CN205561323U - Draw device that utilizes geothermal energy - Google Patents
Draw device that utilizes geothermal energy Download PDFInfo
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- CN205561323U CN205561323U CN201620125927.2U CN201620125927U CN205561323U CN 205561323 U CN205561323 U CN 205561323U CN 201620125927 U CN201620125927 U CN 201620125927U CN 205561323 U CN205561323 U CN 205561323U
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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
- 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
The utility model relates to a draw device that utilizes geothermal energy. The utility model discloses draw device that utilizes geothermal energy includes: pit shaft, outer tube, feed liquor pipe, drain pipe and heat transfer device, the equal opening in top and bottom of pit shaft is equipped with a liquid medium and the geothermol power source bed is deepened to the bottom of pit shaft in pit shaft and the outer tube, the bottom opening is sealed at the top of outer tube, in the pit shaft was located to the fixed cover of outer tube, the upper portion of outer tube was the heat transfer section, and the middle part of outer tube is the soaking zone, and the outer tube lower part is heat absorption section, and heat absorption section is located the geothermol power source bed, be equipped with heat transfer device with the outside that corresponds the position of the heat transfer section of outer tube, the one end of drain pipe links to each other with the liquid outlet of outer tube, and the other end is connected with the heating system's of outside inlet, the bottom of feed liquor pipe go out that top that the liquid end passed the outer tube is stretched into to the pit shaft in and with liquid medium intercommunication, the top and the heating system's of outside the liquid outlet of feed liquor pipe are connected. The utility model has the advantages of thermal efficiency height, simple structure, with low costs.
Description
Technical field
This utility model relates to field of new energy utilization, particularly relates to the device of a kind of extraction and application geothermal energy.
Background technology
At present, green energy resource is all being found in the whole world.Solar energy, wind energy are the most universal, and geothermal energy also result in the extensive concern of people.Geothermal energy resources are broadly divided into hot water type and xeothermic lithotype, and wherein, middle high temperature hot dry rock stratum or high gradient ground temperature stratum, reserves on earth are the abundantest.But, the exploitation of ground thermal technology is the most unsatisfactory.
Because hot dry rock does not have permeability and do not has hole, the characteristics such as reservoir position is deep, current technology mostly is artificial pressure break and manufactures formation fracture, the method utilizing water filling output.Typically require multiple wells with the use of, such as, injecting the relatively low water of well high pressure implantation temperature, making water along the artificial flow in fracture of rock；Bore one or more wells to be used for reclaiming high-temperature water, vapour etc. in another location simultaneously.Expend more and also exist that utilization ratio is low, equipment is complicated, high in cost of production problem, being in particular in: underground heat extraction efficiency is typically at about 1-5%, and underground heat exchange loss fluid rate is high (about between 7%-12%).Therefore, the geothermal energy extractive technique of a kind of efficiency height, simple in construction, low cost it is badly in need of.
Utility model content
In view of the problem existing for prior art, this utility model provides the device and method of a kind of extraction and application geothermal energy, may be used for the area that underground hot dry rock is regional or geothermal gradient is higher and realize the large area exploitation of geothermal energy, there is efficiency height, simple in construction, low cost and other advantages.
The technical scheme that this utility model solves above-mentioned technical problem is as follows:
A kind of device of extraction and application geothermal energy, including: pit shaft, outer tube, feed tube, drain pipe and heat-exchanger rig；The equal opening in the top of pit shaft and bottom, and in depth thermal source rock stratum, the bottom of pit shaft, described pit shaft and outer tube are built with first liquid medium；
The top seal of outer tube, bottom opening；Described outer tube sleeve is located in pit shaft, and described outer tube is fixed with pit shaft by cementing concrete ring, and the top of described outer tube is heat exchanging segment, and the middle part of described outer tube is soaking zone, and the bottom of described outer tube is endotherm section, and described endotherm section is positioned at geothermal source rock stratum；The outside of the position corresponding with outer tube heat exchanging segment is provided with heat-exchanger rig, and described heat-exchanger rig is built with second liquid medium；
One end of described drain pipe connects with the inside of outer tube, and the other end of described drain pipe is connected with the inlet of outside heating system；
The lower end of described feed tube stretches to below outer tube bottom or bottom and is connected with first liquid medium from the top of outer tube, and the upper end of described feed tube is connected with the liquid outlet of outside heating system.
The beneficial effects of the utility model are: arrange outer tube in pit shaft, it it is soaking zone in the middle part of outer tube, the top of outer tube is radiating segment, the bottom of outer tube is endotherm section, the placement degree of depth of outer tube, can determine with the characteristic of thermal source section stratum, base area rock of borehole, if geothermal source rock stratum is high density tight stratum, pit shaft is fairly regular, and the bottom of outer tube can be placed on below the top of geothermal source rock stratum.This kind of design can save the consumption of outer tube, expands the mineshaft diameter of endotherm section simultaneously, and heat absorption efficiency can significantly improve.First liquid medium in pit shaft and outer tube is after the high-temperature heating of geothermal source rock stratum, partially liq undergoes phase transition, become steam molecule, produce high-temperature steam air-flow, to the top rapid increase of pit shaft, the state of the warm-up movement of disorder it is in due to steam molecule, colliding with the tube wall of outer tube and the liquid level of first liquid medium, some vapor molecule returns to first liquid medium, along with persistently carrying out of evaporation, steam molecule density in outer tube constantly increases, and finally reaches saturation.The top seal of outer tube, makes the pressure in outer tube increase, and temperature rises.And due to the setting of soaking zone so that in steam molecule transmittance process, heat loss is almost nil.After saturated vapor reaches steady statue, in pit shaft the top of first liquid medium and the temperature of bottom substantially close to.When the heat of a part of saturated vapor is transferred to radiating segment, the second liquid medium in heat exchanging device heats, can be used for after second liquid medium ebuillition of heated generating electricity, heat supply etc. all for needing the occasion of thermal source.Some saturated vapor passes through drain pipe, is delivered in the heating system of outside for heat supply.Simultaneously, feed tube one end is connected with outside heating system, and the other end of feed tube is connected with the inside of outer tube, the medium (such as water) that the relative temperature that makes heating system produce by the setting of feed tube is relatively low, enter back into outer tube, be circulated utilization by high-pressure pump.
