WO2024082652A1 - Tail gas treatment system in crushing and sorting process of scrapped power lithium battery - Google Patents

Tail gas treatment system in crushing and sorting process of scrapped power lithium battery Download PDF

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Publication number
WO2024082652A1
WO2024082652A1 PCT/CN2023/099082 CN2023099082W WO2024082652A1 WO 2024082652 A1 WO2024082652 A1 WO 2024082652A1 CN 2023099082 W CN2023099082 W CN 2023099082W WO 2024082652 A1 WO2024082652 A1 WO 2024082652A1
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WIPO (PCT)
Prior art keywords
exhaust gas
pipeline
bag
cooling tower
cooling
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PCT/CN2023/099082
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French (fr)
Chinese (zh)
Inventor
黄庆
苑文仪
陆炎
汤之杰
滕诚尧
陈云燕
郭艺璠
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上海第二工业大学
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Publication of WO2024082652A1 publication Critical patent/WO2024082652A1/en

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D50/00Combinations of methods or devices for separating particles from gases or vapours
    • B01D50/60Combinations of devices covered by groups B01D46/00 and B01D47/00
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/02Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
    • B01D53/06Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with moving adsorbents, e.g. rotating beds
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/26Drying gases or vapours
    • B01D53/265Drying gases or vapours by refrigeration (condensation)
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/38Removing components of undefined structure
    • B01D53/40Acidic components
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/74General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/75Multi-step processes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/74General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/77Liquid phase processes
    • B01D53/78Liquid phase processes with gas-liquid contact
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/74General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/81Solid phase processes
    • B01D53/83Solid phase processes with moving reactants
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2251/00Reactants
    • B01D2251/40Alkaline earth metal or magnesium compounds
    • B01D2251/404Alkaline earth metal or magnesium compounds of calcium
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2251/00Reactants
    • B01D2251/60Inorganic bases or salts
    • B01D2251/604Hydroxides
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2253/00Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/10Inorganic adsorbents
    • B01D2253/102Carbon
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2257/00Components to be removed
    • B01D2257/60Heavy metals or heavy metal compounds
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2257/00Components to be removed
    • B01D2257/70Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
    • B01D2257/704Solvents not covered by groups B01D2257/702 - B01D2257/7027
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00Technologies for solid waste management
    • Y02W30/50Reuse, recycling or recovery technologies
    • Y02W30/84Recycling of batteries or fuel cells

Definitions

  • the utility model relates to the technical field of environmental protection and waste gas treatment, in particular to a tail gas treatment system in the process of crushing and sorting scrapped power lithium batteries.
  • Lithium-ion batteries are mainly composed of positive electrode materials, negative electrode materials, separators, binders, conductive agents, etc.
  • the positive electrode materials mainly include lithium cobalt oxide, lithium manganese oxide, lithium iron phosphate and nickel-cobalt-manganese ternary materials or nickel-cobalt-aluminum ternary materials. Cobalt and lithium, as a rare metal element, have high recovery value.
  • the recycling methods for retired or scrapped power lithium batteries include dry recycling, wet recycling and biological recycling. Regardless of the method, the battery must be disassembled, the monomers must be crushed, and the sorting must be pre-treated. During the pretreatment process, the electrolyte in the battery will evaporate and overflow.
  • the main components of lithium battery electrolytes include solvents such as ethylene carbonate, ethyl methyl carbonate, propylene carbonate, dimethyl carbonate, etc., and solutes such as LiPF 6.
  • solvents such as ethylene carbonate, ethyl methyl carbonate, propylene carbonate, dimethyl carbonate, etc.
  • solutes such as LiPF 6.
  • LiPF 6 When carbonate substances enter the gas, the VOCs in the gas will exceed the standard, and LiPF 6 will hydrolyze when it comes into contact with water to generate acidic substances such as hydrogen fluoride and phosphoric acid, which seriously pollute the environment. Therefore, in the process of recycling scrapped power lithium batteries, the exhaust gas must be treated in an environmentally friendly manner.
  • phosphoric acid and hydrofluoric acid are two Phosphoric acid and hydrofluoric acid are very valuable chemical raw materials. my country has to mine large quantities of them every year to produce phosphoric acid and hydrofluoric acid, which not only wastes resources but also damages the environment.
  • Lithium battery pole piece recycling and processing equipment can effectively crush and grind waste power battery pole pieces, greatly improving the powder removal rate, which is higher than 98%; the whole process realizes PLC automatic control and exhaust gas collection and treatment, effectively reducing the emission of dust and electrolyte, and realizing the environmentally friendly separation and recycling of various components of waste power battery pole pieces, greatly reducing personnel operation risks and environmental pollution; this method can significantly improve production capacity and easily realize industrial-grade mass production.
  • the first is to use batteries with a capacity less than 70%-80% of the original capacity in a cascade manner. These batteries can no longer meet the requirements of automobile use, but their remaining capacity can still be used in other places, such as home lighting, energy storage, as a power source, etc.; the second is to dismantle and recycle batteries with a capacity reduced to 50% or unusable.
  • the power battery module needs to be disassembled for subsequent resource recovery and reuse. At the same time, the process will generate corresponding exhaust gas, which needs to be safely, efficiently and environmentally friendly to meet the standards before it can be discharged to reduce pollution to the environment.
  • the purpose of the utility model is to provide an exhaust gas treatment system in the process of crushing and sorting scrapped power lithium batteries, so as to solve the problems existing in the above-mentioned prior art, and to realize the collection of black powder mixed in the exhaust gas, to efficiently, safely and environmentally treat the exhaust gas, and to reduce the pollution caused to the environment.
  • the utility model provides an exhaust gas treatment system in the process of crushing and sorting scrapped power lithium batteries, including: a process water tank; the process water tank is used to store process water;
  • Cooling tower the process water tank supplies water to the cooling tower; the cooling tower is used to cool the exhaust gas and humidify and settle a small amount of black powder mixed in the exhaust gas;
  • Bag dust collector the bag dust collector is used to carry out bag dust removal on the tail gas transported by the cooling tower;
  • Filter bag dust removal device the filter bag dust removal device is fixedly installed on the top of the bag dust collector;
  • wet scrubber is connected to the bag filter through an exhaust gas heat exchanger; the wet scrubber is used to cool down and remove the high-temperature exhaust gas in the bag filter.
  • Wet absorption of acid gases is used to cool down and remove the high-temperature exhaust gas in the bag filter.
  • Activated carbon adsorption tower used for adsorbing and filtering the exhaust gas discharged from the exhaust gas heating exchanger and discharging the gas to the outside through the chimney.
  • the process water tank is connected with a drainage pipe, a water supply pipe and a water outlet pipe; one end of the drainage pipe is connected to the side above the water level line of the process water tank; the other end of the drainage pipe is connected to the external drainage pipe; the water supply pipe connects the top of the process water tank with the industrial water pool; one end of the water outlet pipe is connected to the bottom of the process water tank, and a cooling water pump is installed at the other end of the water outlet pipe; the cooling water pump is connected to the cooling tower through a cooling water outlet door.
  • the cooling tower is connected with a cooling tower tail gas delivery pipeline, a cooling tower cooling water delivery pipeline, a cooling tower compressed air delivery pipeline, a cooling tower tail gas output pipeline and a black powder output pipeline;
  • the cooling tower tail gas delivery pipeline is placed at one end of the top of the cooling tower to introduce the tail gas into the cooling tower; one end of the cooling tower cooling water delivery pipeline is fixedly connected to the cooling water outlet door, and the other end is connected to the top of the cooling tower;
  • the cooling tower compressed air delivery pipeline connects the top surface of the cooling tower with a compressed air source;
  • the cooling tower tail gas output pipeline is installed on the bottom side wall of the cooling tower, and the cooling tower tail gas output pipeline forms an angle of 60°-62° with the cooling tower side wall;
  • the black powder output pipeline is installed on the bottom surface of the cooling tower through a cooling tower rotary valve;
  • the temperature in the cooling tower tail gas output pipeline is maintained at 150°C-155°C.
  • a cooling tower heater is also fixedly installed at the bottom of the cooling tower; and a cooling tower rotating scraper is also installed at the bottom of the inner cavity of the cooling tower.
  • the bag dust collector is connected to a bag dust collector tail gas delivery pipeline, a bag dust collector tail gas output pipeline, a bag dust collector compressed air delivery pipeline and a bag dust collector dust residue output pipe.
  • One end of the bag filter exhaust gas delivery pipeline is connected to the cooling tower exhaust gas output pipeline, and the other end is connected to the middle of the bag filter, and the bag filter exhaust gas delivery pipeline is directly facing the filter bag in the bag filter;
  • the bag filter exhaust gas delivery pipeline is also provided with a dry powder addition port for adding slaked lime powder and activated carbon powder;
  • One end of the bag-type dust collector exhaust gas output pipe is connected to one side of the top of the bag-type dust collector; a bag outlet baffle is installed at the other end of the bag-type dust collector exhaust gas output pipe; compressed air is introduced into the compressed air delivery pipe of the bag-type dust collector; the compressed air is also introduced into the filter bag dust removal device through the purging compressed air delivery pipe; the dust residue output pipe of the bag-type dust collector is installed at the bottom of the bag-type dust collector.
  • a bag dust bin baffle is also installed on the top of the inner cavity of the bag dust collector; a vibration compressed air device is arranged under the filter bag; the bag dust collector exhaust gas delivery pipeline and the bag dust collector exhaust gas output pipeline are also directly connected through a bag heater and a heating fan to ensure that the exhaust gas temperature is maintained above 155°C; the bag heater is also introduced with purge air.
  • the filter bag dust removal device includes a pulse air bag and an air blowing pipe; the purge compressed air delivery pipeline is connected to the top of the pulse air bag; a plurality of air blowing pipes are installed at the bottom of the pulse air bag; the air blowing pipe extends into the bag dust collector and is arranged directly opposite to the filter bag; and a plurality of air blowing control valves are installed on the air blowing pipe.
  • the exhaust gas heating exchanger is connected with an exhaust gas heating input pipeline, an exhaust gas heating output pipeline, an exhaust gas heating exchanger exhaust gas output pipeline, an exhaust gas cooling input pipeline and an exhaust gas cooling output pipeline; one end of the exhaust gas cooling input pipeline is installed on the bag outlet baffle, and the other end of the exhaust gas cooling input pipeline is connected to the bottom of the exhaust gas heating exchanger; one end of the exhaust gas cooling output pipeline is connected to the bottom of the exhaust gas heating exchanger, and the exhaust gas cooling output pipeline is connected to the bottom of the exhaust gas heating exchanger.
  • the other end of the pipeline is connected to the bottom of the wet scrubber; the exhaust gas heating input pipeline is connected to the top of the wet scrubber; the exhaust gas heating output pipeline is connected to the exhaust gas output pipeline of the exhaust gas heating exchanger and the purge air heater respectively; the exhaust gas output pipeline of the exhaust gas heating exchanger is connected to the activated carbon adsorption tower.
  • the wet scrubber is connected to the exhaust gas cooling output pipeline through the wet scrubber exhaust gas output pipeline; and a wet scrubber inlet baffle is also installed on the wet scrubber exhaust gas output pipeline; the top of the wet scrubber is connected to the exhaust gas heating input pipeline through the wet scrubber exhaust gas input pipeline; the top of the wet scrubber is also connected to the dehumidification water delivery pipeline; a dehumidification water discharge pipeline is arranged below the dehumidification water delivery pipeline; a cooling water delivery pipeline is arranged below the dehumidification water discharge pipeline; a secondary dehumidification water delivery pipeline is connected to the middle part of the wet scrubber; the bottom of the wet scrubber is also connected to a cooling water pH meter input pipeline and a salinity meter input water pipeline; the bottom of the wet scrubber is also equipped with a cooling water output port and a cooling water drain gate.
  • the activated carbon adsorption tower is connected to the exhaust gas output pipeline of the exhaust gas heating exchanger through the hot air purge pipeline and the activated carbon adsorption tower exhaust gas inlet pipeline; the activated carbon adsorption tower is connected to the chimney through the activated carbon adsorption tower exhaust gas output pipeline and the induced draft fan.
