CN108499344A - A kind of biomass flue gas dust-removal and desulfurizing denitrating system - Google Patents

A kind of biomass flue gas dust-removal and desulfurizing denitrating system Download PDF

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Publication number
CN108499344A
CN108499344A CN201810614850.9A CN201810614850A CN108499344A CN 108499344 A CN108499344 A CN 108499344A CN 201810614850 A CN201810614850 A CN 201810614850A CN 108499344 A CN108499344 A CN 108499344A
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flue gas
activated carbon
removal
dust
gas outlet
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刘让
陈新
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Hebei Star Yew Environmental Technology Co Ltd
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Hebei Star Yew Environmental Technology Co Ltd
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Priority to CN201810614850.9A priority Critical patent/CN108499344A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/74General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/75Multi-step processes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D46/00Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/02Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
    • B01D46/023Pockets filters, i.e. multiple bag filters mounted on a common frame
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D46/00Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/02Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
    • B01D46/04Cleaning filters
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D46/00Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/42Auxiliary equipment or operation thereof
    • B01D46/48Removing dust other than cleaning filters, e.g. by using collecting trays
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/46Removing components of defined structure
    • B01D53/48Sulfur compounds
    • B01D53/50Sulfur oxides
    • B01D53/501Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
    • B01D53/504Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound characterised by a specific device
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/74General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/77Liquid phase processes
    • B01D53/78Liquid phase processes with gas-liquid contact
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/74General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86Catalytic processes
    • B01D53/8621Removing nitrogen compounds
    • B01D53/8625Nitrogen oxides
    • B01D53/8628Processes characterised by a specific catalyst
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/74General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86Catalytic processes
    • B01D53/8621Removing nitrogen compounds
    • B01D53/8625Nitrogen oxides
    • B01D53/8631Processes characterised by a specific device
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/74General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86Catalytic processes
    • B01D53/90Injecting reactants
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2255/00Catalysts
    • B01D2255/70Non-metallic catalysts, additives or dopants
    • B01D2255/702Carbon
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2258/00Sources of waste gases
    • B01D2258/02Other waste gases
    • B01D2258/0283Flue gases
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
    • Y02A50/2351Atmospheric particulate matter [PM], e.g. carbon smoke microparticles, smog, aerosol particles, dust

Abstract

The invention discloses a kind of biomass flue gas dust-removal and desulfurizing denitrating systems, including bag filter, activated carbon denitrification apparatus and desulfurizer, bag filter air inlet is connected to by mixed smoke-box with biomass boiler flue gas input pipe, and the gas outlet that flue gas after desulfurization feeds back pipe is connected to mixed smoke-box;It is equipped with dust-removal cloth-bag in the air-purifying chamber of bag filter, gas outlet is equipped at the top of air-purifying chamber, air-purifying chamber bottom end is equipped with ash bucket;The gas outlet of air-purifying chamber, ammonia input pipe are connected to by delivery pipe with the air inlet of mixer respectively, the gas outlet of mixer is connected to by delivery pipe with the air inlet of activated carbon denitrification apparatus, the gas outlet of activated carbon denitrification apparatus is connected to smoke stack emission pipe, the air inlet of activated carbon denitrification apparatus is connected to flue gas regeneration delivery pipe, the gas outlet of activated carbon denitrification apparatus is connected to the air inlet of desulfurizer, and gas outlet and the flue gas after desulfurization of desulfurizer feed back pipe and be connected to.The system cost is low, denitrating flue gas is more efficient, can reach the requirement of minimum discharge standard.

