High-temperature and high-pressure system for desulfurisation and dehalogenation of gas

摘要

Disclosed is a system for purifying high-temperature high-pressure contaminated gas which includes a dehalogenation process for removing halogen compounds from a raw gas by recycling a dry carbon dioxide sorbent that has been exhausted by repeated removing of carbon dioxide. The system 10 includes a desulfurization apparatus 200 which removes sulfur compounds from a raw gas; and a dehalogenation apparatus 100 which is disposed at a front or rear of the desulfurization apparatus 200 to remove halogen compounds. The dehalogenation apparatus 100 includes dehalogenation reactors 104 and 108 into which a dry carbon dioxide sorbent is introduced, and dehalogenation cyclones 106 and 110 which separate the dry carbon dioxide sorbents from a mixture of a dehalogenation gas and the dry carbon dioxide sorbents discharged from the dehalogenation reactor 100 and discharges only the dehalogenation gas.