CN211913349U - System for adopt and face stove hot-blast heating and realize full load denitration - Google Patents
System for adopt and face stove hot-blast heating and realize full load denitration Download PDFInfo
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- CN211913349U CN211913349U CN202020341593.9U CN202020341593U CN211913349U CN 211913349 U CN211913349 U CN 211913349U CN 202020341593 U CN202020341593 U CN 202020341593U CN 211913349 U CN211913349 U CN 211913349U
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- hot air
- air
- pipeline
- hot
- air preheater
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 41
- 238000002955 isolation Methods 0.000 claims description 27
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 5
- 239000003054 catalyst Substances 0.000 abstract description 5
- 239000003546 flue gas Substances 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract description 2
- 239000000779 smoke Substances 0.000 description 5
- 238000004064 recycling Methods 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 1
- BIGPRXCJEDHCLP-UHFFFAOYSA-N ammonium bisulfate Chemical compound [NH4+].OS([O-])(=O)=O BIGPRXCJEDHCLP-UHFFFAOYSA-N 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
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Classifications
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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
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Abstract
Adopt and face a stove hot-blast heating and realize full load denitration's system. The existing full-load denitration technology mostly adopts a low-temperature catalyst, a grading economizer, a No. 0 high-pressure heater, a flue gas bypass and the like. The utility model discloses a include: two air preheater hot air recirculation system (13), communicate through hot-blast female pipe (1) between two air preheater hot air recirculation system's hot air heating pipeline (9), air preheater hot air recirculation system includes air preheater (7), SCR reactor (10) and air preheater hot air recirculation fan (3), install the income wind gap department at air preheater hot air recirculation fan in outlet pipeline (6) of air preheater, install the air outlet department at air preheater hot air recirculation fan in inlet pipeline (8), hot air heating pipeline one end and outlet pipe intercommunication, the other end communicates with SCR reactor's entry flue (11). The utility model is used for adopt to face system that stove hot-blast heating realized full load denitration.
Description
The technical field is as follows:
the utility model relates to an adopt and face system that stove hot-blast heating realized full load denitration.
Background art:
in recent years, with the rapid development of new energy, the thermal power deep peak regulation demand is increasing day by day, and under a low-load working condition, the smoke temperature at the SCR inlet does not meet the use requirement of a denitration catalyst, so that the service life of the catalyst is reduced; the ammonia spraying is excessive, so that the ammonium bisulfate is deposited in an air preheater. In the prior art, low-load denitration is realized by increasing the smoke temperature by adopting technologies such as a low-temperature catalyst, a grading economizer, a No. 0 high-pressure heater and a smoke bypass.
The utility model has the following contents:
the utility model aims at solving present low temperature catalyst cost expensive, hierarchical economizer and 0 # height add to reform transform complicacy, and the investment is high, adds the problem that the flue gas bypass can influence boiler efficiency and reduce, provides a system that the purpose that reaches low smoke and temperature commissioning SCR adopts and faces stove hot-blast heating and realize full load denitration.
The above purpose is realized by the following technical scheme:
a system for realizing full-load denitration by adopting hot air heating of a furnace, which comprises the following components: the hot air heating pipelines of the two air preheater hot air recirculation systems are communicated through a hot air main pipe;
the air preheater hot air recirculation system comprises an air preheater, an SCR reactor and an air preheater hot air recirculation fan, wherein an outlet pipeline of the air preheater is arranged at an air inlet of the air preheater hot air recirculation fan, an inlet pipeline is arranged at an air outlet of the air preheater hot air recirculation fan, one end of a hot air heating pipeline is communicated with the outlet pipeline, and the other end of the hot air heating pipeline is communicated with an inlet flue of the SCR reactor.
The system for realizing full-load denitration by adopting hot air heating of the furnace, wherein a hot air heating pipeline to an SCR inlet flue isolation door and an air preheater hot air recirculation fan to a hot air heating pipeline isolation door are arranged on the hot air heating pipeline, a hot air recirculation fan outlet isolation door is arranged on an outlet pipeline, and a hot air recirculation fan inlet isolation door is arranged on an inlet pipeline.
Has the advantages that:
1. the utility model discloses utilize and to reform transform air preheater hot air recirculation system as the basis, heat to facing the stove cigarette temperature, realize the purpose of full load denitration.
2. The utility model discloses reform transform succinctly, investment cost is low, and the hot-blast recirculated air volume is lower (about 10 t/h), and is less to boiler efficiency and fan power consumption influence.
3. The utility model discloses the hot-blast 350 that is greater than in air preheater export for the heating faces stove afterbody flue gas and more than 320 ℃, reaches the purpose of low smoke temperature commissioning SCR.
4. The utility model discloses on the unit that air preheater hot air recycling reformed transform, draw forth a way pipe to facing stove denitration SCR entry flue from the hot air recirculation fan export.
Description of the drawings:
FIG. 1 is a schematic structural diagram of the present invention;
in the figure: 1. a hot air main pipe; 2. an air preheater hot air recirculation fan is arranged at the hot air heating pipeline isolation door; 3. the air preheater hot air recirculation fan; 4. an inlet isolation door of the hot air recirculation fan; 5. an outlet isolation door of the hot air recirculation fan; 6. an outlet conduit; 7. an air preheater; 8. an inlet duct; 9. a hot air heating pipeline; 10. an SCR reactor; 11. an inlet flue; 12. a hot air heating pipeline is connected to an SCR inlet flue isolation door; 13. air preheater hot air recirculation system.
