Nickel-based wastewater treatment device

Abstract

The utility model discloses a nickel system waste water treatment device, relates to waste water treatment technical field, the nickel system waste water treatment device includes PH debugging mechanism, prefiltration component, ion exchange module, reverse osmosis unit, crystallization reutilization subassembly and chemical reaction component, PH debugging mechanism includes PH debugging pool, the PH debugging pool is provided with the stirring impeller in the suspension, the stirring impeller is equipped with the reverse osmosis unit, the reverse osmosis unit is equipped with the crystallization reutilization subassembly, and the chemical reaction component is equipped with the reverse osmosis unit. The stirring impeller is fixedly connected with the output end of the stirring motor, the stirring motor is fixed outside the PH adjusting pool, the output end of the PH adjusting pool is connected with the input end of the PH adjusting pool conveying pump, and most nickel is separated through ion exchange and reverse osmosis equipment. The waste water containing a small amount of nickel is added with the composite nano caustic soda liquid to reduce the small amount of nickel to generate a small amount of nickel sludge, the waste water treatment operation cost is greatly reduced, the separated nickel concentrated liquid is subjected to impurity removal, extraction and crystallization to obtain nickel sulfate crystals, and the nickel sulfate crystals can be used in the fields of electroplating industry, printing and dyeing industry, medical industry and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of wastewater treatment, in particular to a nickel-based wastewater treatment device. Background Art

[0002] Nickel belongs to the first category of pollutants and is required to be treated to meet the standards at the discharge outlet of the workshop or production facility. The treatment of nickel-containing wastewater is relatively difficult; the conventional treatment process requires the use of metabisulfite and calcium hydroxide to reduce and precipitate nickel-based wastewater, and the material cost is very high. A large amount of sludge is produced after precipitation and flocculation. The treatment fee of nickel-based sludge is high. Sludge is a hazardous waste, which is highly harmful to the environment and complex to dispose of. The amount of sludge accounts for one of the main costs of wastewater treatment operations.

[0003] For example, the nickel-based wastewater treatment device described in the patent announcement number CN206767804U includes a nickel collection and regulating tank, a safety filter, an ion resin exchange tower, a filter, an RO concentrated water tank, a hydrochloric acid barrel, a nickel regeneration liquid collection barrel, a chemical regulating barrel, a mud press and other components. It combines the advantages of strong adsorption capacity and high treatment compliance rate of ion exchange and liquid solidification and hazardous waste reduction of chemical precipitation. After the process is implemented, the nickel-containing wastewater in the flexible circuit board production process can be fully treated to meet the discharge requirements, and the filtered liquid after mud pressing and dehydration can be recovered and reprocessed to meet the wastewater discharge requirements.

[0004] However, the prior art has the following defects: although the patent improves the treatment efficiency of nickel wastewater, a large amount of sludge is still produced after treatment, and the nickel sludge treatment cost is high.

[0005] Based on this, a nickel-based wastewater treatment device is now provided, which can eliminate the disadvantages of existing devices. Utility Model Content

[0006] The purpose of the utility model is to provide a nickel-based wastewater treatment device to solve the problems in the background technology.

[0007] To achieve the above objectives, the present invention provides the following technical solutions:

[0008] A nickel-based wastewater treatment device comprises: a pH debugging mechanism, a pre-filtration component, an ion exchange module, a reverse osmosis unit, a crystallization recycling component and a chemical reaction component. The pH debugging mechanism comprises a pH debugging tank. A stirring impeller is suspended in the pH debugging tank. The stirring impeller is fixedly connected to the output end of a stirring motor. The stirring motor is fixed outside the pH debugging tank. The output end of the pH debugging tank is connected to the input end of a pH debugging tank delivery pump.

[0009] On the basis of the above technical solutions, the present invention also provides the following optional technical solutions:

[0010] In an optional solution: the pre-filtration component includes a filter, the filter input end is connected to the output end of the pH debugging tank delivery pump, the filter output end is connected to the input end of the filter delivery pump, and the output end of the filter delivery pump is connected to the input end of the ion exchange tower.

[0011] In an optional solution, the ion exchange module includes an ion exchange tower, in which an ion resin is provided, the output end of the ion exchange tower is connected to the input end of an ion exchange delivery pump, and the output end of the ion exchange delivery pump is connected to a reverse osmosis unit.

[0012] In an optional solution: the reverse osmosis unit includes a reverse osmosis box, a semipermeable membrane is provided in the reverse osmosis box, the semipermeable membrane divides the reverse osmosis box into a high-concentration nickel solution storage chamber and a low-concentration nickel solution storage chamber, the output end of the high-concentration nickel solution storage chamber is connected to the input end of the high-concentration nickel solution delivery pump, the output end of the low-concentration nickel solution storage chamber is connected to the input end of the low-concentration nickel solution delivery pump, and the output end of the low-concentration nickel solution delivery pump is connected to a chemical reaction component.

[0013] In an optional solution, the chemical reaction component includes a chemical reaction device, the input end of the chemical reaction device is connected to the output end of the low-concentration nickel solution delivery pump, and the lower end of the chemical reaction device is provided with a qualified water discharge port and a small amount of sludge discharge port.

[0014] In an optional scheme: the crystallization recycling component includes a nickel concentrate impurity removal device, the input end of the nickel concentrate impurity removal device is connected to the output end of the high-concentration nickel solution delivery pump, the output end of the nickel concentrate impurity removal device is connected to the input end of the impurity removal delivery pump, the output end of the impurity removal delivery pump is connected to the input end of the extraction box, the output end of the extraction box is connected to the input end of the extract delivery pump, the output end of the extract delivery pump is connected to the input end of the crystallization box, and the crystallization box is connected to an air pressure pump.

[0015] In an optional solution, control valves are provided at the outlets of the pH debugging tank, filter, ion exchange tower, reverse osmosis box, chemical reaction equipment, nickel concentrate impurity removal equipment, extraction box and crystallization box.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] The utility model separates most of the nickel through ion exchange and reverse osmosis equipment, and then reduces the small amount of nickel in the wastewater containing a small amount of nickel by adding composite nano-liquid alkali to produce a small amount of nickel-based sludge, thereby greatly reducing the operating cost of wastewater treatment. The separated nickel concentrate is then subjected to impurity removal, extraction, and crystallization to obtain nickel sulfate crystals, which can be used in the fields of electroplating industry, printing and dyeing industry, pharmaceutical industry, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural diagram of the present utility model.

[0019] Figure 2 This is a process flow chart of the utility model.

[0020] Notes on the accompanying drawings: 100, pH debugging tank, 101, stirring impeller, 102, stirring motor, 103, pH debugging tank delivery pump, 200, filter, 201, filter delivery pump, 300, control valve, 400, ion exchange tower, 401, ion resin, 402, ion exchange delivery pump, 500, reverse osmosis box, 501, semipermeable membrane, 502, high concentration nickel solution storage chamber, 503, low concentration nickel solution storage chamber, 504, low concentration nickel solution delivery pump, 505, high concentration nickel solution delivery pump, 600, chemical reaction equipment, 601, qualified water discharge outlet, 602, small amount of sludge discharge outlet, 700, nickel concentrate impurity removal equipment, 701, impurity removal delivery pump, 800, extraction box, 801, extract delivery pump, 900, crystallization box, 901, air pressure pump, 902, nickel sulfate crystallization outlet. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.

[0022] In one embodiment, Figure 1-Figure 2 As shown, a nickel-based wastewater treatment device includes: a pH debugging mechanism, a pre-filtration component, an ion exchange module, a reverse osmosis unit, a crystallization recycling component and a chemical reaction component. The pH debugging mechanism includes a pH debugging tank 100. A stirring impeller 101 is suspended in the pH debugging tank 100. The stirring impeller 101 is fixedly connected to the output end of a stirring motor 102. The stirring motor 102 is fixed outside the pH debugging tank 100. The output end of the pH debugging tank 100 is connected to the input end of a pH debugging tank delivery pump 103. The nickel-containing wastewater is mixed and stirred to adjust the water quality. The stirring impeller 101 is stirred by the stirring motor 102 to make the pH value reach and stabilize within a specific range, making it easier for nickel ions to be adsorbed or precipitated, thereby improving the removal efficiency.

[0023] In this embodiment, if Figure 1As shown, the pre-filtration component includes a filter 200, the input end of which is connected to the output end of the pH adjustment tank delivery pump 103, the output end of which is connected to the input end of the filter delivery pump 201, and the output end of the filter delivery pump 201 is connected to the ion exchange module. The filter 200 filters the nickel-containing wastewater after adjusting the pH value to remove impurities in the nickel-containing wastewater, and then delivers the filtered nickel-containing wastewater to the ion exchange module through the filter delivery pump 201.

[0024] In one embodiment, Figure 1 As shown, the ion exchange module includes an ion exchange tower 400, in which an ion resin 401 is provided. The output end of the ion exchange tower 400 is connected to the input end of the ion exchange delivery pump 402, and the output end of the ion exchange delivery pump 402 is connected to the reverse osmosis unit. The filtered nickel-containing wastewater enters the ion exchange tower 400 and is exchanged through the ion resin 401. The exchanged water can be reused as reclaimed water. The exchanged nickel concentrate enters the reverse osmosis unit through the ion exchange delivery pump 402.

