CN205065771U - Directly blow high -efficient blast proof stove cigarette of formula coal pulverizer and mix fever device - Google Patents
Directly blow high -efficient blast proof stove cigarette of formula coal pulverizer and mix fever device Download PDFInfo
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- CN205065771U CN205065771U CN201520807136.3U CN201520807136U CN205065771U CN 205065771 U CN205065771 U CN 205065771U CN 201520807136 U CN201520807136 U CN 201520807136U CN 205065771 U CN205065771 U CN 205065771U
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Abstract
The utility model discloses a directly blow high -efficient blast proof stove cigarette of formula coal pulverizer and mix fever device, including boiler both sides flue gas line, draught fan, booster fan, electronic picture peg door, regulation door, primary air fan and coal pulverizer, its characterized in that: boiler both sides flue gas line's exit end insert electrostatic precipitator respectively, the back exhanst gas outlet that removes dust inserts draught fan and booster fan through the flue respectively, the output pipeline of draught fan and booster fan divides equally for two small transfer lines, and a small transfer line all inserts the desulfurizing tower, and another small transfer line is respectively through electronic picture peg door and regulation door and the total union coupling of " Y " shape, " Y " shape house steward two outputs insert the primary air fan respectively, its outlet pipe inserts the coal pulverizer through the oxygen scale respectively. This directly blow high -efficient blast proof stove cigarette of formula coal pulverizer and mix fever device not only can improve combustion efficiency, can avoid the pollution of environment moreover, reduce powder process unit consumption and nitrogen oxide, prevent pulverizer explosion, safe in utilization.
Description
Technical field
The utility model relates to a kind of improvement of direct-blowing type coal mill pulverized coal preparation system, specifically a kind of stove cigarette mingled burning installation of direct-blowing type coal mill efficient explosionproof.Be applicable to access boiler of power plant high-volatile bituminous coal unit pulverized-coal system.
Background technology
In current teaching of senior high school, school encourages student to take out a little time as much as possible and does some production practice investigation, and touch society practice, pinpoints the problems.High-volatile bituminous coal unit pulverized-coal system is the visual plant of power station boiler pulverizing system, by coal pulverizer, coal is worn into coal dust, then is blown in boiler-burner.At present, grind the double-inlet and double-outlet steel ball coal mill of high-volatile bituminous coal for prevention explosion of Coal Pulverizing System, usually take to reduce the passive method of pulverizer outlet temperature (65 DEG C), this kind of method, be in operation, drying capacity of pulverizer is not only caused to reduce, cause burner powder delivery temperature (at about 60 DEG C) on the low side simultaneously, retarded by combustion, after-flame condition are deteriorated, flame kernel moves, fly ash combustible material raises, and larger fluctuation appears in back-end ductwork carbon monoxide content simultaneously, and, high temperature corrosion aggravation serious in subregion reducing atmosphere; In addition, after flame kernel moves, not only cause heating surface overtemperature of tube wall, desuperheating water of superheater amount large, cause the coking of furnace outlet heating surface to aggravate simultaneously.For improving coal mill ability, once had the design installing high-temperature flue gas at double inlet and outlet coal mill entrance additional, this kind of design needs to install a high pressure-temperature blower fan additional, and operational reliability is poor, and operation energy consumption is high; And now fire high-volatile bituminous coal double-inlet and double-outlet steel ball coal mill mix black furnace cigarette transformation also there is no relevant report.
Known by retrieving, have not yet to see and can not only improve efficiency of combustion, and the report pollution to environment can avoided, reduce unit power consumption of coal pulverizing and nitrogen oxide, prevent the straight-blowing double-inlet and double-outlet steel ball coal mill stove cigarette mingled burning installation of pulverizer explosion, use safety.
Summary of the invention
The purpose of this utility model is to provide one to improve efficiency of combustion, and the stove cigarette mingled burning installation can avoided the pollution to environment, reduce unit power consumption of coal pulverizing and nitrogen oxide, prevent the direct-blowing type coal mill efficient explosionproof of pulverizer explosion, use safety.
