CN108050532B - A kind of pulverized-coal fired boiler Slagging preventing control method based on particle condensation - Google Patents
A kind of pulverized-coal fired boiler Slagging preventing control method based on particle condensation Download PDFInfo
- Publication number
- CN108050532B CN108050532B CN201711229074.2A CN201711229074A CN108050532B CN 108050532 B CN108050532 B CN 108050532B CN 201711229074 A CN201711229074 A CN 201711229074A CN 108050532 B CN108050532 B CN 108050532B
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- Prior art keywords
- boiler
- particle
- furnace
- nozzle
- slagging
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000002245 particle Substances 0.000 title claims abstract description 80
- 238000000034 method Methods 0.000 title claims abstract description 26
- 239000003245 coal Substances 0.000 title claims abstract description 20
- 238000009833 condensation Methods 0.000 title claims abstract description 13
- 230000005494 condensation Effects 0.000 title claims abstract description 13
- 239000000463 material Substances 0.000 claims abstract description 28
- 239000000428 dust Substances 0.000 claims abstract description 13
- 238000010438 heat treatment Methods 0.000 claims abstract description 12
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000003546 flue gas Substances 0.000 claims abstract description 11
- 239000002893 slag Substances 0.000 claims abstract description 7
- 239000004411 aluminium Substances 0.000 claims abstract description 4
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 4
- 239000010703 silicon Substances 0.000 claims abstract description 4
- 239000007789 gas Substances 0.000 claims description 11
- 239000007921 spray Substances 0.000 claims description 11
- 239000008187 granular material Substances 0.000 claims description 4
- 239000000843 powder Substances 0.000 claims description 4
- 238000000926 separation method Methods 0.000 claims description 4
- 239000000112 cooling gas Substances 0.000 claims description 2
- 238000011109 contamination Methods 0.000 abstract description 13
- 239000000446 fuel Substances 0.000 abstract description 7
- 229910052728 basic metal Inorganic materials 0.000 abstract description 6
- 150000003818 basic metals Chemical class 0.000 abstract description 6
- 229910052783 alkali metal Inorganic materials 0.000 abstract description 3
- 150000001340 alkali metals Chemical class 0.000 abstract description 3
- 239000002994 raw material Substances 0.000 abstract description 3
- 238000005507 spraying Methods 0.000 abstract description 2
- 238000004033 diameter control Methods 0.000 abstract 1
- 230000002265 prevention Effects 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 4
- 239000000654 additive Substances 0.000 description 3
- 239000004927 clay Substances 0.000 description 3
- 239000003513 alkali Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000003203 everyday effect Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- WURBVZBTWMNKQT-UHFFFAOYSA-N 1-(4-chlorophenoxy)-3,3-dimethyl-1-(1,2,4-triazol-1-yl)butan-2-one Chemical compound C1=NC=NN1C(C(=O)C(C)(C)C)OC1=CC=C(Cl)C=C1 WURBVZBTWMNKQT-UHFFFAOYSA-N 0.000 description 1
- 239000002028 Biomass Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 229910052622 kaolinite Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- -1 quasi- eastern coal Chemical class 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
- F23J15/022—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J3/00—Removing solid residues from passages or chambers beyond the fire, e.g. from flues by soot blowers
- F23J3/02—Cleaning furnace tubes; Cleaning flues or chimneys
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J2215/00—Preventing emissions
- F23J2215/60—Heavy metals; Compounds thereof
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Abstract
A kind of pulverized-coal fired boiler Slagging preventing control method based on particle condensation, this method be will be enriched in element silicon, the material particles of aluminium element are transported in boiler furnace by conveyance conduit, and sprayed into particle in the region that boiler furnace top flue-gas temperature is 900~1200 DEG C by nozzle, preferably at roof of the furnace furnace arch, furnace nose or at the serious convection heating surface of Slagging.At 5~200 μm, temperature is lower than 600 DEG C for grain diameter control.The present invention is by spraying into cryogenic particles into boiler furnace, vapour of an alkali metal in flue gas is set to be condensate in the mode in cryogenic particles, it can reach effectively control and use the contamination of boiler caused by fuel containing high basic metal, clogging problems, and it also may be derived from the flying dust or boiler bottom slag of boiler dust remover collection using raw material, therefore at low cost, it is practical.
