CN111677489A - Multilayer composite nozzle device capable of improving underground coal gasification efficiency and application method thereof - Google Patents
Multilayer composite nozzle device capable of improving underground coal gasification efficiency and application method thereof Download PDFInfo
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- CN111677489A CN111677489A CN202010489914.4A CN202010489914A CN111677489A CN 111677489 A CN111677489 A CN 111677489A CN 202010489914 A CN202010489914 A CN 202010489914A CN 111677489 A CN111677489 A CN 111677489A
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- 238000002309 gasification Methods 0.000 title claims abstract description 86
- 239000003245 coal Substances 0.000 title claims abstract description 84
- 238000000034 method Methods 0.000 title claims abstract description 28
- 239000002131 composite material Substances 0.000 title claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 97
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 32
- 230000007246 mechanism Effects 0.000 claims abstract description 17
- 230000008569 process Effects 0.000 claims abstract description 17
- 239000007789 gas Substances 0.000 claims description 9
- 238000002485 combustion reaction Methods 0.000 claims description 8
- 238000011065 in-situ storage Methods 0.000 claims description 8
- 239000000956 alloy Substances 0.000 claims description 6
- 229910045601 alloy Inorganic materials 0.000 claims description 6
- 230000001105 regulatory effect Effects 0.000 claims description 6
- 230000009471 action Effects 0.000 claims description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 4
- 239000001301 oxygen Substances 0.000 claims description 4
- 229910052760 oxygen Inorganic materials 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract 1
- 239000001257 hydrogen Substances 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 230000036284 oxygen consumption Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B3/00—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements
- B05B3/02—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements
- B05B3/10—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements discharging over substantially the whole periphery of the rotating member, i.e. the spraying being effected by centrifugal forces
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C37/00—Other methods or devices for dislodging with or without loading
- E21C37/06—Other methods or devices for dislodging with or without loading by making use of hydraulic or pneumatic pressure in a borehole
- E21C37/12—Other methods or devices for dislodging with or without loading by making use of hydraulic or pneumatic pressure in a borehole by injecting into the borehole a liquid, either initially at high pressure or subsequently subjected to high pressure, e.g. by pulses, by explosive cartridges acting on the liquid
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Nozzles (AREA)
Abstract
A multilayer composite nozzle device capable of improving underground coal gasification efficiency and a use method thereof belong to the technical field of coal gasification, and are formed by connecting a gasification agent pipeline, a gasification nozzle, a high-pressure water closed cavity, a rotating ring and a rotation adjusting mechanism; the device has a novel structure and a clear use principle, and the arc-shaped notch on the rotating ring is driven to rotate relative to the water outlet hole by adjusting the rotating adjusting mechanism, so that the coal seam is cut by the gasification nozzle in the radial direction of 360 degrees; when the coal wetted by the high-pressure water is underground gasified, the content of CO in the coal gasification output gas can be effectively improved, the heat value of the output gas is improved, the adjustable high-pressure water control system can effectively cut and improve the effect of the coal bed in all directions to a certain extent, the underground coal gasification process can be effectively intervened on the ground, and the underground coal gasification controllability is improved.
Description
Technical Field
The invention belongs to the technical field of underground coal gasification, relates to auxiliary equipment and a process for underground coal gasification, and particularly relates to a multilayer composite nozzle device capable of improving underground coal gasification efficiency and a using method thereof.
Background
Underground coal gasification refers to a process of thermochemically processing coal by using a gasifying agent under a certain temperature and pressure and in an in-situ state of the coal to convert organic matters in the coal into coal gas. The coal is subjected to partial oxidation and reduction reactions by taking air, oxygen-enriched air, water vapor, carbon dioxide or hydrogen as a gasification medium, and the coal is converted into gas products mainly containing combustible components such as carbon monoxide, hydrogen, methane and the like in the substances such as carbon, hydrogen and the like. The gas product is further processed to prepare other gas, liquid combustion materials or chemical products. At present, coal is ignited in an in-situ space of a stratum through a drill hole or a tunnel in underground coal gasification, so that the coal generates a series of thermal action and chemical action, solid coal is changed into a gas state and is transported to the ground surface, but the coal is in a compaction state underground due to the extrusion of in-situ ground stress under the in-situ condition of the stratum, a gasification agent for underground coal gasification can only carry out oxidation combustion on the surface of the coal, the requirement on the quality of the coal is high, the gasification efficiency is low, and the equipment investment and the maintenance workload are increased if a multi-nozzle multi-path control system is adopted.
