CN1137759C - Comprehensive garbage incinerating tail gas purifying method and equipment - Google Patents
Comprehensive garbage incinerating tail gas purifying method and equipment Download PDFInfo
- Publication number
- CN1137759C CN1137759C CNB001098748A CN00109874A CN1137759C CN 1137759 C CN1137759 C CN 1137759C CN B001098748 A CNB001098748 A CN B001098748A CN 00109874 A CN00109874 A CN 00109874A CN 1137759 C CN1137759 C CN 1137759C
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- Prior art keywords
- tail gas
- gas
- bed
- garbage incinerating
- solid
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- Expired - Lifetime
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- 238000000034 method Methods 0.000 title claims abstract description 26
- 239000000463 material Substances 0.000 claims abstract description 29
- 239000007787 solid Substances 0.000 claims abstract description 28
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 15
- 239000012530 fluid Substances 0.000 claims abstract description 14
- HGUFODBRKLSHSI-UHFFFAOYSA-N 2,3,7,8-tetrachloro-dibenzo-p-dioxin Chemical compound O1C2=CC(Cl)=C(Cl)C=C2OC2=C1C=C(Cl)C(Cl)=C2 HGUFODBRKLSHSI-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910001385 heavy metal Inorganic materials 0.000 claims abstract description 11
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000011575 calcium Substances 0.000 claims abstract description 10
- 229910052791 calcium Inorganic materials 0.000 claims abstract description 10
- 238000005243 fluidization Methods 0.000 claims abstract description 6
- 239000007789 gas Substances 0.000 claims description 50
- 230000003179 granulation Effects 0.000 claims description 24
- 238000005469 granulation Methods 0.000 claims description 24
- 239000002245 particle Substances 0.000 claims description 13
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 claims description 12
- 239000000428 dust Substances 0.000 claims description 10
- 239000003546 flue gas Substances 0.000 claims description 10
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 9
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 claims description 8
- 239000003463 adsorbent Substances 0.000 claims description 8
- 238000000746 purification Methods 0.000 claims description 8
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 claims description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- 235000019738 Limestone Nutrition 0.000 claims description 6
- 229910052799 carbon Inorganic materials 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 239000006028 limestone Substances 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 6
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 5
- 239000000460 chlorine Substances 0.000 claims description 5
- 238000002485 combustion reaction Methods 0.000 claims description 5
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 claims description 5
- 229910000041 hydrogen chloride Inorganic materials 0.000 claims description 5
- 238000010521 absorption reaction Methods 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 239000003575 carbonaceous material Substances 0.000 claims description 3
- 229910001902 chlorine oxide Inorganic materials 0.000 claims description 3
- 239000012717 electrostatic precipitator Substances 0.000 claims description 3
- 238000006386 neutralization reaction Methods 0.000 claims description 3
- 239000007921 spray Substances 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims 1
- 239000005864 Sulphur Substances 0.000 claims 1
- 238000005660 chlorination reaction Methods 0.000 claims 1
- 239000000571 coke Substances 0.000 claims 1
- -1 sulfur dioxide Chemical compound 0.000 claims 1
- 238000005987 sulfurization reaction Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 4
- 239000006096 absorbing agent Substances 0.000 abstract 1
- 239000002253 acid Substances 0.000 abstract 1
- 239000011882 ultra-fine particle Substances 0.000 abstract 1
- 239000002585 base Substances 0.000 description 6
- 238000006477 desulfuration reaction Methods 0.000 description 4
- 239000003344 environmental pollutant Substances 0.000 description 4
- 231100000719 pollutant Toxicity 0.000 description 4
- AKEJUJNQAAGONA-UHFFFAOYSA-N sulfur trioxide Chemical compound O=S(=O)=O AKEJUJNQAAGONA-UHFFFAOYSA-N 0.000 description 4
- 230000023556 desulfurization Effects 0.000 description 3
- 230000003134 recirculating effect Effects 0.000 description 3
- 238000004056 waste incineration Methods 0.000 description 3
- 229910052801 chlorine Inorganic materials 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000006298 dechlorination reaction Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 159000000007 calcium salts Chemical class 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical compound S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
Images
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Abstract
The present invention discloses a method and a device for comprehensively purifying tail gas produced in refuse incineration. After accelerated by an expansion jet-pipe, tail gas produced in refuse incineration is sprayed into a circulating fluid bed purifier taking calcium-based eliminating agents and adsorbing agents as the bed material, and the bed material is driven together for fluidization; gas, solution and solid are intensively mixed, and both heat transfer and mass transfer are sufficiently carried out, so that acid gas and ultra-fine particles, such as heavy metal, dioxin, etc., in the tail gas are neutrally reacted in the process of mass transfer and absorbed by the absorbing agents. As compared with the prior art, the present invention has the advantages of simple processing steps, easy realization, obvious purifying effect, compact device structure, small occupation area, and low investment and running cost.
