CN104074691B - The geothermal energy coupled electricity-generation circulatory system and its method of work of a kind of low emission temperature - Google Patents
The geothermal energy coupled electricity-generation circulatory system and its method of work of a kind of low emission temperature Download PDFInfo
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Abstract
The geothermal energy coupled electricity-generation circulatory system of a kind of low emission temperature, it is characterised in that it includes the ammoniacal liquor dynamic power cycling element and low boiling working fluid power cycle unit that intercouple；Its method of work is GEOTHERMAL WATER inflow, recharge, acting, heat release, blended absorbent, condensation, circulation, heat recovery；It is advantageous in that：Running efficiency of system and stability are high；The utilization rate of middle low temperature geothermal water is effectively improved, thermal pollution is reduced；Rationally, the thermal efficiency is improved cost；Application value is high.
Description
(1) technical field：
The present invention relates to a kind of heat energy Conversion and Utilization technology, the low emission temperature for especially being generated electricity using underground heat completely
The geothermal energy coupled electricity-generation circulatory system and its method of work of degree.
(2) background technology：
At present, middle low-temperature electricity-generating technology is study hotspot and the Industry Promotion direction in energy development field, low due in
The energy grad of warm geothermal energy is relatively low so that its Land use systems is more single and utilization ratio cannot be improved.In at present cryogenically
Hot power generation cycle system increasingly attracts attention, and makes full use of the main optimization mesh that low grade heat energy is the geothermal power generation circulatory system
Mark.The stability of current Kalina and ORC power generation cycle systems is preferably and the attention rate that is subject to is higher.Kalina power generation cycles
Main advantage is operational efficiency higher, and the working medium feature of environmental protection is preferable.But the temperature range of its geothermal energy resources for utilizing is limited, profit
The temperature of the GEOTHERMAL WATER after is still higher.The temperature of weak solution is higher simultaneously, increases the burden of high temperature regenerator.It is another
Attention rate ORC power generation cycle system ranges of application higher are wider, and safety and stability is obtained for extensive accreditation, particularly
Prominent is that its available heat source temperature is relatively low, considerably increases the scope of available resources.But the construction of ORC power generation cycles into
This is slightly higher, and the characteristics of ORC power generation cycle working medium evaporation at constant temperatures so that under the conditions of specific working medium irreversible loss still compared with
Greatly.Therefore a kind of geothermal energy coupled electricity-generation circulatory system of low emission temperature is proposed, the advantage of two kinds of circulations is combined, can
To effectively improve the utilization rate of geothermal energy resources, and improve the operational efficiency and stability of power generation cycle system.
(3) content of the invention：
The geothermal energy coupled electricity-generation circulatory system and its work side it is an object of the invention to provide a kind of low emission temperature
Method, it can solve the above problems, be a kind of simple structure, easily realize can improve in low temperature underground heat power generation cycle efficiency
With the system of stability.
Technical scheme：A kind of geothermal energy coupled electricity-generation circulatory system of low emission temperature, it is characterised in that it
Including the ammoniacal liquor dynamic power cycling element and low boiling working fluid power cycle unit that intercouple；Wherein, the wherein ammoniacal liquor
Power cycle unit is by generator, separator, steam turbine I, high temperature regenerator, pressure-reducing valve, absorber, condenser I, working medium pump I
Composition；The low boiling working fluid power cycle unit is made up of steam turbine II, condenser II, working medium pump II, preheater；Wherein,
The generator is in be connected in series with separator；The top of the separator is connected with steam turbine I, its underpart and high temperature regenerator
And pressure-reducing valve is sequentially connected in series；The pressure-reducing valve is parallel with one another with steam turbine I, and is serially connected with the two ends of absorber；The absorber
It is in successively to be connected in series with condenser I, working medium pump I and generator 1；The preheater and high temperature regenerator, steam turbine II, condensation
Device II and working medium pump II is connected in concatenation；The preheater is connected with generator.
