CN205199271U - Middle -size and small -size coal fired boiler flue gas dedusting and desulfurizing denitration is treatment equipment in coordination - Google Patents

Middle -size and small -size coal fired boiler flue gas dedusting and desulfurizing denitration is treatment equipment in coordination Download PDF

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Publication number
CN205199271U
CN205199271U CN201521032654.9U CN201521032654U CN205199271U CN 205199271 U CN205199271 U CN 205199271U CN 201521032654 U CN201521032654 U CN 201521032654U CN 205199271 U CN205199271 U CN 205199271U
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reaction room
denitration
flue gas
flue
equipment
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高尔豪
刘世铮
朱俊杰
马晓辉
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Tiancheng Environment Protection Technology Co Ltd Zhonggang Group
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Tiancheng Environment Protection Technology Co Ltd Zhonggang Group
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    • 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
    • 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 utility model relates to a middle -size and small -size coal fired boiler flue gas dedusting and desulfurizing denitration is treatment equipment in coordination. Set up the sack cleaner at coal fired boiler 1 heating flue gas end, connect flue gas desulfurization reaction room 7, flue gas desulfurization reaction room 7 through draught fan 6 and connect denitration reaction room 8 through flue 12 behind the sack cleaner, chimney 14 is connected to the exhanst gas outlet of denitration reaction room 8, be equipped with active carbon fixed bed 9 in flue gas desulfurization reaction room 7, denitration reaction room 8. This equipment operation is stable, efficient, can adapt to the coal quality fluctuates, but active carbon regeneration, working costs are low, nos secondary pollution etc. Are the techniques that the many pollutants of middle -size and small -size coal fired boiler flue gas that are fit for the china's national situation reduced discharging improvement in coordination, wherein the dust clearance reaches more than 99 percent, and desulfurization efficiency can reach more than 80 percent, and denitration efficiency can reach 60 percent~80 percent, the content of sulfur dioxide, nitrogen oxide, particulate matter, heavy metal can reach the emission standard of " boiler atmospheric pollutants emission standard " (GB13217 -2014) in the flue gas of processing back.

Description

Middle and small burn coal boiler flue-gas dust-removing and desulfurization denitration govern coordinately equipment
Technical field
The utility model belongs to the govern coordinately emission-reduction technology of the heavy metals such as middle and small burn coal boiler discharge sulfur dioxide in flue gas, nitrogen oxide, particle and mercury, particularly a kind of middle and small burn coal boiler flue-gas dust-removing and desulfurization denitration govern coordinately equipment.
Background technology
In May, 2014, country promulgated " emission standard of air pollutants for boilers " (GB13217-2014) of third time revision, and this standard has carried out more strict regulations to discharge of major pollutant in boiler smoke.Within being defined within a definite time, using coal-burning boiler SO 2, NO x, particle emission limit be reduced to 400mg/m respectively 3, 400mg/m 3, 80mg/m 3below; New construction of coal-fired boiler SO 2, NO x, particle emission limit be reduced to 300mg/m respectively 3, 300mg/m 3, 50mg/m 3below; Some priority control areas coal-burning boiler SO 2, NO x, particle emission limit require even to be respectively reduced to 200mg/m 3, 200mg/m 3, 30mg/m 3below, and the discharge standard of mercury and mercuric compounds is limited to 0.05mg/m 3below.
What current application was more is stone desulphurization water dust scrubber or single active carbon desulfurization device.Stone desulphurization water dust scrubber water consumption is large, and almost can not remove NO x, the waste water of generation is also difficult to process.Single active carbon desulfurization device, denitration efficiency is low, and efficiency of dust collection is also lower, and dust easily causes activated carbon capillary blocking to cause desulfuration efficiency to reduce.These technology paths are all difficult to the discharge standard meeting increasingly stringent.
In addition, miniature boiler flue gas managing technique is selected also in line with economy and otherness, will to indiscriminately imitate the purification treatment technology technique of large-sized boiler flue gas, such as wet method limestone-based process, SCR technique etc., and for middle and small burn coal boiler factory, investment operating cost is too high.Select suitable medium small boiler flue gases purification, seek best improvement route.
