Nickel sulfate solution oil removal system

Abstract

The utility model discloses an oil removal system for nickel sulfate liquid. The oil removal system comprises a filtering structure and a plurality of oil removal tanks, the multiple oil removal tanks are sequentially communicated, and a solution in the oil removal tank at one end can flow into the oil removal tank at the other end; the filtering structure is communicated with the oil removal tank located at the tail end of the solution flowing direction and used for intercepting oil absorption materials in fluid output by the oil removal tank at the tail end of the solution flowing direction. According to the scheme, the adsorption material and the nickel sulfate solution to be subjected to oil removal can be continuously added into the liquid inlet tank, and when the adsorption material and the nickel sulfate solution sequentially flow among the multiple oil removal tanks, the adsorption material can be in full contact with oil, the oil absorption effect is guaranteed, oil can be continuously removed, and the oil removal efficiency of the nickel sulfate solution is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of nickel sulfate solution oil removal, specifically relates to a kind of nickel sulfate solution oil removal system. BACKGROUND

[0002] Nickel sulfate solution oil removal process is divided into chemical oil removal and physical oil removal.Chemical oil removal mainly has ozone oil removal, photocatalytic oxidation method, membrane biological reactor and so on;Physical oil removal mainly has stratified oil removal, adsorption oil removal and interception oil removal process.

[0003] Publication No. CN211947173U discloses a kind of nickel sulfate solution oil removal device, in specific use, the oil in separation tank and the mixed liquid of nickel sulfate are fully stirred, then stand for a certain time, oily substance is suspended in solution above due to its low density, nickel sulfate solution and oily liquid are sequentially excluded through multiple liquid outlet pipes at bottom, the solution stratification position in tank can be observed through observation window.

[0004] However, the patent needs to be stirred by stirring blade first Oil and nickel sulfate mixed liquid is stirred for a certain time, then stratified after standing for a certain time, then stratified by multiple liquid outlet pipes, the time required for oil removal is long, and the oil removal efficiency needs to be improved. UTILITY MODEL CONTENT

[0005] The utility model aims at overcoming the above technical deficiencies, and proposes a kind of nickel sulfate solution oil removal system, to solve the technical problems that the prior art needs to be stirred by stirring blade first Oil and nickel sulfate mixed liquid is stirred for a certain time, then stratified after standing for a certain time, then stratified by multiple liquid outlet pipes, the time required for oil removal is long, and the oil removal efficiency needs to be improved.

[0006] To achieve the above technical purpose, the utility model takes the following technical scheme:

[0007] The utility model provides a kind of nickel sulfate solution oil removal system, comprising:

[0008] Multiple oil removal tanks, multiple the oil removal tank is sequentially communicated, and the solution in the oil removal tank of one end can flow into the oil removal tank of another end;And

[0009] Filter structure, communication is located in the oil removal tank of solution flow direction end, for intercepting the oil-absorbing material in the fluid output by the oil removal tank of solution flow direction end.

[0010] In some embodiments, the height of multiple the oil removal tank is sequentially reduced and arranged, and flow guide structure is arranged between adjacent two the oil removal tanks, and the flow guide structure communicates adjacent two the oil removal tanks.

[0011] In some embodiments, the flow guide structure comprises a flow guide pipe and a flow guide valve, two ends of the flow guide pipe are respectively connected to two adjacent oil removal tanks, and the flow guide valve is arranged in the flow guide pipe.

[0012] In some embodiments, the oil removal tanks near the front end of the solution flow direction are respectively provided with access pipes for accessing oil-absorbing materials and oil-removing solutions.

[0013] In some embodiments, the oil removal tanks near the end of the solution flow direction are respectively provided with delivery pipes connected to the filter structure.

[0014] In some embodiments, the filter structure comprises an output pipe, a filter press, and a filter press pump, the output pipe is connected to the filter press and the oil removal tank at the end of the solution flow direction, and the filter press pump is arranged in the output pipe.

[0015] In some embodiments, the filter structure further comprises a pH meter, and the pH meter is arranged in the output pipe.

[0016] In some embodiments, the oil removal system for nickel sulfate solution further comprises a heat exchanger, a liquid storage tank, and a liquid inlet pipe, the heat exchanger has a high-temperature flow channel and a heat exchange flow channel, the high-temperature flow channel is used for accessing high-temperature fluid and is connected to the liquid storage tank, and the liquid inlet pipe is connected to the heat exchange flow channel and the oil removal tank at the front end of the solution flow direction for transporting oil-removing solutions.