The specific implementation mode is as follows:
example 1:
a system for realizing full-load denitration by adopting hot air heating of a furnace, which comprises the following components: the hot air heating pipelines 9 of the two air preheater hot air recirculation systems are communicated through a hot air main pipe 1;
the air preheater hot air recirculation system comprises an air preheater 7, an SCR reactor 10 and an air preheater hot air recirculation fan 3, wherein an outlet pipeline 6 of the air preheater is arranged at an air inlet of the air preheater hot air recirculation fan, an inlet pipeline 8 is arranged at an air outlet of the air preheater hot air recirculation fan, one end of a hot air heating pipeline is communicated with the outlet pipeline, and the other end of the hot air heating pipeline is communicated with an inlet flue 11 of the SCR reactor.
Example 2:
according to embodiment 1, the system for realizing full-load denitration by using hot air heating of the furnace, the hot air heating pipeline is provided with a hot air heating pipeline to SCR inlet flue isolation door 12 and an air preheater hot air recirculation fan to hot air heating pipeline isolation door 2, the outlet pipeline is provided with a hot air recirculation fan outlet isolation door 5, and the inlet pipeline is provided with a hot air recirculation fan inlet isolation door 4.
As shown in the figure, the left side of the two air preheater hot air recycling systems is a furnace No. 1, and the right side of the two air preheater hot air recycling systems is a furnace No. 2;
starting a boiler:
in the initial stage of boiler ignition, the No. 2 furnace hot air circulating fan is opened to the hot air pipeline isolation door, the original outlet isolation door and the hot air to No. 2 furnace SCR inlet flue isolation door are closed, the No. 1 furnace hot air circulating fan is opened to the hot air pipeline isolation door and the No. 1 furnace hot air circulating fan outlet isolation door for rapidly improving the initial hot air temperature of boiler starting, realizing early powder feeding and improving the heating and boosting rate.
Before the unit is combined with the power grid, a No. 2 furnace hot air circulating fan and a hot air pipeline isolating door are kept opened, an original outlet isolating door and a hot air to No. 2 furnace SCR inlet flue isolating door are kept closed, a No. 1 furnace hot air circulating fan and a hot air pipeline isolating door are closed, an No. 1 furnace hot air circulating fan outlet isolating door is closed, a hot air pipeline and a No. 1 furnace SCR inlet flue isolating door are opened and used for heating tail flue gas, the air quantity of No. 1 furnace primary air and secondary air is reduced during commissioning, a quicker heating effect is achieved, and finally full-load denitration is achieved.
Single unit peak regulation:
before the peak regulation of No. 1 unit begins, open No. 2 stove hot-blast circulating fan to hot-blast main isolation gate, close its former export isolation gate and hot-blast to No. 2 stove SCR entry flue isolation gate, close No. 1 stove hot-blast circulating fan to hot-blast main isolation gate, close No. 1 stove hot-blast circulating fan export isolation gate, open hot-blast main to No. 1 stove SCR entry flue isolation gate, be used for heating afterbody flue gas, reduce the amount of wind of No. 1 stove primary air and overgrate air during the commissioning, in order to reach very fast heating effect, finally realize the full load denitration.
Claims (2)
1. A system for realizing full-load denitration by adopting hot air heating of a furnace, which comprises the following components: two air preheater hot air recirculation system, characterized by: the hot air heating pipelines of the two air preheater hot air recirculation systems are communicated through a hot air main pipe;
the air preheater hot air recirculation system comprises an air preheater, an SCR reactor and an air preheater hot air recirculation fan, wherein an outlet pipeline of the air preheater is arranged at an air inlet of the air preheater hot air recirculation fan, an inlet pipeline is arranged at an air outlet of the air preheater hot air recirculation fan, one end of a hot air heating pipeline is communicated with the outlet pipeline, and the other end of the hot air heating pipeline is communicated with an inlet flue of the SCR reactor.
2. The system for realizing full-load denitration by using hot air heating of the furnace as claimed in claim 1, wherein: the hot air heating pipeline on install hot air heating pipeline to SCR entry flue isolation gate and air preheater heated air recirculation fan to hot air heating pipeline isolation gate, the export pipeline on install heated air recirculation fan export isolation gate, the entry pipeline on install heated air recirculation fan entry isolation gate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020341593.9U CN211913349U (en) | 2020-03-18 | 2020-03-18 | System for adopt and face stove hot-blast heating and realize full load denitration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020341593.9U CN211913349U (en) | 2020-03-18 | 2020-03-18 | System for adopt and face stove hot-blast heating and realize full load denitration |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211913349U true CN211913349U (en) | 2020-11-13 |
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ID=73355761
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020341593.9U Expired - Fee Related CN211913349U (en) | 2020-03-18 | 2020-03-18 | System for adopt and face stove hot-blast heating and realize full load denitration |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211913349U (en) |
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2020
- 2020-03-18 CN CN202020341593.9U patent/CN211913349U/en not_active Expired - Fee Related
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20201113 |
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| CF01 | Termination of patent right due to non-payment of annual fee |