CN105561644B - A kind of high mass dryness fraction dehydration device and its dewatering for filter press - Google Patents
A kind of high mass dryness fraction dehydration device and its dewatering for filter press Download PDFInfo
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- CN105561644B CN105561644B CN201610134715.5A CN201610134715A CN105561644B CN 105561644 B CN105561644 B CN 105561644B CN 201610134715 A CN201610134715 A CN 201610134715A CN 105561644 B CN105561644 B CN 105561644B
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- filter
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- filter plate
- frame matrix
- solid
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D25/00—Filters formed by clamping together several filtering elements or parts of such elements
- B01D25/12—Filter presses, i.e. of the plate or plate and frame type
- B01D25/164—Chamber-plate presses, i.e. the sides of the filtering elements being clamped between two successive filtering plates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D25/00—Filters formed by clamping together several filtering elements or parts of such elements
- B01D25/28—Leaching or washing filter cakes in the filter handling the filter cake for purposes other than regenerating
- B01D25/282—Leaching or washing filter cakes in the filter handling the filter cake for purposes other than regenerating for drying
- B01D25/285—Leaching or washing filter cakes in the filter handling the filter cake for purposes other than regenerating for drying by compression using inflatable membranes
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filtration Of Liquid (AREA)
Abstract
The invention discloses a kind of high mass dryness fraction dehydration device and its dewatering for filter press, including filter frame matrix, two faces of filter frame matrix, respectively symmetrically offer two structure identical cavitys, and each cavity is sequentially provided with hydraulic pressure film, filter plate, chuck and filter cloth from inside to outside；The bottom of cavity is provided with hydraulic pressure groove, and each hydraulic pressure groove is interconnected by being opened in the hydraulic oil inlet in the middle part of filter frame matrix；Charging aperture is offered on the frame of filter frame matrix, charging aperture connects cavity by side channel.Filter plate is movably arranged between hydraulic pressure film and chuck, and when applying an outside thrust to filter plate, the filter plate can be moved towards filter cloth direction.The present apparatus is simple in construction, easy to operate, presses oil the solid-liquid mixture between driving filter plate and filter plate by high pressure liquid, substantially increases squeeze pressure, fully can extrude the liquid in solidliquid mixture, greatly improve solid content.
Description
Technical field
The present invention relates to filter-pressing process field, more particularly to a kind of high mass dryness fraction dehydration device and its dehydration for filter press
Method.
Background technology
Filter press is a kind of conventional solid-liquid separating equipment, is widely used in chemical industry, pharmacy, metallurgy, dyestuff, food, wine
Make, ceramics and the industry such as environmental protection.The general principle of separation of solid and liquid is：Mixed liquor flows through filter medium (filter cloth), solid retention
On filter cloth, and gradually accumulation forms filter cake on filter cloth, and filtrate portion then penetrates filter cloth, as without solid
Clear liquid.
The filter plate of existing general filter press is applied in combination using one piece of membrane filter plate and one piece of chamber filter plate, and wherein van-type is filtered
Plate is solid construction, and membrane filter plate constitutes internal chamber structure by diaphragm and core plate.Membrane filter plate is by two diaphragms and core plate group
Into being passed through external agency (water or compressed air etc.) and enter in the chamber between core plate and diaphragm, make diaphragm bulging so as to right
The filter chamber that membrane filter plate is constituted with chamber filter plate is compressed, so as to the barrier film bulging and reduce filter cake space, filter cake is compressed,
Thus further reduce the residual moisture in filter cake space and then preferably separate, improve solid content.Wherein diaphragm is main
Dynamic component, repeatedly motion easily makes diaphragm deform upon and then damage.Filter press in use, is generally deposited with membrane filter plate
It is general to use 2-3 in barrier film because heaving the problem on deformation with flat lower generation repeatedly, eardrum number of times for after 5000-6000 times, every
The damage of film just caused by above-mentioned deformation can not be used, it is necessary to which changing barrier film can just be continuing with.Further, since pumping material
Limited pressure, the pressure for the medium being passed through in diaphragm chamber is also limited, it is impossible to provide high pressure, high pressure will also result in the damage of barrier film
Bad, therefore, pressure during filtering can only be limited to below 1MPa, this be also cause the reason for filter cake can not form higher mass dryness fraction it
One.
