CN2787303Y - Device for making powder before entering coal furnace - Google Patents
Device for making powder before entering coal furnace Download PDFInfo
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- CN2787303Y CN2787303Y CN 200520002168 CN200520002168U CN2787303Y CN 2787303 Y CN2787303 Y CN 2787303Y CN 200520002168 CN200520002168 CN 200520002168 CN 200520002168 U CN200520002168 U CN 200520002168U CN 2787303 Y CN2787303 Y CN 2787303Y
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Abstract
The utility model relates to a coal powder making device before a coal furnace. The utility model is characterized in that the powder making device before a coal furnace comprises an air compressor, a baffle plate type separator, a coal ingress pipe, a coal powder sorting machine, a coal mill, a cyclone separator, a cloth bag filter, an exhaust blower and a middle material bin, wherein the baffle plate type separator is connected with the air compressor through a conveying pipe, an inlet of the coal ingress pipe is connected with an outdoor coal feeding device, an outlet of the coal ingress pipe is connected with the lower part of the conveying pipe, a feeding opening of the coal powder sorting machine is connected with the baffle plate type separator through a conveying pipe, an inlet of the coal mill is respectively connected with the baffle plate type separator and the coal powder sorting machine through two conveying pipes, an outlet of the coal mill is connected with the coal powder sorting machine through a conveying pipe, an inlet of the cyclone separator is connected with the coal powder sorting machine through a conveying pipe, an inlet of the cloth bag filter is connected with the cyclone separator through a conveying pipe, an inlet of the exhaust blower is connected with the cloth bag filter, an outlet of the exhaust blower is communicated with the outside and the middle material bin is respectively connected with the cyclone separator and the cloth bag filter through two conveying pipes. The utility model which has the advantages of simple structure and low price can be widely used in front of various medium-sized and small coal powder furnaces for feeding coal powder.
Description
Technical field
The utility model relates to a kind of coal and pulverizes processing unit (plant), particularly filters coal stokehold fuel pulverizing plant about a kind of middle-size and small-size industrial coal dust.
Background technology
Coal powder process in general sense, be that a kind of coal is pulverized and broken processing in fact, belong to the primary stage of coal powder process, the coal powder size that processes is bigger, can only supply the traditional industry boiler and use, can't satisfy the granularity requirements of efficient industrial coal powder boiler meticulous coal dust; And existing be open type operation mostly, dust pollution is more serious.
Summary of the invention
At the problems referred to above, the purpose of this utility model provide a kind of process realize hermetically sealed, full negative pressure, do not expose, free from environmental pollution, the powder process granularity can reach the above coal stokehold fuel pulverizing plant of 200 orders.
For achieving the above object, the present invention takes following technical scheme: a kind of coal stokehold fuel pulverizing plant is characterized in that it comprises: an air compressor machine; Baffle plate type separator, it connects described air compressor machine by a carrier pipe; One coal feeding pipe, the coal supply device that its import junction chamber is outer, its outlet is connected the bottom of described carrier pipe; One coal dust separator, its charging aperture connects described baffle plate type separator by a carrier pipe; One coal pulverizer, its import connects described baffle plate type separator and coal dust separator respectively by two carrier pipes, and its outlet connects described coal dust separator by a carrier pipe; One cyclone separator, its import connects described coal dust separator by a carrier pipe; One cloth envelop collector, its import connects described cyclone separator by a carrier pipe; One exhaust blower, its import connect described cloth envelop collector, and its outlet is led to outdoor; One intermediate bunker, it connects described cyclone separator and cloth envelop collector respectively by two carrier pipes.
Described baffle plate type separator comprises a sealed cylinder, described cylindrical shell top is provided with the exhaust outlet of the described coal dust separator of a connection, described cylindrical shell bottom is an inclined plane, bottommost on described inclined plane is provided with the returning charge mouth of the described coal pulverizer of a connection, at the center on described inclined plane one through hole is set, the carrier pipe that connects described air compressor machine penetrates described through hole, is positioned at described cylindrical shell middle part, is obliquely installed a striker plate above described carrier pipe.
