BOILER SUPPLY WATER AMOUNT CONTROLLING SYSTEM, AND SUPPLY WATER AMOUNT CONTROLLING METHOD

摘要

PROBLEM TO BE SOLVED: To provide a boiler supply water amount controlling system to perform a boiler supply water amount control of a high energy efficiency by performing a supply water amount control operation proper and efficient for supply water to a boiler, even for wide range fluctuations in a boiler load, a boiler pressure or a drain state.;SOLUTION: A boiler supply water amount controlling system comprises: a flow rate adjusting mechanism 1 for adjusting the supply water amount to a boiler 10; a water supply pressure detector 2 on the primary side of the flow rate adjusting mechanism 1; and a converting unit 3 for outputting the control quantity of the flow rate adjusting mechanism 1. A pressure signal of the boiler 10, a water level signal of boiler water, and a water supply pressure signal on a primary side are used as indices, and a control quantity calculated and created from a deviation between a water level signal and a preset control water level SV1 is set with a correcting ratio and bias on the basis of the differential pressure between the pressure of the boiler 10 and the water supply pressure thereby to determine a correction control quantity so that the water supply amount of the boiler is controlled on the basis of the obtained correction control quantity.;COPYRIGHT: (C)2014,JPO&INPIT