Description
Technical field
The present invention relates to a kind of pulverized-coal fired boiler Slagging preventing control method more particularly to a kind of coal dusts based on particle condensation
Boiler Slagging preventing control method, belongs to boiler plant technical field.
Background technique
In the prior art, for the pulverized-coal fired boiler of fuel containing high basic metal (such as quasi- eastern coal, stalk biomass fuel),
Occur the problems such as water-cooling wall slagging, high-temperature pipe burn into convection heating surface contamination in actual moving process, it can be to unit equipment
Safe operation has significant damage.Largely practice have shown that, there is serious be stained with during burning high basic metal fuel in boiler
The problems such as dirty, slagging mainly since the alkalies and alkaline earth ratio in fuel increases, use at present high basic metal stain,
Slagging prevention and control measure, which specifically includes that mix, burns high-ash coal, or additives such as clay etc. is added into boiler, but no matter what uses
Kind technology, boiler operatiopn cost will increase dramatically.Therefore, be badly in need of studying a kind of novel low-cost stain, slagging Control Technology.
Summary of the invention
In order to which contamination, slagging prevention and control cost is effectively reduced, while effectively the contamination of control boiler, clogging problems, the present invention mention
An a kind of pulverized-coal fired boiler Slagging preventing control method based on particle condensation out.
Technical scheme is as follows:
A kind of pulverized-coal fired boiler Slagging preventing control method based on particle condensation, it is characterised in that the method includes as follows
Step:
1) material particles that will be enriched in one or both of element silicon and aluminium element are stored in particle storehouse, utilize blower
The air of introducing carries material particles and enters conveyance conduit；
2) material particles are transported in boiler furnace by conveyance conduit, and in boiler furnace top flue-gas temperature
To spray into burner hearth by nozzle in 900~1200 DEG C of regions.
Preferably, the partial size of the material particles is 5~200 μm；Material particles temperature is controlled in room temperature~600 DEG C range
It is interior.
Preferably, the material particles being stored in particle storehouse control particle mass flow rate by screw(-type) feeder, recycle
The air that blower introduces carries the particle that screw(-type) feeder is fed and enters conveyance conduit.
Preferably, the air source of the blower is in the air preheater for being arranged in boiler back end ductwork.
Preferably, the nozzle is arranged at upper furnace furnace arch, furnace nose or before the serious convection heating surface of Slagging, and
The injection direction of nozzle is consistent with flue gas flow direction.
Technical characteristic of the invention also resides in: the number of the nozzle is calculated according to furnace cross-sectional area at nozzle, often
3m2At least one nozzle need to be arranged in furnace cross-sectional area, need to be evenly arranged in the multiple nozzles of burner hearth same position.
Preferably, the material particles are derived from the flying dust or boiler bottom slag of boiler dust remover collection；From boiler dust remover
The flying dust or boiler bottom slag of collection, initially enter material bin, carry out the separation of thickness powder, grain by separator after broken crusher machine
Coarse granule of the diameter greater than 200 μm returns to crusher, and fine grained enters particle storehouse by separator；The air that blower introduces is divided into two
Road enters crusher by first flow valve as cooling gas all the way, the particle that another way carrying screw(-type) feeder is fed into
Enter conveyance conduit, gas flow is controlled by second flow valve, the gas for carrying particle sprays into burner hearth by nozzle.
