CN104018820A - Coal underground gasification process system - Google Patents
Coal underground gasification process system Download PDFInfo
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- CN104018820A CN104018820A CN201410268371.8A CN201410268371A CN104018820A CN 104018820 A CN104018820 A CN 104018820A CN 201410268371 A CN201410268371 A CN 201410268371A CN 104018820 A CN104018820 A CN 104018820A
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Abstract
The invention relates to a coal underground gasification process system. The coal underground gasification process system comprises a gasification agent injection drill hole, coal gas outlet drill holes, a main gasification channel, branch gasification channels, a drill hole supporting tube, a gasification agent injection tube, a combustion agent injection tube, a sealing device and an ignition point shifter. The gasification agent injection drill hole is connected with the coal gas outlet drill holes through the main gasification channel and the branch gasification channels, and the combustion agent injection tube is sleeved with the gasification agent injection tube and is connected through the sealing device. A gasification process includes the steps of carrying out ignition, judging whether water vapor is fed into, feeding into water vapor, judging whether an ignition point is moved forward, starting the ignition point shifter and continuing to conduct combustion. The coal underground gasification process system has the advantages that the transverse gasification area and longitudinal gasification area can be enlarged, coal reserves for gasification are increased, autoignition and controllable back gas injection are achieved in a well-free coal underground gasification process, meanwhile the problem of short circuit of gasification agents in the gasification channels is solved, the probability of back mixing of product gas and the gasification agents is lowered, and safety operation of the gasification process is guaranteed.
Description
Technical field
The present invention relates to underground coal gasification(UCG) production field, particularly a kind of coal underground gasifying technology system.
Background technology
Coal underground gasification technology is recyclable manually can not exploit and exploit uneconomic coal resources, and people begin one's study very early.Underground coal gasification(UCG) is divided into has well formula and without well formula, there is well formula to utilize existing tunnel to carry out underground gasification process, the Chinese patent of publication number CN101315026B " a kind of underground coal gasification system and production technology thereof ", the Chinese patent of publication number CN1169501A " long-passage and large-section underground coal gasification in mine ", the Chinese patent of publication number CN201310327035.1 " injection point backing gas injection device in a kind of underground gasification system " etc. has been well formula coal underground gasification technology, the installation of need manually going into the well when device is installed, inconvenience is installed, safety problem cannot ensure, and install not recoverable.Without the underground coal gasification(UCG) of well formula, realized underground unattended, guarantee the safety of manufacturing process, " connection of the gasifying agent injection hole such as the Chinese patent of a kind of novel underground coal gasification furnace, publication number CN201110391186.4 " a kind of coal underground gasification method " and gas exit boring is straight line gasification tunnel and is connected the Chinese patent of publication number CN200810119351.9; gasify horizontal area and longitudinal area are all smaller; gasification of coal reserves are few, and coal seam utilization rate is low.The Chinese patent of publication number CN1112188A " gasifying method for coal seam " adopts the fusing method molten existing injection point backing of air injection pipe cause for gossip of opening piecemeal, but air injection pipe can not be burnt, cause gas still along obsolete air injection pipe to the coal seam gas injection of having burnt, when reducing coal seam utilization rate, to production, bring unsafe hidden danger.Coal ground down-firing is also an important research contents during underground coal gasification(UCG) is produced, the Chinese patent of publication number CN200810119355.7 " water-bearing coal seam water control igniter " adopts the electrically-fired mode coal seam of igniting, but it is suitable for the moisture less coal seam of superficial part, because no-shaft UCG is applied to coal seam, deep, the situations such as the occurrence status HTHP in coal seam, deep, infiltration have had a strong impact on electric ignition.The Chinese patent of publication number CN200820010590.6 " without well formula underground coal gasification ignition simulating device " adopts pyrophoric gas silane and oxygen catalytic combustion to reach the object of igniting, but, in this patent, silane and oxygen, air Injection are in same pipe, combustion inner pipe safety is poor, and burning position is uncontrollable.
