A combined degreasing system for the nickel-cobalt electrowinning industry

Abstract

This utility model discloses a combined oil removal system for the electrolytic nickel-cobalt industry, comprising a pretreatment unit, an ultrasonic oil removal unit, an oil removal tank, an activated carbon oil removal unit, a resin oil removal unit, and a control system. The pretreatment unit includes a sedimentation tank and a filter; the ultrasonic oil removal unit includes an ultrasonic generator and a transducer; the activated carbon oil removal unit includes an activated carbon adsorption tower and a first circulating pump; the resin oil removal unit includes a resin adsorption tower and a second circulating pump; the sedimentation tank is connected to an oily electrolyte delivery pipeline; the sedimentation tank outlet is connected to the filter inlet; the filter outlet is connected to the ultrasonic oil removal unit inlet; the ultrasonic oil removal unit outlet is connected to the oil removal tank; the oil removal tank is connected to the activated carbon adsorption tower via the first circulating pump; and the activated carbon adsorption tower outlet is connected to the resin adsorption tower inlet via the second circulating pump. This utility model has significant advantages in oil removal efficiency, operating cost, and ease of operation, and is suitable for the high-efficiency oil removal needs of the electrolytic nickel-cobalt industry.

Description

Technical Field

[0001] This utility model belongs to the field of metallurgical technology and relates to a combined degreasing system for the electrowinning nickel-cobalt industry. Specifically, it relates to the degreasing and purification of the extraction liquid. The degreasing system reduces the oil content of the solution to meet the production needs of the electrowinning system. Background Technology

[0002] In the electrolytic nickel-cobalt production process, the presence of oil in the electrolyte can severely impact product quality and production efficiency. Traditional degreasing methods typically employ a single technology, such as ultrasonic degreasing, activated carbon degreasing, or resin degreasing, which has the following shortcomings:

[0003] 1. Low oil removal efficiency: Single oil removal technology is difficult to completely remove oil from electrolyte, especially emulsified oil and dissolved oil;

[0004] 2. High operating costs: Activated carbon and resin need to be replaced regularly, increasing operating costs.

[0005] 3. Complex operation: Different degreasing technologies require different equipment and operating conditions, which increases the difficulty of operation. Utility Model Content

[0006] To address the aforementioned problems, this invention provides a combined degreasing system for the electrowinning nickel-cobalt industry, which solves the problems of low degreasing efficiency, high operating costs, and complex operation in the prior art.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0008] A combined degreasing system for the nickel-cobalt electrowinning industry includes a pretreatment unit, an ultrasonic degreasing unit, an degreasing tank, an activated carbon degreasing unit, a resin degreasing unit, and a control system. The pretreatment unit includes a sedimentation tank and a filter. The ultrasonic degreasing unit includes an ultrasonic generator and a transducer. The activated carbon degreasing unit includes an activated carbon adsorption tower and a first circulating pump. The resin degreasing unit includes a resin adsorption tower and a second circulating pump. The inlet of the sedimentation tank is connected to an oily electrolyte delivery pipeline, and the outlet of the sedimentation tank is connected to the inlet of the filter. The outlet of the filter is connected to the inlet of the ultrasonic degreasing unit, and the outlet of the ultrasonic degreasing unit is connected to the inlet of the degreasing tank. The outlet of the degreasing tank is connected to the inlet of the activated carbon adsorption tower via the first circulating pump, and the outlet of the activated carbon adsorption tower is connected to the inlet of the resin adsorption tower via the second circulating pump. The outlet of the resin adsorption tower is connected to a storage tank for the degreased electrolyte. The control system is used to control the operating parameters of each unit.

[0009] The pretreatment unit is used to remove suspended solids and particulate matter from the electrolyte; the ultrasonic degreasing unit is used to disperse oil through ultrasonic emulsification; the activated carbon degreasing unit is used to adsorb oil from the electrolyte; and the resin degreasing unit is used to further adsorb oil from the electrolyte.

[0010] In a further technical solution, the number of the first circulation pump and the second circulation pump are two, and they are arranged side by side.

[0011] In a further technical solution, both the top of the activated carbon adsorption tower and the top of the resin adsorption tower are respectively provided with a compressed air inlet and a pure water inlet, the compressed air inlet and the compressed air delivery pipeline are connected; the pure water inlet and the pure water delivery pipeline are connected.

[0012] In a further technical solution, the top of the resin adsorption tower is also provided with a liquid alkali inlet and a sulfuric acid inlet, which are respectively connected to a liquid alkali conveying pipeline and a sulfuric acid conveying pipeline.

[0013] In a further technical solution, both the activated carbon adsorption tower and the resin adsorption tower are provided with waste liquid outlets at the bottom, and the waste liquid outlets are connected to waste liquid conveying pipelines.

