CN111495134B - Waste gas treatment method in waste lithium ion battery recovery process - Google Patents
Waste gas treatment method in waste lithium ion battery recovery process Download PDFInfo
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- CN111495134B CN111495134B CN202010290951.2A CN202010290951A CN111495134B CN 111495134 B CN111495134 B CN 111495134B CN 202010290951 A CN202010290951 A CN 202010290951A CN 111495134 B CN111495134 B CN 111495134B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation 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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/75—Multi-step processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation 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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/38—Removing components of undefined structure
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation 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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/68—Halogens or halogen compounds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation 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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation 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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/81—Solid phase processes
- B01D53/82—Solid phase processes with stationary reactants
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/55—Compounds of silicon, phosphorus, germanium or arsenic
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2209/00—Specific waste
- F23G2209/14—Gaseous waste or fumes
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Abstract
The invention belongs to the technical field of lithium ion battery recovery, and particularly relates to a waste gas treatment method in a waste lithium ion battery recovery process, which comprises the steps of absorbing waste gas by a dry powder absorbent, and then spraying and absorbing by a solution; compared with the traditional method for treating the waste gas only by depending on the solution spray tower, the waste gas treatment method in the waste lithium ion battery recovery process provided by the invention obviously reduces the consumption of the absorption liquid in the solution spray tower and reduces the cost; meanwhile, the waste gas in the waste lithium ion battery recovery process is firstly adsorbed by the dry powder absorbent, and then the residual harmful gas components are absorbed by a solution spraying adsorption mode, so that the treatment efficiency of the waste gas is improved.
Description
Technical Field
The invention belongs to the technical field of lithium ion battery recovery, and particularly relates to a waste gas treatment method in a waste lithium ion battery recovery process.
Background
The basic components of the lithium ion battery comprise an anode, a cathode, electrolyte and a diaphragm, wherein in the specific manufacturing process, the anode material and the cathode material are respectively added with a bonding agent and an organic solvent to be stirred, pulped, uniformly mixed and coated on a copper foil and an aluminum foil which are used as current collectors, and the anode and the cathode of the lithium ion battery are manufactured after drying treatment. At present, lithium ion batteries are widely used due to excellent electrochemical performance, and although the electrochemical performance of the lithium ion batteries is relatively stable, the service life of the lithium ion batteries is still limited, so that a large amount of waste lithium ion batteries are inevitably generated.
In the prior art, the waste lithium ion battery can generate more waste gas in the recovery processing process, and if the waste gas is dissipated, the recovery production environment is polluted, and the health of recovery production workers is influenced. The main components of waste gas generated in the recovery treatment process of the waste lithium ion battery are fluoride, a phosphorus-containing compound and an organic matter; the prior treatment method is to directly carry out spray adsorption by using alkali liquor, but the treatment method needs to consume a large amount of water, and a large amount of waste water generated after spray absorption needs to be treated.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a waste gas treatment method in the waste lithium ion battery recovery process.
In order to achieve the purpose, the invention adopts the following technical scheme to realize the purpose:
a waste gas treatment method in the waste lithium ion battery recovery process comprises the steps of absorbing waste gas by a dry powder absorbent and then spraying and absorbing by a solution.
Under the preferable condition, the dry powder absorbent is alkaline pure dry powder or alkaline wet-mixed dry powder.
Under the preferable conditions, the water content of the alkaline wet-mixed dry powder is 3-8%.
Preferably, the dry powder absorbent comprises one or more of calcium hydroxide, calcium oxide, sodium carbonate and sodium bicarbonate.
Under the preferred condition, the absorption liquid used for the solution spraying absorption is 5 wt.% alkali liquor.
Compared with the prior art, the invention has the following technical effects:
compared with the traditional method for treating the waste gas only by depending on the solution spray tower, the waste gas treatment method in the waste lithium ion battery recovery process provided by the invention obviously reduces the consumption of the absorption liquid in the solution spray tower and reduces the cost; meanwhile, the waste gas in the waste lithium ion battery recovery process is firstly adsorbed by the dry powder absorbent, and then the residual harmful gas components are absorbed by a solution adsorption mode, so that the treatment efficiency of the waste gas is improved.
Drawings
FIG. 1 illustrates a schematic view of an exhaust treatment device provided in accordance with an embodiment of the present invention;
FIG. 2 is an enlarged schematic view of position A of FIG. 1;
the reference numbers in the figures illustrate: 10-an adsorption tower, 101-an isolation cavity, 11-a first isolation plate, 12-a second isolation plate, 121-a support rod, 13-an air inlet pipe, 14-an air outlet pipe, 141-an axial flow fan, 15-a feed inlet, 16-a discharge outlet, 17-a liquid discharge pipe, 20-a filter cartridge, 30-a spraying unit, 40-a driving motor, 41-a rotating shaft, 42-a cross rod, 43-a stirring rod and 50-a sieve plate.
