Battery powder leaching waste gas treatment device

Abstract

The utility model discloses a battery powder leaching waste gas treatment device, and relates to the technical field of waste battery recycling, the battery powder leaching waste gas treatment device comprises a leaching tank, an absorption tank, a first fan, a spray tower and a second fan, the absorption tank is used for storing absorption liquid, the absorption liquid is used for absorbing dust and acid mist, the first fan is provided with a first pipeline, and the spray tower is provided with a second pipeline; the first fan is provided with a first pipeline and is respectively connected to the leaching tank and the absorption tank through a first pipeline, the first pipeline is internally provided with a first conductive part, the first conductive part is connected with a first grounding wire, the spray tower is used for spraying alkali liquor, the second fan is provided with a second pipeline and is respectively connected to the absorption tank and the spray tower through a second pipeline, and the second pipeline is internally provided with a second conductive part; and the second conductive piece is connected with a second grounding wire. According to the battery powder leaching waste gas treatment device disclosed by the utility model, the blockage of the spray tower can be reduced, the production efficiency is improved, the risk of fire and explosion can be reduced, the safety is better, and in addition, the treatment cost is lower.

Description

Technical Field

[0001] The utility model relates to the technical field of waste battery recycling, in particular to an exhaust gas treatment device for battery powder leaching. Background Art

[0002] In the battery powder extraction process of waste power batteries, strong acids such as sulfuric acid are used for leaching reactions. The leaching reactions are generally carried out under high-temperature conditions. During the reaction process, a large amount of mixed exhaust gas containing acid mist, dust, and hydrogen generated by the reaction is produced. To avoid environmental pollution caused by the escape of the mixed exhaust gas, in the prior art, generally, a fan is used to pump the mixed exhaust gas to a spray tower. The spray tower performs alkali spraying on the mixed exhaust gas. After removing the acid mist and dust, it is then discharged.

[0003] The existing exhaust gas treatment devices have the following drawbacks: First, after long-term use, dust will continuously accumulate in the spray tower, resulting in the blockage of the spray tower and inability to operate normally. Furthermore, it is necessary to stop production regularly for cleaning, reducing production efficiency. Second, when the exhaust gas is pumped by the fan and moves at high speed, static electricity is easily generated and fire and explosion may occur. In addition, to achieve up-to-standard discharge, a large amount of alkali is required to absorb the acid mist, resulting in high treatment costs. Summary of the Utility Model

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. For this purpose, the utility model provides an exhaust gas treatment device for battery powder leaching, which can not only reduce the blockage of the spray tower, improve production efficiency, but also reduce the risk of fire and explosion, with better safety. In addition, the treatment cost is lower.

[0005] The exhaust gas treatment device for battery powder leaching according to an embodiment of the utility model includes a leaching tank, an absorption tank, a first fan, a spray tower, and a second fan. The absorption tank is used to store an absorption liquid, and the absorption liquid is used to absorb dust and acid mist. The first fan is provided with a first pipeline and is connected to the leaching tank and the absorption tank respectively through the first pipeline. A first conductive member is provided in the first pipeline, and the first conductive member is connected to a first grounding wire. The spray tower is used to spray alkali liquid. The second fan is provided with a second pipeline and is connected to the absorption tank and the spray tower respectively through the second pipeline. A second conductive member is provided in the second pipeline, and the second conductive member is connected to a second grounding wire.

[0006] The exhaust gas treatment device for battery powder leaching according to an embodiment of the utility model has at least the following beneficial effects:

[0007] Add battery black powder and strong acid into the leaching tank, and conduct a leaching reaction at high temperature. The mixed waste gas containing acid mist, dust and hydrogen generated during the reaction process is transported to the absorption tank through the first fan. The absorption liquid in the absorption tank can absorb part of the dust and acid mist. Then the waste gas is transported to the spray tower through the second fan. The alkali liquid sprayed by the spray tower can remove the remaining dust and acid mist in the waste gas, so that the waste gas meets the emission standards. According to the battery powder leaching waste gas treatment device of the embodiment of the present invention, since part of the dust and acid mist have been absorbed by the absorption liquid in the absorption tank before the waste gas enters the spray tower, it can not only reduce the situation of dust clogging the spray tower, the spray tower does not need to be shut down and cleaned frequently, improving the production efficiency, but also less alkali liquid is required for the spray tower, thus making the treatment cost lower. In addition, a first conductive member connected to a first ground wire is provided in the first pipeline, and a second conductive member connected to a second ground wire is provided in the second pipeline, so that the static electricity in the first pipeline and the second pipeline can be eliminated, thereby reducing the risk of fire and explosion and having better safety.

