Centralized control area electroplating tail water treatment system

Abstract

The utility model relates to a centralized control area electroplating tail water treatment system which comprises a reaction tank, a chemical tank and a water pump, the reaction tank is used for receiving a plurality of strands of electroplating tail water, and the chemical tank is used for containing a sodium hypochlorite solution; and the water pump is used for pumping the sodium hypochlorite solution in the chemical tank into the reaction tank. In the application, the electroplating tail water of an electroplating enterprise contains a small amount of cyanide, and the mixed electroplating tail water is intensively collected into the reaction tank by a sewage plant and then intensively treated, so that the treatment difficulty of the sewage plant is reduced; and meanwhile, front-end emergency treatment of cyanide of a sewage plant is converted into rear-end normalized treatment, so that daily operation of the sewage plant is facilitated.

Description

Technical Field

[0001] This application relates to the technical field of sewage treatment, and particularly to an electroplating wastewater treatment system in a centralized control area. Background Art

[0002] In electroplating industrial parks, electroplating enterprises need to classify electroplating wastewater and transport it to a sewage treatment plant through special pipelines for treatment.

[0003] However, due to management problems, work operations, or electroplating equipment problems in some electroplating enterprises, different types of electroplating wastewater are mixed in a single pipeline and transported to the sewage treatment plant. If the mixed electroplating wastewater contains pollutants such as cyanide, the sewage treatment plant needs to immediately initiate emergency treatment to prevent the outflow of cyanide from the sewage treatment plant.

[0004] However, when a sewage treatment plant is connected to the sewage discharge pipes of several electroplating enterprises, it is difficult for the sewage treatment plant to identify which electroplating enterprise's electroplating wastewater contains cyanide. Therefore, it is difficult to treat cyanide in electroplating wastewater at the front end of the wastewater treatment process. Utility Model Content

[0005] To facilitate the sewage treatment plant in treating electroplating wastewater, this application provides an electroplating wastewater treatment system in a centralized control area.

[0006] The electroplating wastewater treatment system in a centralized control area provided by this application adopts the following technical solutions:

[0007] An electroplating wastewater treatment system in a centralized control area includes a reaction tank, a chemical tank, and a water pump; the reaction tank is used to receive several streams of electroplating wastewater, the chemical tank is used to store sodium hypochlorite solution; the water pump is used to pump the sodium hypochlorite solution in the chemical tank into the reaction tank.

[0008] By adopting the above technical solutions, the sewage treatment plant uniformly collects the electroplating wastewater from different electroplating enterprises into the reaction tank at the back end, so that the electroplating wastewater containing cyanide is uniformly treated in the reaction tank at the back end. Utilize the reaction of sodium hypochlorite with cyanide and ammonia nitrogen compounds to eliminate cyanide and ammonia nitrogen compounds in the electroplating wastewater; improve the water quality after sewage treatment.

[0009] That is, when the electroplating wastewater of an electroplating enterprise contains a small amount of cyanide, the mixed electroplating wastewater is centrally collected into the reaction tank and then centrally treated, which is beneficial to reducing the treatment difficulty of the sewage treatment plant; at the same time, transforming the front-end emergency treatment of cyanide in the sewage treatment plant into the back-end normal treatment is beneficial to the daily operation of the sewage treatment plant.

[0010] Optionally, it further includes a flow disturbing mechanism, which includes a first blower, a first airbag and a first iron chain; the first airbag is arranged in the electroplating tail water of the reaction tank, and the first airbag is connected to the tank wall of the reaction tank through the first iron chain; the first blower is arranged on the ground, and the first blower is connected to the first airbag, and the first blower is used for inflating and deflating the first airbag.

[0011] By adopting the above technical solution, the volume of the first airbag is changed by inflating and deflating the first airbag to promote the flow of the electroplating tail water in the reaction tank, so as to improve the mixing and contact of sodium hypochlorite and cyanide in the electroplating tail water.

[0012] Optionally, the flow disturbing mechanism further includes a second blower, a second airbag and a second iron chain; the second airbag is arranged in the electroplating tail water of the reaction tank, and the second airbag is connected to the tank wall of the reaction tank through the second iron chain, and the first airbag and the second airbag are arranged opposite to each other; the second blower is connected to the second airbag, and the second blower is used for inflating and deflating the second airbag, and the first blower and the second blower work alternately.

