CN104959000B - Multi-functional full load scope intelligent flue gas denitrating system - Google Patents
Multi-functional full load scope intelligent flue gas denitrating system Download PDFInfo
- Publication number
- CN104959000B CN104959000B CN201510325217.4A CN201510325217A CN104959000B CN 104959000 B CN104959000 B CN 104959000B CN 201510325217 A CN201510325217 A CN 201510325217A CN 104959000 B CN104959000 B CN 104959000B
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- channel unit
- flue gas
- water conservancy
- unit
- conservancy diversion
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- 239000003546 flue gas Substances 0.000 title claims abstract description 32
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 30
- 239000007789 gas Substances 0.000 claims description 10
- 238000012423 maintenance Methods 0.000 claims description 10
- 239000011888 foil Substances 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims description 9
- 230000003197 catalytic effect Effects 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 3
- 239000004744 fabric Substances 0.000 claims 1
- 239000002184 metal Substances 0.000 claims 1
- 239000003517 fume Substances 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 9
- 229910021529 ammonia Inorganic materials 0.000 description 4
- 239000003054 catalyst Substances 0.000 description 4
- 239000003245 coal Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 230000008439 repair process Effects 0.000 description 3
- 230000011218 segmentation Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000035558 fertility Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000003916 acid precipitation Methods 0.000 description 1
- 239000000809 air pollutant Substances 0.000 description 1
- 231100001243 air pollutant Toxicity 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 238000013517 stratification Methods 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
Landscapes
- Treating Waste Gases (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
The present invention provides a kind of multi-functional full load scale fume denitrating system, this system at least includes the channel unit of two groups of control flue gases, this channel unit be arranged in SCR reactor inlet flue or reactor front end, each channel unit arrangement at grade or is connected with each other in the multiple planes of arrangement, each channel unit is provided with one or more water conservancy diversion fairings, when having multiple water conservancy diversion fairing in each channel unit, then arrange at grade.One or more channel units are set in the present invention, and channel unit adopts the guide vane structure of water conservancy diversion fairing, and this design is applied in flue gas denitrification system, beneficial to the Balance route of flue gas flow.The equal control in the flow field such as temperature field, velocity field, concentration field in achievable flue gas denitrification system, to improve denitration performance.
Description
Technical field：
The present invention relates to a kind of multi-functional matching unit full load scale fume denitrating system, belong to resource and environment filed.
Background technology：
Nitrogen oxides, as one of the Air Pollutants of global priority control, lead to acid rain and photochemical fog
One of key component, various coal-burning boilers, industrial furnace are one of its main emission sources, flue gas denitrification system (SCR) conduct
When current main-stream control technology has many technical bottlenecks, especially underload in the application, flue gas is through denitration SCR reactor stream
The low ash-laden gas that is easily caused of speed blocks in catalyst, the problems such as the escaping of ammonia, or the low denitration performance of temperature is poor, uncomfortable
Close gametic fertility, part transformation project furnace rear transformation place nervous it is impossible to integral arrangement denitration facility.China's coal unit load
Frequently, many fired power generating unit participate in peak load regulation network, especially peak regulation frequently, or even the unit load excursion of depth peak regulation for change
Bigger, peak regulation frequency time is more, leads to denitration facility operational percentage low.Additionally, it is temperature field in flue gas denitrification system, velocity field, dense
The presence of situations such as flow fields such as degree field are uneven, leads to regional temperature, flow velocity, concentration various dimensions field uneven, and then leads to denitration
Poor performance is also common problem.
Appearance with environmental protection new-standard, the particularly new rule of the series such as emission limit environmental protection is implemented, and the control of NOx requires more
Plus become tight, propose higher to aspects such as NO_x Reduction by Effective in the range of full load for the coal unit, operational percentage guarantee, high-adaptabilities
Requirement.
Content of the invention：
For solving the problems, such as prior art, the present invention proposes a kind of multi-functional full load scale fume denitrating system.
