CN102240506A - Modular selective catalytic reduction (SCR) denitration rectification grating device - Google Patents
Modular selective catalytic reduction (SCR) denitration rectification grating device Download PDFInfo
- Publication number
- CN102240506A CN102240506A CN2011101361234A CN201110136123A CN102240506A CN 102240506 A CN102240506 A CN 102240506A CN 2011101361234 A CN2011101361234 A CN 2011101361234A CN 201110136123 A CN201110136123 A CN 201110136123A CN 102240506 A CN102240506 A CN 102240506A
- Authority
- CN
- China
- Prior art keywords
- sealing element
- rectification
- scr
- rectification module
- denitration
- 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.)
- Granted
Links
Images
Abstract
The invention belongs to the technical field of smoke denitration (namely NOx removal), and relates to a modular selective catalytic reduction (SCR) denitration rectification grating device, which is characterized in that longitudinal gratings and transverse gratings of rectification modules are in crossed connection mutually to be fixed and have a grid-shaped structure in which a plurality of hollow thin-wall pipes are arranged and connected regularly and mutually, and the axial directions of the hollow thin-wall pipes are consistent with the height directions of the rectification modules; a sealing element is divided into an internal sealing element and an external sealing element; the internal sealing element is positioned in gaps among the rectification modules; and the external sealing element is positioned between the rectification modules and the inner wall of an SCR reactor. The invention has the advantages that after smoke passes through the modular SCR denitration rectification grating device, the flow direction and flow speed distribution of the smoke mingled with dust achieve an ideal effect; meanwhile, the dust in the smoke cannot be accumulated on the rectification grating device; and the rectification grating device is easy to manufacture and low in comprehensive investment cost, and is not needed to be overhauled or maintained, the cost of materials is low, and the flow field performance of the smoke is improved, so the NOx removal performance of the system is improved.
Description
Technical field
The invention belongs to denitrating flue gas (being that NOx removes) technical field, relate in a kind of SCR of being applied to denitrating system, make flue gas and dust equally distributed modularization SCR denitration flow straightening grid device before entering catalyst layer.
Background technology
The NOx(nitrogen oxide) be one of main atmosphere pollution, nitrogen oxide is produced when the high-temp combustion by fossil fuel and air, comprises nitric oxide (NO), nitrogen dioxide (NO
2) and nitrous oxide (N
2O), also has NxOy.The SCR(selective catalytic reduction, Selective Catalytic Reduction is called for short SCR) denitration technology, be with certain density ammonia (NH
3) mix with flue gas in the spirt flue gas, in reactor through catalyst action, with NH
3Reaction generates nontoxic N with NOx
2And water, reach the purpose that removes NOx.Because moment took place when denitration reaction was flue gas contact solid catalyst surface, so the uniformity of the denitration performance of system and flue gas flow field and velocity flow profile have direct decisive relation.
The SCR denitration technology is owing to there is higher denitration efficiency, and the SCR method is adopted in most in the world at present power-plant flue gas denitrations.Be to arrange a large amount of difform deflectors generally speaking at SCR denitration inlet flue duct and reactor front end, make flue gas and dust flow distribution reach needed requirement, but from domestic and international installation and operating experience, because the SCR reactor cross section is big, and the catalyst stream field distributes and has relatively high expectations, the strange deflector fabrication and installation difficulty of different shape is very big, dust in the flue gas is as easy as rolling off a log simultaneously piles up in baffle surface, install and system operation cost thereby increase, denitration performance is also had a greatly reduced quality.
Summary of the invention
The objective of the invention is in order to overcome the defective of prior art, provide a kind of simple in structure, the flue gas flow field performance is good, efficient height easy for installation, material are saved the low modularization SCR denitration flow straightening grid device of cost.
For achieving the above object, the technical scheme that adopts is: modularization SCR denitration flow straightening grid device, comprise a plurality of rectification modules and the potted component that place in the described SCR reactor, it is characterized in that: vertical grid of described rectification module and the horizontal mutual interconnection of grid are fixed, be the fenestral fabric that the mutual proper alignment of a plurality of hollow and thin-walled pipes connects, be equipped with around fixing frame around the described rectification module, the axis direction of described hollow and thin-walled pipe is consistent with the rectification module short transverse; Potted component and outer sealing element in described potted component is divided into, the gap of interior potted component between described rectification module, outer sealing element is between rectification module and SCR reactor wall, potted component top is arrow shaped in described, outer sealing element top is half arrow shaped, described arrow and half arrow towards relative with flue gas flow direction.
