Shandong Weifang soda ash plant is a new plant, advanced equipment, but most of soda ash production or manual operation, the method of operation behind the development of production can not meet the needs of advanced equipment and backward in order to solve the contradiction operation, stable production, improve utilization of raw materials reduce energy consumption, increase production, soda from Honeywell company introduced advanced level of TDC-3000 distributed control system and the heart for caustic soda production process - heavy alkali carbonation steps, in order to achieve industrial production global control.