Treatment equipment for chemical nickel plating wastewater

Abstract

The utility model discloses chemical nickel plating wastewater treatment equipment which comprises a front wastewater adjusting tank, an outlet of the front wastewater adjusting tank is connected with a pretreatment tank through a pipeline I, an outlet of the pretreatment tank is connected with a front radial-flow type sedimentation tank through a pipeline II, and a sewage outlet of the front radial-flow type sedimentation tank is connected with a comprehensive wastewater adjusting tank through a pipeline III. An outlet of the comprehensive wastewater regulating tank is connected with a neutralization tank through a pipeline IV, an outlet of the neutralization tank is connected with a contact oxidation tank through a pipeline V, an outlet of the contact oxidation tank is connected with a rear radial-flow sedimentation tank through a pipeline VI, and a sewage outlet of the rear radial-flow sedimentation tank is connected with a sand filtration filter through a pipeline VII; the chemical nickel-plating wastewater treatment equipment disclosed by the utility model has a better purification and removal effect on various metal ions, organic matters and other chemical substances in nickel-containing wastewater, and the influence on water resources and ecological environment after discharge is avoided.

Description

Technical Field

[0001] This utility model relates to the technical field of wastewater treatment equipment, specifically to equipment for treating chemical nickel plating wastewater. Background Technology

[0002] In the process of electroless nickel plating, a nickel plating solution containing nickel ions is usually used, which transfers the nickel ions to the surface of the workpiece, thereby giving the metal surface corrosion resistance and aesthetics.

[0003] However, the electroless nickel plating process generates a large amount of wastewater containing various metal ions, organic matter, and other chemicals. This wastewater needs to be treated to reduce pollution and harm to the environment, but existing nickel plating wastewater treatment equipment has the following drawbacks:

[0004] (1) Existing treatment equipment does not remove pollutants from nickel plating wastewater thoroughly enough, and its discharge will have an impact on water resources and the ecological environment;

[0005] (2) Existing treatment equipment is not effective in treating the sludge in nickel plating wastewater, and the discharge is likely to pollute the environment. Utility Model Content

[0006] The purpose of this utility model is to provide a treatment device for chemical nickel plating wastewater, so as to solve the problems mentioned in the background art that the existing treatment devices do not remove pollutants from nickel plating wastewater thoroughly enough, which will affect water resources and the ecological environment after discharge, and the sludge in nickel plating wastewater is not effectively treated, which will easily pollute the environment after discharge.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a treatment device for chemical nickel plating wastewater, comprising a pre-wastewater equalization tank, the outlet of which is connected to a pre-treatment tank via pipe one, the outlet of which is connected to a pre-radial flow sedimentation tank via pipe two, the wastewater outlet of which is connected to a comprehensive wastewater equalization tank via pipe three, the outlet of which is connected to a neutralization tank via pipe four, the outlet of which is connected to a contact oxidation tank via pipe five, the outlet of which is connected to a post-radial flow sedimentation tank via pipe six, the wastewater outlet of which is connected to a sand filter via pipe seven, the outlet of which is connected to a reverse osmosis membrane separation unit via pipe eight, and the outlet of which is connected to an ozone disinfection tank via pipe nine.

[0008] When using the chemical nickel plating wastewater treatment equipment of this technical solution, the equipment has a good purification and removal effect on various metal ions, organic matter and other chemical substances in nickel-containing wastewater, avoiding the impact on water resources and ecological environment after discharge.

[0009] In a preferred embodiment of this invention, the outlet of the ozone disinfection tank is connected to a metering discharge tank via a pipe. The metering discharge tank allows for the planned discharge of purified water that meets emission standards.

[0010] In a preferred embodiment of this invention, a sludge pump is installed at the sludge outlet of the pre-radial flow sedimentation tank. The output end of the sludge pump is connected to a sludge thickening tank via pipe eleven. A sludge pump is installed at the sludge outlet of the post-radial flow sedimentation tank, and the output end of the sludge pump is connected to the sludge thickening tank via pipe twelve. The sludge pumps transport the sludge from the sedimentation tank to the sludge thickening tank.

