CN106679442A - Smelting furnace flue gas treatment device with raw material preheating function - Google Patents
Smelting furnace flue gas treatment device with raw material preheating function Download PDFInfo
- Publication number
- CN106679442A CN106679442A CN201710140641.0A CN201710140641A CN106679442A CN 106679442 A CN106679442 A CN 106679442A CN 201710140641 A CN201710140641 A CN 201710140641A CN 106679442 A CN106679442 A CN 106679442A
- Authority
- CN
- China
- Prior art keywords
- pipe
- smelting furnace
- flue gas
- purifying box
- water tank
- 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.)
- Withdrawn
Links
- 238000003723 Smelting Methods 0.000 title claims abstract description 45
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 34
- 239000003546 flue gas Substances 0.000 title claims abstract description 34
- 239000002994 raw material Substances 0.000 title claims abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 54
- 239000000779 smoke Substances 0.000 claims abstract description 20
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 16
- 230000008878 coupling Effects 0.000 claims description 4
- 238000010168 coupling process Methods 0.000 claims description 4
- 238000005859 coupling reaction Methods 0.000 claims description 4
- 239000011148 porous material Substances 0.000 claims description 3
- 238000000746 purification Methods 0.000 abstract description 10
- 239000002918 waste heat Substances 0.000 abstract description 7
- 238000000034 method Methods 0.000 description 8
- 239000002184 metal Substances 0.000 description 4
- 238000005272 metallurgy Methods 0.000 description 4
- 239000007789 gas Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 235000019504 cigarettes Nutrition 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 239000003500 flue dust Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 241001062472 Stokellia anisodon Species 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- F27D17/004—
-
- F27D17/008—
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Landscapes
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a smelting furnace flue gas treatment device with a raw material preheating function. The smelting furnace flue gas treatment device with the raw material preheating function comprises a smelting furnace, a water tank and a purification tank; the purification tank and the water tank are both located on the right side of the smelting furnace; the purification tank is located over the water tank; a first feeding hopper is fixedly communicated with the top of the smelting furnace; a smoke exhausting pipe is fixedly communicated with the right side face of the smelting furnace; a smoke inlet pipe is fixedly connected with the lower surface of the purification tank; a smoke outlet pipe is fixedly connected with the upper surface of the purification tank; and a water inlet pipe and a water outlet pipe are fixedly communicated with the top and the bottom of the water tank correspondingly. According to the smelting furnace flue gas treatment device with the raw material preheating function, the smoke exhausting pipe is fixedly communicated with the water tank, the space between two screen rings is filled with activated carbon, and the flue gas can be filtered and purified fully; and by arranging a feeding pipe in the purification tank, the two ends of the feeding pipe penetrate the left side wall and the right side wall of the purification tank correspondingly, and the problem that an existing flue gas treatment device cannot well utilize waste heat is solved.
Description
Technical field
The present invention relates to chemical industry technical field of smelting, specially a kind of smelting furnace fume treatment with raw material preheating function
Device.
Background technology
Smelting is a kind of refinement technique, refer to roasting, melting, electrolysis and using methods such as chemical agents in Ore
METAL EXTRACTION out；Reduce in metal contained impurity or increase certain composition in metal, be smelt required metal.
Smelting furnace can produce substantial amounts of flue gas when smelting processing is carried out, and flue gas is with penetrating odor and containing a large amount of
Flue dust, so needing the outlet flue in smelting furnace to install the device of purifying smoke additional, the flue-gas temperature discharged from smelting furnace is very high,
With substantial amounts of heat, and existing flue gas processing device can not well utilize these waste heats mostly.
The content of the invention
（One）The technical problem of solution
For the deficiencies in the prior art, the invention provides a kind of smelting furnace flue gas processing device with raw material preheating function,
Solve the problems, such as that existing flue gas processing device waste heat cannot be utilized well.
