CN108686479A - A kind of processing method of high-sulfur nitrous oxides exhaust gas - Google Patents
A kind of processing method of high-sulfur nitrous oxides exhaust gas Download PDFInfo
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- CN108686479A CN108686479A CN201810503440.7A CN201810503440A CN108686479A CN 108686479 A CN108686479 A CN 108686479A CN 201810503440 A CN201810503440 A CN 201810503440A CN 108686479 A CN108686479 A CN 108686479A
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- exhaust gas
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- nitrous oxides
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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
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
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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
- B01D53/54—Nitrogen compounds
- B01D53/56—Nitrogen oxides
-
- 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
- B01D53/79—Injecting reactants
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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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- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
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Abstract
The present invention relates to a kind of processing methods of high-sulfur nitrous oxides exhaust gas, include the following steps:High-sulfur nitrous oxides exhaust gas is dusted;High-sulfur nitrous oxides exhaust gas after dedusting is tentatively heated;High-sulfur nitrous oxides exhaust gas after preliminary heating is heated again;High-sulfur nitrous oxides exhaust gas after heating again is passed through out of stock device, and sprays ammonium hydroxide into out of stock device and is reacted;Exhaust gas after reaction is cooled down;Exhaust gas after cooling is passed through desulfurizer, and sprays alkaline solution into desulfurizer and is reacted;Exhaust gas after reaction is passed through dehumidification device;The gas discharging that will be obtained after dehumidifying.Preparation process of the present invention is simple, easily operated, and waste gas treatment process is not required to a large amount of outer adding medicines, secondary pollution will not be brought to environment, production cost is low, it is easy to accomplish industrial-scale production overcomes prior art processing high-sulfur nitrous oxides exhaust gas problem of high cost completely.
Description
Technical field
The present invention relates to exhaust-gas treatment field, specially a kind of processing method of high-sulfur nitrous oxides exhaust gas.
Background technology
As human civilization is gradually moved towards deeply, there are a tremendous raising in social economy, know-how, and industrial production
As the main power of raising economic force, but industrial production is also to be produced in engineering production an important factor for causing atmosphere pollution
Raw industrial waste gas, industrial wastewater, waste residue (i.e. Industrial " three Waste ") are discharged by various modes in air, pollute us
Air, this not only brings baneful influence to ball ecological environment, also damages the health of the mankind.
According to the statistic of classification analysis to main atmosphere pollution, main source can be summarized as several broad aspects:Fuel combustion,
Industrial processes, communications and transportation etc., though the air pollution emission amount generated in various industrial processes only accounts for atmosphere pollution
1/5 or so of total release, but since emission point compares concentration, concentration is higher, so the atmosphere pollution to industrial and mining area or part
It is more serious.
In recent years, with the rapid development of China's industrial economy, the growth of energy-consuming is also increasingly accelerated, incident
It is that sulphur nitrogen oxide emission rapidly rises, the sulphur nitrogen oxides being discharged into air can be sent out under the ultraviolet light irradiation in sunlight
The third contact of a total solar or lunar eclipse chemically reacts, and generates a kind of photochemical fog, it is a kind of to seem the transparent environment killer for smelling the people that but chokes.Meanwhile
Sulphur nitrogen oxides is also to lead to one of arch-criminal of acid rain, it also participates in the destruction of ozone layer, and nitrous oxide is in the stratosphere of high-altitude
Ozone layer can be destroyed, makes more ultraviolet radiation to ground, increases the incidence of cutaneum carcinoma.So Atmospheric Sulfur nitrogen oxides
Control and administer paid attention to by countries in the world.According to scholarly forecast, if not controlling, the year two thousand twenty China discharged nitrous oxides total amount
It is up to 30,000,000 tons.Environmental protection administration indicates that the overall control of sulphur nitrogen oxides will be carried out in China, and submit national people
Big Standing Committee's approval is as new emission reduction targets.Therefore high-sulfur nitrous oxides exhaust gas is administered extremely urgent.
Invention content
For the above-mentioned prior art the shortcomings that, the present invention provide a kind of efficient, simple high-sulfur nitrous oxides exhaust gas
Processing method.
The present invention solves above-mentioned technical problem and uses following technical scheme:A kind of processing side of high-sulfur nitrous oxides exhaust gas
Method includes the following steps:
(1) high-sulfur nitrous oxides exhaust gas is dusted;
(2) the high-sulfur nitrous oxides exhaust gas after dedusting is tentatively heated;
(3) the high-sulfur nitrous oxides exhaust gas after preliminary heating is heated again;
(4) the high-sulfur nitrous oxides exhaust gas after heating again is passed through out of stock device, and ammonium hydroxide is sprayed into out of stock device
It is reacted;
(5) exhaust gas after reaction in step (4) is cooled down;
(6) exhaust gas after cooling in step (5) is passed through desulfurizer, and sprays alkaline solution into desulfurizer and carries out
Reaction;
(7) exhaust gas after reaction in step (6) is passed through dehumidification device;
(8) gas discharging obtained after step (7) dehumidifying.
