CN206785571U - Individual well hot dry rock electricity generation system - Google Patents

Individual well hot dry rock electricity generation system Download PDF

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Publication number
CN206785571U
CN206785571U CN201720300585.8U CN201720300585U CN206785571U CN 206785571 U CN206785571 U CN 206785571U CN 201720300585 U CN201720300585 U CN 201720300585U CN 206785571 U CN206785571 U CN 206785571U
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China
Prior art keywords
heat exchanger
hot dry
plate
dry rock
liquid
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CN201720300585.8U
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Inventor
王效勇
王翔宇
李振函
刘国爱
张建民
李继明
王东
锡景跃
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Dong Chen Hot Dry Rock Heating Co Ltd
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Dong Chen Hot Dry Rock Heating Co Ltd
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/10Geothermal energy

Abstract

The utility model discloses a kind of individual well hot dry rock electricity generation system, including the sleeve pipe being arranged in hot dry rock layer depth well, the bottom end closure of described sleeve pipe, described sleeve pipe inner bottom part is provided with bore hole heat exchanger, described sleeve pipe inner bottom part is inoculated with water, and the bore hole heat exchanger is submerged in water;The top of the bore hole heat exchanger is provided with medium inlet pipe and medium outlet pipe, and the medium outlet pipe is connected to the ground a side-entrance of heat exchanger, and a side outlet of the ground heat exchanger is connected to the medium inlet pipe after high-pressure pump;The secondary side connection generating set of the ground heat exchanger.Individual well hot dry rock electricity generation system of the present utility model, hot dry rock heat energy can be effectively utilized and generated electricity, generated electricity without consuming the non-renewable energy resources such as coal again, saved non-renewable resources.

Description

Individual well hot dry rock electricity generation system
Technical field
Hot dry rock heat energy utilization field is the utility model is related to, specifically, is related to a kind of individual well hot dry rock and generates electricity System.
Background technology
Underground heat heat energy is a kind of inexhaustible regenerative resource, with the development of science and technology, being used as hair by the use of underground heat heat energy The heat energy source of electricity, turns into a kind of development trend.Such as the profit of the heat pump using underground heat heat energy to grow up in recent years With.It in the 2000 meters of xeothermic rock stratum to ten thousand metres in underground, is the internal high temperature rock that fluid or only a small amount of fluid is not present to bury Body, for its temperature at tens degrees Celsius to hundreds of degrees Celsius, containing has huge heat energy, is a kind of regenerative resource of cleaning. But limited by technology, the heat of hot dry rock is not easy to extract, and therefore, is generated electricity always and not had using the heat energy of hot dry rock It is used widely.
Utility model content
Technical problem to be solved in the utility model is:Offer one kind can effectively utilize hot dry rock heat energy and be sent out The individual well hot dry rock electricity generation system of electricity.
In order to solve the above technical problems, the technical solution of the utility model is:
Individual well hot dry rock electricity generation system, including the sleeve pipe being arranged in hot dry rock layer depth well, the bottom end closure of described sleeve pipe, Described sleeve pipe inner bottom part is provided with bore hole heat exchanger, and described sleeve pipe inner bottom part is inoculated with water, and the bore hole heat exchanger is submerged in water;
The top of the bore hole heat exchanger is provided with medium inlet pipe and medium outlet pipe, and the medium outlet pipe is connected to the ground heat exchange Side-entrance of device, a side outlet of the ground heat exchanger are connected to the medium inlet pipe after high-pressure pump;
The secondary side connection generating set of the ground heat exchanger.
Preferably, the generating set is organic Rankine bottoming cycle generating set, including steam turbine, generator, condenser and Working medium pump;
The secondary side outlet of the ground heat exchanger connects the working medium import of the steam turbine, and the working medium of the steam turbine goes out Mouth connects the working medium import of the condenser, the output end connection generator of the steam turbine, the sender property outlet of the condenser The secondary side-entrance of the ground heat exchanger is connected to by the working medium pump.
Preferably, the bore hole heat exchanger includes columnar housing, and the both ends of the housing set end plate respectively, definition The end plate at both ends is respectively first end plate and the second end plate, and the medium inlet pipe and the medium outlet pipe are located at the first end plate On;
In the housing from the first end plate to be disposed between second end plate liquid separation chamber, heat exchanging chamber, with And liquid collecting cavity, the medium inlet pipe are communicated to the liquid separation chamber, heat exchanger tube is provided with the heat exchanging chamber, the one of the heat exchanger tube End is communicated to the liquid separation chamber by liquid separation tube sheet, and the other end of the heat exchanger tube is communicated to the liquid collecting by liquid collecting tube sheet Chamber;
The liquid collecting cavity is communicated to the heat exchanging chamber, the outer peripheral face of the chamber shell of the liquid separation chamber and the madial wall of the housing Between leave annular space, the heat exchanging chamber passes through the annular space and connects the medium outlet pipe.
Preferably, be connected with inner barrel between the first end plate and the liquid separation tube sheet, the first end plate, it is described in Cylinder and the liquid separation tube sheet surround the liquid separation chamber jointly, and the external diameter of the inner barrel is less than the internal diameter of the housing.
Preferably, the heat exchanger tube includes more parallel copper pipes, and gap is left between adjacent copper pipe.
Preferably, the periphery of the liquid collecting tube sheet is fixedly connected with the madial wall of the housing, the liquid collecting tube sheet, described Housing and second end plate surround the liquid collecting cavity jointly.
Preferably, the periphery of the liquid collecting tube sheet is provided with the through hole for connecting the heat exchanging chamber and the liquid collecting cavity.
Preferably, it is provided with gas-liquid separator between the ground heat exchanger and the high-pressure pump.
Preferably, the gas-liquid separator includes separator cavity, and the side of the separator cavity is provided with inlet, institute The bottom for stating separator cavity is provided with liquid outlet, and the top of the separator cavity is provided with exhaust outlet, in the separator cavity The corresponding exhaust ports are provided with ball-cock assembly;
Inclined downward in the separator cavity positioned at the inlet is provided with baffle plate, and tapping is offered on the baffle plate Hole.
Preferably, the baffle plate gradually rises from side to the relative opposite side close to the inlet.
After employing above-mentioned technical proposal, the beneficial effects of the utility model are:
When in use, bore hole heat exchanger is installed in deep-well inner sleeve for individual well hot dry rock electricity generation system of the present utility model Bottom, the water filling in well, water is set not have a bore hole heat exchanger, the water in well absorbs the heat heating of borehole wall dry-hot-rock geothermal, heating Heat transferring medium in bore hole heat exchanger, heat transferring medium flow out from the medium outlet pipe of bore hole heat exchanger, extracted to ground, to conduct The heat source of ground heat exchanger.The cycle fluid of ground heat exchanger heating secondary side generating set, enters hair after working medium heating Group of motors generates electricity.Flow back into by the heat transferring medium after absorption heat by medium inlet pipe in bore hole heat exchanger.Such iterative cycles, Heat transferring medium constantly comes up the underground heat extraction of xeothermic rock stratum, is continuously generated electricity.It is deep because sleeve pipe inner bottom part is closed Water in well will not make the liquid level of the injection water in sleeve pipe keep constant, the water in sleeve pipe is in be absorbed in sleeve pipe The xeothermic rock stratum of heat, ensure that the stable operation of system.This system of the present utility model, can effectively utilize hot dry rock Heat energy is generated electricity, so as to make the utilization of hot dry rock heat energy be promoted use.
In the utility model, bore hole heat exchanger includes liquid separation chamber, heat exchanging chamber and the liquid collecting cavity set gradually, and heat exchange is situated between Matter enters liquid separation chamber by medium inlet pipe, is branched to through liquid separation tube sheet in the heat exchanger tube in heat exchanging chamber, then through liquid collecting tube sheet collection In flowed into liquid collecting cavity, then by liquid collecting cavity in heat exchanging chamber, it is empty subsequently into the annular between liquid separation cavity outer wall and inner walls Gap, carried from the outflow of medium outlet pipe to outside well.In this cyclic process, the heat transferring medium of the low temperature absorption heat-exchange intracavitary in heat exchanger tube Heat transferring medium heat, carry out one-level heating, the cryogenic media after heating enters heat exchanging chamber after liquid collecting cavity is concentrated, changing Hot intracavitary, heat transferring medium are exchanged heat with hull outside by the water of geothermal heating, absorb the heat of underground heat indirectly, carry out the second level and add Heat, heats up into high-temperature medium, then carries to well and utilizes the heat energy for the underground heat drawn outside.Such a structure, by two-stage heat exchange structure, The heat energy of underground heat in well is maximumlly extracted, heat energy extraction efficiency is high.Because housing is cylindrical shape, it is easy to be positioned in well.
In the utility model, gas-liquid separator is provided between ground heat exchanger and high-pressure pump, the liquid containing gas is changed Thermal medium enters in separator cavity from the inlet of gas-liquid separator cavity side, first flows on baffle plate, by the resistance of baffle plate Gear acts on, and gas therein rises to upper space in separator cavity, and liquid heat transferring medium falls from the taphole of baffle plate Lower space to separator cavity.Upper space accumulation of the gas in separator cavity is emitted by exhaust outlet. When the liquid level in separator cavity reaches certain height, ball-cock assembly blocks exhaust outlet, is no longer vented, to ensure system The pressure requirements of operation.By such a mode, after making upper space accumulation of the gas in heat transferring medium in separator cavity Just discharged by exhaust outlet, emitted by the gas in liquid heat transferring medium, while making heat transferring medium gas-liquid separation, energy Enough ensure the operating pressure of system, to ensure the reliability service of system.
Brief description of the drawings