[0017] In some embodiments, the liquid inlet pipe and the heat exchanger are respectively provided with a plurality of pipes, the plurality of liquid inlet pipes and the plurality of heat exchangers are one-to-one corresponding, each liquid inlet pipe is connected to the heat exchange flow channel of the corresponding heat exchanger, and the plurality of liquid inlet pipes are all connected to the oil removal tank at the front end of the solution flow direction.

[0018] In some embodiments, the oil removal system for nickel sulfate solution further comprises a solution tank for containing oil-removing solutions and a plurality of liquid inlet pumps, and the plurality of liquid inlet pipes are respectively connected to the plurality of liquid inlet pumps.

[0019] Compared with the prior art, the oil removal system for the nickel sulfate solution provided by the utility model, for the convenience of description, defines the oil removal groove at the head end of the solution flow direction as the liquid inlet groove, and defines the oil removal groove at the tail end of the solution flow direction as the liquid outlet groove. In the specific work, the oil absorption material and the nickel sulfate solution to be deoiled are simultaneously added into the liquid inlet groove, and the mixture of the oil absorption material and the nickel sulfate solution sequentially flows through the multiple oil removal grooves towards the liquid outlet groove. In this process, the oil absorption material flows with the nickel sulfate solution and continuously moves up and down under the action of the water potential of the nickel sulfate solution, can fully contact with the oil in the nickel sulfate solution, and has sufficient oil absorption reaction time. Finally, after being discharged from the liquid outlet groove and entering the filtering structure, the oil-absorbed oil absorption material is intercepted by the filtering structure, and the deoiled nickel sulfate solution passes through the filtering structure, realizing the oil removal of the nickel sulfate solution.

[0020] Therefore, in the scheme, the adsorption material and the nickel sulfate solution to be deoiled can be continuously added into the liquid inlet groove, and the adsorption material and the nickel sulfate solution sequentially flow between the multiple oil removal grooves, so that the adsorption material can fully contact with the oil, the oil absorption effect is guaranteed, the oil can be continuously removed, and the oil removal efficiency of the nickel sulfate solution is improved. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a flow schematic diagram of the oil removal system for the nickel sulfate solution provided by the utility model embodiment;

[0022] Figure 2 is Figure 1 is a schematic diagram of the filtering structure and the multiple oil removal grooves in the oil removal system for the nickel sulfate solution;

[0023] Figure 3 is Figure 1 is a schematic diagram of part of the oil removal grooves in the oil removal system for the nickel sulfate solution;

[0024] Figure 4 is Figure 1 is a schematic diagram of the liquid inlet pipe and the heat exchanger in the oil removal system for the nickel sulfate solution.

[0025] BRIEF DESCRIPTION OF DRAWINGS

[0026] 1, oil removal groove; 11, liquid inlet groove; 12, liquid outlet groove; 13, transition groove; 14, access pipeline; 15, delivery pipeline; 2, filtering structure; 21, output pipe; 22, filter press; 23, filter press pump; 24, acid-base meter; 3, flow guide structure; 31, flow guide pipe; 32, flow guide valve; 4, heat exchanger; 5, liquid storage tank; 51, water outlet pipe; 52, condensate pump; 6, liquid inlet pipe; 61, liquid inlet pump; 62, thermometer; 7, solution tank; 8, steam pipe; 9, material pipe. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and advantages of the utility model clearer and more apparent, the utility model will be further described in detail below in combination with the drawings and examples.

[0028] In order to solve the technical problem that the oil needs to be removed for a long time and the oil removal efficiency needs to be improved by stirring the mixed solution of oil and nickel sulfate with stirring blades for a certain time, then stratifying after standing for a certain time, and then discharging the stratified liquid through multiple liquid outlet pipes, the utility model provides a nickel sulfate solution oil removal system, when the adsorbed material and the nickel sulfate solution flow between multiple oil removal tanks in turn, the adsorbed material and the oil can be fully contacted, the oil absorption effect is ensured, the oil can be continuously removed, and the nickel sulfate solution oil removal efficiency is improved.

[0029] Please refer to Figure 1 and Figure 2 , Figure 1 and Figure 2 are structural schematic diagrams of the nickel sulfate solution oil removal system in an embodiment of the utility model, the nickel sulfate solution oil removal system comprises a filter structure 2 and multiple oil removal tanks 1; the multiple oil removal tanks 1 are communicated in turn, and the solution in the oil removal tank 1 at one end can flow into the oil removal tank 1 at the other end; the filter structure 2 is communicated with the oil removal tank 1 at the end of the solution flow direction and is used for intercepting the adsorbed material in the fluid output by the oil removal tank 1 at the end of the solution flow direction.

