CN110523174B - High-temperature-resistant pressurized hierarchical composite dust remover - Google Patents
High-temperature-resistant pressurized hierarchical composite dust remover Download PDFInfo
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- CN110523174B CN110523174B CN201910858973.1A CN201910858973A CN110523174B CN 110523174 B CN110523174 B CN 110523174B CN 201910858973 A CN201910858973 A CN 201910858973A CN 110523174 B CN110523174 B CN 110523174B
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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
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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
- B01D46/42—Auxiliary equipment or operation thereof
- B01D46/48—Removing dust other than cleaning filters, e.g. by using collecting trays
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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
- B01D46/54—Particle separators, e.g. dust precipitators, using ultra-fine filter sheets or diaphragms
- B01D46/543—Particle separators, e.g. dust precipitators, using ultra-fine filter sheets or diaphragms using membranes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
- B01D50/20—Combinations of devices covered by groups B01D45/00 and B01D46/00
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
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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
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
The invention provides a high-temperature-resistant pressurized hierarchical composite dust remover, wherein a pressurized air inlet mechanism is arranged on the outer wall along the tangential direction of the wall of the dust remover, the high-temperature-resistant composite dust removing mechanism comprises a ceramic filter sleeve and filter elements, two layers of tube plates are arranged, a dust removing chamber is divided into an upper part, a middle part and a lower part by the tube plates, a plurality of rows of filter elements are hung on the tube plate at the uppermost layer, a plurality of rows of ceramic filter sleeves are hung on the tube plate at the lowermost layer, the filter elements and the ceramic filter sleeves are in one-to-one correspondence, each ceramic filter sleeve is sleeved outside the corresponding filter element, a fine through hole is formed in the filter sleeve, the aperture of the filter sleeve is larger than the aperture of the surface of the filter element, one end of the ceramic filter sleeve is opened and connected with a tube plate flange, one end of the ceramic filter sleeve is opened and connected with a filter sleeve dust removing device, one end of the filter sleeve dust removing device is an air inlet, and the other end of the filter sleeve dust removing device is connected with an ash hopper. The invention has a plurality of dust removing structures to classify and recycle the dust in the flue gas according to the particle size, and has enough pressure to complete multi-stage separation, thereby solving the problem of poor dust removing effect caused by high-temperature damage and insufficient pressure in the prior art.
Description
Technical Field
The invention belongs to the field of dust collectors, and relates to a high-temperature-resistant pressurized hierarchical composite dust collector.
Background
Dust removal systems are commonly used in boilers and industrial production, and dust collectors are important components of the dust removal systems and achieve dust removal effects by separating dust from flue gas. The performance of a precipitator is expressed in terms of the amount of gas that can be treated, the resistance loss of the gas as it passes through the precipitator, and the efficiency of the precipitation. In the existing dust remover, the filter bag is often damaged due to the high temperature of the flue gas, and the expected dust removing effect cannot be achieved. A plurality of dust removing structures in the composite dust remover need to classify and recycle dust in the flue gas according to particle size, and multistage separation cannot be completed due to insufficient pressure. Aiming at the defects of the prior art, the invention aims to provide a high-temperature-resistant pressurized hierarchical composite dust remover to solve the problem of poor dust removing effect caused by high-temperature damage and insufficient pressure in the prior art.
Disclosure of Invention
1. The technical problem to be solved is as follows:
the problem of poor dust removal effect that exists because of high temperature damage among the dust pelletizing system technology of current, pressure is not enough and leads to.
