Waste liquid purification system

Abstract

The utility model discloses a waste liquid purification system which comprises a waste liquid storage tank, a first lime preparation tank, a second lime preparation tank, a first neutralization unit, a second neutralization unit and a clear liquid pool, the first neutralization unit is connected with the first lime preparation tank through a first pipeline, and the first neutralization unit is connected with the waste liquid storage tank through a second pipeline and a first valve; the second lime milk preparation tank is connected with the first pipeline through a third pipeline and a first three-way valve; the second neutralization unit is connected with the second lime milk preparation tank through a fourth pipeline, is connected with the first pipeline through a fifth pipeline and a second three-way valve, and is connected with the waste liquid storage tank through a sixth pipeline and a second valve. The treatment efficiency of the waste liquid purification system can be flexibly adjusted.

Description

Technical Field

[0001] The utility model relates to the field of industrial acid and alkali waste liquid treatment, in particular to industrial waste liquid purification equipment. Background Art

[0002] With the development of science and technology, the demand for display devices is increasing day by day, and consumers have higher and higher requirements for thinner and lighter display devices. Taking LCD panels as an example, LCD panel thinning companies have more and more demand for thinning equipment. Therefore, LCD panel thinning equipment has a very broad market. At present, thinning and etching machines are one of the necessary equipment for thinning glass substrates. The waste liquid generated by thinning and etching machines during the thinning and etching process needs to be treated in time, so how to reasonably design the waste liquid purification system is one of the issues that need to be developed. Utility Model Content

[0003] The purpose of the utility model is to provide a waste liquid purification system to solve the above problems.

[0004] In order to achieve the above-mentioned purpose, the utility model provides a waste liquid purification system, which comprises a waste liquid storage tank, a first lime milk configuration tank, a second lime milk configuration tank, a first neutralization unit, a second neutralization unit and a clear liquid tank. The waste liquid storage tank is used to store waste liquid; the first lime milk configuration tank is used to configure lime milk; the first neutralization unit is connected to the first lime milk configuration tank via a first pipeline, and the first neutralization unit is connected to the waste liquid storage tank via a second pipeline and a first valve; the second lime milk configuration tank is used to configure lime milk, and the second lime milk configuration tank is connected to the first pipeline via a third pipeline and a first three-way valve; the second neutralization unit is connected to the second lime milk configuration tank via a fourth pipeline, the second neutralization unit is connected to the first pipeline via a fifth pipeline and a second three-way valve, and the second neutralization unit is connected to the waste liquid storage tank via a sixth pipeline and a second valve; the clear liquid tank is connected to the first neutralization unit and the second neutralization unit.

[0005] In one mode, one of the first valve and the second valve is opened, and one of the first neutralization unit and the second neutralization unit is connected to the waste liquid storage tank and one of the first lime milk configuration tank and the second lime milk configuration tank; in another mode, both the first valve and the second valve are opened, the first neutralization unit is connected to the first lime milk configuration tank and the waste liquid storage tank, and the second neutralization unit is connected to the second lime milk configuration tank and the waste liquid storage tank.

[0006] As an optional technical solution, the clear liquid tank is connected to the first lime milk preparation tank via the seventh pipeline, and the clear liquid tank is connected to the second lime milk preparation tank via the eighth pipeline, and the second lime milk preparation tank is connected to the seventh pipeline via the ninth pipeline and the third three-way valve.

[0007] As an optional technical solution, in the first mode, the first valve is opened, the second valve is closed, the third pipeline is not connected to the first pipeline via the first three-way valve, the fifth pipeline is not connected to the first pipeline via the second three-way valve, the lime milk in the first lime milk configuration tank is transferred to the first neutralization unit via the first pipeline, the waste liquid in the waste liquid storage tank is transferred to the first neutralization unit via the second pipeline to react with the lime milk transferred thereto, and the clean water produced after the reaction is transferred to the clean liquid tank.

[0008] As an optional technical solution, in the second mode, the first valve is opened, the second valve is closed, the third pipeline is connected to the first pipeline via the first three-way valve, the fifth pipeline is not connected to the first pipeline via the second three-way valve, the lime milk in the second lime milk configuration tank is transmitted to the first neutralization unit via the third pipeline and part of the first pipeline, the waste liquid in the waste liquid storage tank is transmitted to the first neutralization unit via the second pipeline to react with the lime milk transmitted thereto, and the clean water produced after the reaction is transmitted to the clean liquid tank.

[0009] As an optional technical solution, in the second mode, the ninth pipeline is connected to the seventh pipeline via the third three-way valve, and the clean water in the clear liquid tank is returned to the second lime milk configuration tank via part of the seventh pipeline and the ninth pipeline; or, in the second mode, the ninth pipeline is not connected to the seventh pipeline via the third three-way valve, and the clean water in the clear liquid tank is returned to the second lime milk configuration tank via the eighth pipeline.

[0010] As an optional technical solution, in the third mode, the first valve is closed, the second valve is opened, the third pipeline is disconnected from the first pipeline via the first three-way valve, the fifth pipeline is connected to the first pipeline via the second three-way valve, the lime milk in the first lime milk configuration tank is transferred to the second neutralization unit via the first pipeline and the fifth pipeline, and the waste liquid in the waste liquid storage tank is transferred to the second neutralization unit via the sixth pipeline to react with the lime milk transferred thereto; or,

[0011] In the fourth mode, the first valve is closed, the second valve is opened, the third pipeline is disconnected from the first pipeline via the first three-way valve, the fifth pipeline is disconnected from the first pipeline via the second three-way valve, the lime milk in the second lime milk configuration tank is transferred to the second neutralization unit via the fourth pipeline, and the waste liquid in the waste liquid storage tank is transferred to the second neutralization unit via the sixth pipeline to react with the lime milk transferred thereto.

[0012] As an optional technical solution, in the fifth mode, the first valve is opened, the second valve is opened, the third pipeline is not connected to the first pipeline via the first three-way valve, the fifth pipeline is not connected to the first pipeline via the second three-way valve, the lime milk in the first lime milk configuration tank is transferred to the first neutralization unit via the first pipeline, the waste liquid in the waste liquid storage tank is transferred to the first neutralization unit via the fifth pipeline to react with the lime milk transferred therein, and at the same time, the lime milk in the second lime milk configuration tank is transferred to the second neutralization unit via the fourth pipeline, and the waste liquid in the waste liquid storage tank is transferred to the second neutralization unit via the sixth pipeline to react with the lime milk transferred therein.

[0013] As an optional technical solution, the first neutralization unit comprises a neutralization tank, a pH adjustment tank, a coagulation tank, a sedimentation tank and a filter press in sequence, and the filter press is connected to the clear liquid tank.

[0014] As an optional technical solution, the structure of the second neutralization unit is the same as that of the first neutralization unit.

[0015] The waste liquid purification system of the utility model, when the amount of waste liquid to be purified is not large, can use one of the first lime milk configuration tank and the second lime milk configuration tank to configure lime milk through the control of the pipeline between the lime milk configuration tank, the neutralization unit, etc., and one of the first neutralization unit and the second neutralization unit receives the configured lime milk and the waste liquid transmitted by the waste liquid storage tank to purify the waste liquid, etc., effectively purifying the waste liquid while reasonably controlling the overall energy consumption of the waste liquid purification system. When the amount of waste liquid to be purified is large, through the control of the pipeline between the lime milk configuration tank, the neutralization unit, etc., the first neutralization unit and the second neutralization unit simultaneously receive the lime milk configured by the corresponding lime milk configuration tank and the waste liquid transmitted by the waste liquid storage tank to purify the waste liquid, etc. In this way, the purification efficiency of the waste liquid purification system can be ensured.

[0016] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments, but is not intended to limit the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the waste liquid purification system of the utility model;

[0018] Figure 2 is a schematic diagram of the waste liquid purification system of the utility model in the first mode;

[0019] Figure 3 is a schematic diagram of the waste liquid purification system of the utility model in the second mode;

[0020] Figure 4 is a schematic diagram of the waste liquid purification system of the present invention in the third mode;

[0021] Figure 5 is a schematic diagram of the waste liquid purification system of the utility model in the fourth mode;

[0022] Figure 6 It is a schematic diagram of the waste liquid purification system of the utility model in the fifth mode. DETAILED DESCRIPTION

[0023] In order to provide a further understanding of the purpose, structure, features and functions of the present invention, the present invention is described in detail below with reference to the embodiments.

[0024] The following descriptions of the embodiments refer to the attached drawings to illustrate specific embodiments of the present invention. The directional terms mentioned in the present invention, such as "upper", "lower", "front", "back", "left", "right", "side", etc., are only with reference to the directions of the attached drawings. Therefore, the directional terms used are used to illustrate and understand the present invention, but not to limit the present invention.

[0025] Please refer to Figure 1 , Figure 1 Schematic diagram of the waste liquid purification system 10 of the utility model. The waste liquid purification system 10 of the utility model comprises a waste liquid storage tank 100, a first lime milk preparation tank 210, a second lime milk preparation tank 220, a first neutralization unit 310, a second neutralization unit 320 and a clear liquid tank 400. The waste liquid storage tank 100 is used to store waste liquid, such as waste acid liquid. The first lime milk configuration tank 210 is used to configure lime milk, the first neutralization unit 310 is connected to the first lime milk configuration tank 210 via the first pipeline P1, and the first neutralization unit 310 is connected to the waste liquid storage tank 100 via the second pipeline P2 and the first valve 110; the second lime milk configuration tank 220 is used to configure lime milk, the second lime milk configuration tank 220 is connected to the first pipeline P1 via the third pipeline P3 and the first three-way valve 410; the second neutralization unit 320 is connected to the second lime milk configuration tank 220 via the fourth pipeline P4, the second neutralization unit 320 is connected to the first pipeline P1 via the fifth pipeline P5 and the second three-way valve 420, and the second neutralization unit 320 is connected to the waste liquid storage tank 100 via the sixth pipeline P6 and the second valve 120; the clear liquid tank 400 is connected to the first neutralization unit 310 and the second neutralization unit 320.

[0026] In the waste liquid purification system 10 of the present invention, in one mode (for example, the amount of waste liquid to be purified is not very large), one of the first valve 110 and the second valve 120 is opened, and at the same time, through the control of the pipeline between the lime milk configuration tank, the neutralization unit, etc., one of the first neutralization unit 310 and the second neutralization unit 320 is connected to the waste liquid storage tank 100 and one of the first lime milk configuration tank 210 and the second lime milk configuration tank 220. At this time, one of the first lime milk configuration tank 210 and the second lime milk configuration tank 220 configures lime milk, and one of the first neutralization unit 310 and the second neutralization unit 320 receives the configured lime milk and the waste liquid transmitted by the waste liquid storage tank 100 to perform waste liquid purification, etc., effectively purifying the waste liquid while reasonably controlling the overall energy consumption of the waste liquid purification system. In another mode (for example, when the amount of waste liquid to be purified is large), the first valve 110 and the second valve 120 are both opened, the first neutralization unit 310 is connected to the first lime milk configuration tank 210 and the waste liquid storage tank 100, and the second neutralization unit 320 is connected to the second lime milk configuration tank 220 and the waste liquid storage tank 100. At this time, the first lime milk configuration tank and the second lime milk configuration tank are simultaneously configuring lime milk, and the first neutralization unit and the second neutralization unit simultaneously receive the lime milk configured by the corresponding lime milk configuration tank and the waste liquid transmitted by the waste liquid storage tank for waste liquid purification, etc., so that the purification efficiency of the waste liquid purification system can be ensured.

[0027] Please refer to Figure 2 , Figure 2 FIG. 1 is a schematic diagram of the waste liquid purification system 10 of the present invention in the first mode. Figure 2 As shown, in the first mode, the first valve 110 is opened, the second valve 120 is closed, the third pipeline P3 is disconnected from the first pipeline P1 via the first three-way valve 410, and the fifth pipeline P5 is disconnected from the first pipeline P1 via the second three-way valve 420. At this time, the second lime milk configuration tank 220 and the second neutralization unit 320 may also be disconnected via the valve. The lime milk in the first lime milk configuration tank 210 is transferred to the first neutralization unit 310 via the first pipeline P1, and the waste liquid in the waste liquid storage tank 100 is transferred to the first neutralization unit 310 via the second pipeline P2 to react with the lime milk transferred therein, and the clean water generated after the reaction is transferred to the clean liquid tank 400.

[0028] In the utility model, Figure 1 As shown, the clear liquid tank 400 is connected to the first lime milk configuration tank 210 via the seventh pipeline P7, and the clear liquid tank 400 is connected to the second lime milk configuration tank 220 via the eighth pipeline P8. The second lime milk configuration tank 220 is connected to the seventh pipeline P7 via the ninth pipeline P9 and the third three-way valve 430. Figure 2As shown, in the first mode, the ninth pipeline P9 is disconnected from the seventh pipeline P7 via the third three-way valve 430, and the second lime milk configuration tank 220 and the clear liquid tank 400 may also be disconnected via the valve. The clean water in the clear liquid tank 400 is returned to the first lime milk configuration tank 210 via the seventh pipeline P7 to participate in the configuration of the lime milk in the first lime milk configuration tank 210.

[0029] Please refer to Figure 3 , Figure 3 FIG. 1 is a schematic diagram of the waste liquid purification system 10 of the present invention in the second mode. Figure 3 As shown, in the second mode, the first valve 110 is opened, the second valve 120 is closed, the third pipeline P3 is connected to the first pipeline P1 via the first three-way valve 410, and the fifth pipeline P5 is disconnected from the first pipeline P1 via the second three-way valve 420. At this time, the first lime milk configuration tank 210 and the first neutralization unit 310 may also be disconnected via the valve. The lime milk in the second lime milk configuration tank 220 is transferred to the first neutralization unit 310 via the third pipeline P3 and part of the first pipeline P1, and the waste liquid in the waste liquid storage tank 100 is transferred to the first neutralization unit 310 via the second pipeline P2 to react with the lime milk transferred therein, and the clean water generated after the reaction is transferred to the clean liquid tank 400.

[0030] Further, such as Figure 3 As shown, in the second mode, the ninth pipeline P9 is connected to the seventh pipeline P7 via the third three-way valve 430, and the clean water in the clear liquid tank 400 is returned to the second lime milk configuration tank 220 via part of the seventh pipeline P7 and the ninth pipeline P9; at the same time, the clear liquid tank 400 is connected to the second lime milk configuration tank 220 via the eighth pipeline P8, and the clean water in the clear liquid tank 400 is returned to the second lime milk configuration tank 220 via the eighth pipeline P8 to participate in the configuration of the lime milk in the second lime milk configuration tank 220. In other embodiments, the ninth pipeline P9 is connected to the seventh pipeline P7 via the third three-way valve 430, and the clean water in the clear liquid tank 400 is returned to the second lime milk configuration tank 220 via part of the seventh pipeline P7 and the ninth pipeline P9; or, the ninth pipeline P9 is not connected to the seventh pipeline P7 via the third three-way valve 430, and at the same time, the seventh pipeline P7 between the clear liquid tank 400 and the first lime milk configuration tank 210 is cut off, and the clean water in the clear liquid tank 400 is returned to the second lime milk configuration tank 220 via the eighth pipeline P8.

[0031] Please refer to Figure 4 , Figure 4 FIG. 1 is a schematic diagram of the waste liquid purification system 10 of the present invention in the third mode. Figure 4As shown, in the third mode, the first valve 110 is closed, the second valve 120 is opened, the third pipeline P3 is disconnected from the first pipeline P1 via the first three-way valve 410, the fifth pipeline P5 is connected to the first pipeline P1 via the second three-way valve 420, the lime milk in the first lime milk configuration tank 210 is transferred to the second neutralization unit 320 via the first pipeline P1 and the fifth pipeline P5, and the waste liquid in the waste liquid storage tank 100 is transferred to the second neutralization unit 320 via the sixth pipeline P6 to react with the lime milk transferred thereto.

[0032] like Figure 4 As shown, in the third mode, the ninth pipeline P9 is disconnected from the seventh pipeline P7 via the third three-way valve 430, and the eighth pipeline P8 between the second lime milk configuration tank 220 and the clear liquid tank 400 can also be disconnected via the valve. The clean water in the clear liquid tank 400 is returned to the first lime milk configuration tank 210 via the seventh pipeline P7 to participate in the configuration of the lime milk in the first lime milk configuration tank 210.

[0033] Please refer to Figure 5 , Figure 5 FIG. 1 is a schematic diagram of the waste liquid purification system 10 of the present invention in the fourth mode. Figure 5 As shown, in the fourth mode, the first valve 110 is closed, the second valve 120 is opened, the third pipeline P3 is disconnected from the first pipeline P1 via the first three-way valve 410, the fifth pipeline P5 is disconnected from the first pipeline P1 via the second three-way valve 420, the lime milk in the second lime milk configuration tank 220 is transferred to the second neutralization unit 320 via the fourth pipeline P4, and the waste liquid in the waste liquid storage tank 100 is transferred to the second neutralization unit 320 via the sixth pipeline P6 to react with the lime milk transferred thereto.

[0034] like Figure 5 As shown, in the second mode, the ninth pipeline P9 is connected to the seventh pipeline P7 via the third three-way valve 430, and the clean water in the clear liquid tank 400 is returned to the second lime milk configuration tank 220 via part of the seventh pipeline P7 and the ninth pipeline P9; at the same time, the clear liquid tank 400 is connected to the second lime milk configuration tank 220 via the eighth pipeline P8, and the clean water in the clear liquid tank 400 is returned to the second lime milk configuration tank 220 via the eighth pipeline P8 to participate in the configuration of the lime milk in the second lime milk configuration tank 220. In other embodiments, the ninth pipeline P9 is connected to the seventh pipeline P7 via the third three-way valve 430, and the clean water in the clear liquid tank 400 is returned to the second lime milk configuration tank 220 via part of the seventh pipeline P7 and the ninth pipeline P9; or, the ninth pipeline P9 is not connected to the seventh pipeline P7 via the third three-way valve 430, and at the same time, the seventh pipeline P7 between the clear liquid tank 400 and the first lime milk configuration tank 210 is cut off, and the clean water in the clear liquid tank 400 is returned to the second lime milk configuration tank 220 via the eighth pipeline P8.

[0035] The waste liquid purification system 10 of the utility model, when the amount of waste liquid to be purified is not large, through the control of the pipeline between the lime milk configuration tank, the neutralization unit, etc., one of the first lime milk configuration tank 210 and the second lime milk configuration tank 220 can be used to configure the lime milk, and one of the first neutralization unit 310 and the second neutralization unit 320 receives the configured lime milk and the waste liquid transmitted by the waste liquid storage tank 100 to perform waste liquid purification treatment (such as neutralization reaction), etc. At this time, the other of the first lime milk configuration tank 210 and the second lime milk configuration tank 220 configures the lime milk, and the other of the first neutralization unit 310 and the second neutralization unit 320 does not participate in the waste liquid purification treatment. That is, the other of the first lime milk configuration tank 210 and the second lime milk configuration tank 220 and the other of the first neutralization unit 310 and the second neutralization unit 320 do not participate in the waste liquid purification process, and the other of the first lime milk configuration tank 210 and the second lime milk configuration tank 220 can be spare, or, machine maintenance can be performed on it at this time to increase the overall service life and purification effect of the waste liquid purification system 10.

[0036] Please refer to Figure 6 , Figure 6 Schematic diagram of the waste liquid purification system 10 of the present invention in the fifth mode. The first valve 110 is opened, the second valve 120 is opened, the third pipeline P3 is disconnected from the first pipeline P1 via the first three-way valve 410, the fifth pipeline P5 is disconnected from the first pipeline P1 via the second three-way valve 420, the lime milk in the first lime milk configuration tank 210 is transferred to the first neutralization unit 310 via the first pipeline P1, the waste liquid in the waste liquid storage tank 100 is transferred to the first neutralization unit 310 via the fifth pipeline P5 to react with the lime milk transferred therein, and at the same time, the lime milk in the second lime milk configuration tank 220 is transferred to the second neutralization unit 320 via the fourth pipeline P4, and the waste liquid in the waste liquid storage tank 100 is transferred to the second neutralization unit 320 via the sixth pipeline P6 to react with the lime milk transferred therein.

[0037] like Figure 6As shown, in the fourth mode, the ninth pipeline P9 is connected to the seventh pipeline P7 via the third three-way valve 430, and the clean water in the clean liquid tank 400 is returned to the second lime milk configuration tank 220 via part of the seventh pipeline P7 and the ninth pipeline P9, and the clean liquid tank 400 is connected to the second lime milk configuration tank 220 via the eighth pipeline P8, and the clean water in the clean liquid tank 400 is returned to the second lime milk configuration tank 220 via the eighth pipeline P8 to participate in the configuration of the lime milk in the second lime milk configuration tank 220 (that is, the clean water can be returned between the clean liquid tank 400 and the second lime milk configuration tank 220 via two pipelines); at the same time, the clean water in the clean liquid tank 400 is returned to the first lime milk configuration tank 210 via the seventh pipeline P7 to participate in the configuration of the lime milk in the first lime milk configuration tank 210. In other embodiments, the clean water can be returned between the clean liquid tank 400 and the second lime milk configuration tank 220 via one pipeline.

[0038] The waste liquid purification system 10 of the utility model, when the amount of waste liquid to be purified is large, through the control of the pipeline between the lime milk configuration tank, the neutralization unit, etc., the first lime milk configuration tank 210 and the second lime milk configuration tank 220 can be used to configure lime milk at the same time, and the first neutralization unit 310 and the second neutralization unit 320 can simultaneously receive the lime milk configured by the corresponding lime milk configuration tank and the waste liquid transmitted by the waste liquid storage tank 100 to perform waste liquid purification (such as neutralization reaction), etc. In this way, the purification efficiency of the waste liquid purification system 10 can be ensured.

[0039] In one embodiment, a liquid level sensor may be provided in the waste liquid storage tank 100. When the sensing value of the liquid level sensor is less than a preset value, the waste liquid purification system 10 may be connected to control each pipeline and select one of the first to fourth modes to operate, so that when the amount of waste liquid to be purified is not large, the waste liquid can be purified in time without causing bottlenecks in the lime milk configuration or neutralization reaction, and the overall energy consumption of the waste liquid purification system can be reasonably controlled; when the sensing value of the liquid level sensor is greater than the preset value, the waste liquid purification system 10 may be connected to control each pipeline and select the fifth mode to operate, so that the spare lime milk configuration tank and the neutralization system in the first to fourth modes can be fully utilized, so that when the amount of waste liquid to be purified is large, the waste liquid can be purified in time.

[0040] In one embodiment, taking the first neutralization unit 310 as an example, it includes a neutralization tank, a pH adjustment tank, a coagulation tank, a sedimentation tank and a filter press in sequence, and the filter press is connected to the clear liquid tank 400. Taking the first mode as an example, the lime milk in the first lime milk configuration tank 210 is transferred to the neutralization tank via the first pipeline P1, and the waste liquid in the waste liquid storage tank 100 is transferred to the neutralization tank via the second pipeline P2, so as to perform an acid-base neutralization reaction in the neutralization tank, and then enter the pH adjustment tank. The pH adjustment tank can detect and adjust the pH of the mixture after the acid-base neutralization reaction until the mixture enters the coagulation tank after the test is qualified. When the test is qualified, the pH of the mixture is, for example, between 6 and 9. After the mixture enters the coagulation tank, flocculants, coagulants, etc. are added to the coagulation tank for mixing and flocculation. The coagulated mixture enters the sedimentation tank for precipitation, wherein the sludge part is pumped to the filter press for dehydration, and the dehydrated mud cake can be collected for subsequent treatment. The clean water in the sedimentation tank and the water generated during the dehydration process of the filter press can be transferred to the clear liquid tank 400, so that the clear liquid tank 400 can return this part of the clean water to the first lime milk configuration tank 210 through a pipeline to participate in the subsequent configuration of lime milk, thereby reducing the industrial new water required in the lime milk configuration process. In one embodiment, the structure of the second neutralization unit 320 is the same as that of the first neutralization unit 310. Therefore, the waste liquid treatment process in each mode is similar, and only the lime milk configuration tank and neutralization system involved in the treatment are different.

[0041] The waste liquid purification system of the utility model, when the amount of waste liquid to be purified is not large, can use one of the first lime milk configuration tank and the second lime milk configuration tank to configure lime milk through the control of the pipeline between the lime milk configuration tank, the neutralization unit, etc., and one of the first neutralization unit and the second neutralization unit receives the configured lime milk and the waste liquid transmitted by the waste liquid storage tank to purify the waste liquid, etc., effectively purifying the waste liquid while reasonably controlling the overall energy consumption of the waste liquid purification system. When the amount of waste liquid to be purified is large, can use the first lime milk configuration tank and the second lime milk configuration tank to configure lime milk at the same time through the control of the pipeline between the lime milk configuration tank, the neutralization unit, etc., and the first neutralization unit and the second neutralization unit simultaneously receive the lime milk configured by the corresponding lime milk configuration tank and the waste liquid transmitted by the waste liquid storage tank to purify the waste liquid, etc. In this way, the purification efficiency of the waste liquid purification system can be ensured. Thus, through the switching of different modes, the processing efficiency of the waste liquid purification system can be flexibly adjusted.

[0042] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, technicians familiar with the field may make various corresponding changes and deformations based on the present invention, but these corresponding changes and deformations should all fall within the scope of protection of the claims attached to the present invention.

Claims

1. A waste liquid purification system, characterized in that Include, A waste liquid storage tank, used for storing waste liquid; The first lime milk preparation tank is used for preparing lime milk; A first neutralization unit is connected to the first lime milk preparation tank via a first pipeline, and the first neutralization unit is connected to the waste liquid storage tank via a second pipeline and a first valve; a second lime milk configuration tank, used for configuring lime milk, the second lime milk configuration tank being connected to the first pipeline via a third pipeline and a first three-way valve; a second neutralization unit connected to the second lime milk preparation tank via a fourth pipeline, the second neutralization unit connected to the first pipeline via a fifth pipeline and a second three-way valve, and the second neutralization unit connected to the waste liquid storage tank via a sixth pipeline and a second valve; and A clear liquid tank connected to the first neutralization unit and the second neutralization unit; In one mode, one of the first valve and the second valve is opened, and one of the first neutralization unit and the second neutralization unit is connected to the waste liquid storage tank and one of the first lime milk configuration tank and the second lime milk configuration tank; in another mode, both the first valve and the second valve are opened, the first neutralization unit is connected to the first lime milk configuration tank and the waste liquid storage tank, and the second neutralization unit is connected to the second lime milk configuration tank and the waste liquid storage tank.

2. The waste liquid purification system according to claim 1, characterized in that: The clear liquid tank is connected to the first lime milk configuration tank via the seventh pipeline, and the clear liquid tank is connected to the second lime milk configuration tank via the eighth pipeline, and the second lime milk configuration tank is connected to the seventh pipeline via the ninth pipeline and the third three-way valve.

3. The waste liquid purification system according to claim 2, characterized in that: In the first mode, the first valve is opened, the second valve is closed, the third pipeline is disconnected from the first pipeline via the first three-way valve, the fifth pipeline is disconnected from the first pipeline via the second three-way valve, the lime milk in the first lime milk configuration tank is transferred to the first neutralization unit via the first pipeline, the waste liquid in the waste liquid storage tank is transferred to the first neutralization unit via the second pipeline to react with the lime milk transferred thereto, and the clean water produced after the reaction is transferred to the clean liquid tank.

4. The waste liquid purification system according to claim 3, characterized in that: In the first mode, the ninth pipeline is disconnected from the seventh pipeline via the third three-way valve, and the clean water in the clean liquid pool is returned to the first lime milk configuration tank via the seventh pipeline.

5. The waste liquid purification system according to claim 4, characterized in that: In the second mode, the first valve is opened, the second valve is closed, the third pipeline is connected to the first pipeline via the first three-way valve, the fifth pipeline is disconnected from the first pipeline via the second three-way valve, the lime milk in the second lime milk configuration tank is transferred to the first neutralization unit via the third pipeline and part of the first pipeline, the waste liquid in the waste liquid storage tank is transferred to the first neutralization unit via the second pipeline to react with the lime milk transferred thereto, and the clean water produced after the reaction is transferred to the clean liquid tank.

6. The waste liquid purification system according to claim 5, characterized in that: In the second mode, the ninth pipeline is connected to the seventh pipeline via the third three-way valve, and the clean water in the clear liquid tank is returned to the second lime milk configuration tank via part of the seventh pipeline and the ninth pipeline; or, in the second mode, the ninth pipeline is not connected to the seventh pipeline via the third three-way valve, and the clean water in the clear liquid tank is returned to the second lime milk configuration tank via the eighth pipeline.

7. The waste liquid purification system according to claim 1, characterized in that: In the third mode, the first valve is closed, the second valve is opened, the third pipeline is disconnected from the first pipeline via the first three-way valve, the fifth pipeline is connected to the first pipeline via the second three-way valve, the lime milk in the first lime milk configuration tank is transferred to the second neutralization unit via the first pipeline and the fifth pipeline, and the waste liquid in the waste liquid storage tank is transferred to the second neutralization unit via the sixth pipeline to react with the lime milk transferred thereto; or, In the fourth mode, the first valve is closed, the second valve is opened, the third pipeline is disconnected from the first pipeline via the first three-way valve, the fifth pipeline is disconnected from the first pipeline via the second three-way valve, the lime milk in the second lime milk configuration tank is transferred to the second neutralization unit via the fourth pipeline, and the waste liquid in the waste liquid storage tank is transferred to the second neutralization unit via the sixth pipeline to react with the lime milk transferred thereto.

8. The waste liquid purification system according to claim 1, characterized in that: In the fifth mode, the first valve is opened, the second valve is opened, the third pipeline is not connected to the first pipeline via the first three-way valve, the fifth pipeline is not connected to the first pipeline via the second three-way valve, the lime milk in the first lime milk configuration tank is transferred to the first neutralization unit via the first pipeline, the waste liquid in the waste liquid storage tank is transferred to the first neutralization unit via the fifth pipeline to react with the lime milk transferred therein, and at the same time, the lime milk in the second lime milk configuration tank is transferred to the second neutralization unit via the fourth pipeline, and the waste liquid in the waste liquid storage tank is transferred to the second neutralization unit via the sixth pipeline to react with the lime milk transferred therein.

9. The waste liquid purification system according to claim 1, characterized in that: The first neutralization unit comprises a neutralization tank, a pH adjustment tank, a coagulation tank, a sedimentation tank and a filter press in sequence, and the filter press is connected to the clear liquid tank.

10. The waste liquid purification system according to claim 9, characterized in that: The structure of the second neutralization unit is the same as that of the first neutralization unit.

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