CN202865191U - System device for preparing water coal slurry by conveyed coal of long-distance pipeline - Google Patents
System device for preparing water coal slurry by conveyed coal of long-distance pipeline Download PDFInfo
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- CN202865191U CN202865191U CN 201220532646 CN201220532646U CN202865191U CN 202865191 U CN202865191 U CN 202865191U CN 201220532646 CN201220532646 CN 201220532646 CN 201220532646 U CN201220532646 U CN 201220532646U CN 202865191 U CN202865191 U CN 202865191U
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Abstract
The utility model discloses a system device for preparing water coal slurry by conveyed coal of a long-distance pipeline. Raw material coal from a coal storage cabin is conveyed to a crushing workshop through a transferring belt to be crushed to be lower than 6 mm through a crushing machine; then the coal is conveyed to a preparation cabin scraper plate of a slurry making workshop through a fine coal belt so as to enter a buffering cabin before milling; coal in the buffering cabin before milling is conveyed into a coal milling machine through a quantitative coal feeder; water is added to mill slurry and pre-sieving is carried out; after the coal is milled into slurry, the slurry is conveyed into a safety screen to be checked and graded; overtails are conveyed into a slurry returning pot; the slurry of the slurry returning pot is pumped back to the coal milling machine through the slurry returning pot to be milled again; screen underflow enters a coal slurry buffering pot and is pumped into a slurry storage pot by the coal slurry buffering pot; an inlet end of the coal milling machine is communicated with a water feeding metering pump; and the slurry storage pot is provided with an agitating device. The system device disclosed by the utility model has the advantages of simple process, high automation degree and stable slurry; and under a normal-temperature condition, the raw material coal and the water are milled and sieved according to a ratio to obtain the slurry, and the slurry can realize long-distance pipeline conveying and is easy to dehydrate. The system device can be widely applied to a pipeline slurry conveying industry.
Description
Technical field
The utility model relates to a kind of preparation system of special coal slurry, is specifically related to a kind of preparation system that long-distance transportation through pipeline is used coal slurry for preparing.
Background technology
At present, China coal industry is being carried out structural adjustment, greatly develops the deep processing of coal, implements the coals such as Coal Chemical Industry, coal Electricity Federation battalion and produces the transportation and sales Integration Strategy, and carrying for the pipeline of coal provides opportunity to develop.Angle from the coal outward transport, traditional Ways of coal haulage such as railway, highway and water transport etc. can not be satisfied the needs that China " transfers coal from the west to the east, transports the coal in the North to the South " because of various reasons fully, and pipeline coal transporting is as a kind of novel mode of transport, having the many advantages such as efficient, environmental protection, low cost, is the good complement to traditional Ways of coal haulage.
The core content of the defeated coal technology of long-distance pipe: with the head coal product of coal separating plant after adding water grinding etc. and processing, be prepared into the slurry that is suitable for long-distance transportation through pipeline, the high pressure that recycles one or more booster stations generations is delivered to the terminal user with the coal slurry relay, and use in electric power supply plant or chemical plant after the dehydration.As the primary link of the defeated coal technology of long-distance pipe, how to prepare this coal slurry that does not precipitate plugging in the transportation and be conducive to the terminal processed that can guarantee and just seem most important.
On the one hand, be subjected to the restriction of many factors, at present China is not yet forming system aspect the defeated coal technical study of interior long-distance pipe comprising the coal slurry preparation, and scientific payoffs is also almost nil.
On the other hand, although China has obtained considerablely progressive in high-concentration coal-water slurry Study on Preparation Technology and engineering application facet in recent years, for the fuel resource that solves China increasingly shortage problem found new approach, but adopt the coal water slurry of this technology preparation can not realize long-distance transportation through pipeline.In addition, high-concentration coal-water slurry also need add the additive that accounts for dry coal quality 2% and improve its flowability and stable in preparation process, and these additives are expensive, greatly increased the operation cost of enterprise.
Summary of the invention
For the problems referred to above, the utility model provides the preparation system of the preparation long-distance transportation through pipeline usefulness coal slurry that a kind of technique is simple, level of automation is high, slurry is stable, slurrying efficient is high.
