CN220779657U - Flue gas desulfurization dust removal spray set - Google Patents
Flue gas desulfurization dust removal spray set Download PDFInfo
- Publication number
- CN220779657U CN220779657U CN202322225257.4U CN202322225257U CN220779657U CN 220779657 U CN220779657 U CN 220779657U CN 202322225257 U CN202322225257 U CN 202322225257U CN 220779657 U CN220779657 U CN 220779657U
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- CN
- China
- Prior art keywords
- dust removal
- fixedly connected
- desulfurization
- flue gas
- exhaust
- 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.)
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- 239000000428 dust Substances 0.000 title claims abstract description 66
- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 63
- 230000023556 desulfurization Effects 0.000 title claims abstract description 63
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 37
- 239000003546 flue gas Substances 0.000 title claims abstract description 37
- 239000007921 spray Substances 0.000 title claims abstract description 28
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000000523 sample Substances 0.000 claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 48
- 238000001514 detection method Methods 0.000 claims description 11
- 238000007789 sealing Methods 0.000 claims description 8
- 230000000903 blocking effect Effects 0.000 claims description 4
- 239000007789 gas Substances 0.000 abstract description 21
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical compound S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 abstract description 14
- 239000000243 solution Substances 0.000 description 9
- 239000003513 alkali Substances 0.000 description 7
- 241000220317 Rosa Species 0.000 description 6
- 230000006978 adaptation Effects 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 229910052815 sulfur oxide Inorganic materials 0.000 description 5
- 239000012670 alkaline solution Substances 0.000 description 3
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- 230000003009 desulfurizing effect Effects 0.000 description 2
- TXKMVPPZCYKFAC-UHFFFAOYSA-N disulfur monoxide Inorganic materials O=S=S TXKMVPPZCYKFAC-UHFFFAOYSA-N 0.000 description 2
- 239000002440 industrial waste Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002146 bilateral effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Treating Waste Gases (AREA)
Abstract
The utility model discloses a flue gas desulfurization dust removal spray device, which relates to the technical field of flue gas desulfurization dust removal and comprises a desulfurization dust removal box, wherein an air inlet pipeline and an exhaust pipeline are fixedly communicated with the outer surface of the desulfurization dust removal box, a return pipeline is fixedly communicated between the air inlet pipeline and the exhaust pipeline, a plugging mechanism is arranged outside the exhaust pipeline, and the plugging mechanism comprises a rotating rod. It can be through exhaust duct, shutoff mechanism, return line and sulphide detect the setting of probe, sulphide in the exhaust duct detects the exhaust gas, has the oxysulfide in the gas, seals exhaust duct gas vent, and then makes gas carry out secondary desulfurization dust removal in the return line to inlet duct through the return line, until sulphide detects the probe and detects no oxysulfide, and gas is discharged to outside from exhaust duct's gas vent, effectively avoids exhaust gas still to have a small amount of oxysulfide, can cause harm to natural environment.
Description
Technical Field
The utility model relates to the technical field of flue gas desulfurization and dust removal, in particular to a flue gas desulfurization and dust removal spray device.
Background
In wet flue gas desulfurization systems, in which flue gas desulfurization is the removal of sulfur oxides from flue gas or other industrial waste gas, alkaline material (typically an alkaline solution, more typically a slurry of alkali) is encountered with the flue gas in a spray tower, SO2 in the flue gas dissolves in water to form a dilute acid solution, and then undergoes a neutralization reaction with the alkaline material dissolved in water to produce sulfite and sulfate which precipitate from the aqueous solution, depending on the relative solubilities of the different salts present in the solution, e.g., calcium sulfate, and thus tend to precipitate.
The utility model discloses a flue gas desulfurization dust removal spray set through retrieving patent number CN210964582U, which comprises a tank body, the top fixed mounting of jar body has the go-between, the top fixed mounting of go-between has the acceping pipe, the top fixed mounting of acceping the pipe has the push pipe, the inside fixed mounting of go-between has the connecting rod, the one end fixed mounting that the connecting rod kept away from the go-between has first mounting disc, the inside fixed mounting of first mounting disc has the sealing disc, the top fixed mounting of sealing disc has two catheter bilateral symmetry to distribute.
Aiming at sulfur oxides in flue gas or other industrial waste gas, a spraying device is generally additionally arranged in a smoke exhaust pipeline, so that the flue gas is desulfurized and dedusted, and the flue gas is not subjected to circulating spraying; therefore, the flue gas desulfurization dust removal spray device solves the problems.