Disclosure of Invention
The invention aims to provide a multilayer composite nozzle device capable of improving coal gasification efficiency and a using method thereof, aiming at the defects that coal is affected by stratum extrusion, the coal and a gasification agent are not sufficiently combusted in a compacted state, the oxygen consumption is high, the gasification efficiency is low and the like in the existing underground coal gasification process, and the defects in the prior art can be overcome, so that the oxygen consumption can be further reduced, and the gasification efficiency can be improved.
The technical scheme of the invention is as follows: a multilayer composite nozzle device capable of improving the underground coal gasification efficiency comprises a gasification agent pipeline and a gasification nozzle arranged at the head part of the gasification agent pipeline; the method is characterized in that: the multilayer composite nozzle device is also formed by connecting a high-pressure water closed cavity, a rotating ring and a rotating adjusting mechanism; the high-pressure water closed cavity is an annular cavity formed by a water closed inner wall and a water closed outer wall on the outer circumference of the gasifying agent pipeline, the high-pressure water closed cavity is communicated with the inside of the gasifying agent pipeline, a plurality of water outlet holes are uniformly distributed on the outer circumference of the water closed outer wall, a rotating ring is arranged outside the high-pressure water closed cavity, an arc-shaped notch is formed in the rotating ring, the inner wall of the rotating ring is matched and connected with the outer wall of the high-pressure water closed cavity to perform in-situ rotating motion, a rotating adjusting mechanism is sleeved outside the rotating ring, the outer wall of the rotating ring is fixedly connected with the inner wall of the rotating adjusting mechanism, and the arc-shaped notch in the rotating ring is driven to rotate relative to the water outlet holes under the action of the rotating adjusting mechanism, so that the gasifying.
The high-pressure water sealed cavity is integrally welded and sealed with the gasifying agent pipeline, the water sealed outer wall is made of high-hardness alloy, the diameter of the water sealed outer wall is larger than the outer diameter of the gasifying agent pipeline, the water outlet holes are arranged on the water sealed outer wall in the middle, and the number of the water outlet holes is not less than 12.
The width of rotatory ring is less than the width that the high pressure water closed the cavity, and the arc breach sets up on rotatory ring between two parties, and the central angle of arc breach is 60, and the width of arc breach is greater than the aperture of apopore, and rotatory ring is made by high rigidity alloy, and rotatory ring joint sets up on water closed outer wall, and forms clearance rotation cooperation between the two.
The gasification nozzle is provided with a temperature sensor and is connected to an external control device through a control signal wire inside the gasification agent pipeline.
A use method of a multilayer composite nozzle device capable of improving coal gasification efficiency is characterized by comprising the following steps:
(1) injecting an oxygen-rich steam gasifying agent into the original gasification cavity by a gasification nozzle, and combusting and gasifying coal to form high-calorific-value coal underground gasification produced gas;
(2) along with the underground coal gasification process, the whole device retreats to perform gasification and combustion of the next part of coal;
(3) pressurizing the ground to form high-pressure water, and injecting water into a high-pressure water system through a high-pressure water pipe to supply energy;
(4) high-pressure water enters the high-pressure water closed cavity to form annular high-pressure water, and the high-pressure water is sprayed out from the water outlet;
(5) the rotating ring is adjusted by the rotating adjusting mechanism to drive the arc-shaped notch to rotate, so that water outlet in all directions of 360 degrees is realized, the coal bed can be effectively cut in the radial direction, and the coal bed cannot be excessively crushed to collapse;
(6) temperature control points arranged on the side wall of the gasifying agent nozzle are monitored on the ground, the efficiency and the process of underground coal gasification are fed back, the cutting and crushing degree of a high-pressure water system on a coal bed is further regulated and controlled, and the process and the efficiency of underground coal gasification are regulated and controlled;
(7) along with the coal underground gasification process, the combustion control area is continuously enlarged, the coal underground gasification surface is continuously retreated, and the whole device retreats to carry out the coal bed cutting and crushing work of the next stage.
The invention has the beneficial effects that: compared with the prior art, when the coal subjected to high-pressure water moistening test is underground gasified, the content of CO in the coal gasification output gas can be effectively increased, the heat value of the output gas is increased, and the adjustable and controllable high-pressure water control system can effectively cut and improve the efficiency of the coal bed in all directions to a certain extent. The method can effectively intervene in the underground coal gasification process on the ground, increase the contact area of the coal and the gasifying agent under the in-situ condition, and improve the gasification efficiency of the underground coal gasification.
Drawings
Fig. 1 is a schematic perspective view of the present invention.
FIG. 2 is a schematic plan view of the present invention.
In the figure: gasification nozzle 1, high-pressure water seal cavity 2, water seal inner wall 3, water seal outer wall 4, rotatory ring 5, arc breach 6, apopore 7, gasification agent pipeline 8, temperature sensor 9, rotation adjustment mechanism 10.
Detailed Description
The invention will be further described with reference to the accompanying drawings in which:
as shown in fig. 1-2, a multi-layer composite nozzle device capable of improving the underground coal gasification efficiency is formed by connecting a gasification agent pipeline 8, a gasification nozzle 1, a high-pressure water closed cavity 2, a rotating ring 5 and a rotation adjusting mechanism 9; the high-pressure water closed cavity 2 is an annular cavity formed by a water closed inner wall 3 and a water closed outer wall 4 on the outer circumference of a gasifying agent pipeline 8, the high-pressure water closed cavity 2 is communicated with the inside of the gasifying agent pipeline 8, a plurality of water outlets 7 are uniformly distributed on the outer circumference of the water closed outer wall 4, a rotating ring 5 is arranged outside the high-pressure water closed cavity 2, an arc notch 6 is arranged on the rotating ring 5, the inner wall of the rotating ring 5 is matched and connected with the outer wall of the high-pressure water closed cavity 2 to perform in-situ rotating motion, a rotating adjusting mechanism 9 is sleeved outside the rotating ring 5, the outer wall of the rotating ring 5 is fixedly connected with the inner wall of the rotating adjusting mechanism 9, the arc notch 6 on the rotating ring 5 is driven to rotate relative to the water outlets 7 under the action of the rotating adjusting mechanism 9.
As shown in fig. 1-2, a multilayer composite nozzle device capable of improving the underground coal gasification efficiency, wherein a high-pressure water closed cavity 2 is integrally welded and sealed with a gasification agent pipeline 8, a water closed outer wall 4 is made of high-hardness alloy, the diameter of the water closed outer wall 4 is larger than the outer diameter of the gasification agent pipeline 8, water outlet holes 7 are centrally arranged on the water closed outer wall 4, and the number of the water outlet holes 7 is not less than 12; the width of the rotating ring 5 is smaller than that of the high-pressure water sealed cavity 2, the arc-shaped notch 6 is arranged on the rotating ring 5 in the middle, the central angle of the arc-shaped notch 6 is 60 degrees, the width of the arc-shaped notch 6 is larger than the aperture of the water outlet hole 7, the rotating ring 5 is made of high-hardness alloy, the rotating ring 5 is clamped on the water sealed outer wall 4, and a gap rotating fit is formed between the rotating ring 5 and the water sealed outer wall 4; the gasification nozzle 1 is provided with a temperature sensor 9 which is connected to an external control device through a control signal wire inside the gasification agent pipeline 8.
As shown in fig. 1-2, a method for using a multi-layer composite nozzle device capable of improving underground coal gasification efficiency comprises the following steps:
(1) injecting an oxygen-rich steam gasifying agent into the original gasification cavity by a gasification nozzle, and combusting and gasifying coal to form high-calorific-value coal underground gasification produced gas;
(2) along with the underground coal gasification process, the whole device retreats to perform gasification and combustion of the next part of coal;
(3) pressurizing the ground to form high-pressure water, and injecting water into a high-pressure water system through a high-pressure water pipe to supply energy;
(4) high-pressure water enters the high-pressure water closed cavity to form annular high-pressure water, and the high-pressure water is sprayed out from the water outlet;
(5) the rotating ring is adjusted by the rotating adjusting mechanism to drive the arc-shaped notch to rotate, so that water outlet in all directions of 360 degrees is realized, the coal bed can be effectively cut in the radial direction, and the coal bed cannot be excessively crushed to collapse;
(6) temperature control points arranged on the side wall of the gasifying agent nozzle are monitored on the ground, the efficiency and the process of underground coal gasification are fed back, the cutting and crushing degree of a high-pressure water system on a coal bed is further regulated and controlled, and the process and the efficiency of underground coal gasification are regulated and controlled;
(7) along with the coal underground gasification process, the combustion control area is continuously enlarged, the coal underground gasification surface is continuously retreated, and the whole device retreats to carry out the coal bed cutting and crushing work of the next stage.
Claims (5)
1. A multilayer composite nozzle device capable of improving the underground coal gasification efficiency comprises a gasification agent pipeline (8) and a gasification nozzle (1) arranged at the head of the gasification agent pipeline (8); the method is characterized in that: the multilayer composite nozzle device is also formed by connecting a high-pressure water closed cavity (2), a rotating ring (5) and a rotating adjusting mechanism (9); the high-pressure water closed cavity (2) is an annular cavity formed by a water closed inner wall (3) and a water closed outer wall (4) on the outer circumference of the gasifying agent pipeline (8), the high-pressure water closed cavity (2) is communicated with the inside of the gasifying agent pipeline (8), a plurality of water outlets (7) are uniformly distributed on the outer circumference of the water closed outer wall (4), a rotating ring (5) is arranged outside the high-pressure water closed cavity (2), an arc-shaped notch (6) is arranged on the rotating ring (5), the inner wall of the rotating ring (5) is matched and connected with the outer wall of the high-pressure water closed cavity (2) to perform in-situ rotation motion, a rotation adjusting mechanism (9) is sleeved outside the rotating ring (5), the outer wall of the rotating ring (5) is fixedly connected with the inner wall of the rotation adjusting mechanism (9), and the arc-shaped notch (6) on the rotating ring (5) is driven to be opposite to the water outlets (7) under the action of the The gasification nozzle (1) is rotated, so that the coal seam is cut in the radial direction of 360 degrees.
2. The multi-layer composite nozzle device capable of improving the underground coal gasification efficiency according to claim 1, is characterized in that: the high-pressure water seals cavity (2) wholly and gasification agent pipeline (8) welded seal, and water seals outer wall (4) and is made by high rigidity alloy, and the diameter that water seals outer wall (4) is greater than the external diameter of gasification agent pipeline (8), and apopore (7) set up between two parties on water seals outer wall (4), and the quantity of apopore (7) is no less than 12.
3. The multi-layer composite nozzle device capable of improving the underground coal gasification efficiency according to claim 1, is characterized in that: the width of rotatory ring (5) is less than the width that high pressure water closed cavity (2), and arc breach (6) set up between two parties on rotatory ring (5), and the central angle of arc breach (6) is 60, and the width of arc breach (6) is greater than the aperture of apopore (7), and rotatory ring (5) are made by high hardness alloy, and rotatory ring (5) joint sets up on water closed outer wall (4), and forms clearance rotation cooperation between the two.
4. The multi-layer composite nozzle device capable of improving the underground coal gasification efficiency according to claim 1, is characterized in that: the gasification nozzle (1) is provided with a temperature sensor (9) which is connected to an external control device through a control signal line inside the gasification agent pipeline (8).
5. A use method of a multilayer composite nozzle device capable of improving underground coal gasification efficiency is characterized by comprising the following steps:
(1) injecting an oxygen-rich steam gasifying agent into the original gasification cavity by a gasification nozzle, and combusting and gasifying coal to form high-calorific-value coal underground gasification produced gas;
(2) along with the underground coal gasification process, the whole device retreats to perform gasification and combustion of the next part of coal;
(3) pressurizing the ground to form high-pressure water, and injecting water into a high-pressure water system through a high-pressure water pipe to supply energy;
(4) high-pressure water enters the high-pressure water closed cavity to form annular high-pressure water, and the high-pressure water is sprayed out from the water outlet;
(5) the rotating ring is adjusted by the rotating adjusting mechanism to drive the arc-shaped notch to rotate, so that water outlet in all directions of 360 degrees is realized, the coal bed can be effectively cut in the radial direction, and the coal bed cannot be excessively crushed to collapse;
(6) temperature control points arranged on the side wall of the gasifying agent nozzle are monitored on the ground, the efficiency and the process of underground coal gasification are fed back, the cutting and crushing degree of a high-pressure water system on a coal bed is further regulated and controlled, and the process and the efficiency of underground coal gasification are regulated and controlled;
(7) along with the coal underground gasification process, the combustion control area is continuously enlarged, the coal underground gasification surface is continuously retreated, and the whole device retreats to carry out the coal bed cutting and crushing work of the next stage.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010489914.4A CN111677489B (en) | 2020-06-02 | 2020-06-02 | Multilayer composite nozzle device capable of improving underground coal gasification efficiency and application method thereof |
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| CN202010489914.4A CN111677489B (en) | 2020-06-02 | 2020-06-02 | Multilayer composite nozzle device capable of improving underground coal gasification efficiency and application method thereof |
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| CN111677489B CN111677489B (en) | 2021-08-31 |
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| CN111677489B (en) | 2021-08-31 |
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