CN217109504U - Coal machine standby and green energy storage integrated power station - Google Patents
Coal machine standby and green energy storage integrated power station Download PDFInfo
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- CN217109504U CN217109504U CN202220252723.0U CN202220252723U CN217109504U CN 217109504 U CN217109504 U CN 217109504U CN 202220252723 U CN202220252723 U CN 202220252723U CN 217109504 U CN217109504 U CN 217109504U
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Abstract
The utility model provides a reserve green energy storage integration power station of holding concurrently of coal machine which characterized in that: the coal-electric machine set is transformed into a coal machine standby and green energy storage integrated power station; the coal electric unit plays a green energy storage function during the long-term shutdown period; and the normal starting function of the coal electric unit is exerted during the emergency starting period of the coal electric unit. A reserve green energy storage integration power station of holding concurrently of coal machine plays the function of green energy storage power station in the period of stopping using for a long time at coal-electric set, can absorb wind-powered electricity, photovoltaic electricity, become the "cistern" of green electricity, avoid coal-electric set because of the long-term reduction loss and the huge depreciation of property subtracting of the equipment performance that forms of idle for a long time of a large amount of coal-electric capital that the shut down caused, the reduction of coal-electric industry employment post. The method is mainly applied to the transformation of the coal-electric machine set which is stopped for a long time and started for emergency.
Description
Technical Field
The utility model belongs to the technical field of reform transform coal-electric set, especially a reserve green energy storage integration power station of holding concurrently of coal machine.
Background
For a long time, coal power is the main power supply for ensuring the safety of power supply in China. By the end of 2019 years, the coal electric installation of China has 10.4 billion kilowatts and the power generation amount has 4.56 trillion kilowatts, and the coal electric installation respectively accounts for 51.8 percent and 62.2 percent of the total installation and the total power generation amount. At present, the carbon dioxide emission in the power generation and heat supply industry of China accounts for over 40 percent of the national emission, and is a key industry for national carbon dioxide emission.
The power industry is one of the main industries of coal consumption, energy conservation, emission reduction, upgrading and transformation of coal and electricity are deeply implemented, and the coal consumption of thermal power supply is continuously reduced. For a coal-electricity unit with the power supply coal consumption of more than 300 g of standard coal/kilowatt hour, the energy-saving reconstruction should be implemented by accelerating the creation condition, the units which cannot be reconstructed are gradually eliminated and shut down, and the units with the condition are converted into emergency standby power supply according to the condition.
Accelerating the backward productivity of the coal electricity elimination. The working strength of the backward capacity of the coal electricity elimination is increased, and the structure of the coal electricity industry is optimized and adjusted. The shut-down coal-electric machine set is eliminated without being disassembled, and all created conditions are converted into emergency standby and peak shaving power supplies in principle. The long-term shutdown and emergency start of the medium-sized coal-fired unit are specific measures for achieving the targets of carbon emission reduction and carbon peak reaching, and are effective ways for optimizing a power supply structure and improving energy utilization efficiency. The unit which meets the requirements of policies and standards such as energy efficiency, environmental protection, safety and the like can be closed without dismantling under the conditions of no need of original site reconstruction, no need of remote construction such as 'moving out of city and going out of suburb' and the like, and can be used as an emergency standby power supply to play a role. Scientifically identifying and quitting the emergency standby unit, strictly managing the operation and dispatching of the emergency standby power supply, stopping the emergency standby unit in a normal state, starting the emergency standby unit in an emergency state, stopping the emergency standby unit after the emergency standby power supply operates at a peak, and contributing to reducing the overall energy consumption and emission while playing a role in protection and supply.
The current disposal conditions of the medium-sized coal-electricity unit which is normally shut down for a long time and is started in an emergency are mainly to execute normal shut down and emergency start without other synergistic measures, and the phenomena of idling and waste of a large amount of coal-electricity capital exist.
The normal long-term shutdown and emergency start of the medium-sized coal power generation unit cause long-term idle of a large amount of coal power, huge waste and reduction of employment posts in the coal power industry. The method has the advantages that the research on the technical transformation problem of the long-term shutdown and emergency standby coal-electricity set is actively carried out, and the method has great economic and social significance.
Disclosure of Invention
The utility model aims at transforming through the coal-electricity unit to stopping for a long time, emergent the launching, avoiding the reduction of the huge depreciation of performance decline loss and the huge depreciation of asset of the long-term idle equipment that forms of a large amount of coal-electricity capital that the coal-electricity unit caused because of stopping for a long time, coal-electricity trade employment post.
Therefore, the idea of considering a suitable transformation technical scheme is that the emergency starting function of the coal electric unit is related to the safety of electric power, so that the function of not influencing the emergency starting of the coal electric unit is firstly considered when the transformation technology is selected, and the coal electric unit can play a role during the long-term shutdown period, so that the value is created.
The policies of normal-state long-term stopping and emergency starting of part of coal-electricity units are analyzed because the coal-electricity unit coal-fired boiler systems are not high in efficiency and meet the actual requirements of double-carbon target carbon emission reduction, the normal-state long-term stopping and emergency starting coal-electricity units are substantially equal to the coal-fired boiler systems of the coal-electricity units which are stopped for a long time and started for an emergency, the coal-fired boiler systems are used for generating high-temperature and high-pressure steam at the temperature of more than 540 ℃, and the high-temperature and high-pressure steam is used for generating electricity for a steam turbine.
If an electric energy storage system similar to a coal-fired boiler system of a coal-electric machine set in function is designed, green electricity or valley electricity such as wind electricity and photovoltaic electricity is adopted as an energy source for the electric energy storage system, the electric energy storage system can replace the coal-fired boiler system in function, and can generate water vapor with high temperature and high pressure of 540 ℃; the electric energy storage system is parallel to the coal-fired boiler system, so that the electric energy storage system is started to replace the coal-fired boiler system during the long-term outage of the coal-fired power units, the original steam power generation system and the power transmission and transformation system of the old coal-fired power units are benefited, and the new system can realize the function of a green energy storage power station.
The utility model provides a reserve technical scheme who holds concurrently green energy storage integration power station of coal machine adopts this technical scheme can reform transform into the reserve green energy storage integration power station that holds concurrently of coal machine with this coal-electric set that stops for a long time, emergent the starting action that normally exerts in the period can be emergent launched in the coal machine to this integration power station, the function in the green energy storage power station of the period of stopping to exert under the coal machine normality.
The technical scheme of the utility model as follows:
the utility model provides a reserve green energy storage integration power station of holding concurrently of coal machine which characterized in that: the coal-electric machine set is transformed into a coal machine standby and green energy storage integrated power station; the coal electric unit plays a green energy storage function during the long-term shutdown period; the normal functions of the coal-electricity unit are exerted during the emergency starting period of the coal-electricity unit; the method is mainly applied to the transformation of the coal-electric unit which is normally out of service for a long time and is started in emergency.
The utility model provides a reserve green energy storage integration power station of holding concurrently of coal machine which characterized in that: the system comprises at least one coal-fired boiler system, at least one electric energy storage system, at least one steam power generation system and at least one power transmission and transformation system;
the electric energy storage system is connected with the steam power generation system through a main steam pipeline and a water return pipeline respectively; the main steam pipeline is connected with the water return pipeline in parallel; the steam power generation system is connected with the power transmission and transformation system through a cable; the power transmission and transformation system is connected with the electric energy storage system through a cable;
the coal-fired boiler system is respectively connected with the steam power generation system through a main steam pipeline and a return water pipeline;
the coal-fired boiler system is parallel to the electric energy storage system;
the electric energy storage system adopts an electric heating molten salt energy storage system, and comprises a molten salt electric heater, a high-temperature molten salt storage tank, a molten salt steam superheater, a molten salt steam generator, a molten salt water preheater and a low-temperature molten salt storage tank; the molten salt electric heater is sequentially connected with the high-temperature molten salt storage tank, the molten salt steam superheater, the molten salt steam generator and the molten salt water preheater through a molten salt pipeline; the molten salt water preheater is connected with the low-temperature molten salt storage tank through a molten salt pipeline; the low-temperature molten salt storage tank is connected with the molten salt electric heater through a molten salt pipeline; the flow of the molten salt is powered by a molten salt pump.
Further, reserve green energy storage integration power station of holding concurrently of coal machine, its characterized in that: the water return pipelines are a plurality of water return pipelines, water vapor or condensed water flows in the water return pipelines, and the flowing direction of the water vapor or the condensed water flows from the steam power generation system to the electric energy storage system.
Further, reserve green energy storage integration power station of holding concurrently of coal machine, its characterized in that: the power transmission and transformation system is connected with an external power grid through a cable; the coal-fired boiler system is connected with the steam power generation system through a main steam pipeline and a return water pipeline respectively to form a coal-electric unit; the energy of the electric energy storage system is from the electricity of an external power grid or the electricity generated by the coal-electricity unit.
Further, reserve green energy storage integration power station of holding concurrently of coal machine, its characterized in that: the power of the external grid is green.
Further, a reserve green energy storage integration power station of holding concurrently of coal machine, its characterized in that: the electricity of the external grid is the valley electricity.
Further, reserve green energy storage integration power station of holding concurrently of coal machine, its characterized in that: the electricity of the external power grid is wind power or photovoltaic electricity.
Further, reserve green energy storage integration power station of holding concurrently of coal machine, its characterized in that: the fused salt adopts low-melting-point quaternary fused salt, and the fused salt has the parameters of 94 ℃ of melting point, 628 ℃ of decomposition temperature and 199 kwh/t of heat storage density.
Compared with the prior art, the utility model, have following advantage and outstanding technological effect:
the utility model discloses a coal machine standby and green energy storage integrated power station normally plays the emergency starting function of a coal electric machine set in the emergency starting period of the coal electric machine set; the function of a green energy storage power station is exerted in the normal long-term shutdown period of the coal-electricity unit, wind electricity and photovoltaic electricity can be absorbed to form a green electricity 'reservoir', and the performance reduction loss of equipment, the huge depreciation and value reduction of assets and the reduction of employment posts of the coal-electricity industry caused by long-term idle of a large amount of coal-electricity capital due to long-term shutdown of the coal-electricity unit are avoided.
Drawings
Fig. 1 is a schematic structural diagram before modification of a coal electric machine set.
Fig. 2 is the utility model discloses a reserve structure schematic diagram who holds concurrently green energy storage integration power station of coal machine.
In the figure: 1. a coal fired boiler system; 2. a steam power generation system; 3. a power transmission and transformation system; 4. an external power grid; 5. a cable; 6. a main steam line; 7. a water return pipeline; 8. an electrical energy storage system.
Detailed Description
The invention will be further explained with reference to the drawings and the detailed description below:
fig. 1 is a schematic structural diagram of a coal-fired power unit before modification, wherein the coal-fired power unit consists of a coal-fired boiler system 1, a steam power generation system 2 and a power transmission and transformation system 3; the coal-fired boiler system 1 is respectively connected with the steam power generation system 2 through a main steam pipeline 6 and a water return pipeline 7; the main steam pipeline 6 is connected with the water return pipeline 7 in parallel; the steam power generation system 2 is connected to the power transmission and transformation system 3 through a cable 5.
Fig. 2 is a schematic structural diagram of the coal-fired machine standby and green energy storage integrated power station of the present invention, which includes at least one coal-fired boiler system 1, at least one molten salt energy storage system 8, at least one steam power generation system 2, and at least one power transmission and transformation system 3;
the electric energy storage system 8 is connected with the steam power generation system 2 through a main steam pipeline 6 and a water return pipeline 7 respectively; the main steam pipeline 6 is connected with the water return pipeline 7 in parallel; the steam power generation system 2 is connected with the power transmission and transformation system 3 through a cable 5; the power transmission and transformation system 3 is connected with a molten salt energy storage system 8 through a cable 5;
the coal-fired boiler system 1 is respectively connected with the steam power generation system 2 through a main steam pipeline 6 and a water return pipeline 7;
the coal fired boiler system 1 is in parallel with the electrical energy storage system 8.
The following is specifically described by taking an example of transforming a 300MW long-term shutdown emergency-enabled coal-electric machine into a 300MW coal-machine standby and green energy-storage integrated power station:
the electric energy storage system 8 preferably adopts an electric heating molten salt energy storage system, and the system comprises a molten salt electric heater, a high-temperature molten salt storage tank, a molten salt steam superheater, a molten salt steam generator, a molten salt water preheater and a low-temperature molten salt storage tank; the molten salt electric heater is sequentially connected with the high-temperature molten salt storage tank, the molten salt steam superheater, the molten salt steam generator and the molten salt water preheater through a molten salt pipeline; the molten salt water preheater is connected with the low-temperature molten salt storage tank through a molten salt pipeline; the low-temperature molten salt storage tank is connected with the molten salt electric heater through a molten salt pipeline; providing power for the flow of the molten salt through a molten salt pump; the fused salt preferably adopts low-melting-point quaternary fused salt, and the fused salt has the parameters of 94 ℃ of melting point, 628 ℃ of decomposition temperature and 199 kwh/t of heat storage density; the energy for heating the molten salt preferably adopts green electricity or valley electricity such as wind power, photovoltaic electricity and the like;
when the coal-electric machine set needs to be started in an emergency mode in the power grid, the electric energy storage system 8 is closed, the coal-fired boiler system 1 is in a normal starting state, and the coal machine standby and green energy storage integrated power station plays a normal emergency starting function of the coal-electric machine set;
when the coal-fired boiler system 1 is in a closed and deactivated state and the electric energy storage system 8 is started during the period that the coal-fired boiler unit needs to be deactivated for a long time by the power grid, the coal machine standby and green energy storage integrated power station plays a role of a green energy storage power station;
the method comprises the steps that wind power, photovoltaic power and other green electricity or valley electricity from an external power grid 4 and passing through a power transmission and transformation system 3 are used for heating molten salt at 200 ℃ in a low-temperature molten salt storage tank to 560 ℃ through a molten salt electric heater, the molten salt at 560 ℃ is pumped into a high-temperature molten salt storage tank through a molten salt pump for storage, when an electric energy storage system 8 is started, the molten salt at 560 ℃ is pumped into the low-temperature molten salt storage tank through the molten salt pump and sequentially flows through a molten salt steam superheater, a molten salt steam generator and a molten salt water preheater, the high-temperature molten salt exchanges heat with water at the position, the high-temperature molten salt is changed into low-temperature molten salt at 200 ℃ at a molten salt water preheater molten salt outlet, the low-temperature molten salt is pumped into the low-temperature molten salt storage tank through the molten salt pump for storage, the water is changed into high-temperature high-pressure steam at 540 ℃ through heat exchange, and the high-temperature high-pressure steam pushes a steam turbine to generate electricity;
when the power grid needs the flexible operation time period during the emergency starting of the coal-electric machine set, the electric energy storage system 8 can be partially started, at the moment, the coal-fired boiler system 1 is in the starting flexible operation state, and the coal machine standby and green energy storage integrated power station plays a role in the emergency starting flexible operation of the coal-electric machine set.
The above description of one embodiment of the present invention is provided for illustration, but the present invention is only a preferred embodiment of the present invention, and should not be considered as limiting the scope of the present invention. All the simple modifications, equivalent changes and modifications made within the scope of the present invention should be still within the patent coverage of the present invention.
Claims (7)
1. The utility model provides a reserve green energy storage integration power station of holding concurrently of coal machine which characterized in that: comprises at least one coal-fired boiler system (1), at least one electric energy storage system (8), at least one steam power generation system (2) and at least one power transmission and transformation system (3);
the electric energy storage system (8) is connected with the steam power generation system (2) through a main steam pipeline (6) and a water return pipeline (7) respectively; the main steam pipeline (6) is connected with the water return pipeline (7) in parallel; the steam power generation system (2) is connected with the power transmission and transformation system (3) through a cable (5); the power transmission and transformation system (3) is connected with the electric energy storage system (8) through a cable (5);
the coal-fired boiler system (1) is respectively connected with the steam power generation system (2) through a main steam pipeline (6) and a water return pipeline (7);
the coal-fired boiler system (1) is parallel to the electric energy storage system (8);
the electric energy storage system (8) adopts an electric heating molten salt energy storage system, and the system comprises a molten salt electric heater, a high-temperature molten salt storage tank, a molten salt steam superheater, a molten salt steam generator, a molten salt water preheater and a low-temperature molten salt storage tank; the molten salt electric heater is sequentially connected with the high-temperature molten salt storage tank, the molten salt steam superheater, the molten salt steam generator and the molten salt water preheater through a molten salt pipeline; the molten salt water preheater is connected with the low-temperature molten salt storage tank through a molten salt pipeline; the low-temperature molten salt storage tank is connected with the molten salt electric heater through a molten salt pipeline; the flow of the molten salt is powered by a molten salt pump.
2. The integrated power station integrating coal machine backup and green energy storage as claimed in claim 1, characterized in that: the water return pipelines (7) are a plurality of water return pipelines, steam or condensed water flows in the water return pipelines, and the flowing direction of the steam or condensed water flows from the steam power generation system (2) to the electric energy storage system (8).
3. The integrated power station integrating coal machine backup and green energy storage as claimed in claim 1, characterized in that: the power transmission and transformation system (3) is connected with an external power grid (4) through a cable (5); the coal-fired boiler system (1) is connected with the steam power generation system (2) through a main steam pipeline (6) and a return water pipeline (7) respectively to form a coal-electric machine set; the energy of the electric energy storage system (8) is from the electricity of an external power grid (4) or the electricity generated by the coal-electricity unit.
4. The integrated power station with functions of standby and green energy storage for the coal machine as claimed in claim 3, characterized in that: the electricity of the external power grid (4) is green electricity.
5. The integrated power station with functions of standby and green energy storage for the coal machine as claimed in claim 3, characterized in that: the electricity of the external grid (4) is valley electricity.
6. The integrated power station with functions of standby and green energy storage for the coal machine as claimed in claim 3, characterized in that: the electricity of the external power grid (4) is wind power or photovoltaic electricity.
7. The integrated power station integrating coal machine backup and green energy storage as claimed in claim 1, characterized in that: the fused salt adopts low-melting-point quaternary fused salt, and the fused salt has the parameters of 94 ℃ of melting point, 628 ℃ of decomposition temperature and 199 kwh/t of heat storage density.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202220252723.0U CN217109504U (en) | 2022-02-07 | 2022-02-07 | Coal machine standby and green energy storage integrated power station |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202220252723.0U CN217109504U (en) | 2022-02-07 | 2022-02-07 | Coal machine standby and green energy storage integrated power station |
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| CN217109504U true CN217109504U (en) | 2022-08-02 |
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| CN202220252723.0U Active CN217109504U (en) | 2022-02-07 | 2022-02-07 | Coal machine standby and green energy storage integrated power station |
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