CN211924390U - Comprehensive energy supply system for dry and hot rock - Google Patents
Comprehensive energy supply system for dry and hot rock Download PDFInfo
- Publication number
- CN211924390U CN211924390U CN201922068928.4U CN201922068928U CN211924390U CN 211924390 U CN211924390 U CN 211924390U CN 201922068928 U CN201922068928 U CN 201922068928U CN 211924390 U CN211924390 U CN 211924390U
- Authority
- CN
- China
- Prior art keywords
- valve
- bypass
- evaporator
- generator
- unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
Landscapes
- Sorption Type Refrigeration Machines (AREA)
Abstract
The utility model discloses a hot dry rock comprehensive energy supply system, which comprises a production well, a generator set, an absorption unit and an injection well which are connected in sequence, and also comprises a cooling tower and a heating and refrigerating pipeline; the extraction well and the injection well respectively extend to the hot dry rock from the earth surface; the cooling tower is respectively connected with the generator set and the absorption type unit and used for providing cooling water for the generator set and the absorption type unit; the heating and refrigerating pipeline is connected with the absorption unit in a switchable manner and used for obtaining heat in the absorption unit to realize heating or releasing heat to the absorption unit to realize refrigeration. The system can reasonably reduce the temperature of tail water on the premise of not increasing the mining cost, improve the heat utilization rate and provide multiple energy forms for ground users.
Description
Technical Field
The utility model belongs to geothermal resources comprehensive utilization field, more specifically relates to a dry and hot rock synthesizes energy supply system.
Background
The hot dry rock is rock mass which contains no or only a small amount of fluid and has the temperature higher than 180 ℃ and the heat energy of the rock mass can be utilized under the current technical and economic conditions. 3-10km of hot dry rock geothermal resources in the land area of China are about 856 trillion tons of standard coal, belong to abundant clean energy, realize economic, effective development and utilization, will slow down the pressure of supplying of oil gas energy in China.
Geothermal resources from hot dry rock are usually produced by circulating fluids through a well group consisting of injection and production wells, and for communication between well groups, natural fractures or artificial fracturing is usually required, so the investment in hot dry rock is usually high. In addition, the existing utilization modes abroad are all single power generation utilization, and the power generation installation is usually small due to the limited circulation flow of the hot dry rock system. Compared with the investment of hot dry rock heat storage and ground engineering, the economy of limited generated energy is difficult to realize. Meanwhile, the temperature of tail water is usually high due to the limit of power generation performance, and the tail water is injected underground under the condition of not being fully utilized, so that certain waste is caused. Because of the single usage pattern, the entire system has to be shut down when the ground power system fails or needs to be serviced, which will further reduce the number of hours of usage and slow down the recovery of investment.
In view of the above, it is desirable to develop a hot dry rock comprehensive energy supply system, which can utilize hot dry rock geothermal resources in a cascade manner, reasonably reduce the temperature of tail water under the condition of unchanged mining cost, improve the heat utilization rate, and provide multiple energy forms of cold, heat and electricity for ground users.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a hot dry rock synthesizes energy supply system is single, ground utilization guarantee rate and the low scheduling problem of heat utilization rate in order to solve the energy utilization form of hot dry rock electricity generation.
In order to achieve the purpose, the utility model provides a hot dry rock comprehensive energy supply system, which comprises a production well, a generator set, an absorption type unit and an injection well which are connected in sequence, and also comprises a cooling tower and a heating and refrigerating pipeline;
the production well and the injection well respectively extend from the earth surface to the hot dry rock;
the cooling tower is respectively connected with the generator set and the absorption type unit and used for providing cooling water for the generator set and the absorption type unit;
the heating and refrigerating pipeline is connected with the absorption type unit in a switchable manner and used for obtaining heat in the absorption type unit to realize heating or releasing heat to the absorption type unit to realize refrigeration.
Preferably, the generator set comprises a working medium evaporator, a generator, a working medium condenser and a working medium pump; the working medium pump, the circulating working medium side of the working medium evaporator, the generator and the circulating working medium side of the working medium condenser are sequentially connected to form a circulating loop of the circulating working medium.
Preferably, the absorption unit comprises a generator, an evaporator, an absorber and a condenser.
Preferably, the system further comprises a heat exchanger, and the production well, the circulating fluid side of the working medium evaporator, the generator of the absorption unit, the heat exchanger, the evaporator of the absorption unit and the injection well are sequentially connected.
