CN113091075A - Control method of dioxin in waste salt pyrolysis - Google Patents
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- CN113091075A CN113091075A CN202110374624.XA CN202110374624A CN113091075A CN 113091075 A CN113091075 A CN 113091075A CN 202110374624 A CN202110374624 A CN 202110374624A CN 113091075 A CN113091075 A CN 113091075A
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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
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0027—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions
- B01D46/0036—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions by adsorption or absorption
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/02—Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
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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
- B01D53/14—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 by absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
- F23J15/022—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
- F23J15/022—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow
- F23J15/025—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow using filters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
- F23J15/04—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material using washing fluids
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
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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
- B01D2257/20—Halogens or halogen compounds
- B01D2257/206—Organic halogen compounds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/30—Technologies for a more efficient combustion or heat usage
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Environmental & Geological Engineering (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses a method for controlling dioxin in waste salt pyrolysis, which comprises the following steps: the method comprises the following steps: introducing waste gas generated by pyrolysis of waste salt through a pyrolysis furnace into a secondary combustion chamber; step two: sufficient air and auxiliary fuel are introduced into a secondary combustion chamber to heat the pyrolysis gas to 1100 ℃ so that the pyrolysis gas is mixed and combusted in the secondary combustion chamber and stays for more than 2 seconds; step three: second combustion chamber burning smokeAfter the gas enters a waste heat boiler for heat recovery, the temperature of the gas is reduced to 550 ℃ from 1100 ℃, and then the gas enters a quenching tower; step four: the temperature of the flue gas is controlled to be between 500 and 220 ℃ through the quenching tower for emergency cooling. Has the advantages that: sufficient air and auxiliary fuel are introduced into the secondary combustion chamber to heat the flue gas to 1100 ℃ so that the pyrolysis gas is mixed and combusted in the secondary combustion chamber and stays for more than 2 seconds, and the harmful gas is thoroughly decomposed and combusted and is completely converted into harmless CO2And H2O and substantially destroys any dioxins and dioxin precursors that may be generated.
Description
Technical Field
The invention relates to the technical field of waste salt tail gas treatment, in particular to a method for controlling dioxin in waste salt pyrolysis.
Background
DIOXINs (DIOXINs), namely Poly Chlorinated dibenzofurans-P-DIOXINs, are abbreviated as PCDDs, the chemical structure of which is linked by one oxygen atom and is called as polychlorinated dibenzofurans (PCDFs), and linked by two oxygen atoms and is called as polychlorinated dibenzodioxins (PCDDs). Since 1-4 chlorine atoms can be substituted on each benzene ring, there are a total of 135 PCDFs and 75 PCDDs isomers. These two classes are collectively referred to as dioxins (dioxins) class of substances.
The melting point of the dioxin is 303-306 ℃; the boiling point is 421.2-446.5 ℃; the thermal decomposition temperature is 700 ℃; generally, it is stable in acid and alkali, easily decomposed by a strong oxidizing agent, and slowly decomposed by light and ultraviolet rays. Generally speaking, the volatility is low, but the environment can be polluted on a large scale in long-distance open transportation. Dioxins generated and discharged to the environment in the process of burning solid wastes are good in chemical stability in the environment and difficult to decompose, the half-life period of the dioxins is generally 5 to 10 years, and serious pollution is caused to the atmosphere, soil, rivers and the like in the environment movement.
Disclosure of Invention
The invention aims to provide a method for controlling dioxin in waste salt pyrolysis, pyrolysis flue gas generated by waste salt pyrolysis is introduced into a secondary combustion chamber and heated to over 1100 ℃, so that waste gas is fully combusted and is completely oxidized into CO2And H2O; sufficient air and auxiliary fuel are introduced into the secondary combustion chamber to heat the flue gas to 1100 ℃ so that the pyrolysis gas is mixed and combusted in the secondary combustion chamber and stays for more than 2 seconds, and the harmful gas is thoroughly decomposed and combusted and is completely converted into harmless CO2And H2O and substantially destroys any dioxins and dioxin precursors that may be generated.
The technical scheme of the invention is realized as follows:
a control method of dioxin in waste salt pyrolysis comprises the following steps:
the method comprises the following steps: introducing waste gas generated by pyrolysis of waste salt through a pyrolysis furnace into a secondary combustion chamber;
step two: sufficient air and auxiliary fuel are introduced into a secondary combustion chamber to heat the pyrolysis gas to 1100 ℃ so that the pyrolysis gas is mixed and combusted in the secondary combustion chamber and stays for more than 2 seconds;
step three: the flue gas burned in the secondary combustion chamber enters a waste heat boiler for heat recovery, the temperature of the flue gas is reduced to 550 ℃ from 1100 ℃, and then the flue gas enters a quench tower;
step four: the temperature of the flue gas is controlled to be between 500 and 220 ℃ through a quenching tower for emergency cooling;
step five: and finally, the waste gas passes through a bag-type dust collector, a precooler and a two-stage washing tower and is discharged through a flue gas heater.
