CN107042036A - Back-blowing dust removing device and reverse gas cleaning system - Google Patents
Back-blowing dust removing device and reverse gas cleaning system Download PDFInfo
- Publication number
- CN107042036A CN107042036A CN201710293333.1A CN201710293333A CN107042036A CN 107042036 A CN107042036 A CN 107042036A CN 201710293333 A CN201710293333 A CN 201710293333A CN 107042036 A CN107042036 A CN 107042036A
- Authority
- CN
- China
- Prior art keywords
- dust removing
- filter
- removing device
- blowing dust
- tubular
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
- B01D46/66—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
- B01D46/71—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 with pressurised gas, e.g. pulsed air
-
- 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
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2267/00—Multiple filter elements specially adapted for separating dispersed particles from gases or vapours
- B01D2267/30—Same type of filters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2267/00—Multiple filter elements specially adapted for separating dispersed particles from gases or vapours
- B01D2267/70—Horizontal arrangement
Abstract
The invention discloses a kind of back-blowing dust removing device.The back-blowing dust removing device is used for the reverse gas cleaning of tubular filter, the tubular filter includes outside filter membrane, the internal outlet passageway for supporting the support frame of the filter membrane and being formed in the support frame, the back-blowing dust removing device includes the anti-blowpipe matched with the length of the tubular filter being located in the outlet passageway, the air outlet structure that the anti-blowpipe includes body, the air inlet on body and turns on the air inlet and outlet passageway；The air outlet structure includes venthole.First, evenly, ash-removal effect is good and is hardly damaged filter membrane for the bearing up-down force of filter membrane；Next, therefore the noise produced during use is smaller；Furthermore, damping will not be produced, filter efficiency is not interfered with.
Description
Technical field
The present invention relates to reverse gas cleaning field, in particular to back-blowing dust removing device and reverse gas cleaning system.
Background technology
Tubular filter is a kind of common filter, generally includes the filter medium of outside, internal is used to support
The support frame of the filter medium and the outlet passageway being formed in the support frame, thing to be filtered are usually located at tubular type
The outside of filter, the clean gas of gained is discharged from outlet passageway after filter media, and intercepted by filter medium
Solid particle is then attached to the outside of tubular filter.For the filter assemblies constituted with multiple tubular filters, then use
Orifice plate makes the outlet side of each tubular filter be connected with corresponding hole.Due to the hole of these solid particles meeting blocking filtering medium
Gap, so that the air flux of filter medium is significantly reduced, causes filter pressure to be obviously improved, therefore, when solid particle is run up to
Then need to carry out deashing processing using back-blowing dust removing device when to a certain degree.
Existing back-blowing dust removing device generally uses venturi tube, the blowback air entrance and tubular filter of the venturi tube one end
Top connection, and the blowback air of the other end outlet then be located at tubular filter inside, by make from blowback air export flow out
Opposite direction of the blowback air along the filtering direction of filter medium move and realize that the solid particle for making accumulation is peeled off with filter medium.
Then, this reverse gas cleaning mode has the following disadvantages：1) because venturi tube is located at the top of tubular filter, therefore, along
The length direction of tubular filter, the tolerance of blowback air is from top to bottom successively decreased；Because the tolerance on top is excessive, when filter medium is
During relatively thin filter membrane, filter medium is easy to be blown bad；Because bottom tolerance is too small, cause the filter media surface of bottom
Ash-removal effect is bad；2) noise that Venturi tube is produced brings new noise pollution to enterprise again；3) style characteristic of venturi tube
And installation site can bring certain damping to filter process, so as to be had a certain impact to the flux of filter medium；4)
Due to tubular filter, suffered blowback atmospheric pressure is different everywhere, the swing of filter medium is caused, so that abradable seal face, shadow
Ring filter efficiency and service life；5) because the outlet side of venturi tube and tubular filter is connected, orifice plate is caused to also need to bear
The weight of venturi tube, therefore usually require to use thicker orifice plate to reach higher endurance.
