Integrated nickel aminosulfonate wastewater treatment system

Abstract

The utility model relates to an integrated nickel aminosulfonate wastewater treatment system which mainly comprises a tank body, a filter chamber and an electrochemical catalysis device. Through the structural design of the filtering chamber, the electrochemical catalysis device, the first flow guide chamber and the second flow guide chamber, a filtering system and an electrochemical catalytic oxidation system are combined together, the occupied area of the nickel aminosulfonate wastewater treatment system is reduced, large-proportion circulation of internal water flow can be realized, and the impact load resistance and the treatment efficiency of the device are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to an integrated nickel sulfamate wastewater treatment system. Background Art

[0002] In the field of precision instrument manufacturing, the electroplating process is a key step to improve component performance and extend service life. As an efficient electroplating main salt, nickel sulfamate is widely used in the electroplating process due to its advantages such as low internal stress, fast deposition rate and high solubility. However, the nickel sulfamate residue on the surface of the finished parts after electroplating needs to be removed through a rinsing process to ensure product quality and prepare for subsequent processes. This step inevitably produces nickel-containing wastewater, the main component of which is nickel sulfamate (organic nickel, in a complex state), as well as higher concentrations of nickel and total nitrogen, and the chemical oxygen demand (COD) concentration is also relatively high. If this wastewater is discharged directly, it will cause serious pollution to the environment.

[0003] In order to solve this problem, a variety of technologies have been developed to treat nickel sulfamate rinsing wastewater. Among them, sodium hypochlorite oxidation and chemical precipitation are commonly used treatment methods, but these two methods usually need to be used in combination to improve the treatment efficiency. However, these methods have some limitations, including large dosage, incomplete oxidation and decomposition effect, low pollutant removal efficiency, and large area of ​​treatment facilities. In addition, although the activated carbon adsorption method can effectively remove nickel sulfamate, it faces the risk of difficulty in activated carbon regeneration and secondary pollution. When the reverse osmosis method is used to treat nickel sulfamate wastewater, there is a risk of membrane contamination due to the high COD and total nitrogen content in the wastewater, resulting in high cleaning and replacement frequencies, which increases the treatment cost.

[0004] The existing technology has the following major problems in treating nickel sulfamate rinsing wastewater: 1) The oxidation and chelation are not thorough, resulting in incomplete removal of pollutants; 2) The pollutant removal efficiency is low and cannot meet the increasingly stringent environmental protection requirements; 3) The treatment facilities occupy a large area, which is not conducive to industrial-scale application; 4) It is easy to generate secondary pollution and fail to achieve a closed loop of environmental protection treatment; 5) The ability to resist shock loads is poor, which can easily cause system paralysis when the water quality fluctuates greatly. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present application aims to provide an improved nickel sulfamate wastewater treatment system, which can treat nickel-containing wastewater in a highly efficient and low-cost manner while reducing environmental impact and the risk of secondary pollution.

[0006] To achieve the above objectives, this application is implemented through the following technical solutions:

[0007] The present application provides an integrated nickel sulfamate wastewater treatment system, comprising: a tank body,

[0008] A filter chamber, wherein the filter chamber is arranged inside the tank body, the bottom of the filter chamber is filled with filter fillers, the bottom of the filter chamber is connected to the nickel sulfamate wastewater inlet, and is used to filter the nickel sulfamate wastewater, the side wall of the filter chamber is divided into a first side wall and a second side wall, the first side wall overlaps with a part of the side wall of the tank body, the filter chamber also separates the inner cavity of the tank body into a receiving cavity, and a water outlet is provided on the second side wall, the water outlet is located on the upper part of the filter filler, and is used to guide the filtered water out of the filter chamber, and an overflow weir is provided on the first side wall, which is used to discharge the water treated by the wastewater treatment system;

