CN106345293A - Fume turbulent flow device used in SCR denitrification system - Google Patents
Fume turbulent flow device used in SCR denitrification system Download PDFInfo
- Publication number
- CN106345293A CN106345293A CN201610948996.8A CN201610948996A CN106345293A CN 106345293 A CN106345293 A CN 106345293A CN 201610948996 A CN201610948996 A CN 201610948996A CN 106345293 A CN106345293 A CN 106345293A
- Authority
- CN
- China
- Prior art keywords
- flow device
- gas approach
- spoiler
- turbulent flow
- flue gas
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000003517 fume Substances 0.000 title abstract 7
- 238000005507 spraying Methods 0.000 claims abstract description 14
- 239000007789 gas Substances 0.000 claims description 44
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 30
- 239000003546 flue gas Substances 0.000 claims description 30
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 239000004744 fabric Substances 0.000 claims 1
- 239000007787 solid Substances 0.000 claims 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 abstract description 18
- 229910021529 ammonia Inorganic materials 0.000 abstract description 9
- 239000003054 catalyst Substances 0.000 abstract description 6
- 230000007774 longterm Effects 0.000 abstract description 4
- 238000011144 upstream manufacturing Methods 0.000 abstract description 3
- 230000003014 reinforcing effect Effects 0.000 abstract 2
- 239000000779 smoke Substances 0.000 description 5
- 239000007921 spray Substances 0.000 description 5
- 238000005299 abrasion Methods 0.000 description 4
- 235000019504 cigarettes Nutrition 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000000428 dust Substances 0.000 description 2
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8621—Removing nitrogen compounds
- B01D53/8625—Nitrogen oxides
- B01D53/8631—Processes characterised by a specific device
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
- B01D45/04—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia
- B01D45/08—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia by impingement against baffle separators
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention provides a fume turbulent flow device used in an SCR denitrification system, which aims to effectively solve the problems that flue and a catalyst can be abraded as fume is not uniformly distributed, an ammonia spraying tube hole can be blocked, ammonia spraying grids are hard to adjust, the NOx emission of fume at the tail part of a boiler does not meet standards, and the like, and aims to ensure long-term stable operation of a system. The fume turbulent flow device comprises a boiler, an economizer, an inlet flue, an SCR reactor and an outlet flue which are connected in sequence, wherein ammonia spraying grids are mounted inside the inlet flue; a turbulent flow device is further mounted inside the inlet flue at the upstream of the ammonia spraying grids; the turbulent flow device is perpendicular to a fume incoming direction plane inside the inlet flue; the turbulent flow device comprises a reinforcing plate which is fixed inside the inlet flue; turbulent flow plates are fixed on two end surfaces of the reinforcing plate; the turbulent flow plates at two ends are arranged in a cross manner; the windward sides of the turbulent flow plates at two ends are respectively inclined relative to incoming fume inside the inlet flue.
Description
Technical field
The present invention relates to the technical field of coal-fired power plant's equipment for denitrifying flue gas, especially selective catalytic reduction
(scr) be used for the disturbing flow device in denitration reactor inlet flue in denitration technology, specially a kind of for scr denitrating system
Flue gas disturbing flow device.
Background technology
Scr denitration technology be apply now at most, maturation effectively a kind of flue gas nox removing sulfuldioxide the most, in recent years, with
Proposition and the popularization of minimum discharge theory, power-plant flue gas nox discharge standard is more and more stricter, and this proposes more to denitration device
High request；General scr denitration flue gas treating process flow process is: respectively through boiler back end ductwork outlet → denitration reactor inlet
Flue → Benitration reactor → exhaust pass, but in boiler smoke scr denitration engineering, scr system flow field is optimized
Shi Faxian, due to the impact of air distribution and burning in boiler running process, in heated surface at the end of boiler passage, flue gas flow rate is uneven, cigarette
Gentle in deviation, this can lead to nox skewness in flue, spray ammonia tube hole plug, uptake flue inwall and denitration catalyst
The problems such as abrasion in agent, thus not only making catalyst efficiency decline, afterbody nox discharge is exceeded, also shortens other simultaneously and sets
Standby service life.
