Oil removal device for nickel sulfate solution

Abstract

The utility model relates to the field of hydrometallurgy, in particular to a nickel sulfate solution deoiling device. Comprising a standing tank connected with a production process outlet end, one end of an oil removal device is connected with the standing tank, the other end of the oil removal device is connected with a resin adsorption column, the resin adsorption column is connected with a regeneration tank, and the regeneration tank is connected with a solution storage tank. According to the oil removal device arranged in the device, oil can be treated step by step according to different existing forms and physical properties of oil in nickel sulfate through internal fiber cotton filtration, resin adsorption and filter screen filtration, and compared with the prior art, the oil removal effect is better; the device is provided with the oil-water separator and the bag filter, so that the oil removal effect can be further improved, and impurities in the nickel sulfate solution can be separated.

Description

Technical Field

[0001] The utility model relates to the field of hydrometallurgy, in particular to a nickel sulfate solution degreasing device. Background Art

[0002] Nickel sulfate is an inorganic substance that is soluble in water and slightly soluble in ethanol and methanol. Its aqueous solution is acidic and slightly soluble in acid and ammonia. It is mainly used in the electroplating industry. It is the main nickel salt for electroplating nickel and chemical nickel plating. It is also the source of metal nickel ions and can dissociate nickel ions and sulfate ions during the electroplating process. In the non-ferrous hydrometallurgical industry, when high-quality nickel sulfate is produced by extraction, a large amount of emulsified oil will be entrained in the nickel sulfate solution.

[0003] Existing oil removal devices, such as the patent application with application number 202020482605X and titled "A nickel sulfate solution oil removal device", discloses that it includes a separation tank and a frame, the separation tank is fixedly mounted on the upper part of the frame, a reduction motor is fixedly mounted on the upper part of the separation tank, and a stirring paddle is installed on the output shaft of the reduction motor through a coupling transmission...; for example, the patent application with application number 2014200892432 and titled "Oil Removal System for Nickel Sulfate Solution" discloses that it includes a filter, a demulsification enrichment tank, an oil-water separator, and an oil collecting tank, wherein the oil-water separator is provided with an oil storage area, a liquid distributor, and a liquid collector, and the filter is connected to the liquid inlet of the demulsification enrichment tank through a pipe 1...; the oil removal effect of the nickel sulfate solution in the above-mentioned patent cannot meet the needs of the existing process. Utility Model Content

[0004] The utility model aims to provide a nickel sulfate solution degreasing device with good degreasing effect, so as to solve the problems in the background technology.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] The utility model discloses a nickel sulfate solution deoiling device, comprising a static tank connected to the outlet end of a production process, wherein one end of the deoiling device is connected to the static tank, and the other end is connected to a resin adsorption column, the resin adsorption column is connected to a regeneration tank, and the regeneration tank is connected to a solution storage tank.

[0007] Preferably, the oil removal device includes a tank body and a liquid inlet arranged on the top of the tank body, the liquid inlet is connected to the static tank through a pipeline, and a liquid outlet valve is provided at the bottom of the tank body, wherein the liquid outlet valve is connected to the resin adsorption column; at least one layer of filter screen, at least one layer of first orifice plate and second orifice plate are provided in the tank body from top to bottom, activated carbon is provided on the first orifice plate, and fiber cotton is provided on the second orifice plate.

[0008] Preferably, the resin adsorption column comprises a tank body and a screen arranged in the tank body, and a resin for absorbing oil is arranged at the bottom of the screen.

[0009] Preferably, it also includes an oil-water separator disposed between the resin adsorption column and the regeneration tank.

[0010] Preferably, the regeneration tank comprises a tank body containing a desorbent.

[0011] Preferably, the desorbent is one or more of an acid solution, an alkaline solution, a salt solution, an organic solvent, hot water, and hot steam.

[0012] Preferably, it also includes a bag filter arranged between the regeneration tank and the solution storage tank.

[0013] Preferably, an adsorber is provided on the static tank.

[0014] Preferably, a plurality of pumps and valves are provided in the pipelines connecting the static tank, the oil removal device, the resin adsorption column, the regeneration tank, the solution storage tank, the oil-water separator and the bag filter.

