Membrane tube adsorption type cobalt salt solution combined oil removal equipment

Abstract

The utility model discloses membrane tube adsorption type cobalt salt solution combined oil removal equipment which comprises a combined oil removal tank, two combined grading plates are arranged in the combined oil removal tank, and the two combined grading plates divide an inner cavity of a tank body into a first separation tank, a second separation tank and a third separation tank which are communicated in sequence in the flowing direction of liquid; the upper part of the side wall of the first separation tank is connected with a liquid inlet pipe, a filter basket is placed in the first separation tank, and an oil removal fiber ball is arranged in the filter basket; a membrane tube mounting plate is arranged on one side, close to the first separation tank, in the second separation tank, and a plurality of membrane tube oil removers are connected to the membrane tube mounting plate; the upper part of the side wall of the third separation tank is connected with a liquid outlet pipe. According to the equipment, clarification oil removal and adsorption oil removal are combined, suspended oil, dispersed oil, emulsified oil and dissolved oil in an oil-containing solution are removed at a time, and the equipment investment cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of hydrometallurgical technology, specifically to a membrane tube adsorption type cobalt salt solution combined degreasing device. Background Technology

[0002] Currently, cobalt smelting in my country is mainly based on hydrometallurgical processes, primarily employing leaching and iron removal techniques to process cobalt raw materials. Organic extractants such as P204 and P507 are used to remove impurities and other metal ions from the leachate, producing a cobalt salt solution. Extraction involves the mixing and separation of organic and aqueous phases. In continuous industrial production, the presence of organic matter in the resulting cobalt salt solution is unavoidable; therefore, oil removal from the cobalt salt solution remains a major challenge in the industry.

[0003] The cobalt salt solution produced by extraction mainly contains four types of oil: suspended oil, dispersed oil, emulsified oil, and dissolved oil. Currently, the industry mainly uses air flotation / clarification to remove suspended oil, dispersed oil, and emulsified oil. For example, Chinese utility model patent CN201921059369.4 discloses an oil removal tank, which is divided into multiple separation tanks. The separated oil and impurities are confined in each separation tank, avoiding or reducing the amount of oil discharged with the liquid in the last separation tank, which is beneficial to the separation of oil and impurities in the liquid. For solution oil, adsorption is used to remove it. The adsorption method uses oil removal materials such as activated carbon, resin, and fiber balls. The equipment used is mostly large-volume resin columns and vertical tanks. The oil removal materials need to be filled in large quantities during use, and the replacement and regeneration processes consume a lot of manpower and resources. Utility Model Content

[0004] This utility model discloses a membrane tube adsorption type cobalt salt solution combined oil removal equipment, which combines clarification oil removal and adsorption oil removal to remove suspended oil, dispersed oil, emulsified oil and dissolved oil from oily solutions in one go, reducing equipment investment costs.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A membrane tube adsorption cobalt salt solution combined oil removal device includes a combined oil removal tank with two combined grading plates inside. The two combined grading plates divide the inner cavity of the tank into three sequentially connected separation tanks: a first separation tank, a second separation tank, and a third separation tank, along the liquid flow direction. An inlet pipe is connected to the upper part of the side wall of the first separation tank, and a filter basket containing oil removal fiber balls is placed inside the first separation tank. A membrane tube mounting plate is installed inside the second separation tank near the first separation tank, and multiple membrane tube oil separators are connected to the membrane tube mounting plate. An outlet pipe is connected to the upper part of the side wall of the third separation tank.

[0007] This utility model has the following beneficial effects:

[0008] This utility model provides a membrane tube adsorption-type cobalt salt solution combined oil removal equipment. Compared with the current industry-used combination equipment of large-volume resin columns, vertical tanks and box-type oil separators, this equipment significantly reduces the footprint by using a detachable integrated fiber ball filling box and an internally designed 0.5-micron precision membrane tube filled with highly efficient oil-removing substances. The oil-removing substances can be replaced in one go when saturated, greatly reducing manpower and material costs. The sealed oil separator box design provides the necessary pressure for the solution, ensuring solution flow and the oil removal effect of the equipment. The combined design of adsorption oil removal with air flotation and clarification oil removal processes allows most of the suspension, dispersed oil, and dissolved liquid in the solution before adsorption to be removed in advance, effectively extending the saturation period of the oil-removing substances in the membrane tube and ensuring the adsorption oil removal effect. This reduces the oil content of the cobalt salt solution from 15-20 ppm before oil removal to below 3 ppm, effectively guaranteeing the quality of the cobalt salt solution. Attached Figure Description

[0009] Figure 1 This is a front view of the structural cross-section of this utility model.

[0010] Figure 2 for Figure 1 Cross-sectional view of the AA structure.

[0011] In the diagram, 1-Combined oil removal tank, 2-First separation tank, 3-Second separation tank, 4-Third separation tank, 5-Filter basket, 6-Membrane tube mounting plate, 7-Membrane tube oil separator, 8-Inlet pipe, 9-Outlet pipe, 10-Drain pipe, 11-Main drain pipe, 12-Combined grading plate, 121-Upper separation plate, 122-Lower separation plate. Detailed Implementation

[0012] The present invention will be further explained below with reference to the accompanying drawings.

[0013] like Figure 1-2 As shown, a membrane tube adsorption type cobalt salt solution combined oil removal device includes a combined oil removal tank 1. The combined oil removal tank 1 is provided with two combined grading plates 12. The two combined grading plates 12 divide the inner cavity of the tank into three sequentially connected separation tanks: a first separation tank 2, a second separation tank 3, and a third separation tank 4 along the liquid flow direction. The upper part of the side wall of the first separation tank 2 is connected to an inlet pipe 8, and a filter basket 5 is placed inside the first separation tank 2. The filter basket 5 is filled with oil removal fiber balls. The second separation tank 3 is provided with a membrane tube mounting plate 6 on the side near the first separation tank 2. Multiple membrane tube oil removers 7 are connected to the membrane tube mounting plate 6. The upper part of the side wall of the third separation tank 4 is connected to an outlet pipe 9.

[0014] Each combined grading plate 12 includes an upper separation plate 121 and a lower separation plate 122 spaced apart. The upper end of the upper separation plate 121 is connected to the top plate of the tank, and the lower end of the upper separation plate 121 has a lower flow channel between it and the bottom plate of the tank. The lower end of the lower separation plate 122 is connected to the bottom plate of the tank, and the top surface of the lower separation plate 122 has an upper flow channel between it and the top plate of the tank. The upper separation plate 121 is located on the upstream side of the lower separation plate 122.

[0015] Corresponding to the first separation tank 2, the second separation tank 3 and the third separation tank 4, each separation tank has a row of oil pipes 10 connected to its side wall, and the corresponding oil pipes 10 are all located on the downstream side of the separation tank.

[0016] Corresponding to the first separation tank 2, the second separation tank 3, and the third separation tank 4, each separation tank has a manhole on its side or top.

[0017] In addition, each membrane tube oil separator 7 is connected to an oil drain branch pipe, which is connected to the main oil drain pipe 11 connected to the side wall of the second separation tank 3.

[0018] The working process of this utility model is as follows:

[0019] In operation, an oily solution is first injected into the combined oil removal tank 1 through the inlet pipe 8. After oil removal by the oil-removing fiber balls and oil discharge from the top of the first separation tank 2, the remaining solution, based on the principle of communicating vessels, enters the membrane tube oil separator 7 installed in the second separation tank 3 through the upper and lower flow channels constructed by the combined classifying plate 12 for secondary adsorption and oil removal. The membrane tube oil separator 7 uses a 0.5-micron membrane tube that can be filled with highly efficient oil-removing materials (oil-removing resin, activated carbon). Experiments have shown that when the internal filling material of the membrane tube oil separator is activated carbon, cobalt salt... After the solution is adsorbed and degreased by the membrane tube, the oil content of the solution can be reduced from 8-10 ppm to below 3 ppm. The membrane tube can be disassembled and backwashed as a whole, or the valve on the main oil drain pipe 11 can be opened to use the low-oil solution in the first separation tank 2 for rapid flushing, reducing the accumulation of impurities (insoluble particles, copper and zinc elements, etc.) and oil inside the membrane tube, and extending the service life of the membrane tube. After the oil-containing solution in the second separation tank 3 is adsorbed and drained by the membrane tube and drained from the top of the separation tank, it enters the third separation tank 4. After further clarification and oil removal in the third separation tank 4, it is discharged through the outlet pipe 9.

[0020] During the above-mentioned operation, the upper separation plate 121 and lower separation plate 122 in the combined grading plate 12 ensure that the organic phase in the previous separation tank does not enter the next separation tank, thus guaranteeing the oil removal effect. The design purpose of the third separation tank 4 is twofold: firstly, to prevent the high-oil solution from directly returning to subsequent processes when the membrane tube oil separator fails, reducing quality risks; secondly, to flexibly control the liquid level after oil removal. By adjusting the valve openings on the inlet pipe 8 and outlet pipe 9, a high liquid level in the combined oil removal tank 1 can be maintained at all times, ensuring stable oil removal and preventing the liquid transfer pump from running dry after oil removal. After the oil removal fiber balls and membrane tube oil separator are saturated, the corresponding manholes can be opened for replacement and maintenance.

[0021] In summary, this invention combines clarification and adsorption oil removal into one process. First, a detachable filter basket containing oil-removing fiber balls is used to force oil removal from the solution, reducing the oil content from 8-10 ppm to below 6 ppm. Finally, the solution undergoes deep oil removal via membrane adsorption to remove the remaining dissolved oil from the cobalt salt solution. The oil content of the liquid after oil removal is below 3 ppm, significantly reducing the investment in oil removal equipment and demonstrating good economic and social benefits.

Claims

1. A membrane-tube adsorption type cobalt salt solution combined oil removal device, characterized in that, The system includes a combined oil removal tank (1), which is equipped with two combined grading plates (12). The two combined grading plates (12) divide the inner cavity of the tank into three sequentially connected separation tanks: a first separation tank (2), a second separation tank (3), and a third separation tank (4) along the direction of liquid flow. The upper side wall of the first separation tank (2) is connected to an inlet pipe (8), and a filter basket (5) is placed inside the first separation tank (2). The filter basket (5) is filled with oil removal fiber balls. The second separation tank (3) is equipped with a membrane tube mounting plate (6) on the side near the first separation tank (2). Multiple membrane tube oil separators (7) are connected to the membrane tube mounting plate (6). The upper side wall of the third separation tank (4) is connected to an outlet pipe (9).

2. The membrane tube adsorption type cobalt salt solution combined oil removal device as described in claim 1, characterized in that, Corresponding to the first separation tank (2), the second separation tank (3) and the third separation tank (4), each separation tank has a row of oil pipes (10) connected to its side wall.

3. The membrane tube adsorption type cobalt salt solution combined oil removal device as described in claim 1, characterized in that, Each membrane tube oil separator (7) is connected to an oil drain branch pipe, which is connected to the main oil drain pipe (11) connected to the side wall of the second separation tank (3).

4. The membrane tube adsorption type cobalt salt solution combined oil removal device as described in claim 1, characterized in that, Corresponding to the first separation pool (2), the second separation pool (3) and the third separation pool (4), each separation pool is provided with a manhole on its side or top.

5. The membrane tube adsorption type cobalt salt solution combined oil removal device as described in claim 1, characterized in that, Both of the combined grading plates (12) include an upper separation plate (121) and a lower separation plate (122) spaced apart. The upper end of the upper separation plate (121) is connected to the top plate of the tank, and the lower end of the upper separation plate (121) has a lower flow channel between it and the bottom plate of the tank. The lower end of the lower separation plate (122) is connected to the bottom plate of the tank, and the top surface of the lower separation plate (122) has an upper flow channel between it and the top plate of the tank. The upper separation plate (121) is located on the upstream side of the lower separation plate (122).

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