Comprehensive utilization device for corn soaking water

Abstract

The utility model discloses a comprehensive utilization device for corn soaking water, which comprises a ceramic membrane filter, a settling tank, a centrifugal machine, a first concentration tank, a first crystallizing tank and a first plate-and-frame filter, and a filtrate outlet of the first plate-and-frame filter is sequentially communicated with a buffer tank and an electrodialyzer. A protein liquid outlet of the electrodialyzer is communicated with the second concentration tank, the spray dryer and the protein storage tank; a salt phase outlet of the electrodialyzer is communicated with a reverse osmosis membrane, a third concentration tank, a second crystallizing tank, a second plate and frame filter, a first drying tank and a potassium chloride storage tank. The device can effectively recover lactic acid, protein and potassium chloride in the corn soaking water, and effectively improves the economic value of the corn soaking water.

Description

Technical Field

[0001] This utility model relates to the field of chemical equipment technology, specifically to a device for the comprehensive utilization of corn soaking water. Background Technology

[0002] Corn soaking water is a byproduct of corn starch processing. Its main components are soluble corn proteins and their degradation products (such as peptides and various amino acids), as well as lactic acid, plant calcium and magnesium salts, and soluble sugars. Corn steep liquor is rich in nutrients; however, ineffective treatment not only wastes resources but also pollutes the environment. To turn waste into treasure, enterprises need to deeply develop the resources of corn soaking water. Calcium phytate in corn soaking water can be used as a raw material to prepare inositol, which has wide applications in the pharmaceutical, food, textile, and printing industries. Therefore, corn soaking water is often used to prepare inositol. This process generates a large amount of phytate removal wastewater containing certain amounts of protein, metal ions, lactic acid, and other substances. Direct discharge without treatment will not only waste resources but also pollute the environment. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a comprehensive utilization device for corn soaking water, which can effectively recover lactic acid, protein and potassium chloride in corn soaking water, thereby effectively improving the economic value of corn soaking water.

[0004] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0005] A comprehensive utilization device for corn soaking water includes a ceramic membrane filter, a sedimentation tank, a centrifuge, a first concentration tank, a first crystallization tank, and a first plate and frame filter. The filtrate outlet of the first plate and frame filter is sequentially connected to a buffer tank and an electrodialysis unit. The protein outlet of the electrodialysis unit is connected to a second concentration tank, a spray dryer, and a protein storage tank. The salt phase outlet of the electrodialysis unit is connected to a reverse osmosis membrane, a third concentration tank, a second crystallization tank, a second plate and frame filter, a first drying tank, and a potassium chloride storage tank.

[0006] Preferably, the precipitation tank is connected to the tartaric acid storage tank and the potassium hydroxide solution storage tank.

[0007] Preferably, the sedimentation tank is provided with a jacket on its outer side, and the jacket is provided with a condensate inlet and a condensate outlet.

[0008] Preferably, the buffer tank is connected to a water storage tank.

[0009] Preferably, the filter cake outlet of the first plate and frame filter is connected to the second drying tank and the lactic acid storage tank.

[0010] Preferably, the first, second, and third concentration tanks are equipped with steam coils, and the steam coils are equipped with heat dissipation fins.

[0011] Preferably, the first concentration tank, the second concentration tank, and the third concentration tank are equipped with a first stirring device, and the steam coil is sleeved on the outside of the first stirring device.

[0012] Preferably, the first drying tank and the second drying tank are equipped with a second stirring device. The second stirring device includes a hollow stirring shaft and a stirring motor that drives the hollow stirring shaft to rotate. The hollow stirring shaft is connected to multiple hollow stirring rods, and multiple air outlets are connected to the hollow stirring rods. The hollow stirring shaft is connected to a steam storage tank through a rotary joint.

[0013] Preferably, the end of the air outlet is closed, and multiple air outlets are provided on the side wall of the air outlet.

[0014] Due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0015] This invention provides a comprehensive utilization device for corn soaking water, comprising a ceramic membrane filter, a sedimentation tank, a centrifuge, a first concentration tank, a first crystallization tank, and a first plate and frame filter. The filtrate outlet of the first plate and frame filter is sequentially connected to a buffer tank and an electrodialysis unit. The protein outlet of the electrodialysis unit is connected to a second concentration tank, a spray dryer, and a protein storage tank. The salt phase outlet of the electrodialysis unit is connected to a reverse osmosis membrane, a third concentration tank, a second crystallization tank, a second plate and frame filter, a first drying tank, and a potassium chloride storage tank. This device effectively treats and recovers protein and potassium chloride from corn soaking water, thereby improving the utilization rate of corn soaking water.

[0016] The precipitation tank of this device is connected to the tartaric acid storage tank and the potassium hydroxide solution storage tank. The pH of the corn soaking water is adjusted by the potassium hydroxide solution. At a certain pH, the tartaric acid complexes with the calcium and magnesium ions in the corn soaking water and precipitates, thereby removing the calcium and magnesium ions from the corn soaking water.

[0017] The filter cake outlet of the first plate and frame filter press in this device is connected to the second drying tank and the lactic acid storage tank. After removing calcium and magnesium ions, the lactic acid in the solution is crystallized out under certain crystallization conditions.

[0018] The first, second, and third concentration tanks of this device are equipped with steam coils, and the steam coils are equipped with heat dissipation fins. The above configuration greatly improves the heat exchange efficiency, thereby improving the concentration efficiency.

[0019] The first and second drying tanks of this device are equipped with a second stirring device, which includes a hollow stirring shaft and a stirring motor that drives the hollow stirring shaft to rotate. The hollow stirring shaft is connected to multiple hollow stirring rods, and multiple air outlets are connected to the hollow stirring rods. The hollow stirring shaft is connected to a steam storage tank through a rotary joint. The above configuration heats the liquid material while stirring, resulting in high drying efficiency and thus improving product production efficiency. Attached Figure Description

[0020] 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.

[0021] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of this utility model;

[0022] Figure 2 yes Figure 1 Enlarged structural diagram at point A;

[0023] Figure 3 yes Figure 1 Enlarged structural diagram at point B;

[0024] In the diagram, 1. Ceramic membrane filter; 2. Sedimentation tank; 3. Tartaric acid storage tank; 4. Potassium hydroxide solution storage tank; 5. Centrifuge; 6. First concentration tank; 7. First crystallization tank; 8. First plate and frame filter press; 9. Buffer tank; 10. Electrodialysis unit; 11. Second concentration tank; 12. Spray dryer; 13. Protein storage tank; 14. Reverse osmosis membrane; 15. Third concentration tank; 16. Second crystallization tank; 17. Second plate and frame filter press; 18. First... 19. Potassium chloride storage tank; 20. Jacket; 21. Condensate inlet; 22. Condensate outlet; 23. Water storage tank; 24. Second drying tank; 25. Lactic acid storage tank; 26. Steam coil; 27. Heat dissipation fins; 28. First stirring device; 29. ​​Second stirring device; 30. Hollow stirring shaft; 31. Stirring motor; 32. Hollow stirring rod; 33. Air outlet; 34. Rotary joint; 35. Steam storage tank; 36. Air outlet. Detailed Implementation

[0025] 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.

[0026] Example 1

[0027] like Figures 1 to 3 As shown, a comprehensive utilization device for corn soaking water includes a ceramic membrane filter 1 and a sedimentation tank 2. The sedimentation tank 2 is connected to a tartaric acid storage tank 3 and a potassium hydroxide solution storage tank 4. The feed outlet of the sedimentation tank 2 is sequentially connected to a centrifuge 5, a first concentration tank 6, a first crystallization tank 7, and a first plate and frame filter 8. The filtrate outlet of the first plate and frame filter 8 is sequentially connected to a buffer tank 9 and an electrodialysis unit 10. The protein outlet of the electrodialysis unit 10 is connected to a second concentration tank 11, a spray dryer 12, and a protein storage tank 13. The salt phase outlet of the electrodialysis unit 10 is connected to a reverse osmosis membrane 14, a third concentration tank 15, a second crystallization tank 16, a second plate and frame filter 17, a first drying tank 18, and a potassium chloride storage tank 19.

[0028] With the above setup, this device uses multiple methods such as membrane purification, electrodialysis, and crystallization purification to treat the corn soaking water after phytate removal, thereby effectively recovering protein and potassium chloride, and making comprehensive use of the corn soaking water.

[0029] In this embodiment, the sedimentation tank 2 is provided with a jacket 20 on its outer side, and the jacket 20 is provided with a condensate inlet 21 and a condensate outlet 22. By introducing condensate into the sedimentation tank 2, the sedimentation temperature is effectively regulated, ensuring that calcium and magnesium ions in the corn soaking water are effectively removed, which facilitates the subsequent separation of protein.

[0030] In this embodiment, the buffer tank 9 is connected to the water storage tank 23. The protein solution after lactic acid separation is diluted with water before desalination to facilitate subsequent electrodialysis removal of potassium chloride.

[0031] In this embodiment, the filter cake outlet of the first plate and frame filter 8 is connected to the second drying tank 24 and the lactic acid storage tank 25. Through the second drying tank 24 and the lactic acid storage tank 25, the lactic acid in the corn soaking water is effectively recovered.

[0032] In this embodiment, the first concentration tank 6, the second concentration tank 11, and the third concentration tank 15 are equipped with steam coils 26, and the steam coils 26 are equipped with heat dissipation fins 27. The arrangement of the steam coils 26 and the heat dissipation fins 27 can greatly improve the heat exchange efficiency, thereby improving the concentration efficiency.

[0033] In this embodiment, the first concentration tank 6, the second concentration tank 11, and the third concentration tank 15 are equipped with a first stirring device 28, and the steam coil 26 is sleeved on the outside of the first stirring device 28. The structure of the first stirring device 28 is a conventional configuration in the art, and therefore will not be described in detail here.

[0034] In this embodiment, a second stirring device 29 is provided inside the first drying tank 18 and the second drying tank 24. The second stirring device 29 includes a hollow stirring shaft 30 and a stirring motor 31 that drives the hollow stirring shaft 30 to rotate. The hollow stirring shaft 30 is connected to multiple hollow stirring rods 32, and multiple air outlets 33 are connected to the hollow stirring rods 32. The hollow stirring shaft 30 is connected to a steam storage tank 35 through a rotary joint 34. The end of the air outlet 33 is closed, and multiple air outlets 36 are provided on the side wall of the air outlet 33. The above configuration ensures drying efficiency and improves product production efficiency.

[0035] 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 device for comprehensive utilization of corn soaking water, characterized in that: The system comprises a ceramic membrane filter, a precipitation tank, a centrifuge, a first concentration tank, a first crystallization tank, a first plate-and-frame filter, a filtrate outlet of the first plate-and-frame filter is connected with a buffer tank and an electrodialyzer in sequence, a protein liquid outlet of the electrodialyzer is connected with a second concentration tank, a spray dryer and a protein storage tank, and a salt phase outlet of the electrodialyzer is connected with a reverse osmosis membrane, a third concentration tank, a second crystallization tank, a second plate-and-frame filter, a first drying tank and a potassium chloride storage tank.

2. The corn steep water comprehensive utilization device according to claim 1, characterized in that: The precipitation tank is connected with a tartaric acid storage tank and a potassium hydroxide solution storage tank.

3. The corn steep water comprehensive utilization device according to claim 1, characterized in that: A jacket is arranged outside the precipitation tank, and a condensate inlet and a condensate outlet are arranged on the jacket.

4. The corn steep water comprehensive utilization device according to claim 1, characterized in that: The buffer tank is connected with a water storage tank.

5. The corn steep water comprehensive utilization device according to claim 1, characterized in that: A filter cake outlet of the first plate-and-frame filter is connected with a second drying tank and a lactic acid storage tank.

6. The corn steep water comprehensive utilization device according to claim 1, characterized in that: Steam coils are arranged in the first concentration tank, the second concentration tank and the third concentration tank, and the steam coils are provided with heat dissipation fins.

7. The corn steep water comprehensive utilization device according to claim 6, characterized in that: First stirring devices are arranged in the first concentration tank, the second concentration tank and the third concentration tank, and the steam coils are arranged outside the first stirring devices.

8. The corn steep water comprehensive utilization device according to claim 5, characterized in that: Second stirring devices are arranged in the first drying tank and the second drying tank, the second stirring devices comprise hollow stirring shafts and stirring motors for driving the hollow stirring shafts to rotate, the hollow stirring shafts are connected with a plurality of hollow stirring rods, the hollow stirring rods are connected with a plurality of air outlets, and the hollow stirring shafts are connected with a steam storage tank through rotary joints.

9. The corn steepwater integrated utilization device according to claim 8, characterized in that: Ends of the air outlets are closed, and a plurality of air outlets are arranged on side walls of the air outlets.

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