[0015] Compared with the prior art, the utility model has achieved the following technical effects:

[0016] The oil removal device provided in the device can process the oil in the nickel sulfate solution step by step according to the existence form and physical properties of the oil through internal fiber cotton filtration, resin adsorption and filter filtration, and has a better oil removal effect than the prior art; the device is provided with an oil-water separator and a bag filter, which can further improve the oil removal effect and realize the separation of impurities in the nickel sulfate solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the oil removal device of the utility model;

[0019] Figure 3 It is a schematic diagram of the resin adsorption column of the utility model.

[0020] Figure numerals: 1. static tank; 2. oil removal device; 3. resin adsorption column; 4. regeneration tank; 5. solution storage tank; 6. bag filter; 7. oil-water separator; 8. filter screen; 9. first orifice plate; 10. second orifice plate; 11. screen. DETAILED DESCRIPTION

[0021] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0022] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] In the description of this embodiment, the terms "upper", "lower", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0024] like Figure 1 As shown, it includes a static tank 1 connected to the outlet end of the production process, wherein one end of the oil removal device 2 is connected to the static tank 1, and the other end is connected to the resin adsorption column 3, the resin adsorption column 3 is connected to the regeneration tank 4, and the regeneration tank 4 is connected to the solution storage tank 5.

[0025] In the embodiment, the nickel sulfate solution is allowed to stand in the static tank 1 for 2 to 3 hours. The static tank 1 is provided with an adsorber that can absorb the oil floating on the surface of the solution. In the embodiment, the adsorber includes a straw, one end of which is inserted into the static tank 1. The adsorber in the embodiment is a common existing technology, so the structure is not elaborated here.

[0026] like Figure 2 As shown, the degreasing device 2 comprises a tank body and a liquid inlet disposed on the top of the tank body, the liquid inlet is connected to the static tank 1 through a pipeline, a liquid outlet valve is disposed at the bottom of the tank body, wherein the liquid outlet valve is connected to the resin adsorption column 3; at least one layer of filter screen 8, at least one layer of first orifice plate 9 and second orifice plate 10 are disposed from top to bottom in the tank body, the first orifice plate 9 is provided with activated carbon, and the second orifice plate 10 is provided with fiber cotton. In the embodiment, the degreasing device 2 is provided with three layers of filtration for filtering the solution, Figure 2 As shown, in the embodiment, the filter screen 8, the first orifice plate 9 and the second orifice plate 10 are reinforced by a connecting plate (not shown in the figure) arranged in the tank body through a reinforcing bolt. When the solution enters through the liquid inlet, it passes through the filter screen 8 to filter out impurities, then passes through the activated carbon, and continues to be filtered by adsorption using the activated carbon, and finally passes through the fiber cotton to filter for the third time using the fiber, and the solution is purified by adsorbing the suspended matter and particles entrained in the solution.

[0027] In the embodiment, the solution is further deoiled by a resin adsorption column 3, such as Figure 3 The structure of the resin adsorption column 3 of the device is shown. The resin adsorption column 3 includes a tank body and a screen 11 arranged in the tank body. The upper and lower ends of the tank body are fixedly connected by flanges, wherein the screen 11 is arranged in an arched structure. The screen 11 can further remove suspended matter and impurities in the nickel sulfate solution. An opening is provided at one end of the screen 11, and the filtrate on the screen can be removed by the opening to prevent the filter from being blocked; an oil absorption area is provided at the bottom of the tube body, and an opening is also provided at one end of the top of the oil absorption area, through which resin can be replenished, and an oil-absorbing resin is provided in the oil absorption area. The resin used for the resin adsorption column in the embodiment is a resin produced by Xi'an Lanshen New Materials Technology Co., Ltd., which can reduce the oil content in the nickel sulfate solution from 100 ppm to below 2 ppm, and the removal efficiency is greater than 98%.

