CN113477073A - Catalyst air inlet structure for dedusting and denitration device - Google Patents
Catalyst air inlet structure for dedusting and denitration device Download PDFInfo
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- CN113477073A CN113477073A CN202110600188.3A CN202110600188A CN113477073A CN 113477073 A CN113477073 A CN 113477073A CN 202110600188 A CN202110600188 A CN 202110600188A CN 113477073 A CN113477073 A CN 113477073A
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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
- 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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/02—Energy absorbers; Noise absorbers
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- Environmental & Geological Engineering (AREA)
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- General Chemical & Material Sciences (AREA)
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- Chemical Kinetics & Catalysis (AREA)
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Abstract
The invention relates to a catalyst air inlet structure for a dust removal and denitration device, which comprises: a purified gas delivery pipe; the flow distribution channel is arranged along the gravity direction, one end of the flow distribution channel is communicated with the outlet of the purified gas conveying pipe, and the other end of the flow distribution channel is used for being connected to the catalyst chamber; a flow distribution structure for the dedusted flue gas is arranged in the flow distribution channel; the flow distribution structure comprises flow blocking parts, and gaps are arranged between every two adjacent flow blocking parts; the flow distribution structure also comprises a flow guide plate positioned behind the flow resisting piece, the flow guide plate is a folded plate structure formed by butting two straight plates, and the plane of one straight plate is parallel to the extending direction of the flow distribution channel. By adopting the catalyst air inlet structure, the distribution uniformity of flue gas at the inlet of the catalyst is greatly improved, and the flow blocking piece is combined with the flow guide plate, so that flue gas after dust removal can flow uniformly and smoothly to a chamber containing the catalyst along the flow distribution channel, and non-uniform flow caused by excessive impact of the flue gas on the flow distribution channel is prevented, and the integral denitration rate of a dust removal and denitration system is improved.
Description
Technical Field
The invention relates to a dust removal and denitration device, in particular to a catalyst air inlet structure for the dust removal and denitration device.
Background
At integrative device of dust removal denitration, the dust remover removes dust the back with the flue gas, discharge from the gas purification room that is located the dust remover top, the net gas after the dust removal, carry the container that contains the catalyst with the net gas through the pipeline in, in the container in-process of carrying the catalyst, generally with the pipeline setting assistance borrow gravity to carry the pipeline of catalyst downwards, then when the net gas of present gas purification room discharges the back and enters into foretell pipeline, the more impact roof or lateral wall or inner wall etc. of air current, can not let the flue gas after the dust removal be the net gas smooth and easy, even along the foretell pipeline vertically enter into the cavity that contains the catalyst, lead to the catalyst can not be even with the flue gas after the dust removal to react, just also lead to the denitration rate not high.
Disclosure of Invention
The invention aims to provide a catalyst air inlet structure which enables flue gas after dust removal to flow into a cavity containing a catalyst more uniformly and smoothly.
The technical scheme adopted by the invention is that the catalyst air inlet structure for the dedusting and denitration device comprises:
the clean gas conveying pipe is used for conveying the dedusted flue gas;
the flow distribution channel is arranged along the gravity direction, one end of the flow distribution channel is communicated with the outlet of the purified gas conveying pipe, and the other end of the flow distribution channel is used for being connected to the catalyst chamber;
wherein, a flow distribution structure for dedusting smoke is arranged in the flow distribution channel;
the flow distribution structure comprises flow blocking pieces which are close to the outlet of the clean air conveying pipe and positioned at the inlet of the flow distribution channel, the flow blocking pieces are arranged along the conveying direction vertical to the clean air conveying pipe to form a flow blocking array, and gaps are arranged between every two adjacent flow blocking pieces;
the flow distribution structure also comprises a flow guide plate positioned behind the flow resisting piece, the flow guide plate is a folded plate structure formed by butting two straight plates, and the plane of one straight plate is parallel to the extending direction of the flow distribution channel.
In the denitration that removes dust, the flue gas after the dust removal can concentrate to the air-purifying chamber top, lead to the top flue gas velocity of flow higher, in order to slow down high-speed air current, at the export of clean gas conveyer pipe, be located the choker that the steam distribution passageway entrance set up, can effectually carry out the even process of flue gas, so that the flue gas can more even entering steam distribution passageway, set up choker and choked flow array, prevented that the flue gas can strike the steam distribution passageway inner wall in a large number, the flue gas distribution homogeneity of catalyst import has been improved greatly, combine choked flow and foretell guide plate, the flue gas after making the dust removal can be even, smooth and easy along steam distribution passageway flow direction contain the cavity of catalyst, prevent the too much non-uniform flow that the impact of flue gas caused to steam distribution passageway, in order to improve the holistic denitration rate of dust removal denitration system.