Preferably, the heating and refrigerating pipeline comprises a first heating branch and a second heating branch;
the first heating branch comprises a circulating pump, a heating water supply valve, the absorber, the condenser and a heating water return valve in sequence;
the second heating branch comprises the circulating pump and the heat exchanger.
Preferably, the heating and refrigerating pipeline further comprises a refrigerating branch, and the refrigerating branch comprises the circulating pump, the refrigerating water supply valve, the evaporator and the refrigerating water return valve which are connected in sequence.
Preferably, a generator bypass, a heat exchanger bypass and an evaporator bypass are also included;
a ninth valve is arranged between the generator set and the generator, a tenth valve and a thirteenth valve are arranged between the generator and the heat exchanger, the generator bypass is arranged between the inlet end of the ninth valve and the outlet end of the tenth valve, an eleventh valve is arranged on the generator bypass, and the generator set can be connected to the heat exchanger through the generator bypass;
the heat exchanger bypass is arranged between the outlet end of the thirteenth valve and the outlet end of the heat exchanger, and a fourteenth valve is arranged on the heat exchanger bypass;
a twelfth valve is arranged between the heat exchanger and the evaporator, the evaporator bypass is arranged between the inlet end of the twelfth valve and the outlet end of the evaporator, a fifteenth valve is arranged on the evaporator bypass, and the heat exchanger can be connected to the injection well through the evaporator bypass.
Preferably, the system further comprises a generator set bypass and an absorption generator set bypass;
a first valve is arranged between the production well and the generator set, a generator set bypass is arranged between the inlet end of the first valve and the inlet end of the ninth valve, a second valve is arranged on the generator set bypass, and the production well can be connected to the absorption type generator set through the generator set bypass;
the absorption unit bypass includes the generator bypass, the thirteenth valve, the heat exchanger bypass, and the evaporator bypass, and the generator unit is capable of flowing into the injection well sequentially through the generator bypass, the thirteenth valve, the heat exchanger bypass, and the evaporator bypass.
Preferably, the cooling water supply device further comprises a cooling water pump, a cooling water supply valve and a cooling water return valve;
the cooling water pump, the working medium condenser and the cooling tower are sequentially connected to form a first cooling loop;
the cooling water pump, the cooling water supply valve, the absorber, the condenser, the cooling water return valve and the cooling tower are sequentially connected to form a second cooling loop.
Preferably, the system further comprises a cyclone sand remover and a filter, wherein the cyclone sand remover is arranged between the production well and the evaporator, and the filter is arranged between the absorption unit and the injection well.
The beneficial effects of the utility model reside in that:
1. make up the not enough of traditional hot dry rock power generation system, carry out comprehensive cascade utilization with hot dry rock geothermol power resource, rationally reduce tail water temperature under the unchangeable condition of exploitation cost, improve the heat utilization ratio.
2. The heating and refrigerating pipeline is used for providing three different energy forms of cold, heat and electricity for ground users, so that the utilization rate of ground heat is improved, and the economy is further improved.
3. The absorption type unit is used for heating and refrigerating, the power consumption is far lower than that of a voltage compression type heat pump technology, the operation cost is further reduced, and the energy-saving and emission-reducing effects are improved.
4. The problems that the existing hot dry rock geothermal resource development investment cost is high, the economy is low, the energy utilization form of hot dry rock power generation is single, the ground utilization guarantee rate and the heat utilization rate are low and the like are solved.
Other features and advantages of the present invention will be described in detail in the detailed description which follows.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent by describing in more detail exemplary embodiments thereof with reference to the attached drawings, in which like reference numerals generally represent like parts throughout the exemplary embodiments of the present invention.
Fig. 1 shows a schematic diagram of a hot dry rock integrated energy supply system according to an embodiment of the present invention.
Description of the reference numerals
1. A production well; 2. a submersible pump; 3. a cyclone desander; 4. a working medium evaporator; 5. a generator set; 6. a working medium condenser; 7. a working medium pump; 8. a cooling tower; 9. a cooling water pump; 10. an absorption unit; 10-1, a generator; 10-2, an evaporator; 10-3, an absorber; 10-4, a condenser; 11. a heat exchanger; 12. a circulation pump; 13. a heating and refrigerating pipeline; 14. a filter; 15. reinjection of the pressure pump; 16. an injection well; v1, first valve; v2, second valve; v3, cooling water supply valve; v4, cooling water return valve; v5, heating water supply valve; v6, a heating water return valve; v7, refrigeration water supply valve; v8, a refrigeration water return valve; v9, ninth valve; v10, tenth valve; v11, eleventh valve; v12, twelfth valve; v13, thirteenth valve; v14, fourteenth valve; v15, fifteenth valve.