[0028] It also includes an oil-water separator 7 disposed between the resin adsorption column 3 and the regeneration tank 4. In the embodiment, after the solution is deoiled, it enters the oil-water separator 7, and the residual oil in the solution can be separated to achieve oil-water separation. A small amount of floating oil on the upper part of the oil-water separator 7 is disposed as hazardous waste, and the lower water phase is pumped into the regeneration tank 4 to be regenerated by a desorbent. The regeneration tank 4 includes a tank body containing a desorbent. The desorbent is one or more of an acid solution, an alkaline solution, a salt solution, an organic solvent, hot water, and hot steam.

[0029] The invention also includes a bag filter 6 disposed between the regeneration tank 4 and the solution storage tank 5. The bag filter 6 is provided to prevent the damaged or leaked resin from entering the solution storage tank 5 along with the solution during the operation of the resin adsorption column 3, thereby affecting the quality of the solution.

[0030] It should be noted that the pipelines connecting the various devices in this device are equipped with valves and pumps for transporting the solution.

[0031] When the device is used, the oil-containing nickel sulfate solution of the production process enters the static tank 1 and is allowed to stand for 2 to 3 hours to obtain a nickel sulfate solution in a stable state and oil floating on the surface, and the adsorber is used to absorb and separate the oil, and the valve between the static tank 1 and the oil removal device 2 is opened to pump the nickel sulfate solution into the oil removal device 2, and the impurities, suspended matter, particles, etc. in the nickel sulfate solution are removed through the three-layer filtration arranged from top to bottom in the oil removal device 2; after removal, the bottom liquid outlet valve of the oil removal device 2 is opened, and the nickel sulfate solution is pumped into the resin adsorption column 3 to further adsorb organic matter and impurities in the nickel sulfate solution. After the adsorption is completed, the residual oil in the solution can be separated by entering the oil-water separator 7 to achieve oil-water separation, and the lower water phase of the oil-water separator 7 is pumped into the regeneration tank 4 to be regenerated by the desorbent, and the regenerated solution is filtered through the bag filter 6 and enters the solution storage tank 5 to prevent the damaged or leaked resin from entering the solution storage tank 5 with the solution, and the solution storage tank 5 finally obtains a nickel sulfate solution that meets industrial requirements.

Claims

1. A nickel sulfate solution degreasing device, characterized in that: It comprises a static tank (1) connected to the outlet end of the production process, wherein one end of an oil removal device (2) is connected to the static tank (1), and the other end is connected to a resin adsorption column (3), the resin adsorption column (3) is connected to a regeneration tank (4), and the regeneration tank (4) is connected to a solution storage tank (5).

2. A nickel sulfate solution degreasing device according to claim 1, characterized in that: The oil removal device (2) comprises a tank body and a liquid inlet provided on the top of the tank body, the liquid inlet is connected to the static tank (1) through a pipeline, and a liquid outlet valve is provided at the bottom of the tank body, wherein the liquid outlet valve is connected to the resin adsorption column (3); At least one layer of filter screen (8), at least one layer of first orifice plate (9) and a second orifice plate (10) are arranged in the tank body from top to bottom, the first orifice plate (9) is provided with activated carbon, and the second orifice plate (10) is provided with fiber cotton.

3. A nickel sulfate solution degreasing device according to claim 1, characterized in that: The resin adsorption column (3) comprises a tank body and a screen (11) arranged in the tank body, and a resin for absorbing oil is arranged at the bottom of the screen (11).

4. A nickel sulfate solution degreasing device according to claim 3, characterized in that: It also includes an oil-water separator (7) disposed between the resin adsorption column (3) and the regeneration tank (4).

5. A nickel sulfate solution degreasing device according to claim 1, characterized in that: The regeneration tank (4) comprises a tank body containing a desorbent.

6. A nickel sulfate solution degreasing device according to claim 1, characterized in that: It also includes a bag filter (6) arranged between the regeneration tank (4) and the solution storage tank (5).

7. A nickel sulfate solution degreasing device according to claim 1, characterized in that: The static tank (1) is provided with an adsorber.

8. A nickel sulfate solution degreasing device according to claim 1, characterized in that: A plurality of pumps and valves are provided in the pipelines connecting the static tank (1), the oil removal device (2), the resin adsorption column (3), the regeneration tank (4), the solution storage tank (5), the oil-water separator (7) and the bag filter (6).

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