Further, the choked flow parts are tubular or cylindrical, and gaps between the adjacent choked flow parts correspond to the inner sides of the guide plates.
Further, the extending direction of the clean air conveying pipe intersects with the extending direction of the air distribution channel.
Furthermore, the joint of the distribution channel and the clean air delivery pipe forms a bent structure, the flow blocking piece is close to one side of the outer wall of the bent structure, namely the flow blocking piece is arranged at the position where the flue gas turns, and particularly, the flow blocking piece is arranged at the position where the turning flue gas is most concentrated, so that the flow blocking piece can fully distribute, decelerate, buffer and the like the flue gas.
Further, the clean air delivery pipe is arranged in the horizontal direction, the clean air port of the clean air delivery pipe is arranged at the lower side of the clean air delivery pipe, and the flow blocking piece is close to the top surface of the flow distribution channel.
Furthermore, the guide plates are arranged in the flow distribution channel to form a guide plate array, the guide plate array is obliquely arranged, the lower side of the guide plate array is close to the inner side wall of the bent structure, and the upper side of the guide plate array is close to the outer side wall of the bent structure.
Furthermore, the flow distribution structure further comprises single straight plates corresponding to the upper side and the lower side of the guide plate array respectively, the plane where the single straight plates are located is parallel to the extending direction of the flow distribution channel, and the outlet of the purified air conveying pipe corresponds to the transverse projection of the structure formed by the guide plate array and the single straight plates.
Further, the guide plate comprises a horizontal straight plate and a vertical straight plate, and a horizontal projection of the vertical straight plate in the guide plate is partially overlapped with a horizontal projection of the vertical straight plate of the adjacent guide plate, or the horizontal projection of the vertical straight plate in the guide plate is partially overlapped with a horizontal projection of the adjacent single straight plate.
Furthermore, the vertical projection of the transverse straight plate of the guide plate is not overlapped with the vertical projection of the transverse straight plate of the adjacent guide plate.
Furthermore, the upper edge of the single straight plate corresponding to the upper side of the guide plate array is connected with the top plate of the flow distribution channel.
The invention is further described with reference to the following figures and detailed description. Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to assist in understanding the invention, and are included to explain the invention and their equivalents and not limit it unduly. In the drawings:
FIG. 1 is a schematic view of a catalyst air inlet structure for a dust-removing and denitration apparatus in the present embodiment;
FIG. 2 is a schematic view for explaining the flow direction of a gas flow simulating the catalyst gas inlet structure of the present dust-removing and denitration apparatus in the embodiment;
labeled as: the device comprises a gas purifying chamber 1, a catalyst chamber 2, a purified gas conveying pipe 3, a flow distribution channel 4, a bent structure 410, a flow blocking piece 5, a flow guide plate 6, a transverse straight plate 610, a vertical straight plate 620, an upper straight plate 7a and a lower straight plate 7 b.
Detailed Description
The invention will be described more fully hereinafter with reference to the accompanying drawings. Those skilled in the art will be able to implement the invention based on these teachings. Before the present invention is described in detail with reference to the accompanying drawings, it is to be noted that:
the technical solutions and features provided in the present invention in the respective sections including the following description may be combined with each other without conflict.
Moreover, the embodiments of the present invention described in the following description are generally only examples of a part of the present invention, and not all examples. Therefore, all other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without any creative effort shall fall within the protection scope of the present invention.
With respect to terms and units in the present invention. The term "comprises" and any variations thereof in the description and claims of this invention and the related sections are intended to cover non-exclusive inclusions.
Referring to fig. 1, a large arrow indicates an airflow direction, and fig. 1 illustrates a catalyst air inlet structure for a dust removal and denitration device, which is arranged between a clean air chamber 1 and a catalyst chamber 2 of a dust remover, and comprises a clean air conveying pipe 3 for conveying dust-removed flue gas, a flow distribution channel 4 for distributing the flue gas and conveying the flue gas into a catalyst, wherein the flow distribution channel 4 is arranged along a gravity direction, one end of the flow distribution channel 4 is communicated with an outlet of the clean air conveying pipe 3, and the other end of the flow distribution channel 4 is connected to the catalyst chamber 2; a flow distribution structure for the dedusted flue gas is arranged in the flow distribution channel 4; the flow distribution structure comprises flow blocking pieces 5 which are close to the outlet of the net air delivery pipe 3 and positioned at the inlet of the flow distribution channel 4, the flow blocking pieces 5 are arranged along the direction vertical to the delivery direction of the net air delivery pipe 3 to form a flow blocking array, and gaps are arranged between every two adjacent flow blocking pieces 5; the flow distribution structure further comprises a flow guide plate 6 positioned behind the flow resisting piece 5, wherein the flow guide plate 6 is a folded plate structure formed by butting two straight plates, and the plane of one straight plate is parallel to the extending direction of the flow distribution channel 4.
