Efficient integrated coal gasification fuel cell power generation system and method adopting high-temperature purification

Abstract

The invention provides an efficient integrated coal gasification fuel cell power generation system and method adopting high-temperature purification. The system comprises a coal preparation unit, a gasification furnace, a waste heat boiler, a high-temperature dust removal unit, a water-steam conversion tower, a fine desulfurization tower, an ejector, a fuel cell, a pure oxygen combustor, a gas turbine, a cathode air compressor, a cathode heat regenerator, an air turbine, a waste heat boiler and a steam turbine. According to the invention, the process of cooling, desulfurizing and temperature rise reaction of synthesis gas is avoided, and sensible heat of the synthesis gas is completely input into each fuel cell unit; meanwhile, the desulfurization process based on a synthesis gas solutionabsorption method is avoided, so that loss of effective synthesis gas in the absorption process is reduced, and the power generation efficiency of the whole system is greatly improved; and meanwhile,complex synthetic gas cooling and solution absorption desulfurization processes are omitted, so that the flow of the power generation system is simplified, and the operation stability and the controlflexibility of the whole system are improved.

Description

technical field [0001] The invention belongs to the technical field of clean coal power generation, and in particular relates to a high-efficiency integrated coal gasification fuel cell power generation system and method using high-temperature purification. Background technique [0002] Coal is an important guarantee for my country's energy security. Integrated coal gasification fuel cell power generation system IGFC is a power generation system that combines integrated coal gasification combined cycle power generation with high-temperature fuel cells. IGFC breaks through the theoretical efficiency limit of the Carnot cycle, and has high power generation efficiency, pollutants and CO 2 The ability to achieve near-zero emissions will become an important choice for coal-based power generation in the future. [0003] However, in the coal gasification process of IGFC, normal temperature or low temperature absorption solvent is usually used to remove H 2 S, high-temperature syn...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a high-efficiency integrated coal gasification fuel cell power generation system and method using high-temperature purification, which solves the defect that existing energy utilization efficiency is difficult to improve in the existing IGFC coal gasification process

Images