CN114753897A - Reheating thermal power generating unit and photo-thermal combined power generation and steam supply system - Google Patents
Reheating thermal power generating unit and photo-thermal combined power generation and steam supply system Download PDFInfo
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- CN114753897A CN114753897A CN202210262889.5A CN202210262889A CN114753897A CN 114753897 A CN114753897 A CN 114753897A CN 202210262889 A CN202210262889 A CN 202210262889A CN 114753897 A CN114753897 A CN 114753897A
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- 238000010248 power generation Methods 0.000 title claims abstract description 60
- 238000003303 reheating Methods 0.000 title abstract description 14
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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
- F01K13/00—General layout or general methods of operation of complete plants
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/10—Adaptations for driving, or combinations with, electric generators
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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
- F01K11/00—Plants characterised by the engines being structurally combined with boilers or condensers
- F01K11/02—Plants characterised by the engines being structurally combined with boilers or condensers the engines being turbines
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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
- F01K13/00—General layout or general methods of operation of complete plants
- F01K13/02—Controlling, e.g. stopping or starting
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
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- F03G6/00—Devices for producing mechanical power from solar energy
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Abstract
The invention discloses a reheating thermal power generating unit and photo-thermal combined power generation and steam supply system, which mainly adopts the technical scheme that a temperature and pressure reduction steam supply device is arranged; the thermal power generating unit comprises a boiler, a steam turbine connected with the boiler, a condensation unit connected with the steam turbine, and heater units respectively connected with the steam turbine and the condensation unit; the steam turbine comprises a steam turbine high-pressure cylinder and a steam turbine intermediate-pressure cylinder which are both connected with the boiler, and the steam turbine high-pressure cylinder is connected with the temperature and pressure reducing steam supply device through a first control valve and a second control valve; the photo-thermal heat collection group comprises a photo-thermal heat collector and a steam generator; the inlet of the steam generator is connected with the water feeding pump through the third control valve, the outlet of the steam generator is connected with the steam exhaust port of the high-pressure cylinder of the steam turbine through the fourth control valve and the first control valve, the outlet of the steam generator is connected with the temperature and pressure reducing steam supply device through the fourth control valve and the second control valve, and the superheated steam outlet of the steam generator is connected with the inlet of the medium-pressure cylinder of the steam turbine through the fifth control valve.
Description
Technical Field
The invention relates to the technical field of power generation, in particular to a reheating thermal power generating unit and photo-thermal combined power generation and steam supply system.
Background
In recent years, new energy power generation is rapidly increased, but the development of new energy is influenced by higher investment cost, particularly, the photo-thermal power generation technology has higher investment cost compared with wind power generation and photovoltaic power generation; meanwhile, the new energy power generation is limited by natural conditions, and the power generation of the new energy power generation also causes impact to a certain degree on a power grid. Therefore, the development of industrialization is severely restricted.
The existing thermal power generation equipment is combined with the heat energy generated by the photo-thermal power generation equipment, so that the investment cost of the photo-thermal power generation can be reduced undoubtedly, and the industrialization and the development of the photo-thermal power generation equipment are promoted.
Meanwhile, the power generation and heat supply of thermal power generation are combined with the photo-thermal power generation, the complementation of thermal power generation, photo-thermal power generation and heat supply can be realized, and the problem of instability of new energy power generation is solved. The mode can release the binding of power generation and heat supply of the thermoelectric generating set to a certain degree, thereby realizing thermoelectric decoupling of the thermoelectric generating set to a certain degree and increasing the scheduling flexibility and the deep peak regulation capability.
The reheating thermal power generating unit has higher proportion in the thermal power generating unit, combines the photo-thermal power generation with the power generation and heat supply of the reheating thermal power generating unit, and undoubtedly has wide prospect.
Disclosure of Invention
In view of the above, the invention provides a reheating thermal power generating unit and photo-thermal combined power generation and steam supply system, and mainly aims to solve the problem of unstable new energy power generation and realize complementation of thermal power generation, photo-thermal power generation and heat supply.
In order to achieve the purpose, the invention mainly provides the following technical scheme:
the embodiment of the invention provides a reheating thermal power generating unit and photo-thermal combined power generation and steam supply system.
