Abstract:

Alkylate production has become an inevitable trend for refineries. In consideration of the high energy consumption of alkylation unit, it’s necessary to optimize the operation of alky unit in combition with the energy supply conditions of the whole refinery. A refinery has a 300 kt/a sulfuric acid alkylation unit with 135 kgoe/t alkylate consumption, and a large amout of low-temperature hot water is available. An energy-saving revamping scheme is designed to save 1.0 MPag steam (27.0 t/h) by using low-termperature hot water as much as possible. The energy consumption of the unit can be reduced by 30.3 kgoe/t alkylate after the revamping.

Key words: alkylation unit')">

alkylation unit, low temperature hot water, energy-saving revamping