CN114151060A - Preheating ignition device for coal field gasification and coal field gasification method - Google Patents
Preheating ignition device for coal field gasification and coal field gasification method Download PDFInfo
- Publication number
- CN114151060A CN114151060A CN202111432048.6A CN202111432048A CN114151060A CN 114151060 A CN114151060 A CN 114151060A CN 202111432048 A CN202111432048 A CN 202111432048A CN 114151060 A CN114151060 A CN 114151060A
- Authority
- CN
- China
- Prior art keywords
- coal
- oxygen
- fixed
- air inlet
- pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000003245 coal Substances 0.000 title claims abstract description 101
- 238000002309 gasification Methods 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 20
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 97
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 97
- 239000001301 oxygen Substances 0.000 claims abstract description 97
- 239000007789 gas Substances 0.000 claims abstract description 57
- 238000010438 heat treatment Methods 0.000 claims abstract description 28
- 230000001681 protective effect Effects 0.000 claims abstract description 28
- 238000005553 drilling Methods 0.000 claims abstract description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 238000005485 electric heating Methods 0.000 claims description 10
- 238000009413 insulation Methods 0.000 claims description 9
- 230000002265 prevention Effects 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 5
- 230000005611 electricity Effects 0.000 claims description 5
- 238000005520 cutting process Methods 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 239000011435 rock Substances 0.000 claims description 3
- 238000007493 shaping process Methods 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 238000007664 blowing Methods 0.000 claims description 2
- 239000004570 mortar (masonry) Substances 0.000 claims description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 22
- 238000006243 chemical reaction Methods 0.000 description 17
- 229910002092 carbon dioxide Inorganic materials 0.000 description 11
- 238000007254 oxidation reaction Methods 0.000 description 11
- 238000006722 reduction reaction Methods 0.000 description 11
- 230000009467 reduction Effects 0.000 description 10
- 238000002485 combustion reaction Methods 0.000 description 8
- 230000003647 oxidation Effects 0.000 description 8
- 238000000197 pyrolysis Methods 0.000 description 7
- 238000005065 mining Methods 0.000 description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 239000003034 coal gas Substances 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- LCGLNKUTAGEVQW-UHFFFAOYSA-N Dimethyl ether Chemical compound COC LCGLNKUTAGEVQW-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- XLYOFNOQVPJJNP-ZSJDYOACSA-N heavy water Substances [2H]O[2H] XLYOFNOQVPJJNP-ZSJDYOACSA-N 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 238000005984 hydrogenation reaction Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/295—Gasification of minerals, e.g. for producing mixtures of combustible gases
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23Q—IGNITION; EXTINGUISHING-DEVICES
- F23Q7/00—Incandescent ignition; Igniters using electrically-produced heat, e.g. lighters for cigarettes; Electrically-heated glowing plugs
- F23Q7/06—Incandescent ignition; Igniters using electrically-produced heat, e.g. lighters for cigarettes; Electrically-heated glowing plugs structurally associated with fluid-fuel burners
- F23Q7/10—Incandescent ignition; Igniters using electrically-produced heat, e.g. lighters for cigarettes; Electrically-heated glowing plugs structurally associated with fluid-fuel burners for gaseous fuel, e.g. in welding appliances
Landscapes
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Chemical & Material Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Solid-Fuel Combustion (AREA)
Abstract
The invention discloses a preheating ignition device for coal field gasification and a coal field gasification method, which comprise an air inlet hole and an air outlet hole which go deep into a coal layer, wherein protective sleeves are fixed inside the air inlet hole and the air outlet hole, an ignition fixing rod going deep into the coal layer is fixed on the inner wall of the air inlet hole, an igniter is fixed at the lower end part of the ignition fixing rod, an oxygen supply pipe is fixed at the pipe orifice at the upper end of the protective sleeve inside the air inlet hole through a pipe hoop, and an inlet temperature monitor is fixed at one end of the oxygen supply pipe close to the protective sleeve. Has the advantages that: the heating pipe can be used for heating oxygen injected into the drilling well, so that the temperature in the coal bed is increased under the condition of ensuring the oxygen concentration in the coal bed, the coal can be conveniently ignited and combusted quickly, and the coal gasification time is shortened; a large amount of high-temperature gas generated by coal gasification can further heat the coal bed and crack the coal bed, so that the gasified gas can be conveniently circulated, and the gasified gas can be conveniently discharged.
