CN105423322B - The system that a kind of underload improves denitration cigarette temperature - Google Patents
The system that a kind of underload improves denitration cigarette temperature Download PDFInfo
- Publication number
- CN105423322B CN105423322B CN201510945667.3A CN201510945667A CN105423322B CN 105423322 B CN105423322 B CN 105423322B CN 201510945667 A CN201510945667 A CN 201510945667A CN 105423322 B CN105423322 B CN 105423322B
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- Prior art keywords
- flue
- boiler
- vertical
- bypass
- denitration
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Classifications
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- 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
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- 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
- F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Treating Waste Gases (AREA)
- Chimneys And Flues (AREA)
Abstract
The present invention relates to the system that a kind of underload improves Denitration in Boiler device portal flue-gas temperature, including two vertical flues of boiler tail, it is both provided with being provided with damper on bypass flue, two bypass flue connections, bypass flue on two vertical flues of boiler tail.Relative to prior art, the bypass flue that the present invention is provided directly with connecting in two vertical flues of boiler tail, so wherein a boiler when opening heater stage or underrun, bypass flue can be opened, the part high-temperature flue gas in the two vertical flues of boiler tail normally run is set to enter in the vertical flue of underrun boiler tail, improve the entrance flue gas temperature of denitrification apparatus, make the NOx emission in flue gas up to standard, the system operatio is flexible, the operating condition of power plant's Various Complex can be met, to reach in any unit underload or can ensure that denitration entrance flue gas temperature meets requirement when opening stove.
Description
Technical field
The present invention relates to the system that a kind of underload improves Denitration in Boiler device portal flue-gas temperature.
Background technology
Now with the continuous improvement of national requirements for environmental protection, people increasingly pay attention to the NOx emission in flue gas, national ring
Guarantor portion was on June 19th, 2015《On thermal power plant's SCR denitration system, NOx emission bid has under boiler at low load running situation
Pass problem is write a letter in reply》（Ring letter [2015] 143）It is middle to propose：" thermal power plant is in any operating load, it is necessary to qualified discharge.
Discharged nitrous oxides concentration should regard as discharge beyond standards higher than emission limit requirement caused by denitrating system can not be run, and
It is imposed punishment in accordance with the law.", according to requirements above at present in the urgent need to one kind can quickly improve boiler at low load denitrification apparatus entrance
The system of flue-gas temperature.
The content of the invention
The technical problem to be solved in the present invention is：Existing boiler flue is to be directly connected to denitrification apparatus, when boiler is being opened
When heater stage or underrun, the entrance flue gas temperature of denitrification apparatus is low, NO in flue gasXDischarge is not up to standard, above-mentioned to solve
There is provided the system that a kind of underload improves denitration cigarette temperature for problem.
The purpose of the present invention is realized in the following manner：
The system that a kind of underload improves denitration cigarette temperature, including two vertical flues of boiler tail, two boiler tails are erected
It is both provided with being provided with damper on bypass flue, two bypass flue connections, bypass flue on straight flue；Two bypass cigarettes
Road is respectively low temperature superheater connection flue and denitration entrance connection flue, and low temperature superheater connection flue and denitration entrance are connected
Flue is connected between two vertical flues of boiler tail, the two ends of low temperature superheater connection flue and denitration entrance connection flue
It is both provided with damper；Low temperature superheater is connected to be connected between flue and denitration entrance connection flue by vertical gas pass；When
The boiler of one of vertical flue connection of boiler tail is when opening stove or underrun, the damper on bypass flue is beaten
Open, the part high-temperature flue gas for producing the boiler normally run is entered by bypass flue opens stove or underrun boiler tail
In the vertical flue in portion, flue-gas temperature is raised；When only one of which boiler and underrun, the flue gear on bypass flue is opened
Plate, makes the bypass flue of the vertical flue of the boiler tail open and not connected with the vertical flue of another boiler tail, makes the pot
Partial fume in the vertical flue of stove afterbody is returned in the vertical flue of the boiler tail after entering bypass flue.
The bypass cigarette for being provided directly with connecting in two vertical flues of boiler tail relative to prior art, the present invention
Road, so a boiler, when opening heater stage or underrun, can open bypass flue wherein, make two normally run
Part high-temperature flue gas in the individual vertical flue of boiler tail enters in the vertical flue of underrun boiler tail, improves denitration dress
The entrance flue gas temperature put, makes the NOx emission in flue gas up to standard, and the system operatio flexibly, can meet power plant's Various Complex
Operating condition, with reach any unit underload or can ensure that denitration entrance flue gas temperature is met when opening stove will
Ask.
Brief description of the drawings
Fig. 1 is present system schematic diagram.
Wherein, 1 is #1 low temperature superheater dampers；2 be #1 denitration gas approach baffle plates；3 be #2 low temperature superheater cigarettes
Road baffle plate；4 be #2 denitration gas approach baffle plates；5 be low temperature superheater connection flue；6 be denitration entrance connection flue；7 be vertical
Straight flue；8 be #1 boiler low-temperature superheater entrances；9 be #2 boiler low-temperature superheater entrances；10 be that #2 Denitration in Boiler devices enter
Mouthful；11 be #1 Denitration in Boiler device portals.
Embodiment
As shown in figure 1, the system includes #1 low temperature superheaters damper 1, #1 denitration gas approach baffle plate 2, #2 low temperature
Superheater flue baffle plate 3, #2 denitration gas approach baffle plate 4, low temperature superheater connection flue 5, denitration entrance connect flue 6, hung down
Straight flue 7.Low temperature superheater connection flue 5, denitration entrance connection flue 6 and the composition bypass flue of vertical gas pass 7.
The flue gas of the vertical flue discharge of two boiler tails all enters between denitrification apparatus, two vertical flues of boiler tail
The denitration entrance of connection connects flue 6 close to the junction of the vertical flue of boiler tail and denitrification apparatus.
Flue gas heat is absorbed because the vertical flue of boiler tail is provided with heating surface, therefore flue gas passes through the vertical cigarette of boiler tail
During road, temperature drop can be produced, when boiler for when opening heater stage or underrun, the flue-gas temperature in the vertical flue of boiler tail is not
Very high, completely by the vertical flue of boiler tail after, the flue-gas temperature into denitrification apparatus entrance is lower, and denitrification apparatus can not
Put into operation in time, NO in the flue gas after denitrationXDischarge is not up to standard.
The present invention operation principle be：When the boiler of the vertical flue connection of one of boiler tail is to open stove or underload
During operation, the damper on bypass flue is opened, and makes the part high-temperature flue gas that the boiler normally run is produced by bypassing cigarette
Road, which is entered, to be opened in stove or the vertical flue of underrun boiler tail, raises flue-gas temperature；When only one of which boiler and low negative
Lotus run when, open bypass flue on damper, make the vertical flue of the boiler tail bypass flue open and not with separately
The vertical flue connection of one boiler tail, makes the partial fume in the vertical flue of the boiler tail be returned to after entering bypass flue
In the vertical flue of the boiler tail.
When #1 boilers, which normally run #2 boilers, opens stove or underrun, #1 low temperature superheaters damper 1 is opened, is beaten
#2 low temperature superheaters damper 3 is opened, #1 denitration gas approach baffle plate 2 is closed, #2 denitration gas approach baffle plate 4 is closed, through #1
The high-temperature flue gas that boiler low-temperature superheater entrance 8 enters enters #2 boiler low-temperature superheaters entrance 9, denitrification apparatus inlet flue gas temperature
Degree is improved, and opens spray ammonia, and denitration puts into operation.
When #1 boilers, which normally run #2 boilers, opens stove or underrun, #1 low temperature superheaters damper 1 is opened, is beaten
#2 denitration gas approach baffle plate 4 is opened, #1 denitration gas approach baffle plate 2 is closed, #2 low temperature superheaters damper 3 is closed, through #1
The high-temperature flue gas that boiler low-temperature superheater entrance 8 enters enters #2 Denitration in Boiler device portal 10, denitrification apparatus inlet flue gas temperature
Degree is improved, and opens spray ammonia, and denitration puts into operation.
When #2 boilers, which normally run #1 boilers, opens stove or underrun, #2 low temperature superheaters damper 3 is opened, is beaten
#1 low temperature superheaters damper 1 is opened, #1 denitration gas approach baffle plate 2 is closed, #2 denitration gas approach baffle plate 4 is closed, through #2
The high-temperature flue gas that boiler low-temperature superheater entrance 9 enters enters #1 boiler low-temperature superheaters entrance 8, denitrification apparatus inlet flue gas temperature
Degree is improved, and opens spray ammonia, and denitration puts into operation.
When #2 boilers, which normally run #1 boilers, opens stove or underrun, #2 low temperature superheaters damper 3 is opened, is beaten
#1 denitration gas approach baffle plate 2 is opened, #1 low temperature superheaters damper 1 is closed, #2 denitration gas approach baffle plate 4, #2 pots is closed
The high-temperature flue gas of stove low temperature superheater entrance 9 enters #1 Denitration in Boiler device portal 11, and denitrification apparatus entrance flue gas temperature is improved, opened
Spray ammonia is opened, denitration puts into operation.
When #1 boiler at low load is run, #1 low temperature superheaters damper 1 is opened, #1 denitration gas approach baffle plates are opened
2, #2 low temperature superheaters damper 3 is closed, #2 denitration gas approach baffle plate 4, the high temperature of #1 boiler low-temperature superheaters entrance 8 is closed
Flue gas enters #1 Denitration in Boiler device portal 11, and denitrification apparatus entrance flue gas temperature is improved, and opens spray ammonia, and denitration puts into operation.
When #2 boiler at low load is run, #2 low temperature superheaters damper 3 is opened, #2 denitration gas approach baffle plates are opened
4, #1 low temperature superheaters damper 1 is closed, #1 denitration gas approach baffle plate 2, the high temperature of #2 boiler low-temperature superheaters entrance 9 is closed
Flue gas enters #2 Denitration in Boiler device portal 10, and denitrification apparatus entrance flue gas temperature is improved, and opens spray ammonia, and denitration puts into operation.
Claims (1)
1. the system that a kind of underload improves denitration cigarette temperature, it is characterised in that：Including two vertical flues of boiler tail, two pots
It is both provided with being provided with damper on bypass flue, two bypass flue connections, bypass flue on the vertical flue of stove afterbody；Two
Individual bypass flue is respectively low temperature superheater connection flue and denitration entrance connection flue, and low temperature superheater connects flue and denitration
Entrance connection flue is connected between two vertical flues of boiler tail, low temperature superheater connection flue and denitration entrance connection cigarette
The two ends in road are both provided with damper；Low temperature superheater is connected passes through vertical gas pass between flue and denitration entrance connection flue
Connection；When the boiler of the vertical flue connection of one of boiler tail is opens stove or underrun, the cigarette on bypass flue
Road baffle plate is opened, and the part high-temperature flue gas for producing the boiler normally run is entered by bypass flue opens stove or underload fortune
In the vertical flue of row boiler tail, flue-gas temperature is raised；When only one of which boiler and underrun, open on bypass flue
Damper, make the vertical flue of the boiler tail bypass flue open and not with the vertical flue of another boiler tail connect
It is logical, the partial fume in the vertical flue of the boiler tail is returned to after entering bypass flue in the vertical flue of the boiler tail.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510945667.3A CN105423322B (en) | 2015-12-17 | 2015-12-17 | The system that a kind of underload improves denitration cigarette temperature |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510945667.3A CN105423322B (en) | 2015-12-17 | 2015-12-17 | The system that a kind of underload improves denitration cigarette temperature |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105423322A CN105423322A (en) | 2016-03-23 |
| CN105423322B true CN105423322B (en) | 2017-10-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510945667.3A Active CN105423322B (en) | 2015-12-17 | 2015-12-17 | The system that a kind of underload improves denitration cigarette temperature |
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| CN (1) | CN105423322B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106823792B (en) * | 2017-03-31 | 2023-09-26 | 华能国际电力股份有限公司玉环电厂 | Full-load SCR flue gas denitration system |
| CN107638803A (en) * | 2017-09-22 | 2018-01-30 | 华电电力科学研究院 | A kind of system and its operation method of twin furnace synthetic operation full load denitration |
| CN108826333B (en) * | 2018-06-06 | 2023-06-23 | 华电电力科学研究院有限公司 | System for realizing wide-load denitration by adjacent furnace cross steam-water and operation method thereof |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3637861A1 (en) * | 1986-11-06 | 1988-05-19 | Lentjes Ag | Apparatus for the catalytic denitration of flue gases |
| CN102393005A (en) * | 2011-11-05 | 2012-03-28 | 宁夏科行环保工程有限公司 | Flue gas denitrification and exhaust-heat boiler integrated device |
| CN202709159U (en) * | 2012-07-05 | 2013-01-30 | 东方电气集团东方锅炉股份有限公司 | Boiler capable of meeting full-load operation low exhaust temperature of selective catalytic reduction (SCR) denitration device |
| CN203375462U (en) * | 2013-05-14 | 2014-01-01 | 河北省电力勘测设计研究院 | Power plant denitration system with folding type SCR denitration device |
| CN203316011U (en) * | 2013-07-16 | 2013-12-04 | 中国电力工程顾问集团华北电力设计院工程有限公司 | Structure for improving coal-fired boiler tail smoke denitration input rate |
| CN203916465U (en) * | 2014-06-17 | 2014-11-05 | 宁波连通设备制造有限公司 | A kind of equipment for denitrifying flue gas |
| CN204026623U (en) * | 2014-08-14 | 2014-12-17 | 河北玖翔节能技术有限公司 | The glass kiln power generation boiler by waste with denitrating system interface |
| CN205481068U (en) * | 2015-12-17 | 2016-08-17 | 华电郑州机械设计研究院有限公司 | System for low -load improves denitration gas temperature |
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- 2015-12-17 CN CN201510945667.3A patent/CN105423322B/en active Active
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| Publication number | Publication date |
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| CN105423322A (en) | 2016-03-23 |
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