CN103510934A - Method and system for exploiting land combustible ice - Google Patents
Method and system for exploiting land combustible ice Download PDFInfo
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- CN103510934A CN103510934A CN201310128146.XA CN201310128146A CN103510934A CN 103510934 A CN103510934 A CN 103510934A CN 201310128146 A CN201310128146 A CN 201310128146A CN 103510934 A CN103510934 A CN 103510934A
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- combustible ice
- methane
- insulation
- land
- gas
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- 238000000034 method Methods 0.000 title claims abstract description 29
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 94
- 238000009413 insulation Methods 0.000 claims abstract description 37
- 239000007789 gas Substances 0.000 claims abstract description 34
- 238000010438 heat treatment Methods 0.000 claims abstract description 20
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000001816 cooling Methods 0.000 claims abstract description 7
- 238000005553 drilling Methods 0.000 claims abstract description 7
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 7
- 239000002360 explosive Substances 0.000 claims abstract description 6
- 238000002347 injection Methods 0.000 claims abstract description 5
- 239000007924 injection Substances 0.000 claims abstract description 5
- 239000000446 fuel Substances 0.000 claims abstract description 4
- 239000007788 liquid Substances 0.000 claims abstract 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 48
- 239000002352 surface water Substances 0.000 claims description 20
- 238000002485 combustion reaction Methods 0.000 claims description 15
- 230000006835 compression Effects 0.000 claims description 11
- 238000007906 compression Methods 0.000 claims description 11
- 239000002912 waste gas Substances 0.000 claims description 6
- 239000008400 supply water Substances 0.000 claims description 5
- 208000002925 dental caries Diseases 0.000 claims description 3
- 150000004677 hydrates Chemical class 0.000 claims description 3
- 239000007921 spray Substances 0.000 claims description 2
- 239000002918 waste heat Substances 0.000 claims description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical group [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims 1
- 238000007664 blowing Methods 0.000 claims 1
- 239000003595 mist Substances 0.000 claims 1
- 229910052717 sulfur Inorganic materials 0.000 claims 1
- 239000011593 sulfur Substances 0.000 claims 1
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 abstract description 8
- 229910002092 carbon dioxide Inorganic materials 0.000 abstract description 4
- 239000001569 carbon dioxide Substances 0.000 abstract description 4
- 239000002699 waste material Substances 0.000 abstract description 3
- 239000007787 solid Substances 0.000 abstract description 2
- 239000013505 freshwater Substances 0.000 abstract 3
- 238000004880 explosion Methods 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 238000005057 refrigeration Methods 0.000 abstract 1
- 238000006467 substitution reaction Methods 0.000 abstract 1
- 239000002689 soil Substances 0.000 description 4
- 239000003344 environmental pollutant Substances 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- 238000004821 distillation Methods 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 241000425571 Trepanes Species 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Images
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/70—Combining sequestration of CO2 and exploitation of hydrocarbons by injecting CO2 or carbonated water in oil wells
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- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention provides a method and system for exploiting land combustible ice. Two vertical shafts with different depths and not far from each other are drilled to a combustible ice layer through a drilling machine. Two communicated cavities are formed in the bottoms of the vertical shafts through explosion of explosive, high-temperature fresh water is continuously injected into the bottom of the deeper vertical shaft, so that solid methane is converted into methane gas, the methane gas is ejected from the other vertical shaft, pressurization and cooling are conducted so that moisture can be removed, refrigeration is conducted on the methane gas through a nitrogen compressor until the temperature of the methane gas reaches minus 162 DEG C, so that methane liquid is obtained or the methane gas is converted into the combustible ice again for storage, and part of the exploited methane serves as fuel for heating the fresh water. The method and system for exploiting the land combustible ice have the advantages that as long as injection of the high-temperature fresh water stops, resolving of the combustible ice stops, and an insulation measure of a pipeline and a container is achieved, so that waste of heat energy is avoided; electric power is supplied by a diesel generator, so that manufacturing cost is low and operation is reliable; the method belongs to a gap permeation substitution method, and therefore underground collapse is avoided; only carbon dioxide is contained in the emission and all the other waste is backfilled underground for reuse.