2. The technical scheme is as follows:
aiming at the defects of the prior art, the invention provides a high-temperature-resistant pressurized graded composite dust remover, which comprises a dust removing mechanism and a pressurized air inlet mechanism, the supercharging air inlet mechanism is arranged on the outer wall along the tangential direction of the wall of the dust remover, the dust removing mechanism is a high-temperature resistant composite dust removing mechanism and comprises a ceramic filter sleeve and filter elements, two layers of tube plates are arranged, the tube plates divide a dust removing chamber into an upper part, a middle part and a lower part, the filter elements are hung on the tube plates on the uppermost layer in a plurality of rows, the ceramic filter sleeve is hung on the tube plates on the lowermost layer in a plurality of rows, the filter elements correspond to the ceramic filter sleeves one by one, each ceramic filter sleeve is sleeved outside the corresponding filter element, the filter element filtering sleeve is provided with fine and dense through holes, the hole diameter is larger than the hole diameter of the surface of the filter element, one end of the ceramic filtering sleeve is provided with an opening which is connected with a pipe plate flange, one end of the ceramic filtering sleeve is provided with an opening which is connected with the filtering sleeve ash removal device, one end of the filtering sleeve ash removal device is an air inlet, and the other end of the filtering sleeve ash removal device is connected.
The supercharging air inlet mechanism comprises a bent pipe and a diffuser, a nozzle is arranged at an air outlet of the bent pipe, the diameter of the nozzle is smaller than that of the bent pipe, a throat is arranged in front of an air outlet of the diffuser of the supercharging mechanism, the diameter of the throat is smaller than that of the diffuser, and gas discharged from the nozzle enters the diffuser through the throat.
The filter element is a filter bag type filter element, the filter bag is in a circular shape, and the pore diameter of the micro-pore on the surface of the filter bag is smaller than that of the surface of the filter element.
The filter bag material of filter core is polytetrafluoroethylene.
The ash removal device for the filter sleeve is a cylindrical inclined tube, the ceramic filter sleeve is in a long cylindrical shape, the bottom end of the ceramic filter sleeve is a round angle, the inclined tube is arranged at the bottom of the ceramic filter sleeve and connected with the ceramic filter sleeve, one end of the inclined tube is an air inlet, and the other end of the inclined tube is connected with the ash bucket.
The inclined tube and the horizontal plane form a-degree included angle.
The inclined tubes are provided with a plurality of rows, and the number of the rows is the same as that of the ceramic filter sleeves and the filter elements, and the rows correspond to the positions of the ceramic filter sleeves and the filter elements.
The pipe plate dust cleaning device is arranged on the upper surface of the pipe plate and is an annular pipe, one end of the annular pipe is an air inlet, the other end of the annular pipe is an air outlet, and the surface of the annular pipe is provided with fine holes.
The filter is characterized in that a filter sleeve ash removal cooling device is further arranged, the filter sleeve ash removal cooling device is an annular pipe, the annular pipe penetrates through the ceramic filter sleeve and surrounds the filter bag of the filter element, a plurality of micropores are formed in the lower surface of the annular pipe, one end of the annular pipe is an air inlet, and the other end of the annular pipe is an air outlet.
The dust removing device is characterized by further comprising a pulse back-blowing dust removing device, wherein the pulse back-blowing dust removing device is located above the filter element, the pulse back-blowing dust removing device is provided with injection tubes, the number of the injection tubes is equal to that of the filter elements, each injection tube corresponds to a filter bag of one filter element, the injection tubes extend into the half to two thirds of the filter bag, and fine holes are formed in the surface of the body of each injection tube extending into the filter bag.
3. Has the advantages that:
the filtering link of the high-temperature-resistant pressurized graded composite dust remover with the particle grading system provided by the invention consists of three filtering links, wherein the first level is that a working medium rises spirally, and dust is removed by centrifugal force to treat larger particles in smoke. The second stage is high temperature resistant ceramic membrane filter sleeve filtration, the temperature for treating smoke dust is high, and after air cooling treatment, the secondary temperature can be reached, so that preparation is made for the third stage of medium and low temperature filtration, the third stage adopts filter bag type filter element filtration design as a secondary filtration link, and refined retreatment is performed on the second stage of filtration. The problem of exist among the current dust pelletizing system technology because of high temperature damage, the dust removal effect that pressure is not enough and lead to is poor is solved.