Description

A kind of biomass flue gas dust-removal and desulfurizing denitrating system
Technical field
The present invention relates to gaseous contamination processing units, are exactly a kind of biomass flue gas dust-removal and desulfurizing denitrating systems.
Background technology
Biomass boiler is a kind of using biomass energy as the boiler of fuel, and fuel biomass is a kind of renewable Using the energy, bio-energy pellet fuel is to utilize stalk, rice stalk, yule logs, sawdust, peanut shell, melon seed cases, beet pulp, tree The crops of all wastes such as skin squeeze the techniques such as drying through being pulverized and mixed, are eventually fabricated granular fuel.In its original of China Material is widely distributed, and processing technology is advanced, and biomass energy particle material is famous with green coal, is a kind of clear energy sources, raw simultaneously The price of substance boiler is relatively low and fuel cost is also low, is the novel energy of both economical environmental protection.But biomass is in combustion process In, it still will produce a large amount of dust, SO2And NOx pollutants, simultaneously because its dust, SO2, NOx and temperature problem so that Biomass boiler dedusting, desulphurization and denitration are difficult, and cost is very high, and the mode of the processing of gas cleaning at present mainly has:
Flue gas ash removal process:Due to biomass boiler, its water-in-fuel rate is higher, and ash content has very high viscosity, therefore It is difficult to handle flue gas using common bag filter, technique more mature at present is removed using cyclone dust removal+cloth bag The process of dirt removes a large amount of lightweight dust first with cyclone dust removal, while taking away the moisture in flue gas, recycles filtration velocity Lower bag filter carries out gas cleaning processing.To reach the qualified discharge of dust.
Flue gas desulfurization course:Since biomass boiler its primary combustion medium is biomass, sulfur content in flue gas It changes greatly, and overall sulfur content is relatively low, the SO in general flue gas2In 100~400mg/Nm3Between, content is low, at present state The biomass boiler of interior installation flue gas desulfurization is less, and more mature technique is to use limewash method flue gas desulfurization, utilizes lime Alkalinity, by the SO in flue gas2Purification generates by-product gypsum.Due to SO in flue gas2Concentration is very low, thus overall investment compared with It is high.
Denitrating flue gas process:Due to biomass boiler, its dust viscosity is higher, and contains the alkalinous metals such as Na, K in dust, It is affected to denitrating catalyst, and after dedusting, flue-gas temperature is low, does not have the temperature range for building SCR denitration system, because Domestic biomass boiler denitrating flue gas process generally uses SNCR to carry out gas cleaning at present for this, but SNCR systems its denitration effect Rate is low, and the escaping of ammonia is high, be easy to cause secondary pollution.And by dedusting after, then carry out flue gas heating SCR denitration if the energy disappear Consumption is too high, and economy is very poor, therefore biomass boiler denitrating flue gas process is currently without good solution.
Invention content
The technical problem to be solved in the present invention is to provide a kind of biomass flue gas dust-removal and desulfurizing denitrating system, the system flue gases Dedusting, desulphurization and denitration process are all completed after stove, and the influence to boiler is effectively reduced, simultaneously because SO2Richness is obtained Collection, desulphurization system cost substantially reduce, and exhaust gas dust property is improved, and dust pelletizing system cost can also reduce.Denitrating system Activated carbon catalysis reduction principle is utilized, no coupling product generates, and the escaping of ammonia is low, activated carbon no consumption itself, therefore operating cost It is relatively low, and denitrating flue gas is more efficient, can reach the requirement of minimum discharge standard.
In order to solve the above technical problems, the present invention uses following technological means:
A kind of biomass flue gas dust-removal and desulfurizing denitrating system, including bag filter, activated carbon denitrification apparatus and desulfurization dress It sets, bag filter air inlet is connected to by mixed smoke-box with biomass boiler flue gas input pipe, and flue gas after desulfurization feeds back going out for pipe Gas port is connected to mixed smoke-box;It is equipped with dust-removal cloth-bag in the air-purifying chamber of bag filter, gas outlet, air-purifying chamber are equipped at the top of air-purifying chamber Bottom end is equipped with ash bucket;The gas outlet of air-purifying chamber, ammonia input pipe are connected to by delivery pipe with the air inlet of mixer respectively, mixer Gas outlet be connected to the air inlet of activated carbon denitrification apparatus by delivery pipe, the gas outlet of activated carbon denitrification apparatus is arranged with chimney Put pipe connection, the air inlet of activated carbon denitrification apparatus is connected to flue gas regeneration delivery pipe, the gas outlet of activated carbon denitrification apparatus and The air inlet of desulfurizer is connected to, and gas outlet and the flue gas after desulfurization of desulfurizer feed back pipe and be connected to.