At the export of clean gas conveying pipe 3, be located the choker 5 that the 4 entrances in cloth flow path set up, can effectually carry out the even process of flue gas, so that the flue gas can more even entering cloth flow path 4, set up choker 5 and choker array, it can strike 4 inner walls in cloth flow path in a large number to have prevented the flue gas, the flue gas distribution uniformity of catalyst import has been improved greatly, combine choker 5 and foretell guide plate 6, prevent the too much non-uniform flow that causes of the impact of flue gas to cloth flow path 4, in order to improve the holistic denitration rate of dust removal denitration system. For convenient maintenance, the flow distribution structure can be suspended on the top of the flow distribution channel 4 by a circular tube.
The choked flow pieces 5 are tubular or cylindrical, gaps between the adjacent choked flow pieces 5 correspond to the inner sides of the guide plates 6, the choked flow pieces 5 can be steel pipes, the steel pipes are fixed in the distribution channel 4, smoke can smoothly flow through the gaps and is guided to the guide plates 6, and then the smoke is guided by flow guide to flow to the catalyst along the distribution channel 4. The flow blocking array can be formed by arranging three cylindrical steel pipes.
The joint of the distribution channel 4 and the clean air delivery pipe 3 forms a bending structure 410, the flow blocking piece 5 is close to one side of the outer wall of the bending structure 410, namely the flow blocking piece 5 is arranged at the smoke turning position, and particularly the flow blocking piece 5 is arranged at the position where the smoke is most concentrated by turning, so that the flow blocking piece 5 can fully distribute, decelerate, buffer and the like the smoke.
The clean air delivery pipe 3 is arranged in the horizontal direction, the clean air port of the clean air delivery pipe 3, namely the clean air chamber 1, is arranged at the lower side of the clean air delivery pipe 3, and the flow choking piece 5 is close to the top surface of the flow distribution channel 4. The guide plates 6 are arranged in the flow distribution channel 4 to form a guide plate 6 array, the guide plate 6 array is obliquely arranged, the lower side of the guide plate 6 array is close to the inner side wall of the bent structure 410, and the upper side of the guide plate 6 array is close to the outer side wall of the bent structure 410. The oblique arrangement enables the guide plates 6 to have overlapping parts in the transverse projection, so that smoke flowing in the distribution channel 4 can be guided by the guide plates 6 fully.
The flow distribution structure further comprises an upper single straight plate 7a corresponding to the upper side of the flow guide plate 6 array and a lower single straight plate 7b corresponding to the lower side of the flow guide plate 6 array, the planes of the upper single straight plate 7a and the lower single straight plate 7b are parallel to the extending direction of the flow distribution channel 4, and the outlet of the clean air conveying pipe 3 corresponds to the transverse projection of the structure formed by the flow guide plate 6 array, the upper single straight plate 7a and the lower single straight plate 7 b. The outlet of the clean air delivery pipe 3 corresponds to the transverse projection of the structure formed by the guide plate 6 array and the single straight plate, namely the transverse projection of the outlet of the clean air delivery pipe 3 is fully covered by the transverse projection of the structure formed by the guide plate 6 array and the single straight plate, so that the flue gas flowing in the air distribution passage 4 can be fully guided by the guide plate 6 and the single straight plate.
The baffle 6 comprises a horizontal straight plate 610 and a vertical straight plate 620, and the horizontal projection of the vertical straight plate 620 in the baffle 6 is partially overlapped with the horizontal projection of the vertical straight plate 620 of the adjacent baffle 6, or the horizontal projection of the vertical straight plate 620 in the baffle 6 is partially overlapped with the horizontal projection of the adjacent single straight plate. Because the separation area through which the flue gas from the air purifying chamber 1 generally passes is wider, a single straight plate is arranged at the position corresponding to the lower side of the flow guide array, and preferably, a gap is left between the lower single straight plate 7b and the inner side edge of the bent structure 410, that is, the single straight plate is far away from the edge of the flow distribution channel 4, so that the flue gas can smoothly enter the flow distribution channel 4.
The vertical projection of a transverse straight plate 610 of a baffle 6 does not overlap with the vertical projection of a transverse straight plate 610 of an adjacent baffle 6. Therefore, after the smoke is guided and turned by the guide plate 6, the smoke can smoothly and vertically flow downwards without impacting other guide plates 6.
The upper edge of the upper straight plate 7a corresponding to the upper side of the array of the guide plates 6 is connected with the top plate of the distribution passage 4. The upper straight plate 7a corresponding to the upper side of the guide plate 6 array is arranged to prevent the uppermost flue gas from directly impacting the inner wall of the distribution channel 4 and then rebounding back to cause disorder of the airflow.
