In recent years,circulating fluidized bed boiler is widely used in domestic. For a long time, we have put emphasis on control of CFB Boiler, especially combustion control and the steam temperature but have obtained no good results for diverse reasons.
In this paper, a simple introduction of the circulating fluidized bed boiler principle is presented,including structure and advantages, then make focus of an analysis of 300MW circulating fluidized bed boiler main control system. At last, the expert system was tested by means of simulating faults of 75t/h CFBB. It was showed by the test results that this expert system could carry out the calculation analysis of the boiler combustion faults, and could get the reason and the processing method of faults through the qualitative analysis of the malfunction using the reasults of the calculation analysis.
Key words: Circulating fluidized bed boiler; Fault diagnosis;