Abstract:

The emptying of quench system during the overhaul of ethylene plant has always been the difficulty and control point of plant shutdown. After two rounds of revamping and expansion, there were many changes on the site of the ethylene plant of SINOPEC Qilu Company, bringing a lot of difficulties to the emptying of quench system. In view of the characteristics of quench system including a large number of equipment, complex process and heavy oil products, related processes were prepared in advance, all the disciplines coordinated with each other, and the emptying replacement speed and quality of the system were improved through scheme optimization. On the premise of recovering oil products from oily sewage as far as possible, the low-emission emptying replacement of quench system were achieved in 8 days.

Key words: quench system, quench oil, rushing water, emptying, replacement, low emission