CN210138538U - Bag-type dust collector for purifying calcium carbide furnace gas - Google Patents
Bag-type dust collector for purifying calcium carbide furnace gas Download PDFInfo
- Publication number
- CN210138538U CN210138538U CN201920743548.3U CN201920743548U CN210138538U CN 210138538 U CN210138538 U CN 210138538U CN 201920743548 U CN201920743548 U CN 201920743548U CN 210138538 U CN210138538 U CN 210138538U
- Authority
- CN
- China
- Prior art keywords
- partition plate
- dust removal
- dust
- tank
- movable partition
- 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.)
- Expired - Fee Related
Links
- 239000000428 dust Substances 0.000 title claims abstract description 123
- 239000005997 Calcium carbide Substances 0.000 title claims description 17
- CLZWAWBPWVRRGI-UHFFFAOYSA-N tert-butyl 2-[2-[2-[2-[bis[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]amino]-5-bromophenoxy]ethoxy]-4-methyl-n-[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]anilino]acetate Chemical compound CC1=CC=C(N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)C(OCCOC=2C(=CC=C(Br)C=2)N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)=C1 CLZWAWBPWVRRGI-UHFFFAOYSA-N 0.000 title claims description 17
- 238000005192 partition Methods 0.000 claims abstract description 69
- 238000007664 blowing Methods 0.000 claims abstract description 10
- 239000007789 gas Substances 0.000 claims description 46
- 239000004744 fabric Substances 0.000 claims description 18
- 238000009413 insulation Methods 0.000 claims description 12
- 239000002912 waste gas Substances 0.000 claims description 11
- 238000001816 cooling Methods 0.000 claims description 9
- 238000000746 purification Methods 0.000 claims description 9
- 239000010865 sewage Substances 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims description 4
- 239000000498 cooling water Substances 0.000 claims description 4
- 239000011810 insulating material Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000004887 air purification Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 239000011280 coal tar Substances 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000011269 tar Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Images
Landscapes
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
The utility model provides a sack cleaner for carbide burner gas purifies, including the dust removal jar, dust removal jar lateral wall symmetry is equipped with two intake pipes, the intake pipe communicates with each other with outside exhaust pipe, be equipped with solenoid valve A in the intake pipe, upper portion is equipped with horizontal baffle in the dust removal jar, be equipped with vertical baffle in the middle of the bottom of horizontal baffle, evenly be equipped with the standing groove on the horizontal baffle, the standing groove has hung the dust removal sack, be equipped with the gas-supply pipe on the horizontal baffle, be equipped with solenoid valve B on the gas-supply pipe, the gas-supply pipe bottom evenly is equipped with the blowing mouth of aiming at the standing groove, it is equipped with the slide rail to correspond on the inner wall around the dust removal jar, sliding connection has a movable partition on the slide rail, movable partition's length is 1.5 times of slide rail length, be. The utility model discloses can use the dust removal sack in different regions alternately, avoid the overheated phenomenon of device to appear guaranteeing the incessant condition of dust removal work.
Description
Technical Field
The utility model relates to an air purification equipment technical field, concretely relates to a sack cleaner for carbide burner gas purifies.
Background
The bag type dust collector is a dry type dust filtering device. It is suitable for trapping fine, dry, non-fibrous dust. The filter bag is made of woven filter cloth or non-woven felt, the dust-containing gas is filtered by the filtering action of the fiber fabric, after the dust-containing gas enters the bag type dust collector, dust with large particles and large specific gravity falls into the dust hopper due to the sedimentation of the gravity, and when the gas containing fine dust passes through the filter material, the dust is blocked, so that the gas is purified. The tail gas of the calcium carbide furnace is the tail gas produced in the process of producing the calcium carbide, the main components of the tail gas comprise nitrogen, methane, carbon monoxide, hydrogen and impurities, and the calcium carbide industry is the industry with high energy consumption and high pollution. Because of the rich tar and the difficult problem in the industry of purification of calcium carbide furnace gas, the furnace gas is purified by a dry method and then is recycled into an effective purification use mode at present, and a bag type dust collector is a key device for purifying waste gas by the dry method. Because the temperature of the calcium carbide furnace gas is too high, the calcium carbide furnace gas introduced into the device for a long time can cause the device to be overheated, and dust, coal tar and the like with strong adhesive force exist in the calcium carbide furnace gas, the dust removal capacity of the dust removal cloth bag is reduced and difficult to recover after the calcium carbide furnace gas is used for a long time, and the dust removal efficiency is affected by stopping supplying air to clean the dust removal cloth bag, so that the production is delayed.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a can deal with high temperature carbide furnace gas, the convenient and sustainable sack cleaner who carries out exhaust-gas treatment's carbide furnace gas purification of clearance.