Disclosure of Invention
The utility model aims to make up the defects of the prior art and provides a flue gas desulfurization dust removal spray device.
In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a flue gas desulfurization dust removal spray set, includes desulfurization dust removal case, desulfurization dust removal case's external surface fixed intercommunication has inlet channel and exhaust duct, fixed intercommunication has return line between inlet channel and the exhaust duct, exhaust duct's outside is provided with shutoff mechanism, shutoff mechanism includes the dwang, the dwang runs through exhaust duct's surface and rotates with exhaust duct to be connected, the external surface fixed connection of dwang has the shutoff board, the external surface fixedly connected with gear of dwang, the outer peripheral face tooth meshing of gear is connected with the rack, the rack passes through fixed block fixedly connected with screwed pipe, desulfurization dust removal case's outside is provided with circulation mechanism, circulation mechanism includes water tank and pipe two, desulfurization dust removal case's outside is provided with two stop mechanism, stop mechanism includes the sleeve.
Further, the exhaust fan is installed to the inner wall of admission line, sulphide detection probe is installed to the inner wall of exhaust line, the inner wall fixedly connected with of exhaust line two seal dog with shutoff board looks adaptation.
Further, the surface fixedly connected with slide rail of exhaust duct, slide rail and rack sliding connection, the surface fixedly connected with motor of exhaust duct, the output fixedly connected with threaded rod of motor, threaded rod and screwed pipe threaded connection, threaded rod and exhaust duct rotate to be connected.
Further, water tank fixed connection is at the surface of desulfurization dust removal case, the fixed intercommunication of surface of water tank has the rose box, the inner wall sliding connection of rose box has the filter, fixed intercommunication has pipe one between rose box and the desulfurization dust removal case, the surface mounting of pipe one has water pump one, water pump one fixed connection is at the surface of water tank.
Further, the second guide pipe penetrates through the outer surface of the water tank and is fixedly connected with the water tank, one end, far away from the water tank, of the second guide pipe is fixedly connected with a spray header, the outer surface of the second guide pipe is provided with the second water pump, and the second water pump is fixedly connected with the outer surface of the desulfurization dust removal box.
Further, sleeve fixed connection is at the surface of rose box, telescopic inner wall sliding connection has the bolt, the surface fixedly connected with of filter and bolt looks adaptation's spigot plate, the surface fixedly connected with pull rod of bolt.
Further, the spout with telescopic surface looks adaptation has been seted up to telescopic surface, the pull rod passes through telescopic spout and sleeve sliding connection, the surface fixedly connected with extension spring of bolt, the one end fixed connection that the extension spring kept away from the bolt is at telescopic inner wall.
Compared with the prior art, the flue gas desulfurization dust removal spray set has the following beneficial effects:
1. according to the utility model, through the arrangement of the exhaust pipeline, the plugging mechanism, the return pipeline and the sulfide detection probe, flue gas exhausted from a factory passes through the desulfurization and dust removal box through the air inlet pipeline to be desulfurized and removed and is discharged into the exhaust pipeline, the sulfide detection probe in the exhaust pipeline detects the exhausted gas, if sulfur oxides still exist in the gas, the control motor drives the rack to move, so that the plugging plate rotates to seal the exhaust port of the exhaust pipeline, the gas flows back into the air inlet pipeline through the return pipeline to carry out secondary desulfurization and dust removal until the sulfide detection probe detects no sulfur oxides, the plugging plate rotationally plugs the return port of the return pipeline, and the gas is discharged to the outside from the exhaust port of the exhaust pipeline, thereby effectively avoiding that the exhausted gas still has a small amount of sulfur oxides and causing harm to natural environment.
2. According to the utility model, through the arrangement of the circulating mechanism, the flue gas exhausted by a factory flows into the desulfurization and dust removal box through the air inlet pipeline, the alkali solution in the water tank is pumped by the water pump II and sprayed out of the spray header through the guide pipe II, the sprayed alkali solution carries out desulfurization and dust removal on the flue gas in the desulfurization and dust removal box, meanwhile, the alkali solution is accumulated in the desulfurization and dust removal box, the accumulated liquid in the desulfurization and dust removal box is pumped into the filter box through the water pump I, and the filtered accumulated liquid is recovered into the water tank through dust and large particles in the filtered accumulated liquid of the filter plate, so that the device can be recycled, and waste is avoided.
Drawings
FIG. 1 is a schematic perspective view of the present utility model;
FIG. 2 is a schematic perspective view of the interior of the present utility model;
FIG. 3 is a schematic perspective view of a plugging mechanism according to the present utility model;
FIG. 4 is a schematic perspective view of a circulation mechanism according to the present utility model;
fig. 5 is a schematic perspective view of a limiting mechanism according to the present utility model.
In the figure: 1. a desulfurization and dust removal box; 2. an air intake duct; 3. an exhaust duct; 4. a plugging mechanism; 41. a rotating lever; 42. a plugging plate; 43. a gear; 44. a rack; 45. a slide rail; 46. a threaded tube; 47. a threaded rod; 48. a motor; 49. a sealing stop; 5. a return line; 6. an exhaust fan; 7. a circulation mechanism; 71. a water tank; 72. a filter box; 73. a first conduit; 74. a first water pump; 75. a filter plate; 76. a second conduit; 77. a spray header; 78. a second water pump; 8. a limiting mechanism; 81. a sleeve; 82. a plug pin; 83. a telescopic spring; 84. a pull rod; 85. a receptacle plate; 9. sulfide detection probes.
Detailed Description
The principles and features of the present utility model are described below with reference to the drawings, the examples are illustrated for the purpose of illustrating the utility model and are not to be construed as limiting the scope of the utility model.
The embodiment provides a flue gas desulfurization dust removal spray set, and the device effectively avoids exhaust gas still has a small amount of oxysulfide, can cause harm to natural environment.
Example 1:
referring to fig. 1 and 2, a flue gas desulfurization dust removal spray set, including desulfurization dust removal case 1, the fixed intercommunication of surface of desulfurization dust removal case 1 has air inlet duct 2 and exhaust duct 3, exhaust fan 6 is installed to the inner wall of air inlet duct 2, sulfide detection probe 9 is installed to the inner wall of exhaust duct 3, through the setting of exhaust fan 6, exhaust fan 6 will extract the flue gas outside return line 5 and air inlet duct 2 gets into desulfurization dust removal case 1, through the setting of sulfide detection probe 9, sulfide detection probe 9 will detect whether have the sulphur oxide in the gas in exhaust duct 3 and feed back to central controller, when having sulphur oxide in the gas, drive threaded rod 47 with feedback central control system control motor 48 and rotate and make the air exit of shutoff board 42 shutoff exhaust duct 3, when no sulphur oxide in the body, drive threaded rod 47 with feedback central control system control motor 48 and reverse rotation and make the return port of shutoff board 42 shutoff return line 5, fixed intercommunication has return line 5 between air inlet duct 2 and the exhaust duct 3.
Example 2:
according to the embodiment, referring to fig. 3, the plugging mechanism 4 is provided on the outside of the exhaust pipe 3, the plugging mechanism 4 includes a rotating rod 41, the rotating rod 41 penetrates through the outer surface of the exhaust pipe 3 and is rotationally connected with the exhaust pipe 3, a plugging plate 42 is fixedly connected to the outer surface of the rotating rod 41, two sealing stoppers 49 matched with the plugging plate 42 are fixedly connected to the inner wall of the exhaust pipe 3, through the arrangement of the sealing stoppers 49, when the plugging plate 42 is attached to the sealing stoppers 49, the sealing stoppers 49 increase tightness, a gear 43 is fixedly connected to the outer surface of the rotating rod 41, a rack 44 is connected to the outer circumferential tooth of the gear 43, two blocking plates are provided on the outer surface of the rack 44, and the rack 44 is blocked from being excessively moved to cause the rack 44 to be separated from the meshing effect with the gear 43.
The outer surface fixedly connected with slide rail 45 of exhaust duct 3, slide rail 45 and rack 44 sliding connection, through the setting of slide rail 45, stability when increasing rack 44 and remove, the slope takes place when avoiding rack 44 to remove and leads to rack 44 and gear 43 to break away from the meshing.
The rack 44 is fixedly connected with the threaded pipe 46 through the fixed block, the outer surface fixedly connected with motor 48 of exhaust duct 3, the output fixedly connected with threaded rod 47 of motor 48, threaded rod 47 and threaded pipe 46 threaded connection, threaded rod 47 and exhaust duct 3 rotate and are connected, control motor 48 drives threaded rod 47 and rotates, threaded rod 47 rotates and drives threaded pipe 46 and remove, threaded pipe 46 removes and drives rack 44 and remove, rack 44 removes and will drive gear 43 rotation, gear 43 rotation will drive shutoff board 42 and overturn, can make shutoff board 42 shutoff exhaust port or the return port of return current pipeline 5 of exhaust duct 3.
