CN107519762A - A kind of clean type coke oven flue gas desulfurization denitration method and application - Google Patents
A kind of clean type coke oven flue gas desulfurization denitration method and application Download PDFInfo
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- CN107519762A CN107519762A CN201710950868.1A CN201710950868A CN107519762A CN 107519762 A CN107519762 A CN 107519762A CN 201710950868 A CN201710950868 A CN 201710950868A CN 107519762 A CN107519762 A CN 107519762A
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- flue gas
- oven flue
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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
- B01D53/869—Multiple step processes
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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
- B01D53/8603—Removing sulfur compounds
- B01D53/8609—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
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8621—Removing nitrogen compounds
- B01D53/8625—Nitrogen oxides
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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
- B01D2251/2062—Ammonia
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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
- B01D2251/20—Reductants
- B01D2251/208—Hydrocarbons
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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
- B01D2255/206—Rare earth metals
- B01D2255/2065—Cerium
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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
Abstract
The invention provides a kind of clean type coke oven flue gas desulfurization denitration method and application, clean type coke oven flue gas desulfurization denitration method of the present invention, using the processing method of first desulfurization denitration again, technique is simple, high treating effect, does not produce secondary solid discarded object and Aerosol Pollution, and investment and operating cost reduce, it is energy-saving, suitable for large-scale promotion.Clean type coke oven flue gas desulfurization denitration method of the present invention is available for coke oven exhaust gas processing, and technique is simple, and no secondary solid discarded object and aerosol produce, green high-efficient, high financial profit.
Description
Technical field
The present invention relates to coke oven flue gas processing technology field, is taken off in particular to a kind of clean type coke oven flue gas desulfurization
Nitre method and application.
Background technology
Coke oven flue gas is the mixture of gas and flue dust, is the main reason for polluting residential block air.The composition of flue gas is very
Complexity, gas include water vapour, sulfur dioxide, nitrogen, oxygen, carbon monoxide, carbon dioxide, hydrocarbon and nitrogen oxygen
Compound etc., flue dust include ash content, coal grain, oil droplet and high-temperature split product of fuel etc..
In correlation technique, coke oven flue gas desulfurization uses the conventional arts such as ammonia process, limestone-gypsum method, although sloughing
SO2, but secondary solid waste sulphur gypsum of generation etc. and aerosol pollute environment again, the escaping of ammonia is even more that accidents happened repeatly；Coking denitration
Start late, because flue-gas temperature is 260 DEG C or so, if after using the desulfurization of above method elder generation, flue-gas temperature can be reduced to 100
Below DEG C, it is impossible to using widely used high temperature SCR (SCR) technology of current power industry.Although at present
Existing research institution releases 260 DEG C or so of SCR denitration, but due to holding during coke oven flue gas complicated component flue gas elder generation's denitration
Catalyst blockage and poisoning are easily caused, limits its application on cock-oven gas purifying.If improve flue-gas temperature increases again
Power consumption.
In view of this, it is special to propose the present invention.
The content of the invention
The first object of the present invention is to provide a kind of clean type coke oven flue gas desulfurization denitration method, the letter of this method technique
It is single, high treating effect, secondary solid discarded object and Aerosol Pollution is not produced, investment and operating cost reduce, energy-saving, fit
In large-scale promotion.
The second object of the present invention is to provide a kind of application of clean type coke oven flue gas desulfurization denitration method, and this method can
For coke oven exhaust gas processing, technique is simple, and no secondary solid discarded object and aerosol produce, green high-efficient, high financial profit.
In order to realize the above-mentioned purpose of the present invention, spy uses following technical scheme：
A kind of clean type coke oven flue gas desulfurization denitration method, denitration will be carried out again after the desulfurization of coke oven flue gas elder generation.
