CN1181285C - Water coal pulp fluidized suspension high effect cleaning combustion technology - Google Patents
Water coal pulp fluidized suspension high effect cleaning combustion technology Download PDFInfo
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- CN1181285C CN1181285C CNB021098522A CN02109852A CN1181285C CN 1181285 C CN1181285 C CN 1181285C CN B021098522 A CNB021098522 A CN B021098522A CN 02109852 A CN02109852 A CN 02109852A CN 1181285 C CN1181285 C CN 1181285C
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Abstract
The present invention relates to a fluidizing-suspension efficient and clean combustion technology of coal water slurry, the technology comprises the following steps: step 1, quartz sand and limestone with required granularity are added onto a combustion device with non-uniformed air distribution through a feeding device of coal bed materials, and the height of the bed material layer is 200 to 450mm; step 2, the bed materials are heated to 400 DEG C by hot fumes and the primary air when starting, and are in a fluidized state in a dense-phase region; step 3, beads of coal water slurry are dropped into the dense-phase region by the feeding device and quickly heated by the fluidized bed materials to combust with the temperature of 850 to 950 DEG C; step 4, the fluidized coal water slurry, which is disassembled to fine particles or a cluster of particles of the coal water slurry, is carried from the dense-phase region to a suspension combustion chamber in a loose-phase region by hot fumes and continues to combust in suspension; step 5, the secondary air enters the combustion chamber through the upper side of the dense-phase region to strengthen disturbance and provide the required air for combustion; step 6, after combustion, the hot fumes with partial bed materials and the cluster of particles of the coal water slurry enter a device of separation and feedback burning to burn out; step 7, the bed materials and the cluster of particles of coal water slurry in the high-temperature fumes are captured by a separator and return to the dense-phase region to combust circularly. The present invention has the advantages of desulphurization, NOx generation suppression, no coke, etc.
Description
Technical field
The invention belongs to coal powder burning technology field, relate to a kind of water coal pulp fluidized suspension high effect cleaning combustion technology, particularly a kind ofly collect CFBC and the water-coal-slurry suspension combustion is the compound combustion technology of one.
Background technology
Up to now, in the water-coal-slurry suspension combustion process, high-temperature coking is never effectively solved.In addition, the hot environment of suspension combustion, especially the temperature in combustion centre district can reach about 1500-1800 ℃, increased the NOX discharge capacity, also be difficult to simultaneously direct desulfurization in combustion process, cause environmental pollution, the water-coal-slurry suspension combustion is still needed, and atomizing slurry rifle, burner, filter etc. install and complicated high-pressure blast is starched induction system.
Summary of the invention
The object of the present invention is to provide a kind of water coal pulp fluidized suspension high effect cleaning combustion technology, solve effectively in the water-coal-slurry suspension combustion process, especially the difficult problem of high-temperature coking in little space combustor, effectively generation and the discharging of control NOX, direct desulfurization in combustion process reduces the discharging of SO2 etc.
Water coal pulp fluidized suspension high effect cleaning combustion technology is characterized in that this burning process mainly comprises following process:
Water coal pulp fluidized suspension high effect cleaning burns firing technique, it is characterized in that this burning process mainly comprises the following steps:
By medium bed material supplementary device, with the quartz sand of required granularity, the medium bed material that lime stone constitutes, be added on the air distribution plate of non-impartial cloth wind burner, its medium bed thickness of feed layer is 200-450mm;
The combustion chamber tube bank water flowing of being heated, the air distribution plate bottom from the above mentioned or the hot smoke generator on top spray hot flue gas, from a wind of blower fan, make medium bed material be in fluidized state, and hot flue gas is heated to 400 ℃ with described medium bed material;
By the feeding device that is provided with around the furnace roof upper collecting chamber outlet with air purge, cooling effect, make and drip the shape water-coal-slurry under the self gravitation effect, drop into bottom, combustion chamber emulsion zone, and rapid fire burns under the medium bed material that in emulsion zone, the is fluidized heating, its temperature reaches 850-950 ℃;
Be in the water-coal-slurry group of fluidized state, further disintegrating is fine grained or water-coal-slurry cluster of grains, is taken out of emulsion zone by hot flue gas, and it is indoor to enter the suspension combustion of dilute-phase zone on its top, continues suspension combustion.
