Suizhong Power Plant Replaces Leaking BFP Recirc Valves

Because of losses due to leakage the Suizhong Power Plant, a supercritical-pressure power generating station in China , has replaced its eight minimum-flow boilerfeed pump recirculation control valves. These serve both motor-driven and turbine-driven BFPs at Suizhong.

The 3-inch × 3-inch (75-millimeter × 75-millimeter) DRAG® valves serving the motor-driven BFPs are designed for 330,000 pounds/hour (150 meters/hour) at an inlet pressure of 4900 psia (34 MPaA) at 356 F (180 C). The 4-inch × 4-inch (100-millimeter × 100-millimeter) valves serving the turbine-driven BFPs are designed for 815,000 pounds/hour (370 meters/hour) at the same inlet pressure and temperature as those serving the motor-driven pumps.

The use of DRAG® technology for these replacements was based on CCI’s previous successful replacement of spraywater control valves at their Panshan power plant which had failed due to erosion after only 168 hours of operation.

Published in SOLUTIONS Spring 2001