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蒸汽测量严重带水对涡街蒸汽流量表的影响

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蒸汽测量严重带水对涡街蒸汽流量表的影响

发布日期:2018-11-10 作者:精测测控仪表 点击:

蒸汽测量严重带水对涡街蒸汽流量表的影响

WOJIEZHENGQILIULIANGBIAOZAIZHENGQILIULIANGCELIANGZHONGSHIYONGFEICHANGPUBIAN,GANZHENGQIZAIZHANGJULISHUSONGGUOCHENGZHONG,HUIYINRELIANGSUNSHIERCHUXIANBUFENNINGJIE,DAOZHIZHENGQIGANDUJIANGDI,BIANCHENGSHIZHENGQI。

蒸汽管道流量计2元彩票是一种新型流量。它采用了新一代流量传感器,具有其它流量计不可兼得的许多优点,与国内外同类相比具有许多新特点。它是根据流体中插入物体所产生的旋涡个数与流速成比例制成的。然后再把旋涡产生压力的变化作为应力的变化而进行检出,输出与流量成正比的4~20mA电流脉冲或直流电流输送到接收仪表。

 AK-LUGB蒸汽流量计的基本原理是卡门涡街原理,即“涡街旋涡分离频率与流速成正比”。变送器流通本体直径与的公称口径基本相同。如图一所示,流通本体内插入有一个近似为等腰三角形的柱体,柱体的轴线与被测介质流动方向垂直,底面迎向流体。 
当被测介质流过柱体时,在柱体两侧交替产生旋涡,旋涡不断产生和分离,在柱体下游便形成了交错排列的两列旋涡即“涡街”。理论分析和实验已证明,旋涡分离的频率与柱侧介质流速成正比。

XUANWOJIAOCUOFENLI,ZAIZHUTILIANGCEJIZHUTIHOUMIANDEWEILIUZHONGCHANSHENGMAIDONGDEYALI,SHEZAIZHUTINEIBU(HUOHOUMIAN)DEJIANCETANTOUSHOUDAOZHEIZHONGWEIXIAODEMAIDONGYALIDEZUOYONG,SHIMAISHEZAITANTOUNEIDEYADIANJINGTIYUANJIANSHOUDAOJIAOBIANYINGLIERCHANSHENGJIAOBIANDIANHEXINHAO。GAIXINHAOJINGFANGDAQISHANGDEDIANHEBIANHUAN、FANGDA,LVBOXIANFUHECHUFAZHENGXINGCHULIHOU,SHUCHUPINLVYUXUANWOFENLIPINLVXIANGTONGDEFANGBODIANYAMAICHONGXINHAO。GAIXINHAOZAISONGDAOJIUDIXIANSHIYI,CHUANGANQISHUCHUDEMEIYIGEMAICHONGJIANGDAIBIAOYIDINGTIJIDEBEICELIUTI。YIDUANSHIJIANNEIDESHUCHUZONGMAICHONGSHU,JIANGDAIBIAOZHEIDUANSHIJIANNEILIUGUOCHUANGANQIDELIUTIZONGTIJI。

QQ截图20171106160005.jpg

MUQIANSHIYONGZHENGQILIULIANGBIAODOUSHIZAIDANXIANGLIUDONGZHUANGTAIXIAPINGDINGQICELIANGXINGNENG,XIANZAIHAIMEIYOUYIDANXIANGLIUBIAODINGDELIULIANGJIYONGLAICELIANGLIANGXIANGLIUSHIXITONGBIANHUADEPINGDINGBIAOZHUN。DANSHI,LIANGXIANGLIUSHIKEGUANCUNZAIDE,TADUILIULIANGCELIANGDEYINGXIANGYESHIWUFABIMIANDE,JINGUANKUNNANJIAODUO,RENMENHAISHIZAIXIANGFANGSHEFAYANJIUQIDUILIULIANGCELIANGYINGXIANGDEJILI,BINGCAIQUXIANGYINGDEDUICE,TIGAOLIULIANGCELIANGJINGDU。


