CN112594726A - High-tightness sealing door for descending flue of boiler - Google Patents
High-tightness sealing door for descending flue of boiler Download PDFInfo
- Publication number
- CN112594726A CN112594726A CN202011485323.6A CN202011485323A CN112594726A CN 112594726 A CN112594726 A CN 112594726A CN 202011485323 A CN202011485323 A CN 202011485323A CN 112594726 A CN112594726 A CN 112594726A
- Authority
- CN
- China
- Prior art keywords
- door
- boiler
- fixed pulley
- door frame
- sealing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000007789 sealing Methods 0.000 title claims abstract description 39
- 229910000831 Steel Inorganic materials 0.000 claims description 28
- 239000010959 steel Substances 0.000 claims description 28
- 238000004804 winding Methods 0.000 claims description 12
- 230000004888 barrier function Effects 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 4
- 239000012774 insulation material Substances 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims description 2
- 230000007423 decrease Effects 0.000 claims description 2
- 230000000903 blocking effect Effects 0.000 abstract description 4
- 239000000428 dust Substances 0.000 abstract description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract 1
- 239000003546 flue gas Substances 0.000 abstract 1
- 241000196324 Embryophyta Species 0.000 description 13
- 238000000034 method Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 241001330002 Bambuseae Species 0.000 description 1
- 239000004484 Briquette Substances 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J13/00—Fittings for chimneys or flues
- F23J13/08—Doors or covers specially adapted for smoke-boxes, flues, or chimneys
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
- E05F11/00—Man-operated mechanisms for operating wings, including those which also operate the fastening
- E05F11/02—Man-operated mechanisms for operating wings, including those which also operate the fastening for wings in general, e.g. fanlights
- E05F11/04—Man-operated mechanisms for operating wings, including those which also operate the fastening for wings in general, e.g. fanlights with cords, chains or cables
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
- E05F11/00—Man-operated mechanisms for operating wings, including those which also operate the fastening
- E05F11/54—Man-operated mechanisms for operating wings, including those which also operate the fastening for doors
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B7/00—Special arrangements or measures in connection with doors or windows
- E06B7/16—Sealing arrangements on wings or parts co-operating with the wings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J1/00—Removing ash, clinker, or slag from combustion chambers
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
- E05Y2999/00—Subject-matter not otherwise provided for in this subclass
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Specific Sealing Or Ventilating Devices For Doors And Windows (AREA)
- Refrigerator Housings (AREA)
Abstract
The invention discloses a boiler descending flue sealing door with strong sealing performance, which comprises a door frame and a door plate, wherein the door plate can move up and down in the door frame, a sliding groove and a fixed shaft are fixedly connected to two sides of the inner side of the door frame, a pressing wheel is rotatably connected to the surface of the fixed shaft, guide wheels are arranged on two sides of the door plate and are in sliding connection with the sliding groove, a pressing block is arranged on the surface of the door plate and on one side of the pressing wheel, a blocking strip is arranged on the inner side of the door frame, a sealing strip is arranged on the periphery of one side, located on the blocking strip, of the door plate, a chute is arranged in the middle. This kind of strong boiler descending flue sealing door of leakproofness can seal the emission of dust and flue gas completely, convenient operation.
Description
Technical Field
The invention relates to the technical field of sealing doors, in particular to a boiler descending flue sealing door with strong sealing performance.
Background
In the metal smelting process, a descending flue of a boiler generates a large amount of ash, the ash falls to an ash chamber on the ground through the flue, the high temperature and the dust are high, and the ash chamber contains a large amount of sulfuric acid smoke. A sealing door which can insulate heat, resist temperature and has good sealing performance and can be easily closed and opened is needed urgently.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides the sealing door with strong sealing performance for the descending flue of the boiler, which can completely seal the discharge of dust and smoke and is convenient to operate.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: the utility model provides a strong boiler decline flue sealing door of leakproofness, includes door frame and door plant, the door plant can reciprocate in the door frame, inboard both sides fixedly connected with spout of door frame and fixed axle, the surface of fixed axle is rotated and is connected with the pinch roller, the both sides of door plant are provided with the leading wheel, leading wheel and spout sliding connection, the surface of door plant just is located pinch roller one side and is provided with the briquetting, the inboard of door frame is provided with the blend stop, the door plant is located one side of blend stop and is provided with the sealing strip all around, the middle part of spout just is located door plant top leading wheel and just is provided with the chute to corresponding the position.
