CN105999878A - Gas filter - Google Patents
Gas filter Download PDFInfo
- Publication number
- CN105999878A CN105999878A CN201610503477.0A CN201610503477A CN105999878A CN 105999878 A CN105999878 A CN 105999878A CN 201610503477 A CN201610503477 A CN 201610503477A CN 105999878 A CN105999878 A CN 105999878A
- Authority
- CN
- China
- Prior art keywords
- filter element
- filter
- hole
- cylinder
- housing
- 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.)
- Pending
Links
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
- B01D46/0002—Casings; Housings; Frame constructions
-
- 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
- B01D46/0002—Casings; Housings; Frame constructions
- B01D46/0005—Mounting of filtering elements within casings, housings or frames
- B01D46/0008—Two or more filter elements not fluidly connected positioned in the same housing
-
- 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
- B01D46/0084—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours provided with safety means
- B01D46/0095—Means acting upon failure of the filtering system, e.g. in case of damage of the filter elements; Failsafes
-
- 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
- B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
- B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
- B01D46/2411—Filter cartridges
-
- 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
-
- 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
- B01D46/444—Auxiliary equipment or operation thereof controlling filtration by flow 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
- B01D46/56—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition
- B01D46/62—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition connected in series
- B01D46/64—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition connected in series arranged concentrically or coaxially
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
The invention discloses a gas filter, which comprises a shell and a filter element inside the shell, the size of the filter element is smaller than the internal size of the shell, and a cavity is formed in the shell; a gas inlet communicated with the inside of the filter element and a gas outlet communicated with the cavity are formed in the shell, and the filter element comprises a cylindrical filter layer; wherein the filter element also comprises an inner cylinder arranged on the inner cylindrical surface of the filter layer and an outer cylinder arranged on the outer cylindrical surface of the filter layer in a coated way, and a plurality of through holes are formed in the inner cylinder and the outer cylinder. The flow rate of gas flowing through the filter element is controlled by the number and size of the through holes together, so that the problem that the filter element is easily blocked is solved.
Description
Technical field
The present invention relates to gas filtration technical field, be specifically related to a kind of pneumatic filter.
Background technology
Gas filtration is by being fallen by a large amount of contaminant filters in the presence of gas, to reach the purity requirement of gas, thus keeps away
Exempt from the harm that impurity brings.Such as, the helium in helium compressor is understood with a large amount of mist of oils after compressor compresses, if
These mist of oils do not filter out, then the piston in compressor can be caused drastically to wear and tear, and affect the normal work of machine.
Device for contaminant filter is filter, and filter generally comprises filter element and is sleeved on the housing outside filter element, and
The gas outlet that the air inlet connected with filter element connects with housing.Wherein, filter element is the key point of filter, the knot of filter element
Structure designs, and can directly influence filter effect.In prior art, filter element is only the combination product of multiple layers of filters.Cannot
According to existing filter element, determine the stream pressure that filter operationally can bear, cause filter element to be subject to when filtering gas
Stream pressure is excessive, and final result is that filter element easily blocks.
Chinese invention patent " Combined type mining gas filter " (publication number: 102068862A；Publication date: 2011 5
Months 25 days) in disclose a kind of pneumatic filter, this filter includes housing, filter element and inner core；Described housing is cylinder
Shape, its one end is provided with gas outlet；Described filter element includes filter course, and filter course is by coarse filtration layer, middle filter course, essence filter course
Suit forms successively；Described essence filter course is positioned at innermost layer, and it is peripheral that it is set in inner core, the outside open end of described inner core with
The gas outlet connection of housing, the medial end of described inner core is cecum；Described housing, inner core cylinder on be provided with air inlet,
This air inlet is through hole.It follows that the filter element in this filter only includes filter course, filter course is caused to filter gas
Time, air-flow directly acts on filter course, easily makes filter course deformation even damage.Cannot determine that filter operationally can
The stream pressure born, the pressure that may cause air-flow is excessive, causes filter course to block.
Chinese invention patent " a kind of filter " (publication number: 103405971A；Publication date: on November 27th, 2013)
In disclose a kind of pneumatic filter, this filter includes that housing, filter course and blowoff valve, described housing are provided with air inlet
And gas outlet；Housing bottom is provided with blowoff valve；The internally installed filter course having drum of housing, described filter course with enter
QI KOU connects, and gas outlet connects with enclosure interior；The top of housing is connected fixing by welding with outside installing rack；Housing
Bottom be provided with blowoff valve.It follows that described filter cannot determine the stream pressure that can bear when its work, can
The pressure that can cause air-flow is excessive, causes filter course to block.
