CN201627598U - Heat damage mine local refrigerating and cooling system - Google Patents
Heat damage mine local refrigerating and cooling system Download PDFInfo
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- CN201627598U CN201627598U CN 200920206967 CN200920206967U CN201627598U CN 201627598 U CN201627598 U CN 201627598U CN 200920206967 CN200920206967 CN 200920206967 CN 200920206967 U CN200920206967 U CN 200920206967U CN 201627598 U CN201627598 U CN 201627598U
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Abstract
The utility model discloses a heat damage mine local refrigerating and cooling system which comprises a refrigerating unit and a heat extraction circulating system; the refrigerating unit comprises a compressor, a condenser, an expansion valve and an evaporator; the heat extraction circulating system at least comprises at least a heat radiator, the heat generated by the refrigerating unit is discharged by the heat extraction circulating system, the refrigerating unit can respectively adopt refrigerant and water as the coolant to form a direct-cooling refrigerating circulation system and a water-cooling refrigerating circulation system; the heat damage mine local refrigerating and cooling system has low cooling loss, economic operation and use one of the refrigerating modes or the combination of the two refrigerating modes according to the distance of the cooling energy transfer; meanwhile, the heat damage mine local refrigerating and cooling system also can be applicable to the mines in greater depth by a high and low voltage changeover switch and have extensive application range.
Description
Technical field
The utility model relates to a kind of large-scale chiller plant, the local refrigeration cool-down of particularly a kind of heat evil mine system.
Background technology
Because the increase of the pit mining degree of depth, and high temperature rock heat, air be from the influence of thermals source such as the heat of compression, plant equipment heat radiation, the heat of oxidation, and it is harmful that heat appears in increasing mine.The heat evil is one of restriction mine safety factor of production, not only endangers the healthy of staff, and can reduce labor productivity, reduces economic benefit.China's " safety regulations in coal mine " regulation: " mine main getting working face air themperature must not surpass 18 ℃, and dynamo-electric chamber air themperature must not be above 30 ℃; When the getting working face air themperature surpasses 30 ℃, when dynamo-electric chamber air themperature surpasses 34 ℃, must stop operation ", " mine safety regulations " regulation: " air themperature of underground labour's operating location must not be higher than 28 ℃ ".
China is world's first coal power, also is the maximum country of high-temperature mine quantity.According to incompletely statistics, have at present more than 130 heat evil has in various degree been appearred in mine, 88 pairs of coal mine excavation work plane temperature are wherein arranged above 30 ℃, the mining depth of these mines is on average about about 800m, the mine that surpasses km is existing tens of right, and the non-coal mine that enters the exploitation of the km degree of depth is also more and more.In the coal gross reserves of China prediction, 73.2% reserves buried depth is arranged below 1000m, wherein the coal reserves in 1000m～2000m depth bounds accounts for 53.2%.Therefore, underground thermal pollution becomes more and more current urgent problems of mine, and from the angle of scientific development, effective improvement of underground thermal pollution has the important strategic meaning to the mineral resources that China will exploit in the bigger depth bounds from now on.
China's underground thermal pollution was administered since the seventies in 20th century, go through the theoretical research stage at initial stage, the trial stage of the falling temperature technique measure in mid-term and the large-scale application stage since 21 century, formed applied range, governing measure variation, the sweeping underground thermal pollution improvement of refrigeration situation.But this situation and present situation exist contradiction: undue external importing technology and the equipment of relying on of many large-scale mines.Overseas equipment is effective, but cost an arm and a leg, be several times of home equipment, and the maintenance and management difficulty is big, maintenance cycle is long; The home equipment scale is big, bulky, do not form complete technology and equipment, though price is relatively cheap, refrigeration is undesirable, and cold damage is big.
Both at home and abroad underground thermal pollution is administered practice and is shown that the most effectively the underground thermal pollution governing measure is local refrigeration cool-down and ground central refrigerating cooling, but not have the pattern of fixing, be at different mine design different temperature reduction technologies.Domestic local refrigeration cool-down technology and equipment at present is not very good, and its key is that condensation heat can not effectively be discharged.Moreover, the heat of heat extraction is not effectively utilized yet, and thermal source is not effectively utilized.
At above-mentioned deficiency, exploitation energy-saving and environmental protection, economy, complete set technology and equipment are efficiently administered underground thermal pollution and to be significant.