[0011] In a preferred embodiment of this invention, the pretreatment tank includes a pH adjustment tank, a coagulation reaction tank, and a flocculation reaction tank, which are arranged in parallel in sequence. The pretreatment tank performs pH adjustment, coagulation reaction, and flocculation reaction treatments on nickel-containing wastewater.

[0012] In a preferred embodiment of this invention, the outlet of the sludge thickening tank is connected to a sludge diaphragm pump via pipe thirteen. The sludge diaphragm pump is used to transport the compressed sludge.

[0013] In a preferred embodiment of this invention, the output end of the sludge diaphragm pump is connected to a filter press via pipe fourteen. The filter press can separate the sludge into filtrate and sludge cake.

[0014] In a preferred embodiment of this invention, the inlet of the pre-wastewater equalization tank is connected to a nickel-containing wastewater inlet pipe. Nickel-containing wastewater is then introduced into the treatment equipment through this inlet pipe.

[0015] In a preferred embodiment of this invention, the outlet of the metering discharge tank is connected to a compliant water outlet pipe. Purified water is discharged from the equipment through this pipe.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. This chemical nickel plating wastewater treatment equipment has a good purification and removal effect on various metal ions, organic matter and other chemical substances in nickel-containing wastewater, avoiding the impact on water resources and ecological environment after discharge;

[0018] 2. This chemical nickel plating wastewater treatment equipment, by setting up a sludge thickening tank and a filter press, can return the filtrate in the filtered sludge to the equalization tank for repeated filtration, and transport the sludge cake for recycling and treatment. It has a better treatment effect on the filtered sludge and avoids environmental pollution. Attached Figure Description

[0019] Figure 1This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the pretreatment tank of this utility model;

[0021] Figure 3 This is a schematic diagram of the front radial flow sedimentation tank of this utility model;

[0022] Figure 4 This is a schematic diagram of the structure of the post-radial flow sedimentation tank of this utility model.

[0023] In the diagram: 1. Pre-wastewater equalization tank; 2. Pretreatment tank; 201. pH adjustment tank; 202. Coagulation reaction tank; 203. Flocculation reaction tank; 3. Pre-radial flow sedimentation tank; 4. Integrated wastewater equalization tank; 5. Neutralization tank; 6. Contact oxidation tank; 7. Post-radial flow sedimentation tank; 8. Metering discharge tank; 9. Sludge thickening tank; 10. Sludge diaphragm pump; 11. Filter press; 12. Sludge pump one; 13. Sludge pump two; 14. Sand filter tank; 15. Reverse osmosis membrane separation unit; 16. Ozone disinfection tank; 17. Nickel-containing wastewater inlet pipe; 18. Standard-compliant water outlet pipe. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figure 1-4 This utility model provides a treatment device for chemical nickel plating wastewater, including a pre-wastewater equalization tank 1. The outlet of the pre-wastewater equalization tank 1 is connected to a pre-treatment tank 2 via a pipe 1. The outlet of the pre-treatment tank 2 is connected to a pre-radial flow sedimentation tank 3 via a pipe 2 to separate sediment and wastewater. The wastewater outlet of the pre-radial flow sedimentation tank 3 is connected to a comprehensive wastewater equalization tank 4 via a pipe 3. The outlet of the comprehensive wastewater equalization tank 4 is connected to a neutralization tank 5 via a pipe 4 to neutralize the pH value of the wastewater. The outlet of the neutralization tank 5 is connected to a contact oxidation tank 6 via a pipe 5. The outlet of the contact oxidation tank 6 is connected to a post-radial flow sedimentation tank 7 via a pipe 6. The wastewater outlet of the post-radial flow sedimentation tank 7 is connected to a sand filter tank 14 via a pipe 7. The outlet of the sand filter tank 14 is connected to a reverse osmosis membrane separation unit 15 via a pipe 8 to improve water quality. The outlet of the reverse osmosis membrane separation unit 15 is connected to an ozone disinfection tank 16 via a pipe 9 to disinfect the water.

[0026] In operation, wastewater from the pre-wastewater equalization tank 1 enters the pretreatment tank 2 to adjust the pH value of the nickel-containing wastewater and to carry out coagulation and flocculation reactions. Then, it enters the pre-radial flow sedimentation tank 3 to remove heavy metal pollutants, suspended solids, and precipitates. The wastewater is then transported to the integrated wastewater equalization tank 4, and then to the neutralization tank 5, where sulfuric acid is added to neutralize acidic or alkaline substances in the wastewater. It is then transported to the contact oxidation tank 6 to oxidize organic matter and other recalcitrant pollutants in the wastewater. After that, it is transported to the post-radial flow sedimentation tank 7 for secondary sedimentation treatment. The wastewater is then transported to the sand filter tank 14 to further remove suspended solids and precipitates from the wastewater. It is then transported to the reverse osmosis membrane separation unit 15 to remove dissolved salts and organic matter from the wastewater, and finally enters the ozone disinfection tank 16 to kill bacteria and microorganisms in the wastewater.

[0027] The outlet of the ozone disinfection tank 16 is connected to the metering discharge tank 8 via a pipe 10. The pretreatment tank 2 includes a pH adjustment tank 201, a coagulation reaction tank 202, and a flocculation reaction tank 203, which are arranged in parallel in sequence for wastewater pretreatment. The inlet of the pre-wastewater conditioning tank 1 is connected to a nickel-containing wastewater inlet pipe 17 for inputting nickel-containing wastewater. The outlet of the metering discharge tank 8 is connected to a qualified water outlet pipe 18 for discharging purified water.

[0028] In use, nickel-containing wastewater is transported from the nickel-containing wastewater inlet pipe 17 to the pretreatment tank 2 inside the device. After entering the pretreatment tank 2, NaOH / Na2S, FeCl3 and PAM are added to the pH adjustment tank 201, coagulation reaction tank 202 and flocculation reaction tank 203 respectively to adjust the pH value of the nickel-containing wastewater and carry out coagulation and flocculation reactions. Finally, the treated and purified water is placed into the metering discharge tank 8 and discharged from the qualified water outlet pipe 18 in a planned manner.

[0029] The sludge outlet of the front radial flow sedimentation tank 3 is equipped with a sludge pump 12. The output end of the sludge pump 12 is connected to the sludge thickening tank 9 through pipe 11. The sludge outlet of the rear radial flow sedimentation tank 7 is equipped with a sludge pump 23. The output end of the sludge pump 23 is connected to the sludge thickening tank 9 through pipe 12. The outlet of the sludge thickening tank 9 is connected to a sludge diaphragm pump 10 through pipe 13. The output end of the sludge diaphragm pump 10 is connected to a filter press 11 through pipe 14 for sludge filtration.

[0030] In use, the settled sludge in the radial flow sedimentation tank is transported to the sludge thickening tank 9 by a sludge pump. The supernatant in the sludge thickening tank 9 is returned to the equalization tank, while the thickened sludge is transported to the filter press 11 by a sludge diaphragm pump 10. The filtrate is returned to the equalization tank, and the filter cake is transported off-site for recycling.