Using the present invention of above-mentioned technical proposal, compared with prior art, the feature protruded is:
Flue gas ash removal, desulphurization and denitration process are all completed after stove, and the influence to boiler is effectively reduced, simultaneously because SO2It is enriched with, desulphurization system cost substantially reduces, and exhaust gas dust property is improved, and dust pelletizing system cost can also drop It is low.Activated carbon catalysis reduction principle is utilized in denitrating system, and no coupling product generates, and the escaping of ammonia is low, activated carbon no consumption itself, because This operating cost is relatively low, and denitrating flue gas is more efficient, can reach the requirement of minimum discharge standard.
Further optimal technical scheme is as follows:
Biomass boiler original flue gas is mixed by the flue gas after feeding back the desulfurization of pipe conveying with flue gas after desulfurization first, makes cigarette Dust in gas is modified, while flue gas moisture content significantly declines, and is conducive to remove, and mixed flue gas is removed by cloth bag Dirt device, bag filter use offline van-type pulse dust collector, flue gas to enter bag filter, filtration velocity control by raising middle flask Major part exhaust gas dust can remove by the filtration of dust-removal cloth-bag in 0.8m/s, clean flue gas is collected from air-purifying chamber Into subordinate's purification system, ashes point is collected by ash bucket and regular outer row.
Top in the air-purifying chamber is equipped with voltage stabilizing gas bag, and compressed air input pipe passes through voltage stabilizing gas bag and dust-removal cloth-bag Connection.
It works after a period of time, impulse soot blowing is carried out to dust-removal cloth-bag using compressed air input pipe, with 4 voltage stabilizing gas bags Voltage stabilizing is carried out, the ash that dust-removal cloth-bag is assembled is blown off into ash bucket, realizes entire dust subtractive process.
The activated carbon denitrification apparatus is equipped with the activated charcoal unit that can work independently connected side by side, each activated carbon list There is the work of separate valve control activated charcoal unit before and after the unit process case of member.
Above-mentioned setting is, it can be achieved that any one activated charcoal unit works online, or is stopped offline, convenient for according to flue gas Actual conditions carry out cooperating.
Multilayer active carbon filler is set in the activated charcoal unit.
In each activated charcoal unit, 8 active carbon filler of multilayer is set by processing capacity, activated carbon is to SO2There is extremely strong suction Attached effect, can be to low concentration SO in flue gas2It is adsorbed, reaches very low discharge standard, while activated carbon can be used as and urge Agent utilizes the NH in flue gas3NO in flue gas is restored.Its temperature is just in activated carbon catalysis reduction denitration most Good reaction temperature section, desulfurization and denitration efficiency are higher.Desulfurization and the dust removal process of flue gas may be implemented.
Flow straightening grid is arranged in front end in the unit process case of each activated charcoal unit.
Flow straightening grid is arranged in front end in unit process case, and flue gas is carried out rectification, stablizes flue gas flow field, overall activity charcoal Squarely or original shape reactor, vertical or horizontal installation is arranged in unit.
The unit process case of the activated charcoal unit is front and back to be arranged temperature and pressure sensor.
By the way that temperature and pressure sensor is arranged, it is monitored convenient for the parameter to gas.
It is connected to flue gas regeneration delivery pipe before the unit process case of the activated charcoal unit.
Since activated carbon is to SO2There is Preferential adsorption effect, so excessive absorption SO2Activated carbon catalysis reduction can be caused de- Nitre efficiency declines, and therefore, after a period of time, needs to carry out flue gas regeneration one by one to activated carbon case, flue gas regeneration uses 350 DEG C of cigarettes 6 activated charcoal unit of gas pair regenerates, the SO adsorbed in activated carbon2It can be parsed, SO in the flue gas after parsing2Content can be rich 30 times of collection or more, concentration is up to 6000mg/Nm3More than, parsing exhaust gas volumn is small, therefore the desulfurizing tower of very little is only needed to can be realized Flue gas desulfurization course, the desulfuration efficiency of flue gas desulfurization course do not require too high yet, can effectively reduce Ca/S ratios in this way, reduce desulfurization System building and operating cost.
