CN113797653A - Denitration reactor non-maintaining dust collector - Google Patents
Denitration reactor non-maintaining dust collector Download PDFInfo
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- CN113797653A CN113797653A CN202111001581.7A CN202111001581A CN113797653A CN 113797653 A CN113797653 A CN 113797653A CN 202111001581 A CN202111001581 A CN 202111001581A CN 113797653 A CN113797653 A CN 113797653A
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- removal device
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/02—Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
- B01D46/023—Pockets filters, i.e. multiple bag filters mounted on a common frame
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/02—Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
- B01D46/04—Cleaning filters
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
- B01D46/12—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces in multiple arrangements
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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
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
Abstract
The invention discloses a maintenance-free dust removal device for a denitration reactor, which comprises a dust removal device main body, wherein the dust removal device main body comprises a containing shell, a discontinuous opening type long flue, a self-adjusting switching assembly, a triggering vibration assembly and a collecting box, the discontinuous opening type long flue is arranged in the containing shell, two ends of the discontinuous opening type long flue extend outwards, the self-adjusting switching assembly is arranged in the containing shell, the triggering vibration assembly is connected with the self-adjusting switching assembly, and the collecting box is arranged at the bottom of the containing shell. The invention has the advantages that the main body of the dust removal device is detachably arranged at one end of the existing denitration reactor, the coal ash in the flue gas is pretreated, the working efficiency of the denitration reactor is improved, the filtering mode is switched to automatically remove dust by filtering the accumulation degree of the coal ash, and the labor cost is reduced.
Description
Technical Field
The invention relates to the technical field of flue dust removal, in particular to a maintenance-free dust removal device for a denitration reactor.
Background
In daily life and production activities of people, various combustion devices such as boilers and kilns are generally used, and a large amount of smoke dust (flue gas) including coal dust, coke dust and toxic and harmful gas is inevitably discharged in the use process of the combustion devices. Currently, smoke purification usually only treats sulfur in smoke, but directly discharges dust in the smoke into the atmosphere, thereby inducing haze. The existing treatment method and device have unsatisfactory dust removal effect, so that a simple and convenient automatic dust removal device needs to be designed.
Disclosure of Invention
This section is for the purpose of summarizing some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. In this section, as well as in the abstract and the title of the invention of this application, simplifications or omissions may be made to avoid obscuring the purpose of the section, the abstract and the title, and such simplifications or omissions are not intended to limit the scope of the invention.
The present invention has been made keeping in mind the above problems occurring in the prior art.
Therefore, the invention aims to provide a maintenance-free dust removal device for a denitration reactor, which can save labor cost, automatically change a use mode according to the storage capacity of coal dust and improve the purification efficiency of the smoke dust.
In order to solve the technical problems, the invention provides the following technical scheme: the utility model provides a denitration reactor non-maintaining dust collector, its includes the dust collector main part, including holding the casing, set up in holding the casing and both ends outside the long flue of extension of discontinuous open type, set up the self-interacting switching module in holding the casing, with the self-interacting vibration subassembly that triggers that the switching module is connected to and set up in the collecting box that holds the casing bottom.
As a preferred scheme of the maintenance-free dust removal device for the denitration reactor, the method comprises the following steps: the accommodating shell comprises a first side cover and a second side cover which are respectively arranged on two sides of the accommodating shell, and a plurality of groups of matched moving grooves which are arranged on the inner wall of the first side cover.
As a preferred scheme of the maintenance-free dust removal device for the denitration reactor, the method comprises the following steps: the intermittent open type long flue comprises a long flue and a plurality of groups of openings which are matched with the self-adjusting switching assembly and are arranged adaptively.
As a preferred scheme of the maintenance-free dust removal device for the denitration reactor, the method comprises the following steps: the accommodating shell further comprises a first cleaning piece, a second cleaning piece and a third cleaning piece, wherein the first cleaning piece and the second cleaning piece are symmetrically arranged at the top end of the accommodating shell, and the third cleaning piece is arranged in the middle of the bottom end of the accommodating shell; the first cleaning piece, the second cleaning piece and the third cleaning piece are identical in structure.
As a preferred scheme of the maintenance-free dust removal device for the denitration reactor, the method comprises the following steps: the third cleaning piece comprises a fixing plate connected with the first side cover, a plurality of groups of trapezoidal scraping blocks arranged on one side of the fixing plate in an array mode, and scraping plates arranged at the tops of the trapezoidal scraping blocks respectively.
