Treatment device for deeply treating biochemical precipitation effluent of circuit board

Abstract

The utility model relates to the technical field of wastewater treatment, in particular to a treatment device for deeply treating biochemical precipitation effluent of a circuit board, which comprises an adjusting tank, a filter tank is arranged at the rear end of the adjusting tank, a filter module is arranged in the filter tank, and the filter module comprises a water distribution weir, filter cloth, a backwashing pump, a backwashing pipeline, an effluent weir, a partition plate and a filter disc. The water distribution weir is fixedly connected with the left side of the inner bottom wall of the filter, the water outlet weir is fixedly connected with the right side of the inner bottom wall of the filter, and the partition plate is fixedly connected with the middle-right position of the inner top wall of the filter; water in the secondary sedimentation tank is pretreated through cooperation of the filter disc and the filter cloth, suspended solids in wastewater are effectively removed, pollutants in the form of non-suspended solids such as COD, ammonia nitrogen and total nitrogen in the wastewater are reduced, the load of a subsequent magnetic coagulation system is reduced, the overall operation cost is reduced, the wastewater treatment efficiency is further improved, and the wastewater treatment effect is improved.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, specifically to a treatment device for deep treatment of biochemical sedimentation effluent from circuit boards. Background Technology

[0002] Wastewater treatment utilizes physical, chemical, and biological methods to purify wastewater, reduce pollution, and achieve wastewater recycling and reuse, thus fully utilizing water resources. Commonly used agents in wastewater treatment include flocculants, coagulants, and conditioners. Treatment technologies include pretreatment, new fillers, and ceramic membranes. In the current process of treating circuit board wastewater, the first two stages of physical-chemical treatment + A³O + Fenton magnetic coagulation process are used. With the increasing stringency of emission standards, the current process can also meet the emission standards.

[0003] However, with industrial development, the amount of wastewater discharged has increased, which will lead to an increase in the load on the Fenton magnetic coagulation system, thereby reducing the wastewater treatment efficiency and effect, and increasing equipment maintenance costs.

[0004] Therefore, it is necessary to invent a treatment device for deep treatment of biochemical sedimentation effluent from circuit boards to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a treatment device for deep treatment of biochemical sedimentation effluent from circuit boards, in order to solve the problem that with the development of industry, the amount of wastewater discharged increases, which leads to an increase in the concentration of Fenton magnetic coagulation system, resulting in a decrease in wastewater treatment efficiency and effect, and an increase in equipment maintenance costs.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a treatment device for deep treatment of biochemical sedimentation effluent from circuit boards, comprising an equalization tank, a filter tank at the rear end of the equalization tank, and a filtration module inside the filter tank. The filtration module includes a water distribution weir, filter cloth, backwash pump, backwash pipe, effluent weir, baffle plate, and filter disc. The water distribution weir is fixedly connected to the left side of the bottom wall of the filter tank, the effluent weir is fixedly connected to the right side of the bottom wall of the filter tank, and the baffle plate is fixedly connected to the right side of the center of the top wall of the filter tank.

[0007] By adopting the above technical solution, the water in the secondary sedimentation tank enters the filter tank through the equalization tank. The water in the equalization tank is pretreated by the combination of filter discs and filter cloth, which effectively removes suspended solids in the wastewater and reduces non-suspended pollutants such as COD, ammonia nitrogen and total nitrogen. This reduces the load on the subsequent magnetic coagulation system, lowers the overall operating cost, and further improves the wastewater treatment efficiency and effect.

[0008] Optionally, the water distribution weir and the left wall of the filter tank are configured as an inlet chamber, and the water outlet weir and the right wall of the filter tank are configured as an outlet chamber.

[0009] Optionally, a filtration chamber is set between the weir and the baffle, and a water storage chamber is set between the outlet weir and the baffle.

[0010] By adopting the above technical solution, the wastewater first enters the inlet chamber, and then flows into the filtration chamber when the water level is higher than the distribution weir. The filtered water is stored in the storage chamber, and flows into the outlet chamber when the water level is higher than the outlet weir.

[0011] Optionally, a mounting frame is fixedly connected inside the filter chamber, and multiple sets of filter discs are installed on the inner side of the mounting frame, with the filter cloth fixed to the surface of the filter discs.

[0012] By adopting the above technical solution, the filter disc is installed vertically and rotates inside the mounting frame. During the filtration process, some of the suspended solids in the incoming water are blocked by the filter cloth and sink to the bottom, while the other part is adsorbed on the surface of the disc.

[0013] Optionally, the backwash pump is fixedly installed at the upper end of the filter tank, the backwash pipe is fixedly connected to the output end of the backwash pump, and the lower end of the backwash pipe extends to the inside of the filter cloth.

[0014] By adopting the above technical solution, the backwashing pump uses negative pressure to draw water from the surface of the filter cloth, and the water filtered inside the water storage chamber cleans the filter cloth and filter disc from the inside out.

[0015] Optionally, a drainage pipe is fixedly connected to the right end of the filter tank.

[0016] By adopting the above technical solution, the drainage pipe is used to discharge water from the outlet chamber to the magnetic coagulation system.

[0017] Optionally, an inlet pipe is fixedly connected to the left end of the equalization tank, a lift pump is installed inside the equalization tank, a lift pipe is fixedly connected to the output end of the lift pump, and the right end of the lift pipe is fixedly connected to the left side of the filter tank.

[0018] By adopting the above technical solution, the equalization tank is used to adjust the pH value inside the wastewater, and the water inside the equalization tank is pumped into the filter tank by a lift pump.

[0019] Optionally, the riser pipe is equipped with a flow control valve and a flow meter.

[0020] By adopting the above technical solution, the flow control valve is used to regulate the wastewater flow rate, and the flow meter is used to detect the flow rate.

[0021] The technical effects and advantages provided by this utility model in the above technical solution are as follows:

[0022] 1. This utility model utilizes a combination of filter discs and filter cloth to pretreat water in a secondary sedimentation tank, effectively removing suspended solids from wastewater and reducing non-suspended pollutants such as COD, ammonia nitrogen, and total nitrogen. This reduces the load on the subsequent magnetic coagulation system, lowers overall operating costs, further improves wastewater treatment efficiency, and enhances wastewater treatment effectiveness.

[0023] 2. This utility model uses a backwash pump to draw negative pressure from the surface of the filter cloth, and then uses water filtered inside the water storage chamber to clean the filter cloth and filter disc from the inside out. This effectively cleans the suspended matter on the surface of the filter cloth and filter disc, maintains the unobstructed flow of the filter cloth and filter disc, and thus effectively stabilizes the wastewater treatment speed. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0025] Figure 2 This is a schematic diagram of the regulating tank structure of this utility model;

[0026] Figure 3 This is a schematic diagram of the filter structure of this utility model.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1. Equalization tank; 11. Inlet pipe; 12. Booster pump; 13. Booster pipe; 14. Flow control valve; 15. Flow meter; 2. Filter tank; 21. Distribution weir; 22. Inlet chamber; 23. Filtration chamber; 24. Outlet chamber; 25. Filter cloth; 26. Drainage pipe; 27. Backwash pump; 28. Backwash pipe; 29. ​​Outlet weir; 210. Baffle plate; 211. Water storage chamber; 212. Filter disc. Detailed Implementation

[0029] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0030] This utility model provides, for example Figures 1 to 3 The device shown is a treatment device for deep treatment of biochemical sedimentation effluent from circuit boards. It includes an equalization tank 1, a filter tank 2 at the rear end of the equalization tank 1, an inlet pipe 11 fixedly connected to the left end of the equalization tank 1, a lift pump 12 installed inside the equalization tank 1, a lift pipe 13 fixedly connected to the output end of the lift pump 12, a lift pipe 13 fixedly connected to the right end of the lift pipe 13 and a flow control valve 14 and a flow meter 15 installed on the lift pipe 13, a drain pipe 26 fixedly connected to the right end of the filter tank 2, and a filter module installed inside the filter tank 2. The filter module includes a water distribution weir 21, a filter cloth 25, a backwash pump 27, a backwash pipe 28, an outlet weir 29, a baffle 210 and a filter disc 212.