Following technology and patent is mainly contained at present in middle and small burn coal boiler smoke gas treatment technical field:
1, patent publication No. is " a kind of flue-gas dust-removing and desulfurization system for middle and small burn coal boiler " of CN102847400A.This technology before this flue gas was entered cyclone dust collectors and venturi wet scrubber carries out dedusting, then carries out wet magnesium oxide desulphurization, is furnished with water circulation system simultaneously, to reach the object of coordinated desulfurization dedusting.But nitrogen oxide can not meet discharge standard.In addition, fire coal boiler fume SO 2fluctuation of concentration is large, and magnesium sulphur is than needing continuous adjustment to ensure desulfuration efficiency.Moreover, in the place that some magnesium ore deposits are rare, uneconomical with wet magnesium oxide desulphurization.And for middle and small burn coal boiler factory, slurries system turn improves investment and operating cost.
2, patent publication No. is " the wet method formula flue gas desulfurization and denitrification demercuration integration granite duster " of CN104436971A.This technology is by coal-fired flue-gas dedusting in a wet process, carries out desulfurization by sprinkling alkali lye and lime slurry simultaneously, sprays ammoniacal liquor and carries out denitration, pass into calcium bromide water quality and carry out demercuration, optimize device structure simultaneously, complete dust-removal and desulfurizing denitrification integral.But this technology water consumption is large, selects the large kind of chemical reagent amount of purifying smoke many, causes operation expense higher.Meanwhile, under normal temperature state, the denitration efficiency directly spraying ammoniacal liquor is not high, does not reach discharge standard.The process a great problem especially of waste liquid.
3, patent publication No. is a kind of " activated coke desulfurization denitrating system technique and the method " of CN102430318A.This technology carries out the desulphurization denitration removal of mercury of flue gas with the charcoal absorption reactor of cross-flow moving bed formula, has carried out the regeneration of active carbon with desorption and regeneration device simultaneously.But this technology does not carry out the efficient removal of dust, flue gas is when entering active carbon adsorber, and higher dust content easily causes the blocking of active carbon, thus the efficiency of desulphurization denitration is greatly reduced, and also reduces the utilization ratio of active carbon.In addition, the SO be not removed 2can generate ammonium sulfate with ammoniacal liquor, axial project organization easily blocks blanking channel, adds the maintenance difficulties of system.
Summary of the invention
The purpose of this utility model is that in the govern coordinately emission-reduction technology for existing middle and small burn coal boiler discharge sulfur dioxide in flue gas, nitrogen oxide, particle and heavy metal, smoke components and temperature fluctuation cause greatly improvement difficulty, the problems such as process are difficult to the waste water that wet method is administered, a kind of middle and small burn coal boiler flue-gas dust-removing and desulfurization denitration govern coordinately equipment is provided, to meet the environmental protection standard of increasingly stringent, reduce one-time investment, operating cost simultaneously, improve governance efficiency.
Technical solution of the present utility model is: middle and small burn coal boiler flue-gas dust-removing and desulfurization denitration govern coordinately equipment, at coal-burning boiler heating flue gas end, sack cleaner is set, after sack cleaner, connect desulphurization reaction room by air-introduced machine, desulphurization reaction room connects denitration reaction room by flue; Described desulphurization reaction room, denitration reaction indoor are provided with activated carbon and fixed bed.
Further, be provided with filter chamber in the import department of described sack cleaner, flow apron and buffer channel are set in filter chamber; After filter chamber, arrange filter bag, above filter bag, arrange air-purifying chamber, the outlet of air-purifying chamber is connected with air-introduced machine; Ash bucket is provided with in the bottom of sack cleaner.
Further, device for discharging is set in the bottom of described desulphurization reaction room, denitration reaction room.
Further, active carbon storage tank is set on the top of described desulphurization reaction room, denitration reaction room.
Further, described flue is connected with ammonia feedway.
Further, described activated carbon and fixed bed is porous plate or cellular structure, and active carbon can with granular active carbon or burgy.
Further, the exhanst gas outlet of described denitration reaction room connects chimney.
Adopt the multi-pollutant govern coordinately technique such as middle and small burn coal boiler exhaust gas dust, sulfur dioxide, nitrogen oxide, heavy metal of utility model equipment, comprise the steps:
(1) flue gas of coal-burning boiler discharge, first enters sack cleaner and carries out flue gas ash removal; Flue gas, through filter chamber, by arranging flow apron and buffer channel, making air-flow evenly carry to filter bag, avoiding dust-contained airflow to affect its service life to directly washing away of filter bag, and when it also avoid air intake, ash bucket is interior simultaneously forms eddy current and produces airborne dust; Fall into the dust of ash bucket, carry out regular ash discharge disposal.
(2) flue gas after dedusting is discharged through air-purifying chamber, and the activated carbon and fixed bed then entering desulphurization reaction room carries out sulfur dioxide, nitrogen oxide, the removing of heavy metal; .When the dust staying filter bag outer surface reaches finite concentration, carry out deashing in pulse jet mode.
(3) flue gas enters into desulphurization reaction room, containing SO through air-introduced machine 2flue gas through activated carbon and fixed bed, SO 2by active carbon physical absorption, and the chemisorption under having steam and oxygen to there is situation, realize SO 2remove.
(4) in desulphurization reaction room, denitration reaction room connects the porch of flue, ammonia feedway ceaselessly supplies ammonia, make ammonia and nitrogen oxide abundant premix in flue, thus the two fully can react in denitration reaction room, under the catalytic action of active carbon, reaction generates N 2and H 2o.
(5) flue gas is purified through activated carbon and fixed bed, adsorb saturated active carbon by device for discharging outward transport regeneration, simultaneously, be placed in the active carbon storage tank on top of desulphurization reaction room, denitration reaction room, ceaselessly to desulphurization reaction room, denitration reaction room supply fresh activity charcoal, maintain higher denitrification efficiency.
(6) flue gas is while activated carbon and fixed bed desulphurization denitration, and the heavy metal in flue gas also by adsorbing and removing, thus reaches the object of multi-pollutant govern coordinately.
(7) through the flue gas of purification, enter chimney and enter air.
First described step (1) coal-fired flue-gas carries out flue gas ash removal through sack cleaner, to avoid because dust contained flue gas excessive concentration causes the activated carbon capillary in desulfurization and denitrification reaction room to block, reduces adsorption cleaning efficiency.
The porch that described step (4) connects flue at desulphurization and denitration reative cell passes into denitrification reducing agent, makes it to carry out premix with flue gas, improves NO in denitration reaction room xremoval efficiency; Denitrfying agent can adopt ammonia, urea, hydro carbons etc.
The desulfurization of described step (5) is different with the saturated speed degree of the active carbon in denitration reaction room, thus the discharge rate of the feed of fresh activity charcoal and saturated activity charcoal is also different; Can abandon after the discharging of saturated activity charcoal, transport outward regeneration, in-place regeneration etc.
The beneficial effects of the utility model are: carrying out flue gas ash removal by arranging sack cleaner at coal heating flue gas end, entering activated carbon and fixed bed afterwards, carrying out flue gas desulfurization and denitrification and removal heavy metal; This stable equipment operation, efficiency is high, can adapt to ature of coal fluctuation; Active carbon reproducible utilization, operating cost are low, non-secondary pollution etc., are that the middle and small burn coal boiler flue gas multiple pollutant of applicable China's national situation works in coordination with the technology reducing discharging and administer; Wherein dust clearance reaches more than 99%, and desulfuration efficiency can reach more than 80%, and denitration efficiency can reach 60% ~ 80%; .After process, the content of sulfur dioxide in flue gas, nitrogen oxide, particle, heavy metal can reach the discharge standard of " emission standard of air pollutants for boilers " (GB13217-2014).
Accompanying drawing explanation
Fig. 1 is middle and small burn coal boiler flue-gas dust-removing and desulfurization denitration govern coordinately equipment structure chart.
In figure: 1. coal-burning boiler; 2. filter chamber; 3. filter bag; 4. ash bucket; 5. air-purifying chamber; 6. air-introduced machine; 7. desulphurization reaction room; 8. denitration reaction room; 9. activated carbon and fixed bed; 10. active carbon storage tank; 11. ammonia feedwaies; 12. flues; 13. devices for discharging; 14. chimneys.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is described further.
Middle and small burn coal boiler flue-gas dust-removing and desulfurization denitration govern coordinately equipment, at the coal-burning boiler 1 flue gas end that heats, sack cleaner is set, after sack cleaner, connect desulphurization reaction room 7 by air-introduced machine 6, desulphurization reaction room 7 connects denitration reaction room 8 by flue 12; The exhanst gas outlet of denitration reaction room 8 connects chimney 14.
Activated carbon and fixed bed 9 is provided with in described desulphurization reaction room 7, denitration reaction room 8; Described activated carbon and fixed bed 9 is porous plate or cellular structure, and active carbon can with granular active carbon or burgy.
Be provided with filter chamber 2 in the import department of sack cleaner, flow apron and buffer channel are set in filter chamber 2; Arrange filter bag 3 below in filter chamber 2, above filter bag, arrange air-purifying chamber 5, the outlet of air-purifying chamber 5 is connected with air-introduced machine 6; Ash bucket 4 is provided with in the bottom of sack cleaner.
In desulphurization reaction room 7, the bottom of denitration reaction room 8 arranges device for discharging 13; In desulphurization reaction room 7, the top of denitration reaction room 8 arranges active carbon storage tank 10; Flue 12 is connected with ammonia feedway 11.
The flue gas of being discharged by middle and small burn coal boiler 1, enters sack cleaner and carries out flue gas ash removal; First by filter chamber 2, simultaneously by arranging flow apron and buffer channel, make air-flow evenly conveying and distribution in filter bag 3, avoid dust-contained airflow to affect its service life to directly washing away of filter bag, when it also avoid air intake, ash bucket 4 is interior simultaneously forms eddy current and produces airborne dust; Fall into the dust in ash bucket 4, carry out regular ash discharge disposal.
Flue gas after dedusting is discharged through air-purifying chamber 5, when the dust staying filter bag outer surface reaches finite concentration, carries out deashing with pulse spraying equipment; Efficiency of dust collection can reach more than 99%.
Flue gas enters into desulphurization reaction room 7, containing SO through air-introduced machine 6 2flue gas when activated carbon and fixed bed 9, SO 2by active carbon physical absorption, and the chemisorption under having steam and oxygen to there is situation, SO 2removal efficiency can reach more than 80%; .The active carbon bed of desulphurization reaction room 7 is to the NO in flue gas simultaneously xhave certain effect, but removal efficiency is lower.
Flue gas after dust-removal and desulfurizing, denitration reaction room 8 is entered by flue 12, in flue 12, ammonia feedway 11 is had ceaselessly to supply ammonia, ammonia and amino-oxide are fully mixed in advance in flue 12, improve in denitration reaction room 8, the two reaction efficiency under the catalytic action of active carbon, generates nontoxic N after ammonia and reaction of nitrogen oxides 2and H 2o, in denitration reaction room 8, denitration efficiency can reach 60% ~ 80%.
While desulphurization denitration, active carbon can produce loss, makes purification efficiency step-down, can produce the situation of discharge beyond standards; In desulphurization reaction room 7, the top of denitration reaction room 8 arranges active carbon storage tank 10, adsorb saturated active carbon by while transporting outward regeneration after device for discharging 13 discharging, active carbon storage tank 10 ceaselessly to reactor supply fresh activity charcoal, maintains high efficiency desulphurization denitration.
Activated carbon and fixed bed 9, while desulphurization denitration, also can have certain removal efficiency to the heavy metal in flue gas, thus reach the object of multi-pollutant govern coordinately.
Through the flue gas of purification, finally enter chimney 14 and enter air; Flue gas after purification meets discharge standard.

Claims (7)

1. middle and small burn coal boiler flue-gas dust-removing and desulfurization denitration govern coordinately equipment, at coal-burning boiler (1) heating flue gas end, sack cleaner is set, it is characterized in that connecting desulphurization reaction room (7) by air-introduced machine (6) after sack cleaner, desulphurization reaction room (7) connect denitration reaction room (8) by flue (12); Activated carbon and fixed bed (9) is provided with in described desulphurization reaction room (7), denitration reaction room (8).
2. middle and small burn coal boiler flue-gas dust-removing and desulfurization denitration govern coordinately equipment according to claim 1, it is characterized in that being provided with filter chamber (2) in the import department of sack cleaner, filter chamber arranges flow apron and buffer channel in (2); Arrange filter bag (3) below in filter chamber (2), above filter bag, arrange air-purifying chamber (5), the outlet of air-purifying chamber (5) is connected with air-introduced machine (6); Ash bucket (4) is provided with in the bottom of sack cleaner.
3. middle and small burn coal boiler flue-gas dust-removing and desulfurization denitration govern coordinately equipment according to claim 1, is characterized in that arranging device for discharging (13) in the bottom of desulphurization reaction room (7), denitration reaction room (8).
4. middle and small burn coal boiler flue-gas dust-removing and desulfurization denitration govern coordinately equipment according to claim 1, is characterized in that arranging active carbon storage tank (10) on the top of desulphurization reaction room (7), denitration reaction room (8).
5. middle and small burn coal boiler flue-gas dust-removing and desulfurization denitration govern coordinately equipment according to claim 1, is characterized in that being connected with ammonia feedway (11) on flue (12).
6. middle and small burn coal boiler flue-gas dust-removing and desulfurization denitration govern coordinately equipment according to claim 1, is characterized in that described activated carbon and fixed bed (9) is porous plate or cellular structure, and active carbon can with granular active carbon or burgy.
7. middle and small burn coal boiler flue-gas dust-removing and desulfurization denitration govern coordinately equipment according to claim 1, is characterized in that the exhanst gas outlet of denitration reaction room (8) connects chimney (14).
CN201521032654.9U 2015-12-14 2015-12-14 Middle -size and small -size coal fired boiler flue gas dedusting and desulfurizing denitration is treatment equipment in coordination Active CN205199271U (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106016313A (en) * 2016-05-10 2016-10-12 海宁马桥大都市热电有限公司 Low-emission environment-friendly boiler
CN107941046A (en) * 2017-11-16 2018-04-20 南宁众创空间科技有限公司 A kind of environment-friendly type based on recycling residual heat is given up cigarette filtration apparatus
CN109833682A (en) * 2019-04-19 2019-06-04 汤辉 A kind of desulfurization denitration integrative smoke purifying device and its application method
CN111006203A (en) * 2019-11-28 2020-04-14 徐州市元亨新能源开发有限公司 Environment-friendly combustion boiler
CN111646252A (en) * 2020-07-15 2020-09-11 北京中电国核节能环保科技股份有限公司 High-efficiency energy-saving dust removing equipment for belt conveyor

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106016313A (en) * 2016-05-10 2016-10-12 海宁马桥大都市热电有限公司 Low-emission environment-friendly boiler
CN106016313B (en) * 2016-05-10 2018-01-30 海宁马桥大都市热电有限公司 Low emission environment-protection boiler
CN107941046A (en) * 2017-11-16 2018-04-20 南宁众创空间科技有限公司 A kind of environment-friendly type based on recycling residual heat is given up cigarette filtration apparatus
CN109833682A (en) * 2019-04-19 2019-06-04 汤辉 A kind of desulfurization denitration integrative smoke purifying device and its application method
CN111006203A (en) * 2019-11-28 2020-04-14 徐州市元亨新能源开发有限公司 Environment-friendly combustion boiler
CN111646252A (en) * 2020-07-15 2020-09-11 北京中电国核节能环保科技股份有限公司 High-efficiency energy-saving dust removing equipment for belt conveyor

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