The utility model is described in further detail with reference to the accompanying drawings and examples:
Fig. 1 is the principle schematic of individual well hot dry rock electricity generation system of the present utility model;
Fig. 2 is the structural representation of the bore hole heat exchanger in Fig. 1;
Fig. 3 is the structural representation of the gas-liquid separator in Fig. 1;
Fig. 4 is the theory diagram of the generating set in Fig. 1;
In figure:1- deep-wells;2- sleeve pipes;3- bore hole heat exchangers;31- housings;32- first end plates;33- inner barrels;34- liquid separations Tube sheet;35- liquid separation chambers;36- heat exchanging chambers;37- liquid collecting cavities;38- heat exchanger tubes;39- liquid collecting tube sheets;391- through holes;The ends of 310- second Plate;311- medium inlet pipes;312- medium outlet pipes;313- annular spaces;4- grounds heat exchanger;5- gas-liquid separators;51- separators Cavity;511- inlets;512- liquid outlets;513- exhaust outlets;52- ball-cock assemblys;53- baffle plates;531- tapholes;6- high-pressure pumps; 7- generating sets;71- working medium pumps;72- steam turbines;73- generators;74- condensers.
Embodiment
In order that the purpose of this utility model, technical scheme and advantage are more clearly understood, below in conjunction with accompanying drawing and implementation Example, the utility model is further elaborated.It should be appreciated that specific embodiment described herein is only explaining The utility model, it is not used to limit the utility model.
Reference picture 1 and Fig. 4, individual well hot dry rock electricity generation system of the present utility model, including be arranged in hot dry rock layer depth well 1 Sleeve pipe 2, the bottom end closure of sleeve pipe 2, the inner bottom part of sleeve pipe 2 is provided with bore hole heat exchanger 3, and sleeve pipe inner bottom part is inoculated with water, is exchanged heat in well Device 3 is submerged in water.
The top of bore hole heat exchanger 3 is provided with medium inlet pipe 311 and medium outlet pipe 312, and medium outlet pipe 312, which is connected to the ground, changes Side-entrance of hot device 4, a side outlet of ground heat exchanger 4 are connected to medium inlet pipe 311 after high-pressure pump 6.
The secondary side connection generating set 7 of ground heat exchanger 4, generating set 7 is organic Rankine bottoming cycle generating set, including Steam turbine 72, generator 73, condenser 74 and working medium pump 71.
The working medium import of the secondary side outlet connection steam turbine 72 of ground heat exchanger 4, the sender property outlet connection of steam turbine 72 The working medium import of condenser 74, the output end connection generator 73 of steam turbine 72, the sender property outlet of condenser 74 pass through working medium pump 71 are connected to the ground the secondary side-entrance of heat exchanger 4.Working medium is lower boiling organic matter, such as pentane, and the boiling point of pentane is 10 DEG C between 40 DEG C, and the heat transferring medium in the primary side of ground heat exchanger is extracted on the ground under the heating of bore hole heat exchanger During heat exchanger, temperature can reach 105 DEG C, can ensure the good circulation of organic Rankine cycle power generation system.
Reference picture 2, bore hole heat exchanger 3 can use structure in detail below:Bore hole heat exchanger 3 includes columnar housing 31, The both ends of housing 31 set end plate respectively, and the end plate for defining both ends is respectively the end plate 310 of first end plate 32 and second, first end plate Medium inlet pipe 311 and medium outlet pipe 312 are connected on 32 lateral wall.
In housing 31 from be disposed between the end plate of first end plate 32 to the second 310 liquid separation chamber 35, heat exchanging chamber 36 and Liquid collecting cavity 37, medium inlet pipe 311 are communicated to liquid separation chamber 35, and heat exchanger tube 38 is provided with heat exchanging chamber 36, and heat exchanger tube 38 includes more Parallel copper pipe, gap is left between adjacent copper pipe.One end of heat exchanger tube 38 is communicated to liquid separation chamber 35 by liquid separation tube sheet 34, The other end of heat exchanger tube 38 is communicated to liquid collecting cavity 37 by liquid collecting tube sheet 39.It is connected between first end plate 32 and liquid separation tube sheet 34 Inner barrel 33, inner barrel 33 are used as chamber shell, liquid separation chamber 35, inner barrel 33 are surrounded jointly with first end plate 32 and liquid separation tube sheet 34 External diameter be less than housing 31 internal diameter, leave annular space 313 between the lateral wall of inner barrel 33 and the madial wall of housing 31, change Hot chamber 36 connects medium outlet pipe 312 by annular space 313.
The periphery of liquid collecting tube sheet 39 is fixedly connected with the madial wall of housing 31, liquid collecting tube sheet 39, the end of housing 31 and second Plate 310 surrounds liquid collecting cavity 37 jointly.The periphery of liquid collecting tube sheet 39 is provided with the through hole of connection heat exchanging chamber 36 and liquid collecting cavity 37 391, liquid collecting cavity 37 is communicated to heat exchanging chamber 36 by through hole 391.
In deep-well 1, the heat exchange of the heat transferring medium of low temperature in heat exchanger tube 38 in absorption heat-exchange chamber 36 is situated between bore hole heat exchanger 3 The heat of matter, one-level heating is carried out, the cryogenic media after heating enters heat exchanging chamber 36 after the concentration of liquid collecting cavity 37, in heat exchanging chamber In 36, heat transferring medium absorbs the heat of underground heat, carries out the second level and add indirectly with being exchanged heat outside housing 31 by the water of geothermal heating Heat, heats up into high-temperature medium, then carries to well and utilizes the heat energy for the underground heat drawn outside.Such a endless form, two-step heating is formed, The heat energy of underground heat in well is maximumlly extracted, heat energy extraction efficiency is high.Heat transferring medium can use freon etc..
The height of housing 31 can reach more than more than ten meters, and diameter is small, and height is high, is easy to be positioned in well, passes through above-mentioned two Level heat exchange structure, maximumlly extract the heat energy of underground heat in well., can be because the length of the heat exchanger tube 38 in heat exchanging chamber 36 is longer Set horizontal support (not shown) to fix heat exchanger tube 38 in housing 31, avoid the rocking in use of heat exchanger tube 38.
The bore hole heat exchanger of such a structure, housing 31 are cylindrical shape, it is convenient to are installed on the deep-well as deep as xeothermic rock stratum Interior use, extracting the heat energy of hot dry rock becomes simple and easy, utilizes extensively with can promoting hot dry rock heat energy.
In order to which the gas in the liquid heat transferring medium circulated in side system of system is separated, can exchange heat on the ground Gas-liquid separator 5 is provided between the primary side and high-pressure pump 6 of device 4.To ensure the reliable and stable operation of system.
Reference picture 3, gas-liquid separator 5 can use following structure:Gas-liquid separator 5 includes separator cavity 51, separator The side of cavity 51 is provided with inlet 511, and the bottom of separator cavity 51 is provided with liquid outlet 512, the top of separator cavity 51 Provided with exhaust outlet 513, corresponded in separator cavity 51 and ball-cock assembly 52 is provided with exhaust outlet 513.Ball-cock assembly 52 is used to close closing and opening Open exhaust outlet 513.
Inclined downward in separator cavity 51 positioned at inlet 512 is provided with baffle plate 53, and taphole is offered on baffle plate 53 531。
Baffle plate 53 gradually rises from side to the relative opposite side close to inlet 511.
Separator cavity 51 is corrosion-resistant separator cavity, directly can be made of anti-corrosion material, or in separator chamber The inner surface coating anti-corrosion material of body, baffle plate 53 is the baffle plate of anti-corrosion material.The gas-liquid separator of such a structure when in use, contains The liquid heat transferring medium for having gas enters in separator cavity 51 from the inlet 511 of the side of separator cavity 51, first flows to gear On plate 53, under the barrier effect of baffle plate 53, gas therein rises to upper space, liquid heat exchange in separator cavity 51 Medium drops down onto the lower space in separator cavity 51 under the taphole 531 of baffle plate 53.Gas is in separator cavity 51 Upper space accumulation is emitted by exhaust outlet 513.When the liquid level in separator cavity 51 reaches certain height, Ball-cock assembly 52 blocks exhaust outlet, is no longer vented, to ensure the pressure requirements of system operation.By such a mode, make heat transferring medium In gas in separator cavity 51 upper space accumulation after just discharged by exhaust outlet, by liquid heat transferring medium Gas emits, and while making heat transferring medium gas-liquid separation, can ensure the operating pressure of system, to ensure the reliable of system Operation.
Citing described above for the utility model preferred forms, wherein the part do not addressed in detail is this area The common knowledge of those of ordinary skill.The scope of protection of the utility model is defined by the content of claim, any to be based on this reality The equivalent transformation carried out with new technical inspiration, also within the scope of protection of the utility model.

Claims (9)

1. individual well hot dry rock electricity generation system, it is characterised in that:Including the sleeve pipe being arranged in hot dry rock layer depth well, described sleeve pipe Bottom end closure, described sleeve pipe inner bottom part are provided with bore hole heat exchanger, and described sleeve pipe inner bottom part is inoculated with water, and the bore hole heat exchanger submerges In water;
The top of the bore hole heat exchanger is provided with medium inlet pipe and medium outlet pipe, and the medium outlet pipe is connected to the ground heat exchanger Side-entrance, a side outlet of the ground heat exchanger are connected to the medium inlet pipe after high-pressure pump;
The secondary side connection generating set of the ground heat exchanger;
The generating set is organic Rankine bottoming cycle generating set, including steam turbine, generator, condenser and working medium pump;
The secondary side outlet of the ground heat exchanger connects the working medium import of the steam turbine, and the sender property outlet of the steam turbine connects The working medium import of the condenser, the output end connection generator of the steam turbine are connect, the sender property outlet of the condenser passes through The working medium pump is connected to the secondary side-entrance of the ground heat exchanger.
2. individual well hot dry rock electricity generation system according to claim 1, it is characterised in that:The bore hole heat exchanger includes cylinder The housing of shape, the both ends of the housing set end plate respectively, and the end plate for defining both ends is respectively first end plate and the second end plate, institute Matter inlet pipe and the medium outlet pipe are given an account of in the first end plate;
In the housing liquid separation chamber, heat exchanging chamber, Yi Jiji are disposed with from the first end plate between second end plate Sap cavity, the medium inlet pipe are communicated to the liquid separation chamber, heat exchanger tube are provided with the heat exchanging chamber, and one end of the heat exchanger tube leads to Cross separating tube plate and be communicated to the liquid separation chamber, the other end of the heat exchanger tube is communicated to the liquid collecting cavity by liquid collecting tube sheet;
The liquid collecting cavity is communicated to the heat exchanging chamber, between the outer peripheral face of the chamber shell of the liquid separation chamber and the madial wall of the housing Annular space is left, the heat exchanging chamber connects the medium outlet pipe by the annular space.
3. individual well hot dry rock electricity generation system according to claim 2, it is characterised in that:The first end plate and the liquid separation Inner barrel is connected between tube sheet, the first end plate, the inner barrel and the liquid separation tube sheet surround the liquid separation jointly Chamber, the external diameter of the inner barrel are less than the internal diameter of the housing.
4. individual well hot dry rock electricity generation system according to claim 3, it is characterised in that:The heat exchanger tube includes more parallel Copper pipe, leave gap between adjacent copper pipe.
5. individual well hot dry rock electricity generation system according to claim 4, it is characterised in that:The periphery of the liquid collecting tube sheet and institute The madial wall for stating housing is fixedly connected, and the liquid collecting tube sheet, the housing and second end plate surround the liquid collecting jointly Chamber.
6. individual well hot dry rock electricity generation system according to claim 5, it is characterised in that:The periphery of the liquid collecting tube sheet is set It is equipped with the through hole for connecting the heat exchanging chamber and the liquid collecting cavity.
7. individual well hot dry rock electricity generation system according to claim 6, it is characterised in that:The ground heat exchanger and the height Gas-liquid separator is provided between press pump.
8. individual well hot dry rock electricity generation system according to claim 7, it is characterised in that:The gas-liquid separator includes separation Device cavity, the side of the separator cavity are provided with inlet, and the bottom of the separator cavity is provided with liquid outlet, the separation The top of device cavity is provided with exhaust outlet, and the exhaust ports are corresponded in the separator cavity and are provided with ball-cock assembly;
Inclined downward in the separator cavity positioned at the inlet is provided with baffle plate, and taphole is offered on the baffle plate.
9. individual well hot dry rock electricity generation system according to claim 8, it is characterised in that:The baffle plate is from close to the feed liquor Side to the relative opposite side of mouth gradually rises.
CN201720300585.8U 2017-03-24 2017-03-24 Individual well hot dry rock electricity generation system Active CN206785571U (en)

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CN201720300585.8U CN206785571U (en) 2017-03-24 2017-03-24 Individual well hot dry rock electricity generation system

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Application Number Priority Date Filing Date Title
CN201720300585.8U CN206785571U (en) 2017-03-24 2017-03-24 Individual well hot dry rock electricity generation system

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111237146A (en) * 2020-01-14 2020-06-05 西南石油大学 Geothermal branch well constant temperature difference power generation system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111237146A (en) * 2020-01-14 2020-06-05 西南石油大学 Geothermal branch well constant temperature difference power generation system

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