  • the utility model discloses the following technical effects: the system adopts dry method to treat exhaust gas and is easy to maintain; the design of cooling tower is compact and optimized; the system has good controllability for load changes; the overall pressure difference is very low, which can save the power of induced draft fan; the system has high integration and is easy to operate.
  • FIG1 is a schematic diagram of the structure of the utility model system
  • FIG2 is a schematic diagram of the structure of the process water tank of the utility model system
  • FIG3 is a schematic diagram of the internal structure of a cooling tower of the utility model system
  • FIG4 is a schematic diagram of the structure of a bag filter system of the utility model
  • FIG5 is a schematic diagram of the structure of a wet scrubber of the utility model system
  • Figure 6 is a schematic diagram of the structure of the activated carbon of the utility model system.
  • 1-process water tank 101-drainage pipeline, 102-water supply pipeline, 103-water outlet pipeline, 104-external pipeline, 105-cooling water pump, 106-cooling water outlet door, 2-cooling tower, 201-cooling tower tail gas delivery pipeline, 202-cooling tower cooling water delivery pipeline, 203-cooling tower compressed air delivery pipeline, 204-cooling tower heater, 205-cooling tower tail gas output pipeline, 206-cooling tower rotary valve, 207-black powder output pipeline, 208-cooling tower rotary scraper, 3-bag dust collector, 301-bag dust collector tail gas delivery pipeline, 302-filter bag, 303-bag dust collector tail gas output pipeline, 3 04-bag outlet baffle, 305-bag dust collector bin baffle, 306-vibrating compressed air device, 307-bag heater, 308-bag dust collector compressed air delivery pipeline, 309-bag dust collector dust output pipeline, 310-purge compressed
  • the utility model provides an exhaust gas treatment system in the process of crushing and sorting scrapped power lithium batteries, comprising: a process water tank 1; the process water tank 1 is used to store process water;
  • Cooling tower 2 process water tank 1 supplies water to cooling tower 2; cooling tower 2 is used to cool the exhaust gas and humidify and settle the black powder in the exhaust gas;
  • Bag dust collector 3 bag dust collector 3 is used to carry out bag dust removal on the exhaust gas transported by cooling tower 2;
  • the filter bag dust removal device 6 is fixedly mounted on the top of the bag dust collector 3;
  • wet scrubber 4 is connected to the bag filter 3 through the exhaust gas heating exchanger 7; the wet scrubber 4 is used to cool and dehumidify the high-temperature exhaust gas in the bag filter 3;
  • the activated carbon adsorption tower 5 is used to adsorb and filter the exhaust gas discharged from the exhaust gas heating exchanger 7 and discharge the gas to the outside through the chimney 9.
  • a process water tank 1 is used to store process water and supply water to a cooling tower and a wet scrubber;
  • Cooling tower 2 which is used to cool the exhaust gas and humidify the black powder in the exhaust gas to make it settle and facilitate collection;
  • the bag filter 3 is used to remove dust from the slaked lime and activated carbon added in the dry exhaust gas treatment, forming a filter cake composed of slaked lime and activated carbon on the bag to strengthen the chemical reaction of the exhaust gas;
  • the filter bag dust removal device 6 is used to clean the filter cake on the bag and remove dust from the bag when the pressure difference on both sides of the bag reaches a trigger value;
  • Wet scrubber 4 which is used to cool the tail gas to 60°C-70°C, reduce the absorption saturation, and absorb acidic gases;
  • the tail gas heating exchanger 7 is used to heat the tail gas after being cooled in the wet scrubber to about 135°C to reduce the consumption of water vapor;
  • An activated carbon adsorption tower 5 which is used to adsorb and filter the tail gas
  • the bag heater 8 is used to keep the exhaust gas temperature at a high temperature (above 155° C.) to ensure that there is no corrosion problem caused by condensed water.
  • the exhaust gas inlet temperature of the cooling tower 2 is maintained at about 200°C, and the outlet temperature is about 155°C; the bag filter 3 is about 155-150°C during the entire treatment process; the temperature between the bag filter 3 and the inlet of the exhaust gas heating exchanger 7 is about 150°C, the exhaust gas heating exchanger 7 heats the outlet to 97-103°C, the wet scrubber 4 inlet is 97-103°C, and the outlet is 45-62°C; the exhaust gas heating exchanger 7 is heated at the inlet to 45-62°C, and the outlet is about 135°C.
  • the process water tank 1 is connected with a drainage pipe 101, a water supply pipe 102 and a water outlet pipe 103; one end of the drainage pipe 101 is connected to the side above the water level line of the process water tank 1; the other end of the drainage pipe 101 is connected with an external drainage pipe 104; the water supply pipe 102 connects the top of the process water tank 1 with the industrial water pool; one end of the water outlet pipe 103 is connected with the bottom of the process water tank 1, and a cooling water pump 105 is installed at the other end of the water outlet pipe 103; the cooling water pump 105 is connected with the cooling tower 2 through a cooling water outlet door 106.
  • the cooling tower 2 is connected with a cooling tower tail gas delivery pipeline 201, a cooling tower cooling water delivery pipeline 202, a cooling tower compressed air delivery pipeline 203, a cooling tower tail gas output pipeline 205 and a black powder output pipeline 207;
  • the cooling tower tail gas delivery pipeline 201 is placed at one end of the top of the cooling tower 2 to introduce the tail gas into the cooling tower 2;
  • one end of the cooling tower cooling water delivery pipeline 202 is fixedly connected to the cooling water outlet door 106, and the other end is connected to the top of the cooling tower 2;
  • the cooling tower compressed air delivery pipeline 203 connects the top surface of the cooling tower 2 with the compressed air source;
  • the cooling tower tail gas output pipeline 205 is installed on the bottom side wall of the cooling tower, and the cooling tower tail gas output pipeline 205 forms an angle of 60°-62° with the side wall of the cooling tower 2;
  • the black powder output pipeline 207 is installed on the bottom surface of the cooling tower 2 through the cooling tower rotary valve 206;
  • the temperature in the cooling tower tail gas output pipe 205 is maintained at 150°C-155°C.
  • a cooling tower heater 204 is also fixedly installed at the bottom of the cooling tower 2; a cooling tower rotating scraper 208 is also installed at the bottom of the inner cavity of the cooling tower 2.
  • the bag-type dust collector 3 is connected with a bag-type dust collector tail gas delivery pipeline 301, a bag-type dust collector tail gas output pipeline 303, a bag-type dust collector compressed air delivery pipeline 308 and a bag-type dust collector dust residue output pipeline 309; one end of the bag-type dust collector tail gas delivery pipeline 301 is connected with the cooling tower tail gas output pipeline 205, and the other end is connected with the middle of the bag-type dust collector 3, and the bag-type dust collector tail gas delivery pipeline 301 is directly opposite to the filter bag 302 in the bag-type dust collector 3; the bag-type dust collector tail gas delivery pipeline 301 is also provided with a dry powder addition port for adding slaked lime powder 313 and activated carbon powder 314;
  • One end of the bag-type dust collector exhaust gas output pipe 303 is connected to one side of the top of the bag-type dust collector 3; the other end of the bag-type dust collector exhaust gas output pipe 303 is installed with a bag outlet baffle 304; compressed air 311 is introduced into the bag-type dust collector compressed air delivery pipe 308; compressed air 311 is also introduced into the filter bag dust removal device 6 through the purge compressed air delivery pipe 310; the bag-type dust residue output pipe 309 is installed at the bottom of the bag-type dust collector 3.
  • a bag dust bin baffle 305 is also installed on the top of the inner cavity of the bag dust collector 3; a vibration compressed air device 306 is arranged under the filter bag 302; the bag dust collector exhaust gas delivery pipeline 301 and the bag dust collector exhaust gas output pipeline 303 are also directly connected through the bag dust collector heater 307 and the heating fan to ensure that the exhaust gas temperature is maintained above 155°C; the bag dust collector 307 is also introduced with purge air 312.
  • the vibrating compressed air device 306 is an existing device, which provides power through compressed air to make the piston move up and down to vibrate the filter bag 302 to shake off the dust.
  • the filter bag dust removal device 6 includes a pulse air bag 601 and an air blowing pipe 602; the purge compressed air delivery pipeline 310 is connected to the top of the pulse air bag 601; a plurality of air blowing pipes 602 are installed at the bottom of the pulse air bag 601; the air blowing pipe 602 extends into the bag dust collector 3 and is arranged directly opposite the filter bag 302; and a plurality of air blowing control valves 603 are installed on the air blowing pipe 602.
  • the exhaust gas heating exchanger 7 is connected with an exhaust gas heating input pipeline 701, an exhaust gas heating output pipeline 702, an exhaust gas heating exchanger exhaust gas output pipeline 703, an exhaust gas cooling input pipeline 704 and an exhaust gas cooling output pipeline 705; one end of the exhaust gas cooling input pipeline 704 is installed on the bag outlet baffle 304, and the other end of the exhaust gas cooling input pipeline 704 is connected to the bottom of the exhaust gas heating exchanger 7; one end of the exhaust gas cooling output pipeline 705 is connected to the bottom of the exhaust gas heating exchanger 7, and the other end of the exhaust gas cooling output pipeline 705 is connected to the bottom of the wet scrubber 4; the exhaust gas heating input pipeline 701 is connected to the top of the wet scrubber 4; the exhaust gas heating output pipeline 702 is respectively connected to the exhaust gas heating exchanger exhaust gas output pipeline 703 and the purge air heater 706; the exhaust gas heating exchanger exhaust gas output pipeline 703 is connected to the activated carbon adsorption tower 5.
  • the purge air heater 706 can be used to preheat the pipe connected to the exhaust gas heating exchanger 7 when the exhaust gas heating exchanger 7 is started; the purge air heater 706 can also be used to provide supplementary heat when the pipe temperature in the exhaust gas heating exchanger 7 does not reach the required temperature.
  • the wet scrubber 4 is connected to the tail gas cooling output pipeline 705 through the wet scrubber tail gas output pipeline 401; and a wet scrubber inlet baffle 402 is also installed on the wet scrubber tail gas output pipeline 401; the top of the wet scrubber 4 is connected to the tail gas heating input pipeline 701 through the wet scrubber tail gas input pipeline 403; the top of the wet scrubber 4 is also connected to the dehumidification water delivery pipeline 404; a dehumidification water discharge pipeline 405 is arranged below the dehumidification water delivery pipeline 404; A cooling water delivery pipeline 406 is arranged below the dehumidification water discharge pipeline 405; a secondary dehumidification water delivery pipeline 407 is connected to the middle of the wet scrubbing tower 4; a cooling water pH meter input pipeline 408 and a salinity meter input water pipeline 409 are also connected to the bottom of the wet scrubbing tower 4; a cooling water outlet 410 and a cooling water drain gate 411
  • the activated carbon adsorption tower 5 is connected to the exhaust gas output pipeline 703 of the exhaust heating exchanger through the hot air purge pipeline 501 and the activated carbon adsorption tower exhaust gas inlet pipeline 502; the activated carbon adsorption tower 5 is connected to the chimney 9 through the activated carbon adsorption tower exhaust gas output pipeline 503 and the induced draft fan 504.
  • the pipeline beside the activated carbon adsorption tower 5 is an auxiliary pipeline for blowing and cleaning.
  • the black powder mixed in the tail gas is recovered by the cooling tower 2, and the tail gas pipeline between the cooling tower 2 and the bag filter 3 is sprayed with slaked lime 313 and activated carbon powder 314 for dry treatment, and the tail gas is preliminarily treated.
  • the bag filter 3, the wet water scrubber 4, and the activated carbon adsorption tower 5 further purify the tail gas and discharge it to the atmosphere through the tail gas discharge chimney 9. Powdered activated carbon is sprayed into the flue between the cooling tower 2 and the bag filter 4 to remove harmful substances such as heavy metals and dioxins in the tail gas.
