某火电厂中水处理药剂调整及分析

Adjustment and Analysis of Reclaimed Water Chemicals in a Thermal Power Plant

中水目前作为火力发电厂工业用水的重要来源之一,其水质与机组安全稳定运行密切相关。为解决某火电厂中水水质差、硬度高的问题,通过烧杯试验调整中水处理药剂的投加量及投加顺序,分析相关水质指标得出结论:药剂在最佳投加比下,总硬度和钙硬去除率分别为78.7%,70.1%左右,碱度去除率在88.9%左右,浊度去除率可达86%,能够有效提升中水处理效率。混凝-澄清处理按照混凝剂+石灰+助凝剂的加药顺序,取得较好的混凝效果。计算得出水处理量为1000 m^(3)/h的澄清池排泥量约为14.44 m^(3)/h,干泥渣产量约为287 kg/h,为其中水处理投加药剂方式提供理论参考数据。

As one of the important sources of industrial water in thermal power plants,the quality of reclaimed water is closely related to the safe and stable operation of the electric power plant units.In order to solve the problem of poor water quality and high hardness in a thermal power plant,the authors adjusts the dosage and dosage order of water treatment chemicals through beaker experiments,and analyzes the relevant water quality indexes to conclude that:under the optimal dosage ratio of chemicals,the removal rate of total hardness and calcium hardness is about 78.7%and 70.1%respectively,the removal rate of alkalinity is about 88.9%,and the removal rate of turbidity is up to 86%,which can effectively enhance the treatment efficiency of water.Coagulation-clarification treatment in accordance with the coagulant+lime+coagulant dosing order achieve better coagulation effect.Calculated water treatment capacity of 1000 m^(3)/h clarifier discharge of about 14.44 m^(3)/h,dry sludge production of about 287 kg/h,providing reference for the water treatment dosing method.