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二氧化硫监测的重要性及监测方法

发布时间:2021/2/23 10:45:41    作者:蓝居智能科技    浏览次数:50

ERYANGHUALIUBEIGONGRENWEISHIDAQIZHONGZUIZHONGYAODEFUSHIXINGQITI,NENGJIASUDUOSHUJINSHUDEFUSHIGUOCHENG,WOGUOSHISHIJIESHANGZUIDADEMEITANSHENGCHANGUOHEXIAOFEIGUO,ERYANGHUALIUWURANSHIFENYANZHONG,BUFENDIQUDAQIZHONGDEERYANGHUALIUHANLIANGCHAOGUOLEHUANJINGRONGLIANGDE60%。YINCI,BIXUDUISO2JINXINGJIANCE,BINGJIANLIZHUNQUELINGMINDECELIANGFANGFA。

什么是二氧化硫?

ERYANGHUALIU(SO2)SHIWUSEWUWEIDEFUSHIXINGQITI,YOUCIJIXINGQIWEI,KEYIJIASUDADUOSHUJINSHUDEFUSHI。ZAI PM2.5CUNZAIDETIAOJIANXIA,YALIUSUANZAIRONGYEZHONGRONGJIE,ZAICITIAOJIANXIAYALIUSUANBEIYANGHUA,ZAIZHUANHUACHENGLIUSUAN。ZAICHUANTONGYIYISHANG,ZHEISHISUANYUDEQIYUAN。

二氧化硫是怎样产生的?

ERYANGHUALIUTONGCHANGSHIZAIKONGQIZHONGRANSHAOMEIHESHIYOUSUOCHANSHENG,YINWEIMEIHESHIYOUBENLAIJIUHANYOULIUYUANSU。YINCIERYANGHUALIUHUITONGGUOGONGYERANSHAO,SHENGHUORANMEI,QICHEWEIQIDENGQINGKUANGCHANSHENG。CHURENWEIYINSUWAI,HUOSHANPENFAHAIHUICHANSHENGDALIANGDEERYANGHUALIU。

二氧化硫对空气的危害

DANGKONGQIZHONGDEERYANGHUALIUNONGDUCHAOGUO0.5 ppmSHI,KENENGHUIDUIRENTIZAOCHENGYINGXIANG。

DANGKONGQIZHONGDEERYANGHUALIUNONGDUCHAOGUO1 ppmSHI,RENTIJIUHUIGANSHOUDAOYIXILIEDECIJIXIANXIANG。

DANGKONGQIZHONGDEERYANGHUALIUNONGDUZAI400~500 ppmSHI,RENTIJIUHUICHUXIANKUIYANG,FEISHUIZHONG,SHENZHIFASHENGZHIXI。

DANGKONGQIZHONGDEERYANGHUALIUNONGDUCHAOGUO0.21 ppm,JIEHEYANCHENNONGDUCHAOGUO0.3 mg/LSHI,KEZENGJIAHUXIDAOJIBINGDEFABINGLV,SHIMANXINGJIBINGXUNSUEHUA。

CIWAI,ERYANGHUALIUHAIKEYANGHUASHENGCHENGLIUSUANWUHUOLIUSUANYANQIRONGJIAO,TAYESHIHUANJINGSUANHUADEZHONGYAOQIANQUWUZHI。

二氧化硫监测的必要性

ERYANGHUALIUJIANCESHIJIANCEHUANJINGKONGQIZHILIANGDEYIXIANGZHONGYAOZHIBIAO。YOUYUWOGUOSHIMEITANSHENGCHANGUOHEXIAOHAOGUO,YINCIZAIDAQIZHONGERYANGHUALIUHANLIANGCHAOGUOHUANJINGRONGLIANGDE60%DEQINGKUANGXIA,DADUOSHUDIQUDOUCUNZAI。YINCI,JIANLIYITAOWANZHENGDEERYANGHUALIUZAIXIANJIANCEXITONGSHIBIJIAOBIYAODE,TANENGZHANGQI、YOUXIAODIJIANCEHEGUANLIBEIJIANCEDIQUDEERYANGHUALIUHANLIANG,SHIDAQIWURANZHILIDEZHONGYAOYIJU。

二氧化硫监测方法

液吸收法

传统的SO2采集方法是有动力的溶液吸收法,根据选用吸收液的不同,后续采用的分析方法有分光光度法、电化学法、色谱法、化学发光法以及毛细管电泳等,各种分析方法各有所长。金属的大气腐蚀是一个长期累积的过程,了解环境中SO2在一定时间内的累积和变化情况对分析金属的大气腐蚀行为是非常必要的。溶液吸收法因为吸收液的稳定性和体积的限制,采样时间不能过长,一般在1 h 左右,采样分析结果体现的是短期内大气中SO2的瞬时浓度。由于溶液吸收法吸收液稳定性的限制,采样结束后要尽早对采样结果进行分析,因此,国内主要暴晒场不仅配有溶液吸收采样装置,而且配备有化学分析设备和专业技术人员,以便定期对暴晒场大气环境中的SO2进行采集分析。随着工业的发展,材料应用领域不断变化,越来越多的应用环境并不适于配备专业的采样分析设备和专业技术人员。这些都显现出溶液吸收法的局限性。被动采样法

BEIDONGCAIYANGQIBUYONGRENHEDIANYUANHUOCHOUQIDONGLI,SUOYIYOUCHENGWEIWUBENGCAIYANGQI。JIANGCAIYANGQIFANGZHIYUSHIYANHUANJINGZHONGDUISO2JINXINGBEIDONGXIFU,YIBANCAIYANGSHIJIANWEI1 GEYUE。CAIYANGJIESHUHOUDUICAIYANGQISHANGXIFUDESO2JINXINGFENXI,FENXIJIEGUOFANYINGLECAIYANGSHIJIANNEISHIYANHUANJINGZHONGSO2DECHENJILV。GB/T19292.3—2003《JINSHUHEHEJINDEFUSHIDAQIFUSHIXINGWURANWUDECELIANG》GUIDINGLEZAIJIANXINGBIAOMIANSHANGQUEDINGERYANGHUALIUCHENJILVHEYONGERYANGHUAQIANQUEDINGERYANGHUALIUZAILIUSUANYANSHOUJIPANSHANGCHENJILVDEFANGFA。 

在线监测

在电厂、石化等重污染行业,设备在运行过程中需要了解其所处环境的腐蚀性和变化情况,以便及时发现问题并采取必要的防腐蚀措施。为此,建立了一套SO2在线监测系统,实时监测设备所处环境SO2的变化情况,以便于在正常运行状态下有效监测设备的腐蚀速率。蓝居环境监测系统针对室内、户外二氧化硫污染情况定制不同级别的监测传感器,它通过抽取方式或直接测量方式实时、连续地测定固定污染源排放的各种污染物浓度,其中气体污染物主要包括SO2和氮氧化物。该系统现已广泛应用于各类工业园区及公共商业环境。

JIANYUERYANGHUALIU(SO2)DEWEIHAI,JIANLIZAIXIANJIANCEXITONGDUIRENMENDESHENGCHANHEJIANKANGSHENGHUOSHIFENBIYAO。ZUOHAOHUANJINGKONGQIBAOHUHEHUANJINGKONGQIZHILIGONGZUO,ZAIJINGJIHEGONGYEGAOSUFAZHANDETONGSHI,FANGZHIYINHUANJINGKONGQIWURANZAOCHENGDEWEIHAI。