Chemical power poly-generation energy system and method for recycling CO2

Abstract

The invention relates to the technical fields of energy sources and environment and discloses chemical power poly-generation energy system and method for recycling CO2. In the system, coal gas obtained by gasifying a carbon-rich raw material, and a hydrogen-rich raw material, namely, coke oven gas, are mixed and subjected to a reforming reaction and a chemical synthesis reaction to obtain a reaction product, the reaction product is processed in a flash evaporation process and a rectification process for separation to obtain CO2 gas and a final product, one part of the CO2 gas separated from a rectifying tower is delivered to take part in the gasification process of the carbon-rich raw material, and the other part of the CO2 is delivered to take part in the reforming reaction. By means of the system and the method provided by the invention, the CO2 separated in the rectifying process is used as feed gas to be directly recycled by the system so that a water gas shift reaction, chemical-looping combustion and other methods with higher energy-consumption performance for improving the chemical concentration of the CO2 are avoided, the problems of reduced energy system efficiency caused by the separation of CO2 and difficulties in transporting and storing large amount of CO2 are solved, and thus, a dual-effect production mode for energy-saving and environmental-protection utilization of resources is realized.

Description

technical field [0001] The invention relates to the technical fields of energy, chemical industry and environment, in particular to an energy-saving and environment-friendly chemical power polygeneration energy system and method. Background technique [0002] my country's energy structure is dominated by coal. Coal is a fossil energy with high carbon emissions. Its traditional direct combustion utilization method and conversion technology have low energy utilization efficiency (about 35%-38%), CO 2 Emissions are serious. As early as 2007, my country's CO 2 Emissions have surpassed that of the United States, ranking first in the world. In the "Kyoto Protocol" agreement, as well as at the "Copenhagen Conference", my country expressed its active participation in the CO 2 Emission reduction, and our country is in a period of great industrial development, which undoubtedly puts our country under enormous pressure in terms of politics, economy and environment. my country's ener...

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Problems solved by technology

[0005] The object of the present invention is to provide a kind of recyclable CO 2 Chemical power polygeneration energy system and method to sol

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