[0009] An electrochemical catalytic device, the electrochemical catalytic device is located in the accommodating chamber, connected to a rectifier, and divides the accommodating chamber into a first flow guide chamber and a second flow guide chamber, the electrochemical catalytic device comprises a first enclosure, a second enclosure, and a plurality of electrochemical catalytic units located between the first enclosure and the second enclosure, the first enclosure is used to separate the first flow guide chamber and the electrochemical catalytic unit, and the bottom of the first flow guide chamber and the electrochemical catalytic unit are connected, the bottom of the second enclosure is connected to the bottom of the filter chamber, and is used to separate the second flow guide chamber from the first flow guide chamber and the electrochemical catalytic unit;

[0010] The top of the first flow guide chamber is connected to the water outlet, the top of the electrochemical catalytic unit is connected to the top of the second flow guide chamber, and the bottom of the second flow guide chamber is connected to the bottom of the filter chamber.

[0011] Based on the above technical solution, the present application integrates the electrochemical catalytic device with the filter chamber, and optimizes the wastewater flow path through the structural design of the first flow guide chamber, the second flow guide chamber and the electrochemical catalytic device, improves the treatment efficiency, and reduces energy consumption. This integrated design simplifies the installation process, reduces the floor space, facilitates maintenance and operation, and reduces the overall cost of the system.

[0012] As a further improvement of the present application, the filter chamber divides the accommodating cavity into two symmetrical parts.

[0013] As a further improvement of the present application, the electrochemical catalytic unit can be a columnar structure, including a column core and a ring column surrounding the column core, wherein: the column core is a negative electrode and the ring column is a positive electrode, or the column core is a positive electrode and the ring column is a negative electrode.

[0014] As a further improvement of the present application, the electrochemical catalytic unit may also be a sheet structure, including a positive electrode sheet and a negative electrode sheet, and the positive electrode sheet and the negative electrode sheet are arranged in parallel and opposite to each other.

[0015] The structural design of the above-mentioned several electrochemical catalytic units is conducive to the full electrochemical catalytic treatment of the nickel sulfamate wastewater, improves the oxidation and decomposition efficiency of the nickel sulfamate, and enhances the removal effect of pollutants.

[0016] As a further improvement of the present application, a grille is provided at the water outlet, and the structural design of the grille prevents the loss of the filter filler and ensures the continuity of the filtering effect.

[0017] As a further improvement of the present application, a blocking portion is provided at the position where the second enclosure wall is connected to the filter chamber. Preferably, the surface of the blocking portion is an inclined surface or an arc surface. This structural design facilitates the nickel sulfamate wastewater to flow from the first flow guide chamber into the electrochemical catalytic device without dead ends.

[0018] As a further improvement of the present application, the bottom of the filter chamber is also connected to a backwash water inlet and a backwash air inlet. This facilitates the system to perform backwashing operations, keeps the filter packing clean, and maintains long-term stable operation of the system. Preferably, the backwash water inlet is connected to a water storage unit flowing out of the overflow weir.

[0019] As a further improvement of the present application, the particle size of the filter filler increases gradually from top to bottom. The particle size distribution that increases gradually from top to bottom optimizes the filtration efficiency and water flow dynamics and improves the overall treatment performance.

[0020] As a further improvement of the present application, the filter fillers are fine sand, medium sand, coarse sand, small-grain gravel, medium-small-grain gravel, medium-grain gravel, and large-grain gravel from top to bottom. The filler layers with different particle sizes provide multiple filtering mechanisms, further improving the removal efficiency of solid particles.

[0021] The beneficial effect of the present application is that it provides an integrated nickel sulfamate wastewater treatment system with a compact structure, easy installation and maintenance. By optimizing the design of the filter chamber and the electrochemical catalytic device, the treatment efficiency and system stability are improved. The water outlet grid and the blocking part are designed to prevent the loss of the filter filler and extend the service life of the equipment. The backwash water inlet and the backwash air inlet at the bottom facilitate the backwashing of the system and maintain long-term stable operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic cross-sectional structure diagram of the aminosulfonic acid wastewater treatment device of the present application;

[0023] Figure 2 This is a schematic diagram of the top view of the aminosulfonic acid wastewater treatment device of the present application.

