CN108097010A - A kind of method of coal desulfurization denitration - Google Patents
A kind of method of coal desulfurization denitration Download PDFInfo
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- CN108097010A CN108097010A CN201711296855.3A CN201711296855A CN108097010A CN 108097010 A CN108097010 A CN 108097010A CN 201711296855 A CN201711296855 A CN 201711296855A CN 108097010 A CN108097010 A CN 108097010A
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- flue gas
- coal
- hydrogen peroxide
- desulfurizing tower
- lime paste
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/75—Multi-step processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- 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
- B01D46/023—Pockets filters, i.e. multiple bag filters mounted on a common frame
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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
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/80—Semi-solid phase processes, i.e. by using slurries
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/10—Oxidants
- B01D2251/106—Peroxides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/20—Reductants
- B01D2251/206—Ammonium compounds
- B01D2251/2067—Urea
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/40—Alkaline earth metal or magnesium compounds
- B01D2251/404—Alkaline earth metal or magnesium compounds of calcium
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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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Abstract
The invention discloses a kind of methods of coal desulfurization denitration, specifically include following steps：Coal flue gas is exchanged heat by plate heat exchanger, the temperature of flue gas is 40 55 DEG C after heat exchange；During flue gas after heat exchange is imported using urea as the denitrating tower of denitrfying agent, realize that internal gas cycles by circulating fan in the inside of denitrating tower, the concentration of emission of NOx is reduced with this, flue gas after reaction is sent into via pipeline in desulfurizing tower, the present invention carries out segment processing by flue gas, it is well arranged, it works well, it is effectively guaranteed energy-saving and emission-reduction, it has ensured atmospheric environment, while has used mist state reactant, it is whole outstanding to the treatment effect of flue gas, the contact area bigger of reactant and flue gas, so as to improve treatment effeciency.
Description
Technical field
The present invention relates to vent gas treatment field, more particularly, to a kind of method of coal desulfurization denitration.
Background technology
Coal is that archaeophyte is imbedded in that underground experienced complicated biochemistry and physicochemical change gradually forms
Solid combustible mineral.
Coal has been described as the gold of black, industrial grain, the master that human world uses since it was 18th century by people
One of energy is wanted, it is after all at present and following very long although the value of coal is much worse than in the past since 21st century
One of indispensable energy source of the production and living of coal or our mankind within a period of time, the supply of coal also relation
To the stabilization of the development of the industry or even entire society's every aspect in China, the supply security problem of coal is also China's energy peace
A most important ring in complete.
Substantial amounts of harmful substance is generated during coal burning, fume treatment one very serious to atmosphere pollution, traditional
As be all Desulfovibrio, but traditional mode efficiency is low, it is difficult to reach good effect.
The content of the invention
The present invention is to overcome the above situation insufficient, it is desirable to provide a kind of technical solution that can be solved the above problems.
A kind of method of coal desulfurization denitration, specifically includes following steps：
S1, coal flue gas is exchanged heat by plate heat exchanger, the temperature of flue gas is 40-55 DEG C after heat exchange；
S2, by after heat exchange flue gas import using urea as the denitrating tower of denitrfying agent in, the inside of denitrating tower passes through Xun Huan
Wind turbine realizes internal gas Xun Huan, and the concentration of emission of NOx is reduced with this, and the flue gas after reaction is sent into via pipeline in desulfurizing tower；
After S3, flue gas are discharged into the process of desulfurizing tower, are sprayed using spraying device amount hydrogen peroxide in the form of mist state, utilize mist
State carries out the NOx in hydrogen peroxide flue gas further oxidation and denitration, and hydrogen peroxide sprays the time as 15-35min；
S4, mixed from the top of desulfurizing tower by lime paste and compressed air in ejection desulfurizing tower, utilize the lime paste of mist state
Desulfurization process is carried out to flue gas, the spray time of lime paste is 3-5min；
S5, the hydrogen peroxide after reacting and lime paste are collected to be multiplexed；
S6, the flue gas after desulfurization is sent into bag filter, by the dedusting of bag filter, is finally arranged via chimney
Go out.
As further embodiment of the present invention：Bag filter can be substituted by electrostatic precipitator.
As further embodiment of the present invention：The lime paste is mainly using pulverized limestone and water by weight 5:2 uniformly
It mixes.
Beneficial effects of the present invention：The present invention carries out segment processing by flue gas, well arranged, works well, effectively
It ensure that energy-saving and emission-reduction, ensured atmospheric environment, while use mist state reactant, it is whole that the treatment effect of flue gas is more gone out
The contact area bigger of color, reactant and flue gas, so as to improve treatment effeciency.
The additional aspect and advantage of the present invention will be set forth in part in the description, and will partly become from the following description
It obtains substantially or is recognized by the practice of the present invention.
Specific embodiment
Below in conjunction with the embodiment of the present invention, the technical solution in the embodiment of the present invention is clearly and completely described,
Obviously, described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.Based in the present invention
Embodiment, those of ordinary skill in the art's all other embodiments obtained without making creative work, all
Belong to the scope of protection of the invention.
In the embodiment of the present invention 1, a kind of method of coal desulfurization denitration specifically includes following steps：
S1, coal flue gas is exchanged heat by plate heat exchanger, the temperature of flue gas is 40-55 DEG C after heat exchange；
S2, by after heat exchange flue gas import using urea as the denitrating tower of denitrfying agent in, the inside of denitrating tower passes through Xun Huan
Wind turbine realizes internal gas Xun Huan, and the concentration of emission of NOx is reduced with this, and the flue gas after reaction is sent into via pipeline in desulfurizing tower；
After S3, flue gas are discharged into the process of desulfurizing tower, are sprayed using spraying device amount hydrogen peroxide in the form of mist state, utilize mist
State carries out the NOx in hydrogen peroxide flue gas further oxidation and denitration, and hydrogen peroxide sprays the time as 15-35min；
S4, mixed from the top of desulfurizing tower by lime paste and compressed air in ejection desulfurizing tower, utilize the lime paste of mist state
Desulfurization process is carried out to flue gas, the spray time of lime paste is 3-5min；
S5, the hydrogen peroxide after reacting and lime paste are collected to be multiplexed；
S6, the flue gas after desulfurization is sent into bag filter, by the dedusting of bag filter, is finally arranged via chimney
Go out.
In the embodiment of the present invention 2, a kind of method of coal desulfurization denitration specifically includes following steps：
S1, coal flue gas is exchanged heat by plate heat exchanger, the temperature of flue gas is 40-55 DEG C after heat exchange；
S2, by after heat exchange flue gas import using urea as the denitrating tower of denitrfying agent in, the inside of denitrating tower passes through Xun Huan
Wind turbine realizes internal gas Xun Huan, and the concentration of emission of NOx is reduced with this, and the flue gas after reaction is sent into via pipeline in desulfurizing tower；
After S3, flue gas are discharged into the process of desulfurizing tower, are sprayed using spraying device amount hydrogen peroxide in the form of mist state, utilize mist
State carries out the NOx in hydrogen peroxide flue gas further oxidation and denitration, and hydrogen peroxide sprays the time as 15min；
S4, mixed from the top of desulfurizing tower by lime paste and compressed air in ejection desulfurizing tower, utilize the lime paste of mist state
Desulfurization process is carried out to flue gas, the spray time of lime paste is 3min；
S5, the hydrogen peroxide after reacting and lime paste are collected to be multiplexed；
S6, the flue gas after desulfurization is sent into bag filter, by the dedusting of bag filter, is finally arranged via chimney
Go out.
In the embodiment of the present invention 3, a kind of method of coal desulfurization denitration specifically includes following steps：
S1, coal flue gas is exchanged heat by plate heat exchanger, the temperature of flue gas is 50 DEG C after heat exchange；
S2, by after heat exchange flue gas import using urea as the denitrating tower of denitrfying agent in, the inside of denitrating tower passes through Xun Huan
Wind turbine realizes internal gas Xun Huan, and the concentration of emission of NOx is reduced with this, and the flue gas after reaction is sent into via pipeline in desulfurizing tower；
After S3, flue gas are discharged into the process of desulfurizing tower, are sprayed using spraying device amount hydrogen peroxide in the form of mist state, utilize mist
State carries out the NOx in hydrogen peroxide flue gas further oxidation and denitration, and hydrogen peroxide sprays the time as 20min；
S4, mixed from the top of desulfurizing tower by lime paste and compressed air in ejection desulfurizing tower, utilize the lime paste of mist state
Desulfurization process is carried out to flue gas, the spray time of lime paste is 4min；
S5, the hydrogen peroxide after reacting and lime paste are collected to be multiplexed；
S6, the flue gas after desulfurization is sent into bag filter, by the dedusting of bag filter, is finally arranged via chimney
Go out.
In the embodiment of the present invention 4, a kind of method of coal desulfurization denitration specifically includes following steps：
S1, coal flue gas is exchanged heat by plate heat exchanger, the temperature of flue gas is 55 DEG C after heat exchange；
S2, by after heat exchange flue gas import using urea as the denitrating tower of denitrfying agent in, the inside of denitrating tower passes through Xun Huan
Wind turbine realizes internal gas Xun Huan, and the concentration of emission of NOx is reduced with this, and the flue gas after reaction is sent into via pipeline in desulfurizing tower；
After S3, flue gas are discharged into the process of desulfurizing tower, are sprayed using spraying device amount hydrogen peroxide in the form of mist state, utilize mist
State carries out the NOx in hydrogen peroxide flue gas further oxidation and denitration, and hydrogen peroxide sprays the time as 35min；
S4, mixed from the top of desulfurizing tower by lime paste and compressed air in ejection desulfurizing tower, utilize the lime paste of mist state
Desulfurization process is carried out to flue gas, the spray time of lime paste is 5min；
S5, the hydrogen peroxide after reacting and lime paste are collected to be multiplexed；
S6, the flue gas after desulfurization is sent into bag filter, by the dedusting of bag filter, is finally arranged via chimney
Go out.
The bag filter can be substituted by electrostatic precipitator.
The lime paste is mainly using pulverized limestone and water by weight 5:2 are uniformly mixed.
The present invention operation principle be：Segment processing is carried out by flue gas, it is well arranged, it works well, it is effective to ensure
Energy-saving and emission-reduction have ensured atmospheric environment, while have used mist state reactant, whole to the treatment effect of flue gas outstanding, instead
The contact area bigger of agent and flue gas is answered, so as to improve treatment effeciency.
It is obvious to a person skilled in the art that the invention is not restricted to the details of above-mentioned exemplary embodiment, Er Qie
In the case of 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
Profit requirement rather than above description limit, it is intended that all by what is fallen within the meaning and scope of the equivalent requirements of the claims
Variation is included within the present invention.
Claims (3)
- A kind of 1. method of coal desulfurization denitration, which is characterized in that specifically include following steps：S1, coal flue gas is exchanged heat by plate heat exchanger, the temperature of flue gas is 40-55 DEG C after heat exchange；S2, by after heat exchange flue gas import using urea as the denitrating tower of denitrfying agent in, the inside of denitrating tower passes through circulating fan It realizes internal gas Xun Huan, the concentration of emission of NOx is reduced with this, the flue gas after reaction is sent into via pipeline in desulfurizing tower；After S3, flue gas are discharged into the process of desulfurizing tower, are sprayed using spraying device amount hydrogen peroxide in the form of mist state, utilize mist state pair NOx in hydrogen peroxide flue gas carries out further oxidation and denitration, and hydrogen peroxide sprays the time as 15-35min；S4, mixed from the top of desulfurizing tower by lime paste and compressed air in ejection desulfurizing tower, using the lime paste of mist state to cigarette Gas carries out desulfurization process, and the spray time of lime paste is 3-5min；S5, the hydrogen peroxide after reacting and lime paste are collected to be multiplexed；S6, the flue gas after desulfurization is sent into bag filter, by the dedusting of bag filter, is finally discharged via chimney.
- 2. the method for coal desulfurization denitration according to claim 1, which is characterized in that bag filter can pass through electrostatic Deduster substitutes.
- 3. the method for coal desulfurization denitration according to claim 1, which is characterized in that the lime paste mainly utilizes stone Ashes and water are by weight 5:2 are uniformly mixed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711296855.3A CN108097010A (en) | 2017-12-08 | 2017-12-08 | A kind of method of coal desulfurization denitration |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711296855.3A CN108097010A (en) | 2017-12-08 | 2017-12-08 | A kind of method of coal desulfurization denitration |
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| CN108097010A true CN108097010A (en) | 2018-06-01 |
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| CN201711296855.3A Pending CN108097010A (en) | 2017-12-08 | 2017-12-08 | A kind of method of coal desulfurization denitration |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101352647A (en) * | 2008-09-08 | 2009-01-28 | 环境保护部华南环境科学研究所 | Simultaneous desulfuration and denitration technique by wet flue gas method |
| KR101236782B1 (en) * | 2011-12-19 | 2013-02-28 | 에스코 주식회사 | A smoke reduction apparatus of a exhaust gas |
| CN103785275A (en) * | 2014-01-23 | 2014-05-14 | 冀文平 | Desulfurization, dedusting and denitration integrated flue-gas purifier |
| CN104874288A (en) * | 2015-07-01 | 2015-09-02 | 杜小卫 | Kiln tail gas treatment method |
| CN106943857A (en) * | 2017-05-04 | 2017-07-14 | 山东尚同陶瓷集团有限公司 | Flue gas desulfurization denitration dust-removing system and desulphurization denitration dust collection method |
-
2017
- 2017-12-08 CN CN201711296855.3A patent/CN108097010A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101352647A (en) * | 2008-09-08 | 2009-01-28 | 环境保护部华南环境科学研究所 | Simultaneous desulfuration and denitration technique by wet flue gas method |
| KR101236782B1 (en) * | 2011-12-19 | 2013-02-28 | 에스코 주식회사 | A smoke reduction apparatus of a exhaust gas |
| CN103785275A (en) * | 2014-01-23 | 2014-05-14 | 冀文平 | Desulfurization, dedusting and denitration integrated flue-gas purifier |
| CN104874288A (en) * | 2015-07-01 | 2015-09-02 | 杜小卫 | Kiln tail gas treatment method |
| CN106943857A (en) * | 2017-05-04 | 2017-07-14 | 山东尚同陶瓷集团有限公司 | Flue gas desulfurization denitration dust-removing system and desulphurization denitration dust collection method |
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