CN212306697U

CN212306697U - Device for producing plant textured protein by combined extrusion and steam injection method

Info

Publication number: CN212306697U
Application number: CN202020378472.1U
Authority: CN
Inventors: 常大伟
Original assignee: Shaanxi University of Science and Technology
Current assignee: Shaanxi University of Science and Technology
Priority date: 2020-03-23
Filing date: 2020-03-23
Publication date: 2021-01-08
Anticipated expiration: 2030-03-23

Abstract

The utility model discloses a device of joint extrusion and steam injection method production plant textured protein, including the extruder, the one end of extruder is connected with the motor that is used for driving the extruder, other end exit linkage mould, and the mould is thin pipeline in the middle of the both ends is thick, and one side that extruder upper portion is close to the motor is provided with the feed inlet, and the feed inlet is connected to feeding device, and feeding device's entry intercommunication is to the plant protein paste, and the exit linkage of mould has the back pressure device, the back pressure device is opened when pressure reaches the preset threshold value, and the back pressure device lower part sets up the product export. The utility model discloses the part that will let in high temperature high pressure steam's injection section has designed into the shape of similar "venturi" pipe for the first time, makes the steam of spouting can make the material fully dispersed with the more abundant effect of thin layer material in the narrow section of mould, at the wide mouthful section of mould, does benefit to the diffusion of harmful flavor material in the material.

Description

Device for producing plant textured protein by combined extrusion and steam injection method

Technical Field

The utility model belongs to plant tissue protein preparation field, concretely relates to device of joint extrusion and steam injection method production plant tissue protein product.

Background

In recent years, along with the improvement of living standard of people, people pay more and more attention to nutrition and health care of food. According to statistics, the protein intake in the diet of the residents in China is 17.8 percent lower than the standard value, so that the reduction of calorie and fat and the increase of the intake of vegetable protein are urgent matters for the adjustment of the dietary structure of the residents in China.

The plant protein has the advantages of low price, strong production capacity, high energy efficiency, almost no cholesterol and saturated fatty acid, capability of increasing the supply of protein food and the like, and reduces the stress on the environment compared with the common animal feeding and slaughtering. The vegetable protein contains the phytochemicals such as isoflavone, saponin and the like which have the effects of reducing blood fat, preventing osteoporosis, reducing blood sugar, controlling body weight and the like, so the vegetable protein is a good protein source for the old and vegetarians.

The vegetable protein texturizing technology is to texturize vegetable protein through physical, chemical and other methods, change the property of the vegetable protein, generate a fiber structure similar to muscle, improve the taste of the vegetable protein, expand the application range in food or feed processing and improve the nutritive value. The fiber meat is produced by adopting a high-moisture vegetable protein texturizing technology, not only can meet the desire of people to eat meat, but also can prevent various rich diseases, and has wide application prospect in the fields of food production and consumption.

The main mode for producing textured protein at present is a cooking extrusion method, which mainly adopts an extrusion device method, adopts high temperature of 130-170 ℃ in an extrusion cavity, and obtains textured protein by cooling and condensing through a cooling die. The method for producing textured protein with better quality is a high-moisture cooking extrusion method (the water content of the material is required to be more than 40%). The requirement on extrusion equipment is relatively high, and the temperature parameter setting of the extrusion cavity of a general extruder is divided into a plurality of sections for temperature control, for example, the temperature of the extrusion cavity from a feeding port to a die head is controlled in 4 sections, the temperature of the first section is 40 ℃, the temperature of the second section is 65 ℃, the temperature of the third section is 120 ℃, and the temperature of the fourth section is 150 ℃.

The first and second stages are mainly preheating stages, and the third and fourth stages mainly perform cooking. The temperature gradient of each section is large, and particularly, in the second section, the third section and the fourth section, the set temperature of each section is kept within a certain range as small as possible to be better to produce products with good quality, so that the requirement on equipment is high. And the first section and the second section mainly play a preheating role, and the temperature cannot be set to be too high and is generally lower than 80 ℃. If the temperature of the first two sections is too low, if the material is not preheated enough, the temperature in the extruder cannot reach the required temperature condition, the material may not be completely cured, the obtained product has half-cooked shape, and the obtained product is difficult to form uniform texture, loose and fragile, and has half-cooked phenomenon. Meanwhile, if the temperature of the first two sections is set to be too high and exceeds 80 or 90 ℃, materials are easy to bond just after entering the extrusion cavity, the problem of material return occurs, steam is emitted from a feeding port, and the materials are difficult to convey. The above situation is severe with increasing moisture content and increasing temperature.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a device of plant tissue protein product is produced to joint extrusion and steam injection method to overcome prior art's defect, the utility model discloses a steam high temperature high pressure effect makes the protein material have better feel, and volatilize harmful flavor thing, the degree of tissue can further be improved to the use of back pressure device simultaneously. Simultaneously the utility model discloses the part that will let in high temperature high pressure steam's injection section for the first time has designed into the shape of similar "venturi" pipe, makes the steam of spouting can with the more abundant effect of thin layer material in the narrow section of mould, enables the material homodisperse in the wide mouth section of mould, does benefit to the diffusion of harmful flavor material in the material.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a device for producing plant textured protein products by a combined extrusion and steam injection method comprises an extruder, wherein one end of the extruder is connected with a motor for driving the extruder, the outlet of the other end of the extruder is connected with a die, a feed inlet is formed in one side, close to the motor, of the upper part of the extruder, the feed inlet is connected to a feeding device, the inlet of the feeding device is communicated to plant protein paste, the outlet of the die is connected with a back pressure device, the back pressure device is opened when the pressure reaches a preset threshold value, and a product outlet is formed in the lower part;

the mould includes the pipeline of both ends thickness centre thin, and the both ends of pipeline are round platform type structure, and the centre is the drum type structure, and the inside forming device that is provided with of pipeline, forming device's one end are enclosed construction, and the other end is uncovered structure, and forming device's enclosed construction setting is in the round platform type structure that is close to extruder export one side, and forming device's uncovered structure setting is in the drum type structure, form even clearance between forming device outer wall and the pipeline inner wall, the interlude is provided with the nozzle on the mould, and the one end that the nozzle is located the mould outside communicates to high temperature high pressure steam, and the other end setting is inside forming device, just to the one side of uncovered structure.

Furthermore, the extruder comprises a first temperature control section, a second temperature control section, a third temperature control section and a fourth temperature control section which are sequentially connected in series, and the feed inlet is positioned on the upper side of the first temperature control section.

Furthermore, the back pressure device comprises a sealing shell, two parallel plates are arranged in the sealing shell, a product channel is formed between the two parallel plates, an inlet of the product channel is connected with the circular truncated cone-shaped structure far away from one side of an outlet of the extruding machine, a pressure baffle is arranged at the inlet of the product channel, the pressure baffle is opened when the pressure reaches a preset threshold value, and the outlet of the product channel is a product outlet.

Further, the distance between the two parallel plates is 2-20 mm.

Compared with the prior art, the utility model discloses following profitable technological effect has:

the utility model discloses with the vegetable protein of different grade type, for example soybean protein, zein, wheat gluten etc. mix into the mixture of similar dough form-vegetable protein paste with water, at first extrude the protein material of tubular structure with the material in the mould through extrusion equipment, let in high temperature high pressure steam simultaneously, the high temperature high pressure steam jet zone of this mould is the shape of similar "venturi" pipe, make the high temperature high pressure steam that lets in and form the tubulose material earlier through a long and narrow district, then pass through an expansion mouth again, further blow into anomalous shape, these anomalous shape's material is at steam effort rethread a long and narrow die orifice that has the back pressure effect at last, and obtain the protein product that has the tissue and the taste of similar animal meat. Under the action of high temperature and high pressure of steam, the protein material has better texture and volatilizes harmful flavor substances. The use of back pressure device can further improve the degree of organizing simultaneously, the utility model discloses a steam lets in the mode and designs into similar "venturi" shape, thin structure in the middle of the thick both ends promptly, and on the one hand, steam can produce tensile effort to the extrusion material in the pipeline for the material is further broken dispersion when the sudden grow of pipe diameter simultaneously.

Further, the utility model discloses the curing of high moisture protein is mainly in high temperature high pressure injection district with organizing, and the extruder mainly acts on and makes whether further mixing, preheating and shaping of high moisture material can be in the extrusion chamber to make production technology can serialization. The temperature is set to gradually increase from the feeding port to the die in a gradient manner, the temperature gradient is small, and the maximum temperature does not exceed 110 ℃. The current high moisture extrusion cooking texturizing protein device does not have the problems as previously described.

Further, the utility model discloses a back pressure device, on the one hand can make the pressure decline of spouting the community of high temperature high pressure steam can not be too fast, makes the material can whether keep certain time in the mould district to can further make steam produce shearing force to the material at the long export section of back pressure device (long product export promptly), make organize the effect better.

Drawings

Fig. 1 is a schematic view of the structure of the device of the present invention.

Wherein, 1, plant protein paste; 2. an extruder; 3. high-temperature high-pressure steam; 4. a back pressure device; 5. A motor; 6. a feeding device; 7. a feed inlet; 8. a mold; 9. a product outlet; 10. a nozzle; 11. a molding device; t1, a first temperature control section; t2, a second temperature control section; t3, a third temperature control section; t4 and a fourth temperature control section.

Detailed Description

The structure of the present invention will be further described in detail with reference to the accompanying drawings:

referring to fig. 1, the extruder 2 of the present invention is a twin-screw engaging structure, and the screws have the functions of conveying, mixing, kneading materials, etc. 4 sections of temperature control are carried out in the extrusion cavity, and the temperature can be preheated to a relatively low temperature, wherein the temperature range is 90-110 ℃; and controlling the screw at a lower speed, typically 30-110rpm, in order not to subject the proteinaceous material to significant physical changes, primarily to further shape the proteinaceous material having a higher moisture content in the extrusion die; the die 8 is connected to the extruder 2 and cooperates therewith to form the proteinaceous material into a rigid tubular structure. The mould 8 is small enough to ensure that it can be blown open under pressure, even if the tubular structure is made as thin as possible, the mould pressure (i.e. the pressure from the extruder into the narrow passage of the mould) is in the range of 1000-, the channel is formed by 2 parallel plates after being pushed open, and the distance between the 2 parallel plates is limited within a certain range, such as 2-20mm, in order to maintain a certain pressure.

The steps of preparing textured protein by the apparatus are as follows:

1. firstly, plant protein raw materials are crushed and sieved by a sieve with 60 meshes or more than 60 meshes, then the plant protein raw materials and water are mixed in a mixing device for humidifying treatment to form plant protein paste 1 with the solid content of about 40-65%, and then the plant protein paste is conveyed to a screw part in an extruder cavity through a screw of a feeding system.

2. Under the driving action of a screw, the premixed dough enters an extrusion device, the temperature of an extrusion cavity from a feeding port inlet to a die head is a first temperature control section T1 with the temperature of 30-45 ℃, a second temperature control section T2 with the temperature of 50-65 ℃, a third temperature control section T3 with the temperature of 70-80 ℃ and a fourth temperature control section T4 with the temperature of 90-110 ℃, and the rotation speed is 30-110rpm, so that the dough is not organized in the extrusion cavity and is mainly subjected to the actions of extrusion, shearing, kneading, mixing, forming and the like.

3. The die 8 is connected to the screw feeder of the extruder 2 and the two co-operate to form the proteinaceous material into a tubular structure of a certain stiffness. The aperture of the material channel in the mould is small enough to ensure that the material channel can be blown open under the action of steam pressure. The pressure of the mould is 1000-1400psi, the protein material forms the tubular structure under the action of the forming device 11 and the mould 8, and then high-pressure high-temperature steam 3 is introduced.

4. The high-temperature high-pressure steam 3 is sprayed to the inner side of the forming device 11 through the nozzle 10, the high-temperature high-pressure steam has the pressure of 80-160psi, the tubular protein material is stretched, external force is applied to the surface of the tubular protein material, and the tubular protein material is blown into an irregular shape. The high temperature and high pressure steam spraying area is designed to be similar to a Venturi tube structure, firstly, under the action of steam, the protein enters a narrow area, the processing area is a slender tube, the material is kept in the area for a period of time, the protein material forms better texture and volatilizes harmful flavor substances under the action of the high temperature and high pressure of the steam, and the temperature range of the area is 125-220 ℃. The high-temperature high-pressure steam can generate higher speed and tensile strength to act on tubular protein in the area part with small diameter, so that the organized protein is favorably formed, the pipe diameter is suddenly changed after passing through the bell mouth, the pressure is reduced, the organized protein is favorably blown into an irregular shape, and finally the organized protein enters the back pressure device 4.

5. Finally, the protein is passed through a counter-pressure device 4 which is opened only when a certain pressure is reached, the counter-pressure device has a pressure in the range of 40-110psi and allows the material to pass through only a narrow passage, in which area the protein is stretched twice and finally textured protein is obtained.

The main principle of the device is as follows: after premixing, the material containing certain water content enters into the extruder through the feeding device, and is acted by the input, shearing, mixing, kneading, heating and the like of the screw in the extruder, so as to gradually form a 'protein pasty material' similar to dough, and then enters into the die through the extrusion cavity to gradually push the 'protein pasty material' into a ring-shaped protein thin layer, after the 'protein pasty material' reaches a high-temperature high-pressure steam injection area, the material is in a high-temperature high-pressure state under the action of high-temperature high-pressure steam, the protein pasty material is gradually organized along with the injection action of the steam, in the stage, the material is firstly extruded into a tubular protein material in the die through the extrusion equipment, and simultaneously the high-temperature high-pressure steam is introduced, the high-temperature high-pressure steam community of the die is in a shape similar to a 'Venturi' pipe, so that the introduced high-, then further blown into irregular shapes through an expanding opening, and finally the irregular-shaped substances pass through a long and narrow die with back pressure under the action of steam, so that a protein product with the tissue and the taste similar to animal meat is obtained. And because the high pressure exceeds the saturated vapor pressure at the extrusion temperature, the water in the material in the extruder does not boil and evaporate, and the material is in a molten state at such a high temperature. When the material is extruded from the outlet of the counter-pressure device, the pressure is suddenly reduced to normal pressure, and moisture in the material is instantly flashed and diffused, so that some bad flavor substances such as beany flavor and the like in the soybean protein in the material are discharged.

Claims

1. The device for producing the plant textured protein by the combined extrusion and steam injection method is characterized by comprising an extruder (2), wherein one end of the extruder (2) is connected with a motor (5) for driving the extruder (2), the outlet of the other end of the extruder is connected with a die (8), a feed inlet (7) is formed in one side, close to the motor (5), of the upper portion of the extruder (2), the feed inlet (7) is connected to a feeding device (6), the inlet of the feeding device (6) is communicated to the plant protein paste (1), the outlet of the die (8) is connected with a back pressure device (4), the back pressure device (4) is opened when the pressure reaches a preset threshold value, and a product outlet (9) is formed in the lower portion of the;

mould (8) are thin pipeline in the middle of including both ends thickness, and the both ends of pipeline are round platform type structure, and the centre is the drum type structure, and inside forming device (11) that is provided with of pipeline, the one end of forming device (11) is enclosed construction, and the other end is uncovered structure, and the enclosed construction setting of forming device (11) is in the round platform type structure that is close to extruder export one side, and the uncovered structure setting of forming device (11) is in the drum type structure, form even clearance between forming device (11) outer wall and the pipeline inner wall, the interlude is provided with nozzle (10) on mould (8), and one end that nozzle (10) are located the mould (8) outside communicates to high temperature high pressure steam (3), and the other end setting is inside forming device (11), just to the one side of uncovered structure.

2. The apparatus for producing textured vegetable protein according to claim 1, wherein the extruder (2) comprises a first temperature-controlling section (T1), a second temperature-controlling section (T2), a third temperature-controlling section (T3) and a fourth temperature-controlling section (T4) connected in series, and the feed port (7) is formed at an upper side of the first temperature-controlling section (T1).

3. A device for the production of textured plant protein by combined extrusion and steam injection as claimed in claim 1, wherein the counter-pressure means (4) comprises a sealed housing having two parallel plates disposed therein, a product channel being formed between the two plates, the inlet of the product channel being connected to the truncated cone-shaped structure on the side remote from the outlet of the extruder, and a pressure barrier being disposed at the inlet of the product channel and opening when the pressure reaches a predetermined threshold, the outlet of the product channel being the product outlet (9).

4. The apparatus for producing textured vegetable protein according to claim 3, wherein the distance between the two parallel plates is 2 to 20 mm.