[0031] The wastewater is first discharged into the equalization tank 1, where neutralizing materials are added to adjust the pH value to neutral. Then, the neutralized wastewater is pumped to the filter tank 2 using a lift pump 12 and a lift pipe 13. At this point, the filter cloth 25 and filter disc 212 in the filter module of the filter tank 2 filter the wastewater, pre-treating it to effectively remove suspended solids and reduce non-suspended pollutants such as COD, ammonia nitrogen, and total nitrogen. The wastewater is then pumped to the magnetic coagulation system through the drainage pipe 26. Because the wastewater has undergone filtration pre-treatment, the load on the magnetic coagulation system is effectively reduced, the flocculation, sedimentation, and separation efficiency of the magnetic coagulation system is improved, and the treatment effect on the wastewater is enhanced, while further reducing the treatment cost of the magnetic coagulation system.

[0032] See Figure 3 The water distribution weir 21 is fixedly connected to the left side of the bottom wall of the filter tank 2, the water outlet weir 29 is fixedly connected to the right side of the bottom wall of the filter tank 2, the partition plate 210 is fixedly connected to the right side of the middle of the top wall of the filter tank 2, the water distribution weir 21 and the left wall of the filter tank 2 form an inlet chamber 22, the water outlet weir 29 and the right wall of the filter tank 2 form an outlet chamber 24, the water distribution weir 21 and the partition plate 210 form a filter chamber 23, the water outlet weir 29 and the partition plate 210 form a water storage chamber 211, the filter chamber 23 is fixedly connected to the inside of the filter chamber 23, multiple filter discs 212 are installed on the inside of the mounting frame, the filter cloth 25 is fixed on the surface of the filter discs 212, the backwash pump 27 is fixedly installed at the upper end of the filter tank 2, the backwash pipe 28 is fixedly connected to the output end of the backwash pump 27, and the lower end of the backwash pipe 28 extends to the inside of the filter cloth 25.

[0033] Specifically, the front end of the equalization tank 1 is set as a secondary sedimentation tank. The effluent from the secondary sedimentation tank flows into the equalization tank 1 by gravity, and then is pumped into the filter tank 2 by the lift pump 12. The wastewater is filtered through the filter cloth 25 and the rotating filter disc 212. The filtrate is collected inside the water storage chamber 211 and discharged from the filter tank by gravity through the effluent weir 29. The whole process is continuous.

[0034] In addition, the wastewater in the equalization tank 1 first flows into the inlet chamber 22. When the water level is higher than the distribution weir 21, the wastewater flows into the filter chamber 23. At this time, the filter cloth 25 and the filter disc 212 filter the wastewater. Since the filter disc 212 is installed vertically, some of the suspended solids in the inlet are blocked by the filter cloth 25 and sink to the bottom of the tank. The other part of the suspended solids are adsorbed on the surface of the filter disc 212, and the sludge layer thickness will gradually increase. As the sludge on the surface of the filter cloth 25 and the filter disc 212 gradually increases, the filtration resistance of the filter disc 212 increases, and the water level of the single filter tank 2 gradually rises. The water level difference between the filter tank 2 and the effluent can be detected by the level gauge. When the water level difference reaches the threshold, the PLC system automatically starts the backwash pump 27 through the set program to start backwashing the filter cloth 25 and the filter disc 212.

[0035] It should be noted that a drive module is installed on the right end of filter disc 212. During backwashing, the drive module drives filter disc 212 to rotate at a speed of approximately 1 r / min. The PLC system switches the backwash valve on the surface of backwash pipe 28 to clean each group of filter discs 212 in sequence. At the same time, the backwash pump 27 draws negative pressure from the surface of filter cloth 25, and the filter cloth 25 is cleaned from the inside out by the filtered water inside the water storage chamber 211, removing the accumulated sludge particles on the surface of filter cloth 25 and discharging the backwash water outward. During backwashing, one backwash pump 27 is started and kept running continuously to backwash multiple groups of filter discs 212 in sequence until all filter discs 212 are cleaned and the liquid level in filter tank 2 returns to normal. Each flushing time is 4-5 minutes. Continuous filtration is maintained during backwashing, and the backwash water volume is ≤2% of the treated water volume.

[0036] Meanwhile, in the continuous filtration test of filter 2, filter 2 showed good removal effect on suspended solids in the effluent of the secondary sedimentation tank, and the effluent quality was stable. The removal rate of suspended solids in the effluent of the secondary sedimentation tank was about 50%-70%, with an average of 60%, and the concentration of suspended solids in the effluent remained below 6 mg / L. The removal rate of ammonia nitrogen in the effluent of the secondary sedimentation tank was 8.46%-12.86%, with an average of about 10.6%, and the removal amount was 0.63-0.75 mg / L, which remained basically stable. The removal rate of total nitrogen in the effluent of the secondary sedimentation tank was 14.12%-18.02%, with an average of about 15.25%, which remained basically stable. The removal rate of COD in the effluent of the secondary sedimentation tank was 10.63%-14.56%, with an average of about 12.22%, which remained basically stable. As a result, the suspended solids content of the treated wastewater was greatly reduced, and it also had a certain treatment effect on ammonia nitrogen, total nitrogen and COD in the wastewater, thus effectively pre-treating the wastewater and reducing the load on the magnetic coagulation system.

[0037] The working principle of this utility model is as follows: the filter disc 212 and the filter cloth 25 are used to pre-treat the water in the secondary sedimentation tank, effectively removing suspended solids in the wastewater and reducing non-suspended pollutants such as COD, ammonia nitrogen and total nitrogen in the wastewater. This reduces the load on the subsequent magnetic coagulation system, lowers the overall operating cost, and further improves the wastewater treatment efficiency and effect.

[0038] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A device for treating effluent from biochemical precipitation of a deep processing circuit board, comprising a conditioning tank (1), characterized in that: The rear end of the adjusting pool (1) is provided with a filter pool (2), the inside of the filter pool (2) is provided with a filter module, the filter module comprises a water distribution weir (21), a filter cloth (25), a backwashing pump (27), a backwashing pipeline (28), a water outlet weir (29), a partition plate (210) and a filter disc (212), the water distribution weir (21) is fixedly connected with the left side position of the inner bottom wall of the filter pool (2), the water outlet weir (29) is fixedly connected with the right side position of the inner bottom wall of the filter pool (2), and the partition plate (210) is fixedly connected with the right side of the middle part of the inner top wall of the filter pool (2).

2. The device for treating effluent from biochemical precipitation of a deep processing circuit board according to claim 1, characterized in that: The water distribution weir (21) and the left wall of the filter pool (2) are provided with a water inlet chamber (22), and the water outlet weir (29) and the right wall of the filter pool (2) are provided with a water outlet chamber (24).

3. The device for treating effluent from biochemical precipitation of a deep processing circuit board according to claim 1, characterized in that: The water distribution weir (21) and the partition plate (210) are provided with a filter chamber (23), and the water outlet weir (29) and the partition plate (210) are provided with a water storage chamber (211).

4. The device for treating effluent from biochemical precipitation of a deep processing circuit board according to claim 3, characterized in that: The inside of the filter chamber (23) is fixedly connected with a mounting frame, a plurality of filter discs (212) are mounted on the inner side of the mounting frame, and the filter cloth (25) is fixed on the surface of the filter disc (212).

5. The device for treating effluent from biochemical precipitation of a deep processing circuit board according to claim 1, characterized in that: The backwashing pump (27) is fixedly installed at the upper end of the filter pool (2), the backwashing pipeline (28) is fixedly connected with the output end of the backwashing pump (27), and the lower end of the backwashing pipeline (28) extends to the inner side of the filter cloth (25).

6. The device for treating effluent from biochemical precipitation of a deep processing circuit board according to claim 1, characterized in that: The right end of the filter pool (2) is fixedly connected with a drainage pipeline (26).

7. The device for treating effluent from biochemical precipitation of a deep processing circuit board according to claim 1, characterized in that: The left end of the adjusting pool (1) is fixedly connected with a water inlet pipeline (11), the inside of the adjusting pool (1) is provided with a lifting pump (12), the output end of the lifting pump (12) is fixedly connected with a lifting pipeline (13), and the right end of the lifting pipeline (13) is fixedly connected with the left side of the filter pool (2).

8. The device for treating effluent from biochemical precipitation of a deep processing circuit board according to claim 7, characterized in that: The surface of the lifting pipeline (13) is provided with a flow control valve (14) and a flow meter (15).

Images