CN100408805C - Oil-water media automatic cleaning filter - Google Patents
Oil-water media automatic cleaning filter Download PDFInfo
- Publication number
- CN100408805C CN100408805C CNB2006100759686A CN200610075968A CN100408805C CN 100408805 C CN100408805 C CN 100408805C CN B2006100759686 A CNB2006100759686 A CN B2006100759686A CN 200610075968 A CN200610075968 A CN 200610075968A CN 100408805 C CN100408805 C CN 100408805C
- Authority
- CN
- China
- Prior art keywords
- cylindrical shell
- water
- filter
- column type
- oil
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Filtration Of Liquid (AREA)
Abstract
The invention relates to an oil water medium automatic washing filter, which comprises a cylinder mounted on the base, a motor mounted on the upper cover of cylinder, an ultrasonic wave vibrator and filter core group mounted inside the cylinder, wherein said ultrasonic wave vibrator has one horizontal support, two ultrasonic wave vibrators downwards suspended on the support and weights; the filter core group has the transverse water distribute plate on the lower cylinder wall; the water distribute plate has filter element around its center; two vibrators are between the filter element and the cylinder wall and inside the circumference formed by filter elements; two vibrators and the weight form balance state; and the invention also comprises the water inlet tube, outlet tube and reflux tube with reflux system mounted at the upper part, lower part and bottom of cylinder; the motor via reducer, axle, coupler is connected to the vibrator group, to rotate the vibrators. The invention has high filter accuracy and wider application.
Description
Technical field
The present invention relates to the fine filtering device that oil recovery re-injection water in oil field uses, the oil-water media automatic cleaning filter that particularly a kind of low porosity and low permeability oil district uses.
Background technology
The low porosity and low permeability oil field reinjection water requires index very high to the SS's (suspended particulate substance) of water quality, accomplishes in general can only realize by membrane technology below the 5 μ m, and oil-field brine water quality situation very severe:
High oil-containing---need the micron filter device in oil-water media, can move continuously;
Sulphur and mineralizer content height---need anti-corrosion anti-scale;
Water quantity and quality changes greatly---and need strainer to handle strong shock resistance by intelligent emergency.Relative technological products has both at home and abroad:
The difficult point that any strainer faces has two:
1, the filtration of profit blending agent;
2, the on-line automatic anti-cleaning of strainer.
The producer of making the metal mesh type strainer both at home and abroad is a lot, but their product is relatively harsher to water quality requirement, and general oil content requires to be not more than 30PPm, and under the condition of this oil content, still needs regularly to shut down to carry out maintenance clean;
Its cleaning way has following several:
1, utilize the on-line automatic anti-cleaning of backwash pressure reduction, but need regularly to shut down maintenance clean, this strainer requires below 20PPm oil content;
2, external suction pump, with suction nozzle on-line continuous cleaning and filtering net, this strainer is very harsh to the requirement of oil content, and oil content requires less than 30PPm, otherwise equipment can't operate as normal;
3, for the strainer of strainer filtering precision greater than 25 μ m, with cutter scrape, mode cleaning and filtering net such as wire brush is scrubbed, but this Filter Precision is lower, the requirement that does not reach SS＜5 μ m.
For oil-polluted water, also do not have at present both at home and abroad extraordinaryly can resist the oil-water media automatic cleaning filter that oil, shock resistance again can on-line automatic anti-cleaning.
Summary of the invention
The object of the present invention is to provide a kind of oil-water media automatic cleaning filter, this automatic cleaning filter collection filters and cleans and is one, be applicable to anti-oil that oil field reinjection water uses, anticorrosive, antiscale, can the on-line intelligence processing, on-line auto-cleaning, filtering accuracy can realize suspended particulate substance SS＜5 μ m.
