Abstract:

This paper analyzes the problems in the operation of cracking gas valve groups in ethylene plant, and proposes a method of adding external decoking accessories to adjust the cracking gas valve to the proper position while the single gate disc has a direct action. An innovative method for cleaning single gate cracking gas valve is presented, and some proposals are put forward for the applications of external decoking accessories.

Key words: cracking gas valve, seal leakage, gate, decoking accessories