[0024] In the figure: 1. tank body; 2. filter chamber; 21. filter filler; 22. first side wall; 23. second side wall; 24. water outlet; 25. overflow weir; 3. accommodating chamber; 4. electrochemical catalytic device; 5. rectifier; 6. first flow guide chamber; 7. second flow guide chamber; 41. first enclosure; 42. second enclosure; 43. electrochemical catalytic unit; 8. blocking part. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be clearly and completely described below in combination with the specific embodiments and drawings of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments, and are not used to limit the scope of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0026] The present application provides an integrated nickel sulfamate wastewater treatment system, which aims to achieve efficient wastewater treatment. Figure 1 and Figure 2 As shown, the system mainly includes three parts: a tank body 1, a filter chamber 2 and an electrochemical catalytic device 4.

[0027] The tank body 1 is the shell of the whole system and provides a closed environment for wastewater treatment. The internal structure of the tank body 1 is reasonably designed, which is convenient for installation and maintenance of each treatment unit.

[0028] The filter chamber 2 is arranged inside the tank body 1, and is mainly used to filter nickel sulfamate wastewater. The bottom of the filter chamber 2 is filled with filter fillers 21, which can effectively remove suspended matter and impurities in the wastewater. In order to further improve the filtering effect, the particle size of the filler is designed to gradually increase from top to bottom. Specifically, the filter filler 21 can include fine sand, medium sand, coarse sand, small-grain gravel, medium-small-grain gravel, medium-grain gravel and large-grain gravel in sequence. Such a design can ensure that the wastewater is gradually purified when passing through the filter chamber 2.

[0029] The bottom of the filter chamber 2 is connected to a nickel sulfamate wastewater inlet for introducing wastewater to be treated. Wastewater flows from bottom to top in the filter chamber 2, and suspended matter and impurities are removed through the filtering effect of the filler. The side wall of the filter chamber 2 is divided into a first side wall 22 and a second side wall 23, wherein the first side wall 22 overlaps with part of the side wall of the tank body 1. A water outlet 24 is provided on the second side wall 23 of the filter chamber 2, and the water outlet 24 is located at the upper part of the filter filler 21, and is used to guide the filtered water out of the filter chamber 2. A grid is also provided at the position of the water outlet 24 to prevent the filler from flowing out.

[0030] An overflow weir 25 is provided on the first side wall 22. When the treated water level reaches a certain height, it is discharged through the overflow weir 25. This design ensures continuous treatment of wastewater and avoids system pressure caused by excessively high water levels.

[0031] The electrochemical catalytic device 4 is located in the accommodating chamber 3 inside the tank body 1, and the accommodating chamber 3 is separated by the filter chamber 2. The electrochemical catalytic device 4 is connected to the rectifier 5 to further treat harmful substances in the wastewater by an electrochemical method. The electrochemical catalytic device 4 divides the accommodating chamber 3 into a first flow guide chamber 6 and a second flow guide chamber 7, optimizes the flow path of the wastewater, ensures that the wastewater can flow evenly through the electrochemical catalytic unit 43, and can also reduce the footprint of the integrated nickel sulfamate wastewater treatment system.

[0032] The electrochemical catalytic device 4 includes a first enclosure 41, a second enclosure 42, and a plurality of electrochemical catalytic units 43 located therebetween. These units may adopt a columnar structure or a sheet structure, and remove harmful substances in wastewater through the reaction of positive and negative electrodes. Specifically, the electrochemical catalytic unit 43 with a columnar structure includes a column core and a ring column surrounding the column core, wherein the column core and the ring column can be used as positive and negative electrodes respectively; the electrochemical catalytic unit 43 with a sheet structure includes a positive electrode sheet and a negative electrode sheet arranged in parallel and oppositely.

