CN100586535C - Flyash mixing desulfurizing-agent back-blowing secondary-burning high-efficiency energy-saving desulfurizing dust-removing method and equipment thereof - Google Patents
Flyash mixing desulfurizing-agent back-blowing secondary-burning high-efficiency energy-saving desulfurizing dust-removing method and equipment thereof Download PDFInfo
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- CN100586535C CN100586535C CN200610069181A CN200610069181A CN100586535C CN 100586535 C CN100586535 C CN 100586535C CN 200610069181 A CN200610069181 A CN 200610069181A CN 200610069181 A CN200610069181 A CN 200610069181A CN 100586535 C CN100586535 C CN 100586535C
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- desulfurizing
- dust
- desulfurizing agent
- flyash
- blender
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- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 60
- 230000003009 desulfurizing effect Effects 0.000 title claims abstract description 58
- 239000010881 fly ash Substances 0.000 title claims abstract description 39
- 238000002156 mixing Methods 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000007664 blowing Methods 0.000 title claims description 13
- 238000002347 injection Methods 0.000 claims abstract description 7
- 239000007924 injection Substances 0.000 claims abstract description 7
- 239000002956 ash Substances 0.000 claims abstract description 5
- 238000002485 combustion reaction Methods 0.000 claims abstract description 5
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 5
- 230000023556 desulfurization Effects 0.000 claims abstract description 5
- 239000007921 spray Substances 0.000 claims description 23
- 239000003500 flue dust Substances 0.000 claims description 22
- 238000003756 stirring Methods 0.000 claims description 15
- 239000003245 coal Substances 0.000 claims description 14
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 6
- 230000008676 import Effects 0.000 claims description 6
- 229910052717 sulfur Inorganic materials 0.000 claims description 5
- 239000011593 sulfur Substances 0.000 claims description 5
- 239000000843 powder Substances 0.000 claims description 3
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical group [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 2
- 239000000920 calcium hydroxide Substances 0.000 claims description 2
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 2
- 235000011116 calcium hydroxide Nutrition 0.000 claims description 2
- 235000015111 chews Nutrition 0.000 claims description 2
- 238000011049 filling Methods 0.000 claims description 2
- 238000011068 loading method Methods 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 6
- 239000000428 dust Substances 0.000 description 6
- 239000003546 flue gas Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 239000000779 smoke Substances 0.000 description 4
- GBAOBIBJACZTNA-UHFFFAOYSA-L calcium sulfite Chemical compound [Ca+2].[O-]S([O-])=O GBAOBIBJACZTNA-UHFFFAOYSA-L 0.000 description 3
- 235000010261 calcium sulphite Nutrition 0.000 description 3
- 230000007812 deficiency Effects 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 235000011941 Tilia x europaea Nutrition 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000012467 final product Substances 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 239000004571 lime Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000005864 Sulphur Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000003541 multi-stage reaction Methods 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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- Treating Waste Gases (AREA)
Abstract
The present invention discloses a backblowing secondary combustion high-effective energy-saving desulfurization dust-removing method by mixing fly-ash with desulfurizing agent and its equipment. Saidequipment includes the following several portions: supporting frame platform, dust-removing device, desulfurizing agent charging device, ash-collecting bucket, air-blower, four-way injection material-mixing device and air pipe. The desulfurizing agent charging device, air-blower and dust-removing device are mounted in the upper portion of said supporting frame platform, the ash-collecting bucket is placed in the lower portion of said supporting frame platform, the ash outlet of said dust-removing device is communicated with upper cover of ash-collecting bucket, and the air outlet of air-bloweris connected with air inlet of four-way injection material-mixing device placed in the fly-ash outlet positioned in the lower end of ash-collecting bucket by means of air pipe.
Description
1, technical field
The present invention relates to a kind of boiler fired coal energy-saving equipment, especially a kind of indoor flyash mixing desulfurizing-agent back-blowing secondary-burning high-efficiency energy-saving desulfurizing dust-removing method and equipment thereof of being installed on.
2, background technology
Various boiler, especially chain furnace of the prior art have a large amount of fines and just are discharged without burning because of the deficiency in the design in the use, both polluted environment, have influenced the boiler output problem and the coal-fired thermal efficiency again.In order to solve the insufficient problems of bringing such as pollution of fines burning, the normal at present method of using is a cleaner such as water receiving film dust-remover behind boiler flue.But because of fines too high levels in the flue gas, over-burden to cause cleaner, not only wasted a large amount of energy, also shortened the service life of deduster.
