Abstract:

There is insufficient gasification air volume, high power consumption, high failure rate and high maintenance cost in the pneumatic ash handling system for ESP of 2×1000MW ultrasupercritical coalfired unit in Huadian Laizhou Power Generation Company Limited. Taking advantage of energysaving retrofit, the combination of the ESP dust collector gasification fan and the boiler desulfurization/oxidation fan isproposed. Comparing the gasification air volume, failure rate and energy saving before and after the transformation, it is found out that the unit runs stably, the gasification air volume is increased, the maintenance cost of the equipment is reduced, and the energy saving effect is obvious after the retrofit.

Key words:

pneumatic ash handling system, ESP gasification wind, desulfurization/oxidized wind, energy consumption