The hot water side entrance of the generator flows into high-temperature-hot-water；The ammonia-water mixture side of the generator and entering for separator
Mouth end is in be connected in series；The top ammonia outlet of the separator is connected with the entrance of steam turbine I, the weak aqua ammonia outlet of its underpart
It is sequentially connected in series with the high temperature ammoniacal liquor side entrance of high temperature regenerator and the entrance of pressure-reducing valve；The outlet of the pressure-reducing valve and steam turbine I
Outlet it is parallel with one another, and be serially connected with the entrance two ends of absorber；The port of export of the absorber and the arrival end of condenser I,
The arrival end of working medium pump I and the arrival end of generator are in successively to be connected in series；The entrance of the condenser I flows into cooling water, leads to
Cross the outlet discharge of condenser I；The entrance of the condenser II also flows into cooling water, is flowed out by the outlet of condenser II；Institute
The hot water side of preheater is stated to be connected with the hot water outlet of generator；The port of export of the preheater and the low temperature side of high temperature regenerator
Inlet in series；GEOTHERMAL WATER after the outlet drain utilization of the preheater；The arrival end of the preheater is connected with working medium pump II；
The high temperature regenerator low temperature side outlet is connected with steam turbine II, condenser II and working medium pump II in concatenation.
The cycle fluid of the ammoniacal liquor dynamic power cycling element is ammonia water mixture.
Steam turbine I loop interior circulations material is ammonia water mixture in the ammoniacal liquor dynamic power cycling element；It is described low
Steam turbine II loop interior circulations material is low-boiling point material in boiling point working medium power cycle unit.
The low-boiling point material is freon.
The high temperature regenerator uses shell and tube exchanger, internal heat pipeline to use carbon steel material, and pipeline is using efficient
Spiral heat exchange tube.
It is the high temperature regenerator of the geothermal energy coupled electricity-generation circulatory system of the low emission temperature, absorber, condenser I, cold
Condenser II, the outside of preheater are surrounded by tight insulation material.
The geothermal energy coupled electricity-generation circulatory system of the low emission temperature, its GEOTHERMAL WATER can be using middle temperature GEOTHERMAL WATER Tanaka's
GEOTHERMAL WATER, its temperature is 90-150 DEG C.
Working medium pump I8, the working medium pump II of the geothermal energy coupled electricity-generation circulatory system of the low emission temperature drive required electric energy
There is provided by Turbo-generator Set I and Turbo-generator Set II.
The method of work of the geothermal energy coupled electricity-generation circulatory system of a kind of low emission temperature, it is characterised in that it includes following
Step：
1. the ammoniacal liquor in middle low temperature geothermal water inflow generator in heating ammoniacal liquor dynamic power cycling element in working medium pump is mixed
Solution is closed, geothermal tail water enters recharge after preheater heating low boiling working fluid from after generator discharge；
2. generator working medium side is connected in series with separator, and the gas of separator is connected with steam turbine I, the gas after separation
Into steam turbine I actings；
3. separator lower manifold is connected with high temperature regenerator, and dilute ammonia solution enters in high temperature regenerator releases heat,
Low boiling working fluid is heated again；
4. high temperature regenerator and steam turbine I are connected in absorber and condenser I, and the weak aqua ammonia from high temperature regenerator is molten
The weary gas that liquid is discharged with steam turbine I mixes, absorbs, and enters in condenser I condense therewith, and absorption process liberated heat is by condensing
Device I is discharged into environment；
5. condenser I, working medium pump I and generator are connected in series, and the ammonia water mixture after condensed device I coolings is by working medium
After pump I pressurizations, it is fed again into completing to circulate next time in generator；
6. high temperature regenerator, steam turbine II, condenser II, working medium pump II and preheater are connected in series, and work is mixed with ammoniacal liquor
Matter circulation is in parallel；
7. generated electricity in steam turbine II acting, the low boiling after acting are entered by the low boiling working fluid after the heating of high temperature regenerator
Point working medium is condensed into liquid condition into condenser II, subsequently enters pressurization in working medium pump II；
8. the low boiling working fluid after pressurizeing absorbs the heat from geothermal tail water by preheater, in making full use of cryogenically
Hot water, while realizing the recovery of low temperature heat energy.