Detailed Description
In order to make the technical means, the creation features, the achievement purposes and the effects of the invention easy to understand, the invention is further clarified below by combining the specific drawings and the embodiments.
All the raw materials in the present invention, the sources of which are not particularly limited, may be purchased commercially or prepared according to conventional methods well known to those skilled in the art. All the raw materials used in the present invention are not particularly limited in purity, and the present invention preferably employs a purity which is conventional in the field of analytical purification or composite materials.
The invention provides a waste gas treatment method in a waste lithium ion battery recovery process, which comprises the steps of absorbing waste gas by a dry powder absorbent and then spraying and absorbing by a solution. Compared with the traditional method which only depends on the solution spray tower to treat the waste gas, the treatment method provided by the invention obviously reduces the consumption of the absorption liquid in the solution spray tower and reduces the cost; meanwhile, the waste gas in the waste lithium ion battery recovery process is firstly adsorbed by the dry powder absorbent, and then the residual harmful gas components are absorbed by a solution adsorption mode, so that the treatment efficiency of the waste gas is improved.
Further, according to the method of the present invention, the dry powder absorbent is alkaline pure dry powder or alkaline wet-mixed dry powder.
Further, the water content of the alkaline wet-mixed dry powder is 3-8%.
According to the method, the main components of the waste gas in the waste lithium ion battery recovery process are fluoride, phosphorus-containing compound and organic matter, the alkaline pure dry powder or the alkaline wet-mixed dry powder reacts with the main components in the waste gas to adsorb and remove harmful substances in the waste gas, so that the harmful gas components in the waste gas are reduced, and then the residual harmful components in the waste gas are further absorbed by the solution spray tower, so that the waste gas can reach the standard and be discharged. Preferably, the dry powder absorbent comprises one or a mixture of more than one of calcium hydroxide, calcium oxide, sodium carbonate and sodium bicarbonate.
According to the method of the present invention, in the present invention, harmful components contained in the exhaust gas are removed by alkali liquor spraying during the solution spraying, and preferably, the absorption liquid used for absorption by the solution spraying is 5 wt.% alkali liquor. The alkali solution can be used as is commonly used by those skilled in the art, and specific examples thereof include sodium hydroxide solution and potassium hydroxide solution.
As shown in fig. 1 and 2, the present invention further provides an exhaust gas treatment device for a waste lithium ion battery recovery process, specifically, the exhaust gas treatment device includes an adsorption tower 10, a filter cartridge 20, a stirring unit and a spraying unit 30, wherein an annular first isolation plate 11 is disposed at an upper half portion of the adsorption tower 10, a second isolation plate 12 extends upward from an inner edge of the first isolation plate 11, and the first isolation plate 11, the second isolation plate 12 and an inner wall of the adsorption tower 10 enclose and form an isolation chamber 101 with an opening pointing upward; the filter cartridge 20 is inversely inserted into the isolation chamber 101, and a plurality of support rods 121 arranged at intervals are arranged between the cartridge wall of the filter cartridge 20 and the plate body of the second isolation plate 12; the stirring unit is arranged in the isolation cavity 101 between the wall of the filter cartridge 20 and the inner wall of the adsorption tower 10 and is used for stirring the dry powder absorbent filled in the isolation cavity 101; the spraying unit 30 is disposed in the lower half of the adsorption tower 10, and the spraying direction of the spraying unit 30 is toward the inner side of the second partition plate 12.
In a specific working process, waste gas to be treated enters the isolation cavity 101 through the gas inlet pipe 13 at the top of the adsorption tower 10, is absorbed once through the dry powder absorbent filled in the isolation cavity 101, then enters the inner side of the second isolation plate 12 through the filter cartridge 20, alkali liquor sprayed by the spraying unit 30 arranged in the tower body at the lower half part of the adsorption tower 10 performs secondary spraying and adsorption on the waste gas, and then the waste gas is led out through the gas outlet pipe 14 arranged at the lower half part of the adsorption tower 10.
The waste gas treatment device provided by the invention realizes the efficient and reliable adsorption treatment of waste gas in the waste lithium ion battery recovery process, avoids the problems that a large amount of water resources are consumed in the traditional alkali liquor spraying treatment and the waste water treatment is difficult, and reduces the treatment cost.
Further, according to the exhaust gas treatment device provided by the present invention, the stirring unit includes a driving motor 40 disposed at the top of the adsorption tower 10, an output shaft of the driving motor 40 is in transmission connection with a rotating shaft 41 which extends downward, the rotating shaft 41 is provided with a plurality of cross rods 42 which are arranged at intervals, a stirring rod 43 extends downward from a suspension end of the cross rods 42, and the stirring rod 43 is inserted into the isolation cavity 101 between the cylinder wall of the filter cylinder 20 and the inner wall of the adsorption tower 10; when the driving motor 40 drives the rotating shaft 41 to rotate, the stirring rod 43 is driven to stir the dry powder absorbent filled in the isolation cavity 101, so that the dry powder absorbent can fully adsorb harmful ingredients in the exhaust gas, the consistency of adsorption of the dry powder absorbent filled in the isolation cavity 101 in the vertical direction can be ensured, and the problem that the dry powder absorbent at the uppermost layer is saturated and adsorbed but the dry powder absorbent at the bottom layer is not adsorbed is avoided; in addition, through the stirring processing of this stirring unit, the through efficiency of waste gas has been improved.
Further, according to the invention, in order to improve the stirring efficiency of the stirring rod 43 for the dry powder adsorbent, a thread structure is arranged on the rod body of the stirring rod 43. Further, in order to ensure stability during rotation of the rotation shaft 41, the lower end of the rotation shaft 41 is disposed at the bottom of the filter cartridge 20 via a bearing.
In the waste gas treatment device provided by the invention, the upper part of the adsorption tower 10 is provided with a feed inlet 15 for supplementing a dry powder adsorbent into the isolation cavity 101, the side wall of the adsorption tower 10 is provided with a discharge outlet 16 for leading out the saturated dry powder adsorbent in the isolation cavity 101, specifically, when the saturated dry powder adsorbent needs to be led out, a valve of the discharge outlet 16 is opened, a driving motor 40 of the stirring unit is started, and the saturated dry powder adsorbent continuously gushes out from the discharge outlet 16 in the stirring process.
Further, according to the present invention, a liquid discharge pipe 17 is disposed at the bottom of the adsorption tower 10 for discharging the alkali solution adsorbed with the harmful exhaust gas components for further harmless treatment.
Further, according to the present invention, in order to improve the moving efficiency of the exhaust gas in the adsorption tower 10, the outlet pipe 14 is provided with an axial flow fan 141, and a negative pressure is generated in the lower half of the adsorption tower 10 by the axial flow fan 141, so that the exhaust gas in the upper half can more easily penetrate through the dry powder adsorbent and enter into the tower body in the lower half.
Further, according to the present invention, a sieve plate 50 is disposed on the inner side of the second isolation plate 12, and the alkali solution sprayed from the spraying unit 30 disposed in the lower half tower body of the adsorption tower 10 impacts on the sieve plate 50, such that the adsorption effect of the alkali solution on the harmful components in the exhaust gas is improved.
The waste gas treatment device provided by the invention can conveniently adsorb waste gas generated in the recovery process of the waste lithium ion battery, so that the problem that harmful substances in the waste gas are dissipated to pollute the production environment and the problem that fluoride with high content in the waste gas corrodes an RTO furnace is avoided. In addition, the waste gas treatment device provided by the invention integrates solid particle adsorption and spray adsorption, can obtain waste gas reaching the treatment standard by once introduction and once export, is simple and convenient, obviously reduces the cost of traditional waste gas treatment, and has a better application prospect.
The method for treating waste gas in the recovery process of waste lithium ion batteries provided by the invention is further explained by specific examples.
Example 1
In this embodiment, the flow rate of the exhaust gas is controlled to 1000m3The waste gas is mainly organic matter, fluoride and phosphorus-containing compound, wherein the atomic ratio of F: p is 5: 1; fully incinerating waste gas by an incinerator to remove organic matters, and filling 2m into an isolation cavity of the waste gas treatment device provided by the invention3The dry powder adsorbent is calcium hydroxide; the alkali liquor of the spraying unit positioned at the lower half part of the adsorption tower adopts 5 wt.% sodium hydroxide solution;
through the detection, the concentration of fluorine of waste gas is reduced by 92% and the concentration of phosphorus is reduced by 99% after passing through the isolation cavity, and then the waste gas is discharged after being sprayed and treated by the spraying unit at the lower half part of the adsorption tower, compared with the traditional alkali liquor spraying treatment scheme, the alkali liquor used for spraying is saved by 95%.