Generally speaking, operationally, the gas flow rate flowing through filter element is excessive for existing filter, the air-flow suffered by this filter element
Pressure exceedes the maximum airflow pressure that this filter element can bear, and causes filter element easily to block, and service life is short.
Summary of the invention
The present invention is directed to existing technical problem make improvements, i.e. the technical problem to be solved is to provide a kind of gas
Filter, when this filter can ensure that its work, the stream pressure that filter element is born will not be excessive, solves filter element and easily blocks up
The problem of plug, improves the work efficiency of filter.For solving the problems referred to above, the technical scheme that the present invention provides is:
A kind of pneumatic filter, including housing and the filter element being positioned at enclosure interior, described filter element is smaller in size than described enclosure interior
Size, described enclosure interior forms cavity, and this housing is provided with the air inlet that connect internal with filter element and connects going out of cavity
QI KOU, described filter element includes the filter course of drum, and wherein, described filter element also includes being respectively coated by described filter course
The inner cylinder of periphery and the outer cylinder of described filter course outer cylinder surface, described inner cylinder and outer cylinder are equipped with multiple logical
Hole.
Further, described filter element also includes being covered in the filter element upper cover of described filter course upper surface, being covered under described filter course
The filter element lower cover on surface and the air inlet pipe through through hole set on filter element upper cover, described air inlet is through air inlet pipe and described inner cylinder
Inner space.
Further, described filter element also includes an inner side being sleeved on described inner cylinder and the rotating auxiliary circle being coaxial therewith
Cylinder, described auxiliary cylinder and described inner cylinder matched in clearance, this auxiliary cylinder is provided with multiple through hole, rotates described auxiliary cylinder,
In adjustable auxiliary cylinder, through hole and the through hole overlapping area of through hole on described inner cylinder, adjust the gas flow rate flowing through filter element.
Further, described auxiliary cylinder includes the circular slab lower cover being positioned at its lower end and fixes, with circular slab lower cover, the rotation being connected
Axle, the through hole that this axle is coaxially disposed with auxiliary cylinder and is provided with by described filter element lower cover and housing bottom extends downwardly from.
Further, hole rotating seal ring, described rotary shaft and housing it are provided with between the through hole of described rotary shaft and filter element lower cover
Hole rotating seal ring it is provided with between the through hole of bottom.
Further, described filter element upper cover connects described filter element lower cover by connection strap.
Further, described filter element outer surface is additionally provided with anti-collision structure.
Further, described anti-collision structure is anticollision strip.
Further, described filter course includes filter cotton layer, filter paper layer and the silk screen layer being set with the most successively.
In technique scheme, inner cylinder is set at filter course inner periphery, cylindrical is set at filter course outer cylinder surface
Cylinder, inner cylinder and outer cylinder are equipped with multiple through hole.Density and size co-controlling by these through holes flow through filter element
Gas flow rate.Prevent that gas pressure is excessive to cause damage to filter course.Understand the structure of filter element for convenience, filter element is done into
The description of one step.On this basis, increase by one and flow through the auxiliary cylinder of the gas flow rate of filter element for adjustment further, logical
Cross rotary shaft and change the relative angle between auxiliary cylinder and inner cylinder, make the size of the auxiliary cylinder through hole overlapping with inner cylinder
Size changes.In addition to this it is possible to safety integrally-built to filter element makes improvements, i.e. increase many at filter element outer surface
Individual anticollision strip.Finally, according to specific circumstances filter course can be set to multiple filtration, the mistake being set with the most successively
Filter pulp layer, filter paper layer and silk screen layer, this set effectively can filter for the gas with a large amount of mist of oil impurity.
The invention have the benefit that
1. present invention may determine that when its work, can control to flow through the gas flow rate of filter element, it is ensured that filter element can bear
Gas pressure will not be excessive.Solve filter element and hold susceptible to plugging problem, improve its work efficiency.
2. the present invention operationally can adjust the gas flow rate flowing through filter element further.Further ensure stream pressure not
Can be excessive.
3. the filter element included by the present invention is with collision prevention function.Prevent filter element from being destroyed by outside, improve its safety.
4. the present invention effectively can filter for the gas with a large amount of mist of oil impurity.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of the first embodiment.
Fig. 2 is the overall structure schematic diagram of the second embodiment.
Fig. 3 is enlarged diagram at A in the second embodiment.
Fig. 4 is enlarged diagram at B in the second embodiment.
Detailed description of the invention
Below in conjunction with embodiment and accompanying drawing, the present invention will be further described.
As it is shown in figure 1, the first embodiment of the present invention, a kind of pneumatic filter, including housing 1 and filter element 2, institute
Stating filter element 2 and be positioned at the inside of housing 1, filter element 2 is smaller in size than housing 1 inside dimension, and housing 1 is internally formed cavity.Shell
Body 1 is provided with the air inlet 11 that connect internal with filter element 2 and the gas outlet 12 of connection cavity.
Described filter element 2 includes inner cylinder 20, filter course 21, outer cylinder 22, filter element upper cover 23, filter element lower cover 25, connects
Bar 26, anti-collision structure 27 and air inlet pipe.Filter course 21 is drum.According to practical situation, filter course 21 can be carried out
Arrange, here as a example by removing the mist of oil impurity in helium, filter cotton layer that filter course 21 includes being set with the most successively,
Filter paper layer and silk screen layer.Inner cylinder 20 and outer cylinder 22 are all machined with the multiple through holes being evenly arranged.Inner cylinder 20 is coated with
On the inner periphery of filter course 21, outer cylinder 22 is coated on the outer cylinder surface of filter course 21.Filter element upper cover 23
Covering the upper surface at filter course 21, this filter element upper cover is processed a passage, air inlet pipe passes this passage.Air inlet
Mouth 11 is through air inlet pipe and described inner cylinder 20 inner space.Filter element lower cover 25 is arranged on the lower section of filter course 21.Connection strap
The 26 fixing relative distances connected between filter element upper covers 23 and filter element lower cover 25, and filter element upper cover 23 and filter element lower cover 25 with
The height of filter course 21 is identical.The outer surface of filter element 2 is fixing connects anti-collision structure 27, and hitting assembling structure 27 is multiple anticollision strips.
The feature of the first embodiment:
1. the filter described in present embodiment determines when its work, can control to flow through the gas flow rate of filter element 2, it is ensured that
The gas pressure that filter element 2 can bear will not be excessive.Solve filter element 2 and hold susceptible to plugging problem, improve its work efficiency.
2. the filter element 2 described by present embodiment is with collision prevention function.Prevent filter element 2 from being destroyed by outside, improve it
Safety.
3. present embodiment effectively can filter for the helium with a large amount of mist of oil impurity.
As shown in Figures 2 to 4, modification of the embodiment above:
Described filter element 2 increases an auxiliary cylinder 28, and auxiliary cylinder 28 flows through the gas flow rate of filter element for adjusting further.
Auxiliary cylinder 28 is sleeved on the inner side of described inner cylinder 20 and they are coaxially disposed, i.e. their axis is identical.In auxiliary circle
Processing multiple through hole on cylinder 28, arranging of these through holes is identical with the layout of described inner cylinder 20 through hole.As a example by be easy to rotate
Auxiliary cylinder 28, auxiliary cylinder 28 and inner cylinder 20 matched in clearance.The circle being positioned at its lower end is included in auxiliary cylinder 28
Plate lower cover 281 and the rotary shaft 282 that be connected fixing with on circular slab lower cover 281, this axle is coaxially disposed with auxiliary cylinder 28.
Described filter element lower cover 25 and the equal through hole in housing 1 bottom, rotary shaft 282 is by filter element lower cover 25 and housing 1 bottom
Through hole extends downwardly from.Hole rotating seal ring 251, rotary shaft it is provided with between the through hole of rotary shaft 282 and filter element lower cover 25
282 are provided with hole rotating seal ring 13 with the through hole of housing 1 bottom.
By the relative angle changed between auxiliary cylinder 28 and inner cylinder 20 that rotates of rotary shaft 282, adjustment auxiliary cylinder
Through hole and the through hole overlapping area of through hole on inner cylinder 20 on 28.
The feature of the second embodiment:
Oil filter described in present embodiment operationally can adjust the gas flow rate flowing through filter element 2 further.Further
Ensure that stream pressure will not be excessive.
Above-mentioned all of embodiment is only used for illustrating the principle of the present invention, is not limited to the scope of the present invention.To the present invention also
May be made that other change, such as filter course 21 arrange can according to specific circumstances depending on.These changes still fall
In protection scope of the present invention.
Claims (8)
1. a pneumatic filter, including housing (1) be positioned at the filter element (2) that housing (1) is internal, described filter element (2)
Being smaller in size than described housing (1) inside dimension, described housing (1) is internally formed cavity, and this housing is provided with and filter element (2)
The air inlet (11) of internal connection and the gas outlet (12) of connection cavity, described filter element (2) includes the mistake of drum
Filtering layer (21), it is characterised in that described filter element (2) also includes being respectively coated by described filter course (21) inner periphery
Inner cylinder (20) and the outer cylinder (22) of described filter course (21) outer cylinder surface, described inner cylinder (20) is with outer
Cylinder (22) is equipped with multiple through hole.
2. pneumatic filter as claimed in claim 1, it is characterised in that described filter element (2) also includes being covered in described
The filter element upper cover (23) of filter course (21) upper surface, it is covered in the filter element lower cover (25) of described filter course (21) lower surface
With the air inlet pipe through the upper set through hole of filter element upper cover (23), described air inlet (11) is through air inlet pipe and described inner cylinder (20)
Inner space.
3. pneumatic filter as claimed in claim 2, it is characterised in that described filter element (2) also includes that is sleeved on
The inner side of described inner cylinder (20) and the rotating auxiliary cylinder (28) being coaxial therewith, described auxiliary cylinder (28) with
Described inner cylinder (20) matched in clearance, this auxiliary cylinder is provided with multiple through hole, rotates described auxiliary cylinder (28), adjustable
The through hole overlapping area of the upper through hole of whole auxiliary cylinder (28) through hole upper with described inner cylinder (20), adjusts and flows through filter element (2)
Gas flow rate.
Pneumatic filter as claimed in claim 3, it is characterised in that described auxiliary cylinder (28) includes being positioned at its lower end
Circular slab lower cover (281) and the rotary shaft (282) that be connected fixing with circular slab lower cover (281), this rotary shaft and auxiliary
The through hole that cylinder (28) is coaxially disposed and is provided with by described filter element lower cover (25) and housing (1) bottom extends downwardly from.
4. pneumatic filter as claimed in claim 4, it is characterised in that described rotary shaft (282) and filter element lower cover (25)
Through hole between be provided with hole rotating seal ring (251), between the through hole of described rotary shaft (282) and housing (1) bottom
It is provided with hole rotating seal ring (13).
5. pneumatic filter as claimed in claim 2, it is characterised in that described filter element upper cover (23) passes through connection strap
(26) described filter element lower cover (25) is connected.
6. pneumatic filter as claimed in claim 1, it is characterised in that described filter element (2) outer surface is additionally provided with crashproof
Structure (27).
7. pneumatic filter as claimed in claim 7, it is characterised in that described anti-collision structure (27) is anticollision strip.
8. pneumatic filter as claimed in claim 1, it is characterised in that described filter course (21) includes from inside to outside
Filter cotton layer, filter paper layer and the silk screen layer being set with successively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610503477.0A CN105999878A (en) | 2016-06-29 | 2016-06-29 | Gas filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610503477.0A CN105999878A (en) | 2016-06-29 | 2016-06-29 | Gas filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105999878A true CN105999878A (en) | 2016-10-12 |
Family
ID=57104751
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610503477.0A Pending CN105999878A (en) | 2016-06-29 | 2016-06-29 | Gas filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105999878A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107213709A (en) * | 2017-07-18 | 2017-09-29 | 珠海泰坦新动力电子有限公司 | A kind of environment protection electrolytic solution recovery system |
| CN108057282A (en) * | 2016-11-08 | 2018-05-22 | 那贺株式会社 | The manufacturing method of filter screen |
| CN108057283A (en) * | 2016-11-08 | 2018-05-22 | 那贺株式会社 | Filter screen |
| CN108310867A (en) * | 2017-01-18 | 2018-07-24 | 陕西五洲钒金属材料科技有限公司 | A kind of dust reclaimer in vanadium nitride preparation process |
| CN108380052A (en) * | 2018-01-22 | 2018-08-10 | 山东佳星环保科技有限公司 | Hollow-fibre ultrafiltration device |
| CN110302600A (en) * | 2019-07-18 | 2019-10-08 | 大连中鼎化学有限公司 | A kind of gas purification apparatus |
| CN110354633A (en) * | 2019-07-18 | 2019-10-22 | 大连中鼎化学有限公司 | A method of it is purified for hydrogen, argon gas and helium |
| CN111330934A (en) * | 2020-04-16 | 2020-06-26 | 安徽天通精电新科技有限公司 | Flue gas treatment device for semiconductor patch |
| CN111672229A (en) * | 2020-06-12 | 2020-09-18 | 湖南省骏北科技有限公司 | Indoor air purification system that wisdom classroom was used |
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| FR2267144A1 (en) * | 1974-04-10 | 1975-11-07 | Europ Accumulateurs | Gas filter for solid or liq. particles - with expansion space between cartridges giving improved liq. sepn. |
| EP0087778A2 (en) * | 1982-02-27 | 1983-09-07 | Forschungszentrum Jülich Gmbh | Cyclone for cleaning gases with a filter arranged in the cyclone |
| CN2547381Y (en) * | 2002-06-22 | 2003-04-30 | 葛振贵 | Stainless steel cartridge filter |
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| CN201644368U (en) * | 2010-03-31 | 2010-11-24 | 陕西科技大学 | Sieve capable of regulating sizes of sieve pores |
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| CN203736946U (en) * | 2014-01-16 | 2014-07-30 | 浙江众博矿业机械有限公司 | Filter |
| CN204629800U (en) * | 2015-04-03 | 2015-09-09 | 成都小蛋科技有限公司 | A kind of clarifier avoiding filter net jam |
| CN204762393U (en) * | 2015-05-18 | 2015-11-18 | 贾翠静 | Improved generation flowerpot |
| CN205965285U (en) * | 2016-06-29 | 2017-02-22 | 安徽万瑞冷电科技有限公司 | Gas filter |
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2016
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2267144A1 (en) * | 1974-04-10 | 1975-11-07 | Europ Accumulateurs | Gas filter for solid or liq. particles - with expansion space between cartridges giving improved liq. sepn. |
| EP0087778A2 (en) * | 1982-02-27 | 1983-09-07 | Forschungszentrum Jülich Gmbh | Cyclone for cleaning gases with a filter arranged in the cyclone |
| CN2547381Y (en) * | 2002-06-22 | 2003-04-30 | 葛振贵 | Stainless steel cartridge filter |
| CN201361480Y (en) * | 2009-03-02 | 2009-12-16 | 杭州费尔过滤技术有限公司 | Folding filter element |
| CN201644368U (en) * | 2010-03-31 | 2010-11-24 | 陕西科技大学 | Sieve capable of regulating sizes of sieve pores |
| CN201858053U (en) * | 2010-04-23 | 2011-06-08 | 江朝勋 | Water-washable air filter element for car |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108057282A (en) * | 2016-11-08 | 2018-05-22 | 那贺株式会社 | The manufacturing method of filter screen |
| CN108057283A (en) * | 2016-11-08 | 2018-05-22 | 那贺株式会社 | Filter screen |
| CN108057282B (en) * | 2016-11-08 | 2021-11-23 | 那贺株式会社 | Method for manufacturing filter screen |
| CN108057283B (en) * | 2016-11-08 | 2021-11-23 | 那贺株式会社 | Filter screen |
| CN108310867A (en) * | 2017-01-18 | 2018-07-24 | 陕西五洲钒金属材料科技有限公司 | A kind of dust reclaimer in vanadium nitride preparation process |
| CN107213709A (en) * | 2017-07-18 | 2017-09-29 | 珠海泰坦新动力电子有限公司 | A kind of environment protection electrolytic solution recovery system |
| CN108380052A (en) * | 2018-01-22 | 2018-08-10 | 山东佳星环保科技有限公司 | Hollow-fibre ultrafiltration device |
| CN108380052B (en) * | 2018-01-22 | 2024-02-13 | 山东佳星环保科技有限公司 | Hollow fiber ultrafiltration device |
| CN110302600A (en) * | 2019-07-18 | 2019-10-08 | 大连中鼎化学有限公司 | A kind of gas purification apparatus |
| CN110354633A (en) * | 2019-07-18 | 2019-10-22 | 大连中鼎化学有限公司 | A method of it is purified for hydrogen, argon gas and helium |
| CN111330934A (en) * | 2020-04-16 | 2020-06-26 | 安徽天通精电新科技有限公司 | Flue gas treatment device for semiconductor patch |
| CN111672229A (en) * | 2020-06-12 | 2020-09-18 | 湖南省骏北科技有限公司 | Indoor air purification system that wisdom classroom was used |
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