Silicon-containing wastewater recycling device

Abstract

The utility model relates to the technical field of waste water recycling equipment, in particular to a silicon-containing waste water recycling device which comprises a recycling module, a solid-liquid separation module and a circulation module which are sequentially arranged, the recycling module comprises a PH adjusting tank and a coagulation reaction tank, a delivery pump is arranged between the PH adjusting tank and the coagulation reaction tank, and the solid-liquid separation module is connected with the circulation module. The solid-liquid separation module comprises a sedimentation tank, an overflow tank is arranged at the upper part of the sedimentation tank, a sludge discharge device is arranged at the bottom of the sedimentation tank, a plate filter press is arranged at the discharge end of the sludge discharge device, the circulating module comprises a recycling water tank communicated with the overflow tank, and a circulating pipeline extending to a cutting workshop is arranged in the recycling water tank.

Description

Technical Field

[0001] The utility model relates to the technical field of wastewater recycling equipment, and particularly relates to a device for recycling and reusing silicon-containing wastewater for slicing silicon wafers or silicon cores. Background Art

[0002] With the rapid development of industries such as semiconductors, photovoltaics, and electronics, the discharge of silicon-containing wastewater has increased significantly. This wastewater mainly comes from the processes of slicing, grinding, and cleaning silicon wafers, and contains a large amount of pollutants such as silicon powder, suspended solids, organic matter, and heavy metals. It is characterized by a high silicon content, high turbidity, and difficulty in precipitation. Traditional wastewater treatment methods often struggle to effectively remove silicon compounds and other harmful substances in the wastewater, resulting in a serious threat to the environment and human health when the wastewater is directly discharged.

[0003] At present, there are already various silicon-containing wastewater treatment devices and technologies on the market, but most of them focus on a single treatment stage or method, such as physical precipitation, chemical coagulation, biological degradation, etc., and it is difficult to comprehensively and efficiently treat the complex and variable silicon-containing wastewater. In addition, these devices often have problems such as high energy consumption, low treatment efficiency, and high operating costs during the treatment process, which limits their wide application in industrial production.

[0004] In view of the above problems, this patent proposes a device for recycling and reusing silicon-containing wastewater, which aims to effectively recycle and reuse the cutting cooling water through an integrated treatment process and improve the utilization rate of water resources. Summary of the Utility Model

[0005] To solve the above problems, an embodiment of the utility model provides a device for recycling and reusing silicon-containing wastewater that can recycle cutting water.

[0006] The embodiment of the utility model specifically adopts the following technical solutions to achieve the above purpose: A device for recycling and reusing silicon-containing wastewater includes a recovery module, a solid-liquid separation module, and a circulation module arranged in sequence. The recovery module includes a pH adjustment tank and a coagulation reaction tank, and a transfer pump is arranged between the pH adjustment tank and the coagulation reaction tank. The solid-liquid separation module includes a sedimentation tank, an overflow trough is arranged at the upper part of the sedimentation tank, and a sludge discharge device is arranged at the bottom. The discharge end of the sludge discharge device is provided with a plate and frame filter press. The circulation module includes a recovery water tank communicated with the overflow trough, and a circulation pipeline extending to the cutting workshop is arranged in the recovery water tank.

[0007] As a further improvement of the above technical solution:

[0008] An aeration and agitation system, a liquid level gauge, and a pH tester are arranged in the pH adjustment tank.

[0009] The aeration and agitation system includes a booster pump and an air distribution pipe group. The air distribution pipe group includes an annular pipe connected to the booster pump. A shunt pipe is arranged at the lower part of the annular pipe, and a positioning ring pipe connected to the shunt pipe is arranged at the bottom of the pH adjustment tank.

[0010] The annular pipe, the positioning ring pipe and the pH adjustment tank are concentrically distributed and their diameters gradually increase. The annular pipe is located at the middle position in the upper part of the pH adjustment tank.

[0011] The number of the shunt pipes is multiple and they are evenly distributed along the circumferential direction of the annular pipe. Aeration holes are arranged on the inner side wall and the outer side wall of each shunt pipe.

[0012] The shunt pipes are installed obliquely and are distributed in an S shape.

[0013] A drain trough connected to the recovery water tank is arranged below the plate filter press.

[0014] The beneficial effects of the embodiment of the present utility model are as follows: 1. The silicon-containing wastewater recycling and reuse device includes a recovery module, a solid-liquid separation module and a circulation module arranged in sequence. The recovery module includes a pH adjustment tank and a coagulation reaction tank. A transfer pump is arranged between the pH adjustment tank and the coagulation reaction tank. The solid-liquid separation module includes a sedimentation tank. An overflow trough is arranged at the upper part of the sedimentation tank, and a sludge discharge device is arranged at the bottom. The discharge end of the sludge discharge device is provided with a plate filter press. The circulation module includes a recovery water tank communicated with the overflow trough, and a circulation pipeline extending to the cutting workshop is arranged in the recovery water tank.

[0015] 2. The aeration and agitation system includes a booster pump and an air distribution pipe group. The air distribution pipe group includes an annular pipe connected to the booster pump. A shunt pipe is arranged at the lower part of the annular pipe, and a positioning ring pipe connected to the shunt pipe is arranged at the bottom of the pH adjustment tank. A connecting pipe is arranged between the annular pipe and the booster pump. A medicine injection pipe is installed in the middle of the connecting pipe, and the other end of the medicine injection pipe is connected with a flow pump. Through the medicine injection pipe, lactic acid can be added into the pH adjustment tank by using the aeration and agitation system. Compared with the conventional method of adding lactic acid separately and then using the aeration and agitation system to stir and mix the materials, the materials can be evenly mixed during the addition process, so that the materials are more evenly distributed in the pH adjustment tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a flow block diagram of the present utility model;

[0017] Figure 2 is a structure distribution diagram of the present utility model;

[0018] Figure 3 is a structural schematic diagram of the pH adjustment tank in the present utility model;

[0019] Figure 4It is the sectional view of the PH adjustment tank in the utility model;

[0020] Figure 5 It is the structural schematic diagram of the shunt pipe in Embodiment 2.

[0021] In the figure: 1. PH adjustment tank; 2. Coagulation reaction tank; 3. Sedimentation tank; 4. Overflow trough; 5. Plate filter press; 6. Recycling water tank; 7. Circulation pipeline; 8. Liquid level gauge; 9. PH tester; 10. Booster pump; 11. Annular pipe; 12. Shunt pipe; 13. Positioning ring pipe; 14. Aeration hole; 15. Drainage trough; 16. Connecting pipe; 17. Chemical injection pipe; 18. Flow pump. Specific embodiments

[0022] The preferred embodiments of the present utility model will be described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principle of the present utility model and are not intended to limit the protection scope of the present utility model.

[0023] As Figures 1-4 shown, the silicon-containing wastewater recycling and reuse device of this embodiment includes a recycling module, a solid-liquid separation module, and a circulation module arranged in sequence. The recycling module includes a PH adjustment tank 1 and a coagulation reaction tank 2. A delivery pump is arranged between the PH adjustment tank 1 and the coagulation reaction tank 2. The delivery pump uses a centrifugal pump. The solid-liquid separation module includes a sedimentation tank 3. An overflow trough 4 is arranged at the upper part of the sedimentation tank 3, and a sludge discharge device is arranged at the bottom. The discharge end of the sludge discharge device is provided with a plate filter press 5. The precipitated filter material is filtered by the plate filter press 5 to form silicon sludge and recycled water. The recycled water is injected into the recycling water tank 6. The circulation module includes the recycling water tank 6 communicated with the overflow trough 4. A circulation pipeline 7 extending to the cutting workshop is arranged in the recycling water tank 6. After the cutting wastewater is treated by the recycling water tank and recycled, it is then transported to the penguin car workshop through the circulation pipeline 7 for secondary use, realizing the recycling of wastewater and reducing the waste of water resources.

[0024] An aeration and stirring system, a liquid level gauge 8, and a PH tester 9 are arranged in the PH adjustment tank 1. The PH tester can measure the PH of the sewage, and the liquid level gauge 8 can control the height of the sewage level. When the water level height reaches the set value, the sewage with adjusted PH is transported to the coagulation reaction tank 2 through the delivery pump. The main function of the aeration system is to prevent the sewage from precipitating in the PH adjustment tank 1.

[0025] The aeration and agitation system includes a booster pump 10 and an aeration pipe group. The aeration pipe group includes an annular pipe 11 connected to the booster pump 10. A shunt pipe 12 is provided at the lower part of the annular pipe 11. A positioning ring pipe 13 connected to the shunt pipe 12 is provided at the bottom of the pH adjustment tank 1. A connecting pipe 16 is provided between the annular pipe 11 and the booster pump 10. A medicine injection pipe 17 is installed in the middle of the connecting pipe 16. The other end of the medicine injection pipe 17 is connected to a flow pump 18. Through the medicine injection pipe 17, lactic acid can be added into the pH adjustment tank 1 by using the aeration and agitation system. Compared with the conventional method of adding lactic acid alone and then using the aeration and agitation system to stir and mix the materials evenly, the materials can be evenly mixed during the addition process, so that the materials are more evenly distributed in the pH adjustment tank 1.

[0026] The annular pipe 11, the positioning ring pipe 13 and the pH adjustment tank 1 are all concentrically distributed and their diameters gradually increase. The annular pipe 11 is located at the middle position in the upper part of the pH adjustment tank 1. Support rods for installing the annular pipe 11 are provided on the side wall of the pH adjustment tank 1.

[0027] The number of the shunt pipes 12 is multiple and they are evenly distributed along the circumferential direction of the annular pipe 11. Aeration holes 14 are provided on both the inner side wall and the outer side wall of each shunt pipe 12. The aeration holes 14 on both the inner and outer sides can blow air to both the inner and outer sides simultaneously, enhancing the turbulence effect, avoiding the deposition phenomenon, and improving the efficiency of sewage treatment.

[0028] A drain trough 15 connected to the recovery water tank 6 is provided below the plate and frame filter press 5 to recycle the squeezed water and improve the utilization rate of the wastewater.

[0029] Embodiment 2

[0030] The same parts as those in Embodiment 1 will not be described again. The differences are as follows: Figure 5 As shown in the figure: The shunt pipes 12 are installed obliquely and distributed in an S shape. The S-shaped distribution method can form a flow velocity difference in the upper and lower parts of the pH adjustment tank 1 to enhance the turbulence effect and avoid the occurrence of the deposition phenomenon.

[0031] It should be noted that in the description of the present invention, the terms indicating directions or position relationships such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or position relationships shown in the drawings. This is only for convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0032] In addition, it should be noted that in the description of the present utility model, unless otherwise clearly specified and defined, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those skilled in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0033] The term "comprising" or any other similar term is intended to cover non-exclusive inclusion, such that a process, article, or apparatus / device comprising a series of elements includes not only those elements but also other elements not expressly listed, or also includes elements inherent to these process, article, or apparatus / device.

[0034] So far, the technical solution of the present utility model has been described in conjunction with the preferred embodiments shown in the drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present utility model is obviously not limited to these specific embodiments. Without departing from the principle of the present utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present utility model.

Claims

1. A device for recycling and reusing silicon-containing wastewater, comprising a recovery module, a solid-liquid separation module, and a circulation module arranged in sequence, characterized in that: The recycling module includes a pH adjustment tank (1) and a coagulation reaction tank (2), and a transfer pump is arranged between the pH adjustment tank (1) and the coagulation reaction tank (2); The solid-liquid separation module includes a sedimentation tank (3), an overflow trough (4) is arranged at the upper part of the sedimentation tank (3), a sludge discharge device is arranged at the bottom, and a plate-and-frame filter press (5) is arranged at the discharge end of the sludge discharge device; The circulation module includes a recycling water tank (6) communicated with the overflow trough (4), and a circulation pipeline (7) extending to the cutting workshop is arranged in the recycling water tank (6).

2. The silicon-containing wastewater recycling and reuse device according to claim 1, characterized in that: An aeration and agitation system, a liquid level gauge (8) and a pH tester (9) are arranged in the pH adjustment tank (1).

3. The silicon-containing wastewater recycling and reuse device according to claim 2, characterized in that: The aeration and agitation system includes a booster pump (10) and an aeration pipe group. The aeration pipe group includes an annular pipe (11) connected to the booster pump (10). A shunt pipe (12) is arranged at the lower part of the annular pipe (11), and a positioning ring pipe (13) connected to the shunt pipe (12) is arranged at the bottom of the pH adjustment tank (1).

4. The silicon-containing wastewater recycling and reuse device according to claim 3, characterized in that: The annular pipe (11), the positioning ring pipe (13) and the pH adjustment tank (1) are concentrically distributed and the diameters gradually increase. The annular pipe (11) is located at the middle position of the upper part of the pH adjustment tank (1).

5. The silicon-containing wastewater recycling and reuse device according to claim 4, wherein: The number of the shunt pipes (12) is multiple and they are evenly distributed along the circumferential direction of the annular pipe (11). Aeration holes (14) are arranged on the inner side wall and the outer side wall of each shunt pipe (12).

6. The silicon-containing wastewater recycling and reuse device according to claim 5, characterized in that: The shunt pipes (12) are obliquely installed and are distributed in an S shape.

7. The silicon-containing wastewater recycling and reuse device according to claim 1, characterized in that: A drainage trough (15) connected to the recycling water tank (6) is arranged below the plate-and-frame filter press (5).

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