CN204079541U - A kind of device waste water containing lower concentration sump oil being carried out to degree of depth oil removing - Google Patents

A kind of device waste water containing lower concentration sump oil being carried out to degree of depth oil removing Download PDF

Info

Publication number
CN204079541U
CN204079541U CN201420256055.4U CN201420256055U CN204079541U CN 204079541 U CN204079541 U CN 204079541U CN 201420256055 U CN201420256055 U CN 201420256055U CN 204079541 U CN204079541 U CN 204079541U
Authority
CN
China
Prior art keywords
oil
layer
housing
degree
fiber
Prior art date
Application number
CN201420256055.4U
Other languages
Chinese (zh)
Inventor
杨强
许萧
卢浩
王朝阳
杨森
Original Assignee
华东理工大学
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 华东理工大学 filed Critical 华东理工大学
Priority to CN201420256055.4U priority Critical patent/CN204079541U/en
Application granted granted Critical
Publication of CN204079541U publication Critical patent/CN204079541U/en

Links

Abstract

The utility model relates to a kind of device to carrying out degree of depth oil removing containing the waste water of lower concentration sump oil, comprises housing, feed-pipe, rectifier, fibre conglomerates layer, ripple idetified separation layer, and several part such as liquid level meter.This technology separation efficiency is high, energy consumption is little, cycle of operation is long, can be widely used in each containing lower concentration sump oil wastewater treatment process.

