CN105673103A - Geothermal wellhead power station system based on ORC systems and power generation method of geothermal wellhead power station system - Google Patents
Geothermal wellhead power station system based on ORC systems and power generation method of geothermal wellhead power station system Download PDFInfo
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- CN105673103A CN105673103A CN201610202392.9A CN201610202392A CN105673103A CN 105673103 A CN105673103 A CN 105673103A CN 201610202392 A CN201610202392 A CN 201610202392A CN 105673103 A CN105673103 A CN 105673103A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K23/00—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids
- F01K23/02—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled
- F01K23/04—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled condensation heat from one cycle heating the fluid in another cycle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K27/00—Plants for converting heat or fluid energy into mechanical energy, not otherwise provided for
- F01K27/02—Plants modified to use their waste heat, other than that of exhaust, e.g. engine-friction heat
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The invention discloses a geothermal wellhead power station system based on ORC systems and a power generation method of the geothermal wellhead power station system. The geothermal wellhead power station system comprises a second gas-liquid separator, a flash tank, a third screw expander, a fourth screw expander, a third power generator, a fourth power generator, the first ORC system and the second ORC system. The first end of the second gas-liquid separator is connected with the third screw expander. Saturated steam enters the third screw expander. An exhaust opening of the third screw expander is connected with the first ORC system and an exhaust opening of the fourth screw expander. The second end of the second gas-liquid separator is connected with the flash tank. The flash tank is connected with the fourth screw expander. High-temperature and high-pressure brine enters the flash tank. The fourth screw expander is further connected with the first ORC system. The flash tank is connected with the second ORC system. The high-temperature brine obtained after flash evaporation enters the second ORC system. By means of the geothermal wellhead power station system based on the ORC systems and the power generation method of the geothermal wellhead power station system, the geothermal utilization efficiency can be improved.
Description
Technical field
The invention belongs to geothermal power generation technical field, relate to a kind of underground heat well head electric power station system, particularly relate to a kind of underground heat well head electric power station system based on ORC system.
Background technology
Geothermal power station is the electric station utilizing geothermal water, high heat rock mass or steam to make primary energy. Existing geothermal power station is low to the utilization rate of the energy. Existing geothermal power station needs to use the geothermal well hot-water collection of different regions together, and long distance delivery makes heat incur loss, and this Land use systems is single, it is impossible to classification makes full use of heat energy.
In view of this, nowadays in the urgent need to designing a kind of new underground heat well head electric power station system, in order to overcome the drawbacks described above that existing underground heat well head electric power station system exists.
Summary of the invention
The technical problem to be solved is: provides a kind of underground heat well head electric power station system based on ORC system, can improve the utilization ratio to underground heat.
Additionally, the present invention also provides for the electricity-generating method of above-mentioned underground heat well head electric power station system, the utilization ratio to underground heat can be improved.