The utility model content
In view of this, the utility model provides the local refrigeration cool-down of a kind of heat evil mine system, and this system has energy-saving and environmental protection, economy, characteristics of high efficiency, can effectively administer underground thermal pollution.
The local refrigeration cool-down of heat evil mine of the present utility model system comprises the refrigeration unit and the heat extraction circulating system, and described refrigeration unit comprises compressor, condenser, expansion valve and the evaporimeter that is communicated with the formation loop successively; The described heat extraction circulating system comprises at least one radiator, and the coolant outlet of described condenser and cooling water inlet are communicated with radiator respectively and form heat-radiation loop.
Further, described evaporimeter is arranged at the coal mine excavation work plane and forms the direct-cooling type cooling cycle system;
Further, described refrigeration unit also comprises air cooler, and the chilled water outlet of described evaporimeter and chilled water inlet are communicated with air cooler respectively and form the water cooled refrigeration circulating system;
Further, be connected with at least two air coolers on the described evaporimeter, be connected by the heat-insulation and heat-preservation pipeline between evaporimeter and the air cooler;
Further, flow direction along chilled water between the chilled water inlet of described air cooler and evaporimeter is disposed with hydrotreater and expansion tank, described expansion tank is provided with filling pipe and blow-off pipe, is provided for controlling the float valve of automatic water supplement on the filling pipe;
Further, be provided with the used heat use device between described condenser and the radiator;
Further, be provided with soaking type heat exchanger between described used heat use device and the radiator;
Further, be disposed with hydrotreater and expansion tank along the cooling-water flow direction between the coolant outlet of described condenser and the radiator, described expansion tank is provided with filling pipe and blow-off pipe, is provided for controlling the float valve of automatic water supplement on the filling pipe;
Further, described radiator is provided with water spray system;
Further, between described condenser and the radiator, be respectively arranged with the high-low pressure conversion equipment between evaporimeter and the air cooler.
The beneficial effect of utility model: the local refrigeration cool-down of heat evil mine of the present utility model system, comprise the refrigeration unit and the heat extraction circulating system, described refrigeration unit comprises compressor, condenser, expansion valve and the evaporimeter that is communicated with the formation loop successively; The described heat extraction circulating system comprises at least one radiator, the coolant outlet of described condenser and cooling water inlet are communicated with radiator respectively and form heat-radiation loop, during use, the compressed machine of cold-producing medium is compressed into high temperature and high pressure steam and enters condenser, carry out in condenser, being condensed into liquid refrigerant after the interchange of heat with cooling water, and be that the refrigerant liquid of low-temp low-pressure is as system's low-temperature receiver through the expansion valve step-down, the cooling water that has carried out interchange of heat with high-temperature high-pressure refrigerant in the condenser is transported to the radiator that is arranged at ground and dispels the heat, to guarantee the normal operation of system, this system is applied widely, refrigeration modes that can be different according to the actual conditions choose reasonable.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further described.
Fig. 1 is a principle schematic of the present utility model;
Fig. 2 is the utility model direct-cooling type cooling cycle system principle schematic;
Fig. 3 is the utility model water cooled refrigeration circulating system principle schematic;
Fig. 4 is freezed by the direct-cooling type cooling cycle system and the water cooled refrigeration circulating system simultaneously for the utility model and the principle schematic during concentrated heat extraction;
Fig. 5 is for being applicable to the local refrigeration cool-down system principle of the heat evil mine schematic diagram of the remote big discrepancy in elevation (discrepancy in elevation is greater than 100 meters) transmission refrigerant.
