Electroplating wastewater treatment equipment

Abstract

The utility model discloses a kind of electroplating wastewater treatment equipment, including sequentially detachably connected adjusting pool, treatment pool group and clean water pool, the adjusting pool and clean water pool are support pool, the treatment pool group includes sequentially communicated first reaction pool, second reaction pool, flocculation and sedimentation pool and two sedimentation pool using integrated structure design, the adjusting pool, flocculation and sedimentation pool and two sedimentation pool are all connected by sludge discharge device connecting plate frame filter press.The utility model changes in traditional wastewater treatment equipment, by excavating various large pool group structures on ground, using support pool as adjusting pool and clean water pool, and designing integrated treatment pool group, size can be customized according to wastewater treatment volume, simultaneously, between treatment pool group and adjusting pool, clean water pool, design into detachably connected, with small floor area, lower construction cost and transportation mobile convenient, especially suitable for small amount of wastewater treatment, use more flexible.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, and in particular to an electroplating wastewater treatment device. Background Technology

[0002] Electroplating products are currently widely used in industries such as electronics, automobiles, machinery, and aerospace. With the development of cutting-edge technologies, the electroplating industry has gradually become an important part of the current development stage. However, the wastewater generated during the electroplating process can easily cause pollution. For high-concentration heavy metal pollutants in electroplating wastewater, most electroplating companies in my country still use traditional chemical precipitation treatment processes. For example, an electroplating wastewater treatment device and method with application announcement number CN109179866 A has the following main treatment process;

[0003] (1) Wastewater first enters the water quality and quantity homogenization and primary sedimentation stage;

[0004] (2) Use a combination of "alkaline agent + flocculant" for secondary precipitation;

[0005] (3) Finally, the wastewater passes through the pH adjustment section and is discharged in compliance with standards.

[0006] While conventional chemical precipitation processes offer relatively low treatment costs and good results, the associated wastewater treatment systems typically require a large footprint and multiple reaction tanks, leading to high initial investment costs. This is particularly inconvenient and uneconomical for treating wastewater from non-stationary sources with small treatment volumes. Utility Model Content

[0007] The purpose of this invention is to address the shortcomings of existing technologies by proposing an electroplating wastewater treatment device that, while ensuring the wastewater treatment effect, has a small footprint, low construction cost, and is easy to transport and move. It is especially suitable for treating small amounts of wastewater and is more flexible in use.

[0008] The technical solution to achieve the purpose of this utility model is:

[0009] An electroplating wastewater treatment device includes an equalization tank, a treatment tank group, and a clear water tank that are detachably connected in sequence. The equalization tank and the clear water tank are support tanks. The treatment tank group includes a first reaction tank, a second reaction tank, a flocculation and sedimentation tank, and a secondary sedimentation tank that are designed with an integrated structure and connected in sequence. The equalization tank, the flocculation and sedimentation tank, and the secondary sedimentation tank are all connected to a plate and frame filter press through a sludge discharge device.

[0010] Furthermore, the support pool is a PVC pool.

[0011] Furthermore, the treatment pool group has a cuboid structure with a first partition and a second partition arranged in parallel inside. A third partition is arranged perpendicularly between the middle of the first partition and the inner wall of the treatment pool. The first partition, the second partition and the third partition divide the treatment pool into four rectangular pools. The two rectangular pools arranged aligned along the width direction of the treatment pool group are the first reaction pool and the second reaction pool, respectively. The other two rectangular pools are the flocculation sedimentation pool and the secondary sedimentation pool, respectively.

[0012] Furthermore, the first partition is located at the second reaction tank, and both the second and third partitions are provided with through grooves, on which valves are installed.

[0013] Furthermore, the first reaction tank is a primary conditioning tank for pH adjustment using quicklime, and the second reaction tank is a secondary conditioning tank for pH adjustment using sodium sulfide.

[0014] Furthermore, the sludge discharge device is a sludge pump.

[0015] Furthermore, a submersible pump is installed between the secondary sedimentation tank and the clear water tank, and the supernatant from the secondary sedimentation tank is transported to the clear water tank via the submersible pump.

[0016] Furthermore, a mixer is installed at the bottom of the first reaction tank, the second reaction tank, and the flocculation sedimentation tank.

[0017] Furthermore, the first reaction tank, the second reaction tank, and the flocculation and sedimentation tank are all equipped with dosing ports.

[0018] By adopting the above technical solution, this utility model has the following beneficial effects:

[0019] (1) This utility model changes the traditional wastewater treatment equipment by excavating and building various large pool groups on the ground, adopts a support pool as an equalization pool and a clear water pool, and designs an integrated treatment pool group. The size can be customized according to the wastewater treatment volume. At the same time, the treatment pool group is designed to be detachably connected with the equalization pool and the clear water pool. It has a small footprint, low construction cost and convenient transportation and movement. It is especially suitable for treating small amounts of wastewater and is more flexible in use. The sludge generated after treatment is dewatered by a plate and frame filter press and then handed over to a qualified hazardous waste unit for final disposal. No secondary pollution is generated in the entire disposal process.