Clean type coke oven flue gas desulfurization denitration method of the present invention, using the processing method of first desulfurization denitration again, technique is simple,
High treating effect, secondary solid discarded object and Aerosol Pollution is not produced, investment and operating cost reduce, energy-saving, are suitable to
Large-scale promotion.
Alternatively, the desulfurization of the coke oven flue gas includes dedusting, quenched and circulation catalytic desulfurization.
Alternatively, the denitration of the coke oven flue gas include desulfurization after coke oven flue gas mixed with reducing agent it is quenched, it is laggard
Row denitration.
Alternatively, the reducing agent includes the one or more in hydrocarbon and hydronitrogen, preferably includes first
One or more in alkane, propane, ammonia and urea.
Alternatively, the temperature of the coke oven flue gas is 220-300 DEG C.
Alternatively, the coke oven flue gas carries out desulfurization operations again after heat exchange.
Alternatively, the coke oven flue gas temperature after heat exchange is 130-165 DEG C.
Alternatively, the temperature of coke oven flue gas is 130-165 DEG C in dust removal process.
Alternatively, the temperature of coke oven flue gas is 130-165 DEG C during quenched.
Alternatively, the temperature of coke oven flue gas is 160-165 DEG C during catalytic desulfurization is circulated.
Alternatively, used catalyst includes manganese systems metal and its oxide and cerium during the circulation catalytic desulfurization
It is the one or more in metal and its oxide.
Alternatively, the catalyst is supported on carrier.
Alternatively, the carrier includes carbon based material.
Alternatively, the carbon based material includes activated carbon.
Alternatively, the activated carbon includes the one or more in coal activated carbon and wooden activated carbon.
Alternatively, the wooden activated carbon includes the one or more in coconut husk preparing active carbon and bamboo fibre preparing active carbon.
Alternatively, the coke oven flue gas after the desulfurization mixed with reducing agent it is quenched during coke oven flue gas temperature be 130-
165℃。
Alternatively, coke oven flue gas temperature is 130-165 DEG C in the denitrification process.
Alternatively, the catalyst employed in the denitrification process include manganese systems metal and its oxide and cerium system metal and
One or more in its oxide.
A kind of application of the above-mentioned clean type coke oven flue gas desulfurization denitration method in coke oven exhaust gas processing.
Clean type coke oven flue gas desulfurization denitration method of the present invention is available for coke oven exhaust gas processing, and technique is simple, without secondary solid
Body discarded object and aerosol produce, green high-efficient, high financial profit.
Compared with prior art, beneficial effects of the present invention are：
Clean type coke oven flue gas desulfurization denitration method of the present invention, using the processing method of first desulfurization denitration again, technique is simple,
High treating effect, secondary solid discarded object and Aerosol Pollution is not produced, investment and operating cost reduce, energy-saving, are suitable to
Large-scale promotion.Clean type coke oven flue gas desulfurization denitration method of the present invention is available for coke oven exhaust gas processing, and technique is simple, without secondary
Solid waste and aerosol produce, green high-efficient, high financial profit.
Brief description of the drawings
, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical scheme of the prior art
The required accompanying drawing used is briefly described in embodiment or description of the prior art, it should be apparent that, in describing below
Accompanying drawing is some embodiments of the present invention, for those of ordinary skill in the art, before creative work is not paid
Put, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is a kind of desulfurization process of the clean type coke oven flue gas desulfurization denitration method of embodiment of the present invention
Figure.
Fig. 2 is a kind of denitrating technique flow of the clean type coke oven flue gas desulfurization denitration method of embodiment of the present invention
Figure.
Embodiment
Technical scheme is clearly and completely described below in conjunction with the drawings and specific embodiments, but
Be it will be understood to those of skill in the art that following described embodiment is part of the embodiment of the present invention, it is rather than whole
Embodiment, the present invention is merely to illustrate, and is not construed as limiting the scope of the present invention.Based on the embodiment in the present invention, ability
The every other embodiment that domain those of ordinary skill is obtained under the premise of creative work is not made, belongs to guarantor of the present invention
The scope of shield.Unreceipted actual conditions person in embodiment, the condition suggested according to normal condition or manufacturer are carried out.Agents useful for same
Or the unreceipted production firm person of instrument, it is the conventional products that can be obtained by commercially available purchase.
