黄磷尾气变换段间换热方式的比较与选择

Comparison and choice of heat transfer techniques for shift reaction of yellow phosphorus tail gas

CO变换反应催化剂床层排热多采用变换炉段间换热方式。介绍了生产中常用的2种换热方式，通过热力学计算，设计了直接换热与间接换热相结合的黄磷尾气部分变换系统换热方式，并通过中试对该换热方式进行验证，中试结果表明选择间接换热与直接换热相结合的换热方式是可行的，变换系统的温度可保持在250～500％，持续30天以上。

The CO shift reaction uses heat transfer technique by the sections of shift converter to remove heat. The two heat transfer ways which are often used in production are introduced, based on the thermodynamical computation, the combination process of the direct heat transfer integrated and the indirect heat transfer is designed for the shift reaction of yellow phosphorus tail gas system, the combination process is confirmed through pilot scale experiment, and the result indicates the combination process is feasible, the temperature of the shift system can maintain at 250 - 500℃,for over 30 days.