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On July 5th, Daqing Petrochemical completed the domestic replacement of the core control system for its 100,000-ton/year polypropylene unit, achieving successful start-up on the first attempt and producing qualified products.
To achieve independent control of the key operating systems of the polypropylene unit, Daqing Petrochemical upgraded its Safety Instrumented System (SIS) and Distributed Control System (DCS) with intelligent and digital transformation, completing 2149 single-point tests and 47 logic joint tests. After commissioning, the safety interlock and emergency protection rate reached 100%.
In this domestic replacement, Daqing Petrochemical also relied on the domestic central control DCS platform to focus on upgrading the granulation system of the polypropylene unit, opening up the entire control chain. Simultaneously, the hardware interlock connection structure was reconstructed and the software program was recompiled, transforming over 600 equipment control points. This resolved the hidden danger of single-point failures easily leading to system-wide shutdowns, completing the underlying architecture upgrade of the granulation system from single-line programmable logic controller (PLC) control to dual-line distributed control system (DCS) distributed control.