Drawings
Fig. 1 is a first structural diagram of the present invention.
FIG. 2 is a second schematic structural diagram of the present invention.
Fig. 3 is a schematic structural diagram of an intake air supercharging mechanism.
Fig. 4 is a schematic diagram of a filter bag type filter element structure.
FIG. 5 is a schematic diagram of the tube sheet structure of the filter element and the filter bag.
FIG. 6 is a schematic view of a filter sleeve ash removal cooling device.
FIG. 7 is a schematic view of the cartridge ash removal cooling device passing through a ceramic filter sleeve.
1-an intake air supercharging mechanism; 2-high temperature resistant composite dust removing mechanism; 3-a particle classification system; 4-a filter sleeve ash removal device; 5-ceramic filter sleeve; 6-a filter bag type filter element; 7-pulse back-blowing ash removal; 8-a tube plate ash removal device; 9-a filter sleeve ash removal cooling device; 10-ash bucket; 12-a nozzle; 13-bending the pipe; 14-larynx all; 15-diffuser.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings.
As shown in fig. 1 and 2, a high temperature resistant pressurized graded composite dust collector comprises a dust collection mechanism and a pressurized air inlet mechanism 1, wherein the pressurized air inlet mechanism 1 is installed on the outer wall along the tangential direction of the wall of the dust collector cylinder, the dust collection mechanism is a high temperature resistant composite dust collection mechanism 2, and comprises a ceramic filter sleeve 5 and a filter element 6, two layers of tube plates are arranged, the tube plates divide a dust collection chamber into an upper part, a middle part and a lower part, a plurality of rows of tube plates at the upmost layer hang the filter element 6, a plurality of rows of tube plates at the lowest layer hang the ceramic filter sleeve 5, as shown in fig. 5, the filter element 6 and the ceramic filter sleeve 5 are in one-to-one correspondence, each ceramic filter sleeve 5 is sleeved outside the corresponding filter element 6, the filter sleeve 5 is provided with a fine through hole, the hole diameter is larger than the surface hole diameter of the filter element 6, one end of the ceramic filter sleeve 5 is connected with a tube plate flange, one end of the ceramic filter sleeve is opened and connected with a filter sleeve ash removal device 4, one end of the filter sleeve device is an air inlet, the other end is connected with an ash bucket 10.
After a certain pressure is increased by the air inlet supercharging mechanism 1, a working medium needing dust removal is sent into the dust remover along the tangential direction of the cylinder wall to form spiral ascending type dust removal, and larger particulate matters and dust are filtered to the ash bucket 10 at the lowest end at the stage to finish primary particle classification. And the rest working media enter the middle part of the dust remover to carry out high-temperature resistant composite dust removal 2. The working medium enters the ceramic membrane filter sleeve 5 from the small hole on the ceramic membrane filter sleeve 5, and the particles and dust which can not pass through are filtered to the ash bucket 10 at the lowest part. The working medium entering the ceramic membrane filter sleeve 5 continues to contact the filter element 6 upwards under the action of pressure. The working medium enters the filter element 6 from the micropores on the surface of the filter element 6 for three times of filtration, and particulate matters and dust which cannot pass through the micropores are filtered to the filter sleeve ash removal device 4 with the middle part connected with the lower end of the ceramic membrane filter sleeve 5. The final filtered gas is obtained.
The filter element filtering sleeve 5 is provided with fine through holes for the following functions: after the primary dust removal, secondary filtration is carried out, and gas with less dust can be obtained. The ceramic filter sleeve 5 is made of high-temperature-resistant material, can normally work under the condition of filtering high-temperature smoke, and avoids the direct contact between the filter element which is not high in temperature resistance and the high-temperature smoke. Reducing the damage rate of the device.
For better supercharging and air intake effect, as shown in fig. 3, the supercharging and air intake mechanism 1 comprises a bend 13 and a diffuser 15, a nozzle 12 is arranged at the air outlet of the bend 13, the diameter of the nozzle 12 is smaller than that of the bend 13, a throat 14 is arranged in front of the air outlet of the diffuser 15 of the supercharging and air intake mechanism 1, the diameter of the throat 14 is smaller than that of the diffuser 15, and the air discharged from the nozzle 12 enters the diffuser 15 through the throat 14.
When the pressurizing air inlet mechanism 1 conveys the working medium into the dust remover, a part of air enters the dust remover from the air inlet of the elbow 13, and the other part of air enters the dust remover from the suction pipe. The gas in the suction pipe enters the diffuser through the throat, and the throat 14 is smaller in diameter than the inlet, so that the gas obtains higher pressure when entering the diffuser 15. The gas in the elbow 13 is discharged from the nozzle 12 and then enters the throat 14, and finally enters the dust remover from the diffuser 15, because the diameter of the nozzle 12 is smaller than that of the elbow 13, the gas obtains higher pressure when being discharged from the nozzle 12, because the diameter of the throat 14 is smaller than that of the nozzle 12, the gas is boosted again when entering the diffuser 15 from the throat 14, the gas entering the dust remover is ensured to have high enough pressure, and the three-time grading dust removal can be ensured. All working media all follow the dust remover barrel tangential direction and get into the dust remover, guarantee that all media extend the section of thick bamboo wall spiral and rise, great particulate matter is separated away through centrifugal force at the in-process that rises, accomplishes once and filters, and the particulate matter that is filtered all is accomplished once and is retrieved in falling on the ash bucket of lower extreme.
For better effect, as shown in fig. 4, the filter element 6 is a filter bag type filter element, the filter bag is in the shape of a circular filter bag, and the pore diameter of the micro-pore on the surface of the filter bag is smaller than that of the surface of the filter element 6. And the gas filtered from the ceramic filter sleeve enters the filter element for secondary filtration to obtain the purest gas filtered for three times.
The ash removal device for the filter sleeve is characterized in that the ash removal device 4 for the filter sleeve is a cylindrical inclined tube, the ceramic filter sleeve 5 is in a long cylindrical shape, the bottom end of the ceramic filter sleeve 5 is a round angle, all inclined tubes are arranged at the bottom of the ceramic filter sleeve 5 and connected with the ceramic filter sleeve, one end of each inclined tube is an air inlet, and the other end of each inclined tube is connected with the ash hopper 10.
The bottom end of the ceramic filter sleeve 5 is made into a round angle and is connected with the connecting surface of the inclined tube in an inclined plane mode, the round angle and the inclined plane are matched to realize sealing of the round angle and the inclined plane, and solid particles can be prevented from entering the inclined tube. Can get into ceramic filter sleeve 5, the dust that can not get into filter core 6 is arranged into the pipe chute from ceramic filter sleeve 5 bottom, accomplishes the secondary filter, and there is high-pressure gas filter sleeve ash removal device 4 one side, can arrange into the ash bucket with the filter residue in the pipe chute, accomplishes the secondary particle and retrieves.
For better effect, the inclined tube and the horizontal plane form an included angle of 10-20 degrees.
The inclined tubes are provided with a plurality of rows, and the number of the rows is the same as that of the ceramic filter sleeves 5 and that of the filter elements 6, and the rows correspond to the positions of the filter elements.
The upper surface of the tube plate is provided with a tube plate ash removal device 8, the tube plate ash removal device 8 is an annular tube, one end of the annular tube is an air inlet, the other end of the annular tube is an air outlet, and the surface of the annular tube is provided with pores. In the working process, the fine holes on the surface of the annular tube are sprayed with gas, and dust which is accumulated on the upper surface of the tube plate and cannot enter the filter bag is blown into the filter element.
