A device for recovering waste gas discharged in lithium ion battery production

Abstract

The utility model provides a kind of waste gas recovery device of lithium ion battery production discharge, comprising: recovery tank, the top of recovery tank is fixedly connected with inlet pipe, the bottom of inlet pipe is connected with heat recovery pipe, the inside of heat recovery pipe and inlet pipe is fixedly connected with heat recovery component, the inside bottom of recovery tank is fixedly connected with spiral channel, the middle part of spiral channel is penetrated with the bottom of heat recovery pipe, the inside of spiral channel is equipped with NMP solvent, the liquid level of NMP solvent is lower than the height of spiral channel, waste gas enters from inlet pipe, and the heat in waste gas is recycled by heat recovery component, waste gas that completes heat recovery enters the inside of spiral channel, waste gas flows in spiral channel, by the setting of spiral channel, the travel of waste gas in the inside of spiral channel can be greatly increased, so that waste gas is better contacted with NMP solvent, meanwhile, waste gas makes NMP solvent push out wave, so that waste gas is fully contacted with NMP solvent, so that NMP solvent can better waste gas purification.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery production technology, and in particular to a waste gas recovery device for lithium-ion battery production emissions. Background Technology

[0002] Lithium-ion batteries are a type of battery that uses lithium metal or lithium alloys as the negative electrode material and a non-aqueous electrolyte solution. Due to the highly reactive chemical properties of lithium metal, its processing, storage, and use require stringent environmental regulations. With the development of science and technology, lithium-ion batteries have become mainstream. The large amounts of NMP (nitrogen peroxide) vapors generated during lithium-ion battery production contain various chemical components harmful to human health and the natural environment. NMP recovery equipment can effectively recycle and reuse this waste gas, not only reducing energy consumption in lithium-ion battery production but also effectively controlling harmful waste gas emissions within national environmental standards through multiple absorption processes.

[0003] However, existing waste gas recovery equipment cannot fully recover the waste heat of NMP waste gas. Therefore, a waste gas recovery device for lithium-ion battery production emissions is proposed. Utility Model Content

[0004] To address at least one of the aforementioned technical shortcomings, this utility model provides a waste gas recovery device for lithium-ion battery production, comprising: a recovery tank, an air inlet pipe fixedly connected to the top of the recovery tank, a heat recovery pipe connected to the bottom of the air inlet pipe, a heat recovery assembly fixedly connected inside the heat recovery pipe and the air inlet pipe, a spiral channel fixedly connected to the bottom of the recovery tank, the middle of the spiral channel penetrating the bottom of the heat recovery pipe, and NMP solvent disposed inside the spiral channel, with the NMP solvent level lower than the height of the spiral channel.

[0005] Furthermore, the interior of the recovery tank is equipped with a spirally arranged filter channel located on the upper layer of the spiral channel. The filter channel is located on the periphery of the heat recovery pipe. Several filter elements are installed inside the filter channel to fill the filter channel. The end of the filter channel is equipped with an air outlet pipe extending out of the outer wall of the recovery tank.

[0006] Furthermore, a conduit connected to the spiral channel is fixedly connected to the outer wall of the recycling tank.

[0007] Furthermore, the outer wall of the recovery tank is equipped with a transparent window for observing the NMP solvent level inside the spiral channel, and the transparent window is equipped with scale lines.

[0008] Furthermore, the top of the recycling tank is fitted with a sealing cap, and the air inlet pipe is fixedly connected to the middle of the sealing cap.

[0009] Furthermore, the heat recovery assembly includes an outer spiral tube and an inner spiral tube, with their bottom ends connected together. The top end of the outer spiral tube is the inlet for the heat transfer medium, and the top end of the inner spiral tube is the outlet for the heat transfer medium. Beneficial effects

[0010] Exhaust gas enters through the inlet pipe and its heat is recovered by the heat recovery component. The heat-recovered exhaust gas then enters the spiral channel, where it flows. The spiral channel design significantly increases the travel distance of the exhaust gas, allowing for better contact between the exhaust gas and the NMP solvent. Simultaneously, the exhaust gas pushes the NMP solvent out in waves, ensuring full contact between the exhaust gas and the NMP solvent and enabling better purification of the exhaust gas.

[0011] During heat recovery, the heat transfer medium enters from the top of the outer spiral tube, moves downwards with the exhaust gas, then enters the bottom of the inner spiral tube from the bottom of the outer spiral tube, moves upwards against the exhaust gas, and is discharged from the top of the inner spiral tube, thus recovering heat through the heat transfer medium.

[0012] The purpose, features, and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Attached Figure Description

[0013] Figure 1 This is the overall front view of this utility model.

[0014] Figure 2 This is an overall axial sectional view of the present invention.

[0015] Figure 3 This is an isometric view of the filter element of this utility model.

[0016] Figure 4 This is an isometric view of the filter channel of this utility model.

[0017] Figure 5 This is an isometric view of the heat recovery pipe of this utility model.

[0018] Figure 6 This is an isometric view of the heat recovery component of this utility model.

[0019] exist Figures 1 to 6 The correspondence between the component names or lines and the attached drawing numbers is as follows: recovery tank 1, sealing cover 101, spiral channel 102, filter channel 103, filter element 104, air outlet pipe 105, heat recovery pipe 106, air inlet pipe 2, heat recovery assembly 3, outer spiral pipe 301, inner spiral pipe 302. Detailed Implementation

[0020] Please refer to Figures 1 to 6 ; This embodiment provides a waste gas recovery device for lithium-ion battery production emissions, referencing... Figures 1 to 5 The system includes: a recovery tank 1, an air inlet pipe 2 fixedly connected to the top of the recovery tank 1, a heat recovery pipe 106 connected to the bottom of the air inlet pipe 2, a heat recovery assembly 3 fixedly connected inside the heat recovery pipe 106 and the air inlet pipe 2, a spiral channel 102 fixedly connected to the bottom of the recovery tank 1, the middle part of the spiral channel 102 penetrating the bottom of the heat recovery pipe 106, and NMP solvent inside the spiral channel 102, with the liquid level of the NMP solvent being lower than the height of the spiral channel 102.

[0021] In practical implementation, the exhaust gas enters through the inlet pipe 2, and the heat in the exhaust gas is recovered by the heat recovery component 3. The exhaust gas that has completed heat recovery enters the interior of the spiral channel 102. The exhaust gas flows in the spiral channel 102. The spiral channel 102 is designed to greatly increase the travel distance of the exhaust gas inside the spiral channel 102, allowing the exhaust gas to come into better contact with the NMP solvent. At the same time, the exhaust gas causes the NMP solvent to be pushed out in waves, so that the exhaust gas and the NMP solvent can come into full contact, and the NMP solvent can better purify the exhaust gas.

[0022] NMP uses existing technologies.

[0023] Further reference Figure 5 Inside the recovery tank 1, a spiral filter channel 103 is provided on the upper layer of the spiral channel 102. The filter channel 103 is located on the periphery of the heat recovery pipe 106. Several filter elements 104 are installed inside the filter channel 103 to fill the inside of the filter channel 103. An air outlet pipe 105 extending out of the outer wall of the recovery tank 1 is provided at the end of the filter channel 103.

[0024] In practice, the exhaust gas re-enters the filtration channel 103 and is filtered by the filter element 104 to remove particulate matter.

[0025] Furthermore, a conduit connected to the spiral channel 102 is fixedly connected to the outer wall of the recycling tank 1.

[0026] In practice, the NMP solvent in the spiral channel 102 is replaced by setting up a conduit.

[0027] Furthermore, the outer wall of the recovery tank 1 is provided with a transparent window for observing the NMP solvent level inside the spiral channel 102, and the transparent window is provided with scale lines.

[0028] In practice, the transparent window and scale lines are used to observe the liquid level of NMP solvent.

[0029] Furthermore, the top of the recycling tank 1 is fitted with a sealing cover 101, and the air inlet pipe 2 is fixedly connected to the middle of the sealing cover 101.

[0030] In practice, the sealing cover 101 can be removed to install the filter element 104.

[0031] Further reference Figure 6 The heat recovery assembly 3 includes an outer spiral tube 301 and an inner spiral tube 302. The bottom ends of the outer spiral tube 301 and the inner spiral tube 302 are connected together. The top end of the outer spiral tube 301 is the inlet of the heat transfer medium, and the top end of the inner spiral tube 302 is the outlet of the heat transfer medium.

[0032] In practical implementation, during heat recovery, the heat transfer medium enters from the top of the outer spiral tube 301, moves downward with the direction of the exhaust gas, then enters the bottom of the inner spiral tube 302 from the bottom of the outer spiral tube 301, moves upward against the direction of the exhaust gas, and then exits from the top of the inner spiral tube 302, thus recovering heat through the heat transfer medium.

[0033] When in use, several recycling tanks 1 can be connected in series.

Claims

1. A waste gas recovery device for lithium-ion battery production, comprising: The recovery tank (1) is characterized in that: an air inlet pipe (2) is fixedly connected to the top of the recovery tank (1), a heat recovery pipe (106) is connected to the bottom of the air inlet pipe (2), a heat recovery assembly (3) is fixedly connected inside the heat recovery pipe (106) and the air inlet pipe (2), a spiral channel (102) is fixedly connected to the bottom of the recovery tank (1), the middle part of the spiral channel (102) penetrates the bottom of the heat recovery pipe (106), and NMP solvent is provided inside the spiral channel (102), the liquid level of the NMP solvent is lower than the height of the spiral channel (102).

2. The waste gas recovery device for lithium-ion battery production according to claim 1, characterized in that: Inside the recovery tank (1), a spiral filter channel (103) is provided on the upper layer of the spiral channel (102). The filter channel (103) is located on the periphery of the heat recovery pipe (106). Several filter elements (104) are installed inside the filter channel (103) to fill the filter channel (103). At the end of the filter channel (103), an air outlet pipe (105) extends out of the outer wall of the recovery tank (1).

3. The waste gas recovery device for lithium-ion battery production according to claim 2, characterized in that: The outer wall of the recycling tank (1) is fixedly connected with a conduit that is connected to the spiral channel (102).

4. The waste gas recovery device for lithium-ion battery production according to claim 3, characterized in that: The outer wall of the recovery tank (1) is provided with a transparent window for observing the NMP solvent level inside the spiral channel (102), and the transparent window is provided with scale lines.

5. The waste gas recovery device for lithium-ion battery production according to claim 4, characterized in that: The top of the recycling tank (1) is fitted with a sealing cover (101), and the air inlet pipe (2) is fixedly connected to the middle of the sealing cover (101).

6. The waste gas recovery device for lithium-ion battery production according to claim 5, characterized in that: The heat recovery assembly (3) includes an outer spiral tube (301) and an inner spiral tube (302). The bottom ends of the outer spiral tube (301) and the inner spiral tube (302) are connected together. The top end of the outer spiral tube (301) is the inlet of the heat transfer medium, and the top end of the inner spiral tube (302) is the outlet of the heat transfer medium.

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