CN101642678A - Cascading type rectifier used for SCR denitration device - Google Patents
Cascading type rectifier used for SCR denitration device Download PDFInfo
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- CN101642678A CN101642678A CN200910104733A CN200910104733A CN101642678A CN 101642678 A CN101642678 A CN 101642678A CN 200910104733 A CN200910104733 A CN 200910104733A CN 200910104733 A CN200910104733 A CN 200910104733A CN 101642678 A CN101642678 A CN 101642678A
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Abstract
The invention discloses a cascading type rectifier used for SCR denitration device, comprising an upper rectifying plate and a lower rectifying plate that are laminated together; wherein the upper rectifying plate is provided with a plurality of regular spread rectifying holes I penetrating the upper rectifying plate body, the lower rectifying plate is provided with rectifying holes II which correspond to the rectifying holes I and penetrates the lower rectifying plate body, the rectifying holes I and the rectifying holes II are partially laminated in vertical direction, and the laminated partforms a plurality of rectifying channels vertically penetrating the rectifier body. The rectifier is formed by adopting the upper and lower rectifying plates, and a plurality of rectifying channels are formed through overlap of the rectifying holes opened on the upper and lower rectifying plates in different directions, thus not only the effect of uniform smoke movement is achieved but also manufacturing cost can be saved.
Description
Technical field
The present invention relates to the flue gases purification field, particularly a kind of cascading type rectifier that is used for the SCR denitration device.
Background technology
It is the country of main energy sources with coal that China is one, and coal fired power generation is one of most important approach of coal in China utilization.According to the national conditions of China, 21st century coal fired power generation will occupy an leading position.In numerous atmosphere pollutions of coal-fired fired power generating unit discharging, SO
2And dust is bigger to the harm of environment, is the major pollutants that will control.Along with the progress and the expanding economy of society, thermal power plant has been subjected to people's common concern to the pollution of atmospheric environment, and therefore effectively reducing pollutant emission is the severe challenge that China's energy field sustainable development is faced with the influence that improves environment.
Present main commercialization gas denitrifying technology comprises selectivity catalysis, and (the SCR technology has most effective for Selective CatalyticReduction, SCR) technology, can satisfy the strictest environmental regulation requirement, and the market demand will constantly enlarge.In the equipment for denitrifying flue gas that present stage is used, the SCR technology accounts for the overwhelming majority, so the SCR technology is considered at present and even interior quite over a long time from now on topmost gas denitrifying technology.
Flue gas denitration reactor in this technology (seeing Figure of description 1); comprise Reactor inlet (1) and import department's baffle door (2); baffle door (2) back is furnished with deflector (3); horizontally disposed ammonia-spraying grid (4) is arranged at deflector top; be used for spraying into the reducing agent of denitration reaction; the flue gas that contains reducing agent enters reactor behind deflector (5) and rectifier (6); be furnished with multi-layer catalyst (7) in the reactor; for catalyst is changed conveniently; through regular meeting one deck catalyst position is set in reactor, as the preparing catalyst layer more.Described catalyst is very high to the requirement of flue gas flow field, the velocity of flue gas that requires to enter catalyst evenly and also direction enter vertically downward, deflector (5) is arranged for the water conservancy diversion flue gas just with rectifier (6).It is the grid-like steel plate of foursquare cuboid that the many employings of rectifier (6) evenly are arranged to the flow of flue gas Region Segmentation is become the fritter import for one whole section, retrains the flue gas that enters reactor.This traditional rectifier is saved on cost inadequately owing to adopt one section steel plate rectifier, in a single day damages simultaneously and the monoblock steel plate can only be replaced, and could continue to use.
Summary of the invention
In view of this, the invention provides a kind of cascading type rectifier of the SCR of being used for denitration device, this rectifier adopts two cowling panels compositions up and down, by some rectification passages of overlapped formation on the cowling panel up and down that is opened in staggered stack, not only reach the effect of even flow of flue gas, can also save manufacturing cost.
The object of the present invention is to provide a kind of cascading type rectifier of the SCR of being used for denitration device, described rectifier comprises last cowling panel stacked together and following cowling panel, described upward cowling panel is provided with the rectification hole I of cowling panel plate body in some the regular perforations of arranging, described down cowling panel be provided with the corresponding perforation of rectification hole I under the rectification hole II of cowling panel plate body, described rectification hole I and rectification hole II are overlapped in vertical direction, and overlapping part forms many rectification passages that vertically run through the rectifier body.