[0008] According to some embodiments of the present invention, the first conductive member extends to both ends in the length direction of the first pipeline; and / or, the second conductive member extends to both ends in the length direction of the second pipeline.

[0009] According to some embodiments of the present invention, the first ground wire is connected to the first fan; and / or, the second ground wire is connected to the second fan.

[0010] According to some embodiments of the present invention, the leaching tank is provided with a third conductive member, one end of the third conductive member is located inside the leaching tank, and the third conductive member is connected to a third ground wire.

[0011] According to some embodiments of the present invention, the bottom end of the absorption tank is connected with a return pipe, the other end of the return pipe is connected to the leaching tank, and the return pipe is provided with a first pump.

[0012] According to some embodiments of the present invention, the leaching tank is provided with a first stirring device for stirring the inside of the leaching tank.

[0013] According to some embodiments of the present invention, the absorption tank is provided with a second stirring device for stirring the inside of the absorption tank.

[0014] According to some embodiments of the present invention, a plurality of spray pipes arranged vertically are provided in the spray tower, at least part of the spray pipes are connected with a circulation pipe, the circulation pipe is connected to the bottom end of the spray tower, and the circulation pipe is provided with a second pump.

[0015] According to some embodiments of the present utility model, the spray tower is connected with an exhaust stack, and all the spray pipes are located above the position of the spray tower where the exhaust stack is connected, and all the spray pipes are located below the position of the spray tower where the second pipeline is connected.

[0016] According to some embodiments of the present utility model, the absorption liquid is set as pure water; and / or, the alkali liquid is set as sodium hydroxide solution.

[0017] Some additional aspects and advantages of the present utility model will be given in the following description, some advantages will become obvious from the following description, or be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The following further describes the present utility model in conjunction with the drawings and embodiments, where:

[0019] Figure 1 is a schematic structural diagram of a battery powder leaching waste gas treatment device according to an embodiment of the present utility model;

[0020] Figure 2 is an installation schematic diagram of the first conductive member;

[0021] Figure 3 is an installation schematic diagram of the second conductive member.

[0022] Reference numerals in the drawings:

[0023] Leaching tank 100; Third conductive member 101; Third ground wire 102; First stirring device 103;

[0024] Absorption tank 200; Return pipe 201; First pump 202; Second stirring device 203; Pure water inlet pipe 204;

[0025] First fan 300; First pipeline 301; First conductive member 302; First ground wire 303;

[0026] Spray tower 400; Spray pipe 401; Circulation pipe 402; Second pump 403;

[0027] Second fan 500; Second pipeline 501; Second conductive member 502; Second ground wire 503;

[0028] Exhaust stack 600. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] Embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation of the present utility model.

[0030] In the description of the present utility model, it should be understood that with respect to the orientation description, such as up, down, etc., the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model.

[0031] In the description of the present utility model, "a plurality of" refers to two or more. If there is a description of first and second, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or the sequence relationship of the indicated technical features.

[0032] In the description of the present utility model, unless otherwise clearly defined, words such as "arrangement", "installation", "connection", etc. should be understood in a broad sense. Those skilled in the art can reasonably determine the specific meanings of the above words in the present utility model in combination with the specific content of the technical solution.

[0033] Next, reference is made to Figures 1 to 3 Describe a battery powder leaching waste gas treatment device according to an embodiment of the present utility model.

[0034] Referring to Figures 1 to 3 As shown, the battery powder leaching waste gas treatment device according to an embodiment of the present utility model includes a leaching tank 100, an absorption tank 200, a first fan 300, a spray tower 400, and a second fan 500.

[0035] Among them, the leaching tank 100 is used to store strong acid and battery black powder. During use, strong acid such as sulfuric acid and black powder are added into the leaching tank 100, heated to a high temperature and stirred to carry out the leaching reaction to dissolve metals such as nickel, cobalt, manganese, and lithium in the battery black powder, thereby realizing the extraction and recovery of metals such as nickel, cobalt, manganese, and lithium. The leaching reaction is a common process in the wet extraction process of battery powder, and its principle will not be elaborated here. A large amount of acid mist is generated during the leaching reaction, and a large amount of dust is generated during the feeding process. In addition, hydrogen is generated during the reaction, so a mixed waste gas containing acid mist, dust, and hydrogen is formed.

[0036] The first fan 300 is provided with a first pipeline 301, and is respectively connected to the leaching tank 100 and the absorption tank 200 through the first pipeline 301. A first conductive member 302 is provided in the first pipeline 301, and the first conductive member 302 is connected to a first grounding wire 303. Specifically, the first pipeline 301 can include two sections. One section of the first pipeline 301 is connected to the air inlet end of the first fan 300 and is connected to the leaching tank 100, and the other section of the first pipeline 301 is connected to the air outlet end of the first fan 300 and is connected to the absorption tank 200. The first fan 300 conveys the waste gas in the leaching tank 100 to the absorption tank 200 through the first pipeline 301. The absorption tank 200 is used to store the absorption liquid, and the absorption liquid in the absorption tank 200 can absorb part of the dust and acid mist. The first conductive member 302 can be set as a stainless steel wire, such as 316L stainless steel wire, which has good acid resistance, high structural strength and good conductivity. Of course, the first conductive member 302 can also be made of other suitable materials, such as titanium alloy material or Hastelloy material, which will not be elaborated here. The first conductive member 302 is connected to the first grounding wire 303. The static electricity generated by the high-speed flow of the waste gas in the first pipeline 301 can be transmitted to the first conductive member 302 and eliminated through the first grounding wire 303 to avoid the risk of fire and explosion caused by excessive static electricity accumulation.

[0037] The second fan 500 is provided with a second pipeline 501, and is respectively connected to the absorption tank 200 and the spray tower 400 through the second pipeline 501. A second conductive member 502 is provided in the second pipeline 501, and the second conductive member 502 is connected to a second grounding wire 503. Specifically, the second pipeline 501 can include two sections. One section of the second pipeline 501 is connected to the air inlet end of the second fan 500 and is connected to the absorption tank 200, and the other section of the second pipeline 501 is connected to the air outlet end of the second fan 500 and is connected to the spray tower 400. The second fan 500 conveys the waste gas in the absorption tank 200 to the spray tower 400 through the second pipeline 501. The spray tower 400 is used to spray the alkali liquid, and the sprayed alkali liquid can absorb the dust and acid mist. The second conductive member 502 can be set as a stainless steel wire, such as 316L stainless steel wire, which has good acid resistance, high structural strength and good conductivity. Of course, the second conductive member 502 can also be made of other suitable materials, such as titanium alloy material or Hastelloy material, which will not be elaborated here. The second conductive member 502 is connected to the second grounding wire 503. The static electricity generated by the high-speed flow of the waste gas in the second pipeline 501 can be transmitted to the second conductive member 502 and eliminated through the second grounding wire 503 to avoid the risk of fire and explosion caused by excessive static electricity accumulation.

[0038] In the present utility model, battery black powder and strong acid are added into the leaching tank 100, and a leaching reaction is carried out at high temperature. The mixed waste gas containing acid mist, dust and hydrogen generated during the reaction process is transported to the absorption tank 200 by the first fan 300. The absorption liquid in the absorption tank 200 can absorb part of the dust and acid mist. Then, the waste gas is transported to the spray tower 400 by the second fan 500. The alkali liquid sprayed by the spray tower 400 can remove the remaining dust and acid mist in the waste gas, so that the waste gas meets the emission standards.

[0039] For the waste gas treatment device for battery powder leaching according to the embodiment of the present utility model, since part of the dust and acid mist have been absorbed by the absorption liquid in the absorption tank 200 before the waste gas enters the spray tower 400, it can not only reduce the situation of dust clogging the spray tower 400, the spray tower 400 does not need to be shut down and cleaned frequently, improving the production efficiency, but also the spray tower 400 requires less alkali liquid, thus making the treatment cost lower. In addition, a first conductive member 302 connected to a first grounding wire 303 is provided in the first pipeline 301, and a second conductive member 502 connected to a second grounding wire 503 is provided in the second pipeline 501. Therefore, the static electricity in the first pipeline 301 and the second pipeline 501 can be eliminated, thereby reducing the risk of fire and explosion and having better safety.

[0040] In some embodiments of the present utility model, the first conductive member 302 extends to both ends in the length direction of the first pipeline 301. With this arrangement, the first conductive member 302 can absorb the static electricity at various positions in the length direction of the first pipeline 301, and the effect of eliminating the static electricity in the first pipeline 301 is better, thereby further reducing the risk of fire and explosion and having better safety.

[0041] In some embodiments of the present utility model, the second conductive member 502 extends to both ends in the length direction of the second pipeline 501. With this arrangement, the second conductive member 502 can absorb the static electricity at various positions in the length direction of the second pipeline 501, and the effect of eliminating the static electricity in the second pipeline 501 is better, thereby further reducing the risk of fire and explosion and having better safety.

[0042] Reference Figure 1 As shown in the figure, in some embodiments of the present utility model, the first grounding wire 303 is connected to the first fan 300. In this embodiment, in addition to being connected to the first conductive member 302 in the first pipeline 301, the first grounding wire 303 is also connected to the first fan 300 itself, so as to eliminate the static electricity on the first fan 300, thereby further reducing the risk of fire and explosion and having better safety.

[0043] Reference Figure 1As shown, in some embodiments of the present utility model, the second grounding wire 503 is connected to the second fan 500. In this embodiment, in addition to being connected to the second conductive member 502 in the second pipeline 501, the second grounding wire 503 is also connected to the second fan 500 itself, thereby being able to eliminate the static electricity on the second fan 500, further reducing the risk of fire and explosion, and having better safety.

[0044] Reference Figure 1 As shown, in some embodiments of the present utility model, the leaching tank 100 is provided with a third conductive member 101. One end of the third conductive member 101 is located inside the leaching tank 100, and the third conductive member 101 is connected to a third grounding wire 102. For example, the third conductive member 101 can be entirely located inside the leaching tank 100, or one end can be inside the leaching tank 100 and the other end extends outside the leaching tank 100. The third conductive member 101 can be set as a Hastelloy rod. Hastelloy has good acid resistance, high structural strength, and good electrical conductivity. Of course, the third conductive member 101 can also be made of other suitable materials, such as titanium alloy materials or stainless steel materials, which will not be elaborated here. The static electricity generated during the leaching reaction in the leaching tank 100 can be transmitted to the third grounding wire 102 through the third conductive member 101 and eliminated through the third grounding wire 102, further reducing the risk of fire and explosion and having better safety.

[0045] Reference Figure 1 As shown, in some embodiments of the present utility model, the bottom end of the absorption tank 200 is connected to a return pipe 201, and the other end of the return pipe 201 is connected to the leaching tank 100. The return pipe 201 is provided with a first pump 202. For example, one end of the return pipe 201 is connected to the bottom end of the absorption tank 200 and communicates with the inner cavity of the absorption tank 200, and the other end of the return pipe 201 can be connected to the top end of the leaching tank 100 and communicate with the inner cavity of the leaching tank 100. The first pump 202 is used to pump the absorption liquid containing a certain amount of acid mist and dust in the absorption tank 200 back to the leaching tank 100 through the return pipe 201 for reuse, thereby not only reducing the waste of strong acid but also reducing the waste of battery powder to be treated, being more energy-saving and environmentally friendly.

[0046] Reference Figure 1As shown, in some embodiments of the present utility model, the leaching tank 100 is provided with a first stirring device 103, and the first stirring device 103 is used to stir the inside of the leaching tank 100. For example, the first stirring device 103 may include a first stirring shaft, the first stirring shaft is vertically arranged in the leaching tank 100 and extends into the leaching tank 100. A first stirring blade may be provided on the part of the first stirring shaft inside the leaching tank 100. The top end of the first stirring shaft may be connected to a first driving motor, and the first driving motor controls the rotation of the first stirring shaft, and the first stirring shaft then drives the first stirring blade to rotate, so as to stir the materials in the leaching tank 100 evenly, thereby promoting the leaching reaction and improving the leaching effect.

[0047] Reference Figure 1 As shown, in some embodiments of the present utility model, the absorption tank 200 is provided with a second stirring device 203, and the second stirring device 203 is used to stir the inside of the absorption tank 200. For example, the second stirring device 203 may include a second stirring shaft, the second stirring shaft is vertically arranged in the absorption tank 200 and extends into the absorption tank 200. A second stirring blade may be provided on the part of the second stirring shaft inside the absorption tank 200. The top end of the second stirring shaft may be connected to a second driving motor, and the second driving motor controls the rotation of the second stirring shaft, and the second stirring shaft then drives the second stirring blade to rotate, so as to stir the materials in the absorption tank 200 evenly, thereby promoting the effect of the absorption liquid in absorbing acid mist and dust.

[0048] Reference Figure 1 As shown, in some embodiments of the present utility model, a plurality of spray pipes 401 arranged vertically are provided in the spray tower 400. At least part of the spray pipes 401 is connected to a circulation pipe 402, the circulation pipe 402 is connected to the bottom end of the spray tower 400, and a second pump 403 is provided on the circulation pipe 402. The spray pipe 401 may be provided with a plurality of nozzles, and the plurality of nozzles may be arranged along the length direction of the spray pipe 401. The spray pipe 401 sprays out the alkaline solution through the nozzles. After the waste gas enters the spray tower 400, the alkaline solution sprayed out by the nozzles can neutralize the acid mist, and the alkaline solution can also absorb dust, so that the waste gas is discharged up to standard.

[0049] In this embodiment, a plurality of spray pipes 401 are provided and arranged vertically, so that the sprayed alkaline solution is more evenly distributed, and the effect of absorbing acid mist and dust is better. In addition, at least part of the spray pipes 401 is connected to a circulation pipe 402, the circulation pipe 402 is connected to the bottom end of the spray tower 400, and a second pump 403 is provided on the circulation pipe 402. When the alkaline solution is sprayed out from the spray pipe 401, it will drip to the bottom end of the spray pipe 401, and the second pump 403 can pump the alkaline solution accumulated at the bottom end of the spray pipe 401 back into the spray pipe 401 through the circulation pipe 402 for recycling, reducing the waste of the alkaline solution.

[0050] Reference Figure 1As shown, in some embodiments of the present utility model, the spray tower 400 is connected to an exhaust stack 600. All the spray pipes 401 are located above the position where the spray tower 400 is connected to the exhaust stack 600, and all the spray pipes 401 are located below the position where the spray tower 400 is connected to the second pipeline 501. After the acid mist and dust are absorbed by the alkali solution, the qualified waste gas is discharged through the exhaust stack 600. Since all the spray pipes 401 are located above the position where the spray tower 400 is connected to the exhaust stack 600 and all the spray pipes 401 are located below the position where the spray tower 400 is connected to the second pipeline 501, when the waste gas enters the spray pipes 401 from the second pipeline 501, it needs to pass through all the spray pipes 401 before being discharged from the exhaust stack 600. This makes the effect of the alkali solution sprayed by the spray pipes 401 in absorbing the acid mist and dust better. In addition, after the waste gas enters the spray tower 400, it moves from top to bottom, and compared with moving from bottom to top, the moving speed is slower, so it is more fully absorbed by the alkali solution, and the removal effect of the acid mist and dust is better.

[0051] It should be noted that during actual installation, the top of the exhaust stack 600 can be higher than the factory building roof to reduce the impact of the waste gas on the environment and the physical health of the staff.

[0052] In some embodiments of the present utility model, the absorption liquid is set as pure water. For example, a pure water inlet pipe 204 can be provided at the top of the absorption tank 200, and the pure water inlet pipe 204 is used to supply pure water into the absorption tank 200. In this embodiment, setting the absorption liquid as pure water not only has a better effect on absorbing the acid mist and dust, but also is convenient to obtain and has an affordable price. In addition, when it is pumped back to the leaching tank 100 through the reflux pipe 201, it will not affect the leaching reaction. It should be noted that the absorption liquid can also be other liquids, such as alkali solution, which will not be elaborated here.

[0053] In some embodiments of the present utility model, the alkali solution is set as sodium hydroxide solution. The sodium hydroxide solution can undergo a neutralization reaction with strong acids to remove the remaining acid mist in the waste gas, and the removal effect is good. Moreover, the sodium hydroxide solution has a wide source and a low cost. In addition, the reaction produces water and inorganic salts, which is more energy-saving and environmentally friendly. It should be noted that the alkali solution can also be other liquids, such as potassium hydroxide, ammonia water, etc.

[0054] The above has described the embodiments of the present utility model in detail with reference to the drawings. However, the present utility model is not limited to the above embodiments, and various changes can be made without departing from the gist of the present utility model within the knowledge scope of those of ordinary skill in the art.

Claims

1. A battery powder leaching waste gas treatment device, characterized in that: include: leaching tank; An absorption tank, used for storing absorption liquid, wherein the absorption liquid is used for absorbing dust and acid mist; A first fan is provided with a first pipeline and is respectively connected to the leaching tank and the absorption tank through the first pipeline, wherein a first conductive member is provided in the first pipeline and is connected to a first grounding wire; Spray tower, used to spray alkali solution; The second fan is provided with a second pipeline and is respectively connected to the absorption tank and the spray tower through the second pipeline. A second conductive member is provided in the second pipeline, and the second conductive member is connected to a second grounding wire.

2. The battery powder leaching waste gas treatment device according to claim 1, characterized in that: The first conductive member extends to both ends of the first pipe in the length direction; and / or, The second conductive member extends to both ends of the second pipe in the length direction.

3. The battery powder leaching waste gas treatment device according to claim 1, characterized in that: The first grounding wire is connected to the first fan; and / or, The second grounding wire is connected to the second fan.

4. The battery powder leaching waste gas treatment device according to any one of claims 1 to 3, characterized in that: The leaching tank is provided with a third conductive member, one end of the third conductive member is located inside the leaching tank, and the third conductive member is connected to a third grounding wire.

5. The battery powder leaching waste gas treatment device according to any one of claims 1 to 3, characterized in that: The bottom end of the absorption tank is connected with a reflux pipe, the other end of the reflux pipe is connected with the leaching tank, and the reflux pipe is provided with a first pump.

6. The battery powder leaching waste gas treatment device according to any one of claims 1 to 3, characterized in that: The leaching tank is provided with a first stirring device, and the first stirring device is used to stir the inside of the leaching tank.

7. The battery powder leaching waste gas treatment device according to any one of claims 1 to 3, characterized in that: The absorption tank is provided with a second stirring device, and the second stirring device is used to stir the absorption tank.

8. The battery powder leaching waste gas treatment device according to any one of claims 1 to 3, characterized in that: A plurality of spray pipes arranged vertically are arranged in the spray tower, at least some of the spray pipes are connected to a circulation pipe connected to the bottom end of the spray tower, and the circulation pipe is provided with a second pump.

9. The battery powder leaching waste gas treatment device according to claim 8, characterized in that: The spray tower is connected to an exhaust chimney, and all the spray pipes are located above the position of the spray tower connected to the exhaust chimney, and all the spray pipes are located below the position of the spray tower connected to the second pipeline.

10. The battery powder leaching waste gas treatment device according to any one of claims 1 to 3, characterized in that: The absorption liquid is set to pure water; and / or, The alkali solution is set to be a sodium hydroxide solution.

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