Description
Technical Field
The invention relates to the technical field of coal mining, in particular to a preheating ignition device for coal field gasification and a coal field gasification method.
Background
Underground coal gasification is a process in which coal located underground is burned in a controlled manner and combustible gas is produced by the thermal and chemical action of the coal. The underground coal gasification technology can not only recover the coal resources abandoned by the mine, but also be used for mining thin coal seams, deep coal seams, coal pressing under 'three times' and coal seams with high sulfur, high ash and high gas which are difficult to mine by miners or have poor economy and safety. The underground gasified gas can be used as fuel gas for direct civil use and power generation, and can also be used for extracting pure hydrogen or used as raw material gas of synthetic oil, dimethyl ether, ammonia and methanol.
Compared with the traditional coal mining and ground gasification, the underground coal gasification technology has the following advantages: (1) coal resources which are uneconomical to be exploited and cannot be exploited by the traditional method can be recovered; (2) because the coal does not need artificial mining, the health and safety problems of miners are reduced to the maximum extent by underground gasification; (3) ground subsidence is reduced, and solid waste discharge is less; (4) the influence on social economy is reduced; (5) low investment and low coal gas cost.
Underground coal gasification is a process in which coal located underground is combusted in a controlled manner to produce combustible gas through thermal and chemical actions on the coal. The method comprises the following specific steps:
(I) and (2) blowing gasification agents (air, O2 and H2O (g)) from an air inlet channel, igniting the coal bed on an air inlet side, burning O2 in the gasification agents when meeting coal to generate CO2, releasing a large amount of reaction heat, wherein the combustion zone is called an oxidation zone, and when the concentration of O2 in the airflow is close to zero, the combustion reaction is finished, and the oxidation zone is finished. The main reactions in the oxidation zone are as follows:
oxidation reaction (combustion reaction):
C+O2＝＝CO2+393.8MJ/kmol
partial oxidation reaction of carbon (incomplete combustion reaction):
2C+O2＝＝2CO+221.1MJ/kmol
CO oxidation reaction (CO combustion reaction):
2CO+O2＝＝2CO2+570.1MJ/kmol
(II) after the oxidation zone is finished, the coal bed enters a reduction zone, the coal bed in the reduction zone is in a glowing state by the oxidation zone, CO2 and glowing C are reduced into CO in the reduction zone, H2O (g) and glowing C are reduced into CO, H2 and the like, the temperature of the coal bed and the gas flow is gradually reduced because the reduction reaction is an endothermic reaction, and when the temperature is reduced to a weaker degree, the reduction zone is finished. The main reactions in the reduction zone are as follows:
CO2 reduction (producer gas reaction):
CO2+C＝＝2CO+162.4MJ/kmol
steam decomposition reaction (water gas reaction):
H2O+C＝＝H2+CO+131.5MJ/kmol
water vapor decomposition reaction:
2H2O+C＝＝2H2+CO2+90.0MJ/kmol
CO shift reaction:
CO+H2O＝＝H2+CO2+41.0MJ/kmol
and (3) hydrogenation reaction of carbon:
C+2H2＝＝CH4+74.9MJ/kmol
(III) after the reduction zone is finished, the temperature of the gas flow is still high, the coal bed at the downstream, namely the dry distillation drying zone, is heated, pyrolysis coal gas is released, and meanwhile, methanation reaction is generated. The main reactions in the dry distillation drying zone are as follows:
coal pyrolysis reaction:
coal → CH4+ H2+ H2O + CO + CO2
Methanation reaction:
CO+3H2＝＝CH4+H2O+206.4MJ/kmol
2CO+2H2＝＝CH4+CO2+247.4MJ/kmol
CO2+4H2＝＝CH4+2H2O+165.4MJ/kmol
from the chemical reaction point of view, three areas (namely an oxidation area, a reduction area and a dry distillation drying area) are not strictly limited, the oxidation area and the reduction area also have coal pyrolysis reaction, and the division of the three areas is only the relative strength of the oxidation, reduction and pyrolysis reaction in a gasification channel. After passing through the three reaction zones, coal gas containing combustible components mainly H2, CO and CH4 is generated, and the gasification reaction zone gradually moves towards the gas outlet, so that the continuous operation of the gasification reaction process is maintained.