The technical scheme of the utility model as follows:
the utility model relates to a sack cleaner for carbide burner gas purifies, its characterized in that: the dust removal device comprises a dust removal tank, wherein the dust removal tank is a hollow rectangular column, an ash bucket is connected to the bottom of the dust removal tank, an air outlet is formed in the middle of the top of the dust removal tank, a filter screen is arranged in the air outlet, and a sewage outlet is formed in the bottom of the ash bucket; the bottom of the side wall of the dust removing tank is symmetrically provided with two air inlet pipes, the openings of the air inlet pipes in the dust removing tank are downward, the air inlet pipes penetrate through the dust removing tank and are connected with an external waste gas pipe, a spiral cooling pipe is wound around the waste gas pipe, cooling water is introduced into the cooling pipe, and the part of the air inlet pipes outside the dust removing tank is provided with an electromagnetic valve A; a horizontal partition plate is arranged at the upper part in the dust removing tank, a vertical partition plate is arranged in the middle of the bottom of the horizontal partition plate, and the vertical partition plate is parallel to the width direction of the dust removing tank; the dust removal tank is characterized in that a placing groove is uniformly formed in the horizontal partition plate, the placing groove penetrates through the upper portion and the lower portion of the horizontal partition plate, a dust removal cloth bag is hung in the placing groove, a gas pipe is arranged on the horizontal partition plate and is connected with an external gas source, a solenoid valve B is arranged on the part, outside the dust removal tank, of the gas pipe, a blowing opening is uniformly formed in the bottom of the gas pipe, and the blowing opening is aligned to the placing groove; sliding rails along the length direction of the dust removing tank are correspondingly arranged on the front inner wall and the rear inner wall of the dust removing tank, two ends of each sliding rail respectively support against the left inner wall and the right inner wall of the dust removing tank, movable partition plates are connected onto the sliding rails in a sliding mode, the length of each movable partition plate is 1.5 times that of each sliding rail, movable holes for the movable partition plates to penetrate through are formed in the dust removing tank, the shapes of the movable holes are consistent with the cross sections of the movable partition plates, and the top surfaces of the movable partition plates are tightly attached to the bottoms of the vertical partition plates; the movable partition plate is characterized in that two sides of the movable partition plate in the length direction are provided with vertically-through rectification grid plates, a heat insulation plate is arranged between the two rectification grid plates, the heat insulation plate and the two rectification grid plates are equally divided by the movable partition plate, and handles are arranged on the left outer side wall and the right outer side wall of the movable partition plate.
The number of the gas transmission pipes is two, and the gas transmission pipes are symmetrically arranged along the axis of the dust removal tank.
The handle is made of heat insulating materials.
And a control module is arranged outside the dust removal tank and is connected with the electromagnetic valve A and the electromagnetic valve B through a lead.
The dust removal tank is provided with temperature sensors on the inner walls of two spaces separated by the vertical partition plate, and the temperature sensors are connected with the control module through leads.
The left end and the right end of the movable partition plate are provided with limiting pieces, and the limiting pieces stretch out of the movable partition plate to avoid exposure of the movable holes.
The utility model discloses the beneficial technological effect who has: the utility model cools the calcium carbide furnace gas before entering the dust removal tank, reduces the heat brought into the dust removal tank, reduces the overheating risk and prolongs the service life; the dust removal cloth bag area in the dust removal tank is equally divided into two parts, when the temperature sensor detects that the area is overheated, the area is communicated to a standby area through the electromagnetic valve A and the movable partition plate in a switching mode, the overheated area is timely dedusted and cooled by the blowing opening, dedusting work can be normally carried out in the period, and dedusting efficiency is guaranteed.
Drawings
The technical solution of the present invention will be further explained with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a rear view of the present invention.
Fig. 3 is a top view of the movable partition board of the present invention.
Figure 4 is the connecting structure diagram of the middle intake pipe and the waste gas pipe of the utility model.
