CN107990294B - Steam production device deep into dry-hot rock stratum - Google Patents
Steam production device deep into dry-hot rock stratum Download PDFInfo
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- CN107990294B CN107990294B CN201810022779.5A CN201810022779A CN107990294B CN 107990294 B CN107990294 B CN 107990294B CN 201810022779 A CN201810022779 A CN 201810022779A CN 107990294 B CN107990294 B CN 107990294B
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- steam
- pipe
- steam generating
- dry heat
- valve
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- 239000011435 rock Substances 0.000 title claims abstract description 23
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 33
- 230000000149 penetrating effect Effects 0.000 claims abstract description 10
- 230000015572 biosynthetic process Effects 0.000 claims description 10
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 238000010992 reflux Methods 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 229910000851 Alloy steel Inorganic materials 0.000 claims description 2
- 230000005611 electricity Effects 0.000 abstract description 3
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 238000005553 drilling Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 229910000570 Cupronickel Inorganic materials 0.000 description 1
- HZEWFHLRYVTOIW-UHFFFAOYSA-N [Ti].[Ni] Chemical compound [Ti].[Ni] HZEWFHLRYVTOIW-UHFFFAOYSA-N 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- YOCUPQPZWBBYIX-UHFFFAOYSA-N copper nickel Chemical compound [Ni].[Cu] YOCUPQPZWBBYIX-UHFFFAOYSA-N 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 229910001000 nickel titanium Inorganic materials 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
Abstract
A set of steam production devices penetrating into the dry heat rock stratum, which comprises a DCS control system, wherein the steam production devices consist of a plurality of identical units; each unit comprises a U-shaped pipeline extending into an underground dry heat rock stratum to form a linear exploitation structure; the two side pipelines of the U-shaped pipeline are respectively a water inlet pipe and a steam outlet pipe, and the bottom pipe of the U-shaped pipeline is a steam generating pipe; the inlet pipe water inlet has set gradually check valve, first electrically operated valve and has passed through booster pump and inlet channel intercommunication, and the vapour pipe exit is provided with the second electrically operated valve and is connected with user system through the pipeline, check valve, first electrically operated valve, booster pump and second electrically operated valve all with the DCS control system electricity federation. The invention can extend into 3800 meters under the ground to take heat and generate power, and the steam output, pressure and temperature are controllable, thus realizing long-period operation of the production device of more than 22 years.
Description
Technical Field
The invention relates to the technical field of geothermal equipment, in particular to a steam production device penetrating into a dry and hot rock stratum.
Background
The underground of China has a large-area available dry heat rock stratum, and the existing industrial production needs a water injection well and a steam production well; the heating mode is coarsely put within 3000 m from the ground surface, and the steam output, pressure and temperature are difficult to control.
Disclosure of Invention
The invention provides a set of steam production devices which are used for generating electricity and penetrate deep into a dry heat rock stratum and are controllable in steam output, pressure and temperature.
The technical scheme adopted is as follows:
a set of steam production devices penetrating into the dry heat rock stratum, which comprises a DCS control system, wherein the steam production devices consist of a plurality of identical units; each unit comprises a U-shaped pipeline extending into an underground dry heat rock stratum to form a linear exploitation structure; the two side pipelines of the U-shaped pipeline are respectively a water inlet pipe and a steam outlet pipe, and the bottom pipe of the U-shaped pipeline is a steam generating pipe; the inlet pipe water inlet has set gradually check valve, first electrically operated valve and has passed through booster pump and inlet channel intercommunication, and the vapour pipe exit is provided with the second electrically operated valve and is connected with user system through the pipeline, check valve, first electrically operated valve, booster pump and second electrically operated valve all with the DCS control system electricity federation.
The invention can extend into 3800 meters under the ground to take heat and generate power, and the steam output, pressure and temperature are controllable, thus realizing long-period operation of the production device of more than 22 years.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
fig. 2 is a schematic cross-sectional view of a steam generating tube according to the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Referring to FIG. 1, a set of steam production units extending into a hot dry rock formation includes a DCS control system, the steam production units being comprised of a plurality of identical units; each unit comprises a U-shaped pipe extending into the subterranean dry heat formation 7; the two side pipelines of the U-shaped pipeline are respectively a water inlet pipe 2-2 and a steam outlet pipe 2-4,U, and the bottom pipe of the pipeline is a steam generating pipe 2-3; the water inlet of the water inlet pipe 2-2 is sequentially provided with a check valve 11 and a first electric valve 9-1 and is communicated with the water inlet pipe 2-1 through the booster pump 3, the outlet of the steam outlet pipe 2-4 is provided with a second electric valve 9-2 and is connected with a user system through a pipeline, and the check valve 11, the first electric valve 9-1, the booster pump 3 and the second electric valve 9-2 are electrically connected with the DCS control system.
And a safety valve 10 is arranged at the outlet of the steam outlet pipe 2-4. When the steam pressure in the pipe suddenly rises to 6.0MPa, the safety valve automatically bounces off to play a role in pressure relief under emergency.
A return valve 9-3 is arranged on a pipeline between the check valve 11 and the first electric valve 9-1, and the return valve 9-3 is electrically connected with the DCS control system. When the vapor pressure in the pipe is about to reach the upper limit of 5.0MPa, the DCS system starts to instruct the reflux valve 9-3 to reduce the water supply amount and adjust the water inflow. At this point, the steam pipe outlet output air pressure begins to drop.
As shown in fig. 2, the steam generating tube 2-3 is provided with a base hole 12, and an inner sleeve 13 is movably arranged in the base hole 12. When the inner sleeve 13 is installed, two ends of the inner sleeve are provided with baffles 15 which are larger than the diameter of the base hole 12, and the baffles are formed by a hot riveting process. The inner sleeve 13 increases the strength of the steam generating tube 2-3, and prevents the inner hole of the inner sleeve 13, namely, the water vapor Kong Jiegou from being blocked, and when water is discharged, the inner sleeve 13 is jacked up, and when the water enters, the inner sleeve 13 is pressed down. The water fleeing from the water vapor hole is directly contacted with the rock wall and the cracks, so that the controllable heat exchange area is increased. Can realize single-tube limited long-period heat extraction at the temperature of more than 300 ℃.
The inner hole of the inner sleeve 13 is a water vapor hole 14, and the diameter of the water vapor hole 14 is 0.5-3 cm, preferably 0.01 m. And through 500 hours of experiments, the creep amount of the steam generating pipe 2-3 is only 0.7 mm when the diameter of the water vapor hole 14 is 0.5-3 cm, so that the purposes of automatically balancing the water/steam ratio according to the steam flow, pressure and temperature and prolonging the service life are achieved.
The inner sleeve 13 is made of alloy steel heterogeneous with the steam generating pipe 2-3. Such as nickel-titanium alloys, copper-nickel alloys, austenitic alloys, etc. When the operation temperature is 550 ℃, the outer wall of the inner sleeve 13 and the inner wall of the steam generating pipe 2-3 form a couple corrosion of more than 1.4mv, so that the base hole 12 is prevented from being blocked by impurities and scale formation is prevented.
The spacing between the base holes 12 is 1.5 to 4.5 meters, preferably 3 meters. Through 500 hours of experiments, when the distance between the base holes 12 is 1.5-4.5 meters, the experimental flexibility of the steam generating pipe 2-3 is 1.4 millimeters, so that the purposes of automatically balancing the water/steam ratio according to the steam flow, the pressure and the temperature and prolonging the service life are achieved.
The steam generating pipe 2-3 is made of furnace tube steel. So as to realize limit heat taking of deeper dry heat rock stratum more than 3800 meters; because the horizontal section is more than 600 meters, the heat exchange can be carried out for a long distance and a long time, and the single-tube limited long-period heat extraction at the temperature of more than 300 ℃ can be realized when the ground temperature is higher.
In order to adapt to the working condition that the water/steam impurity is more than 0.1 percent, the inner walls of the steam outlet pipe 2-4 and the steam generating pipe 2-3 are coated with wear-resistant layers. The temperature resistance of the wear-resistant coating layer can reach more than 700 ℃, but the heat conductivity coefficient can still be more than 45W/m 2 .K。
The actual application scene of the invention is as follows:
and constructing a thermal power plant on the land block specified by the crust extrusion basin in Qinghai province. Drilling underground until the temperature is more than 3800 meters, and entering the dry heat rock stratum; and then drilling horizontally for more than 600 meters, and drilling upwards to form a linear exploitation structure. And (3) when the drill rod is removed, introducing a high-pressure steam pipeline and connecting the pipeline to a pipeline network of a steam turbine set of the power plant.
The group of U-shaped trend pipelines which enter the underground dry heat rock stratum from the ground and return to the ground are provided with at least 2, preferably 8, pipelines which are radiated and unfolded in eight directions by taking a thermal power plant as the center. Or 60 meters to 2000 meters, preferably 600 meters, with average spacing. The layout can realize long-distance and long-time heat exchange.
And starting a booster pump, pumping water 1 with a specified standard into the ground through a pipeline to be heated by a dry heat rock stratum, generating water vapor 8 with a high temperature of more than 200 ℃ and a high pressure of more than 2.0MPa, and conveying the water vapor 8 to a steam turbine generator unit of a power plant through a steel pipeline to perform power generation operation. Distilled water is preferred as process water in the present invention. The steam flow, temperature and pressure are controlled by a computer program control system to command the operation of the electric valve. A relief valve and a check valve are provided to prevent the pipe pressure from suddenly rising; setting up a robot to carry out itinerant inspection on the running condition of the production flow.
The linear deep mining method can realize long-period operation of the production device for more than 22 years.
Claims (8)
1. The steam production device of a set of deep dry and hot stratum, including DCS control system, its characterized in that: the steam production device consists of a plurality of identical units; each unit comprises a U-shaped pipeline extending into an underground dry heat rock stratum (7) to form a linear exploitation structure; the two side pipelines of the U-shaped pipeline are respectively a water inlet pipe (2-2) and a steam outlet pipe (2-4), and the bottom pipe of the U-shaped pipeline is a steam generating pipe (2-3); the water inlet of the water inlet pipe (2-2) is sequentially provided with a check valve (11), a first electric valve (9-1) and is communicated with the water inlet pipe (2-1) through the booster pump (3), the outlet of the steam outlet pipe (2-4) is provided with a second electric valve (9-2) and is connected with a user system through a pipeline, and the check valve (11), the first electric valve (9-1), the booster pump (3) and the second electric valve (9-2) are electrically connected with the DCS control system; the steam generating pipe (2-3) is provided with a base hole (12), and an inner sleeve (13) is movably arranged in the base hole (12).
2. A set of steam generating devices penetrating a dry heat rock formation according to claim 1, wherein: the inner hole of the inner sleeve (13) is a water vapor hole (14), and the diameter of the water vapor hole (14) is 0.5-3 cm.
3. A set of steam generating devices penetrating a dry heat rock formation according to claim 2, wherein: the inner sleeve (13) is made of alloy steel heterogeneous with the steam generating pipe (2-3).
4. A set of steam generating devices penetrating a dry heat rock formation according to claim 1, wherein: the distance between the base holes (12) is 1.5-4.5 meters.
5. A set of steam generating devices penetrating a dry heat rock formation according to claim 1, wherein: and a safety valve (10) is arranged at the outlet of the steam outlet pipe (2-4).
6. A set of steam generating devices penetrating a dry heat rock formation according to claim 1, wherein: and a reflux valve (9-3) is arranged on a pipeline between the check valve (11) and the first electric valve (9-1), and the reflux valve (9-3) is electrically connected with the DCS control system.
7. A set of steam generating devices penetrating a dry heat rock formation according to claim 1, wherein: the steam generating pipe (2-3) is made of furnace tube steel.
8. A set of steam generating devices penetrating a dry heat rock formation according to claim 1, wherein: the inner walls of the steam outlet pipe (2-4) and the steam generating pipe (2-3) are coated with wear-resistant layers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810022779.5A CN107990294B (en) | 2018-01-10 | 2018-01-10 | Steam production device deep into dry-hot rock stratum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810022779.5A CN107990294B (en) | 2018-01-10 | 2018-01-10 | Steam production device deep into dry-hot rock stratum |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107990294A CN107990294A (en) | 2018-05-04 |
| CN107990294B true CN107990294B (en) | 2024-01-12 |
Family
ID=62041020
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810022779.5A Active CN107990294B (en) | 2018-01-10 | 2018-01-10 | Steam production device deep into dry-hot rock stratum |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107990294B (en) |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CA1303024C (en) * | 1985-03-13 | 1992-06-09 | Tsutomu Morie | Geothermal energy collecting method |
| KR20050068288A (en) * | 2003-12-30 | 2005-07-05 | 한국건설기술연구원 | Solar heating and domestic hot water system connected with a boiler for home |
| CN101027480A (en) * | 2004-06-23 | 2007-08-29 | 特拉瓦特控股公司 | Method of developing and producing deep geothermal reservoirs |
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| CN107062352A (en) * | 2017-06-13 | 2017-08-18 | 徐斌 | A kind of hot dry rock heating system |
| CN107489419A (en) * | 2017-10-13 | 2017-12-19 | 临沂矿业集团有限责任公司 | Rock body quality of mine drilling multisection type gas pumping test probe and system |
| CN207741060U (en) * | 2018-01-10 | 2018-08-17 | 宋晓轩 | One group of steam production plant for going deep into xeothermic rock stratum |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110048005A1 (en) * | 2009-08-26 | 2011-03-03 | Mchargue Timothy Reed | Loop geothermal system |
-
2018
- 2018-01-10 CN CN201810022779.5A patent/CN107990294B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1303024C (en) * | 1985-03-13 | 1992-06-09 | Tsutomu Morie | Geothermal energy collecting method |
| KR20050068288A (en) * | 2003-12-30 | 2005-07-05 | 한국건설기술연구원 | Solar heating and domestic hot water system connected with a boiler for home |
| CN101027480A (en) * | 2004-06-23 | 2007-08-29 | 特拉瓦特控股公司 | Method of developing and producing deep geothermal reservoirs |
| CN101484659A (en) * | 2006-03-10 | 2009-07-15 | 动力管柱系统公司 | Expandable tubulars for use in geologic structures |
| CN102137984A (en) * | 2008-08-29 | 2011-07-27 | 哈利伯顿能源服务公司 | Sand control screen assembly and method for use of same |
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| Publication number | Publication date |
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| CN107990294A (en) | 2018-05-04 |
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