Preferably, dedusting described in step (1) is electric precipitation.
Preferably, tentatively heating is carried out by heat exchanger described in step (2), the temperature after exchange is 200~250
℃。
Preferably, by electric heater, the temperature after heating is 280~300 DEG C for heating again described in step (3).
Preferably, have out of stock catalyst in out of stock device described in step (4), the ammonium hydroxide that the ammonium hydroxide is 20%.
Preferably, cooling described in step (5) is cooled down by heat exchanger, the gas temperature after cooling is
100~150 DEG C.
Preferably, alkaline solution described in step (6) is ammonium hydroxide or calcium hydroxide.
Further, the calcium hydroxide is reacted in reaction tank with industrial water purification for quick lime and is obtained.
As further preferred, the water that dehumidification device obtains described in step (7) is added to the reaction tank.
The present invention has the following advantages that compared with prior art:Present invention process is simple, and reaction condition is easy to reach, reaction
Also easy to control, processing exhausted air quantity is big;The present invention is first dusted exhaust gas, and dust can be prevented to subsequent desulphurization denitration catalyst
Performance is destroyed, and catalytic effect is improved;Out of stock using ammonium hydroxide progress, effect is good, source is wide, at low cost, and when handling exhaust gas
New pollutant, ammonium hydroxide will not be brought higher to nitrogen oxides of exhaust gas treatment effeciency, greatly reduce entire processing cost;This
Invention uses heat exchanger raising and reducing into trip temperature, efficiently uses thermal energy, energy consumption is small;Desulfurization utilizes lye, effect
Fruit is good, and cost is also low, finally again by dehumidifying after, the gas of outer row meets environmental requirement;Present invention process flow is environmentally protective,
Energy consumption is small, it is easy to accomplish industrial-scale production.
Description of the drawings
Fig. 1 is the process flow chart of the present invention.
Specific implementation mode
In order to make the technical means, the creative features, the aims and the efficiencies achieved by the present invention be easy to understand, tie below
Conjunction is specifically illustrating and embodiment, and the present invention is further explained.It should be appreciated that specific embodiment described herein is only used to solve
The present invention is released, is not intended to limit the present invention.
With reference to figure 1, a kind of processing method of high-sulfur nitrous oxides exhaust gas includes the following steps:
(1) high-sulfur nitrous oxides exhaust gas is dusted;
(2) the high-sulfur nitrous oxides exhaust gas after dedusting is tentatively heated by heat exchanger;
(3) the high-sulfur nitrous oxides exhaust gas after preliminary heating is heated again by electric heater;
(4) the high-sulfur nitrous oxides exhaust gas after heating again is passed through out of stock device, and ammonium hydroxide is sprayed into out of stock device
It is reacted;
(5) exhaust gas after reaction in step (4) is cooled down by heat exchanger;
(6) exhaust gas after cooling in step (5) is passed through desulfurizer, and sprays alkaline solution into desulfurizer and carries out
Preferably calcium hydroxide is obtained by the reaction by quick lime and industrial water purification in reaction, alkaline solution in reaction tank;
(7) exhaust gas after reaction in step (6) is passed through dehumidification device, the water of generation is preferably pressed into reaction tank;
(8) gas discharging obtained after step (7) dehumidifying.
Embodiment 1:
The high-sulfur nitrous oxides exhaust gas that industrial production generates is dusted by electric precipitator, a large amount of dust is removed.
High-sulfur nitrous oxides exhaust gas after dedusting is tentatively heated through over-heat-exchanger, the heat exchanger in preliminary heating for the first time
Be passed through fuel gas buring generation heat high-sulfur nitrous oxides exhaust gas is tentatively heated, subsequently due to high-temp waste gas can with again
The high-sulfur nitrous oxides exhaust gas after dedusting being passed through carries out heat exchange, so combustion can be passed through a small amount of heat exchanger again
Gas burns.High-sulfur nitrous oxides exhaust gas is 200 DEG C through preliminary temperature after heating, subsequently into electric heater again add
The temperature of heat, the high-sulfur nitrous oxides exhaust gas after heating again is 280 DEG C.High-sulfur nitrous oxides exhaust gas after heating again is led to
Enter to out of stock device, while spraying the ammonium hydroxide that mass fraction is 20% into out of stock device and being reacted, has in the out of stock device
The catalyst for promoting ammonium hydroxide and nitrogen oxides of exhaust gas to react, at high temperature, nitrogen oxides of exhaust gas is converted into nitrogen, realizes
It is out of stock.Exhaust gas after will be out of stock is passed through heat exchanger and cools down, it is out of stock after exhaust gas temperature it is higher, can be handed over the new heat that enters
The low temperature high-sulfur nitrous oxides exhaust gas of parallel operation carries out heat interaction, it is out of stock after exhaust gas heat exchange after, temperature is 100 DEG C.It will cooling
Exhaust gas is passed through out of stock device afterwards, and sprays alkaline solution into desulfurizer and reacted, in sprinkling alkaline solution and exhaust gas
Sulfur dioxide, sulfur trioxide carry out neutralization reaction, achieve the effect that desulfurization, alkaline solution are ammonium hydroxide or calcium hydroxide, preferably hydrogen
Calcium oxide, calcium hydroxide is reacted with industrial water purification in reaction tank for quick lime to be obtained.Exhaust gas after desulfurization is passed through dehumidifying dress
It sets and remove steam, the water that dehumidification device obtains can arrange or be added to outside realization in the reaction tank and recycle.Exhaust gas passes through
After dehumidification device water removal, it is clean air, can arranges outside, meet environmental requirement.
Embodiment 2:
The high-sulfur nitrous oxides exhaust gas that industrial production generates is dusted by electric precipitator, a large amount of dust is removed.
High-sulfur nitrous oxides exhaust gas after dedusting is tentatively heated through over-heat-exchanger.High-sulfur nitrous oxides exhaust gas is through preliminary heating
Temperature is 220 DEG C afterwards, is heated again subsequently into electric heater, the temperature of the high-sulfur nitrous oxides exhaust gas after heating again
It is 290 DEG C.High-sulfur nitrous oxides exhaust gas after heating again is passed into out of stock device, while quality is sprayed into out of stock device
The ammonium hydroxide that score is 20% is reacted, and has the catalyst for promoting ammonium hydroxide and nitrogen oxides of exhaust gas to react in the out of stock device,
At high temperature, nitrogen oxides of exhaust gas is converted into nitrogen, realizes out of stock.Exhaust gas after will be out of stock is passed through heat exchanger and drops
Temperature, it is out of stock after exhaust gas temperature it is higher, heat interaction can be carried out with the new low temperature high-sulfur nitrous oxides exhaust gas into heat exchanger,
After exhaust gas heat exchange after out of stock, temperature is 120 DEG C.Exhaust gas after cooling is passed through out of stock device, and is sprayed into desulfurizer
Alkaline solution is reacted, and sprinkling alkaline solution carries out neutralization reaction with sulfur dioxide, the sulfur trioxide in exhaust gas, reaches desulfurization
Effect, alkaline solution be ammonium hydroxide or calcium hydroxide, preferably calcium hydroxide, calcium hydroxide be quick lime with industry water purification reacting
It reacts and obtains in pond.By the exhaust gas after desulfurization be passed through dehumidification device carry out remove steam, the water that dehumidification device obtains can arrange outside or
Realization in the reaction tank is added to recycle.Exhaust gas is clean air, can arrange, meet outside after dehumidification device removes water
Environmental requirement.
Embodiment 3:
The high-sulfur nitrous oxides exhaust gas that industrial production generates is dusted by electric precipitator, a large amount of dust is removed.
High-sulfur nitrous oxides exhaust gas after dedusting is tentatively heated through over-heat-exchanger.High-sulfur nitrous oxides exhaust gas is through preliminary heating
Temperature is 250 DEG C afterwards, is heated again subsequently into electric heater, the temperature of the high-sulfur nitrous oxides exhaust gas after heating again
It is 300 DEG C.High-sulfur nitrous oxides exhaust gas after heating again is passed into out of stock device, while quality is sprayed into out of stock device
The ammonium hydroxide that score is 20% is reacted, and has the catalyst for promoting ammonium hydroxide and nitrogen oxides of exhaust gas to react in the out of stock device,
At high temperature, nitrogen oxides of exhaust gas is converted into nitrogen, realizes out of stock.Exhaust gas after will be out of stock is passed through heat exchanger and drops
Temperature, it is out of stock after exhaust gas temperature it is higher, heat interaction can be carried out with the new low temperature high-sulfur nitrous oxides exhaust gas into heat exchanger,
After exhaust gas heat exchange after out of stock, temperature is 150 DEG C.Exhaust gas after cooling is passed through out of stock device, and is sprayed into desulfurizer
Alkaline solution is reacted, and sprinkling alkaline solution carries out neutralization reaction with sulfur dioxide, the sulfur trioxide in exhaust gas, reaches desulfurization
Effect, alkaline solution be ammonium hydroxide or calcium hydroxide, preferably calcium hydroxide, calcium hydroxide be quick lime with industry water purification reacting
It reacts and obtains in pond.By the exhaust gas after desulfurization be passed through dehumidification device carry out remove steam, the water that dehumidification device obtains can arrange outside or
Realization in the reaction tank is added to recycle.Exhaust gas is clean air, can arrange, meet outside after dehumidification device removes water
Environmental requirement.
Preparation process of the present invention is simple, easily operated, and waste gas treatment process is not required to a large amount of outer adding medicines, will not band to environment
Carry out secondary pollution, production cost is low, it is easy to accomplish industrial-scale production overcomes prior art processing high-sulfur nitrogen oxidation completely
Object exhaust gas problem of high cost.
The basic principles and main features and advantages of the present invention of the present invention, the technology of the industry has been shown and described above
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes
Change and improvement all fall within the protetion scope of the claimed invention, the claimed scope of the invention by appended claims and its
Equivalent thereof.
Claims (9)
1. a kind of processing method of high-sulfur nitrous oxides exhaust gas, includes the following steps:
(1) high-sulfur nitrous oxides exhaust gas is dusted;
(2) the high-sulfur nitrous oxides exhaust gas after dedusting is tentatively heated;
(3) the high-sulfur nitrous oxides exhaust gas after preliminary heating is heated again;
(4) the high-sulfur nitrous oxides exhaust gas after heating again is passed through out of stock device, and sprays ammonium hydroxide into out of stock device and carries out
Reaction;
(5) exhaust gas after reaction in step (4) is cooled down;
(6) exhaust gas after cooling in step (5) is passed through desulfurizer, and sprays alkaline solution into desulfurizer and carries out instead
It answers;
(7) exhaust gas after reaction in step (6) is passed through dehumidification device;
(8) gas discharging obtained after step (7) dehumidifying.
2. according to the method described in claim 1, dedusting described in step (1) is electric precipitation.
3. according to the method described in claim 1, tentatively heating is carried out by heat exchanger described in step (2), after exchange
Temperature is 200~250 DEG C.
4. according to the method described in claim 1, heating passes through electric heater, the temperature after heating again described in step (3)
It is 280~300 DEG C.
5. according to the method described in claim 1, there is out of stock catalyst in out of stock device described in step (4), the ammonium hydroxide is
20% ammonium hydroxide.
6. according to the method described in claim 1, cooling described in step (5) is cooled down by heat exchanger, after cooling
Gas temperature be 100~150 DEG C.
7. according to the method described in claim 1, alkaline solution described in step (6) is ammonium hydroxide or calcium hydroxide.
8. according to the method described in claim 7, the calcium hydroxide for quick lime and industrial water purification are reacted in reaction tank and
.
9. according to the method described in claim 1, the water that dehumidification device obtains described in step (7) is added to the reaction tank.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810503440.7A CN108686479A (en) | 2018-05-23 | 2018-05-23 | A kind of processing method of high-sulfur nitrous oxides exhaust gas |
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| CN201810503440.7A CN108686479A (en) | 2018-05-23 | 2018-05-23 | A kind of processing method of high-sulfur nitrous oxides exhaust gas |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115445577A (en) * | 2022-08-19 | 2022-12-09 | 广西夏阳环保科技有限公司 | Ammonia water-calcium hydroxide composite atmospheric treatment agent and preparation method thereof |
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| WO2016035297A1 (en) * | 2014-09-05 | 2016-03-10 | 株式会社 東芝 | Gas turbine equipment |
| CN105457475A (en) * | 2015-12-30 | 2016-04-06 | 江苏中建材环保研究院有限公司 | Flue gas desulfurization and denitrification systematization device |
| CN107983155A (en) * | 2017-12-26 | 2018-05-04 | 中冶京诚工程技术有限公司 | Sintering flue gas denitration and desulfurization system and application thereof |
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2018
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016035297A1 (en) * | 2014-09-05 | 2016-03-10 | 株式会社 東芝 | Gas turbine equipment |
| CN104906950A (en) * | 2015-06-23 | 2015-09-16 | 无锡市华星电力环保修造有限公司 | Low-temperature SCR flue gas denitration equipment |
| CN105080245A (en) * | 2015-08-21 | 2015-11-25 | 北京建筑大学 | System and method for integrally recycling condensation heat energy of flue gas with dust and purifying flue gas |
| CN105457475A (en) * | 2015-12-30 | 2016-04-06 | 江苏中建材环保研究院有限公司 | Flue gas desulfurization and denitrification systematization device |
| CN107983155A (en) * | 2017-12-26 | 2018-05-04 | 中冶京诚工程技术有限公司 | Sintering flue gas denitration and desulfurization system and application thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115445577A (en) * | 2022-08-19 | 2022-12-09 | 广西夏阳环保科技有限公司 | Ammonia water-calcium hydroxide composite atmospheric treatment agent and preparation method thereof |
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