For solving above-mentioned technical problem, the present invention adopts the following technical scheme that
A kind of underground heat well head electric power station system based on ORC system, described underground heat well head electric power station system includes: the second gas-liquid separator, flash distillation filling, the 3rd screw expander, the 4th screw expander, the 3rd electromotor, the 4th electromotor, the first ORC system, the second ORC system; Described 3rd electromotor, the 4th electromotor are same a pair of shaft electromotor;
First end of described second gas-liquid separator connects the 3rd screw expander, and saturated vapor enters the 3rd screw expander; 3rd screw expander connects the 3rd electromotor, and the 3rd screw expander air vent connects the first ORC system and the air vent of the 4th screw expander;
Second end of described second gas-liquid separator connects flash tank, flash tank connects the 4th screw expander, High Temperature High Pressure salt enters flash tank, the steam flashed off enters the 4th screw expander, 4th screw expander outlet vapor and the mixing of the 3rd screw expander outlet vapor, mixed steam enters the first ORC system;4th screw expander connects the 4th electromotor, and the 4th screw expander is also connected with the first ORC system; Described flash tank connects the second ORC system; The outlet of described flash tank is also connected with one the 3rd gas-liquid separator;
Described first ORC system includes the first vaporizer, the first preheater, the first working medium conveying mechanism, the first condenser, the first screw expander, the first electromotor, the first gas-liquid separator; 3rd screw expander, the 4th screw expander connect the first vaporizer respectively; First vaporizer, the first preheater, the first working medium conveying mechanism, the first condenser, the first screw expander are sequentially connected with, and the first screw expander connects the first electromotor, the first vaporizer respectively; First preheater connects the first gas-liquid separator, the incoagulable gas emptying that the first gas-liquid separator separates goes out, and the liquid separated is delivered to inverted well by the first conveying mechanism, refills underground;
Described second ORC system includes the second vaporizer, the second preheater, the second working medium conveying mechanism, the second condenser, the second screw expander, the second electromotor; Described flash tank connects the second vaporizer; Second vaporizer, the second preheater, the second working medium conveying mechanism, the second condenser, the second screw expander are sequentially connected with, and the second screw expander connects the second electromotor, the second vaporizer respectively; The outlet salt of the second preheater is delivered to inverted well by second conveyor structure, refills underground;
Described first condenser, the second condenser are air cooled condenser, water cooled condenser or evaporative condenser.
A kind of underground heat well head electric power station system based on ORC system, described underground heat well head electric power station system includes: the second gas-liquid separator, flash distillation filling, the 3rd screw expander, the 4th screw expander, the 3rd electromotor, the 4th electromotor, the first ORC system, the second ORC system;
First end of described second gas-liquid separator connects the 3rd screw expander, and saturated vapor enters the 3rd screw expander; 3rd screw expander connects the 3rd electromotor, and the 3rd screw expander air vent connects the first ORC system and the air vent of the 4th screw expander;
Second end of described second gas-liquid separator connects flash tank, flash tank connects the 4th screw expander, High Temperature High Pressure salt enters flash tank, the steam flashed off enters the 4th screw expander, 4th screw expander outlet vapor and the mixing of the 3rd screw expander outlet vapor, mixed steam enters the first ORC system; 4th screw expander connects the 4th electromotor, and the 4th screw expander is also connected with the first ORC system; Described flash tank connects the second ORC system.
As a preferred embodiment of the present invention, described first ORC system includes the first vaporizer, the first preheater, the first working medium conveying mechanism, the first condenser, the first screw expander, the first electromotor, the first gas-liquid separator; 3rd screw expander, the 4th screw expander connect the first vaporizer respectively; First vaporizer, the first preheater, the first working medium conveying mechanism, the first condenser, the first screw expander are sequentially connected with, and the first screw expander connects the first electromotor, the first vaporizer respectively; First preheater connects the first gas-liquid separator, the incoagulable gas emptying that the first gas-liquid separator separates goes out, and the liquid separated is delivered to inverted well by the first conveying mechanism, refills underground;
As a preferred embodiment of the present invention, described second ORC system includes the second vaporizer, the second preheater, the second working medium conveying mechanism, the second condenser, the second screw expander, the second electromotor;Described flash tank connects the second vaporizer; Second vaporizer, the second preheater, the second working medium conveying mechanism, the second condenser, the second screw expander are sequentially connected with, and the second screw expander connects the second electromotor, the second vaporizer respectively; The outlet salt of the second preheater is delivered to inverted well by second conveyor structure, refills underground.
As a preferred embodiment of the present invention, described 3rd electromotor, the 4th electromotor are same a pair of shaft electromotor.
As a preferred embodiment of the present invention, the outlet of described flash tank connects one the 3rd gas-liquid separator.
As a preferred embodiment of the present invention, described first ORC system, the second ORC system condenser be air cooled condenser, water cooled condenser or evaporative condenser.
