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Control process of a pH / phosphate program in a boiler water system
Control process of a pH / phosphate program in a boiler water system
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机译：锅炉水系统中pH /磷酸盐程序的控制过程
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摘要
A pH/phosphate program in a boiler water system is controlled by: (1) determining the feed rate of the phosphate to the boiler by adding to a phosphate-feed stream containing the phosphate feeding to the boiler a phosphate-feed tracer in known proportion to the phosphate, determining the concentration of the phosphate-feed tracer in the phosphate-feed stream and correlating the phosphate-feed tracer concentration to the concentration of the phosphate; (2) determining the boiler cycles value by adding an inert blowdown tracer to the boiler water at a known rate and determining the concentration of the blowdown tracer in the blowdown; (3) determining the blowdown pH value; (4) providing the data defining at least the phosphate-feed rate value, the boiler cycles value, and the blowdown pH value to a control center; (5) optionally maintaining the alkalinity source feed rate constant or providing the data defining the alkalinity source feed rate to the control center; wherein the control center directs at least one responsive adjustment of the phosphate feed to the boiler, the alkalinity source feed to the boiler, and/or the blowdown rate when a sodium to phosphate mole ratio in the boiler water strays from the target mole ratio, wherein the responsive adjustment directed by the control center changes the sodium to phosphate mole ratio in the boiler water in the direction of regaining the target sodium to phosphate mole ratio in the boiler water.
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