In addition, in the coal burning process, the sulphur in the coal can generate SO
2Gas not only can corrode boiler flue, chimney etc., reduces the service life of boiler, also can enter atmosphere, contaminated environment.In order to solve SO
2Pollution problems, the main boiler tail that adopts installs the mode desulfurization of desulfurizer or the mode of stirring desulphurization agent in coal etc. additional in the prior art.Wherein, the method that increases desulfurizer at boiler tail is most widely used, but the investment cost of this method is generally higher, the good equipment of some desulfurized effects especially, and general medium-sized and small enterprises all can't bear.And in coal the method for stirring desulphurization agent, it operates more complicated, if stir the irregular desulfurized effect preferably that not only do not have, also can have a strong impact on the thermal efficiency of boiler.
3, summary of the invention
Technical assignment of the present invention is at above-mentioned deficiency of the prior art, and a kind of flyash mixing desulfurizing-agent back-blowing secondary-burning high-efficiency energy-saving desulfurizing dust-removing method and the employed equipment thereof that can realize purposes such as boiler depositing dust, desulfurization and synergy simultaneously is provided.
The technical solution adopted for the present invention to solve the technical problems is: method step is as follows: a, be collected in the flue-dust retainer flyash standby by traditional flyash gathering-device; Standby in the desulfurizing agent feeding device of b, desulfurizing agent filling forward (FWD) stirring and drawing-in device; C, flue-dust retainer, desulfurizing agent feeding device are sprayed blender by pipeline and four-way is connected, the air inlet that four-way sprays blender is connected with the air outlet of air blast, and the air outlet of four-way injection blender is connected with spout in being arranged on burner hearth by pipeline; Flyash after d, the boiler combustion and desulfurizing agent four-way spray mix in the blender after, carry out desulfurization, dedusting and reduction coal consumption by second-time burning in the air blast blowback back boiler burner hearth.
The flyash mixing desulfurizing-agent back-blowing secondary-burning high-efficiency energy-saving desulfurizing dust arrester is set between boiler and water dust scrubber, utilizes air supply mode, blow to the main combustion zone of fire grate together with failing clean-burning flyash with desulfurizing agent.
This equipment is by rack platform, deduster, the desulfurizing agent feeding device, flue-dust retainer, air blast, four-way sprays blender and airduct is formed, deduster, the desulfurizing agent feeding device, air blast and deduster are arranged on the top of rack platform, flue-dust retainer is arranged on the bottom of rack platform, the ash hole of deduster is connected with the loam cake of flue-dust retainer, the air outlet of air blast is connected with the air inlet that the flyash exit four-way that is arranged on the flue-dust retainer lower end sprays blender by airduct, the flyash import that four-way sprays blender is connected with the flyash outlet of flue-dust retainer, the desulfurizing agent import that four-way sprays blender is connected by the discharging opening of pipeline with desulfurizing agent feeding device bottom, and the air outlet of four-way injection blender is connected with flyash spout in being arranged on boiler furnace by pipeline.
Four-way sprays blender and is positioned at the air inlet place and is provided with spray wind and chews.
The flue-dust retainer support is provided with n desulfurizing agent feeding device and flue-dust retainer, 2n deduster, n=1-4.
The desulfurizing agent feeding device is to be made of tank body, motor, reductor and stirring feeder, stirring feeder is vertically set in the tank body, its upper end joins with the reductor that is arranged on tank body top, motor is connected with reductor by belt, the lower end of stirring feeder is connected with the screw feeding bar, and it extends the discharging opening of tank base.
The desulfurizing agent that is equipped with in the described desulfurizing agent feeding device is a white lime.
Desulfation dust-extraction device of the present invention uses after can being connected boiler flue separately, also can be serially connected between boiler flue and the next stage smoke dust-removing equipment and use.The flyash that air blast will contain a large amount of fines is sent burner hearth back in the lump together with desulfurizing agent (white lime).Flyash is able to the second-time burning utilization.A part of powder of desulfurizing agent is fallen on the coal seam, with the reaction of Salmon-Saxl in the coal, generates calcium sulfate or calcium sulfite, discharges with lime-ash; A part in burner hearth with the sulfur dioxide gas precursor reactant that generates, generate calcium sulfite, enter back-end ductwork with flying dust, separate through deduster, a part falls, a part enters next stage deduster (preferred water film dust-remover with flue gas, through mixing with water, calcium oxide and water generate aqua calcis, react with sulfur in smoke again, generate calcium sulfite solution, discharge) with dedusting water.
