CN110681224B - A buggy filters collection device for coal bed gas exploitation - Google Patents
A buggy filters collection device for coal bed gas exploitation Download PDFInfo
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- CN110681224B CN110681224B CN201911098063.4A CN201911098063A CN110681224B CN 110681224 B CN110681224 B CN 110681224B CN 201911098063 A CN201911098063 A CN 201911098063A CN 110681224 B CN110681224 B CN 110681224B
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- filter bag
- oscillating
- coal
- electromagnet
- coal bed
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- 239000003245 coal Substances 0.000 title claims abstract description 72
- 230000010355 oscillation Effects 0.000 claims abstract description 34
- 238000001914 filtration Methods 0.000 claims abstract description 26
- 238000004140 cleaning Methods 0.000 claims abstract description 5
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 14
- 239000002817 coal dust Substances 0.000 claims description 13
- 238000007789 sealing Methods 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 238000005065 mining Methods 0.000 claims description 4
- 230000008602 contraction Effects 0.000 claims description 2
- 239000000843 powder Substances 0.000 abstract description 17
- 238000000034 method Methods 0.000 abstract description 7
- 230000000903 blocking effect Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 4
- 239000000428 dust Substances 0.000 abstract description 3
- 238000009423 ventilation Methods 0.000 abstract description 3
- 238000005406 washing Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000001133 acceleration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
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Classifications
-
- 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
-
- 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
- B01D46/0039—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with flow guiding by feed or discharge devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/02—Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
- B01D46/04—Cleaning filters
-
- 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
- B01D46/44—Auxiliary equipment or operation thereof controlling filtration
- B01D46/446—Auxiliary equipment or operation thereof controlling filtration by pressure measuring
-
- 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
- B01D46/66—Regeneration of the filtering material or filter elements inside the filter
- B01D46/70—Regeneration of the filtering material or filter elements inside the filter by acting counter-currently on the filtering surface, e.g. by flushing on the non-cake side of the filter
-
- 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
- B01D46/66—Regeneration of the filtering material or filter elements inside the filter
- B01D46/74—Regeneration of the filtering material or filter elements inside the filter by forces created by movement of the filter element
- B01D46/76—Regeneration of the filtering material or filter elements inside the filter by forces created by movement of the filter element involving vibrations
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/34—Arrangements for separating materials produced by the well
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
The invention discloses a pulverized coal filtering and collecting device for coal bed gas exploitation, which can filter and collect pulverized coal in coal bed gas in a filter bag mode, prevent pulverized coal on the filter bag from blocking the ventilation and filtration of the filter bag in the collecting process, ensure the filtering effect and the passing performance of the coal bed gas by arranging an oscillating assembly, ensure that the coal bed gas smoothly passes through the filter bag, and prevent the pulverized coal from blocking the coal bed gas; the oscillation amplitude of the oscillation assembly can be adjusted, so that the oscillation amplitude can be adjusted according to the smoothness of coal bed gas passing through the filter bag by the coal powder, the filtering effect of the coal powder is improved, and meanwhile, the coal powder on the filter bag is prevented from being dispersed into the coal bed gas due to excessive oscillation, so that the filtering strength is increased; the invention can well clean the filter bag, adopts cleaning solution to clean, and is simple and convenient; the vibration of the invention adopts an electromagnetic mode, has simple structure and can adapt to the severe environment with more dust in the coal powder of the coal bed gas.
Description
Technical Field
The invention relates to the technical field of coal bed gas exploitation, in particular to a pulverized coal filtering and collecting device for coal bed gas exploitation.
Background
Coal dust is produced in the coal bed gas exploitation process, and for coal dust, the coal dust is produced by a mechanism that the geological characteristics of the coal bed determine that the coal dust is produced in the engineering disturbance process and the like. Coal bed geological features (such as coal rock components, inorganic mineral components, deterioration degree, coal body structure and the like) are basic conditions for coal dust generation, and engineering disturbance (such as fracturing, drilling, perforating, discharging and mining and the like) is an inducing factor for coal dust generation. In the drainage and depressurization process of coal bed gas development, the drainage and production degree is unreasonable, the drainage and production strength is high, the gas production and acceleration are fast, and the bottom-hole pressure fluctuation can also influence the generation of coal dust. In the process of exploiting the coal bed gas, the coal powder is required to be collected and treated, otherwise, the coal powder is easily deposited in the seepage channel and blocked, and once the blockage occurs, the coal powder deposited in the channel can be driven by larger hydrodynamic force to dredge the seepage channel, and the phenomena of pump blockage and the like are easily caused to influence the exploitation efficiency and exploitation performance of the coal bed gas.