Description
The present invention relates to combustion furnace tail gas clean-up and dedusting technology field, relate in particular to the adsorbing and removing method and the device thereof of dry desulfurization, dechlorination and fine grained, heavy metal, the dioxin etc. of garbage incinerating tail gas.
Atmosphere pollution is the focus of world many countries environmental protection always, and the flue gas desulfurization technique that various countries successively develop has reached kind more than 200.But, can commercial Application have only kind more than ten.Tail gas for the waste incineration generation, except that containing conventional coal-fired flue-gas pollutant such as nitrogen oxide, oxysulfide, fine grained and heavy metal, also contain harmful substances such as more substantial simple substance chlorine, hydrogen chloride, dioxin, conventional desulfurization and dedusting technology can not satisfy the strict purification of garbage incinerating tail gas requirement.Existing external garbage incinerating tail gas purification techniques mostly adopts wet method, as U.S. Pat 4789532 are the sour gas that adopt in the conventional spray lime slurry absorption tail gas, as sulfur dioxide, hydrogen chloride, simple substance chlorine etc., behind reactor, connect the sack cleaner dedusting then.Though said method can be removed sour gas and flying dust in the tail gas, exist equipment investment and operating cost height, floor space big, can not effectively remove heavy metal and the fine grain problem of dioxin that waste incineration produces.
At above-mentioned problems of the prior art, the purpose of this invention is to provide a kind of method and device thereof of comprehensive garbage incinerating tail gas purifying.Use this method, can make processing step simply, not only the effect of sour gas and flying dust is remarkable in the cleaning of off-gas, more outstanding is effectively to remove heavy metal and the dioxin fine grained that waste incineration produces.For implementing the device of this method, its compact conformation, floor space is little, the investment operating cost is low.
In order to reach above-mentioned goal of the invention, technical scheme of the present invention realizes as follows: 1. a kind of method of comprehensive garbage incinerating tail gas purifying the steps include: to spray into after the flue gas that combustion apparatus is discharged quickens through de Laval noz(zle) to remove in the fluid bed clarifier that agent and adsorbent are the bed material and drive bed with the calcium base and expects fluidisation together; 2. at tail gas and bed material gas, liquid, solid taking place altogether in the process of fluidisation mixes and heat transfer and mass transfer fully strongly, make sour gas such as sulfur dioxide, sulfur trioxide, hydrogen chloride, simple substance chlorine and nitrogen oxide etc. in the tail gas remove agent bed material generation neutralization reaction with the calcium base, and make in the tail gas ultra-fine grain such as heavy metal and dioxin in mass transport process by adsorbents adsorb in the bed material; 3. react the material that forms with absorption back stay remove in the agent with solid form and not the bed of complete reaction expect to enter gas-solid separator with flue gas; 4. behind gas-solid separator, solid particle enters in the surge bunker, make solid particle more than 90% enter the mixing granulation device and with fresh pulverized limestone, active carbon and mixes with small amount of water granulation, material unnecessary in the surge bunker is discharged.Clean flue gas after the purification by air-introduced machine by the chimney qualified discharge; 5. the particle behind the mixing granulation enters in the fluid bed clarifier again and recycles.
