Corn soaking water recycling device

Abstract

The utility model discloses a corn soaking water recycling device which comprises a primary pulp tank, a silicon carbide ceramic membrane filtration system, a light pulp tank, a continuous ion exchange system, a nanofiltration membrane filtration system, a slurry tank, a concentration tower, a drying tower and a protein storage tank which are communicated with one another, the continuous ion exchange system is also respectively communicated with a desorption agent storage tank and a phytic acid solution storage tank; the silicon carbide ceramic membrane filtering system comprises a first silicon carbide ceramic membrane assembly and a second silicon carbide ceramic membrane assembly which are connected in parallel, a first pneumatic valve and a first pressure gauge are arranged on a connecting pipeline of the first silicon carbide ceramic membrane assembly and the primary pulp tank, and a second pneumatic valve and a second pressure gauge are arranged on a connecting pipeline of the second silicon carbide ceramic membrane assembly and the primary pulp tank; the device further comprises a controller, and the first pneumatic valve, the first pressure gauge, the second pneumatic valve and the second pressure gauge are electrically connected with the controller. According to the device, the corn soaking water is treated, phytic acid and protein are recycled, wastewater in the treatment process is effectively recycled, and reasonable utilization of the corn soaking water is achieved.

Description

Technical Field

[0001] The utility model relates to the field of corn soaking water treatment, in particular to a corn soaking water recycling device. Background Art

[0002] Corn is one of the three major food crops in the world. my country mainly uses it to produce starch. In the corn starch wet production process, sulfurous acid soaking, the washing water in corn transportation, the waste water in protein powder separation, the waste water such as pump cooling water and ground washing water contain a large amount of substances such as starch, protein, sugar, fat, etc., wherein the main waste water is corn soaking water, which is produced when corn is wet processed into starch. Corn soaking water contains a large amount of valuable substances. Corn soaking water does not substantially contain starch. The macromolecular substance therein is mainly protein, which accounts for about half of the dry matter in corn soaking water, and secondly also contains a small amount of sugar, ash. Most starch factories (especially small starch factories) cannot fully develop and utilize corn soaking water, but concentrate a large amount of corn soaking water into corn steep liquor and sell it as feed or directly discharge it, which not only consumes a large amount of heat source, causes the waste of resources and can also cause environmental pollution. Therefore, corn soaking water is a problem that the whole starch industry is in urgent need of solving, and it is also necessary to fully develop and utilize it to reduce its negative impact. Therefore, how to efficiently utilize corn soaking water is a problem that those skilled in the art need to solve. Utility Model Content

[0003] The technical problem to be solved by the utility model is: in view of the deficiencies in the existing technology, a corn soaking water recycling device is provided, which performs a series of treatments on the corn soaking water to recover phytic acid and protein, and the wastewater in the treatment process is also effectively recovered, thereby realizing the rational utilization of the corn soaking water.

[0004] In order to solve the above technical problems, the technical solution of the utility model is:

[0005] A corn soaking water recycling device comprises a connected raw pulp tank, a silicon carbide ceramic membrane filtration system, a dilute pulp tank, a continuous ion exchange system, a nanofiltration membrane filtration system, a slurry tank, a concentration tower, a drying tower and a protein storage tank; the liquid inlet and liquid outlet of the continuous ion exchange system are also connected to an analytical agent storage tank and a phytic acid solution storage tank respectively;

[0006] The silicon carbide ceramic membrane filtration system includes a first silicon carbide ceramic membrane assembly and a second silicon carbide ceramic membrane assembly connected in parallel. The permeate outlets of the first silicon carbide ceramic membrane assembly and the second silicon carbide ceramic membrane assembly are connected to the slurry tank. A first pneumatic valve and a first pressure gauge are respectively provided on the connecting pipes between the first silicon carbide ceramic membrane assembly and the raw slurry tank. A second pneumatic valve and a second pressure gauge are respectively provided on the connecting pipes between the second silicon carbide ceramic membrane assembly and the raw slurry tank. The system also includes a controller. The first pneumatic valve, the first pressure gauge, the second pneumatic valve, the second pressure gauge are electrically connected to the controller.

[0007] Preferably, the intercepted liquid outlets of the first silicon carbide ceramic membrane assembly and the second silicon carbide ceramic membrane assembly are connected to a concentrated slurry tank, and flow meters are provided on the connecting pipes between the first silicon carbide ceramic membrane assembly, the second silicon carbide ceramic membrane assembly and the concentrated slurry tank.

[0008] Preferably, the liquid outlet of the concentrated pulp tank is connected to the liquid inlet of the raw pulp tank.

[0009] Preferably, the continuous ion exchange system comprises at least two ion exchange columns connected in series.

[0010] Preferably, the nanofiltration membrane filtration system includes a plurality of nanofiltration membrane modules connected in series.

[0011] Preferably, the multiple nanofiltration membrane components include a first nanofiltration membrane component, a second nanofiltration membrane component and a third nanofiltration membrane component, the intercepted liquid outlets of the third nanofiltration membrane component, the second nanofiltration membrane component and the third nanofiltration membrane component are connected to the slurry tank, and the permeate outlet of the third nanofiltration membrane component is connected to the recovered water storage tank.

[0012] Preferably, the liquid inlet of the first nanofiltration membrane assembly is also connected to a pure water storage tank.

[0013] Preferably, the gas outlet of the concentration tower is connected to the recovered water storage tank through a condenser.

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

[0015] The utility model provides a corn soaking water recycling device, comprising a connected raw pulp tank, a silicon carbide ceramic membrane filtration system, a thin pulp tank, a continuous ion exchange system, a nanofiltration membrane filtration system, a slurry tank, a concentration tower, a drying tower and a protein storage tank; the liquid inlet and liquid outlet of the continuous ion exchange system are also connected to the analytical agent storage tank and the phytic acid solution storage tank respectively. The above device performs a preliminary sedimentation treatment on the corn soaking water, and then processes it through the silicon carbide ceramic membrane filtration system, the continuous ion exchange system, and the nanofiltration filtration membrane system, and then performs thermal concentration, and finally spray drying, to recover high-value phytic acid and protein products. In the above process, no organic solvent is used, and wastewater discharge can be reduced, which is beneficial to environmental protection and cost control, realizes the reuse of corn soaking water, reduces energy consumption, and improves the economic value of corn soaking water.

[0016] The silicon carbide ceramic membrane filtration system of the present device includes a first silicon carbide ceramic membrane assembly and a second silicon carbide ceramic membrane assembly connected in parallel, the permeate outlets of the first silicon carbide ceramic membrane assembly and the second silicon carbide ceramic membrane assembly being connected to a continuous ion exchange system, a first pneumatic valve and a first pressure gauge being respectively provided on the pipe connecting the first silicon carbide ceramic membrane assembly and the raw pulp tank, and a second pneumatic valve and a second pressure gauge being respectively provided on the pipe connecting the second silicon carbide ceramic membrane assembly and the raw pulp tank, and a controller being electrically connected to the first pneumatic valve, the first pressure gauge, the second pneumatic valve, and the second pressure gauge. The first and second pressure gauges are respectively provided to monitor the pressures in the pipes connecting the first silicon carbide ceramic membrane assembly and the raw pulp tank. If the pressure in the pipe connecting the first silicon carbide ceramic membrane assembly and the raw pulp tank is too high, the first pneumatic valve is closed, the second pneumatic valve is opened, and the feed is switched to the second silicon carbide ceramic membrane assembly, effectively preventing fouling of the silicon carbide ceramic membrane filtration system from affecting the corn soaking water treatment.

[0017] This device uses a silicon carbide ceramic membrane filtration system to treat corn soaking water. The silicon carbide ceramic membrane filtration system has the characteristics of anti-pollution, high temperature resistance, and easy cleaning, which is more environmentally friendly. When in use, it can adopt cross-flow filtration, micro-cross-flow filtration or dead-end filtration operation mode, which has obvious advantages in product filtration. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 This is a schematic structural diagram of Example 1 of the present utility model;

[0020] In the figure, 1. raw pulp tank; 2. thin pulp tank; 3. ion exchange column; 4. slurry tank; 5. concentration tower; 6. drying tower; 7. protein storage tank; 8. analytical agent storage tank; 9. phytic acid solution storage tank; 10. first silicon carbide ceramic membrane assembly; 11. second silicon carbide ceramic membrane assembly; 12. first pneumatic valve; 13. first pressure gauge; 14. second pneumatic valve; 15. second pressure gauge; 16. controller; 17. thick pulp tank; 18. flow meter; 19. first nanofiltration membrane assembly; 20. second nanofiltration membrane assembly; 21. third nanofiltration membrane assembly; 22. recovered water storage tank; 23. pure water storage tank; 24. condenser. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0022] Example 1

[0023] like Figure 1 As shown, a corn soaking water recycling device includes a connected raw pulp tank 1, a silicon carbide ceramic membrane filtration system, a dilute pulp tank 2, a continuous ion exchange system, a nanofiltration membrane filtration system, a slurry tank 4, a concentration tower 5, a drying tower 6 and a protein storage tank 7; the liquid inlet and liquid outlet of the continuous ion exchange system are also connected to an analytical agent storage tank 8 and a phytic acid solution storage tank 9 respectively;

[0024] The silicon carbide ceramic membrane filtration system includes a first silicon carbide ceramic membrane assembly 10 and a second silicon carbide ceramic membrane assembly 11 connected in parallel. The permeate outlets of the first silicon carbide ceramic membrane assembly 10 and the second silicon carbide ceramic membrane assembly 11 are connected to the slurry tank 2. The connecting pipes between the first silicon carbide ceramic membrane assembly 10 and the raw slurry tank 1 are respectively provided with a first pneumatic valve 12 and a first pressure gauge 13. The connecting pipes between the second silicon carbide ceramic membrane assembly 11 and the raw slurry tank 1 are respectively provided with a second pneumatic valve 14 and a second pressure gauge 15. It also includes a controller 16. The first pneumatic valve 12, the first pressure gauge 13, the second pneumatic valve 14, the second pressure gauge 15 and the controller 16 are electrically connected.

[0025] In the above scheme, the raw pulp tank 1 performs primary sedimentation treatment on the corn soaking water in the tank. The supernatant after treatment is clarified by the silicon carbide ceramic membrane filtration system. The permeate of the silicon carbide ceramic membrane filtration system enters the thin pulp tank 2. The clear liquid in the thin pulp tank 2 is treated by phytic acid adsorption by the continuous ion exchange system. The effluent during the adsorption process is filtered again by the silicon carbide ceramic membrane filtration system. The intercepted liquid enters the slurry tank 4, is concentrated by the concentration tower 5, and then enters the drying tower 6 for drying. The obtained corn protein powder enters the protein storage tank 7 for storage. The continuous ion exchange system with adsorbed phytic acid uses the analytical agent in the analytical agent storage tank 8 for analytical treatment. The phytate solution obtained after analytical treatment enters the phytic acid solution storage tank 9.

[0026] In the above scheme, when the silicon carbide ceramic membrane filtration system is used for filtration, the supernatant in the raw pulp tank 1 enters the first silicon carbide ceramic membrane assembly 10 for filtration, and the opening and closing of the first pneumatic valve 12 is controlled by the controller 16. The first pressure gauge 13 monitors the pressure in the pipeline in real time. If the pressure in the pipeline is too high, the first pressure gauge 13 transmits a signal to the controller 16. The controller 16 controls the closing of the first pneumatic valve 12 and the opening of the second pneumatic valve 14. The supernatant in the raw pulp tank 1 enters the second silicon carbide ceramic membrane assembly 11 for treatment, thereby avoiding the occurrence of blockage during filtration that affects the efficiency of corn soaking water treatment.

[0027] In this embodiment, the intercepted liquid outlets of the first and second silicon carbide ceramic membrane assemblies 10, 11 are connected to a concentrate tank 17. Flowmeters 18 are installed on the connecting pipes between the first and second silicon carbide ceramic membrane assemblies 10, 11, and the concentrate tank 17. The liquid outlet of the concentrate tank 17 is connected to the liquid inlet of the raw pulp tank 1. The intercepted liquid from the silicon carbide ceramic membrane filtration system enters the concentrate tank 17 and then enters the raw pulp tank 1 for further treatment, improving the treatment effect of the corn soaking water.

[0028] In this embodiment, the continuous ion exchange system includes at least two ion exchange columns 3 connected in series to improve the phytic acid adsorption effect.

[0029] In this embodiment, the nanofiltration membrane filtration system includes a plurality of nanofiltration membrane modules connected in series.

[0030] In this embodiment, the multiple nanofiltration membrane assemblies include a first nanofiltration membrane assembly 19, a second nanofiltration membrane assembly 20, and a third nanofiltration membrane assembly 21. The intercepted liquid outlets of the third nanofiltration membrane assembly 21, the second nanofiltration membrane assembly 20, and the third nanofiltration membrane assembly 21 are connected to the slurry tank 4, and the permeate outlet of the third nanofiltration membrane assembly 21 is connected to the recovered water storage tank 22. The liquid inlet of the first nanofiltration membrane assembly 19 is also connected to the pure water storage tank 23. The arrangement of multiple nanofiltration membrane assemblies further provides a clarification effect. The permeate and membrane cleaning liquid during the nanofiltration process enter the recovered water storage tank 22 for recycling.

[0031] In this embodiment, the gas outlet of the concentration tower 5 is connected to the recovery water storage tank 22 through the condenser 24. The steam generated during the concentration process is condensed by the condenser 24 and then enters the recovery water storage tank 22 for recycling.

[0032] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one 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 limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A corn soaking water recycling device, characterized by: It includes a connected raw pulp tank, a silicon carbide ceramic membrane filtration system, a thin pulp tank, a continuous ion exchange system, a nanofiltration membrane filtration system, a slurry tank, a concentration tower, a drying tower and a protein storage tank; the liquid inlet and liquid outlet of the continuous ion exchange system are also connected to the analytical agent storage tank and the phytic acid solution storage tank respectively; The silicon carbide ceramic membrane filtration system includes a first silicon carbide ceramic membrane assembly and a second silicon carbide ceramic membrane assembly connected in parallel. The permeate outlets of the first silicon carbide ceramic membrane assembly and the second silicon carbide ceramic membrane assembly are connected to the slurry tank. A first pneumatic valve and a first pressure gauge are respectively provided on the connecting pipes between the first silicon carbide ceramic membrane assembly and the raw slurry tank. A second pneumatic valve and a second pressure gauge are respectively provided on the connecting pipes between the second silicon carbide ceramic membrane assembly and the raw slurry tank. The system also includes a controller. The first pneumatic valve, the first pressure gauge, the second pneumatic valve, the second pressure gauge are electrically connected to the controller.

2. The corn soaking water recycling device according to claim 1, characterized in that: The intercepted liquid outlets of the first silicon carbide ceramic membrane assembly and the second silicon carbide ceramic membrane assembly are connected to a concentrated slurry tank, and flow meters are provided on the connecting pipes between the first silicon carbide ceramic membrane assembly, the second silicon carbide ceramic membrane assembly and the concentrated slurry tank.

3. The corn soaking water recycling device according to claim 2, characterized in that: The liquid outlet of the thick pulp tank is communicated with the liquid inlet of the raw pulp tank.

4. The corn soaking water recycling device according to claim 1, characterized in that: The continuous ion exchange system includes at least two ion exchange columns connected in series.

5. The corn soaking water recycling device according to claim 1, characterized in that: The nanofiltration membrane filtration system includes a plurality of nanofiltration membrane modules connected in series.

6. The corn soaking water recycling device according to claim 5, characterized in that: The multiple nanofiltration membrane assemblies include a first nanofiltration membrane assembly, a second nanofiltration membrane assembly and a third nanofiltration membrane assembly. The intercepted liquid outlets of the third nanofiltration membrane assembly, the second nanofiltration membrane assembly and the third nanofiltration membrane assembly are connected to the slurry tank, and the permeate outlet of the third nanofiltration membrane assembly is connected to the recovered water storage tank.

7. The corn soaking water recycling device according to claim 6, characterized in that: The liquid inlet of the first nanofiltration membrane assembly is also connected to a pure water storage tank.

8. The corn soaking water recycling device according to claim 6, characterized in that: The gas outlet of the concentration tower is communicated with the recovered water storage tank through a condenser.

Images