CN104436778A - Large continuous automatic sand filter - Google Patents
Large continuous automatic sand filter Download PDFInfo
- Publication number
- CN104436778A CN104436778A CN201410645903.5A CN201410645903A CN104436778A CN 104436778 A CN104436778 A CN 104436778A CN 201410645903 A CN201410645903 A CN 201410645903A CN 104436778 A CN104436778 A CN 104436778A
- Authority
- CN
- China
- Prior art keywords
- sand
- tube
- water
- inlet pipe
- water inlet
- 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.)
- Granted
Links
Landscapes
- Filtration Of Liquid (AREA)
Abstract
The invention relates to a large continuous automatic sand filter which comprises a filter container, and a sand filtering layer, a sand extracting tube, a sand washing device and a water inlet pipe arranged in the container, wherein a clear water chamber is arranged on the sand filtering layer and is communicated with a water outlet; the bottom of the sand extracting tube is straight, the upper part of the sand extracting tube is bent at a right angle, the diameter of the horizontal tube at the right-angle bending part is larger than that of a vertical tube at the right-angle bending part, and the horizontal tube enters the sand washing device from the side surface; the water inlet pipe is connected with a radiation type water distributor; water distribution tubes of the radiation type water distributor are evenly arranged in a radial way by taking the water inlet pipe as a center; the water distribution tubes are inclined downwards at an angle of 3 degrees from the outer edge to the water inlet pipe. According to the large continuous automatic sand filter, the sand extracting tube enters the sand washing device from the side surface, and the bottom of the sand extracting tube is straight, so that 30% of air can be reduced; the air supply pressure is reduced to 0.6MPa from 0.8MPa, so that about 35% of energy consumption is saved, the abrasion of the inner wall of the sand extracting tube can be alleviated, and the sand extracting work can be easily carried out normally; furthermore, the solid-liquid mixture lifted by the sand extracting tube enters the thick horizontal tube from the thin vertical tube, and the kinetic energy of the compressed air is completely released, so that the impact of filter material on the sand washing device can be reduced.
Description
One, technical field:
What the present invention relates to is can the water treatment facilities of continuous wash filtrate, and what be specifically related to is the Large Scale and Continuous automatic sand filter being particularly useful for processing oil-contaminated water of oil field.
Two, background technology:
Current oil field generally adopts three sections for the treatment of process, i.e. " sedimentation-coagulation-filtration " technique, in this technique, pressure filter tank needs regular backwash, run just to there will be that filtrate hardens after a period of time, media regeneration difficulty, internal structure damage, filterins media run-off, the phenomenon such as deteriorating water quality after filter.Continuous sand filtration is a kind of novel water treatment facilities, and the maximum gauge that continuous sand filter is used both at home and abroad is at present only 2.6m, does not substantially have too large actual application value to the process of polymer-containing sewage in oil field and ternary sewage; The materials such as a large amount of oils, colloid, polymer make the large reduction of its treating capacity, high concentration polymer-bearing waste-water complicated in oilfield sewage and ternary sewage are easily caused that filtrate hardens, media regeneration difficulty, internal structure are damaged, filterins media run-off and the phenomenon such as water quality is unstable, and be influenced by ambient temperaturely positioned over indoor location, operation only, above-mentioned situation 2.6m diameter and following continuous sand filter cannot head it offs.
The sand extraction tube of existing another kind of continuous automatic sand filter upwards inserts sand-washing device bottom filtering container, and airduct is communicated with the bottom of sand extraction tube, and bending is arranged at the bottom of sand extraction tube, and this to cause carrying in sand process and easily interrupts or do not carry sand, the easily normal work of impact; In addition, the solidliquid mixture that sand extraction tube elevates directly gushes out, and impact greatly lower to sand-washing device baffle plate, sand-washing device easily damages.Simultaneously, the water inlet pipe of this continuous automatic sand filter connects radiant type water feed apparatus, the water distributor of radiant type water feed apparatus is centered by water inlet pipe, radially, be distributed on the periphery of water inlet pipe, before filter when water quality extreme difference, the inner easily blocking of water-locator, cause amount of inlet water low, build the pressure phenomenon.