Content of the invention
For the problems referred to above, the invention provides a kind of flue gas disturbing flow device for scr denitrating system, it can effectively solve
The flue that certainly smoke distribution inequality leads to and catalyst abrasion, spray ammonia tube hole plug, ammonia-spraying grid adjust difficulty and increase and boiler
The problems such as tail flue gas nox discharge is up to standard, can guarantee that system is run steadily in the long term.
Its technical scheme is so: boiler that it includes being sequentially connected, economizer, gas approach, scr reactor, outlet
Flue, in described gas approach, ammonia-spraying grid is installed it is characterised in that: in the described entrance cigarette of described ammonia-spraying grid upstream
It is also equipped with disturbing flow device, described disturbing flow device is perpendicular with flue gas direction of flow plane in described gas approach, described in road
Disturbing flow device includes the securing plate being fixed in described gas approach, is respectively and fixedly provided with spoiler in described securing plate both ends of the surface, and
The spoiler at two ends is in arranged crosswise, the windward side of the spoiler at two ends respectively with described gas approach in incline flowing Gas phase Smoke
Tiltedly.
It is further characterized by described securing plate and is paralleled setting with described gas approach wall, and described securing plate exists
All it is spaced evenly distributed arrangement along on described gas approach length direction, width, the described flow-disturbing in described securing plate
To flow the slanted angle between flue gas in the corresponding and described gas approach in plate windward side and to be 30 ° ~ 45 °；
Between described spoiler at least 3 row on described gas approach width, and the adjacent two described spoilers of row it is in
Interlock and be arranged symmetrically, the described spoiler near described gas approach wall side is fixedly connected with described gas approach inwall；
It is 450 mm ~ 550mm along the center distance between the described spoiler on described gas approach length direction；Described
The length of spoiler is 300mm ~ 500mm, and width is 400 mm ~ 600mm；
Described spoiler, the material of securing plate are steel plate.
In the said structure of the present invention, due to increased disturbing flow device in the gas approach of scr reactor, spoiler with
Tilting flowing flue gas in gas approach, thus the flue gas introducing from boiler back end ductwork is sufficiently mixed, adjustment
The distribution of flue gas flow rate and nox, simultaneously big to granularity dust serves certain inhibition again, efficiently solves cigarette
The flue that gas skewness leads to and catalyst abrasion, spray ammonia tube hole plug, ammonia-spraying grid adjust difficulty and increase and boiler tail
The problems such as flue gas nox discharge is up to standard, ensure that the operation steady in a long-term of system afterwards.
Brief description:
Fig. 1 is the mounting structure schematic diagram of the present invention；
Fig. 2 is the disturbing flow device in gas approach of the present invention, the installation mplifying structure schematic diagram of ammonia-spraying grid；
Fig. 3 is the sectional perspective schematic diagram of disturbing flow device of the present invention；
Fig. 4 is the side view of disturbing flow device of the present invention.
Specific embodiment
As shown in Figure 1, Figure 2, Figure 3, Figure 4, in figure arrow is flue gas flow direction, and the present invention includes boiler 1, the province being sequentially connected
Coal device 2, gas approach 3, scr reactor 4, exhaust pass 5, are provided with ammonia-spraying grid 6 in gas approach 3, in ammonia-spraying grid 6
It is also equipped with disturbing flow device 7, disturbing flow device 7 is hung down with flue gas direction of flow plane phase in gas approach 3 in the gas approach 3 of upstream
Directly, disturbing flow device 7 includes the securing plate 8 being fixed in gas approach 3, is respectively and fixedly provided with spoiler 9 in securing plate 8 both ends of the surface, and
The spoiler 9 at two ends is in arranged crosswise, the windward side of the spoiler 9 at two ends respectively with gas approach 3 in incline flowing Gas phase Smoke
Tiltedly.
Securing plate 8 parallels setting with gas approach 3 wall, and securing plate 8 is along gas approach 3 length direction, width
Evenly distributed arrangement is all spaced on direction, to flow between flue gas in the spoiler 9 windward side correspondence in securing plate 8 and gas approach 3
Slanted angle be 43 °；Securing plate 8 is in row × row: 6 × 3 evenly distributed arrangements, i.e. disturbing on gas approach 3 width
Stream plate 9 has 4 row, and between adjacent two row spoilers 9 be in staggered be arranged symmetrically, the spoiler 9 near gas approach 3 wall side with enter
Mouth flue 3 inwall is fixedly connected, and is 500mm along the center distance between the spoiler 9 on gas approach 3 length direction；Disturb
The length of stream plate 9 is 400mm, and width is 450mm, and the length of spoiler 9 is more than the length of securing plate 8, and the width of spoiler 9 is big
Width in securing plate 8；Spoiler 9, the material of securing plate 8 are steel plate.
In the present invention, when to flow disturbing flow device 7 that flue gas flows through in scr reactor 4 gas approach 3, flue gas is by flow-disturbing
Plate 9 flows through ammonia-spraying grid 6 after being sufficiently mixed, the distribution of flue gas flow rate and nox is adjusted, and the big dust of granularity also obtains simultaneously
To certain obstruction, efficiently solve flue and catalyst abrasion, spray ammonia tube hole plug, the spray ammonia lattice that smoke distribution inequality leads to
Grid adjust difficulty and increase and the problems such as boiler tail flue gas nox discharge is up to standard, thus ensureing that system is run steadily in the long term.
Claims (5)
1. a kind of flue gas disturbing flow device for scr denitrating system, boiler that it includes being sequentially connected, economizer, gas approach,
Scr reactor, exhaust pass, in described gas approach, ammonia-spraying grid is installed it is characterised in that: on described ammonia-spraying grid
It is also equipped with disturbing flow device, described disturbing flow device is put down with flue gas direction of flow in described gas approach in the described gas approach of trip
Face is perpendicular, and described disturbing flow device includes the securing plate being fixed in described gas approach, all solid in described securing plate both ends of the surface
Surely have spoiler, and the spoiler at two ends be in arranged crosswise, the windward side of the spoiler at two ends respectively with described gas approach in
Tilt flowing flue gas.
2. a kind of flue gas disturbing flow device for scr denitrating system according to claim 1 it is characterised in that: described plus
Gu plate parallels setting with described gas approach wall, described securing plate is along described gas approach length direction, width side
All be spaced evenly distributed arrangement upwards, the described spoiler windward side in described securing plate corresponding with described gas approach in flowing
Slanted angle between flue gas is 30 ° ~ 45 °.
3. a kind of flue gas disturbing flow device for scr denitrating system according to claim 1 it is characterised in that: described
In the symmetrical cloth that interlocks between described spoiler at least 3 row on gas approach width, and the adjacent two described spoilers of row
Put, the described spoiler near described gas approach wall side is fixedly connected with described gas approach inwall.
4. a kind of flue gas disturbing flow device for scr denitrating system according to claim 1 it is characterised in that: along institute
Stating the center distance between the described spoiler on gas approach length direction is 450 mm ~ 550mm；The length of described spoiler
Spend for 300mm ~ 500mm, width is 400 mm ~ 600mm.