From the secondary wind of blower fan,, send into the suspension combustion chamber through combustion chamber emulsion zone upside overfiren air port;
The part of media bed material that hot flue gas after the burning carries, the cluster of grains with water-coal-slurry behind the fire burns forms enters separation by the furnace outlet smokestack and feeds back the burning device after-flame;
Entrained medium bed material in the high-temperature flue gas drips the cluster of grains of formation with the water-coal-slurry behind the fire burns, and separated device captures the emulsion zone that is fed back to the bottom, combustion chamber, realizes circulating combustion.
Above-mentioned burning process, the quartz sand of its described medium bed material and limestone granularity are all less than 5mm.
Aforesaid burning process, the lime stone administered dose in its described medium bed material is pressed sulfur content in the fuel, determines that calcium, sulphur mol ratio are 2-4.
Above-described burning process, its described wind, secondary wind blast are 7000-14000Pa.
Technical scheme provided by the invention has following advantage; (1) realizes the low-temperature burning technology of water-coal-slurry, solved the problem that the easy coking of water-coal-slurry suspension combustion brings, suppressed the generation of heating power type NOX simultaneously; (2) the medium bed material that utilizes quartz sand and lime stone (CaCO3) to constitute, and auxilliary in low-temperature burning, realized direct desulfurization in the coal-water slurry combustion, and desulfurization being simple, cost is low; (3) realizing the circulating combustion of the water-coal-slurry cluster of grains behind the fire burns, burnouting of combustible gas have higher efficiency of combustion; (4) adopt separation to feed back burning device, improved the utilization rate of lime stone, reduced the magnitude of recruitment of medium bed material, improved efficiency of combustion; (5) burner Load Regulation characteristic is good, can stable operation in 100% to 30% rated load scope, and water-coal-slurry quality adaptability is good, has reduced the requirement to the water-coal-slurry quality, reduces the slurrying cost; (6) save expensive burner and troublesome atomizing slurry rifle, do not needed equipment such as complicated high-pressure blast slurry system and filter.
Water coal pulp fluidized suspension high effect cleaning combustion technology provided by the invention is suitable for the boiler of various parameters, can be applicable on power station, Industrial Boiler.
The specific embodiment
The invention will be further described below by the specific embodiment:
With granularity all less than quartz sand and the lime stone of 5mm, by medium bed material supplementary device, be added on the air distribution plate of non-impartial cloth wind burner, medium bed thickness of feed layer is 200-450mm, wherein the lime stone administered dose is pressed sulfur content in the fuel, determines that calcium, sulphur mol ratio are 2-4.Water flowing in the combustion chamber is heated and restrains.From the wind of the 7000-14000Pa of blower fan, send into bed through non-impartial cloth wind burner, make medium bed material be in fluidized state.Hot flue gas by the ejection of the smoke generator of non-impartial cloth wind burner air distribution plate top or bottom enters the combustion chamber, and medium bed material is heated to about 400 ℃.
By the feeding device that is provided with around the furnace roof upper collecting chamber outlet with air purge, cooling effect, make the water-coal-slurry of dripping shape borrow self gravitation, drop in the emulsion zone of bottom, combustion chamber, be in the medium bed material heating of fluidized state rapid down fire burns, its temperature reaches 850-950 ℃; Be in the water-coal-slurry group of fluidized state, further disintegrating is fine grained or water-coal-slurry cluster of grains.Taken out of the fine grained and the water-coal-slurry cluster of grains of emulsion zone by hot flue gas, the suspension combustion of dilute-phase zone that enters its top is indoor, continues suspension combustion.Emulsion zone upside overfiren air port is sent into secondary wind through the combustion chamber, with the disturbance of strengthening dilute-phase zone with mix and the required oxygen of aftercombustion.The part of media bed material that hot flue gas after the burning carries, the cluster of grains with water-coal-slurry behind the fire burns forms enters separation through the furnace outlet smokestack and feeds back the burning device after-flame; Entrained medium bed material particle in the high-temperature flue gas drips the cluster of grains of formation with the water-coal-slurry behind the fire burns, and separated device captures the emulsion zone that is fed back to the bottom, combustion chamber, realizes circulating combustion.
The SO2 that generates in the combustion process generates CaSO4 with the CaO reaction that is become by the lime stone decomposes as mentioned above, realizes direct desulfurization in the combustion process.Medium bed material is added by medium bed material supplementary device in the combustion process.Generation CaSO4, lime-ash are discharged by drainage conduit.
The combustion chamber water in the tube bank that is heated with the vapour that produces behind the hot flue gas heat exchange--aqueous mixtures, enters upper drum by upper collecting chamber outlet and carries out vapour--moisture from, vapour is final products, the hot water circuit utilization of telling.
