CN103691082A - Colloid-inhibiting inert foam preparation device and process for preventing coal spontaneous combustion - Google Patents
Colloid-inhibiting inert foam preparation device and process for preventing coal spontaneous combustion Download PDFInfo
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- CN103691082A CN103691082A CN201310704991.7A CN201310704991A CN103691082A CN 103691082 A CN103691082 A CN 103691082A CN 201310704991 A CN201310704991 A CN 201310704991A CN 103691082 A CN103691082 A CN 103691082A
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Abstract
The invention discloses a colloid-inhibiting inert foam preparation device for preventing coal spontaneous combustion. The colloid-inhibiting inert foam preparation device comprises a jet-flow proportional mixer device, a primary foaming device, a secondary foaming device and a gas conveying device which are connected in sequence; the jet-flow proportional mixer device comprises a jet-flow proportional mixer (a jet-flow mixer imitates a jet device on fire fighting, so that the dimension of each part of the jet-flow proportional mixer is obtained by certain computation according to practical needs, and then each part of the jet-flow proportional mixer is designed and customized), a high-pressure water inlet connected with a spray nozzle of the jet-flow proportional mixer, and a colloid-inhibiting liquid inlet connected with a liquid absorbing chamber of the jet-flow proportional mixer, wherein an output port of the jet-flow proportional mixer is connected with a liquid inlet of the primary foaming device. According to the colloid-inhibiting inert foam preparation device and the process for preventing the coal spontaneous combustion, pressure water and pressure nitrogen gas are taken as conveying power, so that the colloid-inhibiting inert foam preparation device and process are safe and reliable.
Description
Technical field
The present invention relates to coal spontaneous combustion preventing and extinguishing fire technology field, goaf, relate in particular to a kind of lazy bubble preparation facilities of colloid resistanceization and technique thereof of preventing and treating coal spontaneous combustion.
Background technology
The whole nation has in colliery 56% mine to have the danger of spontaneous fire, cause every year directly and nearly 10,000,000,000 yuan of indirect economic loss.Existing preventing and extinguishing fire technology is all to realize anti-fire extinguishing by reducing or reduce mixture of coal with oxygen, larger for resistance, inerting, the leak stopping difficulty in the comparatively unobstructed goaf of leaking out.Especially combine the employing of adopting with Longwall top coal caving technology, pit mining intensity strengthens, ventilating system relative complex, and goaf scope constantly expands, and goaf is to be the most also the region that freely burning fire the most often occurs, the frequency of mine spontaneous combustion of coal and the difficulty of control have been increased greatly.Goaf drop has a large amount of something lost coals; There is the oxygen supply of continuously leaking out; Possess good something lost coal accumulation of heat environment, and goaf area is large, spontaneous combustion " three bands " is dynamic mobile, loses that coal high temperature range is large, high temperature dot is hidden with the propelling of coal-face, once it is large-area often that spontaneous combustion occurs, fire extinguishing difficulty is very large.
The Main Means of control coal spontaneous combustion is at present cooling (as water filling, slip casting, glue injection body, note three-phase froth etc.) and goaf inerting (as note nitrogen, carbon dioxide injection etc.), although positive role has been brought into play in the anti-fire extinguishing of these means in the low bit space in Close Quarters Goaf, colliery, for the high bit space in remote goaf, catch fire and can't prove effective completely.Because coal spontaneous combustion mostly occurs in goaf, the area in goaf is larger, burning things which may cause a fire disaster point is more hidden and be difficult to determine its particular location, conventional fireproofing extinguishing materials is difficult to carry out large area filling, and do not possess good accumulation, undesirable to region coal spontaneous combustion fire effects such as preventing and controlling face goafs.So can make goaf fall oxygen, inerting, leak stopping in the urgent need to research, resistance formed material can be taken to remote hidden region resistanceization spontaneous combustion of remaining coal, and easily pile up and arrive fire proofing material, equipment and the technique for applying of the high bit space in goaf.
Summary of the invention
In order to solve existing technical problem in background technology, the present invention proposes a kind of lazy bubble preparation facilities of colloid resistanceization and technique thereof of preventing and treating coal spontaneous combustion, using press water and pressure nitrogen gas as transmitting power, safe and reliable.