The cross section of described hollow and thin-walled pipe is square, arranges welding by hollow and thin-walled pipe-space, space and fixes, and constitutes square net.
The material of described rectification module and potted component is metal material.
The invention has the beneficial effects as follows: modularization SCR denitration flow straightening grid device is positioned on the interior ground floor catalyst top brace summer of SCR reactor, make flue gas behind process modularization SCR denitration flow straightening grid device, before entering SCR reactor ground floor catalyst, the flue gas flow direction and the velocity flow profile that are mingled with dust reach ideal effect, flue gas flow rate distribution bias≤15%; The maximum deviation angle of flue gas flow direction and vertical direction is ± 15 °; Arrow shaped and half arrow shaped potted component can't be piled up the dust in the flue gas on the flow straightening grid device, improved the flue gas flow field performance, thereby have improved the performance that system removes NOx; The flow straightening grid of modularization SCR denitration simultaneously device fabrication and installation simple and fast, material is cheap, need not repair and maintenance, and comprehensive method of investment cost is low.
Description of drawings
The invention will be further described below in conjunction with the drawings and specific embodiments.
Fig. 1 is installation of the present invention and use location schematic diagram;
Fig. 2 is among Fig. 1
IThe structure for amplifying schematic diagram;
Fig. 3 be among Fig. 1 A of the present invention to structural representation;
Fig. 4 is among Fig. 3
IIThe local structure for amplifying schematic diagram of single rectification module;
Fig. 5 is inner seal liner structural representation (amplification);
Fig. 6 is outside seal may structural representation (amplification).
Among the figure: the 1-SCR reactor; The 2-rectification module; Potted component in the 3-; The 4-outer sealing element; The 5-frame; 6-hollow and thin-walled pipe; 7-first Catalytic Layer; The 8-brace summer; 9-flow straightening grid device installation site.
The specific embodiment
Fig. 1 is installation of the present invention and use location schematic diagram, diagram modularization SCR denitration flow straightening grid device is positioned over brace summer 8(Fig. 2 of the top of first Catalytic Layer 7 in the SCR reactor 1) on, be positioned at the front end 9 of SCR reactor 1, make flue gas behind process modularization SCR denitration flow straightening grid device, the flue gas flow direction and the velocity flow profile that are mingled with dust reach ideal effect.
Structure for amplifying of the present invention illustrates in Fig. 2～Fig. 4, as seen from the figure, vertical grid of described rectification module and the horizontal mutual interconnection of grid are fixed, be the fenestral fabric that a plurality of hollow and thin-walled pipe 6 mutual proper alignment connect, be equipped with whole corral around the described rectification module 2 around fixing frame 5, the axis direction of described hollow and thin-walled pipe 6 is consistent with rectification module 2 short transverses; Potted component 3 and outer sealing element 4 in described potted component is divided into, the gap of interior potted component 3 between described rectification module 2, outer sealing element 4 is between rectification module 2 and SCR reactor 1 inwall, potted component 3 tops are arrow shaped in described, the angle of drift angle d is no more than 100 ° of (see figure 5)s, outer sealing element 4 tops are half arrow shaped, and the slope of half arrow and vertical direction angle e are no more than 50 ° of (see figure 6)s, described arrow and half arrow towards relative with flue gas flow direction.Potted component 3 and outer sealing element 4 are formed by the compacting of 0.5-2mm thin plate in described.
Fig. 4 is the local structure for amplifying schematic diagram of single rectification module, and the cross section of diagram hollow and thin-walled pipe 6 is square.During actual the use, described rectification module 2 by 120～180 same sizes, wall thickness is the square hollow and thin-walled pipe 6 of 1.5-3.5mm, arrange the fixing composition of welding by hollow and thin-walled pipe-space, space, network is square, band " # " is labeled as the rectangular tube position among Fig. 4, band " x " is labeled as the space (space) of identical size, connects fixing with the 5 whole corral boxings of lamellar frame around the rectification module.Modularization SCR denitration flow straightening grid device is made up of along horizontal longitudinal direction proper alignment in SCR reactor 1 rectification module 2 of a plurality of identical sizes.The gap of interior potted component 3 between described rectification module 2, the gap of outer sealing element 4 between rectification module 2 and SCR reactor 1 inwall.
The material of described rectification module 2, interior potted component 3 and outer sealing element 4 is metal material.
More than specific description of embodiments of the present invention, be intended to disclose preferred forms of the present invention, make those of ordinary skill in the art can practice the present invention.But it should be noted that the present invention is not limited to above-mentioned embodiment; enlighten based on the present invention; any conspicuous conversion or equivalent substitution; the cross section of hollow and thin-walled pipe 6 also can be equilateral triangle cross section or right angled isosceles triangle as described; arrange welding by a plurality of hollow and thin-walled pipes-space, space again and fix, also should be considered to fall into protection scope of the present invention.
Claims (3)
1. modularization SCR denitration flow straightening grid device, comprise a plurality of rectification modules and the potted component that place in the described SCR reactor, it is characterized in that: vertical grid of described rectification module and the horizontal mutual interconnection of grid are fixed, be the fenestral fabric that the mutual proper alignment of a plurality of hollow and thin-walled pipes connects, be equipped with around fixing frame around the described rectification module, the axis direction of described hollow and thin-walled pipe is consistent with the rectification module short transverse; Potted component and outer sealing element in described potted component is divided into, the gap of interior potted component between described rectification module, outer sealing element is between rectification module and SCR reactor wall, potted component top is arrow shaped in described, outer sealing element top is half arrow shaped, described arrow and half arrow towards relative with flue gas flow direction.
2. according to the described modularization SCR denitration of claim 1 flow straightening grid device, it is characterized in that: the cross section of described hollow and thin-walled pipe is square, arranges welding by hollow and thin-walled pipe-space, space and fixes, and constitutes square net.
3. according to the described modularization SCR denitration of claim 1 flow straightening grid device, it is characterized in that: the material of described rectification module and potted component is metal material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110136123 CN102240506B (en) | 2011-05-25 | 2011-05-25 | Modular selective catalytic reduction (SCR) denitration rectification grating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110136123 CN102240506B (en) | 2011-05-25 | 2011-05-25 | Modular selective catalytic reduction (SCR) denitration rectification grating device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102240506A true CN102240506A (en) | 2011-11-16 |
| CN102240506B CN102240506B (en) | 2013-02-27 |
Family
ID=44958862
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110136123 Active CN102240506B (en) | 2011-05-25 | 2011-05-25 | Modular selective catalytic reduction (SCR) denitration rectification grating device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102240506B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104313352A (en) * | 2014-11-11 | 2015-01-28 | 宁夏嘉翔自控技术有限公司 | Grid flow guide plate for reducing slag collection box of magnesium metal smelting high-pressure slagging-off and charging integrated machine |
| CN105289303A (en) * | 2015-11-11 | 2016-02-03 | 华南理工大学 | Eddy-flow atomization SCR denitration method and apparatus thereof |
| CN106246917A (en) * | 2016-09-08 | 2016-12-21 | 苏州西热节能环保技术有限公司 | A kind of SCR denitration module sealing device |
| CN107185908A (en) * | 2017-05-10 | 2017-09-22 | 哈尔滨工程大学 | A kind of soot blower and ash-blowing method in denitrating system rectangle reaction unit peculiar to vessel |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090324453A1 (en) * | 2008-06-25 | 2009-12-31 | Cummins Filtration Ip, Inc. | Catalytic Devices for Converting Urea to Ammonia |
| CN201596464U (en) * | 2009-11-26 | 2010-10-06 | 哈尔滨锅炉厂有限责任公司 | Rectifying device for SCR flue gas denitration by selectivity catalysis-reduction method |
