Waste lithium battery pyrolysis recovery waste gas treatment device

Abstract

The utility model discloses a waste gas treatment device for pyrolysis recovery of waste lithium batteries. The waste gas treatment device comprises a spraying mechanism, a drying mechanism and a filtering mechanism, the spraying mechanism comprises a shell, guide pipes are arranged on the two sides of the shell, a driving part is installed on the top of the shell, the output end of the driving part is connected to a pipe body extending into the shell, the upper end of the pipe body penetrates through the shell and is rotationally connected to a water pumping end, and the water pumping end is connected to the water pumping end. One end, far away from the pipe body, of the water pumping end is communicated with the shell; the drying mechanism communicates with the interior of the shell through the guide pipe. The waste gas purification device has the beneficial effects that the technical problems that in the prior art, a large amount of flue gas is generated after the waste lithium battery is pyrolyzed, the purification efficiency of the existing waste gas purification equipment on the flue gas is low, and the resource is wasted as spraying liquid reacting with the flue gas cannot be reutilized are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery pyrolysis waste gas treatment, and in particular to a waste gas treatment device for pyrolysis recovery of waste lithium batteries. Background Art

[0002] Pyrolysis is a process of heating the polluted medium and the organic pollutants it contains to a sufficient temperature through direct or indirect heat exchange, so that the organic pollutants can be volatilized or separated from the polluted medium. In recent years, the impact of waste batteries on the environment has become one of the hot topics in the domestic media. Whether the waste batteries are in the atmosphere or buried deep underground, their heavy metal components will overflow with the seepage, causing groundwater and soil pollution, which will seriously endanger human health over time. At present, the zinc-iron alloy or manganese-iron alloy in the waste lithium batteries can be effectively recycled by crushing and recycling, and can also be recycled in the waste lithium batteries. Zinc, manganese, iron and other metals stored in lithium batteries can be effectively recycled; waste lithium batteries are mainly composed of an outer shell and an internal battery core, and the outer shell is stainless steel, nickel-plated metal steel shell or plastic shell; the internal battery core of the battery is a roll structure, mainly composed of a positive electrode, a negative electrode, a separator, and an electrolyte; however, before the waste lithium batteries are crushed and recycled, it is usually necessary to heat-treat harmful substances such as sulfides and nitrogen-containing compounds in the waste lithium batteries so that the harmful substances can be fully separated. The pyrolysis process can be effectively completed by thermal desorption equipment, but a large amount of dust and smoke is usually generated after the pyrolysis of waste lithium batteries;

[0003] In Chinese utility model CN218608804U, a "system for purifying waste lithium battery pyrolysis flue gas" is proposed. The device can achieve a uniform spraying effect during the flue gas purification of waste lithium batteries. Although the device has a certain spraying effect, the spraying efficiency is poor and it cannot ensure that the flue gas is fully in contact with the spraying liquid. Secondly, the liquid after spraying cannot be reused, resulting in a waste of resources. Utility Model Content

[0004] The purpose of the utility model is to overcome the above-mentioned technical deficiencies and provide a waste gas treatment device for pyrolysis recovery of waste lithium batteries, so as to solve the technical problem that in the prior art, a large amount of flue gas will be generated after pyrolysis of waste lithium batteries, the existing waste gas purification equipment has a low purification efficiency for the flue gas, and the spray liquid reacting with the flue gas cannot be reused, thereby causing a waste of resources.

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

[0006] In the first aspect, the utility model provides a waste gas treatment device for pyrolysis recovery of waste lithium batteries, comprising:

[0007] A spray mechanism, comprising a shell, with conduits arranged on both sides of the shell, a driving unit installed on the top of the shell, an output end of the driving unit connected to a tube body extending into the shell, an upper end of the tube body passing through the shell and rotatably connected to a water pumping end, and an end of the water pumping end away from the tube body is connected to the shell;

[0008] a drying mechanism, the drying mechanism being in communication with the interior of the housing through the conduit; and

[0009] A filtering mechanism, wherein one end of the drying mechanism away from the shell is communicated with the filtering mechanism.

[0010] In some embodiments, the lower end of the shell is connected to a reflux shell, one end of the water pumping end extends into the reflux shell, and the lower end of the shell inner cavity is provided with a plurality of water-permeable holes connected to the reflux shell.

[0011] In some embodiments, the duct includes an air inlet pipe and an air outlet pipe, both of which are connected to the shell, a dust removal screen is installed in the air inlet pipe, and the end of the air outlet pipe away from the shell is connected to the drying mechanism.

[0012] In some embodiments, the number of the tube bodies is three, and the driving part includes a motor, a main gear, and three sub-gears; the output end of the motor is connected to the main gear, and the main gear is arranged at the center position of the upper end of the shell, and the three sub-gears are fixed on the outer wall of the tube body that passes through the shell, and the three tube bodies are arranged circumferentially in a triangular shape on the outer periphery of the main gear, and the three sub-gears are meshed on the main gear.

[0013] In some embodiments, the tube body penetrates the outer wall of the shell, and is fixedly connected to a limit block at the upper end of the auxiliary gear, and the limit block is rotatably connected to the water pumping end.

[0014] In some embodiments, a plurality of spray heads are located in the shell and connected to any one of the tubes.

[0015] In some embodiments, the water pumping end includes a water pumping pipe, a pump body, a drain pipe, a diverter pipe and three extension pipes, one end of the water pumping pipe is connected to the interior of the reflux shell, the other end of the water pumping pipe is connected to the pump body, the drain pipe is connected to the pump body, the end of the drain pipe away from the pump body is connected to the diverter pipe, the lower end of the diverter pipe is connected to the three extension pipes, the lower ends of the three extension pipes are connected to a sleeve, the limit block is rotatably connected in the sleeve, and the pipe body is connected to the sleeve.

[0016] In some embodiments, the cross-section of the reflux shell is an inverted trapezoid, and a first filter screen and a second filter screen are sequentially arranged in the reflux shell from top to bottom.

[0017] In some embodiments, the drying mechanism includes an air duct and a plurality of absorbent cottons; the air duct is a Z-shaped tube body, one end of the air duct is connected to the shell, and the other end is connected to the filtering mechanism, and the plurality of absorbent cottons are arranged in the air duct from top to bottom.

[0018] In some embodiments, the filtering mechanism includes a filter shell, a flow equalizing net, an activated carbon mesh plate and a filter membrane plate; the filter shell is connected to one end of the air duct, and the flow equalizing net, the activated carbon filter mesh plate and the filter membrane plate are arranged in the filter shell from left to right.

[0019] Compared with the prior art, the utility model provides a waste gas treatment device for pyrolysis recovery of used lithium batteries, which guides the flue gas generated by pyrolysis into a shell through a conduit, and drives the tube body inside the shell to rotate circumferentially through a driving part. When the tube body is running, the pumping end draws the spraying liquid inside the shell, and guides it into the tube body through the pumping end, so that the tube body rotates and sprays the flue gas in the shell. The liquid after spraying can flow back into the shell for secondary utilization, thereby achieving a better throttling effect. Secondly, the sprayed gas enters the drying mechanism, dries and absorbs the moisture in the gas, and finally filters the gas through the filtering mechanism, so that it finally meets the emission standards. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the waste gas treatment device for pyrolysis recovery of waste lithium batteries provided by an embodiment of the utility model;

[0021] Figure 2 It is a schematic diagram of the back side of the waste gas treatment device for pyrolysis recovery of waste lithium batteries provided by an embodiment of the utility model;

[0022] Figure 3 This is a schematic diagram of the pumping end structure of the waste gas treatment device for pyrolysis recovery of waste lithium batteries provided by an embodiment of the utility model;

[0023] Figure 4 It is a schematic diagram of the interior of the reflux shell of the waste gas treatment device for pyrolysis recovery of waste lithium batteries provided in an embodiment of the utility model.

[0024] Explanation of the reference numerals: 1. spray mechanism; 11. shell; 111. water permeable hole; 12. conduit; 121. air inlet pipe; 122. air outlet pipe; 13. drive unit; 131. motor; 132. main gear; 133. sub gear; 14. pipe body; 141. limit block; 142. spray head; 15. pumping end; 151. pumping pipe; 152. pump body; 153. drain pipe; 154. diverter pipe; 155. extension pipe; 1551. sleeve; 16. reflux shell; 161. first filter screen; 162. second filter screen; 2. drying mechanism; 21. air guide pipe; 22. absorbent cotton; 3. filtering mechanism; 31. filter shell; 311. flow equalizing net; 312. activated carbon mesh plate; 313. filter membrane plate. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0026] In order to solve the technical problem in the prior art that a large amount of flue gas will be generated after the pyrolysis of waste lithium batteries, the existing waste gas purification equipment has a low purification efficiency for the flue gas, and the spray liquid that reacts with the flue gas cannot be reused, thereby causing a waste of resources, the utility model provides a waste gas treatment device for pyrolysis and recovery of waste lithium batteries, which can achieve full contact between the flue gas and the spray liquid, thereby improving the spraying efficiency of the spray liquid, and secondly the liquid after spraying can be reused, thereby avoiding the technical effect of wasting resources.

[0027] It should be noted that the waste gas treatment device for pyrolysis recovery of waste lithium batteries described in the utility model is used for but not limited to the field of lithium battery waste gas treatment. For the convenience of explanation, in the utility model, only the application of the waste gas treatment device for pyrolysis recovery of waste lithium batteries in lithium battery waste gas treatment is taken as an example for explanation, and the principle of applying the waste gas treatment device for pyrolysis recovery of waste lithium batteries in other types of equipment is essentially the same as the principle applied in the field of lithium battery waste gas treatment, which will not be elaborated here.

[0028] See also Figure 1 , Figure 1 This is a schematic diagram of the structure of a waste gas treatment device for pyrolysis recovery of waste lithium batteries in one embodiment of the utility model, a waste gas treatment device for pyrolysis recovery of waste lithium batteries, comprising: a spraying mechanism 1, a drying mechanism 2 and a filtering mechanism 3;

[0029] The spray mechanism 1 comprises a housing 11, with conduits 12 arranged on both sides of the housing 11, a driving unit 13 installed on the top of the housing 11, an output end of the driving unit 13 connected to a tube body 14 extending into the housing 11, an upper end of the tube body 14 passes through the housing 11 and is rotatably connected to a water pumping end 15, and an end of the water pumping end 15 away from the tube body 14 is connected to the housing 11;

[0030] The drying mechanism 2 is connected to the interior of the housing 11 through the conduit 12; and,

[0031] One end of the drying mechanism 2 away from the housing 11 is communicated with the filtering mechanism 3 .

[0032] In this embodiment, the flue gas generated by pyrolysis is introduced into the shell 11 through the conduit 12, and the tube body 14 inside the shell 11 is driven to rotate circumferentially through the driving part 13. When the tube body 14 is running, the pumping end 15 extracts the spraying liquid inside the shell 11, and guides it into the tube body 14 through the pumping end 15, so that the tube body 14 rotates and sprays the flue gas in the shell 11. Since the liquid is returned to the shell 11, the liquid after spraying can be reused, achieving a better throttling effect. Secondly, the sprayed gas enters the drying mechanism 2, is dried and absorbs moisture in the gas, and finally the gas is filtered through the filtering mechanism 3, so that it finally meets the emission standards.

[0033] In one embodiment, see Figure 1 In order to improve the communication efficiency between the shell 11 and the reflux shell 16, the lower end of the shell 11 is connected to the reflux shell 16, one end of the water pumping end 15 extends into the reflux shell 16, and the lower end of the inner cavity of the shell 11 is provided with a plurality of water-permeable holes 111 connected to the reflux shell 16. The cross-section of the reflux shell 16 is an inverted trapezoid, and the first filter screen 161 and the second filter screen 162 are sequentially arranged in the reflux shell 16 from top to bottom.

[0034] In this embodiment, a water permeable hole 111 is opened at the bottom of the inner cavity of the shell 11 to facilitate the spray liquid after spraying to flow into the reflux shell 16 through the water permeable hole 111, and the spray liquid is filtered by the first filter screen 161 and the second filter screen 162 in the reflux shell 16, thereby ensuring that the liquid can be reused.

[0035] In one embodiment, see Figure 1-Figure 3 In order to improve the gas circulation efficiency, the duct 12 includes an air inlet pipe 121 and an air outlet pipe 122. The air inlet pipe 121 and the air outlet pipe 122 are both connected to the shell 11. A dust removal screen is installed in the air inlet pipe 121, and the end of the air outlet pipe 122 away from the shell 11 is connected to the drying mechanism 2.

[0036] In this embodiment, the air inlet pipe 121 and the air outlet pipe 122 are interconnected with the shell 11, and a dust removal screen is installed in the air inlet pipe 121 to filter larger solid particles in the gas before the gas enters the shell 11, thereby ensuring the subsequent spraying effect.

[0037] In one embodiment, see Figure 1-Figure 3 In order to improve the spraying efficiency, the number of the tube bodies 14 is three, and the driving part 13 includes a motor 131, a main gear 132, and three sub-gears 133; the output end of the motor 131 is connected to the main gear 132, and the main gear 132 is arranged at the center position of the upper end of the shell 11. The three sub-gears 133 are fixed on the outer wall of the tube body 14 that passes through the shell 11, and the three tube bodies 14 are arranged in a triangular shape on the outer periphery of the main gear 132. The main gear 132 is meshed with three sub-gears 133. The tube body 14 passes through the outer wall of the shell 11, and the upper end of the sub-gear 133 is also fixedly connected to a limiting block 141, and the limiting block 141 is rotatably connected to the water pumping end 15, which is located in the shell 11. A plurality of sprinkler heads 142 are connected inside and on any one of the tube bodies 14. The pumping end 15 includes a pumping pipe 151, a pump body 152, a drain pipe 153, a diverter pipe 154 and three extension pipes 155. One end of the pumping pipe 151 is connected to the inside of the reflux shell 16, and the other end of the pumping pipe 151 is connected to the pump body 152. The pump body 152 is connected to the drain pipe 153. The end of the drain pipe 153 away from the pump body 152 is connected to the diverter pipe 154. The lower end of the diverter pipe 154 is connected to three extension pipes 155. The lower ends of the three extension pipes 155 are connected to a sleeve 1551. The sleeve 1551 is rotatably connected to the limiting block 141, and the tube body 14 is connected to the sleeve 1551.

[0038] The tube body 14 is a structure with a sealed lower end and an open upper end. The lower end of the tube body 14 is rotatably connected to the housing 11 through a bearing seat, and the upper end passes through the housing 11 and is rotatably connected to the sleeve 1551 through a limit block 141, so that the tube body 14 is connected to the extension tube 155. The main gear 132 is driven by the motor 131 to rotate. The main gear 132 cooperates with the three sub-gears 133 on the periphery to drive the three tube bodies 14 to rotate. At the same time, the pump body 152 and the water pumping pipe 151 cooperate to extract the spray liquid inside the reflux shell 16 and pass it through the pump body 152. The liquid is diverted to three extension tubes 155 through the drain pipe 153 and the diversion pipe 154, and is directed from the extension tube 155 to the inside of the tube body 14. The gas inside the shell 11 is rotationally sprayed through the spray head 142 on the tube body 14, so that the gas is fully in contact with the spray liquid. Since the shell 11 is circular, the internal space of the shell 11 is not large, so the gas can be fully in contact with the spray liquid, and a water inlet and a drain port are opened on the reflux shell 16, which is convenient for adding spray liquid to the inside of the reflux shell 16 or discharging waste liquid.

[0039] In one embodiment, see Figure 3 and Figure 4 In order to further improve the exhaust gas treatment efficiency, the drying mechanism 2 includes an air duct 21 and a plurality of absorbent cottons 22; the air duct 21 is a Z-shaped tube body 14, one end of the air duct 21 is connected to the shell 11, and the other end is connected to the filter mechanism 3, and the plurality of absorbent cottons 22 are arranged from top to bottom in the air duct 21; the filter mechanism 3 includes a filter shell 31, a flow equalizing net 311, an activated carbon mesh plate 312 and a filter membrane plate 313; the filter shell 31 is connected to one end of the air duct 21, and the flow equalizing net 311, the activated carbon filter mesh plate and the filter membrane plate 313 are arranged from left to right in the filter shell 31.

[0040] In this embodiment, a Z-shaped tube body 14 is used to prolong the flow time of the gas in the air duct 21, thereby facilitating the absorbent cotton 22 to absorb moisture in the gas, and introducing the gas from the shell 11 into the filter shell 31 through the air duct 21, and evenly introducing the gas into the filter shell 31 through the flow equalizing net 311, thereby facilitating the gas to fully contact with the activated carbon mesh plate 312 and the filter membrane plate 313, further absorbing and filtering harmful substances in the gas, thereby achieving a better filtering effect.

[0041] In order to better understand the present invention, the following Figures 1 to 4 The technical solution of the utility model is described in detail: the exhaust gas generated during the pyrolysis process is introduced into the shell 11 by the intake pipe 121, and the motor 131 is started at this time. The output end of the motor 131 drives the main gear 132 to rotate, and the main gear 132 and the three sub-gears 133 on the periphery rotate, and drive the tube body 14 to rotate circumferentially in the shell 11. When the tube body 14 is rotating, the spray liquid in the reflux shell 16 is extracted through the cooperation of the pump body 152 and the water pumping pipe 151, and the liquid is introduced into the color tube through the drain pipe 153 and the diversion pipe 154. Since the lower end of the extension pipe 155 is fixed with a sleeve 1551, the tube body 14 is rotatably connected in the sleeve 1551 through the limit block 141, so the extension pipe 155 can synchronously introduce the liquid into the tube body 14. The exhaust gas inside the shell 11 is sprayed through the spray head 142 on the tube body 14. Since there are three tube bodies 14, which are arranged in a triangular shape in the circular shell 11, the three tube bodies 14 rotate synchronously to spray, so that the gas can fully contact with the spray liquid, thereby achieving a better spraying effect. The liquid after spraying passes through the water-permeable hole 111 and flows back into the reflux shell 16. After being filtered through the first filter screen 161 and the second filter screen 162, it can be reused, which greatly improves the utilization efficiency of the spray liquid. The sprayed gas enters the air duct 21, absorbs moisture through multiple absorbent cottons 22, enters the filter shell 31, is filtered through the flow equalizing net 311, the activated carbon mesh plate 312 and the filter membrane plate 313, and is discharged outward.

[0042] The specific implementation methods of the utility model described above do not constitute a limitation on the protection scope of the utility model. Any other corresponding changes and modifications made according to the technical concept of the utility model should be included in the protection scope of the claims of the utility model.

Claims

1. A waste gas treatment device for pyrolysis recovery of waste lithium batteries, characterized in that: include: A spray mechanism, comprising a shell, with conduits arranged on both sides of the shell, a driving unit installed on the top of the shell, an output end of the driving unit connected to a tube body extending into the shell, an upper end of the tube body passing through the shell and rotatably connected to a water pumping end, and an end of the water pumping end away from the tube body is connected to the shell; a drying mechanism, the drying mechanism being in communication with the interior of the housing through the conduit; and A filtering mechanism, wherein one end of the drying mechanism away from the shell is communicated with the filtering mechanism.

2. The waste gas treatment device for pyrolysis recovery of waste lithium batteries according to claim 1 is characterized in that: The lower end of the shell is connected to a reflux shell, one end of the water pumping end extends into the reflux shell, and the lower end of the inner cavity of the shell is provided with a plurality of water-permeable holes connected to the reflux shell.

3. The waste gas treatment device for pyrolysis recovery of waste lithium batteries according to claim 1 is characterized in that: The duct comprises an air inlet pipe and an air outlet pipe, both of which are connected to the shell, a dust removal screen is installed in the air inlet pipe, and one end of the air outlet pipe away from the shell is connected to the drying mechanism.

4. A waste gas treatment device for pyrolysis recovery of waste lithium batteries according to claim 2, characterized in that: The number of the tube bodies is three, and the driving part includes a motor, a main gear, and three sub-gears; the output end of the motor is connected to the main gear, and the main gear is arranged at the center position of the upper end of the shell, and the three sub-gears are fixed on the outer wall of the tube body that passes through the shell, and the three tube bodies are arranged circumferentially in a triangular shape on the outer periphery of the main gear, and the three sub-gears are meshed on the main gear.

5. A waste gas treatment device for pyrolysis recovery of waste lithium batteries according to claim 4, characterized in that: The tube body penetrates through the outer wall of the shell, and is fixedly connected to a limiting block at the upper end of the auxiliary gear, and the limiting block is rotatably connected to the water pumping end.

6. The waste gas treatment device for pyrolysis recovery of waste lithium batteries according to claim 5 is characterized by: A plurality of spray heads are located in the shell and connected to any one of the pipe bodies.

7. The waste gas treatment device for pyrolysis recovery of waste lithium batteries according to claim 5 is characterized by: The water pumping end includes a water pumping pipe, a pump body, a drain pipe, a diversion pipe and three extension pipes. One end of the water pumping pipe is connected to the inside of the reflux shell, and the other end of the water pumping pipe is connected to the pump body. The pump body is connected to the drain pipe, and the end of the drain pipe away from the pump body is connected to the diversion pipe. The lower end of the diversion pipe is connected to the three extension pipes, and the lower ends of the three extension pipes are connected to a sleeve. The limit block is rotatably connected in the sleeve, and the pipe body is connected to the sleeve.

8. The waste gas treatment device for pyrolysis recovery of waste lithium batteries according to claim 2 is characterized by: The cross section of the reflux shell is an inverted trapezoid, and a first filter screen and a second filter screen are sequentially arranged in the reflux shell from top to bottom.

9. The waste gas treatment device for pyrolysis recovery of waste lithium batteries according to claim 1 is characterized by: The drying mechanism includes an air duct and a plurality of absorbent cottons; the air duct is a Z-shaped tube body, one end of the air duct is connected to the shell, and the other end is connected to the filtering mechanism, and the plurality of absorbent cottons are arranged in the air duct from top to bottom.

10. The waste gas treatment device for pyrolysis recovery of waste lithium batteries according to claim 9, characterized in that: The filter mechanism includes a filter shell, a flow equalizing net, an activated carbon mesh plate and a filter membrane plate; the filter shell is connected to one end of the air duct, and the flow equalizing net, the activated carbon mesh plate and the filter membrane plate are arranged from left to right in the filter shell.

Images