CN207831397U - High-temperature area dust pelletizing system in a kind of boiler back end ductwork - Google Patents
High-temperature area dust pelletizing system in a kind of boiler back end ductwork Download PDFInfo
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- CN207831397U CN207831397U CN201820179314.6U CN201820179314U CN207831397U CN 207831397 U CN207831397 U CN 207831397U CN 201820179314 U CN201820179314 U CN 201820179314U CN 207831397 U CN207831397 U CN 207831397U
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- air
- boiler
- air preheater
- economizer
- preheater
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/30—Technologies for a more efficient combustion or heat usage
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Abstract
The utility model discloses high-temperature area dust pelletizing systems in a kind of boiler back end ductwork comprising boiler further includes denitrification apparatus, air preheater, hot precipitator, air-introduced machine, air blower, steam air heater and economizer.Advantage is：The utility model at boiler nozzle by being arranged hot precipitator, so that the flue gas of boiler nozzle discharge is after hot precipitator removes most dusts, when passing through economizer, denitrification apparatus, air preheater, to the abrasion very little of economizer, the service life of economizer can be extended, booster is reduced, the number that boiler failure is stopped transport is reduced；The blockage problem for reducing denitrification apparatus and air preheater improves the catalytic performance of denitrating catalyst, improves denitration reaction rate；In addition, the heat exchange property of air preheater also can be improved, and then the exit gas temperature of air preheater is reduced, improve boiler efficiency, saved operation expense, ensure the safe and stable operation of boiler.
Description
Technical field：
The utility model belongs to high-temperature area dedusting in flue gas ash removal technical field more particularly to a kind of boiler back end ductwork
System.
Background technology：
Coal dust will produce a large amount of flue gases after Boiler Furnace chamber inner combustion, containing more in the flue gas ejected from boiler
Dust, generally in 10~60g/Nm3In range.According to the current environment protection emission policy requirements of country, flue gas discharges in coal-burning power plant
Middle dust content is no more than 10mg/Nm3, so coal-burning power plant is both provided with deduster in flue gas system, to meet country
Environment protection emission policy requirements.
Currently, domestic coal-burning power plant is all often the flue that deduster is arranged between air preheater and air-introduced machine
Region, the high-temperature flue gas high containing dust concentration that boiler furnace comes out flow into back-end ductwork, exchange heat and drop by heating surfaces at different levels
Then temperature passes through boiler economizer, wear coal economizer heat exchanging tube, denitrification apparatus is passed through, in denitrification apparatus catalyst surface
It can be gradually accumulated certain thickness dust, also can not all be blown off using soot blower；Then flow through air preheater and cold air
Heat exchange, cold air is heated, while reducing flue-gas temperature, the dust in flue gas can be slowly on the heat exchanger plates in air preheater
Accumulation, similarly can not all be blown off using soot blower, then enters back into deduster and carry out removing dust, house outlet contains
The flue gas of micro dust, then be further processed into desulfurizer after air-introduced machine boosts, air is then discharged by chimney.By
It is arranged behind economizer, denitrification apparatus and air preheater in deduster, before entering deduster, dust concentration is contained in flue gas
It is very high, can all have an impact to the boiler tail economizer, denitrification apparatus, air preheater that are flowed through：1, the mill of boiler economizer
Damage is serious, is easy booster, boiler breakdowns is caused to be stopped transport；2, denitrating catalyst is blocked, the catalytic performance of catalyst is reduced, influences to take off
Nitre reacts；3, air preheater is blocked, the heat exchange of air preheater is influenced, the flue-gas temperature of air preheater outlet can increase,
The hot blast temperature of outlet can reduce, and can reduce boiler efficiency, influence the economic benefit of power plant.
Utility model content：
The purpose of this utility model is to provide high-temperature area dust pelletizing systems in a kind of safe and reliable boiler back end ductwork.
The utility model is implemented by following technical solution：
High-temperature area dust pelletizing system in a kind of boiler back end ductwork comprising boiler further includes that denitrification apparatus, air are pre-
Two outlet flues of hot device, hot precipitator, air-introduced machine, air blower, steam air heater and economizer, the boiler pass through pipe respectively
Road is connected with the hot precipitator, the economizer and the denitrification apparatus in turn, the outlet of the denitrification apparatus with it is described
The gas inlet of air preheater connects, the air inlet that the exhanst gas outlet of the air preheater passes through pipeline and the air-introduced machine
Connection, the air outlet of two air-introduced machines are connect with the import of desulfurizer；
Two air inlets of the boiler are connect by pipeline with the air outlet of the air preheater, and the air is pre-
The air inlet of hot device is connected with the steam air heater and the air blower in turn by pipeline；
Pipeline between two air blowers and the steam air heater is connected to by blower export air duct liaison tube, two
Pipeline between the air preheater air outlet and the inlet air of boiler mouth exports hot-flow flue liaison tube by air preheater
Connection.
Further, the denitrification apparatus is Benitration reactor.
The advantages of the utility model：
The utility model at boiler nozzle by being arranged hot precipitator so that the flue gas warp of boiler nozzle discharge
After crossing the most dusts of hot precipitator removing, when passing through economizer, denitrification apparatus, air preheater, to economizer
Very little is worn, the service life of economizer can be extended, reduces booster, reduces the number that boiler failure is stopped transport；Reduce denitrification apparatus and sky
The blockage problem of air preheater improves the catalytic performance of denitrating catalyst, improves denitration reaction rate；In addition, air also can be improved
The heat exchange property of preheater, so reduce air preheater exit gas temperature, improve boiler efficiency, save operation and maintenance at
This, ensures the safe and stable operation of boiler.