Description

A kind of device waste water containing lower concentration sump oil being carried out to degree of depth oil removing
Technical field
The invention belongs to field of Environment Protection oily water separation technique, be specifically related to a kind of device containing the waste water advanced oil removing of lower concentration sump oil.
Background technology
Along with the increasingly stringent of environmental protection, more and more higher to the requirement of oily(waste)water degree of depth oil removing, as offshore oil exploitation sewage with oil index was brought up to 10mg/L by former 20mg/L by China; Also improving containing oil index of biochemical treatment is entered in sewage farm.
The process complexity of oily(waste)water is different and variant with composition with the state of its source and greasy dirt.Its treatment process can be divided into Physical (sedimentation, machinery, centrifugal, coarse, filtration, membrane sepn etc.) by principle: physico-chemical processes (flotation, absorption, ion-exchange, electrolysis etc.); Chemical method (cohesion, acidifying, saltout); Biochemical process (active sludge, biological filter, oxidation pond) etc.
Just mainly adopt compact type oil removal by air bubbling technology (Compact Flotation Unit, CFU) degreasing technique containing sewage of low concentration at present.Air-flotation process method passes into air exactly in waste water, and separate out from water with micro-bubble form and become carrier, the pollution substances such as the oil in water emulsion in waste water, small suspended particle are made to stick on bubble, the water surface is floated to bubble, form foam one gas, water, particle (oil) three-phase mixture, the object reaching separating impurity by collection foam or scum silica frost, purify liquid waste.Flotation process is mainly used to process in waste water and is difficult to by natural subsidence or floating the small suspended particle that the oil in water emulsion removed or relative density are bordering on 1.The compact air-floating apparatus (CFU) of what current application was more is Epcon company of Norway, rotary centrifugal force and degassed air flotation technology are combined, generally oil content mass concentration can be reduced to 15-20mg/L, parallel running can make oil content mass concentration be reduced to below 10mg/L.
But affect pneumatically supported many factors, no matter which kind of air flotation technology, the primary process occurred is all that bubble and oil droplet come in contact, and therefore the distribution of bubble diameter, bobble rise velocity and bubble all can have influence on the effect of oil removing; Secondly attachment and the parcel of bubble and oil droplet is also needed after contact; And the fluid state in air flotation tank also can affect air flotation effect, as adhered to rear bubble disengagement, bubble with impacts such as water bleeders, therefore relatively operate control more complex.The energy consumption of air flotation technology is also relatively high in addition, the follow-up problem that also there is the follow-up liquid gas such as gas band oil droplet rising, gas-liquid separation and scum silica frost process.
Chinese invention patent (CN 101972559B) give another kind of oily-water seperating equipment and oil-water separation method, and this patent of invention contains three kinds of separation methods such as eddy flow, coalescent and air supporting, can effectively by oily water separation.But this equipment is mainly used in the oily water separation of crude oil, to containing the waste water advanced oil removing of lower concentration sump oil inapplicable.
China's utility model (200920252001.X) gives a kind of coalescence plate oil-water separator, is provided with housing and imports and exports coalescent part in part and housing, and exit portion is provided with scum dredger, have reasonable oil-water separation.But this equipment is mainly used in the pre-treatment of oily(waste)water, do not reach the requirement of waste water advanced oil removing yet.
Therefore this area in the urgent need to cost of development low and effective, energy consumption low containing lower concentration sump oil efficient low-consume degreasing technique.
Summary of the invention
In order to solve above-mentioned the deficiencies in the prior art, the invention provides a kind of method containing the waste water advanced oil removing of lower concentration sump oil and device thereof, concrete technical scheme is as follows:
Waste water containing lower concentration sump oil is carried out to a device for degree of depth oil removing, described device comprises housing, oily(waste)water import, fluid rectifier, fibre conglomerates separating layer, ripple idetified separation layer, fibre conglomerates supplementary set layer, oil bag, the outlet of purification aqueous phase;
Wherein, described oily(waste)water import is at the upper one end of described housing, and described oil wraps in the top the other end of described housing; Described oil bag has liquid level meter, and the top of described oil bag is provided with oil phase outlet; Described purification aqueous phase outlet is positioned at the bottom of described housing, and the outlet of this purification aqueous phase is wrapped relative with described oil or slightly arranges to deviation; Fluid rectifier, fibre conglomerates separating layer, ripple idetified separation layer, fibre conglomerates supplementary set layer are positioned at the inside of described housing and conjointly do not arrange mutually successively, wherein, described fluid rectifier is near described oily(waste)water import, and the area of described fibre conglomerates supplementary set layer is 30 ~ 80% of fluid cross-sectional flow area and is in the bottom of described fluid flow section.
Described housing is horizontal circular tank, or horizontal rectangular parallelepiped tank.
Described fibre conglomerates separating layer is the X-shaped braid that oleophilic drainage fiber and hydrophilic oleophobic fibers weaving are formed, and wherein lipophilic-hydrophobic property fiber and horizontal angle are 25 degree to 60 degree.