[0031] In practical use, the chemical nickel plating wastewater treatment equipment of this invention transports nickel-containing wastewater to the pre-wastewater equalization tank 1, then into the pretreatment tank 2. NaOH / Na2S, FeCl3, and PAM are added to the pH adjustment tank 201, coagulation reaction tank 202, and flocculation reaction tank 203 respectively to adjust the pH value of the nickel-containing wastewater and to carry out coagulation and flocculation reactions. Then, it enters the pre-radial flow sedimentation tank 3 to remove heavy metal pollutants, suspended solids, and precipitates. The wastewater is then transported to the integrated wastewater equalization tank 4, while the settled sludge is transported to the sludge thickening tank 9 via sludge pump 12. The wastewater in the integrated wastewater equalization tank 4 is then transported to the neutralization tank 5, where sulfuric acid is added to neutralize acidic or alkaline substances in the wastewater before it is transported... The wastewater is then transported to the contact oxidation tank 6 to oxidize organic matter and other recalcitrant pollutants, and then to the post-radial flow sedimentation tank 7 for secondary sedimentation treatment. The wastewater is then transported to the sand filter tank 14, while the sludge is transported to the sludge thickening tank 9 by the sludge pump 13. The sand filter tank 14 further removes suspended solids and sediments from the wastewater, and then it is transported to the reverse osmosis membrane separation unit 15 to remove dissolved salts and organic matter from the wastewater. It then enters the ozone disinfection tank 16 to kill bacteria and microorganisms in the wastewater, and finally discharged through the metering discharge tank 8. The supernatant from the sludge thickening tank 9 is returned to the equalization tank, while the thickened sludge is transported to the filter press 11 by the sludge diaphragm pump 10. The filtrate is returned to the equalization tank, and the filter cake is transported off-site for recycling.

[0032] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An apparatus for treating electroless nickel plating wastewater, comprising a front wastewater conditioning tank (1), characterized in that: The outlet of the front wastewater conditioning tank (1) is connected with a pretreatment tank (2) through pipeline one, the outlet of the pretreatment tank (2) is connected with a front radial flow sedimentation tank (3) through pipeline two, the sewage outlet of the front radial flow sedimentation tank (3) is connected with a comprehensive wastewater conditioning tank (4) through pipeline three, the outlet of the comprehensive wastewater conditioning tank (4) is connected with a neutralization tank (5) through pipeline four, the outlet of the neutralization tank (5) is connected with a contact oxidation tank (6) through pipeline five, the outlet of the contact oxidation tank (6) is connected with a back radial flow sedimentation tank (7) through pipeline six, the sewage outlet of the back radial flow sedimentation tank (7) is connected with a sand filter tank (14) through pipeline seven, the outlet of the sand filter tank (14) is connected with a reverse osmosis membrane separation unit (15) through pipeline eight, and the outlet of the reverse osmosis membrane separation unit (15) is connected with an ozone disinfection tank (16) through pipeline nine.

2. The apparatus for treating electroless nickel plating wastewater according to claim 1, characterized in that: The outlet of the ozone disinfection tank (16) is connected with a metering discharge tank (8) through pipeline ten.

3. The apparatus for treating electroless nickel plating wastewater according to claim 1, characterized in that: The sludge outlet of the front radial flow sedimentation tank (3) is provided with a sludge pump one (12), the output end of the sludge pump one (12) is connected with a sludge concentration tank (9) through pipeline eleven, the sludge outlet of the back radial flow sedimentation tank (7) is provided with a sludge pump two (13), and the output end of the sludge pump two (13) is connected with the sludge concentration tank (9) through pipeline twelve.

4. The apparatus for treating electroless nickel plating wastewater according to claim 1, characterized in that: The pretreatment tank (2) comprises a pH adjustment tank (201), a coagulation reaction tank (202) and a flocculation reaction tank (203), and the pH adjustment tank (201), the coagulation reaction tank (202) and the flocculation reaction tank (203) are arranged in parallel in sequence.

5. The apparatus for treating electroless nickel plating wastewater according to claim 3, characterized in that: The outlet of the sludge concentration tank (9) is connected with a sludge diaphragm pump (10) through pipeline thirteen.

6. The apparatus for treating electroless nickel plating wastewater according to claim 5, characterized in that: The output end of the sludge diaphragm pump (10) is connected with a filter press (11) through pipeline fourteen.

7. The apparatus for treating electroless nickel plating wastewater according to claim 1, characterized in that: The inlet of the front wastewater conditioning tank (1) is connected with a nickel-containing wastewater inlet pipe (17).

8. The apparatus for treating electroless nickel plating wastewater according to claim 2, characterized in that: The outlet of the metering discharge tank (8) is connected with a standard water outlet pipe (18).

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