Technical scheme of the present invention is as follows:
Oil-water media automatic cleaning filter provided by the invention comprises:
One cylindrical shell 8; Described cylindrical shell 8 is installed on the base 4 with supporting;
One is positioned at the supersonic oscillator group 2 within the described cylindrical shell 8;
Described supersonic oscillator group 2 comprises: a horizontal stand 22 and be lifted on the first column type supersonic oscillator, 23, the second column type supersonic oscillators 24 and counterweight 21 on the horizontal stand 22 successively downwards;
One is positioned at the filter core group 3 within the described cylindrical shell 8;
Described filter core group 3 comprises: one is installed in the horizontal water distributing plate 31 on the described cylindrical shell 8 bottom barrels, be installed on the filter element 32 on the described horizontal water distributing plate 31 vertically upward, described filter element is a tubular element, by being screwed on the described water distributing plate 31 of tubular element bottom, and be that the center is circumference and arranges with described horizontal water distributing plate 31 centers;
The described first column type supersonic oscillator 23 is between described filter element 32 and described cylindrical shell 8 barrels; The described second column type supersonic oscillator 24 is positioned within the circumference that described filter element 32 surrounds; Be that fulcrum is reached equilibrium state mutually with described horizontal stand 22 centers between the described first column type supersonic oscillator 23, the second column type supersonic oscillator 24 and the counterweight 21;
One drive motors 1;
Described drive motors 1 is installed on center, described cylindrical shell 8 upper end, and is connected with described excusing from death ripple shake group 2 by reductor, axle, shaft coupling, drive the sub described first column type supersonic oscillator 23, the second column type supersonic oscillator 24 and the counterweight of organizing in 2 21 of excusing from death ripples shake by described horizontal stand 22 and rotate;
Also comprise, be installed in the water inlet pipe 7 on the described cylindrical shell 8 top barrels; Be installed in the outlet pipe 6 on described cylindrical shell 8 barrels under the horizontal support; Be installed in horizontal water distributing plate 31 centers and stretch out the gutter 5 of described cylindrical shell 8 bottoms.Described gutter (5) is return-flow system backwater return pipe.
Described 8 for making the stainless steel cylinder that anodic protection is handled.
Oil-water media automatic cleaning filter of the present invention, sewage enters from water inlet pipe 7 during work, and filtered water flows out from outlet pipe 6, and backwater flows out from gutter 5 during backwash.
Oil-water media automatic cleaning filter of the present invention comprises filtration state and two duties of backwash state, drive motors 1 drives the first column type supersonic oscillator 23 and 24 rotations of the second column type supersonic oscillator of excusing from death ripple shake group 2 all the time under two operating modes, so that filter core is carried out on-line cleaning.
Filter element is 40 tubular element groups, and filter core is screwed on the filter bottom water distributing plate by the bottom.
Sewage filters by filter element after entering from water inlet pipe, discharges from the outlet pipe 6 of filter bottom then, finishes whole filter process.
Oil-water media automatic cleaning filter provided by the invention, its advantage is as follows:
1, uses the ultrasonic wave on-line auto-cleaning, can definitely clean the carrying out of oil;
2, adopt the 316L stainless steel anticorrosive, and do anodic protection and handle in tank body, it is chloride that equipment can be applicable to
Change the water body of object height.
3, set up one recirculation water in tank base, make it water body in the tank body is caused moving, destroy the adhesion of impurity thing on filter screen, thereby prolong anti-(whether should be anti-) washing time greatly.
4, utilizing anti-(whether should be anti-) flushing pressure reduction to carry out online backflushing washes.
Ratio has that production capacity is big, automaticity is high, can realize automatic continuous operation, and cleaning is discharged by sewage draining exit automatically; The high characteristics of production efficiency efficient.
6, applied widely, can be widely used in the sewerage treatment of industries such as oil, chemical industry, iron and steel, papermaking, electric power, and the sewerage treatment of industry such as light industry environmental protection.
Description of drawings
Accompanying drawing 1 is a structural representation of the present invention;
Accompanying drawing 2 is used for the course of work schematic flow sheet of profit filtration system for oil-water media automatic cleaning filter of the present invention.