The content of the invention
It is an object of the invention to the shortcoming and defect for overcoming above-mentioned prior art, there is provided a kind of high level cadre for filter press
Dehydration device and its dewatering are spent, solid-liquid mixture can not be squeezed the shortcoming of paramount mass dryness fraction by solving prior art.
The present invention is achieved through the following technical solutions：
A kind of high mass dryness fraction dehydration device for filter press, it is characterised in that including filter frame matrix 1, the filter frame matrix 1
Two faces, respectively symmetrically offer two structure identical cavitys 2, each cavity 2 be sequentially provided with from inside to outside hydraulic pressure film 4,
Filter plate 5, chuck 8 and filter cloth 7；
The bottom of the cavity 2 is provided with hydraulic pressure groove 3, and each hydraulic pressure groove 3 is by being opened in the hydraulic pressure at the middle part of filter frame matrix 1
Oily inlet 11 is interconnected, and the hydraulic oil inlet 11 connects external hydraulic by being opened in the passage inside filter frame matrix 1
Oily injection device；
Charging aperture 9 is offered on the frame of filter frame matrix 1, charging aperture 9 connects cavity 2 by side channel 9-1；
On four madial walls corresponding to the cavity 2 between filter cloth 7 and filter plate 5, the rhone connected each other is offered
6, the rhone 6 is connected with the osculum 10 being opened on the frame of filter frame matrix 1；
The surrounding of the hydraulic pressure film 4, chuck 8 and filter cloth 7 is fixedly connected by bolt with filter frame matrix 1；
The filter plate 5 is movably arranged between hydraulic pressure film 4 and chuck 8, when give filter plate 5 apply an outside thrust
When, the filter plate 5 can be moved towards the direction of filter cloth 7.
The chuck 8 is a frame structure, and limiting plate 8-1 is provided with the inner side of frame structure, is set on the periphery of filter plate 5
There are outwardly protruding flange 5-2, limiting plate 8-1 that filter plate 5 is limited in cavity 2 by flange 5-2, so that filter plate 5 is only
Moved between hydraulic pressure film 4 and chuck 8.
The filter plate 5 is collected to recessed relative to this water being simultaneously provided with drainage groove 5-1, drainage groove 5-1 of filter cloth 7
Rhone 6 on 2 four madial walls of chamber, after rhone 6 is collected, is expelled to outer through the osculum 10 on the frame of filter frame matrix 1
Portion.
Sealing gasket is provided between the edge of the filter plate 5 and the edge of hydraulic pressure film 4.
A kind of dewatering of solid-liquid mixture, is first clamped multiple filter frame matrixes 1 successively parallel connection with two clamping plates 33
In it, the cavity 2 of each filter frame matrix 1 is mutually aligned, fitted, and then fixes two clamping plates 33；Then by each charging aperture 9
The outside apparatus for feeding of connection, and each hydraulic oil inlet 11 connection outer liquid force feed injection device；Specific dehydration is as follows；
Fed filtration dehydration：
With feed pump by solid-liquid mixture, each cavity 2 of filter frame matrix 1 is pumped into by each charging aperture 9 and side channel 9-1
Interior, i.e., the cavity between the filter cloth 7 and filter cloth 7 of one of filter frame matrix 1 filter frame matrix 1 adjacent thereto treats that solid-liquid is mixed
Material is filled up after the cavity, continues the pressure for keeping being pumped into, in the presence of feed pressure, the moisture in solid-liquid mixture is saturating
Filter cloth 7 flow to the rhone 6 that the water in drainage groove 5-1, drainage groove 5-1 is collected on four madial walls of cavity 2, by
After rhone 6 is collected, outside is expelled to through the osculum 10 on the frame of filter frame matrix 1；Gradually decrease when the water outlet of osculum 10 or
During into drop, feed pump stops charging；Complete the preliminary hydro-extraction of solid-liquid mixture；
High-pressure compressing dehydration：
The hydraulic oil valve of hydraulic oil injection device is opened, hydraulic oil is injected into each filter frame base by hydraulic oil inlet 11
In the hydraulic pressure groove 3 of the bottom of 1 cavity of body 2, continue enhancing perfusion, when hydraulic oil fills up whole hydraulic pressure groove 3, make hydraulic pressure film
4 gradually expand to the direction of filter plate 5, and then promote the filter plate 5 of each filter frame matrix 1 to be moved towards the direction of filter cloth 7, and then to preliminary de-
The solid-liquid mixture secondary extrusion of water, dehydration；In the presence of the pressure of hydraulic oil, the moisture in solid-liquid mixture is passed through
Water in the drainage groove 5-1 that filter cloth 7 is flow on filter plate 5, drainage groove 5-1 is collected to the row on four madial walls of cavity 2
Tank 6, after rhone 6 is collected, outside is expelled to through the osculum 10 on the frame of filter frame matrix 1；When the water outlet of osculum 10 by
Gradually into drop or it is anhydrous ooze when, hydraulic oil injection device stop pressurization；The secondary high-pressure squeezing for completing solid-liquid mixture is de-
Water.
Solid-liquid mixture water content after the preliminary hydro-extraction is below 30%~40%.
Solid-liquid mixture water content after the secondary high-pressure press dewatering is below 10%~15%.
The feed pump uses slush pump.
The present invention has the following advantages and effect relative to prior art：
The present invention includes filter frame matrix 1, and two faces of the filter frame matrix 1 respectively symmetrically offer two structures identical
Cavity 2, each cavity 2 is sequentially provided with hydraulic pressure film 4, filter plate 5, chuck 8 and filter cloth 7 from inside to outside；The bottom of cavity 2 is provided with liquid
Groove 3 is pressed, each hydraulic pressure groove 3 is interconnected by being opened in the hydraulic oil inlet 11 at the middle part of filter frame matrix 1, hydraulic oil note
Entrance 11 connects outer liquid force feed injection device by being opened in the passage inside filter frame matrix 1.In use, first using two clamping plates
33 are clamped in multiple filter frame matrixes 1 successively parallel connection in it, and the cavity 2 of each filter frame matrix 1 is mutually aligned, fitted, and then will
Two clamping plates 33 are fixed；Then each charging aperture 9 is connected into outside apparatus for feeding, and each hydraulic oil inlet 11 connection outer liquid
Press oil injection device；Complete after preparation, you can convenient to realize fed filtration dehydration and high-pressure compressing dewatering process.
The present invention presses oil the solid-liquid mixture between driving filter plate extruding filter plate by high pressure liquid, substantially increases extruding
Pressure, the liquid in solid-liquid mixture can be extruded fully, greatly improve solid content.
Assembling of the invention, convenient disassembly, dewatering process simple and fast, and prior art is overcome because barrier film is because repeatedly
Heave the problem of damage that the deformation with flat lower generation causes can not be used；And also overcome because the pressure of pumping material has
Limit, the pressure for the medium being passed through in diaphragm chamber is also limited, it is impossible to provide high pressure, high pressure will also result in the technology of the damage of barrier film
Problem.
Brief description of the drawings
Fig. 1 is the planar structure schematic diagram of filter frame matrix 1.
Fig. 2 is along B-B cross section structure diagrams in Fig. 1.
Fig. 3 is Fig. 2 partial enlargement structural representations.
Fig. 4 is the partial enlargement structural representation of filter plate.
Fig. 5 is filter plate and chuck matching relationship structural representation.
Fig. 6 is the assembly relation structural representation of filter frame matrix 1.
Fig. 7 is the matching relationship structural representation in filter-pressing process after multiple filter frame matrixes 1 are clamped by clamping plate.
Embodiment
The present invention is more specifically described in detail with reference to specific embodiment.
Embodiment
As shown in Fig. 1 to 7.A kind of high mass dryness fraction dehydration device for filter press of the invention, including filter frame matrix 1, it is described
Two faces of filter frame matrix 1, respectively symmetrically offer two structure identical cavitys 2, and each cavity 2 is sequentially provided with liquid from inside to outside
Ironed film 4, filter plate 5, chuck 8 and filter cloth 7；
The bottom of the cavity 2 is provided with hydraulic pressure groove 3, and each hydraulic pressure groove 3 is by being opened in the hydraulic pressure at the middle part of filter frame matrix 1
Oily inlet 11 is interconnected, and the hydraulic oil inlet 11 connects external hydraulic by being opened in the passage inside filter frame matrix 1
Oily injection device；
Offer charging aperture 9 on the frame of filter frame matrix 1, charging aperture 9 by side channel 9-1 connect cavity 2 (filter cloth it is outer
Side position)；
On four madial walls corresponding to the cavity 2 between filter cloth 7 and filter plate 5, the rhone connected each other is offered
6, the rhone 6 is connected with the osculum 10 being opened on the frame of filter frame matrix 1；
The surrounding of the hydraulic pressure film 4, chuck 8 and filter cloth 7 is fixedly connected by bolt with filter frame matrix 1；
The filter plate 5 is movably arranged between hydraulic pressure film 4 and chuck 8, when give filter plate 5 apply an outside thrust
When, the filter plate 5 can be moved towards the direction of filter cloth 7.
The chuck 8 is a frame structure, and limiting plate 8-1 is provided with the inner side of frame structure, is set on the periphery of filter plate 5
There are outwardly protruding flange 5-2, limiting plate 8-1 that filter plate 5 is limited in cavity 2 by flange 5-2, so that filter plate 5 is only
Moved between hydraulic pressure film 4 and chuck 8.
The filter plate 5 is collected to recessed relative to this water being simultaneously provided with drainage groove 5-1, drainage groove 5-1 of filter cloth 7
Rhone 6 on 2 four madial walls of chamber, after rhone 6 is collected, is expelled to outer through the osculum 10 on the frame of filter frame matrix 1
Portion.
Sealing gasket is provided between the edge of the filter plate 5 and the edge of hydraulic pressure film 4.
A kind of dewatering of solid-liquid mixture, it is real using multiple above-mentioned high mass dryness fraction dehydration devices for filter press
It is existing；First multiple filter frame matrixes 1 successively parallel connection are clamped in it with two clamping plates 33, the cavity 2 of each filter frame matrix 1 is mutually right
Together, fit, then fix two clamping plates 33；Then each charging aperture 9 is connected into outside apparatus for feeding, and the injection of each hydraulic oil
Mouth 11 connects outer liquids force feed injection devices；Specific dehydration is as follows；
Fed filtration dehydration：
With feed pump (slush pump can be used) by solid-liquid mixture, each is pumped into by each charging aperture 9 and side channel 9-1 and filtered
In the cavity 2 of frame matrix 1, i.e., the sky between the filter cloth 7 and filter cloth 7 of one of filter frame matrix 1 filter frame matrix 1 adjacent thereto
Chamber, after solid-liquid mixture fills up the cavity, continues the pressure for keeping being pumped into, in the presence of feed pressure, solid-liquid mixing
The water that moisture in material is flow in drainage groove 5-1, drainage groove 5-1 through filter cloth 7 is collected to four madial walls of cavity 2
On rhone 6, after rhone 6 is collected, outside is expelled to through the osculum 10 on the frame of filter frame matrix 1；When osculum 10
Water outlet is gradually decreased or into when dripping, feed pump stops charging；Complete the preliminary hydro-extraction of solid-liquid mixture；Solid-liquid mixing now
Material moisture is general below 30%~40%.
High-pressure compressing dehydration：
The hydraulic oil valve of hydraulic oil injection device is opened, hydraulic oil is injected into each filter frame base by hydraulic oil inlet 11
In the hydraulic pressure groove 3 of the bottom of 1 cavity of body 2, continue enhancing perfusion, when hydraulic oil fills up whole hydraulic pressure groove 3, make hydraulic pressure film
4 gradually expand to the direction of filter plate 5, and then promote the filter plate 5 of each filter frame matrix 1 to be moved towards the direction of filter cloth 7, and then to preliminary de-
The solid-liquid mixture secondary extrusion of water, dehydration；In the presence of the pressure of hydraulic oil, the moisture in solid-liquid mixture is passed through
Water in the drainage groove 5-1 that filter cloth 7 is flow on filter plate 5, drainage groove 5-1 is collected to the row on four madial walls of cavity 2
Tank 6, after rhone 6 is collected, outside is expelled to through the osculum 10 on the frame of filter frame matrix 1；When the water outlet of osculum 10 by
Gradually into drop or it is anhydrous ooze when, hydraulic oil injection device stop pressurization；The secondary high-pressure squeezing for completing solid-liquid mixture is de-
Water；Solid-liquid mixture water content now is general below 10%~15%.
As described above, the present invention can be better realized.
Embodiments of the present invention are simultaneously not restricted to the described embodiments, other any Spirit Essences without departing from the present invention
With the change made under principle, modification, replacement, combine, simplify, should be equivalent substitute mode, be included in the present invention
Within protection domain.
Claims (3)
1. a kind of high mass dryness fraction dehydration device for filter press, it is characterised in that including filter frame matrix (1), the filter frame matrix
(1) two faces, respectively symmetrically offer two structure identical cavitys (2), and each cavity (2) is sequentially provided with hydraulic pressure from inside to outside
Film (4), filter plate (5), chuck (8) and filter cloth (7)；
The bottom of the cavity (2) is provided with hydraulic pressure groove (3), and each hydraulic pressure groove (3) is by being opened in the middle part of filter frame matrix (1)
Hydraulic oil inlet (11) is interconnected, and the hydraulic oil inlet (11) is connected by being opened in the internal passage of filter frame matrix (1)
Connect outer liquid force feed injection device；
Charging aperture (9) is offered on the frame of filter frame matrix (1), charging aperture (9) connects cavity (2) by side channel (9-1)；
On four madial walls corresponding to the cavity (2) between filter cloth (7) and filter plate (5), the draining connected each other is offered
Groove (6), the rhone (6) is connected with the osculum (10) being opened on filter frame matrix (1) frame；
The surrounding of the hydraulic pressure film (4), chuck (8) and filter cloth (7) is fixedly connected by bolt with filter frame matrix (1)；
The filter plate (5) is movably arranged between hydraulic pressure film (4) and chuck (8), outside is pushed away when applying one to filter plate (5)
During power, the filter plate (5) can be moved towards filter cloth (7) direction；
The chuck (8) is a frame structure, is provided with limiting plate (8-1) in the inner side of frame structure, is set on the periphery of filter plate (5)
Outwardly protruding flange (5-2) is equipped with, filter plate (5) is limited in cavity (2) by limiting plate (8-1) by the flange (5-2), from
And filter plate (5) is only moved between hydraulic pressure film (4) and chuck (8)；
The filter plate (5) is collected relative to this water being simultaneously provided with drainage groove (5-1), drainage groove (5-1) of filter cloth (7)
Rhone (6) to (2) four madial walls of cavity, after rhone (6) collection, through the draining on filter frame matrix (1) frame
Hole (10) is expelled to outside；
Sealing gasket is provided between the edge of the filter plate (5) and the edge of hydraulic pressure film (4).
2. a kind of dewatering of solid-liquid mixture, it is characterised in that be used for filter press as claimed in claim 1 using multiple
High mass dryness fraction dehydration device realize；First multiple filter frame matrixes (1) successively parallel connection are clamped in it with two clamping plates (33), each
The cavity (2) of filter frame matrix (1) is mutually aligned, fitted, then that two clamping plates (33) are fixed；Then by each charging aperture (9) even
Connect outside apparatus for feeding, and each hydraulic oil inlet (11) connection outer liquid force feed injection device；Specific dehydration is as follows；
Fed filtration dehydration：
With feed pump by solid-liquid mixture, each filter frame matrix (1) cavity is pumped into by each charging aperture (9) and side channel (9-1)
(2) in, i.e., the cavity between the filter cloth (7) and filter cloth (7) of one of filter frame matrix (1) filter frame matrix (1) adjacent thereto,
After solid-liquid mixture fills up the cavity, continue the pressure for keeping being pumped into, in the presence of feed pressure, solid-liquid mixture
In the water that is flow to through filter cloth (7) in drainage groove (5-1), drainage groove (5-1) of moisture be collected in four of cavity (2)
Rhone (6) on the wall of side, after rhone (6) collection, is expelled to outer through the osculum (10) on filter frame matrix (1) frame
Portion；When osculum (10) water outlet gradually decrease or into drop when, feed pump stop charging；Complete the preliminary de- of solid-liquid mixture
Water；
High-pressure compressing dehydration：
The hydraulic oil valve of hydraulic oil injection device is opened, hydraulic oil is injected into each filter frame matrix by hydraulic oil inlet (11)
(1) in the hydraulic pressure groove (3) of cavity (2) bottom, continue enhancing perfusion, when hydraulic oil fills up whole hydraulic pressure groove (3), make liquid
Ironed film (4) gradually expands to filter plate (5) direction, and then promotes the filter plate (5) of each filter frame matrix (1) towards filter cloth (7) direction
It is mobile, and then solid-liquid mixture secondary extrusion to preliminary hydro-extraction, dehydration；In the presence of the pressure of hydraulic oil, solid-liquid is mixed
The water that moisture in compound material is passed through in the drainage groove (5-1) that filter cloth (7) is flow on filter plate (5), drainage groove (5-1) collects
Rhone (6) to four madial walls of cavity (2), after rhone (6) collection, through the row on filter frame matrix (1) frame
Water hole (10) is expelled to outside；When osculum (10) water outlet gradually into drop or it is anhydrous ooze when, hydraulic oil injection device stop
Pressurization；Complete the secondary high-pressure press dewatering of solid-liquid mixture；
Solid-liquid mixture water content after the preliminary hydro-extraction is below 30%~40%；
Solid-liquid mixture water content after the secondary high-pressure press dewatering is below 10%~15%.
3. the dewatering of solid-liquid mixture according to claim 2, it is characterised in that the feed pump uses mud
Pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610134715.5A CN105561644B (en) | 2016-03-09 | 2016-03-09 | A kind of high mass dryness fraction dehydration device and its dewatering for filter press |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610134715.5A CN105561644B (en) | 2016-03-09 | 2016-03-09 | A kind of high mass dryness fraction dehydration device and its dewatering for filter press |
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| Publication Number | Publication Date |
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| CN105561644A CN105561644A (en) | 2016-05-11 |
| CN105561644B true CN105561644B (en) | 2017-11-07 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107382009A (en) * | 2017-07-28 | 2017-11-24 | 浙江海河环境科技有限公司 | Super-pressure sludge high-drying degree dewatering |
| DE102017215925A1 (en) * | 2017-09-08 | 2019-03-14 | Krones Aktiengesellschaft | Filtration method and plate filter |
| BR112022014770A2 (en) * | 2020-04-17 | 2022-10-25 | Metso Outotec Finland Oy | A FILTER PLATE STRUCTURE MOUNT AND A HORIZONTAL FILTER PRESS, SUCH AS A TOWER PRESS, HAVING SUCH A PLATE STRUCTURE MOUNT |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2100247U (en) * | 1991-06-25 | 1992-04-01 | 王建国 | Combined double-face inflated squeezing and filtrating-pressing plate frame |
| CN201415967Y (en) * | 2009-05-11 | 2010-03-03 | 华章电气（桐乡）有限公司 | Plate-type sludge dewatering equipment |
| CN202376822U (en) * | 2011-12-02 | 2012-08-15 | 上海复洁环保科技有限公司 | Diaphragm filtering plate |
| CN102814063A (en) * | 2012-08-14 | 2012-12-12 | 佛山市金凯地过滤设备有限公司 | Pressure filter and pressure filtration method thereof |
| CN205613109U (en) * | 2016-03-09 | 2016-10-05 | 华南理工大学 | A high mass dryness fraction dewatering device for pressure filter |
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Effective date of registration: 20221025 Address after: 547000 Luodong Industrial Park, Yizhou District, Hechi City, Guangxi Zhuang Autonomous Region Patentee after: GUANGXI BOGUAN ENVIRONMENTAL PRODUCTS Co.,Ltd. Address before: 510640 No. five, 381 mountain road, Guangzhou, Guangdong, Tianhe District Patentee before: SOUTH CHINA University OF TECHNOLOGY |