CN113250769B - Combustible gas power supply device for user side and peak shaving method and application thereof - Google Patents
Combustible gas power supply device for user side and peak shaving method and application thereof Download PDFInfo
- Publication number
- CN113250769B CN113250769B CN202110682700.3A CN202110682700A CN113250769B CN 113250769 B CN113250769 B CN 113250769B CN 202110682700 A CN202110682700 A CN 202110682700A CN 113250769 B CN113250769 B CN 113250769B
- Authority
- CN
- China
- Prior art keywords
- heat
- combustible gas
- power supply
- storage system
- heat storage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
-
- 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
-
- 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
-
- 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
- F01K3/00—Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein
-
- 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
- F01K3/00—Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein
- F01K3/18—Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein having heaters
-
- 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
- F01K7/00—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating
- F01K7/34—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being of extraction or non-condensing type; Use of steam for feed-water heating
- F01K7/38—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being of extraction or non-condensing type; Use of steam for feed-water heating the engines being of turbine type
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The invention discloses a combustible gas power supply device for a user side, a peak shaving method and application thereof, the combustible gas power supply device for the user side comprises a combustible gas power supply system for the user side, the combustible gas power supply system comprises a deaerator, a condenser, a steam turbine and a boiler, the steam turbine is connected with a generator, the combustible gas power supply system also comprises a power supply peak shaving device externally connected to the combustible gas power supply system, and the power supply peak shaving device comprises: a burner having an inlet for the introduction of combustible gas; the first heat storage system is communicated with the combustion furnace and forms a heat exchange loop; and the first heat exchange system is communicated with the first heat storage system to form a heat exchange loop, a water inlet of the first heat exchange system is communicated to a water outlet of the deaerator, and a gas outlet of the first heat exchange system is communicated to a gas inlet of the steam turbine. The technical problem that the requirements of a user side cannot be directly met when peak shaving is realized by adopting a mode of extracting main steam to store heat in the prior art is solved.
Description
Technical Field
The invention belongs to the technical field of power supply devices, and particularly relates to a combustible gas power supply device for a user side, and a peak shaving method and application thereof.
Background
With the rapid increase of the proportion of new energy such as wind energy, solar energy and the like in a power grid in China and the realization of the carbon neutralization target, higher requirements are put forward on the power generation proportion and the consumption of the new energy, and the power grid peak regulation contradiction is increasingly prominent. In order to promote the production and consumption of clean energy and improve the scheduling flexibility of a power grid, the traditional 'source load following' scheduling is accelerating to change to 'source grid load storage' scheduling. Therefore, the huge potential of power utilization enterprises for participating in peak shaving needs to be explored, source grid load collaborative optimization and demand response precision are realized, and the power utilization cost of the enterprises is reduced.
At present, peak regulation is usually realized by a mode of extracting main steam heat storage of a power generation system, and because heat loss exists in the storage process of steam, when the load of a steam turbine needs to be increased, the steam which is directly generated by using the heat and has the same parameters with the main steam can not be used for power generation, and heat supply needs to be additionally increased, so the peak regulation mode is usually applied to a demand scene of reducing the load of the steam turbine. When the peak load of the user side is regulated, the system is required to reduce the load of the steam turbine and increase the load of the steam turbine according to the peak load regulation requirement, and the mode of extracting the main steam of the power generation system for storing heat to realize the peak load regulation can not directly meet the requirement of the user side.
Disclosure of Invention
The invention aims to provide a combustible gas power supply device for a user side, a peak shaving method and application thereof, and aims to solve the technical problem that the requirements of the user side cannot be directly met when the peak shaving is realized by adopting a mode of extracting main steam for heat storage in the prior art.
The invention adopts the following technical scheme: a combustible gas power supply unit for user side, including the combustible gas power supply system who is used for user side, combustible gas power supply system includes oxygen-eliminating device, condenser, steam turbine and boiler, and the steam turbine is connected with the generator, still includes the power supply peak regulation device that connects to combustible gas power supply system outward, and the power supply peak regulation device includes:
a burner having an inlet for the introduction of combustible gas;
the first heat storage system is communicated with the combustion furnace and forms a heat exchange loop;
the first heat exchange system is communicated with the first heat storage system to form a heat exchange loop, a water inlet of the first heat exchange system is communicated to a water outlet of the deaerator, and a gas outlet of the first heat exchange system is communicated to a gas inlet of the steam turbine;
the combustion furnace is used for introducing combustible gas, combusting the combustible gas and storing heat generated by combustion in the first heat storage system; the first heat exchange system is used for extracting the deoxygenated water with the corresponding amount from the deaerator according to peak regulation requirements, heating the deoxygenated water by using the heat with the corresponding amount in the first heat storage system, converting the deoxygenated water into water vapor meeting the power generation standard, and then conveying the water vapor to the steam turbine for power generation.
Further, the gas outlet pipeline intercommunication of steam turbine is equipped with the condenser, and the export intercommunication of condenser is equipped with cooling water output pipeline, and power supply peak regulation device still includes:
the inlet of the second heat storage system is communicated to the smoke outlet of the combustion furnace and is used for storing the heat of the high-temperature smoke discharged by the combustion furnace;
the second heat exchanger is arranged on the cooling water output pipeline, and the outlet of the cooling water output pipeline is communicated to the deaerator; the second heat exchanger is communicated with the second heat storage system to form a heat exchange loop; and the second heat exchanger is used for heating the cooling water output from the condenser by using the heat in the second heat storage system and conveying the cooling water to the deaerator.
Furthermore, the power supply peak regulation device also comprises a third heat exchanger which is arranged in a flue of the combustion furnace, is communicated with the second heat storage system and forms a heat exchange loop; and the third heat exchanger is used for exchanging heat between the heat exchange medium in the third heat exchanger and the high-temperature flue gas in the flue of the combustion furnace, and then conveying the heated heat exchange medium to the second heat storage system so as to charge the second heat storage system.
Further, the first heat exchange system comprises a superheater, an evaporator and a preheater which are sequentially communicated, an inlet of the preheater is communicated to the deaerator, and an outlet of the superheater is communicated to the steam turbine.
Furthermore, the first heat storage system comprises a high-temperature molten salt tank and a low-temperature molten salt tank, the inlet of the high-temperature molten salt tank is communicated with the combustion furnace, and the outlet of the low-temperature molten salt tank is communicated with the combustion furnace.
The second technical scheme adopted by the invention is that the peak shaving method for the combustible gas power supply device on the user side uses the combustible gas power supply device on the user side, and comprises the following contents:
according to the heat storage capacity of the first heat storage system, combustible gas is introduced into the combustion furnace and combusted, and then heat generated by combustion is stored in the first heat storage system;
according to the peak regulation demand, the first heat exchange system extracts the deoxygenated water with the corresponding amount from the deaerator, and the heat with the corresponding amount in the first heat storage system is used for heating the deoxygenated water, so that the deoxygenated water is conveyed to the steam turbine for subsequent power generation after being converted into water vapor meeting the power generation standard.
Further, the following contents are included:
the second heat storage system stores the heat of the high-temperature flue gas of the combustion furnace;
and the heat in the second heat storage system is taken out through the second heat exchanger, and is used for heating cooling water generated by a condenser in the combustible gas power supply system and then is sent to the deaerator.
Further, the following contents are included: and the heat of the flue gas discharged by the combustion furnace is exchanged to the second heat storage system through the third heat exchanger.
The third technical scheme adopted by the invention is that the combustible gas power supply device for the user side is used, when the electricity price of the user is at the valley time, the electricity using the outsourcing power grid is increased, the heat generated by the combustion of the combustible gas is stored in the first heat storage system, and the generated energy of the combustible gas power supply system is reduced; and the electricity using an outsourcing power grid is reduced during peak electricity price, and the generated energy of a combustible gas power supply system is increased.
Furthermore, when a user participates in promotion of consumption of renewable energy sources, the heat generated by combustion of the combustible gas is stored in the first heat storage system, power generation of the combustible gas is reduced, and the amount of electricity used by a purchased power grid is increased for the user.
The invention has the beneficial effects that: according to the combustible gas power supply device on the user side, the combustible gas is combusted to generate heat, the heat is stored in the first heat storage system, the deaerated water is heated by using the heat in a corresponding quantity according to peak regulation requirements, and steam with the parameter consistent with that of the combustible gas power supply system on the user side is directly generated to supply power in a required time period, so that the load of a steam turbine is increased or reduced according to requirements. Meanwhile, the smoke generated by the combustible gas power supply device at the user side can be discharged through a chimney of the combustible gas power supply system, and heat storage and peak shaving can be carried out under the condition that the running performance of the existing combustible gas power supply system is not influenced.
Drawings
FIG. 1 is a schematic structural view of a combustible gas power supply device for a user side according to the present invention;
FIG. 2 is a schematic view of the system configuration of embodiment 1;
fig. 3 is a schematic system configuration diagram of embodiment 2.
The system comprises a combustion furnace 1, a first heat storage system 21, a second heat storage system 22, a high-temperature molten salt tank 211, a low-temperature molten salt tank 212, a first heat exchange system 31, a second heat exchanger 32, a third heat exchanger 33, a superheater 311, an evaporator 312, a preheater 313, a low-temperature pump 4, a high-temperature pump 5, a deaerator 6, a condenser 7, a steam turbine 8, a chimney 9 and a boiler 10.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
The invention provides a combustible gas power supply device for a user side, a peak shaving method and application thereof, as shown in figure 1, the power supply peak shaving device is externally connected to a combustible gas power supply system, the combustible gas power supply system generally comprises a deaerator 6, a condenser 7, a steam turbine 8 and a boiler 10, and the steam turbine 8 is connected with a generator; the combustible gas power supply system uses a boiler 10 to burn combustible gas, and the generated heat is supplied to a steam turbine 8 and then generated by a generator.
This power supply peak regulation device includes: the system comprises a combustion furnace 1, a first heat storage system 21 and a first heat exchange system 31. Wherein, the entrance of the combustion furnace 1 is used for introducing combustible gas and combusting the combustible gas, and the combustible gas is homologous with the combustible gas used in the combustible gas power supply system. The combustible gas can be natural gas, coal gas or other combustible waste gas.
The first heat storage system 21 is communicated with the combustion furnace 1 and forms a heat exchange loop, and the first heat storage system 21 is used for storing heat generated in the combustion furnace 1. The first heat storage system 21 may be a sensible heat storage system, a latent heat storage system, a chemical heat storage system. The first heat exchange system 31 may adopt heat exchangers of different heat exchange media and water according to the difference of the heat transfer and storage media of the first heat storage system 21.
The first heat exchange system 31 is communicated with the first heat storage system 21 to form a heat exchange loop, a water inlet of the heat exchange loop is communicated to a water outlet of the deaerator 6, and a gas outlet of the heat exchange loop is communicated to a gas inlet of the steam turbine 8.
The first heat exchange system 31 is configured to heat the deoxygenated water output by the deoxygenator 6 by using the heat in the first heat storage system 21, and to change the deoxygenated water into steam and then deliver the steam to the steam turbine 8 for power generation. Specifically, the first heat exchange system 31 receives the high-temperature heat exchange medium output from the first heat storage system 21, and after heat exchange is completed in the first heat exchange system 31, returns the low-temperature heat exchange medium after heat exchange to the first heat storage system 21; first heat exchange system 31 still is used for receiving the deoxidization water of deriving through oxygen-eliminating device 6 to accomplish the heat transfer in first heat exchange system 31 and generate steam, carry steam to steam turbine 8 again and generate electricity. The steam parameters input into the turbine 8 meet the power supply requirements of the combustible gas power supply system.
Specifically, the first heat storage system 21 may be communicated to the combustion furnace 1 through the low-temperature pump 4, when the first heat storage system 21 stores heat, the combustion furnace 1 heats a low-temperature heat exchange medium by combustion heat of the combustible gas, the low-temperature heat exchange medium becomes a high-temperature heat exchange medium after being heated, and the high-temperature heat exchange medium exchanges heat with the heat storage medium in the first heat storage system 21 and stores heat by the heat storage medium. When the first heat storage system 21 releases heat, a low-temperature heat exchange medium in the first heat exchange system 31 is changed into a high-temperature heat exchange medium through the first heat storage system 21, the high-temperature heat exchange medium enters the first heat exchange system 31 again to exchange heat with part of deoxygenated water extracted from a water supply system of the combustible gas power supply system, steam with parameters consistent with those of the combustible gas power supply system is generated, and the steam is sent back to the combustible gas power supply system to generate power; the high-temperature heat exchange medium after heat exchange by the first heat exchange system 31 becomes a low-temperature heat exchange medium, and returns to the first heat storage system 21 again for heat exchange.
The combustion furnace 1 is used for introducing combustible gas, combusting the combustible gas and storing heat generated by the combustion in the first heat storage system 21. First heat transfer system 31 is arranged in according to the peak shaving demand, extracts the deoxidization water of corresponding quantity from oxygen-eliminating device 6 to use the heat of corresponding quantity to heat deoxidization water in the first heat-retaining system 21, and make deoxidization water convert the steam that accords with the standard of generating electricity after, carry to steam turbine 8, in order to realize the peak shaving to the combustible gas power supply system generated energy. The water supply amount of the combustible gas power supply system can be supplemented according to the peak regulation requirement. The heat required by user side peak regulation is stored in the first heat storage system 21, the water quantity of the deoxygenated water introduced into the first heat exchange system 31 is controlled according to the peak regulation requirement, the heat released by the first heat storage system 21 is controlled in a matched manner, and the deoxygenated water introduced is heated through the released heat to generate steam and is conveyed to the steam turbine 8. The amount of steam supply can be adjusted by controlling the amount of oxygen-removed water introduced and the amount of heat released from the first heat storage system 21, thereby achieving peak shaving.
In some embodiments, the outlet pipeline of the steam turbine 8 is communicated with a condenser 7, the outlet of the condenser 7 is communicated with a cooling water output pipeline, and the power supply peak shaving device further comprises a second heat storage system 22 and a second heat exchanger 32. The inlet of the second heat storage system 22 is communicated to the smoke outlet of the combustion furnace 1, and the second heat storage system 22 is used for storing the heat of the high-temperature smoke discharged from the combustion furnace 1, so that the smoke discharge temperature can be reduced to be consistent with the smoke discharge temperature of the combustible gas power supply system, and the smoke discharge temperature is discharged through a chimney 9 of the combustible gas power supply system. The second heat storage system 22 may be a sensible heat storage system, a latent heat storage system, a chemical heat storage system; the second heat exchanger 32 can adopt heat exchangers of different heat exchange media or water according to different heat transfer media of the second heat storage system 22.
The second heat exchanger 32 is arranged on a cooling water output pipeline, and an outlet of the cooling water output pipeline is communicated to the deaerator 6. The second heat exchanger 32 is communicated with the second heat storage system 22 to form a heat exchange loop, the inlet of the second heat exchanger 32 is communicated with a condenser 7 in the combustible gas power supply system, and the outlet of the second heat exchanger is communicated to the deaerator 6; a second heat exchanger 32 for heating the cooling water output from the condenser 7 using the heat in the second heat storage system 22 and delivering the cooling water to the oxygen remover 6.
The second heat storage system 22 and the second heat exchanger 32 are arranged to reuse heat of flue gas discharged from the combustion furnace 1, store the heat of the flue gas into the second heat storage system 22, and reuse the heat to heat cooling water discharged from the condenser 7.
In some embodiments, as shown in fig. 3, the peak shaving device further includes a third heat exchanger 33, the third heat exchanger 33 is disposed in the smoke evacuation channel of the combustion furnace 1, and is communicated with the second heat storage system 22 and forms a heat exchange loop; the third heat exchanger 33 is configured to exchange heat between the heat exchange medium inside the third heat exchanger and the high-temperature flue gas in the flue of the combustion furnace 1, and then convey the heated heat exchange medium to the second heat storage system 22 to heat the second heat storage system 22. The heat exchange medium can be air, heat conducting oil, water or molten salt and the like.
The heat exchange medium is heated by the smoke exhaust through the third heat exchanger 33 to heat the second heat storage system 22, so that the smoke exhaust is cooled to be consistent with the smoke exhaust temperature of the combustible gas power supply system and then returns to the chimney 9 to be discharged. If the high-temperature flue gas after the combustion of the combustible gas contains dust or other chemical components, the high-temperature flue gas cannot directly enter the second heat storage system 22 for heat charging, but exchanges heat through the third heat exchanger 33 and then charges heat into the second heat storage system 22. In this way, the influence of substances in the high-temperature flue gas on the performance of the heat storage body of the second heat storage system 22 can be avoided.
In some embodiments, as shown in fig. 2, the first heat exchange system 31 includes a superheater 311, an evaporator 312, and a preheater 313 arranged in series, an inlet of the preheater 313 is connected to the deaerator 6, and an outlet of the superheater 311 is connected to the steam turbine 8.
In some embodiments, as shown in fig. 2, the first heat storage system 21 includes a high-temperature molten salt tank 211 and a low-temperature molten salt tank 212, an inlet of the high-temperature molten salt tank 211 is communicated with the combustion furnace 1, and an outlet of the low-temperature molten salt tank 212 is communicated with the combustion furnace 1.
In some embodiments, the exhaust of the second heat storage system 22 is connected to the stack 9 of the combustible gas power supply system. The second heat storage system 22 can adjust the temperature of the exhaust gas of the combustion furnace 1 to be consistent with the temperature of the exhaust gas of the combustible gas power supply system, and can send the exhaust gas back to the exhaust gas channel connected with the boiler of the combustible gas power supply system.
The combustible gas power supply system can comprise a boiler 10, a water inlet of the boiler 10 is communicated with a water outlet pipeline of the deaerator 6, a water vapor outlet of the boiler 10 is communicated to a gas inlet of the steam turbine 8, and a smoke exhaust channel of the boiler 10 is connected to a chimney 9.
The invention discloses a peak regulation method for a combustible gas power supply device at a user side, which comprises the following steps:
according to the heat storage capacity of the first heat storage system 21, a corresponding amount of combustible gas is introduced into the combustion furnace 1 and heated, and then the heat is stored in the first heat storage system 21. Specifically, when the first heat storage system 21 stores heat, combustible gas is introduced into the combustion furnace 1 for combustion, the combustion furnace 1 heats the low-temperature heat exchange medium sent by the low-temperature pump 4 by using heat generated by combustion, the low-temperature heat exchange medium becomes a high-temperature heat exchange medium after being heated, and the high-temperature heat exchange medium exchanges heat with the heat storage medium in the first heat storage system 21 and stores heat by using the heat storage medium.
According to the peak regulation demand, first heat transfer system 31 shunts the oxygen-removed water to the application volume from oxygen-eliminating device 6 to use the heat of corresponding quantity to heat the oxygen-removed water in first heat-retaining system 21, make the oxygen-removed water change into the steam that accords with the power generation standard after, carry to steam turbine 8 and carry out follow-up electricity generation. Specifically, when the first heat storage system 21 releases heat, the high-temperature pump 5 conveys the high-temperature heat exchange medium to the first heat exchange system 31, and performs heat exchange between the high-temperature heat exchange medium and the deaerated water in the first heat exchange system 31, and the released high-temperature heat exchange medium becomes the low-temperature heat exchange medium and then enters the first heat storage system 21 to perform heat exchange and temperature rise for the next time. The power supply peak regulation device supplies water by utilizing the deaerated water of the combustible gas power supply system, partial deaerated water can be extracted according to the peak regulation demand water consumption, the deaerated water and the heat exchange medium are subjected to heat exchange through the first heat exchange system 31, then the deaerated water is changed into steam with parameters consistent with steam parameters of the combustible gas power supply system, and the steam returns to the steam turbine 8 of the combustible gas power supply system and generates power together with the steam of the combustible gas power supply system.
In some embodiments, the peak shaving method further comprises the following:
the second heat storage system 22 collects the heat of the high-temperature flue gas of the combustion furnace 1; the heat in the second heat storage system 22 is taken out through the second heat exchanger 32, and is used for heating cooling water generated by a condenser 7 in the combustible gas power supply system, and then the cooling water is sent to the deaerator 6. Specifically, the second heat storage system 22 is charged with high-temperature flue gas in the flue of the combustion furnace 1; the heat in the second heat storage system 22 enters the second heat exchanger 32 through the heat exchange medium to exchange heat, and the heat is used for heating the cooling water discharged by the condenser 7. After the high-temperature flue gas heat exchange of the combustion furnace 1 is reduced to be the same as the flue gas temperature of the combustible gas power supply system, the high-temperature flue gas is sent back to the flue of the combustible gas power supply system.
