This paper describes the problems encounted in the design of instrumentation and automatic control system for the first mixed C_4 solvent deasphalting unit built in China as well as the measures adopted to surmount these problems.

• 本文从仪表、自控系统的角度；介绍了我国第一套混合C_4溶剂脱沥青装置设计中遇到的问题及采取的措施.