[0013] By adopting the above technical solution, the volume of the second airbag is changed by inflating and deflating the second airbag to promote the flow of the electroplating tail water in the reaction tank, so as to improve the mixing and contact of sodium hypochlorite and cyanide in the electroplating tail water.

[0014] Optionally, it further includes a partition wall, which is arranged in the reaction tank and is fixedly connected to the bottom wall and the side wall of the reaction tank; the first airbag and the second airbag are arranged on both sides of the partition wall, and the partition wall is provided with a plurality of communication holes for the electroplating tail water to pass through.

[0015] By adopting the above technical solution, when the electroplating tail water flows, the communication holes of the partition wall can further disturb the electroplating tail water to further improve the contact between sodium hypochlorite and cyanide in the electroplating tail water.

[0016] Optionally, along the direction away from the bottom wall of the reaction tank, the diameter of the communication hole decreases.

[0017] By adopting the above technical solution, the diameter of the communication hole decreases from top to bottom, which is beneficial to increasing the water flow velocity at the bottom of the reaction tank to further promote the disturbance and upwelling of the electroplating tail water at the bottom of the reaction tank.

[0018] Optionally, it further includes an observation mechanism, which includes a buoy and a flexible rope; one end of the flexible rope is fixedly connected to the partition wall, and the other end of the flexible rope is fixedly connected to the buoy, and the buoy floats on the electroplating tail water surface of the reaction tank.

[0019] By adopting the above technical solution, the buoy floats on the electroplating tail water surface of the reaction tank; thus, it is convenient for the staff to observe the flow condition of the electroplating tail water in the reaction tank to control the operation of the first blower and the second blower.

[0020] Optionally, it further includes a discharge tank and a discharge monitoring tank. Along the sewage flow direction, the sewage flows through the reaction tank, the discharge tank and the discharge monitoring tank in sequence; the discharge tank is used for temporarily storing the sewage flowing through the reaction tank.

[0021] By adopting the above technical solution, if the cyanide content does not meet the discharge standard, the staff will add sodium hypochlorite drugs into the discharge monitoring tank to make the cyanide index in the electroplating tail water meet the discharge standard. When the staff adds sodium hypochlorite drugs into the discharge monitoring tank, the discharge tank can be used to receive the electroplating tail water treated by the reaction tank to ensure the continuous operation of the electroplating tail water treatment system.

[0022] Optionally, it further includes a third blower, and the third blower is used for conveying gas into the discharge monitoring tank.

[0023] By adopting the above technical solution, the third blower conveys gas into the discharge monitoring tank to promote the full mixing and reaction of sodium hypochlorite and cyanide in the electroplating tail water.

[0024] In summary, the present application includes at least one of the following beneficial technical effects:

[0025] 1. The sewage treatment plant uniformly collects the electroplating tail water of different electroplating enterprises into the reaction tank at the back end, so that the electroplating tail water containing cyanide is uniformly treated in the reaction tank at the back end. Utilizing that sodium hypochlorite reacts with cyanide and ammonia nitrogen compounds to eliminate cyanide and ammonia nitrogen compounds in the electroplating tail water; improving the water quality after sewage treatment;

[0026] 2. Utilizing the inflation and deflation of the first airbag to change the volume of the first airbag to promote the flow of the electroplating tail water in the reaction tank to improve the mixing and contact of sodium hypochlorite and cyanide in the electroplating tail water;

[0027] 3. When the electroplating tail water flows, the communication holes of the partition wall can further disturb the electroplating tail water to further improve the contact of sodium hypochlorite and cyanide in the electroplating tail water. Description of the Drawings

[0028] Figure 1 It is a schematic structural diagram of the electroplating tail water treatment system in Embodiment 1.

[0029] Figure 2 It is a schematic structural diagram of the first state of the electroplating tail water treatment system in Embodiment 2.

[0030] Figure 3It is a schematic structural diagram of the second state of the electroplating wastewater treatment system in Embodiment 2.

