CN208786167U - A kind of system of the wide load denitration of air water cooperative achievement - Google Patents
A kind of system of the wide load denitration of air water cooperative achievement Download PDFInfo
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- CN208786167U CN208786167U CN201821104147.5U CN201821104147U CN208786167U CN 208786167 U CN208786167 U CN 208786167U CN 201821104147 U CN201821104147 U CN 201821104147U CN 208786167 U CN208786167 U CN 208786167U
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- economizer
- bypass
- carbonated drink
- gas
- flue
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 48
- 235000014171 carbonated beverage Nutrition 0.000 claims abstract description 38
- 239000007789 gas Substances 0.000 claims abstract description 34
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000003546 flue gas Substances 0.000 claims abstract description 23
- 239000000779 smoke Substances 0.000 claims abstract description 18
- 238000006243 chemical reaction Methods 0.000 claims abstract description 16
- 238000005507 spraying Methods 0.000 claims abstract description 11
- 239000003245 coal Substances 0.000 claims description 3
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 239000002440 industrial waste Substances 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- 235000019504 cigarettes Nutrition 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002779 inactivation Effects 0.000 description 1
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 1
- 238000013517 stratification Methods 0.000 description 1
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- Treating Waste Gases (AREA)
Abstract
The utility model relates to a kind of systems of the wide load denitration of air water cooperative achievement, belong to industrial waste gas purifying environmental protection and energy field.Currently, the problem of cannot putting into operation when the generally existing underrun of SCR denitration device.The utility model includes boiler, flue, economizer, ammonia-spraying grid, SCR denitration reaction device, air preheater, carbonated drink bypass and gas bypass；The bypass of setting carbonated drink and gas bypass are imported and exported in economizer, by bypass carbonated drink or flue gas, reduction carbonated drink absorbs heat in economizer or flue gas heat release in economizer, to improve economizer exit smoke temperature, realizes the wide load denitration of unit.The utility model has many advantages, such as that system is simple, O&M is flexible, is with a wide range of applications.
Description
Technical field
The utility model relates to a kind of system of the wide load denitration of air water cooperative achievement, belong to industrial waste gas purifying environmental protection and
Energy field.
Background technique
Energy resource structure of the China based on coal will not change within the long duration, therefore, control coal-fired flue-gas NOx emission
It is an important process of China's control atmosphere pollution.With NH3It is for NOx selective catalytic reduction (SCR) technology of reducing agent
Most widely used in recent years, most effective coal-fired flue gas denitration technology.But there is operation in the SCR denitration of Current commercial application
Smoke temperature requirement will lead to catalyst inactivation lower than the operation of this temperature range, this results in coal unit generally at 300-420 DEG C
It is unable to run denitrification apparatus in underrun, and then can not achieve qualified discharge.Therefore, how SCR denitration is effectively solved
Put into operation problem of the device under underrun, becomes the important topic in current coal-fired flue gas denitration field.
In the prior art, such as 204678311 U of CN --- " economizer bypath system " is by the way that economizer flue gas is arranged
Bypass reduces flue gas heat release in underrun to meet underload denitration service requirement, but coal-fired for current large capacity
Unit, gas bypass section is excessive the problems such as being easy to cause baffle deformation, dust stratification, abrasion, therefore bypasses exhaust gas volumn and smoke temperature tune
Adjusting range is limited.
In the prior art, such as 102937296 A of CN --- " a kind of boiler for being applicable in denitration device full load and putting into operation " is
By economizer step-by-step arrangement, the sequence of two-stage economizer is entered by controlling carbonated drink medium, to control the caloric receptivity of economizer, from
And underload smoke temperature is promoted to meet denitration service requirement, but is needed using economizer hierarchical arrangement, for active service unit, it changes
It is larger to make project amount, and needs to consider oepration at full load smoke temperature problem, therefore its temperature adjustment limited extent.
Utility model content
The purpose of the utility model is to overcome the above deficiencies in the existing technologies, and provide it is a kind of design rationally,
Project amount is small, O&M is simple, the air water collaboration for the problem that cannot put into operation for current SCR denitration device in underrun
The system for realizing wide load denitration.
The technical scheme in the invention for solving the above technical problem is: a kind of wide load denitration of air water cooperative achievement
System, including boiler and flue, the boiler are connected to flue；It is characterized in that, further including economizer, ammonia-spraying grid, SCR de-
Nitre reactor, air preheater, carbonated drink bypass and gas bypass；The economizer, ammonia-spraying grid, SCR denitration reaction device and air preheater
It is sequentially arranged in flue along flow of flue gas direction；The outside of flue is arranged in the carbonated drink bypass and gas bypass；It is described
The entrance of carbonated drink bypass is arranged in front of the feed-water intake of economizer, and the water outlet of economizer is arranged in the outlet of the carbonated drink bypass
Mouth rear, for the water supply of part economizer to be led to the water outlet of economizer by the feed-water intake of economizer；By the flue gas
The entrance on road is arranged in front of the smoke inlet of economizer, after the exhanst gas outlet of economizer is arranged in the outlet of the gas bypass
Side, the cigarette before entrance ammonia-spraying grid for part high-temperature flue gas to be led to SCR denitration reaction device by the smoke inlet of economizer
In road.
Furthermore, it is provided with steam water pump in the carbonated drink bypass, by adjusting steam water pump power output control carbonated drink bypass
Middle Steam-water Flow.
Furthermore, the entrance and exit of the gas bypass is respectively arranged with entrance by-pass damper and outlet bypass gear
Plate adjusts entrance by-pass damper as needed and exports the aperture of by-pass damper, to control exhaust gas volumn in gas bypass.
A kind of operation method of the system of the wide load denitration of air water cooperative achievement as described above, which is characterized in that described
Operation method is as follows: when performing low-load running of machine set, the low temperature feedwater of part economizer feed-water intake is drawn by opening steam water pump
To the water outlet and high temperature steam-water mixing of economizer, absorbs heat in economizer to reduce carbonated drink, meet SCR denitration reaction temperature
It is required that realizing the wide load denitration of unit；Or；Draw part high-temperature flue gas extremely by opening entrance by-pass damper and outlet by-pass damper
The entrance of SCR denitration reaction device is mixed with low-temperature flue gas, to reduce flue gas heat release in economizer, meets SCR denitration reaction
Temperature requirement realizes the wide load denitration of unit.
Furthermore, when performing low-load running of machine set and individually open carbonated drink bypass or gas bypass to be unable to satisfy SCR de-
When nitre runs smoke temperature, while carbonated drink bypass and gas bypass flue are opened, to greatly improve the outlet smoke temperature of economizer, realized
The wide load denitration of unit.
Furthermore, in actual operation, corresponding to adjust by carbonated drink by monitoring the smoke entrance smoke temperature of economizer
The entrance by-pass damper and outlet by-pass damper aperture that the steam water pump on road is contributed and carbonated drink bypasses, to meet operation demand.
The utility model compared with prior art, has the following advantages that and effect: the utility model proposes air water collaboration
It realizes the System and method for of wide load denitration, i.e., carbonated drink bypass and gas bypass is respectively set in economizer inlet and outlet, in unit
When underrun, by bypass segment carbonated drink or flue gas, to reduce the heat absorption of economizer carbonated drink or flue gas heat release, unit is realized
Wide load denitration.The utility model can the wide load denitration of air water cooperative achievement, have many advantages, such as that system is simple, O&M is flexible, have
Have wide practical use.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model embodiment.
In figure: boiler 1, economizer 2, ammonia-spraying grid 3, SCR denitration reaction device 4, air preheater 5, carbonated drink bypass 6, steam water pump
7, gas bypass 8, entrance by-pass damper 9, outlet by-pass damper 10, flue 11.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawing and by embodiment, and following embodiment is pair
The explanation of the utility model and the utility model is not limited to following embodiment.
Embodiment.
Referring to Fig. 1, the system of the wide load denitration of air water cooperative achievement in the present embodiment, including boiler 1 and flue 11, pot
Furnace 1 is connected to flue 11；It further include economizer 2, ammonia-spraying grid 3, SCR denitration reaction device 4, air preheater 5, carbonated drink bypass 6 and cigarette
Gas bypass 8；Economizer 2, ammonia-spraying grid 3, SCR denitration reaction device 4 and air preheater 5 in flue 11 along flow of flue gas direction according to
Secondary arrangement；The outside of flue 11 is arranged in carbonated drink bypass 6 and gas bypass 8；Economizer 2 is arranged in the entrance of carbonated drink bypass 6
In front of feed-water intake, the water outlet rear of economizer 2 is arranged in the outlet of carbonated drink bypass 6, for by the water supply of part economizer 2
The water outlet of economizer 2 is led to by the feed-water intake of economizer 2；The smoke inlet of economizer 2 is arranged in the entrance of gas bypass 8
The exhanst gas outlet rear of economizer 2 is arranged in front, the outlet of gas bypass 8, for by part high-temperature flue gas by economizer 2
Smoke inlet is led in the flue 11 before the entrance ammonia-spraying grid 3 of SCR denitration reaction device 4.
In the present embodiment, it is provided with steam water pump 7 in carbonated drink bypass 6, by adjusting the power output control carbonated drink of steam water pump 7 bypass 6
Middle Steam-water Flow.
In the present embodiment, the entrance and exit of gas bypass 8 is respectively arranged with entrance by-pass damper 9 and outlet by-pass damper
10, it adjusts entrance by-pass damper 9 as needed and exports the aperture of by-pass damper 10, to control exhaust gas volumn in gas bypass 8.
The operation method of the system of the wide load denitration of above-mentioned air water cooperative achievement is as follows: when performing low-load running of machine set,
Low temperature feedwater to the water outlet of economizer 2 and high temperature carbonated drink for drawing economizer 2 feed-water intake in part by opening steam water pump 7 mixes
It closes, absorbs heat in economizer 2 to reduce carbonated drink, meet SCR denitration reaction temperature requirement, realize the wide load denitration of unit；Or；
By open entrance by-pass damper 9 and outlet by-pass damper 10 draw part high-temperature flue gas to SCR denitration reaction device 4 entrance with it is low
Warm flue gas mixing meets SCR denitration reaction temperature requirement to reduce flue gas heat release in economizer 2, realizes the wide load of unit
Denitration.
In the present embodiment, when performing low-load running of machine set and individually opens carbonated drink bypass 6 or gas bypass 8 is unable to satisfy SCR
When denitration runs smoke temperature, while carbonated drink bypass 6 and 8 flue of gas bypass are opened, to greatly improve the outlet cigarette of economizer 2
Temperature realizes the wide load denitration of unit.
In the present embodiment, in actual operation, by monitoring the smoke entrance smoke temperature of economizer 2, carbonated drink is accordingly adjusted
The power output of steam water pump 7 of bypass 6 and the entrance by-pass damper 9 of carbonated drink bypass 6 and outlet 10 aperture of by-pass damper, to meet operation
Demand.
Although the utility model is disclosed as above with embodiment, its protection scope being not intended to limit the utility model,
Any technical staff for being familiar with this technology, it is made in the conception and scope for not departing from the utility model to change and retouch,
It all should belong to the protection range of the utility model.
Claims (3)
1. a kind of system of the wide load denitration of air water cooperative achievement, including boiler and flue, the boiler are connected to flue；It is special
Sign is, further includes economizer, ammonia-spraying grid, SCR denitration reaction device, air preheater, carbonated drink bypass and gas bypass；Province's coal
Device, ammonia-spraying grid, SCR denitration reaction device and air preheater are sequentially arranged in flue along flow of flue gas direction；By the carbonated drink
The outside of flue is arranged in road and gas bypass；The entrance of the carbonated drink bypass is arranged in front of the feed-water intake of economizer, institute
The water outlet rear of economizer is arranged in the outlet for stating carbonated drink bypass, for the water supply by the water supply of part economizer by economizer
Entrance leads to the water outlet of economizer；The entrance of the gas bypass is arranged in front of the smoke inlet of economizer, the flue gas
The exhanst gas outlet rear of economizer is arranged in the outlet of bypass, for leading to part high-temperature flue gas by the smoke inlet of economizer
In flue before the entrance ammonia-spraying grid of SCR denitration reaction device.
2. the system of the wide load denitration of air water cooperative achievement according to claim 1, which is characterized in that the carbonated drink bypass
On be provided with steam water pump, pass through adjust steam water pump power output control carbonated drink bypass in Steam-water Flow.
3. the system of the wide load denitration of air water cooperative achievement according to claim 1, which is characterized in that the gas bypass
Entrance and exit be respectively arranged with entrance by-pass damper and outlet by-pass damper, as needed adjust entrance by-pass damper and go out
The aperture of mouth by-pass damper, to control exhaust gas volumn in gas bypass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821104147.5U CN208786167U (en) | 2018-07-12 | 2018-07-12 | A kind of system of the wide load denitration of air water cooperative achievement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821104147.5U CN208786167U (en) | 2018-07-12 | 2018-07-12 | A kind of system of the wide load denitration of air water cooperative achievement |
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| CN208786167U true CN208786167U (en) | 2019-04-26 |
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| CN201821104147.5U Active CN208786167U (en) | 2018-07-12 | 2018-07-12 | A kind of system of the wide load denitration of air water cooperative achievement |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108786459A (en) * | 2018-07-12 | 2018-11-13 | 华电电力科学研究院有限公司 | A kind of system and its operation method of the wide load denitration of air water cooperative achievement |
| CN110145732A (en) * | 2019-05-13 | 2019-08-20 | 哈尔滨锅炉厂有限责任公司 | Large coal powder boiler ultra-low load economizer switches bypath system |
| CN112546861A (en) * | 2019-09-26 | 2021-03-26 | 华北理工大学 | Combined denitration system and method for preheating section and tail flue of steel rolling heating furnace |
-
2018
- 2018-07-12 CN CN201821104147.5U patent/CN208786167U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108786459A (en) * | 2018-07-12 | 2018-11-13 | 华电电力科学研究院有限公司 | A kind of system and its operation method of the wide load denitration of air water cooperative achievement |
| CN110145732A (en) * | 2019-05-13 | 2019-08-20 | 哈尔滨锅炉厂有限责任公司 | Large coal powder boiler ultra-low load economizer switches bypath system |
| CN112546861A (en) * | 2019-09-26 | 2021-03-26 | 华北理工大学 | Combined denitration system and method for preheating section and tail flue of steel rolling heating furnace |
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