In order to reach above object, the technical scheme that the utility model adopts is: the stove cigarette mingled burning installation of this direct-blowing type coal mill efficient explosionproof, comprise boiler side flue gas pipeline, boiler opposite side flue gas pipeline, air-introduced machine, booster fan, electronic insertion plate door, adjustment doors, primary air fan, air preheater and coal pulverizer, boiler side flue gas pipeline is connected with boiler smoke tail pipe with the arrival end of boiler opposite side flue gas pipeline, coal pulverizer installs 5, the outlet of each coal pulverizer is equipped with mixes burn-back pipe, mix burn-back pipe and connect burner hearth by corresponding burner, the import of each coal pulverizer is communicated with same female pipe, female pipe accesses two primary air fans, the entrance of every platform primary air fan is equipped with air inlet duct, the communicating pipe of two primary air fans and female pipe is equipped with air preheater, it is characterized in that: the port of export of described boiler side flue gas pipeline and boiler opposite side flue gas pipeline accesses electric cleaner respectively, after the dedusting of two electric cleaners, exhanst gas outlet is respectively by flue access air-introduced machine and booster fan, described air-introduced machine and the output channel of booster fan are divided into two branch pipe(tube)s, a branch pipe(tube) access desulfurizing tower, and another branch pipe(tube) is connected with " Y " shape house steward with adjustment doors respectively by electronic insertion plate door, the outlet of two described primary air fans is equipped with oxygen meter, described " Y " shape house steward two outputs access in the air inlet duct of two primary air fans respectively.
The utility model is also implemented by following measure: the port of export of two described primary air fans was connected by communicating pipe, and communicating pipe is provided with First air outlet communicating door.
Described air inlet duct is set with by central tube and outer tube and forms, and the inner chamber of central tube is air input passage, is ring smoke input channel between the outer wall of central tube and the inwall of outer tube.
Flue gas communicating door is provided with between the flue of two described electric cleaners.
Described electric cleaner, air-introduced machine, booster fan, electronic insertion plate door, adjustment doors, primary air fan, coal pulverizer, desulfurizing tower, air preheater and oxygen meter are prior art, therefore seldom state.
On probation through installing, owing to carry out mixing burning black furnace cigarette in coal pulverizer after, pulverizer outlet temperature can be increased to more than 100 DEG C, fly ash combustible material obviously reduces, because primary air ratio reduces, secondary air flow increases, combustion position obviously improves, carbonomonoxide concentration high and fluctuation, high temperature corrosion, fly ash combustible material is high, spray water flux is large, unit power consumption of coal pulverizing is high, the problem such as tube wall temperature overtemperature and furnace outlet coking is all obviously alleviated, simultaneously because wind powder oxygen content reduces, furnace outlet nitrogen oxide can reduce 100mg/m on existing basis
3left and right; Mix cold blast rate because of coal pulverizer in addition to reduce, increased by the hot blast of air preheater, consider air preheater entrance wind-warm syndrome and improve impact, exhaust gas temperature will decrease.Because of the temperature rise of air preheater entrance First air, air preheater generation low-temp radiating and the blocking of hydrogen sulfate ammonia can be prevented to a certain extent.
The beneficial effects of the utility model are: the stove cigarette mingled burning installation of this direct-blowing type coal mill efficient explosionproof, because the flue gas of air-introduced machine and booster fan being drawn is divided into again two branch roads, and control flow by electronic insertion plate door and adjustment doors, one tunnel enters desulfurizing tower, and a road enters primary air fan, thus achieves desulfurization, prevent the pollution to environment, meanwhile, control flue gas flow, regulate the flue gas oxygen content of coal pulverizer inlet hot blast; Because the efferent duct at primary air fan is provided with oxygen meter, the delivery outlet of primary air fan connects air inlet duct, so control oxygen content timely, reduces the temperature and oxygen content that enter coal pulverizer flue gas; So, can not only efficiency of combustion be improved, and can avoid the pollution to environment, reduce unit power consumption of coal pulverizing and nitrogen oxide, prevent pulverizer explosion, use safety.
Accompanying drawing explanation
Fig. 1 is Standard schematic front view of the present utility model.
Fig. 2 is that the axis of structural gap input pipe of the present utility model analyses and observe enlarged diagram.
In figure: 1, boiler side flue gas pipeline; 2, boiler opposite side flue gas pipeline; 3, air-introduced machine; 4, booster fan; 5, electronic insertion plate door; 6, adjustment doors; 7, primary air fan; 8, coal pulverizer; 9, flue gas communicating door; 10, electric cleaner; 11, flue; 12, output channel; 13, " Y " shape house steward; 14, desulfurizing tower; 15, oxygen meter; 16, burn-back pipe is mixed; 17, air inlet duct; 171, central tube; 172, outer tube; 18, air preheater; 19, First air outlet communicating door; 20, female pipe; 21, communicating pipe.
Detailed description of the invention
The utility model is made with reference to Fig. 1, Fig. 2.The stove cigarette mingled burning installation of this direct-blowing type coal mill efficient explosionproof, comprise boiler side flue gas pipeline 1, boiler opposite side flue gas pipeline 2, air-introduced machine 3, booster fan 4, electronic insertion plate door 5, adjustment doors 6, primary air fan 7, air preheater 18 and coal pulverizer 8, boiler side flue gas pipeline 1 is connected with boiler smoke tail pipe with the arrival end of boiler opposite side flue gas pipeline 2, coal pulverizer 8 installs 5, the outlet of each coal pulverizer 8 is equipped with mixes burn-back pipe 16, mix burn-back pipe 16 and connect burner hearth by corresponding burner, the import of each coal pulverizer 8 is communicated with same female pipe 20, female pipe 20 accesses two primary air fans 7, the entrance of every platform primary air fan 7 is equipped with air inlet duct 17, two primary air fans 7 with the communicating pipe of female pipe 20 are equipped with air preheater 18, it is characterized in that: described boiler side flue gas pipeline 1 and the port of export of boiler opposite side flue gas pipeline 2 access electric cleaner 10 respectively, after the dedusting of two electric cleaners 10, exhanst gas outlet accesses air-introduced machine 3 and booster fan 4 respectively by flue 11, by air-introduced machine 3 and booster fan 4, flue gas after dedusting is exported, described air-introduced machine 3 and the output channel 12 of booster fan 4 are divided into two branch pipe(tube)s, one branch pipe(tube) access desulfurizing tower 14, by the flue dust desulfurization that desulfurizing tower 14 will export, to prevent the pollution to atmospheric environment, another branch pipe(tube) is connected with " Y " shape house steward 13 with adjustment doors 6 respectively by electronic insertion plate door 5, because the pressure in the output channel 12 from air-introduced machine 3 and booster fan 4 is 2000Mpa, so, need the black furnace cigarette flue gas flow flowed into by the regulable control of electronic insertion plate door 5 and adjustment doors 6 in primary air fan 7, the outlet conduits flue gas oxygen content of primary air fan 7 is made to be down to less than 16%, the outlet of two described primary air fans 7 is equipped with oxygen meter 15, tests display oxygen content by oxygen meter 15, then according to the oxygen content data that oxygen meter 15 shows, control and regulation door 6, ensures to make the oxygen content entering coal pulverizer 8 be down to less than 16%, described " Y " shape house steward 13 two outputs access in the air inlet duct 17 of two primary air fans 7 respectively, the flue gas inputted by " Y " shape house steward 13 is mixed with air, enter drying, preheating, pulverized coal preparation system again, like this, because the oxygen content in flue gas only has 3-6%, the oxygen content in air is 21%, after mixing with air, oxygen content in mist is down to 16%, can prevent the blast of coal pulverizer 8.
As improvement of the present utility model: the port of export of two described primary air fans 7 was connected by communicating pipe 21, communicating pipe 21 is provided with First air outlet communicating door 19, under normal circumstances, First air outlet communicating door 19 is in opening, two primary air fans 7 work simultaneously, if when needing a primary air fan 7 to stop one-sided operation, First air can be exported communicating door 19 and close.
Described air inlet duct 17 is set with by central tube 171 and outer tube 172 and forms, and the inner chamber of central tube 171 is air input passage, is ring smoke input channel between the outer wall of central tube 171 and the inwall of outer tube 172.
Be provided with flue gas communicating door 9 between the flue 11 of two described electric cleaners 10, when flue gas communicating door 9 is opened, the flue 11 of two electric cleaners 10 can mixed running.
Described electric cleaner 10, air-introduced machine 3, booster fan 4, electronic insertion plate door 5, adjustment doors 6, primary air fan 7, coal pulverizer 8, desulfurizing tower 14, air preheater 18 and oxygen meter 15 are prior art, therefore seldom state.
Claims (4)
1. the stove cigarette mingled burning installation of direct-blowing type coal mill efficient explosionproof, comprise boiler side flue gas pipeline (1), boiler opposite side flue gas pipeline (2), air-introduced machine (3), booster fan (4), electronic insertion plate door (5), adjustment doors (6), primary air fan (7), air preheater (18) and coal pulverizer (8), coal pulverizer (8) installs 5, the outlet of each coal pulverizer (8) is equipped with mixes burn-back pipe (16), the import of each coal pulverizer (8) is managed (20) with same mother and is communicated with, upper access two primary air fans (7) of mother's pipe (20), the entrance of every platform primary air fan (7) is equipped with air inlet duct (17), two primary air fans (7) with female communicating pipe of managing (20) are equipped with air preheater (18), it is characterized in that: described boiler side flue gas pipeline (1) and the port of export of boiler opposite side flue gas pipeline (2) access electric cleaner (10) respectively, after the dedusting of two electric cleaners (10), exhanst gas outlet is respectively by flue (11) access air-introduced machine (3) and booster fan (4), described air-introduced machine (3) and the output channel (12) of booster fan (4) are divided into two branch pipe(tube)s, branch pipe(tube) access desulfurizing tower (14), and another branch pipe(tube) is connected with " Y " shape house steward (13) with adjustment doors (6) respectively by electronic insertion plate door (5), the outlet of two described primary air fans (7) is equipped with oxygen meter (15), described " Y " shape house steward (13) two outputs access in the air inlet duct (17) of two primary air fans (7) respectively.
2. the stove cigarette mingled burning installation of direct-blowing type coal mill efficient explosionproof according to claim 1, it is characterized in that: the port of export of two described primary air fans (7) was connected by communicating pipe (21), and communicating pipe (21) is provided with First air outlet communicating door (19).
3. the stove cigarette mingled burning installation of direct-blowing type coal mill efficient explosionproof according to claim 1, it is characterized in that: described air inlet duct (17) is set with by central tube (171) and outer tube (172) and forms, the inner chamber of central tube (171) is air input passage, is ring smoke input channel between the outer wall of central tube (171) and the inwall of outer tube (172).
4. the stove cigarette mingled burning installation of direct-blowing type coal mill efficient explosionproof according to claim 1, is characterized in that: be provided with flue gas communicating door (9) between the flue (11) of two described electric cleaners (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520807136.3U CN205065771U (en) | 2015-10-19 | 2015-10-19 | Directly blow high -efficient blast proof stove cigarette of formula coal pulverizer and mix fever device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520807136.3U CN205065771U (en) | 2015-10-19 | 2015-10-19 | Directly blow high -efficient blast proof stove cigarette of formula coal pulverizer and mix fever device |
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| CN205065771U true CN205065771U (en) | 2016-03-02 |
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| CN201520807136.3U Expired - Fee Related CN205065771U (en) | 2015-10-19 | 2015-10-19 | Directly blow high -efficient blast proof stove cigarette of formula coal pulverizer and mix fever device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110328039A (en) * | 2019-03-11 | 2019-10-15 | 华电电力科学研究院有限公司 | A kind of direct-firing medium-speed pulverizer mixes furnace cigarette explosion-protection equipment and its working method |
| CN111271723A (en) * | 2018-12-05 | 2020-06-12 | 武汉金如水科技发展有限公司 | Technology for raising reheat steam temperature and reducing nitrogen oxide by using furnace smoke recirculation to produce powder |
| CN112555884A (en) * | 2020-12-10 | 2021-03-26 | 西安西热锅炉环保工程有限公司 | System and method for controlling W flame boiler double-inlet double-outlet steel ball-milling bituminous coal blending combustion proportion |
-
2015
- 2015-10-19 CN CN201520807136.3U patent/CN205065771U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111271723A (en) * | 2018-12-05 | 2020-06-12 | 武汉金如水科技发展有限公司 | Technology for raising reheat steam temperature and reducing nitrogen oxide by using furnace smoke recirculation to produce powder |
| CN110328039A (en) * | 2019-03-11 | 2019-10-15 | 华电电力科学研究院有限公司 | A kind of direct-firing medium-speed pulverizer mixes furnace cigarette explosion-protection equipment and its working method |
| CN110328039B (en) * | 2019-03-11 | 2023-09-15 | 华电电力科学研究院有限公司 | Furnace smoke doping explosion-proof device of direct-blowing medium-speed coal mill and working method of furnace smoke doping explosion-proof device |
| CN112555884A (en) * | 2020-12-10 | 2021-03-26 | 西安西热锅炉环保工程有限公司 | System and method for controlling W flame boiler double-inlet double-outlet steel ball-milling bituminous coal blending combustion proportion |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160302 Termination date: 20161019 |
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| CF01 | Termination of patent right due to non-payment of annual fee |