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    • 2. 发明公开
    • Boiler system pH/phosphate program control method
    • 系统zur Regelung eines Kessels nach einem PH / phosphat-Programm。
    • EP0640747A1
    • 1995-03-01
    • EP94113074.2
    • 1994-08-22
    • NALCO CHEMICAL COMPANY
    • Avallone, Stanley C.Webb, John R.Eisner, Ian E.Fowee, Roger W.
    • F01K21/06F22B37/56G01N33/18C23F11/08G05D21/02
    • G05D21/02C23F11/184F22B37/565F22D11/006G01N33/18G01N33/1826Y02A20/206
    • 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.
    • 在锅炉水系统中的pH /磷酸盐程序是通过以下方式来控制的:(1)通过向含有磷酸盐的磷酸盐进料流中加入磷酸盐给料锅炉中的磷酸盐进料流量,以已知比例 测定磷酸盐进料流中磷酸盐进料示踪剂的浓度,并将磷酸盐进料示踪剂浓度与磷酸盐浓度相关联; (2)通过以已知的速率向锅炉水添加惰性排污示踪剂来确定锅炉循环值,并确定排污示踪器在排污中的浓度; (3)确定排污pH值; (4)向控制中心提供至少定义磷酸盐供给速率值,锅炉循环值和排污pH值的数据; (5)可选地保持碱度源进料速率恒定或向控制中心提供将碱度源进料速率定义的数据; 其中所述控制中心在所述锅炉水中的钠与磷酸盐摩尔比从所述目标摩尔比流失时,将所述磷酸盐进料的至少一个响应调节指向所述锅炉,所述锅炉的碱度源进料和/或所述排放速率, 其中由控制中心引导的响应调节将锅炉水中的钠与磷酸盐摩尔比在锅炉水中重新获得目标钠与磷酸盐摩尔比的方向。