In the description of the invention, it is necessary to explanation, term " " center ", " on ", " under ", "left", "right", " vertical ",
The orientation or position relationship of the instruction such as " level ", " interior ", " outer " be based on orientation shown in the drawings or position relationship, merely to
Be easy to the description present invention and simplify description, rather than instruction or imply signified device or element must have specific orientation,
With specific azimuth configuration and operation, therefore it is not considered as limiting the invention.In addition, term " first ", " second ",
" the 3rd " is only used for describing purpose, and it is not intended that instruction or hint relative importance.
In the description of the invention, it is necessary to illustrate, unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or be integrally connected；Can
To be mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected by intermediary, Ke Yishi
The connection of two element internals.For the ordinary skill in the art, with concrete condition above-mentioned term can be understood at this
Concrete meaning in invention.
The specific embodiment of the invention provides a kind of clean type coke oven flue gas desulfurization denitration method, and coke oven flue gas is first taken off
Denitration is carried out after sulphur again.
Clean type coke oven flue gas desulfurization denitration method of the present invention, using the processing method of first desulfurization denitration again, technique is simple,
High treating effect, secondary solid discarded object and Aerosol Pollution is not produced, investment and operating cost reduce, energy-saving, are suitable to
Large-scale promotion.
In a kind of preferred embodiment of the present invention, the desulfurization of the coke oven flue gas includes dedusting, quenched and circulation
Catalytic desulfurization.
In a kind of preferred embodiment of the present invention, the denitration of the coke oven flue gas includes the coke oven flue gas after desulfurization
Mixed with reducing agent quenched, carry out denitration afterwards.
In a kind of preferred embodiment of the present invention, the reducing agent is included in hydrocarbon and hydronitrogen
One or more, preferably include the one or more in methane, propane, ammonia and urea.
In a kind of preferred embodiment of the present invention, the temperature of the coke oven flue gas is 220-300 DEG C.
In a kind of preferred embodiment of the present invention, the coke oven flue gas is carried out after (waste heat recovery) again by exchanging heat
Desulfurization operations.
In a kind of preferred embodiment of the present invention, the coke oven flue gas temperature after heat exchange is 130-165
℃。
In a kind of preferred embodiment of the present invention, the temperature of coke oven flue gas is 130-165 DEG C in dust removal process.
In a kind of preferred embodiment of the present invention, the temperature of coke oven flue gas is 130-165 DEG C during quenched.
In a kind of preferred embodiment of the present invention, the temperature of coke oven flue gas is during catalytic desulfurization is circulated
160-165℃。
In a kind of preferred embodiment of the present invention, used catalyst bag during the circulation catalytic desulfurization
Include the one or more in manganese systems metal and its oxide and cerium system metal and its oxide.
In a kind of preferred embodiment of the present invention, the catalyst is supported on carrier.
In a kind of preferred embodiment of the present invention, the carrier includes carbon based material.
In a kind of preferred embodiment of the present invention, the carbon based material includes activated carbon.
In a kind of preferred embodiment of the present invention, the activated carbon is included in coal activated carbon and wooden activated carbon
One or more.
In a kind of preferred embodiment of the present invention, the wooden activated carbon includes coconut husk preparing active carbon and bamboo fibre
One or more in preparing active carbon.
Using activated carbon as carrier supported catalyst, make the adsorption function of its both active charcoal, there is catalyst again
Catalysis.SO in coke oven flue gas2、H2O、O2It is attracted in the hole of catalyst, under the catalytic action of active component
It is changed into active molecule, simultaneous reactions generation H2SO4.The sulfuric acid of catalytic reaction generation is enriched in charcoal datum hole gap, works as desulfurization
A period of time hole energy sulfuric acid regenerates after reaching saturation, discharges the active sites of catalyst, and the desulphurizing ability of catalyst obtains extensive
It is multiple.
Inventive desulfurization mechanism is as follows：
SO2(g)→SO2 *
O2(g)→O2 *
H2O(g)→H2O*
SO2 *+O2 *→SO3 *
SO3 *+H2O*→H2SO4 *
A kind of sulfur removal technology of embodiment coke-stove gas of the present invention as shown in figure 1, coke oven flue gas first by blower fan
It is sent into pretreatment system and carries out dedusting, quenched, the indexs such as the temperature of flue gas, dust concentration, moisture, oxygen concentration is met desulfurization work
Skill requirement, subsequently into desulfurizing tower desulfurization.Desulfurizing tower is divided into multiple regions, and a certain amount of desulfurizing agent, flue gas are loaded in each region
Enter desulfurization zone through gas distributing pipeline, during by desulfurization oxidant layer, the SO in flue gas2、O2、H2O molecules are desulfurized agent and catch and generate sulphur
Acid.After desulfurization for a period of time, desulfurizing agent is regenerated.To ensure that sour quality reduces water consumption simultaneously, step regeneration side is taken
Formula.Certain density sulfuric acid product is obtained with the sulfuric acid scrubbing desulfurization oxidant layer of various concentrations gradient, is finally washed again with clear water, is protected
It is thorough to demonstrate,prove desulfurizer regeneration.After regeneration ending, desulfurizing agent desulphurizing ability is restored, a complete desulfurization regeneration cycle knot
Beam, wait and enter next desulfurization cycle.
Whole system is made up of fume collection part, preprocessing part, disengagement section, acid recovery part.Fume collection portion
Divide main flue, valve, blower fan, chimney composition；Preprocessing part is mainly made up of deduster, tempering tower etc., desulfurization portion
It is desulfurizing tower (including desulfurizing agent) to divide capital equipment；Acid recovery part is mainly by sour ponds at different levels, sulfuric acid pipeline, regeneration pump, finished product
Sour pump and diluted acid refining system composition.
In a kind of preferred embodiment of the present invention, the coke oven flue gas after the desulfurization mixes quenched mistake with reducing agent
Coke oven flue gas temperature is 130-165 DEG C in journey.
In a kind of preferred embodiment of the present invention, coke oven flue gas temperature is 130-165 DEG C in the denitrification process.
In a kind of preferred embodiment of the present invention, the catalyst employed in the denitrification process includes manganese systems gold
One or more in category and its oxide and cerium system metal and its oxide.
The denitrating technique principle of coke oven flue gas of the present invention is selective using reducing agent mainly in the presence of catalyst
The N for being reacted with the NOx in flue gas and generating nontoxic pollution-free2And H2O.With NH3Exemplified by reducing agent, reaction equation is as follows：
4NH3+4NO+O2→4N2+6H2O (1-1)
4NH3+2NO2+O2→3N2+6H2O (1-2)
8NH3+6NO2→7N2+12H2O (1-3)
The denitrating technique of coke oven flue gas of the present invention can use it is low-temperature catalyzed, it is high different from traditional vanadium tungsten Titanium series catalyst
Up to 400 DEG C of initiation temperature, catalyst of the present invention can possess good activity at 120 DEG C, and its Applicable temperature window is 90-
200℃。
A kind of denitrating technique of embodiment coke-stove gas of the present invention is as shown in Fig. 2 pending flue gas (can be removed first
Dirt) blender is sent into by blower fan first mixes with reducing agent quenched, make the indexs such as temperature, oxygen and the reductant concentration of flue gas satisfaction
Denitrating technique requirement, denitration is carried out subsequently into denitrating tower.Overall or in bulk catalyst is loaded in denitrating tower, flue gas is through cloth
Feed channel enters denitration region, during by catalyst layer, NO, O in flue gas2、NH3Fully basis, in the catalytic action of catalyst
Under, NO is reduced into N2And H2O, can direct qualified discharge by the denitration coke oven flue gas after bed.
The service life of denitrating catalyst is generally 3-5, it is necessary to be changed after catalyst inactivation, and what is inactivated urges
Agent can return factory and be regenerated and re-activation, recycle.
Whole system is made up of fume collection part, preprocessing part, denitration part, reducing agent source part.Fume collection
The main flue in part, valve, blower fan, chimney composition；Preprocessing part is mainly made up of tempering tower etc., and denitration part is main
Equipment is denitrating tower (including catalyst)；Reducing agent source part is mainly reducing agent storage tank, evaporation equipment and buffer device composition.
It will be appreciated by those skilled in the art that fine de-sulfur tower can be replaced desulfurization regeneration Sulphuric acid device in Fig. 1 in Fig. 2,
Coke oven flue gas also can be in dedusting, quenched rear progress desulfurization.
A kind of application of the above-mentioned clean type coke oven flue gas desulfurization denitration method in coke oven exhaust gas processing.
Clean type coke oven flue gas desulfurization denitration method of the present invention is available for coke oven exhaust gas processing, and technique is simple, without secondary solid
Body discarded object and aerosol produce, green high-efficient, high financial profit.
Embodiment 1
A kind of clean type coke oven flue gas desulfurization denitration method, comprises the following steps：
A. the coke oven flue gas after exchanging heat is sent into pretreatment system by blower fan first and carries out dedusting, quenched, makes coke oven flue gas
130-135 DEG C of temperature, dust concentration≤30mg/m3Meet sulfur removal technology requirement etc. index, circulated subsequently into desulfurizing tower
Catalytic desulfurization obtains sulfuric acid and desulfurization coke oven flue gas；Gained part of sulfuric acid returns to coke oven；Gained part of sulfuric acid be used for it is civilian or its
He；The discharge of gained desulfurization coke oven flue gas carries out subsequent treatment；
The temperature of coke oven flue gas is 220-230 DEG C；
Coke oven flue gas temperature after heat exchange is 130-135 DEG C；
The temperature of coke oven flue gas is 130-135 DEG C in dust removal process；
The temperature of coke oven flue gas is 130-135 DEG C during quenched；
The temperature of coke oven flue gas is 130-135 DEG C during catalytic desulfurization is circulated；
B. the NH in liquid ammonia storage tank3After evaporator evaporation and air mixed diluting, the desulfurization coke oven cigarette with step a discharges
Gas is mixed into blender, mix quenched, makes 130-135 DEG C of temperature, the ammonia of flue gas：Nitrogen (mol ratio)=1:The index such as 1
Meet denitrating technique requirement, carry out denitration subsequently into denitrating tower, gained denitration coke oven flue gas can direct qualified discharge；
Coke oven flue gas temperature is 130-135 DEG C during mixing is quenched；
Coke oven flue gas temperature is 130-135 DEG C in denitrification process.
Embodiment 2
A kind of clean type coke oven flue gas desulfurization denitration method, comprises the following steps：
A. the coke oven flue gas after exchanging heat is sent into pretreatment system by blower fan first and carries out dedusting, quenched, makes coke oven flue gas
160-165 DEG C of temperature, dust concentration≤30mg/m3Meet sulfur removal technology requirement etc. index, circulated subsequently into desulfurizing tower
Catalytic desulfurization obtains sulfuric acid and desulfurization coke oven flue gas；Gained part of sulfuric acid returns to coke oven；Gained part of sulfuric acid be used for it is civilian or its
He；The discharge of gained desulfurization coke oven flue gas carries out subsequent treatment；
The temperature of coke oven flue gas is 290-300 DEG C；
Coke oven flue gas temperature after heat exchange is 160-165 DEG C；
The temperature of coke oven flue gas is 160-165 DEG C in dust removal process；
The temperature of coke oven flue gas is 160-165 DEG C during quenched；
The temperature of coke oven flue gas is 160-165 DEG C during catalytic desulfurization is circulated；
B. the NH in liquid ammonia storage tank3After evaporator evaporation and air mixed diluting, the desulfurization coke oven cigarette with step a discharges
Gas is mixed into blender, mix quenched, makes 160-165 DEG C of temperature, the ammonia of flue gas：Nitrogen (mol ratio)=1:The index such as 1
Meet denitrating technique requirement, carry out denitration subsequently into denitrating tower, gained denitration coke oven flue gas can direct qualified discharge；
Coke oven flue gas temperature is 160-165 DEG C during mixing is quenched；
Coke oven flue gas temperature is 160-165 DEG C in denitrification process.
Coke oven flue gas is detected after coke oven flue gas and desulphurization denitration after heat exchanging respectively, and acquired results are as shown in table 1：
The coke oven flue gas desulfurization off sulfide effect of the present invention of table 1
It can be seen from Table 1 that clean type coke oven flue gas desulfurization denitration method excellent effect of the present invention, sufficiently lower Jiao
Dust, SO in kiln gas2And NOXContent, desulphurization denitration flue gas can direct qualified discharge, whole technical process is without secondary solid
Discarded object and aerosol produce, green high-efficient, high financial profit.
Inventive desulfurization method major advantage includes：(1) high treating effect；(2) strong adaptability；(3) technological process is simple；
(4) stability is high；(5) economic benefit is obvious.
The out of stock method major advantage of the present invention includes：(1) reaction temperature is low；(2) denitration efficiency is high；(3) it is energy-saving；
(4) mithridatism is strong；(5) investment and operating cost reduce.
Inventive desulfurization method of denitration major advantage includes：1st, process innovation, it is out of stock after first desulfurization；2、SO2Adsorption and oxidation
Relieving haperacidity recycling economy；3rd, the out of stock green high-efficient of low temperature；4th, operating cost is lower than tradition 2-4 times；5th, without secondary solid discarded object and
Aerosol Pollution.
Although illustrate and describing the present invention with specific embodiment, but it will be appreciated that various embodiments above is only used
To illustrate technical scheme, rather than its limitations；It will be understood by those within the art that：Without departing substantially from this hair
In the case of bright spirit and scope, the technical scheme described in foregoing embodiments can be modified, or to wherein
Some or all of technical characteristic carries out equivalent substitution；And these are changed or are replaced, the essence of appropriate technical solution is not made
Depart from the scope of various embodiments of the present invention technical scheme；It is, therefore, intended that include belonging to the present invention in the following claims
In the range of all these substitutions and modifications.
Claims (10)
1. a kind of clean type coke oven flue gas desulfurization denitration method, it is characterised in that denitration will be carried out again after the desulfurization of coke oven flue gas elder generation.
A kind of 2. clean type coke oven flue gas desulfurization denitration method according to claim 1, it is characterised in that the coke oven cigarette
The desulfurization of gas includes dedusting, quenched and circulation catalytic desulfurization.
A kind of 3. clean type coke oven flue gas desulfurization denitration method according to claim 1, it is characterised in that the coke oven cigarette
The coke oven flue gas that the denitration of gas includes after desulfurization mixes quenched with reducing agent, carries out denitration afterwards；
Alternatively, the reducing agent includes the one or more in hydrocarbon and hydronitrogen, preferably includes methane, third
One or more in alkane, ammonia and urea.
A kind of 4. clean type coke oven flue gas desulfurization denitration method according to claim 1, it is characterised in that the coke oven cigarette
The temperature of gas is 220-300 DEG C.
A kind of 5. clean type coke oven flue gas desulfurization denitration method according to claim 1, it is characterised in that the coke oven cigarette
Gas carries out desulfurization operations again after heat exchange；
Alternatively, the coke oven flue gas temperature after heat exchange is 130-165 DEG C.
6. a kind of clean type coke oven flue gas desulfurization denitration method according to claim 1, it is characterised in that in dust removal process
The temperature of middle coke oven flue gas is 130-165 DEG C；
Alternatively, the temperature of coke oven flue gas is 130-165 DEG C during quenched；
Alternatively, the temperature of coke oven flue gas is 160-165 DEG C during catalytic desulfurization is circulated.
7. a kind of clean type coke oven flue gas desulfurization denitration method according to claim 2, it is characterised in that the circulation is urged
Changing the catalyst employed in sweetening process includes one kind in manganese systems metal and its oxide and cerium system metal and its oxide
It is or a variety of；
Alternatively, the catalyst is supported on carrier；
Alternatively, the carrier includes carbon based material；
Alternatively, the carbon based material includes activated carbon；
Alternatively, the activated carbon includes the one or more in coal activated carbon and wooden activated carbon；
Alternatively, the wooden activated carbon includes the one or more in coconut husk preparing active carbon and bamboo fibre preparing active carbon.
8. a kind of clean type coke oven flue gas desulfurization denitration method according to claim 1, it is characterised in that after the desulfurization
Coke oven flue gas mixed with reducing agent it is quenched during coke oven flue gas temperature be 130-165 DEG C；
Alternatively, coke oven flue gas temperature is 130-165 DEG C in the denitrification process.
A kind of 9. clean type coke oven flue gas desulfurization denitration method according to claim 1, it is characterised in that the denitration
Catalyst employed in journey includes the one or more in manganese systems metal and its oxide and cerium system metal and its oxide.
10. a kind of clean type coke oven flue gas desulfurization denitration method as described in claim 1-9 is any is in coke oven exhaust gas processing
Application.
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| CN108554171A (en) * | 2018-05-08 | 2018-09-21 | 杨大鹏 | A kind of industrial smoke purifying |
| CN108636080A (en) * | 2018-05-08 | 2018-10-12 | 杨大鹏 | A kind of desulfurizing industrial fume denitration device |
| CN108786399A (en) * | 2018-06-27 | 2018-11-13 | 山东瑞嘉通风环保科技有限公司 | A kind of clean type coke oven flue gas sulfur method and application |
| CN110496527A (en) * | 2018-05-16 | 2019-11-26 | 上海梅山钢铁股份有限公司 | A kind of method of coke oven flue exhuast gas desulfurization denitration |
| CN112881607A (en) * | 2021-01-19 | 2021-06-01 | 四川大学 | Multifunctional desulfurization and denitrification test system and application method thereof |
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| CN105327612A (en) * | 2015-09-25 | 2016-02-17 | 四川大学 | Flue gas low-temperature combined desulfurization and denitration technology method |
| CN106334443A (en) * | 2016-09-21 | 2017-01-18 | 东莞市联洲知识产权运营管理有限公司 | Low-temperature coke oven flue gas desulfurizing and denitrifying process |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108554171A (en) * | 2018-05-08 | 2018-09-21 | 杨大鹏 | A kind of industrial smoke purifying |
| CN108636080A (en) * | 2018-05-08 | 2018-10-12 | 杨大鹏 | A kind of desulfurizing industrial fume denitration device |
| CN110496527A (en) * | 2018-05-16 | 2019-11-26 | 上海梅山钢铁股份有限公司 | A kind of method of coke oven flue exhuast gas desulfurization denitration |
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| CN112881607A (en) * | 2021-01-19 | 2021-06-01 | 四川大学 | Multifunctional desulfurization and denitrification test system and application method thereof |
| CN112881607B (en) * | 2021-01-19 | 2022-08-09 | 四川大学 | Multifunctional desulfurization and denitrification test system and application method thereof |
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Application publication date: 20171229 |