Further, described rectification hole I adopts oblique layout or horizontally disposed mode to be arranged on the cowling panel, and rectification hole II adopts corresponding with it oblique layout or horizontally disposed mode to be arranged at down on the cowling panel;
Further, described rectification hole I and rectification hole II are rectangle, fusiformis or bar shaped;
Further, the described identical and big or small unanimity of area that goes up cowling panel and following cowling panel;
Further, the described cowling panel of going up is rectangular slab with following cowling panel;
Further, described rectification hole I comprises a plurality of big or small unanimities and equally distributed square hole I, described rectification hole II comprises that square hole II, the area consistent with square hole I shape equal the little square hole of 1/4 square II and the slot that area equals 1/2 square hole II, wherein, described square hole II evenly is arranged at down the middle part of cowling panel, described little square hole is separately positioned on down four jiaos of cowling panel, and described slot is horizontally installed between the adjacent little square hole;
Further, described square hole I, square hole II, little square hole and slot are separated to form by adjacent steel bar, and the length of side span of described square hole I and square hole II is 50mm～200mm;
Further, the length of side value of described square hole I and square hole II is 150mm;
Further, as another kind of arrangement, last cowling panel 1 adopts sieve texture, the described integral body that goes up cowling panel 1 evenly is separated into a plurality of rectification hole I 3 by steel bar, rectification hole I 3 is a slot, and the width of rectification hole I 3 that wherein is arranged on cowling panel 1 two ends is less than the rectification hole I 3 that is arranged on cowling panel 1 middle part; The integral body of following cowling panel 2 is evenly divided into a plurality of rectification hole II 4 by parallel steel bar, the length of rectification hole II 4 is identical or approaching with the width of the rectification hole I 3 at last cowling panel 1 middle part, when last cowling panel 1 and following cowling panel 2 are overlapping, in vertical direction, can form many rectification passages;
Further, described go up cowling panel I and following cowling panel II by thickness less than the steel bar of 1cm arrange in length and breadth, integral solder forms.
The invention has the beneficial effects as follows:
1. the present invention is by the mode of staggered stack, make the rectification effect that can reach former rectifier than the twice rectifier in former aperture, can save almost half material simultaneously again, also reduced the overall weight of rectifier, reduce the intensity of required support, thereby saved manufacturing cost;
2. the present invention adopts the structure of upper and lower cowling panel, when any therein cowling panel is damaged, can changes easily, thereby save production cost indirectly.
Other advantages of the present invention, target, to set forth in the following description to a certain extent with feature, and to a certain extent,, perhaps can obtain instruction from the practice of the present invention based on being conspicuous to those skilled in the art to investigating hereinafter.Target of the present invention and other advantages can realize and obtain by following specification and claims.
Description of drawings
In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with accompanying drawing, wherein:
Fig. 1 is traditional denitrating flue gas structure of reactor schematic diagram;
Fig. 2 is the last cowling panel structural representation of embodiments of the invention one;
Fig. 3 is the following cowling panel structural representation of embodiments of the invention one;
Fig. 4 is the stacked schematic diagram of upper and lower cowling panel of embodiment one;
Fig. 5 is the last cowling panel structural representation of embodiment two;
Fig. 6 is the following cowling panel structural representation of embodiments of the invention two;
Fig. 7 is the stacked schematic diagram of upper and lower cowling panel of embodiment two;
Fig. 8 is the structural representation of embodiment three.
The specific embodiment
Hereinafter with reference to accompanying drawing, the preferred embodiments of the present invention are described in detail.Should be appreciated that preferred embodiment only for the present invention is described, rather than in order to limit protection scope of the present invention.
Embodiment one
The cascading type rectifier that is used for the SCR denitration device of the present invention, comprise last cowling panel stacked together 1 and following cowling panel 2, the 1 rectification hole I 3 that is provided with cowling panel plate body in the perforations that some rules arrange on the last cowling panel, following cowling panel 2 be provided with rectification hole I 3 corresponding perforations under the rectification hole II 4 of cowling panel plate body, rectification hole I 3 and rectification hole II 4 are overlapped in vertical direction, overlapping part forms many rectification passages that vertically run through the rectifier body, in the present embodiment, identical and the big or small unanimity of area of last cowling panel 1 and following cowling panel 2 is rectangular slab;
As shown in Figure 2, rectification hole I 3 comprises a plurality of big or small unanimities and the equally distributed square hole I 31 of level, as shown in Figure 3, rectification hole II 4 comprises that square hole II 41, the area consistent with square hole I 31 shapes equal the little square hole 42 of 1/4 square II 41 and the slot 43 that area equals 1/2 square hole II 41, wherein, square hole II 41 evenly is arranged at down the middle part of cowling panel, little square hole 42 is separately positioned on down four jiaos of cowling panel, and slot 43 is horizontally installed between the adjacent little square hole 42.
As shown in Figure 4, will go up cowling panel 1 and following cowling panel 2 corresponding overlapping after, for any one complete square hole I, the II on two plates, can both form four rectification passages 5 that vary in size in vertical direction.
In the present embodiment, square hole I 31, square hole II 41, little square hole 42 and slot 43 are separated to form by adjacent steel bar, and the length of side value of square hole I 31 and square hole II 41 is 150mm.