The specific embodiment:
Further describe the present invention below in conjunction with drawings and Examples:
Fig. 1 is a structural representation of the present invention; Have Fig. 1 as can be known, oil-water media automatic cleaning filter provided by the invention comprises:
One cylindrical shell 8; Described cylindrical shell 8 is installed on the base 4 with supporting;
One is positioned at the supersonic oscillator group 2 within the described cylindrical shell 8;
Described supersonic oscillator group 2 comprises: a horizontal stand 22 and be lifted on the first column type supersonic oscillator, 23, the second column type supersonic oscillators 24 and counterweight 21 on the horizontal stand 22 successively downwards;
One is positioned at the filter core group 3 within the described cylindrical shell 8;
Described filter core group 3 comprises: one is installed in the horizontal water distributing plate 31 on the described cylindrical shell 8 bottom barrels, be installed on the filter element 32 on the described horizontal water distributing plate 31 vertically upward, described filter element is a tubular element, by being screwed on the described water distributing plate 31 of tubular element bottom, be that the center is circumference and arranges with described horizontal water distributing plate 31 centers;
The described first column type supersonic oscillator 23 is between described filter element 32 and described cylindrical shell 8 barrels; The described second column type supersonic oscillator 24 is positioned within the circumference that described filter element 32 surrounds; Be that fulcrum is reached equilibrium state mutually with described horizontal stand 22 centers between the described first column type supersonic oscillator 23, the second column type supersonic oscillator 24 and the counterweight 21;
One drive motors 1;
Described drive motors 1 is installed on center, described cylindrical shell 8 upper end, and is connected with described excusing from death ripple shake group 2 by reductor, axle, shaft coupling, drive the sub described first column type supersonic oscillator 23, the second column type supersonic oscillator 24 and the counterweight of organizing in 2 21 of excusing from death ripples shake by described horizontal stand 22 and rotate;
Also comprise, be installed in the water inlet pipe 7 on the described cylindrical shell 8 top barrels; Be installed in the outlet pipe 6 on described cylindrical shell 8 barrels under the horizontal support; Be installed in horizontal water distributing plate 31 centers and stretch out the gutter 5 of described cylindrical shell 8 bottoms.
Described cylindrical shell 8 was for making the stainless steel cylinder that anodic protection is handled.
Oil-water media automatic cleaning filter provided by the invention, material therefor, components and parts all adopt corrosion-resistant material to manufacture, and all electric elements all adopt explosion-proof component to manufacture, and safety is reliable, durable in use.
The operating principle of oil-water media automation cleaning and filtrating equipment of the present invention is as follows:
Fig. 2 is used for the course of work schematic flow sheet of water treatment system for oil-water media automatic cleaning filter of the present invention.
The upper pipeline of Fig. 2 is the duty of this oil-water media automation cleaning and filtrating equipment
Among the figure, 40 is pipe-line mixer, and 50 is secondary sedimentation tank, 9 and 9 ' be flow meter, 10 is oil-water media automation cleaning and filtrating equipment of the present invention, and 1# is the 1# water pump, and 2# is the 2# water pump, and V1, V2, V3, V4 and V5 are valve, 60 is reservoir, and 70 is clear water reserviors, and 11 is reflux pipeline;
Its duty is as follows: close the 2# water pump, open the 1# water pump; Shut off valve V3, V4 and V5 open valve V1, V2; Pending former current through the secondary sedimentation tank post precipitation pass through this oil-water media automation cleaning and filtrating equipment, filter element in the filter is isolated the particle in the former water, particle greater than the filtration diameter is blocked, thereby reaches the purpose of filtration, purification, and the water after the purification flows into clear water reserviors.
After this filter work a period of time, the increase that is blocked grain amount can make filter element surface be polluted, and filter area reduces, and resistance increases, thereby influences filter capacity, and pressure reduction can raise; When pressure reduction was elevated to setting value, then start the program that filter element is cleaned: promptly open 1#, 2# water pump (1#, 2# water pump move simultaneously), shut off valve V1, V2 opened valve V3, V4 and V5; Open supersonic oscillator by drive motors 1, allow the dirt of sonic cleaning filter element surface earlier, then, carry out the on-line automatic cleaning of turning one's coat, cleaning pressure is 4kgf/cm
2About, flow is about 50m
3/ h, the pressure of turning one's coat is unsuitable too high, in order to avoid the infringement filter element adds a waterpower adjustment valve in the V4 front of water pump in the system, controlling anti-cleaning pressure is 4 kilograms of pressure requirements with satisfied cleaning.