Description
(1) technical field
The present invention relates to exploitation method and the system of a kind of land combustible ice (formal name used at school " gas hydrates "), especially a kind of cost simple in structure, reliable is low, energy-conserving and environment-protective, safety controlled non-pollutant discharge land petroleum resources exploitation method and system.
(2) background technology
Land combustible ice is the crystalline solid that methane gas forms with water molecules under cryogenic high pressure environment, mainly be present in the plateau permafrost layer of land, the main gas componant that heating decompression produces after decomposing is the methane that purity is very high, methane molecule only has a carbon atom, after burning, the carbon dioxide of discharge is few, and not having sulfide to produce, is a kind of desirable clean energy resource.At present, also do not have in the world a kind of exploitation method and system of land frozen soil layer combustible ice of maturation formally to put into commercial operation, reason is all more complicated of existing exploitation method, cost is high, and lack controllability and operability, and easily cause the leakage of natural gas, cause the greenhouse effect of environment pollution and atmosphere, also, in test room's exploratory stage, cannot drop into commercial operation.
(3) summary of the invention
The present invention is in order to make up the deficiencies in the prior art, provide a kind of simple in structure, reliable, cost is low, exploitation method and the system of the land frozen soil layer combustible ice (formal name used at school " gas hydrates ") of energy-conserving and environment-protective, the controlled non-pollutant discharge of safety.
The present invention is achieved by the following technical solutions:
Special character of the present invention is: the ore bed middle and lower part of containing combustible ice by two vertical shafts of land drilling well machine drill below the frozen soil layer of land, and the degree of depth of two vertical shafts is slightly different, and spacing is too not far away.Again to the high temperature surface water after dark any silo bottom injection heating, make methane from the solid-state gaseous state that becomes, gaseous methane sprays from another vertical shaft, through pressurization and the cooling moisture of removing wherein, pass through nitrogen compression refigerating machine again cooling become liquefied methane or again make combustible ice store for future use.A part for the methane of exploiting is as the fuel of surface water heating.
The invention has the beneficial effects as follows: 1, because this invention is to have the ore bed of combustible ice to inject high temperature surface water below frozen soil layer landwards, make methane from the solid-state gaseous state of becoming, before injecting hot surface water, there is the sufficient time to carry out the sealing and anti-leakage work of pipeline, " distillation " process need absorption heat due to methane, as long as stop injecting high temperature surface water in the process of exploitation, combustible ice will stop its " distillation " process at short notice, can not cause the leakage of methane.2, the part methane of exploiting heats surface water after insulation combustion heating furnace internal combustion, a heat part for high temperature surface water is absorbed by combustible ice below land, and after remainder rises to above, through heat exchanger, heat exchange is again heated surface water and recycled.The high-temp waste gas producing after methyl hydride combustion is discharged in atmosphere after water tank again, and the moisture in waste gas and heat are again fully absorbed and utilize, and the most pipelines of whole system and container tank adopt Insulation, almost there is no the waste of heat energy.3, this system adopts diesel-electric set electric supply, and cost is low, reliable, easy to maintenance.4, this exploitation method belongs to space penetration and replacement method, but not mining method can not produce very large cavity, and the surface water injecting below land has been filled the shared space of original combustible ice, can not cause land to cave in.5, the methane of exploiting is not dispersed in atmosphere, reaches coefficient of mining maximize through recycled for multiple times.6, the emission of this system only has carbon dioxide, and the whole backfills of other discarded objects are reused below land, non-pollutant discharge.
(4) accompanying drawing explanation
Accompanying drawing is the schematic diagram of land of the present invention combustible ice exploitation method and system
Wherein: 1 insulation hot water (gas) intake line, 2 booster water pumps, 3 insulation combustion heating furnaces, 4 booster fans, 5 insulation water tanks, 6 diesel generating sets, 7 nitrogen compression refigerating machines, 8 holding vessels, 9 gas compression eliminators, 10 heat exchangers, 11 drilling well working platformes, 12 insulation methane output pipes, 13 supply-water pump ，14 control centres.
(5) specific embodiment
As shown be a kind of specific embodiment of land of the present invention combustible ice exploitation method and system.Comprise: insulation hot water (gas) intake line (1), booster water pump (2), insulation combustion heating furnace (3), booster fan (4), insulation water tank (5), diesel generating set (6), nitrogen compression refigerating machine (7), holding vessel (8), gas compression eliminator (9), heat exchanger (10), drilling well working platform (11), insulation methane output pipe (12), and supply-water pump (13), control centre (14).During enforcement, can pass through land trepan, bore two vertical shaft degree of depth and reach the middle and lower part of land combustible ice reservoir, in vertical shaft, put into respectively insulation hot water (gas) intake line (1) profit insulation methane output pipe (12) and and vertical shaft inwall between good seal, prevent methane leakage, then in the bottom of vertical shaft, with appropriate explosive, explode two cavitys and guarantee as far as possible simultaneously and connect, after blast, insulation hot water (gas) intake line (1) starts to explode two cavitys injection high temperature surface water to explosive, after being heated, combustible ice in cavity decomposites the methane gas that contains steam with certain pressure, together with methane gas that previously explosive decomposition went out, from insulation methane output pipe (12), rising to sea enters above heat exchanger (10) and carries out cooling, first a heatable brick bed gas isolated condensed water after heat exchanger (10) is cooling flows in insulation water tank (5).
Methane gas is cooling through heat exchanger (10), through gas compression eliminator (9), compress again and isolate after moisture wherein, through flow-control distributing valve, distribute, most of methane, through nitrogen compression refigerating machine (7) be cooled to-162 ℃ after liquefy methane, or again become combustible ice, be transported to holding vessel (8) medium to be transported.Fraction is transported to combustion heating furnace (3) internal combustion and heats surface water.
Insulation combustion heating furnace (3) at first can be with ready-made methane gas as fuel combustion, heating surface water.The high-temp waste gas (main component is carbon dioxide and steam) producing after the interior methyl hydride combustion of insulation combustion heating furnace (3) is through booster fan (4) supercharging, enter in insulation water tank (5), heat in waste gas heats surface water again, steam liquefy water in waste gas, is mixed in the surface water in tank.
Whole control carried out in the operation of this system particularly flow Shi You control centre (14) of each pipeline.
Surface water in water tank (5) is mainly drawn from surface water by supply-water pump (13), after heat exchanger (10) heating, provides.
Insulation hot water (gas) intake line (1) be according to gas output in insulation methane output pipe (12) number and surface water backfill need to determine to input hot water or hot steam.
Continuous injection along with hot water (vapour), explosive explodes two underground cavity pockets that and can constantly expand, unite two into one, and continue to expand, if the content of combustible ice is not too large, cavity can not expand, but cavity gap around can constantly extend towards periphery, the methane gas of can constantly emerging in gap.
The simplification drive manner of this system is, the hot water vapor after heating, through insulation hot water (gas) intake line (1), is injected land continuously, and methane gas is produced from insulation methane output pipe (12) continuously.
Claims (9)
- Exploitation method and the system of 1.Yi Zhong land combustible ice (formal name used at school " gas hydrates "), comprise: insulation hot water (gas) intake line (1), booster water pump (2), insulation combustion heating furnace (3), booster fan (4), insulation water tank (5), diesel generating set (6), nitrogen compression refigerating machine (7), holding vessel (8), gas compression eliminator (9), heat exchanger (10), drilling well working platform (11), insulation methane output pipe (12), supply-water pump (13) and control centre (14); It is characterized in that in order to prevent thermal loss, all transfer pipelines and container tank outside all will be made thermal insulation and process.
- 2. exploitation method and the system of land according to claim 1 combustible ice is characterized in that: need to be slightly different by two degree of depth of land drilling well machine drill, spacing is not wanted the middle and lower part that vertical shaft too far away contains the ore bed of combustible ice below land, then in the bottom of vertical shaft, explodes two cavitys and guarantee as far as possible simultaneously with appropriate explosive to connect; Again to dark any silo bottom by continuous high temperature surface water or the steam after injection heating of insulation hot water (gas) intake line (1), make methane from the solid-state gaseous state that becomes, gaseous methane sprays through insulation methane output pipe (12) from another vertical shaft.
- 3. exploitation method and the system of land according to claim 1 combustible ice is characterized in that: the part methane gas that this system is produced is the fuel to surface water heating as insulation combustion heating furnace (3); Water in insulation water tank (5) is delivered into heating in insulation combustion heating furnace (3) through booster water pump (2), then by being incubated hot water (gas) intake line (1), constantly injects land.
- 4. exploitation method and the system of land according to claim 1 combustible ice is characterized in that: the waste gas that insulation combustion heating furnace (3) produces is input into after by booster fan (4) supercharging and is incubated in water tank (5), its waste heat and moisture and sulfur-bearing refuse are absorbed by water, and are again back to underground.
- 5. exploitation method and the system of land according to claim 1 combustible ice is characterized in that: the inner final products of this system holding vessel (8) are combustible ice or liquid methane, product introduction holding vessel (8) will be isolated moisture through gas compression eliminator (9) before, then cools through nitrogen compression refigerating machine (7).
- 6. exploitation method and the system of land according to claim 1 combustible ice is characterized in that: in this system the combustible ice on land be in the mode of methane and the blowing of steam mist through insulation methane output pipe (12) ejection, rise on drilling well working platform (11).
- 7. exploitation method and the system of land according to claim 1 combustible ice is characterized in that: surface water enters insulation water tank (5) before through supply-water pump (13), to pass through heat exchanger (10) and carry out exchange heat intensification, give the methane gas just having come up from insulation methane output pipe (12) cooling simultaneously.
- 8. exploitation method and the system of land according to claim 1 combustible ice is characterized in that: the overall operation Shi You control centre (14) of this system controls.
- 9. exploitation method and the system of land according to claim 1 combustible ice is characterized in that: this system is used diesel generating set (6) power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310128146.XA CN103510934B (en) | 2013-04-15 | 2013-04-15 | The exploitation method of a kind of land combustible ice and system |
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| CN201310128146.XA CN103510934B (en) | 2013-04-15 | 2013-04-15 | The exploitation method of a kind of land combustible ice and system |
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| CN103510934A true CN103510934A (en) | 2014-01-15 |
| CN103510934B CN103510934B (en) | 2016-01-06 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103334728A (en) * | 2013-04-25 | 2013-10-02 | 李贤明 | Exploitation method and system of land methane hydrate |
| CN105331353A (en) * | 2014-08-12 | 2016-02-17 | 成都能生材科技开发有限责任公司 | Method for preparing SCD capable of sub-cooling and liquefying flammable ice, reducing pressure and freezing point of nano pore seam |
| CN109779574A (en) * | 2019-03-22 | 2019-05-21 | 大连理工大学 | A kind of exploitation of gas hydrates system and method based on wind-powered electricity generation compensation |
| CN112127856A (en) * | 2019-06-24 | 2020-12-25 | 南京延长反应技术研究院有限公司 | Device for exploiting combustible ice on land |
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2013
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112127856B (en) * | 2019-06-24 | 2024-04-26 | 南京延长反应技术研究院有限公司 | Device for exploiting combustible ice on land |
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| CN103510934B (en) | 2016-01-06 |
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Effective date of registration: 20151204 Address after: 255086 Shandong city of Zibo province high tech Zone Wanjie Road No. 108 Applicant after: ZIBO HIGH-TECH ZONE CHENGDA MACHINERY DESIGN INSTITUTE Address before: 250100 No. 18 Huaxin Road, Lixia District, Shandong, Ji'nan Applicant before: Li Xianming |
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