Multifunctional energy system based on appropriate conversion of chemical energy of fossil fuel

Abstract

The invention discloses a multifunctional energy system based on the appropriate conversion of chemical energy of fossil fuel, which comprises a synthetic gas preparation and afterheat recovery subsystem for appropriately converting coal and natural gas into high temperature synthetic gas respectively through a partial gasification and reforming unit, cooling and then conveying the high temperature synthetic gas to a chemical product synthesizing and refining subsystem, and simultaneously conveying the generated high temperature steam to a power generation subsystem; a chemical product synthesizing and refining subsystem for pressurizing and conveying the received high temperature synthetic gas to a chemical product synthesis reactor for synthesizing the chemical product, and then obtaining the refined chemical product through a refining unit; and a power generation subsystem for converting the unconverted synthetic gas in the chemical product synthesizing and refining subsystem and the high temperature steam from the afterheat recovery subsystem into electric energy. According to the invention, the problems that complete gasification of coal and total reforming of natural gas canlead to large irreversible loss, the equipment is large and the cost is high are solved, the efficiency of the system is enhanced and the investment on system equipment is lowered.

Description

technical field [0001] The invention relates to the technical field of energy and power, in particular to a multifunctional energy system based on moderate conversion of chemical energy of fossil fuels such as coal and natural gas. Background technique [0002] Currently, fossil fuels such as coal and natural gas are mainly used in chemical and power production systems. Coal is mostly burned directly by coal-fired power plants to produce steam, and the steam drives steam turbines to generate electricity. The direct combustion of coal to generate electricity is not only inefficient, but also seriously polluting. Recently, coal gasification is considered to be a very promising technology. Coal is converted into synthesis gas (mainly composed of CO and H2) through gasification. 2 ), not only can be used as a combined cycle fuel to improve energy utilization efficiency and reduce pollution, but also can be used as a raw material for chemical production. Complete coal gasificat...

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Problems solved by technology

[0007] In view of this, the main purpose of the present invention is to provide a multifunctional energy system based on the moderate conversion of coal and natural gas, to solve the problems of large irreversible losses when the coal is completely gasified and the natural gas is completely reformed, and the equipment is huge and expensive, so as to improve System efficiency, reduce system equipment investment

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