water supply control device of the multi-tube once-through boiler

摘要

PROBLEM TO BE SOLVED: To provide a water supply control device for a multitubular once-through boiler, suppressing fluctuation in the amount of water to be supplied while stabilizing a water level in the steam separator of the multitubular once-through boiler.;SOLUTION: This water supply control device for the multitubular once-through boiler includes a water supply amount control value calculating means 1, and a water supply amount command value calculating means 2. The water supply amount control value calculating means 1 calculates a water supply amount input value based on a deviation between a water level control value and a water level measured value. The water supply amount command value calculating means 2 calculates a water supply amount command value based on a deviation between the water supply amount input value and the water supply amount measured value by proportional control action and integral control action.;COPYRIGHT: (C)2012,JPO&INPIT