Oil-water media automation cleaning and filtrating equipment of the present invention also can comprise a PLC controller, and this PLC controller can be controlled operation, cleaning, the blowdown of this oil-water media automation cleaning and filtrating equipment by setup program;
Selection of working parameters
The user can reasonably select the related parameter that has for the treatment of apparatus, reasonably flow and suitable pressure (flow 65m according to factors such as the content of the suspension of sewage and granularity, the amounts of disposing of sewage
3/ h, pressure≤4kgf/cm
2), to obtain satisfied treatment effect.(flow and pressure can design and adjust according to customer requirements)
The installation and debugging of oil-water media automation cleaning and filtrating equipment of the present invention:
Points for attention during installation:
1) equipment must use solid reliable suspender when handling, guarantees lifting safety.
2) equipment is placed on the basis, and anchor (bolt) hole is arranged on the plant bottom case, fixes with stone bolt, installs firmly with assurance equipment.
3) before the equipment operation, must check whether the connection at each position is reliable, and whether position wiring such as electrical control cubicles, power distribution cabinet are firm, correct, reliable.
4) relevant electrical system is please read relevant operation instruction in detail.
Points for attention during the commissioning test of equipment
1) inspection before the operation
(1) the checkout facility external mounting, erection bolt is fastening with the sealing situation.
(2) whether the checkout facility wiring position is correct, and particularly control system can not wrong, otherwise can make the working programme confusion, influences the use of equipment.
2) unloaded debugging
Not water filling earlier in the equipment connects in each one, wiring is correct, and firmly, under the reliable conditions, whether the equipment energising according to each working condition of program checkout, meets the requirements, and especially equipment operation, whether whether the cleaning program meets the requirements, works normal.
3) load test
(1) carries out load test after the unloaded debugging normally, feed the clear water operation earlier, check the sealing situation and the working condition of each one simultaneously.Each seals the position must not have leakage, work to meet the requirement of setting program.
Attention: during water filling in advance, it is littler that intake pressure and valve opening are wanted, to avoid damaging filter element.
(2) after the clear water test normally, can feed former water and test, note the pressure reduction situation of change of the Inlet and outlet water of facilities for observation in the test, according to circumstances set the pressure reduction or the time of cleaning.
3) equipment debugging normal after, can change normal operation over to, come into operation.
The use of oil-water media automation cleaning and filtrating equipment of the present invention:
After oil-water media automation cleaning and filtrating equipment debugging of the present invention finishes, change normal operation over to.Oil-water media automation cleaning and filtrating equipment of the present invention is during the runtime, and when moving water filling in advance for the first time, intake pressure and flow want littler, in order to avoid the infringement filter element.After the fills with water, can normally move.
Run duration, oil-water media automation cleaning and filtrating equipment of the present invention can be carried out automatic control, former water has water inlet pipe to enter, flow out from outlet pipe after the element filters after filtration, after using a period of time, filter element surface can be adhered to some filtrate, resistance is increased, the automatic pressure reduction of oil-water media automation cleaning and filtrating equipment meeting of the present invention according to Inlet and outlet water, open supersonic oscillator, allow the dirt of sonic cleaning filter element surface earlier, then, carry out the on-line automatic cleaning of turning one's coat, cleaning pressure is 4kgf/cm
2About, flow is about 50m
3/ h, the pressure of turning one's coat is unsuitable too high, in order to avoid damage filter element, in the detergent line of turning one's coat, a valve and pressure meter is arranged in the system, is adjusted pressure is met the requirements.
In order to prolong the blanking time of on-line cleaning, increased a cover return-flow system (gutter by the bottom refluxes) in the equipment, to reduce obstruction to filter element, capacity of returns can be adjusted by the manually-operated gate in the water return pipeline, capacity of returns is about the 20%-30% of inflow, determines according to the reading of flow meter.