Technical solution of the present invention is: the lazy bubble preparation facilities of colloid resistanceization of control coal spontaneous combustion, is characterized in that: comprise successively connected jet-flow proportioning mixer apparatus, one-level foam device, secondary foam device and air transporting arrangement;
Jet-flow proportioning mixer apparatus comprises that (jet-flow proportioning device is copied the ejector of using in fire-fighting to jet-flow proportioning blender, according to actual needs, by certain calculating, obtain the size of jet-flow proportioning blender each several part, then design customized), the water under high pressure import being connected with jet-flow proportioning mixer nozzle, the colloid resistanceization liquid import being connected with jet-flow proportioning blender imbibition chamber, jet-flow proportioning blender delivery outlet is connected with one-level foam device inlet;
One-level foam device comprises the foaming chamber spiral nozzle that import is connected with colloid resistanceization liquid, in foaming chamber, be provided with foam screen, one-level foam device air inlet is connected with air transporting arrangement delivery outlet, and the outlet of one-level foam device foam solution is connected with the import of secondary foam device foam solution;
Air transporting arrangement is for providing the conveying device of gases at high pressure, and described gases at high pressure are nitrogen or carbon dioxide.
Above-mentioned jet-flow proportioning blender comprises nozzle, is positioned at the imbibition chamber of nozzle periphery, the trunnion being connected with imbibition chamber and the anemostat being connected with trunnion; Described anemostat is connected with jet-flow proportioning blender delivery outlet.
Above-mentioned foam screen is stainless steel compacting net, and described nozzle is spiral solid conical nozzle.
On the press water inlet pipeline of jet-flow proportioning blender and resistanceization liquid inlet pipeline, be respectively equipped with explosion-proof vortex-shedding meter, filter screen and mining stop valve.
The connection of one-level foam device and secondary foam device is that flange is connected, and according to the different choice of fed distance, uses two-stage foaming simultaneously or uses separately one-level foaming.
In one-level foam device, have foam screen, secondary foam device bottom is provided with tapping valve, and import is connected with air transporting arrangement delivery outlet.
The lazy bubble preparation technology of colloid resistanceization of control coal spontaneous combustion, is characterized in that: comprise the following steps:
1) the lazy bubble preparation facilities of colloid resistanceization is put near goaf, press water is entered the nozzle of jet-flow proportioning blender by press water import, at nozzle exit, due to the stiction between press water jet and air, near air nozzle is taken away, made to form negative pressure near nozzle;
2) colloid resistanceization liquid is drunk up through imbibition chamber under nozzle negative pressure and environment atmospheric pressure effect, and together enters in trunnion with press water, forms colloid resistanceization mixed liquor;
3) colloid resistanceization mixed liquor enters anemostat, pressure to anemostat exit colloid resistanceization mixed liquor flows into the pressure of trunnion higher than the colloid resistanceization liquid of being pumped, lower than press water, flow into the pressure of trunnion, colloid resistanceization mixed liquor is discharged from the anemostat of DN20mm, by spiral solid nozzle, enter one-level foam device;
4) through spiral solid nozzle, colloid resistanceization mixed liquor is sprayed onto on foam screen, and by air transporting arrangement, nitrogen enters one-level foam device, and by foam screen, colloid resistanceization mixed liquor carries out one step foaming;
5), in secondary foam device, by air transporting arrangement nitrogen injection, carry out second time of foaming.
Above-mentioned steps 2) the colloid resistanceization mixed liquor in and the volume flow ratio of press water are 3:97 or 6:94.
Above-mentioned steps 4) in, the design parameter of one step foaming is: the flow of power water is 3m
3/ h, nitrogen flow is 300-600m
3/ h; The flow that enters the colloid resistanceization mixed liquor of one-level foam device is 3.093m
3/ h or 3.191m
3/ h.
The present invention has the following advantages:
1) the present invention is usingd press water and pressure nitrogen gas as transmitting power, so safe and reliable.Because the lazy bubble of colloid resistanceization of preparing is foam-like, by the power of pressure nitrogen gas can be rapidly to the something lost coal of whole large area goaf and high bit space cover, resistance, leak stopping, prolongation spontaneous combustion period, play the effect of parcel, resistanceization, inerting and absorbing and cooling temperature, effectively suppress and prevent the development of coal spontaneous combustion.
2) the present invention can utilize down-hole nitrogen-filling system, by air transporting arrangement, the lazy bubble of colloid resistanceization is transported to the hidden region of goaf coal spontaneous combustion, and the nitrogen that enters flame range has the effect of falling oxygen inerting.Colloid inhibition foam has at short notice that fill volume is large, mobility and the feature such as accumulation is good, colloid retardant can be delivered to different-thickness, difform loose coal space or falling space, the obstruction passage that leaks out, isolated air, play smothering action, colloid retardant is attached to loose coal surface, form one deck with water and can suppress the film that oxygen contacts with coal, stop the activity chain type cyclic group reaction on oxygen and texture of coal, the affinity of coal and oxygen is reduced, and absorb coal surface oxidation free radical, stop coal body oxidation heat liberation; By foam, bring a large amount of moisture into, during evaporation, absorb a large amount of heats, play cooling effect, reduced the heating rate of loose coal.So the lazy bubble of colloid resistanceization has the anti-fire extinguishing function of multi-effect cooperative, anti-fire extinguishing effect is remarkable.
3) the present invention adopts secondary foam device, and former device relatively to have foaming effect good, fed distance is far away, the utilization rate advantages of higher to colloid resistanceization mixed liquor has well solved the problem of one-level foam device transmitting power deficiency.
4) the present invention adopts jet-flow proportioning blender to mix colloid resistanceization liquid and water, utilizes down-hole pressure water as power, does not need water pump, and then does not also need to use electricity, has guaranteed the safety of down-hole.
5) lazy brewed, the security of operation, reliable and stable little, simple in structure, easy to operate for device volume of colloid resistanceization provided by the invention, use power can adopt normal water supply, the nitrogen-filling system using in down-hole, at highly gassy mine, use safety and reliability, and to environment and personnel without any negative effect.
Accompanying drawing explanation
Fig. 1 is process flow diagram of the present invention;
Fig. 2 is structure diagram of the present invention;
1-jet-flow proportioning blender; The import of 2-press water; 3-is mining stop valve; 4-filter screen; The explosion-proof vortex-shedding meter of 5-; 6-foam device air inlet; 7-jet-flow proportioning mixer nozzle; 8-imbibition chamber; 9-trunnion; 10-anemostat; 11-jet-flow proportioning mixer outlet; The import of 12-colloid resistanceization liquid; 13-one-level foam device shell; 14-spiral nozzle; 15-foam screen; 16-foam outlet; The outlet of 17-hydrops; 18-snap joint; 19-flange-interface; 20-secondary foam device shell;
The specific embodiment
Referring to Fig. 1, Fig. 2, the lazy bubble preparation facilities of colloid resistanceization of the present invention comprises jet-flow proportioning mixer apparatus, one-level foam device, secondary foam device and air transporting arrangement.Jet-flow proportioning mixer apparatus comprises jet-flow proportioning blender 1, the press water import 2 being connected with jet-flow proportioning device nozzle 7, the colloid resistanceization liquid import 12 being connected with jet-flow proportioning device imbibition chamber 8, and jet-flow proportioning device delivery outlet 11 is connected with one-level foam device inlet; One-level foam device comprises the foaming chamber being placed in shell, the spiral nozzle 14 being connected with inlet, in foaming chamber, be provided with foam screen 15, the lazy bubble delivery outlet of colloid resistanceization of foaming chamber is connected with the lazy bubble import of secondary foam device colloid resistanceization, and foam device air inlet 6 is connected with air transporting arrangement outlet; Air transporting arrangement is for providing the conveying device of gases at high pressure, and described pressed gas is nitrogen or carbon dioxide, considers the safety to staff, preferred nitrogen.Secondary foam device air inlet 6 is connected with air transporting arrangement outlet, the lazy mouth that bubbles out of secondary foam device colloid resistanceization is connected with foam outlet 16, consider broken bubble effect and the foaming effect of retardant to foam, select polymer colloid retardant, in resistanceization liquid, add a certain amount of foam stabilizer, surfactant etc.The pressure of nitrogen is preferably 0.6～1.0MPa.
Referring to Fig. 2, jet-flow proportioning blender comprises nozzle 7, is positioned at the imbibition chamber 8 of nozzle periphery, the trunnion 9 being connected with imbibition chamber and the anemostat 10 being connected with trunnion, through a series of calculating, different according to selected pressure, and the proportioner of selecting is also different, length of throat is generally 7 times of trunnion radiuses, diffusion tube lengths is 8 times of trunnion radius, nozzle is trunnion radius to the distance of trunnion, when the pressure of press water is 0.6～1.2Mpa, the volume flow ratio of resistanceization mixed liquor and press water is 3:97 or 6:94.
Because the present invention is when working, the lazy bulb apparatus of colloid resistanceization can produce liquid in foaming process, affect foaming work, therefore, the lazy bulb apparatus of colloid resistanceization is provided with leakage fluid dram 17 on secondary foam device, and tapping valve is housed, when colloid resistanceization mixed liquor reach a certain height and affects foaming effect in secondary foam device, open tapping valve, residual liquid is discharged.
For pressure and the flow of liquid on real-time monitored pipeline, prevent that impurity from entering, on press water import 2 pipelines He on colloid resistanceization liquid import 12 pipelines, be provided with mining stop valve 3, filter screen 4, explosion-proof vortex-shedding meter 5, pipeline enclosure adopts mining quick connector; On the pipeline of air transporting arrangement air inlet, be provided with explosion-proof vortex-shedding meter 5, mining stop valve 3; The flow of press water and colloid resistanceization liquid and ratio can be utilized mining stop valve 3 to regulate and control.Foam screen 15 in one-level foam device is by flange-interface 19, be stuck in foaming chamber, can dismantle, be convenient for changing, one-level foam device is divided into two parts, by flange, connect, be convenient to installation and the replacing of solid spiral nozzle 14, can also regulate solid spiral nozzle 14 to the distance of foam screen 15.The termination of each pipeline of the present invention has adopted mining snap joint, and staff can be according to the concrete condition of the colliery degree of depth, increases flexibly, dismantles or device of the present invention is installed.
As shown in Figure 1, the use flow chart of the lazy bubble preparation facilities of colloid resistanceization, water under high pressure and colloid resistanceization liquid are by the mixing of jet-flow proportioning blender, enter one-level foam device, through one step foaming, by air transporting arrangement, enter secondary foam device, carry out second time of foaming, again, by air transporting arrangement, through foam outlet, inject target area.
Example illustrates, and pressed gas be take nitrogen as example:
Process chart as shown in Figure 1, at certain mine, the lazy bubble preparation facilities of colloid resistanceization is put near goaf, adopt down-hole special pressure water transfer pipeline, 1.0Mpa press water is entered the nozzle of jet-flow proportioning blender by press water import, at nozzle exit due to the stiction between press water jet and air, near air nozzle is taken away, make to form negative pressure (the flow velocity increase of main flow near nozzle, potential energy reduces, kinetic energy increases), under environment atmospheric pressure effect, the colloid resistanceization liquid of being pumped is drunk up (volume flow ratio of colloid resistanceization liquid and press water is 3:97 or 6:94) through imbibition chamber, and together enter in trunnion in company with press water, two bursts of liquid generation momentum-exchanges in trunnion, press water passes to part energy the colloid resistanceization liquid of being pumped, press water flow velocity slows down, the colloid resistanceization liquid velocity of being pumped is accelerated, while arriving trunnion end, the speed of two strands of liquid is gradually consistent, mixed process completes substantially, form colloid resistanceization mixed liquor and enter anemostat, at diffusion velocity in pipes, reduce gradually (kinetic energy reduces gradually), potential energy (pressure) increases gradually, pressure to anemostat exit colloid resistanceization mixed liquor flows into the pressure of trunnion higher than the colloid resistanceization liquid of being pumped, lower than press water, flow into the pressure of trunnion, last colloid resistanceization mixed liquor is discharged from the anemostat of DN20mm, by spiral solid nozzle, enter one-level foam device.
In the lazy bulb apparatus of colloid resistanceization, through spiral solid nozzle, colloid resistanceization mixed liquor is sprayed onto on foam screen, and by air transporting arrangement, nitrogen enters one-level foam device, and by foam screen, colloid resistanceization mixed liquor carries out one step foaming, and the flow of power water is 3m
3/ h, nitrogen flow is 300-600m
3/ h, calculates according to the ratio of 3:97 or 6:94, and the colloid resistanceization liquid of consumption per hour is 0.093m
3/ h or 0.191m
3/ h, the flow that enters the colloid resistanceization mixed liquor of one-level foam device is 3.093m
3/ h or 3.191m
3/ h.After one step foaming device, through test determination coefficient of foaming, can reach 60-80 doubly, in order further to strengthen utilization rate and the coefficient of foaming of resistanceization mixed liquor, in secondary foam device, carry out second time of foaming, final coefficient of foaming can reach 120-200 doubly, and the foam volume of generation is 360-700m
3/ h, surely the bubble time is greater than 20 hours.
As shown in Figure 1, after second time of foaming, pass through air transporting arrangement, through pre-buried pipeline, the lazy bubble of colloid resistanceization is transported to goaf, utilize flow behavior and transport characteristics that the lazy bubble of colloid resistanceization is good, colloid retardant is taken to remote hidden spontaneous combustion deathtrap, and can arrive the high bit space in goaf, especially ideal to prevention goaf " twice two lines " top coal and coal road spontaneous combustion effect, on coal body surface, form one deck resistanceization film, the composition of resistanceization film has very strong water imbibition, can make coal for a long time in dampness, reduce the functional group of oxidation of coal reaction or stop radical reaction, oxidation rate is suppressed, extend coal spontaneous combustion stage, nitrogen is as the power of Compressed Gas, in inerting spontaneous combustion region, also play the effect that inhibition gas and water-gas fire.And foam has the advantages that viscosity is high, elasticity is large and density is little, can move and accumulate in the space in goaf, in stope caved gangue, set up the airtight district of air.Foam also has the character of anti-thermit powder, and the moisture evaporation in foam is from absorbing heat, 1m around
3water flash to water vapour heat absorption 46021.5J, thermal capacity and the heat conductivility of coal have also increased simultaneously.Foam solution has good humidification to coal in addition, can form film on the surface of coal, hinders the absorption of coal to oxygen, weakens the oxidation of coal, reduces the electrothermal calefactive rate of coal.
After injecting the lazy bubble of colloid resistanceization, goaf spontaneous combustion is carried out to Real-Time Monitoring, carbon monoxide burst size obviously reduces, and temperature is also reduced in zone of reasonableness, anti-fire extinguishing successful.
Claims (9)
1. the lazy bubble preparation facilities of colloid resistanceization of control coal spontaneous combustion, is characterized in that: comprise successively connected jet-flow proportioning mixer apparatus, one-level foam device, secondary foam device and air transporting arrangement;
Jet-flow proportioning mixer apparatus comprises jet-flow proportioning blender, the water under high pressure import being connected with jet-flow proportioning mixer nozzle, the colloid resistanceization liquid import being connected with jet-flow proportioning blender imbibition chamber, and jet-flow proportioning blender delivery outlet is connected with one-level foam device inlet;
One-level foam device comprises the foaming chamber spiral nozzle that import is connected with colloid resistanceization liquid, in foaming chamber, be provided with foam screen, one-level foam device air inlet is connected with air transporting arrangement delivery outlet, and the outlet of one-level foam device foam solution is connected with the import of secondary foam device foam solution;
Air transporting arrangement is for providing the conveying device of gases at high pressure, and described gases at high pressure are nitrogen or carbon dioxide.
2. the lazy bubble preparation facilities of the colloid resistanceization of control coal spontaneous combustion according to claim 1, is characterized in that: described jet-flow proportioning blender comprises nozzle, is positioned at the imbibition chamber of nozzle periphery, the trunnion being connected with imbibition chamber and the anemostat being connected with trunnion; Described anemostat is connected with jet-flow proportioning blender delivery outlet.
3. the lazy bubble preparation facilities of the colloid resistanceization of control coal spontaneous combustion according to claim 1 and 2, is characterized in that: described foam screen is stainless steel compacting net, and described nozzle is spiral solid conical nozzle.
4. the lazy bubble preparation facilities of the colloid resistanceization of control coal spontaneous combustion according to claim 1 and 2, is characterized in that: on the press water inlet pipeline of jet-flow proportioning blender and resistanceization liquid inlet pipeline, be respectively equipped with explosion-proof vortex-shedding meter, filter screen and mining stop valve.
5. the lazy bubble preparation facilities of the colloid resistanceization of control coal spontaneous combustion according to claim 1 and 2, it is characterized in that: the connection of one-level foam device and secondary foam device is that flange is connected, according to the different choice of fed distance, use two-stage foaming simultaneously or use separately one-level foaming.
6. the lazy bubble preparation facilities of the colloid resistanceization of control coal spontaneous combustion according to claim 1 and 2, is characterized in that: in one-level foam device, have foam screen, secondary foam device bottom is provided with tapping valve, and import is connected with air transporting arrangement delivery outlet.
7. prevent and treat the lazy bubble preparation technology of colloid resistanceization of coal spontaneous combustion, it is characterized in that: comprise the following steps:
1) the lazy bubble preparation facilities of colloid resistanceization is put near goaf, press water is entered the nozzle of jet-flow proportioning blender by press water import, at nozzle exit, due to the stiction between press water jet and air, near air nozzle is taken away, made to form negative pressure near nozzle;
2) colloid resistanceization liquid is drunk up through imbibition chamber and is together entered in trunnion with press water under nozzle negative pressure and environment atmospheric pressure effect, forms colloid resistanceization mixed liquor;
3) colloid resistanceization mixed liquor enters anemostat, pressure to anemostat exit colloid resistanceization mixed liquor flows into the pressure of trunnion higher than the colloid resistanceization liquid of being pumped, lower than press water, flow into the pressure of trunnion, colloid resistanceization mixed liquor is discharged from the anemostat of DN20mm, by spiral solid nozzle, enter one-level foam device;
4) through spiral solid nozzle, colloid resistanceization mixed liquor is sprayed onto on foam screen, and by air transporting arrangement, nitrogen enters one-level foam device, and by foam screen, colloid resistanceization mixed liquor carries out one step foaming;
5), in secondary foam device, by air transporting arrangement nitrogen injection, carry out second time of foaming.
8. the lazy bubble preparation technology of the colloid resistanceization of control coal spontaneous combustion according to claim 7, is characterized in that: the colloid resistanceization mixed liquor described step 2) and the volume flow ratio of press water are 3:97 or 6:94.
9. the lazy bubble preparation technology of the colloid resistanceization of control coal spontaneous combustion according to claim 8, is characterized in that: in described step 4), the design parameter of one step foaming is: the flow of power water is 3m
3/ h, nitrogen flow is 300-600m
3/ h; The flow that enters the colloid resistanceization mixed liquor of one-level foam device is 3.093m
3/ h or 3.191m
3/ h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310704991.7A CN103691082B (en) | 2013-12-19 | 2013-12-19 | The lazy bubble preparation facilities of colloid resistanceization of control coal spontaneous combustion and technique thereof |
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| CN201310704991.7A CN103691082B (en) | 2013-12-19 | 2013-12-19 | The lazy bubble preparation facilities of colloid resistanceization of control coal spontaneous combustion and technique thereof |
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Cited By (4)
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| CN107441657A (en) * | 2017-09-30 | 2017-12-08 | 南京工业大学 | Three-phase jet foam produces equipment and its three-phase jet foam production method |
| CN110847948A (en) * | 2019-11-09 | 2020-02-28 | 山东唐口煤业有限公司 | Fire prevention and extinguishing system injected with composite inert gas |
| WO2021253593A1 (en) * | 2020-06-16 | 2021-12-23 | 山东科技大学 | Downhole liquid co2 phase transition-powered multi-functional filling system and usage method |
| CN117167073A (en) * | 2023-09-15 | 2023-12-05 | 中国矿业大学 | Low-temperature composite inert gas fire extinguishing system and application method thereof |
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| CN203694462U (en) * | 2013-12-19 | 2014-07-09 | 西安科技大学 | Colloid inhibition inerting foam preparation device for preventing spontaneous combustion of coal |
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| US5909775A (en) * | 1997-09-10 | 1999-06-08 | Grindley; Robert M. | Dual chamber foam pump |
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| CN117167073B (en) * | 2023-09-15 | 2024-03-12 | 中国矿业大学 | Low-temperature composite inert gas fire extinguishing system and application method thereof |
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|---|---|
| CN103691082B (en) | 2016-01-27 |
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Inventor after: Ma Li Inventor before: Deng Jun Inventor before: Fei Jinbiao Inventor before: Cheng Fangming Inventor before: Liu Wenyong Inventor before: Wen Hu Inventor before: Wang Weifeng Inventor before: Wu Linfeng Inventor before: Zhang Xinhai Inventor before: Ma Li Inventor before: Jin Yongfei Inventor before: Luo Zhenmin Inventor before: Zhang Yanni |
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Free format text: CORRECT: INVENTOR; FROM: DENG JUN WEN HU WANG WEIFENG WU LINFENG ZHANG XINHAI MA LI JIN YONGFEI LUO ZHENMIN ZHANG YANNI FEI JINBIAO CHENG FANGMING LIU WENYONG TO: MA LI |
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Granted publication date: 20160127 Termination date: 20171219 |