Gasification furnace heat supply system applied to chemical-looping air separation coupled oxygen-enriched combustion system

Abstract

The invention relates to a gasification furnace heat supply system applied to a chemical-looping air separation coupled oxygen-enriched combustion system. The gasification furnace heat supply system comprises a gasification furnace device, a chemical-looping air separation device and an oxygen-enriched combustion device; the chemical-looping air separation device comprises an oxygen uptake reactor, an oxygen release reactor and a heat supply component for heating the oxygen release reactor, and the oxygen uptake reactor and the oxygen release reactor circularly communicate with each other; and the oxygen-enriched combustion device comprises a combustion boiler, a gas outlet of the gasification furnace device communicates with an inlet of the heat supply component, a gas outlet of the oxygen release reactor communicates with the gasification furnace device and the combustion boiler, and a steam outlet of the combustion boiler communicates with the gasification furnace device. The gasification furnace device is additionally arranged to supply heat, the energy balance problem of a chemical-looping air separation oxygen generation system is solved, gas products of all subsystems in the system are fully utilized for gasification, heat supply, fluidization and other purposes, low-energy-consumption and pollution-free oxygen generation of the chemical-looping air separation system is achieved, finally, power generation energy consumption of the oxygen-enriched combustion system is reduced, and the efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of oxygen-enriched combustion, and in particular relates to a gasifier heating system applied to a chemical chain air separation coupling oxygen-enriched combustion system. Background technique [0002] Oxygen-enriched combustion uses high-concentration oxygen instead of air and fuel combustion, and uses about 70% of the circulating flue gas to circulate, thereby replacing the nitrogen in the traditional combustion-supporting air, while maintaining the same furnace temperature as the traditional combustion temperature. Because the N in the air comes from the combustion 2 reduce, so the thermal NOx is reduced; at the same time, the flue gas product is mainly CO 2 And part of the water vapor, high-purity CO can be obtained through a simple post-treatment process 2 , achieving a CO 2 Mitigation and capture. [0003] Oxygen-enriched combustion has the above advantages, but the main bottleneck at present is t...

AI Technical Summary

Problems solved by technology

[0005] An object of the present invention is to provide a gasifier heating system applied to a chemical looping air separation coupled oxygen-enriched combustion system, which solves the problem that the oxygen release reactor in the chemical looping air separation unit is difficult to maintain the temperature required for the reaction, and also Make full use of the gas products of each subsystem inside the system for gasification, heating and fluidization, etc., realize the low energy consumption and pollution-free oxygen production of the chemical looping air separation system, and make contributions to the application of oxygen-enriched combustion technology

Images