5. a kind of flue gas disturbing flow device for scr denitrating system according to claim 1 it is characterised in that: described disturb
Stream plate, the material of securing plate are steel plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610948996.8A CN106345293A (en) | 2016-11-03 | 2016-11-03 | Fume turbulent flow device used in SCR denitrification system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610948996.8A CN106345293A (en) | 2016-11-03 | 2016-11-03 | Fume turbulent flow device used in SCR denitrification system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106345293A true CN106345293A (en) | 2017-01-25 |
Family
ID=57863592
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610948996.8A Pending CN106345293A (en) | 2016-11-03 | 2016-11-03 | Fume turbulent flow device used in SCR denitrification system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106345293A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107376642A (en) * | 2017-09-01 | 2017-11-24 | 北京晨晰环保工程有限公司 | A kind of SCR methods flue gas denitration reactor |
| CN109173694A (en) * | 2018-09-28 | 2019-01-11 | 河南安彩高科股份有限公司 | A kind of desulphurization reaction pipe, desulfurization dust-removal system and its technique based on desulphurization reaction pipe |
| CN110043916A (en) * | 2019-04-22 | 2019-07-23 | 广东电网有限责任公司 | A kind of boiler flue and a kind of denitrating system |
| CN111551424A (en) * | 2020-05-21 | 2020-08-18 | 国网天津市电力公司电力科学研究院 | Application to SO2Flue gas mixer for concentration measurement |
| CN112294109A (en) * | 2019-07-30 | 2021-02-02 | 安庆诚旺厨具科技有限公司 | Special flue system for noodle cooking machine |
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| CN201949798U (en) * | 2011-03-01 | 2011-08-31 | 南京龙源环保有限公司 | Flue gas mixing device in front of selective catalytic reduction (SCR) inlet in selective non-catalytic reduction/selective catalytic reduction (SNCR/SCR) combined denitration system |
| WO2012023025A1 (en) * | 2010-08-19 | 2012-02-23 | Alstom Technology Ltd | A gas cleaning system having a gas flow rectifier |
| CN102814119A (en) * | 2012-09-11 | 2012-12-12 | 上海龙净环保科技工程有限公司 | Silicon controlled rectifier (SCR) denitration device of waste gas pre-dedusting ammonia spraying disk in power plant |
| US20130195728A1 (en) * | 2010-05-14 | 2013-08-01 | Houjie Sun | Wet flue gas desulfurization absorption tower for for power plant |
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| CN105797583A (en) * | 2016-03-18 | 2016-07-27 | 东方电气集团东方锅炉股份有限公司 | Efficient denitration device with low ammonia escape |
| CN206184257U (en) * | 2016-11-03 | 2017-05-24 | 无锡华光新动力环保科技股份有限公司 | A flue gas vortex device for SCR deNOx systems |
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2016
- 2016-11-03 CN CN201610948996.8A patent/CN106345293A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20130195728A1 (en) * | 2010-05-14 | 2013-08-01 | Houjie Sun | Wet flue gas desulfurization absorption tower for for power plant |
| WO2012023025A1 (en) * | 2010-08-19 | 2012-02-23 | Alstom Technology Ltd | A gas cleaning system having a gas flow rectifier |
| CN201949798U (en) * | 2011-03-01 | 2011-08-31 | 南京龙源环保有限公司 | Flue gas mixing device in front of selective catalytic reduction (SCR) inlet in selective non-catalytic reduction/selective catalytic reduction (SNCR/SCR) combined denitration system |
| CN102814119A (en) * | 2012-09-11 | 2012-12-12 | 上海龙净环保科技工程有限公司 | Silicon controlled rectifier (SCR) denitration device of waste gas pre-dedusting ammonia spraying disk in power plant |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107376642A (en) * | 2017-09-01 | 2017-11-24 | 北京晨晰环保工程有限公司 | A kind of SCR methods flue gas denitration reactor |
| CN107376642B (en) * | 2017-09-01 | 2020-02-14 | 北京晨晰环保工程有限公司 | SCR method flue gas denitration reactor |
| CN109173694A (en) * | 2018-09-28 | 2019-01-11 | 河南安彩高科股份有限公司 | A kind of desulphurization reaction pipe, desulfurization dust-removal system and its technique based on desulphurization reaction pipe |
| CN109173694B (en) * | 2018-09-28 | 2024-04-09 | 河南安彩高科股份有限公司 | Desulfurization reaction tube, desulfurization dust removal system based on desulfurization reaction tube and process of desulfurization dust removal system |
| CN110043916A (en) * | 2019-04-22 | 2019-07-23 | 广东电网有限责任公司 | A kind of boiler flue and a kind of denitrating system |
| CN112294109A (en) * | 2019-07-30 | 2021-02-02 | 安庆诚旺厨具科技有限公司 | Special flue system for noodle cooking machine |
| CN112294109B (en) * | 2019-07-30 | 2021-12-24 | 安庆诚旺厨具科技有限公司 | Special flue system for noodle cooking machine |
| CN111551424A (en) * | 2020-05-21 | 2020-08-18 | 国网天津市电力公司电力科学研究院 | Application to SO2Flue gas mixer for concentration measurement |
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| C06 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170125 |
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