Abstract:

The high concentration butadiene valve in butadiene extraction unit has problems of easy polymerization of medium and short operation cycle, seriously affecting the safe and stable operation of the unit. The polymerization mechanism and reasons of butadiene are briefly introduced, and the anti-polymerization measures for high concentration butadiene valve in butadiene extraction unit with acetonitrile method are introduced. Through technical analysis, the polymerization problem of valve is solved, a reasonable transformation scheme is put forward, and a type of anti-polymerization valve is developed to ensure the reliable operation of valve and prolong the operation cycle of unit in essence.

Key words: butadiene, valve, polymerization, long period