CN107511064A - Desulfurization denitration method based on activated carbon and low temperature catalyst - Google Patents
Desulfurization denitration method based on activated carbon and low temperature catalyst Download PDFInfo
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- CN107511064A CN107511064A CN201710752326.3A CN201710752326A CN107511064A CN 107511064 A CN107511064 A CN 107511064A CN 201710752326 A CN201710752326 A CN 201710752326A CN 107511064 A CN107511064 A CN 107511064A
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- activated carbon
- flue gas
- low temperature
- temperature catalyst
- desulfurization denitration
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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
- B01D53/86—Catalytic processes
- B01D53/8637—Simultaneously removing sulfur oxides and nitrogen oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
- B01D50/20—Combinations of devices covered by groups B01D45/00 and B01D46/00
-
- 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
- B01D53/86—Catalytic processes
- B01D53/8621—Removing nitrogen compounds
- B01D53/8634—Ammonia
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/20—Metals or compounds thereof
- B01D2255/207—Transition metals
- B01D2255/2073—Manganese
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
The invention discloses a kind of desulfurization denitration method based on activated carbon and low temperature catalyst, comprise the following steps：(1) boiler smoke removes the dust in flue gas first by gravitational settling method；(2) flue gas for removing dust is sufficiently mixed with ammoniacal liquor；(3) be sufficiently mixed ammoniacal liquor flue gas enter in fluidized state activated carbon, carrier of a portion activated carbon as low temperature catalyst, NOX and NH3 will fully be reacted in the presence of low temperature catalyst, SO2 is adsorbed in the presence of activated carbon, and the NOX in flue gas and NH3 and SO2 is removed；(4) flue gas for removing NOX and NH3 and SO2 passes through centrifugal sedimentation, and the activated carbon carried in flue gas is removed, obtains the flue gas of removal activity charcoal.By the way that the carrier of low temperature catalyst is used into activated carbon, activated carbon is in fluidized state so that flue gas fully contacts with low temperature catalyst and activated carbon, realizes desulphurization denitration in one step.
Description
Technical field
The present invention relates to exhaust-gas treatment field, and in particular to a kind of desulphurization denitration side based on activated carbon and low temperature catalyst
Method.
Background technology
China contains very abundant coal resources, and maximum in the world coal production state and country of consumption.And
In China, 84% or so coal is directly burnt.It is substantial amounts of coal-fired, air pollution of the China based on coal smoke type is caused,
A large amount of SO2 and NOx are generated, the environmental pollution such as acid rain, greenhouse effects and depletion of the ozone layer caused by these pollutants, seriously
The living environment of the mankind is have impact on, causes the great attention of country, desulphurization denitration is carried out to flue gas has turned into a weight in China
Want task.
Into in the 1980s, people gradually recognize the desulphurization and denitration technology that is used alone, equipment is complicated, takes up an area face
Product is big, and investment and operating cost are high, and use desulfurization and denitrification integral equipment and technique then compact-sized, investment and operating cost
It is low.Combined desulfurization and denitration technology at present：Activated carbon method, SNOX techniques, NOXSO techniques, electronic beam method etc. are more ripe, but due to
Operating cost is higher to constrain its large-scale promotion application.
The content of the invention
It is an object of the invention to provide a kind of desulfurization denitration method based on activated carbon and low temperature catalyst.
To reach above-mentioned purpose, the technical solution adopted by the present invention is：It is a kind of de- based on activated carbon and low temperature catalyst
Sulphur method of denitration, comprises the following steps：
(1) boiler smoke removes the dust in flue gas first by gravitational settling method；
(2) flue gas for removing dust is sufficiently mixed with ammoniacal liquor；
(3) flue gas of ammoniacal liquor is sufficiently mixed into the activated carbon in fluidized state, and a portion activated carbon is as low temperature
The carrier of catalyst, NOX and NH3 will fully be reacted in the presence of low temperature catalyst, SO2 quilts in the presence of activated carbon
Absorption, the NOX in flue gas and NH3 and SO2 is removed；
(4) flue gas for removing NOX and NH3 and SO2 passes through centrifugal sedimentation, and the activated carbon carried in flue gas is removed, obtained
The flue gas of removal activity charcoal.
In above-mentioned technical proposal, the low temperature catalyst is MnOx.
In above-mentioned technical proposal, the MnOx is MnO2、Mn3O4And Mn2O3In one or more mixtures.
In above-mentioned technical proposal, the low temperature catalyst has 105-120m2/ g specific surface area.
In above-mentioned technical proposal, in step (1), boiler smoke is entered after sack cleaner filters by gas approach
Smoke-box, dust settles in smoke-box in flue gas gathers in taper ash bucket, and dust is periodically discharged by unloading valve.
