CN109915841A - A kind of minimizing technology of organic exhaust gas - Google Patents
A kind of minimizing technology of organic exhaust gas Download PDFInfo
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- CN109915841A CN109915841A CN201910162298.9A CN201910162298A CN109915841A CN 109915841 A CN109915841 A CN 109915841A CN 201910162298 A CN201910162298 A CN 201910162298A CN 109915841 A CN109915841 A CN 109915841A
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- organic
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- 238000005516 engineering process Methods 0.000 title claims abstract description 18
- 239000007789 gas Substances 0.000 claims abstract description 101
- 238000002485 combustion reaction Methods 0.000 claims abstract description 51
- 239000000126 substance Substances 0.000 claims abstract description 28
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 25
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims abstract description 25
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 claims abstract description 25
- 229910000041 hydrogen chloride Inorganic materials 0.000 claims abstract description 25
- 238000001179 sorption measurement Methods 0.000 claims abstract description 20
- 230000015556 catabolic process Effects 0.000 claims abstract description 13
- 238000006731 degradation reaction Methods 0.000 claims abstract description 13
- 239000000463 material Substances 0.000 claims abstract description 13
- 230000001473 noxious effect Effects 0.000 claims abstract description 13
- YZCKVEUIGOORGS-IGMARMGPSA-N Protium Chemical compound [1H] YZCKVEUIGOORGS-IGMARMGPSA-N 0.000 claims abstract description 11
- 238000010521 absorption reaction Methods 0.000 claims abstract description 11
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 11
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims abstract description 9
- 125000001246 bromo group Chemical group Br* 0.000 claims abstract description 9
- 239000005416 organic matter Substances 0.000 claims abstract description 9
- 150000004945 aromatic hydrocarbons Chemical class 0.000 claims abstract description 8
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000000460 chlorine Substances 0.000 claims abstract description 7
- 229910052801 chlorine Inorganic materials 0.000 claims abstract description 7
- 244000005700 microbiome Species 0.000 claims abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 4
- HGUFODBRKLSHSI-UHFFFAOYSA-N 2,3,7,8-tetrachloro-dibenzo-p-dioxin Chemical compound O1C2=CC(Cl)=C(Cl)C=C2OC2=C1C=C(Cl)C(Cl)=C2 HGUFODBRKLSHSI-UHFFFAOYSA-N 0.000 claims abstract 4
- 230000005684 electric field Effects 0.000 claims description 12
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 10
- 239000003546 flue gas Substances 0.000 claims description 10
- 241000264877 Hippospongia communis Species 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 230000000813 microbial effect Effects 0.000 claims description 7
- 230000000185 dioxinlike effect Effects 0.000 claims description 6
- 239000008187 granular material Substances 0.000 claims description 4
- 210000000440 neutrophil Anatomy 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 3
- 210000001367 artery Anatomy 0.000 claims description 2
- 238000002347 injection Methods 0.000 claims description 2
- 239000007924 injection Substances 0.000 claims description 2
- 210000003462 vein Anatomy 0.000 claims description 2
- 230000005611 electricity Effects 0.000 claims 1
- 239000003518 caustics Substances 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 18
- KVGZZAHHUNAVKZ-UHFFFAOYSA-N 1,4-Dioxin Chemical compound O1C=COC=C1 KVGZZAHHUNAVKZ-UHFFFAOYSA-N 0.000 description 11
- 239000012855 volatile organic compound Substances 0.000 description 5
- 239000003610 charcoal Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000002912 waste gas Substances 0.000 description 2
- 238000011953 bioanalysis Methods 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 238000005660 chlorination reaction Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Classifications
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Landscapes
- Treating Waste Gases (AREA)
Abstract
The invention discloses a kind of minimizing technologies of organic exhaust gas, have following steps: (1) organic exhaust gas burning in combustion furnace and carry out efficiently quickly removal to organic exhaust gas；(2) hydrogen chloride that organic exhaust gas burning generates is mixed with hot water and steam generates hydrogen radical ion and chloride ion, and absorption processing is carried out under Electro-pulsing Field, removes the hydrogen chloride in removing exhaust gas；(3) dioxin that organic exhaust gas burning generates carries out degradation treatment by microorganism；(4) pass through Step 2: step 3 treated that combustion product gases are further passed through in activated carbon adsorption layer, other are adsorbed without electrical noxious materials by active carbon and is emitted into external environment.The present invention has the beneficial effect that can be quickly cleaned organic exhaust gas while avoid noxious material, corrosive substance outlet, is mainly used for the quick removal containing chlorine, bromo organic matter and aromatic hydrocarbon substance organic exhaust gas.