And further, in the fourth step, absorbing the trace dioxin particles in the flue gas by lime micro particles in a quenching tower.
Further, in the fifth step, an activated carbon powder injection device is additionally arranged in the flue before entering the bag-type dust collector, and powdered activated carbon is periodically injected into the flue gas to form a carbon powder layer on the surface of the bag.
Further, in the fourth step, the residence time of the flue gas in the quenching tower is less than 1 s.
The invention has the beneficial effects that: after the incineration flue gas of the secondary combustion chamber enters a waste heat boiler for heat recovery, the temperature of the incineration flue gas is reduced to 550 ℃ from 1100 ℃, and then the incineration flue gas enters a quench tower. Dioxin in incineration flue gas can be mostly decomposed through good combustion control, however, resynthesis is possible under certain conditions. This project is through quench tower to flue gas temperature's control, and emergency cooling between 500 ~ 200 ℃ reduces and has avoided the dangerous temperature region of dioxin resynthesis. In the quenching tower, the micro dioxin particles in the flue gas are absorbed by the lime micro particles. In addition, an activated carbon powder injection device is additionally arranged in a flue before the flue enters a cloth bag dust removal device, powdered activated carbon is periodically injected into the flue gas to enable the activated carbon to form a carbon powder layer on the surface of a cloth bag, the carbon powder layer can be used for effectively adsorbing dioxin, theoretically, the dioxin stays for more than 2 seconds in a high-temperature state of 1100 ℃ in a flue gas combustion chamber, the dioxin is destroyed and is completely not discharged, and the activated carbon powder is matched with the cloth bag dust removal device to ensure that no dioxin is discharged. Activated carbon was added at 200mg/Nm3 flue gas dosage. In the bag filter, dioxin adsorbed on submicron particles is trapped, and the generation of dioxin is further reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a flow chart of a method for controlling dioxin in waste salt pyrolysis;
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
According to an embodiment of the invention, a method for controlling dioxin in waste salt pyrolysis is provided.
Referring to fig. 1, the method for controlling dioxin in pyrolysis of waste salt according to an embodiment of the present invention includes the steps of:
the method comprises the following steps: introducing waste gas generated by pyrolysis of waste salt through a pyrolysis furnace into a secondary combustion chamber;
step two: sufficient air and auxiliary fuel are introduced into a secondary combustion chamber to heat the pyrolysis gas to 1100 ℃ so that the pyrolysis gas is mixed and combusted in the secondary combustion chamber and stays for more than 2 seconds;
step three: the flue gas burned in the secondary combustion chamber enters a waste heat boiler for heat recovery, the temperature of the flue gas is reduced to 550 ℃ from 1100 ℃, and then the flue gas enters a quench tower;
step four: the temperature of the flue gas is controlled to be between 500 and 220 ℃ through a quenching tower for emergency cooling;
step five: and finally, the waste gas passes through a bag-type dust collector, a precooler and a two-stage washing tower and is discharged through a flue gas heater.
And further, in the fourth step, absorbing the trace dioxin particles in the flue gas by lime micro particles in a quenching tower.
Further, in the fifth step, an activated carbon powder injection device is additionally arranged in the flue before entering the bag-type dust collector, and powdered activated carbon is periodically injected into the flue gas to form a carbon powder layer on the surface of the bag.
Further, in the fourth step, the residence time of the flue gas in the quenching tower is less than 1 s.
Mechanism of generation of dioxin:
dioxin is easily formed in the incineration process, the formation mechanism is very complex, and the method is not completely clear at present. The existing research considers that the main generation routes have the following two aspects:
1) heterogeneous catalysis reaction of the precursor: the precursor generated by the incomplete combustion and the uneven catalytic reaction on the surface of the fly ash is subjected to a complex organic activity catalytic reaction to generate dioxin.
