关键词: 还原吸收, 尾气处理, 焚烧炉, NO_x, 长明灯

Abstract: A high sulfur natural gas purification plant adopted the reduction and absorption process of hydrogenation reduction+amine absorption+tail gas incineration and the sulfur recovery rate exceeded 99.9%. The main function of tail gas incinerator in natural gas purification plant is to treat the residual tail gas after sulfur recovery and tail gas treatment by thermal incineration so as to make H2S and other sulfide, hydrocarbon, hydrogen, CO and other substances fully oxidized and meet the discharge standard. This can avoid environmental pollution. This paper introduces the basic control principles of tail gas incinerator in natural gas purification plant. Aiming at the problem of accident expansion caused by abnormal shutdown in the actual operation of tail gas treatment unit, the paper summarizes the key steps and principles of control and emergency disposal of tail gas incinerator which can reduce the number of accident expansion caused by abnormal shutdown. Moreover, aiming at the problems of nitrogen oxide exceeding the standard and the failure of the igniter head of the pilot lamp which often occur in the tail gas incinerator of the natural gas purification unit, separate solutions are given to ensure safe and smooth operation of the incinerator.

Key words: reduction and absorption, tail gas treatment, incinerator, nitrogen oxides, pilot lamp