CN103104929A - Peat fuel high-efficient clean combustion method and circulative suspension fluidization boiler - Google Patents
Peat fuel high-efficient clean combustion method and circulative suspension fluidization boiler Download PDFInfo
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- CN103104929A CN103104929A CN2012105383190A CN201210538319A CN103104929A CN 103104929 A CN103104929 A CN 103104929A CN 2012105383190 A CN2012105383190 A CN 2012105383190A CN 201210538319 A CN201210538319 A CN 201210538319A CN 103104929 A CN103104929 A CN 103104929A
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- fuel
- combustion
- combustion chamber
- flue gas
- separating
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- 239000000446 fuel Substances 0.000 title claims abstract description 50
- 238000009841 combustion method Methods 0.000 title claims abstract description 17
- 239000000725 suspension Substances 0.000 title claims abstract description 13
- 238000005243 fluidization Methods 0.000 title abstract description 3
- 239000003415 peat Substances 0.000 title abstract 6
- 238000002485 combustion reaction Methods 0.000 claims abstract description 80
- 239000002245 particle Substances 0.000 claims abstract description 22
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 15
- 230000003009 desulfurizing effect Effects 0.000 claims abstract description 6
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 35
- 239000003546 flue gas Substances 0.000 claims description 35
- 239000003245 coal Substances 0.000 claims description 27
- 239000007789 gas Substances 0.000 claims description 17
- 230000002269 spontaneous effect Effects 0.000 claims description 6
- 239000008187 granular material Substances 0.000 claims description 5
- 238000011084 recovery Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 6
- 239000000779 smoke Substances 0.000 abstract 6
- 238000007781 pre-processing Methods 0.000 abstract 3
- 230000000694 effects Effects 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 239000003250 coal slurry Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000006477 desulfuration reaction Methods 0.000 description 2
- 230000023556 desulfurization Effects 0.000 description 2
- 239000000839 emulsion Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 235000019738 Limestone Nutrition 0.000 description 1
- 239000006004 Quartz sand Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
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Abstract
The invention discloses a peat fuel high-efficient clean combustion method and a circulative suspension fluidization boiler. The method comprises the following steps: step1, preprocessing, namely that preprocessing is conducted on peat, denitration agents and/or desulfurizing agents are added to the peat to make into syrup-shaped fuel; step 2, feeding, namely that the fuel is fed in by a feeder nearby a smoke outlet of a combustion room; step 3, combustion, namely that high-temperature smoke inside the combustion room ensures that the temperature of the fuel in the combustion room quickly rises and the fuel is burned; and step 4, separating and recovering, namely that smoke generated after the fuel inside the combustion room is burned enters a separating and recovering device, fuel particles carried by the smoke are separated, the separated fuel particles are transferred to the combustion room for circulative combustion. Because preprocessing is conducted on the peat, and the denitration agents and/or the desulfurizing agents are added to the peat, escapement rates of oxynitride and SO2 are effectively reduced, and atmospheric environment pollution caused by the oxynitride and the SO2 is reduced; and in the feeding process, because the fuel is fed in nearby the smoke outlet of the combustion room, partial particles in the smoke are again carried back to the combustion room and reburied, and combustion efficiency is improved.
Description
Technical field
The invention belongs to the combustion of industrial boiler field, relate in particular to a kind of mud coal fuel-efficient clean combustion method and implement the circulation suspension fluidized boiler of the method.
Background technology
In the combustion of industrial boiler field, mud coal acts as a fuel and has advantages of energy-efficiently, and is used widely.Wherein mud coal refers to take coal as main component, and the pulpous state fuel of mixing water and additive also can add other fuel sometimes, such as industrial sludge etc.publication number is CN1459583A, title is the patent documentation of water coal pulp fluidized suspension high effect cleaning combustion technology, it discloses a kind of cool water mixture burning technique and comprises quartz sand, lime stone is added on air distribution plate, make media bed material be in fluidized state, make and drip the shape water-coal-slurry under the self gravitation effect, drop into bottom, combustion chamber emulsion zone, and burn under the heating of the media bed material of fluidisation, hot flue gas after burning carries part coal body bed material and unburnt water-coal-slurry particle and enters to separate by the furnace outlet smokestack and feed back burning device, separated bottom, the combustion chamber emulsion zone of again sending back to of unburnt particle, ciculation fluidized burning.This scheme is compared with the traditional combustion mode, has improved efficiency of combustion, but its can not realize water-coal-slurry is carried out desulphurization denitration, and how further to improve efficiency of combustion.
Summary of the invention
The technical problem that the present invention solves be to provide a kind of can desulphurization denitration and improve the mud coal fuel-efficient clean combustion method of efficiency of combustion and the circulation suspension fluidized boiler of implementing the method.
