即时比分波胆

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详细分析金属转子流量计的选型与使用方法

发布日期:2016-10-22 11:00:04  来源:  作者:  浏览次数:
【导读】:在中型厂氧气计量系统中,金属转子流量计已稳定运行数月,取得了良好的测量效果。下面就金属转子流量计的特点及选型与使用问题做一简述。......

在我厂能源动力的厂际计量中,一次检测元件基本以孔板为主,由于某些用户用量较小,一直存在着小信号无法准确计量的问题。为解决这一问题,我们开始尝试使用三畅仪表生产的金属转子流量计即时比分波胆作为小流量计量的一次检测元件,先后在特钢厂氩气计量系统、中型厂氧气计量系统和机械厂氧气计量系统中应用,其中在中型厂氧气计量系统中,金属转子流量计已稳定运行数月,取得了良好的测量效果。下面就金属转子流量计的特点及选型与使用问题做一简述。

      YI、JINSHUZHUANZILIULIANGJIDECELIANGYUANLIJITEDIAN

      JINSHUZHUANZILIULIANGJIDECELIANGBUFENYOUKONGBANHEZHUIXINGFUZIZUCHENG,DANGLIUTIXIANGSHANGLIUJINGGUANZISHI,ZHUIXINGFUZIXIANGSHANGYIDONG,ZAIMOUYIWEIZHIDADAOPINGHENG,CISHIFUZIYUKONGBANDEHUANXIBAOCHIYIDING,ERHUANXIMIANJIYUFUZISHANGSHENGGAODUCHENGZHENGBI,JIFUZIDEMOUYIGAODUDAIBIAOZHELIUGUOLIULIANGDEDAXIAO,FUZISHANGXIAYIDONGSHI,YICIOUHEDEXINGSHICHUANDIDAOWAIBUZHISHIQI,SHIZHISHIQIDEZHIZHENGENSUIFUZIDEWEIYI,BINGJIEZHUTULUNBANSHIZHIZHENXIANXINGDIZHISHILIULIANGDEDAXIAO。

即时比分波胆      TEDIAN:JINSHUZHUANZILIULIANGJIJIEGOUJIANDAN,GONGZUOKEKAO,SHIYONGFANWEIGUANG,LIANGCHENGBIGAO,YIBANWEI10:1。

即时比分波胆      ER、JINSHUZHUANZILIULIANGJIDEXUANXING

      JINSHUZHUANZILIULIANGJIDANGCELIANGYETISHI,YIBANYIBIAOZHUNZHUANGTAIXIA(20℃)SHUILAIBIAOZHUKEDU;CELIANGQITISHI,YIBIAOZHUNZHUANGTAI(20℃,JUEYA0.1013MPa)XIAKONGQIBIAOZHUKEDU。SUOYI,DANGDUIMOUYICELIANGLIUTIJINXINGYIBIAOXUANXINGSHI,YINGJIANGQILIULIANGFANWEIHUANSUANCHENGBIAOZHUNZHUANGTAIXIASHUIHUOKONGQILIULIANG,RANHOUGENJUHUANSUANHOUDELIULIANGFANWEIDUIZHAOJINSHUZHUANZILIULIANGJIDEBIAOZHUNKEDUJINXINGXUANXING。

      XIAMIANYIJIXIECHANGYANGQIJILIANGXITONGZHONGMAOHANCHEJIANYANGQIYONGLIANGWEILISHUOMING。YUANSHISHUJURUXIA:

即时比分波胆      GUANJING:ф70×5;FEICHANGDAYONGYANGLIANG:110m3/h;FEICHANGXIAOYONGYANGLIANG:10m3/h;GONGZUOYALI:1.3MPa;GONGZUOWENDU:30℃;DANGDIPINGJUNDAQIYA:0.1MPa。

即时比分波胆      JISUAN:

      (1)YANGQIMIDU

      BIAOKUANGXIA:ρ20=1.331kg/m3

即时比分波胆      GONGKUANGXIA:

即时比分波胆      ρ1=ρ20×(P1T20/PNT1Z)=1.331×{(1.3+0.1)×(273.15+20)/[0.1013×(273.15+30)×0.992]}

即时比分波胆          =17.93kg/m3


      (2)实际流量:

      Qs=Q20ρ20/ρ

      Qsmax=Q20maxρ20/ρ1=110×1.331/17.93=8.166

即时比分波胆      Qsmin=Q20minρ20/ρ1=10×1.331/17.93=0.742

      (3)由金属转子流量计实际使用流体状况下的流量修正公式:

QQ截图20161022111424.jpg

      QNmax=Qsmax/0.2696=8.166/0.2696=30.29

即时比分波胆      QNmin=Qsmax/0.2696=0.742/0.2696=2.75

即时比分波胆      SHIZHONG:ZS(ZSN)WEIBEICEQITIZAIBIAOZHUNZHUANGTAI(GONGZUOZHUANGTAI)XIAYASUOXISHU(YIBANQINGKUANGZS≈ZSN);QsWEIGONGKUANGXIAYANGQIDESHIJILIULIANG;QNWEIBIAOKUANGXIAKONGQIDESHIJILIULIANG;ρNWEIBIAOKUANGXIAKONGQIDEMIDU(1.293 kg/m3);PNWEIBIAOZHUNDAQIYA;TNWEIBIAOZHUNWENDU293.15 K;ρSNWEIBIAOKUANGXIAYANGQIDEMIDU(JIρ20);PsWEIYANGQISHIJIGONGZUOYALI(JIP1);TsWEIYANGQISHIJIGONGZUOWENDU(JIT1)。

即时比分波胆      DUIZHAOJINSHUZHUANZILIULIANGJICHANPINDEXUANXINGSHUOMINGSHU,XUANLZDH-25(3.5~35)FEICHANGHESHI。

      SAN、ERCIBIAOLIULIANGSHANGXIANDESHEDING

即时比分波胆      HAISHIYIMAOHANCHEJIANYONGYANGLIANGWEILI,XUANYONGDEERCIBIAOWEIJINANZHONGHUANZIDONGHUAYANJIUSUOSHENGCHANDEBUCHANGSHIZHINENGLIULIANGJISUANYI。ZHONGHUANBIAOXUSHEDINGDECANSHUYOU:FH、PH、Ph、Ps、CH、Ch、Cs。

即时比分波胆      QILIULIANGSHANGXIANFHYINGWEIJINSHUZHUANZILIULIANGJIKEDUSHANGXIANSUODUIYINGDEBIAOZHUNZHUANGTAIXIADEYANGQILIULIANG,YINWEIJINSHUZHUANZILIULIANGJIDEKEDUWEIBIAOZHUNZHUANGTAIXIAKONGQIBIAOZHU,SUOYIBIXUJIANGQIZHUANHUANWEIBIAOZHUNZHUANGTAIXIAYANGQILIULIANG。

      YOU Q20=Qsρ1/ρ20

      YOU Qs=O.2696QN

      BIAOKUANGXIAYANGQILIULIANG:

      Q20=0.2696QNρ1/ρ20

      Q20max=0.2696QNSHANGρ1/ρ20=0.2696×35×17.93/1.331=127.11

即时比分波胆      Q20min=0.2696QNXIAρ1/ρ20=0.2696×3.5×17.93/1.331=12.711

      QNSHANG(QNXIA):JIJINSHUZHUANZILIULIANGJIANBIAOZHUNZHUANGTAIXIAKONGQIBIAODINGDELIULIANGSHANG(XIA)XIAN。

即时比分波胆      ANSUOXUANXINGHAOWEILZDH-25(3.5~35)DEJINSHUZHUANZILIULIANGJI,YANGQIDECELIANGFANWEIWEI12.711m3/h~127.11m3/h。JIBENFUHESUOTI1 1m3~110m3DECELIANGYAOQIU。

      SI、JINSHUZHUANZILIULIANGJIZAIANZHUANGJISHIYONGGUOCHENGZHONGDEZHUYISHIXIANG

      (1)流量计必须垂直安装,所测流体自下而上经流量计,进出口保证有5倍仪表口径的直管段,对于新安装的管路,流量计安装前应将管道冲洗干净。
      (2)为便于检修和更换流量计,在仪表安装时需接旁道管路。
      (3)在流量计上游应安装阀门,在下游5~10倍仪表口径处安装流量调节阀。对于小口径仪表在上游应安装过滤器,若被测介质中含有磁性物质,则应在流量计前安装磁过滤器。
      (4)当被测介质较脏时,应及时清洗管子与浮子。
即时比分波胆       (5)金属转子流量计的测量准确度一般为2.5级,当要求测量准确度较高时,则不宜选择金属转子流量计。

即时比分波胆      WU、JIESHUYU

      金属转子流量计的使用,解决了我厂长期以来小流量无法准确计量的难题,使我厂的能源计量工作更加完善,也为各二级厂矿的成本核算提供了更加可靠的结算数据

ZHUMING:HUAIANSANCHANGYIBIAOWENZHANGJUNWEIYUANCHUANG,ZHUANZAIQINGBIAOMINGBENWENDIZHIhttp://smmzz.com/

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