CN108679594A - Station boiler is adjustable high temperature dust pelletizing system and application process - Google Patents
Station boiler is adjustable high temperature dust pelletizing system and application process Download PDFInfo
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- CN108679594A CN108679594A CN201810345420.1A CN201810345420A CN108679594A CN 108679594 A CN108679594 A CN 108679594A CN 201810345420 A CN201810345420 A CN 201810345420A CN 108679594 A CN108679594 A CN 108679594A
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- level
- economizer
- temperature
- flue gas
- denitrification apparatus
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- 239000000428 dust Substances 0.000 title claims abstract description 42
- 238000005453 pelletization Methods 0.000 title claims abstract description 18
- 238000000034 method Methods 0.000 title claims abstract description 13
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical group [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 55
- 239000003546 flue gas Substances 0.000 claims abstract description 55
- 239000012716 precipitator Substances 0.000 claims abstract description 32
- 230000006378 damage Effects 0.000 claims abstract description 10
- 239000003054 catalyst Substances 0.000 claims abstract description 9
- 239000000779 smoke Substances 0.000 claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 29
- 239000003245 coal Substances 0.000 claims description 9
- 230000000694 effects Effects 0.000 claims description 5
- 230000001276 controlling effect Effects 0.000 claims description 3
- 230000008676 import Effects 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 239000003517 fume Substances 0.000 claims description 2
- 238000013021 overheating Methods 0.000 claims 1
- 230000000903 blocking effect Effects 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract description 4
- 230000002779 inactivation Effects 0.000 abstract description 3
- 238000013517 stratification Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 3
- 235000019504 cigarettes Nutrition 0.000 description 2
- 238000007664 blowing Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
- F22D1/36—Water and air preheating systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22G—SUPERHEATING OF STEAM
- F22G7/00—Steam superheaters characterised by location, arrangement, or disposition
- F22G7/12—Steam superheaters characterised by location, arrangement, or disposition in flues
-
- 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
-
- 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
- F23J2215/10—Nitrogen; Compounds thereof
-
- 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
- F23J2215/10—Nitrogen; Compounds thereof
- F23J2215/101—Nitrous oxide (N2O)
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chimneys And Flues (AREA)
Abstract
The present invention relates to a kind of adjustable high temperature dust pelletizing system of station boiler and application processes, belong to station boiler dedusting control technology field.Currently, station boiler deduster is arranged after air preheater, the easy facilities air preheater and denitrification apparatus to before deduster of dust causes damages.The present invention is arranged in boiler back end ductwork, including low temperature superheater, level-one economizer, hot precipitator, denitrification apparatus, two level economizer and air preheater.It is a feature of the present invention that deduster is arranged in high-temperature flue gas region, the dust in flue gas can be removed before denitrification apparatus, avoid the problem that denitrating catalyst inactivation and blocking, air preheater blocking etc. is caused to be caused by dust stratification；On the other hand arrangement two-stage economizer can effectively control the best specific resistance raising efficiency of dust collection of smoke temperature arrival and can guarantee that denitrification apparatus is in suitable temperature ranges again, improve denitration efficiency.
Description
Technical field
The invention belongs to station boiler dedusting control technology fields, more particularly to a kind of adjustable high temperature of station boiler
Dust pelletizing system and application process.
Background technology
Currently, station boiler deduster is arranged after air preheater, such as application No. is in 201610382902.5
State's patent, and the easy facilities air preheater and denitrification apparatus to before deduster of dust causes damages.To air preheater
It is be easy to cause heat-transfer surface blocking, catalyst inactivation is be easy to cause to denitrating catalyst.In order to reduce these harm, and need to put into big
The slag-blowing equipmemt of amount causes a large amount of resource consumption, and cannot avoid these damages completely.
For electric precipitation, due to the relationship of specific resistance, the flue-gas temperature to entering deduster is needed to control, and it is current
It is limited by exhaust gas temperature, deduster inlet temperature is usually 120 DEG C to 145 DEG C, limits efficiency of dust collection, and temperature is also difficult to
Control.
Invention content
It is an object of the invention to overcome above-mentioned deficiency existing in the prior art, and provide a kind of reasonable in design
Dedusting entrance flue gas temperature is adjusted in station boiler is adjustable high temperature dust pelletizing system and application process, reduce dust to denitrification apparatus,
The harm of air preheater.
Technical solution is used by the present invention solves the above problems：A kind of adjustable high temperature dust pelletizing system of station boiler, packet
Low temperature superheater, air preheater and flue are included, the low temperature superheater and air preheater are arranged on flue, feature
It is, further includes level-one economizer, hot precipitator, denitrification apparatus and two level economizer, the level-one economizer, high-temperature dust removal
Device, denitrification apparatus and two level economizer are successively set on flue, the level-one economizer, hot precipitator, denitrification apparatus and
Two level economizer is between low temperature superheater and air preheater；It is provided with primary effluent mouth and one on the level-one economizer
Grade admission port, is provided with secondary effluent mouth and two level admission port on the two level economizer, the two level economizer passes through connection
Pipe is connect with level-one economizer, and connecting tube flow control valve is provided in the connecting tube.It is reasonable in design, hot precipitator
For carrying out flue gas ash removal at high operating temperatures, position setting can reduce danger of the dust to denitrification apparatus and air preheater
Evil.
Furthermore, the low temperature superheater is arranged in the front of flue, and the air preheater is arranged in flue
Rear portion.
Furthermore, the primary effluent mouth is connect with boiler, and the level-one admission port is connect with water pump.Level-one saves coal
Device water supply exchanges heat, and adjusts the temperature of flue gas, and boiler is sent into the water supply after heat exchange, and the flue gas after heat exchange leads to high-temperature dust removal
Device.
Furthermore, the secondary effluent mouth is connect with level-one economizer, and the two level admission port is connect with water pump.Two
Grade economizer water supply heat exchange, the water supply after heat exchange flow into level-one economizer, the temperature for adjusting flue gas, the cigarette after heat exchange
Gas leads to air preheater.
Furthermore, the level-one economizer and two level economizer are both provided with feed water flow regulating valve.
Furthermore, the level-one economizer is arranged in front of the import of hot precipitator, and the two level economizer is set
It sets at the outlet rear of denitrification apparatus.For controlling the flue-gas temperature for entering hot precipitator, the dust removing effects of flue gas are improved.
A kind of application process of the adjustable high temperature dust pelletizing system of station boiler as described above, which is characterized in that the application
Method is as follows：High-temperature flue gas from burner hearth is introduced into low temperature superheater, level-one economizer, hot precipitator, denitration dress successively
It sets, in two level economizer and air preheater, when high-temperature flue gas is by level-one economizer, hot friendship is carried out with level-one economizer
It changes, makes flue gas control in suitable temperature ranges, be conducive to hot precipitator and the denitrification apparatus operation at level-one economizer rear；Later
Flue gas is passed through hot precipitator, and dust-laden particle is in the temperature range of smaller specific resistance in flue gas at this time, and dust is removed clean；
Flue gas is subsequently passed denitrification apparatus, and catalyst is in the temperature region of greater activity in denitrification apparatus at this time, and in flue gas not
Contain the dust of damage denitrification apparatus again, the working efficiency of denitrification apparatus and service life greatly improve；Flue gas is saved by two level later
The heat of coal device, flue gas is absorbed, and ensures the temperature of air preheater inlet flue gas；Air preheater further absorbs more than flue gas
Heat ensures wind pushing temperature.
Furthermore, when the outlet smoke temperature of low temperature superheater increases, connecting tube flow control valve is turned down so that pass through
The water supply of two level economizer reduces, and is increased by the water supply of level-one economizer, and controlling the inlet flue gas temperature of hot precipitator makes it
It is reduced to suitable temperature；When the outlet smoke temperature of low temperature superheater reduces, big connecting tube flow control valve is opened so that pass through two level
The water supply of economizer increases, and is reduced by the water supply of level-one economizer, and control hot precipitator inlet flue gas temperature makes it be increased to
Suitable temperature.The flue-gas temperature into hot precipitator is adjusted, control smoke temperature reaches suitable specific resistance, and ensures that denitrification apparatus is transported
Trip temperature.
Furthermore, the high-temperature flue gas from burner hearth is introduced by low temperature superheater by air-introduced machine successively, level-one saves coal
In device, hot precipitator, denitrification apparatus, two level economizer and air preheater.
Compared with prior art, the present invention haing the following advantages and effect：The present invention by adjust deduster inlet flue gas temperature,
Efficiency of dust collection is improved, and can guarantee the flue-gas temperature that denitrification apparatus operation needs；The dedusting of flue gas is carried out before denitrification apparatus,
Reduce harm of the dust to catalyst in denitrification apparatus, extends the service life of catalyst；Dust is also reduced to sky simultaneously
Harm, increases the heat exchange efficiency of air preheater, improves the economy of unit operation caused by air preheater heat-transfer surface.
Deduster is arranged in high-temperature flue gas region by the present invention, and the dust in flue gas can be removed before denitrification apparatus,
It avoids the problem that denitrating catalyst inactivation and blocking, air preheater blocking etc. is caused to be caused by dust stratification；On the other hand arrangement two-stage saves
Coal device can effectively control the best specific resistance raising efficiency of dust collection of smoke temperature arrival and can guarantee that denitrification apparatus is in suitable temperature model again
It encloses, improves denitration efficiency.
Description of the drawings
Fig. 1 is the structural schematic diagram of the embodiment of the present invention.
In figure：Low temperature superheater 1, level-one economizer 2, hot precipitator 3, denitrification apparatus 4, two level economizer 5, air are pre-
Hot device 6, primary effluent mouth 7, level-one admission port 8, connecting tube 9, secondary effluent mouth 10, two level admission port 11, flue 12, connecting tube
Flow control valve 13.
Specific implementation mode
The present invention is described in further detail below in conjunction with the accompanying drawings and by embodiment, and following embodiment is to this hair
Bright explanation and the invention is not limited in following embodiments.
Embodiment.
Referring to Fig. 1, the adjustable high temperature dust pelletizing system of station boiler in the present embodiment includes low temperature superheater 1, level-one province coal
Device 2, hot precipitator 3, denitrification apparatus 4, two level economizer 5, air preheater 6 and flue 12.
Low temperature superheater 1, level-one economizer 2, hot precipitator 3, denitrification apparatus 4, two level economizer 5 and air preheater
6 are successively set on flue 12；Wherein, low temperature superheater 1 is arranged in the front of flue 12, and air preheater 6 is arranged in flue
12 rear portion, the dedusting system of level-one economizer 2, hot precipitator 3, denitrification apparatus 4 and two level economizer 5 as temperature-adjustable
System is arranged between low temperature superheater 1 and air preheater 6.Level-one economizer 2 is arranged before the import of hot precipitator 3
Side, two level economizer 5 are arranged at the outlet rear of denitrification apparatus 4.
Primary effluent mouth 7 and level-one admission port 8 are provided on level-one economizer 2, primary effluent mouth 7 is connect with boiler, and one
Grade admission port 8 is connect with water pump；Water supply after heating is delivered to boiler by water outlet 7, admission port 8 connect feed pump supplement to
Water.Secondary effluent mouth 10 and two level admission port 11 are provided on two level economizer 5, secondary effluent mouth 10 connects with level-one economizer 2
It connects, two level admission port 11 is connect with water pump；Two level economizer 5 is connect by connecting tube 9 with level-one economizer 2, is set in connecting tube 9
It is equipped with connecting tube flow control valve 13.Level-one economizer 2 and two level economizer 5 are both provided with feed water flow regulating valve, and level-one saves
Water supply heat exchange can be carried out between coal device 2 and two level economizer 5, control flue-gas temperature.
A kind of application process of the adjustable high temperature dust pelletizing system of station boiler as described above, application process are as follows：By drawing
High-temperature flue gas from burner hearth is introduced low temperature superheater 1, level-one economizer 2, hot precipitator 3, denitrification apparatus by wind turbine successively
4, in two level economizer 5 and air preheater 6, when high-temperature flue gas is by level-one economizer 2, heat is carried out with level-one economizer 2
It exchanges, makes flue gas control in suitable temperature ranges, the hot precipitator 3 and denitrification apparatus 4 for being conducive to 2 rear of level-one economizer are transported
Row；Flue gas is passed through hot precipitator 3 later, and dust-laden particle is in the temperature range of smaller specific resistance, dust quilt in flue gas at this time
Removal is clean；Flue gas is subsequently passed denitrification apparatus 4, and catalyst is in the temperature region of greater activity in denitrification apparatus 4 at this time, and
And no longer containing the dust of damage denitrification apparatus 4 in flue gas, the working efficiency of denitrification apparatus 4 and service life greatly improve；Cigarette later
Gas is absorbed by two level economizer 5, the heat of flue gas, ensures the temperature of 6 inlet flue gas of air preheater；Air preheater 6
Fume afterheat is further absorbed, ensures wind pushing temperature.
When the outlet smoke temperature of low temperature superheater 1 increases, connecting tube flow control valve 13 is turned down so that coal is saved by two level
The water supply of device 5 reduces, and is increased by the water supply of level-one economizer 2, and the inlet flue gas temperature of control hot precipitator 3 makes it be reduced to
Suitable temperature；When the outlet smoke temperature of low temperature superheater 1 reduces, big connecting tube flow control valve 13 is opened so that save by two level
The water supply of coal device 5 increases, and is reduced by the water supply of level-one economizer 2, and control 3 inlet flue gas temperature of hot precipitator makes it be increased to
Suitable temperature.
Although the present invention is disclosed as above with embodiment, it is not limited to protection scope of the present invention, any to be familiar with
The technical staff of this technology changes and retouches made by without departing from the spirit and scope of the invention, should all belong to this hair
Bright protection domain.
Claims (9)
1. a kind of adjustable high temperature dust pelletizing system of station boiler, including low temperature superheater, air preheater and flue, the low temperature mistake
Hot device and air preheater are arranged on flue, which is characterized in that further include level-one economizer, hot precipitator, denitration dress
It sets and is successively set on flue with two level economizer, the level-one economizer, hot precipitator, denitrification apparatus and two level economizer
On, the level-one economizer, hot precipitator, denitrification apparatus and two level economizer be located at low temperature superheater and air preheater it
Between；Primary effluent mouth and level-one admission port are provided on the level-one economizer, being provided with two level on the two level economizer goes out
The mouth of a river and two level admission port, the two level economizer are connect with level-one economizer by connecting tube, are provided in the connecting tube
Connecting tube flow control valve.
2. the adjustable high temperature dust pelletizing system of station boiler according to claim 1, which is characterized in that the low temperature superheater is set
It sets in the front of flue, the air preheater is arranged at the rear portion of flue.
3. the adjustable high temperature dust pelletizing system of station boiler according to claim 1, which is characterized in that the primary effluent mouth with
Boiler connects, and the level-one admission port is connect with water pump.
4. the adjustable high temperature dust pelletizing system of station boiler according to claim 1, which is characterized in that the secondary effluent mouth with
Level-one economizer connects, and the two level admission port is connect with water pump.
5. the adjustable high temperature dust pelletizing system of station boiler according to claim 1, which is characterized in that the level-one economizer and
Two level economizer is both provided with feed water flow regulating valve.
6. the adjustable high temperature dust pelletizing system of station boiler according to claim 1, which is characterized in that the level-one economizer is set
It sets in front of the import of hot precipitator, the two level economizer is arranged at the outlet rear of denitrification apparatus.
7. a kind of application side for high temperature dust pelletizing system that station boiler as described in any one of claim 1-6 claims is adjustable
Method, which is characterized in that the application process is as follows：High-temperature flue gas from burner hearth is introduced into low temperature superheater successively, level-one saves
In coal device, hot precipitator, denitrification apparatus, two level economizer and air preheater, when high-temperature flue gas is by level-one economizer,
Heat exchange is carried out with level-one economizer, makes flue gas control in suitable temperature ranges, is conducive to the high-temperature dust removal at level-one economizer rear
Device and denitrification apparatus operation；Flue gas is passed through hot precipitator later, and dust-laden particle is in the temperature of smaller specific resistance in flue gas at this time
Range is spent, dust is removed clean；Flue gas is subsequently passed denitrification apparatus, and catalyst is in greater activity in denitrification apparatus at this time
Temperature region, and no longer contain the dust of damage denitrification apparatus in flue gas, the working efficiency of denitrification apparatus and service life carry significantly
It is high；Flue gas is absorbed by two level economizer, the heat of flue gas later, ensures the temperature of air preheater inlet flue gas；Air
Preheater further absorbs fume afterheat, ensures wind pushing temperature.
8. the application process of the adjustable high temperature dust pelletizing system of station boiler according to claim 7, which is characterized in that work as low temperature
When the outlet smoke temperature of superheater increases, connecting tube flow control valve is turned down so that reduce by the water supply of two level economizer, and lead to
The water supply for crossing level-one economizer increases, and controlling the inlet flue gas temperature of hot precipitator makes it be reduced to suitable temperature；Work as cryogenic overheating
When the outlet smoke temperature of device reduces, big connecting tube flow control valve is opened so that increase by the water supply of two level economizer, and pass through one
The water supply of grade economizer reduces, and control hot precipitator inlet flue gas temperature makes it be increased to suitable temperature.
9. the application process of the adjustable high temperature dust pelletizing system of station boiler according to claim 7, which is characterized in that by drawing
High-temperature flue gas from burner hearth is introduced low temperature superheater, level-one economizer, hot precipitator, denitrification apparatus, two by wind turbine successively
In grade economizer and air preheater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810345420.1A CN108679594A (en) | 2018-04-17 | 2018-04-17 | Station boiler is adjustable high temperature dust pelletizing system and application process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810345420.1A CN108679594A (en) | 2018-04-17 | 2018-04-17 | Station boiler is adjustable high temperature dust pelletizing system and application process |
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| Publication Number | Publication Date |
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| CN108679594A true CN108679594A (en) | 2018-10-19 |
Family
ID=63799960
Family Applications (1)
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| CN201810345420.1A Pending CN108679594A (en) | 2018-04-17 | 2018-04-17 | Station boiler is adjustable high temperature dust pelletizing system and application process |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109603526A (en) * | 2018-12-29 | 2019-04-12 | 中冶南方都市环保工程技术股份有限公司 | A kind of biomass electric power plant smoke processing system |
| CN109821337A (en) * | 2019-04-03 | 2019-05-31 | 南京师范大学 | A kind of hot gas Integral purifier preventing boiler tail dew point corrosion |
| CN109945222A (en) * | 2019-02-26 | 2019-06-28 | 黄震 | A kind of biomass boiler energy-saving and emission-reduction minimum discharge technique |
| CN111911899A (en) * | 2020-07-10 | 2020-11-10 | 国家电投集团电站运营技术（北京）有限公司 | Boiler with function of preventing ammonium bisulfate of low-temperature economizer from being blocked |
| CN113324238A (en) * | 2021-05-27 | 2021-08-31 | 北京巴布科克·威尔科克斯有限公司 | Composite hot water recirculation system and method for full-load denitration of supercritical power station boiler |
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