The electricity-generating method of a kind of above-mentioned underground heat well head electric power station system, described electricity-generating method comprises the steps:
Step S1, the steam water interface exported by geothermal well are introduced into the second gas-liquid separator in advance, and after first separation, saturated vapor enters the 3rd screw expander, and High Temperature High Pressure salt enters flash tank;
Step S2, the steam flashed off enter the 4th screw expander;
Step S3, the 4th screw expander outlet vapor and the mixing of the 3rd screw expander outlet vapor, mixed steam enters the first ORC system; First ORC system configuration gas-liquid separator, empties incoagulable gas therein, and the liquid separated is delivered to inverted well by the first conveying mechanism, refills underground;
Step S4, being entered the second ORC system by flash tank high-temperature bittern out, the preheater outlet salt of the second ORC system is delivered to inverted well by second conveyor structure, refills underground.
The beneficial effects of the present invention is: the underground heat well head electric power station system based on ORC system of present invention proposition and electricity-generating method thereof, the utilization ratio to underground heat can be improved. The present invention can for solely hot well allocation plan, and system is easy, it is simple to install. This system can realize energy classified utilization, and the pressure first with underground heat well head can generate electricity, and next utilizes underground heat heat energy to carry out secondary electricity generation, and utilization efficiency of heat energy is high. Additionally this system is the environment friendly system of 100%, it is possible to achieve 100% geothermal water reinjection. The present invention is directed to the Land use systems of solely hot well, be the heat utilization mode efficiently at a kind of well one station.
Accompanying drawing explanation
Fig. 1 is the composition schematic diagram of underground heat well head electric power station system of the present invention.
Detailed description of the invention
The preferred embodiments of the present invention are described in detail below in conjunction with accompanying drawing.
Embodiment one
Refer to Fig. 1, present invention is disclosed a kind of underground heat well head electric power station system based on ORC system, described underground heat well head electric power station system includes: the second gas-liquid separator 1, flash distillation fill the 2, the 3rd screw expander the 3, the 4th screw expander the 4, the 3rd electromotor, the 4th electromotor, the first ORC system, the second ORC system; Described 3rd electromotor, the 4th electromotor can be same pair and go out shaft generator 5.
First end of described second gas-liquid separator 1 connects the 3rd screw expander 3, and saturated vapor enters the 3rd screw expander 3; 3rd screw expander 3 connect double; two go out shaft generator 5, the 3rd screw expander 3 connects the first ORC system.
Second end of described second gas-liquid separator 1 connects flash tank 2, flash tank connects 2 and connects the 4th screw expander 4, High Temperature High Pressure salt enters flash tank 2, the steam flashed off enters the 4th screw expander 4,4th screw expander 4 outlet vapor and the mixing of the 3rd screw expander 3 outlet vapor, mixed steam enters the first ORC system;4th screw expander 4 connect double; two go out shaft generator 5, the 4th screw expander 4 is also connected with the first ORC system. Described flash tank 2 connects the second ORC system; The outlet of described flash tank can also connect one the 3rd gas-liquid separator.
Described first ORC system includes first vaporizer the 11, first preheater the 12, first working medium conveying mechanism the 13, first condenser the 14, first screw expander the 15, first electromotor the 16, first gas-liquid separator 17. 3rd screw expander the 3, the 4th screw expander 4 connects the first vaporizer 11 respectively; First vaporizer the 11, first preheater the 12, first working medium conveying mechanism the 13, first condenser the 14, first screw expander 15 is sequentially connected with, and the first screw expander 15 connects first electromotor the 16, first vaporizer 11 respectively; First preheater 12 connects the first gas-liquid separator 17, and the first isolated incoagulable gas emptying of gas-liquid separator 17, the liquid separated is delivered to inverted well by the first conveying mechanism, refills underground.
Described second ORC system includes second vaporizer the 21, second preheater the 22, second working medium conveying mechanism the 23, second condenser the 24, second screw expander the 25, second electromotor 26; Described flash tank 2 connects the second vaporizer 21; Second vaporizer the 21, second preheater the 22, second working medium conveying mechanism the 23, second condenser the 24, second screw expander 25 is sequentially connected with, and the second screw expander 25 connects second electromotor the 26, second vaporizer 21 respectively; The outlet salt of the second preheater 22 is delivered to inverted well by second conveyor structure, refills underground.
In the present embodiment, described first condenser, the second condenser are air cooled condenser, water cooled condenser or evaporative condenser.
Being described above the present invention composition based on the underground heat well head electric power station system of ORC system, the present invention, while explaining said system, also discloses the electricity-generating method of above-mentioned underground heat well head electric power station system, and described electricity-generating method comprises the steps:
Step S1, the steam water interface exported by geothermal well are introduced into the second gas-liquid separator in advance, and after first separation, saturated vapor enters the 3rd screw expander, and High Temperature High Pressure salt enters flash tank;
Step S2, the steam flashed off enter the 4th screw expander;
Step S3, the 4th screw expander outlet vapor and the mixing of the 3rd screw expander outlet vapor, mixed steam enters the first ORC system; First ORC system configuration gas-liquid separator, empties incoagulable gas therein, and the liquid separated is delivered to inverted well by the first conveying mechanism, refills underground;
Step S4, being entered the second ORC system by flash tank high-temperature bittern out, the preheater outlet salt of the second ORC system is delivered to inverted well by second conveyor structure, refills underground.
Embodiment two
The present embodiment and embodiment one are distinctive in that, in the present embodiment, working medium conveying mechanism (the first working medium conveying mechanism, the second working medium conveying mechanism) is combination working medium pump, described combination working medium pump includes at least one variable frequency pump and at least one fixed frequency pump, each variable frequency pump, the parallel connection of pumps of fixed frequency.
In warm up phase, starting up's stage and partial load condition situation, only with variable frequency pump, or, adopt part or all of variable frequency pump and the combination of partly or entirely fixed frequency pump; In operating mode at full capacity, by fully open to variable frequency pump and fixed frequency pump.
Meanwhile, described system also includes the second automatic identification module of operating mode, the second demand computing module, the second handover module.
The described second automatic identification module of operating mode is in order to identify the operating mode residing for system, it is judged that system is in which kind of operating mode in warm up phase, starting up's stage, partial load condition, at full capacity operating mode.
Described second demand computing module calculates kind and the quantity of the working medium pump needed in order to the result according to described second module identification.
Described second handover module is in order to the switch of each working medium pump in the result automatic control combination working medium pump according to described second demand computing module calculating.
Additionally, described system includes DBM, DBM includes the first synopsis, and in the first synopsis, storage has each crucial operating mode to need kind and the quantity of working medium conveying mechanism.
Embodiment three
The present embodiment and embodiment one are distinctive in that, in the present embodiment, condenser (the first condenser, the second condenser) is combination condenser, combination condenser includes at least one air cooled condenser and at least one evaporative condenser, and each air cooled condenser, evaporative condenser are in parallel.
When ambient temperature is higher than the first design temperature, evaporative condenser plays a major role, and reduces the condensation temperature of system. When ambient temperature is lower than the second design temperature, air cooled condenser plays a major role, reduce the condensation temperature of system.
Additionally, described system also includes the second automatic identification module of operating mode, the second demand computing module, the second handover module.
The described second automatic identification module of operating mode is in order to identify the operating mode residing for system, it is judged that whether whether environment higher than the first design temperature, lower than the second design temperature.
Described combination condenser includes some condenser units, and described second demand computing module calculates kind and the quantity of the condenser unit needed in order to the result according to the described second automatic identification module identification of operating mode.
Described second handover module is in order to the switch of each condenser unit in the result automatic control combination condenser according to described second demand computing module calculating.
Additionally, described system can also include DBM, DBM includes the second synopsis, and in the second synopsis, storage has each critical environments temperature to need kind and the quantity of condenser unit.
In sum, the present invention propose the underground heat well head electric power station system based on ORC system and electricity-generating method, the utilization ratio to underground heat can be improved. The present invention can for solely hot well allocation plan, and system is easy, it is simple to install. This system can realize energy classified utilization, and the pressure first with underground heat well head can generate electricity, and next utilizes underground heat heat energy to carry out secondary electricity generation, and utilization efficiency of heat energy is high. Additionally this system is the environment friendly system of 100%, it is possible to achieve 100% geothermal water reinjection. The present invention is directed to the Land use systems of solely hot well, be the heat utilization mode efficiently at a kind of well one station.
Here description of the invention and application is illustrative, is not wishing to limit the scope of the invention in above-described embodiment. The deformation of embodiments disclosed herein and change are possible, for those skilled in the art embodiment replace and the various parts of equivalence are known. It should be appreciated by the person skilled in the art that when without departing from the spirit of the present invention or substitutive characteristics, the present invention can in other forms, structure, layout, ratio, and realize with other assembly, material and parts. When without departing from the scope of the invention and spirit, it is possible to embodiments disclosed herein is carried out other deformation and changes.
Claims (8)
1. the underground heat well head electric power station system based on ORC system, it is characterized in that, described underground heat well head electric power station system includes: the second gas-liquid separator, flash distillation filling, the 3rd screw expander, the 4th screw expander, the 3rd electromotor, the 4th electromotor, the first ORC system, the second ORC system; Described 3rd electromotor, the 4th electromotor are same a pair of shaft electromotor;
First end of described second gas-liquid separator connects the 3rd screw expander, and saturated vapor enters the 3rd screw expander; 3rd screw expander connects the 3rd electromotor, and the 3rd screw expander air vent connects the first ORC system and the air vent of the 4th screw expander;
Second end of described second gas-liquid separator connects flash tank, flash tank connects the 4th screw expander, High Temperature High Pressure salt enters flash tank, the steam flashed off enters the 4th screw expander, 4th screw expander outlet vapor and the mixing of the 3rd screw expander outlet vapor, mixed steam enters the first ORC system; 4th screw expander connects the 4th electromotor, and the 4th screw expander is also connected with the first ORC system; Described flash tank connects the second ORC system, and the high-temperature bittern after flash distillation enters the second ORC system; The outlet of described flash tank is also connected with one the 3rd gas-liquid separator;
Described first ORC system includes the first vaporizer, the first preheater, the first working medium conveying mechanism, the first condenser, the first screw expander, the first electromotor, the first gas-liquid separator; 3rd screw expander, the 4th screw expander connect the first vaporizer respectively; First vaporizer, the first preheater, the first working medium conveying mechanism, the first condenser, the first screw expander are sequentially connected with, and the first screw expander connects the first electromotor, the first vaporizer respectively; First preheater connects the first gas-liquid separator, the incoagulable gas emptying that the first gas-liquid separator separates goes out, and the liquid separated is delivered to inverted well by the first conveying mechanism, refills underground;
Described second ORC system includes the second vaporizer, the second preheater, the second working medium conveying mechanism, the second condenser, the second screw expander, the second electromotor; Described flash tank connects the second vaporizer; Second vaporizer, the second preheater, the second working medium conveying mechanism, the second condenser, the second screw expander are sequentially connected with, and the second screw expander connects the second electromotor, the second vaporizer respectively; The outlet salt of the second preheater is delivered to inverted well by second conveyor structure, refills underground;
Described first condenser, the second condenser are air cooled condenser, water cooled condenser or evaporative condenser.
2. the underground heat well head electric power station system based on ORC system, it is characterized in that, described underground heat well head electric power station system includes: the second gas-liquid separator, flash distillation filling, the 3rd screw expander, the 4th screw expander, the 3rd electromotor, the 4th electromotor, the first ORC system, the second ORC system;
First end of described second gas-liquid separator connects the 3rd screw expander, and saturated vapor enters the 3rd screw expander; 3rd screw expander connects the 3rd electromotor, and the 3rd screw expander air vent connects the first ORC system and the air vent of the 4th screw expander;
Second end of described second gas-liquid separator connects flash tank, flash tank connects the 4th screw expander, High Temperature High Pressure salt enters flash tank, the steam flashed off enters the 4th screw expander, 4th screw expander outlet vapor and the mixing of the 3rd screw expander outlet vapor, mixed steam enters the first ORC system;4th screw expander connects the 4th electromotor, and the 4th screw expander is also connected with the first ORC system; Described flash tank connects the second ORC system.
3. the underground heat well head electric power station system based on ORC system according to claim 2, it is characterised in that:
Described first ORC system includes the first vaporizer, the first preheater, the first working medium conveying mechanism, the first condenser, the first screw expander, the first electromotor, the first gas-liquid separator; 3rd screw expander, the 4th screw expander connect the first vaporizer respectively; First vaporizer, the first preheater, the first working medium conveying mechanism, the first condenser, the first screw expander are sequentially connected with, and the first screw expander connects the first electromotor, the first vaporizer respectively; First preheater connects the first gas-liquid separator, and the incoagulable gas emptying that the first gas-liquid separator separates goes out, the liquid separated is delivered to inverted well by the first conveying mechanism, refills underground.
4. the underground heat well head electric power station system based on ORC system according to claim 2, it is characterised in that:
Described second ORC system includes the second vaporizer, the second preheater, the second working medium conveying mechanism, the second condenser, the second screw expander, the second electromotor; Described flash tank connects the second vaporizer; Second vaporizer, the second preheater, the second working medium conveying mechanism, the second condenser, the second screw expander are sequentially connected with, and the second screw expander connects the second electromotor, the second vaporizer respectively; The outlet salt of the second preheater is delivered to inverted well by second conveyor structure, refills underground.
5. the underground heat well head electric power station system based on ORC system according to claim 2, it is characterised in that:
Described 3rd electromotor, the 4th electromotor are same a pair of shaft electromotor.
6. the underground heat well head electric power station system based on ORC system according to claim 2, it is characterised in that:
The outlet of described flash tank connects one the 3rd gas-liquid separator.
7. the underground heat well head electric power station system based on ORC system according to claim 2, it is characterised in that:
Described first ORC system, the second ORC system condenser be air cooled condenser, water cooled condenser or evaporative condenser.
8. the electricity-generating method of the underground heat well head electric power station system that one of claim 1 to 7 is described, it is characterised in that described electricity-generating method comprises the steps:
Step S1, the steam water interface exported by geothermal well are introduced into the second gas-liquid separator in advance, and after first separation, saturated vapor enters the 3rd screw expander, and High Temperature High Pressure salt enters flash tank;
Step S2, the steam flashed off enter the 4th screw expander;
Step S3, the 4th screw expander outlet vapor and the mixing of the 3rd screw expander outlet vapor, mixed steam enters the first ORC system; First ORC system configuration gas-liquid separator, empties incoagulable gas therein or recharges, and the liquid separated is delivered to inverted well by the first conveying mechanism, refills underground;
Step S4, being entered the second ORC system by flash tank high-temperature bittern out, the preheater outlet salt of the second ORC system is delivered to inverted well by second conveyor structure, refills underground.
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| CN108104879A (en) * | 2018-01-17 | 2018-06-01 | 无锡锡压压缩机有限公司 | A kind of screw expander, helical-lobe compressor, the integrated system of motor |
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| CN113701397A (en) * | 2021-08-09 | 2021-11-26 | 三峡大学 | Geothermal energy grading high-efficiency multi-capacity system and operation method thereof |
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