SILICA CONCENTRATION CONTROL METHOD IN BOILER WATER

摘要

PROBLEM TO BE SOLVED: To provide a silica concentration control method in boiler water capable of automatically controlling silica concentration in boiler water upon a boiler being started and upon ordinary operation. ;SOLUTION: Pressure of boiler water and silica concentration at that time are actually measured. The measured silica concentration is compared with reference silica concentration in reference pressure corresponding to pressure of actually measured boiler water and set separately. When it is the actually measurable silica concentration is higher than the reference silica concentration, a boiler water blow valve is opened, and after the actually measured silica concentration in the reference pressure in the next step, the measured silica concentration is raised to the reference pressure in the next step.;COPYRIGHT: (C)1997,JPO