Study And Practice Of The Driving Mode Of Feed Water Pumps For 200MW Units

The main thermal economic indicator is compared and analyzed between two driving modes of feed water pumps for the 200MW unit, viz. the electric pump driving and steam turbine driving, which proves that it is possible that the transformation from electric driving mode to the steam turbine driving mode. The thermal economic efficiency test is carried out for the 200MW unit in the Xia Huayuan Power Plant, together with the modification of high pressure cylinder, intermediate pressure cylinder and the low pressure cylinder. The test provides the experiences and the suggestions. The results indicate that the thermal efficiency is equivalence for the two driving modes of feed water pumps, but the capacity is increased after the transformation. It is of great value from the electric pump driving to the steam turbine driving.