[0031] Explanation of reference numerals: 1, reaction tank; 2, discharge tank; 3, discharge monitoring tank; 4, chemical tank; 5, water pump; 6, third blower; 7, flow disturbance mechanism; 71, first flow disturbance component; 711, first blower; 712, first airbag; 713, first iron chain; 72, second flow disturbance component; 721, second blower; 722, second airbag; 723, second iron chain; 8, observation mechanism; 81, buoy; 82, flexible rope; 9, partition wall; 91, communication hole. Detailed implementation manners

[0032] The following will further elaborate on this application Figures 1-3 in conjunction with the appended drawings.

[0033] Embodiment 1

[0034] The embodiment of this application discloses a centralized control area electroplating wastewater treatment system. The electroplating wastewater treatment system is used to treat the electroplating wastewater of electroplating enterprises.

[0035] In the prior art, electroplating enterprises transport it to the sewage treatment plant through special pipelines. However, due to management problems, work operations, or electroplating equipment problems in some electroplating enterprises, different types of electroplating wastewater are mixed in one pipeline and transported to the sewage treatment plant.

[0036] If the mixed electroplating wastewater contains pollutants such as cyanide, the sewage treatment plant needs to immediately start emergency treatment to prevent the cyanide from flowing out of the sewage treatment plant. A sewage treatment plant is connected to the sewage discharge pipes of several electroplating enterprises, and it is difficult for the sewage treatment plant to identify which electroplating enterprise's electroplating wastewater contains cyanide.

[0037] Therefore, this application provides a centralized control area electroplating wastewater treatment system to solve the problem of pollutants such as cyanide in electroplating wastewater.

[0038] Referring to Figure 1 , along the flow direction of the electroplating wastewater (also known as sewage), the centralized control area electroplating wastewater treatment system sequentially includes a reaction tank 1, a discharge tank 2, and a discharge monitoring tank 3. In addition, the electroplating wastewater treatment system also includes a chemical tank 4, a water pump 5, and a third blower 6.

[0039] The reaction tank 1 is used to receive several streams of electroplating wastewater. The electroplating wastewater in the reaction tank 1 can also be electroplating wastewater that has been treated through other processes. That is, the electroplating wastewater containing cyanide and the electroplating wastewater without cyanide are discharged into the reaction tank 1 together; thus, the cyanide in the electroplating wastewater is uniformly treated in the reaction tank 1.

[0040] The chemical tank 4 is used to hold the sodium hypochlorite solution, and the water pump 5 is used to pump the sodium hypochlorite solution in the chemical tank 4 to the reaction tank 1. The sodium hypochlorite in the sodium hypochlorite solution will react with cyanide and ammonia nitrogen compounds, thereby eliminating cyanide and ammonia nitrogen compounds in the electroplating tail water and improving the water quality after sewage treatment.

[0041] Subsequently, the electroplating tail water treated in the reaction tank 1 is transported to the discharge tank 2 for temporary storage; when the electroplating tail water in the discharge tank 2 reaches the designed water level, the electroplating tail water is transported to the discharge monitoring tank 3. Then, staff manually detect the cyanide content in the electroplating tail water.

[0042] If the cyanide content meets the discharge standard, the discharge monitoring pool 3 can discharge the electroplating tail water in the form of discharge volume.

[0043] If the cyanide content does not meet the emission standards, the staff will put sodium hypochlorite into the emission monitoring pool 3 to make the cyanide index in the electroplating tail water meet the emission standards. At this time, the staff can transport gas to the emission monitoring pool 3 through the third blower 6 to promote the full mixing and reaction of sodium hypochlorite and cyanide in the electroplating tail water. When the staff adds sodium hypochlorite to the emission monitoring pool 3, the discharge pool 2 can be used to receive the electroplating tail water treated by the reaction pool 1 to ensure the continuous operation of the electroplating tail water treatment system.

[0044] The implementation principle of a centralized control area electroplating tail water treatment system in the present application embodiment is:

[0045] The embodiment of the present application collects the electroplating tail water of different electroplating enterprises into the reaction tank 1 at the rear end, so that the electroplating tail water containing cyanide is uniformly treated in the reaction tank 1 at the rear end. Thereby, the front-end emergency treatment of cyanide in the sewage treatment plant is transformed into the normalized treatment at the rear end, which is beneficial to the daily operation of the sewage treatment plant. At the same time, it also reduces the workload of the staff in the front-end detection of the electroplating tail water of the electroplating enterprise to determine whether the electroplating tail water discharged by the enterprise contains cyanide; therefore, when the electroplating tail water of the electroplating enterprise contains a small amount of cyanide, the electroplating tail water after mixed discharge is collected in the reaction tank 1, and then processed in a centralized manner, which is beneficial to reduce the treatment difficulty of the sewage treatment plant.

[0046] Example 2

[0047] The difference between this embodiment 2 and embodiment 1 is that:

[0048] In the reaction tank 1, the treatment result of cyanide depends on the contact reaction between sodium hypochlorite and cyanide. However, due to the poor fluidity of the electroplating tail water in the reaction tank 1, it is difficult for sodium hypochlorite and cyanide to mix evenly, thereby affecting the treatment time and treatment effect of cyanide in the reaction tank 1. Therefore, this embodiment further improves the electroplating tail water treatment system.

[0049] Refer to Figure 2 and Figure 3 , the electroplating wastewater treatment system further includes a flow disturbance mechanism 7 and an observation mechanism 8.

[0050] Refer to Figure 2 and Figure 3 , meanwhile, the reaction tank 1 further includes a partition wall 9. The partition wall 9 is arranged inside the reaction tank 1 and is fixedly connected to the bottom wall and the side wall of the reaction tank 1. The partition wall 9 is provided with a plurality of communication holes 91 for the electroplating wastewater to pass through, and along the direction away from the bottom wall of the reaction tank 1, the diameter of the communication holes 91 decreases. In this embodiment, the partition wall 9 is a concrete wall.

[0051] Refer to Figure 2 and Figure 3 , the flow disturbance mechanism 7 includes a first flow disturbance component 71 and a second flow disturbance component 72 which are arranged oppositely. The first flow disturbance component 71 and the second flow disturbance component 72 are arranged on both sides of the partition wall 9.

[0052] Refer to Figure 2 and Figure 3 , the first flow disturbance component 71 includes a first blower 711, a first airbag 712 and a first iron chain 713; the first airbag 712 is arranged in the electroplating wastewater in the reaction tank 1, and the first airbag 712 is connected to the wall of the reaction tank 1 through the first iron chain 713; the first blower 711 is arranged on the ground, the first blower 711 is connected to the first airbag 712, and the first blower 711 is used for inflating and deflating the first airbag 712.

[0053] Refer to Figure 2 and Figure 3 , the second flow disturbance component 72 includes a second blower 721, a second airbag 722 and a second iron chain 723; the second airbag 722 is arranged in the electroplating wastewater in the reaction tank 1, and the second airbag 722 is connected to the wall of the reaction tank 1 through the second iron chain 723, and the first airbag 712 and the second airbag 722 are arranged oppositely; the second blower 721 is connected to the second airbag, and the second blower 721 is used for inflating and deflating the second airbag.

[0054] The first blower 711 and the second blower 721 work alternately to realize the alternate expansion or contraction of the first airbag 712 and the second airbag 722.

[0055] Refer to Figure 2 , when the first airbag 712 is inflated and expands, and the second airbag 722 is deflated and shrinks; the electroplating wastewater flows from the left side to the right side of the reaction tank 1. And the electroplating wastewater on the left side in the reaction tank 1 passes through the communication holes 91 of the partition wall 9 and flows to the right side area in the reaction tank 1. Thus, the electroplating wastewater in the reaction tank 1 flows sufficiently to improve the mixing degree of sodium hypochlorite and cyanide.

[0056] Referring to Figure 3 , when the volume of the first airbag 712 shrinks due to deflation and the volume of the second airbag 722 expands due to inflation; the electroplating tail water flows from the right side to the left side of the reaction tank 1. And the electroplating tail water on the right side in the reaction tank 1 passes through the communication holes 91 of the partition wall 9 and flows to the left area in the reaction tank 1.

[0057] Referring to Figure 2 and Figure 3 , that is, through the alternating cooperation of the first flow disturbing component 71 and the second flow disturbing component 72, the electroplating tail water in the reaction tank 1 flows back and forth left and right, so as to improve the contact between sodium hypochlorite and cyanide in the electroplating tail water, reduce the treatment time of cyanide in the reaction tank 1, and improve the treatment effect of cyanide in the reaction tank 1.