Example 3:
according to the above embodiment, referring to fig. 4 and 5, the circulation mechanism 7 is disposed outside the desulfurization and dust removal box 1, the circulation mechanism 7 includes a water tank 71 and a conduit two 76, the water tank 71 is fixedly connected to the outer surface of the desulfurization and dust removal box 1, the outer surface of the water tank 71 is fixedly connected with a filter box 72, the inner wall of the filter box 72 is slidably connected with a filter plate 75, dust and large particles in the accumulated liquid are filtered through the filter plate 75 and flow back into the water tank 71, a conduit one 73 is fixedly connected between the filter box 72 and the desulfurization and dust removal box 1, a water pump one 74 is mounted on the outer surface of the conduit one 73, the water pump one 74 is fixedly connected to the outer surface of the water tank 71, and the accumulated liquid in the desulfurization and dust removal box 1 is pumped into the filter box 72 through the water pump one 74.
The second guide pipe 76 penetrates through the outer surface of the water tank 71 and is fixedly connected with the water tank 71, one end, far away from the water tank 71, of the second guide pipe 76 is fixedly connected with a spray header 77, a second water pump 78 is mounted on the outer surface of the second guide pipe 76, the second water pump 78 is fixedly connected to the outer surface of the desulfurization and dust removal box 1, flue gas exhausted from a factory flows into the desulfurization and dust removal box 1 through an air inlet pipeline 2, the second water pump 78 is controlled to pump alkaline solution in the water tank 71 and spray out of the spray header 77 through the second guide pipe 76, and the sprayed alkaline solution is used for desulfurizing and dust removing the flue gas in the desulfurization and dust removal box 1.
The outside of desulfurization dust removal case 1 is provided with two stop gear 8, and stop gear 8 includes sleeve 81, and sleeve 81 fixed connection is at the surface of rose box 72, and sleeve 81's inner wall sliding connection has bolt 82, and the surface fixedly connected with of filter 75 is with the spigot plate 85 of bolt 82 looks adaptation, inserts in the spigot plate 85 through bolt 82, carries out spacingly to filter 75, makes filter 75 remain to be located the rose box 72 always.
The surface fixedly connected with pull rod 84 of bolt 82, the spout with pull rod 84 looks adaptation is seted up to the surface of sleeve 81, pull rod 84 passes through the spout and sleeve 81 sliding connection of sleeve 81, through the setting of pull rod 84, the staff can pull rod 84 and drive bolt 82 and keep away from socket plate 85, thereby make filter 75 can take out from filter box 72, and clean filter 75, the surface fixedly connected with extension spring 83 of bolt 82, the one end fixed connection at sleeve 81 of extension spring 83 keeping away from bolt 82, through the setting of extension spring 83, make bolt 82 receive the spring tension of extension spring 83, make bolt 82 remain the joint state with socket plate 85, thereby make filter 75 continuously limited.
Working principle: when the desulfurization and dust removal device is used, flue gas exhausted from a factory enters the desulfurization and dust removal box 1 through the air inlet pipeline 2, the water pump II 78 is controlled to pump alkali solution in the water tank 71 and spray the alkali solution out of the spray header 77 through the guide pipe II 76, the sprayed alkali solution is used for desulfurizing and dust removing the flue gas in the desulfurization and dust removal box 1, the desulfurized and dust removed flue gas is discharged into the exhaust pipeline 3, the sulfide detection probe 9 in the exhaust pipeline 3 is used for detecting the discharged gas, if the sulfur oxide still exists in the gas, the control motor 48 is used for driving the threaded rod 47 to rotate, the threaded rod 47 is used for driving the threaded pipe 46 to move, the threaded pipe 46 is used for driving the rack 44 to move, the rack 44 is used for driving the gear 43 to rotate, the blocking plate 42 is further used for rotating to block the exhaust port of the exhaust pipeline 3, and then the gas flows back into the air inlet pipeline 2 through the backflow pipeline 5 to carry out secondary desulfurization and dust removal until the sulfide detection probe 9 detects sulfur-free oxide, the control motor 48 is used for driving the blocking plate 42 to rotationally block the backflow port 5, and the gas is discharged to the outside from the exhaust port of the exhaust pipeline 3, so that a small amount of sulfur oxide still is effectively prevented from being harmful to the natural environment.
The foregoing description of the preferred embodiments of the utility model is not intended to limit the utility model to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the utility model are intended to be included within the scope of the utility model.
Claims (7)
1. The utility model provides a flue gas desulfurization dust removal spray set, includes desulfurization dust removal case (1), its characterized in that: the utility model provides a desulfurization dust removal case (1)'s surface fixed intercommunication has admission line (2) and exhaust duct (3), fixed intercommunication has backflow pipeline (5) between admission line (2) and exhaust duct (3), the outside of exhaust duct (3) is provided with shutoff mechanism (4), shutoff mechanism (4) include dwang (41), dwang (41) run through the surface of exhaust duct (3) and rotate with exhaust duct (3) and be connected, the surface fixed connection of dwang (41) has shutoff board (42), the surface fixed connection of dwang (41) has gear (43), the outer periphery tooth meshing of gear (43) is connected with rack (44), rack (44) are through fixed block fixedly connected with screwed pipe (46), the outside of desulfurization dust removal case (1) is provided with circulation mechanism (7), circulation mechanism (7) include water tank (71) and pipe two (76), the outside of desulfurization dust removal case (1) is provided with two stop gear (8), stop gear (8) include sleeve (81).
2. The flue gas desulfurization and dust removal spray device according to claim 1, wherein: an exhaust fan (6) is arranged on the inner wall of the air inlet pipeline (2), a sulfide detection probe (9) is arranged on the inner wall of the exhaust pipeline (3), and two sealing stop blocks (49) matched with the blocking plate (42) are fixedly connected to the inner wall of the exhaust pipeline (3).
3. The flue gas desulfurization and dust removal spray device according to claim 1, wherein: the external surface fixedly connected with slide rail (45) of exhaust duct (3), slide rail (45) and rack (44) sliding connection, the external surface fixedly connected with motor (48) of exhaust duct (3), the output fixedly connected with threaded rod (47) of motor (48), threaded rod (47) and screwed pipe (46) threaded connection, threaded rod (47) and exhaust duct (3) rotate to be connected.
4. The flue gas desulfurization and dust removal spray device according to claim 1, wherein: the desulfurization dust removal device comprises a water tank (71), a filter box (72) is fixedly connected to the outer surface of a desulfurization dust removal box (1), the filter box (72) is fixedly connected to the outer surface of the water tank (71), a filter plate (75) is slidably connected to the inner wall of the filter box (72), a first guide pipe (73) is fixedly connected between the filter box (72) and the desulfurization dust removal box (1), a first water pump (74) is mounted on the outer surface of the first guide pipe (73), and the first water pump (74) is fixedly connected to the outer surface of the water tank (71).
5. The flue gas desulfurization and dust removal spray device according to claim 1, wherein: the second guide pipe (76) penetrates through the outer surface of the water tank (71) and is fixedly connected with the water tank (71), one end, away from the water tank (71), of the second guide pipe (76) is fixedly connected with a spray header (77), a second water pump (78) is mounted on the outer surface of the second guide pipe (76), and the second water pump (78) is fixedly connected with the outer surface of the desulfurization and dust removal box (1).
6. The flue gas desulfurization and dust removal spray device according to claim 4, wherein: the filter is characterized in that the sleeve (81) is fixedly connected to the outer surface of the filter box (72), the inner wall of the sleeve (81) is slidably connected with the plug pin (82), the outer surface of the filter plate (75) is fixedly connected with the plug hole plate (85) matched with the plug pin (82), and the outer surface of the plug pin (82) is fixedly connected with the pull rod (84).
7. The flue gas desulfurization and dust removal spray device according to claim 6, wherein: the sliding groove matched with the pull rod (84) is formed in the outer surface of the sleeve (81), the pull rod (84) is in sliding connection with the sleeve (81) through the sliding groove of the sleeve (81), a telescopic spring (83) is fixedly connected to the outer surface of the bolt (82), and one end, far away from the bolt (82), of the telescopic spring (83) is fixedly connected to the inner wall of the sleeve (81).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322225257.4U CN220779657U (en) | 2023-08-18 | 2023-08-18 | Flue gas desulfurization dust removal spray set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322225257.4U CN220779657U (en) | 2023-08-18 | 2023-08-18 | Flue gas desulfurization dust removal spray set |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220779657U true CN220779657U (en) | 2024-04-16 |
Family
ID=90630674
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322225257.4U Active CN220779657U (en) | 2023-08-18 | 2023-08-18 | Flue gas desulfurization dust removal spray set |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220779657U (en) |
-
2023
- 2023-08-18 CN CN202322225257.4U patent/CN220779657U/en active Active
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