Active layer, spraying layer are equipped in the desulfurizer, active layer is set to above spraying layer, active layer, spraying Layer is connected to technique water inlet pipe, liquid caustic soda input pipe respectively.
Lye (urea, milk of lime, sodium carbonate) is sprayed into desulfurizing tower, it is by layer of spraying, alkalinity is molten in desulfurizing tower Liquid carries out injection and carries out Dry FGD;The active layer of upper layer setting, active layer are activated using process water, are further dropped Low reaction temperatures promote desulfuration efficiency.After regenerated flue gas is by purification, SO2Concentration can be reduced to 200~400mg/Nm3Left and right, Identical as the original smoke density of biomass boiler, regenerated flue gas is incorporated to purification system front end later, and dust pelletizing system efficiency can be improved, Simultaneously as regenerated flue gas temperature is higher, the flue-gas temperature into bag filter can also be improved, makes flue gas in dew-point temperature More than, reduce the failures such as bag filter cloth bag knot ash.
The air inlet of the desulfurizer is connected to by inlet cooling device with the gas outlet of activated carbon denitrification apparatus.
The sweetening process of regenerated flue gas, using semi-dry process flue gas desulphurization process, some processes water is sprayed into because temperature is higher Desulfurizing tower carries out flue gas cooling and activation in advance, to improve treatment effect.
Description of the drawings
Fig. 1 is the structural schematic diagram of the present invention.
Reference sign:1- bag filters;2- ash buckets;3- dust-removal cloth-bags;4- air-purifying chambers;Cigarette after 5- desulfurization Gas feeds back pipe;6- smoke stack emission pipes;7- inlet cooling devices;8- desulfurizers;9- spraying layers;10- active layers;11- Active carbon filler;12- activated charcoal units;13- flow straightening grids;14- mixers;15- voltage stabilizing gas bags;16- process waters input Pipe;17- liquid caustic soda input pipes;18- flue gases regenerate delivery pipe;19- ammonia input pipes;20- compressed air input pipes;21- biologies Matter boiler smoke input pipe;22- mixes smoke-box.
Specific implementation mode
With reference to embodiment, further illustrate the present invention.
Referring to Fig. 1 it is found that the present invention a kind of biomass flue gas dust-removal and desulfurizing denitrating system, by bag filter 1, activity Charcoal denitrification apparatus and desulfurizer 8 form;1 air inlet of bag filter passes through mixed smoke-box 22 and biomass boiler flue gas input pipe 21 connections, the gas outlet that flue gas after desulfurization feeds back pipe 5 are connected to mixed smoke-box 22;Dedusting is equipped in the air-purifying chamber 4 of bag filter 1 Cloth bag 3,4 top of air-purifying chamber are equipped with gas outlet, and 4 bottom end of air-purifying chamber is equipped with ash bucket 2;The gas outlet of air-purifying chamber 4, ammonia input pipe 19 divide It is not connected to the air inlet of mixer 14 by delivery pipe, the gas outlet of mixer 14 passes through delivery pipe and activated carbon denitrification apparatus Air inlet connection, the gas outlet of activated carbon denitrification apparatus is connected to smoke stack emission pipe 6, the air inlet of activated carbon denitrification apparatus and Flue gas regenerates delivery pipe 18 and is connected to, and the gas outlet of activated carbon denitrification apparatus is connected to the air inlet of desulfurizer 8, desulfurizer 8 Gas outlet and flue gas after desulfurization feed back pipe 5 and be connected to.
Biomass boiler original flue gas is mixed by the flue gas after feeding back the desulfurization of the conveying of pipe 5 with flue gas after desulfurization first, is made Dust in flue gas is modified, while flue gas moisture content significantly declines, and is conducive to remove, and mixed flue gas passes through cloth bag Deduster 1, bag filter 1 use offline van-type pulse dust collector, flue gas to enter bag filter 1 by raising middle flask, filter wind Speed control is in 0.8m/s, by the filtration of dust-removal cloth-bag 3, can remove major part exhaust gas dust, and clean flue gas is from net Gas chamber 4 is collected into subordinate's purification system, and ashes point is collected by ash bucket 2 and regular outer row.
Top in air-purifying chamber 4 is equipped with voltage stabilizing gas bag 15, and compressed air input pipe 20 passes through voltage stabilizing gas bag 15 and dust removing cloth Bag 3 is connected to.
It works after a period of time, impulse soot blowing is carried out to dust-removal cloth-bag 3 using compressed air input pipe 20, with 4 voltage stabilizings Gas bag 15 carries out voltage stabilizing, and the ash that dust-removal cloth-bag 3 is assembled is blown off into ash bucket 2, realizes entire dust subtractive process.
Activated carbon denitrification apparatus is equipped with the activated charcoal unit 12 that can work independently connected side by side, each activated charcoal unit 12 Unit process case before and after have separate valve control activated charcoal unit 12 work.