[0020] (2) The support pool of this utility model is made of PVC material, which has excellent corrosion resistance, low manufacturing cost, light material and easy transportation.

[0021] (3) The present invention designs the treatment tank group into a rectangular structure, and directly divides the treatment tank into a first reaction tank, a second reaction tank, a flocculation and sedimentation tank and a secondary sedimentation tank through a partition, which is simple in structure.

[0022] (4) This utility model realizes the connection and opening / closing of the first reaction tank, the second reaction tank, the flocculation sedimentation tank and the secondary sedimentation tank through valves, which is convenient to operate.

[0023] (5) The reaction tank of this utility model uses quicklime and sodium sulfide for two pH adjustments, which improves the effluent treatment effect and reduces the amount of sludge generated.

[0024] (6) The present invention has a pre-installed mixer and a dosing port in the treatment tank for easy use. Attached Figure Description

[0025] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings, wherein:

[0026] Figure 1 This is a schematic diagram of the structure of the treatment pool group of this utility model;

[0027] Figure 2 This is a flow chart of the wastewater treatment process of this utility model.

[0028] The labels in the attached diagram are:

[0029] 1. Equalization tank; 2. Clear water tank; 3. First reaction tank; 4. Second reaction tank; 5. Flocculation and sedimentation tank; 6. Secondary sedimentation tank; 7. Sludge discharge device; 8. Plate and frame filter press; 9. First baffle; 10. Second baffle; 11. Third baffle; 12. Through channel; 13. Mixer. Detailed Implementation

[0030] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0031] (Example 1)

[0032] like Figures 1 to 2The electroplating wastewater treatment equipment shown includes a regulating tank 1, a treatment tank group, and a clear water tank 2, which are detachably connected in sequence. The treatment tank group includes a first reaction tank 3, a second reaction tank 4, a flocculation and sedimentation tank 5, and a secondary sedimentation tank 6, all designed as an integrated structure and connected in sequence. The regulating tank 1 and the clear water tank 2 are support tanks. The regulating tank 1, the flocculation and sedimentation tank 5, and the secondary sedimentation tank 6 are all connected to a plate and frame filter press 8 via a sludge discharge device 7. This embodiment changes the traditional wastewater treatment equipment that uses various large tank structures excavated in the ground. It innovatively adopts a support tank structure as the regulating tank and the clear water tank, and designs an integrated treatment tank group. The size of the treatment tank group can be customized according to the volume of wastewater to be treated. At the same time, the treatment tank group is designed to be detachably connected to the regulating tank 1 and the clear water tank 2. It has a small footprint, low construction cost, and convenient transportation and movement. It is especially suitable for treating small amounts of wastewater and is more flexible in use. The sludge generated after treatment is dewatered by the plate and frame filter press 8 and then handed over to a qualified hazardous waste unit for final disposal. No secondary pollution is generated during the entire disposal process.

[0033] Specifically, equalization tank 1 is used for homogenization and volume treatment of electroplating wastewater; first reaction tank 3 is used to adjust the pH of the wastewater and remove suspended solids; second reaction tank 4 further adjusts the pH of the wastewater and precipitates and removes metallic copper from the wastewater; flocculation sedimentation tank 5 is used for flocculation and sedimentation of large particles and colloids; secondary sedimentation tank 6 is used for sedimentation of sludge after the reaction; sludge discharge device 7 is used to discharge the sludge generated in each stage, using a sludge pump; plate and frame filter press 8 is used for sludge dewatering; and clear water tank 2 is used for temporary storage and testing of the treated wastewater.

[0034] The support tank is made of PVC, which has excellent corrosion resistance, low manufacturing cost, and is lightweight, making it easy to transport. The treatment tank group has a cuboid structure with a first partition 9 and a second partition 10 arranged parallel to each other inside. A third partition 11 is arranged perpendicularly between the middle of the first partition 9 and the inner wall of the treatment tank. The first partition 9, the second partition 10, and the third partition 11 divide the treatment tank into four rectangular tanks, resulting in a simple structure. Two rectangular tanks aligned along the width of the treatment tank group are the first reaction tank 3 and the second reaction tank 4, and the other two rectangular tanks are the flocculation and sedimentation tank 5 and the secondary sedimentation tank 6, respectively. The first partition 9 at the second reaction tank 4, as well as the second partition 10 and the third partition 11, are provided with through grooves 12. Valves are installed on the through grooves 12, allowing for the connection and opening / closing of the first reaction tank 3, the second reaction tank 4, the flocculation and sedimentation tank 5, and the secondary sedimentation tank 6, making operation convenient. The bottom of the first reaction tank 3, the second reaction tank 4, and the flocculation and sedimentation tank 5 are all equipped with a mixer 13, and each has a dosing port at the top for easy use.

[0035] The first reaction tank 3 is a primary conditioning tank for pH adjustment using quicklime, with an effective content of ≥85%. The second reaction tank 4 is a secondary conditioning tank for pH adjustment using sodium sulfide, with an effective content of ≥60%. By using quicklime and sodium sulfide for pH adjustment twice, the effluent treatment effect is improved while reducing the amount of sludge generated.