（Two）Technical scheme
To realize object above, the present invention is achieved by the following technical programs：A kind of smelting with raw material preheating function
Kiln gas processing meanss, including smelting furnace, water tank and purifying box, the purifying box and water tank are respectively positioned on the right side of smelting furnace, institute
Purifying box is stated positioned at the surface of water tank, the top of the smelting furnace is fixed and is communicated with the first feed hopper, the right side of the smelting furnace
Side is fixed and is communicated with smoke exhaust pipe, and the lower surface of the purifying box is fixedly connected with smoke-intake pipe, and the upper surface of the purifying box is consolidated
Fixed connection pipe, respectively fixation is communicated with water inlet pipe and outlet pipe for the top and bottom of the water tank, the smoke exhaust pipe
Left side wall of the connection in water tank is fixed in outlet side, and the inlet end of the smoke-intake pipe fixes roof of the connection in water tank.
The purifying box is internally provided with feed pipe, and the two ends of the feed pipe extend through the left and right sidewall of purifying box
And the outside of purifying box is extended to, the right-end openings of the feed pipe are fixedly connected with shrouding, and the upper surface of the feed pipe is also
The second feed hopper is fixedly connected with, second feed hopper is located between purifying box and shrouding, and the right flank of the shrouding passes through
Connecting rod is fixedly connected with motor, and installing hole is offered on the shrouding, and the inside of the installing hole is installed with clutch shaft bearing,
The inside fixed cover of the clutch shaft bearing is connected to rotating shaft, and the right-hand member of the rotating shaft runs through clutch shaft bearing and extends to the right side of shrouding
Side, and the right-hand member of rotating shaft is also fixedly connected by shaft coupling with the outfan of motor, the left end of the rotating shaft runs through clutch shaft bearing
And the inside of feed pipe is extended to, the outer surface of the rotating shaft is additionally provided with pusher blade, and the inner surface of the feed pipe also leads to
Cross two connecting rods and be fixedly connected with retainer ring, the inside of the retainer ring is installed with second bearing, a left side for the rotating shaft
End is fixedly sleeved in second bearing, and the outer surface also fixed cover of the feed pipe is connected to two sieve rings, two sieve rings
Lateral surface is fixedly connected with the inner surface of purifying box, and between two sieve rings activated carbon is filled with.
Preferably, the water inlet end of the water inlet pipe and the water side of outlet pipe are provided with capping, the following table of the water tank
Face is located at same level height with the lower surface of smoke exhaust pipe.
Preferably, the retainer ring is located at the left end of charging pipe internal surface, and the left end of the feed pipe is positioned at the first charging
The surface of bucket.
Preferably, first feed hopper and the second feed hopper are in funnel-form, and the pusher blade is in the shape of a spiral, described
The left side of feed pipe is 40 to 60 degree with the scope of horizontal plane angulation.
Preferably, the pore diameter range of sieve aperture is five to ten millimeters on the sieve ring, and two sieve rings are respectively positioned on smoke-intake pipe
And pipe between.
Preferably, the smoke-intake pipe is located at the left side of pipe, and the feed pipe is parallel to each other with the lower surface of purifying box.
（Three）Beneficial effect
The invention provides a kind of smelting furnace flue gas processing device with raw material preheating function, possesses following beneficial effect：
There should be the smelting furnace flue gas processing device of raw material preheating function, and be fixed with water tank by smoke exhaust pipe and connected, in two sieves
Activated carbon is filled between ring, sufficiently filtration, purification can be carried out to flue gas, by being internally provided with charging in purifying box
Pipe, the two ends of feed pipe extend through the left and right sides wall of purifying box, can be to entering when purifier is purified to flue gas
Raw material in expects pipe carries out waste heat, is conducive to improving efficiency, sufficiently using the heat in flue gas, solves existing cigarette
Flash Gas Compression Skid System cannot problem that well waste heat is utilized.
Description of the drawings
Fig. 1 is front view of the present invention；
Fig. 2 is front elevational view of the present invention；
Fig. 3 is the enlarged drawing in Fig. 2 of the present invention at A；
Fig. 4 is the enlarged drawing in Fig. 2 of the present invention at B.
In figure：1 smelting furnace, 2 water tanks, 3 purifying boxs, 4 first feed hoppers, 5 smoke exhaust pipes, 6 smoke-intake pipes, 7 pipes, 8 water inlets
Pipe, 9 outlet pipes, 10 feed pipes, 11 shroudings, 12 second feed hoppers, 13 connecting rods, 14 motors, 15 installing holes, 16 clutch shaft bearings, 17
Rotating shaft, 18 shaft couplings, 19 pusher blades, 20 connecting rods, 21 retainer rings, 22 second bearings, 23 sieve rings, 24 activated carbons, 25 cappings.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than the embodiment of whole.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
Fig. 1-4 are referred to, the present invention provides a kind of technical scheme：At a kind of smelting kiln gas with raw material preheating function
Reason device, including smelting furnace 1, water tank 2 and purifying box 3, purifying box 3 and water tank 2 are respectively positioned on the right side of smelting furnace 1, purifying box 3
In the surface of water tank 2, the top of smelting furnace 1 is fixed and is communicated with the first feed hopper 4, and the right flank of smelting furnace 1 is fixed and is communicated with
Smoke exhaust pipe 5, the lower surface of purifying box 3 is fixedly connected with smoke-intake pipe 6, and the upper surface of purifying box 3 is fixedly connected with pipe 7, water
Respectively fixation is communicated with water inlet pipe 8 and outlet pipe 9 at the top and bottom of case 2, and filter water is injected into water tank 2 by water inlet pipe 8,
The flue dust in flue gas can be filtered, the water inlet end of water inlet pipe 8 and the water side of outlet pipe 9 are provided with capping 25, under water tank 2
Surface is located at same level height with the lower surface of smoke exhaust pipe 5, and the water in water tank 2 will not pass back into smelting furnace 1 by smoke exhaust pipe 5
Interior, left side wall of the connection in water tank 2 is fixed in the outlet side of smoke exhaust pipe 5, and the inlet end of smoke-intake pipe 6 fixes connection on the top of water tank 2
Wall.
Purifying box 3 is internally provided with feed pipe 10, and the two ends of feed pipe 10 extend through the left and right sidewall of purifying box 3 simultaneously
The outside of purifying box 3 is extended to, the left end of feed pipe 10 is located at the surface of the first feed hopper 4, the right-end openings of feed pipe 10
Shrouding 11 is fixedly connected with, smoke-intake pipe 6 is located at the left side of pipe 7, and feed pipe 10 is parallel to each other with the lower surface of purifying box 3,
The left side of feed pipe 10 is 40 to 60 degree with the scope of horizontal plane angulation, facilitates raw materials for metallurgy into the first charging
In bucket 4, the upper surface of feed pipe 10 is also fixedly connected with the second feed hopper 12, and the first feed hopper 4 and the second feed hopper 12 are in
Funnel-form, the second feed hopper 12 is located between purifying box 3 and shrouding 11, and the right flank of shrouding 11 is fixedly connected with by connecting rod 13
Motor 14, offers installing hole 15 on shrouding 11, the inside of installing hole 15 is installed with clutch shaft bearing 16, clutch shaft bearing 16
Internal fixed cover is connected to rotating shaft 17, and the right-hand member of rotating shaft 17 runs through clutch shaft bearing 16 and extends to the right side of shrouding 11, and rotating shaft 17
Right-hand member be also fixedly connected with the outfan of motor 14 by shaft coupling 18, the left end of rotating shaft 17 is through clutch shaft bearing 16 and extends
To the inside of feed pipe 10, the outer surface of rotating shaft 17 is additionally provided with pusher blade 19, pusher blade 19 in the shape of a spiral, raw materials for metallurgy
Entered in feed pipe 10 by the second feed hopper 12, being forced through purifying box 3 by pusher blade 19 has the left end of feed pipe 10
Discharge, fall in the first feed hopper 4, into smelting furnace 1, the inner surface of feed pipe 10 is also fixedly connected by two connecting rods 20
There is retainer ring 21, retainer ring 21 is located at the left end of the inner surface of feed pipe 10, and the inside of retainer ring 21 is installed with second bearing
22, the left end of rotating shaft 17 is fixedly sleeved in second bearing 22, can countershaft 17 be supported, the rotation of rotating shaft 17 is more steady
Fixed, the outer surface also fixed cover of feed pipe 10 is connected to two sieve rings 23, the lateral surface of two sieve rings 23 with the interior table of purifying box 3
Face is fixedly connected, and between two sieve rings 23 activated carbon 24 is filled with, and can absorb the penetrating odor in flue gas, sieves on sieve ring 23
The pore diameter range in hole is five to ten millimeters, can support activated carbon 24, does not affect flue gas to pass through, and two sieve rings 23 are respectively positioned on into cigarette
Between pipe 6 and pipe 7.
When using, by water inlet pipe 8 to water filling in water tank 2, the flue gas in smelting furnace 1 is entered user by smoke exhaust pipe 5
Filtered by water in water tank 2, entered in purifying box 3 by smoke-intake pipe 6, by the mistake of activated carbon 24 between two sieve rings 23
Discharged by pipe 6 after filter, during user be powered and start for motor 14, motor 14 drive rotating shaft 17 rotate,
Raw materials for metallurgy is injected into feed pipe 10 by the second feed hopper 12, raw materials for metallurgy is pushed by the pusher blade 19 in rotating shaft 17
Enter the left end of feed pipe 19, preheated by the waste heat of flue gas when in purifying box 3, fallen into by the left end of feed pipe 10
Smelting furnace 1 is entered in first discharge bucket 12.
In sum, there should be the smelting furnace flue gas processing device of raw material preheating function, be consolidated by smoke exhaust pipe 5 and water tank 2
Fixed connection, sieves at two and activated carbon 24 is filled between ring 23, sufficiently filtration, purification can be carried out to flue gas, by purification
Case 3 is internally provided with feed pipe 10, and the two ends of feed pipe 10 extend through the left and right sides wall of purifying box 3, in purifier
Waste heat can be carried out to the raw material in feed pipe 10, be conducive to improving efficiency, sufficiently utilize when purifying to flue gas
Heat in flue gas, solves the problems, such as that existing flue gas processing device waste heat cannot be utilized well.
It should be noted that herein, such as first and second or the like relational terms are used merely to a reality
Body or operation make a distinction with another entity or operation, and not necessarily require or imply these entities or deposit between operating
In any this actual relation or order.And, term " including ", "comprising" or its any other variant are intended to
Nonexcludability is included, so that a series of process, method, article or equipment including key elements not only will including those
Element, but also including other key elements being not expressly set out, or also include for this process, method, article or equipment
Intrinsic key element.In the absence of more restrictions.By sentence " key element limited including ..., it is not excluded that
Also there is other identical element in the process including the key element, method, article or equipment ", the electricity occurred in this article
Device element electrically connect with extraneous main controller and 220V civil powers, and main controller can be computer etc. play control routinely
Know equipment.
Although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
Understanding can carry out various changes, modification, replacement to these embodiments without departing from the principles and spirit of the present invention
And modification, the scope of the present invention be defined by the appended.
Claims (6)
1. a kind of smelting furnace flue gas processing device with raw material preheating function, including smelting furnace（1）, water tank（2）And purifying box
（3）, the purifying box（3）And water tank（2）It is respectively positioned on smelting furnace（1）Right side, the purifying box（3）Positioned at water tank（2）Just
Top, the smelting furnace（1）Top fix be communicated with the first feed hopper（4）, the smelting furnace（1）Right flank fix connection
There is smoke exhaust pipe（5）, the purifying box（3）Lower surface be fixedly connected with smoke-intake pipe（6）, the purifying box（3）Upper surface consolidate
Fixed connection pipe（7）, the water tank（2）Top and bottom respectively fixation be communicated with water inlet pipe（8）And outlet pipe（9）,
It is characterized in that：The smoke exhaust pipe（5）Outlet side fix connection in water tank（2）Left side wall, the smoke-intake pipe（6）Air inlet
The fixed connection in end is in water tank（2）Roof；
The purifying box（3）Be internally provided with feed pipe（10）, the feed pipe（10）Two ends extend through purifying box（3）
Left and right sidewall and extend to purifying box（3）Outside, the feed pipe（10）Right-end openings be fixedly connected with shrouding（11）,
The feed pipe（10）Upper surface be also fixedly connected with the second feed hopper（12）, second feed hopper（12）Positioned at purifying box
（3）And shrouding（11）Between, the shrouding（11）Right flank pass through connecting rod（13）It is fixedly connected with motor（14）, the shrouding
（11）On offer installing hole（15）, the installing hole（15）Inside be installed with clutch shaft bearing（16）, the first axle
Hold（16）Inside fixed cover be connected to rotating shaft（17）, the rotating shaft（17）Right-hand member run through clutch shaft bearing（16）And extend to shrouding
（11）Right side, and rotating shaft（17）Right-hand member also pass through shaft coupling（18）With motor（14）Outfan be fixedly connected, described turn
Axle（17）Left end run through clutch shaft bearing（16）And extend to feed pipe（10）Inside, the rotating shaft（17）Outer surface also set
It is equipped with pusher blade（19）, the feed pipe（10）Inner surface also pass through two connecting rods（20）It is fixedly connected with retainer ring
（21）, the retainer ring（21）Inside be installed with second bearing（22）, the rotating shaft（17）Left end it is fixedly sleeved
Second bearing（22）It is interior, the feed pipe（10）Outer surface also fixed cover be connected to two sieve rings（23）, two sieve rings
（23）Lateral surface and purifying box（3）Inner surface be fixedly connected, two sieve rings（23）Between be filled with activated carbon
（24）.
2. a kind of smelting furnace flue gas processing device with raw material preheating function according to claim 1, it is characterised in that：
The water inlet pipe（8）Water inlet end and outlet pipe（9）Water side be provided with capping（25）, the water tank（2）Lower surface
With smoke exhaust pipe（5）Lower surface be located at same level height.
3. a kind of smelting furnace flue gas processing device with raw material preheating function according to claim 1, it is characterised in that：
The retainer ring（21）Positioned at feed pipe（10）The left end of inner surface, the feed pipe（10）Left end be located at the first feed hopper
（4）Surface.
4. a kind of smelting furnace flue gas processing device with raw material preheating function according to claim 1, it is characterised in that：
First feed hopper（4）With the second feed hopper（12）In funnel-form, the pusher blade（19）In the shape of a spiral, the charging
Pipe（10）The scope of left side and horizontal plane angulation be 40 to 60 degree.
5. a kind of smelting furnace flue gas processing device with raw material preheating function according to claim 1, it is characterised in that：
The sieve ring（23）The pore diameter range of upper sieve aperture is five to ten millimeters, two sieve rings（23）It is respectively positioned on smoke-intake pipe（6）With go out
Smoke pipe（7）Between.
6. a kind of smelting furnace flue gas processing device with raw material preheating function according to claim 1, it is characterised in that：
The smoke-intake pipe（6）Positioned at pipe（7）Left side, the feed pipe（10）With purifying box（3）Lower surface be parallel to each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710140641.0A CN106679442A (en) | 2017-03-10 | 2017-03-10 | Smelting furnace flue gas treatment device with raw material preheating function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710140641.0A CN106679442A (en) | 2017-03-10 | 2017-03-10 | Smelting furnace flue gas treatment device with raw material preheating function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106679442A true CN106679442A (en) | 2017-05-17 |
Family
ID=58828734
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710140641.0A Withdrawn CN106679442A (en) | 2017-03-10 | 2017-03-10 | Smelting furnace flue gas treatment device with raw material preheating function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106679442A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107202498A (en) * | 2017-05-25 | 2017-09-26 | 清远初曲智能科技有限公司 | A kind of heat storage type secondary metal ultra-clean fine particle filters fume extractor |
| CN110846457A (en) * | 2019-11-06 | 2020-02-28 | 上海金范机械铸造有限公司 | Gray cast iron production process and smelting furnace applied to process |
| CN112027704A (en) * | 2020-10-08 | 2020-12-04 | 上海沃骋有色金属有限公司 | Continuous feeding equipment for secondary aluminum smelting furnace |
-
2017
- 2017-03-10 CN CN201710140641.0A patent/CN106679442A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107202498A (en) * | 2017-05-25 | 2017-09-26 | 清远初曲智能科技有限公司 | A kind of heat storage type secondary metal ultra-clean fine particle filters fume extractor |
| CN110846457A (en) * | 2019-11-06 | 2020-02-28 | 上海金范机械铸造有限公司 | Gray cast iron production process and smelting furnace applied to process |
| CN112027704A (en) * | 2020-10-08 | 2020-12-04 | 上海沃骋有色金属有限公司 | Continuous feeding equipment for secondary aluminum smelting furnace |
| CN112027704B (en) * | 2020-10-08 | 2023-03-14 | 上海沃骋有色金属有限公司 | Continuous feeding equipment for secondary aluminum smelting furnace |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20170517 |
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| WW01 | Invention patent application withdrawn after publication |