CN206904943U - Ensure the device of SCR system bringing normally into operation during a kind of depth peak regulation - Google Patents
Ensure the device of SCR system bringing normally into operation during a kind of depth peak regulation Download PDFInfo
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- CN206904943U CN206904943U CN201720724664.1U CN201720724664U CN206904943U CN 206904943 U CN206904943 U CN 206904943U CN 201720724664 U CN201720724664 U CN 201720724664U CN 206904943 U CN206904943 U CN 206904943U
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- China
- Prior art keywords
- peak regulation
- depth peak
- ensure
- operation during
- flue gas
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 41
- 239000003546 flue gas Substances 0.000 claims abstract description 41
- 239000007789 gas Substances 0.000 claims abstract description 26
- 239000003245 coal Substances 0.000 claims abstract description 25
- 238000004891 communication Methods 0.000 claims abstract description 3
- 238000013461 design Methods 0.000 claims description 2
- 230000008092 positive effect Effects 0.000 abstract description 3
- 235000019504 cigarettes Nutrition 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000002817 coal dust Substances 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000000038 chest Anatomy 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 208000011580 syndromic disease Diseases 0.000 description 1
Abstract
The utility model discloses the device for ensureing SCR system bringing normally into operation during a kind of depth peak regulation, including burner hearth, burner hearth is provided with burner, the entrance that burner hearth passes through the first high-temperature flue gas pipeline communication SCR denitration system, the top of the SCR denitration system is provided with economizer, and bottom is provided with air preheater；The first gas baffle of adjustable aperture is provided with the first high-temperature flue gas pipeline；The top of the air preheater is also connected by flue with coal pulverizer, and the output of the coal pulverizer is connected with the burner.Present apparatus simple system, and positive effect.
Description
Technical field
Heat power plant boiler field is the utility model is related to, more particularly to is ensureing SCR system just during a kind of depth peak regulation
The device often to put into operation.
Background technology
Power network receives the proportion of generation of electricity by new energy amount (wind energy, solar energy) increasingly to increase, and this requires increasing fire
Power Plant participates in depth peak regulation.Depth peak regulation generally refers to fired power generating unit load and is down to below 40%BMCR, while needs to meet
The requirement up to standard of unit safety, environment protection emission.With the reduction of unit load, SCR denitration system entrance flue gas temperature declines
To less than 300 DEG C, now SCR system is unable to bringing normally into operation, and emission of NOx of boiler will be exceeded, and power plant not yet carries out on a large scale at present
Under depth peak regulation SCR how the research of normal work.In addition, after the bypass of economizer water side is installed additional in power plant, part feedwater is obstructed
Cross economizer and directly import economizer exit pipeline, it reduce economizer caloric receptivity, and then improve SCR inlet flue-gas temperature,
Ensure denitrating system normal operation, but so improve exhaust gas temperature, ensure environment protection standard equivalent to economy is sacrificed,
How to improve boiler economics on the premise of environment protection standard is ensured is problem to be solved in the utility model.
Being put into operation under underload after the bypass of economizer water side, SCR inlet flue-gas temperature can improve 20~50 DEG C, it ensure that
SCR system bringing normally into operation, but exhaust gas temperature is improved to 120~140 DEG C from 90~110 DEG C accordingly under underload, boiler
The thermal efficiency reduces by 1.5%~2.5%, and underload lower hearth fuel combustion efficiency declines, and the raising of exhaust gas temperature more exacerbates
Boiler heat loss.
Utility model content
The purpose of this utility model is exactly to solve the above problems, there is provided ensures SCR system during a kind of depth peak regulation
The device of bringing normally into operation, simple system, and positive effect.
To achieve these goals, the utility model adopts the following technical scheme that：
Ensure that the device of SCR system bringing normally into operation, including burner hearth, burner hearth are provided with burner, stove during a kind of depth peak regulation
Thorax is provided with economizer by the entrance of the first high-temperature flue gas pipeline communication SCR denitration system, the top of the SCR denitration system,
Bottom is provided with air preheater；The first gas baffle of adjustable aperture is provided with the first high-temperature flue gas pipeline.
When boiler participates in depth peak regulation, if SCR denitration system flue-gas temperature is less than design temperature, the first gas baffle
Setting aperture is opened, SCR denitration system inlet flue gas temperature is adjusted by the high-temperature flue gas amount of introducing.
The top of the air preheater connects with the burner.
The top of the air preheater is connected by flue with coal pulverizer, the output of the coal pulverizer and the combustion
Burner connects.
The top of the air preheater is connected by the second high-temperature flue gas pipeline with coal pulverizer.
The top of the air preheater is also connected by First air hot air duct with coal pulverizer.
The second high-temperature flue gas pipeline is provided with booster fan.
The second gas baffle is additionally provided with the second high-temperature flue gas pipeline.
The aperture of second gas baffle can adjust.
When boiler participates in depth peak regulation, booster fan and the second gas baffle are opened, part height is passed through into coal pulverizer
Warm flue gas.
The beneficial effects of the utility model are：
1st, the utility model enters burner upper pyrometer flue gas in burner hearth by pipeline introducing economizer exit SCR system
Mouthful, there is high-temperature flue gas baffle plate centre, and when boiler participates in depth peak regulation, if SCR flue-gas temperatures are less than 305 DEG C, gas baffle is beaten
Certain aperture is opened, SCR inlet cigarette temperature is adjusted by the high-temperature flue gas amount of introducing so that SCR inlet cigarette temperature maintains 305~340
DEG C, it is ensured that SCR bringing normally into operation, so as to ensure boiler participate in depth peak regulation when environmental protection index it is up to standard.
2nd, present apparatus simple system, and positive effect.
3rd, a part of high-temperature flue gas of air preheater entrance is directed directly to each coal pulverizer by pipeline and entered by the utility model
Mouthful, dried jointly with First air and carry coal dust.Because oxygen content is low in flue gas, oxygen concentration in coal pulverizer atmosphere is caused to reduce,
Coal dust explosion difficulty increases, and pulverizer outlet temperature can properly increase to 95 DEG C~105 DEG C and not influence pulverized coal preparation system security.
Heat into coal pulverizer increases, and exhaust gas temperature declines, and the unit entirety thermal efficiency improves, on the premise of unit safety is not influenceed
Reach the purpose of energy-conservation.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model；
Wherein, 1. burner hearth, 2. burners, 3. economizers, 4.SCR denitrating systems, 5. air preheaters, 6. coal pulverizers, 7.
First air hot air duct, 8. second high-temperature flue gas pipelines, 9. second gas baffles, 10. booster fans, the outlet of 11. coal pulverizers are sent
Powder pipeline, 12. first high-temperature flue gas pipelines, 13. first gas baffles.
Embodiment：
The utility model is described further with embodiment below in conjunction with the accompanying drawings：
As shown in figure 1, ensure the device of SCR system bringing normally into operation during a kind of depth peak regulation, including burner hearth 1, set on burner hearth 1
There is burner 2, burner hearth 1 connects the entrance of SCR denitration system 4, the SCR denitration system 4 by the first high-temperature flue gas pipeline 12
Top be provided with economizer 3, bottom is provided with air preheater 5；Adjustable aperture is provided with the first high-temperature flue gas pipeline 12
The first gas baffle 13；The top of the air preheater 5 is also connected by flue with coal pulverizer, the coal pulverizer
Output is connected with the burner.
The top of the air preheater is connected by the second high-temperature flue gas pipeline 8 with coal pulverizer 6, while also by once
Wind-heat wind pipeline 7 is connected with coal pulverizer 6.The second high-temperature flue gas pipeline 8 is provided with booster fan 10 and adjustable aperture
Second gas baffle 9.
When boiler participates in depth peak regulation, boiler load is down to 40% at full capacity below, when SCR inlet cigarette temperature is less than 305
DEG C when, open the first gas baffle 13, high-temperature flue gas from burner hearth 1 pass through the first high-temperature flue gas pipeline 12 enter SCR denitration system 4
Entrance, mixed with flue gas after economizer 3, by adjust the aperture of the first gas baffle 13 can maintain SCR inlet cigarette temperature 305~
Between 340 DEG C, SCR system bringing normally into operation during so as to ensure that depth peak regulation.
When boiler participates in depth peak regulation, the bypass of economizer water side puts into operation, and SCR system inlet flue gas temperature improves 20~50 DEG C,
The gas baffle 9 of booster fan 10 and second is now opened, part high-temperature flue gas is passed through into coal pulverizer 6, because exhaust gas volumn is reduced,
The heat exchange efficiency of air preheater 5 is basically unchanged, and exhaust gas temperature declines therewith, and explosion-proof capabilities add after being passed through flue gas in coal pulverizer 6
By force, coal pulverizer 6 exports wind-warm syndrome and raises 10~20 DEG C than safety value under normal circumstances, effectively reduces exhaust gas temperature, improves
Boiler efficiency during depth peak regulation.
It is not new to this practicality although above-mentioned specific embodiment of the present utility model is described with reference to accompanying drawing
The limitation of type protection domain, one of ordinary skill in the art should be understood that on the basis of the technical solution of the utility model, ability
Field technique personnel need not pay the various modifications that creative work can make or deformation still in protection model of the present utility model
Within enclosing.
Claims (10)
1. ensure the device of SCR system bringing normally into operation during a kind of depth peak regulation, it is characterized in that, including burner hearth, burner hearth, which is provided with, to be fired
Burner, by the entrance of the first high-temperature flue gas pipeline communication SCR denitration system, the top of the SCR denitration system is provided with burner hearth
Economizer, bottom are provided with air preheater；The first gas baffle of adjustable aperture is provided with the first high-temperature flue gas pipeline.
2. ensure the device of SCR system bringing normally into operation during a kind of depth peak regulation as claimed in claim 1, it is characterized in that, work as pot
When stove participates in depth peak regulation, if SCR denitration system flue-gas temperature is less than design temperature, the first gas baffle is opened setting and opened
Degree, SCR denitration system inlet flue gas temperature is adjusted by the high-temperature flue gas amount of introducing.
3. ensure the device of SCR system bringing normally into operation during a kind of depth peak regulation as claimed in claim 1, it is characterized in that, it is described
The top of air preheater connects with the burner.
4. ensure the device of SCR system bringing normally into operation during a kind of depth peak regulation as claimed in claim 3, it is characterized in that, it is described
The top of air preheater is connected by flue with coal pulverizer, and the output of the coal pulverizer connects with the burner.
5. ensure the device of SCR system bringing normally into operation during a kind of depth peak regulation as claimed in claim 4, it is characterized in that, it is described
The top of air preheater is connected by the second high-temperature flue gas pipeline with coal pulverizer.
6. ensure the device of SCR system bringing normally into operation during a kind of depth peak regulation as claimed in claim 4, it is characterized in that, it is described
The top of air preheater is also connected by First air hot air duct with coal pulverizer.
7. ensure the device of SCR system bringing normally into operation during a kind of depth peak regulation as claimed in claim 5, it is characterized in that, it is described
Second high-temperature flue gas pipeline is provided with booster fan.
8. ensure the device of SCR system bringing normally into operation during a kind of depth peak regulation as claimed in claim 7, it is characterized in that, it is described
The second gas baffle is additionally provided with second high-temperature flue gas pipeline.
9. ensure the device of SCR system bringing normally into operation during a kind of depth peak regulation as claimed in claim 8, it is characterized in that, it is described
The aperture of second gas baffle can adjust.
10. ensure the device of SCR system bringing normally into operation during a kind of depth peak regulation as claimed in claim 9, it is characterized in that, work as pot
When stove participates in depth peak regulation, booster fan and the second gas baffle are opened, part high-temperature flue gas is passed through into coal pulverizer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720724664.1U CN206904943U (en) | 2017-06-21 | 2017-06-21 | Ensure the device of SCR system bringing normally into operation during a kind of depth peak regulation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720724664.1U CN206904943U (en) | 2017-06-21 | 2017-06-21 | Ensure the device of SCR system bringing normally into operation during a kind of depth peak regulation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206904943U true CN206904943U (en) | 2018-01-19 |
Family
ID=61285262
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720724664.1U Active CN206904943U (en) | 2017-06-21 | 2017-06-21 | Ensure the device of SCR system bringing normally into operation during a kind of depth peak regulation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206904943U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113357661A (en) * | 2021-07-07 | 2021-09-07 | 西安热工研究院有限公司 | Flue gas bypass system for pi-shaped boiler participating in peak shaving |
| CN113578513A (en) * | 2021-07-02 | 2021-11-02 | 国网山东省电力公司电力科学研究院 | Control method and system for outlet temperature of coal mill of direct-fired pulverizing system |
-
2017
- 2017-06-21 CN CN201720724664.1U patent/CN206904943U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113578513A (en) * | 2021-07-02 | 2021-11-02 | 国网山东省电力公司电力科学研究院 | Control method and system for outlet temperature of coal mill of direct-fired pulverizing system |
| CN113357661A (en) * | 2021-07-07 | 2021-09-07 | 西安热工研究院有限公司 | Flue gas bypass system for pi-shaped boiler participating in peak shaving |
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