2) De novo synthesis reaction: it is expressed as being produced by a substance which is little related in chemical structure to dioxin. I.e., macromolecular carbon (commonly referred to as carbon residue) and organic or inorganic chlorine in the fly ash are catalytically produced at low temperatures (250 ℃ to 450 ℃) by catalysts (transition metals or oxides thereof) in the fly ash. At a suitable temperature, the macromolecular carbon in the fly ash particles can be oxidized to CO and CO2Aromatic compounds may also be produced by cleavage reactions. In the presence of organic or inorganic chlorine, with a very small proportion of CO and CO2Is converted into aliphatic precursor under the action of catalyst. If Al is present2O3The aliphatic precursor may also generate an aromatic precursor; the aromatic compound is subjected to chlorination reactionAn aromatic precursor is generated. These precursors react to form dioxins in the presence of a transition metal (mainly copper) as catalyst.
Control measures for dioxins:
the invention adopts a pyrolysis method rather than an incineration method. On one hand, the generation of dioxin precursors is reduced by the pyrolysis method; on the other hand, the pyrolysis process takes place in a reducing atmosphere and should not generate a catalyst that promotes the formation of dioxins. In a pyrolysis furnace: preconditions for dioxin production: organic or inorganic chlorine, oxygen, and the presence of transition metal cations. The pyrolysis process is in a reducing atmosphere, the oxygen content is lower than 1%, and the de novo synthesis reaction of the dioxin is controlled from a source. In addition, due to the oxygen-deficient environment, the generation amount of dioxin precursors is relatively reduced. In the conventional incineration process, under the action of a proper temperature and a catalyst, a plurality of chemical reactions occur, for example, the following four reactions are taken as examples:
2Cu+0.5O2＝Cu2O 3
Cu2O+2HCl＝2Cu+H2O+Cl2 4
as can be seen from reactions 1-4: the oxygen plays a promoting role in the formation of precursor chlorobenzene, and also promotes HCl to produce Cl2, so that the emission of molecular chlorine is increased, and aromatic chloro-compounds are more favorably generated. However, in a reducing atmosphere, the four reactions are difficult to carry out, so that the formation of precursor chlorobenzene is reduced, and a chlorine source is weakened.
Pyrolysis flue gas generated by pyrolysis of waste salt is introduced into a secondary combustion chamber and heated to over 1100 ℃, so that the waste gas is fully combusted and is completely oxidized into CO2And H2O; sufficient air and auxiliary fuel are introduced into the second combustion chamber to add the flue gasHeating to 1100 deg.C to make pyrolysis gas mix and burn in it and make it stay for more than 2 seconds, so that the harmful gas can be completely decomposed and burnt, and can be completely converted into harmless CO2And H2O and substantially destroys any dioxins and dioxin precursors that may be generated. The flue gas stays for more than 2 seconds in the high temperature state of 1100-1200 ℃ in the secondary combustion chamber, and the dioxin is destroyed. The high-temperature flue gas at the outlet of the secondary combustion chamber (the main components of the secondary combustion chamber comprise a barrel body which is rolled by a steel plate, and a lining is made of a corrosion-resistant and high-temperature-resistant refractory brick, a temperature measuring point, a pressure measuring point, an oxygen content measuring point, a secondary air port, a burner port, an observation port, an explosion-proof door arranged at the top of the secondary combustion chamber and an emergency discharge chimney) has heat recovery value, and a waste heat boiler is generally adopted to recover the waste heat of the flue gas and produce process steam required by the regeneration process.
After heat exchange is carried out on high-temperature flue gas exhausted from the secondary combustion chamber through a waste heat boiler, the temperature is reduced from original 1100 ℃ to about 550 ℃ and then the high-temperature flue gas enters a quenching tower, so that the residence time of the flue gas at 200-500 ℃ is reduced for reducing the chance of synthesis of dioxin, and the measure adopted is 'quenching'. The quench tower has the effect of cooling and deacidifying concurrently, adopts the spraying quench tower to cool down for tail gas, and the quenching agent adopts lime wash, can react with the acid gas in the tail gas, can effectively get rid of HCl, SOx, NOx etc. in the tail gas.
The retention time of the flue gas in the quenching tower is less than 1s, and the temperature of the flue gas discharged from the quenching tower is reduced to 220 ℃ from about 550 ℃. The flue gas after temperature reduction and deacidification enters a bag-type dust remover, the temperature of the flue gas entering the bag-type dust remover is more than 200 ℃, SO that the dewing phenomenon of the bag-type dust remover can be avoided, the flue gas after dust removal enters a wet-process deacidification system through a precooler, and SO in the flue gas2HCl and NaOH solution are further neutralized and removed.
