Coal-fired energy storage power generation system

Through the coal-fired energy storage power generation system, combined with isothermal compression and expansion technology and isovoltage countercurrent heat exchange technology, the constant voltage operation of the energy storage system during energy storage and power generation is achieved, solving the problems of instability and uncertainty of renewable energy, and improving energy utilization and grid stability.

CN222686773UActive Publication Date: 2025-03-28BEIJING ZHONGRE ENERGY TECH CO LTD
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Patent Information

Application Number
CN202421466716.6
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-06-25
Publication Date
2025-03-28
Estimated Expiration
2034-06-25

AI Technical Summary

Technical Problem

The instability and uncertainty of renewable energy sources such as photovoltaics and wind power affects the continuity and stability of energy supply, challenging the safe operation of the power grid.

Method used

The coal-fired energy storage power generation system is adopted, combined with isothermal compression and expansion technology, isovoltage countercurrent heat exchange and isovoltage energy storage technology, to realize the constant voltage operation of the energy storage system during energy storage and power generation, maximize energy utilization, and act as a backup energy power generation system to ensure the stability of the power supply system.

Benefits of technology

It improves energy utilization, solves the instability and uncertainty of renewable energy, and ensures the continuity of energy supply and the stable operation of the power grid.

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Abstract

A coal-fired energy storage power generation system comprises a coal pretreatment device, a coal gasification device, a coal gas storage tank, isothermal compression and expansion, combustion, power generation and other key links. Coal is pretreated and gasified, and generated coal gas is supplied to the combustion chamber. Atmosphere is stored in a storage tank after being subjected to multi-stage isothermal compression and cooling and then is mixed with coal gas for combustion, and generated high-temperature and high-pressure gas drives an isothermal expansion machine to do work so as to drive a generator to generate electricity. Tail gas of the expansion machine is exhausted into the atmosphere after heat recovery through the countercurrent heat exchanger. The system is further provided with a hydraulic power generator and a booster pump, and the pressure of compressed air in the compressed air storage tank is stabilized through water circulation in the water storage tank. The whole system realizes integration of energy storage and power generation through a multi-stage compression and expansion process in combination with an energy storage technology, and provides a stable and reliable solution for power supply.
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