Realize the device of foregoing invention purpose comprehensive garbage incinerating tail gas purifying method, it comprises with the calcium base and removes the fluid bed clarifier that agent and adsorbent are the bed material, with the gas-solid separator that high efficiency cyclonic dust collector, electrostatic precipitator, sack cleaner or their combinations are formed, have the surge bunker and the mixing granulation device of feed and discharge device.Its design feature is: the arrival end of described fluid bed clarifier is provided with de Laval noz(zle) and the bed material inlet that tail gas is quickened.The de Laval noz(zle) other end and garbage incinerating tail gas inlet join.Bed material inlet joins with the outlet of mixing granulation device.The mixing granulation device is equipped with a plurality of batching inlets and joins with batcher.The batcher other end and surge bunker join.Surge bunker top and side top are equipped with gas-solid separator and discharge machine.Gas-solid separator top and side top are equipped with clean gas outlet and horizontal connection tube.The port of export of the horizontal connection tube other end and fluid bed clarifier joins.
According to above-mentioned technical scheme, a plurality of batching inlets of described mixing granulation device are admission port, active carbon material inlet and pulverized limestone material inlet; Thin, the thick hyperbola pipe in two ends in the middle of the shape of described de Laval noz(zle) is.
The present invention compared with prior art has the following advantages and good effect:
(1) on conventional dry recirculating fluidized bed flue gases purification basis, characteristics and purification requirement according to the garbage incinerating tail gas pollutant, organically combine integrated by recirculating fluidized bed clarifier, gas-solid separator and mixing granulation device, utilize the calcium base to remove agent and react the sour gas of removing in the tail gas, add adsorbents such as flying dust and active carbon simultaneously and effectively remove heavy metal and dioxin.Not only technology is simple, and compact equipment is reduced investment outlay and floor space, and good tail gas purification effect, satisfies environmental requirement fully, realizes the garbage incinerating tail gas qualified discharge.
(2) use the mixing granulation device to carry out granulation, can be according to exhaust temperature, pollutant levels and air velocity, in time regulate the addition of fresh material, adding speed, parameters such as granulation size, formation has the particle that enriches activated adoption position and pore structure, helps the optimum state and the best purification efficient of assurance system operation, improve the utilization rate of additive simultaneously, reduce its operating cost.
(3) in removing the process of pollutant, the bed material keeps the relatively dry state, has effectively avoided corrosive pipeline and blockage problem in the wet cleaning system.
(4) owing to adopt dry-type circulating fluidized bed tail gas clean-up technology, the required moisture of system is few, and product is dry state, has reduced water consumption, has avoided the water pollution problems in the wet method, and has reduced the processing cost of product.
The present invention is described in further detail below in conjunction with accompanying drawing and concrete embodiment.
Accompanying drawing is the inventive method step and device catenation principle figure thereof.
Referring to the garbage incinerating tail gas that accompanying drawing comes out from combustion apparatus, by gas inlet 13,, two ends thick hyperbola pipe thin through the centre is after de Laval noz(zle) 1 quickens, to enter fluid bed clarifier 2.Tail gas drives in fluid bed clarifier 2 and removes the bed that agent and flying dust, acticarbon form by the calcium base and expect fluidisation together, and fluidizing velocity fully conducts heat and mass transfer simultaneously up to the 5-10 meter per second.In this process, sour gas such as sulfur dioxide, sulfur trioxide, hydrogen chloride, simple substance chlorine and nitrogen oxide etc. and calcium base alkali compounds generation neutralization reaction in the tail gas generate solid calcium salt.Simultaneously ultra-fine grains such as heavy metal in the tail gas and dioxin are in that to expect to be adsorbed in the abundant mixed process agent flying dust and active carbon adsorbed and remove with bed.Solid particle after reaction and the absorption enters gas-solid separator 4 with air-flow through horizontal transition pipe 3, in gas-solid separator 4, use deduster, this deduster can be that sack cleaner, cyclone dust collectors, electrostatic precipitator or their organic assembling body realize that gas and the efficient of solid particle separate, dust removal efficiency is up to 99.9%, go forward side by side one-step removal acidic gas in flue gas, dioxin and heavy metal.Desulfuration efficiency of the present invention can reach more than 95%, and dechlorination efficiency is greater than 97%, and heavy metal and dioxin removal efficiency are all greater than 90%.Purified gas is discharged into chimney by clean gas outlet 14 through air-introduced machine.Gas-solid separator 4 removes the solid particle that gets off, complete reaction removes the agent particle and also do not have the agent particle that removes of complete reaction to enter surge bunker 5.Solid material in the surge bunker 5 enters mixing granulation device 8 by batcher 7 more than 90%, and all the other materials that do not circulate are discharged grey storehouse by discharge machine 6 and further handled.Enter in the mixing granulation device 8 recycle stock with from the pulverized limestone of pulverized limestone material inlet 9, the active carbon of active carbon material inlet 10 and the abundant mixing granulation of water of admission port 11, particle size range is 200-300um, maximum is no more than 500um.Mixed material after the granulation is as the bed material of recirculating fluidized bed clarifier 2, and enters in the fluid bed clarifier 2 via bed material inlet 12 by mixing granulation device 8 and to recycle.
