Abstract:

Modification of injection sequence of control system is made on bag filter in Guodian Zhumadian Thermal Power Company Limited. A distributed control system(DCS) replaces a pair of original programmble logic controllers (PLC)which are shared by the 2 units.It introduces the process of transformation and implementation of DCS in detail, as well as the positive effects and safety improvements that resulted from the commissioning of the system. This transformation improves the safety, stability and operabilityof the pulse jet control system of bag filters.

Key words:

bag filter, pulse valve；sequence control；distributed control system；programmble logic controllers