CN113877346A - Flue gas filtering pipeline for industrial denitration - Google Patents
Flue gas filtering pipeline for industrial denitration Download PDFInfo
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- CN113877346A CN113877346A CN202111255023.3A CN202111255023A CN113877346A CN 113877346 A CN113877346 A CN 113877346A CN 202111255023 A CN202111255023 A CN 202111255023A CN 113877346 A CN113877346 A CN 113877346A
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- fixedly connected
- pipe
- ceramic filter
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Links
- 238000001914 filtration Methods 0.000 title claims abstract description 33
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 17
- 239000003546 flue gas Substances 0.000 title claims abstract description 17
- 239000000919 ceramic Substances 0.000 claims abstract description 100
- 239000000428 dust Substances 0.000 claims abstract description 55
- 239000003054 catalyst Substances 0.000 claims abstract description 34
- 239000000835 fiber Substances 0.000 claims abstract description 34
- 238000009413 insulation Methods 0.000 claims abstract description 29
- 239000002245 particle Substances 0.000 claims abstract description 15
- 239000007789 gas Substances 0.000 claims description 41
- 239000011148 porous material Substances 0.000 claims description 17
- 238000009434 installation Methods 0.000 claims description 8
- 238000007664 blowing Methods 0.000 claims description 6
- 239000012065 filter cake Substances 0.000 abstract description 9
- 238000004140 cleaning Methods 0.000 abstract description 4
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 5
- 238000006477 desulfuration reaction Methods 0.000 description 5
- 230000023556 desulfurization Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000009792 diffusion process Methods 0.000 description 4
- 230000002779 inactivation Effects 0.000 description 4
- 230000007774 longterm Effects 0.000 description 4
- 231100000572 poisoning Toxicity 0.000 description 4
- 230000000607 poisoning effect Effects 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 239000012528 membrane Substances 0.000 description 3
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 239000002131 composite material Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 2
- 229910010271 silicon carbide Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 150000002823 nitrates Chemical class 0.000 description 1
- 238000005453 pelletization Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
-
- 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
-
- 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
Abstract
The invention discloses a flue gas filtering pipeline for industrial denitration in the technical field of flue gas treatment, which comprises a sound insulation shell and a ceramic filter, wherein a plurality of ceramic filters are arranged in the sound insulation shell, a mounting plate is arranged in the ceramic filter, a plurality of ceramic filtering elements are fixedly arranged on the lower surface of the mounting plate, the ceramic filtering elements comprise an outer filtering layer, an intermediate fiber layer is fixedly connected to the inner wall of the outer filtering layer, one side of the intermediate fiber layer, far away from the outer filtering layer, is fixedly connected with a supporting fiber layer, one side of the supporting fiber layer, far away from the intermediate fiber layer, is fixedly connected with a catalyst particle layer, one side of the catalyst particle layer, far away from the supporting fiber layer, is fixedly connected with an embedded pipe, a plurality of first through holes are arranged on the embedded pipe, the dust cleaning strength is higher, the stable filtration can be carried out on dangerous viscous dust, and the frequent closing of the system due to the breakage of a filter cake is avoided, the residual pressure of the system is low, so that the filtering period can be prolonged, the filtering speed is improved, and the cost is reduced.
Description
Technical Field
The invention relates to the technical field of flue gas treatment, in particular to a flue gas filtering pipeline for industrial denitration.
Background
The ceramic filter element can be divided into homogeneous ceramic and composite membrane ceramic according to the microporous structure of the ceramic, and the composite membrane structure comprises a double-layer structure and a multi-layer structure. The double-layer structure is composed of a supporting layer with larger micropore diameter and a membrane filtering layer with smaller pore diameter, the structure overcomes the problems of high pressure loss and low filtering efficiency of the traditional ceramic filtering element, realizes surface filtration, and is the most typical structural form developed and applied in recent years.
In the conventional process, the dust removal and desulfurization and denitrification of the high-temperature gas are performed separately, and the dust removal is performed before the selective catalytic reduction denitrification, or the desulfurization is performed after the combustion. This multi-step operation increases costs and wastes energy. Therefore, on the basis of the ceramic high-temperature dust remover, a high-temperature gas purification integrated technology is produced.
