CN109806766B - Denitration reactor system - Google Patents
Denitration reactor system Download PDFInfo
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- CN109806766B CN109806766B CN201910250060.1A CN201910250060A CN109806766B CN 109806766 B CN109806766 B CN 109806766B CN 201910250060 A CN201910250060 A CN 201910250060A CN 109806766 B CN109806766 B CN 109806766B
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- denitration reactor
- rapping
- rectification
- vibrating
- rectifying
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- 230000005540 biological transmission Effects 0.000 claims description 16
- 239000000428 dust Substances 0.000 abstract description 24
- 238000006073 displacement reaction Methods 0.000 abstract description 3
- 239000000779 smoke Substances 0.000 abstract description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 10
- 239000003546 flue gas Substances 0.000 description 10
- 239000003054 catalyst Substances 0.000 description 9
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 9
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 6
- 238000005299 abrasion Methods 0.000 description 4
- 229910021529 ammonia Inorganic materials 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000010355 oscillation Effects 0.000 description 3
- 238000003723 Smelting Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000003090 exacerbative effect Effects 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Landscapes
- Chimneys And Flues (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
The embodiment of the invention discloses a denitration reactor system, which comprises a denitration reactor, wherein a rectification grid is arranged in the denitration reactor, and the denitration reactor system further comprises: the elastic device is arranged between the denitration reactor and the rectification grating; and the vibration device is arranged in the denitration reactor and is used for vibrating the rectification grating. The invention adds the elastic device and the vibrating device, and after the rectifying grille is blocked by accumulated ash, the rectifying grille can be vibrated by starting the vibrating device. After the rectifying grille is rapped, the rectifying grille is enabled to generate displacement change under the action of the elastic device, so that self-oscillation of the rectifying grille is promoted, deposited dust is effectively removed, dust enters a dust removing link along with smoke, and the dust is removed by dust removing equipment.
Description
Technical Field
The invention relates to the technical field of environmental protection equipment, in particular to a denitration reactor system.
Background
Because of the diameter combustion of coal, the thermal power, cement and smelting industries are important emission sources of nitrogen oxides, and in order to reduce the emission of the nitrogen oxides, the national ultra-low emission requirements are implemented by winning blue sky guard war. As a mainstream technology of denitration, a selective catalytic denitration method (SCR, selective Catalytic Reduction) has been widely used in thermal power, cement and smelting industries.
The conventional denitration reactor 10 has a structure as shown in fig. 1, in which a rectification grill 12 and a catalyst module 11 are sequentially arranged in the direction from an inlet to an outlet of flue gas. Because of higher ash content of domestic combustion medium, dust in the generated flue gas is easy to cause ash accumulation and blockage of the rectifying grid 12 above the denitration reactor 10, and especially for high-ash coal with high viscosity, the denitration system is easy to accumulate ash.
The dust deposit clearance is untimely, can block up denitration reactor 10 entry cross section in a large tracts of land, and when the dust deposit height is too high, has influenced denitration reactor 10 entry structural load, has hidden danger to equipment safety. The flue gas enters the denitration reactor 10 through the unplugged portion, exacerbating the wear and damage of the local catalyst. After the dust is accumulated on the rectifying grid 12, the flow bias of the flue gas is caused, the flow field distribution is affected, the denitration efficiency is reduced, the standard emission of the nitrogen oxides is realized, the reducing agent can only be excessively injected, the consumption of the reducing agent is excessively high, and the ammonia escape is increased.
Disclosure of Invention
Accordingly, the present invention is directed to a denitration reactor system, which can avoid abrasion and damage of a local catalyst module and improve denitration efficiency.
In order to achieve the above purpose, the present invention provides the following technical solutions:
a denitration reactor system, includes the denitration reactor, be provided with the rectification grid in the denitration reactor, still include:
the elastic device is arranged between the denitration reactor and the rectification grating;
and the vibration device is arranged in the denitration reactor and is used for vibrating the rectification grating.
Preferably, in the above described denitration reactor system, the number of rapping devices is two and symmetrically arranged on both sides of the rectifying grid.
Preferably, in the above described denitration reactor system, the rapping device comprises:
the vibrating motor is arranged on the denitration reactor;
the vibration transmission rod is connected with an output shaft of the vibration motor;
the vibrating hammer is connected with the vibrating transmission rod through a flexible arm and is used for vibrating the rectifying grid.
Preferably, in the above denitration reactor system, the flexible arm includes a first half arm fixedly connected with the rapping transmission rod and a second half arm fixedly connected with the rapping hammer, and the first half arm and the second half arm are hinged.
Preferably, in the above-mentioned denitration reactor system, the rapping hammer is a plurality of rapping hammers arranged along a side face of the rectification grid.