The foregoing shows and describes the general principles, essential features, and inventive features of this invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (5)
1. A waste gas treatment method in the recovery process of waste lithium ion batteries is characterized by comprising the steps of absorbing waste gas by a dry powder absorbent and then spraying and absorbing the waste gas by a solution;
the device for treating the waste gas comprises an adsorption tower (10), a filter cylinder (20), a stirring unit and a spraying unit (30), wherein an annular first partition plate (11) is arranged at the upper half part of the adsorption tower (10), a second partition plate (12) extends upwards from the inner edge of the first partition plate (11), and the first partition plate (11), the second partition plate (12) and the inner wall of the adsorption tower (10) are enclosed to form an isolation cavity (101) with an opening pointing upwards; the filter cartridge (20) is inversely inserted into the isolation cavity (101), and a plurality of support rods (121) which are arranged at intervals are arranged between the cartridge wall of the filter cartridge (20) and the plate body of the second isolation plate (12); the stirring unit is arranged in an isolation cavity (101) between the wall of the filter cartridge (20) and the inner wall of the adsorption tower (10) and is used for stirring the dry powder absorbent filled in the isolation cavity (101); the spraying unit (30) is arranged in the lower half tower body of the adsorption tower (10), and the spraying direction of the spraying unit (30) faces to the inner side of the second partition plate (12);
the inner side of the second isolation plate (12) is provided with a sieve plate (50), and alkali liquor sprayed by a spraying unit (30) arranged in the lower half tower body of the adsorption tower (10) impacts on the sieve plate (50).
2. The method of claim 1, wherein the dry powder absorbent is an alkaline neat dry powder or an alkaline wet-mixed dry powder.
3. The method as claimed in claim 2, wherein the water content of the alkaline-mixed wet dry powder is 3-8%.
4. The method according to claim 1, wherein the dry powder absorbent comprises one or more of calcium hydroxide, calcium oxide, sodium carbonate, and sodium bicarbonate.
5. The method according to claim 1, wherein the absorption liquid used for the solution spraying absorption is 5 wt.% alkali liquor.
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| CN202010290951.2A CN111495134B (en) | 2020-04-14 | 2020-04-14 | Waste gas treatment method in waste lithium ion battery recovery process |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103611399A (en) * | 2013-12-04 | 2014-03-05 | 无锡雪浪环境科技股份有限公司 | Purification system for flue gas generated in hazardous waste incineration |
| CN206262335U (en) * | 2016-11-28 | 2017-06-20 | 四会市伟祺玻璃建材有限公司 | A kind of waste gas purification apparatus for producing glass Mosaic |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102225302A (en) * | 2011-03-25 | 2011-10-26 | 浙江菲达脱硫工程有限公司 | System and method for purifying tail gas of medical waste incineration |
| US9701602B2 (en) * | 2013-02-26 | 2017-07-11 | Kellogg Brown & Root Llc | Emissions control of spent air from cumene oxidation |
| CN203605242U (en) * | 2013-12-03 | 2014-05-21 | 湖南邦普循环科技有限公司 | System for treating waste gas generated by waste lithium-ion battery |
| CN106139848B (en) * | 2016-08-02 | 2019-08-02 | 成都华西堂环保科技有限公司 | A kind of flue gas pollutant purification process |
| CN109569228A (en) * | 2018-12-26 | 2019-04-05 | 浙江大维高新技术股份有限公司 | The exhaust system and technique of flue gas of garbage furnace |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103611399A (en) * | 2013-12-04 | 2014-03-05 | 无锡雪浪环境科技股份有限公司 | Purification system for flue gas generated in hazardous waste incineration |
| CN206262335U (en) * | 2016-11-28 | 2017-06-20 | 四会市伟祺玻璃建材有限公司 | A kind of waste gas purification apparatus for producing glass Mosaic |
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Address after: 236500 No. 5, South Side of Huaxin Avenue, Tianying Industrial Park, Jieshou City, Fuyang City, Anhui Province Patentee after: ANHUI NANDU HUABO NEW MATERIAL TECHNOLOGY Co.,Ltd. Patentee after: Huayu New Energy Technology Co.,Ltd. Address before: 236500 No. 5, South Side of Huaxin Avenue, Tianying Industrial Park, Jieshou City, Fuyang City, Anhui Province Patentee before: ANHUI NANDU HUABO NEW MATERIAL TECHNOLOGY Co.,Ltd. Patentee before: JIESHOU NANDU HUAYU POWER SOURCE Co.,Ltd. |
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Effective date of registration: 20230526 Address after: 236500 No. 5, South Side of Huaxin Avenue, Tianying Industrial Park, Jieshou City, Fuyang City, Anhui Province Patentee after: ANHUI NANDU HUABO NEW MATERIAL TECHNOLOGY Co.,Ltd. Address before: 236500 No. 5, South Side of Huaxin Avenue, Tianying Industrial Park, Jieshou City, Fuyang City, Anhui Province Patentee before: ANHUI NANDU HUABO NEW MATERIAL TECHNOLOGY Co.,Ltd. Patentee before: Huayu New Energy Technology Co.,Ltd. |