Summary of the invention
The object of the invention is for narrow without well formula Underground Coal Gasification Process pneumatization, gasification efficiency is low, and gasification is difficult to stable control and igniting difficulty and unsafe problem, and a kind of coal underground gasifying technology system proposing.
Technical scheme of the present invention is achieved in that
A coal underground gasifying technology system, comprises gasifying agent injection hole, gas exit boring, trunk gasification tunnel, branch's gasification tunnel, boring stay pipe, gasifying agent ascending pipe, incendiary agent ascending pipe, sealing device and ignition point mobile device.Described gasifying agent injection hole and gas exit boring vertically pierce coal seam, until required gasification bottom; Described trunk gasification tunnel one end connects gasifying agent injection hole, and the other end is divided into Liang Tiao branch gasification tunnel, and the other end of Liang Tiao branch gasification tunnel respectively connects a gas exit boring, forms a gasification unit; Described boring stay pipe outer wall is provided with steam ascending pipe in the bottom of obturator; Described incendiary agent ascending pipe is vaporized agent ascending pipe and is placed in pipe, and is threaded connection or welds with gasifying agent ascending pipe; The described gasifying agent ascending pipe stay pipe of being holed is placed in pipe, and realizes and being connected and fixed and sealing of gasifying agent injection hole by obturator; Described obturator comprises upper flange, lower flange, and pad and bolt, be threaded connection fixed air agent ascending pipe, and establish the sealing function of the fixing and sealing device of wing support member auxiliary gasifying agent ascending pipe; Described ignition point mobile device is located between gasifying agent ascending pipe and incendiary agent ascending pipe tie point and obturator, comprises runner, rotating shaft and bracing frame.
The underground coal gasification(UCG) production technology that above-mentioned gasification system is realized:
A. utilize Directional Drilling vertically to drill gasifying agent injection hole and gas exit boring, horizontal drilling trunk gasification tunnel and branch's gasification tunnel, connect gasifying agent injection hole and gas exit boring; Incendiary agent ascending pipe is inserted in to gasifying agent ascending pipe, is threaded connection incendiary agent ascending pipe and gasifying agent ascending pipe are fixed.
B. the sleeve pipe of incendiary agent ascending pipe and gasifying agent ascending pipe is put into boring stay pipe, under after ignition point, lower flange is enclosed within to first wing support member bottom, then by sleeve pipe toward pressing down, until wing support chip is launched into level, be stuck in lower flange top.
C. pad is placed on upper flange, puts upper flange, rotate upper flange, upper flange is connected intact with sleeve pipe, and is bolted.
D. by steam ascending pipe, gasifying agent ascending pipe, inflammable gas ascending pipe branch, pyrophoric gas ascending pipe branch connects gas separately, and in closed condition.
E. open inflammable gas ascending pipe branch switch, after purging incendiary agent ascending pipe, close.
F. open pyrophoric gas ascending pipe branch switch, in gasifying agent ascending pipe, pass into pure oxygen/air, at ignition point place, the after-combustion of pyrophoric gas contact oxygen, realizes igniting.
G. after lighting a fire successfully, open inflammable gas ascending pipe branch switch, pass into inflammable gas, and close pyrophoric gas switch, make ignition point sustained combustion, the coal seam of igniting.
H. after the temperature of temperature point reaches more than 400 degree, igniting successfully in coal seam, closes inflammable gas switch.
I. after the temperature of temperature point reaches more than 800 degree, the steam ascending pipe of fetching boiling water, passes into steam.
J. when the temperature of temperature point reaches 600 degree when following, close steam ascending pipe, turn loose obturator upper flange, starting ignition point mobile device, the switching mouth of opening wing support member, takes off wing support member, by sleeve pipe when pulling on to next wing support member bottom, again by sleeve pipe toward pressing down, realize retreating of burning.
In gasification, by steam ascending pipe, continue to pass into steam, also can be in gasifying agent ascending pipe interrupted injected water steam, makes steam and gasifying agent be mixed into gasification tunnel.