To study for a long period of time discovery through contriver, when lipophilic-hydrophobic property fiber and sea line (hydrophilic lipophobic fibers) angle are between 25 degree to 45 degree, efficient separation efficiency is had to emulsified oil droplet, because the hydrophilic lipophobic fibers angle of lipophilic-hydrophobic property fiber and level is less, when emulsified oil droplet (oil-in-water) moves to the Nodes of two fibers, as shown in Figure 1, by the polarity reactive force of lipophilic-hydrophobic property fiber and hydrophilic lipophobic fibers, what oil droplet was subject to lipophilic-hydrophobic property fiber pulls power, and angle less time (a place in Fig. 1) oil droplet loading process is longer when horizontal displacement distance is equal, more easily separated, otherwise, if when angle is large (the b place in Fig. 1), oil droplet because of loading process short, and it is not easily separated.And when lipophilic-hydrophobic property fiber and sea line angle are between 45 degree to 60 degree, have good effect to the sharp separation of dispersed oil droplets, because level angle is large, during tangential movement, oil droplet more can rise separated along oleophylic fiber fast.
Described fibre conglomerates supplementary set layer is the Ω shape braid that lipophilic-hydrophobic property fiber and hydrophilic lipophobic fibers are arranged as that Ω shape then carries out weaving formation in advance separately, and wherein the quantitative proportion of lipophilic-hydrophobic property fiber and hydrophilic lipophobic fibers is 3:2 ~ 7:1.
This process adopts Ω shape braid more to lay particular emphasis on the adsorption of oleophilic drainage fiber, adopt Ω shape braiding point of contact many and be oleophylic fiber be horizontal bellows-shaped along waste water flow direction, to the effect that special fine oil droplets has water conservancy diversion to draw and adsorb, and move to convex top place can play oil droplet build up the effect of growing up, and then the more micro-oil droplet gone out in saliva is caught separation, reach the effect of degree of depth oil removing, as shown in Figure 2.
What described ripple idetified separation layer adopted is lipophilicity material, and wherein the spacing of waved plate is 5 ~ 25mm, and crest place has the circular hole of diameter 5 ~ 10mm, and the spacing between described circular hole is 50 ~ 300mm.Lipophilicity material can make floating oil droplet in waved plate attachment flowing, forms oil droplet convergent point and floating upward quickly is separated to crest place.
Described fluid rectifier is the uniform perforate slab of a porous, and described hole is circular hole or square opening, and percentage of open area is more than or equal to 60%.
Described X-shaped fiber braiding layer is 1 piece or polylith, is full of the cross section of whole fluid flowing.
In described X-shaped braid, the spacing a of adjacent two hydrophilic lipophobic fibers is 1 ~ 3 times of the spacing b of adjacent two lipophilic-hydrophobic property fibers.Because oil-in-water content is less, therefore the more probability that it catches oil droplet of ratio that account for of lipophilic fiber are also larger, again because the oil droplet of lower aq is attached on water droplet with particulate, therefore ratio control effect 1 ~ 3 times time is best, efficiency during more than 3 times has no and significantly improves, then the words cost increasing lipophilic fiber ratio is larger and meaningless.
Beneficial effect of the present invention is, this device is by uniform fluid distribution, lipophilic-hydrophobic property fiber and hydrophilic lipophobic fibers carry out weaving with various combination form, play breakdown of emulsion, coalescent and oil droplet floating upward quickly centrifugation, and be separated combination targetedly for the characteristic containing micro-oil droplet, there is the efficient and feature of low consumption, be applicable to the sewage treatment process containing lower concentration sump oil of different field.
Accompanying drawing explanation
Fig. 1 is break milk separation principle schematic;
Fig. 2 is the degree of depth oil removing schematic diagram of Ω shape braid;
Fig. 3 is the structural representation of X-shaped braid;
Fig. 4 is the separation schematic diagram of oil droplet on X-shaped braid;
Fig. 5 (a) oleophilic drainage fiber and hydrophilic oleophobic fibers form the first braiding process schematic of Ω shape braid;
Fig. 5 (b) is the degree of depth braiding process schematic that oleophilic drainage fiber and hydrophilic oleophobic fibers form Ω shape braid;
Fig. 6 is the apparatus structure schematic diagram of the degree of depth oil removing be applicable to containing lower concentration sump oil waste water.Nomenclature:
1 housing; 2 oily(waste)water imports; 3 fluid rectifiers;
4 X-shaped braids; 5 ripple idetified separation layers; 6 oil bags;
7 oil phase outlets; 8 liquid level meter; 9 purification aqueous phase outlets; 10 Ω shape braids.
Embodiment
Below in conjunction with drawings and Examples, the present invention is further described.
Embodiment 1
On the offshore platform of certain oil company's Oil extraction, have employed the method and the device that are applicable to contain the waste water advanced oil removing of lower concentration sump oil of the present invention, carry out oil removing to its factory effluent after sedimentation, eddy flow, dissolved air flotation, the sewage after oil removing reaches row sea after emission standard.
The structural representation of said apparatus as shown in Figure 6, comprises housing 1, oily(waste)water import 2, fluid rectifier 3, X-shaped braid 4 (fibre conglomerates separating layer), ripple idetified separation layer 5, Ω shape braid 10 (fibre conglomerates supplementary set layer), oil bag 6, oil phase outlet 7 and purification aqueous phase outlet 9.Oily(waste)water import 2 is at the upper one end of housing 1, and oil bag 6 is at the top the other end of housing 1, and oil bag 6 has liquid level meter 8, and oil phase outlet 7 is on the top of oil bag 6.The outlet of purification aqueous phase is 9 in the bottom of housing 1, relative with the oil bag 6 on housing 1 top or slightly arrange to deviation.Fluid rectifier 3, X-shaped braid 4, ripple idetified separation layer 5, Ω shape braid 10 are positioned at the inside of housing 1 and conjointly do not arrange mutually successively, wherein, fluid rectifier 3 is 30 ~ 80% of fluid cross-sectional flow area near the area of oily(waste)water import 2, Ω shape braid 10 and is in the bottom of fluid flow section.What ripple idetified separation layer 5 adopted is lipophilicity material, and wherein the spacing of waved plate is 5 ~ 25mm, and crest place has the circular hole of diameter 5 ~ 10mm, and the spacing between circular hole is 50 ~ 300mm.