In some embodiments, the peak shaving method further comprises the following: the heat of the flue gas discharged from the combustion furnace 1 is exchanged to the second heat storage system 22 by the third heat exchanger 33. Heat is charged into the second heat storage system 22 after heat exchange is performed by the third heat exchanger 33, so that the influence of substances in the high-temperature flue gas on the heat storage performance of the second heat storage system 22 can be avoided.
The invention is used for the combustible gas power supply device at the user side and has the following application: the combustible gas power supply device for the user side further comprises a generator, and the user can select the electric quantity supplied by the combustible gas power supply system according to peak regulation requirements.
The peak-to-peak power generation system is used for power generation peak shaving under the condition of time-of-use electricity price, and the economic benefit of a user is improved through peak-to-valley electricity price difference. The electricity using the outsourcing power grid is increased when the electricity price of the user is at the valley time, and the generated energy of the combustible gas power supply system is reduced; and the electricity using an outsourcing power grid is reduced during peak electricity price, and the generated energy of a combustible gas power supply system is increased. By utilizing the device, the heat generated by combustion of the combustible gas can be stored at the electricity price at the valley time, so that the generated energy of a combustible gas power supply system is reduced; the stored heat is used for supplying power during peak electricity price, the generated energy of a combustible gas power supply system is increased, the electric quantity of a high-price outsourcing power grid is reduced, and the production cost of a user is reduced through peak-valley price difference.
In some embodiments, the method is used for promoting the consumption of renewable energy by a user, and when new energy such as photovoltaic and wind power is generated greatly, the user is required to increase the electric quantity of an outsourcing power grid, so that more internet access space is provided for the new energy. When the device provided by the invention is used, when a user participates in promotion of the consumption of the renewable energy, the heat generated by combustion of the combustible gas is stored, the power generation of the combustible gas is reduced, the use amount of the electric quantity of an outsourcing power grid is increased for the user, the consumption of the renewable energy is effectively promoted, and meanwhile, the economic benefit generated by promotion of the consumption of the renewable energy is increased.
In some embodiments, the system is also used for providing power to maintain normal production of the user when the user participates in demand side response or enforces ordered power utilization. When the electricity consumption of the outsourcing power grid is reduced, the device can utilize the stored heat to generate electricity when the electricity consumption of the outsourcing power grid is reduced, the generated energy of a combustible gas power supply system is increased, the normal production of a user is ensured, the influence on the production when the electricity consumption of the outsourcing power grid is reduced, and the economic loss of the user is reduced.
Example 1
As shown in fig. 2, the combustible gas power supply device for the user side of the invention can provide heat storage and peak shaving for blast furnace gas power generation of a steel mill, the combustion furnace 1 adopts a molten salt furnace, the combustible gas used by the combustion furnace 1 adopts blast furnace gas, the high-temperature pump 5 adopts a high-temperature molten salt pump, the low-temperature pump 4 adopts a low-temperature molten salt pump, the first heat storage system 21 comprises a high-temperature molten salt tank 211 and a low-temperature molten salt tank 212, the second heat storage system 22 adopts a flue gas solid heat storage body, the first heat exchange system 31 comprises a superheater 311, an evaporator 312 and a preheater 313, the first heat exchange system 31 adopts a brine heat exchanger, and the second heat exchanger 32 adopts a steam-water heat exchanger.
When the first heat storage system 21 stores heat, part of the blast furnace gas enters the molten salt furnace to be combusted, the low-temperature molten salt conveyed from the low-temperature molten salt tank 212 is heated, and the heated high-temperature molten salt is conveyed to the high-temperature molten salt tank 211 to be stored; when heat is released, the high-temperature molten salt sequentially passes through the superheater 311, the evaporator 312 and the preheater 313 and exchanges heat with the deaerated water, and the molten salt after heat exchange is changed into low-temperature molten salt and then returns to the low-temperature molten salt tank 212 so as to heat the first heat storage system 21 for the next time.
The water supply of the power supply peak regulation device utilizes the deaerated water extracted from the deaerator 6, and partial deaerated water is taken to enter the superheater 311, the evaporator 312 and the preheater 313 for heat exchange, so that the partial deaerated water is heated to become steam with steam parameters consistent with those of the combustible gas power supply system, and then returns to the steam turbine 8 to generate power together with the steam of the combustible gas power supply system.
The flue of the combustion furnace 1 is communicated with the second heat storage system 22 to form a heat exchange loop, and the exhaust smoke passes through the second heat storage system 22, is heated for the second heat storage system 22, and returns to the chimney 9 for emission after the temperature of the exhaust smoke is reduced to be consistent with that of the combustible gas power supply system.
The second heat exchanger 32 is communicated between the condenser 7 and the deaerator 6, is communicated with the second heat storage system 22 and forms a heat exchange loop; the second heat exchanger 32 is used for receiving the high-temperature gas transmitted by the second heat storage system 22, and heat exchange is performed by using the second heat exchanger 32, so that the water conveyed to the deaerator 6 is heated, the temperature of the condensed water entering the deaerator 6 is increased, and the energy consumption is reduced.
Example 2
As shown in fig. 3, in the combustible gas power supply device for the user side of the present invention, a combustion boiler is used as a combustion furnace 1, a high-temperature air pump is used as a high-temperature pump 5, a low-temperature air pump is used as a low-temperature pump 4, a high-temperature solid heat storage body using dry air as a heat transfer medium is used as a first heat storage system 21, a high-temperature solid heat storage body using heat transfer oil as a heat transfer medium is used as a second heat storage system 22, a first heat exchange system 31 is composed of a superheater 311, an evaporator 312 and a preheater 313, a steam-water heat exchanger is used as the first heat exchange system 31, an oil-water heat exchanger is used as a second heat exchanger 32, and a heat transfer oil heat exchanger is used as a third heat exchanger 33.
When the first heat storage system 21 stores heat, part of the combustible gas enters the combustion furnace 1 for combustion, and the high temperature generated by combustion charges the first heat storage system 21; when heat is released, after the gas is changed into high-temperature gas through the first heat storage system 21, heat exchange is performed with the deaerated water through the superheater 311, the evaporator 312 and the preheater 313, and the gas after heat exchange returns to the first heat storage system 21 for next heat exchange.
The water supply of the power supply peak regulation device utilizes the deoxygenated water extracted from the deaerator 6 of the combustible gas power supply system, part of the deoxygenated water is taken to enter the superheater 311, the evaporator 312 and the preheater 313 to exchange heat with water, the water is changed into steam with the steam parameters consistent with those of the combustible gas power supply system and then returns to the steam turbine 8, and the steam of the combustible gas power supply system generate power together.
The third heat exchanger 33 is arranged in a flue of the combustion furnace 1, is communicated with the second heat storage system 22 and forms a heat exchange loop; the third heat exchanger 33 is configured to exchange heat between heat conduction oil inside the third heat exchanger and high-temperature flue gas in a flue of the combustion furnace 1, and then convey the heated heat conduction oil to the second heat storage system 22, so that the second heat storage system 22 is charged with heat. The high-temperature flue gas heats the heat conduction oil through the third heat exchanger 33, the heated heat conduction oil is used for heating the second heat storage system 22, after the heat conduction, the temperature of the flue gas can be reduced to be consistent with the temperature of the flue gas discharged by the combustible gas power supply system, and finally the flue gas returns to the chimney 9 for emission. If the high-temperature flue gas after the combustible gas is combusted contains dust or other chemical components, high temperature does not directly enter the heat storage body of the second heat storage system 22 for heat exchange, and the high-temperature flue gas exchanges heat through the third heat exchanger 33, so that the influence of substances in the high-temperature flue gas on the performance of the heat storage body can be avoided.
The second heat exchanger 32 is communicated between the condenser 7 and the deaerator 6, is communicated with the second heat storage system 22 and forms a heat exchange loop; the second heat exchanger 32 is used for receiving the high-temperature heat conduction oil transferred by the second heat storage system 22 so as to heat the deoxygenated water conveyed to the deoxygenator 6.
The combustible gas power supply device for the user side directly heats the heat exchange medium by utilizing the combustion of the combustible gas to transfer and store heat, so that the heat can be stored by utilizing the high temperature of the combustion, and when the heat storage system releases heat, steam with the same parameter as the combustible gas power supply system can be generated and directly returns to the combustible gas power supply system to generate power. Therefore, the combustible gas power supply device for the user side of the invention can reduce or increase the power generation amount according to the peak shaving requirement. The key point of the peak shaving method is that the first heat storage system 21 is utilized to perform the space-time optimization of the generated energy by adjusting the combustion amount of combustible gas. Specifically, the heat storage capacity of the first heat storage system 21 is determined in consideration of various requirements such as peak shaving, economy, policy and the like; according to the heat storage capacity, selecting the combustible gas of the combustible gas power supply system with the corresponding amount to be conveyed to the combustion furnace 1, and storing the heat generated by the combustion furnace 1 to the first heat storage system 21; according to the peak regulation requirement, a certain amount of deoxygenated water is shunted from the deoxygenator to the first heat exchange system 31, and the heat released by the first heat storage system 21 is controlled according to the peak regulation requirement; the heat released in the first heat storage system 21 is taken out through the first heat exchange system 31 and used for heating the deoxygenated water, so that the deoxygenated water is conveyed to the steam turbine 8 for power generation after being heated to reach the power generation standard.
According to the combustible gas power supply device on the user side, the combustible gas is combusted to generate heat, the heat is stored in the first heat storage system, the deaerated water is heated by using the heat in a corresponding quantity according to peak regulation requirements, and steam with the parameter consistent with that of the combustible gas power supply system on the user side is directly generated to supply power in a required time period, so that the load of a steam turbine is increased or reduced according to requirements. Meanwhile, the smoke generated by the combustible gas power supply device at the user side can be discharged through a chimney of the combustible gas power supply system, and heat storage and peak shaving can be carried out under the condition that the running performance of the existing combustible gas power supply system is not influenced.
The invention adopts the combustible gas power supply device for the user side, the supply of heat generated by the combustion of the combustible gas is controlled, and the peak regulation is carried out by adjusting the steam supply quantity, so that the time-space optimization of the generated energy is realized, the combustible gas supply and the generated energy are decoupled, the power supply peak regulation device can generate power according to the peak regulation requirement, and the maximization of the benefit of the user is realized. Through the device, the user can utilize peak-valley price of electricity in time to reduce user's manufacturing cost. Meanwhile, the system can participate in user side peak regulation auxiliary service, when the power grid needs to increase the power load of a user, combustible gas is added for combustion to store heat, and when the power grid needs to reduce the power load, heat release and power generation are carried out. The renewable energy consumption of users is promoted through peak regulation, the influence of power grid dispatching on production is reduced, and an additional part of peak regulation income can be brought.