[0030] In the nickel sulfate solution oil removal system provided by the utility model, for the convenience of description, the oil removal tank 1 at the beginning of the solution flow direction is defined as an inlet tank 11, and the oil removal tank 1 at the end of the solution flow direction is defined as an outlet tank 12. In the specific work, the adsorbed material and the nickel sulfate solution to be removed are simultaneously added into the inlet tank 11, and the mixture of the adsorbed material and the nickel sulfate solution flows through the multiple oil removal tanks 1 in turn towards the outlet tank 12. In this process, the adsorbed material flows with the nickel sulfate solution and continuously moves up and down under the action of the water potential of the nickel sulfate solution, can fully contact with the oil in the nickel sulfate solution, and has sufficient oil absorption reaction time. Finally, after being discharged from the outlet tank 12, the adsorbed material after absorbing oil enters the filter structure 2, at this time, the adsorbed material after absorbing oil is intercepted by the filter structure 2, and the nickel sulfate solution after oil removal passes through the filter structure 2, realizing the oil removal of the nickel sulfate solution.

[0031] In this way, in the present scheme, the adsorbed material and the nickel sulfate solution to be removed can be continuously added into the inlet tank 11, when the adsorbed material and the nickel sulfate solution flow between the multiple oil removal tanks 1 in turn, the adsorbed material and the oil can be fully contacted, the oil absorption effect is ensured, the oil can be continuously removed, and the nickel sulfate solution oil removal efficiency is improved.

[0032] Specifically, the oil removal tank 1 at the head end of the solution flow direction is used to access the oil absorption material and the solution to be deoiled. In addition, the filter structure 2 is used to intercept the oil absorption material in the fluid output by the oil removal tank 1 at the tail end of the solution flow direction, and to pass through the solution after removing the oil absorption material.

[0033] It should be noted that the solution flow direction is the flow direction of the nickel sulfate solution between the plurality of oil removal tanks 1, so as to facilitate the description of the present application. Figure 2 For example, the solution flow direction is from left to right. The head end of the solution flow direction refers to the left end, and the tail end of the solution flow direction refers to the right end.

[0034] In addition, it should be understood that the flow of the nickel sulfate solution between the plurality of oil removal tanks 1 can be achieved by pumping, or by the liquid level difference in each oil removal tank 1, or by other forms.

[0035] In one embodiment, the heights of the plurality of oil removal tanks 1 are arranged in a decreasing order, and a flow guide structure 3 is arranged between adjacent two oil removal tanks 1, and the flow guide structure 3 connects the adjacent two oil removal tanks 1.

[0036] In this embodiment, the height difference is arranged between the plurality of oil removal tanks 1 in sequence, so that the solution in the head-end oil removal tank 1 can flow to the subsequent oil removal tank 1 under the action of gravity, thereby improving the flow property of the solution and saving the cost of setting a pump body.

[0037] It should be noted that the plurality of oil removal tanks 1 can be arranged in sequence and the flow guide structure 3 can be arranged as a flow guide opening of the oil removal tank 1; or the flow guide structures can be arranged at intervals and the flow guide structure 3 can be arranged as a flow guide groove on the ground.

[0038] In one embodiment, please refer to Figure 2 and Figure 3 The flow guide structure 3 includes a flow guide pipe 31 and a flow guide valve 32, and the two ends of the flow guide pipe 31 are connected to the adjacent two oil removal tanks 1, and the flow guide valve 32 is arranged on the flow guide pipe 31.

[0039] In this embodiment, the flow guide pipe 31 is connected to the adjacent two oil removal tanks 1, and the flow guide valve 32 is arranged on the flow guide pipe 31 to flexibly control the flow of the solution in the flow guide pipe 31. Specifically, the flow guide valve 32 in this scheme is arranged as an electromagnetic valve.

[0040] It should be noted that the adsorption material can be porous activated carbon particles, or can be fiber adsorption balls or resin oil absorption balls, etc. Specifically, in this scheme, the adsorption material is porous activated carbon particles. In addition, in order to improve the quality of the nickel sulfate solution, three material pipes 9 are correspondingly arranged at the liquid inlet tank 11, and the three material pipes 9 respectively input porous activated carbon particles, high acid and hydrogen peroxide into the liquid inlet tank 11, and valves and pump bodies are arranged on each material pipe 9.