In said process, if heat time heating time is shorter, or when the temperature of geothermal source rock stratum is not the highest, the first liquid medium after outer tube is heated, can be in fluid form directly in drain pipe enters into heating system.
This utility model has only to a pit shaft, feed tube, drain pipe, an outer tube just can realize said process, and floor space is little；Using outer tube or uncased wellbore directly to make first liquid Absorption of Medium underground heat, it is not necessary to other conduction material transferring heat energy, first liquid medium heated surface area is big, and heat absorption rate substantially increases.
This utility model extracts the technology of geothermal energy, and extraction geothermal energy is more than 90 percent, and heat loss is below 10.
Therefore, the device of extraction and application geothermal energy described in the utility model, there is simple in construction, low cost, heat production advantages of higher.Either generating or heat supply, all without output and the injection of subsoil water, be truly realized pollution-free and zero-emission.
On the basis of technique scheme, this utility model can also do following improvement.
Further, described endotherm section also includes the pit shaft corresponding with height densification thermal source layer position.
Preferably, described endotherm section can be the bottom of outer tube, it is also possible to be the barefoot interval of high fine and close thermal source layer.
Further, the bottom of described soaking zone is positioned at geothermal source rock stratum, and the top of described soaking zone is positioned at the lower section of heat-exchanger rig.
Use above-mentioned further scheme to provide the benefit that: endotherm section is uncased wellbore, can more energy efficiency, the bottom of soaking zone is positioned at the lower section at the top of geothermal source rock stratum, it is to avoid thermal loss；The top of described soaking zone is positioned at the lower section of heat-exchanger rig, is conducive to strengthening heat exchange.
Further, feed generating equipment after the heated boiling of the second liquid medium in described heat-exchanger rig and/or heating plant uses.
Above-mentioned further scheme is used to provide the benefit that: the demands such as generating, heat supply can be met.
Further, the top of described outer tube is provided with thermometer.
Above-mentioned further scheme is used to provide the benefit that: to be easy to the temperature monitoring in outer tube at any time.
Further, described geothermal source rock stratum is hot dry rock stratum or High-geotemperature gradient stratum.
Using above-mentioned further scheme to provide the benefit that: the temperature on hot dry rock or high gradient ground temperature stratum is higher, general temperature is at 150 degrees Celsius to 500 degrees Celsius, and reserves on earth are the abundantest.
Further, the boiling point of described first liquid medium is higher than the boiling point of second liquid medium.
Above-mentioned further scheme is used to provide the benefit that: to be conducive to quickly second liquid medium being heated to boiling temperature, even second liquid medium is heated into saturated vapor.
Further, described drain pipe and feed tube are equipped with high-pressure pump.
Above-mentioned further scheme is used to provide the benefit that: to be conducive to accelerating the circulation of whole system medium.
Further, described feed tube stretches into the lower section that one end of first liquid medium is positioned at the bottom of outer tube.
Above-mentioned further scheme is used to provide the benefit that: the first liquid medium making temperature relatively low is directly adjacent to the region of geothermal source rock stratum, it is simple to quickly heat.
Further, one end that described drain pipe connects with the inner tip of outer tube is positioned at the top of heat-exchanger rig, it is to avoid the acting of impact generating heat-exchanger rig.
Above-mentioned further scheme is used to provide the benefit that: the steam produced after the heating of first liquid medium, owing to density is higher, can spread to the top of outer tube, the liquid outlet of drain pipe it is provided above at heat-exchanger rig, on the premise of ensureing generating thermal heat exchange acting, first liquid medium can be delivered to the heating system of outside.
Further, the part of the tube wall correspondence endotherm section of described feed tube is provided with multiple liquid outlet.
Preferably, described feed tube is positioned at outer tube bottom or geothermal source rock stratum height densification uncased wellbore part, is provided with multiple liquid outlet on tube wall.
Use above-mentioned further scheme to provide the benefit that: by the setting of multiple liquid outlets, it is simple to the liquid medium of the inside of feed tube, to quickly diffuse to outer tube, be conducive to improving heat exchanger effectiveness further.
Further, the soaking zone of described outer tube also includes the heat-insulation layer being wrapped in outside pipe.
For the material of heat-insulation layer, can be with the relatively low insulation material of prioritizing selection heat conductivity, such as: expanded materials such as polyurethane etc..
Use above-mentioned further scheme to provide the benefit that: by the setting of heat-insulation layer, it is possible to reduce the loss of heat, improve the extraction efficiency of underground heat.
Further, the soaking zone of described outer tube also includes inner tube, and inner tube is sheathed on outer tube, and the top of inner tube and bottom are sealed with outer tube wall by memory metal sealing ring respectively, form airtight vacuum chamber between said inner tube and outer tube.
Use above-mentioned further scheme to provide the benefit that: outer tube and inner tube are set in pit shaft, form double-layer vacuum outer lumen and be incubated, the degree of depth that outer tube is placed, can be according to the featured configuration of borehole wall peripheral part rock.First liquid medium in pit shaft, after the high-temperature heating of geothermal source rock stratum, partially liq medium undergoes phase transition, and becomes steam molecule, produce high-temperature steam air-flow, to the top rapid increase of pit shaft, owing to steam molecule is in the warm-up movement state of disorder, and the liquid level of the tube wall of outer tube and first liquid medium collides, some vapor molecule returns to first liquid medium, along with persistently carrying out of evaporation, the steam molecule density in outer tube constantly increases, and finally reaches saturation.Pressure in outer tube increases, and temperature rises.And the setting being incubated due to external thermal insulation or the vacuum chamber of outer tube so that heat insulation effect is fine, and heat loss is almost nil.After saturated vapor reaches steady statue, in pit shaft the top of first liquid medium and the temperature of bottom substantially close to, further the second liquid medium in heat exchanging device heats, after second liquid boils for generating electricity, heat supply etc. all for needing the occasion of thermal source.
Further, the material of described sealing ring is memorial alloy.
Using above-mentioned further scheme to provide the benefit that: during use, it is only necessary to sealing ring is respectively placed in top and the bottom of inner tube, memorial alloy produces after being heated and expands, and is formed and seals, has the advantages such as simple, the good sealing effect of use.
This utility model also provides for a kind of method of extraction and application geothermal energy, comprises the following steps:
1) by ground to the drilling well of geothermal source rock stratum, pit shaft, in depth thermal source rock stratum, the bottom of pit shaft are formed；
2) being placed in pit shaft by outer tube, the top of described outer tube is heat exchanging segment, and the middle part of outer tube is soaking zone, and the bottom of outer tube is endotherm section, and endotherm section is positioned at geothermal source rock stratum；The top seal of outer tube, the bottom opening of outer tube；Cementing concrete ring is utilized to fix between outer tube and pit shaft；
3) in outer tube, first liquid medium is added；
4) installing heat-exchanger rig at the heat exchanging segment of outer tube, heat-exchanger rig is built with second liquid medium；
5) entrance of the outlet of heat-exchanger rig with generating equipment and/or heating plant is connected；
6) feed tube and drain pipe are installed: set liquid outlet in the rational position of outer tube, liquid outlet connects with the inner tip of outer tube, one end of described drain pipe is connected with the inlet of outside heating system, and the other end of described drain pipe is connected with the liquid outlet of outer tube；One end of described feed tube stretches to below outer tube bottom or bottom through the top of outer tube and is connected with first liquid medium, and the other end of described feed tube is connected with the liquid outlet of outside heating system.
Above-mentioned further scheme is used to provide the benefit that: the method for extraction and application geothermal energy described in the utility model is simple to operate, it is only necessary to a pit shaft just can complete said process, and floor space is little；Using the barefoot interval heat absorption of outer tube endotherm section or high tight stratum, directly make first liquid medium accept underground heat, it is not necessary to other conduction material transferring heat energy, under this environment, first liquid medium heated surface area is big.Therefore, the device of extraction and application geothermal energy described in the utility model, there is simple in construction, low cost, heat production advantages of higher.Either generating or heat supply, all without output and the injection of subsoil water, be truly realized pollution-free and zero-emission.
Accompanying drawing explanation
Fig. 1 is the profilograph (having vacuum chamber) of the device of extraction and application geothermal energy described in the utility model；
Fig. 2 is the device of extraction and application geothermal energy described in the utility model sectional view (having vacuum chamber) at A-A；
Fig. 3 is the profilograph (having heat-insulation layer) of the device of extraction and application geothermal energy described in the utility model；
Fig. 4 is the device of extraction and application geothermal energy described in the utility model sectional view (having heat-insulation layer) at A-A.
In accompanying drawing, the list of parts representated by each label is as follows:
1, thermometer, 2, outer tube, 3, generating equipment, 4, cementing concrete ring, 5, inner tube, 6, sealing ring, 7, pit shaft, 8, heating system, 9, heat-exchanger rig, 10, heat-insulation layer, 11, feed tube, 12, drain pipe, 13, ground surface, 14, general stratum, 15, geothermal source rock stratum, 16, vacuum chamber.
Detailed description of the invention
Being described principle of the present utility model and feature below in conjunction with accompanying drawing, example is served only for explaining this utility model, is not intended to limit scope of the present utility model.
As Figure 1-4, the device of a kind of extraction and application geothermal energy, including: pit shaft 7, outer tube 2, feed tube 11, drain pipe 12 and heat-exchanger rig 9；The equal opening in the top of pit shaft 7 and bottom, and in depth thermal source rock stratum 15, the bottom of pit shaft 7, described pit shaft 7 is interior and outer tube 2 is built with first liquid medium；
The top seal of outer tube 2, bottom opening；Described outer tube 2 is sheathed in pit shaft 7, described outer tube 2 is fixed with pit shaft 7 by cementing concrete ring 4, the top of described outer tube 2 is heat exchanging segment, the middle part of described outer tube 2 is soaking zone, the bottom of described outer tube 2 is endotherm section, and described endotherm section is positioned at geothermal source rock stratum 15, for absorbing the heat of geothermal source rock stratum 15, if geothermal source rock stratum 15 is high fine and close thermal source layer, endotherm section also includes the pit shaft that high fine and close thermal source layer is corresponding；Being provided with heat-exchanger rig 9 with the outside of the heat exchanging segment correspondence position of outer tube 2, described heat-exchanger rig 9 is built with second liquid medium.
This utility model there is no the restriction of design parameter for top, middle part and the bottom of outer tube, time specifically used, can specifically arrange the length distance of top, middle part and bottom according to actual situation.
One end of described drain pipe 12 connects with the inside of outer tube 2, and the other end of described drain pipe 12 is connected with the inlet of outside heating system；
The lower end of described feed tube 11 stretches to below outer tube 2 bottom or bottom and is connected with first liquid medium from the top of outer tube 2, and the upper end of described feed tube 11 is connected with the liquid outlet of outside heating system.
The bottom of described soaking zone is positioned at the lower section at the top of geothermal source rock stratum 15, and the top of described soaking zone is positioned at the lower section of heat-exchanger rig 9.
For generating equipment 3/ or heating plant after the heated boiling of second liquid medium in described heat-exchanger rig 9.
The top of described outer tube 2 is provided with thermometer 1；Described geothermal source rock stratum 15 is xeothermic rock stratum or high gradient ground temperature stratum；The boiling point of described first liquid medium is higher than the boiling point of second liquid medium.
The liquid outlet of described feed tube 11 stretches into the lower section that one end of first liquid medium is positioned at the bottom of outer tube 2；One end that described drain pipe 12 connects with the inside of outer tube 2 is positioned at the top of heat-exchanger rig 9.
The part of the tube wall correspondence endotherm section of described feed tube is provided with multiple liquid outlet.
Feed tube 11 and drain pipe 12 are equipped with high-pressure pump, for the circulation of accelerating medium.
Two kinds of set-up modes are had for soaking zone.
A kind of mode is that the soaking zone of described outer tube 2 also includes the heat-insulation layer 10 being wrapped in outside outer tube 2.
Another way is, it is internal that the soaking zone of described outer tube 2 also includes that inner tube 5, inner tube 5 are sheathed on outer tube 2, and the top of inner tube 5 and bottom are sealed with outer tube 2 by sealing ring 6 respectively, form airtight vacuum chamber 16 between said inner tube 5 and outer tube 2.The material of described sealing ring 6 is memorial alloy.
The method utilizing said apparatus extraction and application geothermal energy, comprises the following steps:
1) by ground to geothermal source rock stratum 15 drilling well, pit shaft 7, in depth thermal source rock stratum 15, the bottom of pit shaft 7 are formed；
2) being placed in pit shaft 7 by outer tube 2, the top of described outer tube 2 is heat exchanging segment, and the middle part of outer tube 2 is soaking zone, and the bottom of outer tube 2 is endotherm section, and endotherm section is positioned at geothermal source rock stratum 15；
The nature of ground of thermal source rock stratum, base area 15 determines the outer tube 2 position at pit shaft, when geothermal source rock stratum 15 is usually (referring to the situation in addition to tight formation) in the case of thermal source rock stratum, and the bottom of outer tube 2 is arranged near the bottom of pit shaft 7；When geothermal source rock stratum 15 is high tight formation, such as during granite, a segment distance is left in the bottom of the bottom of outer tube 2 and pit shaft 7, and now, endotherm section also includes the pit shaft part of geothermal source rock stratum 15 correspondence；
The top seal of outer tube 2, the bottom opening of outer tube 2 is also positioned at geothermal source rock stratum 15；Cementing concrete ring 4 is utilized to fix between outer tube 2 and pit shaft 7；
3) adding first liquid medium in the outer tube 2 in pit shaft, the consumption of first liquid medium, formation thickness and temperature according to endotherm section determine；Concrete determination method is referred to the conventional Calculation Method of this area；
4) installing heat-exchanger rig 9 at the heat exchanging segment of outer tube 2, heat-exchanger rig 9 is built with second liquid medium；
5) outlet of heat-exchanger rig 9 is connected with the entrance of generating equipment 3/ or heating plant；
6) installing feed tube 11 and drain pipe 12: one end of described drain pipe 12 connects with the inner tip of outer tube 2, one end of described drain pipe 12 is connected with the inlet with outside heating system；One end of described feed tube 11 stretches to outer tube 2 bottom through the top of outer tube 2 and connects with first liquid medium, and the other end of described feed tube 11 is connected with the liquid outlet of outside heating system.
This utility model does not has particular restriction for cementing concrete ring, as long as can be fixed in pit shaft by outer tube, when being embodied as, can use the cementing concrete ring of reinforcing oil well cement material.
This utility model for drilling technology without particular restriction, generally, including geological logging, nature of ground confirmation, geophysical log, underground construction operation, outer tube, inner tube installation etc..Suitable drilling technology can be selected according to concrete practical situation.
This utility model without particular restriction, can be turbine LP rotors, screw expander generating set for generating equipment.
This utility model for heating, supplying hot water equipment is without special restriction, the connected mode of pipeline can be selected according to specific circumstances, one or more corresponding heating, supplying hot water equipment are set, take parallel connection, series connection and other connected modes, various control parts, detection part are set at pipeline, such as: valve, effusion meter etc..
The device and method of extraction and application geothermal energy described in the utility model is not limited only to the purposes such as above-mentioned heating, heat supply, generating, it is adaptable to all occasions relevant to heat.
High temperature resistant, high pressure resistant and corrosion resistant material can be selected as the material of outer tube, such as J55 special steel.
Fig. 1-4 of the present utility model is served only for illustrating the structure of technical solutions of the utility model, does not represent proportionate relationship and design parameter, the specification of device described in the utility model, the parameter of reality, can carry out suitable selection according to practical situation.
Below by two embodiments, the technical solution of the utility model is described in detail.
Embodiment 1
As depicted in figs. 1 and 2, the device of a kind of extraction and application geothermal energy, including: pit shaft 7, outer tube 2, feed tube 11, drain pipe 12 and heat-exchanger rig 9；The equal opening in the top of pit shaft 7 and bottom, and in depth thermal source rock stratum 15, the bottom of pit shaft 7, described pit shaft 7 and outer tube 2 are built with first liquid medium；
The top seal of outer tube 2, bottom opening, the top of described outer tube 2 is provided with thermometer 1, for the convenient temperature observed within outer tube 2；Described outer tube 2 is sheathed in pit shaft 7, described outer tube 2 is fixed by cementing concrete ring 4 with pit shaft 7, the material of described cementing concrete ring 4 is reinforcing oil well cement, the top of described outer tube 2 is heat exchanging segment, and the middle part of described outer tube 2 is soaking zone, and the bottom of described outer tube 2 is endotherm section, if geothermal source rock stratum 15 is high fine and close thermal source layer, endotherm section also includes the pit shaft that high fine and close thermal source layer is corresponding, if geothermal source rock stratum 15 is not high densification thermal source layer, endotherm section is the bottom of outer tube 2；Being provided with heat-exchanger rig 9 with the corresponding position of outer tube 2 heat exchanging segment, described heat-exchanger rig 9 is built with second liquid medium.Second liquid medium in described heat-exchanger rig 9, for generating equipment 3/ or heating plant after heated boiling.The boiling point of second liquid medium is less than the boiling point of first liquid medium, and such as first liquid medium is water, and second liquid medium is freon etc..
When being connected with generating equipment 3 or heating plant for heat-exchanger rig 9, suitable pipeline can be used to be attached, it is possible to further on pipeline, valve etc. is set and controls parts, be easy to open or close.
Heat-exchanger rig 9, can also be connected with generating equipment 3 or heating plant by pipeline, and form the pipeline of circulation, the hot water of heat-exchanger rig 9 generation or steam, for generating equipment or heating plant, generating equipment or heating plant, the temperature of generation compares relatively low medium, is re-fed in heat-exchanger rig 9.
The bottom of described soaking zone is positioned at the lower section at the top of thermal source rock stratum, and the top of described soaking zone is positioned at the lower section of heat-exchanger rig 9, is reduced the loss of heat as far as possible by such setting.It is internal that the soaking zone of described outer tube 2 also includes that inner tube 5, inner tube 5 are sheathed on outer tube 2, and the top of inner tube 5 and bottom are sealed with outer tube 2 by the sealing ring 6 of memorial alloy material respectively, between said inner tube 5 and outer tube 2, form airtight vacuum chamber 16.Inventor is found surprisingly that under study for action, and when the diameter of pit shaft 10 cm bigger than the diameter of outer tube, the when of bigger than the diameter of inner tube 1-5 centimetre of the diameter of outer tube, the effect of soaking zone insulation is especially good.
One end of described drain pipe 12 connects with the inside of outer tube 2, and this end is positioned at the top of heat-exchanger rig 9, at the top of outer tube 2, and is provided with drainage screen for impurity screening in the junction of drain pipe 12 with outer tube 2；The other end of described drain pipe 12 is connected with the inlet of outside heating system 8.
Feed tube 11 and drain pipe 12 are equipped with high-pressure pump, for the circulation of accelerating medium.
The lower end of described feed tube 11 passes and stretches to from the top of outer tube 2 the first liquid medium in pit shaft, and this end is positioned at below bottom or the bottom of outer tube 2；The other end of described feed tube 11 is connected with the liquid outlet of outside heating system 8.The position that the tube wall of described feed tube 11 is corresponding with endotherm section is provided with multiple liquid outlet.Liquid outlet is circular, and multiple liquid outlets are uniformly distributed on tube wall, and inventor is found surprisingly that under study for action, and when aperture is 1cm, and the adjacent distance between hole is 2-10cm, outlet effect is especially good, and the effect of heat exchange is the most especially good.
The method utilizing said apparatus extraction and application geothermal energy, comprises the following steps:
1) by ground surface 12 to geothermal source rock stratum 15 drilling well, form pit shaft 7, the stratum that pit shaft 7 is corresponding from top to bottom is respectively ground surface 13, general stratum 14, geothermal source rock stratum 15 (such as: hot dry rock stratum or high gradient ground temperature stratum), in depth thermal source rock stratum 15, the bottom of pit shaft 7, the bottom of pit shaft 7 connects with geothermal source rock stratum 15.
2) outer tube 2 is placed in pit shaft 7, geothermal source rock stratum 15 is stretched in the bottom of outer tube 2, the nature of ground of thermal source rock stratum, base area 15, determine the bottom of outer tube 2 degree of depth in pit shaft 7, if geothermal source rock stratum 15 is that in the case of general thermal source rock stratum (referring to the situation in addition to high tight formation), the bottom of outer tube 2 is near the bottommost of pit shaft 7, now, endotherm section is the bottom of outer tube 2, i.e. outer tube 2 is followed successively by radiating segment, soaking zone, endotherm section from top to bottom；When geothermal source rock stratum 15 is high tight formation, such as granite, and when the borehole wall is fairly regular, now, endotherm section also includes that a segment distance is left in the bottom of the pit shaft part being positioned at geothermal source rock stratum 15, the bottom of outer tube 2 and pit shaft 7, and the degree of the biggest energy efficiency of distance is the highest.The size of this distance, depends on the thickness on high fine and close thermal source stratum, can be contour with height densification heat source layer thickness.
3) outer tube 2 in pit shaft 7 adds first liquid medium.
4) will seal with cementing concrete ring between outer tube 2 and pit shaft 7, make outer tube 2 and pit shaft 7 fix.
5) inner tube 5 being placed in outer tube 2, inner tube 5 bottom is positioned at below the top of endotherm section, between the sidewall of inner tube 5 and outer tube 2, forms airtight vacuum chamber 16；The top of inner tube 5 and bottom are sealed by the tube wall of ring-type memorial alloy sealing ring 6 with outer tube 2 respectively.The bottom of inner tube 5 is positioned under top, geothermal source rock stratum 15, or the bottom of inner tube 5 flushes with top, geothermal source rock stratum 15.
6) by the top seal of outer tube 2, installing heat-exchanger rig 9 at the heat exchanging segment of outer tube 2, heat-exchanger rig 9 is built with second liquid medium, and the heat-transfer surface of heat-exchanger rig 9 is corresponding with the heat exchanging segment of outer tube 2；
7) outlet of heat-exchanger rig 9 is connected with the entrance of generating equipment 3/ or heating plant.
8) installing feed tube 11 and drain pipe 12: one end of described drain pipe 12 connects with the inner tip of outer tube 2, the other end of described drain pipe 12 is connected with the inlet of outside heating system 8；One end of described feed tube 11 stretches to pit shaft bottom through the top of outer tube 2 and connects with first liquid medium, and the other end of described feed tube 11 is connected with the liquid outlet of outside heating system 8.
Operation principle: the first liquid medium in pit shaft, after the high-temperature heating of geothermal source rock stratum 15 seethes with excitement, partially liq undergoes phase transition, and becomes steam molecule, produces high-temperature steam air-flow.This air-flow is to the top rapid increase of pit shaft, owing to steam molecule is in the warm-up movement state of disorder, collide with the tube wall of outer tube and the liquid level of first liquid medium, some vapor molecule returns to first liquid medium, along with persistently carrying out of evaporation, steam molecule density in sleeve pipe constantly increases, and finally reaches saturation.The top seal of sleeve pipe, makes the pressure in sleeve pipe increase, and temperature rises.And due to the setting of soaking zone so that steam molecule heat loss in transmittance process is almost nil.After saturated vapor reaches steady statue, the top of first liquid medium in pit shaft and the temperature of bottom substantially close to, when heat is transferred to radiating segment, further the second liquid medium in heat exchanging device heats, after second liquid boils for generating electricity, heat supply etc. all for needing the place of thermal source.Meanwhile, the steam molecule after heating, through drain pipe in outside heating system；The relatively low water of temperature that heating system produces, the bottom in feed tube enters into outer tube, utilize high-pressure pump to be circulated heating.
Embodiment 2
As shown in Figure 3 and Figure 4, the device of a kind of extraction and application geothermal energy, including: pit shaft 7, outer tube 2, feed tube 11, drain pipe 12 and heat-exchanger rig 9；The equal opening in the top of pit shaft 7 and bottom, and in depth thermal source rock stratum 15, the bottom of pit shaft 7, the outer tube 2 in described pit shaft 7 is equipped with first liquid medium；
The top seal of outer tube 2, bottom opening, the top of described outer tube 2 is provided with thermometer 1, for the convenient temperature observed within outer tube 2；Described outer tube 2 is sheathed in pit shaft 7, described outer tube 2 is fixed by cementing concrete ring 4 with pit shaft 7, the material of described cementing concrete ring 4 is reinforcing oil well cement, the top of described outer tube 2 is heat exchanging segment, the middle part of described outer tube 2 is soaking zone, the bottom of described outer tube 2 is endotherm section, and endotherm section is positioned at geothermal source rock stratum 15, if geothermal source rock stratum 15 is high fine and close thermal source
Layer, endotherm section also includes the pit shaft that high fine and close thermal source layer is corresponding, if geothermal source rock stratum 15 is not high densification thermal source layer, endotherm section is that the bottom of outer tube 2, i.e. outer tube are followed successively by radiating segment, soaking zone and endotherm section from top to bottom；Being provided with heat-exchanger rig 9 with the correspondence position of the heat exchanging segment of outer tube 2, described heat-exchanger rig 9 is built with second liquid medium.Second liquid medium in described heat-exchanger rig 9, for generating equipment 3/ or heating plant after heated boiling.The boiling point of second liquid medium is less than the boiling point of first liquid medium, and such as first liquid medium is water, and second liquid medium is freon etc..
For heat-exchanger rig 9, when being connected with generating equipment 3 or heating plant, suitable pipeline can be used to be attached, it is possible to valve etc. to be further set on pipeline and controls parts, be easy to open or close.
Heat-exchanger rig 9, can also be connected and be formed the pipeline of circulation with generating equipment 3 or heating plant by pipeline, the hot water of heat-exchanger rig 9 generation or steam, for generating equipment or heating plant, generating equipment or heating plant, the temperature of the generation relatively low medium that compares is re-fed in heat-exchanger rig 9.
Described endotherm section is positioned at the whole of the geothermal source rock stratum 15 of pit shaft, and the bottom of soaking zone is positioned at the lower section at the top of geothermal source rock stratum 15, and the top of described soaking zone is positioned at the lower section of heat-exchanger rig 9.The soaking zone of described outer tube 2 also includes the heat-insulation layer 10 being wrapped in outside outer tube 2, and the material of heat-insulation layer 10 is the expanded materials such as polyurethane.
One end of described drain pipe 12 connects with the inner tip of outer tube 2, and this end is positioned at the top of heat-exchanger rig 9, at the top of outer tube 2, and is provided with drainage screen for impurity screening in the junction of drain pipe 12 with outer tube 2；The other end of described drain pipe 12 is connected with the inlet of outside heating system 8.
One end of described feed tube 11 stretches to below the bottom of outer tube or bottom and connects with first liquid medium through the top of outer tube 2, and this end is positioned at the bottom of outer tube 2 until shaft bottom；The other end of described feed tube 11 is connected with the liquid outlet of outside heating system 8.The part of the tube wall correspondence endotherm section of described feed tube 11 is provided with multiple liquid outlet.Liquid outlet is circular, and multiple liquid outlets are uniformly distributed on tube wall, and inventor is found surprisingly that under study for action, and when aperture is 1cm, and the adjacent distance between hole is 2-10cm, outlet effect is especially good, and the effect of heat exchange is the most especially good.
Feed tube 11 and drain pipe 12 all can be provided with high-pressure pump, for the circulation of accelerating medium.
The method utilizing said apparatus extraction and application geothermal energy, comprises the following steps:
1) by ground surface 12 to geothermal source rock stratum 15 (hot dry rock stratum or High-geotemperature gradient stratum) drilling well, form pit shaft 7, the stratum that pit shaft 7 is corresponding from top to bottom is respectively ground surface 13, general stratum 14 and geothermal source rock stratum 15, in depth thermal source rock stratum 15, the bottom of pit shaft 7, the inside of pit shaft 7 connects with geothermal source rock stratum 15.
2) outer tube 2 is placed in pit shaft 7, outer wall in the middle part of outer tube 2 wraps up one layer of heat preservation layer 10 in advance, geothermal source rock stratum 15 is stretched in the bottom of outer tube 2, the nature of ground of thermal source rock stratum, base area 15, determining the degree of depth in pit shaft 7 bottom outer tube 2, when geothermal source rock stratum 15 is general stratum (referring to the situation in addition to high tight formation), the bottom of outer tube 2 is near the bottom of pit shaft 7, now, outer tube 2 is followed successively by radiating segment, soaking zone and endotherm section from top to bottom；When geothermal source rock stratum 15 is high tight formation, such as during granite, now, endotherm section also includes that geothermal source rock stratum 15 correspond to the part of pit shaft, a segment distance can be left in the bottom of the bottom of outer tube 2 and pit shaft 7, and the length of this distance can be equal to the thickness of high tight formation.
3) will seal with cementing concrete between outer tube 2 and pit shaft 7, make outer tube 2 and pit shaft 7 fix.
4) outer tube 2 in pit shaft 7 adds first liquid medium.
5) by the top seal of outer tube 2, installing heat-exchanger rig 9 in the outside of the heat exchanging segment of outer tube 2, heat-exchanger rig 9 is built with second liquid medium, and the heat-transfer surface of heat-exchanger rig 9 is corresponding with the heat exchanging segment of outer tube 2.
6) outlet of heat-exchanger rig 9 is connected with the entrance of generating equipment 3/ or heating plant.
7) installing feed tube 11 and drain pipe 12: one end of described drain pipe 12 connects with the inner tip of outer tube 2, the other end of described drain pipe 12 is connected with the inlet of outside heating system 8；Below outer tube 2 bottom or bottom are stretched into until in first liquid medium, the other end of described feed tube 11 is connected with the liquid outlet of outside heating system 8 through the top of outer tube 2 in one end of described feed tube 11.
Operation principle: the first liquid medium in pit shaft, seethe with excitement after the high-temperature heating of geothermal source rock stratum 15, partially liq undergoes phase transition, become steam molecule, produce high-temperature steam air-flow, to the top rapid increase of pit shaft, the state of the warm-up movement of disorder it is in due to steam molecule, collide with the tube wall of outer tube and the liquid level of first liquid medium, some vapor molecule returns to first liquid medium, along with persistently carrying out of evaporation, the steam molecule density in sleeve pipe constantly increases, and finally reaches saturation.The top seal of sleeve pipe, makes the pressure in sleeve pipe increase, and temperature rises.And due to the setting of soaking zone, making steam molecule in transmittance process, heat loss is almost nil, finally reaches saturated-vapor state.After saturated vapor reaches steady statue, in pit shaft the top of first liquid medium and the temperature of bottom substantially close to, when heat is transferred to heat exchanging segment, second liquid medium in heat exchanging device heats further, after second liquid boils, for generating electricity, heat supply etc. all for needing the occasion of thermal source.Meanwhile, the liquid medium after heating, can be in drain pipe be directly used in the heating system of outside；Heating system produces the water that temperature is relatively low, in feed tube enters into outer tube, is circulated heating with high-pressure pump.
The foregoing is only preferred embodiment of the present utility model, not in order to limit this utility model, all within spirit of the present utility model and principle, any modification, equivalent substitution and improvement etc. made, within should be included in protection domain of the present utility model.
Claims (10)
1. the device of an extraction and application geothermal energy, it is characterised in that including: pit shaft (7), outer tube (2), feed tube (11), drain pipe (12) and heat-exchanger rig (9)；The equal opening in top and bottom of pit shaft (7) and in depth thermal source rock stratum (15), bottom of pit shaft (7), described pit shaft (7) is interior and outer tube (2) is built with first liquid medium；
The top seal of outer tube (2), bottom opening；Described outer tube (2) is sheathed in pit shaft (7), described outer tube (2) is fixed with pit shaft (7) by cementing concrete ring (4), the top of described outer tube (2) is heat exchanging segment, the middle part of described outer tube (2) is soaking zone, the bottom of described outer tube (2) is endotherm section, and described endotherm section is positioned at geothermal source rock stratum (15)；Being provided with heat-exchanger rig (9) with the outside of the correspondence position of outer tube (2) heat exchanging segment, described heat-exchanger rig (9) is built with second liquid medium；
One end of described drain pipe (12) connects with the inside of outer tube (2), and the other end of described drain pipe (12) is connected with the inlet of outside heating system；
The lower end of described feed tube (11) stretches to below outer tube (2) bottom or bottom and is connected with first liquid medium from the top of outer tube (2), and the upper end of described feed tube (11) is connected with the liquid outlet of outside heating system.
The device of a kind of extraction and application geothermal energy, it is characterised in that described endotherm section also includes the pit shaft corresponding with height densification thermal source layer position.
The device of a kind of extraction and application geothermal energy, it is characterised in that the bottom of described soaking zone is positioned at geothermal source rock stratum (15), the top of described soaking zone is positioned at the lower section of heat-exchanger rig (9).
The device of a kind of extraction and application geothermal energy, it is characterised in that for generating equipment (3) and/or heating plant after the heated boiling of the second liquid medium in described heat-exchanger rig (9)；The top of described outer tube (2) is provided with thermometer (1)；Described geothermal source rock stratum (15) is xeothermic rock stratum or High-geotemperature gradient stratum；The boiling point of described first liquid medium is higher than the boiling point of second liquid medium.
The device of a kind of extraction and application geothermal energy, it is characterised in that described drain pipe (12) and feed tube (11) are equipped with high-pressure pump.
The device of a kind of extraction and application geothermal energy, it is characterised in that one end that described drain pipe (12) connects with the inside of outer tube (2) is positioned at the top of heat-exchanger rig (9).
The device of a kind of extraction and application geothermal energy, it is characterised in that the part of the tube wall correspondence endotherm section of described feed tube (11) is provided with multiple liquid outlet.
8. according to the device of extraction and application geothermal energy a kind of described in any one of claim 1-7, it is characterised in that the soaking zone of described outer tube (2) also includes being wrapped in the heat-insulation layer (10) that outer tube (2) is outside.
9. according to the device of extraction and application geothermal energy a kind of described in any one of claim 1-7, it is characterized in that, the soaking zone of described outer tube (2) also includes inner tube (5), it is internal that inner tube (5) is sheathed on outer tube (2), the top of inner tube (5) and bottom by the inner wall sealing of sealing ring (6) with outer tube (2), form airtight vacuum chamber (16) respectively between said inner tube (5) and outer tube (2).
The device of a kind of extraction and application geothermal energy, it is characterised in that the material of described sealing ring (6) is memorial alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620125927.2U CN205561323U (en) | 2016-02-17 | 2016-02-17 | Draw device that utilizes geothermal energy |
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| CN201620125927.2U CN205561323U (en) | 2016-02-17 | 2016-02-17 | Draw device that utilizes geothermal energy |
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| CN205561323U true CN205561323U (en) | 2016-09-07 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105674608A (en) * | 2016-02-17 | 2016-06-15 | 姚国敏 | Device and method for extracting and utilizing geothermal energy |
| CN107860145A (en) * | 2017-10-13 | 2018-03-30 | 中国科学院广州能源研究所 | Underground heat individual well free convection enhanced heat exchange system |
| CN109931036A (en) * | 2019-04-18 | 2019-06-25 | 田振林 | The method that underground heat and oil gas are adopted altogether in petroleum or natural gas extraction |
-
2016
- 2016-02-17 CN CN201620125927.2U patent/CN205561323U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105674608A (en) * | 2016-02-17 | 2016-06-15 | 姚国敏 | Device and method for extracting and utilizing geothermal energy |
| CN107860145A (en) * | 2017-10-13 | 2018-03-30 | 中国科学院广州能源研究所 | Underground heat individual well free convection enhanced heat exchange system |
| CN107860145B (en) * | 2017-10-13 | 2019-10-08 | 中国科学院广州能源研究所 | Underground heat individual well free convection enhanced heat exchange system |
| CN109931036A (en) * | 2019-04-18 | 2019-06-25 | 田振林 | The method that underground heat and oil gas are adopted altogether in petroleum or natural gas extraction |
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