Above-mentioned setting is, it can be achieved that any one activated charcoal unit 12 works online, or is stopped offline, convenient for according to cigarette The actual conditions of gas carry out cooperating.
Setting multilayer active carbon filler 11 in activated charcoal unit 12.
In each activated charcoal unit 12,8 active carbon filler 11 of multilayer is set by processing capacity, activated carbon is to SO2Have extremely strong Suction-operated, can be to low concentration SO in flue gas2It is adsorbed, reaches very low discharge standard, while activated carbon can be made For catalyst, the NH in flue gas is utilized3NO in flue gas is restored.Its temperature is just in activated carbon catalysis reduction denitration Optimal reaction temperature section, desulfurization and denitration efficiency are higher.Desulfurization and the dust removal process of flue gas may be implemented.
Flow straightening grid 13 is arranged in front end in the unit process case of each activated charcoal unit 12.
Flow straightening grid 13 is arranged in front end in unit process case, and flue gas is carried out rectification, stablizes flue gas flow field, overall activity Squarely or original shape reactor, vertical or horizontal installation is arranged in charcoal unit 12.
The unit process case of activated charcoal unit 12 is front and back to be arranged temperature and pressure sensor.
By the way that temperature and pressure sensor is arranged, it is monitored convenient for the parameter to gas.
It is connected to flue gas regeneration delivery pipe 18 before the unit process case of activated charcoal unit 12.
Since activated carbon is to SO2There is Preferential adsorption effect, so excessive absorption SO2Activated carbon catalysis reduction can be caused de- Nitre efficiency declines, and therefore, after a period of time, needs to carry out flue gas regeneration one by one to activated carbon case, flue gas regeneration uses 350 DEG C of cigarettes 6 activated charcoal unit 12 of gas pair regenerates, the SO adsorbed in activated carbon2It can be parsed, SO in the flue gas after parsing2Content can 30 times of enrichment or more, concentration is up to 6000mg/Nm3More than, parsing exhaust gas volumn is small, therefore only needs the desulfurizing tower of very little can be real Existing flue gas desulfurization course, the desulfuration efficiency of flue gas desulfurization course do not require too high yet, can effectively reduce Ca/S ratios in this way, reduce de- Sulphur system building and operating cost.
Active layer 10, spraying layer 9 are equipped in desulfurizer 8, active layer 10 is set to 9 top of spraying layer, active layer 10, spray Mist layer 9 is connected to technique water inlet pipe 16, liquid caustic soda input pipe 17 respectively.
Lye (urea, milk of lime, sodium carbonate) is sprayed into desulfurizing tower, it, will be alkaline by layer 9 of spraying in desulfurizing tower Solution carries out injection and carries out Dry FGD;The active layer 10 of upper layer setting, active layer 10 are activated using process water, into One step reduces reaction temperature, promotes desulfuration efficiency.After regenerated flue gas is by purification, SO2Concentration can be reduced to 200~400mg/Nm3 Left and right, identical as the original smoke density of biomass boiler, regenerated flue gas is incorporated to purification system front end later, and dust pelletizing system can be improved Efficiency can also improve the flue-gas temperature into bag filter 1, flue gas is made to reveal simultaneously as regenerated flue gas temperature is higher More than point temperature, reduce the failures such as 1 cloth bag knot ash of bag filter.
The air inlet of desulfurizer 8 is connected to by inlet cooling device 7 with the gas outlet of activated carbon denitrification apparatus.
The sweetening process of regenerated flue gas, using semi-dry process flue gas desulphurization process, some processes water is sprayed into because temperature is higher Desulfurizing tower carries out flue gas cooling and activation in advance, to improve treatment effect.
The present embodiment, flue gas ash removal, desulphurization and denitration process are all completed after stove, and the influence to boiler is effectively reduced, Simultaneously because SO2It is enriched with, desulphurization system cost substantially reduces, and exhaust gas dust property is improved, and dust pelletizing system is made Valence can also reduce.Activated carbon catalysis reduction principle is utilized in denitrating system, and no coupling product generates, and the escaping of ammonia is low, activated carbon itself No consumption, therefore operating cost is relatively low, and denitrating flue gas is more efficient, can reach the requirement of minimum discharge standard.
The foregoing is merely preferably feasible embodiments of the invention, not thereby limit to the interest field of the present invention, It is all to change with equivalent structure made by description of the invention and accompanying drawing content, it is both contained within the interest field of the present invention.