Detailed Description
Preferred embodiments of the present invention will be described in more detail below. While the following describes preferred embodiments of the present invention, it should be understood that the present invention may be embodied in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
The comprehensive energy supply system for the hot dry rock comprises a production well, a generator set, an absorption unit and an injection well which are connected in sequence, and also comprises a cooling tower and a heating and refrigerating pipeline;
the extraction well and the injection well respectively extend to the hot dry rock from the earth surface;
the cooling tower is respectively connected with the generator set and the absorption type unit and used for providing cooling water for the generator set and the absorption type unit;
the heating and refrigerating pipeline is connected with the absorption unit in a switchable manner and used for obtaining heat in the absorption unit to realize heating or releasing heat to the absorption unit to realize refrigeration.
Specifically, the number and proportion of extraction wells and injection wells in a well group of the dry hot rock comprehensive energy supply system are determined according to geological conditions such as ground comprehensive energy supply load, a dry hot rock heat storage seam network and the like; the well distance between the extraction well and the injection well is determined according to the safe distance without thermal breakthrough under the temperature of tail water of the ground system;
the heat energy in the dry hot rock is extracted by a recovery well through circulating fluid, sequentially flows through a generator set and an absorption unit, is subjected to heat exchange stage by stage and then is fed back into an injection well, wherein the circulating fluid can adopt water or carbon dioxide;
the connection modes of all the unit equipment are pipeline connection, and a bypass and a valve are arranged on a pipeline at a necessary position; each unit can be assembled and produced according to a skid-mounted unit mode, so that the occupied space of the system is further saved;
according to the scheme, on one hand, the defects of a traditional hot dry rock power generation system can be overcome, hot dry rock geothermal resources are comprehensively utilized in a gradient manner, the temperature of tail water is reasonably reduced under the condition that the mining cost is not changed, and the heat utilization rate is improved; on the other hand, different energy forms of cold, heat and electricity are provided for ground users, and the economy is further improved while the ground utilization guarantee rate is improved.
As the preferred scheme, the generating set comprises a working medium evaporator, a generator, a working medium condenser and a working medium pump; the working medium pump, the circulating working medium side of the working medium evaporator, the generator and the circulating working medium side of the working medium condenser are sequentially connected to form a circulating loop of the circulating working medium.
Specifically, a circulating working medium is heated and gasified in a working medium evaporator, then enters a generator to do work for power generation, then enters a working medium condenser to be cooled and liquefied, and then is pumped back to the circulating working medium side of the working medium evaporator by a working medium pump to complete the thermal power generation cycle;
the generator can adopt applicable unit types such as a turbine generator set, a screw generator set and the like;
the circulating working medium adopts a low boiling point working medium, and comprises a single organic working medium, a multi-element organic working medium, carbon dioxide and the like.
Preferably, the absorption unit comprises a generator, an evaporator, an absorber and a condenser.
Specifically, a mixed liquid is positioned in the generator, and the mixed liquid comprises a lithiated aqueous solution and a refrigerant; circulating fluid flows through the generator and the evaporator in sequence, and cooling water flows through the absorber and the condenser in sequence; after the mixed liquid in the generator is heated by the circulating fluid, the refrigerant in the mixed liquid is vaporized to form refrigerant steam which is separated from the lithiated aqueous solution; the lithiated aqueous solution enters an absorber from a generator; refrigerant steam enters a condenser from a generator, is cooled and liquefied into refrigerant in the condenser by cooling water, enters an evaporator, is heated and vaporized into refrigerant steam by circulating fluid in the evaporator and enters an absorber; the refrigerant steam is cooled by cooling water in the absorber and then mixed with the lithiated compound aqueous solution to form mixed solution, and the mixed solution flows back to the generator;
the lithiated water solution is one or more of LiBr-water, LiCl-water and LiI-water.
The absorption type unit is used for heating and refrigerating, the power consumption is far lower than that of a voltage compression type heat pump technology, the operation cost is further reduced, and the energy-saving and emission-reducing effects are improved.
Preferably, the system also comprises a heat exchanger, and the extraction well, the circulating fluid side of the working medium evaporator, the generator of the absorption unit, the heat exchanger, the evaporator of the absorption unit and the injection well are sequentially connected.
Specifically, as a large middle temperature section between the heat source driving temperature of the generator and the evaporation temperature required by the evaporator cannot be directly utilized, the circulating fluid is firstly sent to the heat exchanger for further heat exchange after being subjected to heat release in the generator and then enters the evaporator;
the type of heat exchanger can be selected according to the needs, and a plate heat exchanger is preferred.
As a preferred scheme, the heating and refrigerating pipeline comprises a first heating branch and a second heating branch;
the first heating branch comprises a circulating pump, a heating water supply valve, an absorber, a condenser and a heating water return valve in sequence;
the second heating branch comprises a circulating pump and a heat exchanger.
Specifically, the heat medium water in the user pipeline flows through the absorber and the condenser in sequence under the action of the circulating pump through the first heating branch, and flows back to the user pipeline after absorbing the heat released in the liquefaction process of the refrigerant steam, so that heating is realized;
and the heat medium water in the user pipeline flows through the heat exchanger through the second heating branch under the action of the circulating pump, and flows back to the user pipeline after absorbing the heat of the circulating fluid, so that heating is realized.
As the preferred scheme, the heating and refrigerating pipeline also comprises a refrigerating branch, and the refrigerating branch comprises a circulating pump, a refrigerating water supply valve, an evaporator and a refrigerating water return valve which are sequentially connected.
Specifically, refrigerant water in the user pipeline flows through the evaporator through the refrigeration branch under the action of the circulating pump, and a refrigerant in the evaporator evaporates to absorb heat, so that the refrigerant water flows back to the user pipeline after the temperature of the refrigerant water is reduced, and refrigeration is realized.
Furthermore, the heating and refrigeration can share the same heating and refrigeration pipeline and the same circulating pump as described above, and multiple groups of heating and refrigeration pipelines and circulating pumps can be arranged, so that each heating loop and each refrigeration loop respectively use one group of heating and refrigeration pipeline and one group of circulating pump, and the heating and refrigeration can simultaneously obtain two energy forms of cold and heat.
Preferably, the system also comprises a generator bypass, a heat exchanger bypass and an evaporator bypass;
a ninth valve is arranged between the generator set and the generator, a tenth valve and a thirteenth valve are arranged between the generator and the heat exchanger, a generator bypass is arranged between the inlet end of the ninth valve and the outlet end of the tenth valve, an eleventh valve is arranged on the generator bypass, and the generator set can be connected to the heat exchanger through the generator bypass;
the heat exchanger bypass is arranged between the outlet end of the thirteenth valve and the outlet end of the heat exchanger, and a fourteenth valve is arranged on the heat exchanger bypass;
be equipped with the twelfth valve between heat exchanger and the evaporimeter, the evaporimeter bypass is located between the entry end of twelfth valve and the exit end of evaporimeter, is equipped with the fifteenth valve on the evaporimeter bypass, and the heat exchanger can be connected in the injection well through the evaporimeter bypass.
As the preferred scheme, the system also comprises a generator set bypass and an absorption type generator set bypass;
a first valve is arranged between the production well and the generator set, a generator set bypass is arranged between the inlet end of the first valve and the inlet end of the ninth valve, a second valve is arranged on the generator set bypass, and the production well can be connected to the absorption type generator set through the generator set bypass;
the absorption unit bypass comprises a generator bypass, a thirteenth valve, a heat exchanger bypass, and an evaporator bypass, and the generator unit is capable of flowing sequentially through the generator bypass, the thirteenth valve, the heat exchanger bypass, and the evaporator bypass into the injection well.
Specifically, the bypass and the valve are arranged, and when a certain type of equipment needs temporary shutdown for maintenance or fails, the equipment can be switched to other energy supply modes, so that the shutdown of the whole system is avoided.
As the preferred scheme, the cooling water supply device also comprises a cooling water pump, a cooling water supply valve and a cooling water return valve;
the cooling water pump, the working medium condenser and the cooling tower are sequentially connected to form a first cooling loop;
and the cooling water pump, the cooling water supply valve, the absorber, the condenser, the cooling water return valve and the cooling tower are sequentially connected to form a second cooling loop.
Specifically, an open water cooling system can be adopted to replace a cooling tower in the area where the surface water source is sufficient and allowed to be utilized, and an air cooling system can be adopted to replace the cooling tower in the area with water shortage or drought.