  • the unreacted calcium hydroxide and the acidic harmful gas in the tail gas continue to react, further improving the removal efficiency.
  • Powdered slaked lime 313 is sprayed into the flue between the cooling tower 2 and the bag filter 3, so that the acidic gas in the tail gas reacts with the calcium hydroxide first and then is absorbed and removed, reducing the processing load of the wet scrubber.
  • the exhaust gas temperature in the bag filter 3 is always kept high (above 155°C) to ensure that there will be no corrosion caused by condensed water.
  • the dust in the exhaust gas is filtered by the bag and cleaned by online air, and then falls into the dust removal bin at the bottom of the bag filter.
  • the dust discharge valve sends the dust to the dust output pipe 309 below it and sends it out.
  • a bag bottom heater 307 is set to preheat the bag filter.
  • the tail gas at about 150°C enters the wet scrubber 4 through the exhaust gas inlet at the bottom of the wet scrubber 4 through the induced draft fan.
  • the tail gas passes through the cooling part at the bottom of the scrubber 4 and the absorption and dehumidification part at the top.
  • the coolant circulation pump sends the coolant at the bottom of the tower to the nozzle above the cooling part, sprays it downward to fully contact with the countercurrent tail gas, and reduces the tail gas temperature to the saturation temperature of 60-70°C to enhance the ability of the alkaline liquid to absorb acidic gas.
  • the tail gas after cooling and absorbing acidic gas enters the absorption and dehumidification part at the top of the scrubber.
  • the dehumidification water from the dehumidification water tank is sent by the dehumidification water circulation pump, cooled by the heat exchanger, and then transported to the nozzle above the absorption and dehumidification part and sprayed downward, evenly passing through the packing bed and fully contacting with the tail gas, dehumidifying the water in the tail gas.
  • the dehumidification water returns to the dehumidification water tank to form a cycle.
  • the tail gas temperature is further reduced, and the water content in the tail gas is also reduced accordingly.
  • the scrubbing wastewater is introduced into the wastewater treatment system.
  • the sodium hydroxide as alkali solution is transported by a tanker and stored in a sodium hydroxide storage tank.
  • the sodium hydroxide dilution pump transfers the sodium hydroxide into the sodium hydroxide dilution tank and is diluted to 10%.
  • the diluted sodium hydroxide solution is transported to the inlet pipe of the coolant circulation pump and the inlet pipe of the dehumidifying liquid circulation pump by the sodium hydroxide supply pump.
  • the purified tail gas is demisted by the demister at the top of the wet scrubber 4, it is heat exchanged with the tail gas at the scrubber inlet in the tail gas heater installed at the inlet of the wet scrubber system.
  • the temperature is further raised to about 135°C by a steam heater (in principle, no white smoke is visible in winter).
  • the tail gas-tail gas heater is set to increase the temperature after wet scrubbing and minimize steam consumption.
  • the heated exhaust gas is filtered through an activated carbon adsorption device and discharged into the atmosphere through a chimney.

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Abstract

A tail gas treatment system in the crushing and sorting process of a scrapped power lithium battery. The system comprises: a process water tank (1) used for storing process water; a cooling tower (2), wherein the process water tank (1) supplies water to the cooling tower (2), and the cooling tower (2) is used for cooling tail gas and humidifying and settling black powder mixed in the tail gas; a baghouse dust collector (3) used for performing baghouse dust collection on the tail gas delivered by the cooling tower (2); a filter bag dust collection device (6) fixedly mounted at the top of the baghouse dust collector (3); a wet-type gas washing tower (4) communicated with the baghouse dust collector (3) by means of a tail gas heating exchanger (7), the wet-type gas washing tower (4) being used for cooling and dehumidifying high-temperature tail gas in the baghouse dust collector (3) and absorbing acid gas; and an activated carbon adsorption tower (5) used for adsorbing and filtering tail gas discharged from the tail gas heating exchanger (7) and discharging the gas to the outside by means of a stack (9).

Description

一种报废动力锂电池破碎分选过程中的尾气处理系统An exhaust gas treatment system for the crushing and sorting process of scrapped power lithium batteries 技术领域Technical Field
本实用新型涉及环保与废气处理技术领域,特别是涉及一种报废动力锂电池破碎分选过程中的尾气处理系统。The utility model relates to the technical field of environmental protection and waste gas treatment, in particular to a tail gas treatment system in the process of crushing and sorting scrapped power lithium batteries.
背景技术Background technique
随着近年来新能源汽车的快速发展,报废车用动力电池的量随之增多,废旧车用动力电池的回收成为国家有关部门关心的重点问题。在废旧动力电池回收利用的技术方法中,采用拆解后进裂解炉裂解是目前主要方法之一,此方法简单实用、能充分回收废旧电池里的有价材料,但裂解过程中裂解炉产生的有机废气浓度高、成分复杂、气味难闻,对后端废气治理工艺要求较高。With the rapid development of new energy vehicles in recent years, the amount of scrapped automotive power batteries has increased, and the recycling of scrap automotive power batteries has become a key issue of concern to relevant national departments. Among the technical methods for recycling scrap power batteries, disassembly and then pyrolysis in a pyrolysis furnace is currently one of the main methods. This method is simple and practical, and can fully recover valuable materials in scrap batteries. However, the organic waste gas generated by the pyrolysis furnace during the pyrolysis process is of high concentration, complex composition, and unpleasant odor, which places high requirements on the back-end waste gas treatment process.
锂离子电池的组成主要有正极材料、负极材料、隔膜、粘结剂、导电剂等,其中,正极材料主要有钴酸锂、锰酸锂、磷酸铁锂及镍钴锰三元材料或镍钴铝三元材料,其中的钴、锂等作为一种稀有金属元素具有较高的回收价值。退役或报废动力锂电池的回收处理方法有干法回收、湿法回收和生物回收等,无论哪种方法,都要对电池进行拆解、单体破碎、分选等预处理。在预处理过程中,电池中的电解液会挥发溢出。锂电池电解液的主要成分包括溶剂如碳酸乙烯酯、碳酸甲乙酯、碳酸丙烯酯、碳酸二甲酯等,溶质如LiPF6。碳酸酯类物质进入到气体中,会使气体中VOCs超标,而LiPF6遇水会发生水解,生成氟化氢和磷酸等酸性物质,严重污染环境。因此,在报废动力锂电池回收过程中,必须对尾气进行环保处理。此外,磷酸和氢氟酸是两种 很有价值的化工原料,我国每年为了生产磷酸和氢氟酸都要大量采矿,既浪费资源,又破坏环境。Lithium-ion batteries are mainly composed of positive electrode materials, negative electrode materials, separators, binders, conductive agents, etc. Among them, the positive electrode materials mainly include lithium cobalt oxide, lithium manganese oxide, lithium iron phosphate and nickel-cobalt-manganese ternary materials or nickel-cobalt-aluminum ternary materials. Cobalt and lithium, as a rare metal element, have high recovery value. The recycling methods for retired or scrapped power lithium batteries include dry recycling, wet recycling and biological recycling. Regardless of the method, the battery must be disassembled, the monomers must be crushed, and the sorting must be pre-treated. During the pretreatment process, the electrolyte in the battery will evaporate and overflow. The main components of lithium battery electrolytes include solvents such as ethylene carbonate, ethyl methyl carbonate, propylene carbonate, dimethyl carbonate, etc., and solutes such as LiPF 6. When carbonate substances enter the gas, the VOCs in the gas will exceed the standard, and LiPF 6 will hydrolyze when it comes into contact with water to generate acidic substances such as hydrogen fluoride and phosphoric acid, which seriously pollute the environment. Therefore, in the process of recycling scrapped power lithium batteries, the exhaust gas must be treated in an environmentally friendly manner. In addition, phosphoric acid and hydrofluoric acid are two Phosphoric acid and hydrofluoric acid are very valuable chemical raw materials. my country has to mine large quantities of them every year to produce phosphoric acid and hydrofluoric acid, which not only wastes resources but also damages the environment.
锂电池极片回收处理设备可以有效将动力电池废弃极片破碎并研磨,极大提高脱粉率,脱粉率高于98%;全过程实现PLC自动控制以及全过程尾气收集处理,有效降低粉尘及电解液的排放,实现动力电池废弃极片的各组分环保分离回收,极大降低了人员操作风险和环境污染;该方法可明显提升生产能力,易实现工业级批量化生产。Lithium battery pole piece recycling and processing equipment can effectively crush and grind waste power battery pole pieces, greatly improving the powder removal rate, which is higher than 98%; the whole process realizes PLC automatic control and exhaust gas collection and treatment, effectively reducing the emission of dust and electrolyte, and realizing the environmentally friendly separation and recycling of various components of waste power battery pole pieces, greatly reducing personnel operation risks and environmental pollution; this method can significantly improve production capacity and easily realize industrial-grade mass production.
现阶段回收利用动力电池主要有两种方式:第一种方式是将容量不足原来70%-80%的电池进行梯次利用,这些电池已经不能满足汽车的使用要求,但是其剩余的容量还可以用在其他地方,比如家庭照明,能量储存,作为电源等;第二种方式是将容量降低至50%或者无法使用的电池进拆解资源化处理的材料回收利用。无论采用这二者均需要将动力电池模组经过拆解才能进行后续资源化回收和再利用。与此同时,其过程中将产生相应的尾气,需要安全高效环保的达标处理才能排放,减少对于环境的污染。At present, there are two main ways to recycle power batteries: the first is to use batteries with a capacity less than 70%-80% of the original capacity in a cascade manner. These batteries can no longer meet the requirements of automobile use, but their remaining capacity can still be used in other places, such as home lighting, energy storage, as a power source, etc.; the second is to dismantle and recycle batteries with a capacity reduced to 50% or unusable. Regardless of the two methods, the power battery module needs to be disassembled for subsequent resource recovery and reuse. At the same time, the process will generate corresponding exhaust gas, which needs to be safely, efficiently and environmentally friendly to meet the standards before it can be discharged to reduce pollution to the environment.
国内外市场上目前均无主流绿色高效的报废动力锂电池拆解破碎尾气的处理技术。新能源汽车动力电池退役时,通常是将整个报废动力锂电池拆解下来。由于新能源汽车的车型不同,报废动力锂电池的内外部结构设计、模组连接和放置位置各不相同,意味着统一拆解时尾气产生的数量和种类参差不齐,面临较大困难。There is currently no mainstream green and efficient waste power lithium battery dismantling and crushing exhaust gas treatment technology in the domestic and foreign markets. When the power battery of a new energy vehicle is retired, the entire scrapped power lithium battery is usually disassembled. Due to the different models of new energy vehicles, the internal and external structural design, module connection and placement of scrapped power lithium batteries are different, which means that the quantity and type of exhaust gas generated during unified disassembly are uneven, which faces great difficulties.
目前,报废动力锂电池中废旧锂电池在进行处置回收有用金属时,需要进行破碎、烘干等工序处理,会产生大量的尾气以及粉尘,不仅 增加了对环境的污染程度,同时也不利于周围人员的身体健康。因尾气中含有有机气体并会夹杂着破碎时产生的黑粉粉尘,采用市面上常规的尾气处理装置将无法达到对黑粉收集的目的,并且对尾气的处理效果不佳。因此,需要研发一种针对报废动力电池破碎分选过程中产生的尾气进行处理的装置可以很好地解决这方面的很多问题,大大提高工作效率。At present, when scrapped lithium batteries are disposed of to recover useful metals, they need to be crushed, dried and other processes, which will produce a lot of tail gas and dust. This increases the degree of environmental pollution and is also detrimental to the health of people around. Since the tail gas contains organic gas and is mixed with black powder dust generated during crushing, the conventional tail gas treatment device on the market will not be able to achieve the purpose of collecting black powder, and the treatment effect of the tail gas is not good. Therefore, it is necessary to develop a device for treating the tail gas generated during the crushing and sorting of scrapped power batteries, which can solve many problems in this regard and greatly improve work efficiency.