Description
Technical field
The present invention relates to waste gas purification technical field, specifically a kind of minimizing technology of organic exhaust gas.
Background technique
Volatile organic contaminant (volatile organic compounds, VOCs) is a kind of important atmosphere pollution
Object, the ratio for accounting for atmosphere pollution are constantly expanding, are getting worse to the harm of the mankind and ecological environment, caused the public
Common concern, thus various countries formulated a series of stringent laws and rules control VOCs discharge.
Currently, the method for processing VOCs has many physical treatment methods (charcoal absorption, absorption process, condensation method, UF membrane skill
Art), chemical method (thermal oxide, catalysis burning, biological oxidation, plasma method, corona method, ultraviolet catalytic oxidation method etc.) and
Biological treatment, treatment effect is bad in practical applications for first two method, higher cost, thus is restricted.And bioanalysis
It is considered as a kind of economical and effective, the method for environmental-friendly and stable performance processing VOCs.
Dioxin object is easily generated when in organic exhaust gas containing containing chlorine, bromo organic matter and aromatic hydrocarbon substance
Matter is especially burned and is more also easy to produce in starting and closing process；Chlorination can be generated when containing chlorinatedorganic in organic exhaust gas
The etching problem of hydrogen, especially the corrosive nature of hydrogen chloride greatly enhances under high temperature environment.
Summary of the invention
Aiming at the defects existing in the prior art, it is an object of the present invention to provide one kind can quickly clean it is organic
Exhaust gas avoids the voc_s removal method of noxious material, corrosive substance outlet simultaneously.
Present invention technical solution used for the above purpose is: a kind of minimizing technology of organic exhaust gas, feature
It is that there are following steps:
Step 1: organic exhaust gas burning is handled:
By the unified collection of the organic exhaust gas generated in production process, and it is passed through in combustion furnace and burns to organic exhaust gas,
Puff prot is set in the combustion furnace and is connected to force (forcing) pump on puff prot, organic exhaust gas is pressurizeed by force (forcing) pump from the spray
Port-injection is to combustion furnace, and the output power by controlling force (forcing) pump controls the discharge amount of organic exhaust gas, to organic
The heat generated during waste gas burning is used as heat source；
Step 2: the processing of hydrogen chloride product:
When in the step 1 by containing chlorinatedorganic in combustion furnace burning organic exhaust gas, fired in the combustion furnace
Burning can generate hydrogen chloride, and the exhaust gas containing hydrogen chloride that combustion furnace burning generates is sufficiently mixed with vapor, generates hydrogen radical
Ion and chloride ion, and be passed into impulse electric field, by impulse electric field by hydrogen radical ion therein and chloride ion and its
He carries out absorption processing by charged particle, removes the hydrogen chloride in removing exhaust gas；
Step 3: the processing of dioxin-like chemical:
It can be produced when in the step 1 by combustion furnace burning organic exhaust gas containing chlorine, bromo organic matter and aromatic hydrocarbon substance
Raw dioxin-like chemical, after the exhaust gas containing dioxin substance that combustion furnace burning generates is carried out cooling processing, by micro-
Biology carries out degradation treatment, and the dioxin substance of generation is carried out microbial degradation, removes the dioxin generated in combustion process
Substance；
Step 4: active carbon handles remaining noxious material:
By it is described Step 2: step 3 treated that combustion product gases are further passed through in activated carbon adsorption layer, pass through work
Property charcoal other are adsorbed without electrical noxious materials, the flue gas after the completion of adsorbing reaches discharge standard and is emitted into external
In environment.
In organic exhaust gas in the step 1 if only containing chlorinatedorganic without organic matter containing bromo and aromatic hydrocarbons
When substance, minimizing technology by the way of step 4 using Step 1: Step 2: be removed.
Guarantee to carry out at normal temperature during the collection to organic exhaust gas in the step 1, is collecting organic exhaust gas
Install antiknock device additional in the process.
Vapor used in the step 2 is that the heat for generating combustion furnace burning organic exhaust gas adds water
Heat is to fluidized state vapor generated.
The discharge inception voltage of impulse electric field is set as 25kV in the step 2, and the waveform valley of pulse voltage is set as
30kV, peak impulse voltage are set as 60kV, and pulse width is set as 200ns, repetition rate 50Hz.
Activated carbon adsorption layer is honey comb structure in the step 4, and attachment is active inside each group hole of honeycomb structure
Charcoal is removed and is taken in flue gas by step 2 or step 3 treated flue gas from one end of adsorption layer to other end steady flow
The neutrophil granule of band.
The hole diameter of the honeycomb structure of the adsorption layer is set as 1-5cm, the whole cylindrical knot of the adsorption layer
Structure and its diameter are set as 25-50cm, and the thickness of the adsorption layer is set as 0.5-2.5m.
The heat that combustion furnace burning organic exhaust gas generates in the step 1 is used as heat source, the production heated to needs
Process is heated.
Beneficial effects of the present invention: it is carried out at absorption by the hydrogen chloride gas that step 2 generates organic exhaust gas burning
Hydrogen radical ion therein and chloride ion and other charged particles are carried out absorption processing by impulse electric field, remove removing exhaust gas by reason
In hydrogen chloride, avoid hydrogen chloride outlet influence environment；By step 3 to organic exhaust gas burning generate dioxin substance into
Row microbial degradation processing carries out degradation treatment by microorganism, and the dioxin substance of generation is carried out microbial degradation, removal
The dioxin-like chemical generated in combustion process；It is achieved in and burning processing is carried out efficiently to clear up organic exhaust gas to organic exhaust gas
The outlet of noxious material and corrosive substance is avoided simultaneously.
Specific embodiment
The technical scheme in the embodiments of the invention will be clearly and completely described below, it is clear that described implementation
Example is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field is common
Technical staff's every other embodiment obtained without making creative work belongs to the model that the present invention protects
It encloses.
Embodiment 1
A kind of minimizing technology of organic exhaust gas, which is characterized in that there are following steps:
Step 1: organic exhaust gas burning is handled:
By the unified collection of the organic exhaust gas generated in production process, and it is passed through in combustion furnace and burns to organic exhaust gas,
Puff prot is set in combustion furnace and is connected to force (forcing) pump on puff prot, organic exhaust gas is pressurizeed by force (forcing) pump to be sprayed from puff prot
To combustion furnace, the output power by controlling force (forcing) pump controls the discharge amount of organic exhaust gas, burns to organic exhaust gas
The heat generated in the process is used as heat source；
Step 2: the processing of hydrogen chloride product:
When in step 1 by containing chlorinatedorganic in combustion furnace burning organic exhaust gas, it can be generated in combustion furnace burning
The exhaust gas containing hydrogen chloride that combustion furnace burning generates is sufficiently mixed with vapor, generates hydrogen radical ion and chlorine by hydrogen chloride
Ion, and being passed into impulse electric field, by impulse electric field by hydrogen radical ion therein and chloride ion and other electrifications
Grain carries out absorption processing, removes the hydrogen chloride in removing exhaust gas；
Step 3: the processing of dioxin-like chemical:
Two can be generated when in step 1 by combustion furnace burning organic exhaust gas containing chlorine, bromo organic matter and aromatic hydrocarbon substance
English substance is disliked, after the exhaust gas containing dioxin substance that combustion furnace burning generates is carried out cooling processing, passes through microorganism
Degradation treatment is carried out, the dioxin substance of generation is subjected to microbial degradation, removes the dioxin object generated in combustion process
Matter；
Step 4: active carbon handles remaining noxious material:
By Step 2: step 3 treated that combustion product gases are further passed through in activated carbon adsorption layer, pass through active carbon
Other are adsorbed without electrical noxious material, the flue gas after the completion of adsorbing reaches discharge standard and is emitted into external environment
In.
In the present invention, in the organic exhaust gas in step 1 if only containing chlorinatedorganic without organic matter containing bromo and virtue
When hydrocarbons, minimizing technology by the way of step 4 using Step 1: Step 2: be removed；
Guarantee to carry out at normal temperature during the collection to organic exhaust gas in step 1, in the process for collecting organic exhaust gas
Middle installation antiknock device, avoid organic exhaust gas is collected and combustion process in occur explosive incident generation；
Vapor used in step 2 is that the heat for generating combustion furnace burning organic exhaust gas is heated to water
Fluidized state vapor generated, the heat that organic exhaust gas generates that can burn to combustion furnace efficiently use；
The discharge inception voltage of impulse electric field is set as 25kV in step 2, and the waveform valley of pulse voltage is set as 30kV, arteries and veins
It rushes crest voltage and is set as 60kV, pulse width is set as 200ns, repetition rate 50Hz；
Activated carbon adsorption layer is honey comb structure in step 4, is attached with active carbon inside each group hole of honeycomb structure,
By step 2 or step 3 treated flue gas from one end of adsorption layer to other end steady flow, removes and carried in flue gas
Neutrophil granule guarantees that neutrophil granule is fast and efficiently removed；
The hole diameter of the honeycomb structure of adsorption layer is set as 1-5cm, adsorption layer integrally cylindrical structure and its diameter
It is set as 25-50cm, the thickness of adsorption layer is set as 0.5-2.5m；
The heat that combustion furnace burning organic exhaust gas generates in step 1 is used as heat source, the production process heated to needs
It is heated, the heat that organic exhaust gas generates that can burn to combustion furnace efficiently uses.
Embodiment 2
A kind of minimizing technology of organic exhaust gas, which is characterized in that when in organic exhaust gas if only containing chlorinatedorganic and
When without bromo organic matter with aromatic hydrocarbon substance, there are following steps:
Step 1: organic exhaust gas burning is handled:
By the unified collection of the organic exhaust gas generated in production process, and it is passed through in combustion furnace and burns to organic exhaust gas,
Puff prot is set in combustion furnace and is connected to force (forcing) pump on puff prot, organic exhaust gas is pressurizeed by force (forcing) pump to be sprayed from puff prot
To combustion furnace, the output power by controlling force (forcing) pump controls the discharge amount of organic exhaust gas, burns to organic exhaust gas
The heat generated in the process is used as heat source；
Step 2: the processing of hydrogen chloride product:
When in step 1 by containing chlorinatedorganic in combustion furnace burning organic exhaust gas, it can be generated in combustion furnace burning
The exhaust gas containing hydrogen chloride that combustion furnace burning generates is sufficiently mixed with vapor, generates hydrogen radical ion and chlorine by hydrogen chloride
Ion, and being passed into impulse electric field, by impulse electric field by hydrogen radical ion therein and chloride ion and other electrifications
Grain carries out absorption processing, removes the hydrogen chloride in removing exhaust gas；
Step 3: active carbon handles remaining noxious material:
By step 2, treated that combustion product gases are further passed through in activated carbon adsorption layer, by active carbon to other not
It is adsorbed containing electrical noxious material, the flue gas after the completion of adsorbing reaches discharge standard and is emitted into external environment.
Embodiment 3
The beneficial effects of the present invention are: being carried out at absorption by the hydrogen chloride gas that step 2 generates organic exhaust gas burning
Hydrogen radical ion therein and chloride ion and other charged particles are carried out absorption processing by impulse electric field, remove removing exhaust gas by reason
In hydrogen chloride, avoid hydrogen chloride outlet influence environment；By step 3 to organic exhaust gas burning generate dioxin substance into
Row microbial degradation processing carries out degradation treatment by microorganism, and the dioxin substance of generation is carried out microbial degradation, removal
The dioxin-like chemical generated in combustion process；It is achieved in and burning processing is carried out efficiently to clear up organic exhaust gas to organic exhaust gas
The outlet of noxious material and corrosive substance is avoided simultaneously.
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie
In the case where without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Benefit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent elements of the claims
Variation is included within the present invention.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
The other embodiments being understood that.
Claims (8)
1. a kind of minimizing technology of organic exhaust gas, which is characterized in that have following steps:
Step 1: organic exhaust gas burning is handled:
By the unified collection of the organic exhaust gas generated in production process, and it is passed through in combustion furnace and burns to organic exhaust gas, it is described
Puff prot is set in combustion furnace and is connected to force (forcing) pump on puff prot, organic exhaust gas is pressurizeed by force (forcing) pump from the puff prot
Injection is to combustion furnace, and the output power by controlling force (forcing) pump controls the discharge amount of organic exhaust gas, to organic exhaust gas
The heat generated in combustion process is used as heat source；
Step 2: the processing of hydrogen chloride product:
When in the step 1 by containing chlorinatedorganic in combustion furnace burning organic exhaust gas, in combustion furnace burning meeting
Hydrogen chloride is generated, the exhaust gas containing hydrogen chloride that combustion furnace burning generates is sufficiently mixed with vapor, generates hydrogen radical ion
It with chloride ion, and is passed into impulse electric field, by impulse electric field by hydrogen radical ion therein and chloride ion and other bands
Electric particle carries out absorption processing, removes the hydrogen chloride in removing exhaust gas；
Step 3: the processing of dioxin-like chemical:
Two can be generated when in the step 1 by combustion furnace burning organic exhaust gas containing chlorine, bromo organic matter and aromatic hydrocarbon substance
English substance is disliked, after the exhaust gas containing dioxin substance that combustion furnace burning generates is carried out cooling processing, passes through microorganism
Degradation treatment is carried out, the dioxin substance of generation is subjected to microbial degradation, removes the dioxin object generated in combustion process
Matter；
Step 4: active carbon handles remaining noxious material:
By it is described Step 2: step 3 treated that combustion product gases are further passed through in activated carbon adsorption layer, pass through active carbon
Other are adsorbed without electrical noxious material, the flue gas after the completion of adsorbing reaches discharge standard and is emitted into external environment
In.
2. a kind of minimizing technology of organic exhaust gas according to claim 1, it is characterised in that: organic in the step 1
If minimizing technology uses step when only containing chlorinatedorganic without organic matter containing bromo and aromatic hydrocarbon substance in exhaust gas
One, Step 2: the mode of step 4 is removed.
3. a kind of minimizing technology of organic exhaust gas according to claim 1, it is characterised in that: to having in the step 1
Guarantee to carry out at normal temperature during the collection of machine exhaust gas, installs antiknock device additional during collecting organic exhaust gas.
4. a kind of minimizing technology of organic exhaust gas according to claim 1, it is characterised in that: used in the step 2
Vapor be by combustion furnace burning organic exhaust gas generate heat water is carried out to be heated to fluidized state vapor generated.
5. a kind of minimizing technology of organic exhaust gas according to claim 1, it is characterised in that: pulse electricity in the step 2
The discharge inception voltage of field is set as 25kV, and the waveform valley of pulse voltage is set as 30kV, and peak impulse voltage is set as 60kV, arteries and veins
It rushes width and is set as 200ns, repetition rate 50Hz.
6. a kind of minimizing technology of organic exhaust gas according to claim 1, it is characterised in that: active carbon in the step 4
Adsorption layer is honey comb structure, is attached with active carbon inside each group hole of honeycomb structure, is handled by step 2 or step 3
Flue gas afterwards removes the neutrophil granule carried in flue gas from one end of adsorption layer to other end steady flow.
7. a kind of minimizing technology of organic exhaust gas according to claim 6, it is characterised in that: the honeycomb of the adsorption layer
The hole diameter of structure is set as 1-5cm, the whole cylindrical structure and its diameter is set as 25-50cm, institute of the adsorption layer
The thickness for stating adsorption layer is set as 0.5-2.5m.
8. a kind of minimizing technology of organic exhaust gas according to claim 1, it is characterised in that: combustion furnace in the step 1
The heat that burning organic exhaust gas generates is used as heat source, and the production process heated to needs heats.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111111337A (en) * | 2019-12-31 | 2020-05-08 | 南京工大环境科技有限公司 | Treatment method of mixed waste gas containing high-concentration dichloroethane and hydrogen chloride |
| CN114874794A (en) * | 2022-05-05 | 2022-08-09 | 阚世坤 | Intelligent production system for flame-gathering gas fuel |
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