It includes:
a temperature and pressure reducing steam supply device;
the thermal power generating unit comprises a boiler, a steam turbine connected with the boiler, a condensation unit connected with the steam turbine, and heater units respectively connected with the steam turbine and the condensation unit; the steam turbine comprises a steam turbine high-pressure cylinder and a steam turbine intermediate-pressure cylinder which are both connected with the boiler, and the steam turbine high-pressure cylinder is connected with the temperature and pressure reducing steam supply device through a first control valve and a second control valve; when the thermal power generating unit normally operates, steam generated by the boiler enters a high-pressure cylinder of a steam turbine to do work, wherein one path of the steam returns to the boiler to reheat and absorb heat, the reheated steam after absorbing heat enters the steam turbine to do work to become condensed water, then enters the boiler to absorb heat to become new steam again after passing through a condensation unit and a heater unit, and the other path of the steam enters a temperature-reducing and pressure-reducing steam supply device to supply heat to the outside, so that power generation and heat supply of a conventional thermal power plant are realized; the heater unit includes a feed pump;
the photo-thermal heat collection group comprises a photo-thermal heat collector and a steam generator; the inlet of the steam generator is connected with the feed pump through a third control valve, the outlet of the steam generator is connected with the steam outlet of the high-pressure cylinder of the steam turbine through a fourth control valve and a first control valve, the outlet of the steam generator is connected with the temperature and pressure reducing steam supply device through a fourth control valve and a second control valve, and the superheated steam outlet of the steam generator is connected with the inlet of the medium-pressure cylinder of the steam turbine through a fifth control valve; the photo-thermal collector is internally provided with a heat storage working medium, and the photo-thermal collection group is used for conveying the heat storage working medium from the photo-thermal collector to the steam generator and then from the steam generator to the photo-thermal collector to realize the storage and conveying circulation of the hot and cold working medium of the heat storage working medium;
the photo-thermal collector conveys hot working medium to the steam generator, the steam generator heats the feed water conveyed by the feed water pump to the steam pressure and the temperature which are the same as the steam at the steam outlet of the high-pressure cylinder of the steam turbine or the steam inlet of the medium-pressure cylinder of the steam turbine through the hot working medium, the power generation, heat supply and steam supply of the photo-thermal collector group are realized, and the simultaneous heat supply or the independent heat supply of the thermal power generating unit and the photo-thermal collector group are realized through the first control valve, the second control valve, the third control valve, the fourth control valve and the fifth control valve.
As mentioned above, the steam turbine further includes a low-pressure steam turbine cylinder, the superheated steam outlet of the boiler is connected to the inlet of the high-pressure steam turbine cylinder, the reheater inlet of the boiler is connected to the steam exhaust port of the high-pressure steam turbine cylinder, the outlet of the reheater of the boiler is connected to the intermediate-pressure steam turbine cylinder, the outlet of the intermediate-pressure steam turbine cylinder is connected to the inlet of the low-pressure steam turbine cylinder, and the low-pressure steam turbine cylinder is connected to the condensing unit;
as described above, the condensing unit includes a condenser connected to the low-pressure cylinder of the steam turbine and a condensate pump connected to the condenser;
the heater unit also comprises a low-pressure heater connected with the condensate pump, a deaerator and a high-pressure heater group which are respectively connected with the low-pressure heater and the water feeding pump; one end of the high-pressure heater group is connected with the feed pump, and the other end of the high-pressure heater group is connected with the boiler inlet; the high-pressure heater group comprises three high-pressure heaters which are connected in series, the steam extraction of the high-pressure cylinder of the steam turbine is respectively connected with the two high-pressure heaters, the steam extraction of the medium-pressure cylinder of the steam turbine is respectively connected with one high-pressure heater and the deaerator, and the steam extraction of the low-pressure cylinder of the steam turbine is connected with the low-pressure heater.
As described above, the photothermal heat collection unit further includes at least one hot working medium storage station connected to the photothermal heat collector and the steam generator inlet, at least one sixth control valve connected to the steam generator outlet, at least one cold working medium storage station connected to the at least one sixth control valve, at least one working medium transfer pump connected to the at least one cold working medium storage station, and at least one seventh control valve connected to the at least one working medium transfer pump and the photothermal heat collector, respectively.