实用新型内容Utility Model Content
本实用新型的目的是提供一种报废动力锂电池破碎分选过程中的尾气处理系统,以解决上述现有技术存在的问题,能够实现对尾气中夹杂黑粉的收集,对尾气的高效安全环保处理,减少对环境造成的污染。The purpose of the utility model is to provide an exhaust gas treatment system in the process of crushing and sorting scrapped power lithium batteries, so as to solve the problems existing in the above-mentioned prior art, and to realize the collection of black powder mixed in the exhaust gas, to efficiently, safely and environmentally treat the exhaust gas, and to reduce the pollution caused to the environment.
为实现上述目的,本实用新型提供了如下方案:本实用新型提供一种报废动力锂电池破碎分选过程中的尾气处理系统,包括:工艺水箱;所述工艺水箱用于存放工艺用水;To achieve the above purpose, the utility model provides the following solution: The utility model provides an exhaust gas treatment system in the process of crushing and sorting scrapped power lithium batteries, including: a process water tank; the process water tank is used to store process water;
冷却塔;所述工艺水箱为所述冷却塔供水;所述冷却塔用于对尾气降温,将尾气中混入的少量黑粉加湿沉降;Cooling tower; the process water tank supplies water to the cooling tower; the cooling tower is used to cool the exhaust gas and humidify and settle a small amount of black powder mixed in the exhaust gas;
布袋除尘器;所述布袋除尘器用于将所述冷却塔输送的尾气进行布袋除尘;Bag dust collector; the bag dust collector is used to carry out bag dust removal on the tail gas transported by the cooling tower;
滤袋除尘装置;所述滤袋除尘装置固定安装在所述布袋除尘器顶部;Filter bag dust removal device; the filter bag dust removal device is fixedly installed on the top of the bag dust collector;
湿式洗气塔;所述湿式洗气塔通过尾气加热交换器与所述布袋除尘器连通;所述湿式洗气塔用于将所述布袋除尘器内高温尾气降温除 湿吸收酸性气体;Wet scrubber; the wet scrubber is connected to the bag filter through an exhaust gas heat exchanger; the wet scrubber is used to cool down and remove the high-temperature exhaust gas in the bag filter. Wet absorption of acid gases;
活性炭吸附塔;用于将所述尾气加热交换器内排放的尾气进行吸附过滤并将气体通过烟囱排放至外界。Activated carbon adsorption tower; used for adsorbing and filtering the exhaust gas discharged from the exhaust gas heating exchanger and discharging the gas to the outside through the chimney.
所述工艺水箱连通有排水管道,补水管道和出水管道;所述排水管道一端连通于所述工艺水箱水位线上方一侧;所述排水管道另一端与外排管道连通;所述补水管道将所述工艺水箱顶部与工业水池连通;所述出水管道一端与所述工艺水箱底部连通,所述出水管道另一端安装有降温水泵;所述降温水泵通过降温水出口门与所述冷却塔连通。The process water tank is connected with a drainage pipe, a water supply pipe and a water outlet pipe; one end of the drainage pipe is connected to the side above the water level line of the process water tank; the other end of the drainage pipe is connected to the external drainage pipe; the water supply pipe connects the top of the process water tank with the industrial water pool; one end of the water outlet pipe is connected to the bottom of the process water tank, and a cooling water pump is installed at the other end of the water outlet pipe; the cooling water pump is connected to the cooling tower through a cooling water outlet door.
所述冷却塔连通有冷却塔尾气输送管道,冷却塔降温水输送管道,冷却塔压缩空气输送管道,冷却塔尾气输出管道和黑粉输出管道;所述冷却塔尾气输送管道置于所述冷却塔顶部一端,将尾气导入所述冷却塔内;所述冷却塔降温水输送管道一端与所述降温水出口门固定连接,另一端与所述冷却塔顶部连通;所述冷却塔压缩空气输送管道将所述冷却塔顶面与压缩空气源连通;所述冷却塔尾气输出管道安装所述冷却塔底部侧壁,且所述冷却塔尾气输出管道与所述冷却塔侧壁形成60°-62°夹角;所述黑粉输出管道通过冷却塔旋转阀安装于所述冷却塔底面;The cooling tower is connected with a cooling tower tail gas delivery pipeline, a cooling tower cooling water delivery pipeline, a cooling tower compressed air delivery pipeline, a cooling tower tail gas output pipeline and a black powder output pipeline; the cooling tower tail gas delivery pipeline is placed at one end of the top of the cooling tower to introduce the tail gas into the cooling tower; one end of the cooling tower cooling water delivery pipeline is fixedly connected to the cooling water outlet door, and the other end is connected to the top of the cooling tower; the cooling tower compressed air delivery pipeline connects the top surface of the cooling tower with a compressed air source; the cooling tower tail gas output pipeline is installed on the bottom side wall of the cooling tower, and the cooling tower tail gas output pipeline forms an angle of 60°-62° with the cooling tower side wall; the black powder output pipeline is installed on the bottom surface of the cooling tower through a cooling tower rotary valve;
所述冷却塔尾气输出管道内温度保持在150℃-155℃。The temperature in the cooling tower tail gas output pipeline is maintained at 150°C-155°C.
所述冷却塔底部还固定安装有冷却塔加热器;所述冷却塔内腔底部还安装有冷却塔旋转刮板。A cooling tower heater is also fixedly installed at the bottom of the cooling tower; and a cooling tower rotating scraper is also installed at the bottom of the inner cavity of the cooling tower.
所述布袋除尘器连通有布袋除尘器尾气输送管道,布袋除尘器尾气输出管道,布袋除尘器压缩空气输送管道和布袋除尘器尘渣输出管 道;所述布袋除尘器尾气输送管道一端与所述冷却塔尾气输出管道连通,另一端与所述布袋除尘器中部连通,且所述布袋除尘器尾气输送管道正对所述布袋除尘器内的滤袋;所述布袋除尘器尾气输送管道上还开设有用于添加消石灰粉和活性炭粉的干粉添加口;The bag dust collector is connected to a bag dust collector tail gas delivery pipeline, a bag dust collector tail gas output pipeline, a bag dust collector compressed air delivery pipeline and a bag dust collector dust residue output pipe. One end of the bag filter exhaust gas delivery pipeline is connected to the cooling tower exhaust gas output pipeline, and the other end is connected to the middle of the bag filter, and the bag filter exhaust gas delivery pipeline is directly facing the filter bag in the bag filter; the bag filter exhaust gas delivery pipeline is also provided with a dry powder addition port for adding slaked lime powder and activated carbon powder;
所述布袋除尘器尾气输出管道一端与所述布袋除尘器顶部一侧连通;所述布袋除尘器尾气输出管道另一端安装有布袋出口挡板;所述布袋除尘器压缩空气输送管道内通入压缩空气;所述压缩空气还通过吹扫压缩空气输送管道通入所述滤袋除尘装置内;所述布袋除尘器尘渣输出管道安装于所述布袋除尘器底部。One end of the bag-type dust collector exhaust gas output pipe is connected to one side of the top of the bag-type dust collector; a bag outlet baffle is installed at the other end of the bag-type dust collector exhaust gas output pipe; compressed air is introduced into the compressed air delivery pipe of the bag-type dust collector; the compressed air is also introduced into the filter bag dust removal device through the purging compressed air delivery pipe; the dust residue output pipe of the bag-type dust collector is installed at the bottom of the bag-type dust collector.
所述布袋除尘器内腔顶部还安装有布袋除尘仓挡板;所述滤袋下方设置有振打压缩空气装置;所述布袋除尘器尾气输送管道和布袋除尘器尾气输出管道还通过布袋加热器和加热风机直接连通,用于保证尾气温度保持在155℃以上;所述布袋加热器还通入有吹扫空气。A bag dust bin baffle is also installed on the top of the inner cavity of the bag dust collector; a vibration compressed air device is arranged under the filter bag; the bag dust collector exhaust gas delivery pipeline and the bag dust collector exhaust gas output pipeline are also directly connected through a bag heater and a heating fan to ensure that the exhaust gas temperature is maintained above 155°C; the bag heater is also introduced with purge air.
所述滤袋除尘装置包括脉冲气包和吹气管;所述吹扫压缩空气输送管道与所述脉冲气包顶部连通;所述脉冲气包底部安装有若干根所述吹气管;所述吹气管伸入所述布袋除尘器内,且正对所述滤袋设置;所述吹气管上安装有若干个吹气控制阀。The filter bag dust removal device includes a pulse air bag and an air blowing pipe; the purge compressed air delivery pipeline is connected to the top of the pulse air bag; a plurality of air blowing pipes are installed at the bottom of the pulse air bag; the air blowing pipe extends into the bag dust collector and is arranged directly opposite to the filter bag; and a plurality of air blowing control valves are installed on the air blowing pipe.
所述尾气加热交换器连通有尾气升温输入管道,尾气升温输出管道,尾气加热交换器尾气输出管道,尾气降温输入管道和尾气降温输出管道;所述尾气降温输入管道一端安装在所述布袋出口挡板上,所述尾气降温输入管道另一端与所述尾气加热交换器底部连通;所述尾气降温输出管道一端与所述尾气加热交换器底部连通,尾气降温输出 管道另一端与所述湿式洗气塔底部连通;所述尾气升温输入管道与所述湿式洗气塔顶部连通;所述尾气升温输出管道与所述尾气加热交换器尾气输出管道和吹扫空气加热器分别连通;所述尾气加热交换器尾气输出管道与所述活性炭吸附塔连通。The exhaust gas heating exchanger is connected with an exhaust gas heating input pipeline, an exhaust gas heating output pipeline, an exhaust gas heating exchanger exhaust gas output pipeline, an exhaust gas cooling input pipeline and an exhaust gas cooling output pipeline; one end of the exhaust gas cooling input pipeline is installed on the bag outlet baffle, and the other end of the exhaust gas cooling input pipeline is connected to the bottom of the exhaust gas heating exchanger; one end of the exhaust gas cooling output pipeline is connected to the bottom of the exhaust gas heating exchanger, and the exhaust gas cooling output pipeline is connected to the bottom of the exhaust gas heating exchanger. The other end of the pipeline is connected to the bottom of the wet scrubber; the exhaust gas heating input pipeline is connected to the top of the wet scrubber; the exhaust gas heating output pipeline is connected to the exhaust gas output pipeline of the exhaust gas heating exchanger and the purge air heater respectively; the exhaust gas output pipeline of the exhaust gas heating exchanger is connected to the activated carbon adsorption tower.
所述湿式洗气塔通过湿式洗气塔尾气输出管道与所述尾气降温输出管道连通;且所述湿式洗气塔尾气输出管道上还安装有湿式洗气塔进口挡板;所述湿式洗气塔顶部通过湿式洗气塔尾气输入管道与所述尾气升温输入管道连通;所述湿式洗气塔顶部还连通有减湿水输送管道;所述减湿水输送管道下方设置有减湿水排放管道;所述减湿水排放管道下方设置有冷却水输送管道;所述湿式洗气塔中部连通有二次减湿水输送管道;所述湿式洗气塔底部还连通有冷却水ph计输入管道和盐度计输入水管道;所述湿式洗气塔底部还安装有冷却水输出口和冷却水放水门。The wet scrubber is connected to the exhaust gas cooling output pipeline through the wet scrubber exhaust gas output pipeline; and a wet scrubber inlet baffle is also installed on the wet scrubber exhaust gas output pipeline; the top of the wet scrubber is connected to the exhaust gas heating input pipeline through the wet scrubber exhaust gas input pipeline; the top of the wet scrubber is also connected to the dehumidification water delivery pipeline; a dehumidification water discharge pipeline is arranged below the dehumidification water delivery pipeline; a cooling water delivery pipeline is arranged below the dehumidification water discharge pipeline; a secondary dehumidification water delivery pipeline is connected to the middle part of the wet scrubber; the bottom of the wet scrubber is also connected to a cooling water pH meter input pipeline and a salinity meter input water pipeline; the bottom of the wet scrubber is also equipped with a cooling water output port and a cooling water drain gate.
所述活性炭吸附塔通过热空气吹扫管道和活性炭吸附塔尾气进入管道与所述尾气加热交换器尾气输出管道连通;所述活性炭吸附塔通过活性炭吸附塔尾气输出管道和引风机与所述烟囱连通。The activated carbon adsorption tower is connected to the exhaust gas output pipeline of the exhaust gas heating exchanger through the hot air purge pipeline and the activated carbon adsorption tower exhaust gas inlet pipeline; the activated carbon adsorption tower is connected to the chimney through the activated carbon adsorption tower exhaust gas output pipeline and the induced draft fan.
本实用新型公开了以下技术效果:本系统采用干法处理尾气易于维护、冷却塔的设计既紧凑又达到最优化、系统针对负荷的变动具有良好的控制性、整体的压差很低,可节省引风机的动力、统集成性高,易于操作。The utility model discloses the following technical effects: the system adopts dry method to treat exhaust gas and is easy to maintain; the design of cooling tower is compact and optimized; the system has good controllability for load changes; the overall pressure difference is very low, which can save the power of induced draft fan; the system has high integration and is easy to operate.
附图说明BRIEF DESCRIPTION OF THE DRAWINGS
为了更清楚地说明本实用新型实施例或现有技术中的技术方案, 下面将对实施例中所需要使用的附图作简单地介绍,显而易见地,下面描述中的附图仅仅是本实用新型的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动性的前提下,还可以根据这些附图获得其他的附图。In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, The following is a brief introduction to the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.
图1为本实用新型系统的结构示意图;FIG1 is a schematic diagram of the structure of the utility model system;
图2为本实用新型系统的工艺水箱的结构示意图;FIG2 is a schematic diagram of the structure of the process water tank of the utility model system;
图3为本实用新型系统的冷却塔的内部结构示意图;FIG3 is a schematic diagram of the internal structure of a cooling tower of the utility model system;
图4为本实用新型系统的布袋除尘器的结构示意图;FIG4 is a schematic diagram of the structure of a bag filter system of the utility model;
图5为本实用新型系统的湿式洗气塔的结构示意图;FIG5 is a schematic diagram of the structure of a wet scrubber of the utility model system;
图6为本实用新型系统的活性炭的结构示意图。其中,1-工艺水箱,101-排水管道,102-补水管道,103-出水管道,104-外排管道,105-降温水泵,106-降温水出口门,2-冷却塔,201-冷却塔尾气输送管道,202-冷却塔降温水输送管道,203-冷却塔压缩空气输送管道,204-冷却塔加热器,205-冷却塔尾气输出管道,206-冷却塔旋转阀,207-黑粉输出管道,208-冷却塔旋转刮板,3-布袋除尘器,301-布袋除尘器尾气输送管道,302-滤袋,303-布袋除尘器尾气输出管道,304-布袋出口挡板,305-布袋除尘仓挡板,306-振打压缩空气装置,307-布袋加热器,308-布袋除尘器压缩空气输送管道,309-布袋除尘器尘渣输出管道,310-吹扫压缩空气输送管道,311-压缩空气,312-吹扫空气,313-消石灰粉,314-活性炭粉,4-湿式洗气塔,401-湿式洗气塔尾气输出管道,402-湿式洗气塔进口挡板,403-湿式洗气塔尾气输入管道,404-减湿水输送管道,405-减湿水排放管道,406-冷却水输送管道,407- 二次减湿水输送管道,408-冷却水pH计输入管道,409-盐度计输入水管道,410-冷却水输出口,411-冷却水放水门,5-活性炭吸附塔,501-热空气吹扫管道,502-活性炭吸附塔尾气进入管道,503-活性炭吸附塔尾气输出管道,504-引风机,6-滤袋除尘装置,601-脉冲气包,602-吹气管,603-吹气控制阀,7-尾气加热交换器,701-尾气升温输入管道,702-尾气升温输出管道,703-加热交换器尾气输出管道,704-尾气降温输入管道,705-尾气降温输出管道,706-吹扫空气加热器,8-布袋加热器,9-烟囱。Figure 6 is a schematic diagram of the structure of the activated carbon of the utility model system. Among them, 1-process water tank, 101-drainage pipeline, 102-water supply pipeline, 103-water outlet pipeline, 104-external pipeline, 105-cooling water pump, 106-cooling water outlet door, 2-cooling tower, 201-cooling tower tail gas delivery pipeline, 202-cooling tower cooling water delivery pipeline, 203-cooling tower compressed air delivery pipeline, 204-cooling tower heater, 205-cooling tower tail gas output pipeline, 206-cooling tower rotary valve, 207-black powder output pipeline, 208-cooling tower rotary scraper, 3-bag dust collector, 301-bag dust collector tail gas delivery pipeline, 302-filter bag, 303-bag dust collector tail gas output pipeline, 3 04-bag outlet baffle, 305-bag dust collector bin baffle, 306-vibrating compressed air device, 307-bag heater, 308-bag dust collector compressed air delivery pipeline, 309-bag dust collector dust output pipeline, 310-purge compressed air delivery pipeline, 311-compressed air, 312-purge air, 313-slaked lime powder, 314-activated carbon powder, 4-wet scrubber, 401-wet scrubber tail gas output pipeline, 402-wet scrubber inlet baffle, 403-wet scrubber tail gas input pipeline, 404-dehumidification water delivery pipeline, 405-dehumidification water discharge pipeline, 406-cooling water delivery pipeline, 407- Secondary dehumidification water delivery pipeline, 408-cooling water pH meter input pipeline, 409-salinity meter input water pipeline, 410-cooling water output port, 411-cooling water drain gate, 5-activated carbon adsorption tower, 501-hot air purge pipeline, 502-activated carbon adsorption tower tail gas inlet pipeline, 503-activated carbon adsorption tower tail gas output pipeline, 504-induced draft fan, 6-filter bag dust removal device, 601-pulse air bag, 602-air blowing pipe, 603-air blowing control valve, 7-tail gas heating exchanger, 701-tail gas heating input pipeline, 702-tail gas heating output pipeline, 703-heating exchanger tail gas output pipeline, 704-tail gas cooling input pipeline, 705-tail gas cooling output pipeline, 706-purge air heater, 8-bag heater, 9-chimney.
具体实施方式Detailed ways
下面将结合本实用新型实施例中的附图,对本实用新型实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅仅是本实用新型一部分实施例,而不是全部的实施例。基于本实用新型中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都属于本实用新型保护的范围。The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
为使本实用新型的上述目的、特征和优点能够更加明显易懂,下面结合附图和具体实施方式对本实用新型作进一步详细的说明。In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.
本实用新型提供一种报废动力锂电池破碎分选过程中的尾气处理系统,包括:工艺水箱1;工艺水箱1用于存放工艺用水;The utility model provides an exhaust gas treatment system in the process of crushing and sorting scrapped power lithium batteries, comprising: a process water tank 1; the process water tank 1 is used to store process water;
冷却塔2;工艺水箱1为冷却塔2供水;冷却塔2用于对尾气降温,将尾气中的黑粉加湿沉降;Cooling tower 2; process water tank 1 supplies water to cooling tower 2; cooling tower 2 is used to cool the exhaust gas and humidify and settle the black powder in the exhaust gas;
布袋除尘器3;布袋除尘器3用于将冷却塔2输送的尾气进行布袋除尘; Bag dust collector 3; bag dust collector 3 is used to carry out bag dust removal on the exhaust gas transported by cooling tower 2;
滤袋除尘装置6;滤袋除尘装置6固定安装在布袋除尘器3顶部;The filter bag dust removal device 6 is fixedly mounted on the top of the bag dust collector 3;
湿式洗气塔4;湿式洗气塔4通过尾气加热交换器7与布袋除尘器3连通;湿式洗气塔4用于将布袋除尘器3内高温尾气降温除湿;Wet scrubber 4; the wet scrubber 4 is connected to the bag filter 3 through the exhaust gas heating exchanger 7; the wet scrubber 4 is used to cool and dehumidify the high-temperature exhaust gas in the bag filter 3;
活性炭吸附塔5;用于将尾气加热交换器7内排放的尾气进行吸附过滤并将气体通过烟囱9排放至外界。The activated carbon adsorption tower 5 is used to adsorb and filter the exhaust gas discharged from the exhaust gas heating exchanger 7 and discharge the gas to the outside through the chimney 9.
进一步的,在本实用新型中,工艺水箱1,其用于存放工艺用水以及给冷却塔、湿式洗气塔供水;Further, in the present invention, a process water tank 1 is used to store process water and supply water to a cooling tower and a wet scrubber;
冷却塔2,其用于对尾气进行降温,将尾气中的黑粉加湿使黑粉沉降利于收集;Cooling tower 2, which is used to cool the exhaust gas and humidify the black powder in the exhaust gas to make it settle and facilitate collection;
布袋除尘器3,其用于对尾气干法处理式所加的消石灰、活性炭进行除尘处理,在布袋上形成消石灰及活性炭混合组成的滤饼,强化尾气进行化学反应;The bag filter 3 is used to remove dust from the slaked lime and activated carbon added in the dry exhaust gas treatment, forming a filter cake composed of slaked lime and activated carbon on the bag to strengthen the chemical reaction of the exhaust gas;
滤袋除尘装置6,其用于对布袋上的滤饼进行清理,当布袋两侧压强差达到触发值时对布袋进行除尘清理;The filter bag dust removal device 6 is used to clean the filter cake on the bag and remove dust from the bag when the pressure difference on both sides of the bag reaches a trigger value;
湿式洗气塔4,其用于对尾气降温使其达到60℃—70℃,降低吸收饱和度,吸收酸性气体;Wet scrubber 4, which is used to cool the tail gas to 60°C-70°C, reduce the absorption saturation, and absorb acidic gases;
尾气加热交换器7,其用于在湿式洗气塔内被降温处理后的尾气加热,加热至135℃左右减少水蒸气的消耗;The tail gas heating exchanger 7 is used to heat the tail gas after being cooled in the wet scrubber to about 135°C to reduce the consumption of water vapor;
活性炭吸附塔5,其用于对尾气进行吸附过滤;An activated carbon adsorption tower 5, which is used to adsorb and filter the tail gas;
烟囱9,其用于排放净化后的尾气;A chimney 9, which is used to discharge the purified exhaust gas;
布袋加热器8,其用于使尾气温度始终保持高温(155℃以上),确保不会产生因凝结水而引起腐蚀的问题。 The bag heater 8 is used to keep the exhaust gas temperature at a high temperature (above 155° C.) to ensure that there is no corrosion problem caused by condensed water.
在本实用新型的一个实施例中,冷却塔2尾气入口温度保持在200℃左右,出口温度155℃左右;布袋除尘器3整个出处理过程范围内在155-150℃左右;布袋除尘器3到尾气加热交换器7入口之间的温度为150℃左右,尾气加热交换器7加热出口为97-103℃,湿式洗气塔4入口97-103℃,出口45-62℃;尾气加热交换器7被加热入口45-62℃,出口135℃左右。In one embodiment of the utility model, the exhaust gas inlet temperature of the cooling tower 2 is maintained at about 200°C, and the outlet temperature is about 155°C; the bag filter 3 is about 155-150°C during the entire treatment process; the temperature between the bag filter 3 and the inlet of the exhaust gas heating exchanger 7 is about 150°C, the exhaust gas heating exchanger 7 heats the outlet to 97-103°C, the wet scrubber 4 inlet is 97-103°C, and the outlet is 45-62°C; the exhaust gas heating exchanger 7 is heated at the inlet to 45-62°C, and the outlet is about 135°C.
工艺水箱1连通有排水管道101,补水管道102和出水管道103;排水管道101一端连通于工艺水箱1水位线上方一侧;排水管道101另一端与外排管道104连通;补水管道102将工艺水箱1顶部与工业水池连通;出水管道103一端与工艺水箱1底部连通,出水管道103另一端安装有降温水泵105;降温水泵105通过降温水出口门106与冷却塔2连通。The process water tank 1 is connected with a drainage pipe 101, a water supply pipe 102 and a water outlet pipe 103; one end of the drainage pipe 101 is connected to the side above the water level line of the process water tank 1; the other end of the drainage pipe 101 is connected with an external drainage pipe 104; the water supply pipe 102 connects the top of the process water tank 1 with the industrial water pool; one end of the water outlet pipe 103 is connected with the bottom of the process water tank 1, and a cooling water pump 105 is installed at the other end of the water outlet pipe 103; the cooling water pump 105 is connected with the cooling tower 2 through a cooling water outlet door 106.
冷却塔2连通有冷却塔尾气输送管道201,冷却塔降温水输送管道202,冷却塔压缩空气输送管道203,冷却塔尾气输出管道205和黑粉输出管道207;冷却塔尾气输送管道201置于冷却塔2顶部一端,将尾气导入冷却塔2内;冷却塔降温水输送管道202一端与降温水出口门106固定连接,另一端与冷却塔2顶部连通;冷却塔压缩空气输送管道203将冷却塔2顶面与压缩空气源连通;冷却塔尾气输出管道205安装冷却塔底部侧壁,且冷却塔尾气输出管道205与冷却塔2侧壁形成60°-62°夹角;黑粉输出管道207通过冷却塔旋转阀206安装于冷却塔2底面;The cooling tower 2 is connected with a cooling tower tail gas delivery pipeline 201, a cooling tower cooling water delivery pipeline 202, a cooling tower compressed air delivery pipeline 203, a cooling tower tail gas output pipeline 205 and a black powder output pipeline 207; the cooling tower tail gas delivery pipeline 201 is placed at one end of the top of the cooling tower 2 to introduce the tail gas into the cooling tower 2; one end of the cooling tower cooling water delivery pipeline 202 is fixedly connected to the cooling water outlet door 106, and the other end is connected to the top of the cooling tower 2; the cooling tower compressed air delivery pipeline 203 connects the top surface of the cooling tower 2 with the compressed air source; the cooling tower tail gas output pipeline 205 is installed on the bottom side wall of the cooling tower, and the cooling tower tail gas output pipeline 205 forms an angle of 60°-62° with the side wall of the cooling tower 2; the black powder output pipeline 207 is installed on the bottom surface of the cooling tower 2 through the cooling tower rotary valve 206;
冷却塔尾气输出管道205内温度保持在150℃-155℃。 The temperature in the cooling tower tail gas output pipe 205 is maintained at 150°C-155°C.
冷却塔2底部还固定安装有冷却塔加热器204;冷却塔2内腔底部还安装有冷却塔旋转刮板208。A cooling tower heater 204 is also fixedly installed at the bottom of the cooling tower 2; a cooling tower rotating scraper 208 is also installed at the bottom of the inner cavity of the cooling tower 2.
布袋除尘器3连通有布袋除尘器尾气输送管道301,布袋除尘器尾气输出管道303,布袋除尘器压缩空气输送管道308和布袋除尘器尘渣输出管道309;布袋除尘器尾气输送管道301一端与冷却塔尾气输出管道205连通,另一端与布袋除尘器3中部连通,且布袋除尘器尾气输送管道301正对布袋除尘器3内的滤袋302;布袋除尘器尾气输送管道301上还开设有用于添加消石灰粉313和活性炭粉314的干粉添加口;The bag-type dust collector 3 is connected with a bag-type dust collector tail gas delivery pipeline 301, a bag-type dust collector tail gas output pipeline 303, a bag-type dust collector compressed air delivery pipeline 308 and a bag-type dust collector dust residue output pipeline 309; one end of the bag-type dust collector tail gas delivery pipeline 301 is connected with the cooling tower tail gas output pipeline 205, and the other end is connected with the middle of the bag-type dust collector 3, and the bag-type dust collector tail gas delivery pipeline 301 is directly opposite to the filter bag 302 in the bag-type dust collector 3; the bag-type dust collector tail gas delivery pipeline 301 is also provided with a dry powder addition port for adding slaked lime powder 313 and activated carbon powder 314;
布袋除尘器尾气输出管道303一端与布袋除尘器3顶部一侧连通;布袋除尘器尾气输出管道303另一端安装有布袋出口挡板304;布袋除尘器压缩空气输送管道308内通入压缩空气311;压缩空气311还通过吹扫压缩空气输送管道310通入滤袋除尘装置6内;布袋除尘器尘渣输出管道309安装于布袋除尘器3底部。One end of the bag-type dust collector exhaust gas output pipe 303 is connected to one side of the top of the bag-type dust collector 3; the other end of the bag-type dust collector exhaust gas output pipe 303 is installed with a bag outlet baffle 304; compressed air 311 is introduced into the bag-type dust collector compressed air delivery pipe 308; compressed air 311 is also introduced into the filter bag dust removal device 6 through the purge compressed air delivery pipe 310; the bag-type dust residue output pipe 309 is installed at the bottom of the bag-type dust collector 3.
布袋除尘器3内腔顶部还安装有布袋除尘仓挡板305;滤袋302下方设置有振打压缩空气装置306;布袋除尘器尾气输送管道301和布袋除尘器尾气输出管道303还通过布袋加热器307和加热风机直接连通,用于保证尾气温度保持在155℃以上;布袋加热器307还通入有吹扫空气312。A bag dust bin baffle 305 is also installed on the top of the inner cavity of the bag dust collector 3; a vibration compressed air device 306 is arranged under the filter bag 302; the bag dust collector exhaust gas delivery pipeline 301 and the bag dust collector exhaust gas output pipeline 303 are also directly connected through the bag dust collector heater 307 and the heating fan to ensure that the exhaust gas temperature is maintained above 155°C; the bag dust collector 307 is also introduced with purge air 312.
进一步的,在本实施例中,振打压缩空气装置306为现有设备,通过压缩空气提供动力,使活塞上下运动来振打滤袋302,以抖落粉尘。 Furthermore, in this embodiment, the vibrating compressed air device 306 is an existing device, which provides power through compressed air to make the piston move up and down to vibrate the filter bag 302 to shake off the dust.
滤袋除尘装置6包括脉冲气包601和吹气管602;吹扫压缩空气输送管道310与脉冲气包601顶部连通;脉冲气包601底部安装有若干根吹气管602;吹气管602伸入布袋除尘器3内,且正对滤袋302设置;吹气管602上安装有若干个吹气控制阀603。The filter bag dust removal device 6 includes a pulse air bag 601 and an air blowing pipe 602; the purge compressed air delivery pipeline 310 is connected to the top of the pulse air bag 601; a plurality of air blowing pipes 602 are installed at the bottom of the pulse air bag 601; the air blowing pipe 602 extends into the bag dust collector 3 and is arranged directly opposite the filter bag 302; and a plurality of air blowing control valves 603 are installed on the air blowing pipe 602.
尾气加热交换器7连通有尾气升温输入管道701,尾气升温输出管道702,尾气加热交换器尾气输出管道703,尾气降温输入管道704和尾气降温输出管道705;尾气降温输入管道704一端安装在布袋出口挡板304上,尾气降温输入管道704另一端与尾气加热交换器7底部连通;尾气降温输出管道705一端与尾气加热交换器7底部连通,尾气降温输出管道705另一端与湿式洗气塔4底部连通;尾气升温输入管道701与湿式洗气塔4顶部连通;尾气升温输出管道702与尾气加热交换器尾气输出管道703和吹扫空气加热器706分别连通;尾气加热交换器尾气输出管道703与活性炭吸附塔5连通。The exhaust gas heating exchanger 7 is connected with an exhaust gas heating input pipeline 701, an exhaust gas heating output pipeline 702, an exhaust gas heating exchanger exhaust gas output pipeline 703, an exhaust gas cooling input pipeline 704 and an exhaust gas cooling output pipeline 705; one end of the exhaust gas cooling input pipeline 704 is installed on the bag outlet baffle 304, and the other end of the exhaust gas cooling input pipeline 704 is connected to the bottom of the exhaust gas heating exchanger 7; one end of the exhaust gas cooling output pipeline 705 is connected to the bottom of the exhaust gas heating exchanger 7, and the other end of the exhaust gas cooling output pipeline 705 is connected to the bottom of the wet scrubber 4; the exhaust gas heating input pipeline 701 is connected to the top of the wet scrubber 4; the exhaust gas heating output pipeline 702 is respectively connected to the exhaust gas heating exchanger exhaust gas output pipeline 703 and the purge air heater 706; the exhaust gas heating exchanger exhaust gas output pipeline 703 is connected to the activated carbon adsorption tower 5.
进一步的,吹扫空气加热器706可以用来在尾气加热交换器7启动时,将尾气加热交换器7连通的管道预热;吹扫空气加热器706还可以用来当尾气加热交换器7内管道温度达不到要求温度时,进行补热。Furthermore, the purge air heater 706 can be used to preheat the pipe connected to the exhaust gas heating exchanger 7 when the exhaust gas heating exchanger 7 is started; the purge air heater 706 can also be used to provide supplementary heat when the pipe temperature in the exhaust gas heating exchanger 7 does not reach the required temperature.
湿式洗气塔4通过湿式洗气塔尾气输出管道401与尾气降温输出管道705连通;且湿式洗气塔尾气输出管道401上还安装有湿式洗气塔进口挡板402;湿式洗气塔4顶部通过湿式洗气塔尾气输入管道403与尾气升温输入管道701连通;湿式洗气塔4顶部还连通有减湿水输送管道404;减湿水输送管道404下方设置有减湿水排放管道405; 减湿水排放管道405下方设置有冷却水输送管道406;湿式洗气塔4中部连通有二次减湿水输送管道407;湿式洗气塔4底部还连通有冷却水ph计输入管道408和盐度计输入水管道409;湿式洗气塔4底部还安装有冷却水输出口410和冷却水放水门411。The wet scrubber 4 is connected to the tail gas cooling output pipeline 705 through the wet scrubber tail gas output pipeline 401; and a wet scrubber inlet baffle 402 is also installed on the wet scrubber tail gas output pipeline 401; the top of the wet scrubber 4 is connected to the tail gas heating input pipeline 701 through the wet scrubber tail gas input pipeline 403; the top of the wet scrubber 4 is also connected to the dehumidification water delivery pipeline 404; a dehumidification water discharge pipeline 405 is arranged below the dehumidification water delivery pipeline 404; A cooling water delivery pipeline 406 is arranged below the dehumidification water discharge pipeline 405; a secondary dehumidification water delivery pipeline 407 is connected to the middle of the wet scrubbing tower 4; a cooling water pH meter input pipeline 408 and a salinity meter input water pipeline 409 are also connected to the bottom of the wet scrubbing tower 4; a cooling water outlet 410 and a cooling water drain gate 411 are also installed at the bottom of the wet scrubbing tower 4.
活性炭吸附塔5通过热空气吹扫管道501和活性炭吸附塔尾气进入管道502与尾气加热交换器尾气输出管道703连通;活性炭吸附塔5通过活性炭吸附塔尾气输出管道503和引风机504与烟囱9连通。The activated carbon adsorption tower 5 is connected to the exhaust gas output pipeline 703 of the exhaust heating exchanger through the hot air purge pipeline 501 and the activated carbon adsorption tower exhaust gas inlet pipeline 502; the activated carbon adsorption tower 5 is connected to the chimney 9 through the activated carbon adsorption tower exhaust gas output pipeline 503 and the induced draft fan 504.
进一步的,如图1,活性炭吸附塔5旁侧的管道是用于吹扫清灰的附属管道。Furthermore, as shown in FIG1 , the pipeline beside the activated carbon adsorption tower 5 is an auxiliary pipeline for blowing and cleaning.
在本实用新型的一个实施例中,本实用新型对尾气进行处理时,通过冷却塔2将尾气中夹杂的黑粉进行回收,冷却塔2和布袋除尘器3之间的尾气管道中采用喷人消石灰313和活性炭粉314进行干法处理,初步对尾气进行处理,由布袋除尘器3、湿水洗气塔4、活性炭吸附塔5进一步将尾气净化有尾气排放烟囱9排至大气。向冷却塔2和布袋除尘器4之间的烟道里喷入粉末状的活性炭,用于除去尾气里的重金属和二噁英等有害物质。在布袋除尘器3里,未反应的氢氧化钙和尾气中的酸性有害气体继续进行反应,进一步提高去除效率。统向冷却塔2和布袋除尘器3之间的烟道里喷入粉末状的消石灰313,使尾气中的酸性气体先与氢氧化钙反应后被吸收去除,降低湿法洗气塔的处理负荷。布袋除尘器3内的尾气温度始终保持高温(155℃以上),确保不会产生因凝结水而引起腐蚀的问题。尾气中的粉尘经过布袋过滤和在线空气清灰,掉落到布袋除尘器底部的除尘仓,由旋转 排灰阀送至其下面的尘渣输出管道309并送出。在启动时为防止布袋除尘器3低温腐蚀,设置布袋底部加热器307对布袋除尘器进行预热。In one embodiment of the utility model, when the utility model treats the tail gas, the black powder mixed in the tail gas is recovered by the cooling tower 2, and the tail gas pipeline between the cooling tower 2 and the bag filter 3 is sprayed with slaked lime 313 and activated carbon powder 314 for dry treatment, and the tail gas is preliminarily treated. The bag filter 3, the wet water scrubber 4, and the activated carbon adsorption tower 5 further purify the tail gas and discharge it to the atmosphere through the tail gas discharge chimney 9. Powdered activated carbon is sprayed into the flue between the cooling tower 2 and the bag filter 4 to remove harmful substances such as heavy metals and dioxins in the tail gas. In the bag filter 3, the unreacted calcium hydroxide and the acidic harmful gas in the tail gas continue to react, further improving the removal efficiency. Powdered slaked lime 313 is sprayed into the flue between the cooling tower 2 and the bag filter 3, so that the acidic gas in the tail gas reacts with the calcium hydroxide first and then is absorbed and removed, reducing the processing load of the wet scrubber. The exhaust gas temperature in the bag filter 3 is always kept high (above 155°C) to ensure that there will be no corrosion caused by condensed water. The dust in the exhaust gas is filtered by the bag and cleaned by online air, and then falls into the dust removal bin at the bottom of the bag filter. The dust discharge valve sends the dust to the dust output pipe 309 below it and sends it out. In order to prevent the bag filter 3 from low temperature corrosion during startup, a bag bottom heater 307 is set to preheat the bag filter.
经过除尘后的约150℃尾气经引风机,通过湿式洗气塔4下部尾气入口进入湿式洗气塔4。尾气经过洗气塔4下部的冷却部和上部的吸收减湿部。冷却液循环泵将塔底冷却液送至冷却部上方的喷嘴,向下喷入与逆流的尾气充分接触,将尾气温度降低至饱和温度60~70℃,以增强碱性液体吸收酸性气体的能力。冷却和吸收酸性气体后的尾气进入洗气塔上部的吸收减湿部。从减湿水槽来的减湿水由减湿水循环泵,经热交换器降温后,输送至吸收减湿部上方喷嘴向下喷入,均匀地经过填料床与尾气充分接触,把尾气中的水分减湿。减湿水回到减湿水槽形成循环。在吸收减湿部,尾气温度进一步降低,尾气中含水量也随之降低。这样,既防止了因水蒸气引起的烟囱9出现冒白烟的状况,又由于低温将促进碱液对酸性气体的吸收,尾气中的酸性气体浓度将进一步降低。洗气废水被导入废水处理系统。作为碱液的氢氧化钠由槽车运来,贮存在氢氧化钠储罐中。氢氧化钠稀释泵把氢氧化钠转入氢氧化钠稀释槽中,并被稀释至10%。稀释后的氢氧化钠溶液通过氢氧化钠供应泵输送至冷却液循环泵入口管道及减湿液循环泵入口管道中。由此,干法净化后没有被去除的尾气中的酸性气体与湿法洗气的氢氧化钠溶液进行充分的反应,进一步降低了浓度,得到彻底净化。After dust removal, the tail gas at about 150℃ enters the wet scrubber 4 through the exhaust gas inlet at the bottom of the wet scrubber 4 through the induced draft fan. The tail gas passes through the cooling part at the bottom of the scrubber 4 and the absorption and dehumidification part at the top. The coolant circulation pump sends the coolant at the bottom of the tower to the nozzle above the cooling part, sprays it downward to fully contact with the countercurrent tail gas, and reduces the tail gas temperature to the saturation temperature of 60-70℃ to enhance the ability of the alkaline liquid to absorb acidic gas. The tail gas after cooling and absorbing acidic gas enters the absorption and dehumidification part at the top of the scrubber. The dehumidification water from the dehumidification water tank is sent by the dehumidification water circulation pump, cooled by the heat exchanger, and then transported to the nozzle above the absorption and dehumidification part and sprayed downward, evenly passing through the packing bed and fully contacting with the tail gas, dehumidifying the water in the tail gas. The dehumidification water returns to the dehumidification water tank to form a cycle. In the absorption and dehumidification part, the tail gas temperature is further reduced, and the water content in the tail gas is also reduced accordingly. In this way, the chimney 9 caused by water vapor is prevented from emitting white smoke, and the acid gas concentration in the tail gas will be further reduced because the low temperature will promote the absorption of acid gas by alkali solution. The scrubbing wastewater is introduced into the wastewater treatment system. The sodium hydroxide as alkali solution is transported by a tanker and stored in a sodium hydroxide storage tank. The sodium hydroxide dilution pump transfers the sodium hydroxide into the sodium hydroxide dilution tank and is diluted to 10%. The diluted sodium hydroxide solution is transported to the inlet pipe of the coolant circulation pump and the inlet pipe of the dehumidifying liquid circulation pump by the sodium hydroxide supply pump. Thus, the acid gas in the tail gas that is not removed after the dry purification fully reacts with the sodium hydroxide solution of the wet scrubbing, further reducing the concentration and being thoroughly purified.
净化后的尾气经湿式洗气塔4塔顶除雾器去除水雾后,在设置在湿法洗气系统入口的尾气加热器内,与洗气入口的尾气进行热交换后, 进一步通过蒸汽加热器,使温度升高至约135℃左右(冬季原则上看不见白烟)。尾气-尾气加热器是为了提高湿法洗气后的气温,尽量减少蒸汽消耗量而设置的。After the purified tail gas is demisted by the demister at the top of the wet scrubber 4, it is heat exchanged with the tail gas at the scrubber inlet in the tail gas heater installed at the inlet of the wet scrubber system. The temperature is further raised to about 135°C by a steam heater (in principle, no white smoke is visible in winter). The tail gas-tail gas heater is set to increase the temperature after wet scrubbing and minimize steam consumption.
最后,经升温后的尾气再经过活性碳吸附装置过滤由烟囱排入大气中。Finally, the heated exhaust gas is filtered through an activated carbon adsorption device and discharged into the atmosphere through a chimney.
在本实用新型的描述中,需要理解的是,术语“纵向”、“横向”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系,仅是为了便于描述本实用新型,而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作,因此不能理解为对本实用新型的限制。In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply 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 understood as a limitation on the present invention.
以上所述的实施例仅是对本实用新型的优选方式进行描述,并非对本实用新型的范围进行限定,在不脱离本实用新型设计精神的前提下,本领域普通技术人员对本实用新型的技术方案做出的各种变形和改进,均应落入本实用新型权利要求书确定的保护范围内。 The embodiments described above are only descriptions of the preferred methods of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the protection scope determined by the claims of the present invention.

Claims (10)

  1. 一种报废动力锂电池破碎分选过程中的尾气处理系统,其特征在于,包括:工艺水箱(1);所述工艺水箱(1)用于存放工艺用水;A tail gas treatment system in a process of crushing and sorting scrapped power lithium batteries, characterized in that it comprises: a process water tank (1); the process water tank (1) is used to store process water;
    冷却塔(2);所述工艺水箱(1)为所述冷却塔(2)供水;所述冷却塔(2)用于对尾气降温,将尾气中混入的黑粉加湿沉降;Cooling tower (2); the process water tank (1) supplies water to the cooling tower (2); the cooling tower (2) is used to cool the exhaust gas and humidify and settle the black powder mixed in the exhaust gas;
    布袋除尘器(3);所述布袋除尘器(3)用于将所述冷却塔(2)输送的尾气进行布袋除尘;Bag dust collector (3); the bag dust collector (3) is used to carry out bag dust removal on the tail gas transported by the cooling tower (2);
    滤袋除尘装置(6);所述滤袋除尘装置(6)固定安装在所述布袋除尘器(3)顶部;A filter bag dust removal device (6); the filter bag dust removal device (6) is fixedly installed on the top of the bag dust collector (3);
    湿式洗气塔(4);所述湿式洗气塔(4)通过尾气加热交换器(7)与所述布袋除尘器(3)连通;所述湿式洗气塔(4)用于将所述布袋除尘器(3)内高温尾气降温除湿和吸收酸性气体;A wet scrubber (4); the wet scrubber (4) is connected to the bag filter (3) via an exhaust gas heating exchanger (7); the wet scrubber (4) is used to cool and dehumidify the high-temperature exhaust gas in the bag filter (3) and absorb acidic gases;
    活性炭吸附塔(5);用于将所述尾气加热交换器(7)内排放的尾气进行吸附过滤并将气体通过烟囱(9)排放至外界。An activated carbon adsorption tower (5) is used to adsorb and filter the tail gas discharged from the tail gas heating exchanger (7) and discharge the gas to the outside through a chimney (9).
  2. 根据权利要求1所述的一种报废动力锂电池破碎分选过程中的尾气处理系统,其特征在于:所述工艺水箱(1)连通有排水管道(101),补水管道(102)和出水管道(103);所述排水管道(101)一端连通于所述工艺水箱(1)水位线上方一侧;所述排水管道(101)另一端与外排管道(104)连通;所述补水管道(102)将所述工艺水箱(1)顶部与工业水池连通;所述出水管道(103)一端与所述工艺水箱(1)底部连通,所述出水管道(103)另一端安装有降温水泵(105);所述降温水泵(105)通过降温水出口门(106)与所述冷却塔(2) 连通。According to claim 1, a tail gas treatment system in the process of crushing and sorting scrapped power lithium batteries is characterized in that: the process water tank (1) is connected with a drainage pipe (101), a water supply pipe (102) and a water outlet pipe (103); one end of the drainage pipe (101) is connected to the side above the water level of the process water tank (1); the other end of the drainage pipe (101) is connected to an external drainage pipe (104); the water supply pipe (102) connects the top of the process water tank (1) with an industrial water pool; one end of the water outlet pipe (103) is connected to the bottom of the process water tank (1), and the other end of the water outlet pipe (103) is installed with a cooling water pump (105); the cooling water pump (105) is connected to the cooling tower (2) through a cooling water outlet door (106). Connectivity.
  3. 根据权利要求2所述的一种报废动力锂电池破碎分选过程中的尾气处理系统,其特征在于:所述冷却塔(2)连通有冷却塔尾气输送管道(201),冷却塔降温水输送管道(202),冷却塔压缩空气输送管道(203),冷却塔尾气输出管道(205)和黑粉输出管道(207);所述冷却塔尾气输送管道(201)置于所述冷却塔(2)顶部一端,将尾气导入所述冷却塔(2)内;所述冷却塔降温水输送管道(202)一端与所述降温水出口门(106)固定连接,另一端与所述冷却塔(2)顶部连通;所述冷却塔压缩空气输送管道(203)将所述冷却塔(2)顶面与压缩空气源连通;所述冷却塔尾气输出管道(205)安装所述冷却塔底部侧壁,且所述冷却塔尾气输出管道(205)与所述冷却塔(2)侧壁形成60°-62°夹角;所述黑粉输出管道(207)通过冷却塔旋转阀(206)安装于所述冷却塔(2)底面;According to claim 2, a waste power lithium battery crushing and sorting process exhaust gas treatment system is characterized in that: the cooling tower (2) is connected to a cooling tower exhaust gas delivery pipeline (201), a cooling tower cooling water delivery pipeline (202), a cooling tower compressed air delivery pipeline (203), a cooling tower exhaust gas output pipeline (205) and a black powder output pipeline (207); the cooling tower exhaust gas delivery pipeline (201) is placed at one end of the top of the cooling tower (2) to guide the exhaust gas into the cooling tower (2); the cooling tower cooling water delivery pipeline (202) is connected to the cooling tower (2) to guide the exhaust gas into the cooling tower (2); the cooling tower cooling water delivery pipeline (203 ... 02) one end is fixedly connected to the cooling water outlet door (106), and the other end is connected to the top of the cooling tower (2); the cooling tower compressed air delivery pipeline (203) connects the top surface of the cooling tower (2) with the compressed air source; the cooling tower tail gas output pipeline (205) is installed on the bottom side wall of the cooling tower, and the cooling tower tail gas output pipeline (205) and the side wall of the cooling tower (2) form an angle of 60°-62°; the black powder output pipeline (207) is installed on the bottom surface of the cooling tower (2) through a cooling tower rotary valve (206);
    所述冷却塔尾气输出管道(205)内温度保持在150℃-155℃。The temperature in the cooling tower tail gas output pipeline (205) is maintained at 150°C-155°C.
  4. 根据权利要求3所述的一种报废动力锂电池破碎分选过程中的尾气处理系统,其特征在于:所述冷却塔(2)底部还固定安装有冷却塔加热器(204);所述冷却塔(2)内腔底部还安装有冷却塔旋转刮板(208)。According to the exhaust gas treatment system in the process of crushing and sorting scrapped power lithium batteries as described in claim 3, it is characterized in that: a cooling tower heater (204) is also fixedly installed at the bottom of the cooling tower (2); and a cooling tower rotating scraper (208) is also installed at the bottom of the inner cavity of the cooling tower (2).
  5. 根据权利要求3所述的一种报废动力锂电池破碎分选过程中的尾气处理系统,其特征在于:所述布袋除尘器(3)连通有布袋除尘器尾气输送管道(301),布袋除尘器尾气输出管道(303),布袋除尘器压缩空气输送管道(308)和布袋除尘器尘渣输出管道(309); 所述布袋除尘器尾气输送管道(301)一端与所述冷却塔尾气输出管道(205)连通,另一端与所述布袋除尘器(3)中部连通,且所述布袋除尘器尾气输送管道(301)正对所述布袋除尘器(3)内的滤袋(302);所述布袋除尘器尾气输送管道(301)上还开设有用于添加消石灰粉(313)和活性炭粉(314)的干粉添加口;According to claim 3, the exhaust gas treatment system in the process of crushing and sorting scrapped power lithium batteries is characterized in that: the bag dust collector (3) is connected to a bag dust collector exhaust gas delivery pipeline (301), a bag dust collector exhaust gas output pipeline (303), a bag dust collector compressed air delivery pipeline (308) and a bag dust collector dust residue output pipeline (309); One end of the bag filter exhaust gas delivery pipeline (301) is connected to the cooling tower exhaust gas output pipeline (205), and the other end is connected to the middle of the bag filter (3), and the bag filter exhaust gas delivery pipeline (301) is directly opposite to the filter bag (302) in the bag filter (3); the bag filter exhaust gas delivery pipeline (301) is also provided with a dry powder addition port for adding slaked lime powder (313) and activated carbon powder (314);
    所述布袋除尘器尾气输出管道(303)一端与所述布袋除尘器(3)顶部一侧连通;所述布袋除尘器尾气输出管道(303)另一端安装有布袋出口挡板(304);所述布袋除尘器压缩空气输送管道(308)内通入压缩空气(311);所述压缩空气(311)还通过吹扫压缩空气输送管道(310)通入所述滤袋除尘装置(6)内;所述布袋除尘器尘渣输出管道(309)安装于所述布袋除尘器(3)底部。One end of the bag filter exhaust gas output pipe (303) is connected to one side of the top of the bag filter (3); the other end of the bag filter exhaust gas output pipe (303) is installed with a bag outlet baffle (304); compressed air (311) is introduced into the bag filter compressed air delivery pipe (308); the compressed air (311) is also introduced into the filter bag dust removal device (6) through the purge compressed air delivery pipe (310); the bag filter dust residue output pipe (309) is installed at the bottom of the bag filter (3).
  6. 根据权利要求5所述的一种报废动力锂电池破碎分选过程中的尾气处理系统,其特征在于:所述布袋除尘器(3)内腔顶部还安装有布袋除尘仓挡板(305);所述滤袋(302)下方设置有振打压缩空气装置(306);所述布袋除尘器尾气输送管道(301)和布袋除尘器尾气输出管道(303)还通过布袋加热器(307)和加热风机直接连通,用于保证尾气温度保持在155℃以上;所述布袋加热器(307)还通入有吹扫空气(312)。According to claim 5, a waste gas treatment system in the crushing and sorting process of scrapped power lithium batteries is characterized in that: a bag dust collector bin baffle (305) is also installed on the top of the inner cavity of the bag dust collector (3); a vibration compressed air device (306) is arranged below the filter bag (302); the bag dust collector exhaust gas delivery pipeline (301) and the bag dust collector exhaust gas output pipeline (303) are also directly connected to the heating fan through the bag heater (307) to ensure that the exhaust gas temperature is maintained above 155°C; the bag heater (307) is also introduced with purge air (312).
  7. 根据权利要求5所述的一种报废动力锂电池破碎分选过程中的尾气处理系统,其特征在于:所述滤袋除尘装置(6)包括脉冲气包(601)和吹气管(602);所述吹扫压缩空气输送管道(310)与所述脉冲气包(601)顶部连通;所述脉冲气包(601)底部安装有若干 根所述吹气管(602);所述吹气管(602)伸入所述布袋除尘器(3)内,且正对所述滤袋(302)设置;所述吹气管(602)上安装有若干个吹气控制阀(603)。According to claim 5, a tail gas treatment system in the process of crushing and sorting scrapped power lithium batteries is characterized in that: the filter bag dust removal device (6) includes a pulse air bag (601) and a blowing pipe (602); the purge compressed air delivery pipeline (310) is connected to the top of the pulse air bag (601); the bottom of the pulse air bag (601) is equipped with a plurality of The air blowing pipe (602) extends into the bag filter (3) and is arranged directly opposite to the filter bag (302); a plurality of air blowing control valves (603) are installed on the air blowing pipe (602).
  8. 根据权利要求5所述的一种报废动力锂电池破碎分选过程中的尾气处理系统,其特征在于:所述尾气加热交换器(7)连通有尾气升温输入管道(701),尾气升温输出管道(702),尾气加热交换器尾气输出管道(703),尾气降温输入管道(704)和尾气降温输出管道(705);所述尾气降温输入管道(704)一端安装在所述布袋出口挡板(304)上,所述尾气降温输入管道(704)另一端与所述尾气加热交换器(7)底部连通;所述尾气降温输出管道(705)一端与所述尾气加热交换器(7)底部连通,尾气降温输出管道(705)另一端与所述湿式洗气塔(4)底部连通;所述尾气升温输入管道(701)与所述湿式洗气塔(4)顶部连通;所述尾气升温输出管道(702)与所述尾气加热交换器尾气输出管道(703)和吹扫空气加热器(706)分别连通;所述尾气加热交换器尾气输出管道(703)与所述活性炭吸附塔(5)连通。According to claim 5, a waste gas treatment system in the crushing and sorting process of scrapped power lithium batteries is characterized in that: the exhaust gas heating exchanger (7) is connected to the exhaust gas heating input pipeline (701), the exhaust gas heating output pipeline (702), the exhaust gas heating exchanger exhaust gas output pipeline (703), the exhaust gas cooling input pipeline (704) and the exhaust gas cooling output pipeline (705); one end of the exhaust gas cooling input pipeline (704) is installed on the bag outlet baffle (304), and the other end of the exhaust gas cooling input pipeline (704) is connected to the exhaust gas heating exchanger ( 7) is connected to the bottom; one end of the exhaust gas cooling output pipeline (705) is connected to the bottom of the exhaust gas heating exchanger (7), and the other end of the exhaust gas cooling output pipeline (705) is connected to the bottom of the wet scrubber (4); the exhaust gas heating input pipeline (701) is connected to the top of the wet scrubber (4); the exhaust gas heating output pipeline (702) is connected to the exhaust gas heating exchanger exhaust gas output pipeline (703) and the purge air heater (706) respectively; the exhaust gas heating exchanger exhaust gas output pipeline (703) is connected to the activated carbon adsorption tower (5).
  9. 根据权利要求8所述的一种报废动力锂电池破碎分选过程中的尾气处理系统,其特征在于:所述湿式洗气塔(4)通过湿式洗气塔尾气输出管道(401)与所述尾气降温输出管道(705)连通;且所述湿式洗气塔尾气输出管道(401)上还安装有湿式洗气塔进口挡板(402);所述湿式洗气塔(4)顶部通过湿式洗气塔尾气输入管道(403)与所述尾气升温输入管道(701)连通;所述湿式洗气塔(4)顶部还 连通有减湿水输送管道(404);所述减湿水输送管道(404)下方设置有减湿水排放管道(405);所述减湿水排放管道(405)下方设置有冷却水输送管道(406);所述湿式洗气塔(4)中部连通有二次减湿水输送管道(407);所述湿式洗气塔(4)底部还连通有冷却水ph计输入管道(408)和盐度计输入水管道(409);所述湿式洗气塔(4)底部还安装有冷却水输出口(410)和冷却水放水门(411)。According to claim 8, a tail gas treatment system in the process of crushing and sorting scrapped power lithium batteries is characterized in that: the wet scrubber (4) is connected to the tail gas cooling output pipeline (705) through the wet scrubber tail gas output pipeline (401); and a wet scrubber inlet baffle (402) is also installed on the wet scrubber tail gas output pipeline (401); the top of the wet scrubber (4) is connected to the tail gas heating input pipeline (701) through the wet scrubber tail gas input pipeline (403); the top of the wet scrubber (4) is also connected to the tail gas heating input pipeline (701) through the wet scrubber tail gas input pipeline (403); A dehumidification water delivery pipeline (404) is connected; a dehumidification water discharge pipeline (405) is arranged below the dehumidification water delivery pipeline (404); a cooling water delivery pipeline (406) is arranged below the dehumidification water discharge pipeline (405); a secondary dehumidification water delivery pipeline (407) is connected to the middle of the wet scrubbing tower (4); a cooling water pH meter input pipeline (408) and a salinity meter input water pipeline (409) are also connected to the bottom of the wet scrubbing tower (4); a cooling water output port (410) and a cooling water drain gate (411) are also installed at the bottom of the wet scrubbing tower (4).
  10. 根据权利要求8所述的一种报废动力锂电池破碎分选过程中的尾气处理系统,其特征在于:所述活性炭吸附塔(5)通过热空气吹扫管道(501)和活性炭吸附塔尾气进入管道(502)与所述尾气加热交换器尾气输出管道(703)连通;所述活性炭吸附塔(5)通过活性炭吸附塔尾气输出管道(503)和引风机(504)与所述烟囱(9)连通。 According to claim 8, a tail gas treatment system in a process of crushing and sorting scrapped power lithium batteries is characterized in that: the activated carbon adsorption tower (5) is connected to the tail gas output pipeline (703) of the tail gas heating exchanger through a hot air purge pipeline (501) and an activated carbon adsorption tower tail gas inlet pipeline (502); the activated carbon adsorption tower (5) is connected to the chimney (9) through an activated carbon adsorption tower tail gas output pipeline (503) and an induced draft fan (504).
PCT/CN2023/099082 2022-10-21 2023-06-08 Tail gas treatment system in crushing and sorting process of scrapped power lithium battery WO2024082652A1 (en)

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