The object of the invention employs the following technical solutions to realize：
A kind of multi-functional full load scale fume denitrating system, at least includes the channel unit of two groups of control flue gases, and this leads to
Road unit be arranged in SCR reactor inlet flue or reactor front end, each channel unit arrangement is at grade or phase
Connect in the multiple planes of arrangement, each channel unit is provided with one or more water conservancy diversion fairings, if in each channel unit
There are multiple water conservancy diversion fairings, then arrange at grade.
The design further of the present invention is：
It is provided with the channel unit of four groups of control flue gases in the front end of reactor, channel unit is located in a plane two-by-two,
It is distributed in altogether in two planes, and two planes are vertically arranged in 90, each channel unit arranges six groups of water conservancy diversion fairings.
Described water conservancy diversion fairing includes a rotating shaft, and some groups of stators being arranged in rotating shaft, and every group of stator is installed
In an axle sleeve, every group of stator includes two blades, and two blades are in 180 ° and are relatively located on its axle sleeve, and each axle sleeve is sleeved on successively
In described rotating shaft, after installation each group stator along shaft length direction successively arranged adjacent in rotating shaft, and the drive end of each axle sleeve
Homonymy positioned at rotating shaft.
In the axle sleeve of each group stator, the axle sleeve from one group of farthest stator of drive end is directly sleeved in described rotating shaft, by
Far and closely successively it is set with, the axle sleeve from one group of nearest stator of drive end is sleeved on outermost layer.
Described rotating shaft is provided with 3～25 groups of stators, and the length of blade of each stator is identical.
The edge of blade is provided with sealing sheet；The side of blade is provided with flexible sealing strip or foil, and adjacent blades lead to
Cross this flexible sealing strip or foil matches.
Each channel unit is each configured with independent gas channel, or all channel unit integral arrangement are in an air-flow
In passage.
It is provided with multigroup maintenance closed guard in SCR catalytic reactor bottom.
The present invention has the advantage that compared to existing technology：
The 1st, one or more channel units are set in the present invention, and channel unit adopts the guide vane structure of water conservancy diversion fairing,
This design is applied in flue gas denitrification system, beneficial to the Balance route of flue gas flow.Temperature field in achievable flue gas denitrification system,
The equal control in the flow fields such as velocity field, concentration field, to improve denitration performance.
2nd, the system of the present invention meets the requirement of the aspects such as coal unit many loads NO_x Reduction by Effective, high-adaptability.
3rd, in the present invention, water conservancy diversion fairing is connected in series by some blades, and every group of stator in rotating shaft can lead to rotary shaft
Set drives, and realizes the regulation of coaxial multiple-blade difference angle.
4th, in the present invention, water conservancy diversion fairing may be mounted on SCR reactor inlet flue, also may be installed reactor
Inner Front End, specifically visual place space subdivision preferred arrangement.By the structure of multiple-blade concatenation type, achievable unit channel and whole
The regulation of individual SCR reactor section.This device can realize velocity field, concentration field, the homogenization function of temperature field various dimensions field, profit
In type smoke pollutant removal.
5th, in the present invention, stator is in that 180 degree is arranged by two blades, and achievable flue gas various flow rate controls, when coaxially closing
Can achieve each stator unitary closed, realize flue section and turn off closure.
6th, drive system is used for the driving that rotating shaft drives axle sleeve, and the adjustment angle of every group of stator is in 0-360 degree or 0-180
Degree, can adopt electronic, it would however also be possible to employ pneumatically or hydraulically drive.Each gate positing scalable, may be alternatively located at same position, with
When open or close passage, during sealing, the foil thermal expansion crush seal of each blade side.
Brief description:
Fig. 1 is present system structural representation.
Fig. 2 is water conservancy diversion fairing structural representation in the present invention.
Fig. 3 is the side view of six water conservancy diversion fairings in Fig. 2.
Fig. 4 is the structural representation of a water conservancy diversion fairing.
Fig. 5 is the side view of Fig. 4.
In figure：1- rotating shaft；2- blade；3- axle sleeve；4- foil；5- framework；10- microplate blade string；20- maintenance closing
Device；30- segmentation economizer；40- ammonia-gas spraying device；50-SCR catalyst layer；
Specific embodiment：
Below in conjunction with the accompanying drawings, the invention will be further described.
Embodiment one：
As shown in Figure 4, Figure 5, a kind of water conservancy diversion fairing, including rotating shaft 1 and some groups of stators being arranged in rotating shaft 1,
Every group of stator is arranged on an axle sleeve 3, and every group of stator includes two blades 2, and two blades are in 180 ° and are relatively located at its axle sleeve 3
On, each axle sleeve is sleeved in described rotating shaft 1 successively, after installation each group stator along shaft length direction successively arranged adjacent in rotating shaft
On 1, and the drive end of each axle sleeve is located at the homonymy of rotating shaft 1, and in order to drive, the axle sleeve drive end of each blade of in figure is respectively positioned on a left side
Side.In figure preferably has 6 (3～25 groups) group stators, and the length of blade of each stator is identical, every group of stator of in figure and rotating shaft
Relative position is different.
In the axle sleeve of each group stator, directly it is sleeved in described rotating shaft 1 from the axle sleeve of one group of farthest stator of drive end, by
Far and closely successively it is set with, the axle sleeve from one group of nearest stator of drive end is sleeved on outermost layer.So by tandem for each group stator
In a piece rotating shaft.
The edge of blade 2 is provided with foil 4, to realize good closing effect.
The side of blade is provided with flexible sealing strip or foil, and adjacent blades pass through this flexible sealing strip or foil
Match, to realize opposing seal.
For rotation adjustment driving, adjustment angle 0-360 degree or the 0-180 degree of the stator series rotary axle box that interlocks, drive
System can adopt electronic, it would however also be possible to employ pneumatically or hydraulically drives.
Embodiment two：
As shown in figure 1, flue gas denitrification system mainly includes boiler, segmentation economizer 30, reactor and ammonia-gas spraying device 40, instead
Answer and in device, be provided with SCR catalyst layer 50.The present invention is provided with the channel unit of four groups of control flue gases, Unit respectively I, II list
Unit, Unit III, Unit IV, each channel unit is arranged in the front end of inside reactor, and channel unit is arranged in same plane two-by-two
On, it is distributed in altogether in two planes, two plane included angles are in 90 °, orthogonal.Mutually separate between each channel unit, respectively
It is configured with independent gas channel, each channel unit rear portion is separated by dividing plate.Each channel unit rear portion, is correspondingly provided with maintenance envelope
Close baffle plate, subdivision is arranged.
As shown in Fig. 2 each channel unit is provided with the water conservancy diversion fairing (structure such as embodiment one) of six same specifications, six
Individual water conservancy diversion fairing is arranged in parallel, and in the same plane (i.e. the drive end of rotating shaft be located at homonymy, each rotating shaft be located at same
In plane, remaining is same), by framework 5, six water conservancy diversion fairings are linked into an integrated entity.In Fig. 3, each water conservancy diversion fairing turns
Six groups of stators are installed on axle, it is in 180 ° of blades 2 arranging that every group of stator includes two.Controlled respectively often by respective axle sleeve 3
The rotation of individual stator.Six groups of axle sleeves of each water conservancy diversion fairing are connected with drive system respectively, and drive system is by Based Intelligent Control
System is controlled.The drive end of six water conservancy diversion fairing bottom bracket axles is respectively positioned on left side.
In this example, maintenance locking device 20 is set in the bottom of reactor, primary structure is maintenance closed guard, and right
Should each channel unit arrange, can be by closed-cell, by unit maintenance.
The present invention is further described below：
Structure composition：The water conservancy diversion fairing of each channel unit is made up of some groups of stators, and water conservancy diversion fairing is by many
Individual coaxial mounted blade strings together shape face；Coaxial stator can be driven respectively by multiple rotatable axle sleeves, realizes coaxial
The regulation of multiple-blade difference angle；Multiple shaft sleeves stator combinative structure, you can achieve channel unit and whole SCR reactor section
Regulation, specifically which blade adjustments need with reference to multiple spot flow velocity or pressure gauge automatic control control realization；Adjusted by stator
Section, achievable flue gas flow is adjusted, and all stators of close passage unit then block the section of whole channel unit, and seals
When rely on blade junction foil thermal expansion crush seal.
Mounting arrangements：Channel unit in the present invention, can be a unit or multiple unit, and channel unit can be installed
In SCR reactor inlet flue, also may be installed reactor Inner Front End, play the effect of passage control, specifically visual place
Space subdivision preferred arrangement.And each passage list can be configured with independent gas channel, that is, by flue or reactor
It is divided into multiple space cells, to realize controlling respectively, to meet full load, 80% load, bearing situations such as 50% load more
Lotus controls.Or by each channel unit integral arrangement it is adaptable to mini-plant in a gas channel, for Balance route cigarette
The flow of gas.
The function declaration of each structure：
1) the water conservancy diversion fairing adopting between different channel units enters row of channels switching；Can also be adjusted to realize
Flue gas in passage and between each passage evenly distributes；Design water conservancy diversion fairing can turn off gear as the entrance of unit channel
Plate is it is also possible to flow straightening grid as denitration.
2) after SCR catalytic reactor unit setting maintenance locking device, by turn off baffle plate form, generally for
Normally opened, just closing only when needing on-bne repair needs the passage of maintenance, and the baffle plate of this device needs to determine with reference to load variations
Phase alternation switch, to prevent dust stratification.
3), when multichannel unit is each independently arranged, the form of fracture of each passage can be designed to justify in conjunction with place situation
The forms such as shape, square, rectangle.
4) according to unit load determine open and close denitration port number, or select suitable cross-section passage it can be ensured that
Optimal operating condition during denitration, realizes system energy-saving safe and runs.Avoid leading to catalyst layer to wash away because flue gas flow rate is too fast
Abrasion problem, solve underload flue gas flow rate too slowly block up ash, and ammonia emitted dose be difficult to control to, the escaping of ammonia the problems such as.
5) unit higher to year hours of operation, it is possible to achieve on-bne repair.By many setting channel unit quantity, or
Build the coupling scale denitration channel unit of combination in conjunction with load, when denitrating system goes wrong, only need to stop in load down
Corresponding failure passage overhauls, and can realize on-bne repair in the case of without blowing out.
6) during underload can by adjust unit operation, especially segmentation re-heat economizer part operate to ensure that denitration
The minimum operating temperature of operation demand is it is also possible to permissible when reheat machine guarantees underload by setting up on passage portion unit
Gametic fertility.
7) in the present invention water conservancy diversion fairing design, can achieve to flue gas flow rate velocity field, concentration field, temperature field etc. flow
Field effectively adjusts in real time it is ensured that even flow field, promotes denitration reaction to carry out, is effectively reduced unreacted NOx and the escaping of ammonia, carries
High systematic function and reliability.
8) present invention can be taken using latticed multiple spot placement sensor respectively with sensors configured and intelligence control system
Sample, can achieve to flue gas denitration reactor cross-section temperature, flow rate speed field, NOx concentration field effective monitor in real time, Jin Ershi
The now Intelligent adjustment to blade, realizes more accurately controlling.
Claims (6)
1. a kind of multi-functional full load scope intelligent flue gas denitrating system, is characterized in that：At least include the logical of two groups of control flue gases
Road unit, this channel unit be arranged in SCR reactor inlet flue or reactor front end, each channel unit is arranged in same
In plane or be connected with each other arrangement multiple planes on, each channel unit is provided with one or more water conservancy diversion fairings, each lead to
When having multiple water conservancy diversion fairing in road unit, then arrange at grade；Water conservancy diversion fairing is adopted between each channel unit
The flue gas entering between row of channels switching or each passage of regulation evenly distributes, and opens and closes channel unit according to unit load situation
Quantity；Mutually separate between each channel unit, be each configured with independent gas channel, or by each channel unit entirety cloth
Put in a gas channel；Each water conservancy diversion fairing includes a rotating shaft, and some groups of stators being arranged in rotating shaft, often
Group stator is arranged on an axle sleeve, and every group of stator includes two blades, and two blades are in 180 ° and are relatively located on its axle sleeve, each axle sleeve
Be sleeved on successively in described rotating shaft, after installation each group stator along shaft length direction successively arranged adjacent in rotating shaft, and each axle
The drive end of set is located at the homonymy of rotating shaft.
2. multi-functional full load scope intelligent flue gas denitrating system according to claim 1, is characterized in that：Before reactor
End is provided with the channel unit of four groups of control flue gases, and channel unit is located in a plane two-by-two, is distributed in altogether in two planes, and
Two planes are vertically arranged in 90, and each channel unit arranges six groups of water conservancy diversion fairings.
3. multi-functional full load scope intelligent flue gas denitrating system according to claim 2, is characterized in that：The axle of each group stator
In set, the axle sleeve from one group of farthest stator of drive end is directly sleeved in described rotating shaft, draws near and is successively set with, from driving
The axle sleeve holding one group of nearest stator is sleeved on outermost layer.
4. multi-functional full load scope intelligent flue gas denitrating system according to claim 3, is characterized in that：Set in described rotating shaft
There are 3～25 groups of stators, the length of blade of each stator is identical.
5. multi-functional full load scope intelligent flue gas denitrating system according to claim 4, is characterized in that：The edge of blade sets
There is sealing sheet；The side of blade is provided with flexible sealing strip or foil, and adjacent blades pass through this flexible sealing strip or metal
Thin slice matches.
6., according to the arbitrary described multi-functional full load scope intelligent flue gas denitrating system of claim 1-5, it is characterized in that：In SCR
Catalytic reactor bottom is provided with multigroup maintenance closed guard, mutually separates between each channel unit, is each configured with independent gas
Circulation road, mutually separates between each channel unit, is each configured with independent gas channel, each channel unit rear portion, point list
Unit's setting maintenance closed guard.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510325217.4A CN104959000B (en) | 2015-06-15 | 2015-06-15 | Multi-functional full load scope intelligent flue gas denitrating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510325217.4A CN104959000B (en) | 2015-06-15 | 2015-06-15 | Multi-functional full load scope intelligent flue gas denitrating system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104959000A CN104959000A (en) | 2015-10-07 |
| CN104959000B true CN104959000B (en) | 2017-03-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510325217.4A Active CN104959000B (en) | 2015-06-15 | 2015-06-15 | Multi-functional full load scope intelligent flue gas denitrating system |
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| CN (1) | CN104959000B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108905614A (en) * | 2018-08-16 | 2018-11-30 | 中国大唐集团科学技术研究院有限公司西北分公司 | A kind of guiding device and thermal power plant SCR method denitration flue gas even distribution system |
| CN110935312B (en) * | 2019-12-16 | 2022-08-30 | 广州珠江电力有限公司 | Dynamic monitoring device and dynamic monitoring method for SCR flue gas denitration system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4959650B2 (en) * | 2008-08-07 | 2012-06-27 | 三菱重工業株式会社 | Exhaust gas treatment apparatus and exhaust gas treatment system |
| CN202146712U (en) * | 2011-06-27 | 2012-02-22 | 南京龙源环保有限公司 | Smoke catalytic reduction denitration device capable of mixing uniformly, equalizing and guiding flow |
| CN103041702B (en) * | 2013-01-05 | 2014-07-23 | 中国计量学院 | SCR static mixer provided with artificial pine needle blades |
| CN103076151B (en) * | 2013-01-21 | 2015-05-27 | 山东大学 | Selective catalytic reduction (SCR) flue gas denitrification flow field cold state testing system and method |
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| Publication number | Publication date |
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| CN104959000A (en) | 2015-10-07 |
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Address after: 210031 Pudong Road, Pukou District, Jiangsu, No. 10, No. Patentee after: National Electric Environmental Protection Research Institute Co., Ltd. Address before: 210031 Pudong Road, Pukou District, Jiangsu, No. 10, No. Patentee before: State Power Environmental Protection Research Institute |
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