Claims (9)
1. A combustible gas power supply unit for user side, including the combustible gas power supply system who is used for user side, combustible gas power supply system includes oxygen-eliminating device (6), condenser (7), steam turbine (8) and boiler (10), steam turbine (8) are connected with the generator, and its characterized in that still includes outer the connecing to combustible gas power supply system's power supply peak regulation device, the power supply peak regulation device includes:
a burner (1) having an inlet for the introduction of combustible gas;
a first heat storage system (21) which is communicated with the combustion furnace (1) and forms a heat exchange loop;
the first heat exchange system (31) is communicated with the first heat storage system (21) to form a heat exchange loop, a water inlet of the first heat exchange system is communicated to a water outlet of the deaerator (6), and a gas outlet of the first heat exchange system is communicated to a gas inlet of the steam turbine (8);
the combustion furnace (1) is used for introducing combustible gas, combusting the combustible gas and storing heat generated by combustion in the first heat storage system (21); the first heat exchange system (31) is used for extracting corresponding amount of deoxygenated water from the deoxygenator (6) according to peak regulation requirements, heating the deoxygenated water by using corresponding amount of heat in the first heat storage system (21), converting the deoxygenated water into water vapor meeting power generation standards, and then conveying the water vapor to the steam turbine (8) for power generation;
the gas outlet pipeline intercommunication of steam turbine (8) is equipped with condenser (7), the export intercommunication of condenser (7) is equipped with cooling water output pipeline, power supply peak regulation device still includes:
the inlet of the second heat storage system (22) is communicated to the smoke outlet of the combustion furnace (1) and is used for storing the heat of the high-temperature smoke discharged by the combustion furnace (1);
the second heat exchanger (32) is arranged on the cooling water output pipeline, and the outlet of the cooling water output pipeline is communicated to the deaerator (6); the second heat exchanger (32) is communicated with the second heat storage system (22) and forms a heat exchange loop; the second heat exchanger (32) is used for heating the cooling water output from the condenser (7) by using the heat in the second heat storage system (22) and conveying the cooling water to the deaerator (6).
2. The combustible gas power supply device for the user side according to claim 1, characterized in that the power supply peak shaving device further comprises a third heat exchanger (33), wherein the third heat exchanger (33) is arranged in the flue of the combustion furnace (1), is communicated with the second heat storage system (22) and forms a heat exchange loop; the third heat exchanger (33) is used for exchanging heat between the heat exchange medium inside the third heat exchanger and the high-temperature flue gas in the flue of the combustion furnace (1), and then conveying the heated heat exchange medium to the second heat storage system (22) so as to heat the second heat storage system (22).
3. The combustible gas power supply device for user side according to claim 1 or 2, characterized in that the first heat exchange system (31) comprises a superheater (311), an evaporator (312) and a preheater (313) which are communicated in sequence, wherein an inlet of the preheater (313) is communicated to the deaerator (6), and an outlet of the superheater (311) is communicated to the steam turbine (8).
4. The gas power supply device for the user side according to claim 1 or 2, wherein the first heat storage system (21) includes a high temperature molten salt tank (211) and a low temperature molten salt tank (212), an inlet of the high temperature molten salt tank (211) communicates with the combustion furnace (1), and an outlet of the low temperature molten salt tank (212) communicates with the combustion furnace (1).
5. Method for peak shaving of a gas-powered device on the user side, characterized in that the use of a gas-powered device for user side according to any of claims 1 to 4 comprises the following:
according to the heat storage capacity of the first heat storage system (21), combustible gas is introduced into the combustion furnace (1) and combusted, and then heat generated by combustion is stored in the first heat storage system (21);
according to the peak regulation requirement, the first heat exchange system (31) extracts the deoxygenated water with the corresponding amount from the deaerator (6), and the heat with the corresponding amount in the first heat storage system (21) is used for heating the deoxygenated water, so that the deoxygenated water is converted into water vapor meeting the power generation standard and then is conveyed to the steam turbine (8) for subsequent power generation.
6. The peak shaving method for a combustible gas power unit on the user side according to claim 5, further comprising:
the second heat storage system (22) stores the heat of the high-temperature flue gas of the combustion furnace (1);
and heat in the second heat storage system (22) is taken out through a second heat exchanger (32), and is used for heating cooling water generated by a condenser (7) in the combustible gas power supply system and then is sent to the deaerator (6).
7. The peak shaving method for a combustible gas power unit on the user side according to claim 6, further comprising: the heat of the flue gas discharged from the combustion furnace (1) is exchanged to a second heat storage system (22) through a third heat exchanger (33).
8. Use of a gas-powered device for consumer side, characterized in that, with the gas-powered device for consumer side according to any one of claims 1 to 4, the consumer increases the electricity using the outsourcing grid at the off-peak electricity price, stores the heat of combustion of the gas to the first heat storage system (21), and reduces the amount of electricity generated by the gas-powered system; and the electricity using an outsourcing power grid is reduced during peak electricity price, and the generated energy of a combustible gas power supply system is increased.
9. Use of a combustible gas power supply unit for consumer side according to claim 8 characterized in that when the consumer participates in promoting the renewable energy consumption, the heat of combustion of the combustible gas is stored to the first heat storage system (21) reducing the combustible gas power generation, so that the consumer increases the electricity usage of the outsourcing power grid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110682700.3A CN113250769B (en) | 2021-06-21 | 2021-06-21 | Combustible gas power supply device for user side and peak shaving method and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110682700.3A CN113250769B (en) | 2021-06-21 | 2021-06-21 | Combustible gas power supply device for user side and peak shaving method and application thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113250769A CN113250769A (en) | 2021-08-13 |
| CN113250769B true CN113250769B (en) | 2021-11-05 |
Family
ID=77188827
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110682700.3A Active CN113250769B (en) | 2021-06-21 | 2021-06-21 | Combustible gas power supply device for user side and peak shaving method and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113250769B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113685240B (en) * | 2021-09-29 | 2023-03-21 | 北京思安综合能源发展有限公司 | Waste heat and complementary energy power station with heat storage and peak regulation functions, and control, design and transformation methods |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN212157096U (en) * | 2020-03-11 | 2020-12-15 | 赫普能源环境科技股份有限公司 | Peak-regulating and frequency-modulating system for solid heat storage power generation of thermal power plant |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206847090U (en) * | 2017-05-25 | 2018-01-05 | 烟台卓越新能源科技股份有限公司 | Peak regulation of power plant hold over system |
| US10731795B2 (en) * | 2017-08-28 | 2020-08-04 | Stanislav Sinatov | Method for liquid air and gas energy storage |
| CN108548168A (en) * | 2018-03-20 | 2018-09-18 | 北京工业大学 | A kind of thermal power plant's fused salt accumulation of heat peak regulation system heated using main steam |
| CN209213823U (en) * | 2018-09-07 | 2019-08-06 | 上海明华电力科技有限公司 | A kind of fired power generating unit depth peak regulation system based on bypass flue |
| CN109668134B (en) * | 2019-01-30 | 2024-01-02 | 思安新能源股份有限公司 | Start boiler system combining heat storage and release mechanism and electric heating boiler |
| CN112610292A (en) * | 2020-12-11 | 2021-04-06 | 北京前沿动力科技股份有限公司 | Deep peak regulation power generation system |
-
2021
- 2021-06-21 CN CN202110682700.3A patent/CN113250769B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN212157096U (en) * | 2020-03-11 | 2020-12-15 | 赫普能源环境科技股份有限公司 | Peak-regulating and frequency-modulating system for solid heat storage power generation of thermal power plant |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113250769A (en) | 2021-08-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111140296B (en) | Thermal power generating unit molten salt cascade storage and release energy peak regulation system and method | |
| CN107832979B (en) | Factory comprehensive energy system economic optimization scheduling method considering energy cascade utilization | |
| CN212157096U (en) | Peak-regulating and frequency-modulating system for solid heat storage power generation of thermal power plant | |
| Zhao et al. | Flue gas recovery system for natural gas combined heat and power plant with distributed peak-shaving heat pumps | |
| CN212003284U (en) | Fused salt step storage energy peak regulation system of thermal power generating unit | |
| CN102733956B (en) | System and method for fossil fuel and solar energy-complementary distributed energy supply | |
| CN111288428A (en) | Fused salt electrode boiler heat-storage power generation system | |
| CN111207048A (en) | Thermal power plant coupling photo-thermal molten salt heat collection power generation system and carbon emission reduction method | |
| CN108167076B (en) | Comprehensive distributed energy system for steam optimal utilization | |
| CN113390075A (en) | Thermal power plant solid heat storage power generation peak regulation and frequency modulation system and working method | |
| CN114877305A (en) | Green power-coal power coupling power generation system and method utilizing renewable energy discarded power | |
| CN111174194A (en) | Peak shaving system of reheating unit of thermal power plant | |
| CN113503531A (en) | Multi-power-supply heat storage peak regulation power station for coal-fired power plant transformation and peak regulation method | |
| CN113250769B (en) | Combustible gas power supply device for user side and peak shaving method and application thereof | |
| CN201819575U (en) | System using waste heat steam of metallurgical furnace to generate electricity | |
| CN115727311A (en) | Peak regulation system and method for high-temperature molten salt heat storage coupling gas cogeneration | |
| CN111577402A (en) | Blast furnace gas energy storage power generation circulating system | |
| CN208983454U (en) | A kind of Regional Energy system | |
| CN113128868A (en) | Regional comprehensive energy system scheduling optimization method and device | |
| CN207905934U (en) | A kind of synthesis distributed energy resource system of steam Optimum utilization | |
| CN214836589U (en) | Gas power supply device with peak regulation function | |
| CN104965984A (en) | Calculation method for carbon dioxide emission reduction amount of natural gas distributed energy system | |
| CN215808405U (en) | Multi-power-supply heat-storage peak-regulation power station reconstructed from coal-fired power plant | |
| CN216814121U (en) | Energy storage boiler and power generation system based on energy storage boiler | |
| CN115750089A (en) | High-temperature fused salt heat storage coupling fuel gas power generation peak shaving system and operation method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |