CN103603648A - Underground gasification device - Google Patents
Underground gasification device Download PDFInfo
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- CN103603648A CN103603648A CN201310627030.0A CN201310627030A CN103603648A CN 103603648 A CN103603648 A CN 103603648A CN 201310627030 A CN201310627030 A CN 201310627030A CN 103603648 A CN103603648 A CN 103603648A
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Abstract
The invention relates to an underground gasification device which comprises a gas inlet channel, a gasification channel and a gas outlet channel, wherein the gas inlet channel, the gasification channel and the gas outlet channel are communicated in sequence. The underground gasification device further comprises a pipe communicated with the inner portion of the underground gasification device, a first port of the pipe stretches out of the ground, and a second port of the pipe is located in the gasification channel. A high-pressure fluid purging device is connected to the second port and used for removing accumulated dust generated by gasification of an underground coal layer. The part, stretching out of the ground, of the pipe is connected with a dragging device, and the dragging device is used for dragging the pipe to enable the high-pressure fluid purging device to move. According to the underground gasification device, the pipe with the high-pressure fluid purging device is communicated with the inner portion of the underground gasification device, high-pressure fluid is sprayed out for removing accumulated dust on the gasification working surface of the coal layer, a fresh coal layer is exposed to make full contact with a gasification agent, the gasification efficiency and the quality of coal gas are improved, the purpose that the high-pressure fluid purging device moves along with movement of the gasification working surface is achieved through the dragging device on the ground, and the underground gasification device completely meets the requirements of underground gasification of the coal layer.
Description
Technical field
The present invention relates to coal underground gasification technology field, be specifically related to a kind of underground gasification device.
Background technology
Underground coal gasification(UCG) is a kind of new technology cutting coal, first from earth's surface along coal seam digging two tunnels---inlet channel and outlet passageway, then in coal seam on the lower for portion an entry (being gasification tunnel) inlet channel and outlet passageway are coupled together, by the whole coal body that tunnel surrounded, the region that will gasify exactly, be referred to as the panel of gasifying, or claim underground gasification device; Afterwards by inlet channel to coal seam conveying gas agent and light coal seam and make it to carry out combustion gasification, from outlet passageway, discharging combustion gasification gas is coal gas.
In Underground Coal Gasification Process, on gasification face, can adhere to coal ash, carrying out along with burning, coal ash thickness is increasing, while reaching certain thickness, under the effect of gravity, can automatically peel off skin, carry out grieshoch attenuation, wait for that again running up to certain thickness peels off skin (Laboratory studies on combustion cavity growth in lignite coal blocks in the context of underground coal gasification, Sateesh Daggupati et al.Energy, 35 (2010): 2375-2386).In the combustion gasification process in coal seam, the coal ash thickness adhering on gasification face is relevant with coal characteristic.In combustion gasification process, due to the interval of coal ash, gasifying agent need to penetrate grieshoch or could contact and react with coal seam through grieshoch from the be full of cracks of grieshoch, makes coal seam insufficient with contacting of gasifying agent, affect the gasification efficiency in coal seam, finally affect gas quality.
Although prior art discloses a lot of underground gasification furnaces, as CN102562025A discloses a kind of coal underground gasifying furnace with cement stone ring, all do not solve gasification face and be attached with coal ash, affect the problem of gasification efficiency.
Summary of the invention
For the deficiencies in the prior art, the object of the present invention is to provide a kind of underground gasification device, described underground gasification device comprises high-pressure fluid blow device, and described high-pressure fluid blow device can be removed the dust stratification being attached on coal seam gasification work plane, and can realize along with the movement of dust stratification face and moving, solved the coal seam gasification efficiency causing due to grieshoch accumulation low, the problem that gas quality is poor.
The invention provides a kind of underground gasification device, comprise the inlet channel, gasification tunnel and the outlet passageway that are communicated with successively, described underground gasification device also comprises the pipeline passing into wherein, and the first port of described pipeline elevates above the soil, and the second port is arranged in gasification tunnel; Described the second port is connected with high-pressure fluid blow device, the dust stratification producing for removing subterranean coal gasification; Described pipeline elevates above the soil and is partly connected with towing device.
Preferably, described high-pressure fluid blow device comprises that the fluid that surface has a gas outlet enters pipe, and is arranged on fluid and enters the some fluid ejection apparatus on pipe gas outlet.
Preferably, described fluid ejection apparatus is the inner cylinder that has conical surface helix fluid course;
Described fluid ejection apparatus is limited to fluid by baffle ring and enters pipe above, to prevent that fluid ejection apparatus from departing from fluid and entering pipe.
Preferably, described fluid course originates in the center of circle, fluid ejection apparatus cylinder bottom surface, ends at fluid ejection apparatus cylinder near the sidewall of end face.
Preferably, angle >=30 ° of the tangent line of described fluid course and sidewall joining and fluid ejection apparatus cylinder bottom surface.
Preferably, the spiral number of turns of described fluid course is 1/4～5 circle.
Preferably, the diameter of described fluid course is 0.08～0.3 times of fluid ejection apparatus cylinder height.
Preferably, described fluid enters the air intake of pipe and the second port of pipeline is connected.
Preferably, described fluid enters the air outlet of pipe and shuts, or connects a fluid ejection apparatus.
Preferably, described underground gasification furnace is connected with monitoring device, and described monitoring device comprises the coal gas measurement mechanism that is arranged at outlet passageway gas outlet, for monitoring the content of outlet passageway output coal gas active ingredient.
Preferably, described underground gasification furnace is connected with control device, for controlling startup and the towing device of high-pressure fluid blow device, pulls distance.
Preferably, described pipeline is provided with and prevents that the second port of pipeline from imbedding the bracing or strutting arrangement of grieshoch near the second port;
Described bracing or strutting arrangement is the gripper shoe being articulated and connected with pipe wall, and described gripper shoe is 20 ° with upper angle with conduit axis in pulling process;
Or described bracing or strutting arrangement is to be enclosed within pipeline near the support set of the second port, described support set is large away from the thickness of the second port near the Thickness Ratio of the second port.
Second aspect present invention provides a kind of using method of the underground gasification device as described in first aspect, and described method comprises the steps:
(1) descend gasification installation preparatively: pipeline is put into gasification tunnel, and the second port that is connected with the pipeline of high-pressure fluid blow device is positioned near ignition point; Pipeline the first port connects towing device;
(2) igniting gasification coal seam: inlet channel injected gas agent; The junction igniting of outlet passageway and gasification tunnel, carries out the gasification in coal seam;
(3) start high-pressure fluid blow device, the dust stratification adhering on coal seam rib in gasification is removed;
(4) pull high-pressure fluid blow device.
Preferably, the process of the described startup high-pressure fluid of step (3) blow device is: in coal gas, the content summation of active principle reaches more than 15% or carbon dioxide content reaches 20% when above, starts high-pressure fluid blow device.
Preferably, the process that pulls high-pressure fluid blow device described in step (4) is: in coal gas, the content summation of active principle declines more than 15% or when certain single active principle content decline 20% is above, pulls high-pressure fluid blow device.
Preferably, in described coal gas, the content of active principle or the content data of carbon dioxide obtain by monitoring device.
Compared with prior art, the present invention has following beneficial effect:
The present invention by passing into the pipeline that is provided with high-pressure fluid blow device in underground gasification device, ejection high-pressure fluid (as gases at high pressure, ash cleaning agent or be suspended with gas or the liquid of lightweight grit) is removed the dust stratification of coal seam gasification work plane, exposing fresh coal seam fully contacts with gasifying agent, improve the quality of gasification efficiency and coal gas, and realize by the towing device on ground the object that high-pressure fluid blow device moves with the movement of gasification face, be suitable for the needs of coal layer underground gasifying completely.
Accompanying drawing explanation
Fig. 1 is the structural representation of underground gasification device provided by the invention;
The structural representation of the high-pressure fluid blow device 6 that Fig. 2 provides for embodiment 1; The cross-sectional view along fluid ejection apparatus 62 cylinder axial planes that in the high-pressure fluid blow device 6 that in the high-pressure fluid blow device 6 that Fig. 3 provides for embodiment 1, structural representation Fig. 4 of fluid ejection apparatus 62 provides for embodiment 1, fluid ejection apparatus 62 and baffle ring 63 coordinate, the structural representation of the high-pressure fluid blow device 6 that Fig. 5 provides for embodiment 2;
Fig. 6 is the structural representation of gripper shoe 43;
Fig. 7 is the structural representation of support set 44;
Wherein, 1-inlet channel; 2-gasification tunnel; 3-outlet passageway; 4-pipeline; 5-towing device; 6-high-pressure fluid blow device; 7-coal seam;
41-the first port, 42-the second port, 43-gripper shoe, 431-connecting axle, 432-swivel plate, 44-support set;
61-fluid enters pipe, 611-air intake, 612-air outlet;
62-fluid ejection apparatus, 621-projection, 622-fluid course;
63-baffle ring, 631-ring is prominent; 71-dust stratification layer.
The specific embodiment
Next, with reference to accompanying drawing in detail, the specific embodiment of the present invention is described in detail.In description of the invention, term " first " " second " etc. is used for parts and another component region to separate, and described parts are not defined by above-mentioned term.
As shown in Fig. 1 (Fig. 1 is the structural representation of underground gasification device provided by the invention), the invention provides a kind of underground gasification device, comprise the inlet channel 1, gasification tunnel 2 and the outlet passageway 3 that are communicated with successively, described underground gasification device also comprises the pipeline 4 passing into wherein, the first port 41 of described pipeline 4 elevates above the soil, and the second port 42 is arranged in gasification tunnel 2; Described the second port 42 is connected with high-pressure fluid blow device 6, the dust stratification producing for removing subterranean coal 7 gasifications; Described pipeline 4 elevates above the soil and is partly connected with towing device 5, for pulling pipeline 4, high-pressure fluid blow device 6 is moved.
The present invention removes by the dust stratification layer 71 of 6 pairs of underground gasification installation gasification faces of high-pressure fluid blow device, and can pull pipeline 4 by towing device 5, make the high-pressure fluid blow device 6 that the connects position in dust stratification layer 71 all the time, make thus the dust stratification layer 71 of coal seam gasification work plane to be removed in time, improved the contact area in gasifying agent and coal seam, improve gasification efficiency, guaranteed the quality of coal gas.
The operating principle of underground gasification device provided by the invention is:
Underground gasification device provided by the invention is set up and can be moved and mobile high-pressure fluid blow device 6 with gasification face, the dust stratification layer 71 that utilizes high-pressure fluid blow device 6 to remove on gasification face, make dust stratification layer 71 depart from time gasification face, expose fresh coal seam, increase contacts with gasifying agent, improves gasification efficiency and gas quality.
In order to make object of the present invention, technical scheme and advantage are clearer, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
The underground gasification device providing in conjunction with Fig. 2～4 couple embodiment 1 is elaborated, described underground gasification device comprises inlet channel 1, gasification tunnel 2 and the outlet passageway 3 being communicated with successively, and pass into the pipeline 4 among underground gasification device, the first port 41 of described pipeline 4 elevates above the soil and is connected with towing device 5, and the second port 42 is arranged in gasification tunnel 2 and is connected with high-pressure fluid blow device 6;
Wherein, high-pressure fluid blow device 6 comprises that the fluid that air outlet 612 is shut enters pipe 61, some fluid ejection apparatus 62 and baffle ring 63; The first port 41 of pipeline 4 is connected with fluid storage device (accompanying drawing is not shown), and described fluid storage device can be air compressor, deashing agent front pump or the blast fan that is suspended with solid granule etc.;
The air intake 611 that described fluid enters pipe 61 is connected with the second port 42 of pipeline 4;
The cylindrical inside of described fluid ejection apparatus 62 has conical surface helix fluid course 622; Described conical surface helix fluid course 622 originates in fluid ejection apparatus 62 centers of circle, cylinder bottom surface, end on the sidewall of fluid ejection apparatus 62 near cylinder end face, and with the tangent line of sidewall joining and angle >=30 ° of fluid ejection apparatus 62 cylinder bottom surfaces, the spiral number of turns of described fluid course 622 does not limit, be preferably 1/4～5 circle, more preferably 1/4～3/4 circle, further preferably 1/2～3/4 encloses; The diameter of described fluid course 622 does not limit, and is preferably 0.08～0.3 times of fluid ejection apparatus 62 cylinder height;
The axis that described some fluid ejection apparatus 62 enter pipe 61 along fluid is uniform, and being only distributed in fluid enters on the upper half of managing 61 contours, being preferably distributed in fluid enters on pipe upper 1/3 week of 61 contours, fluid enters distribute on the 61 position perforate of fluid ejection apparatus 62 of pipe, guarantees that fluid can enter the fluid course 622 that pipe 61 enters fluid ejection apparatus 62 from fluid;
The quantity of described fluid ejection apparatus 62 does not limit;
In described high-pressure fluid blow device 6, all parts is made by withstand voltage, exotic material, and described withstand voltage exotic material the present invention does not limit, and typical but non-limiting have stainless steel, alloy, a composite material etc.; Prominent 631 faces that are in contact with one another of described projection 621 and ring are wear-resisting smooth flat.
The structural representation of the high-pressure fluid blow device 6 that Fig. 2 provides for embodiment 1;
The structural representation of fluid ejection apparatus 62 in the high-pressure fluid blow device 6 that Fig. 3 provides for embodiment 1, in Fig. 3, the spiral number of turns of the cylindro-conical helix of fluid course 622 is 3 circles;
The cross-sectional view along fluid ejection apparatus 62 cylinder axial planes that in the high-pressure fluid blow device 6 that Fig. 4 provides for embodiment 1, fluid ejection apparatus 62 and baffle ring 63 coordinate, in Fig. 4, the spiral number of turns of the cylindro-conical helix of fluid course 622 is 0.5 circle.
The course of work of the underground gasification device that embodiment 1 provides is:
(1) descend gasification installation preparatively:
(2) igniting gasification coal seam 7:
(3) start high-pressure fluid blow device 6:
Gasification along with coal seam 7, gasification face is constantly expanded, while expanding to high-pressure fluid blow device 6 position, logical if fluid is (as compressed air to pipeline 4, the granule of deashing agent and/or suspension), fluid enters by fluid the gas outlet arranging on pipe 61 and enters fluid ejection apparatus 62, and fluid ejection apparatus 62 cylinders are promoted, space between projection 621 and ring prominent 631 is disappeared, fluid enters fluid course 622, in the spiral helicine pipe passage of conical surface high speed, flow, finally from the opening of fluid ejection apparatus 62 sidewalls, spray, emission direction is for obliquely, in the process of fluid course 622 operation, fluid ejection apparatus 62 is done and is rotated under the opposition of fluid, to guarantee that any direction is all in the scope of the injection of fluid, spray fluid and act on gasification face, the coal ash adhering to is removed, remove dust stratification layer 71, expose fresh coal seam 7 and contact with gasifying agent, gasify,
(4) pull high-pressure fluid blow device 6:
This step is by the gasify changes of contents of active principle of coal gas of output of monitoring, judges whether the fluid that high-pressure fluid blow device 6 sprays can also be applied to dust stratification layer 71, and in the time of conventionally can being applied to, the active principle content of coal gas is stable; And effect is not then, due to the obstruction of dust stratification layer 71, in coal gas, the content of active principle can obviously decline; Therefore need to monitor the active principle (H of coal gas
2, CO, CH
4), when the summation of active principle declines more than 15%, or certain single active principle declines while surpassing 20%, by towing device 5, pull high-pressure fluid blow device 6 to gasification face, proceed deashing, until the second port 42 of pipeline 4 arrives the junction of inlet channel 1 and gasification tunnel 2, quit work, and finish gasification.
In embodiment 1, the startup of high-pressure fluid blow device 6 is carried out after receiving enabling signal, and described enabling signal can come from the real-time monitoring in gasification tunnel 2 etc.
Typical but non-limiting at the fluid described in embodiment 1 can be the granule of compressed air, deashing agent and/or suspension, or gasifying agent, steam, or carry gasifying agent or the steam of lightweight grit, can be also catalyzer of cheap gas shift reaction etc.
In embodiment 1, described high-pressure fluid blow device 6 is to be connected with the second port 42 of pipeline 4 by screw thread, also can connect by shaft coupling, or pin connects, or connect etc. by the female adapter sleeve of tool, the present invention is not specifically limited, and any mode that both can be connected all can be used for the present invention.
On the basis of embodiment 1, make following change: fluid enters pipe 621 and do not arrange and shut end, but at air outlet 612, a fluid ejection apparatus 62 is set.
The structural representation of the high-pressure fluid blow device 6 that Fig. 5 provides for embodiment 2.
On the basis of embodiment 1 or embodiment 2, make following change: at pipeline 4, near the second port 42 places, gripper shoe 43 is set, described gripper shoe comprises and being fixed near the connecting axle 431 at pipeline 4 second port 42 places with around the swivel plate 432 of connecting axle 431 rotations, and its structure and hinge are similar; Described gripper shoe 43 is 20 ° with upper angle with pipeline 4 axis in pulling process.
Fig. 6 is the structural representation of gripper shoe 43.
The underground gasification furnace that embodiment 2 provides, in the process of work, can prevent that the second port 42 of pipeline 4 from imbedding grieshoch.
On the basis of embodiment 1 or embodiment 2, make following change: at pipeline 4, near the second port 42 places, support set 44 is set, described support set 44 is enclosed within pipeline 4 near the second port 42 places, and described support set is large away from the thickness of the second port near the Thickness Ratio of the second port.
Fig. 7 is the structural representation of support set 44.
The underground gasification furnace that embodiment 3 provides, in the process of work, can prevent that the second port 42 of pipeline 4 from imbedding grieshoch.
Applicant's statement, the present invention illustrates detailed process equipment and process flow process of the present invention by above-described embodiment, but the present invention is not limited to above-mentioned detailed process equipment and process flow process, do not mean that the present invention must rely on above-mentioned detailed process equipment and process flow process and could implement.Person of ordinary skill in the field should understand, any improvement in the present invention, to the selection of the interpolation of the equivalence replacement of each raw material of product of the present invention and auxiliary element, concrete mode etc., within all dropping on protection scope of the present invention and open scope.
Claims (17)
1. a underground gasification device, comprise the inlet channel (1), gasification tunnel (2) and the outlet passageway (3) that are communicated with successively, it is characterized in that, described underground gasification device also comprises the pipeline (4) passing into wherein, first port (41) of described pipeline (4) elevates above the soil, and the second port (42) is arranged in gasification tunnel (2); Described the second port (42) is connected with high-pressure fluid blow device (6), the dust stratification producing for removing subterranean coal (7) gasification; Described pipeline (4) elevates above the soil and is partly connected with towing device (5).
2. underground gasification device as claimed in claim 1, it is characterized in that, described high-pressure fluid blow device (6) comprises that the fluid that surface has a gas outlet enters pipe (61), and is arranged on fluid and enters the some fluid ejection apparatus (62) on pipe (61) gas outlet.
3. underground gasification device as claimed in claim 2, is characterized in that, described fluid ejection apparatus (62) has the cylinder of conical surface helix fluid course (622) for inside;
Described fluid ejection apparatus (62) is limited to fluid by baffle ring (63) and enters pipe (61) above, to prevent that fluid ejection apparatus (62) from departing from fluid and entering pipe (61).
4. underground gasification device as claimed in claim 3, is characterized in that, described fluid course (622) originates in the center of circle, fluid ejection apparatus (62) cylinder bottom surface, ends at fluid ejection apparatus (62) cylinder near the sidewall of end face.
5. underground gasification device as claimed in claim 3, is characterized in that, described fluid course (622) and the tangent line of sidewall joining and angle >=30 ° of fluid ejection apparatus (62) cylinder bottom surface.
6. underground gasification device as claimed in claim 3, is characterized in that, the spiral number of turns of described fluid course (622) is 1/4～5 circle.
7. underground gasification device as claimed in claim 3, is characterized in that, the diameter of described fluid course (622) is 0.08～0.3 times of fluid ejection apparatus (62) cylinder height.
8. underground gasification device as claimed in claim 2, is characterized in that, described fluid enters the air intake (611) of pipe (61) and second port (42) of pipeline (4) is connected.
9. underground gasification device as claimed in claim 2, is characterized in that, described fluid enters the air outlet (612) of pipe (61) and shuts, or connects a fluid ejection apparatus (62).
10. underground gasification furnace as claimed in claim 1, it is characterized in that, described underground gasification furnace is connected with monitoring device, and described monitoring device comprises the coal gas measurement mechanism that is arranged at outlet passageway (3) gas outlet, for monitoring the content of outlet passageway (3) output coal gas active ingredient.
11. underground gasification furnaces as claimed in claim 1, is characterized in that, described underground gasification furnace is connected with control device, for controlling startup and the towing device (5) of high-pressure fluid blow device (6), pull distance.
12. underground gasification devices as claimed in claim 1, is characterized in that, described pipeline (4) is located to be provided with near the second port (42) and prevented that second port (42) of pipeline (4) from imbedding the bracing or strutting arrangement of grieshoch.
13. underground gasification device as claimed in claim 10, is characterized in that, described bracing or strutting arrangement is the gripper shoe (43) being articulated and connected with pipeline (4) tube wall, and described gripper shoe (43) is 20 ° with upper angle with pipeline (4) axis in pulling process;
Or, the support set (44) that described bracing or strutting arrangement is located near the second port (42) for being enclosed within pipeline (4), the thickness that the Thickness Ratio that described support set (44) is located near the second port (42) is located away from the second port (42) is large.
The using method of 14. 1 kinds of underground gasification devices as described in one of claim 1～13, is characterized in that, described method comprises the steps:
(1) descend gasification installation preparatively: pipeline (4) is put into gasification tunnel (2), and the second port (42) that is connected with the pipeline (4) of high-pressure fluid blow device (6) is positioned near ignition point; Pipeline (4) first ports (41) connect towing device (5);
(2) igniting gasification coal seam (7): inlet channel (1) injected gas agent; Outlet passageway (3) is lighted a fire with the junction of gasification tunnel (2), carries out the gasification of coal seam (7);
(3) start high-pressure fluid blow device (6), the dust stratification adhering on the rib of coal seam in gasification (7) is removed;
(4) pull high-pressure fluid blow device (6).
15. methods as claimed in claim 14, it is characterized in that, the process of step (3) described startup high-pressure fluid blow device (6) is: in coal gas, the content summation of active principle reaches more than 15% or carbon dioxide content reaches 20% when above, starts high-pressure fluid blow device (6).
16. methods as claimed in claim 14, it is characterized in that, the process that pulls high-pressure fluid blow device (6) described in step (4) is: in coal gas, the content summation of active principle declines more than 15% or when certain single active principle content decline 20% is above, pulls high-pressure fluid blow device (6).
17. methods as described in claim 15 or 16, is characterized in that, in described coal gas, the content of active principle or the content data of carbon dioxide obtain by monitoring device.
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| CN201310627030.0A CN103603648B (en) | 2013-11-29 | 2013-11-29 | A kind of underground gasification device |
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| CN201310627030.0A CN103603648B (en) | 2013-11-29 | 2013-11-29 | A kind of underground gasification device |
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| CN103603648B CN103603648B (en) | 2016-06-01 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103603647A (en) * | 2013-11-29 | 2014-02-26 | 新奥气化采煤有限公司 | Underground gasifier and application method thereof |
| CN104389577A (en) * | 2014-09-26 | 2015-03-04 | 新奥气化采煤有限公司 | Multipoint gas injection underground gasification furnace and multipoint gas injection underground gasification method |
| CN117307123A (en) * | 2023-11-07 | 2023-12-29 | 中国矿业大学(北京) | Novel underground coal gasification channel and ash removal method |
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| CN103603647A (en) * | 2013-11-29 | 2014-02-26 | 新奥气化采煤有限公司 | Underground gasifier and application method thereof |
| CN103603647B (en) * | 2013-11-29 | 2016-05-25 | 新奥气化采煤有限公司 | A kind of underground gasification furnace and using method thereof |
| CN104389577A (en) * | 2014-09-26 | 2015-03-04 | 新奥气化采煤有限公司 | Multipoint gas injection underground gasification furnace and multipoint gas injection underground gasification method |
| CN104389577B (en) * | 2014-09-26 | 2017-10-27 | 新奥科技发展有限公司 | Multiple spot gas injection underground gasification furnace and multiple spot gas injection underground gasification method |
| CN117307123A (en) * | 2023-11-07 | 2023-12-29 | 中国矿业大学(北京) | Novel underground coal gasification channel and ash removal method |
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| Publication number | Publication date |
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| CN103603648B (en) | 2016-06-01 |
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Effective date of registration: 20170209 Address after: 065001 Hebei economic and Technological Development Zone, Langfang science and Technology Park in the Southern District of B building, room 522 Patentee after: ENN SCIENCE & TECHNOLOGY DEVELOPMENT Co.,Ltd. Address before: The 065001 Hebei economic and Technological Development Zone of Langfang Huaxiang Patentee before: ENN Coal Gasification Co., Ltd. |