[0014] In a further technical solution, the filter has a multi-layer filter element structure with a filtration accuracy of 1-10μm; the resin adsorption tower is filled with hydrophobic macroporous adsorption resin.

[0015] The technical solution of this utility model has the following beneficial effects:

[0016] (1) Improved oil removal efficiency: This utility model adopts a combination of ultrasonic oil removal, activated carbon oil removal and resin oil removal processes, which can completely remove oil from the electrolyte, including emulsified oil and dissolved oil.

[0017] (2) Reduced operating costs: The replacement cycle of activated carbon and resin is extended, which reduces operating costs.

[0018] (3) Simplified operation: This utility model adopts an integrated design, which makes operation simple and convenient.

[0019] (4) Improve product quality: The reduced oil content in the electrolyte improves the quality of electrolytic nickel-cobalt products. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the combined degreasing system of this utility model for the electrowinning nickel-cobalt industry;

[0021] Figure 2 This is a process flow diagram of the combined degreasing system of this utility model used in the electrowinning nickel-cobalt industry;

[0022] In the diagram: 1. Sedimentation tank; 2. Filter; 3. Ultrasonic generator; 4. Transducer; 5. Oil removal tank; 6. Activated carbon adsorption tower; 7. First circulation pump; 8. Resin adsorption tower; 9. Second circulation pump. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0024] like Figure 1 and Figure 2 As shown, a combined degreasing system for the nickel-cobalt electrowinning industry includes a pretreatment unit, an ultrasonic degreasing unit, a degreasing tank 5, an activated carbon degreasing unit, a resin degreasing unit, and a control system. The pretreatment unit includes a sedimentation tank 1 and a filter 2. The ultrasonic degreasing unit includes an ultrasonic generator 3 and a transducer 4. The activated carbon degreasing unit includes an activated carbon adsorption tower 6 and a first circulation pump 7. The resin degreasing unit includes a resin adsorption tower 8 and a second circulation pump 9. The inlet of the sedimentation tank 1 is connected to an oily electrolyte conveying pipeline, and the outlet of the sedimentation tank 1 is connected to the inlet of the filter 2. The outlet of the filter 2 is connected to the inlet of the ultrasonic degreasing unit, and the outlet of the ultrasonic degreasing unit is connected to the inlet of the degreasing tank 5. The outlet of the degreasing tank 5 is connected to the inlet of the activated carbon adsorption tower 6 through the first circulation pump 7. The outlet of the activated carbon adsorption tower 6 is connected to the inlet of the resin adsorption tower 8 through the second circulation pump 9. The outlet of the resin adsorption tower 8 is connected to a degreased electrolyte storage tank.

[0025] The control system is used to control the operating parameters of each unit, including ultrasonic power, flow rate and pressure of activated carbon adsorption tower 6 and resin adsorption tower 8.

[0026] The pretreatment unit removes suspended solids and particulate matter from the electrolyte. The ultrasonic oil removal unit emulsifies and disperses oil using ultrasound. An ultrasonic generator 3 converts electrical energy into ultrasonic energy via a transducer 4, which is applied to the electrolyte in the oil removal tank 5 to emulsify and disperse the oil. The ultrasonic frequency of the ultrasonic oil removal unit is 20-40kHz, and the power is adjustable from 0.5-5kW. A first circulation pump 7 pumps the electrolyte from the oil removal tank 5 into an activated carbon adsorption tower 6, where the activated carbon adsorbs the oil from the electrolyte. A second circulation pump 9 pumps the electrolyte from the activated carbon adsorption tower 6 into a resin adsorption tower 8, where the resin further adsorbs the oil from the electrolyte.

[0027] Both the activated carbon adsorption tower 6 and the resin adsorption tower 8 are equipped with pressure sensors and flow meters, and are linked to the control system.

[0028] There are two of each of the first circulation pump 7 and the second circulation pump 9, which are arranged side by side.

[0029] Both the top of the activated carbon adsorption tower 6 and the top of the resin adsorption tower 8 are equipped with a compressed air inlet and a pure water inlet, respectively. The compressed air inlet is connected to a compressed air delivery pipeline; the pure water inlet is connected to a pure water delivery pipeline. The compressed air inlet and the pure water inlet are provided for backwashing after a period of use.

[0030] At the top of the resin adsorption tower 8, there are also liquid alkali inlets and sulfuric acid inlets, which are connected to liquid alkali delivery pipelines and sulfuric acid delivery pipelines, respectively. The liquid alkali inlets and sulfuric acid inlets are provided to enable resin regeneration.

[0031] Both the activated carbon adsorption tower 6 and the resin adsorption tower 8 are equipped with waste liquid outlets at their bottoms, which are connected to waste liquid conveying pipelines to realize waste liquid conveying.

[0032] The working principle of this utility model is as follows: A combined degreasing system for the electrowinning nickel-cobalt industry is as follows:

[0033] The oil-containing electrolyte first enters the pretreatment unit to remove suspended solids and particulate matter. Then it enters the ultrasonic degreasing unit, where the oil is emulsified and dispersed under ultrasonic waves. Next, it enters the activated carbon degreasing unit, where the activated carbon adsorbs the oil from the electrolyte. Finally, it enters the resin degreasing unit, where the resin adsorbs the oil from the electrolyte. After this combined degreasing treatment, the oil content in the electrolyte is significantly reduced, meeting the requirements for electrowinning nickel-cobalt production.

[0034] The specific oil removal technology performance data for this embodiment are as follows:

[0035] 1. Oil removal efficiency: Oil removal rate ≥99.5% (actual data), oil content in the solution after oil removal ≤1ppm;

[0036] 2. Operating costs: The replacement cycle for activated carbon and resin is extended by 50%;

[0037] 3. Energy consumption: Overall energy consumption is reduced by 30% (compared to traditional single oil removal technology).

[0038] The relevant process parameters and testing methods are as follows:

[0039] 1. Process parameters:

[0040] Ultrasonic treatment time: 10-30 minutes;

[0041] Empty column flow rate of activated carbon adsorption tower: 2-5 m / h;

[0042] Resin adsorption tower operating temperature: 25-40℃;

[0043] 2. Detection method:

[0044] Oil content was determined using infrared spectroscopy (IR).

[0045] Oil composition was analyzed using gas chromatography-mass spectrometry (GC-MS);

[0046] Through the above design, this utility model has significant advantages in terms of degreasing efficiency, operating cost and ease of operation, and is suitable for the high-efficiency degreasing needs of the electrowinning nickel-cobalt industry.

[0047] It should be noted that other undetailed aspects of the combined degreasing system for the electrowinning nickel-cobalt industry described in this utility model are all existing conventional technologies and will not be elaborated here.

[0048] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A combined degreasing system for the electrowinning nickel-cobalt industry, characterized in that, The system includes a pretreatment unit, an ultrasonic oil removal unit, an oil removal tank (5), an activated carbon oil removal unit, a resin oil removal unit, and a control system. The pretreatment unit includes a sedimentation tank (1) and a filter (2). The ultrasonic oil removal unit includes an ultrasonic generator (3) and a transducer (4). The activated carbon oil removal unit includes an activated carbon adsorption tower (6) and a first circulation pump (7). The resin oil removal unit includes a resin adsorption tower (8) and a second circulation pump (9). The inlet of the sedimentation tank (1) is connected to the oil-containing electrolyte conveying pipeline. The outlet of the sedimentation tank (1) is connected to the inlet of the filter (2). The outlet of the filter (2) is connected to the inlet of the ultrasonic oil removal unit. The outlet of the ultrasonic oil removal unit is connected to the inlet of the oil removal tank (5). The outlet of the oil removal tank (5) is connected to the inlet of the activated carbon adsorption tower (6) through the first circulation pump (7). The outlet of the activated carbon adsorption tower (6) is connected to the inlet of the resin adsorption tower (8) through the second circulation pump (9). The outlet of the resin adsorption tower (8) is connected to the oil-removed electrolyte storage tank.

2. The combined degreasing system for the electrowinning nickel-cobalt industry according to claim 1, characterized in that, The number of the first circulation pump (7) and the second circulation pump (9) are two, respectively, and they are arranged side by side.

3. The combined degreasing system for the electrowinning nickel-cobalt industry according to claim 1, characterized in that, The top of the activated carbon adsorption tower (6) and the top of the resin adsorption tower (8) are respectively provided with a compressed air inlet and a pure water inlet, and the compressed air inlet is connected to the compressed air delivery pipeline; the pure water inlet is connected to the pure water delivery pipeline.

4. A combined degreasing system for the electrowinning nickel-cobalt industry according to claim 1, characterized in that, The top of the resin adsorption tower (8) is also provided with a liquid alkali inlet and a sulfuric acid inlet, which are respectively connected to the liquid alkali conveying pipeline and the sulfuric acid conveying pipeline.

5. A combined degreasing system for the electrowinning nickel-cobalt industry according to claim 1, characterized in that, Both the activated carbon adsorption tower (6) and the resin adsorption tower (8) are equipped with waste liquid outlets at the bottom, which are connected to waste liquid conveying pipelines.

6. A combined degreasing system for the electrowinning nickel-cobalt industry according to claim 1, characterized in that, The control system is used to control the operating parameters of each unit.

7. A combined degreasing system for the electrowinning nickel-cobalt industry according to claim 1, characterized in that, The filter (2) has a multi-layer filter element structure and a filtration accuracy of 1-10μm; the resin adsorption tower (8) is filled with hydrophobic macroporous adsorption resin.

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