Research on steam power system in larger scale coal to olefin plant
BA Liming
ZHANG Feng
HUANG Feng
LI Chufu
YAO Jinsong
Abstract：In order to solve the problems of steam power system in coal to olefins (CTO) project,like low steam parameters,high coal consumption and standby capacity,network imbalance,the characteristics of steam power system were analyzed.By introducing supercritical coal power units and a manifold steam pipe system,a new design concept in large-scale CTO project was presented.In a 1.2 Mt/a CTO steam power system,a combination of two 350 MW supercritical coal power units with 8-9 regenerative and 1 reheat system,reduced coal consumption rate from 450 g/kWh to 320 g/kWh.A manifold steam pipe system helped to achieve flexible switching between units,to meet a 8 000 h/a high reliability standard with zero standby.System power output met the requirements of CTO project,and it could serve 255 MW to power grid.The system had good expansibility to meet different scale of the CTO project in the future.
Keywords：coal to olefinsteam power systemsupercriticalnon-backup
Publication Date：2017-01-01