Housing 1 in Fig. 6 of the present embodiment is horizontal circular tank, can also be horizontal rectangular parallelepiped tank.
The structural representation of X-shaped braid 4 as shown in Figure 3, wherein lipophilic-hydrophobic property fiber and horizontal angle can be 25 degree to 60 degree, Fig. 1 is the break milk separation principle schematic of fluid on X-shaped braid 4, and Fig. 4 is the separation schematic diagram of oil droplet on X-shaped braid 4.
Fig. 2 is the degree of depth oil removing schematic diagram of Ω shape braid, the first braiding process schematic of Fig. 5 (a) oleophilic drainage fiber and hydrophilic oleophobic fibers formation Ω shape braid, Fig. 5 (b) are the degree of depth braiding process schematic that oleophilic drainage fiber and hydrophilic oleophobic fibers form Ω shape braid,, wherein the quantitative proportion of oleophilic drainage fiber and hydrophilic oleophobic fibers is 3:2 ~ 7:1.
Use said apparatus to carry out degree of depth oil removing to the waste water containing lower concentration sump oil, its concrete operation and effect are described below:
The operational condition of this extra large oily platform production waste: working pressure: 1psig; Service temperature 60 ~ 90 DEG C, sewage with oil 25 ~ 50mg/L, 1 ~ 15 μm.
Require index: after oil removing, Oil in Sewage Water content is not more than 10mg/L.
Scheme Choice: in this programme, production waste oleaginousness is lower, and the initial stage have passed through sedimentation, eddy flow and dissolved air flotation, therefore in waste water, sump oil is scattered in waste water mainly with molecule form greatly, need stablize because of export requirement oil-contg and be not more than 10mg/L, therefore the combined method adopting rectification, the separation of X-shaped fiber braiding layer, ripple idetified separation, Ω shape fibrage layer depth to be separated processes, consider the problem that there is oil in water emulsion in waste water, therefore X-shaped fiber braiding layer adopts two-part, the fiber spacing of first paragraph X-shaped fiber braiding layer is than being a:b=2 (as shown in Figure 3, the spacing of adjacent two hydrophilic lipophobic fibers is a, and the spacing of adjacent two lipophilic-hydrophobic property fibers is b; lipophilic-hydrophobic property fiber and horizontal angle), efficient, the fast repairing that are applicable to little oil droplet gather the breakdown of emulsion of knot and emulsified oil droplet; The fiber spacing ratio of second segment X-shaped fiber braiding layer is a:b=1.5, the floating upward quickly being applicable to little oil droplet is separated; Consider that export requirement oil-contg is very low, therefore the quantitative proportion of Ω shape fiber braiding layer oleophilic drainage and hydrophilic oleophobic fibers is 4:1, and the oil droplet supplementary set being applicable to denier in waste water is separated.
Interpretation of result: treated water outlet oil-contg is 2 ~ 6mg/L, the stable separation requirement being less than 10mg/L, inlet and outlet pressure reduces to 0.01MPa, and energy consumption is lower.
Embodiment 2
Certain petro-chemical corporation's sewage from oil refinery treatment plant sewage adopts a kind of equipment be applicable to containing the waste water advanced oil removing of lower concentration sump oil of the present invention, carries out oil removing, reach the requirement into biochemical treatment after oil removing to it through the pretreated waste water of sedimentation.
Other conditions are with embodiment 1, and distinct portions is concrete operation and effect as described below:
The operational condition of this sewage treatment plant waste water after gravity settling pre-treatment: working pressure: 0.2MPa; Service temperature 40 ~ 60 DEG C, sewage with oil 80 ~ 100mg/L.
Require index: after oil removing, Oil in Sewage Water content is not more than 25mg/L.
Scheme Choice: in this programme, the sewage initial stage have passed through simply settlement separate, therefore in waste water oil droplet greatly mainly with small, comparatively small-particle form is scattered in waste water, there is a small amount of emulsified oil droplet, export requirement oil-contg is not more than 25mg/L, therefore rectification is adopted, X-shaped fiber braiding layer is separated, ripple idetified separation, the combined method that Ω shape fibrage layer depth is separated processes, consider to there is a small amount of oil in water emulsion in waste water, and in waste water oil droplet greatly mainly with small, comparatively small-particle form is scattered in waste water, therefore X-shaped fiber braiding layer adopts one-part form, fiber spacing is than being a:b=2.5, °, efficient, the fast repairing that are applicable to small, less oil droplet gather the breakdown of emulsion of knot and a small amount of emulsified oil droplet, and can meet the floating upward quickly separation requirement after little oil droplet coalescence, consider that wastewater outlet enters life process, therefore need the stable requirement meeting oil-contg and be less than 25mg/L, therefore the ratio of Ω shape fiber braiding layer oleophilic drainage and hydrophilic oleophobic fibers is 3:1, and the oil droplet supplementary set being applicable to trace in waste water is separated.
Interpretation of result: treated water outlet oil-contg is 14 ~ 20mg/L, the stable separation requirement being less than 25mg/L, inlet and outlet pressure reduces to 0.008MPa, and energy consumption is lower.
Be only preferred embodiment of the present invention in sum, be not used for limiting practical range of the present invention.And all equivalences done according to the content of the present patent application the scope of the claims change and modify, and all should be technology category of the present invention.

Claims (8)

1. one kind is carried out the device of degree of depth oil removing to the waste water containing lower concentration sump oil, it is characterized in that, described device comprises housing, oily(waste)water import, fluid rectifier, fibre conglomerates separating layer, ripple idetified separation layer, fibre conglomerates supplementary set layer, oil bag, the outlet of purification aqueous phase;
Wherein, described oily(waste)water import is at the upper one end of described housing, and described oil wraps in the top the other end of described housing; Described oil bag has liquid level meter, and the top of described oil bag is provided with oil phase outlet; Described purification aqueous phase outlet is positioned at the bottom of described housing, and the outlet of this purification aqueous phase is wrapped relative with described oil or slightly arranges to deviation; Fluid rectifier, fibre conglomerates separating layer, ripple idetified separation layer, fibre conglomerates supplementary set layer are positioned at the inside of described housing and conjointly do not arrange mutually successively, wherein, described fluid rectifier is near described oily(waste)water import, and the area of described fibre conglomerates supplementary set layer is 30 ~ 80% of fluid cross-sectional flow area and is in the bottom of described fluid flow section.
2. device as claimed in claim 1, it is characterized in that, described housing is horizontal circular tank, or horizontal rectangular parallelepiped tank.
3. device as claimed in claim 1, is characterized in that, described fibre conglomerates separating layer is the X-shaped braid that oleophilic drainage fiber and hydrophilic oleophobic fibers weaving are formed, and wherein lipophilic-hydrophobic property fiber and horizontal angle are 25 degree to 60 degree.
4. device as claimed in claim 1, it is characterized in that, described fibre conglomerates supplementary set layer is the Ω shape braid that lipophilic-hydrophobic property fiber and hydrophilic lipophobic fibers are arranged as that Ω shape then carries out weaving formation in advance separately, and wherein the quantitative proportion of lipophilic-hydrophobic property fiber and hydrophilic lipophobic fibers is 3:2 ~ 7:1.
5. device as claimed in claim 1, is characterized in that, what described ripple idetified separation layer adopted is lipophilicity material, and wherein the spacing of waved plate is 5 ~ 25mm, and crest place has the circular hole of diameter 5 ~ 10mm, and the spacing between described circular hole is 50 ~ 300mm.
6. device as claimed in claim 1, is characterized in that, described fluid rectifier is the uniform perforate slab of a porous, and described hole is circular hole or square opening, and percentage of open area is more than or equal to 60%.
7. device as claimed in claim 3, it is characterized in that, described X-shaped fiber braiding layer is 1 piece or polylith, is full of the cross section of whole fluid flowing.
8. device as claimed in claim 3, it is characterized in that, in described X-shaped braid, the spacing a of adjacent two hydrophilic lipophobic fibers is 1 ~ 3 times of the spacing b of adjacent two lipophilic-hydrophobic property fibers.
CN201420256055.4U 2014-05-19 2014-05-19 A kind of device waste water containing lower concentration sump oil being carried out to degree of depth oil removing CN204079541U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420256055.4U CN204079541U (en) 2014-05-19 2014-05-19 A kind of device waste water containing lower concentration sump oil being carried out to degree of depth oil removing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201420256055.4U CN204079541U (en) 2014-05-19 2014-05-19 A kind of device waste water containing lower concentration sump oil being carried out to degree of depth oil removing

Publications (1)

Publication Number Publication Date
CN204079541U true CN204079541U (en) 2015-01-07

Family

ID=52172279

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201420256055.4U CN204079541U (en) 2014-05-19 2014-05-19 A kind of device waste water containing lower concentration sump oil being carried out to degree of depth oil removing

Country Status (1)

Country Link
CN (1) CN204079541U (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104944619A (en) * 2015-06-25 2015-09-30 华东理工大学 Method for degreasing electro-desalted sewage in heavy crude oil processing process
WO2015176196A1 (en) * 2014-05-19 2015-11-26 华东理工大学 Method and device for deep oil removal from wastewater containing low-concentration waste oil
CN108264024A (en) * 2018-02-12 2018-07-10 上海米素环保科技有限公司 The combined method and device of working solution deep dehydration a kind of legal system hydrogen peroxide suitable for anthraquinone
CN110078160A (en) * 2019-04-03 2019-08-02 华东理工大学 A kind of method and device thereof of the close and distant particle water combination coalescent deoiling of offshore oilfield production water

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015176196A1 (en) * 2014-05-19 2015-11-26 华东理工大学 Method and device for deep oil removal from wastewater containing low-concentration waste oil
CN104944619A (en) * 2015-06-25 2015-09-30 华东理工大学 Method for degreasing electro-desalted sewage in heavy crude oil processing process
CN108264024A (en) * 2018-02-12 2018-07-10 上海米素环保科技有限公司 The combined method and device of working solution deep dehydration a kind of legal system hydrogen peroxide suitable for anthraquinone
CN110078160A (en) * 2019-04-03 2019-08-02 华东理工大学 A kind of method and device thereof of the close and distant particle water combination coalescent deoiling of offshore oilfield production water

Similar Documents

Publication Publication Date Title
Santander et al. Modified jet flotation in oil (petroleum) emulsion/water separations
CN103723790B (en) Be applied to the efficient coarse separation equipment of alkyl plant
ES2612057T3 (en) Process and apparatus for separating adsorbent bubbles
CN102225812B (en) Membrane treatment process for oilfield reinjection water
AU2009344910B2 (en) Apparatus and method for separation of phases in a multiphase flow
CN108177273B (en) Continuous separation and enrichment device and method for micro-plastic
CN106660836A (en) Electrochemical treatment methods
US20130062272A1 (en) Device for Purifying Oily Wastewater
RU148902U1 (en) Mobile sewage treatment plant
CN100579917C (en) Three-phase cyclone separator and cleaning treatment system for oil-containing water
CN100572306C (en) Oil-contained waste water treatment system that a kind of saltiness is high and technology
CN202289697U (en) Water separation equipment
CN103706149B (en) The efficient separation equipment of modular combination
CN102807291B (en) Treatment method and equipment for oilfield produced water
JP5826068B2 (en) Accompanying water treatment method and treatment apparatus
CN103861329B (en) A kind of combined method and device being applicable to three phase separation
CN203411425U (en) Oil field fracturing flow-back liquid wastewater treatment equipment
CN102583617B (en) Isolation type multiphase balanced air floatation device
JP6309090B2 (en) Pressure levitation device
CN102553450B (en) Method for preventing split membrane bio-reactor (MBR) flat membrane pollution
CN201132782Y (en) Purification device for oil-contaminated water and purification system with the device
CN102225794B (en) Combined device and method for separating waste water and waste oil in kitchen garbage
CN103771652A (en) Treatment method for waste water from processing acid-containing crude oil
CN101195074B (en) Electromagnetism filtering and separating method for oil-water and device thereof
CN103922499B (en) A kind of heavy metal ions in wastewater eddy flow strengthening extraction method and device thereof

Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20150107

Termination date: 20190519