CN112807991B - Corrugated-honeycomb denitration catalyst coupling module - Google Patents
Corrugated-honeycomb denitration catalyst coupling module Download PDFInfo
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- CN112807991B CN112807991B CN202011606577.9A CN202011606577A CN112807991B CN 112807991 B CN112807991 B CN 112807991B CN 202011606577 A CN202011606577 A CN 202011606577A CN 112807991 B CN112807991 B CN 112807991B
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- flue
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- flue gas
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8621—Removing nitrogen compounds
- B01D53/8625—Nitrogen oxides
- B01D53/8631—Processes characterised by a specific device
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
- B01D45/12—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces
- B01D45/16—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces generated by the winding course of the gas stream, the centrifugal forces being generated solely or partly by mechanical means, e.g. fixed swirl vanes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/88—Handling or mounting catalysts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
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- Environmental & Geological Engineering (AREA)
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- Health & Medical Sciences (AREA)
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- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
The corrugated-honeycomb denitration catalyst coupling module comprises a flue, wherein a honeycomb catalyst module and a corrugated catalyst module are arranged in the flue, a flue gas outlet is formed in the lower end of the flue, a flue gas distribution device is connected to the upper end of the flue, and a plurality of layers of guide plates are arranged in the flue gas distribution device. The outlet of the flue gas distribution device is connected with the top end of the flue in a sealing way through a rubber sealing ring, and the ratio of the cross sectional areas of the honeycomb type catalyst module and the corrugated type catalyst module is 1: 2. the honeycomb catalyst widely applied to the coal-fired flue gas denitration industry partially replaces a corrugated catalyst, so that the economy of coal-fired flue gas denitration is improved.
Description
Technical Field
The invention relates to a corrugated-honeycomb denitration catalyst coupling module, and belongs to the technical field of gas denitration.
Background
The Selective Catalytic Reduction (SCR) is one of the flue gas denitration methods with the highest denitration rate and the most mature technology, and is widely applied to the industries of coal burning, gas burning, garbage burning and the like at present. The mainstream catalysts at present are divided into three types, namely honeycomb type, corrugated type and flat type, according to the process and appearance characteristics of the catalysts.
Corrugated catalysts have higher specific surface area due to their structural characteristics, and thus corrugated plate catalysts tend to have higher economic and reaction characteristics. The honeycomb catalyst has high structural strength and strong smoke impact abrasion resistance.
Due to the restriction of production process and form, the surface of corrugated plate catalyst is sensitive to the impact abrasion of fly ash and dust particles, so the corrugated catalyst is mostly applied to the gas industry. In coal-fired industries such as thermal power generation and the like, the flue gas conditions are complex, and the denitration flue gas usually has high dust content, so that the corrugated catalyst is difficult to be applied to the denitration reaction of the coal-fired flue gas, and the honeycomb catalyst is widely applied to the coal-fired flue gas denitration industry. In order to improve the economy of coal-fired flue gas denitration, the invention provides a novel module arrangement method of a coupled corrugated-honeycomb denitration catalyst.
Disclosure of Invention
The invention aims to provide a corrugated-honeycomb denitration catalyst coupling module, which replaces a corrugated catalyst with a honeycomb catalyst widely applied to the coal-fired flue gas denitration industry so as to improve the economy of coal-fired flue gas denitration.
The invention adopts the following technical scheme:
the corrugated-honeycomb denitration catalyst coupling module comprises a flue, wherein a honeycomb catalyst module and a corrugated catalyst module are arranged in the flue, a flue gas outlet is formed in the lower end of the flue, and a flue gas distribution device is connected to the upper end of the flue.
Furthermore, a plurality of layers of guide plates are arranged in the smoke distribution device.
Furthermore, the number of layers of the guide plate is 3-10.
Further, the number of layers of the guide plate is 4.
Furthermore, the outlet of the smoke distribution device is connected with the top end of the flue in a sealing manner through a rubber sealing ring.
Further, the ratio of the cross-sectional areas of the honeycomb catalyst module and the corrugated catalyst module is 1: 2.
the invention has the beneficial effects that:
set up rotatory flue gas distributor at denitration flue gas entry flue section, introduce the flue gas from horizontal tangential through the spiral flue, arrange guiding device in the flue inboard and make the flue gas carry the dust granule along the rotatory separation effect of the in-process realization of water conservancy diversion flue flow, the big granule in the flue gas gets into the denitration flue of vertical direction along the spiral flue outside owing to the effect of rotatory separation, and the flue gas that dust concentration is lower passes through guiding device and gets into the denitration flue along the spiral flue inboard. Therefore, a dense and a dilute subarea are formed in the flue gas and dust concentration main flue.
The invention utilizes the dense and dilute subareas of the dust concentration to arrange the corrugated denitration catalyst in a differentiation way, arranges the corrugated catalyst with small aperture and high specific surface area in the central area of the flue, and arranges the honeycomb catalyst with stronger flue gas adaptability outside the flue gas.
Compared with the direct use of the honeycomb catalyst, the arrangement mode of the catalyst module can realize that the corrugated catalyst partially replaces the honeycomb catalyst, increase the specific surface area of the whole module, and can realize better catalyst economy while enhancing the reaction characteristic of the catalyst module of the denitration device.