Preferably, the system further comprises a cyclone sand remover and a filter, wherein the cyclone sand remover is arranged between the production well and the evaporator, and the filter is arranged between the absorption unit and the injection well.
In particular, the circulating fluid is produced from a production well by a submersible pump and is reinjected into an injection well by a reinjection pressurization pump
Examples
Fig. 1 shows a schematic diagram of a hot dry rock integrated energy supply system according to the present embodiment.
As shown in FIG. 1, the comprehensive energy supply system for hot dry rock comprises:
the extraction well 1 and the injection well 16 respectively extend from the earth surface to the hot dry rock, the heat energy in the hot dry rock is extracted by circulating fluid through the extraction well 1, passes through the cyclone desander 3, sequentially flows through the power supply unit 5 and the absorption unit 10, is subjected to heat exchange step by step, is filtered by the filter 14, and is refilled into the injection well 16 by the refilling booster pump 15;
the generator set 5 comprises a working medium evaporator 4, a generator, a working medium condenser 6 and a working medium pump 7; the working medium pump 7, the circulating working medium side of the working medium evaporator 4, the generator and the circulating working medium side of the working medium condenser 6 are sequentially connected to form a circulating loop of the circulating working medium;
the absorption type unit 10 comprises a generator 10-1, a heat exchanger 11, an evaporator 10-2, an absorber 10-3 and a condenser 10-4, wherein a production well 1, a circulating fluid side of a working medium evaporator 4, the generator 10-1, the heat exchanger 11, the evaporator 10-2 and an injection well are sequentially connected;
the water supply end of the cooling tower 8 is sequentially connected with the working medium condenser 6 and the water return end of the cooling tower 8 through a cooling water pump 9 to form a first cooling loop; the water supply end of the cooling tower 8 is sequentially connected with a cooling water supply valve V3, an absorber 10-3, a condenser 10-4, a cooling water return valve V4 and the water return end of the cooling tower 8 through a cooling water pump 9 to form a second cooling loop;
the heating and refrigerating pipeline comprises a first heating branch, a second heating branch and a refrigerating branch, wherein the first heating branch sequentially comprises a circulating pump 12, a heating water supply valve V5, an absorber 10-3, a condenser 10-4 and a heating water return valve V6; the second heating branch comprises a circulating pump 12 and a heat exchanger 11; the refrigeration branch comprises a circulating pump 12, a refrigeration water supply valve V7, an evaporator 10-2 and a refrigeration water return valve V8 which are connected in sequence.
A ninth valve V9 is arranged between the generator set 5 and the generator 10-1, a tenth valve V10 and a thirteenth valve V13 are arranged between the generator 10-1 and the heat exchanger 11, a generator bypass is arranged between the inlet end of the ninth valve V9 and the outlet end of the tenth valve V10, an eleventh valve V11 is arranged on the generator bypass, and the generator set 5 can be connected to the heat exchanger 11 through the generator 10-1 bypass;
the heat exchanger bypass is arranged between the outlet end of the thirteenth valve V13 and the outlet end of the heat exchanger, the fourteenth valve V14 is arranged on the heat exchanger bypass, and the generator 10-1 can be connected to the evaporator 10-2 through the heat exchanger bypass;
a twelfth valve V12 is arranged between the heat exchanger 11 and the evaporator 10-2, an evaporator bypass is arranged between the inlet end of the twelfth valve V12 and the outlet end of the evaporator, a fifteenth valve V15 is arranged on the evaporator bypass, and the heat exchanger 11 can be connected to an injection well through the evaporator 10-2 bypass;
a first valve V1 is arranged between the production well 1 and the generator set 5, a second valve V2 is arranged on a generator set bypass, and the production well 1 can be connected to the absorption type generator set 10 through the generator set bypass;
the absorption unit bypass comprises a generator bypass, a thirteenth valve V13, a heat exchanger bypass and an evaporator bypass, the generator set 5 being able to flow to the injection well in this order via the generator bypass, the thirteenth valve V13, the heat exchanger bypass and the evaporator bypass.
