Patent ID: 6019818
Filing Date: 2000-02-01
Classification: B01D,F23J

Abstract:
A process for simultaneously quenching and scrubbing a hot gas stream, which comprises:passing a liquid downwardly through a packed bed to provide a continuously wetted, packed bed;passing a gas stream containing gaseous and particulate contaminants and having a temperature of about 750.degree. F. to 3000.degree. F. concurrently with said liquid through said continuously wetted, packed bed, without any quenching occurring prior to passing said gas stream through said continuously wetted, packed bed, to simultaneously quench and scrub said gas stream;recovering a gas substantially free of gaseous and particulate contaminants and having a temperature of about 90.degree. F. to 200.degree. F. from the bottom of said continuously wetted, packed bed;recycling liquid which has been passed through said packed bed; anddisposing the packed bed within a column having an inside wall wherein a hot-cool interface is formed on the inside wall of the column by:tangentially injecting a liquid onto a circular, horizontal shelf formed between an upper portion of the column wall and a lower portion of the column wall, said lower portion having a lesser diameter than said upper portion; andoverflowing a steady stream of the tangentially injected liquid from said shelf upon the lower portion of the column wall to uniformly wet the inside of said lower portion of the column wall.