Operation principle of the invention：Using the low boiling working fluid in the geothermal tail water heating system of lower temperature, high temperature is returned
Temperature weak solution higher heats low boiling working fluid again in hot device, lifts the temperature grade and acting ability of working medium；Two are moved
Power cyclic process constitutes the geothermal energy coupled electricity-generation circulatory system of low emission temperature, and common group of respective cycle fluid is respectively adopted
Into middle low temperature underground heat power generation cycle, the advantage of two kinds of circulations is put together, the operation effect of low temperature underground heat power generation cycle in raising
Rate and the stability of application.
It is of the invention to be advantageous in that：1st, using energy, the principle of mass conservation, on the premise of low cost input, invention
The geothermal energy coupled electricity-generation circulatory system of low emission temperature；2nd, the advantage of low temperature underground heat power generation cycle system in main flow is combined
And feature, it is ensured that running efficiency of system and stability, the utilization rate of middle low temperature geothermal water can be effectively improved, reduce GEOTHERMAL WATER
Exhaust temperature and reduce thermal pollution to environment；What the 3rd, the coupled electricity-generation circulatory system was used is using more ripe dress
Put, part, there is no the part of appliance of special manufacture, and manufacturing cost will not be dramatically increased；4th, the change of ammonia-water mixture is made full use of
The characteristic of temperature evaporation, improves the thermal efficiency of system；5th, any influence is not resulted on environment using this circulatory system, and it is low in
The popularization of warm geothermal power station has certain application value.
(4) illustrate：
Accompanying drawing is a kind of structured flowchart of the geothermal energy coupled electricity-generation circulatory system of low emission temperature involved by the present invention.
Wherein, 1 is generator；1-1 is the hot water side entrance of generator；1-2 is the hot water outlet of generator；1-3 is hair
The arrival end of raw device；1-4 is the ammonia-water mixture side of generator；2 is separator；2-1 is the arrival end of separator；2-2 is separation
The top ammonia outlet of device；2-3 is exported for the weak aqua ammonia of bottom；3 is steam turbine I3；4 is high temperature regenerator；4-1 is Ammonia
Water side entrance；4-2 is the entrance of pressure-reducing valve；4-3 is the low temperature side entrance of high temperature regenerator；4-4 is the low temperature of high temperature regenerator
Side outlet；5 is pressure-reducing valve；6 is absorber；6-1 is the outlet of pressure-reducing valve；6-2 is the outlet of steam turbine I；6-3 is absorber
The port of export；7 is condenser I；7-1 is the arrival end of condenser I；7-2 is the arrival end of working medium pump I；7-3 enters for condenser I's
Mouthful；7-4 is the outlet of condenser I；8 is working medium pump I；9 is steam turbine II；10 is condenser II；10-3 is condenser II entrances；
10-4 is exported for condenser II；11 is working medium pump II；12 is preheater 12；12-1 is the hot water side of preheater；12-2 is preheating
The outlet of device；12-3 is the arrival end of preheater；12-4 is the port of export of preheater.
(5) specific embodiment：
Embodiment：The geothermal energy coupled electricity-generation circulatory system (see Fig. 1) of a kind of low emission temperature, it is characterised in that it includes
The ammoniacal liquor dynamic power cycling element and low boiling working fluid power cycle unit for intercoupling；Wherein, the wherein ammoniacal liquor power
Cycling element is by generator 1, separator 2, steam turbine I3, high temperature regenerator 4, pressure-reducing valve 5, absorber 6, condenser I7, working medium
Pump I8 is constituted；The low boiling working fluid power cycle unit is by steam turbine II9, condenser II10, working medium pump II11, preheater 12
Composition；Wherein, the generator 1 is in be connected in series with separator 2；The top of the separator 2 is connected with steam turbine I3, under it
Portion is sequentially connected in series with high temperature regenerator 4 and pressure-reducing valve 5；The pressure-reducing valve 5 is parallel with one another with steam turbine I3, and is serially connected with absorber
6 two ends；The absorber 6 is in successively to be connected in series with condenser I7, working medium pump I8 and generator 1；The preheater 12 with
High temperature regenerator 4, steam turbine II9, condenser II10 and working medium pump II11 are connected in concatenation；The preheater 12 and generator 1
Connection.
The hot water side entrance 1-1 of the generator 1 flows into high-temperature-hot-water；The ammonia-water mixture side 1-4 of the generator 1 with point
It is in be connected in series from the arrival end 2-1 of device 2；The top ammonia outlet 2-2 of the separator 2 is connected with the entrance of steam turbine I3,
The weak aqua ammonia outlet 2-3 and high temperature ammoniacal liquor side entrance 4-1 of the high temperature regenerator 4 and entrance 4-2 of pressure-reducing valve 5 of its underpart goes here and there successively
Connection；The outlet 6-2 of the outlet 6-1 and steam turbine I3 of the pressure-reducing valve 5 is parallel with one another, and is serially connected with the entrance two ends of absorber 6；
Arrival end 7-1, the arrival end 7-2 of working medium pump I8 of the port of export 6-3 and condenser I7 of the absorber 6 and entering for generator 1
Mouth end 1-3 is in successively to be connected in series；The entrance 7-3 of the condenser I7 flows into cooling water, is arranged by the outlet 7-4 of condenser I7
Go out；The entrance 10-3 of the condenser II10 also flows into cooling water, is flowed out by the outlet 10-4 of condenser II10；The preheating
The hot water side 12-1 of device 12 is connected with the hot water outlet 1-2 of generator 1；The port of export 12-4 of the preheater 12 and high temperature backheat
The low temperature side entrance 4-3 series connection of device 4；GEOTHERMAL WATER after the outlet 12-2 discharge utilizations of the preheater 12；The preheater 12
Arrival end 12-3 be connected with working medium pump II11；The low temperature side outlet 4-4 of the high temperature regenerator 4 and steam turbine II9, condenser
II10 and working medium pump II11 is in concatenation connection (see Fig. 1).
The cycle fluid of the ammoniacal liquor dynamic power cycling element is ammonia water mixture.
Steam turbine I1 loop interior circulations material is ammonia water mixture in the ammoniacal liquor dynamic power cycling element；It is described low
Steam turbine II9 loop interior circulations material is low-boiling point material in boiling point working medium power cycle unit.
The low-boiling point material is freon.
The high temperature regenerator 4 uses shell and tube exchanger, internal heat pipeline to use carbon steel material, and pipeline is using efficient
Spiral heat exchange tube.
The high temperature regenerator 4 of the geothermal energy coupled electricity-generation circulatory system of the low emission temperature, absorber 6, condenser I7,
Condenser II10, the outside of preheater 12 are surrounded by tight insulation material.
The geothermal energy coupled electricity-generation circulatory system of the low emission temperature, its GEOTHERMAL WATER can be using middle temperature GEOTHERMAL WATER Tanaka's
GEOTHERMAL WATER, its temperature is 120 DEG C.
Working medium pump I8, the working medium pump II11 of the geothermal energy coupled electricity-generation circulatory system of the low emission temperature are electric needed for driving
Can be provided (see Fig. 1) by Turbo-generator Set I3 and Turbo-generator Set II9.
A kind of method of work (see Fig. 1) of the geothermal energy coupled electricity-generation circulatory system of low emission temperature, it is characterised in that it
Comprise the following steps：
1. the ammoniacal liquor in middle low temperature geothermal water inflow generator 1 in heating ammoniacal liquor dynamic power cycling element in working medium pump is mixed
Solution is closed, geothermal tail water enters recharge after the heating low boiling working fluid of preheater 12 from after the discharge of generator 1；
2. the working medium side of generator 1 is connected in series with separator 2, and the gas of separator 2 is connected with steam turbine I3, after separation
Gas does work into steam turbine I3；
3. the lower manifold of separator 2 is connected with high temperature regenerator 4, and dilute ammonia solution enters releases heat in high temperature regenerator 4
Amount, heats low boiling working fluid again；
4. high temperature regenerator 4 and steam turbine I3 are connected in absorber 6 and condenser I7, from the dilute of high temperature regenerator 4
The weary gas that ammonia spirit is discharged with steam turbine I3 mixes, absorbs, and enters in condenser I7 condense therewith, the heat that absorption process is released
Amount is discharged into environment by condenser I7；
5. condenser I7, working medium pump I8 and generator 1 are connected in series, the ammonia water mixture after condensed device I7 cooling by
After working medium pump I8 pressurizations, it is fed again into completing to circulate next time in generator 1；
6. high temperature regenerator 4, steam turbine II9, condenser II10, working medium pump II11 and preheater 12 are connected in series, with ammonia
The circulation of water mixed working fluid is in parallel；
7. the acting that generated electricity in steam turbine II9 is entered by the low boiling working fluid after the heating of high temperature regenerator 4, it is low after acting
Boiling point working medium is condensed into liquid condition into condenser II10, subsequently enters pressurization in working medium pump II11；
8. the low boiling working fluid after pressurizeing absorbs the heat from geothermal tail water by preheater 12, makes full use of middle low temperature
GEOTHERMAL WATER, while realizing the recovery of low temperature heat energy.
Claims (10)
1. the geothermal energy coupled electricity-generation circulatory system of a kind of low emission temperature, it is characterised in that it includes that the ammoniacal liquor for intercoupling is moved
Power power generation cycle unit and low boiling working fluid power cycle unit；Wherein, the wherein ammoniacal liquor power cycle unit by generator,
Separator, steam turbine I, high temperature regenerator, pressure-reducing valve, absorber, condenser I, working medium pump I compositions；The low boiling working fluid is moved
Power cycling element is made up of steam turbine II, condenser II, working medium pump II, preheater；Wherein, the generator and separator are in string
Connection connection；The top of the separator is connected with steam turbine I, and its underpart is sequentially connected in series with high temperature regenerator and pressure-reducing valve；It is described
Pressure-reducing valve is parallel with one another with steam turbine I, and is serially connected with the two ends of absorber；The absorber and condenser I, working medium pump I and hair
Raw device 1 is in successively to be connected in series；The preheater is in concatenate with high temperature regenerator, steam turbine II, condenser II and working medium pump II
Connection；The preheater is connected with generator.
2. the geothermal energy coupled electricity-generation circulatory system of a kind of low emission temperature according to claim 1, it is characterised in that described
The hot water side entrance of generator flows into high-temperature-hot-water；The ammonia-water mixture side of the generator is in the company of series connection with the arrival end of separator
Connect；The top ammonia outlet of the separator is connected with the entrance of steam turbine I, the weak aqua ammonia outlet and high temperature regenerator of its underpart
High temperature ammoniacal liquor side entrance and the entrance of pressure-reducing valve be sequentially connected in series；The outlet of the pressure-reducing valve is with the outlet of steam turbine I mutually simultaneously
Connection, and it is serially connected with the entrance two ends of absorber；The port of export of the absorber and the arrival end of condenser I, the entrance of working medium pump I
The arrival end of end and generator is in successively to be connected in series；The entrance of the condenser I flows into cooling water, by going out for condenser I
Mouth discharge；The entrance of the condenser II also flows into cooling water, is flowed out by the outlet of condenser II；The hot water of the preheater
Side is connected with the hot water outlet of generator；The port of export of the preheater and the low temperature side inlet in series of high temperature regenerator；It is described
GEOTHERMAL WATER after the outlet drain utilization of preheater；The arrival end of the preheater is connected with working medium pump II；The high temperature backheat
Device low temperature side outlet is connected with steam turbine II, condenser II and working medium pump II in concatenation.
3. the geothermal energy coupled electricity-generation circulatory system of a kind of low emission temperature according to claim 1, it is characterised in that described
The cycle fluid of ammoniacal liquor dynamic power cycling element is ammonia water mixture.
4. the geothermal energy coupled electricity-generation circulatory system of a kind of low emission temperature according to claim 1, it is characterised in that described
Steam turbine I loop interior circulations material is ammonia water mixture in ammoniacal liquor dynamic power cycling element；The low boiling working fluid power
Steam turbine II loop interior circulations material is low-boiling point material in cycling element.
5. the geothermal energy coupled electricity-generation circulatory system of a kind of low emission temperature according to claim 4, it is characterised in that described
Low-boiling point material is freon.
6. the geothermal energy coupled electricity-generation circulatory system of a kind of low emission temperature according to claim 1, it is characterised in that described
High temperature regenerator uses shell and tube exchanger, internal heat pipeline to use carbon steel material, pipeline to use high-efficiency helical heat exchanger tube.
7. the geothermal energy coupled electricity-generation circulatory system of a kind of low emission temperature according to claim 1, it is characterised in that described
High temperature regenerator, absorber, condenser I, condenser II, the preheater of the geothermal energy coupled electricity-generation circulatory system of low emission temperature
Outside be surrounded by tight insulation material.
8. the geothermal energy coupled electricity-generation circulatory system of a kind of low emission temperature according to claim 1, it is characterised in that described
The geothermal energy coupled electricity-generation circulatory system of low emission temperature, its GEOTHERMAL WATER can be using the GEOTHERMAL WATER of middle temperature GEOTHERMAL WATER Tanaka, its temperature
Spend is 90-150 DEG C.
9. the geothermal energy coupled electricity-generation circulatory system of a kind of low emission temperature according to claim 1, it is characterised in that described
Working medium pump I8, working medium pump II drive required electric energy to be provided by Turbo-generator Set I and Turbo-generator Set II.
10. the method for work of the geothermal energy coupled electricity-generation circulatory system of a kind of low emission temperature, it is characterised in that it includes following
Step：
1. the ammoniacal liquor mixing in middle low temperature geothermal water inflow generator in heating ammoniacal liquor dynamic power cycling element in working medium pump is molten
Liquid, geothermal tail water enters recharge after preheater heating low boiling working fluid from after generator discharge；
2. generator working medium side is connected in series with separator, and the gas of separator is connected with steam turbine I, and the gas after separation enters
Steam turbine I does work；
3. separator lower manifold is connected with high temperature regenerator, and dilute ammonia solution enters in high temperature regenerator releases heat, again
Heating low boiling working fluid；
4. high temperature regenerator and steam turbine I are connected in absorber and condenser I, the dilute ammonia solution from high temperature regenerator with
The weary gas mixing of steam turbine I discharges, absorption, enter in condenser I condense therewith, and absorption process liberated heat is by condenser I
It is discharged into environment；
5. condenser I, working medium pump I and generator are connected in series, and the ammonia water mixture after condensed device I coolings is by working medium pump I
After pressurization, it is fed again into completing to circulate next time in generator；
6. high temperature regenerator, steam turbine II, condenser II, working medium pump II and preheater are connected in series, and are followed with ammonia water mixture
Ring is in parallel；
7. generated electricity in steam turbine II acting, the low boiling work after acting are entered by the low boiling working fluid after the heating of high temperature regenerator
Matter is condensed into liquid condition into condenser II, subsequently enters pressurization in working medium pump II；
8. the low boiling working fluid after pressurizeing absorbs the heat from geothermal tail water by preheater, makes full use of middle low temperature underground heat
Water, while realizing the recovery of low temperature heat energy.
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| WO2009134271A1 (en) * | 2008-05-02 | 2009-11-05 | Utc Power Corporation | Combined geothermal and solar thermal organic rankine cycle system |
| WO2011073469A1 (en) * | 2009-12-15 | 2011-06-23 | /Andaluza De Sistemas Y Control Energetico, S.L. | Geothermal plant with system for generating electricity and modulating power |
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Effective date of registration: 20201218 Address after: 300400 Block C, Beichen building, 1 Longzhou Road, Beichen District, Tianjin Patentee after: SINOMA ENERGY CONSERVATION Ltd. Address before: 300384 No. 391 Binshui West Road, Xiqing District, Tianjin Patentee before: TIANJIN University OF TECHNOLOGY |