In the figure: 1-a dust removal tank, 2-an ash bucket, 3-an air outlet, 4-a filter screen, 5-a sewage draining outlet, 6-an air inlet pipe, 7-an exhaust gas pipe, 8-a cooling pipe, 9-an electromagnetic valve A, 10-an electromagnetic valve B, 11-a placement groove, 12-a horizontal clapboard, 13-a vertical clapboard, 14-an air conveying pipe, 15-a blowing opening, 16-a sliding rail, 17-a movable clapboard, 18-a movable hole, 19-a rectification grid plate, 20-a heat insulation plate, 21-a handle, 22-a control module, 23-a lead, 24-a temperature sensor, 25-a limiting piece, 26-a dust removal cloth bag and 261-the dust removal cloth bag area.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1 to 4, the utility model relates to a bag-type dust collector for purification of calcium carbide furnace gas, which is characterized in that: the dust removing device comprises a dust removing tank 1, wherein the dust removing tank 1 is a hollow rectangular column, an ash bucket 2 is connected to the bottom of the dust removing tank 1, an air outlet 3 is formed in the middle of the top of the dust removing tank 1, a filter screen 4 is arranged in the air outlet 3, and a sewage outlet 5 is formed in the bottom of the ash bucket 2; the bottom of the side wall of the dust removing tank 1 is symmetrically provided with two air inlet pipes 6, the openings of the air inlet pipes 6 in the dust removing tank 1 are downward, the air inlet pipes 6 penetrate through the dust removing tank 1 and are connected with an external waste gas pipe 7, a spiral cooling pipe 8 is wound around the waste gas pipe 7, cooling water is introduced into the cooling pipe 8, and the part of the air inlet pipes 6 outside the dust removing tank 1 is provided with an electromagnetic valve A9; a horizontal partition plate 12 is arranged at the upper part in the dust removing tank 1, a vertical partition plate 13 is arranged in the middle of the bottom of the horizontal partition plate 12, and the vertical partition plate 13 is parallel to the width direction of the dust removing tank 1; the horizontal partition plate 12 is uniformly provided with a placing groove 11, the placing groove 11 penetrates through the upper part and the lower part of the horizontal partition plate 12, the dust removal cloth bag 26 is hung on the placing groove 11, the horizontal partition plate 12 is provided with an air conveying pipe 14, the air conveying pipe 14 is connected with an external air source, the part of the air conveying pipe 14 outside the dust removal tank 1 is provided with an electromagnetic valve B10, the bottom of the air conveying pipe 14 is uniformly provided with a blowing opening 15, and the blowing opening 15 is aligned to the placing groove 11; the front inner wall and the rear inner wall of the dust removing tank 1 are correspondingly provided with slide rails 16 along the length direction of the dust removing tank 1, the left inner wall and the right inner wall of the dust removing tank 1 are respectively propped against by two ends of each slide rail 16, the slide rails 16 are connected with movable partition plates 17 in a sliding manner, the length of each movable partition plate 17 is 1.5 times of that of each slide rail 16, the dust removing tank 1 is provided with movable holes 18 for the movable partition plates 17 to penetrate through, the shapes of the movable holes 18 are consistent with the cross sections of the movable partition plates 17, and the top surfaces of the movable; the two sides of the movable partition plate 17 in the length direction are provided with rectification grid plates 19 which are communicated up and down, the movable partition plate 17 is provided with a heat insulation plate 20 between the two rectification grid plates 19, the heat insulation plate 20 and the two rectification grid plates 19 are respectively divided into the movable partition plate 17, and the left outer side wall and the right outer side wall of the movable partition plate 17 are provided with handles 21.
The number of the air conveying pipes 14 is two, and the air conveying pipes 14 are symmetrically arranged by the axis of the dust removing tank 1.
The handle 21 is made of a heat insulating material.
A control module 22 is arranged outside the dust removing tank 1, and the control module 22 is connected with a solenoid valve A9 and a solenoid valve B10 through a lead 23.
The dust removing tank 1 is provided with temperature sensors 24 on the inner walls of two spaces separated by the vertical partition plate 13, and the temperature sensors 24 are connected with the control module 22 through leads 23.
The left end and the right end of the movable partition plate 17 are provided with limiting pieces 25, and the limiting pieces 25 extend out of the movable partition plate 17 to avoid exposure of the movable hole 18.
The working principle of the example is as follows:
the dust removal principle is as follows: the waste gas enters the dust removing tank 1 through the waste gas pipe 7 and the gas inlet pipe 6, rises upwards, passes through the rectification grid plate 19, then reaches the dust removing cloth bag region 261, is filtered by the dust removing cloth bag 26, then enters the region above the horizontal partition plate 12 from the placing groove 11, and finally leaves the dust removing tank 1 from the gas outlet 3.
The exhaust gas pipe 7 is wound with a cooling pipe 8 which is communicated with cooling water, and the exhaust gas is cooled in one step before entering the dust removing tank 1, so that the cooling burden of the dust removing tank 1 is reduced.
The vertical partition plate 13 divides the dust collection bag region 261 into two parts, because the middle of the movable partition plate 17 is the heat insulation plate 20 which is not communicated with the upper part and the lower part, and the length of the heat insulation plate 20 and the length of the rectification grid plate 19 are both half of the length of the dust collection tank 1, when the rectification grid plate 19 is aligned with one dust collection bag region 261, the other dust collection bag region 261 is sealed by the heat insulation plate 20, and no waste gas passes through and is reserved for use.
When the temperature sensor 24 detects that the temperature of the dust removal cloth bag region 261 in use is higher than the preset temperature in the control module 22, the control module 22 sends a signal to remind an operator to control the movable partition plate 17, the overheated dust removal cloth bag region 261 is sealed by the heat insulation plate 20, and the rectification grid plate 19 is aligned to the spare dust removal cloth bag region 261. The control module 22 controls the solenoid valve a9 on the inlet pipe 6 below the rectification grid 19 to open at this time, and exhaust gas is supplied. Meanwhile, the control module 22 controls the electromagnetic valve B10 on the gas pipe 14 above the overheated dust removal cloth bag region 261 to be opened, the blowing port 15 makes airflow impact on the placing groove 11, so that heat dissipation of the overheated dust removal cloth bag region 261 is facilitated, dust on the dust removal cloth bag 26 is knocked down at the same time, the dust falls onto the heat insulation plate 20, when an operator pulls the movable partition plate 17 again, the dust can be swept onto the adjacent rectification grid plate 19 by the vertical partition plate 13, and then the dust falls onto the ash bucket 2 below through the rectification grid plate 19 and finally leaves from the sewage outlet 5.
The limiting piece 25 can prevent the left end and the right end of the movable clapboard 17 from being pulled into the dust removal tank 1, so that the movable hole 18 is exposed, and dust is leaked.
The above is only a specific application example of the present invention, and does not constitute any limitation to the protection scope of the present invention. All the technical solutions formed by equivalent transformation or equivalent replacement fall within the protection scope of the present invention.
Claims (6)
1. A sack cleaner for carbide burner gas purifies which characterized in that: the dust removal device comprises a dust removal tank, wherein the dust removal tank is a hollow rectangular column, an ash bucket is connected to the bottom of the dust removal tank, an air outlet is formed in the middle of the top of the dust removal tank, a filter screen is arranged in the air outlet, and a sewage outlet is formed in the bottom of the ash bucket; the bottom of the side wall of the dust removing tank is symmetrically provided with two air inlet pipes, the openings of the air inlet pipes in the dust removing tank are downward, the air inlet pipes penetrate through the dust removing tank and are connected with an external waste gas pipe, a spiral cooling pipe is wound around the waste gas pipe, cooling water is introduced into the cooling pipe, and the part of the air inlet pipes outside the dust removing tank is provided with an electromagnetic valve A; a horizontal partition plate is arranged at the upper part in the dust removing tank, a vertical partition plate is arranged in the middle of the bottom of the horizontal partition plate, and the vertical partition plate is parallel to the width direction of the dust removing tank; the dust removal tank is characterized in that a placing groove is uniformly formed in the horizontal partition plate, the placing groove penetrates through the upper portion and the lower portion of the horizontal partition plate, a dust removal cloth bag is hung in the placing groove, a gas pipe is arranged on the horizontal partition plate and is connected with an external gas source, a solenoid valve B is arranged on the part, outside the dust removal tank, of the gas pipe, a blowing opening is uniformly formed in the bottom of the gas pipe, and the blowing opening is aligned to the placing groove; sliding rails along the length direction of the dust removing tank are correspondingly arranged on the front inner wall and the rear inner wall of the dust removing tank, two ends of each sliding rail respectively support against the left inner wall and the right inner wall of the dust removing tank, movable partition plates are connected onto the sliding rails in a sliding mode, the length of each movable partition plate is 1.5 times that of each sliding rail, movable holes for the movable partition plates to penetrate through are formed in the dust removing tank, the shapes of the movable holes are consistent with the cross sections of the movable partition plates, and the top surfaces of the movable partition plates are tightly attached to the bottoms of the vertical partition plates; the movable partition plate is characterized in that two sides of the movable partition plate in the length direction are provided with vertically-through rectification grid plates, a heat insulation plate is arranged between the two rectification grid plates, the heat insulation plate and the two rectification grid plates are equally divided by the movable partition plate, and handles are arranged on the left outer side wall and the right outer side wall of the movable partition plate.
2. The bag-type dust collector for calcium carbide furnace gas purification according to claim 1, characterized in that: the number of the gas transmission pipes is two, and the gas transmission pipes are symmetrically arranged along the axis of the dust removal tank.
3. The bag-type dust collector for calcium carbide furnace gas purification according to claim 1, characterized in that: the handle is made of heat insulating materials.
4. The bag-type dust collector for calcium carbide furnace gas purification according to claim 1, characterized in that: and a control module is arranged outside the dust removal tank and is connected with the electromagnetic valve A and the electromagnetic valve B through a lead.
5. The bag-type dust collector for calcium carbide furnace gas purification according to claim 4, characterized in that: the dust removal tank is provided with temperature sensors on the inner walls of two spaces separated by the vertical partition plate, and the temperature sensors are connected with the control module through leads.
6. The bag-type dust collector for calcium carbide furnace gas purification according to claim 1, characterized in that: the movable partition plate is characterized in that limiting pieces are arranged at the left end and the right end of the movable partition plate, and the limiting pieces stretch out of the movable partition plate to prevent the movable hole from being exposed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920743548.3U CN210138538U (en) | 2019-05-23 | 2019-05-23 | Bag-type dust collector for purifying calcium carbide furnace gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920743548.3U CN210138538U (en) | 2019-05-23 | 2019-05-23 | Bag-type dust collector for purifying calcium carbide furnace gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210138538U true CN210138538U (en) | 2020-03-13 |
Family
ID=69733825
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920743548.3U Expired - Fee Related CN210138538U (en) | 2019-05-23 | 2019-05-23 | Bag-type dust collector for purifying calcium carbide furnace gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210138538U (en) |
-
2019
- 2019-05-23 CN CN201920743548.3U patent/CN210138538U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106318472B (en) | A kind of high temperature dust coal gas dust-extraction unit | |
| CN103301743B (en) | Flue gas integral dry waste removing system and flue gas waste removing and back washing method | |
| CN210138538U (en) | Bag-type dust collector for purifying calcium carbide furnace gas | |
| CN210543862U (en) | Secondary dust removal chamber for clean production of crude copper smelting furnace | |
| CN103028302A (en) | Integrated multi-purification device for dust containing sticky material like tar | |
| CN210138534U (en) | High-temperature efficient filter bag dust collector | |
| CN209173677U (en) | A kind of ceramic kiln dry-type vent gas purification apparatus | |
| CN210968339U (en) | Waste collecting device of sander | |
| CN209392962U (en) | A kind of plastic cement smelting furnace emission-control equipment | |
| CN209877677U (en) | Ceramic kiln tail gas aftertreatment device | |
| CN205995182U (en) | A kind of granular gas purifier exempting from blowback | |
| CN108502850B (en) | Smoke and dust clean system is used in sulphuric acid production | |
| KR20100069822A (en) | One-touch silica filter bag by copper powder melting method and its manufacturing method, dust collecting apparatus for reduction of dust loading using thereof | |
| CN205760253U (en) | A kind of inverse type catalysis filter bag decomposing two English | |
| CN221005989U (en) | Converter flue gas degree of depth waste heat recovery dry-type dust pelletizing system | |
| CN113546484A (en) | Pulse blowback ceramic adsorption dust remover | |
| CN218421711U (en) | Industrial automation produces dust collecting equipment | |
| CN220257489U (en) | Hydrogen recovery device | |
| CN219784124U (en) | Cement calcination flue gas purification device | |
| CN210332132U (en) | Dust removing device of plasma melting furnace | |
| CN211245823U (en) | Sack cleaner for industrial production | |
| CN215085569U (en) | Asphalt flue gas treatment device for asphalt mixing station | |
| CN213555936U (en) | High-efficient blast furnace dust collector | |
| CN210186727U (en) | Production is with industrial silicon equipment that smoke abatement removed dust | |
| CN212818683U (en) | Improve gas permeability and filter fineness's dust removal sack |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200313 |