锅炉给水中杂质对炉水pH值的影响研究  

The impurity in feedwater how to affect the boiler water pH value

作　　者：朱志平[1] 汪红梅[1] 周琼花[1] 

机构地区：[1]长沙理工大学化学与环境工程系,湖南长沙410076

出　　处：《电力科学与技术学报》2007年第1期56-60,共5页Journal of Electric Power Science And Technology

基　　金：湖南省科技厅科技攻关项目(02GKY3084)

摘　　要：锅炉给水中的杂质会影响炉水pH值,而炉水pH值是表征锅炉水化学优劣的关键性指标.对于一个采用amg/L Na3PO4+bmg/L NH3+cmg/L NaOH碱化剂的炉水控制体系,主要讨论在炉水中存在dmg/L H2SO4+emg/L CH3COOH+fmg/L CO2+gmg/L SiO24种杂质时炉水pH值的计算方法,得到通用的pH值计算表达式;并以炉水平衡磷酸盐处理工况为例,计算这4种杂质在0-1 mg/L变化时,其单独或联合作用对炉水pH值的具体影响程度,以6幅图形展示计算结果,该结果可应用于炉水pH值的实际控制.The pH value is a key index for boiler water quality. The feedwater impurity has influence in boiler water pH value. A boiler water controlling system with basifier a mg/L Na3PO4 ＋ b mg/L NH3 ＋ c mg/L NaOH is investigate in the paper. Several calculate methods are discussed and the precision pH value calculating equation is proposed for a cycle chemistry system that has seven changing parameters coexisting together, i. e. a mg/L Na3PO4 ＋ b mg/L NH3 ＋ c mg/L NaOH ＋ d mg/L H2SO4 ＋ e mg/L CH3 COOH ＋ fmg/L CO2 ＋ g mg/L SiO2. As an example of equilibrium phosphate treatment, the pH value are obtained and showed in graphics with the four kinds of impurity changing from 0 to 1.0 mg/L. The calculating results can be used in practical boiler water pH value control.

关 键 词：给水 炉水pH值 杂质 平衡磷酸盐处理 

分 类 号：TK223[动力工程及工程热物理—动力机械及工程]