As mentioned above, the photo-thermal collector adopts a trough photo-thermal collector; or,
the photo-thermal collector adopts a tower-type photo-thermal collector.
As mentioned above, the thermal storage working medium is thermal storage oil; or,
the heat storage working medium is molten salt.
As previously mentioned, the temperature of the thermal storage medium is greater than 350 ℃.
As previously described, the first control valve, the second control valve, the third control valve, the fourth control valve, and the fifth control valve are all regulating valves.
As previously described, the sixth control valve and the seventh control valve are both regulator valves.
By means of the technical scheme, the reheating thermal power generating unit and the photo-thermal combined power generation and steam supply system at least have the following advantages:
according to the reheating thermal power generating unit and photo-thermal combined power generation and steam supply system, the temperature-reducing and pressure-reducing steam supply device, the thermal power generating unit and the photo-thermal heat collection unit are arranged, so that the energy generated by the photo-thermal heat collection unit can be converted into electric energy and heat supply heat energy by utilizing the conventional thermal power generation equipment, the heat energy generated by the photo-thermal heat collection unit is transmitted to the thermal power generation, the thermal power generation equipment is not required to be built by photo-thermal investment, the power generation and heat supply of the photo-thermal equipment are realized, the investment cost of the photo-thermal power generation is effectively reduced, and the problem of instability of new energy power generation is solved; the thermal power generating unit and the photo-thermal heat collection unit can generate electricity and supply heat complementarily, and meanwhile peak regulation and thermoelectric decoupling of the thermal power generating unit can be achieved to a certain degree.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.
Drawings
FIG. 1 is a schematic structural diagram of a reheating thermal power generating unit and a photo-thermal combined power generation and steam supply system of the invention.
Detailed Description
To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description of the embodiments, structures, features and effects according to the present invention will be made with reference to the accompanying drawings and preferred embodiments, wherein the directions of arrows in the drawings are the power supply direction and the heat supply direction.
As shown in fig. 1, an embodiment of the present invention provides a reheat thermal power plant and photo-thermal combined power generation and steam supply system, which includes: the system comprises a temperature-reducing pressure-reducing steam supply device 10, a thermal power generating unit 20 and a photo-thermal heat collection unit 30.
As shown in fig. 1, the attemperation and pressure reduction steam supply device 10 includes an attemperation and pressure reduction device 101.
As shown in fig. 1, the thermal power generating unit 20 includes a boiler 201, a steam turbine 202 connected to the boiler 201, a condensing unit 203 connected to the steam turbine 202, and a heater unit 204 connected to the steam turbine 202 and the condensing unit 203, respectively; the steam turbine 202 comprises a steam turbine high-pressure cylinder 2021 and a steam turbine intermediate-pressure cylinder 2022 which are both connected with the boiler 201, and the steam turbine high-pressure cylinder 2021 is connected with the temperature-reducing and pressure-reducing steam supply device 10 through a first control valve 205 and a second control valve 206, so that power generation and heat supply of a conventional thermal power plant are realized; specifically, the steam outlet of the steam turbine high-pressure cylinder 2021 is connected to one end of the first control valve 205, the other end of the first control valve 205 is connected to one end of the second control valve 206, and the other end of the second control valve 206 is connected to the temperature and pressure reducer 11; the steam turbine 202 further comprises a turbine low pressure cylinder 2023, the superheated steam outlet of the boiler 201 is connected with the inlet of the turbine high pressure cylinder 2021, the reheater inlet of the boiler 201 is connected with the steam exhaust of the turbine high pressure cylinder 2021, the reheater outlet of the boiler 201 is connected with the turbine intermediate pressure cylinder 2022, the outlet of the turbine intermediate pressure cylinder 2022 is connected with the inlet of the turbine low pressure cylinder 2023, and the condensing unit 203 comprises a condenser 2031 connected with the turbine low pressure cylinder 2023 and a condensing water pump 2032 connected with the condenser 2031; the heater unit 204 includes a water feed pump 2041, a low-pressure heater 2042 connected to the condensate pump 2032, a deaerator 2043 and a high-pressure heater group 2044 respectively connected to the low-pressure heater 2042 and the water feed pump 2041; one end of the high-pressure heater group 2044 is connected to the feed pump 2041, and the other end of the high-pressure heater group 2044 is connected to the inlet of the boiler 201; the high-pressure heater group 2044 comprises three high-pressure heaters 20441 which are connected