In order to overcome the deficiencies in the prior art, the technical solution of the utility model is to solve like this: a kind of long-distance transportation through pipeline for preparing is comprised of crushing plant and slip house with the preparation system of coal slurry, and described crushing plant comprises feed coal, reprinting belt, crusher, the smalls belt from coal store; Described slip house comprises Distribution Warehouse scraper plate, the front surge bunker of mill, quantitative feeder, coal pulverizer, safe screen, screen overflow, returns the slurry tank, returns slurry tank pump, screen underflow, coal slurry surge tank, coal slurry surge tank pump, slurry can, water metering pump, whipping appts, special character of the present utility model is: the feed coal from coal store is at first delivered to crushing plant by reprinting belt, to 6mm, the Distribution Warehouse scraper plate that then is transported to slip house by the smalls belt enters surge bunker before the mill through crusher in crushing; Coal before the described mill in the surge bunker is transported to coal pulverizer by quantitative feeder again and adds water mill slurry, pre-screening, send into safe screen behind the grinding pulping and carry out Inspection graduation, its screen overflow is sent into and is returned in the slurry tank, the described slurries that return the slurry tank are regrinded by returning in the slurry tank pumped back coal pulverizer, and its screen underflow enters in the coal slurry surge tank to be pumped in the slurry can by the coal slurry surge tank and stores; Described coal pulverizer inlet end is communicated with a water metering pump, and described slurry can is provided with whipping appts.
The utility model can obtain a kind of slurry by feed coal and water according to specified proportion grinding, screening under normal temperature condition, described slurry can be realized long-distance transportation through pipeline and be easy to dehydration.
To 6mm, according to the granularity situation of feed coal, described crushing plant can arrange one section or two sections fragmentations to described feed coal from coal store through crusher in crushing.
Described smalls belt and Distribution Warehouse scraper plate are dual system and arrange, the using and the reserved.
Surge bunker top is skeleton construction before the described mill, and the bottom is hyperbola or conical steel construction, and the bulkhead inclination angle should not be lower than 65 °;
Described coal pulverizer material feeding end is provided with the front surge bunker of mill, quantitative feeder and water metering pump, effective capacity of surge bunker is corresponding coal pulverizer 2～4h coal consumption before the described mill, the conveying coal amount of described quantitative feeder is complementary with the processing power of corresponding coal pulverizer, and described water metering pump can measure and regulate the water loss of coal pulverizer.
Described coal pulverizer is the overflow type rod mill, described overflow type rod mill is mainly by cylindrical shell, end cap, transmission gear means, high-low pressure petrol station, transmission mechanism, main bearing babbitting jig section, liner plate, feeding device and drawing mechanism etc. partly form at a slow speed, described cylindrical shell length-to-diameter ratio is 1.2～2, and inwall is equipped with liner plate; Described overflow type rod mill adopts the rod iron of diameter 40～100mm as grinding media, the short 25～50mm of the Length Ratio rod mill cylindrical shell of described rod iron, and the rod iron Intake Quantity is 25%～45% of rod mill useful volume.
Described coal pulverizer drawing mechanism is provided with the coal slurry trommel screen, is provided with the returning charge spirane structure in the described coal slurry trommel screen screen cloth, can make the qualified material overflow discharge and cross thick material and return described coal pulverizer cylindrical shell and regrind; Described coal slurry trommel screen adopts trapezoidal wedge-wire sereen net, and percentage of open area is 40%～60%.
Described slurry can number is 2～4, the coal slurry amount that its total useful volume is described production system 8～24h; Described slurry can aspect ratio is generally 1:1, is provided with whipping appts and flow apron in the tank.
Described whipping appts adopts jacking-type to install, and its stir shaft is tubular shaft, is fixed with 1～3 layer of paddle and axle head spacing ring on the described stir shaft; Described flow apron number is 3～6.
The coal slurry product weight concentration of described production system preparation is 50%～58%.
The utility model compared with prior art, it has the following advantages: 1, the utility model is conceived to solve the remote conveying difficult problem of coal from a brand-new angle, has found a new coal transport way; 2, the utility model does not need to add any medicament, only carries by the reasonably combined remote safety economy of the coal ground of just can realizing of coal and water; 3, the utility model has improved use value and the range of application of the larger coals of water content such as low-rank coal.
Description of drawings
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the main TV structure synoptic diagram of coal pulverizer;
Fig. 3 is the A-A sectional view of Fig. 2.
Among Fig. 1: 1-crushing plant, 2-slip house, 3-are from the feed coal of coal store, and 4-reprints belt, the 5-crusher, 6-smalls belt, 7-Distribution Warehouse scraper plate, surge bunker before the 8-mill, the quantitative feeder of 9-, 10-coal pulverizer, 11-safe screen, 12-screen overflow, 13-return the slurry tank, and 14-returns slurry tank pump, the 15-screen underflow, 16-coal slurry surge tank, 17-coal slurry surge tank pump, the 18-slurry can, 19-whipping appts, 20-water metering pump.
Among Fig. 2 and Fig. 3: 1-feeding device, 2-main bearing babbitting jig section, 3-barrel, the 4-transmission gear means, the 5-driving section, 6-drawing mechanism, 7-ground base portion, 8-is drive unit at a slow speed, the 9-rod adding device, 10-high pressure lifting device, 11-main bearing babbitting jig high-low pressure petrol station, 12-main gear reducer petrol station, 13-spraying gear lubrication fittings.
Embodiment
Below in conjunction with accompanying drawing the utility model is described in detail.
With reference to shown in Figure 1, a kind of long-distance transportation through pipeline for preparing is comprised of crushing plant 1 and slip house 2 with the preparation system of coal slurry, and described crushing plant 1 comprises feed coal 3, reprinting belt 4, crusher 5, the smalls belt 6 from coal store; Described slip house 2 comprises Distribution Warehouse scraper plate 7, the front surge bunker 8 of mill, quantitative feeder 9, coal pulverizer 10, safe screen 11, screen overflow 12, returns slurry tank 13, returns slurry tank pump 14, screen underflow 15, coal slurry surge tank 16, coal slurry surge tank pump 17, slurry can 18, whipping appts 19, water metering pump 20.
As shown in Figures 2 and 3, described coal pulverizer is the overflow type rod mill, mainly by feeding device 1, main bearing babbitting jig section 2, barrel 3, transmission gear means 4, driving section 5, drawing mechanism 6, ground base portion 7, drive unit 8 at a slow speed, rod adding device 9, high pressure lifting device 10, main bearing babbitting jig high-low pressure petrol station 11, main gear reducer petrol station 12, spraying gear lubrication fittings 13 parts form, wherein barrel 3 front sides link to each other with feeding device 1 by a main bearing babbitting jig section 2, barrel 3 rear sides link to each other with drawing mechanism 6 by another main bearing babbitting jig section 2, barrel 3 rear sides leave interface, barrel 3 outer rims link to each other with transmission gear means 4, this transmission gear means 4 links to each other with driving section 5, and this driving section 5 links to each other with drive unit 8 at a slow speed.Barrel 3 tops are provided with two high pressure lifting devices, 10, two main bearing babbitting jig sections 2 and link to each other with main bearing babbitting jig high-low pressure petrol station 11, and the main gear reducer of driving section 5 links to each other with main gear reducer petrol station 12, and the gear of transmission gear means 4 links to each other with spraying gear lubrication fittings 13.
The utility model can obtain a kind of slurry by feed coal and water according to specified proportion grinding, screening under normal temperature condition, described slurry can be realized long-distance transportation through pipeline and be easy to dehydration.
To 6mm, according to the granularity situation of feed coal, described crushing plant can arrange one section or two sections fragmentations to described feed coal from coal store through crusher in crushing.
Described smalls belt and Distribution Warehouse scraper plate are dual system and arrange, the using and the reserved.
Surge bunker top is skeleton construction before the described mill, and the bottom is hyperbola or conical steel construction, and the bulkhead inclination angle should not be lower than 65 °;
Described coal pulverizer material feeding end is provided with the front surge bunker of mill, quantitative feeder and water metering pump, effective capacity of surge bunker is corresponding coal pulverizer 2～4h coal consumption before the described mill, the conveying coal amount of described quantitative feeder is complementary with the processing power of corresponding coal pulverizer, and described water metering pump can measure and regulate the water loss of coal pulverizer.
Described coal pulverizer adopts the rod iron of diameter 40～100mm as grinding media, the short 25～50mm of the Length Ratio rod mill cylindrical shell of described rod iron, and the rod iron Intake Quantity is 25%～45% of rod mill useful volume.
Described coal pulverizer drawing mechanism is provided with the coal slurry trommel screen, is provided with the returning charge spirane structure in the described coal slurry trommel screen screen cloth, can make the qualified material overflow discharge and cross thick material and return described coal pulverizer cylindrical shell and regrind; Described coal slurry trommel screen adopts trapezoidal wedge-wire sereen net, and percentage of open area is 40%～60%.
Described slurry can number is 2～4, the coal slurry amount that its total useful volume is described production system 8～24h; Described slurry can aspect ratio is generally 1:1, is provided with whipping appts and flow apron in the tank.
Described whipping appts adopts jacking-type to install, and its stir shaft is tubular shaft, is fixed with 1～3 layer of paddle and axle head spacing ring on the described stir shaft; Described flow apron number is 3～6.
The coal slurry product weight concentration of described production system preparation is 50%～58%.
Working process of the present utility model is as follows:
Described feed coal 3 from coal store is at first delivered to crushing plant 1 by reprinting belt 4, is crushed to below the 6mm through crusher 5, and the Distribution Warehouse scraper plate 7 that then is transported to slip house 2 by smalls belt 6 enters surge bunker 8 before the mill; Coal before the described mill in the surge bunker 8 is transported to coal pulverizer 10 by quantitative feeder 9 again and adds water mill slurry, pre-screening, adding water grinds and to send into safe screen 11 behind the pulping and carry out Inspection graduation, its screen overflow 12 is sent into and is returned in the slurry tank 13, the described slurry of slurry in the tank 13 that return sent back in the coal pulverizer 10 and regrinded by returning slurry tank pump 14, and its screen underflow 15 enters to be delivered to slurry can 18 by coal slurry surge tank pump 17 in the coal slurry surge tank 16 and store; Described coal pulverizer 10 inlet ends are communicated with a water metering pump 20, and described slurry can 18 is provided with whipping appts 19.
The above has carried out exemplary description to the utility model by reference to the accompanying drawings; obvious realization of the present utility model is not subjected to the restriction of aforesaid way; as long as adopted the device design of utility model and the various improvement that technical scheme is carried out; or without improving design of the present utility model and technical scheme are directly applied to other occasion, all in protection domain of the present utility model.
Claims (10)
1. a long-distance pipe is failed the system and device that coal prepares coal water slurry, and this production system is comprised of crushing plant and slip house, and described crushing plant comprises feed coal, reprinting belt, crusher, the smalls belt from coal store; Described slip house comprises Distribution Warehouse scraper plate, the front surge bunker of mill, quantitative feeder, coal pulverizer, safe screen, screen overflow, returns the slurry tank, returns slurry tank pump, screen underflow, coal slurry surge tank, coal slurry surge tank pump, slurry can, water metering pump, whipping appts, it is characterized in that: described feed coal from coal store (3) is at first delivered to crushing plant (1) by reprinting belt (4), be crushed to below the 6mm through crusher (5), the Distribution Warehouse scraper plate (7) that then is transported to slip house (2) by smalls belt (6) enters surge bunker (8) before the mill; Coal before the described mill in the surge bunker (8) is transported to coal pulverizer (10) by quantitative feeder (9) again and adds water mill slurry, pre-screening, adding water grinds and to send into safe screen (11) behind the pulping and carry out Inspection graduation, its screen overflow (12) is sent into and is returned in the slurry tank (13), the described slurry that returns in slurry tank (13) is sent back in the coal pulverizer (10) and is regrinded by returning slurry tank pump (14), and its screen underflow (15) enters to be delivered to slurry can (18) by coal slurry surge tank pump (17) in the coal slurry surge tank (16) and store; Described coal pulverizer (10) inlet end is communicated with a water metering pump (20), and described slurry can (18) is provided with whipping appts (19).
2. a kind of long-distance transportation through pipeline for preparing according to claim 1 is with the preparation system of coal slurry, it is characterized in that: described feed coal from coal store through crusher in crushing to 6mm, according to the granularity situation of feed coal, described crushing plant can arrange one section or two sections fragmentations.
3. a kind of long-distance transportation through pipeline for preparing according to claim 1 is with the preparation system of coal slurry, and it is characterized in that: described smalls belt and Distribution Warehouse scraper plate are dual system and arrange, the using and the reserved.
4. a kind of long-distance transportation through pipeline for preparing according to claim 1 is with the preparation system of coal slurry, and it is characterized in that: surge bunker top is skeleton construction before the described mill, and the bottom is hyperbola or conical steel construction, and the bulkhead inclination angle is not less than 65 °.
5. a kind of long-distance transportation through pipeline for preparing according to claim 1 is with the preparation system of coal slurry, it is characterized in that: described coal pulverizer material feeding end is provided with the front surge bunker of mill, quantitative feeder and water metering pump, effective capacity of surge bunker is corresponding coal pulverizer 2～4h coal consumption before the described mill, the conveying coal amount of described quantitative feeder is complementary with the processing power of corresponding coal pulverizer, and described water metering pump can measure and regulate the water loss of coal pulverizer.
6. a kind of long-distance transportation through pipeline for preparing according to claim 1 is with the preparation system of coal slurry, it is characterized in that: described coal pulverizer is the overflow type rod mill, described overflow type rod mill is mainly by cylindrical shell, end cap, transmission gear means, high-low pressure petrol station, transmission mechanism, main bearing babbitting jig section, liner plate, feeding device and drawing mechanism etc. partly form at a slow speed, described cylindrical shell length-to-diameter ratio is 1.2～2, and inwall is equipped with liner plate; Described overflow type rod mill adopts the rod iron of diameter 40～100mm as grinding media, the short 25～50mm of the Length Ratio rod mill cylindrical shell of described rod iron, and the rod iron Intake Quantity is 25%～45% of rod mill useful volume.
7. a kind of long-distance transportation through pipeline for preparing according to claim 1 is with the preparation system of coal slurry, it is characterized in that: described coal pulverizer drawing mechanism is provided with the coal slurry trommel screen, be provided with the returning charge spirane structure in the described coal slurry trommel screen screen cloth, described coal slurry trommel screen is trapezoidal wedge-wire sereen net, and percentage of open area is 40%～60%.
8. a kind of long-distance transportation through pipeline for preparing according to claim 1 is with the preparation system of coal slurry, and it is characterized in that: described slurry can number is 2～4, the coal slurry amount that its total useful volume is described preparation system 8～24h; Described slurry can aspect ratio is generally 1:1, is provided with whipping appts and flow apron in the tank.
9. a kind of long-distance transportation through pipeline for preparing according to claim 7 is with the preparation system of coal slurry, and it is characterized in that: described whipping appts adopts jacking-type to install, and its stir shaft is tubular shaft, is fixed with 1～3 layer of paddle and axle head spacing ring on the described stir shaft; Described flow apron number is 3～6.
10. a kind of long-distance transportation through pipeline for preparing according to claim 1 is with the preparation system of coal slurry, and it is characterized in that: the coal slurry product weight concentration of described preparation system preparation is 50%～58%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220532646 CN202865191U (en) | 2012-10-18 | 2012-10-18 | System device for preparing water coal slurry by conveyed coal of long-distance pipeline |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201220532646 CN202865191U (en) | 2012-10-18 | 2012-10-18 | System device for preparing water coal slurry by conveyed coal of long-distance pipeline |
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| CN202865191U true CN202865191U (en) | 2013-04-10 |
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| CN 201220532646 Expired - Fee Related CN202865191U (en) | 2012-10-18 | 2012-10-18 | System device for preparing water coal slurry by conveyed coal of long-distance pipeline |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102899109A (en) * | 2012-10-18 | 2013-01-30 | 中煤科工集团武汉设计研究院 | System device for preparing coal water slurry by long-distance pipeline coal transportation |
| CN105293036A (en) * | 2014-06-30 | 2016-02-03 | 中煤科工集团武汉设计研究院有限公司 | Long-distance coarse particle coal transportation pipeline terminal storage device and method |
| CN107267234A (en) * | 2017-06-16 | 2017-10-20 | 湖北宜化集团有限责任公司 | The water-coal-slurry for eliminating peculiar smell prepares processing system |
| CN110510413A (en) * | 2019-09-20 | 2019-11-29 | 中煤科工集团武汉设计研究院有限公司 | A kind of pipeline coarse granule coal slurry device and its delivery method |
| CN110642016A (en) * | 2019-09-20 | 2020-01-03 | 中煤科工集团武汉设计研究院有限公司 | Coarse particle coal slurry pipeline feeding system and feeding method thereof |
| CN111073715A (en) * | 2020-01-10 | 2020-04-28 | 陕西神渭煤炭管道运输有限责任公司 | Production equipment and production method for converting pipe coal slurry into gasified coal water slurry |
| CN111073716A (en) * | 2020-01-10 | 2020-04-28 | 陕西神渭煤炭管道运输有限责任公司 | Production equipment and production method of coal slurry for pipe transportation |
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2012
- 2012-10-18 CN CN 201220532646 patent/CN202865191U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102899109A (en) * | 2012-10-18 | 2013-01-30 | 中煤科工集团武汉设计研究院 | System device for preparing coal water slurry by long-distance pipeline coal transportation |
| CN105293036A (en) * | 2014-06-30 | 2016-02-03 | 中煤科工集团武汉设计研究院有限公司 | Long-distance coarse particle coal transportation pipeline terminal storage device and method |
| CN107267234A (en) * | 2017-06-16 | 2017-10-20 | 湖北宜化集团有限责任公司 | The water-coal-slurry for eliminating peculiar smell prepares processing system |
| CN110510413A (en) * | 2019-09-20 | 2019-11-29 | 中煤科工集团武汉设计研究院有限公司 | A kind of pipeline coarse granule coal slurry device and its delivery method |
| CN110642016A (en) * | 2019-09-20 | 2020-01-03 | 中煤科工集团武汉设计研究院有限公司 | Coarse particle coal slurry pipeline feeding system and feeding method thereof |
| CN110510413B (en) * | 2019-09-20 | 2020-05-15 | 中煤科工集团武汉设计研究院有限公司 | Device and method for conveying coarse-particle coal slurry through pipeline |
| CN111073715A (en) * | 2020-01-10 | 2020-04-28 | 陕西神渭煤炭管道运输有限责任公司 | Production equipment and production method for converting pipe coal slurry into gasified coal water slurry |
| CN111073716A (en) * | 2020-01-10 | 2020-04-28 | 陕西神渭煤炭管道运输有限责任公司 | Production equipment and production method of coal slurry for pipe transportation |
| CN111073716B (en) * | 2020-01-10 | 2023-10-27 | 陕西神渭煤炭管道运输有限责任公司 | Production equipment and production method of pipe coal slurry |
| CN111073715B (en) * | 2020-01-10 | 2023-10-27 | 陕西神渭煤炭管道运输有限责任公司 | Production equipment and production method for converting pipe coal slurry into gasified coal water slurry |
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Owner name: SHAANXI SHENWEI COAL PIPELINE TRANSPORTATION CO., Effective date: 20150415 |
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Owner name: WUHAN DESIGN AND RESEARCH INSTITUTE CO., LTD. PF C Free format text: FORMER NAME: WUHAN DESIGN AND RESEARCH INSTITUTE OF CHINA COAL TECHNOLOGY + ENGINEERING GROUP |
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Address after: 430064 Hubei Province, Wuhan city Wuchang District Wuluo Road No. 442 Patentee after: WUHAN DESIGN & RESEARCH INSTITUTE CO., LTD. OF CHINA COAL TECHNOLOGY & ENGINEERING Group Address before: 430064 Hubei Province, Wuhan city Wuchang District Wuluo Road No. 442 Patentee before: Wuhan Design and Research Institute of China Coal Technology & Engineering Group |
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Effective date of registration: 20150415 Address after: 430064 Hubei Province, Wuhan city Wuchang District Wuluo Road No. 442 Patentee after: WUHAN DESIGN & RESEARCH INSTITUTE CO., LTD. OF CHINA COAL TECHNOLOGY & ENGINEERING Group Patentee after: Shaanxi Shenwei Coal Pipeline Transportation Co.,Ltd. Address before: 430064 Hubei Province, Wuhan city Wuchang District Wuluo Road No. 442 Patentee before: WUHAN DESIGN & RESEARCH INSTITUTE CO., LTD. OF CHINA COAL TECHNOLOGY & ENGINEERING Group |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130410 Termination date: 20161018 |
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| CF01 | Termination of patent right due to non-payment of annual fee |