The rectifier that adopts this kind design to make, it is made the comparable traditional structure of raw material and saves 30%～50%, and rectification effect is unaffected.
Embodiment two
In the present embodiment, last cowling panel 1 and following cowling panel 2 be the identical and overlapping rectangle in four limits and arrange in length and breadth less than the steel bar of 1cm by thickness when stacked for area still, integral solder forms, wherein, as shown in Figure 5, last cowling panel 1 adopts sieve texture, the integral body of last cowling panel 1 evenly is separated into a plurality of rectification hole I3 by steel bar, as seen from the figure, rectification hole I 3 is a slot, the specification of rectification hole I 3 has two kinds, the width of rectification hole I 3 that wherein is arranged on down cowling panel 2 two ends is less than the rectification hole I 3 that is arranged on down cowling panel 2 middle parts, and in the present embodiment, the width of the rectification hole I 3 at two ends approximates half of width of the rectification hole I 3 at middle part; As shown in Figure 6, the integral body of following cowling panel 2 is evenly divided into a plurality of rectification hole II 4 by parallel steel bar, in the present embodiment, the length of rectification hole II 4 is identical with the width of the rectification hole I 3 at last cowling panel 1 middle part, as shown in Figure 7, when last cowling panel 1 and following cowling panel 2 are overlapping, in vertical direction, can form many rectification passages.
Embodiment three
(the little square frame of the solid line among the figure is represented rectification hole I as shown in Figure 8, the little square frame of dotted line is represented rectification hole II, dash area is represented the rectification passage), embodiment two is with the difference of implementing one, rectification hole I 3 and rectification hole II 4 are oblique layout, wherein, same direction along horizontal plane, rectification hole I 3 adopts 45 ° of settings of left bank, rectification hole II 4 adopts 45 ° of settings of right bank, on the last cowling panel arbitrarily on two rectification hole I 3 and the following cowling panel two corresponding rectification hole II 4 overlap at two ends the corresponding rectification passage that forms four rhombuses in vertical direction.
Need to prove, mentioned in this article go up cowling panel and following cowling panel " on ", D score just comparatively speaking, in fact, in actual use, do not influence use of the present invention above concrete which piece of last cowling panel and following cowling panel places.
Explanation is at last, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement technical scheme of the present invention, and not breaking away from the aim and the scope of the technical program, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (10)
1. the cascading type rectifier that is used for the SCR denitration device, it is characterized in that: described rectifier comprises last cowling panel stacked together and following cowling panel, described upward cowling panel is provided with the rectification hole I of cowling panel plate body in some the regular perforations of arranging, described down cowling panel be provided with the corresponding perforation of rectification hole I under the rectification hole II of cowling panel plate body, described rectification hole I and rectification hole II are overlapped in vertical direction, and overlapping part forms many rectification passages that vertically run through the rectifier body.
2. the cascading type rectifier that is used for the SCR denitration device according to claim 1, it is characterized in that: described rectification hole I adopts oblique layout or horizontally disposed mode to be arranged on the cowling panel, and rectification hole II adopts corresponding with it oblique layout or horizontally disposed mode to be arranged at down on the cowling panel.
3. the cascading type rectifier that is used for the SCR denitration device according to claim 2 is characterized in that: described rectification hole I and rectification hole II are rectangle, fusiformis or bar shaped.
4. the cascading type rectifier that is used for the SCR denitration device according to claim 3 is characterized in that: the described identical and big or small unanimity of area that goes up cowling panel and following cowling panel.
5. the cascading type rectifier that is used for the SCR denitration device according to claim 4 is characterized in that: the described cowling panel of going up is rectangular slab with following cowling panel.
6. the cascading type rectifier that is used for the SCR denitration device according to claim 5, it is characterized in that: described rectification hole I comprises a plurality of big or small unanimities and equally distributed square hole I, described rectification hole II comprises the square hole II consistent with square hole I shape, area equals the little square hole of 1/4 square II and the slot that area equals 1/2 square hole II, wherein, described square hole II evenly is arranged at down the middle part of cowling panel, described little square hole is separately positioned on down four jiaos of cowling panel, and described slot is horizontally installed between the adjacent little square hole.
7. the cascading type rectifier that is used for the SCR denitration device according to claim 6, it is characterized in that: described square hole I, square hole II, little square hole and slot are separated to form by adjacent steel bar, and the length of side span of described square hole I and square hole II is about 50mm～200mm.
8. the cascading type rectifier that is used for the SCR denitration device according to claim 7 is characterized in that: the length of side value of described square hole I and square hole II is 150mm.
9. the cascading type rectifier that is used for the SCR denitration device according to claim 5, it is characterized in that: go up cowling panel 1 and adopt sieve texture, the described integral body that goes up cowling panel 1 evenly is separated into a plurality of rectification hole I3 by steel bar, rectification hole I3 is a slot, and the width of rectification hole I3 that wherein is arranged on cowling panel 1 two ends is less than the rectification hole I3 that is arranged on cowling panel 1 middle part; The integral body of following cowling panel 2 is evenly divided into a plurality of rectification hole II4 by parallel steel bar, the length of rectification hole II4 is identical or approaching with the width of the rectification hole I3 at last cowling panel 1 middle part, when last cowling panel 1 and following cowling panel 2 are overlapping, in vertical direction, can form many rectification passages.
10. according to claim 6 or the 9 described cascading type rectifiers that are used for the SCR denitration device, it is characterized in that: described go up cowling panel I and following cowling panel II by thickness less than the steel bar of 1cm arrange in length and breadth, integral solder forms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101047339A CN101642678B (en) | 2009-08-28 | 2009-08-28 | Cascading type rectifier used for SCR denitration device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009101047339A CN101642678B (en) | 2009-08-28 | 2009-08-28 | Cascading type rectifier used for SCR denitration device |
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| CN101642678A true CN101642678A (en) | 2010-02-10 |
| CN101642678B CN101642678B (en) | 2011-08-17 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101829499A (en) * | 2010-05-18 | 2010-09-15 | 浙江大学 | SCR (Selective Catalytic Reduction) flue gas denitrification system with structure of optimized ammonia spraying device upstream fluid field |
| CN103436301A (en) * | 2013-09-13 | 2013-12-11 | 上海电力学院 | Combined dust removal and desulfurization system for coal gas |
| CN104624072A (en) * | 2015-02-11 | 2015-05-20 | 中国华能集团公司 | Flue gas premixing device and denitration reactor and method based on same |
| CN106110887A (en) * | 2016-08-25 | 2016-11-16 | 东方电气集团东方锅炉股份有限公司 | The accumulatingdust disturbing flow device with contour double-deck fairing for SCR denitration |
| CN106237839A (en) * | 2016-08-25 | 2016-12-21 | 东方电气集团东方锅炉股份有限公司 | Accumulatingdust disturbing flow device for the notch cuttype bilayer fairing of SCR denitration |
Family Cites Families (7)
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| DE3612218C1 (en) * | 1986-04-11 | 1987-08-20 | Steinmueller Gmbh L & C | Apparatus for uniformly impinging a catalyst bed with an exhaust gas to be purified |
| JP2637119B2 (en) * | 1987-11-12 | 1997-08-06 | バブコツク日立株式会社 | DeNOx reaction equipment |
| JP4053219B2 (en) * | 2000-07-28 | 2008-02-27 | バブコック日立株式会社 | Exhaust gas treatment apparatus having a rectifying structure |
| CN100528302C (en) * | 2006-04-29 | 2009-08-19 | 孙克勤 | Equipment for denitrifying flue gas with grille of spraying ammonia being setup underside of economizer of boiler |
| CN100569343C (en) * | 2007-08-24 | 2009-12-16 | 中电投远达环保工程有限公司 | Not blowing out can realize the device of sampling denitrating catalyst |
| CN101306325A (en) * | 2008-07-07 | 2008-11-19 | 北京博奇电力科技有限公司 | Flue gas even distribution device of selective catalytic reduction reaction denitration reactor |
| CN201572606U (en) * | 2009-08-28 | 2010-09-08 | 中电投远达环保工程有限公司 | Laminated rectifier for denitration equipment |
-
2009
- 2009-08-28 CN CN2009101047339A patent/CN101642678B/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101829499A (en) * | 2010-05-18 | 2010-09-15 | 浙江大学 | SCR (Selective Catalytic Reduction) flue gas denitrification system with structure of optimized ammonia spraying device upstream fluid field |
| CN103436301A (en) * | 2013-09-13 | 2013-12-11 | 上海电力学院 | Combined dust removal and desulfurization system for coal gas |
| CN104624072A (en) * | 2015-02-11 | 2015-05-20 | 中国华能集团公司 | Flue gas premixing device and denitration reactor and method based on same |
| CN106110887A (en) * | 2016-08-25 | 2016-11-16 | 东方电气集团东方锅炉股份有限公司 | The accumulatingdust disturbing flow device with contour double-deck fairing for SCR denitration |
| CN106237839A (en) * | 2016-08-25 | 2016-12-21 | 东方电气集团东方锅炉股份有限公司 | Accumulatingdust disturbing flow device for the notch cuttype bilayer fairing of SCR denitration |
| CN106237839B (en) * | 2016-08-25 | 2019-05-21 | 东方电气集团东方锅炉股份有限公司 | The accumulatingdust disturbing flow device of the double-deck fairing of step type for SCR denitration |
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| CN101642678B (en) | 2011-08-17 |
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