[0033] In order to further improve the efficiency of wastewater treatment, a blocking portion 8 is provided at the position where the second enclosure 42 is connected to the filter chamber 2. The surface of the blocking portion 8 is designed to be an inclined surface or a curved surface to reduce water flow resistance and ensure that the wastewater can smoothly flow through the electrochemical catalytic device 4. Preferably, the top of the second enclosure 42 is higher than the water outlet height of the overflow weir 25.

[0034] In addition, the bottom of the filter chamber 2 is also connected to a backwash water inlet and a backwash air inlet. When impurities and nickel hydroxide flocs in the filter filler 21 layer accumulate to a certain extent, causing the resistance of the filter filler 21 layer to increase and affecting the flow of water, the system stops running and the filter filler 21 needs to be cleaned. When cleaning the filter filler 21 layer, the backwash air inlet and backwash water inlet are introduced from the bottom of the system to perform pulse backwashing on the filter filler 21 layer until the flocs and impurities in the filter filler 21 layer are rinsed clean, and the system continues to operate normally; the backwash drainage is discharged from the overflow weir 25 for further processing and utilization. Preferably, the backwash water inlet is connected to the water storage unit flowing out of the overflow weir 25 to achieve resource recycling.

[0035] In general, the integrated nickel sulfamate wastewater treatment system provided by the present application achieves efficient wastewater treatment through reasonable structural design and application of electrochemical catalytic technology. The system not only has good treatment effect, stable and reliable operation, but also has the advantages of small footprint and low investment cost, and is very suitable for promotion and application in industrial production.

[0036] In use: the nickel sulfamate wastewater enters the filter chamber 2 from the bottom of the device, and the particulate impurities in the wastewater are intercepted through the filter filler 21 layer to avoid affecting the electrochemical catalytic device 4. The wastewater passing through the filter filler 21 layer enters the electrochemical catalytic device 4 from the first diversion chamber 6. Under the action of the electric field, the nickel sulfamate in the wastewater undergoes direct oxidation or indirect oxidation reaction on the anode surface. On the one hand, the nickel sulfamate is oxidized and decomposed, which can achieve the direct oxidation of broken complexes, organic nitrogen and organic carbohydrates, thereby achieving the purpose of releasing nickel ions and removing total nitrogen and COD; and the OH- generated by the indirect reaction on the anode surface can quickly react with the nickel ions released by the broken complexes to generate stable nickel hydroxide floc precipitates, thereby achieving the purpose of removing nickel. On the other hand, the tiny bubbles (H2 and O2) generated by the electrocatalytic reaction flush the electrolytic surface to avoid the flocs from depositing on the electrode surface to affect the reaction; at the same time, the generated nickel hydroxide flocs (mud and water mixture) are powered to form a large water flow into the second diversion chamber 7 to avoid silting at the bottom of the electrochemical catalytic device 4 tank. The oxidized wastewater enters the bottom of the filter chamber 2 from the second guide chamber 7, mixes with the incoming water and enters the filter filler 21 layer. After intercepting nickel hydroxide flocs and impurities, the filtrate (clean water) is discharged from the overflow weir 25.

[0037] In summary, the present application provides an integrated nickel sulfamate wastewater treatment system. Through the electrocatalytic oxidation process, the system can efficiently remove pollutants such as COD, total nitrogen and nickel in the wastewater, ensuring that the wastewater is stably discharged up to standard. At the same time, the gas generated during the electrocatalytic process provides power for the wastewater circulation, enhances the interception efficiency of particle flocs and impurities, and improves the system's ability to resist shock loads and wastewater treatment efficiency. In addition, the system does not require the addition of additional agents, avoiding the introduction of new impurities and the risk of secondary pollution. It is worth mentioning that the oxidized filtrate can be reused as backwash water, and the nickel hydroxide flocs in the backwash drainage can be further recycled to achieve resource recycling. Finally, through the combined process of advanced oxidation and filtration systems, the system not only improves the treatment efficiency, but also effectively reduces the footprint of the treatment facility, providing an efficient, environmentally friendly and economical solution for wastewater treatment in industrial production.

[0038] Although this specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each implementation mode may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0039] The series of detailed descriptions listed above are only specific descriptions of feasible implementation methods of the present application. They are not intended to limit the scope of protection of the present application. Any equivalent implementation methods or changes that do not deviate from the technical spirit of the present application should be included in the scope of protection of the present application.

Claims

1. An integrated nickel sulfamate wastewater treatment system, characterized in that: include: Tank body, A filter chamber, wherein the filter chamber is arranged inside the tank body, the bottom of the filter chamber is filled with filter fillers, the bottom of the filter chamber is connected to the nickel sulfamate wastewater inlet, and is used to filter the nickel sulfamate wastewater, the side wall of the filter chamber is divided into a first side wall and a second side wall, the first side wall overlaps with a part of the side wall of the tank body, the filter chamber also separates the inner cavity of the tank body into a receiving cavity, and a water outlet is provided on the second side wall, the water outlet is located on the upper part of the filter filler, and is used to guide the filtered water out of the filter chamber, and an overflow weir is provided on the first side wall, which is used to discharge the water treated by the wastewater treatment system; An electrochemical catalytic device, the electrochemical catalytic device is located in the accommodating chamber, connected to a rectifier, and divides the accommodating chamber into a first flow guide chamber and a second flow guide chamber, the electrochemical catalytic device comprises a first enclosure, a second enclosure, and a plurality of electrochemical catalytic units located between the first enclosure and the second enclosure, the first enclosure is used to separate the first flow guide chamber and the electrochemical catalytic unit, and the bottom of the first flow guide chamber and the electrochemical catalytic unit are connected, the bottom of the second enclosure is connected to the bottom of the filter chamber, and is used to separate the second flow guide chamber from the first flow guide chamber and the electrochemical catalytic unit; The top of the first flow guide chamber is connected to the water outlet, the top of the electrochemical catalytic unit is connected to the top of the second flow guide chamber, and the bottom of the second flow guide chamber is connected to the bottom of the filter chamber.

2. The integrated nickel sulfamate wastewater treatment system according to claim 1 is characterized in that: The electrochemical catalytic unit is a columnar structure, including a column core and a ring column surrounding the column core, wherein: the column core is a negative electrode and the ring column is a positive electrode, or the column core is a positive electrode and the ring column is a negative electrode.

3. The integrated nickel sulfamate wastewater treatment system according to claim 1, characterized in that: The electrochemical catalytic unit is a sheet structure, comprising a positive electrode sheet and a negative electrode sheet, wherein the positive electrode sheet and the negative electrode sheet are arranged in parallel and opposite to each other.

4. The integrated nickel sulfamate wastewater treatment system according to claim 1, characterized in that: A grille is arranged at the position of the water outlet.

5. The integrated nickel sulfamate wastewater treatment system according to claim 1, characterized in that: A blocking portion is provided at a position where the second enclosure wall is connected to the filter chamber.

6. The integrated nickel sulfamate wastewater treatment system according to claim 5, characterized in that: The surface of the blocking portion is an inclined surface or a curved surface.

7. The integrated nickel sulfamate wastewater treatment system according to claim 1, characterized in that: The bottom of the filter chamber is also connected with a backwash water inlet and a backwash air inlet.

8. The integrated nickel sulfamate wastewater treatment system according to claim 7, characterized in that: The backwash water inlet is connected to the water storage unit flowing out from the overflow weir.

9. The integrated nickel sulfamate wastewater treatment system according to claim 1, characterized in that: The particle size of the filter filler increases gradually from top to bottom.

10. The integrated nickel sulfamate wastewater treatment system according to claim 1, characterized in that: The filter fillers are fine sand, medium sand, coarse sand, small-grain gravel, medium-small-grain gravel, medium-grain gravel, and large-grain gravel from top to bottom.

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