In order to solve the problems of the technologies described above, the technical solution used in the present invention is, a kind of mud coal fuel-efficient clean combustion method comprises the following steps, step 1, and pretreatment is carried out pretreatment to mud coal, and adds denitrfying agent and/or desulfurizing agent, makes pulpous state fuel; Step 2 feeds intake, and uses cast feeder to dropping near the exhanst gas outlet of above-mentioned fuel spontaneous combustion chamber; Step 3, burning, the high-temperature flue gas in the combustion chamber heats up rapidly the fuel of putting in the combustion chamber, and burns; Step 4 separate to reclaim, and the flue gas that the fuel in combustion chamber burning produces enters separating and reclaiming device, to flue gas with fuel particle separate, and the fuel particle that separates is flowed to the combustion chamber again, carry out circulating combustion;
Compared to the prior art, in this programme, coal slime is carried out pretreatment, add therein denitrfying agent and/or desulfurizing agent, effectively reduce nitrogen oxide and SO
2Escapement ratio, reduce the pollution to atmospheric environment; When feeding intake, near the input of spontaneous combustion chamber exhanst gas outlet can again be taken back the combustion chamber with the part particle in flue gas and fire, improves efficiency of combustion.
Also comprise step 5, then combustion, enter through the flue gas after separate reclaiming and fire again the chamber, in flue gas not the granule of separated recovery burn again; Flue gas is through after separate reclaiming, still can residual a small amount of uncombusted particle, and for further burning, they are delivered to fire again the chamber, again burn, guarantee the fuel particle after-flame.
In step 3, the temperature in the combustion chamber is controlled at 800 ℃～950 ℃; Chamber temperature is controlled at 800 ℃～950 ℃, guarantees full combustion of fuel, and the desulfurized effect of denitration simultaneously is better.
In step 4, the temperature of separating and reclaiming device inside is controlled at 750 ℃～950 ℃; Separating and reclaiming device maintenance temperature and combustion chamber are basic identical; the denitrfying agent and the pulverized coal particle that bring in flue gas mix, and are oxygen debt environment in this device, for the denitration desulfurization provides good condition; fuel denitration effect through reclaiming separation is good, reaches on the whole the purpose of NO_x Reduction by Effective desulfurization.
In step 4, the flue gas flow rate of control combustion chamber and exhanst gas outlet makes bulky grain realize the suspended state burning, and the flue gas only fuel particle that granularity is little is taken the combustion chamber out of; By controlling the flow velocity of flue gas, the granularity of effectively regulating the fuel particle that carries in flue gas is better organized burning, realizes high performance clean burning, improves the efficiency of combustion of fuel.
A kind of circulation suspension fluidized boiler comprises cast feeder, exhanst gas outlet and combustion chamber, and cast feeder is arranged near exhanst gas outlet, also is provided with separating and reclaiming device, and the one end is communicated with exhanst gas outlet, and the other end is communicated with the bottom, combustion chamber; Also comprise and fire the chamber again, it is communicated with separating and reclaiming device; This boiler can satisfy the needs of above-mentioned combustion method.
Description of drawings
Fig. 1 is the partial structurtes schematic diagram of circulation suspension fluidized boiler of the present invention.
1. combustion chamber; 2. recovery separator; 3. fire again the chamber; 4. cast feeder.
The specific embodiment
Below in conjunction with drawings and Examples, the present invention is elaborated.
Embodiment one:
The present invention relates to a kind of mud coal fuel-efficient clean combustion method, comprise the following steps, step 1, pretreatment is carried out pretreatment with mud coal, and adds denitrfying agent and denitrfying agent, makes pulpous state fuel; Step 2 feeds intake, and uses near 4 pairs of inputs of above-mentioned fuel spontaneous combustion chamber 1 exhanst gas outlet of cast feeder; Step 3, burning, the high-temperature flue gas in combustion chamber 1 makes the fuel of putting in combustion chamber 1 form fluidized state, and burns, and the temperature in combustion chamber 1 is controlled at 800 ℃; Step 4 is separated and is reclaimed, and the flue gas that combustion chamber 1 fuel combustion produces enters separating and reclaiming device 2, to flue gas with fuel particle separate, and the fuel particle that separates is flowed to combustion chamber 1 again, and carry out circulating combustion, the temperature of separating and reclaiming device 2 inside is controlled at 750 ℃.
As improvement, also comprise step 5, then combustion, the flue gas after reclaiming through separation enters and fires chamber 3 again, and unsegregated granule in flue gas is burnt again.
Embodiment two:
The present invention relates to a kind of mud coal fuel-efficient clean combustion method, comprise the following steps, step 1, pretreatment is carried out pretreatment with mud coal, and adds denitrfying agent, makes pulpous state fuel; Step 2 feeds intake, and uses near 4 pairs of inputs of above-mentioned fuel spontaneous combustion chamber 1 exhanst gas outlet of cast feeder; Step 3, burning, the high-temperature flue gas in combustion chamber 1 makes the fuel of putting in combustion chamber 1 form circulation suspension fluidized state, and burns, and the temperature in combustion chamber 1 is controlled at 950 ℃; Step 4 is separated and is reclaimed, and the flue gas that combustion chamber 1 fuel combustion produces enters separating and reclaiming device 2, to flue gas with fuel particle separate, and the fuel particle that separates is flowed to combustion chamber 1 again, and carry out circulating combustion, the temperature of separating and reclaiming device 2 inside is controlled at 950 ℃.
As improvement, also comprise step 5, then combustion, the flue gas after reclaiming through separation enters and fires chamber 3 again, and unsegregated granule in flue gas is burnt again.
Embodiment three:
The present invention relates to a kind of mud coal fuel-efficient clean combustion method, comprise the following steps, step 1, pretreatment is carried out pretreatment with mud coal, and adds desulfurizing agent, makes pulpous state fuel; Step 2 feeds intake, and uses near 4 pairs of inputs of above-mentioned fuel spontaneous combustion chamber 1 exhanst gas outlet of cast feeder; Step 3, burning, the high-temperature flue gas in combustion chamber 1 heats up rapidly the fuel of putting in combustion chamber 1, forms the suspension fluidized state, and burns, and the temperature in combustion chamber 1 is controlled at 850 ℃; Step 4 is separated and is reclaimed, and the flue gas that combustion chamber 1 fuel combustion produces enters separating and reclaiming device 2, to flue gas with fuel particle separate, and the fuel particle that separates is flowed to combustion chamber 1 again, and carry out circulating combustion, the temperature of separating and reclaiming device 2 inside is controlled at 850 ℃.
As improvement, also comprise step 5, then combustion, the flue gas after reclaiming through separation enters and fires chamber 3 again, and unsegregated granule in flue gas is burnt again.
Embodiment four:
The invention still further relates to a kind of circulation suspension fluidized boiler of implementing said method, comprise cast feeder 4, exhanst gas outlet and combustion chamber 1, cast feeder 4 is arranged near exhanst gas outlet, also is provided with separating and reclaiming device 2, the one end is communicated with exhanst gas outlet, and the other end is communicated with 1 bottom, combustion chamber; Also comprise and fire chamber 3 again, it is communicated with separating and reclaiming device 2.
| Temperature (℃) | 750 | 800 | 850 | 950 | 1000 |
| Mud coal combustion rate (%) | 90 | 95 | 96 | 98 | 98.5 |
| The SO2 growing amount | 1.13 | 1.1 | 1 | 1.1 | 1.13 |
| The NOx growing amount | 1.13 | 1.1 | 1 | 1.1 | 1.13 |
Annotate: when in upper table, SO2 and NOx growing amount are take 850 ℃, growing amount is 1 unit.
Claims (7)
1. mud coal fuel-efficient clean combustion method is characterized in that: comprises the following steps, and step 1, pretreatment is carried out pretreatment to mud coal, and adds denitrfying agent and/or desulfurizing agent, makes pulpous state fuel; Step 2 feeds intake, and uses cast feeder to dropping near the exhanst gas outlet of above-mentioned fuel spontaneous combustion chamber; Step 3, burning, the high-temperature flue gas in the combustion chamber heats up rapidly the fuel of putting in the combustion chamber, and burns; Step 4 separate to reclaim, and the flue gas that the fuel in combustion chamber burning produces enters separating and reclaiming device, to flue gas with fuel particle separate, and the fuel particle that separates is flowed to the combustion chamber again, carry out circulating combustion.
2. mud coal fuel-efficient clean combustion method according to claim 1 is characterized in that: also comprise step 5, then combustion, enter and fire again the chamber through separating flue gas after reclaiming, in flue gas not the granule of separated recovery burn again.
3. described mud coal fuel-efficient clean combustion method according to claim 1 and 2, it is characterized in that: in step 3, the temperature in the combustion chamber is controlled at 800 ℃～950 ℃.
4. described mud coal fuel-efficient clean combustion method according to claim 1 and 2 is characterized in that: in step 4, the temperature of separating and reclaiming device inside is controlled at 750 ℃～950 ℃.
5. described mud coal fuel-efficient clean combustion method according to claim 1 and 2 is characterized in that: in step 4, the flue gas flow rate of control combustion chamber and exhanst gas outlet, make flue gas only the fuel particle that granularity is little take the combustion chamber out of.