Therefore, the invention provides a coal powder filtering and collecting device for coal bed gas exploitation, so as to solve the problems in the background art.
Disclosure of Invention
The invention aims to provide a coal powder filtering and collecting device for coal bed gas exploitation, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a pulverized coal filtering and collecting device for coal bed gas exploitation comprises an outer cylinder base, a sealing end cover, a filter bag and a waterproof oscillator, and is characterized in that the sealing end cover is detachably arranged at one end of the outer cylinder base, the filter bag is further arranged in the outer cylinder base, an air inlet end is arranged in the lower end of the filter bag, the air inlet end is communicated with an air inlet pipe, the air inlet pipe extends out of the lower end of the outer cylinder base, at least one air outlet pipe extending into the outer cylinder base is arranged at the upper end of the outer cylinder base, and the air outlet pipe is communicated with a cavity formed between the inner wall of the outer cylinder base and the outer wall of the filter bag;
the filter bag is internally provided with a waterproof oscillator connected to the inner wall of the outer cylinder seat, the waterproof oscillator can realize the oscillation action of the filter bag, and the oscillation amplitude of the waterproof oscillator is adjustable.
Further, as preferred, the fixed connecting seat that is provided with on end cover's the inner wall, detachable connection is provided with the horn seat on the connecting seat, cross filter bag fixed connection be in on the horn seat, waterproof oscillator's one end is connected and is set up on the horn seat, the inboard of horn seat is located cross inside at least one pressure sensor that is provided with of filter bag, when pressure sensor surpassed and set for the threshold value, then show that needs clear up the buggy on the filter bag, just pressure sensor's pressure value is big more, then waterproof oscillator's oscillation amplitude is big more.
Further, as preferred, be provided with the control valve in the intake pipe, when clearing up the buggy on the filter bag, will the control valve is closed, just the outlet duct can communicate with the washing liquid pump, end cover's upper end still is connected with the outlet pipe, outlet pipe and washing liquid collection tank intercommunication, filter bag the upper end with the junction of outlet pipe is provided with out the water control valve.
Further, preferably, the connection part of the lower end of the filter bag and the air inlet pipe is connected together by an elastic corrugated pipe.
Further, as a preferred option, the waterproof oscillator includes an oscillating ball assembly and an oscillating bar, wherein the oscillating bar is a plurality of, and one end of the oscillating bar is connected to the oscillating ball assembly along the radial direction of the oscillating ball assembly, and the other end of the oscillating bar is connected to the corner base or the filter bag.
Further, as a preferred option, the oscillating ball assembly includes an outer elastic waterproof ball, an inner spherical shell seat, an outer oscillating electromagnet, a first inner radial electromagnet and a second inner radial electromagnet, wherein the inner spherical shell seat is concentrically arranged inside the outer elastic waterproof ball, a plurality of spaced outer oscillating electromagnets are arranged on the inner wall of the inner spherical shell seat, each oscillating rod is connected with the respective outer oscillating electromagnet in a one-to-one correspondence manner, the oscillating rod extends outwards from the outer elastic waterproof ball, the center of the inner spherical shell seat is provided with the first inner radial electromagnet and the second inner radial electromagnet which extend in the radial direction, the extending directions of the first inner radial electromagnet and the second inner radial electromagnet are perpendicular to each other, the outer oscillating electromagnet is oppositely arranged with the first inner radial electromagnet or the second inner radial electromagnet, and the magnetic pole directions of the first inner radial electromagnet and the second inner radial electromagnet are unchanged, the magnetic pole direction of each external oscillation electromagnet I is variable, and the oscillation of the oscillation ball assembly is realized by changing the magnetic pole direction of the external oscillation electromagnet I.
Further, as a preferred option, a magnetostrictive rod is arranged inside the outer elastic waterproof ball on each oscillating rod, the magnetostrictive rod is arranged in a finely adjustable manner, and the oscillation amplitude of the oscillating rod is adjusted by adjusting the expansion and contraction of the magnetostrictive rod.