Claims (9)

1. a kind of biomass flue gas dust-removal and desulfurizing denitrating system, including bag filter, activated carbon denitrification apparatus and desulfurizer, It is characterized in that:The bag filter air inlet is connected to by mixed smoke-box with biomass boiler flue gas input pipe, after desulfurization The gas outlet that flue gas feeds back pipe is connected to mixed smoke-box;It is equipped with dust-removal cloth-bag in the air-purifying chamber of bag filter, is set at the top of air-purifying chamber There are gas outlet, air-purifying chamber bottom end to be equipped with ash bucket;The gas outlet of air-purifying chamber, ammonia input pipe respectively by delivery pipe and mixer into Gas port is connected to, and the gas outlet of mixer is connected to by delivery pipe with the air inlet of activated carbon denitrification apparatus, activated carbon denitrification apparatus Gas outlet be connected to smoke stack emission pipe, the air inlet of activated carbon denitrification apparatus and flue gas regeneration delivery pipe be connected tos, and activated carbon takes off The gas outlet of nitre device is connected to the air inlet of desulfurizer, and gas outlet and the flue gas after desulfurization of desulfurizer feed back pipe and be connected to.
2. biomass flue gas dust-removal and desulfurizing denitrating system according to claim 1, it is characterised in that:In the air-purifying chamber Top be equipped with voltage stabilizing gas bag, compressed air input pipe is connected to by voltage stabilizing gas bag with dust-removal cloth-bag.
3. biomass flue gas dust-removal and desulfurizing denitrating system according to claim 1, it is characterised in that:The activated carbon is de- Nitre device is equipped with the activated charcoal unit that can work independently connected side by side, has before and after the unit process case of each activated charcoal unit Separate valve controls the work of activated charcoal unit.
4. biomass flue gas dust-removal and desulfurizing denitrating system according to claim 3, it is characterised in that:The activated carbon list Multilayer active carbon filler is set in first.
5. biomass flue gas dust-removal and desulfurizing denitrating system according to claim 3, it is characterised in that:Each activity Flow straightening grid is arranged in front end in the unit process case of charcoal unit.
6. biomass flue gas dust-removal and desulfurizing denitrating system according to claim 3, it is characterised in that:The activated carbon list The unit process case of member is front and back to be arranged temperature and pressure sensor.
7. biomass flue gas dust-removal and desulfurizing denitrating system according to claim 3, it is characterised in that:The activated carbon list It is connected to flue gas regeneration delivery pipe before the unit process case of member.
8. wanting the biomass flue gas dust-removal and desulfurizing denitrating system described in 1 according to right, it is characterised in that:In the desulfurizer Equipped with active layer, spraying layer, active layer be set to spraying layer above, active layer, spraying layer respectively with technique water inlet pipe, liquid caustic soda Input pipe is connected to.
9. biomass flue gas dust-removal and desulfurizing denitrating system according to claim 1, it is characterised in that:The desulfurizer Air inlet be connected to the gas outlet of activated carbon denitrification apparatus by inlet cooling device.
CN201810614850.9A 2018-06-14 2018-06-14 A kind of biomass flue gas dust-removal and desulfurizing denitrating system Pending CN108499344A (en)

Priority Applications (1)

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CN110115924A (en) * 2019-05-27 2019-08-13 凤阳海泰科能源环境管理服务有限公司 A kind of garbage power plant smoke depth depickling takes off white system and method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110115924A (en) * 2019-05-27 2019-08-13 凤阳海泰科能源环境管理服务有限公司 A kind of garbage power plant smoke depth depickling takes off white system and method

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