Preferably, in the above denitration reactor system, the elastic devices are plural and are arranged around the rectification grating.
Preferably, in the above denitration reactor system, the rectifying grille is provided on a bottom frame, one end of the elastic device is connected to a wall plate of the bottom frame, and the other end is connected to the rectifying grille.
Preferably, in the above denitration reactor system, a sliding groove is provided on the bottom frame along the vibration direction of the rectifying grid, and a sliding body matched with the sliding groove is provided at the bottom of the rectifying grid.
Preferably, in the above denitration reactor system, the sliding body is a roller.
Preferably, in the above denitration reactor system, the rapping device is connected to a control system of the denitration reactor, and is automatically opened and closed according to the change of system resistance.
According to the technical scheme, the elastic device and the vibrating device are added in the denitration reactor system, and after the rectifying grating is blocked by accumulated ash, the rectifying grating can be vibrated by starting the vibrating device. After the rectifying grille is rapped, the rectifying grille is enabled to generate displacement change under the action of the elastic device, so that self-oscillation of the rectifying grille is promoted, deposited dust is effectively removed, dust enters a dust removing link along with smoke, and the dust is removed by dust removing equipment. The invention optimizes the ash removal effect of the rectification grating, ensures the denitration efficiency of the denitration reactor, reduces a series of problems of abrasion of the catalyst module, excessive ammonia spraying and the like of the denitration reactor caused by blockage, and can effectively ensure the stable operation of the denitration reactor.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a denitration reactor;
fig. 2 is a schematic structural diagram of a denitration reactor system according to an embodiment of the present invention;
FIG. 3 is a top view of a rectifying grid according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a bottom frame according to an embodiment of the present invention.
Wherein 10 is a denitration reactor, 11 is a catalyst module, 12 is a rectification grid, and 13 is an inlet horizontal section flue;
101 is a denitration reactor, 102 is a rectifying grid, 103 is an elastic device, 104 is a catalyst module, 105 is a bottom frame, 106 is a vibrating motor, 107 is a vibrating transmission rod, 108 is a vibrating hammer, 1051 is a bottom frame wall plate, 1052 is a bottom frame supporting rod, and 1053 is a chute.
Detailed Description
The invention aims at providing a denitration reactor system so as to avoid abrasion and damage of a local catalyst module and improve denitration efficiency.
Hereinafter, embodiments will be described with reference to the drawings. Furthermore, the embodiments shown below do not limit the summary of the invention described in the claims. The whole contents of the constitution shown in the following examples are not limited to the solution of the invention described in the claims.
As shown in fig. 2, the embodiment of the invention discloses a denitration reactor system, which comprises a denitration reactor 101, wherein a rectification grating 102 is arranged in the denitration reactor 101, and the rectification grating 102 is used for conducting flow guiding operation on flue gas so that the flue gas can uniformly pass through a catalyst module 104. The domestic combustion medium has higher ash content, and dust in the generated flue gas is easy to cause the dust accumulation and blockage of the rectifying grid 12. Based on this, the denitration reactor system of the present invention is added with an elastic device 103 and a rapping device.
The elastic device 103 is arranged between the denitration reactor 101 and the rectification grating 102, so that the rectification grating 102 is arranged in a floating mode, the rectification grating 102 can displace under the action of external force in the plane where the rectification grating 102 is located, and after the external force disappears, the rectification grating can reset under the action of the elastic device 103.
The elastic device 103 may be any elastic member having elasticity, such as a spring, a silicone member, a rubber elastic member, etc. Taking a spring as an example, in order to facilitate the installation of the elastic device 103, the elastic device 103 may include a spring and fixing bases disposed at two ends of the spring, wherein one fixing base is fixed on the rectification grating 102, and the other fixing base is fixed on the inner wall of the denitration reactor 101, or other fixed frames. In order to ensure that the space between the rectification grating 102 and the inner wall of the denitration reactor 101 is not smaller than 20cm, it should be noted that the oscillation can be realized only by a gap between the rectification grating 102 and the inner wall, and 20cm is a preferable choice but not the only choice.
A rapping device is arranged in the denitrification reactor 101 for rapping the rectification grid 102. The rapping device has a relatively wide application in the field of electric precipitation, and the specific structure of the rapping device is not limited in the invention, so long as the oscillation of the rectification grating 102 can be realized, and even a common eccentric motor can be realized.
The denitration reactor system provided by the invention is additionally provided with the elastic device 103 and the rapping device, and after the rectifying grid 102 is blocked by accumulated ash, the rectifying grid 102 can be rapped by starting the rapping device. After the rectifying grille 102 is rapped, the elastic device 103 causes the rectifying grille 102 to change in displacement, thereby promoting the self-oscillation of the rectifying grille 102, effectively removing deposited dust, enabling dust to enter a dust removing link along with flue gas and being removed by dust removing equipment. The invention optimizes the ash removal effect of the rectification grating 102, ensures the denitration efficiency of the denitration reactor 101, reduces a series of problems of abrasion, excessive ammonia spraying and the like of the catalyst module 104 of the denitration reactor 101 caused by blockage, and can effectively ensure the stable operation of the denitration reactor.
In the present embodiment, the rapping devices may be two and symmetrically arranged on both sides of the rectification grating 102. The rapping devices are arranged on opposite sides of the rectification grating 102 in combination with the service platform of the denitrification reactor 101 for easy maintenance and service. The two rapping devices may be operated to oscillate the rectification grating 102 simultaneously, may be operated to oscillate the rectification grating 102 alternately, or may be operated to oscillate the rectification grating 102 by one of the rapping devices.
As shown in FIG. 3, in one embodiment of the present invention, the rapping device comprises a rapping motor 106, a rapping transmission rod 107, and a rapping hammer 108.
The vibrating motor 106 is arranged on the denitration reactor 101, the vibrating motor 106 is used for providing rotary power, and the vibrating transmission rod 107 is connected with an output shaft of the vibrating motor 106 and is used for outputting the rotary power to the vibrating hammer 108. The rapping hammer 108 is connected with the rapping transmission rod 107 through a flexible arm, and the rapping hammer 108 is used for rapping the rectifying grid 102. The vibrating motor 106 drives the vibrating transmission rod 107 to rotate along the axis, so as to drive the flexible arm fixed on the vibrating transmission rod 107 to rotate along the axis of the vibrating transmission rod 107 in a centrifugal state, and accordingly the vibrating hammer 107 is centrifugally thrown out and vibrated on the rectifying grid 102, and the oscillating action of the rectifying grid 102 is formed. A plurality of rapping hammers 108 may be provided on one rapping transmission rod 107 as required, i.e. a plurality of rapping hammers 108 are arranged along the side of the rectifying grid 102, to produce a more intense and uniform oscillating effect.
Specifically, the flexible arm includes a first half arm fixedly connected to the rapping transmission rod 107 and a second half arm fixedly connected to the fixed rapping hammer 108, where the first half arm is hinged to the second half arm, and the first half arm is hinged to the second half arm to form a flexible connection, so that the rapping hammer 108 is prevented from being able to strike the rectifying grid 102 and from being interfered by the rectifying grid 102, and cannot form continuous rotation. It should be noted that the flexible arm may also be a flexible wall, such as a wire rope.
In a specific embodiment of the present invention, the number of elastic means 103 is plural and arranged around the rectifying grating 102, so that the rectifying grating 102 is more stable, and the elastic means 103 may be arranged only on the side where the rapping device is arranged and on the opposite side.
As shown in fig. 4, the rectification grating 102 is provided on a bottom frame 105, and the bottom frame 105 is fixed inside the denitration reactor 101. The bottom frame 105 has four sides provided with bottom frame walls 1051, the bottom frame walls 1051 having a thickness of not less than 20mm, and the elastic device 103 has one end connected to the bottom frame walls 1051 and the other end connected to the rectification grating 102.
The rapping transmission rod 107 and the rapping hammer 108 of the rapping device are made of high-temperature resistant, corrosion resistant and wear resistant materials, and the flexible arm penetrates through the wall plate of the denitration reactor 101 and the wall plate 1051 of the bottom frame to be connected with the rapping hammer 108.
In an embodiment of the present invention, the bottom frame 105 is provided with a chute 1053 along the vibration direction of the rectifying grille 102, and the bottom of the rectifying grille 102 is provided with a sliding body, preferably a roller, which is matched with the chute 1053. The bottom frame 105 is used to support the rectifying grid 102, and the rollers slide in the sliding grooves 1053 during the oscillation of the rectifying grid 102, so as to reduce friction between the rectifying grid 102 and the bottom frame 105.
Preferably, the bottom frame 105 is made of anti-corrosion, wear-resistant and high-temperature-resistant materials, and is welded and fixed with the supporting beams of the denitration reactor 101, and the bottom frame 105 comprises transverse and longitudinal bottom frame supporting rods 1052, so that the bottom frame supporting rods 1052 are loosely arranged under the condition of meeting the load requirement of the rectifying grid 102, and the flue gas can circulate conveniently.