Described coal dust separator comprises a sealed cylinder, the sidepiece of described cylindrical shell is provided with a feed pipe that connects described baffle plate type separator is connected described coal pulverizer outlet with one feed back pipe at least, described cylindrical shell bottom is tapered, and the returning charge mouth of the described coal pulverizer import of a connection is set at bottommost, described cylindrical shell is provided with the exhaust outlet of the described cyclone separator of a connection near the top, center, described cylindrical shell top is provided with a buncher, described buncher connects an impeller disk, and the described impeller disk is positioned at described cylindrical shell top.
Described coal pulverizer comprises that a motor-driven screw feeding device and three grades of hammers add the one-level fan, the outlet of described coal pulverizer is the exhaust outlet of described fan, described screw feeding device comprises a horizontal passage, three feeding screws of the described motor of one connection are set in the described passage, the middle part of described passage is vertical to be provided with one and to be sealed into hopper, and the top of described feed hopper is provided with two imports.
Described intermediate bunker is a cone seal cylindrical shell, and described cylindrical shell top is provided with two charging apertures, and described cylindrical shell bottom is provided with coal supply powder outlet.
Described cloth envelop collector comprises a casing, several filter bags are set in the described casing, and the outer surface of described filter bag is wound with plain conductor, after described plain conductor compiles, pass and ground connection from described casing one side, a side of described casing is provided with a Weight type explosion proof door.
The utility model is owing to take above technical scheme, it has the following advantages: 1, the utility model carries out the one-level sorting by baffle plate type separator to feed coal, carry out the secondary sorting by the coal dust separator, after the rough coal powder that I and II sub-elects carries out abrasive dust by coal pulverizer, return the coal dust separator again and proceed the secondary sorting, thereby the coal powder size that enters intermediate bunker can be reached more than 200 orders, can reach the requirement of coal dust retrofit fully, satisfy the confession powder needs of efficient industrial coal powder boiler.2, adopt the carrier pipe ways of connecting between each device of the utility model, make that coal dust transmits in the whole process in hermetically sealed environment, it not only can make whole powder-supply system carry by strength, and has realized that coal dust does not expose goal of the invention free from environmental pollution.3, the utility model device utilizes the striker plate of oblique setting and from the bump of the coal of the carrier pipe of inclined open ejection in baffle plate type separator, make the rough coal particle under deadweight, crash into coal pulverizer, the fines that suspends is transported to the coal dust separator under the effect of air-flow, and the centrifugal action of the impeller disk that utilization is rotated in the coal dust separator, make the rough coal particle in the coal dust under deadweight, crash into coal pulverizer, the fines that suspends is transported to cyclone separator under the effect of air-flow, thereby realized the sorting of meticulous coal dust, separating effect is good especially.4, the three grades of hammers adopting that ore grinding stone uses of the coal pulverizer in the utility model device and the device of one-level fan both can guarantee the processing effect of abrasive dust coal, can send the coal dust that processes back to the coal dust separator by the strength of fan again; The feed system of coal pulverizer adopts the single head spiral simultaneously, particularly adopts three spirals, and not only feeding speed is fast, and is difficult for stopping up.5, the cloth envelop collector among the present invention, owing to be provided with the ground wire of antistatic and explosion-proof explosion proof door, therefore safe and reliable.The utility model is simple in structure, and it is reasonable, compact to prepare between each device, and it is little to take up room, and goes slick conveniently, and it can be widely used in the stokehold of various middle-size and small-size pulverized-coal fired boilers for powder.
Description of drawings
Fig. 1 is the utility model structural representation.
Fig. 2 is the utility model baffle plate type separator structural representation.
Fig. 3 is the utility model coal dust separator structure schematic diagram.
Fig. 4 is the utility model coal dust separator impeller disk structural representation.
Fig. 5 is the utility model cloth envelop collector structural representation.
The specific embodiment
In order to describe structure of the present utility model and characteristics in detail, existing following preferred embodiment of act and conjunction with figs. describe.
As shown in Figure 1, the utility model comprise air compressor machine 1, baffle plate type separator 2, deliver coal pipe 3, coal dust separator 4, coal pulverizer 5, cyclone separator 6, cloth envelop collector 7, exhaust blower 8 and intermediate bunker 9.
The outlet of air compressor machine 1 connects baffle plate type separator 2 by a carrier pipe 11, and the outlet of coal feeding pipe 3 is connected the bottom of carrier pipe 11 near air compressor machine 1 place, the outer coal supply device of the import junction chamber of coal feeding pipe 3.The exhaust outlet of baffle plate type separator 2 connects coal dust separator 4 by carrier pipe 12, the returning charge mouth of baffle plate type separator 2 connects the feed hopper 56 of coal pulverizer 5 by carrier pipe 13, the feed hopper 56 of coal pulverizer 5 also connects the returning charge mouth of coal dust separator 4 by carrier pipe 14, the outlet of coal pulverizer 5 is connected into coal dust separator 4 inside by carrier pipe 15.The exhaust outlet of coal dust separator 4 is by the import of carrier pipe 16 connection cyclone separators 6, and the exhaust outlet of cyclone separator 6 connects cloth envelop collectors 7 by carrier pipe 17, and cloth envelop collector 7 exhaust outlets connect exhaust blower 8, and exhaust blower 8 can be extremely outdoor by the pipeline air draft.The bottom returning charge mouth of cyclone separation device 6 and cloth envelop collector 7 is connected intermediate bunker 9 by carrier pipe 18,19 respectively, and intermediate bunker 9 is a cone seal tube, and cylindrical shell bottom is provided with one and exports 91 with pulverized-coal fired boiler with the coal supply powder that device for coal is connected.
In the foregoing description, as shown in Figure 2, baffle plate type separator 2 comprises a sealed cylinder 21, and cylindrical shell 21 tops are provided with exhaust outlet 22, and cylindrical shell 21 bottoms are an inclined plane 23, lowest part on the inclined plane is provided with returning charge mouth 24,23 middle part is provided with a through hole on the inclined plane, and carrier pipe 11 penetrates through hole, is positioned at the middle part of cylindrical shell 21, the outlet top of carrier pipe 11 is obliquely installed a striker plate 25, and striker plate can be supported on the carrier pipe 11 by brace rod 26.The outlet of carrier pipe 11 can also be arranged to skewed, and its incline direction can be identical with the incline direction of striker plate 25, i.e. the coal perpendicular alignmnet striker plate 25 that sprays from carrier pipe 11.
In the foregoing description, as shown in Figure 3, Figure 4, coal dust separator 4 comprises a sealed cylinder 41, cylindrical shell 41 tops are arch, one exhaust outlet 42 is set on it, and center, cylindrical shell 41 tops is provided with a buncher 43, and its output connects an impeller disk 44, be the radial blade 45 that is provided with on the impeller disk 44, the impeller disk 44 is positioned at the top of cylindrical shell 41.The bottom of cylindrical shell 41 is tapered, at the bottommost of taper the one returning charge mouth 49 that connects coal pulverizer 5 is set, and the sidewall of cylindrical shell 41 is provided with a feed pipe 46, the outlet of feed pipe 46 upwards, carrier pipe 14 is connected the import of feed pipe 46.One feed back pipe 47 also is set on the sidewall of cylindrical shell 41, and the outlet of feed back pipe 47 also makes progress, and carrier pipe 15 is connected in the import of feed back pipe 47.Feed pipe 46 and feed back pipe 47 can be arranged on a side (as shown in Figure 1), also can divide to be located at both sides (as shown in Figure 3), even can integrate after entering cylindrical shell 41.Sidewall at cylindrical shell 41 can also be provided with a rotation air port 48, to send into along the separation of barrel rotation, increases separating effect.
In the foregoing description, as shown in Figure 1, coal pulverizer 5 comprises that a screw feeding device 52 and three grades of abrasive dust hammers that motor 51 drives add one-level fan 53 devices, three grades of abrasive dust hammers add the force one wind fan device and belong to general Weight type ore coal pulverizer common structure, the outlet of coal pulverizer 5 is the exhaust outlet 53 of fan, and it connects the feedback outlet 47 of coal dust separator by carrier pipe 15.Screw feeding device 52 comprises a horizontal passage 54, single head or three feeding screws 55 of one connection motor 51 are set in the passage 54, the middle part of passage 54 is vertical to be provided with one and to be sealed into hopper 56, that the top of feed hopper 56 is provided with a parallel connection or two imports are to connect the returning charge mouth 24,49 of baffle plate type separators 2 and coal dust separator 4 respectively by carrier pipe 13,14.
In the foregoing description, as shown in Figure 5, cloth envelop collector 7 comprises casing 71 and the some filter bags 72 that are arranged in the casing 71, is wound with plain conductor 73 on filter bag 72, each plain conductor 73 pools together from casing 71 1 sides and passes and ground connection 74, can play anti-static electrification.One side of the casing 71 of cloth envelop collector 7 can be provided with a Weight type explosion proof door 75.Explosion proof door 75 can also be taked other frame mode.The import 76 of cloth envelop collector 7 is by the exhaust outlet of carrier pipe 17 connection cyclone separators 6, and the outlet 77 of cloth envelop collector 7 is by the outer exhaust blower 8 of pipeline junction chamber, and the returning charge mouth 78 of cloth envelop collector 7 connects intermediate bunker 9 by carrier pipe 19.
In the foregoing description, air compressor machine 1, cyclone separator 6 and exhaust blower 8 can be bought off-the-shelf, do not repeat them here, and the concrete structure in above-mentioned in addition each device can change.
During the utility model operation, as shown in Figure 1, start air compressor machine 1, carry pressure-air to system, open feed pipe 3 simultaneously, coal charge just enters baffle plate type separator 2 under the negative pressure drainage effect in carrier pipe 11.In baffle plate type separator 2, at first run into the stopping of striker plate 26 of inclination from the coal charge of carrier pipe 11 ejection, coarse granule material in the coal charge can fall under the self gravitation effect, and along the inclined plane 23 of cylindrical shell 21 bottoms and the feed hopper 56 of carrier pipe 13 inflow coal pulverizers 5, continues abrasive dust; And the fine powder that enters in the coal charge of baffle plate type separator 2 can enter coal dust separator 4 from carrier pipe 12 with the air pressure in the system.In coal dust separator 4, the impeller disk 47 that the coal dust that enters from feed pipe 46 is rotated stop and by spin-up, fine powder rises under action of air pressure and enters cyclone separator 6 by the carrier pipe 16 that is connected with exhaust outlet 42, coarse granule carrier pipe 14 by returning charge mouth 49 under the effect of gravity returns coal pulverizer 5 continuation abrasive dusts, fine powder behind three grades of weight abrasive dusts is sent back to coal dust separator 4 again under the effect of fan.The coal dust that enters in the cyclone separator 6 is the meticulous coal dust that meets the requirements, and through the separating of coal dust and air, gas enters cloth envelop collector 7 by carrier pipe 17 at this, and coal dust enters intermediate bunker 9 by carrier pipe 18.The gas that enters cloth envelop collector 7 is further filtered separation, and coal dust is sent intermediate bunker 9 back to by carrier pipe 19.Air by exhaust blower 8 is discharged from cloth envelop collector 7 has reached discharge standard fully, can not pollute environment, can directly discharge outdoor.Can open as required or close with the coal supply powder outlet 91 that device for coal is connected with pulverized-coal fired boiler, also can keep the low discharge continuous feeding.
Claims (10)
1, a kind of coal stokehold fuel pulverizing plant is characterized in that it comprises:
One air compressor machine;
One baffle plate type separator, it connects described air compressor machine by a carrier pipe;
One coal feeding pipe, the coal supply device that its import junction chamber is outer, its outlet is connected the bottom of described carrier pipe;
One coal dust separator, its charging aperture connects described baffle plate type separator by a carrier pipe;
One coal pulverizer, its import connects described baffle plate type separator and coal dust separator respectively by two carrier pipes, and its outlet connects described coal dust separator by a carrier pipe;
One cyclone separator, its import connects described coal dust separator by a carrier pipe;
One cloth envelop collector, its import connects described cyclone separator by a carrier pipe;
One exhaust blower, its import connect described cloth envelop collector, and its outlet is led to outdoor;
One intermediate bunker, it connects described cyclone separator and cloth envelop collector respectively by two carrier pipes.
2, a kind of coal as claimed in claim 1 stokehold fuel pulverizing plant, it is characterized in that: described baffle plate type separator comprises a sealed cylinder, described cylindrical shell top is provided with the exhaust outlet of the described coal dust separator of a connection, described cylindrical shell bottom is an inclined plane, bottommost on described inclined plane is provided with the returning charge mouth of the described coal pulverizer of a connection, at the center on described inclined plane one through hole is set, the carrier pipe that connects described air compressor machine penetrates described through hole, be positioned at described cylindrical shell middle part, above described carrier pipe, be obliquely installed a striker plate.
3, a kind of coal as claimed in claim 1 stokehold fuel pulverizing plant, it is characterized in that: described coal dust separator comprises a sealed cylinder, the sidepiece of described cylindrical shell is provided with a feed pipe that connects described baffle plate type separator is connected described coal pulverizer outlet with one feed back pipe at least, described cylindrical shell bottom is tapered, and the returning charge mouth of the described coal pulverizer import of a connection is set at bottommost, described cylindrical shell is provided with the exhaust outlet of the described cyclone separator of a connection near the top, center, described cylindrical shell top is provided with a buncher, described buncher connects an impeller disk, and the described impeller disk is positioned at described cylindrical shell top.
4, a kind of coal as claimed in claim 2 stokehold fuel pulverizing plant, it is characterized in that: described coal dust separator comprises a sealed cylinder, the sidepiece of described cylindrical shell is provided with a feed pipe that connects described baffle plate type separator is connected described coal pulverizer outlet with one feed back pipe at least, described cylindrical shell bottom is tapered, and the returning charge mouth of the described coal pulverizer import of a connection is set at bottommost, described cylindrical shell is provided with the exhaust outlet of the described cyclone separator of a connection near the top, center, described cylindrical shell top is provided with a buncher, described buncher connects an impeller disk, and the described impeller disk is positioned at described cylindrical shell top.
5, as claim 1 or 2 or 3 or 4 described a kind of coal stokehold fuel pulverizing plants, it is characterized in that: described coal pulverizer comprises that a motor-driven screw feeding device and three grades of hammers add the one-level fan, the outlet of described coal pulverizer is the exhaust outlet of described fan, described screw feeding device comprises a horizontal passage, three feeding screws of the described motor of one connection are set in the described passage, the middle part of described passage is vertical to be provided with one and to be sealed into hopper, and the top of described feed hopper is provided with two imports.
6, as claim 1 or 2 or 3 or 4 described coal stokehold fuel pulverizing plants, it is characterized in that: described intermediate bunker is a cone seal cylindrical shell, and described cylindrical shell top is provided with two charging apertures, and described cylindrical shell bottom is provided with coal supply powder outlet.
7, coal as claimed in claim 5 stokehold fuel pulverizing plant, it is characterized in that: described intermediate bunker is a cone seal cylindrical shell, and described cylindrical shell top is provided with two charging apertures, described cylindrical shell bottom is provided with coal supply powder outlet.
8, as claim 1 or 2 or 3 or 4 described coal stokehold fuel pulverizing plants, it is characterized in that: described cloth envelop collector comprises a casing, several filter bags are set in the described casing, the outer surface of described filter bag is wound with plain conductor, after described plain conductor compiles, pass and ground connection from described casing one side, a side of described casing is provided with a Weight type explosion proof door.
9, coal as claimed in claim 5 stokehold fuel pulverizing plant, it is characterized in that: described cloth envelop collector comprises a casing, several filter bags are set in the described casing, the outer surface of described filter bag is wound with plain conductor, after described plain conductor compiles, pass and ground connection from described casing one side, a side of described casing is provided with a Weight type explosion proof door.
10, coal as claimed in claim 6 stokehold fuel pulverizing plant, it is characterized in that: described cloth envelop collector comprises a casing, several filter bags are set in the described casing, the outer surface of described filter bag is wound with plain conductor, after described plain conductor compiles, pass and ground connection from described casing one side, a side of described casing is provided with a Weight type explosion proof door.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520002168 CN2787303Y (en) | 2005-02-07 | 2005-02-07 | Device for making powder before entering coal furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520002168 CN2787303Y (en) | 2005-02-07 | 2005-02-07 | Device for making powder before entering coal furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2787303Y true CN2787303Y (en) | 2006-06-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520002168 Expired - Lifetime CN2787303Y (en) | 2005-02-07 | 2005-02-07 | Device for making powder before entering coal furnace |
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| Country | Link |
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| CN (1) | CN2787303Y (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101362113B (en) * | 2007-08-09 | 2011-02-02 | 沈阳铝镁设计研究院 | Method and system of carbonaceous material pulverizing |
| CN102985185A (en) * | 2010-05-07 | 2013-03-20 | 明宇微米系统有限公司 | Device for pulverizing and distribution transferring for coal |
| CN103447137A (en) * | 2013-08-09 | 2013-12-18 | 陕西煤业化工技术研究院有限责任公司 | Safe and efficient system and safe and efficient method for preparing powdered coal |
| CN104689897A (en) * | 2014-04-01 | 2015-06-10 | 上海化学工业区升达废料处理有限公司 | Automatic grinding system and method for cokes |
| CN105289828A (en) * | 2015-11-19 | 2016-02-03 | 金陵科技学院 | Pulverizer |
| CN105289829A (en) * | 2015-11-19 | 2016-02-03 | 金陵科技学院 | Efficient pulverizer |
| CN107214093A (en) * | 2017-06-23 | 2017-09-29 | 邵阳天元木业有限公司 | The bamboo powder separator and its method of bamboo product waste material |
| CN111595998A (en) * | 2020-05-09 | 2020-08-28 | 哈尔滨锅炉厂有限责任公司 | Pilot system for researching pyrolysis semicoke and coal synergistic combustion characteristics and NOx emission |
-
2005
- 2005-02-07 CN CN 200520002168 patent/CN2787303Y/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101362113B (en) * | 2007-08-09 | 2011-02-02 | 沈阳铝镁设计研究院 | Method and system of carbonaceous material pulverizing |
| CN102985185A (en) * | 2010-05-07 | 2013-03-20 | 明宇微米系统有限公司 | Device for pulverizing and distribution transferring for coal |
| CN103447137A (en) * | 2013-08-09 | 2013-12-18 | 陕西煤业化工技术研究院有限责任公司 | Safe and efficient system and safe and efficient method for preparing powdered coal |
| CN103447137B (en) * | 2013-08-09 | 2015-10-07 | 陕西煤业化工技术研究院有限责任公司 | One is coal dust preparation system and method safely and efficiently |
| CN104689897A (en) * | 2014-04-01 | 2015-06-10 | 上海化学工业区升达废料处理有限公司 | Automatic grinding system and method for cokes |
| CN104689897B (en) * | 2014-04-01 | 2017-04-26 | 上海化学工业区升达废料处理有限公司 | Automatic grinding system and method for cokes |
| CN105289828A (en) * | 2015-11-19 | 2016-02-03 | 金陵科技学院 | Pulverizer |
| CN105289829A (en) * | 2015-11-19 | 2016-02-03 | 金陵科技学院 | Efficient pulverizer |
| CN107214093A (en) * | 2017-06-23 | 2017-09-29 | 邵阳天元木业有限公司 | The bamboo powder separator and its method of bamboo product waste material |
| CN111595998A (en) * | 2020-05-09 | 2020-08-28 | 哈尔滨锅炉厂有限责任公司 | Pilot system for researching pyrolysis semicoke and coal synergistic combustion characteristics and NOx emission |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: CHINA COAL RESEARCH INSTITUTE CO., LTD. Free format text: FORMER OWNER: BEIJING COAL-CHEMICAL BRANCH OF COAL-SCIENCE GENERAL ACADEMY Effective date: 20140825 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20140825 Address after: 100013 Chaoyang District, Hepingli Youth Ditch Road, No. 5, No. Patentee after: Co., Ltd of coal science and technology academy Address before: 100013 Chaoyang District, Hepingli Youth Ditch Road, No. 5, No. Patentee before: Beijing Coal-Chemical Branch of Coal-Science General Academy |
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| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20150207 Granted publication date: 20060614 |