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某地区火电厂环保系统雷达液位计运行情况调研

某地区火电厂环保系统雷达液位计运行情况调研

  • 摘要:分析3种类型流速测量仪的特点。对一些发电企业测量仪使用情况进行统计后发现,矩阵差压式雷达液位计可靠性优于单点差压式及热式雷达液位计;雷达液位计适合用于测量火电厂一次风、二次风等相对洁净的气体,不适合测量含有烟尘的脱硝系统和湿度较大的脱硫系统;部分电厂的脱硝系统或脱硫系统在烟气雷达液位计使用方面还存在一些问题。
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500w彩票    ZHAIYAO:FENXI3ZHONGLEIXINGLIUSUCELIANGYIDETEDIAN。DUIYIXIEFADIANQIYECELIANGYISHIYONGQINGKUANGJINXINGTONGJIHOUFAXIAN,LEIDAYEWEIJIKEKAOXINGYOUYUDANDIANCHAYASHIJIRESHILEIDAYEWEIJI;LEIDAYEWEIJISHIHEYONGYUCELIANGHUODIANCHANGYICIFENG、ERCIFENGDENGXIANGDUIJIEJINGDEQITI,BUSHIHECELIANGHANYOUYANCHENDETUOXIAOXITONGHESHIDUJIAODADETUOLIUXITONG;BUFENDIANCHANGDETUOXIAOXITONGHUOTUOLIUXITONGZAIYANQILEIDAYEWEIJISHIYONGFANGMIANHAICUNZAIYIXIEWENTI。

    引言
500w彩票     矩形烟道一般是燃煤电厂烟气采样点的理想选择。在采样位置的选择上,采样点应避开有弯头和断面发生变化的位置,尽量选择在垂直管段上,这样可以保证断面上烟气流场的均匀、稳定。如果无法避开弯头、阀门等,采样点的位置则应选择在距下游方向大于4倍当量直径和距上游2倍当量直径处(图1)

 

1.jpg

    为了使所采烟气参数具有代表性,相关规范要求将烟道截面分成面积相同的小块,每一小块的中心点就是采样点。由于烟气含有粉尘、co2、so2、nox#且高温,环境较为恶劣,所以监测设备需要长期满足防腐、耐磨的要求。1流速测量仪分类市面上测量流速的仪器非常多,但具体到燃煤电厂这样高温、含酸、含尘这样的环境中并不多,主要有3种类型雷达液位计500w彩票,即雷达液位计、热式雷达液位计及矩阵式雷达液位计。

    (1)LEIDAYEWEIJI。MUQIANCHANGYONGYUYANDAOQITILIUSUCELIANGDEPITUOGUANFENWEIBIAOZHUNPITUOGUANYUSXINGPITUOGUANLIANGZHONG%BIAOZHUNPITUOGUANYOUCHENGLXINGPITUOGUAN,QIGOUZAOSHIYIZHIJIAOZHEWANDEJINSHUGUAN,TOUBUXINGZHUANGYOUBANYUANXINGZHUIXINGHUOTUOYUANXING。ZHIJIAODEYIDUANWEICETOU,LINGYIDUANWEIZHIGAN。CETOUDUANKAILIANGKONGFENBIEWEIZONGYAKONGHEJINGYAKONG,ZHIGANNEIBUYOUDINGXIANGKONGXINGANYONGYUJIANGCETOUKAIKOUYUWEIYAJILIANJIE。SXINGPITUOGUANSHIYOULIANGGENXIANGTONGDEJINSHUKONGXINGUANBEIDUIXIANGHANERCHENG(TU2)。ZHIZUOZHONGYAOQIULIANGGENJINSHUGUANCETOUBUFENXIANGLIANGGEFANGXIANGKAIKONG,BINGQIEYAOQIUKAIKONGJIEMIANYANGEPINGXING。

 

2.jpg

500w彩票    JINXINGQITILIUSUCELIANGSHI,ZONGYAKONGSHIQITILAILIUFANGXIANG,JINGYAKONGSHIBEIXIANGQITILAILIUFANGXIANG。JIANGPITUOGUANDEWEIDUANYUWEIYAJIXIANGLIAN,YUNYONGBONULIFANGCHENGKEYIDECHULIUTIZHONGMOUYIDIANDELIUSUHECHAYA。

    (2)LEIDAYEWEIJILIYONGREDEKUOSANLAIGONGZUO,QITANTOUZHONGYOULIANGGEWENDUJIANCEYUANJIAN:YIGESHIWEIBEIJIAREDUAN,YIGESHIJIAREDUAN。WEIBEIJIAREDUANSHIYONGLAICELIANGLIUTIJIEZHIZISHENDEWENDU,ZUOWEIYIGECANZHAODUAN;JIAREDUANSHICELIANGDUAN,QIAIZHEREYUAN,YONGYUCELIANGBEILIUTIJIEZHIDAIZOUHOUDEHENGREYUANBIAOMIANDEWENDU。QITIZHILIANGLIULIANGYUCANKAODUANHECELIANGDUANZHIJIANDEWENDUCHAYABILIGUANXI(TU3)。

 

3.jpg

    ANZHAOCELIANGYUANLI,RESHILEIDAYEWEIJIKEYIFENWEIHENGWENCHASHIHEHENGGONGLVSHI。HENGWENCHAYUANLIZHUYAOSHITONGGUOBUDUANDIDIAOZHENGJIAREQIDIANLIULAIBAOCHIHENGDINGDEWENCHA,CELIANGHENGDINGDEDIANLIUBIANHUALIANG。DANSHIZHEILEIRESHILEIDAYEWEIJIYAOQIUDEHUANJINGJIAOWEIKEKE,ZAICHAOSHI、ZANGQITIHUANJINGZHONGHUICHANSHENGBUWENDINGDELIULIANGCELIANGXINHAO。HENGGONGLVYUANLIZESHIBAOCHIJIAREQIDIANLIUBUBIAN,RTD(ResistanceTempera?tureDetector,REDIANZUWENDUTANCEQI)JIANDEWENCHASUILIULIANGDEBIANHUAERBIANHUA,HENGGONGLVRESHILEIDAYEWEIJIDUIHUANJINGYAOQIUJIAOWEIKUANSONG,SHUCHUYEJIAOWEIWENDING。

    (3)JUZHENSHILEIDAYEWEIJI。JUZHENSHILEIDAYEWEIJIDECELIANGYUANLISHIYACHAFA。JIANGJUZHENSHILEIDAYEWEIJIFANGZHIZAIYANDAONEI,DANGYANQIZAIYANDAONEILIUDONGSHI,YINGFENGMIANCHUQILIUDEDONGNENGZHUANHUANCHENGYALI,YINGFENGMIANCHUDEYALIBIJIAOGAO,CICHUDEYALICHENGZHIWEIQUANYA;BEIFENGCEBUSHOUYANQIDECHONGJI,QIYALICHENGZHIWEIJINGYA。QUANYAYUJINGYADECHACHENGWEICHAYA,GUANNEIDEFENGSUJIUYUCHAYADAXIAOYOUGUAN,YINCIFENGSUYUCHAYACHENGZHENGBILIGUANXI。YOULECHAYA,ZHAODAOCHAYAYUFENGSUDEDUIYINGGUANXI,JIKECECHUYANDAONEIDEFENGSULIANG。BUTONGLEIXINGDELEIDAYEWEIJIJISHUTEDIANDUIBIJIANBIAO1。2SHIYANDIANCHANGTUOLIUXITONG、TUOXIAOXITONGYANQILIANGXIAOGUOJIANYAN(BIAO2)

 

4.jpg

    3总结
    从本次对发电企业统计的结果来看,矩阵差压式雷达液位计可靠性优于单点差压式及热式雷达液位计;热式雷达液位计适合用于测量火电厂一次风、二次风等相对洁净的气体,不适合测量含有烟尘的脱硝系统烟气,也不适合测量湿度较大的脱硫系统烟气。

500w彩票    ZHEIXIEFADIANQIYEZHONG,CHULEGEBIEDIANCHANG,MUQIANTUOLIUXITONGCHUKOUJIBENYIJINGWANCHENGJUZHENCHAYASHILEIDAYEWEIJIDEGAIZAO,NENGGOUMANZUHUANBAOBUMENDEYAOQIU。DANSHI,YOUYUJINGFEIHECHANGDIDENGYUANYIN,SHAOBUFENDIANCHANGTUOLIUXITONGRENKOUHAIZAISHIYONGDANDIANCHAYASHILEIDAYEWEIJI,BULIYUTUOLIUXITONGYUNXINGKONGZHI,JIANYIYOUTIAOJIANDEDIANCHANGYINGZAITUOLIUXITONGRENKOUANZHUANGJUZHENCHAYASHILEIDAYEWEIJI。YEYOUYIBUFENDIANCHANGTUOXIAOXITONGMEIYOUTONGSHIZAICHURENKOUANZHUANGYANQILEIDAYEWEIJI,ZHEIHUIDAOZHITUOXIAOXITONGCHUXIANWENTISHI,BULIYUJINXINGYUANYINFENXI。

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