Solid heat storage power generation peak and frequency modulation system for thermal power plant and working method

A technology of solid heat storage, peak regulation and frequency regulation, applied in steam generation methods, heat storage equipment, steam superheating, etc., can solve the problems of low load power grid capacity, waste, generator set shutdown and other problems

Pending Publication Date: 2021-09-14
HEPU ENERGY ENVIRONMENTAL TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to meet the requirements of power load, the current power generation installed capacity and grid capacity are built according to the maximum demand. As the peak-to-valley difference of the power grid increases day by day, it will inevitably lead to the shutdown of power generation units or low-load operation during off-peak power consumption and the reduction of grid capacity. waste

Method used

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  • Solid heat storage power generation peak and frequency modulation system for thermal power plant and working method
  • Solid heat storage power generation peak and frequency modulation system for thermal power plant and working method
  • Solid heat storage power generation peak and frequency modulation system for thermal power plant and working method

Examples

Experimental program
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Effect test

Embodiment 1

[0042] Such as figure 1As shown, a thermal power plant solid heat storage power generation peak regulation and frequency regulation system includes a solid heat storage electric boiler 9 and its water supply pipeline 19 , steam connecting pipeline 20 and unit peak regulation and frequency regulation control unit 15 . The solid thermal storage electric boiler includes solid thermal storage bricks 18, peak-shaving and frequency-regulating electric heaters 10, high-temperature-resistant fan 17 and wind-water heat exchanger 12. The peak-shaving and frequency-regulating system of solid heat storage power generation in thermal power plants is set in thermal power plants. The utility boiler 1 in the thermal power plant burns pulverized coal to heat the water in the boiler to generate water vapor, which drives the large steam turbine 2 to generate kinetic energy, and the large steam turbine drives the rotor of the generator 3 to move and cut the magnetic force lines to generate electr...

Embodiment 2

[0053] Such as figure 2 As shown, in this embodiment, a high-temperature flue gas heat exchanger 13 is also arranged in the solid heat storage electric boiler 9 to connect the flue gas supply and return pipeline of the utility boiler 1 of the thermal power plant. The flue gas supply and return pipeline includes a flue gas supply pipeline and a flue gas return pipeline. An inlet valve is installed on the flue gas supply pipeline, and an outlet valve is installed on the flue gas return pipeline. When it is necessary to store heat on the solid heat storage bricks, open the inlet valve on the flue gas supply pipeline, and the high-temperature resistant fan 17 draws the high-temperature flue gas from the boiler of the thermal power plant through the flue gas supply pipeline to heat the solid heat storage bricks, and the solid heat storage electric boiler After the solid heat storage brick absorbs the heat of the high-temperature flue gas, it reaches its heat storage temperature. ...

Embodiment 3

[0055] Such as image 3 As shown, in this embodiment, a high-temperature steam heat exchanger 14 is also arranged in the solid thermal storage electric boiler, and the high-temperature steam heat exchanger 14 is connected to a high-temperature steam pipeline, and the high-temperature steam pipeline is connected to the main steam pipe of a power station boiler in a thermal power plant through an inlet valve. The reheater pipeline and steam turbine extraction pipeline extract any high-temperature steam from the main steam, reheat steam or steam turbine extraction steam of the power plant boiler. The solid heat storage brick in the solid heat storage electric boiler reaches its heat storage temperature after absorbing the heat of high-temperature steam. When the solid heat storage bricks are required to release heat energy for power generation, the high temperature resistant fan 17 pushes the air through the air duct to flow to the solid heat storage bricks, and the solid heat st...

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Abstract

The invention discloses a solid heat storage power generation peak regulation and frequency modulation system for a thermal power plant and a working method. The system comprises a solid heat storage electric boiler, a water supply pipeline and a steam connection pipeline thereof and a unit peak regulation control unit. The solid heat storage electric boiler comprises solid heat storage bricks, a peak and frequency regulation electric heater, a high-temperature-resistant fan and an air-water heat exchanger. The peak and frequency regulation electric heater supplies power to heat the solid heat storage bricks in an off-peak electricity period, and the high-temperature-resistant fan sucks air into the solid heat storage electric boiler to exchange heat with the solid heat storage bricks in a non-off-peak electricity period to form hot air. The wind-water heat exchanger heats water in the water supply pipeline into superheated steam through hot air, and the superheated steam is fed into the steam turbine to drive the generator to generate electricity. The system has the beneficial effects that surplus electric power of the thermal power plant is stored in the solid heat storage bricks in the electricity consumption valley period, the generating capacity of the thermal power plant is increased in an auxiliary mode in the electricity consumption peak period, and therefore heat storage peak regulation and frequency modulation of the thermal power plant are achieved.

Description

technical field [0001] The invention relates to the field of energy utilization, in particular to a peak-shaving and frequency-regulating system and working method for solid heat storage power generation in a thermal power plant. Background technique [0002] Energy storage power stations are an urgent need to improve the efficiency, safety and economy of conventional energy generation and transmission. In order to meet the requirements of power load, the current power generation installed capacity and grid capacity are built according to the maximum demand. As the peak-to-valley difference of the power grid increases day by day, it will inevitably lead to the shutdown of power generation units or low-load operation during off-peak power consumption and the reduction of grid capacity. waste. In 2011, the total load factor of conventional coal-fired generating units nationwide was only 51.8%, and the load utilization factor of the power grid was also less than 55%. The use ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F22B1/28F22B33/18F22G1/00F28D20/00F01K23/00F01K7/44F01K7/40F01K7/22F01D15/10
CPCF22B1/28F22B33/18F22G1/00F28D20/0056F01K23/00F01K7/44F01K7/40F01K7/22F01D15/10Y02E60/14
Inventor 崔华杨豫森
Owner HEPU ENERGY ENVIRONMENTAL TECHNOLOGY CO LTD
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