System for extracting zein from corn protein powder

Abstract

The utility model discloses a system for extracting zein from corn protein powder. The system comprises an enzymolysis unit, a multi-stage extraction unit and a refining unit, the enzymolysis unit comprises an enzymolysis tank and a first plate and frame filter, and the enzymolysis tank is communicated with a water storage tank and a first pH regulator storage tank; the multi-stage extraction unit comprises a primary extraction tank, a second plate-and-frame filter, a secondary extraction tank, a third plate-and-frame filter, a third extraction tank and a fourth plate-and-frame filter; a feeding hole of the primary extraction tank is communicated with a filter residue outlet of the first plate-and-frame filter; the refining unit comprises a dissolving tank, a purifying tank, a concentrating tank and a fifth plate-and-frame filter which are communicated with a filter residue outlet of the fourth plate-and-frame filter; the dissolving tank is communicated with a second pH regulator storage tank and an absolute ethyl alcohol storage tank; and a filter residue outlet of the fifth plate-and-frame filter is communicated with the belt dryer and the target product storage tank. The system can effectively extract the zein from the corn protein powder, the extraction rate is high, and the purity of the prepared zein is high.

Description

Technical Field

[0001] This utility model relates to the technical field of corn gluten powder processing equipment, and specifically to a system for extracting corn gliadin from corn gluten powder. Background Technology

[0002] Corn protein has a complex composition, containing various inorganic salts, organic matter, sugars, amino acids and other substances. Among them, prolysin has high economic value and broad application prospects, and is widely used in the fields of medicine, chemical industry, food and other fields.

[0003] In the wet processing of corn starch, corn gluten meal is a major byproduct, with zein comprising 50%-60%. This special protein is mainly stored within the protein bodies of corn endosperm cells. Zein bodies are approximately 1 μm in diameter and distributed among starch granules with a diameter of 5-25 μm. They are a heterogeneous mixture of peptides with different molecular weights, solubilities, and charges linked by disulfide bonds, with an average molecular weight of approximately 44,000. Therefore, extracting zein from corn gluten meal is of great significance; however, existing zein extraction equipment is inefficient and yields zein with low purity. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a system for extracting zein from corn gluten meal, which can effectively extract zein from corn gluten meal with a high extraction rate and high purity of the obtained zein.

[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0006] A system for extracting zein from corn gluten meal includes an enzymatic hydrolysis unit, a multi-stage extraction unit, and a purification unit;

[0007] The enzymatic hydrolysis unit includes an enzymatic hydrolysis tank and a first plate and frame filter. The enzymatic hydrolysis tank is connected to a water storage tank and a first pH adjuster storage tank. The enzymatic hydrolysis tank is also provided with an enzyme addition port.

[0008] The multi-stage extraction unit includes a primary extraction tank, a second plate and frame filter, a secondary extraction tank, a third plate and frame filter, a tertiary extraction tank, and a fourth plate and frame filter connected in series. The primary extraction tank, the secondary extraction tank, and the tertiary extraction tank are all connected to an extraction solvent storage tank. The feed inlet of the primary extraction tank is connected to the filter residue outlet of the first plate and frame filter.

[0009] The refining unit includes a dissolving tank, a purification tank, a concentration tank, and a fifth plate and frame filter connected to the filter residue outlet of the fourth plate and frame filter. The dissolving tank is connected to a second pH adjuster storage tank and an anhydrous ethanol storage tank. The filter residue outlet of the fifth plate and frame filter is connected to a belt dryer and a target product storage tank.

[0010] Preferably, the device also includes a pulverizer and a sieve connected together, wherein the material outlet of the sieve is connected to the feed inlet of the enzymatic hydrolysis tank.

[0011] Preferably, the enzymatic hydrolysis vessel is equipped with an ultrasonic transducer, which is connected to an ultrasonic generator outside the enzymatic hydrolysis vessel via a wire.

[0012] Preferably, the inner walls of the primary extraction tank, secondary extraction tank, and tertiary extraction tank are all equipped with spiral guide plates.

[0013] Preferably, the filtrate outlets of the second, third, and fourth plate and frame filters are connected to a pigment solution storage tank.

[0014] Preferably, the enzymatic hydrolysis tank, the primary extraction tank, the secondary extraction tank, the tertiary extraction tank, and the dissolving tank are all equipped with a stirring device; the stirring device includes a stirring shaft, a stirring motor connected to the stirring shaft, and stirring blades provided on the stirring shaft.

[0015] Preferably, the enzymatic hydrolysis tank, the primary extraction tank, the secondary extraction tank, the tertiary extraction tank, and the dissolving tank are all provided with a first jacket on their outer sides, and the first jacket is provided with a heating medium inlet and a heating medium outlet.

[0016] Preferably, the purification tank is provided with a second jacket on its outer side, and the second jacket is provided with a cooling water inlet and a cooling water outlet.

[0017] Due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0018] This invention provides a system for extracting zein from corn gluten meal, comprising an enzymatic hydrolysis unit, a multi-stage extraction unit, and a purification unit. During enzymatic hydrolysis, specific enzymes are used to directionally decompose non-target components such as starch and cellulose in the corn gluten meal, reducing the interference of impurities on subsequent purification, improving extraction efficiency, and enhancing the purity of the target product.

[0019] This system uses a multi-stage extraction unit to effectively remove impurities from the enzymatic hydrolysate, and the spiral guide plate design ensures that the filter residue and extraction solvent are in full contact, thereby improving the impurity removal efficiency.

[0020] The purification unit of this system effectively controls the pH value of the solution through a second pH adjuster, and slowly adds the solution obtained by dissolution to cold water for purification. Under specific pH and specific temperature, it promotes the selective precipitation of zein and improves the purity of the product.

[0021] The enzymatic hydrolysis vessel of this system is equipped with an ultrasonic transducer, which is connected to an ultrasonic generator outside the vessel via wires. The combined use of the ultrasonic transducer and a stirring device significantly improves the enzymatic hydrolysis efficiency.

[0022] The filtrate outlets of the second, third, and fourth plate and frame filters in this system are connected to a pigment solution storage tank, enabling simultaneous extraction of corn yellow pigment and increasing the added value of the raw materials. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of this utility model;

[0025] In the diagram: 1. Enzymatic hydrolysis tank; 2. First plate and frame filter; 3. Water storage tank; 4. First pH adjuster storage tank; 5. Enzyme addition port; 6. Primary extraction tank; 7. Second plate and frame filter; 8. Secondary extraction tank; 9. Third plate and frame filter; 10. Tertiary extraction tank; 11. Fourth plate and frame filter; 12. Extraction solvent storage tank; 13. Dissolving tank; 14. Purification tank; 15. Concentration tank; 16. Fifth plate and frame filter; 17. Second pH adjuster storage tank; 18. 19. Anhydrous ethanol storage tank; 20. Belt dryer; 21. Target product storage tank; 22. First jacket; 23. Heating medium inlet; 24. Heating medium outlet; 25. Second jacket; 26. Cooling water inlet; 27. Cooling water outlet; 28. Crusher; 29. ​​Screening machine; 30. Ultrasonic transducer; 31. Ultrasonic generator; 32. Spiral guide plate; 33. Pigment solution storage tank; 34. Stirring shaft; 35. Stirring motor; 36. Stirring blades. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0027] Example

[0028] like Figure 1 As shown, a system for extracting zein from corn gluten meal includes an enzymatic hydrolysis unit, a multi-stage extraction unit, and a purification unit.

[0029] The enzymatic hydrolysis unit includes an enzymatic hydrolysis tank 1 and a first plate and frame filter 2. The enzymatic hydrolysis tank 1 is connected to a water storage tank 3 and a first pH adjuster storage tank 4. The enzymatic hydrolysis tank 1 is also provided with an enzyme addition port 5.

[0030] The multi-stage extraction unit includes a primary extraction tank 6, a second plate and frame filter 7, a secondary extraction tank 8, a third plate and frame filter 9, a tertiary extraction tank 10, and a fourth plate and frame filter 11 connected in series. The primary extraction tank 6, the secondary extraction tank 8, and the tertiary extraction tank 10 are all connected to an extraction solvent storage tank 12. The feed inlet of the primary extraction tank 6 is connected to the filter residue outlet of the first plate and frame filter 2. Through staged extraction, impurities in the target product are effectively removed.

[0031] The refining unit includes a dissolving tank 13, a purification tank 14, a concentration tank 15, and a fifth plate and frame filter 16, all connected to the filter residue outlet of the fourth plate and frame filter 11. The dissolving tank 13 is connected to a second pH adjuster storage tank 17 and an anhydrous ethanol storage tank 18. The filter residue outlet of the fifth plate and frame filter 16 is connected to a belt dryer 19 and a target product storage tank 20. This device dissolves the precipitate and then slowly adds it to the purification tank 14, which contains cold water, effectively inducing the directional crystallization of proteins, removing impurities, and improving the purity of the target product.

[0032] The enzymatic hydrolysis tank 1, the primary extraction tank 6, the secondary extraction tank 8, the tertiary extraction tank 10, the dissolving tank 13, and the concentration tank 15 are all provided with a first jacket 21 on their outer sides. The first jacket 21 is provided with a heating medium inlet 22 and a heating medium outlet 23.

[0033] The purification tank 14 is provided with a second jacket 24 on its outer side, and the second jacket 24 is provided with a cooling water inlet 25 and a cooling water outlet 26.

[0034] Furthermore, this embodiment also includes a pulverizer 27 and a sieve 28 connected together, with the material outlet of the sieve 28 connected to the feed inlet of the enzymatic hydrolysis tank 1. Before enzymatic hydrolysis, the particle size of the corn gluten powder is effectively controlled by the pulverizer 27 and the sieve 28, ensuring sufficient contact between the corn gluten powder and the enzyme preparation, thereby improving the enzymatic hydrolysis efficiency.

[0035] Furthermore, in this embodiment, each enzymatic hydrolysis vessel 1 is equipped with an ultrasonic transducer 29, which is connected to an ultrasonic generator 30 outside the enzymatic hydrolysis vessel 1 via a wire. The cavitation effect of ultrasound accelerates the enzyme reaction rate, thereby shortening the enzymatic hydrolysis time and, to a certain extent, reducing enzyme usage and energy consumption.

[0036] Furthermore, in this embodiment, spiral guide plates 31 are provided on the inner walls of the primary extraction tank 6, the secondary extraction tank 8, and the tertiary extraction tank 10.

[0037] Furthermore, in this embodiment, the filtrate outlets of the second plate and frame filter 7, the third plate and frame filter 9, and the fourth plate and frame filter 11 are connected to a pigment solution storage tank 32. This arrangement allows for the recovery of extracted pigments, realizing the resource utilization of by-products, reducing waste emissions, and improving economic efficiency.

[0038] Furthermore, in this embodiment, the enzymatic hydrolysis tank 1, the primary extraction tank 6, the secondary extraction tank 8, the tertiary extraction tank 10, and the dissolving tank 13 are equipped with a stirring device; the stirring device includes a stirring shaft 33, a stirring motor 34 connected to the stirring shaft 33, and stirring blades 35 provided on the stirring shaft 33.

[0039] The process of extracting zein using this system is as follows:

[0040] The corn gluten powder is crushed by the crusher 27 and then sieved by the sieve 28 to obtain corn gluten powder.

[0041] Corn gluten powder is added to enzymatic hydrolysis tank 1, water is added to enzymatic hydrolysis tank 1 through water storage tank 3, the temperature is raised and stirred, and the pH value is adjusted by adding the first pH adjuster. Enzyme preparation is added through enzyme addition port 5 for enzymatic hydrolysis.

[0042] The enzymatic hydrolysate after enzymatic hydrolysis is filtered by the first plate and frame filter 2. The filter residue enters the primary extraction tank 6, where extraction solvent is added, and the mixture is heated and stirred for extraction. After extraction, the mixture is filtered by the second plate and frame filter 7, and the filter residue enters the secondary extraction tank 8. Extraction solvent is added, and the mixture is heated and stirred for extraction. After extraction, the mixture is filtered by the third plate and frame filter 9, and the filter residue enters the tertiary extraction tank 10. Extraction solvent is added, and the mixture is heated and stirred for extraction. After extraction, the mixture is filtered by the fourth plate and frame filter 11. The filtrates from the second, third, and fourth plate and frame filters 7, 9, and 11 are collected and stored in the pigment solution storage tank 32.

[0043] The filter residue from the fourth plate and frame filter press 11 enters the dissolving tank 13, where anhydrous ethanol is added, and the pH value is adjusted by adding a second pH adjuster. The solution is heated and stirred to dissolve, and the resulting solution is slowly added to the purification tank 14 containing cold water. The solution is then concentrated by the concentration tank 15. The concentrated solution is filtered by the fifth plate and frame filter press 16, and the precipitate is dried by the belt dryer 19 before entering the target product storage tank.

[0044] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A system for extracting zein from corn gluten meal, characterized in that: It includes an enzymatic hydrolysis unit, a multi-stage extraction unit, and a purification unit; The enzymatic hydrolysis unit includes an enzymatic hydrolysis tank and a first plate and frame filter. The enzymatic hydrolysis tank is connected to a water storage tank and a first pH adjuster storage tank. The enzymatic hydrolysis tank is also provided with an enzyme addition port. The multi-stage extraction unit includes a primary extraction tank, a second plate and frame filter, a secondary extraction tank, a third plate and frame filter, a tertiary extraction tank, and a fourth plate and frame filter connected in series. The primary extraction tank, the secondary extraction tank, and the tertiary extraction tank are all connected to an extraction solvent storage tank. The feed inlet of the primary extraction tank is connected to the filter residue outlet of the first plate and frame filter. The refining unit includes a dissolving tank, a purification tank, a concentration tank, and a fifth plate and frame filter connected to the filter residue outlet of the fourth plate and frame filter. The dissolving tank is connected to a second pH adjuster storage tank and an anhydrous ethanol storage tank. The filter residue outlet of the fifth plate and frame filter is connected to a belt dryer and a target product storage tank.

2. The system for extracting zein from corn gluten meal according to claim 1, characterized in that: It also includes a connected crusher and a screening machine, wherein the material outlet of the screening machine is connected to the feed inlet of the enzymatic hydrolysis tank.

3. The system for extracting zein from corn gluten meal according to claim 1, characterized in that: The enzymatic hydrolysis vessel is equipped with an ultrasonic transducer, which is connected to an ultrasonic generator outside the enzymatic hydrolysis vessel via a wire.

4. The system for extracting zein from corn gluten meal according to claim 1, characterized in that: Spiral guide plates are provided on the inner walls of the primary extraction tank, secondary extraction tank, and tertiary extraction tank.

5. The system for extracting zein from corn gluten meal according to claim 1, characterized in that: The filtrate outlets of the second, third, and fourth plate and frame filters are connected to pigment solution storage tanks.

6. The system for extracting zein from corn gluten meal according to claim 1, characterized in that: The enzymatic hydrolysis tank, the primary extraction tank, the secondary extraction tank, the tertiary extraction tank, and the dissolution tank are all equipped with a stirring device; the stirring device includes a stirring shaft, a stirring motor connected to the stirring shaft, and stirring blades provided on the stirring shaft.

7. The system for extracting zein from corn gluten meal according to claim 1, characterized in that: The enzymatic hydrolysis tank, primary extraction tank, secondary extraction tank, tertiary extraction tank, and dissolution tank are all equipped with a first jacket on their outer sides. The first jacket is provided with a heating medium inlet and a heating medium outlet.

8. The system for extracting zein from corn gluten meal according to claim 1, characterized in that: The purification tank is provided with a second jacket on its outer side, and the second jacket is provided with a cooling water inlet and a cooling water outlet.

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