[0041] In one embodiment, the plurality of oil removal grooves 1 near the front end of the solution flow direction are respectively provided with access pipes 14 for accessing oil absorption materials and the solution to be deoiled. Correspondingly, the plurality of oil removal grooves 1 near the end of the solution flow direction are respectively provided with delivery pipes 15 connected to the filter structure 2.

[0042] In this embodiment, the plurality of oil removal grooves 1 provided with access pipes 14 are defined as liquid receiving grooves, and the oil removal grooves 1 provided with delivery pipes 15 are defined as liquid discharge grooves. The oil removal grooves 1 between the liquid receiving grooves and the liquid discharge grooves are defined as transition grooves 13, and the plurality of liquid receiving grooves, transition grooves 13 and the plurality of liquid discharge grooves are sequentially connected. In this way, the nickel sulfate solution to be deoiled can be simultaneously delivered into the plurality of liquid receiving grooves, and the nickel sulfate solution in the front liquid receiving groove can flow through the rear liquid receiving groove in sequence, thereby improving the liquid inlet efficiency and ensuring the flow distance of the nickel sulfate solution, thereby improving the mixing ability of the nickel sulfate solution during the flow process. The access pipes 14 are all connected to the liquid inlet pipe 6.

[0043] Similarly, the plurality of liquid discharge grooves can simultaneously output the nickel sulfate solution to the filter structure 2, and the nickel sulfate solution in the front liquid discharge groove can also flow into the rear liquid discharge groove in sequence, thereby prolonging the flow distance of the nickel sulfate solution and further improving the discharge efficiency.

[0044] Specifically, in this embodiment, the oil removal grooves 1 are provided with six, including two liquid receiving grooves at the front end, two transition grooves 13 and two liquid discharge grooves at the rear end. The two liquid receiving grooves, two transition grooves 13 and two liquid discharge grooves are sequentially connected.

[0045] It should be noted that in this embodiment, the adsorption material is set as porous activated carbon particles, and the oil is absorbed by the activated carbon particles. At this time, the filter structure 2 can be set as a filter screen, or a filter cloth, or other forms.

[0046] In one embodiment, the filter structure 2 includes an output pipe 21, a filter press 22 and a filter press pump 23, the output pipe 21 is connected to the filter press 22 and the oil removal groove 1 at the end of the solution flow direction, and the filter press pump 23 is arranged in the output pipe 21.

[0047] In the embodiment, the filter is in the form of a filter press 22, and the solution output from the outlet tank 12 is pumped to the filter press 22 by a filter press pump 23, and the porous activated carbon in the filter press 22 is filtered, and the filtered nickel sulfate solution is deoiled. It should be noted that the specific structure and principle of the filter press 22 are prior art, and will not be described here. In addition, it should be understood that, since activated carbon is a microporous material with a very high specific surface area, it can adsorb oil molecules; when activated carbon adsorbs oil molecules, these molecules will adhere to the pore walls of activated carbon, forming a layer of coverage, and even under a certain degree of extrusion pressure, the adsorbed oil molecules cannot be released again.

[0048] In addition, it should be noted that in the embodiment, two output pipes 21 and filter press pumps 23 are provided, respectively, two output pipes 21 are connected to two delivery pipes and the filter press 22, respectively, and two filter press pumps 23 are provided on the two output pipes 21, respectively, to achieve one standby for one.

[0049] In one of the embodiments, the filter structure 2 further comprises an acid-base meter 24, and the acid-base meter 24 is arranged on the output pipe 21.

[0050] In the embodiment, an acid-base meter (pH meter) is arranged on the output pipe 21, and the pH meter is connected to a distributed control system (DCS control system) to monitor the pH value of the output nickel sulfate solution online. At the same time, the pilot valve is also connected to the DCS control system.

[0051] In one of the embodiments, referring to Figure 1 and Figure 4 , the nickel sulfate solution deoiling system further comprises a heat exchanger 4, a liquid storage tank 5, and a liquid inlet pipe 6, the heat exchanger 4 has a high-temperature flow channel and a heat exchange flow channel, the high-temperature flow channel is used to connect a high-temperature fluid and is connected to the liquid storage tank 5, and the liquid inlet pipe 6 is connected to the heat exchange flow channel and the deoiling tank 1 at the head end of the solution flow direction to transport the solution to be deoiled.