Flyash mixing desulfurizing-agent back-blowing secondary-burning high-efficiency energy-saving desulfurizing dust-removing method of the present invention and employed equipment thereof are compared with prior art, have following outstanding beneficial effect:
(1) utilizes deduster that the flyash in the boiler smoke is collected, oppositely send into boiler furnace with air blast and carry out second-time burning, improved the flue gas disturbance in the body of heater, strengthen the oxygen-rich area oxygen content, improve the burner hearth combustion intensity, reduced coal consumption and cost.
(2) utilize the backwind tube oppositely send into flyash that desulfurizing agent is sent into burner hearth in the lump, through with flue gas in SO
2With the SO in the fire coal
2After the multistep reaction, can effectively reduce SO in the flue gas
2Content, overcome the deficiency that labour intensity in desulfurizing agent and the coal whipping process is big, stir irregular generation negative effect, greatly reduced labour intensity and running cost.
(3) because enter fines content and SO in the flue gas of deduster (as water dust scrubber) next time
2Content reduces greatly, so greatly reduced rear portion deduster and Corrosion of Pipeline, has effectively prolonged the service life of boiler plant.
(4) have simple in structure, little, the instant effect of investment, be easy to characteristics such as construction, easy operating.
4, description of drawings
Accompanying drawing 1 is the overall structure schematic diagram of flyash mixing desulfurizing-agent back-blowing secondary-burning high-efficiency energy-saving desulfurizing cleaner;
Accompanying drawing 2 is structural representations of desulfurizing agent feeding device shown in Figure 1;
Accompanying drawing 3 is that the four-way among Fig. 1 sprays the structure for amplifying schematic diagram of blender at the B place.
5, the specific embodiment
Explain below with reference to Figure of description flyash mixing desulfurizing-agent back-blowing secondary-burning high-efficiency energy-saving desulfurizing cleaner of the present invention being done.
As accompanying drawing 1, shown in 2, flyash mixing desulfurizing-agent back-blowing secondary-burning high-efficiency energy-saving desulfurizing dust arrester of the present invention is by rack platform 1, deduster 2, the desulfurizing agent feeding device, flue-dust retainer 3, air blast 4, four-way sprays blender and airduct 5 is formed, the desulfurizing agent feeding device, air blast 4 and deduster 2 are arranged on the top of rack platform 1, flue-dust retainer 3 is arranged on the bottom of rack platform 1, the ash hole of deduster 2 is connected with the loam cake of flue-dust retainer 3, the air outlet of air blast 4 is connected with the air inlet that the flyash exit four-way that is arranged on flue-dust retainer 3 lower ends sprays blender by airduct 5, the flyash import 13 that four-way sprays blender is connected with the flyash outlet of flue-dust retainer 3, the desulfurizing agent import 12 that four-way sprays blender is connected by the discharging opening of pipeline with desulfurizing agent feeding device bottom, and the air outlet of four-way injection blender is connected with flyash spout 15 in being arranged on boiler furnace 14 by pipeline 5.
As shown in Figure 3, four-way sprays and to be positioned at airduct 5 air inlet places in the blender and to be provided with spray wind and to chew 6.The addition of desulfurizing agent is to decide according to the sulfur content of fire coal, and the weight ratio of sulfur content and desulfurizing agent is 1: 1.5, and blast is controlled at 1-2MPa.
As shown in Figure 2, the desulfurizing agent feeding device is to be made of tank body 7, motor 9, reductor 10 and stirring feeder 8, the stirring feeder 8 of belt stirrer 16 is vertically set in the tank body 7, its upper end joins with the reductor 10 that is arranged on tank body 7 tops, motor 9 is connected with reductor 10 by belt, the lower end of stirring feeder 8 is connected with screw feeding bar 11, and screw feeding bar 11 lower ends extend the desulfurizing agent discharging opening of tank body 7 bottoms.
The desulfurizing agent of loading in the tank body 7 of desulfurizing agent feeding device is a hydrated lime in powder.
Institute's use deduster 2 can be selected any deduster in the prior art for use among the present invention, as multicyclone etc.
During use, the horn-like flyash spout 15 of airduct 5 ends is passed in the burner hearth 14 that flue feeds boiler; The air inlet and the boiler flue of deduster 2 are joined, and the air inlet of the logical next stage smoke dust-removing equipment in gas outlet gets final product.Connected mode is prior art.
Its processing and fabricating of flyash mixing desulfurizing-agent back-blowing secondary-burning high-efficiency energy-saving desulfurizing cleaner of the present invention is very simple and convenient, gets final product according to universal machine processing method processing and fabricating shown in the by specification accompanying drawing.
Claims (7)
1, flyash mixing desulfurizing-agent back-blowing secondary-burning high-efficiency energy-saving desulfurizing dust-removing method is characterized in that, step is as follows: a, be collected in the flue-dust retainer flyash standby by traditional flyash gathering-device; Standby in the desulfurizing agent feeding device of b, desulfurizing agent filling forward (FWD) stirring and drawing-in device; C, flue-dust retainer, desulfurizing agent feeding device are sprayed blender by pipeline and four-way is connected, the air inlet that four-way sprays blender is connected with the air outlet of air blast, and the air outlet of four-way injection blender is connected with spout in being arranged on burner hearth by pipeline; Flyash after d, the boiler combustion and desulfurizing agent four-way spray mix in the blender after, carry out desulfurization, dedusting and reduction coal consumption by second-time burning in the air blast blowback back boiler burner hearth.
2, flyash mixing desulfurizing-agent back-blowing secondary-burning high-efficiency energy-saving desulfurizing dust-removing method according to claim 1, the addition that it is characterized in that desulfurizing agent is to decide according to the sulfur content of fire coal, the weight ratio of sulfur content and desulfurizing agent is 1: 1.5, and blast is controlled at 1-2MPa.
3, a kind of high-efficiency energy-saving desulfurizing cleaner that is used for flyash mixing desulfurizing-agent back-blowing secondary-burning, it is characterized in that, this equipment comprises rack platform, deduster, the desulfurizing agent feeding device, flue-dust retainer, air blast, four-way sprays blender and airduct, the desulfurizing agent feeding device, air blast and deduster are arranged on the top of rack platform, flue-dust retainer is arranged on the bottom of rack platform, the ash hole of deduster is connected with the loam cake of flue-dust retainer, the air outlet of air blast is connected with the air inlet that the flyash exit four-way that is arranged on the flue-dust retainer lower end sprays blender by airduct, the flyash import that four-way sprays blender is connected with the flyash outlet of flue-dust retainer, the desulfurizing agent import that four-way sprays blender is connected by the discharging opening of pipeline with desulfurizing agent feeding device bottom, and the air outlet of four-way injection blender is connected with flyash spout in being arranged on boiler furnace by pipeline.
4, desulfurating dust-removing equipment according to claim 3 is characterized in that, four-way sprays blender and is positioned at the air inlet place and is provided with spray wind and chews.
5, desulfurating dust-removing equipment according to claim 3 is characterized in that, rack platform is provided with n desulfurizing agent feeding device and flue-dust retainer, 2n deduster, n=1-4.
6, desulfurating dust-removing equipment according to claim 3, it is characterized in that, described desulfurizing agent feeding device is to be made of tank body, motor, reductor and stirring feeder, stirring feeder is vertically set in the tank body, the upper end joins with the reductor that is arranged on tank body top, motor is connected with reductor by belt, and the lower end of stirring feeder is connected with the screw feeding bar, and the screw feeding bar extends the discharging opening of tank base.
7, desulfurating dust-removing equipment according to claim 3 is characterized in that, the desulfurizing agent of loading in the described desulfurizing agent feeding device is hydrated lime in powder or Paris white.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610069181A CN100586535C (en) | 2006-10-19 | 2006-10-19 | Flyash mixing desulfurizing-agent back-blowing secondary-burning high-efficiency energy-saving desulfurizing dust-removing method and equipment thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610069181A CN100586535C (en) | 2006-10-19 | 2006-10-19 | Flyash mixing desulfurizing-agent back-blowing secondary-burning high-efficiency energy-saving desulfurizing dust-removing method and equipment thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101164661A CN101164661A (en) | 2008-04-23 |
| CN100586535C true CN100586535C (en) | 2010-02-03 |
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| CN200610069181A Active CN100586535C (en) | 2006-10-19 | 2006-10-19 | Flyash mixing desulfurizing-agent back-blowing secondary-burning high-efficiency energy-saving desulfurizing dust-removing method and equipment thereof |
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| CN106196124A (en) * | 2016-08-23 | 2016-12-07 | 苏州泰盛新绿节能环保科技有限公司 | A kind of coal-burning boiler assembly reducing smoke evacuation oxygen content |
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Owner name: SUN QIYU Free format text: FORMER OWNER: JIANG PENG Effective date: 20100122 |
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Effective date of registration: 20100122 Address after: Zibo Hongyuan Coking Co., Ltd., Boshan District, Shandong, Zibo Province, China: 255200 Co-patentee after: Lv Yingzhi Patentee after: Sun Kai Yu Co-patentee after: Sun Zheng Address before: Shandong province Ji'nan City Lixia District Kiln Road No. 2-43 zip code: 250014 Patentee before: Jiang Peng |