Under the coal-fired flue gas denitration operating mode, because the use of flue gas distributor can make the denitration flue produce the low dust concentration region, be applicable to the reaction environment of corrugated catalyst. Meanwhile, due to the partial replacement of the corrugated catalyst, the overall consumption of the catalyst is reduced due to the characteristic of high specific surface area, and the overall economy of the catalyst module is greatly improved.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of a flue gas distribution device;
FIG. 3 is a cross-sectional view of the distribution of honeycomb catalyst modules and corrugated catalyst modules within a flue;
1. flue gas distributor entry, 2, flue gas distributor, 3, honeycomb formula catalyst module, 4, corrugated catalyst module, 5, flue gas outlet, 6, flue, 7, guide plate, 8, the export of flue gas distributor.
Detailed Description
The present invention will be described in further detail with reference to specific examples.
A corrugated-honeycomb denitration catalyst coupling module comprises a flue 6, wherein a honeycomb catalyst module 3 and a corrugated catalyst module 4 (the cross section of the honeycomb catalyst module and the cross section of the corrugated catalyst module are matched with the dust concentration in passing flue gas) are arranged in the flue 6, a flue gas outlet 5 is arranged at the lower end of the flue 6, and a flue gas distribution device 2 (which rectifies the flue gas and realizes the concentration and light separation of the dust concentration) is connected to the upper end of the flue 6.
And 4 layers of guide plates 7 are arranged in the flue gas distribution device 2, and an outlet 8 of the flue gas distribution device 2 is connected with the top end of the flue 6 in a sealing manner through a rubber sealing ring. The ratio of the cross-sectional areas of the honeycomb catalyst module 3 and the corrugated catalyst module 4 is 1: 2.
Claims (6)
1. the corrugated-honeycomb denitration catalyst coupling module is characterized by comprising a flue (6), wherein a honeycomb catalyst module (3) and a corrugated catalyst module (4) are arranged in the flue (6), a flue gas outlet (5) is formed in the lower end of the flue (6), and a flue gas distribution device (2) is connected to the upper end of the flue (6); the flue gas distribution device (2) comprises a spiral flue, flue gas is introduced from the horizontal tangential direction through the spiral flue, large particles in the flue gas enter a denitration flue (6) in the vertical direction along the outer side of the spiral flue due to the action of rotary separation, the flue gas with lower dust concentration enters the denitration flue (6) along the inner side of the spiral flue, so that dense and dilute partitions of the flue gas dust concentration are formed in the flue (6), a corrugated catalyst is arranged in the central area of the flue according to the dense and dilute partitions of the flue gas dust concentration, a honeycomb catalyst is arranged on the outer side of the flue, and the cross section integral distribution of the two partitions is matched with the dust concentration in the passing flue gas.
2. The corrugated-honeycomb denitration catalyst coupling module according to claim 1, wherein a plurality of layers of flow guide plates (7) are provided in the flue gas distribution device (2).
3. The corrugated-honeycomb denitration catalyst coupling module according to claim 2, wherein the number of layers of the guide plate (7) is 3-10.
4. The corrugated-honeycomb denitration catalyst coupling module according to claim 2, wherein the number of the flow guide plates (7) is 4.
5. The corrugated-honeycomb denitration catalyst coupling module according to claim 1, wherein the outlet (8) of the flue gas distribution device (2) is connected with the top end of the flue (6) in a sealing manner through a rubber sealing ring.
6. The corrugated-honeycomb denitration catalyst coupling module according to claim 1, wherein the ratio of the cross-sectional areas of the honeycomb catalyst module (3) and the corrugated catalyst module (4) is 1: 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011606577.9A CN112807991B (en) | 2020-12-30 | 2020-12-30 | Corrugated-honeycomb denitration catalyst coupling module |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011606577.9A CN112807991B (en) | 2020-12-30 | 2020-12-30 | Corrugated-honeycomb denitration catalyst coupling module |
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| Publication Number | Publication Date |
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| CN112807991A CN112807991A (en) | 2021-05-18 |
| CN112807991B true CN112807991B (en) | 2022-07-01 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201244435Y (en) * | 2008-08-25 | 2009-05-27 | 江苏中科节能环保技术有限公司 | Horizontal type flue gas denitrating apparatus |
| CN102266722A (en) * | 2011-07-01 | 2011-12-07 | 中电投远达环保工程有限公司 | SCR (Selective Catalyctic Reduction) denitrating process and device for smoke with high dust content |
| CN203916460U (en) * | 2013-12-24 | 2014-11-05 | 国家电网公司 | The denitrating system of mixed form catalyst |
| CN205055823U (en) * | 2015-10-27 | 2016-03-02 | 安徽新力电业科技咨询有限责任公司 | Use and spout ammonia dust collector in advance in coal fired power plant flue gas |
-
2020
- 2020-12-30 CN CN202011606577.9A patent/CN112807991B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201244435Y (en) * | 2008-08-25 | 2009-05-27 | 江苏中科节能环保技术有限公司 | Horizontal type flue gas denitrating apparatus |
| CN102266722A (en) * | 2011-07-01 | 2011-12-07 | 中电投远达环保工程有限公司 | SCR (Selective Catalyctic Reduction) denitrating process and device for smoke with high dust content |
| CN203916460U (en) * | 2013-12-24 | 2014-11-05 | 国家电网公司 | The denitrating system of mixed form catalyst |
| CN205055823U (en) * | 2015-10-27 | 2016-03-02 | 安徽新力电业科技咨询有限责任公司 | Use and spout ammonia dust collector in advance in coal fired power plant flue gas |
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| CN112807991A (en) | 2021-05-18 |
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