1) And in the power generation mode, the first valve V1 is opened, the second valve V2 is closed, the heat energy in the dry hot rock is pumped to the ground through the circulating hot fluid by the submersible pump 2 in the extraction well 1, sand is removed through the cyclone sand remover 3, the sand is sent into the working medium evaporator 4 after passing through the first valve V1, the circulating fluid in the working medium evaporator 4 transfers the heat to the low-boiling-point circulating working medium, and the cooled circulating fluid enters the absorption type unit 10 through the ninth valve V9 for further heat exchange. The heated and gasified circulating working medium in the working medium evaporator 4 enters the generator 5 to do work for power generation, then the exhaust gas enters the working medium condenser 6 to be cooled and liquefied into liquid working medium by cooling water, and the liquid working medium is sent into the working medium evaporator 4 again by the working medium pump 7 to complete the cycle of thermal power generation. And a part of the cooling water tower 8 is sent to the exhaust of the working medium condenser 6 for cooling the generator 5 by the cooling water pump 9 and is sent into the cooling water tower 8 again for cooling, so that cooling water circulation is completed.
2) In the combined heat and power mode, valves V5, V6, V9, V10, V12 and V13 are opened, valves V3, V4, V7, V8, V11, V14 and V15 are closed, and the circulating fluid subjected to preliminary temperature reduction in the working medium evaporator 4 firstly enters the generator 10-1 of the absorption unit 10 through a ninth valve V9.
The fluid circulating in the generator 10-1 further releases heat, heats the mixed liquid in the absorption unit 10 to boil the refrigerant in the mixed liquid and generate refrigerant vapor, and the refrigerant vapor pressure is increased through the pressure increase of the solution pump in the absorption unit and the heating of the heat source. The concentration and temperature of the lithiated compound aqueous solution of the mixed liquid are increased after the refrigerant vapor is released, and the mixed liquid is returned to the absorber 10-3 after throttling and pressure reduction and has the capacity of absorbing the refrigerant vapor again. High-pressure refrigerant steam generated in the generator 10-1 is sent to a condenser 10-4 to be condensed into refrigerant liquid, is sent to an evaporator 10-2 with lower pressure after being throttled, is heated and evaporated by circulating fluid entering the unit for the second time, generates low-pressure refrigerant steam, is sent to an absorber 10-3 and is absorbed by high-concentration lithiated aqueous solution in the absorber, and therefore circulation in the absorption type unit 10 is completed.
As a large middle temperature section between the heat source driving temperature of the generator 10-1 and the evaporation temperature required by the evaporator 10-2 can not be directly utilized, the circulating fluid releases heat in the generator (10-1), enters the heat exchanger (11) through the tenth valve V10 and the thirteenth valve V13 in sequence, is sent back to the evaporator 10-2 to further release heat, is filtered by the filter 14, and is injected back into the injection well 16 by the injection pressure pump 15 to complete the ground comprehensive utilization cycle.
On one hand, after passing through a circulating pump 12 and a heating water supply valve V5, the heat medium water in the user pipeline sequentially flows through an absorber 10-3 and a condenser 10-4, absorbs heat released in the liquefaction process of the refrigerant steam, and then returns to the user pipeline through a heating water return valve V6, and heating is achieved. Because the temperature of cooling water required by the absorber 10-3 is lower than that of cooling water required by the condenser 10-4, hot medium water return water as the cooling water sequentially flows through the absorber 10-3 and the condenser 10-4 in a series connection mode, the temperature is gradually increased to reach the temperature required by heating, on the other hand, the hot medium water in a user pipeline enters the heat exchanger 11 through the circulating pump 12, and after the heat of circulating fluid is absorbed, the hot medium water flows back to the user pipeline, and heating is achieved.
3) In the combined cooling and power mode, valves V3, V4, V7, V8, V9, V10, V13, V14 and V15 are opened, valves V5, V6, V11 and V12 are closed, the circulating fluid which is subjected to preliminary temperature reduction in the working medium evaporator 4 also enters the generator 10-1 of the absorption unit 10, the mixed liquid is heated to boil the refrigerant in the mixed liquid and generate refrigerant steam, the refrigerant steam is sent to the condenser 10-4 to be condensed into liquid, throttling pressure is reduced to evaporation pressure, the refrigerant steam is evaporated into the refrigerant steam in the evaporator 10-2, the refrigerant steam coming out of the evaporator 10-2 is absorbed by the lithium compound aqueous solution in the absorber 10-3 and sent to the generator 10-1 again, and therefore cycle use is completed.
The cooling water required in the absorber 10-3 and the condenser 10-4 is provided by a cooling water tower 8 and a cooling water pump 9 through a circulating cooling water branch controlled by valves V3 and V4. Refrigerant water in the user pipeline flows through the evaporator 10-2 through the refrigeration branch under the action of the circulating pump 12, and a refrigerant in the evaporator 10-2 is vaporized to absorb heat, so that the refrigerant water flows back to the user pipeline after the temperature of the refrigerant water is reduced, and refrigeration is realized.
When the power supply unit fails or needs temporary maintenance, the bypass valve V2 can be opened, the valve V1 is closed, and the circulating fluid directly enters the absorption type unit 10 to supply heat or refrigerate.
When the absorption type unit 10 is in fault or needs temporary maintenance, the bypass valves V11, V13 and V15 can be opened, and the valves V9, V10, V12 and V14 are closed, so that the system is switched to the single heating mode of the plate heat exchanger 11 to keep low-load operation, and the stop of the whole heating system is avoided; or the bypass valves V11, V13, V14 and V15 can be opened, the valves V9, V10 and V12 are closed, and the system only keeps the power generation mode.
While various embodiments of the present invention have been described above, the above description is intended to be illustrative, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.
Claims (10)
1. The comprehensive energy supply system for the hot dry rock is characterized by comprising an extraction well, a power supply unit, an absorption unit, an injection well, a cooling tower and a heating and refrigerating pipeline, wherein the extraction well, the power supply unit, the absorption unit and the injection well are sequentially connected;
the production well and the injection well respectively extend from the earth surface to the hot dry rock;
the cooling tower is respectively connected with the power supply unit and the absorption type unit and used for providing cooling water for the power supply unit and the absorption type unit;
the heating and refrigerating pipeline is connected with the absorption type unit in a switchable manner and used for obtaining heat in the absorption type unit to realize heating or releasing heat to the absorption type unit to realize refrigeration.
2. The hot dry rock comprehensive energy supply system according to claim 1, wherein the power supply unit comprises a working medium evaporator, a power generating unit, a working medium condenser and a working medium pump; the working medium pump, the circulating working medium side of the working medium evaporator, the generator set and the circulating working medium side of the working medium condenser are sequentially connected to form a circulating loop of the circulating working medium.
3. The hot dry rock integrated energy supply system of claim 2, wherein the absorption unit comprises a generator, an evaporator, an absorber, and a condenser.
4. The hot dry rock comprehensive energy supply system according to claim 3, further comprising a heat exchanger, wherein the production well, the circulating fluid side of the working medium evaporator, the generator of the absorption unit, the heat exchanger, the evaporator of the absorption unit and the injection well are connected in sequence.
5. The hot dry rock integrated energy supply system according to claim 4, wherein the heating and refrigerating pipeline comprises a first heating branch and a second heating branch;
the first heating branch comprises a circulating pump, a heating water return valve (V5), the absorber, the condenser and a heating water supply valve (V6) in sequence;
the second heating branch comprises the circulating pump and the heat exchanger.
6. The hot dry rock comprehensive energy supply system according to claim 5, wherein the heating and refrigerating pipeline further comprises a refrigerating branch, and the refrigerating branch comprises the circulating pump, a refrigerating water return valve (V7), the evaporator and a refrigerating water supply valve (V8) which are connected in sequence.
7. The hot dry rock integrated energy supply system according to claim 4, further comprising a generator bypass, a heat exchanger bypass, and an evaporator bypass;
a ninth valve (V9) is arranged between the power supply unit and the generator, a tenth valve (V10) and a thirteenth valve (V13) are arranged between the generator and the heat exchanger, the generator bypass is arranged between the inlet end of the ninth valve (V9) and the outlet end of the tenth valve (V10), an eleventh valve (V11) is arranged on the generator bypass, and the power supply unit can be connected to the heat exchanger through the generator bypass;
the heat exchanger bypass is arranged between the outlet end of the thirteenth valve (V13) and the outlet end of the heat exchanger, a fourteenth valve (V14) is arranged on the heat exchanger bypass, and the generator can be connected to the evaporator through the heat exchanger bypass;
a twelfth valve (V12) is arranged between the heat exchanger and the evaporator, the evaporator bypass is arranged between the inlet end of the twelfth valve (V12) and the outlet end of the evaporator, a fifteenth valve (V15) is arranged on the evaporator bypass, and the heat exchanger can be connected to the injection well through the evaporator bypass.
8. The hot dry rock integrated energy supply system according to claim 7, further comprising a power unit bypass, an absorption unit bypass;
a first valve (V1) is arranged between the production well and the power supply unit, the power supply unit bypass is arranged between the inlet end of the first valve and the inlet end of the ninth valve (V9), a second valve (V2) is arranged on the power supply unit bypass, and the production well can be connected to the absorption unit through the power supply unit bypass;
the absorption unit bypass comprises the generator bypass, the thirteenth valve (V13), the heat exchanger bypass and the evaporator bypass, and the power supply unit is capable of flowing into the injection well sequentially through the generator bypass, the thirteenth valve (V13), the heat exchanger bypass and the evaporator bypass.
9. The hot dry rock integrated power supply system according to claim 3, further comprising a cooling water pump, a cooling water supply valve (V3) and a cooling water return valve (V4);
the cooling water pump, the working medium condenser and the cooling tower are sequentially connected to form a first cooling loop;
the cooling water pump, the cooling water supply valve (V3), the absorber, the condenser, the cooling water return valve (V4) and the cooling tower are sequentially connected to form a second cooling loop.
10. The hot dry rock integrated energy supply system according to claim 2, further comprising a cyclone sand remover and a filter, wherein the cyclone sand remover is arranged between the production well and the evaporator, and the filter is arranged between the absorption unit and the injection well.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922068928.4U CN211924390U (en) | 2019-11-25 | 2019-11-25 | Comprehensive energy supply system for dry and hot rock |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922068928.4U CN211924390U (en) | 2019-11-25 | 2019-11-25 | Comprehensive energy supply system for dry and hot rock |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211924390U true CN211924390U (en) | 2020-11-13 |
Family
ID=73319071
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922068928.4U Active CN211924390U (en) | 2019-11-25 | 2019-11-25 | Comprehensive energy supply system for dry and hot rock |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211924390U (en) |
-
2019
- 2019-11-25 CN CN201922068928.4U patent/CN211924390U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102562496B (en) | Middle/low-temperature geothermic efficient thermoelectric coupling combined supply system based on organic Rankine cycle (ORC) | |
| CN110345549B (en) | Liquid cooling data center waste heat recovery system | |
| CN105888992B (en) | A kind of solar energy and ground heat integration double flash evaporation double-work medium circulating generation hot-water heating system | |
| CN102287344A (en) | Novel geothermal and optothermal cogeneration system | |
| CN107939548A (en) | Internal combustion engine UTILIZATION OF VESIDUAL HEAT IN cooling heating and power generation system and its method of work | |
| CN112503782A (en) | Oil field waste heat recovery system and method applying solar energy and lithium bromide heat pump | |
| CN103868278A (en) | Low-grade energy driving CO2 absorption type combined cooling heating and power system | |
| CN109306879A (en) | A kind of compressed-air energy-storage system | |
| CN106917728A (en) | Using geothermal energy and the clean electric power generation change system and method for solar energy | |
| CN106076073A (en) | A kind of solar energy and the energy utility system of geothermal energy united power plant low-carbon emission | |
| CN202220630U (en) | Low-temperature waste heat recovery plant used in petrochemical industry | |
| CN103090582B (en) | The absorption energy storage equipment of a kind of boosting type three-phase | |
| CN203518324U (en) | Waste heat recovering system | |
| CN205117427U (en) | Electricity generation of natural atmospheric pressure difference combines electricity generation of organic rankine cycle to retrieve cold volume system | |
| CN204691833U (en) | A kind of circulating water afterheat utilized device | |
| CN204693371U (en) | One directly reclaims turbine discharge waste heat and heat-setting water system | |
| CN114046172A (en) | Coal fire treatment and utilization system and method based on carbon dioxide process and modular design | |
| CN102620478A (en) | Method and device for improving thermal circulation efficiency | |
| CN203190713U (en) | Pressurization type three-phase absorption energy storage device | |
| CN203499934U (en) | Thermal circulating system for small temperature difference power generation | |
| CN211924390U (en) | Comprehensive energy supply system for dry and hot rock | |
| CN205556107U (en) | Cascade utilization system of supplementary carbon dioxide entrapment of low temperature geothermal energy in utilization | |
| CN209084870U (en) | A kind of mid-deep strata geothermal energy absorption compression integration central heating system | |
| CN207585140U (en) | One kind is based on the second kind absorption type mixing heat pump | |
| CN206360740U (en) | Afterheat generating system and power station |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |