A continuous liquid sugar decolorization and purification treatment device

Abstract

The application discloses a kind of liquid sugar continuous decolorization purification treatment device, it is characterized by: purification treatment device is mainly by first reaction tank, second reaction tank, raw water pump, liquid storage tank, silicon carbide membrane system, chemical cleaning system and water production tank composition;Liquid sugar is carried out adsorption reaction with activated carbon powder in first reaction tank, second reaction tank, reaction tank effluent is pumped into silicon carbide membrane system by raw water pump, realize the separation of activated carbon powder, the water production of system enters water production tank, part of concentrated water is recycled again by internal circulating pump through silicon carbide membrane component, part is returned to the front end reaction tank and continues to react, after reaction to certain concentration, discharge to liquid storage tank.The application is extended on the basis of traditional activated carbon adsorption method, increase silicon carbide membrane for solid-liquid separation, improve the utilization rate of powdered activated carbon.The process and device run stably, activated carbon adsorption decolorization capacity is strong, silicon carbide membrane solid retention rate is high, with good water quality, system can be continuously operated, and processing efficiency is high.

Description

TECHNICAL FIELD

[0001] The present application relates to a sugar decolorization technical field, specifically to a liquid sugar continuous decolorization and purification treatment device. BACKGROUND

[0002] Sugar is an indispensable sweetener and nutrient for humans, and the main processing steps of sugar are dissolution, clarification, decolorization, purification, concentration, crystallization, separation, drying and packaging, etc., among which the most important is the decolorization and purification process.

[0003] The commonly used decolorization and purification process at present mainly includes ion exchange method and activated carbon adsorption. The impurities in liquid sugar can be adsorbed by using ion exchange technology, but the filler is expensive, and the pigment is easy to contaminate and cannot be regenerated after use, which has problems of high production cost, great environmental pressure and the like, limiting the use of ion exchange method. Activated carbon has a relatively large specific surface area and rich void structure, and has a strong adsorption effect. The liquid sugar feed liquid also contains a certain amount of impurities such as pigment, protein and odor, which can be removed at the same time in the activated carbon decolorization process, and the advantages are obvious, and the application is relatively common. However, there are many types of activated carbon, and the specific surface area and void differ greatly. The powder activated carbon has obvious advantages compared with the ordinary granular activated carbon, but it is difficult to separate and recycle. At the same time, the previous decolorization operation adopts intermittent production, which needs personnel to operate, and the production efficiency is low, and it is difficult to realize automatic continuous treatment. SUMMARY

[0004] In order to overcome the technical problems existing in the prior art field, the present application provides a sugar decolorization and purification treatment device combined with powder activated carbon adsorption and membrane separation method in view of the deficiencies of the existing activated carbon decolorization process equipment.

[0005] The liquid sugar continuous decolorization and purification treatment device provided by the present application is characterized in that: the decolorization and purification treatment device mainly comprises a first reaction tank, a second reaction tank, an original water pump, a liquid storage tank, a silicon carbide membrane system, a chemical cleaning system and a water production tank; the silicon carbide membrane system comprises a water inlet pipe, a silicon carbide membrane assembly, a water outlet pipe, a concentrated water pipe, an internal circulation pipe, a backwashing pipe and an online backwashing tank, an internal circulation pump is arranged on the internal circulation pipe, the water outlet pipe is connected with the water production tank, and the concentrated water pipe is connected with the reaction tank; the backwashing pipe is connected with the online backwashing tank; the water inlet of the original water pump is connected with the water outlet pipe of the reaction tank, and the water outlet of the original water pump is connected with the liquid storage tank and the water inlet pipe of the silicon carbide membrane system; the chemical cleaning system comprises a chemical cleaning water tank, a chemical cleaning pump, a cleaning water inlet pipe and a cleaning backwater pipe, the water outlet of the cleaning water tank is connected with the chemical cleaning pump, the water outlet of the chemical cleaning pump is connected with the water inlet pipe of the silicon carbide membrane system, and the cleaning backwater pipe is connected with the water outlet pipe and the concentrated water pipe of the silicon carbide membrane system.

[0006] Preferably, the first reaction tank and the second reaction tank have the same structure, the lower part of the tank body is a conical structure, the inside of the tank body is provided with a stirring device and a liquid level meter, the first reaction tank and the second reaction tank are connected through a water outlet pipe, and electric valves are respectively arranged on the water outlet pipe, one tank body is used for reaction, and the other tank body is used for water outlet, so that continuous operation is realized.

[0007] Preferably, electric valves are respectively arranged on the water inlet pipes of the liquid storage tank and the silicon carbide membrane system connected with the raw water pump, and an electric valve is also arranged on the water outlet of the chemical cleaning pump connected with the water inlet pipe of the silicon carbide membrane system, so that automatic control of system operation, liquid discharge and cleaning can be realized.

[0008] Preferably, a concentrated water electric valve, a discharge valve, a chemical cleaning valve, a regulating valve and a concentrated water flow meter are respectively arranged on the concentrated water pipes of the silicon carbide membrane system, and a water production electric valve, a production discharge valve, a chemical cleaning water production electric valve and a water production flow meter are arranged on the water production pipes.

[0009] Preferably, an acid adding system, an alkali adding system and a heating device are arranged on the chemical cleaning water tank, and a temperature table is arranged in the chemical cleaning water tank.

[0010] The present application is based on the traditional activated carbon adsorption method, and the silicon carbide membrane is added for solid-liquid separation, the utilization rate of the powdered activated carbon is improved, and the disadvantages of low process efficiency and unstable water outlet of the original process are improved. The device has the following advantages: the silicon carbide membrane assembly is used, has outstanding anti-pollution performance and excellent chemical stability, can realize stable high flux and low pressure operation under harsh water conditions, can effectively realize solid-liquid separation, and can develop rich cleaning schemes according to the characteristics of pollution factors to restore the membrane flux; the system is stable in operation, the water outlet quality is high, the silicon carbide membrane has obvious separation effect on the activated carbon powder, and the stability of the water outlet is ensured; the device structure is simple, the automation control level is high, and the daily maintenance and cleaning are convenient. BRIEF DESCRIPTION OF DRAWINGS

[0011] ATTACHMENT Figure 1 It is a structural schematic diagram of an embodiment of the application.

[0012] In the diagram, 1. First reaction vessel; 2. Second reaction vessel; 3. Stirring device; 4. Level gauge; 5. Outlet pipe; 6. Electric valve; 7. Raw water pump; 8. Storage tank; 9. Inlet pipe; 10. Silicon carbide membrane module; 11. Product water pipe; 12. Concentrate pipe; 13. Internal circulation pipe; 14. Backwash pipe; 15. Circulation pump; 16. Product water tank; 17. Online backwash tank; 18. Chemical cleaning water tank; 19. Chemical cleaning pump; 20. Cleaning inlet pipe; 21. Cleaning return pipe; 22. Concentrate electric valve; 23. Discharge valve; 24. Chemical cleaning valve; 25. Regulating valve; 26. Flow meter; 27. Product water electric valve; 28. Product discharge valve; 29. ​​Chemical cleaning product water electric valve; 30. Product water flow meter; 31. Acid addition system; 32. Alkali addition system; 33. Heating device; 34. Thermometer.

[0013] Detailed implementation instructions:

[0014] The following is in conjunction with the appendix Figure 1 The specific embodiments of the present invention will be further described below.

[0015] like Figure 1 The liquid sugar continuous decolorization and purification device shown mainly consists of a first reaction tank 1, a second reaction tank 2, a raw water pump 7, a storage tank 8, a silicon carbide membrane system, a chemical cleaning system, and a product water tank 16. The silicon carbide membrane system includes an inlet pipe 9, a silicon carbide membrane module 10, a product water pipe 11, a concentrate pipe 12, an internal circulation pipe 13, a backwash pipe 14, and an online backwash tank 17. An internal circulation pump 15 is installed on the internal circulation pipe 13. The product water pipe 11 is connected to the product water tank 16, the concentrate pipe 12 is connected to the reaction tank, and the backwash pipe 14 is connected to... An online backflushing tank 17 is included. The inlet of the raw water pump 7 is connected to the outlet pipe of the reaction tank, and the outlet of the raw water pump 7 is connected to the storage tank 8 and the inlet pipe 9 of the silicon carbide membrane system, respectively. The chemical cleaning system includes a chemical cleaning water tank 18, a chemical cleaning pump 19, a cleaning inlet pipe 20, and a cleaning return pipe 21. The outlet of the cleaning water tank 18 is connected to the chemical cleaning pump 19, and the outlet of the chemical cleaning pump 19 is connected to the inlet pipe 9 of the silicon carbide membrane system. The cleaning return pipe 21 is connected to the product water pipe 11 and the concentrate pipe 12 of the silicon carbide membrane system, respectively. Electric valves 6 are installed on the raw water pump 7 connecting to the storage tank 8 and the inlet pipe 9 of the silicon carbide membrane system, respectively. An electric valve 6 is also installed on the outlet of the chemical cleaning pump 24 connecting to the inlet pipe 9 of the silicon carbide membrane system, enabling automated control of system operation, drainage, and cleaning. The concentrate pipe 12 of the silicon carbide membrane system is equipped with a concentrate electric valve 22, a discharge valve 23, a chemical cleaning valve 24, a regulating valve 25, and a concentrate flow meter 26. The product water pipe 11 is equipped with a product water electric valve 27, a product water discharge valve 28, a chemical cleaning product water electric valve 29, and a product water flow meter 30. The chemical cleaning water tank 18 is equipped with an acid addition system 31, an alkali addition system 32, and a heating device 33. A thermometer 34 is installed inside the chemical cleaning water tank.

[0016] The working process of the device is that liquid sugar and activated carbon powder carry out adsorption decolorization reaction in the first reaction tank 1 and the second reaction tank 2. The first reaction tank 1 and the second reaction tank 2 are the same in structure, the lower part of the tank body is a conical structure, the inside of the tank body is provided with a stirring device 3 and a liquid level meter 4, the first reaction tank 1 and the second reaction tank 2 are connected through a water outlet pipe 5, and electric valves 6 are respectively arranged on the water outlet pipe. When one reaction tank is carrying out adsorption reaction, the other reaction tank discharges water for subsequent treatment, so that continuous operation is realized. The water discharged from the reaction tank enters the silicon carbide membrane system through a raw water pump 7, so that the activated carbon powder is separated, the produced water of the system enters a produced water tank 16, part of the concentrated water is circulated again through the silicon carbide membrane assembly 10 through an internal circulating pump 15, part of the concentrated water returns to the front-end reaction tank for continuous reaction, and the reaction is discharged to a liquid storage tank 8 after reaching a certain concentration. The silicon carbide membrane assembly 10 needs to be backwashed and chemically cleaned online after a period of operation. The online backwashing tank 17 is backwashed through the backwashing pipe 14 by compressed air to the silicon carbide membrane assembly 10. The chemicals in the chemical cleaning water tank 18 are introduced into the silicon carbide membrane assembly 10 through the cleaning inlet pipe 20 by the chemical cleaning pump 19, and then enter the cleaning return pipe 21 through the produced water pipe 11 and the concentrated water pipe 12, and then return to the chemical cleaning water tank 18. The acid washing and alkali washing are realized through the acid adding system 31 and the alkali adding system 32, the chemical cleaning water tank 18 is heated through the heating system 34 to ensure the cleaning effect.

[0017] The process and device are stable in operation, the activated carbon has strong adsorption decolorization capacity, the solid interception rate of the silicon carbide membrane is greater than 99%, the produced water has good quality, the system can be continuously operated, and the treatment efficiency is high.

[0018] The above are only exemplary embodiments of the present application and are not used to limit the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A continuous decolorization and purification device for liquid sugar, characterized in that: The device is mainly composed of a first reaction tank, a second reaction tank, a raw water pump, a liquid storage tank, a silicon carbide membrane system, a chemical cleaning system and a water production tank; the silicon carbide membrane system comprises a water inlet pipe, a silicon carbide membrane assembly, a water outlet pipe, a concentrated water pipe, an internal circulation pipe, a backwashing pipe and an online backwashing tank, the internal circulation pipe is provided with an internal circulation pump, the water outlet pipe is connected to the water production tank, the concentrated water pipe is connected to the reaction tank, and the backwashing pipe is connected to the online backwashing tank; the water inlet of the raw water pump is connected to the water outlet pipe of the reaction tank, and the water outlet of the raw water pump is connected to the water inlet pipe of the silicon carbide membrane system and the liquid storage tank; the chemical cleaning system comprises a chemical cleaning water tank, a chemical cleaning pump, a cleaning water inlet pipe and a cleaning return water pipe, the water outlet of the chemical cleaning water tank is connected to the chemical cleaning pump, the water outlet of the chemical cleaning pump is connected to the water inlet pipe of the silicon carbide membrane system, and the cleaning return water pipe is connected to the water outlet pipe and the concentrated water pipe of the silicon carbide membrane system; liquid sugar and activated carbon powder are subjected to adsorption and decolorization in the first reaction tank and the second reaction tank, the first reaction tank and the second reaction tank have the same structure, the lower part of the tank body is in a conical structure, the tank body is internally provided with a stirring device and a liquid level meter, the first reaction tank and the second reaction tank are connected through the water outlet pipe, and the water outlet pipe is respectively provided with an electric valve; when one of the reaction tanks is subjected to adsorption, the water outlet of the other reaction tank is subjected to subsequent treatment, continuous operation is realized, the water outlet of the reaction tank is subjected to the raw water pump to enter the silicon carbide membrane system, the activated carbon powder is separated, the water outlet of the system enters the water production tank, part of the concentrated water is subjected to the internal circulation pump to pass through the silicon carbide membrane assembly again, part of the concentrated water returns to the front-end reaction tank to continue to react, and the reaction is discharged to the liquid storage tank after reaching a certain concentration; the water inlet pipe of the raw water pump connected to the liquid storage tank and the silicon carbide membrane system is respectively provided with an electric valve, and the water inlet pipe of the chemical cleaning pump connected to the silicon carbide membrane system is also provided with an electric valve.

2. The liquid sugar continuous decolorization and purification treatment device according to claim 1, characterized in that: According to the liquid sugar continuous decolorization and purification treatment device of claim 1, the concentrated water pipe of the silicon carbide membrane system is respectively provided with a concentrated water electric valve, a discharge valve, a chemical cleaning valve, an adjusting valve and a concentrated water flowmeter, and the water outlet pipe is provided with a water outlet electric valve, a water outlet discharge valve, a chemical cleaning water outlet electric valve and a water outlet flowmeter.

3. The liquid sugar continuous decolorization and purification treatment device according to claim 1, characterized in that: The chemical cleaning water tank is provided with an acid adding system, an alkali adding system and a heating device, and is internally provided with a temperature table.

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