2023·13技术应用与研究108ModernChemicalResearch当代化工研究2023·13技术应用与研究108ModernChemicalResearch当代化工研究循环水总碱度的控制＊移素鸿（中国石化扬子石油化工有限公司江苏210048）摘要：循环水总碱度是循环水结垢的一个重要控制指标，正常循环水总碱度控制在300～450mg/L。总碱度是指循环水中所含能与强酸发生中和反应的全部物质含量，主要由循环水中的盐类形式组成，此类物质与水中的Ca2+、Mg2+离子产生化学反应进而沉淀结垢，循环水中总碱度过高，会导致换热器表面结垢严重，影响换热效果，增加装置能耗。本文主要介绍循环水总碱度的控制，通过采用浓缩倍数、排污量和加酸等控制方法，并且结合生产实际情况，分析了循环水总碱度的优化方法，指出总碱度的控制不仅能直接影响阻垢缓蚀效果，还与循环水系统的节水减排和节约能耗等密切相关。关键词：循环水；碱度中图分类号：TQ文献标识码：ADOI：10.20087/j.cnki.1672-8114.2023.13.036ControlofTotalAlkalinityofCirculatingWaterYiSuhong(SinopecYangziPetrochemicalCo.,Ltd.,Jiangsu,210048)Abstract：Thetotalalkalinityofcirculatingwaterisanimportantcontrolindexforscalingofcirculatingwater,andthetotalalkalinityofnormalcirculatingwateriscontrolledwithin300～450mg/L.Totalalkalinityreferstothecontentofallsubstancescontainedincirculatingwaterthatcanneutralizeandreactwithstrongacid,mainlycomposedofsaltsincirculatingwater.SuchsubstancesreactwithCa2+andMg2+ionsinwatertoprecipitatescale.Thetotalalkalinityofcirculatingwateristoohigh,whichwillleadtoseriousscaleformationonthesurfaceofheatexchanger,affectingtheheattransfereffectandincreasingtheenergyconsumptionofthedevice.Thispapermainlyintroducesthecontrolofthetotalalkalinityofcirculatingwater,andanalyzestheoptimizationmethodofcirculatingwaterqualitybyusingthecontrolmethodssuchasconcentrationratio,dischargeamountandacidaddition,andcombiningwiththeactualproductionsituation.Itpointsoutthatthecontroloftotalalkalinitycannotonlydirectlyaffecttheeffectofscaleandcorrosioninhibition,butalsoiscloselyrelatedtothewatersaving,emissionreductionandenergysavingofcirculatingwatersystem.Keywords：circulatingwater；alkalinity循环水是化工装置的重要组...