As a preferred scheme of the maintenance-free dust removal device for the denitration reactor, the method comprises the following steps: the self-adjusting switching assembly comprises a first dual-purpose composition board connected with the first cleaning piece, a second dual-purpose composition board connected with the second cleaning piece, a first gear meshed with one side of the first dual-purpose composition board, a second gear meshed with one side of the second dual-purpose composition board, a bilateral rack board, two sides of which are respectively meshed with the first gear and the second gear, and a third guide board connected with the bottom of the bilateral rack board; the third guide plate is connected with the third cleaning piece.
As a preferred scheme of the maintenance-free dust removal device for the denitration reactor, the method comprises the following steps: the first dual-purpose combined plate comprises a first rack plate, a first guide plate connected with one side of the first rack plate, a filter bag connected with the bottom of the first guide plate, and springs of which two ends are respectively connected with the top of the first guide plate and the inner wall of the top end of the accommodating shell; an accommodating space is formed inside the filter bag; the first dual-purpose combined plate and the second dual-purpose combined plate have the same structure, and the rack plate is arranged adaptively; and the side surfaces of the rack plate and the bilateral rack plate are respectively provided with a limiting moving block clamped with the matching moving groove.
As a preferred scheme of the maintenance-free dust removal device for the denitration reactor, the method comprises the following steps: the first guide plate comprises a plurality of groups of trapezoidal blocks arranged at the top of the first guide plate in an array manner, rectangular gaps are formed among the trapezoidal blocks, and a filter screen connected with the bottom of each trapezoidal block; the rectangular gap is matched with the trapezoidal scraping block.
As a preferred scheme of the maintenance-free dust removal device for the denitration reactor, the method comprises the following steps: the trigger vibration component comprises a power-on block arranged at the top of the bilateral rack plate, a first power-on block and a second power-on block arranged above the power-on block, a power supply connected with the first power-on block through a line, and a high-pressure air pump connected with the second power-on block through a line.
As a preferred scheme of the maintenance-free dust removal device for the denitration reactor, the method comprises the following steps: a gap with the same length as the electrifying block is arranged between the first electrifying block and the second electrifying block, and the first electrifying block, the second electrifying block and the electrifying block are made of conductive materials.
The invention has the beneficial effects that: according to the invention, the main body of the dust removal device is detachably mounted at one end of the existing denitration reactor, so that coal ash in flue gas is pretreated, the working efficiency of the denitration reactor is improved, the filtering mode is switched to automatically remove dust by filtering the accumulation degree of the coal ash, and the labor cost is reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise. Wherein:
FIG. 1 is an overall structure diagram of a maintenance-free dust removal device for a denitration reactor.
FIG. 2 is an internal structure view of a maintenance-free dust removing apparatus for a denitration reactor.
FIG. 3 is a partially omitted view of the denitration reactor maintenance-free dust removal device.
FIG. 4 is a view showing the construction of the first dual purpose composition board and the first cleaning member of the maintenance-free dust removing apparatus for a denitration reactor.
FIG. 5 is a structural view of a first dual-purpose composition board of a maintenance-free dust removing apparatus for a denitration reactor.
FIG. 6 is a view showing the construction of a third guide plate and a third cleaning member of the maintenance-free dust removing apparatus for a denitration reactor.
FIG. 7 is a view showing a usage scenario of the maintenance-free dust removal device of the denitration reactor.
Reference numerals: the dust removing device comprises a dust removing device main body 100, a containing shell 101, a discontinuous opening type long flue 102, a self-adjusting switching component 103, a trigger vibration component 104, a collecting box 105, a first side cover 101a, a second side cover 101b, a matching moving groove 101c, a long flue 102a, a plurality of groups of openings 102b, a first cleaning piece 101d, a second cleaning piece 101e, a third cleaning piece 101f, a fixing plate 101f-1, a trapezoidal scraping block 101f-2, a scraping plate 101f-3, a first dual-purpose combination plate 103a, a second dual-purpose combination plate 103b, a first gear 103c, a second gear 103d, a double-side rack plate 103e, a third guide plate 103f, a first rack plate 103a-1, a first guide plate 103a-2, a filter bag 103a-3, a spring 103a-4, a containing space M, a trapezoidal block 103a-21, rectangular gaps 103a-22, a-1, a matching moving groove 101c, a long flue 102a, a plurality of openings 102b, a first dual-purpose combination plate 103a second dual-3, a second dual-purpose combination plate, a dual-type combined-combined type combined, The filter screens 103a-23, an energizing block 104a, a first power-on block 104b, a second power-on block 104c, a power supply 104d, and a high-pressure air pump 104 e.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
Example 1
Referring to fig. 1 to 7, a first embodiment of the present invention provides a maintenance-free dust removal device for a denitration reactor, which can be installed in a flue of a denitration reactor in any prior art, so as to improve the purification efficiency of the denitration reactor.
Specifically, the dust collector main body 100 comprises a containing shell 101, an intermittent open type long flue 102 which is arranged in the containing shell 101 and extends outwards from two ends, a self-adjusting switching assembly 103 which is arranged in the containing shell 101, a triggering vibration assembly 104 which is connected with the self-adjusting switching assembly 103, and a collecting box 105 which is arranged at the bottom of the containing shell 101.
Further, the accommodating case 101 includes a first side cover 101a and a second side cover 101b respectively disposed at two sides thereof, and a plurality of sets of matching moving grooves 101c disposed at an inner wall of the first side cover 101 a. The rack plate is engaged with the limit moving block at the side surface thereof by the engaging moving groove 101c to perform limit movement.
Further, the intermittent open long flue 102 includes a long flue 102a and a plurality of sets of openings 102b that cooperate and are adapted to be disposed with the self-adjusting switching assembly 103. The plurality of sets of openings 102b are provided to facilitate the lifting of the rack plate and the settling of dust.
Further, the accommodating shell 101 further comprises a first cleaning piece 101d and a second cleaning piece 101e which are symmetrically arranged at the top end of the accommodating shell, and a third cleaning piece 101f which is arranged at the middle part of the bottom end of the accommodating shell; the first cleaning member 101d, the second cleaning member 101e and the third cleaning member 101f have the same structure.
Further, the third cleaning member 101f includes a fixing plate 101f-1 connected to the first side cover 101a, a plurality of sets of trapezoidal scraping blocks 101f-2 arranged in an array on one side of the fixing plate 101f-1, and scraping plates 101f-3 respectively arranged on tops of the trapezoidal scraping blocks 101 f-2.
Further, the self-adjusting switching member 103 includes a first dual-purpose combination plate 103a connected to the first cleaning member 101d, a second dual-purpose combination plate 103b connected to the second cleaning member 101e, a first gear 103c engaged with one side of the first dual-purpose combination plate 103a, a second gear 103d engaged with one side of the second dual-purpose combination plate 103b, a double-sided rack plate 103e having both sides engaged with the first gear 103c and the second gear 103d, respectively, and a third guide plate 103f connected to the bottom of the double-sided rack plate 103 e; the third guide plate 103f is connected with the third cleaning member 101 f; a fixed shaft connected with the first side cover 101a is arranged in the middle of each of the first gear 103c and the second gear 103 d.
Further, the first dual purpose combination plate 103a comprises a first rack plate 103a-1, a first guide plate 103a-2 connected to one side of the first rack plate 103a-1, a filter bag 103a-3 connected to the bottom of the first guide plate 103a-2, and a spring 103a-4 having two ends connected to the top of the first guide plate 103a-2 and the inner wall of the top end of the receiving case 101; an accommodating space M is formed inside the filter bag 103 a-3; the first dual-purpose combined plate 103a and the second dual-purpose combined plate 103b have the same structure, and the rack plates are arranged adaptively; the rack plate and the double-sided rack plate 103e are each provided at the side with a stopper moving block engaged with the engaging moving groove 101 c.
Further, the first guide plate 103a-2 comprises a plurality of groups of trapezoidal blocks 103a-21 arranged at the top thereof in an array, rectangular gaps 103a-22 formed between the trapezoidal blocks 103a-21, and filter screens 103a-23 connected with the bottoms of the trapezoidal blocks 103 a-21; the rectangular gaps 103a-22 are matched with the trapezoidal scraping blocks 101 f-2; the first guide plate 103a-2 is identical in structure to the third guide plate 103 f. It should be noted that the third guide plate 103f is provided as a half turn of the first guide plate 103a-2, i.e., the filter screen is provided on the top thereof.
Further, the trigger vibration assembly 104 includes an energizing block 104a disposed on the top of the double-sided rack plate 103e, a first power-on block 104b and a second power-on block 104c disposed above the energizing block 104a, a power source 104d connected to the first power-on block 104b through a line, and a high-pressure air pump 104e connected to the second power-on block 104c through a line.
Further, a gap having the same length as the energizing block 104a is provided between the first and second electrical connection blocks 104b and 104c, and the first electrical connection block 104b, the second electrical connection block 104c, and the energizing block 104a are made of a conductive material.
When in use, the device is divided into two circulating dust removal processes. The first process is as follows: referring to fig. 1, the direction of the arrow in the drawing is defined as the right direction to show the flow direction of the flue gas and the flow through hole N of the intermittent-open long flue 102, and at this time, the filter bags 103a-3 of the first dual-purpose combination board 103a and the second dual-purpose combination board 103b are respectively located at the front end and the rear end of the flow of the flue gas and are both arranged at the flue flow opening penetrating the intermittent-open long flue 102, and the opening size of the filter bags 103a-3 is the same as the size of the through hole N of the intermittent-open long flue 102. Referring to fig. 3, the front end filter bag a and the rear end filter bag B are in a state of expanding to the right under the blowing of the flue gas, and the front end filter bag a filters most of the coal ash in the flue gas and retains the coal ash in the accommodating space M.
The second process: with the accumulation of soot and slag, the weight of the front end filter bag gradually increases, so that the first guide plate 103a-2 at the top of the first dual purpose combination plate 103a moves downward away from the first cleaning member 101d, the first gear 103C rotates while the first rack plate 103a-1 connected to the first dual purpose combination plate 103a moves downward, the double-sided rack plate 103e moves upward and the second dual purpose combination plate 103B descends through the second gear 103d, and finally the front end filter bag a and the rear end filter bag B completely leave the through hole N and fall to the bottom space of the accommodating housing 101, referring to fig. 7, the first guide plate 103a-2, the second guide plate C and the third guide plate 103f move to the through hole N under the action of the respective connected rack plates, the second guide plate C is the top portion of the second dual purpose combination plate 103B, and has the same structure as the first guide plate 103a-2, at the moment, the flow area of the flue gas of the through hole N is reduced by arranging the trapezoidal blocks 103a-21 with half the width of the through hole N, the flue gas stroke is changed to pass through three groups of screens one by one, the stroke is in a convex shape, the stroke area is increased, the separation of the flue gas and the mixed flue gas is promoted by reducing the flow area of the flue gas and increasing the stroke of the flue gas, the flue gas in the mixed flue gas is effectively removed, the flue gas is prevented from blocking a catalyst pore channel in a denitration unit, and the denitration efficiency and the denitration effect are improved. The plurality of groups of trapezoidal blocks 103a-21 are arranged to reduce the flow area of the flue gas and increase the contact area of the flue gas and the flue gas, and the smoke dust and the residue slide into the collection box 105 after contacting the trapezoidal blocks 103 a-21. When the filter bags 103a-3 move to the lowest point, the electrifying block 104a arranged at the top of the double-side rack plate 103e moves to the highest point and the first electrifying block 104B and the second electrifying block 104c are switched on, so that the high-pressure air pump 104e or the high-pressure spray gun is electrified to start working, the front-end filter bag A and the rear-end filter bag B expand leftwards under the air impact of the high-pressure air pump 104e, dust in the original accommodating space M is ejected, and finally the dust is deposited in the collecting barrel. The dust and residue accumulated in the moment after the front-end filter bag A expands leftwards falls off, the weight is reduced instantly, the filter bag A quickly rises under the action of the spring 103a-4, the high-pressure air pump 104e is powered off to stop working, and energy is saved. The first guide plate 103a-2, the second guide plate C, and the third guide plate 103f in the rising or falling are in contact with the first cleaning member 101d, the second cleaning member 101e, and the third cleaning member 101f, respectively, to perform cleaning, preventing dust adsorption caused by high temperature. The rear end filter bag B plays a role in safety, and after the front end filter bag A is damaged, the rear end filter bag B replaces the front end filter bag A to repeat a similar process so as to ensure that the dust removal device main body 100 is normally adjusted.
To sum up, through at present denitration reactor one end demountable installation dust collector main part, carry out the preliminary treatment to the coal ash in the flue gas, improve denitration reactor's work efficiency to through filtering the degree that piles up of coal ash, switch the automatic dust removal of filtration mode, reduce the human cost, the energy saving.
It should be noted that the above-mentioned embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.
Claims (10)
1. The utility model provides a denitration reactor non-maintaining dust collector which characterized in that: comprises the steps of (a) preparing a mixture of a plurality of raw materials,
the dust removal device main body (100) comprises a containing shell (101), a discontinuous open type long flue (102) which is arranged in the containing shell (101) and extends outwards from two ends, a self-adjusting switching component (103) arranged in the containing shell (101), a triggering vibration component (104) connected with the self-adjusting switching component (103), and a collecting box (105) arranged at the bottom of the containing shell (101).
2. The maintenance-free dust removal device for the denitration reactor of claim 1, wherein: the accommodating shell (101) comprises a first side cover (101a) and a second side cover (101b) which are arranged on two sides of the accommodating shell respectively, and a plurality of groups of matching moving grooves (101c) which are arranged on the inner wall of the first side cover (101 a).
3. The maintenance-free dust removal device for a denitration reactor of claim 2, wherein: the intermittent open long flue (102) comprises a long flue (102a) and a plurality of groups of openings (102b) which are matched with the self-adjusting switching assembly (103) and are adaptively arranged.
4. The maintenance-free dust removal device for a denitration reactor of claim 3, wherein: the accommodating shell (101) further comprises a first cleaning piece (101d) and a second cleaning piece (101e) which are symmetrically arranged at the top end of the accommodating shell, and a third cleaning piece (101f) arranged at the middle part of the bottom end of the accommodating shell; the first cleaning piece (101d), the second cleaning piece (101e) and the third cleaning piece (101f) are identical in structure.
5. The maintenance-free dust removal device for the denitration reactor of claim 4, wherein: the third cleaning piece (101f) comprises a fixing plate (101f-1) connected with the first side cover (101a), a plurality of groups of trapezoidal scraping blocks (101f-2) arranged on one side of the fixing plate (101f-1) in an array mode, and scraping plates (101f-3) respectively arranged on the tops of the trapezoidal scraping blocks (101 f-2).
6. The maintenance-free dust removal device for the denitration reactor of claim 5, wherein: the self-adjusting switching assembly (103) comprises a first dual-purpose combination plate (103a) connected with the first cleaning member (101d), a second dual-purpose combination plate (103b) connected with the second cleaning member (101e), a first gear (103c) engaged with one side of the first dual-purpose combination plate (103a), a second gear (103d) engaged with one side of the second dual-purpose combination plate (103b), a double-sided rack plate (103e) with two sides engaged with the first gear (103c) and the second gear (103d) respectively, and a third guide plate (103f) connected with the bottom of the double-sided rack plate (103 e); the third guide plate (103f) is connected with the third cleaning piece (101 f); and fixed shafts connected with the first side cover (101a) are arranged in the middle of the first gear (103c) and the second gear (103 d).
7. The maintenance-free dust removal device for the denitration reactor of claim 6, wherein: the first dual-purpose combination plate (103a) comprises a first rack plate (103a-1), a first guide plate (103a-2) connected with one side of the first rack plate (103a-1), a filter bag (103a-3) connected with the bottom of the first guide plate (103a-2), and a spring (103a-4) with two ends respectively connected with the top of the first guide plate (103a-2) and the inner wall of the top end of the accommodating shell (101); an accommodating space (M) is formed inside the filter bag (103 a-3); the first dual-purpose combined plate (103a) and the second dual-purpose combined plate (103b) have the same structure, and the rack plates are arranged adaptively; and the side surfaces of the rack plate and the bilateral rack plate (103e) are respectively provided with a limiting moving block which is clamped with the matching moving groove (101 c).
8. The maintenance-free dust removal device for a denitration reactor of claim 7, wherein: the first guide plate (103a-2) comprises a plurality of groups of trapezoidal blocks (103a-21) arranged at the top of the first guide plate in an array, rectangular gaps (103a-22) formed among the trapezoidal blocks (103a-21), and filter screens (103a-23) connected with the bottoms of the trapezoidal blocks (103 a-21); the rectangular gaps (103a-22) are matched with the trapezoidal scraping blocks (101 f-2); the first guide plate (103a-2) and the third guide plate (103f) have the same structure.
9. The maintenance-free dust removal device for a denitration reactor of claim 8, wherein: trigger vibration subassembly (104) including set up in circular telegram piece (104a) at two side rack board (103e) tops, set up in first electricity piece (104b) and second electricity piece (104c) above circular telegram piece (104a), with first electricity piece (104b) line connection's power (104d), and with second electricity piece (104c) line connection's high compression pump (104 e).
10. The maintenance-free dust removal device for a denitration reactor of claim 9, wherein: a gap with the same length as the electrifying block (104a) is arranged between the first electrifying block (104b) and the second electrifying block (104c), and the first electrifying block (104b), the second electrifying block (104c) and the electrifying block (104a) are made of conductive materials.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111001581.7A CN113797653B (en) | 2021-08-30 | 2021-08-30 | Denitration reactor non-maintaining dust collector |
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| CN202111001581.7A CN113797653B (en) | 2021-08-30 | 2021-08-30 | Denitration reactor non-maintaining dust collector |
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