When underground coal gasification is carried out, because the coal bed is deep, the temperature is low, and the humidity of some places is very high, the coal is difficult to ignite, and even if the coal is ignited, the coal is easy to extinguish before large-range combustion, and the coal needs to be ignited again, so that a large amount of manpower, material resources and time are wasted, the workload is increased, and the cost is increased.
Disclosure of Invention
The present invention has been made to solve the above problems, and an object of the present invention is to provide a preheating ignition device for field gasification and a field gasification method.
The invention realizes the purpose through the following technical scheme:
the utility model provides a coal field gasification is with preheating ignition, is including going deep into inlet port and the venthole on coal layer, the inlet port the inside protective casing that all is fixed with of venthole, be fixed with the ignition dead lever who goes deep into coal layer on the inlet port inner wall, the tip is fixed with the some firearm under the ignition dead lever, the inlet port is inside protective casing upper end pipe mouth department is fixed with the oxygen supply pipe through the ferrule, the oxygen supply pipe is close to the one end of protective casing is fixed with the entry temperature monitor, the oxygen supply pipe other end is connected with the oxygenerator through the ferrule, the heating pipe is installed through the ferrule in the middle part of the oxygen supply pipe, the venthole is inside protective casing upper end pipe mouth department is fixed with the gas collection pipe through the ferrule, be fixed with the export temperature monitor on the gas collection pipe.
Furthermore, a booster pump is arranged between the oxygen supply pipe and the oxygen generator.
Further, the heating pipe includes insulation support, the inside inlay card of insulation support is fixed with cage heater, be fixed with the temperature controller through the screw on the insulation support outer wall, the temperature controller with cage heater electricity is connected.
Further, the cage heater comprises two annular fixed disks, 6-12 electric heating tubes are fixed between the two annular fixed disks in an annular array mode, and the electric heating tubes are electrically connected with the temperature controller.
Furthermore, inside the venthole the inside fire prevention cage of inlaying in protective casing upper end, perpendicular equidistant welding has a plurality of fire shield in the fire prevention cage, the last array shaping of fire shield has the bleeder vent, two adjacent on the fire shield the bleeder vent misplaces each other.
Furthermore, an oxygen hose is arranged inside the air inlet hole, the lower end of the oxygen hose is positioned at the bottom of the air inlet hole, and the upper end of the oxygen hose is tightly connected and fixed on the oxygen supply pipe.
The invention also discloses a coal field gasification method applying the preheating ignition device for coal field gasification, which comprises the following steps:
the method comprises the following steps: drilling a well from the ground to a coal seam, wherein the well comprises an air inlet hole and an air outlet hole, the distance between the air inlet hole and the air outlet hole is 10-50 m, a protective sleeve is arranged in the air inlet hole and the air outlet hole after drilling, an ignition fixed rod and an igniter are arranged in the air inlet hole, and the protective sleeve is directly fixed with the air inlet hole and the air outlet hole in a clearance pouring mode;
step two: mounting a pipeline, namely mounting a gas collecting pipe at an orifice at the upper end of an air outlet, mounting an oxygen supply pipe at an orifice at the upper end of an air inlet, mounting the oxygen supply pipe and an oxygenerator together, and mounting a heating pipe on the oxygen supply pipe;
step three: injecting oxygen, starting an oxygen generator and a heating pipe, wherein oxygen-enriched gas generated by the oxygen generator enters an air inlet through an oxygen supply pipe, when the oxygen passes through the heating pipe, the oxygen absorbs heat generated by the heating pipe to become high-temperature oxygen, and the high-temperature oxygen enters a coal gap through an air inlet;
step four: safety detection, namely detecting the pressure, the oxygen content and the gas content in the pipeline before ignition to ensure safety;
step five: igniting, namely, when the temperature of the discharged gas detected by the outlet temperature monitor is 10 ℃ higher than that of the discharged gas detected initially, performing ignition preparation, sealing a pipeline of a gas collecting pipe, and igniting coal and gas through an igniter;
step six: and after 6-10h of ignition, opening a gas collecting pipe and collecting gas generated by coal gasification.
Further, in the first step, after drilling, the drill cuttings, rock powder and water in the drilling well are blown out by using high-pressure gas, and then the air holes, other drill holes and cracks on the ground except the drilling well are sealed.
Furthermore, in the second step, an oxygen hose is arranged in the protective sleeve in the air inlet, then the upper end of the oxygen hose is connected with the oxygen supply pipe, and the lower end of the oxygen hose reaches the bottom of the air inlet.
Furthermore, in the third step, a booster pump is directly installed between the heating pipe and the oxygen generator, and the power of the booster pump is adjusted according to the inlet air temperature detected by the inlet temperature monitor.
The invention has the beneficial effects that: the heating pipe can be used for heating oxygen injected into the drilling well, so that the temperature in the coal bed is increased under the condition of ensuring the oxygen concentration in the coal bed, the coal can be conveniently ignited and combusted quickly, and the coal gasification time is shortened; a large amount of high-temperature gas generated by coal gasification can further heat the coal bed and crack the coal bed, so that the gasified gas can be conveniently circulated, and the gasified gas can be conveniently discharged.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic view of a preheating ignition device for gasification of a coal field according to the present invention;
FIG. 2 is a cross-sectional view of a heating tube of the present invention;
FIG. 3 is a schematic view of the cage heater of the present invention;
FIG. 4 is a cross-sectional view of a fire protection cage of the present invention.
Description of reference numerals:
1. an air inlet; 2. an oxygen generator; 3. a booster pump; 4. an oxygen supply tube; 5. heating a tube; 6. an inlet temperature monitor; 7. an outlet temperature monitor; 8. a gas collection tube; 9. a protective sleeve; 10. an air outlet; 11. a fire-proof cage; 12. an igniter; 13. an ignition fixing lever; 14. a heat-insulating sleeve; 15. a cage heater; 16. a temperature controller; 17. fixing the disc; 18. an electric heating tube; 19. a fire barrier; 20. air holes are formed; 21. an oxygen hose.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in figures 1-4, a preheating ignition device for coal field gasification comprises an air inlet 1 and an air outlet 10 which go deep into a coal layer, a protective sleeve 9 is fixed inside the air inlet 1 and the air outlet 10, an ignition fixing rod 13 which goes deep into the coal layer is fixed on the inner wall of the air inlet 1, an igniter 12 is fixed at the lower end of the ignition fixing rod 13, gas and coal are conveniently ignited, carbon monoxide and carbon dioxide are generated by combustion to gasify the coal field, an oxygen supply pipe 4 is fixed at the upper end pipe orifice of the protective sleeve 9 inside the air inlet 1 through a pipe hoop, an oxygen hose 21 is arranged inside the air inlet 1, the lower end of the oxygen hose 21 is positioned at the bottom of the air inlet 1, the upper end of the oxygen hose 21 is tightly connected and fixed on the oxygen supply pipe 4 to ensure that high-pressure high-concentration oxygen can directly enter the bottom of a drilling well and permeate into the coal layer, an inlet temperature monitor 6 is fixed at one end of the oxygen supply pipe 4 close to the protective sleeve 9, a temperature height for detecting high pressure high concentration oxygen after the heating, oxygen supply pipe 4 other end is connected with oxygenerator 2 through the ferrule, install booster pump 3 between oxygen supply pipe 4 and the oxygenerator 2, be used for exerting pressure, control gaseous circulation speed, oxygen supply pipe 4 middle part is installed heating pipe 5 through the ferrule, can produce the heat and heat high pressure high concentration oxygen, the inside protecting cover pipe 9 upper end mouth of pipe department of venthole 10 is fixed with gas collecting pipe 8 through the ferrule, conveniently collect the gas that the coal field gasification produced, be fixed with export temperature monitor 7 on the gas collecting pipe 8, a temperature for detecting from the gas of drilling well drilling combustion, entry temperature monitor 6, the model of export temperature monitor 7 is WR-200.
In this embodiment, heating pipe 5 includes insulation support 14, insulation support 14 is inside inlay card to be fixed with cage heater 15, there is temperature controller 16 through the fix with screw on the insulation support 14 outer wall, temperature controller 16 is connected with cage heater 15 electricity, cage heater 15 includes two annular fixed disks 17, annular array is fixed with 6-12 electric heating tubes 18 between two fixed disks 17, electric heating tube 18 is connected with temperature controller 16 electricity, electric heating tube 18 outside is the steel pipe, inside is spiral electric heating wire, generate heat after electric heating tube 18 circular telegram and produce 200 ℃ -500 ℃ of high temperature, when high enriched oxygen passes through from cage heater 15 inside, the absorbed heat becomes high temperature oxygen, and bring the heat into the inside coal seam of well drilling and heat.
In this embodiment, the inside embedding of 9 upper ends of the inside protective casing of venthole 10 has fire prevention cage 11, and perpendicular equidistant welding has a plurality of fire baffle 19 in the fire prevention cage 11, and the array shaping has bleeder vent 20 on the fire baffle 19, and bleeder vent 20 on two adjacent fire baffles 19 misplaces each other, and the flue gas can pass through, and flame is blocked, can avoid flame to run out from protective casing 9 and burn out gas collecting pipe 8.
The invention also discloses a coal field gasification method applying the preheating ignition device for coal field gasification, which comprises the following steps: the method comprises the following steps:
the method comprises the following steps: drilling a well from the ground to a coal seam, wherein the well comprises an air inlet hole 1 and an air outlet hole 10, the diameters of the air inlet hole 1 and the air outlet hole 10 are both 106mm, the distance between the air inlet hole 1 and the air outlet hole 10 is 30 m, the air inlet hole 1 and the air outlet hole 10 both penetrate into the coal seam, a protective sleeve 9 is arranged in the air inlet hole 1 and the air outlet hole 10 after drilling, an ignition fixed rod 13 and an igniter 12 are arranged in the air inlet hole 1, and concrete mortar is directly poured into the protective sleeve 9, the air inlet hole 1 and the air outlet hole 10 in a clearance mode for fixation;
step two: installing a pipeline, namely installing a gas collecting pipe 8 at an orifice at the upper end of an air outlet 10, installing an oxygen supply pipe 4 at an orifice at the upper end of an air inlet 1, installing the oxygen supply pipe 4 and an oxygenerator 2 together, installing a heating pipe 5 on the oxygen supply pipe 4, installing an oxygen hose 21 in a protective sleeve 9 in the air inlet 1, connecting the upper end of the oxygen hose 21 with the oxygen supply pipe 4, and enabling the lower end of the oxygen hose 21 to reach the bottom of the air inlet 1;
step three: injecting oxygen, starting an oxygen generator 2 and a heating pipe 5, enabling oxygen-enriched gas generated by the oxygen generator 2 to enter an air inlet hole 1 through an oxygen supply pipe 4, pressurizing the gas to 80-100kg/cm2 by using a pure oxygen plunger pump, absorbing heat generated by the heating pipe 5 to become high-temperature oxygen when the oxygen passes through the heating pipe 5, enabling the high-temperature oxygen to enter a coal gap through the air inlet hole 1, directly installing a booster pump 3 on the heating pipe 5 and the oxygen generator 2, adjusting the power of the booster pump 3 according to the inlet air temperature detected by an inlet temperature monitor 6, increasing the power of the booster pump 3 when the temperature is high, increasing the oxygen supply speed, reducing the power of the booster pump 3 or closing the booster pump 3 when the temperature is low, and ensuring that the gas entering the drilling well can carry a large amount of heat;
step four: safety detection, namely detecting the pressure, the oxygen content and the gas content in the pipeline before ignition to ensure safety;
step five: igniting, namely, when the outlet temperature monitor 7 detects that the temperature of the discharged gas is increased by 10 ℃ compared with the initial detection, performing ignition preparation, closing a pipeline of a gas collecting pipe 8, and igniting coal and gas through an igniter 12;
step six: and after 6-10h of ignition, the gas collecting pipe 8 is opened to collect the gas generated by coal gasification.
In the first step, after drilling, the drill cuttings, rock powder and water in the drilling well are blown out by using high-pressure gas, and then the air holes 20, other drill holes and cracks on the ground except the drilling well are sealed.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed.
Claims (10)
1. The utility model provides a coal field gasification is with preheating ignition which characterized in that: including inlet port (1) and venthole (10) deep into the coal layer, inlet port (1), venthole (10) inside all is fixed with protective casing (9), be fixed with ignition dead lever (13) deep into the coal layer on inlet port (1) inner wall, the tip is fixed with some firearm (12) under ignition dead lever (13), inlet port (1) is inside protective casing (9) upper end mouth of pipe department is fixed with oxygen supply pipe (4) through the ferrule, oxygen supply pipe (4) are close to the one end of protective casing (9) is fixed with entry temperature monitor (6), the oxygen supply pipe (4) other end is connected with oxygenerator (2) through the ferrule, heating pipe (5) are installed through the ferrule in oxygen supply pipe (4) middle part, venthole (10) are inside protective casing (9) upper end mouth of pipe department is fixed with gas collecting pipe (8) through the ferrule, an outlet temperature monitor (7) is fixed on the gas collecting pipe (8).
2. The preheating ignition device for coal field gasification according to claim 1, characterized in that: a booster pump (3) is arranged between the oxygen supply pipe (4) and the oxygen generator (2).
3. The preheating ignition device for coal field gasification according to claim 1, characterized in that: heating pipe (5) include insulation support (14), insulation support (14) inside inlay card is fixed with cage heater (15), there is temperature controller (16) through the fix with screw on insulation support (14) outer wall, temperature controller (16) with cage heater (15) electricity is connected.
4. The preheating ignition device for coal field gasification according to claim 3, characterized in that: cage heater (15) include two annular fixed disks (17), two annular array is fixed with 6-12 electric heating tubes (18) between fixed disk (17), electric heating tube (18) with temperature controller (16) electricity is connected.
5. The preheating ignition device for coal field gasification according to claim 1, characterized in that: inside venthole (10) inside protective casing (9) upper end is inside to be inlayed and is had fire prevention cage (11), perpendicular equidistant welding has a plurality of fire shield (19) in fire prevention cage (11), the array shaping has bleeder vent (20) on fire shield (19), adjacent two on fire shield (19) bleeder vent (20) are misplaced each other.
6. The preheating ignition device for coal field gasification according to claim 1, characterized in that: an oxygen hose (21) is arranged inside the air inlet hole (1), the lower end of the oxygen hose (21) is positioned at the bottom of the air inlet hole (1), and the upper end of the oxygen hose (21) is tightly connected and fixed on the oxygen supply pipe (4).
7. A method of gasifying a coal field using the preheating ignition device for gasifying a coal field according to any one of claims 1 to 6, characterized by: the method comprises the following steps:
the method comprises the following steps: drilling a well from the ground to a coal seam, wherein the well comprises an air inlet hole (1) and an air outlet hole (10), the distance between the air inlet hole (1) and the air outlet hole (10) is 10-50 m, a protective sleeve (9) is arranged in the air inlet hole (1) and the air outlet hole (10) after drilling, an ignition fixing rod (13) and an igniter (12) are arranged in the air inlet hole (1), and the protective sleeve (9), the air inlet hole (1) and the air outlet hole (10) are directly fixed by pouring concrete mortar in a clearance mode;
step two: mounting a pipeline, namely mounting a gas collecting pipe (8) at the orifice at the upper end of an air outlet (10), mounting an oxygen supply pipe (4) at the orifice at the upper end of an air inlet (1), mounting the oxygen supply pipe (4) and an oxygen generator (2) together, and mounting a heating pipe (5) on the oxygen supply pipe (4);
step three: injecting oxygen, starting an oxygen generator (2) and a heating pipe (5), enabling oxygen-enriched gas generated by the oxygen generator (2) to enter an air inlet hole (1) through an oxygen supply pipe (4), absorbing heat generated by the heating pipe (5) to become high-temperature oxygen when the oxygen passes through the heating pipe (5), and enabling the high-temperature oxygen to enter a coal gap through the air inlet hole (1);
step four: safety detection, namely detecting the pressure, the oxygen content and the gas content in the pipeline before ignition to ensure safety;
step five: ignition, namely, when the temperature of the discharged gas detected by an outlet temperature monitor (7) is increased by 10 ℃ compared with the initial detection, ignition preparation is carried out, a pipeline of a gas collecting pipe (8) is closed, and coal and gas are ignited by an igniter (12);
step six: and after ignition is carried out for 6-10h, a gas collecting pipe (8) is opened, and gas generated by coal gasification is collected.
8. The coal field gasification method using the preheating ignition device for coal field gasification as claimed in claim 7, wherein: in the first step, after drilling, high-pressure gas is used for blowing out drill cuttings, rock powder and water in the drilling well, and then air holes (20) on the ground except the drilling well, other drilling holes and cracks are sealed.
9. The coal field gasification method using the preheating ignition device for coal field gasification as claimed in claim 7, wherein: in the second step, an oxygen hose (21) is arranged in a protective sleeve (9) in the air inlet hole (1), then the upper end of the oxygen hose (21) is connected with the oxygen supply pipe (4), and the lower end of the oxygen hose (21) reaches the bottom of the air inlet hole (1).
10. The coal field gasification method using the preheating ignition device for coal field gasification as claimed in claim 7, wherein: in the third step, a booster pump (3) is directly installed on the heating pipe (5) and the oxygen generator (2), and the power of the booster pump (3) is adjusted according to the inlet air temperature detected by the inlet temperature monitor (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111432048.6A CN114151060B (en) | 2021-11-29 | 2021-11-29 | Preheating ignition device for coal field gasification and coal field gasification method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111432048.6A CN114151060B (en) | 2021-11-29 | 2021-11-29 | Preheating ignition device for coal field gasification and coal field gasification method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114151060A true CN114151060A (en) | 2022-03-08 |
| CN114151060B CN114151060B (en) | 2024-10-11 |
Family
ID=80784284
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111432048.6A Active CN114151060B (en) | 2021-11-29 | 2021-11-29 | Preheating ignition device for coal field gasification and coal field gasification method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114151060B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101382064A (en) * | 2008-09-04 | 2009-03-11 | 乌兰察布新奥气化采煤技术有限公司 | Underground forced oxidation and ignition technology for coal |
| CN103670338A (en) * | 2012-09-21 | 2014-03-26 | 新奥气化采煤有限公司 | Method for extracting coalbed methane and coal together |
| CN104153750A (en) * | 2014-08-20 | 2014-11-19 | 北京中科诚毅科技发展有限公司 | Method for generating coal gas underground through air fracture and micro negative pressure |
| CN107091079A (en) * | 2017-06-16 | 2017-08-25 | 新疆国利衡清洁能源科技有限公司 | Coal underground gasification ignition device and method |
| CN109779599A (en) * | 2019-01-30 | 2019-05-21 | 刘云山 | A kind of coalfield pure oxygen pressure break gasification process |
| CN214345192U (en) * | 2021-01-28 | 2021-10-08 | 山东山海川环保科技有限公司 | Flue gas treatment device |
-
2021
- 2021-11-29 CN CN202111432048.6A patent/CN114151060B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101382064A (en) * | 2008-09-04 | 2009-03-11 | 乌兰察布新奥气化采煤技术有限公司 | Underground forced oxidation and ignition technology for coal |
| CN103670338A (en) * | 2012-09-21 | 2014-03-26 | 新奥气化采煤有限公司 | Method for extracting coalbed methane and coal together |
| CN104153750A (en) * | 2014-08-20 | 2014-11-19 | 北京中科诚毅科技发展有限公司 | Method for generating coal gas underground through air fracture and micro negative pressure |
| CN107091079A (en) * | 2017-06-16 | 2017-08-25 | 新疆国利衡清洁能源科技有限公司 | Coal underground gasification ignition device and method |
| CN109779599A (en) * | 2019-01-30 | 2019-05-21 | 刘云山 | A kind of coalfield pure oxygen pressure break gasification process |
| CN214345192U (en) * | 2021-01-28 | 2021-10-08 | 山东山海川环保科技有限公司 | Flue gas treatment device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114151060B (en) | 2024-10-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| UA88280C2 (en) | Method and device for production of electric energy by means of gas turbine and steam turbine (variants) | |
| CN104153750B (en) | A kind of method that use air pressure break and tiny structure underground produce coal gas | |
| CN105485895B (en) | Built-in biomass gasification combustion water heater | |
| CN110552678A (en) | method for producing hydrogen by reverse well arrangement, one injection and multiple production supercritical combustion gasification of deep and super-thick layer coal | |
| CN109779599A (en) | A kind of coalfield pure oxygen pressure break gasification process | |
| CN104632177B (en) | One kind is without well formula underground coal gasification system and technique | |
| KR20070048149A (en) | Method and apparatus of gasification under igcc system | |
| CN114151060B (en) | Preheating ignition device for coal field gasification and coal field gasification method | |
| JP5040361B2 (en) | Fuel gasification equipment | |
| CN102635940B (en) | Gasification combined-combustion hot-blast stove | |
| RU2539055C1 (en) | Coal gasification complex | |
| CN109268834A (en) | One kind returning formula heat energy utilization type Combined garbage pyrolysis processing furnace | |
| CN103980944A (en) | Method for preparing flue gas by using high-temperature cracking biomass | |
| CN203730135U (en) | Power generation device for producer gas combustion gas turbine | |
| CN210267248U (en) | Garbage gasification primary and secondary furnace equipment with upward flame-throwing combustion stove | |
| CN212356523U (en) | Boiler flue gas modifier | |
| CN202852836U (en) | Device capable of fully extinguishing yellow phosphorus electric furnace diffusion torches | |
| CN205368265U (en) | Water gas generates device | |
| CN110469306A (en) | Coal seam oil reservoir underground detonation direction and location crack gas injection produces gas method | |
| CN217302812U (en) | Tail gas heat recovery processing system | |
| CN112627791B (en) | Mobile ignition system, device and method for underground coal gasification | |
| CN110986043A (en) | Major structure and system of L-shaped organic solid waste carbon gasification furnace | |
| KR101781725B1 (en) | Water energy melting incinerator using combustion properties of brown gas | |
| CN212805670U (en) | Low-concentration and ultra-low-concentration gas double-oxidation cogeneration system | |
| CN211822401U (en) | Major structure and system of L-shaped organic solid waste carbon gasification furnace |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant |