point of the rotary spherical digester 12, a sealing valve is arranged on the material feeding port 13, an auxiliary agent adding valve 5 is arranged at a position, close to the material feeding port 13, of the rotary spherical digester 12, wherein the material feeding port 13 is used for completing feeding and discharging operations, and the material feeding port 13 is closed in other operations;

a circular plate-shaped filter assembly is fixedly arranged in the rotary spherical digester 12, the filter assembly is opposite to the material feeding port 13, and the filter assembly divides the space in the rotary spherical digester 12 into a material processing chamber and a liquid collecting chamber; the edge of the filter component is fixedly connected with the inner wall of the spherical digester 12; the filter assembly comprises an upper pressing plate 23, filter cloth 22 and a lower sieve plate 21, wherein the upper pressing plate 23, the filter cloth 22 and the lower sieve plate 21 are stacked; the rotary spherical digester 12 is provided with a manual valve 1, the manual valve 1 and the feeding port 13 are arranged in a central symmetry mode with the center of the rotary spherical digester 12, and the manual valve 1 is located at the lowest position of the liquid collecting chamber;

the filter assembly is connected with the inner wall of the rotary spherical digester 12 through a plurality of grid support plates 2, the grid support plates 2 are perpendicular to the filter assembly and are positioned in the liquid collecting chamber, and the filter assembly is further reinforced and supported;

one end of a steam pipe 11 is connected with a high-temperature steam pipeline outside the spherical digester 12, and the other end of the steam pipe passes through the left rotating shaft and extends into a treatment chamber of the spherical digester 12 through a corresponding rotating joint; a liquid discharge pipe 3 is coaxially sleeved with the steam pipe 11, one end of the liquid discharge pipe 3 is connected with an external pipeline of the spherical digester 12, and the other end of the liquid discharge pipe 3 penetrates through the side wall of the steam pipe 11 to extend into the spherical digester 12 and simultaneously penetrates through the filtering component to extend into the liquid collecting chamber; the steam pipe 11 and the part of the liquid discharge pipe 3 extending into the spherical digester 12 rotate simultaneously with the spherical digester 12;

one end of a liquid inlet pipe is connected with a cleaning water pipeline outside the rotary spherical digester 12, wherein the cleaning water pipeline can be a tap water pipeline, the other end of the cleaning water pipeline penetrates through a right rotary shaft and extends into a treatment chamber of the rotary spherical digester 12 through a corresponding rotary joint, an exhaust pipe 15 is coaxially sleeved with the liquid inlet pipe, one end of the exhaust pipe 15 is connected with the pipeline outside the rotary spherical digester 12, and the other end of the exhaust pipe penetrates through the side wall of the liquid flowing pipe 14 and extends into the treatment chamber of the rotary spherical digester 12; the part of the liquid walking pipe 14 and the exhaust pipe 15 extending into the spherical digester 12 and the spherical digester 12 rotate simultaneously;

sealing valves are arranged on the steam pipe 11, the liquid discharge pipe 3, the liquid inlet pipe and the exhaust pipe 15, the valve on the steam pipe 11 is a steam pipeline valve, the valve on the liquid discharge pipe 3 is a liquid discharge pipe 3 valve, and the valve on the liquid inlet pipe is a liquid inlet valve;

the filtering component comprises an upper pressing plate 23, filtering cloth 22 and a lower sieve plate 21, wherein the upper pressing plate 23, the filtering cloth 22 and the lower sieve plate 21 are overlapped, and the filtering cloth 22 is used for recovering fibers;

the lower part of the filtering component is connected with the inner wall of the spherical digester 12 through a plurality of grid supporting plates 2 so as to support the filtering component, and the grid supporting plates 2 are vertical to the filtering component and are positioned in the liquid collecting chamber.

The left rotating shaft 9 is coaxially sleeved with a left reinforcing plate 4, the right rotating shaft 16 is coaxially sleeved with a right reinforcing plate 4, and the left reinforcing plate 4 and the right reinforcing plate 4 are both bowl-shaped and are tightly attached to the outer wall of the rotary spherical digester 12; a plurality of reinforcing plates 5 are arranged on the left reinforcing plate 4 by taking a central shaft of the left reinforcing plate 4 as an axis, and the reinforcing plates 5 are vertical to the left reinforcing plate 4 and are fixedly connected with the left rotating shaft 9; the right reinforcing plate 4 is provided with a plurality of reinforcing plates 5 by taking the central shaft of the right reinforcing plate 4 as an axis, and the reinforcing plates 5 are perpendicular to the right reinforcing plate 4 and are fixedly connected with the right rotating shaft 16.

The liquid inlet pipe extends into the part inside the rotary spherical digester 12 and is bent and attached to the inner wall of the rotary spherical digester 12, the bending direction of the liquid inlet pipe faces the material walking port 13, the port of the liquid inlet pipe is closed, a plurality of liquid spraying holes are formed in the pipe wall, and the liquid spraying direction of the liquid spraying holes faces the filtering component.

The steam pipe 11, the liquid discharge pipe 3, the liquid inlet pipe and the sealing valves on the exhaust pipe 15 are controlled to be closed and opened through a PLC control system.

The specific using method comprises the following steps:

1) feeding:

starting a transmission assembly 17 of the device, rotating the ball body to stop the material feeding port 13 at the topmost end of the ball body, adding clean water into the ball body through a cleaning water inlet, controlling the water quantity by a flow pump or a flowmeter (the liquid level of the water surface is lower than an exhaust port in the ball), adding weighed raw materials and medicaments through the material feeding port 13, and locking the material feeding port 13;

2) steaming and boiling:

opening a steam pipeline valve, introducing high-temperature and high-pressure steam from a steam inlet 7, starting heating and starting the device to operate, displaying the temperature of the device by a pressure gauge on an external steam pipeline, controlling the operating speed of the device by a frequency converter, starting heat preservation after the device reaches the required temperature, performing a steaming and boiling process, turning a material feeding port 13 of the device to the highest point of steaming after the time is reached, and stopping the rotation of the device when a liquid discharge pipe 3 in a ball is at the lowest point of the device;

3) and (3) filtering:

opening a liquid discharge port valve outside the sphere, discharging black liquor in the spherical digester 12 to the outside of the spherical digester 12 through a liquid discharge pipe 3 by using the pressure in the spherical digester 12, discharging the black liquor to a container connected with a liquid discharge port 6 pipeline until no black liquor is discharged, opening a steam pipeline valve, introducing high-pressure gas, further discharging the black liquor by using the pressure of the high-pressure gas until the pressure gauge on a high-pressure gas or high-temperature high-pressure steam inlet pipeline shows zero, and simultaneously closing the liquid discharge port valve and the steam pipeline valve;

4) cleaning:

opening a liquid inlet valve and an exhaust valve, introducing cleaning water into a liquid flowing pipe 14, controlling the amount of the cleaning water by a flowmeter or a metering pump on a cleaning water pipeline, closing the liquid inlet valve and the exhaust valve after the water amount meets the requirement, starting a device to operate, cleaning materials in a spherical digester 12, stopping the rotation of the device after the time is reached, enabling a manual valve 1 to be at the lowest position, enabling a material flowing port 13 to be at the highest position, opening a liquid discharging port valve and a steam pipeline valve, introducing high-pressure gas, discharging the cleaning liquid by using the high-pressure gas, and closing the liquid discharging port valve and the steam pipeline valve after no liquid flows out; opening a cleaning water inlet valve and an exhaust valve, and repeating the actions until the pH value of the discharged cleaning liquid meets the requirement;

5) bleaching:

stopping rotating the device, enabling the material feeding port 13 to be at the highest position, closing the liquid discharging port valve, opening the cleaning water inlet valve and the exhaust valve, adding quantitative clean water, controlling the water quantity by a flow meter or a metering pump, opening the auxiliary agent adding valve 5, adding the bleaching auxiliary agent, closing the valve, opening the steam pipeline valve, starting the device to operate, closing the steam pipeline valve after the temperature and the pressure display meet the requirements, and continuously rotating the device to meet the time requirements of the process.

6) And (3) filtering:

the device stops transferring, the material outlet 13 is at the highest position, the liquid outlet valve and the steam pipeline valve are opened, the floating liquid is discharged, and when the high-pressure gas display meter shows zero, the valve is closed;

7) cleaning:

the device stops rotating, the liquid discharge valve port is in an open state, the cleaning water inlet valve is opened, and cleaning water is introduced to carry out a cleaning process on the materials until the pH value of the discharged cleaning water meets the requirement;

8) unloading:

starting the device for transferring, enabling the material feeding port 13 to rotate to the lowest point, opening the material feeding port 13, unloading the material from the device, and conveying the material to a corresponding workshop for the next processing procedure;

the device can be controlled by a PLC (programmable logic controller) to form a control system, and the valves at all parts can be automatically closed and opened or manually operated in a control mode, so that the labor intensity of workers is reduced.

By adopting the technical scheme, after the cooking process is finished, the black liquor and the fibers are separated by the filter cloth 22 and then discharged out of the sphere by utilizing the internal pressure of the spherical digester 12, if the subsequent pressure is insufficient, high-pressure gas or high-temperature high-pressure steam can be added to pressurize the interior of the sphere, so that the black liquor is discharged to the maximum extent, the extraction rate of the black liquor is improved, and the black liquor can be collected in a centralized manner by connecting the black liquor with a pipeline through a liquor discharge port 6 of a liquor discharge pipe 3 outside the sphere; moreover, when the filtering operation is carried out, the temperature difference of the materials is small, the polymerization degree of lignin in the black liquor is low, the separation effect is better than that of the prior art, and the separation is thorough; in addition, when the fiber containing black liquor is cleaned, the rotary spherical digester 12 is rotated to achieve the purpose of stirring, so that the cleaning process can be quickly completed, and the water quantity is saved; the filter assembly is horizontally arranged in the rotary spherical digester 12, so that the thickness of a fiber layer formed by materials is uniform when the fibers are washed after being bleached in the rotary spherical digester, clear water enters the liquid collecting chamber through the fiber layer from top to bottom through the filter cloth 22 to complete the washing of the fibers, and then is discharged through the liquid discharge pipe 3, the fibers at each position are thoroughly washed, and the using amount of the clear water is saved.

Through detection, according to the detection standard of the cellulose in the GB 29946-2013 food additive, the cellulose content of the dietary fiber directly obtained by adopting the technical scheme of the invention reaches 96 percent and is far more than 92 percent of the current national standard, while the cellulose content of the dietary fiber obtained by the traditional multi-device step-by-step preparation is only 90-93 percent.

While embodiments of the invention have been disclosed above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in a variety of fields of endeavor to which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.