Claims (4)
1, water coal pulp fluidized suspension high effect cleaning combustion technology is characterized in that this burning process mainly comprises the following steps:
By medium bed material supplementary device, with the quartz sand of required granularity, the medium bed material that lime stone constitutes, be added on the air distribution plate of non-impartial cloth wind burner, its medium bed thickness of feed layer is 200-450mm;
The air distribution plate bottom from the above mentioned or the hot smoke generator on top spray hot flue gas, from a wind of blower fan, make medium bed material be in fluidized state, and hot flue gas is heated to 400 ℃ with described medium bed material;
By the feeding device that is provided with around the furnace roof upper collecting chamber outlet with air purge, cooling effect, make and drip the shape water-coal-slurry under the self gravitation effect, drop into bottom, combustion chamber emulsion zone, and rapid fire burns under the medium bed material that in emulsion zone, the is fluidized heating, its temperature reaches 850-950 ℃;
Be in the water-coal-slurry group of fluidized state, further disintegrating is fine grained or water-coal-slurry cluster of grains, is taken out of emulsion zone by hot flue gas, and it is indoor to enter the suspension combustion of dilute-phase zone on its top;
From the secondary wind of blower fan,, send into the suspension combustion chamber through combustion chamber emulsion zone upside overfiren air port;
The part of media bed material that hot flue gas after the burning carries, the cluster of grains with water-coal-slurry behind the fire burns forms enters separation by the furnace outlet smokestack and feeds back burning device;
Entrained medium bed material in the high-temperature flue gas drips the cluster of grains of formation with the water-coal-slurry behind the fire burns, and separated device captures the emulsion zone that is fed back to the bottom, combustion chamber, ciculation fluidized burning.
2, burning process according to claim 1 is characterized in that the quartz sand of described medium bed material and limestone granularity are all less than 5mm.
3, burning process according to claim 1 and 2 is characterized in that the lime stone administered dose in the described medium bed material, presses sulfur content in the fuel, determines that calcium, sulphur mol ratio are 2-4.
4, burning process according to claim 1 is characterized in that a described wind, secondary wind blast are 7000-14000Pa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021098522A CN1181285C (en) | 2002-05-23 | 2002-05-23 | Water coal pulp fluidized suspension high effect cleaning combustion technology |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021098522A CN1181285C (en) | 2002-05-23 | 2002-05-23 | Water coal pulp fluidized suspension high effect cleaning combustion technology |
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| Publication Number | Publication Date |
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| CN1459583A CN1459583A (en) | 2003-12-03 |
| CN1181285C true CN1181285C (en) | 2004-12-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB021098522A Expired - Fee Related CN1181285C (en) | 2002-05-23 | 2002-05-23 | Water coal pulp fluidized suspension high effect cleaning combustion technology |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013091454A1 (en) * | 2011-12-23 | 2013-06-27 | 青岛特利尔环保锅炉工程有限公司 | Process for treating industrial wastewater by means of suspended fluidized combustion of coal-water slurry |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103162287B (en) * | 2011-12-08 | 2015-12-09 | 青岛特利尔环保锅炉工程有限公司 | Water-coal-slurry suspension fluidization desulphurization and denitration burning process |
| CN103104912A (en) * | 2012-12-13 | 2013-05-15 | 青岛特利尔环保锅炉工程有限公司 | Circulating fluidized bed boiler for coal water slurry combustion |
| CN103438439B (en) * | 2013-08-26 | 2016-05-04 | 上海交通大学 | The organic working medium boiler of water-coal-slurry clean combustion |
| CN104197321B (en) * | 2014-07-24 | 2017-01-25 | 杭州福鼎节能科技服务有限公司 | Coal water slurry low-concentration oxygen enrichment fluidization suspension combustion method and boiler device thereof |
| CN108916867A (en) * | 2018-09-06 | 2018-11-30 | 青岛特利尔环保股份有限公司 | A kind of ciculation fluidized burning boiler low nitrogen burning technique |
-
2002
- 2002-05-23 CN CNB021098522A patent/CN1181285C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013091454A1 (en) * | 2011-12-23 | 2013-06-27 | 青岛特利尔环保锅炉工程有限公司 | Process for treating industrial wastewater by means of suspended fluidized combustion of coal-water slurry |
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| CN1459583A (en) | 2003-12-03 |
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