Disclosure of Invention
The invention aims to provide a flue gas filtering pipeline for industrial denitration, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a flue gas filtering pipeline for industrial denitration, includes sound insulation shell and ceramic filter, be provided with a plurality of ceramic filter in the sound insulation shell, including the mounting panel in the ceramic filter, the lower fixed surface of mounting panel installs a plurality of ceramic filter element, including outer filter layer in the ceramic filter element, fibrous layer in the middle of outer filter layer inner wall fixedly connected with, middle fibrous layer is kept away from one side fixedly connected with of outer filter layer supports the fibrous layer, it keeps away from to support the fibrous layer one side fixedly connected with catalyst particular layer of middle fibrous layer, catalyst particular layer keeps away from support the pipe of inlaying of one side fixedly connected with on fibrous layer, a plurality of first through-holes have been seted up on the pipe of inlaying.
As a further scheme of the invention: the ceramic filter element is characterized in that a safety filter pipe is fixedly mounted on the mounting plate corresponding to the ceramic filter element, a plurality of second through holes are formed in the side wall of the safety filter pipe, and dust particles are captured by ceramic under the action of inertia collision, diffusion, bridging and the like when dust-containing air flow passes through ceramic pores, so that a layer of filter cake formed by dust is gradually formed on the surface of the ceramic. When the pressure drop of the airflow is gradually increased to a certain value due to the fact that dust is adhered to the outer wall of the ceramic tube, ash is needed to be removed, and filter cakes are made to fall off. During filtering, the air flow to be filtered firstly passes through the ceramic filter element, then passes through the safety filter pipe and the hydraulic valve, and finally enters the clean air chamber. The pressure loss during this period is less than the spray pulse, and if the ceramic filter element breaks, the dusty gas flow will pass through the guard filter tube at a very high surface velocity, preventing the dusty gas from entering the clean gas chamber and affecting the subsequent processing.
As a still further scheme of the invention: the upper end fixed mounting of insurance filter tube has the installed part, the upper end fixedly connected with connecting pipe of installed part, fixed mounting has the hydrovalve on the connecting pipe.
As a still further scheme of the invention: the upper end of the connecting pipe is fixedly connected with a connecting piece, the upper end of the connecting piece is fixedly connected with a back-blowing airflow pipe, and the upper end of the back-blowing airflow pipe penetrates through the upper surface of the sound insulation shell and extends out of the sound insulation shell.
As a still further scheme of the invention: the dust collecting hopper is fixedly arranged on the lower surface of the sound insulation shell, the dust-containing gas inlet pipe is fixedly arranged on one side of the lower end of the sound insulation shell, and the clean gas outlet pipe is fixedly connected to one side of the sound insulation shell and corresponds to the position above the safety filter pipe.
As a still further scheme of the invention: the support fiber layer and the middle fiber layer form a ceramic filter element base layer of the ceramic filter element, an outer filter layer, a middle fiber layer and a fiber inner layer forming a filter support matrix. Silicon carbide particles are deposited within the outer filter layer and the middle fiber layer, and silicon carbide is deposited within the inner fiber layer.
As a still further scheme of the invention: the ceramic filter element is characterized in that a plurality of pores are arranged in the ceramic filter element base layer, the inner wall surfaces of the pores are provided with catalyst layers, dust-containing gas enters the sound insulation shell along the dust-containing gas inlet pipe and passes through the ceramic filter, the ceramic filter removes dust of the dust-containing gas, meanwhile, the catalyst particle layers in the ceramic filter element and the catalyst layers in the pores are matched with each other to remove harmful substances such as nitre in the gas, in addition, the catalyst in the high-temperature ceramic fiber filter tube is still protected and is contained between the ceramic filter element and the embedded pipe, so that the catalyst poisoning and inactivation are avoided, compared with a traditional honeycomb selective catalytic reduction system, the catalyst keeps active for years in the filter wall, the mature long-term performance is not required, the processing steps are reduced, the trouble of denitration after dust removal in the past is avoided, the efficiency is improved, and the cost is reduced, realize integration SOx/NOx control dust pelletizing system.
As a still further scheme of the invention: the mounting panel external surface is fixed with the installation pole, the installation pole is kept away from the one end fixed connection of mounting panel is at sound insulation shell, through installation pole fixed connection between the ceramic filter.
