CN110478992A - A kind of coke oven flue gas denitrating technique - Google Patents

A kind of coke oven flue gas denitrating technique Download PDF

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Publication number
CN110478992A
CN110478992A CN201910680075.1A CN201910680075A CN110478992A CN 110478992 A CN110478992 A CN 110478992A CN 201910680075 A CN201910680075 A CN 201910680075A CN 110478992 A CN110478992 A CN 110478992A
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parts
exhaust gas
absorbing liquid
weight
flue gas
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CN201910680075.1A
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Chinese (zh)
Inventor
田永军
田晓亮
�田�浩
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TIANJIN HAOCHUANG ENERGY SAVING ENVIRONMENTAL PROTECTION EQUIPMENT Co Ltd
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TIANJIN HAOCHUANG ENERGY SAVING ENVIRONMENTAL PROTECTION EQUIPMENT Co Ltd
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Priority to CN201910680075.1A priority Critical patent/CN110478992A/en
Publication of CN110478992A publication Critical patent/CN110478992A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D46/00Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/02Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
    • 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
    • B01D53/46Removing components of defined structure
    • B01D53/54Nitrogen compounds
    • B01D53/56Nitrogen oxides
    • 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
    • B01D53/46Removing components of defined structure
    • B01D53/60Simultaneously removing sulfur oxides and nitrogen oxides
    • 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
    • B01D2251/00Reactants
    • B01D2251/20Reductants
    • B01D2251/206Ammonium compounds
    • B01D2251/2062Ammonia
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2251/00Reactants
    • B01D2251/20Reductants
    • B01D2251/206Ammonium compounds
    • B01D2251/2067Urea
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2251/00Reactants
    • B01D2251/30Alkali metal compounds
    • B01D2251/304Alkali metal compounds of sodium
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2251/00Reactants
    • B01D2251/30Alkali metal compounds
    • B01D2251/306Alkali metal compounds of potassium
    • 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
    • B01D2251/00Reactants
    • B01D2251/60Inorganic bases or salts
    • B01D2251/606Carbonates
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2258/00Sources of waste gases
    • B01D2258/02Other waste gases
    • B01D2258/0283Flue gases
    • 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
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters

Abstract

The present invention provides a kind of coke oven flue gas denitrating technique, which comprises the following steps: low temperature waste gas is imported in combustion heater and heated by S1, so that exhaust gas temperature reaches 180 DEG C of minimum temperature of denitration reaction;Exhaust gas after heating up in S1 is imported into exhaust gas denitration device by S2 by air inlet pipe, and dust settling pocket is equipped in air inlet pipe;Exhaust gas after dedusting in S2 is passed through absorbing reaction device by S3, and exhaust gas comes into full contact with the absorbent in reaction solution in absorbing reaction device, some NOx, SO in exhaust gas2It is absorbed by reaction solution;By treated in S3, exhaust gas is successively passed through in the first absorbing liquid, the second absorbing liquid and third absorbing liquid S4 again carries out denitration, is purified flue gas.

Description

A kind of coke oven flue gas denitrating technique
Technical field
The present invention relates to waste gas purification technical field more particularly to a kind of coke oven flue gas denitrating techniques.
Background technique
Atmosphere pollution be 21st century human society survival and development faced most serious the problem of one of, with work The development of industry and urbanization, the regulation of the improvement especially oxysulfide and nitrogen oxides pollutant of exhaust gas, which has been carved, not to be allowed It is slow;Oxysulfide and nitrogen oxides can lead to the formation of acid rain, and its feature is that contaminant capacity is big, and pollution range is wide, causes area Domain property environmental acidification;It is endangered caused by it very greatly, such as seriously affects the ecosystem, so that lake is become acid, influence fish etc. The growth and breeding of aquatile even cause death;And soil acidification is caused, crop production reduction, forest slows down growth;It invades Erosion, corrosion or damage building such as metal equipment and lime stone, marble etc., also have indirect and potential shadow to the health of human body It rings;In the prior art, the denitration effect of denitrating technique is bad, in exhaust gas the amount of nitrogen-containing oxide cannot be down to safety standard with Under, it cannot meet environmental requirements well.
Summary of the invention
The present invention exactly against the above technical problems, provides a kind of coke oven flue gas denitrating technique.
To achieve the above object, using following technical scheme: a kind of coke oven flue gas denitrating technique, feature exist the present invention In, comprising the following steps:
Low temperature waste gas is imported in combustion heater and is heated by S1, so that exhaust gas temperature reaches the lowest temperature of denitration reaction 180 DEG C of degree;
Exhaust gas after heating up in S1 is imported into exhaust gas denitration device by S2 by air inlet pipe, and dedusting is equipped in air inlet pipe Bag;
Exhaust gas after dedusting in S2 is passed through absorbing reaction device by S3, the absorption in absorbing reaction device in exhaust gas and reaction solution Agent comes into full contact with, some NOx, SO in exhaust gas2It is absorbed by reaction solution;
By treated in S3, exhaust gas is successively passed through in the first absorbing liquid, the second absorbing liquid and third absorbing liquid S4 again carries out Denitration is purified flue gas;First absorbing liquid is composed of the following components by weight: 80-20 parts of water, 24-26 parts of sodium sulfite, carbon Sour sodium 3-5 parts and ammonium hydroxide 5-7 parts;Second absorbing liquid is composed of the following components by weight: 80-120 parts of water, potassium hydroxide 50-52 Part, 1-3 parts of postassium hypochlorite and 5-7 parts of ammonium hydroxide;Third absorbing liquid is composed of the following components by weight: 80-20 parts of water, urea 20- 22 parts, 10-12 parts of ammonium sulfide and 5-7 parts of active carbon.
The absorbing liquid is composed of the following components by weight: EDTA closes iron 1-3 parts, 10-15 parts of potassium permanganate, organosilicon 5- 8 parts, 2-8 parts of butyl titanate, 10-20 parts of magnesium carbonate, 8-12 parts of nano silicon oxide, 3-8 parts of ferrous sulfate, 2-8 parts of phosphite ester, 5-11 parts of ozone oil, active 2-8 parts of powdered carbon, 1-2 parts of stearic bicine diester base diethylenetriamine, 2-7 parts of soluble cobalt.
The organosilicon is at least one of methyl-silicone oil, methyl trichlorosilane and silicon rubber.
The partial size of the active carbon is 40-50nm, floatability 30-40%, specific surface area 1600-1800m2/g。
First absorbing liquid further includes the sodium-based montmorillonite of 0.5-0.7 parts by weight;Second absorbing liquid further includes 3-5 weight The ferric sulfate of part and the nickel sulfate of 1-2 parts by weight;Third absorbing liquid further includes the zeolite of 2-4 parts by weight.
It is adopted again the beneficial effects of the present invention are: the present invention first comes into full contact with exhaust gas with the absorbent in reaction solution after reacting Acid-base reaction and redox reaction are carried out with the absorbing liquid of staged concentration and body containing niter air, and combines auxiliary porous carrier, The fatigue limit that body containing niter air absorbs lye is breached, so that almost absorbed liquid reaction is dangerous for the body containing niter air of middle and high concentration To the greatest extent, denitration effect is preferable.
Specific embodiment
Below with reference to embodiment, the invention will be further described:
A kind of coke oven flue gas denitrating technique, which comprises the following steps:
Low temperature waste gas is imported in combustion heater and is heated by S1, so that exhaust gas temperature reaches the lowest temperature of denitration reaction 180 DEG C of degree;
Exhaust gas after heating up in S1 is imported into exhaust gas denitration device by S2 by air inlet pipe, and dedusting is equipped in air inlet pipe Bag;
Exhaust gas after dedusting in S2 is passed through absorbing reaction device by S3, the absorption in absorbing reaction device in exhaust gas and reaction solution Agent comes into full contact with, some NOx, SO in exhaust gas2It is absorbed by reaction solution;
By treated in S3, exhaust gas is successively passed through in the first absorbing liquid, the second absorbing liquid and third absorbing liquid S4 again carries out Denitration is purified flue gas;First absorbing liquid is composed of the following components by weight: 80-20 parts of water, 24-26 parts of sodium sulfite, carbon Sour sodium 3-5 parts and ammonium hydroxide 5-7 parts;Second absorbing liquid is composed of the following components by weight: 80-120 parts of water, potassium hydroxide 50-52 Part, 1-3 parts of postassium hypochlorite and 5-7 parts of ammonium hydroxide;Third absorbing liquid is composed of the following components by weight: 80-20 parts of water, urea 20- 22 parts, 10-12 parts of ammonium sulfide and 5-7 parts of active carbon.
The absorbing liquid is composed of the following components by weight: EDTA closes iron 1-3 parts, 10-15 parts of potassium permanganate, organosilicon 5- 8 parts, 2-8 parts of butyl titanate, 10-20 parts of magnesium carbonate, 8-12 parts of nano silicon oxide, 3-8 parts of ferrous sulfate, 2-8 parts of phosphite ester, 5-11 parts of ozone oil, active 2-8 parts of powdered carbon, 1-2 parts of stearic bicine diester base diethylenetriamine, 2-7 parts of soluble cobalt.
The organosilicon is at least one of methyl-silicone oil, methyl trichlorosilane and silicon rubber.
The partial size of the active carbon is 40-50nm, floatability 30-40%, specific surface area 1600-1800m2/g。
First absorbing liquid further includes the sodium-based montmorillonite of 0.5-0.7 parts by weight;Second absorbing liquid further includes 3-5 weight The ferric sulfate of part and the nickel sulfate of 1-2 parts by weight;Third absorbing liquid further includes the zeolite of 2-4 parts by weight.
A kind of coke oven flue gas denitrating technique of embodiment 1, comprising the following steps:
Low temperature waste gas is imported in combustion heater and is heated by S1, so that obtaining the most bottom that exhaust gas temperature reaches denitration reaction 180 DEG C of temperature;
Exhaust gas after heating up in S1 is imported into exhaust gas denitration device by S2 by air inlet pipe, and dedusting is equipped in air inlet pipe Bag;
Exhaust gas after dedusting in S2 is passed through absorbing reaction device by S3, the absorption in absorbing reaction device in exhaust gas and reaction solution Agent comes into full contact with, some NOx, SO in exhaust gas2It is absorbed by reaction solution;
By treated in S3, exhaust gas is successively passed through in the first absorbing liquid, the second absorbing liquid and third absorbing liquid S4 again carries out Denitration is purified flue gas;First absorbing liquid is composed of the following components by weight: 80 parts of water, 24 parts of sodium sulfite, sodium carbonate 3 Part and 5 parts of ammonium hydroxide;Second absorbing liquid is composed of the following components by weight: 80 parts of water, 50 parts of potassium hydroxide, 1 part of postassium hypochlorite and 5 parts of ammonium hydroxide;Third absorbing liquid is composed of the following components by weight: 80 parts of water, 20 parts of urea, 10 parts of ammonium sulfide and 5 parts of active carbon.
The absorbing liquid is composed of the following components by weight: EDTA closes 1 part of iron, 10 parts of potassium permanganate, 5 parts of organosilicon, titanium 2 parts of acid butyl ester, 10 parts of magnesium carbonate, 8 parts of nano silicon oxide, 3 parts of ferrous sulfate, 2 parts of phosphite ester, 5 parts of ozone oil, active powdered carbon 2 parts, 1 part of stearic bicine diester base diethylenetriamine, 2 parts of soluble cobalt.
The organosilicon is at least one of methyl-silicone oil, methyl trichlorosilane and silicon rubber.
The partial size of the active carbon is 40nm, floatability 30%, specific surface area 1600m2/g。
First absorbing liquid further includes the sodium-based montmorillonite of 0.5 parts by weight;Second absorbing liquid further includes the sulphur of 3 parts by weight The nickel sulfate of sour iron and 1 parts by weight;Third absorbing liquid further includes the zeolite of 2 parts by weight.
A kind of coke oven flue gas denitrating technique of embodiment 2, comprising the following steps:
Low temperature waste gas is imported in combustion heater and is heated by S1, so that exhaust gas temperature reaches the lowest temperature of denitration reaction 180 DEG C of degree;
Exhaust gas after heating up in S1 is imported into exhaust gas denitration device by S2 by air inlet pipe, and dedusting is equipped in air inlet pipe Bag;
Exhaust gas after dedusting in S2 is passed through absorbing reaction device by S3, the absorption in absorbing reaction device in exhaust gas and reaction solution Agent comes into full contact with, some NOx, SO in exhaust gas2It is absorbed by reaction solution;
By treated in S3, exhaust gas is successively passed through in the first absorbing liquid, the second absorbing liquid and third absorbing liquid S4 again carries out Denitration is purified flue gas;First absorbing liquid is composed of the following components by weight: 120 parts of water, 26 parts of sodium sulfite, sodium carbonate 5 Part and 7 parts of ammonium hydroxide;Second absorbing liquid is composed of the following components by weight: 20 parts of water, 52 parts of potassium hydroxide, 3 parts of postassium hypochlorite and 7 parts of ammonium hydroxide;Third absorbing liquid is composed of the following components by weight: 20 parts of water, 22 parts of urea, 12 parts of ammonium sulfide and 7 parts of active carbon.
The absorbing liquid is composed of the following components by weight: EDTA closes 3 parts of iron, 15 parts of potassium permanganate, 8 parts of organosilicon, titanium 8 parts of acid butyl ester, 20 parts of magnesium carbonate, 12 parts of nano silicon oxide, 8 parts of ferrous sulfate, 8 parts of phosphite ester, 11 parts of ozone oil, active carbon 8 parts of powder, 2 parts of stearic bicine diester base diethylenetriamine, 7 parts of soluble cobalt.
The organosilicon is at least one of methyl-silicone oil, methyl trichlorosilane and silicon rubber.
The partial size of the active carbon is 50nm, floatability 40%, specific surface area 1800m2/g。
First absorbing liquid further includes the sodium-based montmorillonite of 0.7 parts by weight;Second absorbing liquid further includes the sulphur of 5 parts by weight The nickel sulfate of sour iron and 2 parts by weight;Third absorbing liquid further includes the zeolite of 4 parts by weight.
A kind of coke oven flue gas denitrating technique of embodiment 3, comprising the following steps:
Low temperature waste gas is imported in combustion heater and is heated by S1, so that exhaust gas temperature reaches the lowest temperature of denitration reaction 180 DEG C of degree;
Exhaust gas after heating up in S1 is imported into exhaust gas denitration device by S2 by air inlet pipe, and dedusting is equipped in air inlet pipe Bag;
Exhaust gas after dedusting in S2 is passed through absorbing reaction device by S3, the absorption in absorbing reaction device in exhaust gas and reaction solution Agent comes into full contact with, some NOx, SO in exhaust gas2It is absorbed by reaction solution;
By treated in S3, exhaust gas is successively passed through in the first absorbing liquid, the second absorbing liquid and third absorbing liquid S4 again carries out Denitration is purified flue gas;First absorbing liquid is composed of the following components by weight: 100 parts of water, 25 parts of sodium sulfite, sodium carbonate 4 Part and 6 parts of ammonium hydroxide;Second absorbing liquid is composed of the following components by weight: 100 parts of water, 51 parts of potassium hydroxide, 2 parts of postassium hypochlorite and 6 parts of ammonium hydroxide;Third absorbing liquid is composed of the following components by weight: 100 parts of water, 21 parts of urea, 11 parts of ammonium sulfide and active carbon 6 Part.
The absorbing liquid is composed of the following components by weight: EDTA closes 2 parts of iron, 13 parts of potassium permanganate, 6 parts of organosilicon, titanium 5 parts of acid butyl ester, 15 parts of magnesium carbonate, 10 parts of nano silicon oxide, 5 parts of ferrous sulfate, 5 parts of phosphite ester, 8 parts of ozone oil, active carbon 5 parts of powder, 1.5 parts of stearic bicine diester base diethylenetriamine, 4 parts of soluble cobalt.
The organosilicon is at least one of methyl-silicone oil, methyl trichlorosilane and silicon rubber.
The partial size of the active carbon is 45nm, floatability 35%, specific surface area 1700m2/g。
First absorbing liquid further includes the sodium-based montmorillonite of 0.6 parts by weight;Second absorbing liquid further includes the sulphur of 4 parts by weight The nickel sulfate of sour iron and 1.5 parts by weight;Third absorbing liquid further includes the zeolite of 3 parts by weight.
Above example is to the present invention have been described in detail, it is clear that the present invention implements not by the limit of aforesaid way System as long as using the various improvement that the inventive concept and technical scheme of the present invention carry out, or not improved directly applies to it Its occasion, it is within the scope of the present invention.

Claims (5)

1. a kind of coke oven flue gas denitrating technique, which comprises the following steps:
Low temperature waste gas is imported in combustion heater and is heated by S1, so that exhaust gas temperature reaches the minimum temperature of denitration reaction 180℃;
Exhaust gas after heating up in S1 is imported into exhaust gas denitration device by S2 by air inlet pipe, and dust settling pocket is equipped in air inlet pipe;
Exhaust gas after dedusting in S2 is passed through absorbing reaction device by S3, and exhaust gas is filled with the absorbent in reaction solution in absorbing reaction device Tap is touched, some NOx, SO in exhaust gas2It is absorbed by reaction solution;
By treated in S3, exhaust gas is successively passed through in the first absorbing liquid, the second absorbing liquid and third absorbing liquid S4 again takes off Nitre is purified flue gas;First absorbing liquid is composed of the following components by weight: 80-20 parts of water, 24-26 parts of sodium sulfite, carbonic acid 3-5 parts and ammonium hydroxide 5-7 parts of sodium;Second absorbing liquid is composed of the following components by weight: 80-120 parts of water, 50-52 parts of potassium hydroxide, 1-3 parts and ammonium hydroxide 5-7 parts of postassium hypochlorite;Third absorbing liquid is composed of the following components by weight: 80-20 parts of water, urea 20-22 Part, 10-12 parts of ammonium sulfide and 5-7 parts of active carbon.
2. a kind of coke oven flue gas denitrating technique according to claim 1, which is characterized in that the absorbing liquid by weight by with The following group is grouped as: EDTA closes iron 1-3 parts, 10-15 parts of potassium permanganate, 5-8 parts of organosilicon, 2-8 parts of butyl titanate, magnesium carbonate 10- 20 parts, 8-12 parts of nano silicon oxide, 3-8 parts of ferrous sulfate, 2-8 parts of phosphite ester, 5-11 parts of ozone oil, active 2-8 parts of powdered carbon, 1-2 parts of stearic bicine diester base diethylenetriamine, 2-7 parts of soluble cobalt.
3. a kind of coke oven flue gas denitrating technique according to claim 2, which is characterized in that the organosilicon is methyl silicon At least one of oil, methyl trichlorosilane and silicon rubber.
4. a kind of coke oven flue gas denitrating technique according to claim 3, which is characterized in that the partial size of the active carbon is 40-50nm, floatability 30-40%, specific surface area 1600-1800m2/g。
5. a kind of coke oven flue gas denitrating technique according to claim 1, which is characterized in that first absorbing liquid further includes The sodium-based montmorillonite of 0.5-0.7 parts by weight;Second absorbing liquid further includes the ferric sulfate of 3-5 parts by weight and the sulfuric acid of 1-2 parts by weight Nickel;Third absorbing liquid further includes the zeolite of 2-4 parts by weight.
CN201910680075.1A 2019-07-26 2019-07-26 A kind of coke oven flue gas denitrating technique Pending CN110478992A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112742190A (en) * 2020-12-11 2021-05-04 攀钢集团攀枝花钢铁研究院有限公司 Complexing denitration process capable of recycling

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107138035A (en) * 2017-06-27 2017-09-08 苏州克莱尔环保科技有限公司 A kind of tail gas denitrating technique
CN107308783A (en) * 2017-08-31 2017-11-03 山东瑞嘉通风环保科技有限公司 A kind of simultaneous desulfuration and denitration technique by wet flue gas method
KR20180017466A (en) * 2016-08-09 2018-02-21 주식회사 서호엔텍 Dry reactor for efficiency enhancement of acdity gas and reactant
CN109351159A (en) * 2018-11-29 2019-02-19 孙信 A kind of industrial low-temperature exhaust gas denitration technique

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20180017466A (en) * 2016-08-09 2018-02-21 주식회사 서호엔텍 Dry reactor for efficiency enhancement of acdity gas and reactant
CN107138035A (en) * 2017-06-27 2017-09-08 苏州克莱尔环保科技有限公司 A kind of tail gas denitrating technique
CN107308783A (en) * 2017-08-31 2017-11-03 山东瑞嘉通风环保科技有限公司 A kind of simultaneous desulfuration and denitration technique by wet flue gas method
CN109351159A (en) * 2018-11-29 2019-02-19 孙信 A kind of industrial low-temperature exhaust gas denitration technique

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112742190A (en) * 2020-12-11 2021-05-04 攀钢集团攀枝花钢铁研究院有限公司 Complexing denitration process capable of recycling

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Application publication date: 20191122