in series, steam extraction of the steam turbine high-pressure cylinder 2021 is respectively connected with the two high-pressure heaters 20441, steam extraction of the steam turbine intermediate-pressure cylinder 2022 is respectively connected with one high-pressure heater 20441 and the deaerator 2043, and steam extraction of the steam turbine low-pressure cylinder 2023 is connected with the low-pressure heater 2042. Under the condition that thermal power generation normally operates, steam generated by a boiler enters a steam turbine high-pressure cylinder to do work, then returns to the boiler to reheat and absorb heat all the way, the reheated steam after absorbing heat enters a steam turbine intermediate pressure cylinder and a steam turbine low-pressure cylinder to do work, then becomes condensed water, enters the boiler to absorb heat through a condenser, a condensed water pump, a low-pressure heater, a deaerator and a high-pressure heater, becomes new steam again, and enters a temperature and pressure reduction pressure reducer steam supply system to supply heat to the outside all the way. In the invention, the steam turbine comprises a thermal reheat power generation (heat supply) unit with capacity of any grade of 100MW grade, 200MW grade, 300MW grade, 600MW grade and 1000MW grade and a thermal system thereof, in particular a subcritical reheat power generation (industrial) steam supply system with 300MW grade and 600MW grade. The steam supply system of the thermal power generating unit for thermal power generation comprises a steam supply system with any pressure and temperature grade of 1-3MPa, in particular an industrial steam supply system with the pressure grade of 1-1.5MPa and the temperature of 250-.
As shown in fig. 1, the photothermal heat collection unit 30 includes a photothermal heat collector 301 and a steam generator 302; an inlet of the steam generator 302 is connected to the feed pump 2041 through a third control valve 303, an outlet of the steam generator 302 is connected with a steam outlet of the steam turbine high pressure cylinder 2021 through a fourth control valve 304 and the first control valve 205, the outlet of the steam generator 302 is connected with the temperature and pressure reducing steam supply device 10 through a fourth control valve 304 and a second control valve 206, so as to realize the transmission and conversion of the heat generated by the photo-thermal heat collection to the thermoelectric generator set, specifically, an inlet of the steam generator 302 is connected with one end of a third control valve 303, the other end of the third control valve 303 is connected with the water feed pump 2041, an outlet of the steam generator 302 is connected with one end of a fourth control valve 304, and the other end of the fourth control valve 304 is connected with the other end of the first control valve and one end of the second control valve 206 respectively. The superheated steam outlet of the steam generator 302 is connected with the inlet of the steam turbine intermediate pressure cylinder 2022 through a fifth control valve 305; specifically, the superheated steam outlet of the steam generator 302 is connected to one end of the fifth control valve 305, and the other end of the fifth control valve 305 is connected to the inlet of the turbine intermediate pressure cylinder 2022. The photo-thermal collector 301 is internally provided with a thermal storage working medium, when the photo-thermal collector 301 is illuminated in the daytime, the photo-thermal collector 301 absorbs the energy generated by the sun and transmits the energy to the thermal storage working medium, the thermal storage working medium is changed into a hot working medium, and the photo-thermal collection group 30 is used for conveying the thermal storage working medium from the photo-thermal collector 301 to the steam generator 302 and then from the steam generator 302 to the photo-thermal collector 301 to realize the storage and conveying circulation of the hot and cold working medium of the thermal storage working medium; the photothermal heat collector 301 delivers hot working medium to the steam generator 302, the steam generator 302 heats the feed water delivered by the feed water pump 2041 through the hot working medium to the steam pressure and temperature which are the same as those of the steam at the steam outlet of the steam turbine high-pressure cylinder 2021 or the steam at the inlet of the steam turbine intermediate-pressure cylinder 2022, so as to realize the power generation and heat supply of the photothermal heat collection unit and the transmission and conversion of the heat generated by the photothermal heat collection to the thermoelectric generator unit, when the steam generated by the photothermal heat collection group is used for generating power, on one hand, the steam generator can heat and adjust steam parameters to be the same as the pressure and temperature of the inlet of the medium-pressure cylinder of the steam turbine, on the other hand, the steam generator can also heat and adjust steam parameters to be the same as the pressure and temperature of the outlet of the high-pressure cylinder, in this case, the steam flow may be limited because of the need for steam to enter the boiler reheater. In the present invention, the feed water pump 2041 includes a feed water pump body tap, and the inlet of the steam generator 302 is connected to the feed water pump body tap through a third control valve 303.
As shown in fig. 1, the photothermal heat collection assembly 30 further includes at least one hot working medium storage station 306 connected to inlets of the photothermal heat collector 301 and the steam generator 302, at least one sixth control valve 307 connected to an outlet of the steam generator 302, at least one cold working medium storage station 308 connected to the at least one sixth control valve 307, at least one working medium delivery pump 309 connected to the at least one cold working medium storage station 308, and at least one seventh control valve 310 connected to the at least one working medium delivery pump 309 and the photothermal heat collector 301. When there is illumination in the daytime, the photo-thermal collector 301 absorbs energy generated by the sun and transmits the energy to the heat storage working medium, and the heat storage working medium becomes a hot working medium.
When the sun shines, the light and heat collector absorbs the energy that the sun produced to give the heat storage working medium of light and heat collector with this energy transmission, the heat storage working medium becomes hot working medium and enters into hot working medium storage station, then also enters into steam generator, give the water feed pump with heat transfer in steam generator and supply water, heat this to supply water to with the superheated steam of steam turbine intermediate pressure cylinder entry the same temperature and pressure, superheated steam enters into the steam turbine intermediate pressure cylinder and drives the rotary machine rotor and do work, thereby drive the generator electricity generation. Wherein the control of the energy exchange in the steam generator is effected by the sixth control valve regulating the flow of the medium in the hot working medium storage station and the cold working medium storage station.
When the thermal power generating unit needs to supply heat, the conventional thermal power generating unit heat supply method is that steam is exhausted by a high-pressure cylinder of a steam turbine and enters a temperature and pressure reduction device for supplying heat, when sunlight heat is sufficient, a thermal working medium enters a steam generator, heat is transferred to feed water at a tap outlet of a feed pump body of the thermal power generating unit in the steam generator, the feed water is heated to superheated steam with the same temperature and pressure as a steam outlet of a high-pressure cylinder of the steam turbine, and the superheated steam enters the temperature and pressure reduction device through a second control valve, so that the heat supply of a photothermal system is realized.
In the invention, the photo-thermal heat collector 301 absorbs the energy generated by the sun and transmits the energy to the heat storage working medium, wherein the temperature of the hot working medium of the heat storage working medium is more than 350 ℃; the feed water tapped from the feed water pump body is heated to superheated steam which is matched with the temperature and pressure of steam at the inlet of a medium pressure cylinder of the steam turbine, the temperature of a general subcritical reheating unit is 535 ℃, the pressure is 3-4MPa, and the pressure is adjustedThe third control valve is used for realizing the adjustment of the temperature, and the sixth control valve is used for realizing the adjustment of the temperature. Particularly, the mirror field of the photo-thermal collector occupies about 2-3km2The condensing area is about 80 ten thousand square meters, the heat storage can be 6-10 hours, the absorbed solar energy is transmitted to the working medium, the working medium heats the water supply of about 200t/h to the superheated steam with the temperature of 535 ℃ and the pressure of 2-4MPa, about 60MW of electric quantity can be generated on the thermal power generating unit, about 200MW of heat supply capacity is realized, and the heat supply capacity is reduced to more than 300 ten thousand GJ/year.
Furthermore, the proportion of the first control valve and the second control valve of the adjusting valve is controlled, so that conversion between power generation load and heat supply load of the thermal power generating unit and the photo-thermal heat collection unit can be realized.
In the invention, the photo-thermal collector adopts a groove type photo-thermal collector; or the photo-thermal collector adopts a tower-type photo-thermal collector. The heat storage working medium is heat storage oil; or the heat storage working medium is molten salt.
Further, in the present invention, the first control valve, the second control valve, the third control valve, the fourth control valve, the fifth control valve, the sixth control valve, and the seventh control valve are all regulating valves. Of course, the first control valve, the second control valve, the third control valve, the fourth control valve, the fifth control valve, the sixth control valve, and the seventh control valve may also be stop valves, or may also be other control valves, which is not limited in the embodiment of the present invention.
In the reheating thermal power generating unit and photo-thermal combined power generation and steam supply system, when the electric load needs to be increased, steam generated by thermal power and steam generated by photo-thermal heat simultaneously enter the intermediate pressure cylinder to do work for power generation by adjusting the fifth control valve at the inlet of the intermediate pressure cylinder of the steam turbine and the sixth control valve of the photo-thermal heat collection unit; when the heat load needs to be increased, the simultaneous heat supply or the independent heat supply of thermal power and light heat is realized through the second control valve at the inlet of the temperature and pressure reducer. In the dynamic adjustment process, the thermal power can be increased or reduced by adjusting the thermal power and the thermal power supply distribution, and the generated energy is reduced while the heat supply is increased.
According to the reheating thermal power generating unit and photo-thermal combined power generation and steam supply system, the temperature-reducing and pressure-reducing steam supply device, the thermal power generating unit and the photo-thermal heat collection unit are arranged, so that the energy generated by the photo-thermal heat collection unit can be converted into electric energy and heat supply heat energy by utilizing the conventional thermal power generation equipment, the heat energy generated by the photo-thermal heat collection unit is transmitted to the thermal power generation, the thermal power generation equipment is not required to be built by photo-thermal investment, the power generation and heat supply of the photo-thermal equipment are realized, the investment cost of the photo-thermal power generation is effectively reduced, and the problem of instability of new energy power generation is solved; the thermal power generating unit and the photo-thermal heat collection unit can generate electricity and supply heat complementarily, and meanwhile peak regulation and thermoelectric decoupling of the thermal power generating unit can be achieved to a certain degree.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and any simple modification, equivalent change and modification made to the above embodiment according to the technical spirit of the present invention are still within the scope of the technical solution of the present invention.
Claims (9)
1. The utility model provides a reheat thermal power generating unit and light and heat cogeneration and steam supply system which characterized in that: it includes:
a temperature and pressure reducing steam supply device;
the thermal power generating unit comprises a boiler, a steam turbine connected with the boiler, a condensation unit connected with the steam turbine, and heater units respectively connected with the steam turbine and the condensation unit; the steam turbine comprises a steam turbine high-pressure cylinder and a steam turbine intermediate-pressure cylinder which are both connected with the boiler, and the steam turbine high-pressure cylinder is connected with the temperature and pressure reducing steam supply device through a first control valve and a second control valve; when the thermal power generating unit normally operates, steam generated by the boiler enters a high-pressure cylinder of a steam turbine to do work, wherein one path of the steam returns to the boiler to reheat and absorb heat, the reheated steam after absorbing heat enters the steam turbine to do work to become condensed water, then enters the boiler to absorb heat to become new steam again after passing through a condensation unit and a heater unit, and the other path of the steam enters a temperature-reducing and pressure-reducing steam supply device to supply heat to the outside, so that power generation and heat supply of a conventional thermal power plant are realized; the heater unit includes a feed pump;
the photo-thermal heat collection group comprises a photo-thermal heat collector and a steam generator; the inlet of the steam generator is connected with the feed pump through a third control valve, the outlet of the steam generator is connected with the steam outlet of the high-pressure cylinder of the steam turbine through a fourth control valve and a first control valve, the outlet of the steam generator is connected with the temperature and pressure reducing steam supply device through a fourth control valve and a second control valve, and the superheated steam outlet of the steam generator is connected with the inlet of the medium-pressure cylinder of the steam turbine through a fifth control valve; the photo-thermal collector is internally provided with a heat storage working medium, and the photo-thermal collection group is used for conveying the heat storage working medium from the photo-thermal collector to the steam generator and then from the steam generator to the photo-thermal collector to realize the storage and conveying circulation of the hot and cold working medium of the heat storage working medium;
the photo-thermal collector conveys hot working medium to the steam generator, the steam generator heats the feed water conveyed by the feed water pump to the steam pressure and the temperature which are the same as the steam of the steam outlet of the high-pressure cylinder of the steam turbine or the steam inlet of the medium-pressure cylinder of the steam turbine through the hot working medium, the power generation, the heat supply and the steam supply of the photo-thermal collector group are realized, and the simultaneous heat supply or the independent heat supply of the thermal power generating unit and the photo-thermal collector group are realized through the first control valve, the second control valve, the third control valve, the fourth control valve and the fifth control valve.
2. The reheat thermal power unit and photo-thermal combined power and steam supply system as claimed in claim 1,
the steam turbine still includes the steam turbine low pressure jar, the superheated steam of boiler export with steam turbine high pressure jar entry linkage, the reheater entry of boiler with steam turbine high pressure jar steam exhaust mouth is connected, the boiler reheater export with steam turbine intermediate pressure jar is connected, steam turbine intermediate pressure jar export with steam turbine low pressure jar entry linkage, steam turbine low pressure jar with the unit connection that condenses.
3. The reheat thermal power generating unit and photo-thermal combined power and steam supply system as set forth in claim 2,
the condensing unit comprises a condenser connected with the low-pressure cylinder of the steam turbine and a condensate pump connected with the condenser;
the heater unit also comprises a low-pressure heater connected with the condensate pump, a deaerator and a high-pressure heater group which are respectively connected with the low-pressure heater and the water feeding pump; one end of the high-pressure heater group is connected with the feed pump, and the other end of the high-pressure heater group is connected with the boiler inlet; the high-pressure heater group comprises three high-pressure heaters which are connected in series, the steam extraction of the high-pressure cylinder of the steam turbine is respectively connected with the two high-pressure heaters, the steam extraction of the medium-pressure cylinder of the steam turbine is respectively connected with one high-pressure heater and the deaerator, and the steam extraction of the low-pressure cylinder of the steam turbine is connected with the low-pressure heater.
4. The reheat thermal power unit and photo-thermal combined power and steam supply system as claimed in claim 1,
the photo-thermal heat collection set further comprises at least one hot working medium storage station, at least one sixth control valve, at least one cold working medium storage station, at least one working medium delivery pump and at least one seventh control valve, wherein the at least one hot working medium storage station is connected with the photo-thermal heat collector and the steam generator inlet respectively, the at least one sixth control valve is connected with the steam generator outlet, the at least one cold working medium storage station is connected with the at least one sixth control valve, the at least one working medium delivery pump is connected with the at least one cold working medium storage station, and the at least one seventh control valve is connected with the at least one working medium delivery pump and the photo-thermal heat collector respectively.
5. The reheat thermal power unit and photo-thermal combined power and steam supply system as claimed in claim 1,
the photo-thermal collector adopts a groove type photo-thermal collector; or,
the photo-thermal collector adopts a tower-type photo-thermal collector.
6. The reheat thermal power unit and photo-thermal combined power and steam supply system as claimed in claim 1,
the heat storage working medium is heat storage oil; or,
the heat storage working medium is molten salt.
7. The reheat thermal power unit and photo-thermal combined power and steam supply system as claimed in claim 6,
the temperature of the hot working medium of the heat storage working medium is more than 350 ℃.
8. The reheat thermal power unit and photo-thermal combined power and steam supply system as claimed in claim 1,
the first control valve, the second control valve, the third control valve, the fourth control valve and the fifth control valve are all regulating valves.
9. The reheat thermal power unit and photo-thermal combined power and steam supply system as claimed in claim 4,
and the six control valves and the seventh control valve are regulating valves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202210262889.5A CN114753897A (en) | 2022-03-17 | 2022-03-17 | Reheating thermal power generating unit and photo-thermal combined power generation and steam supply system |
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| CN202210262889.5A CN114753897A (en) | 2022-03-17 | 2022-03-17 | Reheating thermal power generating unit and photo-thermal combined power generation and steam supply system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024037027A1 (en) * | 2022-08-17 | 2024-02-22 | 西安热工研究院有限公司 | Solar-coal hybrid steam turbine system based on cascade utilization of energy, and power generation system |
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2022
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024037027A1 (en) * | 2022-08-17 | 2024-02-22 | 西安热工研究院有限公司 | Solar-coal hybrid steam turbine system based on cascade utilization of energy, and power generation system |
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