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一、引言本文拟就小合成氨厂CO变换生产过程的微机控制实践,介绍用国际流行的STD工业控制微机组成控制系统的方法,应用情况及对CO变换过程采用的控制策略。二、控制对象分析及控制思想合成氨生产过程是一个非常复杂的过程。CO变换既是合成氨原料气的净化过程也是制造的继续过程的关键环节。由固体燃料气化制取的半水煤气含有30％左右的一氧化碳,它不仅不是合成氨所需要的直接原料,而且对氨合成催化剂有害,因此必须在进入合成之前将其彻底清除,一般分两步进行,
I. INTRODUCTION This paper intends to small CO ammonia conversion plant production process of microcomputer control practice, introduced by the international popular STD industrial control microcomputer control system composed of the application, application and the CO conversion process used in the control strategy. Second, the control object analysis and control ideas Synthesis of ammonia production process is a very complicated process. CO conversion is not only the purifying process of ammonia raw material gas but also the key to the manufacturing process. Semi-water gas produced from the gasification of solid fuels contains about 30% carbon monoxide, which is not only not a direct feedstock for the synthesis of ammonia but is detrimental to the ammonia synthesis catalyst and must therefore be thoroughly removed prior to entry into the synthesis, generally in two steps ,