K. turn back to step I, j, until coal combustion point moves to the gasification tunnel end.
The present invention is compared with prior art:
1. the technical program is owing to having adopted each trunk gasification tunnel of gasification tunnel to be divided into the structure of Liang Tiao branch gasification tunnel, artificially expanded the transverse width of gasification face, and utilize the principle of a plurality of thermal source conjugation burnings, naturally width and the height of gasification face have been expanded, the gasification of coal reserves that increased by 1 gasification face, have reduced cost;
2. the technical program is 45 ° owing to having adopted gasification unit Zhong Liangge branch's gasification tunnel and trunk gasification tunnel angle, can, in the situation that keeping cost and engineering quantity lower, improve unit gasification of coal reserves;
3. the technical program is owing to having adopted the many gasification unit of coal underground gasifying technology system to produce, arrange in adjacent with the relative position of gasification unit, not only can make full use of adjacent cells, the conjugation of unit burning relatively, increase horizontal pneumatization and longitudinal pneumatization, expanded high permeability zones simultaneously, again expanded horizontal gasification width and the height that longitudinally gasifies, increase gasification of coal reserves, and by the shared gas flue cost that reduced of gas exit, reduced the required boring number in gasification zone simultaneously, greatly reduce cost, as shown in Figure 4, after being used this patent gasification unit to arrange, former horizontal gasification zone 4 expanded pneumatization 7,
4. the technical program is owing to having adopted boring stay pipe outer wall to set up steam ascending pipe in the bottom of obturator, boring stay pipe is not only for supporting boring, prevent subsiding and destroying of boring, and can be for the injection of steam, when effectively utilizing pipeline, strengthen gasification reaction, improved gas quality.
5. the technical program is owing to having adopted the sealing device gasification ascending pipe that is threaded, and establishes the fixing of wing support member auxiliary gasifying agent ascending pipe, and wing support member can be protected gasifying agent ascending pipe outer wall thread, prevents its wearing and tearing, guarantees obturation effect; Wing support member is provided with and opens and closes mouth, detachable, recycling, and cost is low; Every 15-30 rice, establish and be threaded and wing support member, solved the problem of injection point backing, easy and simple to handle; Retreating that gas injection is simultaneously selected can not be burnt gasifying agent ascending pipe, incendiary agent ascending pipe etc., can reuse.
6. the technical program is owing to having adopted gasifying agent ascending pipe that incendiary agent ascending pipe is placed on to the frame mode in pipe, avoided mixing of incendiary agent and oxidant, improve the safety of ignition process, and incendiary agent ascending pipe gas outlet is shorter than gasifying agent ascending pipe, guarantee that burning gases fully contact with oxygen, improve efficiency of combustion, avoid burning gases loss simultaneously, improve the safety of gasification.
7. the technical program is owing to having adopted incendiary agent ascending pipe entrance to be provided with the structure of spontaneous combustion agent ascending pipe branch and inflammable compound ascending pipe branch, in ignition process, first injected gas agent and pyrophoric gas, after igniting, pass into inflammable gas, turn off pyrophoric gas, when continuing to ignite coal seam, save igniting cost, guarantee that the safety of ignition process is carried out.
Below in conjunction with drawings and Examples, the present invention is described in detail.
Accompanying drawing explanation
Fig. 1 is no-shaft underground gasification system schematic perspective view of the present invention;
Fig. 2 is the single gasification unit gasification tunnel of the present invention schematic diagram;
Fig. 3 is the gasification unit of the present invention schematic diagram of arranging;
Status architecture schematic diagram when Fig. 4 is gasification zone of the present invention work;
Fig. 5 is the overall structure schematic diagram of no-shaft underground gasification system of the present invention;
Fig. 6 is without the underground coal gasification(UCG) igniting of well formula and injection point backing device enlarged diagram in Fig. 1;
Fig. 7 is the positive TV structure enlarged diagram of obturator duty of the present invention;
Fig. 8 is A-A line section plan structure enlarged diagram in Fig. 3;
Fig. 9 is wing supporting piece structure enlarged diagram before work of the present invention;
Figure 10 is ignition point mobile device structure enlarged diagram of the present invention.
The specific embodiment
Embodiment
A kind of coal underground gasifying technology system embodiment, as shown in Fig. 1 to 10, this underground gasification system comprises gasifying agent injection hole 1, gas exit boring 2, trunk gasification tunnel 3, branch's gasification tunnel 5, boring stay pipe 8, gasifying agent ascending pipe 9, incendiary agent ascending pipe 10, sealing device 11 and ignition point mobile device 12.As shown in Figure 1, described gasifying agent injection hole 1 and gas exit boring 2 vertically pierce coal seam, until required gasification bottom; Described trunk gasification tunnel 3 one end connect gasifying agent injection hole 1, and the other end is divided into Liang Tiao branch gasification tunnel 5, and the other end of Liang Tiao branch gasification tunnel 5 respectively connects a gas exit boring 2, forms a gasification unit; As shown in Figure 5, described boring stay pipe 8 outer walls are provided with steam ascending pipe 8-1 in the bottom of obturator 11; Described incendiary agent ascending pipe 10 is vaporized agent ascending pipe 9 and is placed in pipe, and is connected or is welded by screw thread 13 with gasifying agent ascending pipe 9; Described gasifying agent ascending pipe 9 is placed in pipe by boring stay pipe 8, and being connected and fixed and sealing by obturator 11 realizations and boring stay pipe 8; As shown in Figure 7, described obturator 11 comprises upper flange 11-1, lower flange 11-2, pad 11-3 and bolt 11-4, by screw thread 11-11, be connected and fixed gasifying agent ascending pipe 9, and establish the sealing function of the fixing and sealing device 11 of wing support member 11-5 auxiliary gasifying agent ascending pipe 9; As shown in Fig. 5 and Figure 10, described ignition point mobile device 12 is located between gasifying agent ascending pipe 9 and incendiary agent ascending pipe 10 tie points and obturator 11, comprises runner 12-1, rotating shaft 12-2 and bracing frame 12-3.
In embodiment, described gasifying agent injection hole 1 and gas exit 2 vertical distances of holing are 400-800 rice; The spacing of two gas exit borings 2 of described gasification unit is the horizontal maximum gasification distance of 1 gasification unit, and scope is 15-30 rice.
In embodiment, described gasification unit Zhong Liangge branch gasification tunnel 5 equates with trunk gasification tunnel 3 angles, and angle α is 45 °.
In embodiment, when the many gasification unit of described coal underground gasifying technology system are produced, arranging of gasification unit comprises adjacent and relative two parts, as shown in Figure 3, adjacent part, gasification unit a, b are parallel, and share a gas exit boring; Relative part, a, two gasification unit of c are symmetrical about two gas exits, the 2 place straight lines of holing, and share two gas exits borings 2 simultaneously.If gasification zone is larger, can share gasifying agent inlet boring 1.
In embodiment, described boring stay pipe 8 is floral tube at gasification of coal layer segment.
In embodiment, as shown in Figure 5, described gasifying agent ascending pipe 9 is set up temperature point 9-3 at the inclined to one side upstream position of gasifying agent ascending pipe outlet 9-2.
In embodiment, described gasifying agent ascending pipe 9 outer walls are established external screw thread 9-1 and wing support member 11-5 every 15-30 rice, as shown in Figure 9, wing support member 11-5 top loop connecting 11-51 is fixed on gasifying agent ascending pipe 9 outer walls in the mode of internal thread, and bottom is folded to gasifying agent ascending pipe 9 tube walls but is unfixing; Described wing support member 11-5 comprises two wing support chip 11-52, and wing support chip 11-52 is square or semicircle, and between two wing support chip 11-52, ring-type place sets up and opens and closes a mouthful 11-53.
In embodiment, as shown in Figure 7, described sealing device upper flange 11-1 is provided with internal thread 11-11,9 outer wall external screw thread 9-1 mate with gasifying agent ascending pipe, as shown in Figure 8, described lower flange 11-2 relative position is established two groove 11-21, and described groove 11-21 width is greater than the width of wing support member 11-5.
In embodiment, as shown in Figure 9, described incendiary agent ascending pipe 10 is slightly shorter than gasifying agent ascending pipe at gas outlet, i.e. incendiary agent ascending pipe outlet 10-3 is included in gasifying agent ascending pipe outlet 9-2, gasifying agent ascending pipe outlet 9-2 is ignition point 6, is positioned at the intersection point place of Liang Tiao branch gasification tunnel.
In embodiment, as shown in Figure 1, described incendiary agent ascending pipe 10 entrances are provided with the spontaneous combustion agent ascending pipe 10-1 of branch and the inflammable compound ascending pipe 10-2 of branch.
According to the structure of above-mentioned underground coal gasification system, the production craft step of underground gasification is as follows:
A. utilize Directional Drilling vertically to drill gasifying agent injection hole 1 and gas exit boring 2, horizontal drilling trunk gasification tunnel 3 and branch's gasification tunnel 5, connect gasifying agent injection hole 1 and gas exit boring 2; Incendiary agent ascending pipe 10 is inserted in to gasifying agent ascending pipe 9, by screw thread 13, connects incendiary agent ascending pipe 10 and gasifying agent ascending pipe 9 are fixed.
B. the sleeve pipe of incendiary agent ascending pipe 10 and gasifying agent ascending pipe 9 is put into boring stay pipe 8, arrive down after ignition point 6, lower flange 11-2 is enclosed within to first wing support member 11-5 bottom, again by sleeve pipe toward pressing down, as shown in Figure 7, until wing support chip 11-52 is launched into level, be stuck in lower flange 11-2 top.
C. pad 11-3 is placed on to upper flange 11-1 upper, puts upper flange 11-1, rotate upper flange 11-1, upper flange 11-1 is connected intact with sleeve pipe, and fixes by bolt 11-4.
D. by steam ascending pipe 8-1, gasifying agent ascending pipe 9, the inflammable gas ascending pipe 10-2 of branch, the pyrophoric gas ascending pipe 10-1 of branch connects gas separately, and in closed condition.
E. open the inflammable gas ascending pipe 10-2 of branch switch, after purging incendiary agent ascending pipe 10, close.
F. open the pyrophoric gas ascending pipe 10-1 of branch switch, in gasifying agent ascending pipe 9, pass into pure oxygen/air, at ignition point place, the after-combustion of pyrophoric gas contact oxygen, realizes igniting.
G. after lighting a fire successfully, open the inflammable gas ascending pipe 10-2 of branch switch, pass into inflammable gas, and close pyrophoric gas switch, make ignition point sustained combustion, the coal seam of igniting.
H. after the temperature of temperature point 9-3 reaches more than 400 degree, igniting successfully in coal seam, closes inflammable gas switch.
I. after the temperature of temperature point 9-3 reaches more than 800 degree, the steam ascending pipe 8-1 that fetches boiling water, passes into steam.
J. when the temperature of temperature point 9-3 reaches 600 degree when following, close steam ascending pipe 8-1, turn loose obturator upper flange 11-1, starting ignition point mobile device 12, the switching mouth 11-53 that opens wing support member 11-5, takes off wing support member 11-5, by sleeve pipe when pulling on to next wing support member 11-5 bottom, again by sleeve pipe toward pressing down, realize retreating of burning.
In order to prevent in underground gasification process that coal gas is gathered in gasification tunnel, blast, can in gasification, by steam ascending pipe, continue to pass into steam, also can be in gasifying agent ascending pipe interrupted injected water steam, makes steam and gasifying agent be mixed into gasification tunnel.
K. turn back to step I, j, until coal combustion point moves to the gasification tunnel end.
Claims (11)
1. a coal underground gasifying technology system, is characterized in that, described underground gasification system comprises gasifying agent injection hole, gas exit boring, trunk gasification tunnel, branch's gasification tunnel, boring stay pipe, gasifying agent ascending pipe, incendiary agent ascending pipe, sealing device and ignition point mobile device.Described gasifying agent injection hole and gas exit boring vertically pierce coal seam, until required gasification bottom; Described trunk gasification tunnel one end connects gasifying agent injection hole, and the other end is divided into Liang Tiao branch gasification tunnel, and the other end of Liang Tiao branch gasification tunnel respectively connects a gas exit boring, forms a gasification unit; Described boring stay pipe outer wall is provided with steam ascending pipe in the bottom of obturator; Described incendiary agent ascending pipe is vaporized agent ascending pipe and is placed in pipe, and is threaded connection or welds with gasifying agent ascending pipe; The described gasifying agent ascending pipe stay pipe of being holed is placed in pipe, and realizes and being connected and fixed and sealing of gasifying agent injection hole by obturator; Described obturator comprises upper flange, lower flange, and pad and bolt, be threaded connection fixed air agent ascending pipe, and establish the sealing function of the fixing and sealing device of wing support member auxiliary gasifying agent ascending pipe; Described ignition point mobile device is located between gasifying agent ascending pipe and incendiary agent ascending pipe tie point and obturator, comprises runner, rotating shaft and bracing frame.
2. a kind of coal underground gasifying technology system according to claim 1, is characterized in that, described gasifying agent injection hole and gas exit boring vertical distance are 400-800 rice; The spacing of two gas exit borings of described gasification unit is the horizontal maximum gasification distance of 1 gasification unit, and scope is 15-30 rice.
3. a kind of coal underground gasifying technology system according to claim 1, is characterized in that, described gasification unit Zhong Liangtiao branch gasification tunnel equates with trunk gasification tunnel angle, and angle α is 45 °.
4. a kind of coal underground gasifying technology system according to claim 1, it is characterized in that, when the many gasification unit of described coal underground gasifying technology system are produced, arranging of gasification unit comprises adjacent and relative two parts, adjacent part, each gasification unit is parallel, and shares a gas exit boring; Relative part, two gasification unit are symmetrical about two gas exits boring place straight lines, share two gas exits borings simultaneously.If gasification zone is larger, can share the boring of gasifying agent inlet.
5. a kind of coal underground gasifying technology system according to claim 1, is characterized in that: described boring stay pipe is floral tube at gasification of coal layer segment.
6. a kind of coal underground gasifying technology system according to claim 1, is characterized in that, described gasifying agent ascending pipe exports inclined to one side upstream position at gasifying agent ascending pipe and sets up temperature point.
7. a kind of coal underground gasifying technology system according to claim 1, it is characterized in that, described gasifying agent ascending pipe outer wall is established external screw thread and wing support member every 15-30 rice, wing support member top loop connecting is fixed on gasifying agent ascending pipe outer wall in the mode of internal thread, and bottom is folded to gasifying agent ascending pipe tube wall but is unfixing; Described wing support member comprises two wing support chips, and support chip is square or semicircle, and between two wing support chips, ring-type place sets up and opens and closes mouth.
8. a kind of coal underground gasifying technology system according to claim 1, it is characterized in that, described sealing device upper flange is provided with internal thread, mates with gasifying agent ascending pipe outer wall external screw thread, described lower flange relative position is established two grooves, and described recess width is greater than the width of wing support member.
9. a kind of coal underground gasifying technology system according to claim 1, it is characterized in that, incendiary agent ascending pipe is slightly shorter than gasifying agent ascending pipe at gas outlet, be that the outlet of incendiary agent ascending pipe is included in the outlet of gasifying agent ascending pipe, the outlet of gasifying agent ascending pipe is ignition point, is positioned at the intersection point place of Liang Tiao branch gasification tunnel.
10. a kind of coal underground gasifying technology system according to claim 1, is characterized in that, described incendiary agent ascending pipe entrance is provided with spontaneous combustion agent ascending pipe branch and inflammable compound ascending pipe branch.
11. a kind of coal underground gasifying technology systems that system realizes according to claim 1, is characterized in that, the processing step that gasification is produced is as follows:
A. utilize Directional Drilling vertically to drill gasifying agent injection hole and gas exit boring, horizontal drilling trunk gasification tunnel and branch's gasification tunnel, connect gasifying agent injection hole and gas exit boring; Incendiary agent ascending pipe is inserted in to gasifying agent ascending pipe, is threaded connection incendiary agent ascending pipe and gasifying agent ascending pipe are fixed.
B. the sleeve pipe of incendiary agent ascending pipe and gasifying agent ascending pipe is put into boring stay pipe, under after ignition point, lower flange is enclosed within to first wing support member bottom, then by sleeve pipe toward pressing down, until wing support chip is launched into level, be stuck in lower flange top.
C. pad is placed on upper flange, puts upper flange, rotate upper flange, upper flange is connected intact with sleeve pipe, and is bolted.
D. by steam ascending pipe, gasifying agent ascending pipe, inflammable gas ascending pipe branch, pyrophoric gas ascending pipe branch connects gas separately, and in closed condition.
E. open inflammable gas ascending pipe branch switch, after purging incendiary agent ascending pipe, close.
F. open pyrophoric gas ascending pipe branch switch, in gasifying agent ascending pipe, pass into pure oxygen/air, at ignition point place, the after-combustion of pyrophoric gas contact oxygen, realizes igniting.
G. after lighting a fire successfully, open inflammable gas ascending pipe branch switch, pass into inflammable gas, and close pyrophoric gas switch, make ignition point sustained combustion, the coal seam of igniting.
H. after the temperature of temperature point reaches more than 400 degree, igniting successfully in coal seam, closes inflammable gas switch.
I. after the temperature of temperature point reaches more than 800 degree, the steam ascending pipe of fetching boiling water, passes into steam.
J. when the temperature of temperature point reaches 600 degree when following, close steam ascending pipe, turn loose obturator upper flange, starting ignition point mobile device, the switching mouth of opening wing support member, takes off wing support member, by sleeve pipe when pulling on to next wing support member bottom, again by sleeve pipe toward pressing down, realize retreating of burning.
In gasification, by steam ascending pipe, continue to pass into steam, also can be in gasifying agent ascending pipe interrupted injected water steam, makes steam and gasifying agent be mixed into gasification tunnel.
K. turn back to step I, j, until coal combustion point moves to the gasification tunnel end.
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| 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 |
| CN104612653A (en) * | 2015-02-11 | 2015-05-13 | 新奥气化采煤有限公司 | Underground gasification method |
| CN104653167A (en) * | 2015-02-06 | 2015-05-27 | 新奥气化采煤有限公司 | Underground gasification stove and gasification method thereof |
| CN104675375A (en) * | 2015-02-06 | 2015-06-03 | 新奥气化采煤有限公司 | Underground gasification method and underground gasification system |
| CN104695933A (en) * | 2015-02-13 | 2015-06-10 | 新奥气化采煤有限公司 | Gasification method and gasification furnace of coal seams based on branch wells |
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| CN104989365A (en) * | 2015-07-22 | 2015-10-21 | 攀钢集团攀枝花钢铁研究院有限公司 | Coal underground gasification temperature control system |
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| CN106089178A (en) * | 2016-08-18 | 2016-11-09 | 中国矿业大学(北京) | A kind of gas injection point mobile controller and control method thereof |
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| CN108729916A (en) * | 2018-07-17 | 2018-11-02 | 国氢能源科技有限公司 | A kind of underground gasification furnace coal seam igniter and retrogressing repeat igniting gasification method |
| CN109339788A (en) * | 2018-11-15 | 2019-02-15 | 杨昌玮 | A method of control underground coal spontaneous combustion simultaneously develops and uses |
| CN109736766A (en) * | 2019-01-31 | 2019-05-10 | 中国矿业大学 | Strengthen the advanced pressure break C-shaped furnace method in coal seam of underground coal gasification(UCG) chemical reaction |
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