[0036] This embodiment is applied to the treatment of copper-containing electroplating wastewater, and the specific process is as follows:

[0037] The inlet of equalization tank 1 is connected to the outlet of sewage tank through a pipe. Wastewater in sewage tank is pumped into equalization tank 1 by sewage pump to equalize the quality and quantity of wastewater.

[0038] Wastewater enters the first reaction tank 3, where quicklime is added to adjust the pH to ≥5.8. Then, the wastewater passes through the second reaction tank 4, where sodium sulfide solution is added to adjust the pH to approximately 8.5. The wastewater then enters the flocculation sedimentation tank 5, where flocculants and coagulants are added to cause flocculation and sedimentation. In this embodiment, the flocculants and coagulants are PAM and PAC, respectively. The PAM concentration is 1%, with a dosage of 1-2 ml / L wastewater, and the PAC concentration is 10%-20%, with a dosage of 1-2 ml / L wastewater. After addition... The wastewater is thoroughly mixed with the treated water. The final treated wastewater passes through a secondary sedimentation tank to remove remaining suspended solids. The outlet of the secondary sedimentation tank is connected to the inlet of the clear water tank. A submersible pump transports the supernatant from the secondary sedimentation tank to the clear water tank for testing. The sludge deposited at the bottom of the first reaction tank 3, the second reaction tank 4, the flocculation sedimentation tank 5, and the secondary sedimentation tank 6 is pumped through a sludge discharge device 7 to a plate and frame filter press 8 for dewatering. The dewatered sludge is disposed of as hazardous waste by a qualified third-party organization. The wastewater is returned to the equalization tank 1 through a pipeline for further treatment. Wastewater in the clear water tank 2, after sampling and testing and meeting standards, is either discharged into the municipal sewer system or reused on-site.

[0039] This device treats copper-containing electroplating wastewater from an electronics factory in Jiangsu Province. The initial copper concentrations in the wastewater were 143 mg / L and 108 mg / L. After treatment by this device, the copper concentrations in the effluent were 1.01 mg / L and 0.98 mg / L, respectively, achieving a copper removal rate of approximately 99%. This effectively removes most of the copper from the wastewater and meets the requirements for treating copper-containing electroplating wastewater.

[0040] This invention changes the traditional wastewater treatment equipment structure that involves excavating and constructing various large pool groups on the ground. Instead, it uses a support pool as both an equalization pool and a clear water pool, and designs an integrated treatment pool group. The size can be customized according to the volume of wastewater to be treated. At the same time, the treatment pool group is designed to be detachably connected to the equalization pool 1 and the clear water pool 2. It has a small footprint, low construction cost, and is easy to transport and move. It is especially suitable for treating small amounts of wastewater and is more flexible in use. The sludge generated after treatment is dewatered by a plate and frame filter press 8 and then handed over to a qualified hazardous waste unit for final disposal. No secondary pollution is generated during the entire disposal process.

[0041] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above descriptions are merely specific embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An electroplating wastewater treatment device, characterized in that: It includes an equalization tank, a treatment tank group, and a clear water tank that are detachably connected in sequence. The equalization tank and the clear water tank are support tanks. The treatment tank group includes a first reaction tank, a second reaction tank, a flocculation and settling tank, and a secondary settling tank that are designed with an integrated structure and connected in sequence. The equalization tank, the flocculation and settling tank, and the secondary settling tank are all connected to a plate and frame filter press through a sludge discharge device.

2. The electroplating wastewater treatment equipment according to claim 1, characterized in that: The support pool is a PVC pool.

3. The electroplating wastewater treatment equipment according to claim 1, characterized in that: The treatment pool group has a cuboid structure with a first partition and a second partition arranged in parallel inside. A third partition is arranged perpendicularly between the middle of the first partition and the inner wall of the treatment pool. The first partition, the second partition and the third partition divide the treatment pool into four rectangular pools. Two rectangular pools are aligned along the width of the treatment pool group, which are the first reaction pool and the second reaction pool, respectively. The other two rectangular pools are the flocculation sedimentation pool and the secondary sedimentation pool, respectively.

4. The electroplating wastewater treatment equipment according to claim 3, characterized in that: The first partition is located at the second reaction tank, and both the second and third partitions are provided with through grooves, on which valves are installed.

5. The electroplating wastewater treatment equipment according to claim 1, characterized in that: The first reaction tank is a primary conditioning tank for pH adjustment using quicklime, and the second reaction tank is a secondary conditioning tank for pH adjustment using sodium sulfide.

6. The electroplating wastewater treatment equipment according to claim 1, characterized in that: The sludge discharge device is a sludge pump.

7. The electroplating wastewater treatment equipment according to claim 1, characterized in that: A submersible pump is installed between the secondary sedimentation tank and the clear water tank, and the supernatant from the secondary sedimentation tank is transported to the clear water tank via the submersible pump.

8. The electroplating wastewater treatment equipment according to claim 1, characterized in that: A mixer is installed at the bottom of the first reaction tank, the second reaction tank, and the flocculation sedimentation tank.

9. The electroplating wastewater treatment equipment according to claim 1, characterized in that: The first reaction tank, the second reaction tank, and the flocculation and sedimentation tank are all equipped with dosing ports.

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