Compared with the prior art, the invention has the beneficial effects that:
1. in the invention, through the matching between the ceramic filter element and the pore, the dust-containing gas enters the sound-proof shell along the dust-containing gas inlet pipe and passes through the ceramic filter, the ceramic filter removes the dust of the dust-containing gas, meanwhile, the catalyst particle layer in the ceramic filter element and the catalyst layer in the pores are matched to remove harmful substances such as nitre and the like in the gas, in addition, the catalyst in the high temperature ceramic fiber filter tube is still protected because it is incorporated between the ceramic filter element and the embedded tube, therefore, the poisoning and the inactivation of the catalyst are avoided, compared with a traditional honeycomb selective catalytic reduction system, the catalyst keeps active for several years in the filtering wall, the mature long-term performance does not need to be recovered, the processing steps are reduced, the trouble of denitration after dust removal in the past is avoided, the efficiency is improved, the cost is reduced, and the integrated desulfurization, denitrification and dust removal system is realized.
2. According to the invention, through the matching between the safety filter pipe and the mounting plate, when dust-containing airflow passes through ceramic pores, under the actions of inertial collision, diffusion, bridging and the like, dust particles are captured by the ceramic, and a layer of filter cake consisting of dust is gradually formed on the surface of the ceramic. When the pressure drop of the airflow is gradually increased to a certain value due to the fact that dust is adhered to the outer wall of the ceramic tube, ash is needed to be removed, and filter cakes are made to fall off. During filtering, the air flow to be filtered firstly passes through the ceramic filter element, then passes through the safety filter pipe and the hydraulic valve, and finally enters the clean air chamber. The pressure loss during this period is less than the spray pulse, and if the ceramic filter element breaks, the dusty gas flow will pass through the guard filter tube at a very high surface velocity, preventing the dusty gas from entering the clean gas chamber and affecting the subsequent processing.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a structural cross-sectional view of the present invention;
FIG. 3 is a partial schematic view of the structure of FIG. 2 at A in accordance with the present invention;
FIG. 4 is a schematic structural view of a ceramic filter element according to the present invention;
FIG. 5 is a structural cross-sectional view of a ceramic filter element according to the present invention;
FIG. 6 is a partial schematic view of the structure shown at B in FIG. 5 according to the present invention.
In the figure: 1. a sound-insulating housing; 2. a dust-containing gas inlet pipe; 3. a dust collecting hopper; 4. cleaning a gas outlet pipe; 5. a blowback airflow pipe; 6. a ceramic filter; 7. a ceramic filter element; 8. a safety filter tube; 9. a mounting member; 10. a connecting pipe; 11. a connecting member; 12. mounting a plate; 13. an outer filter layer; 14. an intermediate fiber layer; 15. a support fiber layer; 16. a layer of catalyst particles; 17. embedding a tube; 18. a first through hole; 19. mounting a rod; 20. a hydraulic valve; 21. a catalyst layer; 22. a pore; 23. a ceramic filter element substrate.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 6, in an embodiment of the present invention, a flue gas filtering pipeline for industrial denitration includes a sound insulation housing 1 and a ceramic filter 6, a plurality of ceramic filters 6 are disposed in the sound insulation housing 1, an installation plate 12 is disposed in the ceramic filter 6, a plurality of ceramic filter elements 7 are fixedly installed on a lower surface of the installation plate 12, the ceramic filter elements 7, an outer filter layer 13 is disposed in the ceramic filter elements 7, an inner wall of the outer filter layer 13 is fixedly connected with a middle fiber layer 14, one side of the middle fiber layer 14, which is far away from the outer filter layer 13, is fixedly connected with a supporting fiber layer 15, one side of the supporting fiber layer 15, which is far away from the middle fiber layer 14, is fixedly connected with a catalyst particle layer 16, one side of the catalyst particle layer 16, which is far away from the supporting fiber layer 15, is fixedly connected with an embedded pipe 17, and a plurality of first through holes 18 are disposed on the embedded pipe 17.