Further, preferably, the oscillating rods are six in number, two of the oscillating rods are combined into a group with the same axis and extend along the radial direction of the oscillating ball assembly, and the three groups are arranged perpendicular to each other along the axis.
Compared with the prior art, the invention has the beneficial effects that:
(1) the mode of the filter bag of the invention realizes the filtration and collection of the coal dust in the coal bed gas, and prevents the coal dust on the filter bag from blocking the ventilation filtration of the filter bag in the collection process;
(2) the oscillation amplitude of the oscillation assembly can be adjusted, so that the oscillation amplitude can be adjusted according to the smoothness of coal bed gas passing through the filter bag by the coal powder, the filtering effect of the coal powder is improved, and meanwhile, the coal powder on the filter bag is prevented from being dispersed into the coal bed gas due to overlarge oscillation, so that the filtering strength is increased;
(3) the invention can well clean the filter bag, adopts cleaning solution to clean, and is simple and convenient;
(4) the vibration of the invention adopts an electromagnetic mode, has simple structure and can adapt to the severe environment with more dust in the coal powder of the coal bed gas.
Drawings
FIG. 1 is a schematic overall structure diagram of a pulverized coal filtering and collecting device for coal bed methane mining;
FIG. 2 is a schematic diagram of the internal structure of an oscillating ball assembly in a pulverized coal filtering and collecting device for coal bed methane mining;
fig. 3 is an appearance structure diagram of an oscillating assembly in a coal dust filtering and collecting device for coal bed methane exploitation.
Detailed Description
Referring to fig. 1 to 3, in the embodiment of the invention, a pulverized coal filtering and collecting device for coal bed gas exploitation comprises an outer cylinder base 1, a sealing end cover 2, a filter bag 3 and a waterproof oscillator 9, and is characterized in that one end of the outer cylinder base 1 is detachably provided with the sealing end cover 2, the filter bag 3 is further arranged in the outer cylinder base 1, an air inlet end is arranged in the lower end of the filter bag 3 and is communicated with an air inlet pipe 13, the air inlet pipe 13 extends out of the lower end of the outer cylinder base 1, the upper end of the outer cylinder base 1 is provided with at least one air outlet pipe 6 extending into the outer cylinder base 1, and the air outlet pipe 6 is communicated with a cavity formed between the inner wall of the outer cylinder base 1 and the outer wall of the filter bag;
the filter bag 3 is inside still be provided with connect in the waterproof oscillator 9 of outer cylinder base inner wall, waterproof oscillator 9 can realize right the oscillation action of filter bag 3, just the amplitude of oscillation of waterproof oscillator 9 is adjustable setting.
In this embodiment, as shown in fig. 1, the fixed connecting seat 8 that is provided with on the inner wall of end cover 2, detachable connection is provided with angle seat 5 on the connecting seat 8, filter 3 fixed connection of bag on the angle seat 5, waterproof oscillator's one end is connected and is set up on the angle seat 5, the inboard of angle seat 5 is located filter bag inside is provided with at least one pressure sensor 4, when pressure sensor 4 exceeded the settlement threshold value, then it needs to clear up the buggy on the filter bag to indicate, just pressure sensor 4's pressure value is big more, then waterproof oscillator's oscillation amplitude is big more.
Be provided with control valve 12 in the intake pipe 13, when clearing up the buggy on crossing filter bag 3, will control valve 12 closes, just outlet duct 6 can communicate with washing liquid pump (not shown in the figure), end cover's upper end still is connected with outlet pipe 7, outlet pipe 7 and washing liquid collection tank intercommunication, the upper end of crossing filter bag 3 with the junction of outlet pipe is provided with out the water control valve.
In a preferred embodiment, the connection between the lower end of the filter bag and the air inlet pipe is connected together by an elastic bellows 11. The waterproof oscillator 9 comprises an oscillating ball assembly and an oscillating rod 10, wherein the oscillating rod 10 is multiple, one end of the oscillating rod is connected to the oscillating ball assembly along the radial direction of the oscillating ball assembly, and the other end of the oscillating rod is connected to the corner seat or the filter bag.
Specifically, in the present invention, the oscillating ball assembly includes an outer elastic waterproof ball 14, an inner spherical shell seat 15, an outer oscillating electromagnet 18, an inner radial electromagnet one 16 and an inner radial electromagnet two 17, wherein the inner spherical shell seat 15 is concentrically disposed inside the outer elastic waterproof ball 14, a plurality of spaced outer oscillating electromagnets 18 are disposed on an inner wall of the inner spherical shell seat 15, each oscillating rod 10 is connected to the respective outer oscillating electromagnet one by one, the oscillating rod 10 extends outward from the outer elastic waterproof ball 14, an inner radial electromagnet one 16 and an inner radial electromagnet two 17 extending in a radial direction are disposed at a center of the inner spherical shell seat 15, extension directions of the inner radial electromagnet one 16 and the inner radial electromagnet two 17 are perpendicular to each other, and the outer oscillating electromagnet is disposed opposite to the inner radial electromagnet one or the inner radial electromagnet two, and the magnetic pole directions of the inner radial electromagnet I and the inner radial electromagnet II are unchanged, the magnetic pole direction of each outer oscillating electromagnet I18 is arranged in a variable mode, and oscillation of the oscillating ball assembly is achieved by changing the magnetic pole direction of the outer oscillating electromagnet I.
In order to adjust the oscillation amplitude conveniently, a magnetostrictive rod 19 is arranged inside the outer elastic waterproof ball on each oscillating rod, the magnetostrictive rod 19 can be arranged in a fine-tuning telescopic mode, and the oscillation amplitude of the oscillating rod can be adjusted by adjusting the telescopic performance of the magnetostrictive rod. The oscillating rod is six, and two by two are a set of same axis and extend along the radial direction of oscillating ball subassembly, and three sets of along axis mutually perpendicular arrangement.
The mode of the filter bag of the invention realizes the filtration and collection of the coal dust in the coal bed gas, and prevents the coal dust on the filter bag from blocking the ventilation filtration of the filter bag in the collection process; the oscillation amplitude of the oscillation assembly can be adjusted, so that the oscillation amplitude can be adjusted according to the smoothness of coal bed gas passing through the filter bag by the coal powder, the filtering effect of the coal powder is improved, and meanwhile, the coal powder on the filter bag is prevented from being dispersed into the coal bed gas due to overlarge oscillation, so that the filtering strength is increased; the invention can well clean the filter bag, adopts cleaning solution to clean, and is simple and convenient; the vibration of the invention adopts an electromagnetic mode, has simple structure and can adapt to the severe environment with more dust in the coal powder of the coal bed gas.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention are equivalent to or changed within the technical scope of the present invention.
Claims (5)
1. A pulverized coal filtering and collecting device for coal bed gas exploitation comprises an outer cylinder base, a sealing end cover, a filter bag and a waterproof oscillator, and is characterized in that the sealing end cover is detachably arranged at one end of the outer cylinder base, the filter bag is further arranged in the outer cylinder base, an air inlet end is arranged in the lower end of the filter bag and is communicated with an air inlet pipe, the air inlet pipe extends out of the lower end of the outer cylinder base, at least one air outlet pipe extending into the outer cylinder base is arranged at the upper end of the outer cylinder base, and the air outlet pipe is communicated with a cavity formed between the inner wall of the outer cylinder base and the outer wall of the filter bag;
the interior of the filter bag is also provided with a waterproof oscillator connected to the inner wall of the outer cylinder seat, the waterproof oscillator can realize the oscillation action of the filter bag, and the oscillation amplitude of the waterproof oscillator is adjustable;
the inner wall of the sealing end cover is fixedly provided with a connecting seat, the connecting seat is detachably connected with an angle seat, the filter bag is fixedly connected with the angle seat, one end of the waterproof oscillator is connected with the angle seat, the inner side of the angle seat is positioned in the filter bag and is provided with at least one pressure sensor, when the pressure sensor exceeds a set threshold value, the coal dust on the filter bag needs to be cleaned, and the larger the pressure value of the pressure sensor is, the larger the oscillation amplitude of the waterproof oscillator is;
the waterproof oscillator comprises a plurality of oscillating rods and an oscillating ball assembly, wherein one end of each oscillating rod is connected to the oscillating ball assembly along the radial direction of the oscillating ball assembly, and the other end of each oscillating rod is connected to the angle seat or the filter bag;
the oscillating ball component comprises an outer elastic waterproof ball, an inner spherical shell seat, an outer oscillating electromagnet, an inner radial electromagnet I and an inner radial electromagnet II, wherein the inner spherical shell seat is concentrically arranged in the outer elastic waterproof ball, a plurality of spaced outer oscillating electromagnets are arranged on the inner wall of the inner spherical shell seat, each oscillating rod is connected with the respective outer oscillating electromagnet in a one-to-one correspondence manner, the oscillating rods extend out of the outer elastic waterproof ball outwards, the center of the inner spherical shell seat is provided with the inner radial electromagnet I and the inner radial electromagnet II which extend along the radial direction, the extension directions of the inner radial electromagnet I and the inner radial electromagnet II are mutually vertical, the outer oscillating electromagnet is oppositely arranged with the inner radial electromagnet I or the inner radial electromagnet II, and the magnetic pole directions of the inner radial electromagnet I and the inner radial electromagnet II are unchanged, the magnetic pole direction of each external oscillation electromagnet is variable, and the oscillation of the oscillation ball assembly is realized by changing the magnetic pole direction of the external oscillation electromagnet.
2. The pulverized coal filtering and collecting device for coal bed methane exploitation according to claim 1, wherein a control valve is arranged on the air inlet pipe, when pulverized coal on the filter bag is cleaned, the control valve is closed, the air outlet pipe can be communicated with a cleaning liquid pump, a water outlet pipe is further connected to the upper end of the sealing end cover, the water outlet pipe is communicated with a cleaning liquid collecting tank, and a water outlet control valve is arranged at the connection position of the upper end of the filter bag and the water outlet pipe.
3. The pulverized coal filtering and collecting device for coal bed methane exploitation according to claim 1, wherein the connection between the lower end of the filter bag and the air inlet pipe is connected together by an elastic corrugated pipe.
4. The pulverized coal filtering and collecting device for coal bed methane exploitation according to claim 1, wherein a magnetostrictive rod is arranged inside the outer elastic waterproof ball on each oscillating rod, the magnetostrictive rod is arranged in a finely adjustable manner, and the adjustment of the oscillation amplitude of the oscillating rod is realized by adjusting the expansion and contraction of the magnetostrictive rod.
5. The pulverized coal filtering and collecting device for coal bed methane mining according to claim 4, wherein the number of the oscillating rods is six, two oscillating rods are combined into a group with the same axis and extend along the radial direction of the oscillating ball assembly, and the three groups of oscillating rods are arranged perpendicular to each other along the axis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911098063.4A CN110681224B (en) | 2019-11-08 | 2019-11-08 | A buggy filters collection device for coal bed gas exploitation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911098063.4A CN110681224B (en) | 2019-11-08 | 2019-11-08 | A buggy filters collection device for coal bed gas exploitation |
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| Publication Number | Publication Date |
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| CN110681224A CN110681224A (en) | 2020-01-14 |
| CN110681224B true CN110681224B (en) | 2021-12-21 |
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| CN201911098063.4A Active CN110681224B (en) | 2019-11-08 | 2019-11-08 | A buggy filters collection device for coal bed gas exploitation |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111335867B (en) * | 2020-04-26 | 2022-01-25 | 濮阳市轮通机械设备修造有限公司 | Auxiliary filtering device for coal bed gas exploitation |
| CN111821776A (en) * | 2020-07-10 | 2020-10-27 | 中海油能源发展股份有限公司 | A buggy filters collection device for coal bed gas exploitation |
| CN111911130B (en) * | 2020-07-15 | 2021-05-28 | 中国地质大学（北京） | Coal bed gas is opened and is adopted outer purifier that arranges of buggy |
| CN112316681A (en) * | 2020-10-16 | 2021-02-05 | 杭州国泰环保科技股份有限公司 | In-furnace desulfurization system and operation method thereof |
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| US4518404A (en) * | 1982-08-06 | 1985-05-21 | Michael Vaillant | Apparatus for generating an aerosol |
| CN102764746A (en) * | 2012-08-20 | 2012-11-07 | 戴若夫 | Vibrator capable of shaking off accumulated dust on dust filtering core through electromagnetic vibration |
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|---|---|
| CN110681224A (en) | 2020-01-14 |
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