BOILER CONTROL DEVICE AND CONTROL METHOD

摘要

PROBLEM TO BE SOLVED: To provide a boiler control device and a control method capable of more appropriately controlling conductivity of boiler water inside a boiler drum.SOLUTION: There is provided a boiler control system comprising: a water level meter; a feed water valve; a blow valve; first through third flow meters; a conductivity meter; and first and second control sections. The water level meter measures a water level inside a drum. The feed water valve regulates a flow rate of feed water. The blow valve regulates a flow rate of blow. The first flow meter measures the flow rate of the feed water. The second flow meter measures a flow rate of steam. The third flow meter measures the flow rate of the blow. The conductivity meter measures conductivity of water inside the drum. The first control section controls the feed water valve such that the water level is constant. The second control section calculates the conductivity after a predetermined period of time has elapsed on the basis of measurement results of the conductivity meter, the second flow meter and the third flow meter and controls the blow valve such that the conductivity is within a setting range in response to calculation results.