Three, summary of the invention:
The object of this invention is to provide a kind of Large Scale and Continuous automatic sand filter, this Large Scale and Continuous automatic sand filter for solve existing continuous sand filter internal structure fragile, build the pressure, the problem of water quality instability.
The technical solution adopted for the present invention to solve the technical problems is: this Large Scale and Continuous automatic sand filter comprises sand filter blanket, sand extraction tube, sand-washing device, water inlet pipe in filtering container, container, it is clean water chamber above sand filter blanket, clean water chamber is communicated with delivery port, straight bottom sand extraction tube, quarter bend is arranged at the top of sand extraction tube, and the caliber of the horizontal tube of quarter bend is larger than the caliber of vertical tube, horizontal tube enters sand-washing device from the side; Water inlet pipe connects radiant type water-locator, and the water distributor of radiant type water-locator, centered by water inlet pipe, is evenly arranged radially, water distributor from outward flange to water inlet pipe place be 3 degree downward-sloping.
In such scheme, the caliber of the horizontal tube of sand extraction tube top quarter bend is 2 times of vertical tube caliber, arrange outside sand extraction tube and automatically carry sand blast block apparatus, to improve the stability that filtrate promotes, the caliber of horizontal tube is that the solidliquid mixture elevated is delivered in sand-washing device by vertical tube caliber 2 times just, and can reach minimum by the impact of sand-washing device.
In such scheme, water distributor communicates with backwash tube, water distributor is evenly arranged radially relative to backwash tube, backwash tube is connected with blow-down pipe, blow-down pipe is installed backwash motor-driven valve, the entrance inlet porting motor-driven valve of water inlet pipe, water inlet pipe also arranges pressure transmitter, and water outlet arranges outlet electric valve, pressure transmitter connects PLC control system, and PLC control system connects backwash motor-driven valve, entrance motor-driven valve, outlet electric valve respectively.
In such scheme, the filtrate of sand filter blanket adopts quartz sand filter media or corundum filtrate, and quartz sand filter media is applicable to the process that common polymer-bearing waste-water and high concentration polymer drive sewage; Corundum filtrate is applicable to the process of strong base ternary sewage and weak base ternary sewage.
Filtering container diameter in such scheme is four meters, and tank base cone angle is 71 degree, solves 2.6m diameter and the insurmountable problem of following continuous sand filter.
Sand-washing device in such scheme has three covers, bottom sand-washing device, air-floating apparatus is housed.
Install the sand separator of umbrella shape below water inlet pipe in such scheme, sand separator can play the effect of sub-sand on the one hand, and the sand fallen on it is fallen equably along umbrella shape face; In addition, the water be sprayed onto on it can, along movement in a curve upwards, make it can also play the effect of water distribution uniformity.
Beneficial effect:
1, sand extraction tube of the present invention enters sand-washing device and bottom is straight from the side, and can save tolerance 30%, supply gas pressure is down to 0.6Mpa by 0.8Mpa, saves energy consumption about 35%, and decreases the wearing and tearing of sand extraction tube inwall, be easy to propose sand operation working properly; Simultaneously the solidliquid mixture that elevates of sand extraction tube is from thin vertical tube to thick horizontal tube, and compressed-air actuated kinetic energy is completely released, and decreases the impact of filtrate to sand-washing device.
2, water distributor of the present invention near tank side be 3 degree downward-sloping, and be equipped with water-locator back purge system, when the blocking of water distributor inside, the automatic valve of water-locator back purge system is opened, back with water inlet line valve closing, instead arranges flushing, and 3 degree of inclinations of water distributor are easy to inner dirt and flow out tank body.
3, treating capacity of the present invention is large, simultaneously three cover sand-washing devices filtrate can be cleaned more thorough.
4, automatic blowing device is mainly and avoids in particular cases not proposing sand work and a kind of precautionary measures taked, and once blow stifled work at a fixed time, each stifled time of blowing can arbitrarily be arranged, and interval time also can arbitrarily be arranged.
Four, accompanying drawing illustrates:
Fig. 1 is structural representation of the present invention.
1 filtering container 2 sand extraction tube 3 sand-washing device 4 water inlet pipe 5 water leg 6 mill weir 7 delivery port 8 blow-off pipe 9 sewage chamber 10 sand separator 11 air-floating apparatus 12 horizontal tube 13 water distributor 14 entrance motor-driven valve 15 pressure transmitter 16 outlet electric valve 17 backwash motor-driven valve 18 backwash tube 19PLC control system 20 blow-down pipe.
Five, detailed description of the invention:
Below in conjunction with accompanying drawing, the present invention is described further:
As shown in Figure 1, this Large Scale and Continuous automatic sand filter comprises filtering container 1, and filtering container 1 diameter is four meters, and tank base cone angle is 71 degree.Container content has certain thickness filtrate, forms sand filter blanket, and the filtrate of sand filter blanket adopts quartz sand filter media or corundum filtrate, and quartz sand filter media is applicable to the process that common polymer-bearing waste-water and high concentration polymer drive sewage; Corundum filtrate is applicable to the process of strong base ternary sewage and weak base ternary sewage.Be clean water chamber above sand filter blanket, clean water chamber is provided with water leg 5, and water leg 5 is arranged on the inwall of filtering container 1, and in the form of a ring, water leg 5 is provided with height-adjustable sewage mill weir 6, and water leg 5 connects delivery port 7; Water inlet pipe 4 is arranged on the top of filtering container 1, and be positioned at below blow-off pipe 8, be then inserted into the bottom of sand filter blanket along down at right angles, water inlet pipe 4 connects radiant type water-locator, and under water inlet pipe, 4 sides install the sand separator 10 of umbrella shape; Sand-washing device 3 connects sewage chamber 9, sewage chamber 9 connects the blow-off pipe 8 led to outside filtering container, sewage chamber 9 top is lower than water leg 5 horizontal plane, the top of sand-washing device 3 is umbrella shape, air-floating apparatus 11 is housed bottom sand-washing device 3, sand-washing device 3 is looped around centre by the sewage mill weir 6 of water leg 5, and washed-out sand sewage and clear water are kept apart.
Be straight bottom sand extraction tube 2, quarter bend is arranged at the top of sand extraction tube 2, and the caliber of the horizontal tube 12 of crook, right angle, sand extraction tube 2 top is 2 times of vertical tube caliber, and horizontal tube 12 enters sand-washing device 3 from the side, and airduct is communicated with the bottom of sand extraction tube 2.The solidliquid mixture that sand extraction tube 2 elevates is from thin vertical tube to thick horizontal tube 12, compressed-air actuated kinetic energy is completely released, decrease the impact of filtrate to sand-washing device 3, and saving energy consumption, sand operation working properly is proposed in guarantee, solve to carry in sand process and easily interrupt or do not carry sand, the problem of the easily normal work of impact.
Arrange outside sand extraction tube 2 and automatically carry sand blast block apparatus, automatic blowing device is mainly to be avoided in particular cases not proposing sand work and a kind of precautionary measures taked, stifled work is once blown at a fixed time, each stifled time of blowing can arbitrarily be arranged, interval time also can arbitrarily be arranged, and improves the stability that filtrate promotes.
Water inlet pipe 4 connects radiant type water-locator, and the water distributor 13 of radiant type water-locator, centered by water inlet pipe 4, is evenly arranged radially, water distributor 4 from outward flange to water inlet pipe place be 3 degree downward-sloping; Water distributor 4 communicates with backwash tube 18, water distributor 4 is evenly arranged radially relative to backwash tube 18, backwash tube 18 is connected with blow-down pipe 20, blow-down pipe 20 is installed backwash motor-driven valve 17, the entrance inlet porting motor-driven valve 14 of water inlet pipe 4, water inlet pipe 4 also arranges pressure transmitter 15, and delivery port 7 place arranges outlet electric valve 16, pressure transmitter 15 connects PLC control system 19, and PLC control system 19 connects backwash motor-driven valve 17, entrance motor-driven valve 14, outlet electric valve 16 respectively.Entrance motor-driven valve 14, the outlet electric valve 16 of backwash tube 18, blow-down pipe 20, backwash motor-driven valve 17, pressure transmitter 15, PLC control system 19, water inlet pipe form back purge system.When the blocking of water distributor 4 inside, when inlet pressure is elevated to setting value, anti-row's flushing operation starts, now entrance motor-driven valve 14 cuts out, and outlet electric valve 16 is opened, and backwash motor-driven valve 17 is opened, after anti-row's operation reaches setting-up time, entrance motor-driven valve 14 is opened, and outlet electric valve 16 is closed, and backwash motor-driven valve 17 cuts out.3 degree of inclinations of water distributor are easy to inner dirt and flow out tank body, are beneficial to the inner dirt of water-locator and discharge, ensure that water inlet is carried out smoothly, and when solving water quality extreme difference before filter, the inner easily blocking of water-locator, cause amount of inlet water low, build the pressure phenomenon.
In present embodiment, sand-washing device 3 has three covers, bottom sand-washing device 3, air-floating apparatus is housed, three cover sand-washing devices 3 share a set of air-floating apparatus, sand extraction tube 2 also has three, and sand extraction tube 2 inserts in corresponding sand-washing device 3 separately, and three cover sand-washing devices 3 are connected to a sewage chamber 9 jointly by pipeline, airduct is connected with three sand extraction tubes 2 with pipeline by a gas distributor, wind is supplied to respectively three sand extraction tubes 2.Certainly, sand-washing device 3 can also be connected with respective sewage chamber, and sewage is discharged by a blow-off pipe 8 by three sewage chamber.
When the present invention works, oil-polluted water directly enters the bottom of Large Scale and Continuous automatic sand filter by pipeline, under the effect of the radiant type water-locator bottom filtering container 1, the upwards operation that sewage is mild, filtration treatment is carried out by filtrate, clear water is slowly flowed out by delivery port 7, this completes filter process, in whole filter process, the filter bed of device interior is continuous, slow, stable descending motion state, effluent quality and can not affecting by it, ensures to reach desirable filter effect in effective filtering layer, in the process of filtering oily sewage, sump oil and a large amount of suspensions are trapped in the bottom of filtering container 1 by filtrate, therefore, this part dirty sand to be promoted in sand-washing device 3 by the sand extraction tube of bottom filtering container 12 and to clean by this part contaminated filtrate, dirty sand in sand-washing device 3 carries out irregular falling motion in a kind of special space of curves, the mutual collision friction of this part filtrate is made to make it be washed by dirt of filter material surface, for ensureing the more thorough of filtrate cleaning, air-floating apparatus 11 is housed bottom sand-washing device 3, its objective is and some difficult dirts removed of filter material surface are rinsed again, it is made to reach best cleaning performance, filtrate after cleaning again falls back to filter bed and carries out work, keep filtrate to be in clean conditions always, the blow-off pipe 8 that washed-out sand sewage is also isolated from one with clear water zone is discharged, so just achieve to filter and carry out the non-interfering course of work with cleaning simultaneously.
Filter process of the present invention and cleaning process are carried out simultaneously, do not affect mutually by it, while raw water quality change, can adjust, ensure the cleaning performance of filtrate to the washed-out sand amount of scrubbing system.
The present invention is mainly used in oilfield water flooding sewage, polymer-bearing waste-water and ternary sewage, can be placed in outdoor, and high severe cold area can normally use.
Claims (7)
1. a Large Scale and Continuous automatic sand filter, it is characterized in that: this Large Scale and Continuous automatic sand filter comprises sand filter blanket, sand extraction tube (2), sand-washing device (3), water inlet pipe (4) in filtering container (1), container, it is clean water chamber above sand filter blanket, clean water chamber is communicated with delivery port (7), sand extraction tube (2) bottom is straight, quarter bend is arranged at the top of sand extraction tube (2), and the caliber of the horizontal tube of crook, right angle (12) is larger than the caliber of vertical tube, horizontal tube (12) enters sand-washing device (3) from the side; Water inlet pipe (4) connects radiant type water-locator, the water distributor (13) of radiant type water-locator is centered by water inlet pipe (4), be evenly arranged radially, water distributor (13) from outward flange to water inlet pipe (4) place be 3 degree downward-sloping.
2. Large Scale and Continuous automatic sand filter according to claim 1, it is characterized in that: the caliber of the horizontal tube (12) of described crook, sand extraction tube (2) right angle, top is 2 times of vertical tube caliber, arranges and automatically carry sand blast block apparatus outside sand extraction tube (2).
3. Large Scale and Continuous automatic sand filter according to claim 1 and 2, it is characterized in that: described water distributor (13) communicates with backwash tube (18), water distributor (13) is evenly arranged radially relative to backwash tube (18), backwash tube (18) is connected with blow-down pipe (20), blow-down pipe (20) is upper installs backwash motor-driven valve (17), the entrance inlet porting motor-driven valve (14) of water inlet pipe (4), water inlet pipe (4) is also arranged pressure transmitter (15), delivery port (7) place arranges outlet electric valve (16), pressure transmitter (15) connects PLC control system (19), PLC control system (19) connects backwash motor-driven valve (17) respectively, entrance motor-driven valve (14), outlet electric valve (16).
4. continuous automatic sand filter according to claim 3, is characterized in that: described filtering container (1) diameter is four meters, and tank base cone angle is 71 degree.
5. Large Scale and Continuous automatic sand filter according to claim 4, is characterized in that: the filtrate of described sand filter blanket adopts quartz sand filter media or corundum filtrate, and quartz sand filter media is applicable to the process that common polymer-bearing waste-water and high concentration polymer drive sewage; Corundum filtrate is applicable to the process of strong base ternary sewage and weak base ternary sewage.
6. Large Scale and Continuous automatic sand filter according to claim 5, is characterized in that: described sand-washing device (3) has three covers, and air-floating apparatus (11) is equipped with in sand-washing device (3) bottom.
7. Large Scale and Continuous automatic sand filter according to claim 6, it is characterized in that: the sand separator (10) of umbrella shape is installed in described water inlet pipe (4) below, and backwash tube (18) communicates with water-locator through umbrella shape sand separator (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410645903.5A CN104436778B (en) | 2014-11-05 | 2014-11-05 | Large Scale and Continuous automatic sand filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410645903.5A CN104436778B (en) | 2014-11-05 | 2014-11-05 | Large Scale and Continuous automatic sand filter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104436778A true CN104436778A (en) | 2015-03-25 |
| CN104436778B CN104436778B (en) | 2016-08-24 |
Family
ID=52883997
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410645903.5A Active CN104436778B (en) | 2014-11-05 | 2014-11-05 | Large Scale and Continuous automatic sand filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104436778B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106621493A (en) * | 2016-12-06 | 2017-05-10 | 欧盛腾水处理技术（杭州）有限公司 | Horizontal flow continuous sand filtration equipment and water treatment process thereof |
| WO2018103534A1 (en) * | 2016-12-06 | 2018-06-14 | 欧盛腾水处理技术（杭州）有限公司 | Horizontal-flow continuous sand filtration apparatus and water treatment process thereof |
| CN109011741A (en) * | 2018-10-09 | 2018-12-18 | 江苏神洲环境工程有限公司 | A kind of upper up-flow continous way integrative water purifying device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07718A (en) * | 1991-11-05 | 1995-01-06 | Hayakawa Kogyo Kk | Continuous filter |
| CN201543289U (en) * | 2009-11-12 | 2010-08-11 | 吴浩 | Continuous automatic sand filter |
| CN102389657A (en) * | 2011-11-25 | 2012-03-28 | 罗文峰 | Continuous sand filtration apparatus |
| CN103908811A (en) * | 2013-01-04 | 2014-07-09 | 扬州龙华环境工程有限公司 | Self-cleaning quick sand filter |
| KR101434825B1 (en) * | 2014-06-03 | 2014-09-24 | 주식회사 화일씨앤이 | High flow sand filter |
-
2014
- 2014-11-05 CN CN201410645903.5A patent/CN104436778B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07718A (en) * | 1991-11-05 | 1995-01-06 | Hayakawa Kogyo Kk | Continuous filter |
| CN201543289U (en) * | 2009-11-12 | 2010-08-11 | 吴浩 | Continuous automatic sand filter |
| CN102389657A (en) * | 2011-11-25 | 2012-03-28 | 罗文峰 | Continuous sand filtration apparatus |
| CN103908811A (en) * | 2013-01-04 | 2014-07-09 | 扬州龙华环境工程有限公司 | Self-cleaning quick sand filter |
| KR101434825B1 (en) * | 2014-06-03 | 2014-09-24 | 주식회사 화일씨앤이 | High flow sand filter |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106621493A (en) * | 2016-12-06 | 2017-05-10 | 欧盛腾水处理技术（杭州）有限公司 | Horizontal flow continuous sand filtration equipment and water treatment process thereof |
| WO2018103534A1 (en) * | 2016-12-06 | 2018-06-14 | 欧盛腾水处理技术（杭州）有限公司 | Horizontal-flow continuous sand filtration apparatus and water treatment process thereof |
| CN109011741A (en) * | 2018-10-09 | 2018-12-18 | 江苏神洲环境工程有限公司 | A kind of upper up-flow continous way integrative water purifying device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104436778B (en) | 2016-08-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205324243U (en) | Axle housing ultrasonic cleaning line | |
| CN203017830U (en) | Continuous type sand filter | |
| CN104436778B (en) | Large Scale and Continuous automatic sand filter | |
| CN103908811A (en) | Self-cleaning quick sand filter | |
| CN203620385U (en) | Quick flow splitting dirt removal device | |
| CN104338350A (en) | Automatic and continuous cleaning and filtering apparatus of quicksand | |
| CN205461581U (en) | Water curtain dust removing device | |
| CN108236800A (en) | Continous way hangs dirt filtering device and filtering, back-flushing method | |
| CN101704591B (en) | Sewage treatment method and device thereof | |
| CN110898521B (en) | Waste water spraying and filtering treatment device | |
| CN201799196U (en) | Steel structure dust removing device | |
| CN201543289U (en) | Continuous automatic sand filter | |
| CN210559684U (en) | Ion air-flotation three-in-one purifier | |
| CN104436774B (en) | Mechanical filter | |
| CN111686486A (en) | Movable medium filtering device | |
| CN206457268U (en) | A kind of flotation tank with scraping dirt mechanism | |
| CN205323441U (en) | A dust processing system for handling benzoylurea insecticides product | |
| CN110817872B (en) | Granular activated carbon water rinsing device | |
| CN203342540U (en) | Filter for farmland drip irrigation | |
| CN210544287U (en) | Packed tower for capturing industrial carbon dioxide | |
| CN209423036U (en) | A kind of automatic backwash sandrock filter | |
| CN209226616U (en) | A kind of boiler replenishing water Water feeding treatment device | |
| CN203620387U (en) | Quick flow splitting dirt removal device with rotary sleeve | |
| CN206152421U (en) | Down to continuous sand filter of STREAMING | |
| CN206325359U (en) | A kind of twin-stage Water-bath silk net efficiency dust catcher |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| CB03 | Change of inventor or designer information |
Inventor after: Liu Jinpeng Inventor after: Liu Rongchen Inventor after: Huo Yuxiang Inventor after: Huo Ran Inventor before: Liu Rongchen Inventor before: Lv Jingchun Inventor before: Liu Jinpeng |
|
| COR | Change of bibliographic data | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210621 Address after: Room 335 and 337, building 1, emerging industry incubator, No.32, Huoju new street, high tech Zone, Daqing City, Heilongjiang Province Patentee after: Daqing Xinhua Star Technology Development Co.,Ltd. Address before: 163316 Room 202, gate 1, 14 Xueyuan community, Saertu District, Daqing City, Heilongjiang Province Patentee before: Liu Rongchen |
|
| TR01 | Transfer of patent right |