Claims (8)
1, a kind of method of comprehensive garbage incinerating tail gas purifying the steps include: 1) tail gas that combustion apparatus is discharged sprays into after quickening through de Laval noz(zle) to remove in the fluid bed clarifier that agent and adsorbent are the bed material and drive bed with the calcium base and expects fluidisation together; 2) in a tail gas and the process of material, take place to conduct heat and mass transfer strong mixing of gas, liquid, solid with sufficient in fluidisation, make sour gas such as sulfur dioxide, tri-chlorination sulphur, hydrogen chloride, simple substance chlorine and nitrogen oxide etc. in the tail gas remove agent bed material generation neutralization reaction with the calcium base, and make in the tail gas ultra-fine grain such as heavy metal and dioxin in mass transport process by adsorbents adsorb in the bed material; 3) material that forms with absorption back of reaction stay remove in the agent with solid form and not the bed of complete reaction expect to send into gas-solid separator with flue gas; 4) behind gas-solid separator, solid particle enters in the surge bunker, make solid particle more than 90% enter the mixing granulation device and with fresh pulverized limestone, active carbon and mixes with small amount of water granulation, object unnecessary in the surge bunker is discharged, the clean flue gas after the purification by air-introduced machine by the chimney qualified discharge; 5) particle behind the mixing granulation enters in the fluid bed clarifier again and recycles.
2, according to the method for the described comprehensive garbage incinerating tail gas purifying of claim 1, it is 5-10m/S with bed materials flow speed designs in the fluid bed clarifier that its feature is appointed in: the flue gas that described combustion apparatus is discharged.
3, according to the method for the described comprehensive garbage incinerating tail gas purifying of claim 2, it is characterized in that: described adsorbent is a porous mass, comprises flying dust, active carbon and coke.
4, according to the method for the described comprehensive garbage incinerating tail gas purifying of claim 3, it is characterized in that: described mixing granulation diameter range is 200um-500um.
5, a kind of device of realizing claim 1 or 4 described comprehensive garbage incinerating tail gas purifyings, it comprises with the calcium base and removes the sulfuration bed clarifier (2) that agent and adsorbent are the bed material, gas-solid separator (4), surge bunker (5) and mixing granulation device (8), the arrival end of described fluid bed clarifier (2) is provided with de Laval noz(zle) (1) and the bed material inlet (12) that tail gas is quickened, de Laval noz(zle) (1) other end and garbage incinerating tail gas inlet (13) join, it is characterized in that: bed material inlet (12) joins with the outlet of mixing granulation device (8), mixing granulation device (8) is equipped with a plurality of batching inlets and joins with batcher (7), batcher (7) other end and surge bunker (5) join, surge bunker (5) top and side top are equipped with gas-solid separator (4) and discharge machine (6), gas-solid separator (4) top and side top are equipped with clean gas outlet (14) and horizontal connection tube (3), and the outlet of horizontal connection tube (3) other end and fluid bed clarifier (2) is joined.
6, to come the 5 described devices that are used for comprehensive garbage incinerating tail gas purifying according to right, it is characterized in that: be provided with deduster between described horizontal connection tube (3) and gas-solid separator (4) junction, this deduster can be sack cleaner, cyclone dust collectors, electrostatic precipitator or their organic assembling body; Described clean gas outlet is provided with air-introduced machine in (14).
7, according to the described device that is used for comprehensive garbage incinerating tail gas purifying of claim 6, it is characterized in that: a plurality of batching inlets of described mixing granulation device (8) are admission port (11), active carbon material inlet (10) and pulverized limestone material inlet (9).
8, according to the described device that is used for comprehensive garbage incinerating tail gas purifying of claim 7, it is characterized in that: thin, the thick hyperbola pipe in two ends in the middle of the shape of described de Laval noz(zle) (1) is.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001098748A CN1137759C (en) | 2000-07-10 | 2000-07-10 | Comprehensive garbage incinerating tail gas purifying method and equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001098748A CN1137759C (en) | 2000-07-10 | 2000-07-10 | Comprehensive garbage incinerating tail gas purifying method and equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1332334A CN1332334A (en) | 2002-01-23 |
| CN1137759C true CN1137759C (en) | 2004-02-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB001098748A Expired - Lifetime CN1137759C (en) | 2000-07-10 | 2000-07-10 | Comprehensive garbage incinerating tail gas purifying method and equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1137759C (en) |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100409924C (en) * | 2006-06-13 | 2008-08-13 | 冯之军 | Coal-fired smoke boiler purifier and purification |
| CN102641645B (en) * | 2011-02-18 | 2015-06-17 | 宝山钢铁股份有限公司 | Removing system for sintering fuel gas dioxin and method thereof |
| CN102674448B (en) * | 2012-05-30 | 2014-12-10 | 成都易态科技有限公司 | Titanium tetrachloride production method and equipment and titanium tetrachloride gas-state dust removal process |
| CN102674447B (en) * | 2012-05-30 | 2014-11-05 | 成都易态科技有限公司 | Method and equipment for purifying mixed gas containing chlorine |
| CN103272475B (en) * | 2013-05-31 | 2016-02-03 | 神华集团有限责任公司 | The desulphurization system of CFBB |
| CN107233793A (en) * | 2016-03-29 | 2017-10-10 | 沈阳铝镁设计研究院有限公司 | A kind of electrolytic aluminum smoke desulfurizer and sulfur method |
| CN105953236B (en) * | 2016-05-28 | 2018-06-19 | 杨芳芳 | A kind of igelite waste disposal method |
| CN108592065A (en) * | 2018-03-16 | 2018-09-28 | 赵登强 | A kind of environmental protection flue gas waste heat recovery apparatus |
| CN109173539A (en) * | 2018-11-02 | 2019-01-11 | 成都芯飞环保智能设备有限公司 | Based on the pretreated paint spray booth exhaust treatment system of pulverized limestone circulation absorption |
| CN109621636A (en) * | 2018-11-15 | 2019-04-16 | 华中科技大学 | A kind of municipal waste combustion flue gas purification system |
| CN110052089A (en) * | 2019-04-01 | 2019-07-26 | 浙江菲达环保科技股份有限公司 | A kind of Hg, SO3The sack cleaner of cooperation-removal |
| CN110657434A (en) * | 2019-10-21 | 2020-01-07 | 华南理工大学 | Garbage incinerator and method for dechlorination and heavy metal recovery in furnace |
| CN112111304B (en) * | 2020-09-24 | 2021-05-14 | 新奥科技发展有限公司 | Fly ash circulating gasification system and recovery treatment method of fly ash in coal gas |
| CN113289441A (en) * | 2021-06-04 | 2021-08-24 | 中国矿业大学 | Device and method for purifying domestic garbage cracking gasification tail gas |
-
2000
- 2000-07-10 CN CNB001098748A patent/CN1137759C/en not_active Expired - Lifetime
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| CN1332334A (en) | 2002-01-23 |
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