CN202072505U - Micro-nano gas floating separating device - Google Patents
Micro-nano gas floating separating device Download PDFInfo
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- CN202072505U CN202072505U CN2011201122421U CN201120112242U CN202072505U CN 202072505 U CN202072505 U CN 202072505U CN 2011201122421 U CN2011201122421 U CN 2011201122421U CN 201120112242 U CN201120112242 U CN 201120112242U CN 202072505 U CN202072505 U CN 202072505U
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Abstract
The utility model relates to a micro-nano gas floating separating device, which comprises a gas supply system (A), a micro-nano bubble generator (B), a micro-nano bubble releaser (C) and an air floating box separating system (D), wherein the gas supply system (A), the micro-nano bubble generator (B), the micro-nano bubble releaser (C) and the air floating box separating system (D) are sequentially communicated through pipelines, and the gas floating box separating system (D) is communicated with a water inlet of the micro-nano bubble generator (B) through a pipeline. The device can effectively remove dispersed oil with the oil drop diameter smaller than or equal to 10mum uniformly dispersed in the water, simultaneously, different air source types are utilized for realizing the oxidation desulphuration treatment or nitrogen gas adding and dissolved oxygen removing treatment of oil-containing sewage on the basis of improving the gas floating oil, and in addition, dirt generated in releaser seams can be automatically removed according to the water flow resistance, so the dirt can not be accumulated and blocked in the seams.
Description
Technical field:
The utility model belongs to water treatment field, particularly a kind of micro-nano gas floatation separation device.
Background technology:
Mode by producing bubble can be divided into following four kinds to air supporting method water purification: (1) dispersion air air supporting method: this method can be divided into two kinds of the broken gas method of rotor and micropore gas distribution methods.The former relies on the negative pressure that centrifugal force caused of high speed rotating rotor and air is sucked, and with the waste water that elevates fully mixed after, under the effect of the shearing force of water, gas is fine into microbubble and is spread in the water by broken; The latter makes air be divided into small bubbles by the aperture in poromerics or the shower nozzle to be distributed in the water.Shortcoming: the bubble diameter of generation is bigger, and bobble rise velocity is fast, and is relatively poor to smaller particles impurity in the separating liquid and its effect of loose wadding grain of easily being crashed through; (2) electrolysis-coagulation air supporting method: this law is that the multi-group electrode of alternate positive and negative is assigned in waste water, when when the direct current, produces electrolysis, between particulate polarization, electrophoresis, redox, electrolysate and the interaction between waste water etc.Shortcoming: current consumption is bigger, and metal wastage is big; (3) biology and chemical air supporting method: this method is to rely on the microorganism gas of being emitted in metabolic processes and the grain adhesion back of wadding a quilt with cotton to float to the water surface.Shortcoming: be subjected to the restriction of various conditions (as temperature, wastewater property, medicament etc.), the reliable and stable degree of processing is poor, uses less; (4) dissolved air air supporting method: this method can be divided into two kinds of vacuum type air supporting method and pressure air-dissolving air-float methods again.The former utilizes the method vacuumize to force dissolved air under normal pressure, discharges with the form of microbubble, and air feed is floating to be used; The latter is under the situation of pressurization, and force air is dissolved in the water, and decompression suddenly disengages dissolved gases from water then, short its come-up with the form adhesion wadding grain of microbubble.
The utility model content:
In order to solve the problem that exists in the background technology, the utility model provides a kind of micro-nano gas floatation separation device, this device has solved mainly that traditional airfloat equipment generation bubble particles in service is big, dosing is of a great variety, must use flocculation agent just can reach the problem of greasy filth come-up, the micro-nano bubble producer can replace aerator and the air-dissolving apparatus in the existing airfloat equipment and can be applicable to the transformation of initial settlement jar, by increasing the deoiling effect that the micro-nano bubble producer improves jar; The particle diameter of this novel generation bubble is at 10um-300nm, and dissolved air water is milk shape oyster white, need not to add emulsion splitter, just can effectively remove to be dispersed in oil droplet size in the water and to equal dispersed oil less than 10um.Pass through the different source of the gas kind of use simultaneously on the basis of improving the air supporting oil slick, realize the oxidation of oily(waste)water is removed sulphuring treatment or adds the processing of nitrogen removal dissolved oxygen; Micro-nano bubble reliever slit can be removed the dirt that produces in the slit automatically according to the flow resistance size.Make dirt can't in slit, pile up, stop up.Thereby solved the problem of air-float water treatment facility because of the normal operation of micro-nano bubble reliever congestion affects airfloat equipment.