Wherein, the position that corresponds ceramic filter element 7 on mounting panel 12 is fixed and is installed insurance filter tube 8, and a plurality of second through-holes have been seted up to the lateral wall of insurance filter tube 8, and when dusty air current passed through ceramic pore 22, under effects such as inertial collision, diffusion and bridging, the dust granule is caught by the pottery, forms the filter cake that a layer is constituteed by the dust gradually on the ceramic surface. When the pressure drop of the air flow is gradually increased to a certain value due to the fact that dust is adhered to the outer wall of the ceramic pipe, ash is needed to be removed, filter cakes are made to fall off, due to various reasons, the ceramic filter pipe is broken frequently in the using process of the device, once one ceramic filter element 7 is broken, the air flow containing dust enters a filter cleaning air chamber and enters a subsequent process such as a gas turbine and the like from a clean air outlet to affect subsequent work, each filter element is provided with a safety filter pipe 8, and the ceramic filter elements 7 are grouped. During filtering, the air flow to be filtered firstly passes through the ceramic filter element 7, then passes through the safety filter pipe 8 and the hydraulic valve 20, and finally enters the clean air chamber. The pressure loss during the period is smaller than the jet pulse, if the ceramic filter element 7 is broken, the dust-containing gas flow can pass through the safety filter pipe 8 at a high surface speed, and the dust-containing gas is prevented from entering a clean gas chamber to influence the subsequent processing; the upper end of the safety filter pipe 8 is fixedly provided with a mounting part 9, the upper end of the mounting part 9 is fixedly connected with a connecting pipe 10, and a hydraulic valve 20 is fixedly arranged on the connecting pipe 10; the upper end of the connecting pipe 10 is fixedly connected with a connecting piece 11, the upper end of the connecting piece 11 is fixedly connected with a back blowing airflow pipe 5, and the upper end of the back blowing airflow pipe 5 penetrates through the upper surface of the sound insulation shell 1 and extends out of the sound insulation shell 1; a dust collecting hopper 3 is fixedly arranged on the lower surface of the sound insulation shell 1, a dust-containing gas inlet pipe 2 is fixedly arranged on one side of the lower end of the sound insulation shell 1, and a clean gas outlet pipe 4 is fixedly connected to one side of the sound insulation shell 1 and corresponds to the position above the safety filter pipe 8; the supporting fiber layer 15 and the intermediate fiber layer 14 constitute a ceramic filter element base layer 23 of the ceramic filter element 7; a plurality of pores 22 are arranged in a ceramic filter element base layer 23, a catalyst layer 21 is arranged on the inner wall surface of each pore 22, dust-containing gas enters the sound insulation shell 1 along a dust-containing gas inlet pipe 2 and passes through the ceramic filter 6, the ceramic filter 6 removes dust of the dust-containing gas, meanwhile, a catalyst particle layer 16 in the ceramic filter element 7 and the catalyst layer 21 in each pore 22 are matched to remove harmful substances such as nitre and the like in the gas, in addition, the catalyst in the high-temperature ceramic fiber filter pipe is still protected and is contained between the ceramic filter element 7 and the embedded pipe 17, so that the catalyst poisoning and inactivation are avoided, compared with the traditional honeycomb-shaped selective catalytic reduction system, the catalyst keeps active for years in the filter wall, the mature long-term performance does not need to be recovered, the processing steps are reduced, the trouble of denitration after dust removal in the past is avoided, and the efficiency is improved, the cost is reduced, and an integrated desulfurization, denitrification and dust removal system is realized; the outer surface of the mounting plate 12 is fixed with a mounting rod 19, one end of the mounting rod 19 far away from the mounting plate 12 is fixedly connected to the sound insulation shell 1, and the ceramic filter 6 is fixedly connected through the mounting rod 19.
The working principle of the invention is as follows: the dust-containing gas enters the sound insulation shell 1 along the dust-containing gas inlet pipe 2 and passes through the ceramic filter 6, the ceramic filter 6 removes dust of the dust-containing gas, meanwhile, the catalyst particle layer 16 in the ceramic filter element 7 and the catalyst layer 21 in the pores 22 are matched to remove harmful substances such as nitrates and the like in the gas, in addition, the catalyst in the high-temperature ceramic fiber filter tube is still protected because the catalyst is brought between the ceramic filter element 7 and the embedded pipe 17, so that the poisoning and the inactivation of the catalyst are avoided, compared with the traditional honeycomb selective catalytic reduction system, the catalyst keeps active in the filter wall for years, no long-term performance recovering to maturity is needed, the processing steps are reduced, the trouble of denitration after dust removal in the past is avoided, the efficiency is improved, the cost is reduced, and the integrated desulfurization, denitration and dust removal system is realized. When the dusty gas flow passes through the ceramic pores 22, under the action of inertial collision, diffusion, bridging and the like, dust particles are captured by the ceramic, and a filter cake consisting of dust is gradually formed on the surface of the ceramic. When the pressure drop of the air flow is gradually increased to a certain value due to the fact that dust is adhered to the outer wall of the ceramic pipe, ash is needed to be removed, filter cakes are made to fall off, due to various reasons, the ceramic filter pipe is broken frequently in the using process of the device, once one ceramic filter element 7 is broken, the air flow containing dust enters a filter cleaning air chamber and enters a subsequent process such as a gas turbine and the like from a clean air outlet to affect subsequent work, each filter element is provided with a safety filter pipe 8, and the ceramic filter elements 7 are grouped. During filtering, the air flow to be filtered firstly passes through the ceramic filter element 7, then passes through the safety filter pipe 8 and the hydraulic valve 20, and finally enters the clean air chamber. The pressure loss during this period is less than the spray pulse and if the ceramic filter element 7 breaks, the dusty gas flow will pass through the guard filter tube 8 at a very high surface velocity, preventing the dusty gas from entering the clean gas chamber and affecting the subsequent processing.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (8)
1. The utility model provides a flue gas filtering pipeline for industry denitration, includes sound insulation shell (1) and ceramic filter (6), its characterized in that: a plurality of ceramic filters (6) are arranged in the sound insulation shell (1), a mounting plate (12) is arranged in each ceramic filter (6), a plurality of ceramic filter elements (7) are fixedly arranged on the lower surface of the mounting plate (12), the ceramic filter element (7) is characterized in that an outer filter layer (13) is arranged in the ceramic filter element (7), the inner wall of the outer filtering layer (13) is fixedly connected with an intermediate fiber layer (14), one side of the middle fiber layer (14) far away from the outer filter layer (13) is fixedly connected with a supporting fiber layer (15), a catalyst particle layer (16) is fixedly connected to one side of the supporting fiber layer (15) far away from the middle fiber layer (14), one side of the catalyst particle layer (16) far away from the support fiber layer (15) is fixedly connected with an embedded pipe (17), and a plurality of first through holes (18) are formed in the embedded pipe (17).
2. The flue gas filtering pipeline for industrial denitration according to claim 1, characterized in that: the mounting plate (12) is provided with an insurance filter pipe (8) corresponding to the position fixing of the ceramic filter element (7), and the side wall of the insurance filter pipe (8) is provided with a plurality of second through holes.
3. The flue gas filtering pipeline for industrial denitration according to claim 2, characterized in that: the upper end fixed mounting of insurance filter tube (8) has installed part (9), the upper end fixedly connected with connecting pipe (10) of installed part (9), fixed mounting has hydrovalve (20) on connecting pipe (10).
4. The flue gas filtering pipeline for industrial denitration according to claim 3, characterized in that: the upper end of the connecting pipe (10) is fixedly connected with a connecting piece (11), the upper end of the connecting piece (11) is fixedly connected with a back-blowing airflow pipe (5), and the upper end of the back-blowing airflow pipe (5) penetrates through the upper surface of the sound insulation shell (1) and extends out of the sound insulation shell (1).
5. The flue gas filtering pipeline for industrial denitration according to claim 1, characterized in that: the dust collecting hopper (3) is fixedly installed on the lower surface of the sound insulation shell (1), a dust-containing gas inlet pipe (2) is fixedly installed on one side of the lower end of the sound insulation shell (1), and a clean gas outlet pipe (4) is fixedly connected to one side of the sound insulation shell (1) and corresponds to the position above the safety filter pipe (8).
6. The flue gas filtering pipeline for industrial denitration according to claim 1, characterized in that: the support fiber layer (15) and the intermediate fiber layer (14) form a ceramic filter element base layer (23) of the ceramic filter element (7).
7. The flue gas filtering pipeline for industrial denitration according to claim 6, characterized in that: a plurality of pores (22) are arranged in the ceramic filter element base layer (23), and a catalyst layer (21) is arranged on the inner wall surface of each pore (22).
8. The flue gas filtering pipeline for industrial denitration according to claim 1, characterized in that: mounting panel (12) surface mounting has installation pole (19), installation pole (19) are kept away from the one end fixed connection of mounting panel (12) is at sound insulation shell (1), through installation pole (19) fixed connection between ceramic filter (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111255023.3A CN113877346A (en) | 2021-10-27 | 2021-10-27 | Flue gas filtering pipeline for industrial denitration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111255023.3A CN113877346A (en) | 2021-10-27 | 2021-10-27 | Flue gas filtering pipeline for industrial denitration |
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| Publication Number | Publication Date |
|---|---|
| CN113877346A true CN113877346A (en) | 2022-01-04 |
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| CN202111255023.3A Pending CN113877346A (en) | 2021-10-27 | 2021-10-27 | Flue gas filtering pipeline for industrial denitration |
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| TW201427761A (en) * | 2013-01-14 | 2014-07-16 | Active Technology Engineering Inc | Catalytic activated filter and a method for processing waste gas by using the catalytic activated filter |
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Application publication date: 20220104 |