[0025] In one embodiment, Figure 1 As shown, the reverse osmosis unit includes a reverse osmosis box 500, which is provided with a semipermeable membrane 501. The semipermeable membrane 501 divides the reverse osmosis box 500 into a high-concentration nickel solution storage chamber 502 and a low-concentration nickel solution storage chamber 503. The output end of the high-concentration nickel solution storage chamber 502 is connected to the input end of a high-concentration nickel solution delivery pump 505, and the output end of the low-concentration nickel solution storage chamber 503 is connected to the input end of a low-concentration nickel solution delivery pump 504. The output end of the low-concentration nickel solution delivery pump 504 is connected to a chemical reaction component. The semipermeable membrane 501 blocks most nickel ions in the high-concentration nickel solution storage chamber 502, while the low-concentration nickel solution after reverse osmosis is in the low-concentration nickel solution storage chamber 503. The low-concentration nickel solution is then delivered to the chemical reaction component by the low-concentration nickel solution delivery pump 504.

[0026] In one embodiment, Figure 1 As shown, the chemical reaction component includes a chemical reaction device 600, the input end of the chemical reaction device 600 is connected to the output end of the low-concentration nickel solution delivery pump 504, and the lower end of the chemical reaction device 600 is provided with a qualified water discharge port 601 and a small amount of sludge discharge port 602. By adding composite nano-liquid alkali to the low-concentration nickel solution entering the chemical reaction device 600, a small amount of nickel in the low-concentration nickel solution is reduced to produce nickel-based sludge. The small amount of nickel-based sludge greatly reduces the operating cost of wastewater treatment, and the wastewater that meets the standards is discharged.

[0027] In one embodiment, Figure 1As shown, the crystallization recycling component includes a nickel concentrate impurity removal device 700, the input end of the nickel concentrate impurity removal device 700 is connected to the output end of the high concentration nickel solution delivery pump 505, the output end of the nickel concentrate impurity removal device 700 is connected to the input end of the impurity removal delivery pump 701, the output end of the impurity removal delivery pump 701 is connected to the input end of the extraction box 800, the output end of the extraction box 800 is connected to the input end of the extract delivery pump 801, the output end of the extract delivery pump 801 is connected to the input end of the crystallization box 900, the crystallization box 900 is connected to the air pressure pump 901, and the structure A nickel sulfate crystallization outlet 902 is provided at the lower end of the crystal box 900. The high-concentration nickel solution is transported to the nickel concentrate impurity removal equipment 700 through the high-concentration nickel solution delivery pump 505, and the high-concentration nickel solution is subjected to impurity removal treatment. The nickel concentrate after impurity removal is transported to the extraction box 800 through the impurity removal delivery pump 701, and sulfuric acid is added to extract the nickel concentrate. The extracted solution enters the crystallization box 900 through the extraction liquid delivery pump 801, is concentrated by evaporation, and the crystallization pot is pressurized with compressed air, cooled, and then centrifuged to obtain nickel sulfate crystals. The nickel sulfate crystals are taken out from the nickel sulfate crystallization outlet 902.

[0028] In one embodiment, Figure 1 As shown, control valves 300 are provided at the outlets of the pH debugging tank 100, the filter 200, the ion exchange tower 400, the reverse osmosis box 500, the chemical reaction equipment 600, the nickel concentrate impurity removal equipment 700, the extraction box 800 and the crystallization box 900. These control valves can open, close or partially adjust the flow of the fluid to ensure the smooth progress of the production process. In an emergency, the valves can quickly cut off the flow of the fluid to prevent equipment damage, leakage or the expansion of the accident.

[0029] The above embodiment discloses a nickel-based wastewater treatment device, in which nickel-containing wastewater is mixed and stirred to adjust the water quality, and the stirring impeller 101 is driven by the stirring motor 102 to stir, so that the pH value reaches and stabilizes within a specific range. The filter 200 filters the nickel-containing wastewater after the pH value is adjusted to remove impurities in the nickel-containing wastewater, and then the filtered nickel-containing wastewater is transported to the ion exchange tower 400 through the filter delivery pump 201. The filtered nickel-containing wastewater enters the ion exchange tower 400 and is exchanged through the ion resin 401. The exchanged water can be reused as reclaimed water. The exchanged nickel concentrate enters the reverse osmosis equipment 500, and most of the nickel ions are blocked in the high-concentration nickel solution storage chamber 502 by the semipermeable membrane 501. The low-concentration nickel solution after reverse osmosis is in the low-concentration nickel solution storage chamber 503. The low-concentration nickel solution passes through the low-concentration nickel solution. The delivery pump 504 delivers the nickel to the chemical reaction equipment 600. By adding the composite nano-liquid alkali to the low-concentration nickel solution entering the chemical reaction equipment 600, a small amount of nickel in the low-concentration nickel solution is reduced to produce nickel sludge. The small amount of nickel sludge greatly reduces the operating cost of wastewater treatment. The wastewater that meets the standards is discharged. The high-concentration nickel solution is delivered to the nickel concentrate impurity removal equipment 700 by the high-concentration nickel solution delivery pump 505, and the high-concentration nickel solution is subjected to impurity removal treatment. The nickel concentrate after impurity removal is delivered to the extraction box 800 by the impurity removal delivery pump 701, and sulfuric acid is added to extract the nickel concentrate. The obtained solution enters the crystallization system 900 through the extraction liquid delivery pump 801, and is concentrated by evaporation, the crystallization pot is pressurized by compressed air, cooled, and then centrifuged to obtain nickel sulfate crystals. The nickel sulfate crystals are taken out from the nickel sulfate crystallization outlet 902.

[0030] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A nickel-based wastewater treatment device, characterized in that: The invention comprises a pH debugging mechanism, a pre-filtration component, an ion exchange module, a reverse osmosis unit, a crystallization recycling component and a chemical reaction component. The pH debugging mechanism comprises a pH debugging pool (100). A stirring impeller (101) is suspended in the pH debugging pool (100). The stirring impeller (101) is fixedly connected to the output end of a stirring motor (102). The stirring motor (102) is fixed outside the pH debugging pool (100). The output end of the pH debugging pool (100) is connected to the input end of a pH debugging pool delivery pump (103).

2. A nickel-based wastewater treatment device according to claim 1, characterized in that: The pre-filtration component comprises a filter (200), the input end of the filter (200) is connected to the output end of the pH debugging tank delivery pump (103), the output end of the filter (200) is connected to the input end of the filter delivery pump (201), and the output end of the filter delivery pump (201) is connected to the ion exchange module.

3. A nickel-based wastewater treatment device according to claim 2, characterized in that: The ion exchange module comprises an ion exchange tower (400), wherein an ion resin (401) is provided in the ion exchange tower (400), an output end of the ion exchange tower (400) is connected to an input end of an ion exchange delivery pump (402), and an output end of the ion exchange delivery pump (402) is connected to a reverse osmosis unit.

4. A nickel-based wastewater treatment device according to claim 3, characterized in that: The reverse osmosis unit comprises a reverse osmosis box (500), wherein a semipermeable membrane (501) is provided in the reverse osmosis box (500), wherein the semipermeable membrane (501) divides the reverse osmosis box (500) into a high-concentration nickel solution storage chamber (502) and a low-concentration nickel solution storage chamber (503), wherein the output end of the high-concentration nickel solution storage chamber (502) is connected to the input end of a high-concentration nickel solution delivery pump (505), and the output end of the low-concentration nickel solution storage chamber (503) is connected to the input end of a low-concentration nickel solution delivery pump (504), and the output end of the low-concentration nickel solution delivery pump (504) is connected to a chemical reaction component.

5. A nickel-based wastewater treatment device according to claim 4, characterized in that: The chemical reaction component comprises a chemical reaction device (600), the input end of the chemical reaction device (600) is connected to the output end of a low-concentration nickel solution delivery pump (504), and the lower end of the chemical reaction device (600) is provided with a qualified water discharge port (601) and a small amount of sludge discharge port (602).

6. A nickel-based wastewater treatment device according to claim 5, characterized in that: The crystallization recycling component comprises a nickel concentrate impurity removal device (700), wherein the input end of the nickel concentrate impurity removal device (700) is connected to the output end of a high-concentration nickel solution delivery pump (505), the output end of the nickel concentrate impurity removal device (700) is connected to the input end of an impurity removal delivery pump (701), the output end of the impurity removal delivery pump (701) is connected to the input end of an extraction box (800), the output end of the extraction box (800) is connected to the input end of an extract delivery pump (801), the output end of the extract delivery pump (801) is connected to the input end of a crystallization box (900), the crystallization box (900) is connected to an air pressure pump (901), and the lower end of the crystallization box (900) is provided with a nickel sulfate crystallization outlet (902).

7. A nickel-based wastewater treatment device according to claim 6, characterized in that: Control valves (300) are connected to the outlets of the pH adjustment tank (100), the filter (200), the ion exchange tower (400), the reverse osmosis box (500), the chemical reaction equipment (600), the nickel concentrate impurity removal equipment (700), the extraction box (800) and the crystallization box (900).

Images