Preferably, the left side of the inner side of the door frame is provided with a first fixed pulley, the outer side of the door frame and positioned on one side of the first fixed pulley are provided with a second fixed pulley, the right side of the inner side of the door frame is provided with a steel cable fixing seat, the two sides of the top of the door frame are fixedly connected with a third fixed pulley, the left side of the door frame is provided with a sliding support frame, the sliding support frame is connected with a balancing weight in a sliding manner, the top of the balancing weight is provided with a first steel cable, one end of the first steel cable sequentially passes through the second fixed pulley, the first fixed pulley and the third fixed pulley and is fixed with the bottom of the steel cable fixing seat, the middle position of the top of the inner side of the door frame is provided with a fourth fixed pulley, the right side of the door frame is provided with a fifth fixed pulley and a winding drum, the middle position at the top of the door panel is fixedly connected with a steel cable connecting seat, a second steel cable is arranged on the surface of the winding drum, and one end of the second steel cable sequentially penetrates through the fifth fixed pulley and the fourth fixed pulley and is fixedly connected with the top of the steel cable connecting seat.
Preferably, the inclination angle of the chute is 10-20 °.
Preferably, the barrier strip is arranged obliquely.
Preferably, the driving device is a worm and gear transmission assembly, and a hand wheel is arranged at the driving end of the driving device.
Preferably, the weight of the counterweight block is smaller than the weight of the door plate.
Preferably, the surface of the door plate is provided with an ash discharge opening, and the surface of the door plate is hinged with an ash discharge door at a position opposite to the ash discharge opening.
Preferably, the surface of the door plate is provided with an observation window, and the surface of the door plate, which is positioned right opposite to the observation window, is slidably connected with a sealing plate.
Preferably, the pressing block comprises a rectangular block, and one side of the rectangular block is provided with an inclined surface.
Preferably, the door panel is internally filled with a thermal insulation material.
(III) advantageous effects
The invention provides a boiler descending flue sealing door with strong sealing performance. The method has the following beneficial effects: the chute is arranged in the middle of the chute, the pressing wheel and the pressing block are arranged, the door plate is inclined through the chute during descending, the door plate is extruded to one side of the barrier strip through the pressing wheel and the pressing block, and the sealing strip is arranged on one side of the door plate and can be tightly attached to the barrier strip, so that the sealing effect is ensured; utilize drive arrangement to drive a rolling section of thick bamboo simultaneously and rotate the lift that realizes the door plant, be provided with the balancing weight through door plant one side, be convenient for go up and down to operate the door plant.
Drawings
FIG. 1 is a front view of the structure of the present invention;
FIG. 2 is a rear view of the structure of the present invention;
FIG. 3 is an enlarged view taken at A of FIG. 1 in accordance with the present invention;
FIG. 4 is a schematic view of the inside of the door frame according to the present invention;
FIG. 5 is a front view of the door panel of the present invention;
FIG. 6 is a side view of a door panel of the present invention;
FIG. 7 is a schematic structural diagram of a briquette according to the present invention.
In the figure: 1-door frame, 2-door panel, 3-second fixed pulley, 4-first fixed pulley, 5-third fixed pulley, 6-steel cable fixing seat, 7-sliding support frame, 8-counterweight block, 9-first steel cable, 10-steel cable connecting seat, 11-fourth fixed pulley, 12-fifth fixed pulley, 13-winding drum, 14-driving device, 15-hand wheel, 16-second steel cable, 17-chute, 18-fixed shaft, 19-pressure wheel, 20-guide wheel, 21-pressing block, 211-rectangular block, 212-inclined plane, 22-baffle strip, 23-sealing strip, 24-chute, 25-ash discharge opening, 26-ash discharge door, 27-observation window and 28-sealing plate.
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. 1-7, the present invention provides a technical solution: a boiler descending flue sealing door with strong sealing performance comprises a door frame 1 and a door panel 2, wherein the door panel 2 can move up and down in the door frame 1, a sliding groove 17 and a fixing shaft 18 are fixedly connected to two sides of the inner side of the door frame 1, a pressing wheel 19 is rotatably connected to the surface of the fixing shaft 18, guide wheels 20 are arranged on two sides of the door panel 2, the guide wheels 20 are slidably connected with the sliding groove 17, a pressing block 21 is arranged on one side of the pressing wheel 19 on the surface of the door panel 2, the pressing block 21 comprises a rectangular block 211, an inclined surface 212 is arranged on one side of the rectangular block 211, a blocking strip 22 is arranged on the inner side of the door frame 1, sealing strips 23 are arranged on the periphery of one side of the blocking strip 22 on the door panel 2, a chute 24 is arranged at the middle part of the sliding groove 17 and is opposite to the corresponding position of the guide wheel 20 on the top of the door, the inclined plane 212 receives the thrust of the pressing wheel 19, so that the door panel 2 moves towards one side of the barrier strip 22, the sealing strip 23 is clamped, and the sealing performance is ensured.