The dust-removing and dust-removing device is further provided with a filter sleeve dust-removing cooling device 9, the filter sleeve dust-removing cooling device 9 adopts an annular pipe for blowing, as shown in figures 6 and 7, an annular pipeline penetrates through the ceramic filter sleeve and surrounds the filter element to blow the outer surface of the filter element, wherein the lower surface of the annular pipe is provided with a plurality of micropores, and low-temperature high-pressure gas passes through the pipe, so that on one hand, the gas is blown out to blow out dust blocked in the pores of the ceramic filter sleeve, on the other hand, the high-temperature gas in the ceramic filter element is reduced, and the filter element is prevented from being damaged by high temperature.
When the dust removal process is carried out, the dust-containing gas carries the particles to flow through the filter layer, a part of particles permeate into the filter medium, but most of the particles are intercepted on the surface of the filter layer and gradually accumulated into a dust layer along with the filtering, the dust layer on the filter element is slowly accumulated thickly, the equipment resistance continuously rises, and once the equipment resistance reaches a set value, the pulse back-blowing dust cleaning device is started. Under the action of electromagnetic pulse signals, the pulse valve is opened, high-pressure gas quickly flows through the injection pipe and then flows into filter elements such as filter bags.
Taking the filter element 6 as an example, the pulse back-blowing ash removal device 7 is communicated with the filter element 6 through a blowing pipe, and the blowing pipe extends into the filter element, so that one-to-one high-efficiency ash removal can be realized by the structure, and the blowing effect is enhanced. High-pressure low-temperature blowing gas is introduced from external equipment and flows into the blowing pipe and the filter tip, so that the filter bag is reversely blown, and periodic work is realized under the control of the pulse valve. On one hand, the dust blocked in the micropores of the filter element is blown off, and the blown off dust falls into the filter sleeve ash removal device to finish secondary particle classification. On the other hand, the low-temperature blowing gas can effectively reduce the temperature of the filter element, and prevent the high-temperature gas passing through the filter sleeve from being too high in temperature and exceeding the bearing temperature limit of the filter element to be damaged.
Although the present invention has been described with reference to the preferred embodiments, it should be understood that various changes and modifications can be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. The utility model provides a high temperature resistant pressure boost hierarchical formula composite dust remover, includes dust removal mechanism, its characterized in that: the dust removal device is characterized by further comprising a pressurizing air inlet mechanism (1), wherein the pressurizing air inlet mechanism (1) is installed on the outer wall along the tangential direction of the wall of the dust remover cylinder, the dust removal mechanism is a high-temperature-resistant composite dust removal mechanism (2) and comprises a ceramic filter sleeve (5) and a filter core (6) and is provided with two layers of tube plates, the tube plates divide a dust removal chamber into an upper part, a middle part and a lower part, the filter core (6) is hung on the tube plate multi-row of the uppermost layer, the ceramic filter sleeve (5) is hung on the tube plate multi-row of the lowermost layer, the filter core (6) and the ceramic filter sleeve (5) are in one-to-one correspondence, each ceramic filter sleeve (5) is sleeved outside the corresponding filter core (6), a fine through hole is formed in the ceramic filter sleeve (5), the hole diameter is larger than the surface hole diameter of the filter core (6), one end opening of the ceramic filter sleeve (5) is connected with a tube plate flange, one end opening is connected with a filter sleeve ash removal device (4), and one end of the filter sleeve ash removal device (4) is an air inlet, the other end is connected with an ash bucket (10).
2. The high-temperature-resistant pressurized staged composite dust collector as claimed in claim 1, wherein: the supercharging air inlet mechanism (1) comprises an elbow (13) and a diffuser (15), a nozzle (12) is arranged at an air outlet of the elbow (13), the diameter of the nozzle (12) is smaller than that of the elbow (13), a throat pipe (14) is arranged in front of an air outlet of the diffuser (15) of the supercharging air inlet mechanism (1), the diameter of an outlet of the throat pipe (14) is smaller than that of the diffuser (15), and gas discharged from the nozzle (12) enters the diffuser (15) from an outlet of the throat pipe (14).
3. The high-temperature-resistant pressurized staged composite dust collector as claimed in claim 1, wherein: the filter element (6) is a filter bag type filter element, and the filter bag is in a circular shape.
4. The high-temperature-resistant pressurized staged composite dust collector as claimed in claim 3, wherein: the filter bag material of the filter element (6) is polytetrafluoroethylene.
5. The high-temperature-resistant pressurized staged composite dust collector as claimed in claim 1, wherein: the ash removal device for the filter sleeve (4) is a cylindrical inclined tube, the ceramic filter sleeve (5) is in a long cylindrical shape, the bottom end of the ceramic filter sleeve (5) is a round angle, the bottom of the ceramic filter sleeve (5) is connected with the inclined tube, one end of the inclined tube is an air inlet, and the other end of the inclined tube is connected with the ash hopper (10).
6. The high-temperature-resistant pressurized staged composite dust collector as claimed in claim 5, wherein: the inclined tube and the horizontal plane form an included angle of 10-20 degrees.
7. The high-temperature-resistant pressurized staged composite dust collector as claimed in claim 5 or 6, wherein: the inclined tubes are provided with a plurality of rows, the number of the rows is the same as that of the ceramic filter sleeves (5) and the filter elements (6), and the positions of the rows correspond to those of the ceramic filter sleeves.
8. The high-temperature-resistant pressurized staged composite dust collector as claimed in any one of claims 1 to 6, wherein: the pipe plate dust cleaning device is characterized in that a pipe plate dust cleaning device (8) is arranged on the upper surface of the pipe plate, the pipe plate dust cleaning device (8) is an annular pipe, one end of the annular pipe is an air inlet, the other end of the annular pipe is an air outlet, and pores are formed in the surface of the annular pipe.
9. The high-temperature-resistant pressurized staged composite dust collector as claimed in any one of claims 3 to 6, wherein: still be equipped with and strain cover deashing cooling device (9), strain cover deashing cooling device (9) and be the ring conduit, the ring conduit passes ceramic filter cover (5) and is enclosing the filter bag of filter core (6), a plurality of micropores have been seted up to the ring conduit lower surface, ring conduit one end is the air intake, and the other end is the air outlet.
10. The high-temperature-resistant pressurized staged composite dust collector as claimed in any one of claims 3 to 6, wherein: the dust removing device is characterized by further comprising a pulse back-blowing dust removing device (7), wherein the pulse back-blowing dust removing device (7) is located above the filter element (6), the pulse back-blowing dust removing device (7) is provided with injection pipes equal to the number of the filter elements (6), each injection pipe corresponds to a filter bag of one filter element (6) in communication, each injection pipe extends into one half to two thirds of the filter bag, and the surface of the injection pipe extending into the filter bag is provided with a fine hole.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910858973.1A CN110523174B (en) | 2019-09-11 | 2019-09-11 | High-temperature-resistant pressurized hierarchical composite dust remover |
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| CN201910858973.1A CN110523174B (en) | 2019-09-11 | 2019-09-11 | High-temperature-resistant pressurized hierarchical composite dust remover |
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| CN110523174B true CN110523174B (en) | 2021-08-24 |
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Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19527311A1 (en) * | 1995-07-26 | 1997-01-30 | Lurgi Lentjes Babcock Energie | Method and device for cleaning dust-laden gas |
| HUE061240T2 (en) * | 2013-03-04 | 2023-06-28 | Donaldson Co Inc | Air filter systems and methods of using the same |
| AR100119A1 (en) * | 2014-03-21 | 2016-09-14 | Haldor Topsoe As | MOUNTING FILTER BAGS |
| CN206473957U (en) * | 2017-05-10 | 2017-09-08 | 河南省安阳县太行机械有限责任公司 | A kind of pig iron foundry furnace with dust arrester |
| CN208927796U (en) * | 2018-09-03 | 2019-06-04 | 江苏赛图新材料科技有限公司 | Ultralow discharge low-resistance filtering device |
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