The specific embodiment
Embodiment 1:
Fig. 1 is a principle schematic of the present utility model; Fig. 2 is the utility model direct-cooling type cooling cycle system principle schematic; Fig. 3 is the utility model water cooled refrigeration circulating system principle schematic; Fig. 4 is freezed by the direct-cooling type cooling cycle system and the water cooled refrigeration circulating system simultaneously for the utility model and the principle schematic during concentrated heat extraction, as shown in the figure: the local refrigeration cool-down of the heat evil mine system of present embodiment, comprise three refrigeration unit 1 and the heat extraction circulating system, described refrigeration unit 1 comprises compressor 5, condenser 6, expansion valve 7 and the evaporimeter 8 that is communicated with the formation loop successively; The described heat extraction circulating system comprises four radiators 3, the coolant outlet of described condenser 6 and cooling water inlet are communicated with radiator 3 respectively and form heat-radiation loop, during use, the compressed machine of cold-producing medium is compressed into high temperature and high pressure steam and enters condenser, carry out in condenser, being condensed into liquid refrigerant after the interchange of heat with cooling water, and be that the refrigerant liquid of low-temp low-pressure is as system's low-temperature receiver through the expansion valve step-down, the cooling water that has carried out interchange of heat with high-temperature high-pressure refrigerant in the condenser is transported to the radiator that is arranged at return airway and dispels the heat, and by returnairshaft heat is discharged at last.Simultaneously, system also is provided with and radiator anti-explosion part ventilating fan 4 one to one, and to be formed for the distinguished and admirable of interchange of heat refrigeration, this system is applied widely, refrigeration modes that can be different according to the actual conditions choose reasonable.
In the present embodiment, the evaporimeter 8 of described two refrigeration unit 1 is communicated with expansion valve 7 and compressor 5 by adiabatic metal hose, and be arranged at the coal mine excavation work plane and form the direct-cooling type cooling cycle system, the direct-cooling type cooling cycle system is applicable to the nearer job site of cold conveying, cold damage is little, heat exchange efficiency is high, need not pump, water charging system and water treatment system etc.; A remaining refrigeration unit 1 also comprises air cooler 2, the chilled water outlet of described evaporimeter 8 and chilled water inlet are communicated with three air coolers 2 respectively by the heat-insulation and heat-preservation pipeline and form the water cooled refrigeration circulating system, the water cooled refrigeration circulating system is applicable to remote conveying refrigerating medium, safe and reliable, can carry out cold medium supply to a plurality of job sites of heat evil that exist simultaneously.
In the present embodiment, flow direction along chilled water between the chilled water inlet of described air cooler 2 and evaporimeter 8 is disposed with hydrotreater 9 and expansion tank 10, described expansion tank 10 is provided with filling pipe 11 and blow-off pipe 12, be provided for controlling the float valve 13 of automatic water supplement on the filling pipe 11, to guarantee that water can continually enter evaporimeter and carry out interchange of heat, simultaneously water is handled, also helped improving the application life of the water cooled refrigeration circulating system.
In the present embodiment, be provided with used heat use device 14 between described condenser 6 and the radiator 3, used heat is utilized once more by modes such as generatings, help improving the economy of system, reduce its running cost.
In the present embodiment, be provided with soaking type heat exchanger 15 between described used heat use device 14 and the radiator 3, can be according to actual conditions, as low-temperature receiver water, further improve the thermal discharge efficiency of system by underground water or other water sources, cut down the consumption of energy.
In the present embodiment, be disposed with hydrotreater 9 and expansion tank 10 along the cooling-water flow direction between the coolant outlet of described condenser 6 and the radiator 3, described expansion tank 10 is provided with filling pipe 11 and blow-off pipe 12, be provided for controlling the float valve 13 of automatic water supplement on the filling pipe 11, to guarantee that water can continually enter condenser and carry out interchange of heat, simultaneously water is handled, also helped improving heat extraction circulating system application life.
In the present embodiment, described radiator 3 is provided with water spray system 16, with the radiating efficiency of further raising radiator.
In the present embodiment, be provided with high-low pressure conversion equipment 17 between described condenser 6 and the radiator 3, when year cold water drop in the cooling water recirculation system and the water cooled refrigeration circulating system is big, the high-low pressure conversion equipment can be realized the pressure conversion on the one hand, reduce the loss of energy, avoid cooling water and year cold water temperature rise in cyclic process excessive; Play the effect that energy reclaims on the other hand, reduce the energy consumption of whole system.
In the present embodiment, the medium inlet of described air cooler 2, radiator 3, condenser 6 and evaporimeter 8 and media outlet place are provided with thermometer, pressure gauge, flow meter and multiple conventional valve, so that the operating condition of monitoring system and system is regulated and control according to this situation at any time.
The local refrigeration cool-down of the heat evil mine system of present embodiment adopts the direct-cooling type cooling cycle system and the water cooled refrigeration circulating system to use simultaneously, and separate refrigeration is concentrated heat extraction, and is applied widely.
Embodiment 2:
Fig. 5 is the local refrigeration cool-down system principle of the heat evil mine schematic diagram that is applicable to the long-distance transmissions refrigerant, as shown in the figure: the local refrigeration cool-down of the heat evil mine system of present embodiment, comprise the refrigeration unit 1 and the heat extraction circulating system, described refrigeration unit 1 comprises compressor 5, condenser 6, expansion valve 7 and the evaporimeter 8 that is communicated with the formation loop successively; The described heat extraction circulating system comprises four radiators 3, the coolant outlet of described condenser 6 and cooling water inlet are communicated with radiator 3 respectively and form heat-radiation loop, during use, the compressed machine of cold-producing medium is compressed into high temperature and high pressure steam and enters condenser, carry out in condenser, being condensed into liquid refrigerant after the interchange of heat with cooling water, and be that the refrigerant liquid of low-temp low-pressure is as system's low-temperature receiver through the expansion valve step-down, the cooling water that has carried out interchange of heat with high-temperature high-pressure refrigerant in the condenser is transported to the radiator that is arranged at return airway and dispels the heat, simultaneously, system also is provided with and radiator anti-explosion part ventilating fan 4 one to one, be used for the distinguished and admirable of interchange of heat refrigeration with manufacturing, this system is applied widely, refrigeration modes that can be different according to the actual conditions choose reasonable.
In the present embodiment, described refrigeration unit 1 also comprises the air cooler 2 of three groups of parallel connections, the chilled water outlet of described evaporimeter 8 and chilled water inlet are communicated with air cooler 2 respectively by the heat-insulation and heat-preservation pipeline and form the water cooled refrigeration circulating system, the water cooled refrigeration circulating system is applicable to remote conveying refrigerating medium, safe and reliable, can carry out cold medium supply to a plurality of job sites of heat evil that exist simultaneously.
In the present embodiment, flow direction along chilled water between the chilled water inlet of described air cooler 2 and evaporimeter 8 is disposed with hydrotreater 9 and expansion tank 10, described expansion tank 10 is provided with filling pipe 11 and blow-off pipe 12, be provided for controlling the float valve 13 of automatic water supplement on the filling pipe 11, to guarantee that water can continually enter evaporimeter and carry out interchange of heat, simultaneously water is handled, also helped improving the application life of the water cooled refrigeration circulating system.
In the present embodiment, be provided with used heat use device 14 between described condenser 6 and the radiator 3, used heat is utilized once more by modes such as generatings, help improving the economy of system, reduce its running cost.
In the present embodiment, be provided with soaking type heat exchanger 15 between described used heat use device 14 and the radiator 3, can be according to actual conditions, as low-temperature receiver water, further improve the thermal discharge efficiency of system by underground water or other water sources.
In the present embodiment, be disposed with hydrotreater 9 and expansion tank 10 along the cooling-water flow direction between the coolant outlet of described condenser 6 and the radiator 3, described expansion tank 10 is provided with filling pipe 11 and blow-off pipe 12, be provided for controlling the float valve 13 of automatic water supplement on the filling pipe 11, to guarantee that water can continually enter condenser and carry out interchange of heat, simultaneously water is handled, also helped improving the application life of the heat extraction circulating system.
In the present embodiment, described radiator 3 is provided with water spray system 16, with the radiating efficiency of further raising radiator.
In the present embodiment, between described condenser 6 and the radiator 3, be respectively arranged with high-low pressure conversion equipment 17 between evaporimeter 8 and the air cooler 2, when year cold water drop in the cooling water recirculation system and the water cooled refrigeration circulating system is big, the high-low pressure conversion equipment can be realized the pressure conversion on the one hand, reduce the loss of energy, avoid cooling water and year cold water temperature rise in cyclic process excessive; Play the effect that energy reclaims on the other hand, reduce the energy consumption of whole system.
In the present embodiment, the medium inlet of described air cooler 2, radiator 3, condenser 6 and evaporimeter 8 and media outlet place are provided with thermometer, pressure gauge, flow meter and multiple conventional valve, so that the operating condition of monitoring system is also according to circumstances regulated and control system at any time.
The local refrigeration cool-down of the heat evil mine system of present embodiment adopts the water cooled refrigeration circulating system, and is provided with two high-low pressure conversion equipments, is applicable to that the discrepancy in elevation surpasses 100 meters deep-well.
Explanation is at last, above embodiment is only unrestricted in order to the explanation the technical solution of the utility model, although the utility model is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement the technical solution of the utility model, and not breaking away from the aim and the scope of technical solutions of the utility model, it all should be encompassed in the middle of the claim scope of the present utility model.
Claims (10)
1. a heat does harm to the local refrigeration cool-down of mine system, it is characterized in that: comprise the refrigeration unit (1) and the heat extraction circulating system, described refrigeration unit (1) comprises compressor (5), condenser (6), expansion valve (7) and the evaporimeter (8) that is communicated with the formation loop successively; The described heat extraction circulating system comprises at least one radiator (3), and the coolant outlet of described condenser (6) and cooling water inlet are communicated with radiator (3) respectively and form heat-radiation loop.
2. the local refrigeration cool-down of heat evil mine according to claim 1 system, it is characterized in that: described evaporimeter (8) is arranged at the coal mine excavation work plane and forms the direct-cooling type cooling cycle system.
3. the local refrigeration cool-down of heat evil mine according to claim 1 system, it is characterized in that: described refrigeration unit (1) also comprises air cooler (2), and the chilled water outlet of described evaporimeter (8) and chilled water inlet are communicated with air cooler (2) respectively and form the water cooled refrigeration circulating system.
4. the local refrigeration cool-down of heat evil mine according to claim 3 system is characterized in that: be connected with at least two air coolers (2) on the described evaporimeter (8), be connected by the heat-insulation and heat-preservation pipeline between evaporimeter (8) and the air cooler (2).
5. the local refrigeration cool-down of heat evil mine according to claim 4 system, it is characterized in that: the flow direction along chilled water between the chilled water inlet of described air cooler (2) and evaporimeter (8) is disposed with hydrotreater (9) and expansion tank (10), described expansion tank (10) is provided with filling pipe (11) and blow-off pipe (12), is provided for controlling the float valve (13) of automatic water supplement on the filling pipe (11).
6. the local refrigeration cool-down of heat evil mine according to claim 5 system is characterized in that: be provided with used heat use device (14) between described condenser (6) and the radiator (3).
7. the local refrigeration cool-down of heat evil mine according to claim 6 system is characterized in that: be provided with soaking type heat exchanger (15) between described used heat use device (14) and the radiator (3).
8. the local refrigeration cool-down of heat evil mine according to claim 7 system, it is characterized in that: be disposed with hydrotreater (9) and expansion tank (10) along the cooling-water flow direction between the coolant outlet of described condenser (6) and the radiator (3), described expansion tank (10) is provided with filling pipe (11) and blow-off pipe (12), is provided for controlling the float valve (13) of automatic water supplement on the filling pipe (11).
9. the local refrigeration cool-down of heat evil mine according to claim 8 system, it is characterized in that: described radiator (3) is provided with water spray system (16).
10. the local refrigeration cool-down of heat evil mine according to claim 9 system is characterized in that: between described condenser (6) and the radiator (3), be respectively arranged with high-low pressure conversion equipment (17) between evaporimeter (8) and the air cooler (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200920206967 CN201627598U (en) | 2009-11-03 | 2009-11-03 | Heat damage mine local refrigerating and cooling system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200920206967 CN201627598U (en) | 2009-11-03 | 2009-11-03 | Heat damage mine local refrigerating and cooling system |
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| CN201627598U true CN201627598U (en) | 2010-11-10 |
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| CN 200920206967 Expired - Lifetime CN201627598U (en) | 2009-11-03 | 2009-11-03 | Heat damage mine local refrigerating and cooling system |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102080564A (en) * | 2010-12-30 | 2011-06-01 | 姜玉贵 | Method for preventing and controlling heat hazard of mine |
| CN102733840A (en) * | 2012-07-12 | 2012-10-17 | 北京矿大节能科技有限公司 | Mine underground cooling and waste heat recycling system |
| CN102900456A (en) * | 2012-09-25 | 2013-01-30 | 方齐 | Pneumatic/hydraulic local air conditioning unit for mines |
| CN104005783A (en) * | 2014-06-10 | 2014-08-27 | 北京中煤矿山工程有限公司 | Pneumatic refrigeration device and method for mine |
| CN105386785A (en) * | 2015-11-26 | 2016-03-09 | 中国矿业大学 | Cooling system for water film plate heat exchanger attached to high-temperature mine laneway wall surface |
| CN106761886A (en) * | 2017-01-04 | 2017-05-31 | 中国矿业大学 | A kind of mine return air radiating working face Local Air-cooling System |
| CN108286454A (en) * | 2018-01-30 | 2018-07-17 | 湖南科技大学 | A kind of local cooling's method of high-temperature mine |
| CN110332004A (en) * | 2019-08-09 | 2019-10-15 | 王德明 | Coal mining cooling system with the heat exchange of high-voltage secondary cooling water |
| CN111058888A (en) * | 2019-12-14 | 2020-04-24 | 西安科技大学 | Mine evaporative cooling device and method |
| CN112145218A (en) * | 2020-09-30 | 2020-12-29 | 辽宁工程技术大学 | System and method for treating thermal damage of underground coal face |
-
2009
- 2009-11-03 CN CN 200920206967 patent/CN201627598U/en not_active Expired - Lifetime
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102080564B (en) * | 2010-12-30 | 2012-11-21 | 姜玉贵 | Method for preventing and controlling heat hazard of mine |
| CN102080564A (en) * | 2010-12-30 | 2011-06-01 | 姜玉贵 | Method for preventing and controlling heat hazard of mine |
| CN102733840A (en) * | 2012-07-12 | 2012-10-17 | 北京矿大节能科技有限公司 | Mine underground cooling and waste heat recycling system |
| CN102900456A (en) * | 2012-09-25 | 2013-01-30 | 方齐 | Pneumatic/hydraulic local air conditioning unit for mines |
| CN104005783A (en) * | 2014-06-10 | 2014-08-27 | 北京中煤矿山工程有限公司 | Pneumatic refrigeration device and method for mine |
| CN105386785B (en) * | 2015-11-26 | 2017-07-04 | 中国矿业大学 | High-temperature mine tunnel wall attaches moisture film plate heat exchanger cooling system |
| CN105386785A (en) * | 2015-11-26 | 2016-03-09 | 中国矿业大学 | Cooling system for water film plate heat exchanger attached to high-temperature mine laneway wall surface |
| CN106761886A (en) * | 2017-01-04 | 2017-05-31 | 中国矿业大学 | A kind of mine return air radiating working face Local Air-cooling System |
| CN108286454A (en) * | 2018-01-30 | 2018-07-17 | 湖南科技大学 | A kind of local cooling's method of high-temperature mine |
| CN110332004A (en) * | 2019-08-09 | 2019-10-15 | 王德明 | Coal mining cooling system with the heat exchange of high-voltage secondary cooling water |
| CN111058888A (en) * | 2019-12-14 | 2020-04-24 | 西安科技大学 | Mine evaporative cooling device and method |
| CN111058888B (en) * | 2019-12-14 | 2022-03-15 | 西安科技大学 | Mine evaporative cooling device and method |
| CN112145218A (en) * | 2020-09-30 | 2020-12-29 | 辽宁工程技术大学 | System and method for treating thermal damage of underground coal face |
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Owner name: CHINA COAL TECHNOLOGY ENGINEERING GROUP CHONGQING Free format text: FORMER NAME: CHINA COAL SCIENCE AND INDUSTRY GROUP CHONGQING RESEARCH INSTITUTE Owner name: CHINA COAL SCIENCE AND INDUSTRY GROUP CHONGQING RE Free format text: FORMER NAME: COAL SCIENTIFIC RESEARCH INSTITUTE CHONGQING INSTITUTE |
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Address after: 400037, No. three village, 55 bridge, Shapingba District, Chongqing Patentee after: Chongqing Research Institute of China Coal Technology & Engineering Group Corp. Address before: 400037, No. three village, 55 bridge, Shapingba District, Chongqing Patentee before: Chongqing Institute of Coal Science Research Institute |
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Address after: 400039 Chongqing Jiulongpo Branch City Road No. 6 Patentee after: CHONGQING RESEARCH INSTITUTE CO., LTD. OF CHINA COAL TECHNOLOGY & ENGINEERING Group Address before: 400037, No. three village, 55 bridge, Shapingba District, Chongqing Patentee before: Chongqing Research Institute of China Coal Technology & Engineering Group Corp. |
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Granted publication date: 20101110 |
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