2  ZHENGQIYANZHONGDAISHUIDUIWOJIEZHENGQILIULIANGJICELIANGJIEGUODEYINGXIANG

RENMENYONGGANDUXLAIMIAOSHUSHIZHENGQIZHONGQIXIANGYUSHIZHENGQIZONGLIANGDEZHILIANGBI,YEYONGSHIDUYLAIDINGYISHIZHENGQIZHONGSHUIDIYUSHIZHENGQIZONGLIANGDEZHILIANGBI。

2元彩票DANGx = 100%SHI,y = 0,ZHEISHIDEZHENGQIWEIGANZHENGQI。DANGx<100 %SHI,y>0,ZHEISHIDEZHENGQIWEISHIZHENGQI。SHIZHENGQIZHONGDESHUIDISHIYEXIANG,ERSHIZHENGQIDEGANBUFENSHIQIXIANG,XIANRAN,SHIZHENGQISHULIANGXIANGLIUTI。

(1)X≥95%SHIDEQINGKUANG

研究人员的研究结果认为,蒸汽干度较高(X≥95%)时,流体表现为均相流动,蒸汽中的小水滴悬浮在气相中,这时,涡街流量计能正常工作。

(2)X<95%SHI

ZHENGQIDEGANDUZAIXIAOYU95%HOURUOJINYIBUJIANGDI,CHULEXUANFUZAIQIXIANGZHONGDEYUE5%(ZHILIANGBI)DESHUIDIWAI,GUOLIANGDESHUIDI。ZAIZHENGQIZHONGDEFENBUJIANGSHIQUJUNYUNXING,TAMENZAIYUANXINGJIEMIANGUANDAOZHONGDELIUDONGZHUANGKUANGGENGJIAFUZA。

① ZAISHUIPINGGUANDAOZHONGDELIUDONG

SHUIPINGGUANZHONGQIYELIANGXIANGLIUDONGJIEGOUTONGQIYELIANGXIANGTIJIBIJILIUDONGSUDUYOUGUAN,ZAIZHENGQIGUANDAOZHONG,YOUYUNINGJIESHUIZAISHIZHENGQIZHONGDETIJIBIBIJINGHENXIAO,SUOYICHANGBIAOXIANWEIFENCENGLIUDONGJIEGOURUTU1(a)SUOSHI,ZHEISHIDECONGSHUIPINGGUANDAODIBUYINCHUDESHUSHUIGUAN,NENGSHOUDAOHENHAODESHUSHUIXIAOGUO。

DANGLIUSUTEBIEGAODESHIHOU,YEHUIBIAOXIANWEIHUANZHUANGLIUDONG,JIGUANBISHANGYOUYEMO,GUANDAOZHONGXINBUFENWEIDAIYEDIDEQIHE,YOUYUSHUIPINGLIUDONGSHIZHONGLIDEYINGXIANGZUOYONG,XIABUYEMOYAOBISHANGBUGUANBIDEHOU,RUTU1(b)SUOSHI。

② ZAICHUIZHISHANGSHENGGUANDAOZHONGDELIUDONG

SHIYANYANJIUZHENGMING[2],ZAICHUIZHISHANGSHENGGUANDAOZHONG,QIYELIANGXIANGLIUDONGDEJIBENJIEGOUYOUXIPAOZHUANGLIUDONGJIEGOU、DANZHUANGLIUDONGJIEGOU、KUAIZHUANGLIUDONGJIEGOU、DAIXIANWEIDEHUANZHUANGLIUDONGJIEGOUHEHUANZHUANGLIUDONGJIEGOU。DANSHIYOUYUNINGJIESHUIZAISHIZHENGQIZHONGDETIJIBIJIAOXIAO,SUOYI

GUOLIANGDESHUIZAISHANGSHENGGUANDAOZHONGDELIUDONGCHANGBIAOXIANWEIHUANZHUANGLIUJIEGOU,RUTU2(b)SUOSHI,DANDANGDAISHUILIANGTEBIEDADEQINGKUANGXIA,YEHUIBIAOXIANWEIDAIXIANWEIDEHUANZHUANGLIUDONGJIEGOU,RUTU2(a)SUOSHI。QIZHONG,XIANWEIZHUANGLIUTIQISHISHILIANCHENGTIAODENINGJIESHUI。

2元彩票③ ZAICHUIZHIXIAJIANGGUANDAOZHONGDELIUDONG

ZAICHUIZHIXIAJIANGGUANDAOZHONG,QIYELIANGXIANGLIUDONGDEJIEGOUYUZUOCHUIZHISHANGSHENGLIUDONGSHIDEJIEGOUHENXIANGSI,DANYOUBUTONG,BUJINLIUDONGFANGXIANGXIANGFAN,ERQIEZAIPINGJUNLIUSUXIANGTONGDEQINGKUANGXIA,CHUIZHIXIAJIANGGUANDAOZHONGYETIDELIUSUBICHUIZHISHANGSHENGGUANDAOZHONGYETIDELIUSUKUAIDEDUO。

ZHEIZHONGHUANZHUANGLIUDONGJIEGOU,RENMENZAININGJIESHUISHUSHUIXIANCHANGHENRONGYIDEDAOZHENGSHI。

2元彩票NINGJIESHUISHUSHUIQIYIBANJUNBINGLIANANZHUANGYIZHIPANGTONGFA,SHUSHUIQIDECHUKOUWANGWANGPEIYOUYIDUANCHUIZHIXIANGXIADEDUANGUAN,RUGUOJIANGSHUSHUIQIGUANBI,GAIYONGZOUPANGTONGSHUSHUI,ZEHUIGUANCHADAOQIYEHUNHEWUCONGCHUIZHIGUANDAOKOUZHONGLIUCHUDEBIAOXIAN,YETIYOUMINGXIANDEFUBIXIANXIANG,DANTONGSHI,QITICONGGUANZHONGYANGPENCHUSHI,YEJIADAIYOUYIXIEYEDI。

④ LIUDONGJIEGOUFENXIDEFUZAXING

SHANGMIANZHISHICULVEDIFENXIDAISHUIDEZHENGQIZAIGUANDAOZHONGLIUDONGSHIDEBIAOXIANG,ERQIEZHIDAOBUTONGDELIUDONGJIEGOUTONGLIUTIDELIUSUHEDAISHUILIANGYOUGUAN。ERYAOJINYIBUNONGQINGCHUZHEIFANGMIANDESHULIANGGUANXIQUESHIKUNNANDE。YINWEIDAOMUQIANWEIZHI,RENMENZAIZHEIFANGMIANZUODESHIYANYANJIUHAIHENSHAO,ERTAMENZHIJIANDEGUANXIYOUSHIJIQIFUZA。

DANSHI,ZHEIXIECULVEDEFENXIDUIWOJIELIULIANGJIDEYIGETEYOUDEXIANXIANG——LOUMAICHONG,NENGTIGONGYIDINGDEBANGZHU。

分体式涡街流量计.jpg

3  WOJIEZHENGQILIULIANGJIDE“LOUMAICHONG”XIANXIANG

2元彩票RENMENHENZAOJIUFAXIANZHENGQIDAISHUIJIAODUOSHI,WOJIELIULIANGJIHUICHUXIAN“LOUMAICHONG”XIANXIANG,JIZAIZHENGQILIUSUPINGWENDEQINGKUANGXIA,WOJIELIULIANGJIYINGYOUYULIUSUCHENGZHENGBIDEWENDINGDEMAICHONGSHUCHU。DANSHIYOUSHIQUEFAXIANYIBIAODESHUCHUMAICHONGQUEMOMINGQIMIAODISHAOLE,CONGJILUDAODESHUCHUMAICHONGZAIERWEIZUOBIAOSHANGDEFENBUQINGKUANGYENENGQINGCHUKANCHU,YINGDANGJINSIJUNYUNFENBUDEMAICHONGQUEZAIMOUYICHUSHAOYIGEMAICHONG,YANZHONGDESHIHOU,SHISHAOLEHENDUOMAICHONG,ZUIYANZHONGDESHIHOUSHIWANQUANMEIYOUMAICHONG。ZHEIKENENGTONGFENBUBUJUNYUNDETIJIJIAODADEYEDIZHUANGJIZAIXUANWOFASHENGTISHANG,YIZHILEWOLIEDEXINGCHENGYOUGUAN。