Description of the drawings：
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, other drawings may also be obtained based on these drawings.
Fig. 1 is the positive structure schematic of the present embodiment；
In figure：Boiler 1, denitrification apparatus 2, air preheater 3, hot precipitator 4, air-introduced machine 5, air blower 6, steam air heater 7,
Economizer 8, air preheater outlet hot-flow flue liaison tube 9, blower export air duct liaison tube 10.
Specific implementation mode：
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
The every other embodiment obtained, shall fall within the protection scope of the present invention.
Embodiment 1：
High-temperature area dust pelletizing system in a kind of boiler back end ductwork as shown in Figure 1 comprising boiler 1 further includes taking off
Nitre device 2, air preheater 3, hot precipitator 4, air-introduced machine 5, air blower 6, steam air heater 7 and economizer 8, the two of boiler 1
A outlet flue is connected with hot precipitator 4, economizer 8 and denitrification apparatus 2, the outlet of denitrification apparatus 2 in turn by pipeline respectively
It is connect with the gas inlet of air preheater 3, the exhanst gas outlet of air preheater 3 is connected by the air inlet of pipeline and air-introduced machine 5
It connects, the air outlet of two air-introduced machines 5 is connect with the import of desulfurizer；
Two air inlets of boiler 1 are connect by pipeline with the air outlet of air preheater 3, air preheater 3 into
Air port is connected with steam air heater 7 and air blower 6 in turn by pipeline；
Pipeline between two air blowers 6 and steam air heater 7 is connected to by blower export air duct liaison tube 10, two air
Pipeline between 3 air outlet of preheater and 1 air inlet of boiler exports hot-flow flue liaison tube 9 by air preheater and is connected to.
Denitrification apparatus 2 is Benitration reactor.
Operation principle：
Dust concentration is higher in the flue gas of 1 outlet flue of boiler discharge, can be by flue gas 99% after hot precipitator 4
Above dust removing, the flue gas containing micro dust pass through economizer 8, can absorb the heat of high-temperature flue gas, reduce cigarette
The exhaust gas temperature of gas plays the role of saving the energy；Flue gas passes through denitrification apparatus 2 later, can remove the nitrogen oxides in flue gas
It removes, is of great significance for preventing the pollution of the environment；When flowing through air preheater 3, the temperature of flue gas can be further decreased；Later
Desulfurizer is flowed into after being boosted by air-introduced machine 5 again to be further processed.It is micro- due to only containing in the flue gas after hot precipitator 4
The dust of amount can reduce the abrasion to economizer 8, extend the service life of economizer 8, reduce booster, reduce 1 failure of boiler and stop transport
Number；Also the blockage problem that denitrification apparatus 2 and air preheater 3 can be reduced, improves the catalytic performance of denitrating catalyst, in turn
Improve denitration reaction rate；Moreover it is possible to improve the heat exchange property of air preheater 3, the exiting flue gas temperature of air preheater 3 is reduced
Degree improves 1 efficiency of boiler, saves operation expense, ensures the safe and stable operation of boiler 1.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Within the spirit and principle of utility model, any modification, equivalent replacement, improvement and so on should be included in the utility model
Protection domain within.
Claims (2)
1. high-temperature area dust pelletizing system in a kind of boiler back end ductwork comprising boiler, which is characterized in that it further includes denitration dress
It sets, air preheater, hot precipitator, air-introduced machine, air blower, steam air heater and economizer, two outlet flues of the boiler
The hot precipitator, the economizer and the denitrification apparatus are connected in turn by pipeline respectively, the denitrification apparatus
Outlet is connect with the gas inlet of the air preheater, and the exhanst gas outlet of the air preheater passes through pipeline and the air inducing
The air inlet of machine connects, and the air outlet of two air-introduced machines is connect with the import of desulfurizer；
Two air inlets of the boiler are connect by pipeline with the air outlet of the air preheater, the air preheater
Air inlet the steam air heater and the air blower are connected in turn by pipeline；
Pipeline between two air blowers and the steam air heater is connected to by blower export air duct liaison tube, described in two
Pipeline between air preheater air outlet and the inlet air of boiler mouth exports hot-flow flue liaison tube by air preheater and is connected to.
2. high-temperature area dust pelletizing system in a kind of boiler back end ductwork according to claim 1, which is characterized in that described de-
Nitre device is Benitration reactor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820179314.6U CN207831397U (en) | 2018-02-01 | 2018-02-01 | High-temperature area dust pelletizing system in a kind of boiler back end ductwork |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820179314.6U CN207831397U (en) | 2018-02-01 | 2018-02-01 | High-temperature area dust pelletizing system in a kind of boiler back end ductwork |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207831397U true CN207831397U (en) | 2018-09-07 |
Family
ID=63396325
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820179314.6U Active CN207831397U (en) | 2018-02-01 | 2018-02-01 | High-temperature area dust pelletizing system in a kind of boiler back end ductwork |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207831397U (en) |
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2018
- 2018-02-01 CN CN201820179314.6U patent/CN207831397U/en active Active
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