The present invention has the following advantages that and the technical effect of high-lighting: 1. the present invention is by spraying into low temperature into boiler furnace
Particle makes vapour of an alkali metal in flue gas be condensate in the mode in cryogenic particles, reaches effectively control and uses the combustion of high basic metal content
The purpose for expecting boiler contamination, slagging prevention and control is boiler waste using raw material, practical；2. for contamination, slagging easily occurs
Convection heating surface, targetedly arrange nozzle, can reduce the straying quatity of particle, reduce the influence to Boiler Economical Operation；
3. the present invention passes through to boiler reality compared to mixing the high-ash coal of burning or the Control Technologies such as the additives such as clay being added into boiler
Border operation contamination, the understanding of slagging situation arrange nozzle for contamination, the serious heating surface of slagging, spray into cryogenic particles, can be big
It is big to reduce contamination, slagging prevention and control cost, good economy performance；4. small to boiler improvement, everyday devices maintenance and replacement are convenient, operation at
This is low.
Detailed description of the invention
Fig. 1 is the principle and flow diagram of the first embodiment of the method for the present invention.
Fig. 2 is the principle and flow diagram of second of embodiment of the method for the present invention.
In figure: 1- blower；2- particle storehouse；3- screw(-type) feeder；4- flow valve；5- boiler furnace；6- nozzle；7- convection current by
Hot face；8- crusher；9- separator；10- material bin.
Specific embodiment
The principle of the present invention and preferred forms are further illustrated with reference to the accompanying drawing.
As shown in Figure 1, a kind of pulverized-coal fired boiler Slagging preventing control method based on particle condensation provided by the invention, work
Process is as follows: will be enriched in the material particles of one or both of element silicon and aluminium element, such as boiler bottom slag, flying dust, kaolinite
Soil etc. is stored in particle storehouse 2, and the air introduced using blower 1 is carried material particles and enters conveyance conduit；Then pass through conveying
The material particles are transported in boiler furnace by pipeline, and in the area that boiler furnace top flue-gas temperature is 900~1200 DEG C
Burner hearth is sprayed by nozzle 6 in domain.
When grain diameter is in 5~200 μm in particle storehouse 2, according to 1 process of attached drawing: particle storehouse 2 and 3 phase of screw(-type) feeder
Even, the air that blower 1 introduces carries the particle that screw(-type) feeder 3 is fed and enters conveyance conduit, controls gas stream by flow valve 4
Amount, the gas for carrying particle spray into burner hearth by nozzle 6；Particle can be sprayed into burner hearth in a position or multiple positions, it is each
The gas flow of position is controlled by flow valve；The nozzle quantity of boiler same position need to be evenly arranged.A large amount of experiment
Studies have shown that nozzle and convection heating surface distance need to be greater than 50cm, and nozzle quantity presses section of burner hearth in nozzle setting up procedure
Product is calculated, every 3m2At least one nozzle need to be arranged in furnace cross-sectional area；During boiler operatiopn, particle need to continue to spray into, spray
Mouth gas flow rate need to be consistent with flue gas flow rate at this, and deviation need to be lower than 20%.
Nozzle be preferably disposed at upper furnace furnace arch, furnace nose or Slagging serious convection heating surface 7 before, and nozzle
Injection direction is consistent with flue gas flow direction.The serious convection heating surface of Slagging refers mainly to pendant superheater, high temperature superheater, low
Warm superheater, high temperature reheater etc..Material particles temperature should control within the scope of room temperature~600 DEG C.The air of the blower 1 can
Also can use other gas sources from the air preheater for being arranged in boiler back end ductwork.
When grain diameter is greater than 200 μm in particle storehouse 2, according to 2 process of attached drawing: material bin 10 is connected with crusher 8, is crushed
Machine 8 is connected with separator 9, and broken particle carries out the separation of thickness powder by separator 9, and partial size is greater than 200 μm of coarse granule
Crusher 8 is returned to, fine grained enters particle storehouse 2 by separator 9, and particle storehouse 2 is connected with screw(-type) feeder 3, gives by spiral
Material machine 3 controls particle mass flow rate, and the outlet of blower 1 is divided into two-way, and a-road-through inflow-rate of water turbine valve is connected with crusher 8, and another way is taken
The particle fed with screw(-type) feeder 3 controls gas flow by entering conveyance conduit, by flow valve, carries the gas of particle
Burner hearth is sprayed by nozzle 6.
It, should be in material bin 10 if material particles are derived from the high-temperature materials such as flying dust or the boiler bottom slag of boiler dust remover collection
In be cooled to room temperature~600 DEG C, specific cooling temperature can determine that temperature exist according to crusher 8 or 3 operating temperature of screw(-type) feeder
Material particles in room temperature~600 DEG C enter crusher 8 in the case where the air-flow of blower 1 carries and are crushed to particle；It is broken
Particle carries out the separation of thickness powder by separator 9, and partial size is separated and is delivered to by separator 9 in 5~200 μm of fine graineds
It is stored in particle storehouse 2, coarse granule of the partial size higher than 200 μm returns to crusher 8 and be crushed.Fine grained in particle storehouse 2
Enter conveying pipe by screw(-type) feeder 3, and particle mass flow rate is controlled by screw(-type) feeder 3；Screw(-type) feeder 3 is fed
Particle under the carrying of 1 air-flow of blower by nozzle 6 spray into boiler furnace.
The present invention provides a kind of pulverized-coal fired boiler Slagging preventing control methods based on particle condensation, by boiler furnace
Interior penetrating cryogenic particles make vapour of an alkali metal in flue gas be condensate in the mode in cryogenic particles, reach effectively control use it is high-alkali
The purpose of the contamination of tenor fuel boiler, slagging prevention and control is boiler waste using raw material, practical；For easily occurring
It stains, the convection heating surface of slagging, targetedly arranges nozzle, the straying quatity of particle can be reduced, reduce to boiler operatiopn economy
The influence of property；Pass through compared to mixing to burn high-ash coal or Control Technologies, the present invention such as the additives such as clay are added into boiler
Boiler actual motion is stain, the understanding of slagging situation, arranges nozzle for contamination, the serious heating surface of slagging, spray into low temperature
Particle can substantially reduce contamination, slagging prevention and control cost, good economy performance；It is small to boiler improvement, everyday devices maintenance and replacement side
Just, operating cost is low.
The present invention is suitable for using contamination, the slagging prevention and control of the pulverized-coal fired boiler of the fuel containing high basic metal.
Claims (5)
1. a kind of pulverized-coal fired boiler Slagging preventing control method based on particle condensation, it is characterised in that the method includes walking as follows
It is rapid:
1) material particles that will be enriched in one or both of element silicon and aluminium element are stored in particle storehouse (2), utilize blower
(1) the air carrying material particles introduced enter conveyance conduit；The partial size of the material particles is 5~200 μm；Material particles temperature
Degree control is within the scope of room temperature~600 DEG C；
2) material particles are transported in boiler furnace by conveyance conduit, and are in boiler furnace top flue-gas temperature
Burner hearth is sprayed by nozzle (6) in 900~1200 DEG C of region；
The nozzle setting is at upper furnace furnace arch, furnace nose or before the serious convection heating surface of Slagging (7), and the spray of nozzle
It is consistent with flue gas flow direction to penetrate direction；The number of the nozzle (6) is calculated according to furnace cross-sectional area at nozzle, every 3m2Burner hearth
At least one nozzle need to be arranged in sectional area, need to be evenly arranged in the multiple nozzles of burner hearth same position；In nozzle setting up procedure, spray
Mouth and convection heating surface distance 50cm.
2. a kind of pulverized-coal fired boiler Slagging preventing control method based on particle condensation according to claim 1, feature exist
In the material particles being stored in particle storehouse (2) control particle mass flow rate by screw(-type) feeder (3), and blower is recycled to draw
The air entered carries the particle that screw(-type) feeder (3) are fed and enters conveyance conduit.
3. a kind of pulverized-coal fired boiler Slagging preventing control method based on particle condensation according to claim 1 or 2, feature
Be: the air source of the blower (1) is in the air preheater for being arranged in boiler back end ductwork.
4. a kind of pulverized-coal fired boiler Slagging preventing control method based on particle condensation according to claim 1, feature exist
In: the material particles are derived from the flying dust or boiler bottom slag of boiler dust remover collection.
5. a kind of pulverized-coal fired boiler Slagging preventing control method based on particle condensation according to claim 4, feature exist
In: the flying dust or boiler bottom slag collected from boiler dust remover initially enter material bin (10), lead to after crusher (8) are broken
It crosses separator (9) and carries out the separation of thickness powder, coarse granule of the partial size greater than 200 μm returns to crusher (8), and fine grained passes through separator
(9) enter particle storehouse (2)；The air that blower (1) introduces is divided into two-way, passes through first flow valve (4a) as cooling gas all the way
Into crusher (8), another way carries the particle that screw(-type) feeder (3) are fed and enters conveyance conduit, passes through second flow valve
(4b) controls gas flow, and the gas for carrying particle sprays into burner hearth by nozzle (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711229074.2A CN108050532B (en) | 2017-11-29 | 2017-11-29 | A kind of pulverized-coal fired boiler Slagging preventing control method based on particle condensation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711229074.2A CN108050532B (en) | 2017-11-29 | 2017-11-29 | A kind of pulverized-coal fired boiler Slagging preventing control method based on particle condensation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108050532A CN108050532A (en) | 2018-05-18 |
| CN108050532B true CN108050532B (en) | 2019-10-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201711229074.2A Active CN108050532B (en) | 2017-11-29 | 2017-11-29 | A kind of pulverized-coal fired boiler Slagging preventing control method based on particle condensation |
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| CN (1) | CN108050532B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109882831B (en) * | 2019-03-21 | 2020-05-19 | 上海电力学院 | Method for preventing and controlling coking of heating surface of coal-fired power plant boiler based on six-temperature method |
| CN110145752A (en) * | 2019-05-28 | 2019-08-20 | 河北远征环保科技有限公司 | The removing of thermal power plant's large coal-fired boiler exhaust gas dust, recovery experiment device and method |
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| KR20050038056A (en) * | 2003-10-21 | 2005-04-27 | 안계홍 | A manure manufacture method forest tree ash use and forest tree waste destructor |
| CN102829467A (en) * | 2012-09-25 | 2012-12-19 | 中国东方电气集团有限公司 | Ash residue re-circulating method and system for preventing boiler from being contaminated |
| CN102829468A (en) * | 2012-09-25 | 2012-12-19 | 中国东方电气集团有限公司 | Coal ash and ash combined re-circulating system for preventing boiler from being polluted |
| CN103615714A (en) * | 2013-11-20 | 2014-03-05 | 东方电气集团东方锅炉股份有限公司 | Method and system for preventing boiler heating surface from being contaminated through circulation of wearable materials |
| CN106196115A (en) * | 2016-09-09 | 2016-12-07 | 西安交通大学 | A kind of controlled erosion system and method for cleaning boiler heating surface |
-
2017
- 2017-11-29 CN CN201711229074.2A patent/CN108050532B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20050038056A (en) * | 2003-10-21 | 2005-04-27 | 안계홍 | A manure manufacture method forest tree ash use and forest tree waste destructor |
| CN102829467A (en) * | 2012-09-25 | 2012-12-19 | 中国东方电气集团有限公司 | Ash residue re-circulating method and system for preventing boiler from being contaminated |
| CN102829468A (en) * | 2012-09-25 | 2012-12-19 | 中国东方电气集团有限公司 | Coal ash and ash combined re-circulating system for preventing boiler from being polluted |
| CN103615714A (en) * | 2013-11-20 | 2014-03-05 | 东方电气集团东方锅炉股份有限公司 | Method and system for preventing boiler heating surface from being contaminated through circulation of wearable materials |
| CN106196115A (en) * | 2016-09-09 | 2016-12-07 | 西安交通大学 | A kind of controlled erosion system and method for cleaning boiler heating surface |
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| CN108050532A (en) | 2018-05-18 |
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