YOUGUANZHEIFANGMIANDESHIYANYANJIU,SHANGWEIJIANDAOWENXIANBAODAO,DANSHIRENMENZAISHIYONGXIANCHANGYIPENGDAOBUSHAO,ERQIE,CHULIZHEIYIWENTIDEFANGFA,RENMENYEZAOYIZAIYINGYONG。

3.1 GUANYU“LOUMAICHONG”XIANXIANGDESHILIZHIYI

JIANGSUAOKEYIBIAOYOUXIANGONGSIZAIWEIJIANGSUDEYIJIAYAOYEGONGSIZUJIANQUANCHANGZHENGQIJILIANGWANGDEXIANGMUZHONG,PENGDAOLEYIGELINGRENFEIJIEDEGUZHANG,ZHEIGEGUZHANGFASHENGZAIYIGEZHENGQILIULIANGJICELIANGGUOREZHENGQILIULIANGDEXITONGZHONG,ZHEIGEXITONGDEGUANDAOLIANJIERUTU4SUOSHI。

该工厂的锅炉房除了向全厂供应中压过热蒸汽外,还经减温减压系统向全厂供应0.4MPa(g)、160℃低压过热蒸汽。FIQ303就是对这路蒸汽进行计量的蒸汽流量计仪表。


 

 

GAITAOYIBIAOYUQITADUOTAIFENBIAOZUCHENGDEDIYAZHENGQIJILIANGWANG,ZAITOUYUNHOUDEBANNIANNEI,YIZHIYUNXINGZHENGCHANG,ZONGBIAOSHIZHIYUGEFENBIAOZHIHEYEJIBENXIANGFU。ZHEIYIQINGKUANGZAINIANDUTINGCHEDAJIANXIUZHIHOUFASHENGLEBIANHUA,YUANLAIJINCHUPINGHENGDEJILIANGSHUJUCHUXIANLEFUDEGUANSUN,GAICHANGNENGYUANKEGENJUDIYAZHENGQIWANGDESHUJUPINGHENGGUANXIHEGUOLUDENENGLIANGPINGHENGGUANXIZUOCHULEFIQ303ZHISHIPIANDIDEPANDUAN。

笔者在检查了各台仪表之后,发现各台仪表均正常。于是请涡街流量计制造厂上门服务,经检查发现这台DN350的涡街流量计有“漏脉冲”现象存在,在正常的流量范围内,记录到数次如图5所示的输出波形。

2元彩票GENJUZHIZAOCHANGDEJINGYAN,ZHEIZHONGQINGKUANGDECUNZAIKENENGSHIZHENGQIDAISHUIYINQI。

2元彩票NENGYUANKEGONGCHENGSHIFOUDINGWOJIEZHENGQILIULIANGJIANZHUANGCHUZHENGQIDAISHUIDEKENENGXING,LIYOUSHIJIANWENJIANYAXITONGDOUYOUZIDONGDIAOJIELAIBAOZHENGQIYUNXINGCANSHU,YUSHIYISHIMEIYOUJIELUN。YOUGUOYIGEXINGQI,SHITAIYOULEJINYIBUDEFAZHAN。CONGFC6000XINGLIULIANGYANSUANQIZHONGDEHAILIANGCUNCHUQICHAYUEDAODELISHISHUJUBIAOMING,GAILULIULIANGSHIZHIZHUJIANJIANXIAO,SHENZHIYOUSHIJIANXIAODAOLING,ERZHEISHI,QUANCHANGSHENGCHANZHAOCHANGJINXING,ZHENGQIYIDIANBUSHAOYONG。