6. circulation suspension fluidized boiler of implementing the described mud coal fuel-efficient of claim 1 clean combustion method, comprise cast feeder, exhanst gas outlet and combustion chamber, it is characterized in that: cast feeder is arranged near exhanst gas outlet, also be provided with separating and reclaiming device, the one end is communicated with exhanst gas outlet, and the other end is communicated with the bottom, combustion chamber.
7. implement according to claim 6 the circulation suspension fluidized boiler of the described mud coal fuel-efficient of claim 1 clean combustion method, it is characterized in that: also comprise and fire the chamber again, it is communicated with separating and reclaiming device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210538319.0A CN103104929B (en) | 2012-12-13 | 2012-12-13 | Mud coal fuel-efficient clean combustion method and circulation suspension fluidization boiler |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210538319.0A CN103104929B (en) | 2012-12-13 | 2012-12-13 | Mud coal fuel-efficient clean combustion method and circulation suspension fluidization boiler |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103104929A true CN103104929A (en) | 2013-05-15 |
| CN103104929B CN103104929B (en) | 2016-03-30 |
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| CN201210538319.0A Expired - Fee Related CN103104929B (en) | 2012-12-13 | 2012-12-13 | Mud coal fuel-efficient clean combustion method and circulation suspension fluidization boiler |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103697467A (en) * | 2014-01-09 | 2014-04-02 | 北京兴侨国际工程技术有限公司 | Method for coal slime combustion of circulating fluidized bed boiler |
| CN106090893A (en) * | 2016-06-29 | 2016-11-09 | 无锡锡能锅炉有限公司 | A kind of high performance clean burning method of coal-burning boiler |
| CN109539295A (en) * | 2018-12-06 | 2019-03-29 | 广东清远蒙娜丽莎建陶有限公司 | With baking sulphur intelligence feeding system in a kind of furnace |
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|---|---|---|---|---|
| CN1219666A (en) * | 1997-12-08 | 1999-06-16 | 机械工业部上海发电设备成套设计研究所 | Box type circulating fluidized bed boiler |
| CN1529089A (en) * | 2003-10-12 | 2004-09-15 | 浙江大学 | High-carbon fly ash fluidized bed aggregated combsution process and apparatus |
| CN1563792A (en) * | 2004-04-06 | 2005-01-12 | 沈阳戴维国际机电设备有限公司 | Method for using solid/liquid coal double fuel for circulation fluidized bed boiler |
| CN101392178A (en) * | 2008-11-03 | 2009-03-25 | 范家峰 | Method for preparing and conveying coal slurry |
-
2012
- 2012-12-13 CN CN201210538319.0A patent/CN103104929B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1219666A (en) * | 1997-12-08 | 1999-06-16 | 机械工业部上海发电设备成套设计研究所 | Box type circulating fluidized bed boiler |
| CN1529089A (en) * | 2003-10-12 | 2004-09-15 | 浙江大学 | High-carbon fly ash fluidized bed aggregated combsution process and apparatus |
| CN1563792A (en) * | 2004-04-06 | 2005-01-12 | 沈阳戴维国际机电设备有限公司 | Method for using solid/liquid coal double fuel for circulation fluidized bed boiler |
| CN101392178A (en) * | 2008-11-03 | 2009-03-25 | 范家峰 | Method for preparing and conveying coal slurry |
Non-Patent Citations (2)
| Title |
|---|
| 奥慧琦等: "循环流化床锅炉煤泥掺烧技术探讨", 《陕西电力》 * |
| 江爱朋等: "煤泥流化床燃烧脱硫试验研究", 《锅炉技术》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103697467A (en) * | 2014-01-09 | 2014-04-02 | 北京兴侨国际工程技术有限公司 | Method for coal slime combustion of circulating fluidized bed boiler |
| CN106090893A (en) * | 2016-06-29 | 2016-11-09 | 无锡锡能锅炉有限公司 | A kind of high performance clean burning method of coal-burning boiler |
| CN109539295A (en) * | 2018-12-06 | 2019-03-29 | 广东清远蒙娜丽莎建陶有限公司 | With baking sulphur intelligence feeding system in a kind of furnace |
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| Publication number | Publication date |
|---|---|
| CN103104929B (en) | 2016-03-30 |
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Denomination of invention: High efficiency and clean combustion method of peat fuel and circulating suspension fluidized boiler Effective date of registration: 20210520 Granted publication date: 20160330 Pledgee: Haier financial factoring (Chongqing) Co.,Ltd. Pledgor: Qingdao Trier Technology Co.,Ltd. Registration number: Y2021370010023 |
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