Abstract:

This paper introduces the principle of Huadian Laizhou Power Generation Company Limited air preheater control circuit, air preheater accident analysis and the problems existing in the control loop.At the same time,puts forward the solution of pneumatic motor circuit, DC power supply circuit and PLC control circuit,which can optimize these circuit.It can be improving the reliability and safety of the air preheater by transformating control circuit of air preheater.

Key words:

air preheater, control circuit, accident analysis;transformation, reliability