The content of the invention
It is a primary object of the present invention to provide back-blowing dust removing device and reverse gas cleaning system, to solve in the prior art
Ash-removal effect that deashing device is present is poor, influence the life-span of filter and the problem of filter efficiency.
There is provided a kind of back-blowing dust removing device to achieve these goals.The back-blowing dust removing device is used for tubular filter
Reverse gas cleaning, the tubular filter includes outside filter membrane, the internal support frame for being used to support the filter membrane
And be formed at the outlet passageway in the support frame, the back-blowing dust removing device include being located in the outlet passageway with
The anti-blowpipe of the length matching of the tubular filter, the anti-blowpipe includes body, the air inlet on body and made
The air outlet structure of air inlet and the outlet passageway conducting；The air outlet structure includes venthole.
Firstly, since the length of anti-blowpipe and the length of tubular filter match, thus can make filter membrane up and down by
Evenly, ash-removal effect is good and is hardly damaged filter membrane for power；Secondly as the shape of anti-blowpipe is more regular, therefore used
The noise produced in journey is smaller；Furthermore, due to anti-blowpipe regular shape, therefore the flowing resistance of clean gas everywhere in outlet passageway
Power is identical, will not produce damping, and due to there is multiple ventholes, therefore the flow resistance caused to clean gas is also very micro-
It is weak, do not interfere with filter efficiency.
Further, the air outlet structure includes the multiple outlet cells arranged along the length direction of the body, each
Outlet cell includes multiple ventholes of annular spread.Thus, multiple outlets are arranged with along the length direction of the body
Unit, therefore blowback air source distribution is evenly, can make the bearing up-down force of filter membrane evenly, ash-removal effect is good and is hardly damaged
Filter membrane；The outlet cell of multiple ventholes with annular spread can further lift ash-removal effect.
Further, the spacing of two neighboring outlet cell is 0.2-0.8m.When the spacing of two neighboring outlet cell is low
When above-mentioned number range, illustrate that the quantity of venthole is more so that flowed out under identical blowback gross pressure at each venthole
The reduction of blowback air pressure, influence is capable of the thickness of deashing；When the spacing of two neighboring outlet cell is higher than above-mentioned numerical value model
When enclosing, it may cause the subregion of filter membrane can not be by deashing.Thus, when the spacing of two neighboring outlet cell is 0.2-
0.8m, can have higher deashing thickness and more uniform ash-removal effect concurrently.
Further, the inner size of the venthole is less than outer end size.Thus, one carrys out the diverging knot due to venthole
Structure, therefore can not only increase the active area for the blowback air for going out outflow from venthole, two can to lift adjacent venthole defeated
The interaction of the blowback air gone out, turbulization effect, makes deashing more thorough and comprehensive.
Further, the venthole of two neighboring outlet cell is spaced, for example, going out through n-th outlet cell
Stomata and the line parallel with the central shaft of tubular filter can be through in two venthole lines of the N+1 outlet cell
The center of two venthole lines of the heart and the N-1 outlet cell.Thus, the turbulence effects of gas are good and deashing more comprehensively.
Further, in addition to the body and the tubular filter are made with the positioner of central shaft.Thus, made
Filter membrane is everywhere more uniformly stressed.
Further, the positioner includes locating rod, and one end of the locating rod is connected with its bottom, separately
One end at the support frame bottom centre with being connected.Thus it can be realized and positioned by locating rod.
Further, the locating rod inserts embedding connection with its bottom.Thus, it is easy to the dismounting of body.
Further, in addition to the fixing device that prevents the body from rocking.Thus, one it can prevent in filter process
Body is impacted to filter efficiency, and two can prevent that filter membrane occurs damaged or made because of discontinuity during blowback
Deashing is imperfect.
Further, the fixing device includes the inside retainer ring matched with the external diameter of the body and is connected across institute
State the connecting rod between support frame and the internal retainer ring；The fixing device at least is set in the upper end of the body.By
This, realizes the dismounting of body while realizing positioning.
Further, 0.5-0.8 times of the external diameter of the body equal to the internal diameter of the tubular filter；When the body
External diameter be less than above-mentioned number range when, can cause the dissipation of blowback air increases, so that soot blowing effect is reduced, when the body
When external diameter is higher than above-mentioned number range, can cause the flow resistance of clean gas increases, so as to reduce filter efficiency.Thus, when
The external diameter of the body is equal to 0.5-0.8 times of the internal diameter of the tubular filter, can have good filter efficiency concurrently and clear
Grey effect.
Further, the body includes from top to bottom inserting the first body of embedding connection, the second body and the 3rd pipe successively
Body.Thus, the back-blowing dust removing device can also be used when tubular filter is made up of multistage；At this point it is possible to the first body,
The fixing device is respectively provided between second body and the 3rd body and support frame.
To achieve these goals, a kind of reverse gas cleaning system is additionally provided.The reverse gas cleaning system is used for tubular filter
The deashing processing of device assembly, the tubular filter device assembly includes orifice plate and at least one tubular type mistake being connected with the orifice plate
Filter, the reverse gas cleaning system includes the air supply manifold being located above the orifice plate and the spray being connected with the air supply manifold
Blowpipe, the quantity of the injection tube and the quantity of the tubular filter match, it is characterised in that：Also include and the tubular type
The above-mentioned back-blowing dust removing device that the quantity of filter matches, the air inlet of the back-blowing dust removing device is led with corresponding injection tube
It is logical.
In addition to having the advantages that above-mentioned back-blowing dust removing device is brought, because anti-blowpipe is not connected with orifice plate, and
It is to be connected with air supply manifold, therefore compared with prior art, the pressure that the orifice plate in reverse gas cleaning system of the invention is born is bright
Aobvious reduction, you can with using the orifice plate with thinner thickness.
Further, the body is docked with the injection tube using clamp connection or flange.As a result, body and spray
The adhesion of blowpipe is stronger, difficult for drop-off.Further, before using clamp connection or flange docking, rubber can be used
Plug is attached, and good sealing is ensured while pre-connection positioning to realize.
It can be seen that, back-blowing dust removing device of the invention is simple in construction, can make the bearing up-down force of filter membrane evenly, ash-removal effect
Well, it is hardly damaged the noise produced during filter membrane, use smaller, damping will not be produced, filter efficiency is not interfered with.This hair
The pressure that orifice plate in bright reverse gas cleaning system is born substantially is reduced, you can with using the orifice plate with thinner thickness.
The present invention is described further with reference to the accompanying drawings and detailed description.The additional aspect of the present invention and excellent
Point will be set forth in part in the description, and partly will become apparent from the description below, or pass through the practice of the present invention
Solve.
Brief description of the drawings
Constitute the part of the present invention accompanying drawing be used for aiding in content provided in the understanding of the present invention, accompanying drawing and its
Explanation relevant in the present invention can be used for explaining the present invention, but not constitute inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is the use state figure of reverse gas cleaning system.
Fig. 2 is the use state figure of the back-blowing dust removing device of embodiment 1.
Fig. 3 be in Fig. 2 A-A to sectional view.
Fig. 4 is B-B direction sectional view in Fig. 2.
Fig. 5 is the structural representation of the venthole of embodiment 2.
Fig. 6 is the structural representation of the anti-blowpipe of embodiment 3.
Fig. 7 is the use state figure of the back-blowing dust removing device of embodiment 4.
Embodiment
Clear, complete explanation is carried out to the present invention below in conjunction with the accompanying drawings.Those of ordinary skill in the art are based on these
It is possible to realize the present invention in the case of explanation.Before with reference to accompanying drawing, the present invention will be described, it is necessary to it is emphasized that：
(1) in the technical scheme and technical characteristic provided in each several part including the description below in the present invention,
In the case of not conflicting, these technical schemes and technical characteristic can be mutually combined.
(2) embodiments of the invention being related in the description below are generally only the embodiment of a part of the invention, without
It is whole embodiments.Therefore, based on the embodiment in the present invention, those of ordinary skill in the art are not making creative labor
The every other embodiment obtained on the premise of dynamic, should all belong to the scope of protection of the invention.
(3) on the explanation to term in the present invention.In description and claims of this specification and relevant part
Term " first ", " second " etc. be easily to cause the object confused for distinguishing, without for describe specific order or
Precedence.In addition, term " comprising " and " having " and their any deformation, it is intended that covering is non-exclusive to be included.
It should be noted that the filter membrane can use but be not limited to using CN104874798A, CN104959611A,
Porous membrane disclosed in CN104874801A, CN104959612A.
Embodiment 1
Reverse gas cleaning system as shown in Figure 1, the deashing that the reverse gas cleaning system is used for tubular filter device assembly is handled, institute
Tubular filter device assembly is stated including orifice plate 2 and six tubular filters 1, the circle that the tubular filter 1 is protruded by upper end
Ring 13 is fastenedly connected with the orifice plate 2；The reverse gas cleaning system includes being located at air supply manifold 4 and the institute of the top of orifice plate 2
State air supply manifold 4 connection six injection tubes 41 and with described six tubular filters, 1 one-to-one six reverse gas cleaning
Device.
As in Figure 2-4, each back-blowing dust removing device is used for the reverse gas cleaning of corresponding tubular filter 1, the tubular type
Filter 1 includes outside filter membrane 11, internal be used to support the support frame 12 of the filter membrane 11 and be formed at institute
State the outlet passageway in support frame 12；The back-blowing dust removing device include be located at the outlet passageway in the tubular type mistake
The anti-blowpipe 3 of the length matching of filter 1, the anti-blowpipe 3 includes body 31, the air inlet on body 31 and made described
Air inlet and the air outlet structure of outlet passageway conducting.
The external diameter of the body 31 is equal to 0.5 times of the internal diameter of the tubular filter 1.
The air inlet carries out pre-connection positioning using rubber plug 8 first with corresponding injection tube 41, then using card
Hoop 7 is fastenedly connected.
The air outlet structure include along the body 31 length direction arrange multiple outlet cells 32, it is two neighboring go out
The spacing of gas unit 32 is 0.2m.Each outlet cell 32 includes annular and equally distributed six ventholes 320.
Also include making the body 31 with the tubular filter 1 with the positioner of central shaft, the positioner bag
One end is included with being connected locating rod 5 at the bottom centre of support frame 12, the locating rod 5 has hollow structure and the positioning
The external diameter of the internal diameter of bar 5 and the body 31 matches, so as to realize the other end for making the locating rod 5 and the bottom of body 31
Insert embedding connection in portion.
Also include the fixing device 6 for preventing that the body 31 from rocking, the fixing device 6 includes outer with the body 31
The inside retainer ring 61 of footpath matching and the connecting rod 62 being connected across between the support frame 12 and the internal retainer ring 61；
The upper end and middle part of the body 31 are respectively provided with the fixing device 6.
In addition, also having carried out four groups of check experiments, respectively reference examples 1-4.The difference of reference examples 1 and embodiment 1 is：
The external diameter of the body 31 is equal to 0.6 times of the internal diameter of the tubular filter 1.The difference of reference examples 2 and embodiment 1 is：
The external diameter of the body 31 is equal to 0.8 times of the internal diameter of the tubular filter 1.The difference of reference examples 3 and embodiment 1 is：
The external diameter of the body 31 is equal to 0.4 times of the internal diameter of the tubular filter 1.The difference of reference examples 4 and embodiment 1 is：
The external diameter of the body 31 is equal to 0.9 times of the internal diameter of the tubular filter 1.
Empirical tests, under identical blowback gross pressure, the reverse gas cleaning system of embodiment 1, reference examples 1 and reference examples 2 is equal
With more preferable ash-removal effect, and the filter efficiency of filter membrane is not influenceed.Wherein, the ash-removal effect of reference examples 1 is in filter efficiency
Matching it is best.And the ash-removal effect of reference examples 3 is far below the ash-removal effect of embodiment 1, reference examples 1 and reference examples 2, and it is right
4 filter efficiency is far below the filter efficiency of embodiment 1, reference examples 1 and reference examples 2 as usual, illustrates, only when the body 31
External diameter when being equal to 0.5-0.8 times of internal diameter of the tubular filter 1, can just have good filter efficiency and deashing effect concurrently
Really.
In addition, also having carried out four groups of check experiments, respectively reference examples 5-8.The difference of reference examples 5 and embodiment 1 is：
The spacing of two neighboring outlet cell 32 is 0.5m.The difference of reference examples 6 and embodiment 1 is：Two neighboring outlet cell 32
Spacing be 0.8m.The difference of reference examples 7 and embodiment 1 is：The spacing of two neighboring outlet cell 32 is 0.1m.Reference examples
8 are with the difference of embodiment 1：The spacing of two neighboring outlet cell 32 is 0.9m.
Empirical tests, under identical deashing thickness, the reverse gas cleaning system of embodiment 1, reference examples 5 and reference examples 6 has
There is more comprehensive ash-removal effect and required blowback gross pressure is smaller.Wherein, the blowback pressure of reference examples 5 and of ash-removal effect
With degree highest.And the blowback pressure of reference examples 7 is far below the blowback pressure of embodiment 1, reference examples 5 and reference examples 6, and reference examples
8 ash-removal effect is far below the ash-removal effect of embodiment 1, reference examples 5 and reference examples 6, illustrates, only when two neighboring outlet list
When the spacing of member 32 is 0.2-0.8m, good deashing thickness and ash-removal effect can be just had concurrently.
Embodiment 2
As shown in figure 5, on the basis of embodiment 1, the inner size of the venthole 320 of the present embodiment is less than outer end chi
It is very little.Under identical deashing thickness, the blowback pressure needed for the present embodiment is smaller and deashing more fully, especially to offices such as turnings
Portion position also can effective deashing.
Embodiment 3
As shown in fig. 6, on the basis of embodiment 1, between the venthole 320 of the two neighboring outlet cell 32 of the present embodiment
Every arrangement.Under identical blowback pressure, the deashing of the present embodiment is more comprehensively.
Embodiment 4
As shown in fig. 7, compared with Example 1, the difference that the back-blowing dust removing device of the present embodiment has is：The tubular type mistake
Filter 1 includes the first fillter section 101, the second fillter section 102 and the 3rd fillter section 103 being from top to bottom threadedly coupled successively, institute
State the first body 301, the second body 302 and the 3rd body 303 that body 31 includes from top to bottom being sequentially connected, second pipe
The top of the body 303 of body 302 and the 3rd is provided with the pipe sleeve 33 that internal diameter is matched with the external diameter of the body 31, so that the first pipe
Body 301, the second body 302 and the 3rd body 303 insert embedding connection successively, are easy to dismounting；In the first body 301, the second body 302
Fixing device 6 is equipped with the 3rd body 303.
Claims (10)
1. back-blowing dust removing device, the back-blowing dust removing device is used for the reverse gas cleaning of tubular filter (1), the tubular filter
(1) include outside filter membrane (11), internal be used to support the support frame (12) of the filter membrane (11) and be formed at
Outlet passageway in the support frame (12), it is characterised in that：The back-blowing dust removing device includes being located at the outlet passageway
The interior anti-blowpipe (3) matched with the length of the tubular filter (1), the anti-blowpipe (3) includes body (31), positioned at pipe
Air inlet on body (31) and the air outlet structure for turning on the air inlet and outlet passageway；The air outlet structure includes outlet
Hole (320).
2. back-blowing dust removing device as claimed in claim 1, it is characterised in that：The air outlet structure is included along the body (31)
Length direction arrangement multiple outlet cells (32), each outlet cell (32) includes multiple ventholes of annular spread
(320)。
3. back-blowing dust removing device as claimed in claim 2, it is characterised in that：The spacing of two neighboring outlet cell (32) is
0.2-0.8m；The inner size of the venthole (320) is less than outer end size.
4. back-blowing dust removing device as claimed in claim 1, it is characterised in that：Also include making the body (31) and the tubular type
Positioner of the filter (1) with central shaft；Also include the fixing device (6) for preventing that the body (31) from rocking.
5. back-blowing dust removing device as claimed in claim 4, it is characterised in that：The positioner includes locating rod (5), described
One end of locating rod (5) is connected with the body (31) bottom, and the other end at the support frame (12) bottom centre with being connected.
6. back-blowing dust removing device as claimed in claim 5, it is characterised in that：The locating rod (5) and the body (31) bottom
Insert embedding connection in portion.
7. back-blowing dust removing device as claimed in claim 4, it is characterised in that：The fixing device (6) includes and the body
(31) inside retainer ring (61) and be connected across the support frame (12) and the internal retainer ring (61) that external diameter is matched
Between connecting rod (62)；The fixing device (6) at least is set in the upper end of the body (31).
8. back-blowing dust removing device as claimed in claim 1, it is characterised in that：The external diameter of the body (31) is equal to the tubular type
0.5-0.8 times of the internal diameter of filter (1)；The body (31) includes from top to bottom inserting the first body of embedding connection successively
(301), the second body (302) and the 3rd body (303).
9. reverse gas cleaning system, the deashing that the reverse gas cleaning system is used for tubular filter device assembly is handled, the tubular filter
Device assembly includes orifice plate (2) and at least one tubular filter (1) being connected with the orifice plate (2), the reverse gas cleaning system
System includes the air supply manifold (4) being located above the orifice plate (2) and the injection tube (41) being connected with the air supply manifold (4),
The quantity and the quantity of the tubular filter (1) of the injection tube (41) match, it is characterised in that：Also include and the pipe
Back-blowing dust removing device described in one of claim 1-8 that the quantity of formula filter (1) matches, the back-blowing dust removing device
Air inlet is turned on corresponding injection tube (41).
10. it is used for the reverse gas cleaning system of tubular filter device assembly as claimed in claim 9, it is characterised in that：The body
(31) it is connected with the injection tube (41) using clip (7) or flange is docked.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710293333.1A CN107042036A (en) | 2017-04-28 | 2017-04-28 | Back-blowing dust removing device and reverse gas cleaning system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710293333.1A CN107042036A (en) | 2017-04-28 | 2017-04-28 | Back-blowing dust removing device and reverse gas cleaning system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107042036A true CN107042036A (en) | 2017-08-15 |
Family
ID=59546912
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710293333.1A Withdrawn CN107042036A (en) | 2017-04-28 | 2017-04-28 | Back-blowing dust removing device and reverse gas cleaning system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107042036A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111603858A (en) * | 2020-06-04 | 2020-09-01 | 常州市第一人民医院 | Self-cleaning gas filtering device |
-
2017
- 2017-04-28 CN CN201710293333.1A patent/CN107042036A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111603858A (en) * | 2020-06-04 | 2020-09-01 | 常州市第一人民医院 | Self-cleaning gas filtering device |
| CN111603858B (en) * | 2020-06-04 | 2021-02-09 | 常州市第一人民医院 | Self-cleaning gas filtering device |
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Application publication date: 20170815 |