Spraying and filtering equipment based on waste battery extraction processing waste gas emission

Abstract

The invention relates to the technical field of waste gas treatment, in particular to integrated equipment for treating waste battery wet extraction waste gas, which comprises a treatment tank, the bottom of the treatment tank is communicated with a gas inlet connecting pipeline, and a molecular sieve for adsorbing organic matters is arranged in the treatment tank; one side of the upper part of the treatment tank is communicated with a separation assembly, the separation assembly is used for carrying out desorption regeneration on a molecular sieve, the cooling assembly is used for carrying out cooling liquefaction on high-concentration gas generated by desorption, and the spraying assembly is used for carrying out spraying purification on waste gas subjected to preliminary adsorption. According to the spraying and filtering equipment based on waste battery extraction processing waste gas emission, efficient recovery and cyclic utilization of a high-value volatile organic compound solvent are achieved through the process combination of molecular sieve adsorption, nitrogen desorption regeneration and condensation recovery, waste is turned into wealth, the operation cost is greatly reduced, and secondary pollution is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of waste gas treatment, in particular to an integrated device for treating waste battery wet extraction waste gas. BACKGROUND

[0002] In the recycling process of waste batteries, especially lithium ion batteries, wet metallurgical technology is often used, that is, using extractant to separate and purify valuable metals (such as cobalt, nickel, manganese, lithium, etc.) from leaching solution. In this extraction process, complex process waste gas is generated, and the main pollutants include volatile organic solvents (such as P507, Cyanex series extractants, etc.), volatile organic diluents (such as kerosene, sulfonated kerosene, etc.) and possibly entrained trace amounts of acidic gases (such as HF, HCl, etc.).

[0003] In the prior art, single methods are often used to treat such waste gas, such as directly using alkaline liquid spray tower or activated carbon adsorption device. Direct spraying is effective for removing water-soluble acidic gases, but the treatment efficiency of high-concentration, water-insoluble volatile organic compounds is low, and it can cause secondary water pollution. Single activated carbon adsorption has limited adsorption capacity, needs frequent replacement or regeneration, has high operation cost, and the discarded activated carbon is difficult to dispose as hazardous waste. In addition, the existing technology lacks effective recovery means for volatile organic compounds after adsorption and concentration, and closed-loop treatment scheme for spray waste liquid, resulting in resource waste and potential environmental risk.

[0004] Based on this, in order to realize the staged and efficient purification and resource recovery of waste gas, the present application discloses an integrated treatment device based on molecular sieve adsorption, high-temperature nitrogen desorption regeneration, condensation recovery and spray purification. SUMMARY

[0005] To solve the problems of low treatment efficiency, high operation cost and secondary pollution in the background art, the present application provides a spray filtration device for treating waste battery extraction process waste gas, which organically integrates adsorption concentration, desorption regeneration, condensation recovery, spray purification and waste liquid treatment, forms an intelligent and resourceful waste gas treatment device, and includes a treatment tank, a gas inlet connecting pipeline is communicated with the bottom of the treatment tank, a molecular sieve for adsorbing organic matter is arranged in the treatment tank. A separation assembly is communicated with one side of the upper part of the treatment tank, and the separation assembly is used for desorption regeneration of the molecular sieve. A cooling assembly is communicated with the upper part of the treatment tank, and the cooling assembly is used for cooling and liquefying the high-concentration gas generated by desorption. A spray assembly is communicated with the other side of the upper part of the treatment tank, and the spray assembly is used for spray purification of the waste gas after preliminary adsorption.

[0006] As a further improvement of the technical solution, the separation assembly comprises a nitrogen generator, a nitrogen heater, a pipeline A, a distributor and an electric valve A; the outlet of the nitrogen generator is communicated with the inlet of the nitrogen heater, the outlet of the nitrogen heater is communicated with the distributor through the pipeline A, the distributor is fixedly arranged above the inside of the treatment tank, and the electric valve A is installed on the pipeline A.

[0007] As a further improvement of the technical solution, the cooling assembly comprises a pipeline B, an electric valve B, a serpentine coil pipe, a cooling box, a support frame and a separation tank; one end of the pipeline B is communicated with the top of the treatment tank, the electric valve B is installed on the pipeline B, the other end of the pipeline B is communicated with the inlet of the serpentine coil pipe, the serpentine coil pipe is arranged in the inside of the cooling box, the bottom of the cooling box is fixedly connected with the support frame, the outlet of the serpentine coil pipe is communicated with the inlet of the separation tank, the surface of the separation tank is provided with a scale table, the top of the separation tank is provided with an exhaust port, and the bottom of the separation tank is communicated with a liquid discharge pipe with a connecting flange.