In above-mentioned technical proposal, in step (2), ammoniacal liquor is sprayed into smoke-box by ammoniacal liquor import, and flue gas and ammoniacal liquor are in smoke-box
It is sufficiently mixed.
In above-mentioned technical proposal, in step (3), in step (3), drive of the flue gas in high velocity air of ammoniacal liquor is sufficiently mixed
It is lower to enter in fluidising chamber, fully contacted with the activated carbon in fluidized state.
In above-mentioned technical proposal, in step (3), reaction temperature is 100-200 DEG C.
In above-mentioned technical proposal, in step (4), removing NOX and NH3 and SO2 flue gas enters cyclone dust collectors, by flue gas
The activated carbon taken away is collected discharges regenerating unit by rotary discharge valve, and the flue gas of dedusting ash passes through cyclone dust collectors
On exhanst gas outlet emptying.
Because above-mentioned technical proposal is used, the present invention has following advantages compared with prior art：Base disclosed by the invention
In activated carbon and the desulfurization denitration method of low temperature catalyst, by the way that the carrier of low temperature catalyst is used into activated carbon, activated carbon is in
Fluidized state so that flue gas fully contacts with low temperature catalyst and activated carbon, realizes desulphurization denitration in one step, simultaneously living
Property charcoal and the activated carbon as the carrier of low temperature catalyst need not be separated in the later stage, be urged after can handling again as low temperature
The carrier of agent.
Brief description of the drawings
Fig. 1 is the structural representation of the desulfuring and denitrifying apparatus disclosed by the invention based on activated carbon and low temperature catalyst.
Wherein, 1, sack cleaner；2nd, smoke-box；3rd, fluidising chamber；4th, cyclone dust collectors；5th, taper ash bucket；6th, ammoniacal liquor source；7、
High velocity air source.
Embodiment
With reference to drawings and Examples, the invention will be further described：
Referring to Fig. 1, as shown in legend therein, a kind of desulfuring and denitrifying apparatus based on activated carbon and low temperature catalyst, wrap
The sack cleaner 1 being sequentially communicated, smoke-box 2, fluidising chamber 3 and cyclone dust collectors 4 are included, the wherein bottom of smoke-box 2 is provided with taper
Ash bucket 5 and one ammoniacal liquor source 6 of connection and high velocity air source 7.
A kind of desulfurization denitration method based on activated carbon and low temperature catalyst is described below, comprises the following steps：
(1) boiler smoke is passed through in smoke-box 2 after sack cleaner 1, by gravitational settling method in smoke-box 2, by cigarette
Dust removing in gas, dust enter in taper ash bucket 5；
(2) ammoniacal liquor in ammoniacal liquor source 6 is sprayed in smoke-box 2 so that the flue gas and ammoniacal liquor for removing dust are sufficiently mixed；
(3) high velocity air in high velocity air source 7 drives the activated carbon that the flue gas for being sufficiently mixed ammoniacal liquor enters in fluidising chamber 3
In, carrier of a portion activated carbon as low temperature catalyst, NOX and NH3 will be filled in the presence of low temperature catalyst
Divide reaction, SO2 is adsorbed in the presence of activated carbon, and the NOX in flue gas and NH3 and SO2 is removed；
(4) flue gas for removing NOX and NH3 and SO2 passes through centrifugal sedimentation, and the activated carbon carried in flue gas is removed, obtained
The flue gas of removal activity charcoal.
By the way that the carrier of low temperature catalyst is used into activated carbon, activated carbon is in fluidized state so that flue gas with it is low-temperature catalyzed
Agent and activated carbon fully contact, and realize desulphurization denitration, while activated carbon and the carrier as low temperature catalyst in one step
Activated carbon need not be separated in the later stage, the carrier after can handling again as low temperature catalyst.
In a kind of embodiment, low temperature catalyst MnO2。
In a kind of embodiment, low temperature catalyst Mn3O4。
In a kind of embodiment, low temperature catalyst Mn2O3。
In a kind of embodiment, low temperature catalyst has 105-120m2/ g specific surface area.
In a kind of embodiment, in step (1), boiler smoke is entered after sack cleaner filters by gas approach
Smoke-box, dust settles in smoke-box in flue gas gathers in taper ash bucket, and dust is periodically discharged by unloading valve.
In a kind of embodiment, in step (2), ammoniacal liquor is sprayed into smoke-box by ammoniacal liquor import, and flue gas and ammoniacal liquor are in smoke-box
It is sufficiently mixed.
In a kind of embodiment, in step (3), the flue gas for being sufficiently mixed ammoniacal liquor enters fluidisation under the drive of high velocity air
In room, fully contacted with the activated carbon in fluidized state.
In a kind of embodiment, in step (3), reaction temperature is 100-200 DEG C.
In a kind of embodiment, in step (4), removing NOX and NH3 and SO2 flue gas enters cyclone dust collectors, by flue gas
The activated carbon taken away is collected discharges regenerating unit by rotary discharge valve, and the flue gas of dedusting ash passes through cyclone dust collectors
On exhanst gas outlet emptying.
The foregoing description of the disclosed embodiments, professional and technical personnel in the field are enable to realize or using the present invention.
A variety of modifications to these embodiments will be apparent for those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, it is of the invention
The embodiments shown herein is not intended to be limited to, and is to fit to and principles disclosed herein and features of novelty phase one
The most wide scope caused.
Claims (9)
1. a kind of desulfurization denitration method based on activated carbon and low temperature catalyst, it is characterised in that comprise the following steps：
(1) boiler smoke removes the dust in flue gas first by gravitational settling method；
(2) flue gas for removing dust is sufficiently mixed with ammoniacal liquor；
(3) flue gas of ammoniacal liquor is sufficiently mixed into the activated carbon in fluidized state, and a portion activated carbon is as low-temperature catalyzed
The carrier of agent, NOX and NH3 will fully be reacted in the presence of low temperature catalyst, and SO2 is inhaled in the presence of activated carbon
It is attached, the NOX in flue gas and NH3 and SO2 is removed；
(4) flue gas for removing NOX and NH3 and SO2 passes through centrifugal sedimentation, and the activated carbon carried in flue gas is removed, removed
The flue gas of activated carbon.
2. the desulfurization denitration method according to claim 1 based on activated carbon and low temperature catalyst, it is characterised in that described
Low temperature catalyst is MnOx.
3. the desulfurization denitration method according to claim 2 based on activated carbon and low temperature catalyst, it is characterised in that described
MnOx is MnO2、Mn3O4And Mn2O3In one or more mixtures.
4. the desulfurization denitration method according to claim 2 based on activated carbon and low temperature catalyst, it is characterised in that described
Low temperature catalyst has 105-120m2/ g specific surface area.
5. the desulfurization denitration method according to claim 1 based on activated carbon and low temperature catalyst, it is characterised in that step
(1) in, boiler smoke enters smoke-box after sack cleaner filters by gas approach, and dust settles in smoke-box in flue gas
Gather in taper ash bucket, dust is periodically discharged by unloading valve.
6. the desulfurization denitration method according to claim 1 based on activated carbon and low temperature catalyst, it is characterised in that step
(2) in, ammoniacal liquor is sprayed into smoke-box by ammoniacal liquor import, and flue gas and ammoniacal liquor are sufficiently mixed in smoke-box.
7. the desulfurization denitration method according to claim 1 based on activated carbon and low temperature catalyst, it is characterised in that step
(3) in, in step (3), it is sufficiently mixed the flue gas of ammoniacal liquor and enters under the drive of high velocity air in fluidising chamber, and in fluidized state
Activated carbon fully contact.
8. the desulfurization denitration method according to claim 1 based on activated carbon and low temperature catalyst, it is characterised in that step
(3) in, reaction temperature is 100-200 DEG C.
9. the desulfurization denitration method according to claim 1 based on activated carbon and low temperature catalyst, it is characterised in that step
(4) in, removing NOX and NH3 and SO2 flue gas enters cyclone dust collectors, and the activated carbon taken away by flue gas, which is collected, to be got off to pass through
Rotary discharge valve discharges regenerating unit, and the flue gas of dedusting ash is emptied by the exhanst gas outlet on cyclone dust collectors.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710752326.3A CN107511064A (en) | 2017-08-28 | 2017-08-28 | Desulfurization denitration method based on activated carbon and low temperature catalyst |
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| CN201710752326.3A CN107511064A (en) | 2017-08-28 | 2017-08-28 | Desulfurization denitration method based on activated carbon and low temperature catalyst |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108499344A (en) * | 2018-06-14 | 2018-09-07 | 河北星耀环境科技有限公司 | A kind of biomass flue gas dust-removal and desulfurizing denitrating system |
| CN111111362A (en) * | 2019-12-28 | 2020-05-08 | 江苏新中金环保科技股份有限公司 | Flue gas desulfurization and denitrification complete equipment based on efficient catalysis technology |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108499344A (en) * | 2018-06-14 | 2018-09-07 | 河北星耀环境科技有限公司 | A kind of biomass flue gas dust-removal and desulfurizing denitrating system |
| CN111111362A (en) * | 2019-12-28 | 2020-05-08 | 江苏新中金环保科技股份有限公司 | Flue gas desulfurization and denitrification complete equipment based on efficient catalysis technology |
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