Under normal operation, when pressure reduction reaches 1kgf/cm
2During the left and right sides, carry out on-line cleaning automatically, about 30 seconds of the scavenging period of turning one's coat.
The maintenance of oil-water media automation cleaning and filtrating equipment of the present invention
Equipment must have special operating personnel and attendant, and operating personnel answer per tour routine inspection, and record flow, pressure reduction, capacity of returns, backwashing pressure etc. are checked each sealing situation, find to leak, and in time get rid of.Check motor, whether work such as electromagnetic valve, supersonic oscillator are normal, note abnormalities in time to solve.
Make regular check on the filtered water quality, whether meet the filtering accuracy requirement, as do not reach requirement, must check whether filter element damages, if there is damage in time to change.
Make regular check on the insulation situation of column type supersonic oscillator and the anti-explosion safety situation of equipment, pinpoint the problems and in time get rid of, in order to avoid cause the accident.
Claims (3)
1. oil-water media automatic cleaning filter comprises:
One cylindrical shell (8); Described cylindrical shell (8) is installed on the base (4) with supporting;
One is positioned at the supersonic oscillator group (2) within the described cylindrical shell (8);
Described supersonic oscillator group (2) comprising: a horizontal stand (22) and be lifted on the first column type supersonic oscillator (23) on the horizontal stand (22) successively downwards, the second column type supersonic oscillator (24) and counterweight (21);
One is positioned at the filter core group (3) within the described cylindrical shell (8);
Described filter core group (3) comprising: one is installed in the horizontal water distributing plate (31) on the barrel of described cylindrical shell (8) bottom, be installed on the filter element (32) on the described horizontal water distributing plate (31) vertically upward, described filter element is a tubular element, by being screwed on the described water distributing plate (31) of tubular element bottom, and be that the center is circumference and arranges with described horizontal water distributing plate (31) center;
The described first column type supersonic oscillator (23) is positioned between described filter element (32) and described cylindrical shell (8) barrel; The described second column type supersonic oscillator (24) is positioned within the circumference that described filter element (32) surrounds; Be that fulcrum is reached equilibrium state mutually with described horizontal stand (22) center between the described first column type supersonic oscillator (23), the second column type supersonic oscillator (24) and the counterweight (21);
One drive motors (1);
Described drive motors (1) is installed on center, described cylindrical shell (8) upper end, and is connected with described excusing from death ripple shake son group (2) by reductor, axle and shaft coupling, drive the sub described first column type supersonic oscillator (23), the second column type supersonic oscillator (24) and the counterweight of organizing in (2) (21) of excusing from death ripple shake by described horizontal stand (22) and rotate;
Also comprise, be installed in the water inlet pipe (7) on the barrel of described cylindrical shell (8) top; Be installed in the outlet pipe (6) on described cylindrical shell (8) barrel under the horizontal support; Be installed in horizontal water distributing plate (31) center and stretch out the gutter (5) of described cylindrical shell (8) bottom.
2. by the described oil-water media automatic cleaning filter of claim 1, it is characterized in that described cylindrical shell (8) was for making the stainless steel cylinder that anodic protection is handled.
3. by the described oil-water media automatic cleaning filter of claim 1, it is characterized in that described gutter (5) is the reflux return pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100759686A CN100408805C (en) | 2006-04-25 | 2006-04-25 | Oil-water media automatic cleaning filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100759686A CN100408805C (en) | 2006-04-25 | 2006-04-25 | Oil-water media automatic cleaning filter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1920252A CN1920252A (en) | 2007-02-28 |
| CN100408805C true CN100408805C (en) | 2008-08-06 |
Family
ID=37778075
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100759686A Expired - Fee Related CN100408805C (en) | 2006-04-25 | 2006-04-25 | Oil-water media automatic cleaning filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100408805C (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2410287Y (en) * | 1999-12-17 | 2000-12-13 | 潘惠祖 | Oil water separator |
| CN2683632Y (en) * | 2004-03-25 | 2005-03-09 | 樊利华 | Integrated apparatus for high efficiency ultrasonic treatment of oil sewage |
| GB2396412B (en) * | 2002-11-27 | 2005-12-14 | Schlumberger Holdings | Assessing downhole wbm-contaminated connate water |
| US7140440B2 (en) * | 2002-12-10 | 2006-11-28 | Halliburton Energy Services, Inc. | Fluid loss additives for cement slurries |
| CN200977429Y (en) * | 2006-10-17 | 2007-11-21 | 北京中天油石油天然气科技有限公司 | Oil-water medium automatic cleaning filter device suitable for low porosity and low permeability oil field |
-
2006
- 2006-04-25 CN CNB2006100759686A patent/CN100408805C/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2410287Y (en) * | 1999-12-17 | 2000-12-13 | 潘惠祖 | Oil water separator |
| US7028773B2 (en) * | 2001-11-28 | 2006-04-18 | Schlumberger Technology Coporation | Assessing downhole WBM-contaminated connate water |
| GB2396412B (en) * | 2002-11-27 | 2005-12-14 | Schlumberger Holdings | Assessing downhole wbm-contaminated connate water |
| US7140440B2 (en) * | 2002-12-10 | 2006-11-28 | Halliburton Energy Services, Inc. | Fluid loss additives for cement slurries |
| CN2683632Y (en) * | 2004-03-25 | 2005-03-09 | 樊利华 | Integrated apparatus for high efficiency ultrasonic treatment of oil sewage |
| CN200977429Y (en) * | 2006-10-17 | 2007-11-21 | 北京中天油石油天然气科技有限公司 | Oil-water medium automatic cleaning filter device suitable for low porosity and low permeability oil field |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1920252A (en) | 2007-02-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR102081960B1 (en) | Non-point source contaminant treatment system using variable filtration | |
| EP2889067B1 (en) | Method and apparatus for a vertical lift decanter system in a water treatment system | |
| US8658031B2 (en) | Method and apparatus for treating liquid containing impurities | |
| CN105833578B (en) | Water treatment facilities and system | |
| CN200977429Y (en) | Oil-water medium automatic cleaning filter device suitable for low porosity and low permeability oil field | |
| CN107601725A (en) | A kind of container-type garbage percolation liquid treating system and technique | |
| KR101359340B1 (en) | Automatic backwashing of filtering device for washing water | |
| KR102382837B1 (en) | Cyclone separator for wasterwater and Apparatus monitoring wastewater using the same | |
| CN104667627B (en) | The filter mechanism of a kind of filter and do not block high accuracy effluent filter | |
| CN2677366Y (en) | Medium and small size integrated reverse asmosis sea water desalination device | |
| CN100408805C (en) | Oil-water media automatic cleaning filter | |
| CN211411872U (en) | Industrial waste water multilayer stirring environmental protection multiple filtration device | |
| CN105417832B (en) | A kind of integrated intelligence oilfield produced water processing unit and method | |
| CN208145600U (en) | A kind of backwash automatic filter based on PLC | |
| KR20020024008A (en) | Oil-Water Separator which is equipped with Mash Plate Filter Module | |
| CN212327957U (en) | Self-cleaning intelligent ultrafiltration membrane pool device | |
| KR101320304B1 (en) | Automatic Backwashing Apparatus For Sand Filters By Using Flow Rate Change | |
| CN207401590U (en) | A kind of reversal magnetic filter | |
| CN105214359B (en) | Sewage disposal system and sewage water treatment method | |
| CN108160326A (en) | A kind of reversal magnetic filter | |
| CN204582740U (en) | A kind of filter mechanism of filter and do not block high accuracy effluent filter | |
| CN2406715Y (en) | Filter for continuously recirculating sand-washing | |
| CN216472605U (en) | Continuous purification quicksand filter | |
| Hermans | Auto-line filter: self-cleaning, continuous filtration system | |
| CN2571749Y (en) | Lysine waste water purifier |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Oil-water media automatic cleaning filter Effective date of registration: 20110627 Granted publication date: 20080806 Pledgee: Beijing's first investment Company Limited by Guarantee Pledgor: Sino-Gas & Oil Technology Co., Ltd. Registration number: 2011990000242 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080806 Termination date: 20210425 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |