Purification system of acid recovery stock solution

Abstract

The utility model provides a purification system of an acid recovery stock solution, and belongs to the technical field of filtration treatment. The problem of poor stability in the prior art is solved. The purification system for the acid recovery stock solution comprises an acid inlet barrel used for storing the purified stock solution, and further comprises a primary filter part, a circulating tank, a secondary filter part and an acid production barrel which are sequentially connected in series through connecting pipes, a first water pump is arranged on a connecting pipe between the circulating groove and the secondary filtering piece, the first water pump can input stock solution in the circulating groove into the secondary filtering piece, the water return pipe is further included, the two ends of the water return pipe are communicated with the secondary filtering piece and the circulating groove respectively, and a second water pump is further arranged on the water return pipe. And the water pump II can input the stock solution in the secondary filter part to the circulating tank. The purification system for the acid recovery stock solution is high in stability.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the filtration treatment technical field relates to a kind of purification systems of acid recovery stock solution. BACKGROUND

[0002] In the anodic oxidation phosphoric acid purification recovery process, the impurities, oil, suspended solids in waste acid cause DUP front-end filter to repeatedly block.

[0003] At the same time, due to the low filtering precision of the filter, pollutants can easily enter the resin system. The main function of the resin is to adsorb metal ions. If small particles, suspended solids and other substances enter the resin system, the resin will be contaminated, affecting the adsorption effect and flux of the resin. The solution is to disassemble and clean the resin. However, the cleaning frequency is too high, the cleaning time is too long, and the maintenance cost is high, which causes great waste of manpower and material resources. SUMMARY

[0004] The utility model aims at the above-mentioned problems existing in the prior art, and provides a purification system for acid recovery stock solution with good applicability and high stability.

[0005] The purpose of the utility model can be achieved by the following technical solutions:

[0006] A purification system for acid recovery stock solution includes an acid inlet bucket for storing purified stock solution. The system is characterized by including a primary filter, a circulating tank, a secondary filter, and an acid production bucket. The acid inlet bucket, primary filter, circulating tank, secondary filter, and acid production bucket are connected in series by connecting pipes. A water pump one is provided on the connecting pipe between the circulating tank and the secondary filter. The water pump one can input the stock solution in the circulating tank into the secondary filter. The system also includes a water return pipe, which is connected to the secondary filter and the circulating tank at both ends. A water pump two is provided on the water return pipe. The water pump two can input the stock solution in the secondary filter into the circulating tank.

[0007] In the above-mentioned purification system for acid recovery stock solution, the primary filter is a safety filter.

[0008] In the above-mentioned purification system for acid recovery stock solution, the secondary filter includes a rigid body and a filter membrane fixed to the body. The body has a through hole on the side, and the filter membrane has micropores that communicate with the through hole.

[0009] In the above-mentioned purification system for acid recovery stock solution, the body is made of PVC material.

[0010] In the above-mentioned purification system for acid recovery stock solution, the filter membrane is made of PVDF material.

[0011] In the above-mentioned purification system for acid recovery stock solution, the filter membrane is made of PEF material.

[0012] In the acid recovery raw solution purification system, the micropore diameter of the filter membrane is 0.01-0.1 μm.

[0013] In the acid recovery raw solution purification system, the circulating tank is further provided with a cleaning inlet pipe and a cleaning outlet pipe, the cleaning inlet pipe is used to introduce clean water into the circulating tank, the cleaning outlet pipe is used to discharge sewage in the circulating tank, and the cleaning inlet pipe and the cleaning outlet pipe are provided with valves respectively.

[0014] In the acid recovery raw solution purification system, the primary filter, the circulating tank, the secondary filter and the water return pipe form a filter unit, two filter units are connected in parallel between the acid inlet barrel and the acid production barrel, the circulating tanks of the two filter units are provided with independent cleaning inlet pipes respectively, and the circulating tanks of the two filter units share a cleaning outlet pipe.

[0015] In the acid recovery raw solution purification system, the acid inlet barrel is provided with an operation valve one and an operation valve two, the operation valve one is used to open and close the acid inlet barrel and one of the filter units, and the operation valve two is used to open and close the acid inlet barrel and the other filter unit.

[0016] Compared with the prior art, the acid recovery raw solution purification system can stably separate the raw solution by the secondary filter, and the separated raw solution can enter the circulating tank and then enter the secondary filter again, so that the raw solution is fully filtered.

[0017] Meanwhile, the whole system has two filter units, when one filter unit is damaged or needs to be repaired, the other filter unit can work normally, so that the system can work continuously, and has good practicability, high stability and high practical value. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a schematic diagram of the acid recovery raw solution purification system.

[0019] Figure 2 is a schematic diagram of the secondary filter in the acid recovery raw solution purification system.

[0020] In the figure, 1 is an acid inlet barrel, 2 is a primary filter, 3 is a circulating tank, 4 is a secondary filter, 4a is a body, 4b is a filter membrane, 5 is an acid production barrel, 6 is a water pump one, 7 is a water return pipe, 8 is a water pump two, 9 is a cleaning inlet pipe, 10 is a cleaning outlet pipe, 11 is an operation valve one, and 12 is an operation valve two. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative efforts fall within the scope of the present application.

[0022] It should be noted that when a component is referred to as being "mounted on" another component, it can be directly mounted on the other component or there can be a middle component. When a component is referred to as being "provided on" another component, it can be directly provided on the other component or there can be a middle component. When a component is referred to as being "fixed on" another component, it can be directly fixed on the other component or there can be a middle component.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terminology used in the description of the present application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0024] As shown in Figure 1 and Figure 2 As shown in the drawings, the purification system of the raw acid recovery solution comprises an acid inlet bucket 1 for storing the purified raw solution, a primary filter 2, a circulating tank 3, a secondary filter 4 and an acid production bucket 5, the acid inlet bucket 1, the primary filter 2, the circulating tank 3, the secondary filter 4 and the acid production bucket 5 are connected in series by connecting pipes, a water pump 1 6 is arranged on the connecting pipe between the circulating tank 3 and the secondary filter 4, the water pump 1 6 can input the raw solution in the circulating tank 3 into the secondary filter 4, the system further comprises a backwater pipe 7, both ends of the backwater pipe 7 are communicated with the secondary filter 4 and the circulating tank 3 respectively, and a water pump 2 8 is arranged on the backwater pipe 7, the water pump 2 8 can input the raw solution in the secondary filter 4 into the circulating tank 3.

[0025] The raw solution after mixing of the chemical polishing solution and the chemical polishing washing water is placed in the acid inlet bucket 1, and the raw solution is filtered by the primary filter 2 and then enters the circulating tank 3.

[0026] Under the action of the water pump 1 6, the raw solution in the circulating tank 3 stably enters the secondary filter 4, and the filtered raw solution enters the acid production bucket 5 under the action of the secondary filter 4.

[0027] Impurities in the secondary filter 4 under the action of the water pump 2 re-enter the circulating tank 3, and the original liquid in the circulating tank 3 enters the secondary filter 4 again for next treatment, so that the original liquid is fully filtered.

[0028] The system is operated for a period of time, and the difficult-to-treat original liquid accumulated in the circulating tank 3 is periodically discharged. The above-mentioned waste liquid is discharged to the sewage pool.

[0029] The primary filter 2 is a security filter.

[0030] The security filter is a device for removing small particles, impurities and other pollutants in fluid, and is widely used in water treatment, food and beverage, pharmaceutical, chemical and other fields.

[0031] The secondary filter 4 includes a rigid body 4a and a filter membrane 4b fixed to the body 4a, and the body 4a has a through hole on the side, and the filter membrane 4b has a micropore communicating with the through hole.

[0032] The body 4a ensures that the entire secondary filter has sufficient strength, and the filter membrane 4b ensures that the entire secondary filter has good filtering effect.

[0033] The body 4a is made of PVC material.

[0034] The body made of PVC material is a widely used thermoplastic material, which can be stably used in the original liquid filtering environment due to its excellent physical and chemical properties.

[0035] The filter membrane 4b is made of PVDF material. According to actual conditions, the filter membrane 4b made of PEF material is also feasible.

[0036] PVDF (Polyvinylidene Fluoride) and PEF (Polyethylene Furanoate) are two different polymer materials, but their surfaces can stably form micropores with small size.

[0037] The diameter of the micropore on the filter membrane 4b is 0.01 μm. According to actual conditions, the diameter of the micropore on the filter membrane 4b is 0.05 μm or 0.07 μm.

[0038] The circulating tank 3 also has a cleaning inlet pipe 9 and a cleaning outlet pipe 10 communicating with the circulating tank 3, the cleaning inlet pipe 9 can introduce clean water into the circulating tank 3, the cleaning outlet pipe 10 can discharge sewage in the circulating tank 3, and the cleaning inlet pipe 9 and the cleaning outlet pipe 10 are provided with valves for opening and closing.

[0039] The clean water introduced by the clean introduction pipe 9 can be discharged to the outside by the clean discharge pipe 10 after entering the circulating tank 3, and the raw liquid accumulated in the circulating tank 3 and difficult to be treated can be discharged to the outside.

[0040] Of course, the corresponding valve needs to be opened during the discharging process. During normal operation, the above-mentioned valve needs to be closed.

[0041] The primary filter 2, the circulating tank 3, the secondary filter 4 and the backwater pipe 7 form a filtering unit, two filtering units are connected in parallel between the acid inlet barrel 1 and the acid production barrel 5, the circulating tanks 3 in the two filtering units each have a respective independent clean introduction pipe 9, and the circulating tanks 3 in the two filtering units share a clean discharge pipe 10.

[0042] The acid inlet barrel 1 and one of the filtering units have an operation valve one 11 capable of being opened and closed, and the acid inlet barrel 1 and the other filtering unit have an operation valve two 12 capable of being opened and closed.

[0043] The two filtering units are independent of each other. When the operation valve one 11 is opened and the operation valve two 12 is closed, one of the filtering units can be used alone. When the above-mentioned used unit needs to be maintained or repaired, the operation valve one 11 is closed, the filtering unit in the operation state before is no longer used for filtering operation, the operation valve two 12 is opened, and the other filtering unit starts the filtering operation.

[0044] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description simple, all possible combinations of the technical features in the above-mentioned embodiments are not described, however, as long as the combination of the technical features does not exist contradictory, it should be considered as the scope of the present application.

[0045] Those skilled in the art should recognize that the above-mentioned embodiments are only used to illustrate the present application, and are not used as a limitation of the present application. Any appropriate changes and variations of the above-mentioned embodiments within the scope of the present application should be considered as falling within the scope of the present application.

Claims

1. A purification system of an acid recovery mother liquor comprising an acid inlet tank (1) for storing a purified mother liquor, characterized in that, The application relates to a filter device for producing acid, which comprises a primary filter (2), a circulating tank (3), a secondary filter (4) and an acid production tank (5), wherein the acid inlet tank (1), the primary filter (2), the circulating tank (3), the secondary filter (4) and the acid production tank (5) are connected in series through connecting pipes, a water pump (6) is arranged on the connecting pipe between the circulating tank (3) and the secondary filter (4), the water pump (6) can input the original liquid in the circulating tank (3) into the secondary filter (4), a backwater pipe (7) is arranged, the two ends of the backwater pipe (7) are communicated with the secondary filter (4) and the circulating tank (3) respectively, and a water pump (8) is arranged on the backwater pipe (7), the water pump (8) can input the original liquid in the secondary filter (4) into the circulating tank (3).

2. The purification system of an acid recovery dope solution according to claim 1, characterized by, The primary filter (2) is a security filter.

3. The purification system of an acid recovery dope solution according to claim 1, characterized by, The secondary filter (4) comprises a rigid body (4a) and a filter membrane (4b) fixed on the body (4a), the body (4a) is provided with a through hole, and the filter membrane (4b) is provided with micropores communicated with the through hole.

4. The purification system of an acid recovery dope according to claim 3, characterized by, The body (4a) is made of PVC material.

5. The purification system of an acid recovery dope solution according to claim 3, characterized by, The filter membrane (4b) is made of PVDF material.

6. The purification system of an acid recovery dope according to claim 3, characterized by, The filter membrane (4b) is made of PEF material.

7. The purification system of an acid recovery dope according to claim 3, characterized by, The diameter of the micropores on the filter membrane (4b) is 0.01-0.1 mu m.

8. The purification system of an acid recovery dope according to claim 1, characterized by, The circulating tank (3) is further provided with a cleaning inlet pipe (9) and a cleaning outlet pipe (10) communicated with the circulating tank (3), the cleaning inlet pipe (9) can introduce clean water into the circulating tank (3), the cleaning outlet pipe (10) can discharge sewage in the circulating tank (3), and the cleaning inlet pipe (9) and the cleaning outlet pipe (10) are provided with valves.

9. The purification system of an acid recovery dope according to claim 1, characterized by, The primary filter (2), the circulating tank (3), the secondary filter (4) and the backwater pipe (7) form a filter unit, two filter units are connected in parallel between the acid inlet tank (1) and the acid production tank (5), the circulating tanks (3) in the two filter units are provided with independent cleaning inlet pipes (9) respectively, and the circulating tanks (3) in the two filter units share one cleaning outlet pipe (10).

10. The purification system of an acid recovery dope according to claim 1, characterized by, The acid inlet tank (1) and one of the filter units are provided with an operation valve (11) capable of being opened and closed, and the acid inlet tank (1) and the other filter unit are provided with an operation valve (12) capable of being opened and closed.

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