The rapping device is connected to the control system of the denitration reactor 101 and is automatically opened and closed according to the change of the system resistance. After the rectifying grid 102 is excessively dusted, a control system receives a signal of rising resistance of the denitration reactor 101, and after a certain set limit value is reached, a rapping device is automatically operated to rap the rectifying grid 102. After being rapped by the rapping hammer 108, the rectifying grating 102 is displaced and changed due to the elastic device 103 and the bottom roller, so that the self-oscillation of the rectifying grating 102 is promoted, deposited dust is effectively removed, and the dust enters a dust removing link along with the flue gas and is removed by dust removing equipment.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (4)
1. A denitration reactor system, includes denitration reactor (101), be provided with rectification grid (102) in denitration reactor (101), its characterized in that still includes:
the elastic devices (103) are arranged between the denitration reactor (101) and the rectification grids (102), the elastic devices (103) are arranged around the rectification grids (102), the rectification grids (102) are arranged on the bottom frame (105), one end of each elastic device (103) is connected with a wall plate of the bottom frame (105), and the other end of each elastic device is connected with the rectification grid (102);
a rapping device, arranged in said denitration reactor (101), for rapping said rectifying grid (102), said rapping device being two and symmetrically arranged on both sides of said rectifying grid (102), said rapping device comprising:
a rapping motor (106) arranged on the denitration reactor (101);
a rapping transmission rod (107) connected with an output shaft of the rapping motor (106);
the vibrating hammer (108) is connected with the vibrating transmission rod (107) through a flexible arm, the vibrating hammer (108) is used for vibrating the rectifying grid (102), the flexible arm comprises a first half arm fixedly connected with the vibrating transmission rod (107) and a second half arm fixedly connected with the vibrating hammer (108), the first half arm is hinged with the second half arm, and the vibrating hammer (108) is a plurality of vibrating arms arranged along the side face of the rectifying grid (102).
2. The denitration reactor system according to claim 1, characterized in that a chute (1053) is provided on the bottom frame (105) along the vibration direction of the rectification grating (102), and a sliding body that cooperates with the chute (1053) is provided at the bottom of the rectification grating (102).
3. The denitration reactor system of claim 2, wherein said slider is a roller.
4. A denitration reactor system according to any of claims 1-3, characterized in that the rapping device is connected to the control system of the denitration reactor (101) and is automatically turned on and off in accordance with changes in system resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910250060.1A CN109806766B (en) | 2019-03-29 | 2019-03-29 | Denitration reactor system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910250060.1A CN109806766B (en) | 2019-03-29 | 2019-03-29 | Denitration reactor system |
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| CN109806766A CN109806766A (en) | 2019-05-28 |
| CN109806766B true CN109806766B (en) | 2024-03-29 |
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| CN201910250060.1A Active CN109806766B (en) | 2019-03-29 | 2019-03-29 | Denitration reactor system |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0704607A2 (en) * | 1994-09-05 | 1996-04-03 | Abb Fläkt Ab | A securing means of ceramic monoliths |
| KR20020005557A (en) * | 2001-12-12 | 2002-01-17 | 박광주 | A Dust Collector for VOCs, Dusts and Mists Removal |
| CN204973924U (en) * | 2015-09-17 | 2016-01-20 | 江山显进机电科技服务有限公司 | Out of stock reaction unit |
| CN109316861A (en) * | 2018-09-28 | 2019-02-12 | 姚磊 | A kind of minimum discharge device for cement kiln flue gas denitration |
| CN209771831U (en) * | 2019-03-29 | 2019-12-13 | 国电环境保护研究院有限公司 | denitration reactor system |
-
2019
- 2019-03-29 CN CN201910250060.1A patent/CN109806766B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0704607A2 (en) * | 1994-09-05 | 1996-04-03 | Abb Fläkt Ab | A securing means of ceramic monoliths |
| KR20020005557A (en) * | 2001-12-12 | 2002-01-17 | 박광주 | A Dust Collector for VOCs, Dusts and Mists Removal |
| CN204973924U (en) * | 2015-09-17 | 2016-01-20 | 江山显进机电科技服务有限公司 | Out of stock reaction unit |
| CN109316861A (en) * | 2018-09-28 | 2019-02-12 | 姚磊 | A kind of minimum discharge device for cement kiln flue gas denitration |
| CN209771831U (en) * | 2019-03-29 | 2019-12-13 | 国电环境保护研究院有限公司 | denitration reactor system |
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Country or region after: China Address after: 210031 No. 10, Pudong Road, Pukou District, Jiangsu, Nanjing Applicant after: GUODIAN ENVIRONMENTAL PROTECTION RESEARCH INSTITUTE Co.,Ltd. Applicant after: National Energy Group Science and Technology Research Institute Co.,Ltd. Address before: 210031 No. 10, Pudong Road, Pukou District, Jiangsu, Nanjing Applicant before: GUODIAN ENVIRONMENTAL PROTECTION RESEARCH INSTITUTE Co.,Ltd. Country or region before: China Applicant before: GUODIAN SCIENCE AND TECHNOLOGY RESEARCH INSTITUTE Co.,Ltd. |
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