Liquid fuel-liquid oxygen high pressure direct combustion steam power system

Abstract

The invention discloses a liquid fuel-liquid oxygen high pressure direct combustion steam power system. According to the system, liquid oxygen and liquid fuel are fed into a high pressure liquid oxygen combustor through a liquid oxygen pump and a fuel pump correspondingly to combust and generate high pressure and high temperature power steam, and the steam temperature is adjusted in the mode that a cooling agent is injected into the high pressure liquid oxygen combustor under high pressure. The ultrahigh pressure and high temperature power steam drives an expansion machine to generate electricity at higher electricity generation efficiency, exhaust steam at an outlet of the expansion machine is separated through condensers, and water and carbon dioxide are liquefied through condensation. The liquid oxygen needed by the system is produced by an air separation device through surplus electricity in the trough load period of a power grid and stored, part of the high cost for liquid oxygen production is counteracted, and the system has the remarkable advantages of large-scale energy storage with liquid oxygen, zero emission of nitrogen oxides, low-cost carbon capture, high-efficiency electricity generation and the like.

Description

technical field [0001] The invention relates to the technical field of clean energy power engineering, in particular to a steam power system combining liquid fuel liquid oxygen high-pressure direct combustion technology, liquid oxygen scale energy storage, zero nitrogen oxide emission and carbon dioxide capture technology. Background technique [0002] Energy is the pillar industry of modern society. Fossil energy accounts for more than two-thirds of my country's electric energy production. The main fuels are coal, oil and natural gas. The power generation devices mainly include steam power devices using Rankine cycle. Brayton cycle gas power plant and gas-steam combined cycle power plant combining the two. While supporting the rapid development of modern society, fossil energy also poses a serious threat to the earth's environment. Pollutants and greenhouse gas emissions in the production of fossil energy have become a major issue of global concern and need to be resolved u...

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Problems solved by technology

[0003] On the other hand, with the development of renewable energy and its increasing share in the power grid, due to the passive nature of renewable energy production, the problem of balance between supply and demand of power grid loads has become increasingly prominent. Large-scale energy storage has become an urgently needed supporting technology for the power grid. Due to the relative lag of energy storage technology, a large amount of renewable energy, such as wind power, is forced to give up

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