[0052] In the embodiment, high-temperature steam is introduced into the high-temperature flow channel of the heat exchanger 4, and the liquid inlet pipe 6 is connected to the heat exchange flow channel of the heat exchanger 4, so that the nickel sulfate solution input into the system can exchange heat with the high-temperature steam, and the heat-exchanged nickel sulfate solution is between 45-55℃, thereby improving the deoiling effect. In addition, the high-temperature steam condenses into condensed water in the high-temperature flow channel and enters the liquid storage tank 5, which can be recycled. Specifically, a water outlet pipe 51 can be arranged on the liquid storage tank 5, and a condensed water pump 52 can be arranged on the water outlet pipe 51 to pump the condensed water stored in the liquid storage tank 5 to the filter press 22 to wash the filter cloth of the filter press 22.

[0053] It is to be noted that, in an embodiment, a thermometer 62 is arranged on the liquid inlet pipe 6, and the thermometer 62 is arranged on the side of the heat exchanger 4 close to the liquid inlet groove 11. The high-temperature flow channel of the heat exchanger 4 is communicated with a steam pipe 8, and the steam pipe 8 is used for conveying high-temperature steam to the high-temperature flow channel.

[0054] In one of the embodiments, a plurality of liquid inlet pipes 6 and heat exchangers 4 are arranged respectively, the plurality of liquid inlet pipes 6 and the plurality of heat exchangers 4 are one-to-one corresponding, each liquid inlet pipe 6 is communicated with the heat exchange flow channel of the corresponding heat exchanger 4, and the plurality of liquid inlet pipes 6 are all communicated with the oil removal groove 1 at the first end of the solution flow direction.

[0055] In the embodiment, the plurality of liquid inlet pipes 6 and the plurality of heat exchangers 4 are arranged, so as to improve the liquid inlet efficiency and the heat exchange efficiency of the nickel sulfate solution and the high-temperature steam. Specifically, in the scheme, two liquid inlet pipes 6 and two heat exchangers 4 are arranged respectively. The two liquid inlet pipes 6 and the two heat exchangers 4 are one-to-one corresponding, and the two liquid inlet pipes 6 are connected with two liquid inlet grooves 11 respectively. In addition, the two liquid inlet grooves 11 are respectively provided with three material pipes 9, so as to input high acid, hydrogen peroxide and activated carbon.

[0056] In one of the embodiments, the nickel sulfate solution oil removal system further comprises a solution tank 7 and a plurality of liquid inlet pumps 61, the solution tank 7 is used for containing the solution to be removed oil, and is communicated with the plurality of liquid inlet pipes 6 respectively, and the plurality of liquid inlet pumps 61 are arranged on the plurality of liquid inlet pipes 6 respectively.

[0057] In the embodiment, the solution tank 7 is arranged to store the nickel sulfate solution to be removed oil, and then the nickel sulfate solution in the solution tank 7 is conveyed to the oil removal groove 1 through the liquid inlet pump 61 and the liquid inlet pipe 6, so as to reduce the probability of solution flow interruption, and at the same time, the nickel sulfate solution can also play a certain role in the solution tank 7, that is, the nickel sulfate solution can be settled and impurities can be removed, so as to improve the quality of the nickel sulfate solution. Specifically, in the scheme, two liquid inlet pumps 61 are arranged, the two liquid inlet pumps 61 are arranged on the two liquid inlet pipes 6 respectively, and valves are arranged on the two liquid inlet pipes 6 respectively. Each of the valves can be arranged as an electromagnetic valve, so as to be controlled in real time.

[0058] In order to better understand the utility model, the following will be combined with the specific description of the embodiments of the utility model. Figures 1 to 4 The technical scheme of the utility model will be described in detail.

[0059] In the scheme, the liquid inlet groove 11 pumps the high acid through one material pipe 9, so as to adjust the pH value of the nickel sulfate solution to be between 2 and 3. A pH meter is arranged on the output pipe 21 of the front end of the filter pump 23, so as to measure the pH value of the nickel sulfate solution on line, to be fed back to the DCS control system in real time, and the opening degree of the valve on the liquid inlet pipe 6 is adjusted according to the monitoring value of the pH meter, so as to maintain the pH value of the nickel sulfate solution in the normal range.

[0060] At the same time, the liquid inlet groove 11 adds activated carbon through another material pipe 9, the activated carbon can adsorb oil in the nickel sulfate solution, control the TOC (organic carbon) content in the solution ≤40mg / L, so that the product of subsequent production meets the requirements. And the liquid inlet groove 11 also adds 50% hydrogen peroxide solution through the third material pipe 9, so that the product of subsequent production of nickel sulfate has gloss.

[0061] In addition, when the liquid inlet groove 6 is filled with liquid, the temperature of the nickel sulfate solution after heat exchange through the heat exchanger 4 is required to be between 45-55℃. The DCS control logic controls the opening degree of the steam valve through negative feedback control of the temperature measurement value. When the temperature of the nickel sulfate solution is greater than 55℃, the control logic closes the opening degree of the steam valve; when the temperature of the nickel sulfate solution is less than 45℃, the DCS control logic opens the opening degree of the steam valve. The temperature meter 62 maintains the measurement value between 45-55℃. The nickel sulfate solution can be fully contacted with hydrogen peroxide, high acid and activated carbon, and the reaction time is sufficient to meet the production needs. And the condensed water produced by steam condensation is transported to the filter cloth washing tank by the condensate pump 52 for recycling.

[0062] The scheme has high automation degree, can automatically control the temperature and pH value of the nickel sulfate solution, reduces the production cost, and achieves the effect of energy saving and consumption reduction.

[0063] The specific implementation mode of the utility model described above does not constitute the limitation of the protection scope of the utility model. Any various other corresponding changes and deformations according to the technical concept of the utility model should be included in the protection scope of the utility model claim.

Claims

1. A system for removing oil from a nickel sulfate solution, characterized by The system comprises: a plurality of oil removal tanks, the plurality of oil removal tanks being sequentially connected, and the solution in one end of the oil removal tank being able to flow into the oil removal tank at the other end; and a filter structure connected to the oil removal tank at the end of the solution flow direction, for intercepting the oil-absorbing material in the fluid output by the oil removal tank at the end of the solution flow direction.

2. The nickel sulfate liquor deoiling system of claim 1, wherein, The height of the plurality of oil removal tanks is sequentially reduced, and a flow guide structure is arranged between adjacent two oil removal tanks, and the flow guide structure connects the adjacent two oil removal tanks.

3. The nickel sulfate liquor deoiling system of claim 2, wherein, The flow guide structure comprises a flow guide pipe and a flow guide valve, both ends of the flow guide pipe are connected to the adjacent two oil removal tanks respectively, and the flow guide valve is arranged in the flow guide pipe.

4. The nickel sulfate liquor deoiling system of claim 1, wherein, The plurality of oil removal tanks close to the beginning of the solution flow direction are respectively provided with an access pipeline, and the access pipeline is used for accessing the oil-absorbing material and the solution to be deoiled.

5. The nickel sulfate liquor deoiling system of claim 1, wherein, The plurality of oil removal tanks close to the end of the solution flow direction are respectively provided with a delivery pipeline, and the delivery pipeline is connected to the filter structure.

6. The nickel sulfate liquor deoiling system of claim 1, wherein, The filter structure comprises an output pipe, a filter press and a filter press pump, the output pipe is connected to the filter press and the oil removal tank at the end of the solution flow direction, and the filter press pump is arranged in the output pipe.

7. The nickel sulfate liquor deoiling system of claim 6, wherein, The filter structure further comprises a pH meter, and the pH meter is arranged in the output pipe.

8. The nickel sulfate liquor deoiling system of any one of claims 1 to 7, wherein, The nickel sulfate solution deoiling system further comprises a heat exchanger, a liquid storage tank and a liquid inlet pipe, the heat exchanger has a high-temperature flow channel and a heat exchange flow channel, the high-temperature flow channel is used for accessing high-temperature fluid and is connected to the liquid storage tank, and the liquid inlet pipe is connected to the heat exchange flow channel and the oil removal tank at the beginning of the solution flow direction, and is used for conveying the solution to be deoiled.

9. The nickel sulfate liquor deoiling system of claim 8, wherein, The liquid inlet pipe and the heat exchanger are respectively provided with a plurality of liquid inlet pipes and a plurality of heat exchangers, the plurality of liquid inlet pipes and the plurality of heat exchangers are one-to-one corresponding, each liquid inlet pipe is connected to the heat exchange flow channel of the corresponding heat exchanger, and the plurality of liquid inlet pipes are all connected to the oil removal tank at the beginning of the solution flow direction.

10. The nickel sulfate liquor deoiling system of claim 9, wherein, The nickel sulfate solution deoiling system further comprises a solution tank and a plurality of liquid inlet pumps, the solution tank is used for containing the solution to be deoiled and is connected to the plurality of liquid inlet pipes respectively, and the plurality of liquid inlet pumps are arranged in the plurality of liquid inlet pipes respectively.

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