[0058] Referring to Figure 2 and Figure 3 , and the communication holes 91 of the partition wall 9 can further disturb the electroplating tail water to further improve the contact between sodium hypochlorite and cyanide in the electroplating tail water. The diameter of the communication holes 91 decreases from top to bottom, which is beneficial to increasing the water flow velocity at the bottom of the reaction tank 1, so as to further promote the disturbance and surging of the electroplating tail water at the bottom of the reaction tank 1.

[0059] Referring to Figure 2 and Figure 3 , the observation mechanism 8 includes a buoy 81 and a flexible rope 82; one end of the flexible rope 82 is fixedly connected to the partition wall 9, and the other end of the flexible rope 82 is fixedly connected to the buoy 81, and the buoy 81 floats on the electroplating tail water surface of the reaction tank 1; thus facilitating the staff to observe the flow condition of the electroplating tail water in the reaction tank 1 to control the operation of the first blower 711 and the second blower 721.

[0060] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A centralized control area electroplating tail water treatment system, characterized by: The invention comprises a reaction pool (1), a chemical pool (4) and a water pump (5); the reaction pool (1) is used to receive a plurality of electroplating tail waters, the chemical pool (4) is used to contain a sodium hypochlorite solution; and the water pump (5) is used to pump the sodium hypochlorite solution in the chemical pool (4) into the reaction pool (1).

2. The electroplating tail water treatment system in the centralized control area according to claim 1 is characterized by: The invention also includes a spoiler mechanism (7), wherein the spoiler mechanism (7) includes a first blower (711), a first air bag (712) and a first iron chain (713); the first air bag (712) is arranged in the electroplating tail water of the reaction tank (1), and the first air bag (712) is connected to the pool wall of the reaction tank (1) through the first iron chain (713); the first blower (711) is arranged on the ground, the first blower (711) is connected to the first air bag (712), and the first blower (711) is used to inflate and deflate the first air bag (712).

3. The electroplating tail water treatment system in the centralized control area according to claim 2 is characterized in that: The spoiler mechanism (7) further comprises a second blower (721), a second airbag (722) and a second iron chain (723); the second airbag (722) is arranged in the electroplating tail water of the reaction tank (1), and the second airbag (722) is connected to the pool wall of the reaction tank (1) via the second iron chain (723); the first airbag (712) and the second airbag (722) are arranged opposite to each other; the second blower (721) is connected to the second airbag, the second blower (721) is used to inflate and deflate the second airbag, and the first blower (711) and the second blower (721) work alternately.

4. The electroplating tail water treatment system in the centralized control area according to claim 3 is characterized by: It also includes a partition wall (9), the partition wall (9) is arranged in the reaction pool (1), and the partition wall (9) is fixedly connected to the bottom wall and the side wall of the reaction pool (1); the first air bag (712) and the second air bag (722) are arranged on both sides of the partition wall (9), and the partition wall (9) is provided with a plurality of connecting holes (91) for the electroplating tail water to pass through.

5. The electroplating tail water treatment system in the centralized control area according to claim 4 is characterized in that: Along the direction away from the bottom wall of the reaction pool (1), the diameter of the connecting hole (91) decreases.

6. The electroplating tail water treatment system in the centralized control area according to claim 4 is characterized by: It also includes an observation mechanism (8), the observation mechanism (8) including a buoy (81) and a flexible rope (82); one end of the flexible rope (82) is fixedly connected to the partition wall (9), and the other end of the flexible rope (82) is fixedly connected to the buoy (81), and the buoy (81) floats on the surface of the electroplating tail water of the reaction tank (1).

7. The electroplating tail water treatment system in the centralized control area according to claim 1 is characterized by: It also comprises a discharge tank (2) and a discharge monitoring tank (3). Along the flow direction of the sewage, the sewage flows through the reaction tank (1), the discharge tank (2) and the discharge monitoring tank (3) in sequence; the discharge tank (2) is used to temporarily store the sewage flowing through the reaction tank (1).

8. The electroplating tail water treatment system in the centralized control area according to claim 7 is characterized in that: It also includes a third blower (6), wherein the third blower (6) is used to transport gas into the emission monitoring pool (3).

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