The double dust removal design of the bag dust removal and the wet scrubber tower is adopted, a proper bag is selected, 99.9% of dust pollutants can be removed basically, the bag dust removal is the only equipment which is proved to be capable of effectively removing PM2.5 at present, and the wet scrubber tower after the bag dust removal can also collect small particles into large particles by utilizing the absorption force of water on the smoke dust, and the large particles are washed into circulating water to be discharged. Acid gas in the flue gas is subjected to acid-base neutralization reaction in the washing tower in an alkali liquor spraying mode by utilizing the wet washing tower, so that hydrogen chloride in the flue gas is removed from the flue gas, the removal efficiency of the wet washing tower can reach more than 95%, and various acid gases such as hydrogen chloride, sulfur dioxide and the like can be removed.
After the processes of quenching, dedusting, washing and purifying, the pollutants in the flue gas completely reach the emission standard, but the temperature is low, the flue gas still needs to pass through a flue gas heat exchanger to avoid dew point corrosion and white smoke generation, and the heated flue gas is sent to a chimney through a draught fan to reach the standard and then is discharged outside.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (4)
1. A control method of dioxin in waste salt pyrolysis is characterized by comprising the following steps:
the method comprises the following steps: introducing waste gas generated by pyrolysis of waste salt through a pyrolysis furnace into a secondary combustion chamber;
step two: sufficient air and auxiliary fuel are introduced into a secondary combustion chamber to heat the pyrolysis gas to 1100 ℃ so that the pyrolysis gas is mixed and combusted in the secondary combustion chamber and stays for more than 2 seconds;
step three: the flue gas burned in the secondary combustion chamber enters a waste heat boiler for heat recovery, the temperature of the flue gas is reduced to 550 ℃ from 1100 ℃, and then the flue gas enters a quench tower;
step four: the temperature of the flue gas is controlled to be between 500 and 220 ℃ through a quenching tower for emergency cooling;
step five: and finally, the waste gas passes through a bag-type dust collector, a precooler and a two-stage washing tower and is discharged through a flue gas heater.
2. The method for controlling dioxin during waste salt pyrolysis according to claim 1, characterized in that in the fourth step, trace dioxin particles in flue gas are adsorbed by lime fine particles in a quenching tower.
3. The method for controlling dioxin generated in pyrolysis of waste salt according to claim 1, characterized in that in the fifth step, an activated carbon powder injection device is additionally arranged in the flue before entering the bag-type dust remover, and powdered activated carbon is periodically injected into the flue gas to form a carbon powder layer on the surface of the bag.
4. The method for controlling dioxin generated in pyrolysis of waste salt according to claim 1, wherein in the fourth step, the retention time of the flue gas in the quenching tower is less than 1 s.
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| CN202110374624.XA CN113091075A (en) | 2021-04-08 | 2021-04-08 | Control method of dioxin in waste salt pyrolysis |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113797728A (en) * | 2021-09-30 | 2021-12-17 | 灌南县同益金属有限公司 | Treatment method for smoke generated in valuable secondary material treatment process |
| CN114100318A (en) * | 2021-11-30 | 2022-03-01 | 湖南江冶机电科技股份有限公司 | Waste gas reduction and harmless treatment method in waste lithium battery recovery process |
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| CN110201514A (en) * | 2019-05-30 | 2019-09-06 | 北京航天环境工程有限公司 | A kind of abraum salt recycling treatment exhaust treatment system and application |
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2021
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|---|---|---|---|---|
| JP2000213726A (en) * | 1999-01-20 | 2000-08-02 | Hitachi Ltd | Method and device for dioxin reduction |
| CN106468441A (en) * | 2015-08-17 | 2017-03-01 | 上海沁泽环保科技有限公司 | Doctor's useless high temperature carbonization pyrolysis high-temperature gasification burns low two English exhaust systems, method |
| CN105627335A (en) * | 2016-02-05 | 2016-06-01 | 江苏全能机电装备工程股份有限公司 | Ultra-clean treatment method for incinerated tail gas |
| CN106178892A (en) * | 2016-08-24 | 2016-12-07 | 湖南顶立科技有限公司 | Exhaust gas treating method and system are reclaimed in a kind of enamel-covered wire pyrolysis |
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| CN110201514A (en) * | 2019-05-30 | 2019-09-06 | 北京航天环境工程有限公司 | A kind of abraum salt recycling treatment exhaust treatment system and application |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113797728A (en) * | 2021-09-30 | 2021-12-17 | 灌南县同益金属有限公司 | Treatment method for smoke generated in valuable secondary material treatment process |
| CN113797728B (en) * | 2021-09-30 | 2024-05-10 | 灌南县同益金属有限公司 | Treatment method for generating smoke in valuable secondary material treatment process |
| CN114100318A (en) * | 2021-11-30 | 2022-03-01 | 湖南江冶机电科技股份有限公司 | Waste gas reduction and harmless treatment method in waste lithium battery recovery process |
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