The left side of the inner side of the door frame 1 is provided with a first fixed pulley 4, the outer side of the door frame 1 and one side of the first fixed pulley 4 are provided with a second fixed pulley 3, the right side of the inner side of the door frame 1 is provided with a steel cable fixing seat 6, two sides of the top of the door frame 1 are fixedly connected with third fixed pulleys 5, the left side of the door frame 1 is provided with a sliding supporting frame 7, a balancing weight 8 is connected in the sliding supporting frame 7 in a sliding manner, the weight of the balancing weight 8 is smaller than that of the door panel 2, the top of the balancing weight 8 is provided with a first steel cable 9, one end of the first steel cable 9 sequentially penetrates through the second fixed pulley 3, the first fixed pulley 4 and the third fixed pulley 5 and; the intermediate position at the inboard top of door frame 1 is provided with fourth fixed pulley 11, 1 right side of door frame is provided with fifth fixed pulley 12 and winding drum 13, winding drum 13 is located fifth fixed pulley 12 below, the surface of door frame 1 just is located winding drum 13 one side and is provided with drive arrangement 14, drive arrangement 14 is worm gear drive assembly, drive arrangement 14's drive end is provided with hand wheel 15, the intermediate position fixedly connected with steel cable connecting seat 10 at 2 tops of door plant, the surface of winding drum 13 is provided with second steel cable 16, the one end of second steel cable 16 pass fifth fixed pulley 12 and fourth fixed pulley 11 in proper order and with the top fixed connection of steel cable connecting seat 10, utilize hand wheel 15 operation worm gear drive assembly to drive winding drum 13 and rotate, realize the lift to the door plant through second steel cable 16.
The inclination angle of the chute 24 is 10-20 deg..
The barrier strip 22 is disposed obliquely.
The surface of the door plate 2 is provided with an ash discharge opening 25, and the surface of the door plate 2 is hinged with an ash discharge door 26 at the position opposite to the ash discharge opening 25, so that ash discharge is facilitated.
The surface of door plant 2 has seted up observation window 27, and the surface of door plant 2 just is located observation window 27 and just has sliding connection to have a closing plate 28 to corresponding position, is convenient for observe the deposition condition through observation window 27.
The door panel 2 is filled with heat insulation materials, so that the heat insulation performance is good.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. The term "comprising", without further limitation, means that the element so defined is not excluded from the group consisting of additional identical elements in the process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The utility model provides a strong boiler decline flue sealing door of leakproofness, includes door frame (1) and door plant (2), its characterized in that: door plant (2) can reciprocate in door frame (1), both sides fixedly connected with spout (17) and fixed axle (18) of door frame (1) inboard, the surface rotation of fixed axle (18) is connected with pinch roller (19), the both sides of door plant (2) are provided with leading wheel (20), leading wheel (20) and spout (17) sliding connection, the surface of door plant (2) just is located pinch roller (19) one side and is provided with briquetting (21), the inboard of door frame (1) is provided with blend stop (22), door plant (2) are located one side of blend stop (22) and are provided with sealing strip (23) all around, the middle part of spout (17) just is located door plant (2) top leading wheel (20) and just is provided with chute (24) to corresponding the position.
2. The sealing door for the descending flue of the boiler as claimed in claim 1, wherein: a first fixed pulley (4) is arranged on the left side of the inner side of the door frame (1), a second fixed pulley (3) is arranged on the outer side of the door frame (1) and positioned on one side of the first fixed pulley (4), a steel cable fixing seat (6) is arranged on the right side of the inner side of the door frame (1), third fixed pulleys (5) are fixedly connected to two sides of the top of the door frame (1), a sliding support frame (7) is arranged on the left side of the door frame (1), a balancing weight (8) is slidably connected to the sliding support frame (7), a first steel cable (9) is arranged on the top of the balancing weight (8), one end of the first steel cable (9) sequentially penetrates through the second fixed pulley (3), the first fixed pulley (4) and the third fixed pulley (5) and is fixed with the bottom of the steel cable fixing seat (6), a fourth fixed pulley (11) is arranged in the middle position of, door frame (1) right side is provided with fifth fixed pulley (12) and winding drum (13), winding drum (13) are located fifth fixed pulley (12) below, the surface of door frame (1) just is located winding drum (13) one side and is provided with drive arrangement (14), intermediate position fixedly connected with steel cable connecting seat (10) at door plant (2) top, the surface of winding drum (13) is provided with second steel cable (16), the one end of second steel cable (16) pass fifth fixed pulley (12) and fourth fixed pulley (11) in proper order and with the top fixed connection of steel cable connecting seat (10).
3. The sealing door for the descending flue of the boiler as claimed in claim 1, wherein: the inclined angle of the chute (24) is 10-20 degrees.
4. The sealing door for the descending flue of the boiler as claimed in claim 1, wherein: the barrier strip (22) is obliquely arranged.
5. The sealing door for the descending flue of the boiler as claimed in claim 2, wherein: the driving device (14) is a worm gear and worm transmission assembly, and a hand wheel (15) is arranged at the driving end of the driving device (14).
6. The high-tightness sealing door for the descending flue of the boiler as claimed in claim 2, wherein: the weight of the balancing weight (8) is less than that of the door panel (2).
7. The sealing door for the descending flue of the boiler as claimed in claim 1, wherein: the surface of the door plate (2) is provided with an ash discharge opening (25), and the surface of the door plate (2) is hinged with an ash discharge door (26) at a position opposite to the ash discharge opening (25).
8. The sealing door for the descending flue of the boiler as claimed in claim 1, wherein: the surface of the door panel (2) is provided with an observation window (27), and the surface of the door panel (2) which is positioned at the position opposite to the observation window (27) is connected with a sealing plate (28) in a sliding way.
9. The sealing door for the descending flue of the boiler as claimed in claim 1, wherein: the pressing block (21) comprises a rectangular block (211), and an inclined surface (212) is arranged on one side of the rectangular block (211).
10. The sealing door for the descending flue of the boiler as claimed in claim 1, wherein: the door plate (2) is filled with heat insulation materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011485323.6A CN112594726B (en) | 2020-12-16 | 2020-12-16 | High-tightness sealing door for descending flue of boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011485323.6A CN112594726B (en) | 2020-12-16 | 2020-12-16 | High-tightness sealing door for descending flue of boiler |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112594726A true CN112594726A (en) | 2021-04-02 |
| CN112594726B CN112594726B (en) | 2023-02-07 |
Family
ID=75196558
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011485323.6A Active CN112594726B (en) | 2020-12-16 | 2020-12-16 | High-tightness sealing door for descending flue of boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112594726B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5237777A (en) * | 1992-03-10 | 1993-08-24 | American Sterilizer Company | Apparatus for eliminating slack in motorized cables |
| CN106642176A (en) * | 2017-02-24 | 2017-05-10 | 江苏汉唐环保科技有限公司 | Quick opening underground flue flashboard door |
| DE202017004355U1 (en) * | 2017-08-22 | 2017-09-18 | Siegenia-Aubi Kg | Sealing device for a sliding wing as sliding sash or sliding lift-sliding sash of a window or door |
| CN108425585A (en) * | 2018-03-23 | 2018-08-21 | 哈尔滨岛田大鹏工业股份有限公司 | A kind of lift automatic impaction door gear |
| CN108868521A (en) * | 2018-06-30 | 2018-11-23 | 安徽安旺门业股份有限公司 | A kind of fire-proof wooden door with long service life |
| KR102067703B1 (en) * | 2019-09-06 | 2020-02-25 | 주식회사 삼흥정밀 | Semiautomatic three linkage door using gas spring and running block |
| CN210921461U (en) * | 2019-10-11 | 2020-07-03 | 青岛宝通电力环保设备有限公司 | Flue door capable of being automatically opened |
| CN211714989U (en) * | 2019-12-23 | 2020-10-20 | 江苏埃柯林环保科技有限公司 | Desulfurization and denitrification flue gas shutter plate |
-
2020
- 2020-12-16 CN CN202011485323.6A patent/CN112594726B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5237777A (en) * | 1992-03-10 | 1993-08-24 | American Sterilizer Company | Apparatus for eliminating slack in motorized cables |
| CN106642176A (en) * | 2017-02-24 | 2017-05-10 | 江苏汉唐环保科技有限公司 | Quick opening underground flue flashboard door |
| DE202017004355U1 (en) * | 2017-08-22 | 2017-09-18 | Siegenia-Aubi Kg | Sealing device for a sliding wing as sliding sash or sliding lift-sliding sash of a window or door |
| CN108425585A (en) * | 2018-03-23 | 2018-08-21 | 哈尔滨岛田大鹏工业股份有限公司 | A kind of lift automatic impaction door gear |
| CN108868521A (en) * | 2018-06-30 | 2018-11-23 | 安徽安旺门业股份有限公司 | A kind of fire-proof wooden door with long service life |
| KR102067703B1 (en) * | 2019-09-06 | 2020-02-25 | 주식회사 삼흥정밀 | Semiautomatic three linkage door using gas spring and running block |
| CN210921461U (en) * | 2019-10-11 | 2020-07-03 | 青岛宝通电力环保设备有限公司 | Flue door capable of being automatically opened |
| CN211714989U (en) * | 2019-12-23 | 2020-10-20 | 江苏埃柯林环保科技有限公司 | Desulfurization and denitrification flue gas shutter plate |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112594726B (en) | 2023-02-07 |
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