CN104959000A - Multifunctional full-load-range intelligent flue gas denitrification system - Google Patents
Multifunctional full-load-range intelligent flue gas denitrification system Download PDFInfo
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- CN104959000A CN104959000A CN201510325217.4A CN201510325217A CN104959000A CN 104959000 A CN104959000 A CN 104959000A CN 201510325217 A CN201510325217 A CN 201510325217A CN 104959000 A CN104959000 A CN 104959000A
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- flue gas
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Abstract
The invention provides a multifunctional full-load-range intelligent flue gas denitrification system. The multifunctional full-load-range intelligent flue gas denitrification system comprises at least two channel units for controlling flue gas, wherein the channel units are arranged in an entrance flue of an SCR (silicon controlled rectifier) reactor or at the front end of the reactor and are arrayed on the same plane or are connected to one another and are arrayed on a plurality of planes; each channel unit is provided with one or a plurality of flow guiding and distributing devices; and when each channel unit is provided with a plurality of flow guiding and distributing devices, the channel units are arrayed on the same plane. The multifunctional full-load-range intelligent flue gas denitrification system is provided with one or more than one channel unit, the channel units are provided with the flow guiding and distributing devices with guiding vane structures, and after the design is applied to the flue gas denitrification system, balanced control of flow of flue gas is facilitated. Flow fields such as temperature fields, speed fields and concentration fields in the flue gas denitrification system can be uniformly controlled, so that the denitrification performance is improved.
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 oxide is as one of the Air Pollutants of global priority control, it is one of key component causing acid rain and photochemical fog, various coal-burning boiler, industrial furnace is one of its main emission source, there is many technical bottlenecks in the application in flue gas denitrification system (SCR) as current main-stream control technology, especially during underload, flue gas blocks in catalyst through the low ash-laden gas that easily causes of denitration SCR reactor flow velocity, the problems such as the escaping of ammonia, or the low denitration performance of temperature is poor, be not suitable for gametic fertility, place anxiety is transformed after part transformation project stove, cannot integral arrangement denitration facility.China's coal unit load variations is frequent, and many fired power generating unit participate in peak load regulation network, and especially peak regulation is frequent, and even the unit load excursion of degree of depth peak regulation is larger, and peak regulation frequency is secondary more, causes denitration facility operational percentage low.In addition, the existence of the unequal situation in flow field such as temperature field, velocity field, concentration field in flue gas denitrification system, causes regional temperature, flow velocity, concentration various dimensions field uneven, and then causes denitration performance difference to be also common problem.
The appearance of newly advising along with serial environmental protection such as environmental protection new-standards, particularly emission limit is implemented, and the control overflow of NOx becomes tight more, has higher requirement in the NO_x Reduction by Effective of coal unit within the scope of full load, operational percentage guarantee, high-adaptability etc.
summary of the invention:
For solving prior art Problems existing, the present invention proposes a kind of multi-functional full load scale fume denitrating system.
The object of the invention realizes by the following technical solutions:
A kind of multi-functional full load scale fume denitrating system, at least comprise the channel unit that two groups control flue gas, this channel unit is arranged in SCR reactor inlet flue or the front end of reactor, each channel unit is arranged at grade or is interconnected in the multiple plane of arrangement, each channel unit is provided with one or more water conservancy diversion fairing, if there is multiple water conservancy diversion fairing in each channel unit, then arrange at grade.
Further design of the present invention is:
Be provided with four groups in the front end of reactor and control the channel unit of flue gases, channel unit is positioned in a plane between two, is distributed in altogether in two planes, and two planes are 90 vertically to arrange, and each channel unit arranges six groups of water conservancy diversion fairings.
Described water conservancy diversion fairing comprises a rotating shaft, with the some groups of stators be arranged in rotating shaft, often organize stator and be arranged on an axle sleeve, often organize stator and comprise two blades, two blades are 180 ° and are relatively located on its axle sleeve, each axle sleeve is sleeved in described rotating shaft successively, respectively organize stator along shaft length direction successively arranged adjacent in rotating shaft, and the drive end of each axle sleeve is positioned at the homonymy of rotating shaft after installing.
In the axle sleeve of each group of stator, the axle sleeve from drive end one group of stator farthest is directly sleeved in described rotating shaft, draws near and is successively set with, and the axle sleeve from the nearest one group of 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 sheet metal, and adjacent blades is matched by this flexible sealing strip or sheet metal.
Each channel unit is configured with independently gas channel respectively, or all channel unit integral arrangement are in a gas channel.
Many group maintenance closed guards are provided with in SCR catalytic reactor bottom.
the present invention compared to existing technology tool has the following advantages:
1, arrange one or more channel unit in the present invention, channel unit adopts the guide vane structure of water conservancy diversion fairing, and this design ap-plication, in flue gas denitrification system, is beneficial to the Balance route of flue gas flow.The equal control in the flow fields such as temperature field in flue gas denitrification system, velocity field, concentration field can be realized, to improve denitration performance.
2, system of the present invention meets the requirement of the aspects such as coal unit many loads NO_x Reduction by Effective, high-adaptability.
3, in the present invention, water conservancy diversion fairing is connected in series by some blades, and the often group stator in rotating shaft can lead to rotary sleeve and drive, and realizes the adjustment of coaxial multiple-blade different angles.
4, in the present invention, water conservancy diversion fairing can be arranged on SCR reactor inlet flue, also can be arranged on reactor Inner Front End, space, concrete visual place subdivision preferred arrangement.By the structure of multiple-blade concatenation type, the adjustment of unit channel and whole SCR reactor section can be realized.This device can realize the homogenization function of velocity field, concentration field, various dimensions field, temperature field, is beneficial to type smoke pollutant removal.
5, in the present invention, stator is 180 degree of settings by two blades, can realize flue gas various flow rate and control, can realize each stator unitary closed when coaxially closing, and realizes flue section and turns off shutoff.
6, drive system is used for the driving that rotating shaft drives axle sleeve, and the adjustment angle often organizing stator, at 0-360 degree or 0-180 degree, can adopt electronic, also can adopt pneumatic or hydraulic-driven.Each gate positing is adjustable, also can be positioned at same position, open or close passage simultaneously, during sealing, and the sheet metal thermal expansion crush seal of each blade side.
accompanying drawing illustrates:
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-sheet metal; 5-framework; 10-microplate blade string; 20-overhauls locking device; 30-segmentation economizer; 40-ammonia-gas spraying device; 50-SCR catalyst layer;
detailed description of the invention:
Below in conjunction with accompanying drawing, the invention will be further described.
embodiment one:
As shown in Figure 4, Figure 5, a kind of water conservancy diversion fairing, the some groups of stators comprising rotating shaft 1 and be arranged in rotating shaft 1, often organizing stator is arranged on an axle sleeve 3, often organize stator and comprise two blades 2, two blades are 180 ° and are relatively located on its axle sleeve 3, each axle sleeve is sleeved in described rotating shaft 1 successively, after installing each group stator along shaft length direction successively arranged adjacent in rotating shaft 1, and the drive end of each axle sleeve is positioned at the homonymy of rotating shaft 1, so that drive, in figure, the axle sleeve drive end of each blade is all positioned at left side.Preferably 6(3 ~ 25 group are had in figure) group stator, the length of blade of each stator is identical, often organizes stator different from the relative position of rotating shaft in figure.
In the axle sleeve of each group of stator, the axle sleeve from drive end one group of stator farthest is directly sleeved in described rotating shaft 1, draws near and is successively set with, and the axle sleeve from the nearest one group of stator of drive end is sleeved on outermost layer.Like this by tandem in a rotating shaft for each group of stator.
The edge of blade 2 is provided with sealing sheet 4, to realize good closedown effect.
The side of blade is provided with flexible sealing strip or sheet metal, and adjacent blades is matched by this flexible sealing strip or sheet metal, to realize opposing seal.
Rotation adjustment for staggered stator series rotary axle box drives, and adjustment angle 0-360 degree or 0-180 degree, drive system can adopt electronic, also can adopt pneumatic or hydraulic-driven.
embodiment two:
As shown in Figure 1, flue gas denitrification system mainly comprises boiler, segmentation re-heat economizer 30, reactor and ammonia-gas spraying device 40, is provided with SCR catalyst layer 50 in reactor.The present invention is provided with the channel unit that four groups control flue gas, be respectively Unit I, Unit II, Unit III, Unit IV, each channel unit is arranged in the front end of inside reactor, channel unit arrangement between two at grade, be distributed in two planes altogether, two plane included angles are 90 °, orthogonal.Mutually separate between each channel unit, be configured with independently gas channel respectively, each channel unit rear portion is separated by dividing plate.Each channel unit rear portion, correspondence is provided with maintenance closed guard, and subdivision is arranged.
As shown in Figure 2, each channel unit is provided with the water conservancy diversion fairing (structure is as embodiment one) of six same specifications, six water conservancy diversion fairings are arranged in parallel, and in the same plane (i.e. the drive end of rotating shaft is positioned at homonymy, each rotating shaft is in the same plane, all the other are same), by framework 5, six water conservancy diversion fairings are linked into an integrated entity.In Fig. 3 each water conservancy diversion fairing rotating shaft on six groups of stators are installed, often organize stator comprise two in 180 ° arrange blades 2.The rotation of each stator is controlled respectively by respective axle sleeve 3.Six groups of axle sleeves of each water conservancy diversion fairing are connected with drive system respectively, and drive system is controlled by intelligence control system.The drive end of six water conservancy diversion fairing bottom bracket axles is all positioned at left side.
In this example, arrange maintenance locking device 20 in the bottom of reactor, primary structure is maintenance closed guard, and corresponding each channel unit is arranged, and by closed-cell, can overhaul by unit.
of the present invention further illustrate as follows:
structure forms: eachthe water conservancy diversion fairing of channel unit is made up of some groups of stators, and water conservancy diversion fairing strings together shape face by multiple coaxial mounted blade; Coaxial stator can be driven respectively by multiple rotatable axle sleeve, realizes the adjustment of coaxial multiple-blade different angles; Multiple shaft sleeves stator combining structure, can achieve the adjustment of channel unit and whole SCR reactor section, and specifically which blade adjustments needs in conjunction with multiple spot flow velocity or device for pressure measurement automatic control control realization; Regulated by stator, flue gas flow can be realized and regulate, all stators of close passage unit, the then section of the whole channel unit of shutoff, and the sheet metal thermal expansion crush seal relying on blade junction during sealing.
mounting arrangements:channel unit in the present invention, can be a unit or multiple unit, channel unit can be arranged in SCR reactor inlet flue, also can be arranged on reactor Inner Front End, plays the effect that passage controls, space, concrete visual place subdivision preferred arrangement.And each passage list can be configured with independently gas channel, namely flue or reactor is divided into multiple space cell, to realize controlling respectively, to meet full load, 80% load, many spatial load forecasting of the situations such as 50% load.Or by each channel unit integral arrangement in a gas channel, be applicable to mini-plant, for the flow of Balance route flue gas.
the function declaration of each structure:
1) the water conservancy diversion fairing adopted between different channel units carries out passage bridge; Also the flue gas uniform distribution regulating to realize in passage and between each passage can be carried out; Design water conservancy diversion fairing can turn off baffle plate as the entrance of unit channel, also can as the flow straightening grid of denitration.
2) SCR catalytic reactor rear section unit arranges maintenance locking device, being made up of shutoff baffle plate, generally for often to open, only having the passage of just closing needs maintenance when needing on-bne repair, the baffle plate of this device needs in conjunction with the regular alternation switch of load variations, to prevent dust stratification.
3), when multichannel unit is independently arranged separately, the form of fracture of each passage in conjunction with place situation, can be designed to the forms such as circle, square, rectangle.
4) determine according to unit load the port number opening and closing denitration, or select the passage of suitable cross-section, the operating condition of the best during denitration can be guaranteed, realize security of system energy-saving run.Avoid the problem causing catalyst layer erosive wear because flue gas flow rate is too fast, solve underload flue gas flow rate stifled ash too slowly, and ammonia emitted dose is difficult to the problems such as control, the escaping of ammonia.
5) higher to year hours of operation unit, can be implemented in line maintenance.By arranging channel unit quantity, or building the coupling scale denitration channel unit of combination in conjunction with load more, when denitrating system goes wrong, only need stop the maintenance of corresponding failure passage when load down, can when realizing on-bne repair without the need to when blowing out.
6) during underload by adjustment unit operation, especially the operation of segmentation re-heat economizer part is to guarantee the minimum operating temperature of denitration operation demand, also can by setting up reheat machine and guarantee underload on passage portion unit time can gametic fertility.
7) design of water conservancy diversion fairing in the present invention, can realize effectively regulating in real time flow fields such as flue gas flow rate velocity field, concentration field, temperature fields, guarantee even flow field, promote that denitration reaction carries out, unreacted NOx and the escaping of ammonia be can effectively reduce, systematic function and reliability improved.
8) the present invention can sensors configured and intelligence control system, latticed multiple spot placement sensor is adopted to sample respectively, the monitoring effectively in real time to flue gas denitration reactor cross-section temperature, flow rate speed field, NOx concentration field can be realized, and then the Intelligent adjustment realized blade, realize controlling comparatively accurately.
Claims (8)
1. a multi-functional full load scale fume denitrating system, it is characterized in that: at least comprise the channel unit that two groups control flue gas, this channel unit is arranged in SCR reactor inlet flue or the front end of reactor, each channel unit is arranged at grade or is interconnected in the multiple plane of arrangement, each channel unit is provided with one or more water conservancy diversion fairing, when having multiple water conservancy diversion fairing in each channel unit, then arrange at grade.
2. multi-functional full load flue gas denitrification system according to claim 1, it is characterized in that: be provided with the channel unit that four groups control flue gas in the front end of reactor, channel unit is positioned in a plane between two, be distributed in two planes altogether, and two planes are 90 vertically to arrange, each channel unit arranges six groups of water conservancy diversion fairings.
3. multi-functional full load flue gas denitrification system according to claim 1 or 2, it is characterized in that: described water conservancy diversion fairing comprises a rotating shaft, with the some groups of stators be arranged in rotating shaft, often organize stator and be arranged on an axle sleeve, often organize stator and comprise two blades, two blades are 180 ° and are relatively located on its axle sleeve, and each axle sleeve is sleeved in described rotating shaft successively, respectively organize stator after installing along shaft length direction successively arranged adjacent in rotating shaft, and the drive end of each axle sleeve is positioned at the homonymy of rotating shaft.
4. multi-functional full load flue gas denitrification system according to claim 3, it is characterized in that: in the axle sleeve of each group stator, axle sleeve from drive end one group of stator farthest is directly sleeved in described rotating shaft, draws near and is successively set with, and the axle sleeve from the nearest one group of stator of drive end is sleeved on outermost layer.
5. multi-functional full load flue gas denitrification system according to claim 4, is characterized in that: described rotating shaft is provided with 3 ~ 25 groups of stators, and the length of blade of each stator is identical.
6. multi-functional full load flue gas denitrification system according to claim 5, is characterized in that: the edge of blade is provided with sealing sheet; The side of blade is provided with flexible sealing strip or sheet metal, and adjacent blades is matched by this flexible sealing strip or sheet metal.
7. multi-functional full load flue gas denitrification system according to claim 1, it is characterized in that: each channel unit is configured with independently gas channel respectively, or all channel unit integral arrangement is in a gas channel.
8. multi-functional full load flue gas denitrification system according to claim 1, is characterized in that: be provided with many group maintenance closed guards in SCR catalytic reactor bottom.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510325217.4A CN104959000B (en) | 2015-06-15 | 2015-06-15 | Multi-functional full load scope intelligent flue gas denitrating system |
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| CN201510325217.4A CN104959000B (en) | 2015-06-15 | 2015-06-15 | Multi-functional full load scope intelligent flue gas denitrating system |
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| CN104959000A true CN104959000A (en) | 2015-10-07 |
| CN104959000B CN104959000B (en) | 2017-03-08 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN110935312A (en) * | 2019-12-16 | 2020-03-31 | 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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| 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 |
| CN103041702A (en) * | 2013-01-05 | 2013-04-17 | 中国计量学院 | SCR static mixer provided with artificial pine needle blades |
| CN103076151A (en) * | 2013-01-21 | 2013-05-01 | 山东大学 | Selective catalytic reduction (SCR) flue gas denitrification flow field cold state testing system and method |
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2015
- 2015-06-15 CN CN201510325217.4A patent/CN104959000B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010016392A1 (en) * | 2008-08-07 | 2010-02-11 | 三菱重工業株式会社 | Apparatus for treating discharge gas and system for treating discharge gas |
| 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 |
| CN103041702A (en) * | 2013-01-05 | 2013-04-17 | 中国计量学院 | SCR static mixer provided with artificial pine needle blades |
| CN103076151A (en) * | 2013-01-21 | 2013-05-01 | 山东大学 | Selective catalytic reduction (SCR) flue gas denitrification flow field cold state testing system and method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN110935312A (en) * | 2019-12-16 | 2020-03-31 | 广州珠江电力有限公司 | Dynamic monitoring device and dynamic monitoring method for SCR flue gas denitration 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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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 |