Through the simulation (the small arrow indicates the airflow direction) as shown in the attached figure 2, the flue gas can uniformly enter the catalyst and vertically enter the catalyst as a whole, and the integral denitration rate can be greatly improved under the condition that the catalyst is not increased.
The contents of the present invention have been explained above. Those skilled in the art will be able to implement the invention based on these teachings. Based on the above disclosure of the present invention, all other preferred embodiments and examples obtained by a person skilled in the art without any inventive step should fall within the scope of protection of the present invention.
Claims (10)
1. A catalyst inlet structure for dust removal denitrification facility, its characterized in that includes:
the clean gas conveying pipe is used for conveying the dedusted flue gas;
the flow distribution channel is arranged along the gravity direction, one end of the flow distribution channel is communicated with the outlet of the purified gas conveying pipe, and the other end of the flow distribution channel is used for being connected to the catalyst chamber;
wherein, a flow distribution structure for dedusting smoke is arranged in the flow distribution channel;
the flow distribution structure comprises flow blocking pieces which are close to the outlet of the clean air conveying pipe and positioned at the inlet of the flow distribution channel, the flow blocking pieces are arranged along the conveying direction vertical to the clean air conveying pipe to form a flow blocking array, and gaps are arranged between every two adjacent flow blocking pieces;
the flow distribution structure also comprises a flow guide plate positioned behind the flow resisting piece, the flow guide plate is a folded plate structure formed by butting two straight plates, and the plane of one straight plate is parallel to the extending direction of the flow distribution channel.
2. The catalyst air-intake structure for a dust-removing and denitration apparatus as claimed in claim 1, wherein: the flow blocking pieces are tubular or cylindrical, and gaps between the adjacent flow blocking pieces correspond to the inner sides of the guide plates.
3. The catalyst air-intake structure for a dust-removing and denitration apparatus as claimed in claim 1, wherein: the extending direction of the clean air conveying pipe is intersected with the extending direction of the air distribution channel.
4. The catalyst air-intake structure for a dust-removing and denitration apparatus as claimed in claim 1, wherein: the junction of the flow distribution channel and the clean air delivery pipe forms a bending structure, and the flow choking piece is close to one side of the outer wall of the bending structure.
5. The catalyst air-intake structure for a dust-removing and denitration apparatus as claimed in claim 4, wherein: the purified air conveying pipe is arranged in the horizontal direction, a purified air opening of the purified air conveying pipe is arranged on the lower side of the purified air conveying pipe, and the flow choking piece is close to the top surface of the flow distribution channel.
6. The catalyst air-intake structure for a dust-removing and denitration apparatus as claimed in claim 4, wherein: the guide plate is arranged in the distribution channel to form a guide plate array, the guide plate array is obliquely arranged, the lower side of the guide plate array is close to the inner side wall of the bent structure, and the upper side of the guide plate array is close to the outer side wall of the bent structure.
7. The catalyst air-intake structure for a dust-removing and denitration apparatus as claimed in claim 6, wherein: the flow distribution structure further comprises single straight plates corresponding to the upper side and the lower side of the guide plate array respectively, the plane where the single straight plates are located is parallel to the extending direction of the flow distribution channel, and the outlet of the purified air conveying pipe corresponds to the transverse projection of the structure formed by the guide plate array and the single straight plates.
8. The catalyst air-intake structure for a dust-removing and denitration apparatus as claimed in claim 7, wherein: the guide plate comprises a horizontal straight plate and a vertical straight plate, the horizontal projection of the vertical straight plate in the guide plate is partially overlapped with the horizontal projection of the vertical straight plate of the adjacent guide plate, or the horizontal projection of the vertical straight plate in the guide plate is partially overlapped with the horizontal projection of the adjacent single straight plate.
9. The catalyst air-intake structure for a dust-removing and denitration apparatus as claimed in claim 8, wherein: the vertical projection of the transverse straight plate of the guide plate is not overlapped with the vertical projection of the transverse straight plate of the adjacent guide plate.
10. The catalyst air-intake structure for a dust-removing and denitration apparatus as claimed in claim 6, wherein: the upper edge of the single straight plate corresponding to the upper side of the guide plate array is connected with the top plate of the distribution channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202110600188.3A CN113477073B (en) | 2021-05-31 | 2021-05-31 | Catalyst air inlet structure for dedusting and denitration device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110600188.3A CN113477073B (en) | 2021-05-31 | 2021-05-31 | Catalyst air inlet structure for dedusting and denitration device |
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| CN113477073A true CN113477073A (en) | 2021-10-08 |
| CN113477073B CN113477073B (en) | 2023-10-03 |
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| CN113477073B (en) | 2023-10-03 |
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