Micro-nano air supporting can be used coagulating agent separately in that oily(waste)water is in service, the small flco in the sewage by the micro-nano bubble holder in the micro-nano airfloat equipment to come-up.Micro-nano air supporting is in service can select suitable source of the gas according to the different quality situation.Sewage mixture of oxygen or ozone gas source increase micro-nano air supporting oxidation effectiveness, and sewage mixing nitrogen source of the gas increases micro-nano air supporting and removes the oxygen in water effect.
The technical scheme that the utility model adopted is: this micro-nano gas floatation separation device comprises airing system, the micro-nano bubble producer, the micro-nano bubble reliever, the air buoyancy tank separation system, and airing system, the micro-nano bubble producer, micro-nano bubble reliever and air buoyancy tank separation system are connected successively by pipeline, the air buoyancy tank separation system is connected by pipeline with the water-in of micro-nano bubble producer, described micro-nano bubble producer comprises water inlet pipe and rising pipe, one end of water inlet pipe is connected with topping-up pump, the topping-up pump the other end is connected with the dissolving top seal by pipeline, pipeline is provided with magnetic flow meter, the dissolving top seal is communicated with inlet pipe, inlet pipe connects airing system, the magnetic valve that inlet pipe is provided with, magnetic valve is by being positioned at the controlling box programmable controller controls, be provided with ejector nozzle in the dissolving, the jet Hilton, the liquid level ball float, the dissolved air water absorption tube, ejector nozzle is connected with pipeline, the ejector nozzle below is provided with the jet Hilton with its corresponding position, be the gas-liquid chamber between ejector nozzle and the jet Hilton, the dissolved air water absorption tube extends to outside the dissolving and is connected with rising pipe, and rising pipe is connected with the water inlet pipe of micro-nano bubble reliever; Described micro-nano bubble reliever comprises water inlet pipe and housing, housing sidewall top seal connection is fixed with water inlet pipe, be provided with reducing hole and pore chamber in the water inlet pipe, be provided with pipe in the housing, be evenly equipped with the supercharging diffusion hole on the pipe, be provided with setter in the pipe, the setter upper end fixes with housing, the fixing porose box of pipe bottom face, between setter and the hole box parallel slits is arranged, the hole box is distributed with posticum vertically, is provided with auxilliary energy dissipating chamber between hole box and the housing bottom, housing bottom sealing connection is fixed with rising pipe, and rising pipe is connected with the air buoyancy tank separation system.
The beneficial effect that the utility model had is: the utility model has solved mainly that traditional airfloat equipment generation bubble particles in service is big, and dosing is of a great variety, must use flocculation agent just can reach the effect of greasy filth come-up.Micro-nano air supporting can be used coagulating agent separately in that oily(waste)water is in service, the small flco in the sewage by the micro-nano bubble holder in the micro-nano airfloat equipment to come-up.Micro-nano air supporting is in service can select suitable source of the gas according to the different quality situation.Sewage mixture of oxygen or ozone gas source increase micro-nano air supporting oxidation effectiveness, and sewage mixing nitrogen source of the gas increases micro-nano air supporting and removes the oxygen in water effect.A. under the pressurization situation, the solubleness of air is big, and the number of bubbles of the floating usefulness of air feed can obtain satisfying significantly, guarantees air flotation effect.B. the gas that dissolves in discharges through sudden pressure reduction, and the bubble size of generation is little, epigranular, and intensity is big, and come-up is stable, and is little to the liquid disturbance, therefore, is specially adapted to the solid, liquid of loose wadding grain, fine particle is separated.
C. technological process and equipment are fairly simple, management, easy to maintenance, energy-conservation.
Description of drawings:
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is a micro-nano bubble generator architecture synoptic diagram of the present utility model;
Fig. 3 is a micro-nano bubble reliever structural representation of the present utility model;
Fig. 4 is a Controlling System schematic circuit of the present utility model.
Among the figure: A-airing system, B-micro-nano bubble producer, C-micro-nano bubble reliever, D-air buoyancy tank separation system, 1-bubble generation rising pipe, the 2-medicine washes out mouth, 3-discharge pressure transmitter, 4-intake pressure transmitter, 5-dissolving, the 6-magnetic flow meter, the 7-topping-up pump, the 8-medicine is washed import, 9-bubble generation water inlet pipe, 10-vacuum breaker, 11-ejector nozzle, 12-jet Hilton, 13-liquid level ball float, 14-gas-liquid chamber, 15-dissolved air water absorption tube, 16-inlet pipe, 17-magnetic valve, the 18-controlling box, 19-base, 20-pipeline, the 01-water inlet pipe, 02-housing, 03-hole box, the 04-rising pipe, 05-setter, 06-reducing hole, the 07-pore chamber, 08-parallel slits, 09-posticum, 010-assists the energy dissipating chamber, 011-supercharging diffusion hole, 012-pipe, PLC-programmable controller, the QF-air switch, the 1QF-air switch, 2QF-air switch, VVVF-frequency transformer, the KM-alternating current contactor, the DP-switch power supply, ST-connecting terminal block, POD-touch-screen, PLC A/D-analog module, DL1-adds gaseity, and DL2-hydraulic pressure is reported to the police, the DL3-air pressure alarm, the KA1-rly., KA2-rly. and GL-signal are from every device.
Embodiment:
Below in conjunction with accompanying drawing the utility model is further specified: as shown in the drawing, oily(waste)water at first enters air buoyancy tank separation system D from the air supporting water inlet after adding coagulating agent, the small flco that produces after the dosing produces the nano bubble holder to come-up through micro-nano bubble producer B, micro-nano bubble reliever C, thereby reach separating effect, handle the back water purification and enter subordinate by the air supporting water outlet.Wherein airing system uses air, oxygen, ozone or nitrogen gas preparing according to water quality.
Described micro-nano bubble producer comprises bubble generation water inlet pipe 9 and bubble generation rising pipe 1, bubble generation water inlet pipe 9 is connected with air buoyancy tank separation system D, the other end of bubble generation water inlet pipe 9 and topping-up pump 7 add rubber cushion by flange and are tightly connected, topping-up pump 7 the other ends are fixedlyed connected with dissolving 5 top seals by pipeline 20, pipeline 20 is provided with magnetic flow meter 6, dissolving 5 top seals are communicated with inlet pipe 16, inlet pipe 16 is connected with airing system A, magnetic valve 17 and reducing valve that inlet pipe 16 is provided with, magnetic valve 17 is by being positioned at controlling box 18 programmable controller PLC control, be provided with ejector nozzle 11 in the dissolving 5, jet Hilton 12, liquid level ball float 13, dissolved air water absorption tube 15, ejector nozzle 11 and pipeline 20 are fixedlyed connected by flange, ejector nozzle 11 belows and its corresponding position are provided with jet Hilton 12, dissolving 5 bottoms are fixed in by support in jet Hilton 12, be gas-liquid chamber 14 between ejector nozzle 11 and the jet Hilton 12, gas-liquid is mixed at 14 places, gas-liquid chamber, dissolved air water absorption tube 15 extends to outside the dissolving 5 and is connected with bubble generation rising pipe 1, dissolved air water absorption tube 15 bottom ports keep the 10-15cm distance with jar end, and top is welding with jar surface.Bubble generation rising pipe 1 is connected with the water inlet pipe 01 of micro-nano bubble reliever C.
Bubble generation rising pipe 1 is provided with medicine and washes out mouthfuls 2 and discharge pressure transmitter 3, and bubble generation water inlet pipe 9 is provided with medicine and washes import 8, medicine wash out mouthfuls 2 and medicine wash the cleaning that import 8 is used for greasy dirt and dirty class material after the integral device long-time running.
Be provided with vacuum breaker 10 and intake pressure transmitter 4 on the pipeline 20 successively, intake pressure transmitter 4, discharge pressure transmitter 3 are convenient to the running status of monitoring equipment, and the setting of vacuum breaker 10 prevents that the refluence situation of water behind the equipment downtime from taking place.
Dissolving 5 and topping-up pump 7 are separately fixed on the base 19.
Micro-nano bubble producer B operational process is: from the water source of air buoyancy tank separation system D at first by topping-up pump 7 superchargings through pipeline 20, magnetic flow meter 6 to dissolving 5, gas is entered in the dissolving 5 by inlet pipe 16, the water source advances dissolving 5 and at first passes through ejector nozzle 11 via gas-liquid chamber 14, the band air water enters jet Hilton 12, jet Hilton 12 water completely are spilled in the jar, dissolved air water is outside dissolved air water absorption tube 15 ejection jars, wash out mouth 2 to bubble generation rising pipe 1 via discharge pressure transmitter 3, medicine, enter micro-nano bubble reliever C.The consumption situation of while liquid level ball float 13 feedback gas, switch air inlet magnetic valve 17 according to demand.Source of the gas in the mixing liquid can use air, oxygen, ozone and nitrogen etc. according to processing requirement, and oxygen is used for the airfloat equipment oil slick and removes water impurity.Oxygen, ozone are on the basis of air supporting treatment effect, and the reducing substances that is used for oxidizing water can be used for removing the sulfide in the oilfield sewage, and sulfur elimination adds in the minimizing technology.The nitrogen source of the gas plays removal effect at the dissolved oxygen in the oilfield sewage on the basis of air supporting treatment effect, oxygen scavenger adds in the minimizing technology.
Mixing effect principle in the dissolving 5: with the power water of quantitative pressurized water as ejector, current spray from ejector nozzle 11 with the high speed turbulent flow bundle of 30-40 meter per second, pass gas-liquid chamber 14, form stable negative pressure, the gas at suction tank top in gas-liquid chamber 14.Air-water mixture is violent turbulent fluctuation, bump, shearing in jet Hilton 12, forms emulsified state, makes gas soluble in water.Make gas soluble in water.According to the volume of tank deck gas, in time replenish the required gas of molten gas.Gas-liquid chamber 14 quantitatively sucks tank deck gas, and according to the volume of tank deck gas, equipment can in time replenish the needed gas of molten gas.Do not exist conventional dissolving to suck excessive gas and the situation of emitting unnecessary gas.
Described micro-nano bubble reliever comprises water inlet pipe 01 and housing 02, housing 02 side wall upper part sealing and fixing has water inlet pipe 01, housing 02 is connected with water inlet pipe 01, water inlet pipe 01 is connected with the bubble generation rising pipe 1 of micro-nano bubble producer B, be provided with reducing hole 06 and pore chamber 07 in the water inlet pipe 01, the aperture in reducing hole 06 is much smaller than the aperture of pore chamber 07, be provided with pipe 012 in the housing 02, be evenly equipped with supercharging diffusion hole 011 on the pipe 012, be provided with setter 05 in the pipe 012, setter 05 upper end and housing 02 fix and extend to outside the housing 02, manage the fixing porose box 03 of 013 bottom face, between setter 05 and the hole box 03 parallel slits 08 is arranged, hole box 03 is distributed with posticum 09 vertically, be provided with auxilliary energy dissipating chamber 010 between hole box 03 and housing 02 bottom, the sealing connection of housing 02 bottom is fixed with rising pipe 04, and rising pipe 04 communicates with auxilliary energy dissipating chamber 010.The other end of rising pipe 04 is connected with air buoyancy tank separation system D.
During actual the use, when the band pressure solution air water from micro-nano bubble producer B entered reducing hole 06 by water inlet pipe 01, flow section dwindled suddenly, and when entering pore chamber 07 immediately, section is sudden enlargement again.Current are sharp impacts in pore chamber 07, forms eddy current.Enter the cavity of pipe in 013 via supercharging diffusion hole 011, when changing parallel slits 08 rapidly over to and radially spreading rapidly, flow section shrinks once more, and fluidised form drastic change, turbulent fluctuation are more violent.In said process, most air molecules discharge from water, and become greatly ultramicro air bubble step by step in molecular diffusion and turbulent diffusion.When gas-vapor mix liquid enters auxilliary usefulness chamber 010 by posticum 09, flow section is sudden enlargement again, and the residue static energy of dissolved air water continues in this conversion, and supersaturated air almost all discharges, ultramicro air bubble liquid flows out by rising pipe 04 simultaneously, and gas releasing process finishes.The gas releasing process of dissolved air water is finished in the micro-nano bubble reliever, gas releasing process be at dissolved air water through shrinking repeatedly, diffusion, bump, anti-stream, extruding is finished in radiation and the eddy flow, whole process is lasted less than 0.2S.
For the ease of operation and the management of field staff to equipment, by touch-screen demonstration, programmable controller PLC time variable control, realization is adjusted monitor showing, data logging, warning and the operation of the running status of micro-nano bubble generator apparatus, employing automatization control of the present invention.
Controlling System by PLC Communication module, air switch QF, air switch 1QF, air switch 2QF, frequency transformer VVVF, alternating current contactor KM, switch power supply DP, connecting terminal block ST, programmable controller PLC, touch-screen POD, analog module PLC A/D, add gaseity DL1, hydraulic pressure warning DL2, air pressure alarm DL3, relay K A1, relay K A2 and signal from forming every device GL.
One, Controlling System to various transmitter inpuies such as intake pressure CH1, produce water pressure CH2, air pressure CH3, flooding velocity CH4 detect, all kinds fault is reported to the police.And possess the preservation and the processing power of real time data and historical data, dynamic simulation, tabulation are carried out in technical process.To the permanent preservation of general data.And the dynamic color picture directly perceived that shows whole process flow or local link dynamically shows the running status of each parts of technical process.
Controlling System can be by the network savvy of PLC Communication module realization with control microcomputer.Make things convenient for the running condition of user's remote inquiry equipment.
Two, real-time technology controlling and process:
1, the water yield detects; According to the input of magnetic flow meter 6, be uploaded to touch-screen POD through programmable controller PLC and show.
2, pressure-controlling; By the input that on-the-spot intake pressure transmitter 4, discharge pressure transmitter 3 are measured, adjust topping-up pump 7 pressure through programmable controller PLC control of conversion device VVVF.
3, liquid level control; By the input of programmable controller PLC, show and 17 actions of control magnetic valve according to liquid level ball float 13.
Claims (1)
1. micro-nano gas floatation separation device, comprise airing system (A), micro-nano bubble producer (B), micro-nano bubble reliever (C), air buoyancy tank separation system (D), and airing system (A), micro-nano bubble producer (B), micro-nano bubble reliever (C) and air buoyancy tank separation system (D) are connected successively by pipeline, air buoyancy tank separation system (D) is connected by pipeline with the bubble generation water inlet pipe (9) of micro-nano bubble producer (B), it is characterized in that: described micro-nano bubble producer (B) comprises bubble generation water inlet pipe (9) and bubble generation rising pipe (1), one end of bubble generation water inlet pipe (9) is connected with topping-up pump (7), topping-up pump (7) the other end is connected with dissolving (5) top seal by pipeline (20), pipeline (20) is provided with magnetic flow meter (6), dissolving (5) top seal is communicated with inlet pipe (16), inlet pipe (16) connects airing system (A), the magnetic valve (17) that inlet pipe (16) is provided with, magnetic valve (17) is controlled by the programmable controller that is positioned at controlling box (18) (PLC), be provided with ejector nozzle (11) in the dissolving (5), jet Hilton (12), liquid level ball float (13), dissolved air water absorption tube (15), ejector nozzle (11) is connected with pipeline (20), ejector nozzle (11) below is provided with jet Hilton (12) with its corresponding position, be gas-liquid chamber (14) between ejector nozzle (11) and jet Hilton (12), dissolved air water absorption tube (15) extends to outside the dissolving (5) and is connected with bubble generation rising pipe (1), and bubble generation rising pipe (1) is connected with the water inlet pipe (01) of micro-nano bubble reliever (C); Described micro-nano bubble reliever (C) comprises water inlet pipe (01) and housing (02), housing (02) side wall upper part sealing connection is fixed with water inlet pipe (01), be provided with reducing hole (06) and pore chamber (07) in the water inlet pipe (01), be provided with pipe (012) in the housing (02), be evenly equipped with supercharging diffusion hole (011) on the pipe (012), be provided with setter (05) in the pipe (012), setter (05) upper end fixes with housing (02), the fixing porose box (03) of pipe (012) bottom face, between setter (05) and the hole box (03) parallel slits (08) is arranged, hole box (03) is distributed with posticum (09) vertically, be provided with auxilliary energy dissipating chamber (010) between hole box (03) and housing (02) bottom, the sealing connection of housing (02) bottom is fixed with rising pipe (04), and rising pipe (04) is connected with air buoyancy tank separation system (D).
2, micro-nano gas floatation separation device according to claim 1 is characterized in that: bubble generation rising pipe (1) is provided with medicine and washes out mouthful (2) and a discharge pressure transmitter (3), and bubble generation water inlet pipe (9) is provided with medicine and washes import (8).
3, micro-nano gas floatation separation device according to claim 2 is characterized in that: be provided with vacuum breaker (10) and intake pressure transmitter (4) on the pipeline (20) successively.
4, micro-nano gas floatation separation device according to claim 3 is characterized in that: dissolving (5) and topping-up pump (7) are separately fixed on the base (19).
5, micro-nano gas floatation separation device according to claim 4 is characterized in that: hole box (03) bottom is a cone surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201122421U CN202072505U (en) | 2011-04-15 | 2011-04-15 | Micro-nano gas floating separating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201122421U CN202072505U (en) | 2011-04-15 | 2011-04-15 | Micro-nano gas floating separating device |
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| Publication Number | Publication Date |
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| CN202072505U true CN202072505U (en) | 2011-12-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011201122421U Expired - Fee Related CN202072505U (en) | 2011-04-15 | 2011-04-15 | Micro-nano gas floating separating device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102398988A (en) * | 2011-12-31 | 2012-04-04 | 福州威龙环保技术有限公司 | Sludge reducing high-efficiency biochemical treatment device |
| CN102531155A (en) * | 2011-12-31 | 2012-07-04 | 福州威龙环保技术有限公司 | High dissolved oxygen generating device and application thereof |
| CN105540888A (en) * | 2016-02-16 | 2016-05-04 | 太仓百诺纳米科技有限公司 | Pure oxygen nanobuble device |
| CN106186145A (en) * | 2016-09-26 | 2016-12-07 | 大庆市海油庆石油科技有限公司 | Sedimentation pot type is from rinsing air supporting |
| CN110550719A (en) * | 2019-10-08 | 2019-12-10 | 上海亮仓能源科技有限公司 | Aeration head of hydrogen bath machine |
| CN116282361A (en) * | 2023-04-27 | 2023-06-23 | 柳州钢铁股份有限公司 | Full-flow state monitoring method for jet air-float oil remover |
-
2011
- 2011-04-15 CN CN2011201122421U patent/CN202072505U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102398988A (en) * | 2011-12-31 | 2012-04-04 | 福州威龙环保技术有限公司 | Sludge reducing high-efficiency biochemical treatment device |
| CN102531155A (en) * | 2011-12-31 | 2012-07-04 | 福州威龙环保技术有限公司 | High dissolved oxygen generating device and application thereof |
| CN102398988B (en) * | 2011-12-31 | 2016-08-03 | 福州威龙环保技术有限公司 | Sludge reducing high-efficiency biochemical treatment device |
| CN105540888A (en) * | 2016-02-16 | 2016-05-04 | 太仓百诺纳米科技有限公司 | Pure oxygen nanobuble device |
| CN106186145A (en) * | 2016-09-26 | 2016-12-07 | 大庆市海油庆石油科技有限公司 | Sedimentation pot type is from rinsing air supporting |
| CN106186145B (en) * | 2016-09-26 | 2022-11-04 | 大庆市海油庆石油科技有限公司 | Settling tank type automatic flushing dissolved air flotation device |
| CN110550719A (en) * | 2019-10-08 | 2019-12-10 | 上海亮仓能源科技有限公司 | Aeration head of hydrogen bath machine |
| CN116282361A (en) * | 2023-04-27 | 2023-06-23 | 柳州钢铁股份有限公司 | Full-flow state monitoring method for jet air-float oil remover |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111214 Termination date: 20160415 |
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| CF01 | Termination of patent right due to non-payment of annual fee |