| CN202078856U (en) * | 2011-05-25 | 2011-12-21 | 上海龙净环保科技工程有限公司 | Modular SCR (Selective Catalytic Reduction) denitration and rectification grid device |
-
2011
- 2011-05-25 CN CN 201110136123 patent/CN102240506B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090324453A1 (en) * | 2008-06-25 | 2009-12-31 | Cummins Filtration Ip, Inc. | Catalytic Devices for Converting Urea to Ammonia |
| CN201596464U (en) * | 2009-11-26 | 2010-10-06 | 哈尔滨锅炉厂有限责任公司 | Rectifying device for SCR flue gas denitration by selectivity catalysis-reduction method |
| CN202078856U (en) * | 2011-05-25 | 2011-12-21 | 上海龙净环保科技工程有限公司 | Modular SCR (Selective Catalytic Reduction) denitration and rectification grid device |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104313352A (en) * | 2014-11-11 | 2015-01-28 | 宁夏嘉翔自控技术有限公司 | Grid flow guide plate for reducing slag collection box of magnesium metal smelting high-pressure slagging-off and charging integrated machine |
| CN105289303A (en) * | 2015-11-11 | 2016-02-03 | 华南理工大学 | Eddy-flow atomization SCR denitration method and apparatus thereof |
| CN106246917A (en) * | 2016-09-08 | 2016-12-21 | 苏州西热节能环保技术有限公司 | A kind of SCR denitration module sealing device |
| CN106246917B (en) * | 2016-09-08 | 2019-03-22 | 苏州西热节能环保技术有限公司 | A kind of SCR denitration module sealing device |
| CN107185908A (en) * | 2017-05-10 | 2017-09-22 | 哈尔滨工程大学 | A kind of soot blower and ash-blowing method in denitrating system rectangle reaction unit peculiar to vessel |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102240506B (en) | 2013-02-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101601965B (en) | Ammonia-spraying grid device for SCR-method flue gas denitrification, and SCR-method flue gas denitrification process | |
| CN102240506B (en) | Modular selective catalytic reduction (SCR) denitration rectification grating device | |
| CN201108807Y (en) | Horizontal SCR denitrating reaction device | |
| CN201454414U (en) | Ammonia injection grille device for flue gas denitration adopting SCR method | |
| CN202478804U (en) | Sintering machine flue gas desulphurization denitration device | |
| CN100484612C (en) | Abrasion proof, vortex street strong mixing equipment in grille of spraying ammonia | |
| CN101829499A (en) | SCR (Selective Catalytic Reduction) flue gas denitrification system with structure of optimized ammonia spraying device upstream fluid field | |
| CN202860406U (en) | SCR flue gas denitrating device for glass kiln | |
| CN109045967B (en) | Ammonia spraying and mixing integrated AIG for waste heat boiler of gas unit | |
| CN102512953A (en) | CFB boiler SCR denitration technology and denitration device | |
| CN202078856U (en) | Modular SCR (Selective Catalytic Reduction) denitration and rectification grid device | |
| CN203598693U (en) | Wedge-shaped tapered rectifying grating for SCR (selective catalytic reduction) denitration device | |
| CN203002506U (en) | Ammonia spraying device and furnace | |
| CN106765826B (en) | Emission reduction environment-friendly roof ventilator | |
| CN108654368A (en) | Combustion gas SCR denitration module and the method for reducing combustion gas SCR denitration resistance | |
| CN201930723U (en) | SCR (Semiconductor Control Rectifier) smoke denitration system with structure for optimizing flow field at upstream of ammonia spraying device | |
| CN203725030U (en) | SCR (Selective Catalytic Reduction) denitration system and ammonia spraying device thereof | |
| CN206858496U (en) | A kind of activating and reducing combustion with meagre oxygen system | |
| CN202715356U (en) | Low temperature selective catalytic reduction (SCR) static bed flue gas denitration device of horizontal type heat recovery boiler | |
| CN205461788U (en) | A flue gas equipartition device for SCR denitration reactor | |
| CN204051431U (en) | A kind of denitrification apparatus | |
| CN101342463B (en) | Flue gas denitrating method and flue gas denitrating apparatus with special rectifier cell | |
| CN104190248B (en) | A kind of denitrification apparatus | |
| CN101905120A (en) | Ammonia spray nozzle mixer for SCR denitrating device | |
| CN102166472A (en) | Spiral-flow type ammonia spraying device used for selective catalytic reduction (SCR) denitrification system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |