阅读说明：本技术 蒸汽电热连续式杀菌机 (Steam electric heating continuous sterilizer ) 是由 蒋祥 庄晓波 张维军 于 2020-09-01 设计创作，主要内容包括：本发明涉及一种蒸汽电热连续式杀菌机,包括定量喂料系统、电加热螺旋输送机、双向螺旋输送机、冷却螺旋输送机及干热蒸汽系统。该蒸汽电热连续式杀菌机可针对各种粉料、碎块状物料及颗粒状物料的连续杀菌,如：玉米、高粱、麦类、豆类,破碎后的饼类等,尤其针对香辛料、药草、种子、坚果及其它添加剂,采用本杀菌设备,所流失的易挥发性物质最小,以及杀菌后产品的颜色变化最小,特别是用在粉料及碎块状食品杀菌领域,本机结构简单,坚固耐用,安全可靠,安装容易,操作简单,生产率高。(The invention relates to a steam electric heating continuous sterilization machine, which comprises a quantitative feeding system, an electric heating screw conveyor, a bidirectional screw conveyor, a cooling screw conveyor and a dry heating steam system. The steam electric heating continuous sterilizer can continuously sterilize various powder materials, crushed block materials and granular materials, such as: corn, sorghum, wheat, beans, broken cakes and the like, particularly spice, herb, seed, nut and other additives, the sterilization equipment is adopted, so that lost volatile substances are minimum, the color change of sterilized products is minimum, and the sterilization equipment is particularly used in the field of powder and broken food sterilization.)

1. A steam electric heating continuous sterilization machine is characterized in that: comprises a quantitative feeding system, an electric heating screw conveyor, a bidirectional screw conveyor, a cooling screw conveyor and a dry hot steam system;

the quantitative feeding system is used for quantitative feeding;

the electric heating screw conveyor is arranged at the output end of the quantitative feeding system and is used for heating and sterilizing materials;

the bidirectional screw conveyer is correspondingly arranged at the output end of the electric heating screw conveyer and is used for separately discharging qualified materials and unqualified materials;

the cooling screw conveyer is correspondingly arranged at the output end of the bidirectional screw conveyer and is used for receiving qualified materials and cooling the qualified materials;

and the dry heating steam system is connected with the electric heating screw conveyer and is used for providing pressure steam for the electric heating screw conveyer.

2. The steam electric heating continuous sterilizer of claim 1, wherein: the steam electric heating continuous sterilization machine further comprises a dust removal system, and the dust removal system is respectively connected with the electric heating screw conveyor and the cooling screw conveyor.

3. The steam electric heating continuous sterilizer of claim 1, wherein: the quantitative feeding system comprises a storage box and a feeding auger arranged in the storage box, the feeding auger is controlled by a variable frequency motor, and a weighing sensor is arranged at the outlet end of the storage box.

4. The steam electric heating continuous sterilizer of claim 1, wherein: the electric heating screw conveyor comprises a machine groove and shaftless screw blades arranged in the machine groove.

5. The steam electric heating continuous sterilizer of claim 1, wherein: the cooling screw conveyor comprises a bin, a hollow rotating shaft, a screw blade, an angle blade, a water cooler, a screen, an air filter, a cold air collecting bin, a plurality of ventilating pipelines, a gas blocking device and a wind speed adjusting device, wherein the hollow rotating shaft is arranged in the bin, the screw blade is arranged at the feeding section of the hollow rotating shaft, the angle blade is arranged at the discharging section of the hollow rotating shaft, the water cooler is communicated with the inner cavity of the hollow rotating shaft, the bottom of the bin is provided with a ventilating opening, the screen is detachably arranged at the ventilating opening, one end of the ventilating pipeline is connected to the bottom of the ventilating opening, the other end of the ventilating pipeline is connected with the cold air collecting bin, the cold air collecting bin is connected with the air filter, the ventilating pipelines are formed by connecting a plurality of pipeline components with each other, the gas blocking, the gas separation device can block or release the gas entering in the cold air collection bin ventilation pipeline, the air speed adjusting device can adjust the gas in the ventilation pipeline to pass through the screen mesh entering the speed in the bin.

6. The steam electric heating continuous sterilizer of claim 1, wherein: the dry heating steam system comprises an electric heating steam generator and a steam pipeline, and the electric heating steam generator is communicated with the inner cavity of the electric heating screw conveyor through the steam pipeline.

The technical field is as follows:

the invention relates to the technical field of material sterilization, in particular to a steam electric heating continuous sterilization machine.

Background art:

the sterilization machine can continuously sterilize various powder materials, broken block materials and granular materials, such as: corn, sorghum, wheat, beans, broken cakes, and the like; especially for spices, herbs, seeds, nuts and other additives. However, some of the existing bactericides can not realize continuous production, and the bactericidal effect is not ideal.

The invention content is as follows:

the invention aims to overcome the defects of the prior art and provide a steam electric heating continuous sterilizer which has good sterilization effect, is flexible and convenient to adjust and can realize continuous production.

The invention is realized by the following technical scheme: a steam electric heating continuous sterilizer comprises a quantitative feeding system, an electric heating screw conveyor, a bidirectional screw conveyor, a cooling screw conveyor and a dry heating steam system;

the quantitative feeding system is used for quantitative feeding;

the electric heating screw conveyor is arranged at the output end of the quantitative feeding system and is used for heating and sterilizing materials;

the bidirectional screw conveyer is correspondingly arranged at the output end of the electric heating screw conveyer and is used for separately discharging qualified materials and unqualified materials;

the cooling screw conveyer is correspondingly arranged at the output end of the bidirectional screw conveyer and is used for receiving qualified materials and cooling the qualified materials;

and the dry heating steam system is connected with the electric heating screw conveyer and is used for providing pressure steam for the electric heating screw conveyer.

In order to avoid dust pollution to the environment, the steam electric heating continuous sterilization machine further comprises a dust removal system, and the dust removal system is respectively connected with the electric heating screw conveyor and the cooling screw conveyor.

In a preferred embodiment of the invention, the quantitative feeding system comprises a storage box and a feeding auger arranged in the storage box, the feeding auger is controlled by a variable frequency motor, and the outlet end of the storage box is provided with a weighing sensor.

In a preferred embodiment of the present invention, the electrically heated screw conveyor includes a machine trough and a shaftless screw blade disposed in the machine trough.

In order to achieve a better cooling effect, the cooling screw conveyor comprises a bin, a hollow rotating shaft, a screw blade, a blade with an angle, a water cooler, a screen, an air filter, a cold air collecting bin, a plurality of ventilating ducts, a gas blocking device and a wind speed adjusting device, wherein the hollow rotating shaft is arranged in the bin, the screw blade is arranged at the feeding section of the hollow rotating shaft, the blade with the angle is arranged at the discharging section of the hollow rotating shaft, the water cooler is communicated with the inner cavity of the hollow rotating shaft, the bottom of the bin is provided with a ventilating opening, the screen is detachably arranged at the ventilating opening, one end of the ventilating duct is connected with the bottom of the ventilating opening, the other end of the ventilating duct is connected with the cold air collecting bin, the cold air collecting bin is connected with the air filter, the ventilating duct is formed by connecting a plurality of duct components with each, the gas separation device can block or release the gas entering in the cold air collection bin ventilation pipeline, the air speed adjusting device can adjust the gas in the ventilation pipeline to pass through the screen mesh entering the speed in the bin.

Preferably, the dry heating steam system comprises an electric heating steam generator and a steam pipeline, and the electric heating steam generator is communicated with the inner cavity of the electric heating screw conveyor through the steam pipeline.

The invention has the beneficial effects that:

1. the sterilization temperature is controllable, and different sterilization temperature requirements can be realized;

2. the sterilization time is controllable, and the optimal sterilization time can be adjusted according to different strains;

3. compared with other machines, the total number of bacterial colonies after the material sterilization has obvious advantages and can be reduced to 99%;

4. the shaftless spiral structure realizes continuous production;

5. auxiliary heating is carried out by dry hot steam, and the water content of the material is controlled;

6. the quick cooling equipment combining air cooling and water cooling ensures the quality of the product;

7. the whole system adopts frequency conversion speed regulation control from feeding to discharging;

8. a high-precision temperature sensor is arranged in the heating and cooling sections to display the working temperature in real time;

9. the whole system is automatically controlled by a PLC or a computer;

10. in a word, the machine has simple structure, firmness, durability, safety, reliability, easy installation, simple operation and high productivity.

Description of the drawings:

FIG. 1 is a schematic structural view of a steam-electric heating continuous sterilizer of the present invention;

FIG. 2 is a schematic view of another direction of the steam-electric-heating continuous sterilizer of the present invention;

FIG. 3 is a schematic view of the structure of the cooling screw conveyor of the present invention;

fig. 4 is a schematic view of another direction of the cooling screw conveyor of the present invention.

The specific implementation mode is as follows:

the following detailed description of the preferred embodiments of the present invention, taken in conjunction with the accompanying drawings, will make the advantages and features of the invention more readily understood by those skilled in the art, and thus will more clearly and distinctly define the scope of the invention.

Referring to fig. 1 and 2, a steam electric heating continuous sterilizer comprises a quantitative feeding system 1, an electric heating screw conveyor 2, a bidirectional screw conveyor 3, a cooling screw conveyor 4, a dry heating steam system 6 and a dust removal system 5 which are arranged in sequence.

The rack platform is used for connecting and supporting the devices, so that normal operation of all parts of the system is guaranteed, vibration is reduced, and operation and maintenance are convenient.

The quantitative feeding system 1 is used for quantitative feeding, comprises a storage box, a feeding auger, a support upright post and other parts, is a system for storing raw materials to be sterilized and quantitatively feeding the raw materials according to control requirements, the feeding auger is controlled by a variable frequency motor, the feeding amount is adjustable, and all the materials are made of 304 stainless steel. Raw materials are fed from a storage bin through a screw feeder, the feeding amount of the screw feeder is set according to the yield requirement, and the frequency conversion is adopted for adjustmentThe method is realized quickly, a high-precision weighing sensor is arranged in the storage bin, and the weight of the material is displayed in real time; the system and the control center can realize data transmission and information feedback with the whole system; the storage bin and the spiral feeder are made of 304 stainless steel materials so as to meet the material quality requirement. Volume 1.5m³The spiral conveying power is 1.1 Kw.

The electric heating screw conveyor 2 is arranged at the output end of the quantitative feeding system and is used for heating and sterilizing materials. The electric heating screw conveyor 2 consists of a machine groove, a shaftless screw blade, a heating power supply, a conductive circuit board, a steam spraying system, a temperature sensor, an insulator, a conductive bearing and the like, and adopts a sterilization machine disclosed in CN102499336A of the prior application of the company; all the material contact parts are made of 304 stainless steel and food-grade tetrafluoroethylene, the conductive parts are made of standard metal copper plates, and the insulating parts are made of food-grade plastics or food-grade tetrafluoroethylene. The retention time of the material in a shaftless screw feeder with the length of 6.8m can be adjusted, the maximum time can reach 20 minutes, the material enters the next process from a discharge port, the shaftless screw blade is specially designed, the heating temperature is adjustable, the material is generally heated to 120 ℃ plus materials, and material throwing blades are arranged on the blade at intervals, so that the material is uniformly heated in the forward flowing process; the shaftless helical blade is processed by a special process, bearing supports are designed at two ends of the shaftless helical blade, the running deformation of the shaftless helical blade is reduced, a high-frequency low-voltage alternating-current power supply is switched on by a blade heating mode through rotary contact type contact controllers designed at two ends, the total power is 90-110Kw (adjustable), a shaft head at one end is insulated with a speed reduction motor by a nylon coupling, bearing wallboards at two ends of the blade are supported by a high-temperature-resistant insulating nylon plate, the gap between the blade and an outer wall cylinder body is 3-5mm, the cylinder body material is made of 304 stainless steel, a heat-insulating layer is designed at the outer layer, the rotating speed of the helical blade shaft is; the power is 1.5Kw, the material is at normal temperature before entering the cylinder, the temperature rises along with the forward conveying process until the temperature reaches 100-120 ℃ at the discharge end, bacteria (Escherichia coli, salmonella and coliform bacteria) causing diseases are completely killed, and the proper temperature control system and the material are sterilized in the process of continuous movement and rolling, so that the original quality of the material and the loss of volatile oil quantity are guaranteed. During the high temperature sterilization of the materials, the inner cavity of the whole cylinder is filled with a proper amount of dry steam to act simultaneously, and ozone can be filled into the cylinder to replace the steam for some special requirements and some germs (such as bud bud germs) which are difficult to kill, so as to achieve the best effect. The steam spraying mode ensures that materials stay in a steam (ozone) environment for a proper time and are fully contacted by installing 8-10 special nozzles at intervals, so as to achieve the optimal sterilization effect; the pressure of the whole steam pipeline is kept at about 0.01-0.02 MPa. A full-screen computer control system is adopted in the whole sterilization process, and particularly a high-sensitivity sensor is adopted in a temperature control system for online detection and real-time data feedback and real-time finishing control.

The bidirectional screw conveyor 3 is correspondingly arranged at the output end of the electric heating screw conveyor 2, is made of 304 stainless steel, discharges materials at two ends, effectively discharges qualified and unqualified materials for sterilization separately, and ensures the sterilization quality of products. The materials are discharged to the next working section by a spiral conveyor after sterilization treatment, the yield of the spiral conveyor is only required to be larger than the previous yield requirement, the spiral conveyor is designed to have a spiral diameter phi of 200mm, the rotating speed adopts a variable-frequency feeding mode, and the spiral blades and the cylinder body are all made of 304 stainless steel; the requirements of full-automatic control are adopted: mainly comprises an online detection system; after the materials subjected to electric heating and steam (ozone) sterilization treatment enter the discharge conveyor, the materials which do not meet the treatment requirements are automatically detected and converted, and the materials enter the previous system for re-sterilization treatment again until the requirements are met, and then the next procedure is carried out.

And the cooling screw conveyor 4 is correspondingly arranged at the output end of the bidirectional screw conveyor 3 and is used for receiving qualified materials and cooling the qualified materials. As shown in fig. 2-4, the cooling screw conveyor includes a storage bin 416, a hollow rotating shaft 43, a screw blade 44, an angled blade 45, a water chiller 42, a screen 415, an air filter 41, a cold air collecting bin 48, a plurality of ventilation ducts, an air blocking device 410, and an air speed adjusting device 49, the hollow rotating shaft 43 is disposed in the storage bin 416, the screw blade 44 is disposed at a feeding section (left end) of the hollow rotating shaft 43, the angled blade 45 is disposed at a discharging section of the hollow rotating shaft 43, the air chiller 42 is communicated with an inner cavity of the hollow rotating shaft 43, a ventilation opening 414 is disposed at the bottom of the storage bin 416, the screen 415 is detachably mounted at the ventilation opening 414, one end of the ventilation duct is connected to the bottom of the ventilation opening 414, the other end of the ventilation duct is connected to the cold air collecting bin 48, the cold air collecting bin 48 is connected to the air filter 41, the, the air blocking device 410 and the air speed adjusting device 49 are arranged on the ventilating duct, the air blocking device 410 can block or release air in the cold air collecting bin 48 to enter the ventilating duct, and the air speed adjusting device 49 can adjust air in the ventilating duct to pass through the screen 415 to enter the speed in the storage bin 416.

The cold air collecting bin 48 is used for storing cooled and dried gas, and the bottom of the storage bin 416 is U-shaped, so that the contact area of materials and cold air is increased conveniently, and the cooling efficiency is improved. Ventilating duct and vent 414 junction are provided with sealing washer 412, and ventilating duct is formed through staple bolt 47 each other by a plurality of pipe assembly connection, gaseous separation device 410 is the butterfly valve, and the butterfly valve can block or release gaseous entering in the storehouse 48 is collected to the cold wind ventilating duct, wind speed adjusting device 49 is adjustable gaseous passing screen cloth 415 in the ventilating duct gets into speed in the feed bin 416. In addition, the bottom of the storage bin 416 is provided with a hook 413 for hanging maintenance articles or replacing the ventilating duct before and after replacement.

The temperature of the material after electric heating and steam (ozone) treatment reaches 100-120 ℃, obviously does not meet the requirement of finished product packaging, and the material reaches normal temperature +/-3 ℃ through rapid cooling and drying, and the physicochemical property and stability of the product are maintained. The cooling screw conveyor 4 adopts discontinuous screw conveying, the hollow rotating shaft 43 is filled with cold water, the water temperature is controlled to be 4 +/-2 ℃, water is continuously supplied, the water pressure is 2-3kgf, and the water pressure can be adjusted according to requirements; the feeding blade is made into a blade spiral shape and is made of 304 stainless steel; the rotating speed of the spiral shaft is adjustable by adopting variable frequency, and the power is 3 Kw; the cylinder body is made of 304 stainless steel, dry and cold air is introduced into the whole cylinder body, the air consumption can be adjusted according to requirements, and the introduced air pressure is 0.01-0.02 Mpa. Adopts a water cooling and air cooling combined mode.

And the dry heating steam system 6 comprises an electric heating steam generator and a steam pipeline, and the electric heating steam generator is communicated with the inner cavity of the electric heating screw conveyor through the steam pipeline. The dry heating steam system 6 is used for increasing the sterilization effect and further controlling the humidity of the product, only a small amount of general pressure steam (3% of the product yield, about 0.03 Mpa) is needed, and the specific technical process is as follows: steam heating → pressurized conveying → steam spraying → steam exhaust recovery → powder in the filtered steam → steam reheating.

And the dust removal system 5 is respectively connected with the electric heating screw conveyor 2 and the cooling screw conveyor 4 and is used for absorbing smoke dust in the processing process.

The servo control system of the invention: the main purpose is to establish the optimal technological parameters of sterilization and drying according to different materials, and realize the intelligent regulation of sterilization temperature, steam quantity, sterilization time and feeding quantity. Not only ensures that various bacteria are killed, but also ensures that the product characteristics and the loss influence of volatile substances are minimum, and meets the requirement of European food grade. In order to achieve the aim, the temperature in the whole sterilization process needs to be controlled by a full-automatic servo system, the advanced non-contact temperature measurement technology, the temperature of a conveyor and other interferences are adopted, and the accurate surface temperature of the material is directly measured so as to control the sterilization temperature of each section in real time. The main technical process comprises the following steps: monitoring key points (CCP) → DSP data analysis processing → PLC control → adjusting of feed speed, heating power and steam amount.

This device still has the clearance access door: close open clearance access door, air spring structure is fixed, and the operation clearance is convenient.

The working process of the invention is as follows:

raw materials are fed from a storage bin through a screw feeder, the feeding amount of the screw feeder is set according to the yield requirement, the feeding is realized through variable frequency speed regulation, and the storage bin and the screw feeder are made of 304 stainless steel materials so as to meet the material quality requirement;

the material enters an electric heating screw conveyer with the length of 6.8m through a screw feeder, the retention time is adjustable, the maximum time can reach 20 minutes, the material enters the next process from a discharge port, a shaftless screw blade is specially designed, the heating temperature is adjustable, the heating temperature is generally 90-120 ℃, the maximum temperature can reach 200 ℃, and material throwing blades are arranged on the blade at intervals, so that the material is uniformly heated in the forward flowing process; the shaftless helical blade is processed by a special process, bearing supports are designed at two ends of the shaftless helical blade, the running deformation of the shaftless helical blade is reduced, a high-frequency low-voltage alternating-current power supply is switched on by a blade heating mode through rotary contact type contact controllers designed at two ends, the voltage and the current are adjustable, insulating food-grade plastics are used between a shaft head at one end and a speed reducing motor, high-temperature-resistant insulating materials are used for supporting bearing wallboards at two ends, a cylinder body is made of 304 stainless steel, tetrafluoroethylene is coated on the inner layer, a heat-insulating layer is designed on the outer layer, the rotational speed of a helical blade shaft is designed to be variable-frequency; the temperature of the materials is normal temperature before entering the cylinder, the materials are heated along with the forward conveying process until the temperature reaches a set temperature (generally 100-;

during the high temperature sterilization of the materials, the inner cavity of the whole cylinder is filled with a proper amount of dry steam to act simultaneously, and ozone can be filled into the cylinder to replace the steam for some special requirements and some germs (such as bud bud germs) which are difficult to kill, so as to achieve the best effect. The steam spraying mode ensures that materials stay in a steam (ozone) environment for a proper time and are fully contacted by installing 8-10 special nozzles at intervals, so as to achieve the optimal sterilization effect; the pressure of the whole steam pipeline is kept at about 0.01-0.03 MPa;

the whole sterilization process adopts a PLC or a computer control system, particularly a temperature control system adopts a high-sensitivity sensor to perform online detection and real-time data feedback and perform real-time finishing control;

the materials are discharged to the next working section by a spiral conveyor after sterilization treatment, the yield of the spiral conveyor is only required to be larger than the previous yield requirement, the spiral conveyor is designed to have a spiral diameter phi of 168mm, the rotating speed adopts a variable-frequency feeding mode, and the spiral blades and the cylinder body are all made of 304 stainless steel; the requirements of full-automatic control are adopted: mainly comprises an online detection system; after the materials after electric heating and steam sterilization treatment enter a discharging conveyor, automatically detecting and converting the materials which do not meet the treatment requirements, and then entering the previous system for re-sterilization treatment until the materials meet the requirements, and entering a next procedure, namely a rapid cooling system;

the temperature of the material after electric heating and steam adding treatment reaches 70-100 ℃, obviously does not meet the requirement of finished product packaging, and the material reaches the normal temperature +/-2-3 ℃ through rapid cooling and drying, and the physical and chemical properties and stability of the product are maintained. The cooling machine tank adopts discontinuous spiral conveying, cold water is introduced into the middle hollow shaft, the water temperature is controlled to be 4 +/-2 ℃, water is continuously supplied, the water pressure is 2-3kgf, and the water pressure can be adjusted according to requirements; the feeding blade is made into a blade spiral shape and is made of 304 stainless steel; the rotating speed of the spiral shaft is adjustable by adopting frequency conversion; the cylinder body is made of 304 stainless steel, dry and cold air is introduced into the whole cylinder body, the air consumption can be adjusted according to requirements, and the introduced air pressure is 0.01-0.03 MPa. The quick cooling is carried out by adopting a water cooling and air cooling combined mode, and finally the requirement of packaging can be met.

In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "top", "bottom", "side", "end", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In addition, in the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "disposed," "provided," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.