[0008] As a further improvement of the technical solution, the spraying assembly comprises a spraying tower, one side of the bottom of the spraying tower is communicated with the top of the treatment tank through a pipeline C, a concentration sensor is arranged on the pipeline C, a fixed net is arranged in the inside of the spraying tower, and the fixed net is filled with plastic floating balls.

[0009] As a further improvement of the technical solution, the spraying tower is further provided with a circulating pump, a circulating pipeline A, a circulating pipeline B and an atomizing nozzle; one end of the circulating pipeline A is communicated with the lower part of the spraying tower, the other end is communicated with the inlet of the circulating pump, the outlet of the circulating pump is communicated with the atomizing nozzle through the circulating pipeline B, and the atomizing nozzle is fixed to the top of the inner cavity of the spraying tower; the spraying tower is further provided with a liquid level sensor, a pH meter and a conductivity meter.

[0010] As a further improvement of the technical solution, an alkali liquid dosing unit and a water supplementing unit are further included; the alkali liquid dosing unit comprises an alkali liquid tank, a conveying pump A and a pipeline D, the pipeline D is communicated between the outlet of the conveying pump A and the lower part of the spraying tower, the inlet of the conveying pump A is communicated with the alkali liquid tank, the water supplementing unit comprises a water tank, a conveying pump B and a pipeline E, the pipeline E is communicated between the outlet of the conveying pump B and the lower part of the spraying tower, and the inlet of the conveying pump B is communicated with the water tank.

[0011] As a further improvement of the technical solution, the waste liquid treatment unit comprises a liquid outlet pipe, a valve, a conveying pump C, an L-shaped pipe, a stirring evaporation crystallization kettle and a centrifuge, one end of the liquid outlet pipe is communicated with the bottom of the spray tower, the valve is arranged on the liquid outlet pipe, the other end of the liquid outlet pipe is communicated with the inlet of the conveying pump C, the outlet of the conveying pump C is communicated with the stirring evaporation crystallization kettle through the L-shaped pipe, and the bottom of the stirring evaporation crystallization kettle is communicated with the centrifuge through a pipeline F.

[0012] As a further improvement of the technical solution, the top of the spray tower is sequentially provided with a demister, a purification box and an exhaust pipeline; the demister is fixed to the top outlet of the spray tower, the purification box is provided with a honeycomb electrode plate, the inlet of the purification box is communicated with the outlet of the demister, and the outlet of the purification box is communicated with the exhaust pipeline.

[0013] As a further improvement of the technical solution, the control cabinet is electrically connected with the nitrogen generator, the nitrogen heater, the concentration sensor, the circulating pump, the conveying pump A, the conveying pump B, the conveying pump C, the liquid level sensor, the PH meter, the conductivity instrument, the stirring evaporation crystallization kettle and the centrifuge.

[0014] As a further improvement of the technical solution, the following steps are included: S1: adsorption stage: waste gas enters the treatment tank through the gas inlet connecting pipeline, and after the organic matter is adsorbed by the molecular sieve, the waste gas enters the spray tower through the pipeline C; S2: spraying stage: the circulating pump pumps the spraying liquid from the bottom of the tower to the atomizing nozzle for spraying, and the spraying liquid is in countercurrent contact with the waste gas for purification; the control cabinet controls the automatic supplement of lye and process water by the conveying pump A and the conveying pump B according to the data of the PH meter and the conductivity instrument; S3: desorption stage: when the detection value of the concentration sensor exceeds the standard or reaches the set time, the control cabinet starts the nitrogen generator and the nitrogen heater, and opens the electric valve A to blow high-temperature nitrogen to the molecular sieve for desorption; S4: condensation recovery stage: the desorbed high-concentration gas enters the serpentine coil cooling liquefaction through the pipeline B, the liquid is collected in the separation tank, and the incondensable gas is discharged from the exhaust port; S5: waste liquid treatment stage: when the liquid level sensor or the conductivity instrument reaches the high limit, the control cabinet starts the conveying pump C to send the waste liquid to the stirring evaporation crystallization kettle for concentration and crystallization, and the crystallization slurry enters the centrifuge for separation; S6: deep purification stage: the sprayed gas is demisted by the demister, ionized and oxidized by the honeycomb electrode plate, and finally discharged by the exhaust pipeline.

[0015] Compared with the prior art, the beneficial effects of the present application are: 1. In the waste battery extraction processing waste gas emission spraying filtering equipment, through the process combination of "molecular sieve adsorption + nitrogen desorption regeneration and condensation recovery", the high value volatile organic compound solvent is recycled and utilized, waste is turned into treasure, the operation cost is greatly reduced, and secondary pollution is avoided.

[0016] 2. In the waste battery extraction processing waste gas emission spraying filtering equipment, through the end treatment and waste liquid solidification technology of "spraying purification + evaporation crystallization", the acid gas is effectively neutralized, the spraying waste liquid is nearly zero emission, the complete pollution control closed loop is formed, and the environmental benefits are remarkable. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a whole structure schematic diagram of the application; Figure 2 It is a whole structure schematic diagram of the application; Figure 3 It is a whole structure schematic diagram of the application; Figure 4 It is a whole structure schematic diagram of the application; Figure 5 It is a whole structure schematic diagram of the application; Figure 6 It is a whole structure schematic diagram of the application; Figure 7 It is a whole structure schematic diagram of the application; Figure 8 It is a whole structure schematic diagram of the application; Figure 9 It is a whole structure schematic diagram of the application.

[0018] The meanings of various labels in the figure are: 1, processing tank; 11, gas inlet connecting pipe; 12, molecular sieve; 2, separation assembly; 21, nitrogen generator; 22, nitrogen heater; 23, pipe A; 24, distributor; 25, electric valve A; 3, cooling assembly; 31, pipe B; 32, electric valve B; 33, serpentine coil; 34, cooling box; 35, support frame; 36, separation tank; 361, scale; 362, exhaust port; 363, liquid discharge pipe; 364, connecting flange; 4, spraying assembly; 41, spraying tower; 42, pipe C; 43, concentration sensor; 44, fixed net; 45, plastic floating ball; 46, circulating pipe A; 47, circulating pump; 48, circulating pipe B; 49, atomizing nozzle; 410, liquid level sensor; 411, pH meter; 412, conductivity meter; 413, lye tank; 414, conveying pump A; 415, pipe D; 416, water tank; 417, conveying pump B; 418, pipe E; 419, liquid outlet pipe; 4191, valve; 420, conveying pump C; 421, L-shaped pipe; 422, stirring evaporation crystallization kettle; 423, centrifuge; 424, pipe F; 425, demister; 426, purification box; 427, honeycomb electrode plate; 428, exhaust pipe; 5, control cabinet. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0020] To this end, the present application provides a spraying and filtering equipment for waste gas emission based on waste battery extraction processing, as shown in Figures 1 to 9 which comprises a processing tank 1, the bottom of the processing tank 1 is communicated with a gas inlet connecting pipe 11, and the inside of the processing tank 1 is provided with a molecular sieve 12 for adsorbing organic matter; One side of the upper part of the processing tank 1 is communicated with a separation assembly 2, and the separation assembly 2 is used for desorption regeneration of the molecular sieve 12; The upper part of the processing tank 1 is communicated with a cooling assembly 3, and the cooling assembly 3 is used for cooling and liquefying the high-concentration gas generated by desorption; The other side of the upper part of the processing tank 1 is communicated with a spraying assembly 4, and the spraying assembly 4 is used for spraying and purifying the waste gas after preliminary adsorption.

[0021] In operation, the exhaust gas containing volatile organic compounds and acid gases passes from the bottom to the top of the molecular sieve 12 bed through the inlet connecting pipe 11, in the process, the volatile organic compound molecules are firmly adsorbed by the large specific surface and pore structure of the molecular sieve 12 through van der Waals force, thereby being removed from the gas stream, the gas purified by adsorption has a substantial reduction in main pollutants, and is subsequently discharged from the top of the treatment tank 1.

[0022] Further, referring to Figures 1 to 4 As shown, the separation assembly 2 includes a nitrogen generator 21, a nitrogen heater 22, a pipe A 23, a distributor 24, and an electric valve A 25, the outlet of the nitrogen generator 21 communicates with the inlet of the nitrogen heater 22, the outlet of the nitrogen heater 22 communicates with the distributor 24 through the pipe A 23, the distributor 24 is fixedly arranged above the inside of the treatment tank 1, and the electric valve A 25 is installed on the pipe A 23.

[0023] In operation, when the concentration sensor 43 at the outlet of the treatment tank 1 detects that the volatile organic compound concentration has penetrated, i.e., the adsorption is saturated, or when the preset desorption time is reached, the control cabinet 5 first closes the electric valve B 32, and then opens the electric valve A 25, the nitrogen generator 21, and the nitrogen heater 22, the high-purity inert nitrogen gas generated by the nitrogen generator 21 is heated to a high temperature of 200-300℃ by the nitrogen heater 22, the high-temperature nitrogen gas passes through the pipe A 23 and the distributor 24, and is uniformly blown into the molecular sieve 12 bed, the high temperature destroys the van der Waals force between the volatile organic compound molecules and the molecular sieve 12, causing the adsorbed volatile organic compounds to be desorbed and carried out of the treatment tank 1 by the high-temperature nitrogen gas, forming a high-concentration volatile organic compound mixed gas, and using inert nitrogen gas instead of air as the desorption medium can completely avoid the risk of explosion or coking of volatile organic compounds at high temperatures due to contact with oxygen.

[0024] Further, referring to Figures 1 to 4 As shown, the cooling assembly 3 includes a pipe B 31, an electric valve B 32, a serpentine coil 33, a cooling box 34, a support frame 35, and a separation tank 36, one end of the pipe B 31 communicates with the top of the treatment tank 1, the electric valve B 32 is installed on the pipe B 31, the other end of the pipe B 31 communicates with the inlet of the serpentine coil 33, the serpentine coil 33 is arranged inside the cooling box 34, the bottom of the cooling box 34 is fixedly connected with the support frame 35, the outlet of the serpentine coil 33 communicates with the inlet of the separation tank 36, the surface of the separation tank 36 is provided with a scale table 361, the top thereof is provided with a gas outlet 362, and the bottom thereof is communicated with a liquid discharge pipe 363 with a connecting flange 364.

[0025] During operation, the high-temperature, high-concentration mixture of volatile organic compounds and nitrogen from processing tank 1 enters the serpentine coil 33 through pipe B31. In the serpentine coil 33, the mixture undergoes sufficient heat exchange with the cooling medium outside the coil, causing the temperature to drop sharply below the dew point of the volatile organic compound components. This causes most of the volatile organic compound vapors to condense into liquid. After the gas-liquid mixture enters the separator 36, the liquid volatile organic compounds accumulate at the bottom of the tank due to gravity and can be periodically recovered through the drain pipe 363. The non-condensable gases, mainly nitrogen and a very small amount of uncondensed volatile organic compounds, are discharged from the exhaust port 362 at the top and can be returned to the upstream process or treated separately. The scale 361 is used to visually observe the liquid level and volume of the recovered solvent.

[0026] Among them, see Figures 5 to 9 As shown, the spray assembly 4 includes a spray tower 41. The bottom side of the spray tower 41 is connected to the top of the treatment tank 1 via a pipe C42. A concentration sensor 43 is installed on the pipe C42. A fixed mesh 44 is installed inside the spray tower 41, filled with plastic floats 45. The spray tower 41 also includes a circulation pump 47, circulation pipe A46, circulation pipe B48, and atomizing nozzles 49. One end of circulation pipe A46 is connected to the lower part of the spray tower 41, and the other end is connected to the inlet of the circulation pump 47. The outlet of the circulation pump 47 is connected to the atomizing nozzles 49 via circulation pipe B48. The atomizing nozzles 49 are fixed to the spray tower 41. The top of the inner cavity of the spray tower 41 is also equipped with a liquid level sensor 410, a pH meter 411, and a conductivity meter 412. It also includes an alkali dosing unit and a water replenishment unit. The alkali dosing unit includes an alkali tank 413, a transfer pump A414, and a pipe D415. The pipe D415 connects the outlet of the transfer pump A414 to the lower part of the spray tower 41. The inlet of the transfer pump A414 is connected to the alkali tank 413. The water replenishment unit includes a water tank 416, a transfer pump B417, and a pipe E418. The pipe E418 connects the outlet of the transfer pump B417 to the lower part of the spray tower 41. The inlet of the transfer pump B417 is connected to the water tank 416.

[0027] At work, After initial adsorption, the waste gas enters from the bottom of the spray tower 41 through pipe C42, passes upward through the packing layer of plastic float 45, and simultaneously, the circulating pump 47 pumps the spray liquid, usually an alkaline aqueous solution, from the bottom of the tower to the atomizing nozzle 49 at the top of the tower through the circulating pipe B48. The spray liquid is atomized into fine droplets and sprayed downward. The waste gas and alkaline droplets fully come into countercurrent contact in the packing layer, and residual acidic gases such as HF in the waste gas are neutralized by the alkaline solution. At the same time, some water-soluble organic matter is also absorbed. The plastic float 45 greatly increases the gas-liquid contact area and improves the mass transfer efficiency. The pH meter 411 monitors the acidity and alkalinity of the spray liquid in real time. When the pH value is lower than the set lower limit, the control cabinet 5 starts the transfer pump A414 to replenish the alkaline solution in the tower. The conductivity meter 412 monitors the salt content of the spray liquid, and the liquid level sensor 410 monitors the liquid level. When the liquid level is too low or the conductivity is too high, the control cabinet 5 will start the transfer pump B417 to replenish fresh process water or start the subsequent drainage procedure.

[0028] Among them, see Figures 6 to 8 As shown, it also includes a waste liquid treatment unit, which includes an outlet pipe 419, a valve 4191, a transfer pump C420, an L-shaped pipe 421, a stirred evaporation crystallizer 422, and a centrifuge 423. One end of the outlet pipe 419 is connected to the bottom of the spray tower 41, and a valve 4191 is installed on the outlet pipe 419. The other end is connected to the inlet of the transfer pump C420. The outlet of the transfer pump C420 is connected to the stirred evaporation crystallizer 422 through the L-shaped pipe 421. The bottom of the stirred evaporation crystallizer 422 is connected to the centrifuge 423 through the pipe F424.

[0029] During operation, when the salt concentration in the spray liquid increases due to the continuous neutralization of acidic gases, as determined by the conductivity meter 412, the controller inside the control cabinet 5 will open the valve 4191 and start the transfer pump C420 to transport part of the high-salt waste liquid to the stirred evaporation crystallizer 422. In the evaporation crystallizer, water is removed by heating and evaporation, causing the dissolved salts such as sodium fluoride and sodium chloride to become supersaturated and crystallize. The resulting crystallized slurry is discharged into the centrifuge 423 through the pipeline F424 for solid-liquid separation. The precipitated salt crystals are packaged and disposed of as solid waste, while the separated mother liquor can be returned to the evaporation crystallizer for further evaporation. This process achieves maximum reduction of wastewater volume and solidification of pollutants.

[0030] Among them, see Figure 6 As shown, a demister 425, a purification box 426, and an exhaust pipe 428 are sequentially arranged on the top of the spray tower 41. The demister 425 is fixed to the top outlet of the spray tower 41. A honeycomb electrode plate 427 is arranged inside the purification box 426. Its inlet is connected to the outlet of the demister 425, and its outlet is connected to the exhaust pipe 428.

[0031] During operation, the wet exhaust gas, after being purified by spraying, first passes through a demister 425, such as a wire mesh demister, to remove the tiny droplets entrained in it, preventing the spraying liquid from being carried away. Subsequently, the gas enters the purification box 426, where the honeycomb electrode plate 427 generates low-temperature plasma under high voltage. These high-energy electrons, ions, free radicals, and other active particles can effectively oxidize and decompose the residual and incompletely removed trace amounts of volatile organic compound molecules in the exhaust gas into harmless CO2 and H2O, thereby performing the final deep purification of the exhaust gas and ensuring that the gas discharged from the exhaust pipe 428 fully meets the strict environmental emission standards.

[0032] Among them, see Figures 1 to 9 As shown, it also includes a control cabinet 5, which is electrically connected to a nitrogen generator 21, a nitrogen heater 22, a concentration sensor 43, a circulating pump 47, a transfer pump A414, a transfer pump B417, a transfer pump C420, a liquid level sensor 410, a pH meter 411, a conductivity meter 412, a stirred evaporation crystallizer 422, and a centrifuge 423.

[0033] In summary, this invention effectively solves the technical problems of incomplete treatment of waste gas from waste battery extraction, high cost, and easy generation of secondary pollution in existing technologies by coupling multiple technologies and automating them.

[0034] Working principle: The device is a set of adsorption concentration, desorption regeneration, condensation recovery, chemical washing, deep purification and solidification of waste liquid in one of the intelligent waste gas treatment system, its complete working process based on the core of hierarchical processing, resource recycling, intelligent control, forming a continuous closed loop process, the whole process begins with the mixed waste gas generated by the extraction process of waste batteries, the waste gas is introduced into the device through the inlet connecting pipeline 11, the core of the device is the treatment tank 1, the waste gas passes through the adsorption bed filled with hydrophobic molecular sieve 12 from bottom to top, in the first checkpoint, volatile organic compounds in the waste gas are captured by the molecular sieve 12 with large specific surface area and uniform pore through physical adsorption principle, thereby separated from the gas phase, this step is mainly aimed at the high concentration of volatile organic compounds with recycling value, after the preliminary purification of molecular sieve 12, the volatile organic compounds content of the gas is greatly reduced, then it is transported to the spray assembly 4 through pipeline C42, in the spray tower 41 of the spray assembly 4, the waste gas is treated again, the circulating pump 47 transports the alkaline spray liquid at the bottom to the atomizing nozzle 49 at the top, which is uniformly atomized, the waste gas and the alkali droplets are countercurrently contacted in the filler layer filled with plastic floating ball 45, and the gas-liquid mass transfer is fully carried out, in this process, the residual acid gas (such as HF) in the waste gas reacts with the alkali to generate harmless salt, at the same time, part of the water-soluble organic matter is also absorbed, the PH meter 411 and the conductivity instrument 412 monitor the state of the spray liquid in real time, and the control cabinet 5 automatically controls the delivery pump A 414 and the delivery pump B 417 to supplement the alkali and process water into the tower to maintain the best purification efficiency and water balance, when the concentration sensor 43 at the outlet of the treatment tank 1 detects that the concentration of volatile organic compounds increases (indicating that the molecular sieve 12 is saturated) or reaches the preset time, the control cabinet 5 will automatically start the separation assembly 2, enter the desorption regeneration and resource recovery stage, at this time, the path to the spray tower 41 is kept, the electric valve A 25 is opened, and the electric valve B 32 is closed, the high-purity inert nitrogen gas generated by the nitrogen generator 21 is heated to 200-300℃ by the nitrogen heater 22, this high-temperature nitrogen gas serves as an energy carrier and carrier gas, which uniformly sweeps the molecular sieve 12 bed through pipeline A 23 and distributor 24, the injection of heat energy destroys the van der waals force between the volatile organic compounds molecules and the molecular sieve 12, so that the adsorbed volatile organic compounds are desorbed, forming a high-concentration, high-temperature mixed gas of volatile organic compounds and nitrogen, this gas stream rich in volatile organic compounds enters the cooling assembly 3 immediately, it enters the serpentine coil 33 immersed in the cooling tank 34 through pipeline B 31, in the serpentine coil 33, the mixed gas exchanges heat with the cooling medium (such as circulating cooling water or chilled water) outside the pipe, the temperature drops rapidly below the dew point of the volatile organic compounds components, based on the heat transfer condensation principle, the gaseous volatile organic compounds are liquefied, then enter the separation tank 36 together with the incondensable gas (mainly nitrogen),In the separation tank 36, liquid volatile organic compounds are collected at the bottom due to gravity and can be recycled periodically through the liquid outlet 363, realizing the recycling of resources, and non-condensable gases are discharged from the gas outlet 362. The gas after wet purification in the spray tower 41 will carry a small amount of mist droplets. Therefore, the gas is first passed through the mist eliminator 425 at the top of the tower before being discharged, which removes these liquid droplets through the principle of mechanical interception to prevent liquid entrainment. Subsequently, the gas enters the purification box 426 at the end, and the honeycomb electrode plate 427 installed in the box generates low-temperature plasma rich in active particles such as high-energy electrons, ions, and free radicals under the action of high voltage. These active particles can bombard and break the molecular chains of trace amounts of volatile organic compounds remaining in the waste gas, and ultimately degrade them into harmless carbon dioxide and water through chemical oxidation principle, ensuring that the gas discharged through the exhaust pipe 428 is stable and meets the standards. For the salt-containing waste liquid generated during the operation of the spray tower 41, the system realizes solidification treatment through the waste liquid treatment unit. When the salt concentration of the spray liquid is too high, the control cabinet 5 will start the delivery pump C420 to deliver the waste liquid to the stirred evaporation crystallization kettle 422. In this kettle, water is removed by heating and evaporation, and soluble salts are crystallized and separated due to supersaturation, realizing phase separation. The crystallization slurry produced is then mechanically separated by the centrifuge 423, and the separated salt crystals are properly disposed as solid waste, thereby realizing near-zero discharge of waste liquid. The entire process, from adsorption, spraying, desorption, condensation recovery to waste liquid treatment, is monitored and controlled by the control cabinet 5 to ensure orderly, coordinated and efficient operation of each unit, ultimately achieving high-standard purification of waste gas, recovery of valuable components, solidification of waste liquid and long-period automatic stable operation of the entire system.

[0035] It should be noted that, in the present document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0036] While the embodiments of the application have been illustrated and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and alterations can be made therein without departing from the spirit and scope of the application, which is defined by the following claims and their equivalents.

Claims

1. A spray filtration device for waste gas emissions from waste battery extraction and processing, characterized in that: Including processing tank (1), the bottom of processing tank (1) is communicated with air inlet connecting pipeline (11), the inside of processing tank (1) is provided with molecular sieve (12) for adsorbing organic matter; One side of the upper portion of processing tank (1) is communicated with separation assembly (2), and separation assembly (2) is used for desorption regeneration of molecular sieve (12); The upper portion of processing tank (1) is communicated with cooling assembly (3), and cooling assembly (3) is used for cooling and liquefying high concentration gas generated by desorption; The other side of the upper portion of processing tank (1) is communicated with spraying assembly (4), and spraying assembly (4) is used for spraying and purifying waste gas after preliminary adsorption.

2. The waste gas emission spraying and filtering equipment based on the extraction processing of waste old batteries according to claim 1, characterized in that: The separation assembly (2) includes nitrogen generator (21), nitrogen heater (22), pipeline A (23), distributor (24) and electric valve A (25), the outlet of nitrogen generator (21) is communicated with the inlet of nitrogen heater (22), the outlet of nitrogen heater (22) is communicated with distributor (24) through pipeline A (23), distributor (24) is fixedly arranged above the inside of processing tank (1), and electric valve A (25) is installed on pipeline A (23).

3. The waste gas emission spraying and filtering equipment based on the extraction processing of waste old batteries according to claim 2, characterized in that: The cooling assembly (3) includes pipeline B (31), electric valve B (32), serpentine coil pipe (33), cooling box (34), support frame (35) and separation tank (36), one end of pipeline B (31) is communicated with the top of processing tank (1), electric valve B (32) is installed on pipeline B (31), the other end of pipeline B (31) is communicated with the inlet of serpentine coil pipe (33), serpentine coil pipe (33) is arranged in the inside of cooling box (34), support frame (35) is fixedly connected to the bottom of cooling box (34), the outlet of serpentine coil pipe (33) is communicated with the inlet of separation tank (36), the surface of separation tank (36) is provided with scale table (361), the top of separation tank (36) is provided with exhaust port (362), and the bottom of separation tank (36) is communicated with liquid discharge pipe (363) with connecting flange (364).

4. The waste gas emission spraying and filtering equipment based on the extraction processing of waste old batteries according to claim 3, characterized in that: The spraying assembly (4) includes spraying tower (41), one side of the bottom of spraying tower (41) is communicated with the top of processing tank (1) through pipeline C (42), concentration sensor (43) is arranged on pipeline C (42), fixed net (44) is arranged in the inside of spraying tower (41), and plastic floating ball (45) is filled in fixed net (44).

5. The waste gas emission spraying and filtering equipment based on the extraction processing of waste old batteries according to claim 4, characterized in that: The spray tower (41) is further provided with a circulating pump (47), a circulating pipeline A (46), a circulating pipeline B (48) and an atomizing nozzle (49), one end of the circulating pipeline A (46) is communicated with the lower part of the spray tower (41), the other end is communicated with the inlet of the circulating pump (47), the outlet of the circulating pump (47) is communicated with the atomizing nozzle (49) through the circulating pipeline B (48), the atomizing nozzle (49) is fixed on the top of the inner cavity of the spray tower (41), and the spray tower (41) is further provided with a liquid level sensor (410), a PH meter (411) and a conductivity meter (412).

6. The waste gas emission spraying and filtering equipment based on the extraction processing of waste old batteries according to claim 5, characterized in that: Further comprising a lye dosing unit and a water supplementing unit, the lye dosing unit comprises a lye tank (413), a conveying pump A (414) and a pipeline D (415), the pipeline D (415) is communicated between the outlet of the conveying pump A (414) and the lower part of the spray tower (41), the inlet of the conveying pump A (414) is communicated with the lye tank (413), the water supplementing unit comprises a water tank (416), a conveying pump B (417) and a pipeline E (418), the pipeline E (418) is communicated between the outlet of the conveying pump B (417) and the lower part of the spray tower (41), and the inlet of the conveying pump B (417) is communicated with the water tank (416).

7. The waste battery extraction processing waste gas emission spraying and filtering equipment according to claim 6, characterized in that: Further comprising a waste liquid treatment unit, the waste liquid treatment unit comprises a liquid outlet pipe (419), a valve (4191), a conveying pump C (420), an L-shaped pipe (421), a stirring evaporation crystallization kettle (422) and a centrifuge (423), one end of the liquid outlet pipe (419) is communicated with the bottom of the spray tower (41), the valve (4191) is arranged on the liquid outlet pipe (419), the other end is communicated with the inlet of the conveying pump C (420), the outlet of the conveying pump C (420) is communicated with the stirring evaporation crystallization kettle (422) through the L-shaped pipe (421), and the bottom of the stirring evaporation crystallization kettle (422) is communicated with the centrifuge (423) through a pipeline F (424).

8. The waste battery extraction processing waste gas emission spraying and filtering equipment according to claim 7, characterized in that: The top of the spray tower (41) is sequentially provided with a demister (425), a purification box (426) and an exhaust pipeline (428), the demister (425) is fixed on the top outlet of the spray tower (41), the purification box (426) is provided with a honeycomb electrode plate (427), the inlet of the purification box (426) is communicated with the outlet of the demister (425), and the outlet of the purification box (426) is communicated with the exhaust pipeline (428).

9. The waste battery extraction processing waste gas emission spraying and filtering equipment according to claim 5, characterized in that: Further comprising a control cabinet (5), the control cabinet (5) is electrically connected with the nitrogen generator (21), the nitrogen heater (22), the concentration sensor (43), the circulating pump (47), the conveying pump A (414), the conveying pump B (417), the conveying pump C (420), the liquid level sensor (410), the PH meter (411), the conductivity meter (412), the stirring evaporation crystallization kettle (422) and the centrifuge (423).

10. The waste gas emission spraying and filtering equipment based on the extraction processing of waste and old batteries, characterized in that: The control method of the waste gas emission spraying and filtering equipment for waste battery extraction processing is mainly applicable to the waste gas emission spraying and filtering equipment based on waste battery extraction processing as described in claims 1-9, and includes the following steps: S1: adsorption stage: the waste gas enters the treatment tank (1) through the gas inlet connecting pipeline (11), and after the organic matter is adsorbed by the molecular sieve (12), it enters the spraying tower (41) through the pipeline C (42); S2: spraying stage: the circulating pump (47) pumps the spraying liquid from the bottom of the tower to the atomizing nozzle (49) for spraying, and the waste gas is countercurrently contacted and purified; the control cabinet (5) controls the delivery pump A (414) and the delivery pump B (417) to automatically supplement the lye and the process water according to the data of the PH meter (411) and the conductivity instrument (412); S3: desorption stage: when the concentration sensor (43) detects that the value exceeds the standard or reaches the set time, the control cabinet (5) starts the nitrogen generator (21) and the nitrogen heater (22), and opens the electric valve A (25), and the high-temperature nitrogen gas blows off the molecular sieve (12) for desorption; S4: condensation recovery stage: the desorbed high-concentration gas enters the serpentine coil (33) to be cooled and liquefied, and the liquid is collected in the separation tank (36), and the incondensable gas is discharged from the exhaust port (362); S5: waste liquid treatment stage: when the liquid level sensor (410) or the conductivity instrument (412) reaches the upper limit, the control cabinet (5) starts the delivery pump C (420) to send the waste liquid to the stirring evaporation crystallization kettle (422) for concentration and crystallization, and the crystallization slurry enters the centrifuge (423) for separation; S6: deep purification stage: the sprayed gas passes through the demister (425) for demisting, then passes through the honeycomb electrode plate (427) for ionization and oxidation, and finally is discharged through the exhaust pipeline (428) to meet the emission standard.

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