2元彩票JINYIBUDEJIANCHAJIAODIANZHUYAOJIZHONGZAIZHENGQISHIFOUDAISHUIFANGMIAN。NENGYUANKEZHUYAOQIANGDIAOJIANWENJIANYAXITONGCHUKOUCHUDEWENDUYALICANSHU。JINGCHA,JIANWENQICHUKOUWENDUYALIXIANSHIZHENGQUE。DANSHIBIZHEGENJUFC6000XINGYIBIAOXIANSHIDEWENDUYALISHUJUFENXI,WOJIEZHENGQILIULIANGJIANZHUANGCHUDEZHENGQIDEQUEYIJINRUBAOHEZHUANGTAI,YUSHIYAOQIUDAKAISHUSHUIQIYANZHENG。NENGYUANKERENYUANJIANCHIRENWEISHUSHUIQIBUKENENGPAICHUSHUI,DANWEILESHUOFUYIBIAORENYUAN,HAISHITONGYIDAKAISHUSHUIQIDEQIEDUANFA(TU4ZHONGDEV2)SHIYISHI。

SHUSHUIFADAKAIHOU,DALIANGNINGJIESHUIPENCHU,ERSHIFENZHONGYEWEIPAIGUANG,YUSHIZHENXIANGDABAI。

ZHIYUDALIANGNINGJIESHUISHICONGNALILAIDE,WOMENSUIJIJINXINGLEDIAOCHA。JINGCHAZAIJIANWENQICHUKOUDAOLIULIANGJIZHIJIANZHIYOUYIGENZHUANGYOUFAV1DEGUANDAOYUWAIJIEXIANGTONG,NENGYUANKERENYUANJIESHI,ZHEIGENGUANDAOLIYOUSHUI,DAJIANXIUZHIHOU,V1FAKENENGYOUXIELOU,DAOZHILENGSHUIRUQIN。

ZHEIYISHIQINGDEZUIHOUCHULIFANGFASHIZAICHUANYUEMALUQIANDEGUANDAOZUIDICHU,ZENGSHEYIGESHUSHUIQI,CONGERSHILIULIANGJIHUIFUZHENGCHANGCELIANG。

2元彩票3.2 GUANYU“LOUMAICHONG”XIANXIANGDESHILIZHIER

2元彩票SHANGHAIMOURELIGONGSIXINZENGYIGEREYUANCHANG,GAICHANGSHENGCHANDESHIBAOHEZHENGQI,GUOLUTOUYUNHOUDUIYIGEYUANZAI2GONGLICHUDEYONGHUGONGQI。QIGUANWANGRUTU6SUOSHI。

热力公司怀疑蒸汽流量计不准,因为锅炉房出口的流量计FIQ01稳定显示2.5 t/h左右的流量,而用户端流量计FIQ02显示时有时无,流量最大时也只有0.75 t/h。

 

 

JIANGSUAOKEYIBIAOYOUXIANGONGSIGONGZUORENYUANTONGGUODIANHUAWEIRELIGONGSITIGONGZIXUNFUWU,LEJIEDAO,RELIGONGSIWEILEJIANSHAORELIANGSUNSHI,JIANGYANTUDE31ZHISHUSHUIQIQUANBUGUANDIAO,XIANRANLIUJINGFIQ02YIBIAOCHUDEZHENGQIZHONGHANYOUDALIANGNINGJIESHUI。BIZHEJIANYIJIANGKAOJINYONGHUBIAOJICHUDEJIZHISHUSHUIQIDAKAI,PAIDIAOGUANDAOZHONGDENINGJIESHUI,ZHEIYANGZUOLEZHIHOU,LIULIANGJI1t/h,ZHIYUGAISHIZHITONGFIQ01XIANSHIDE2.5t/hZHIJIANDECHAZHI,YINGGAISHI2GONGLIZHANGDEGUANDAORESUNHAOYINQIDE,RELIGONGSIJIESHOULEZHEIYIJIELUN。


4  DUICE

4.1  X≤95%QINGKUANGXIADEDUICE

4.1.1 DUICE

SHANGMIANSUOSHUX>95%QINGKUANGXIADEBUCHANG,RUGUOBUZUO,JINJINSHIXUANFUZAIZHENGQIZHONGDEJUNYUNFENBUDEXIAOSHUIDIJIBUCHU,DANSHI,ZAIX<95%DEQINGKUANGXIA,RUGUOBUCAIQURENHECUOSHI,CELIANGJIEGUOJIUYOUKENENGDAFUDUPIANDI,SHENZHIMEIYOUSHUCHU。

2元彩票ZAIX<95%DEQINGKUANGXIA,CAIQUCUOSHIDEMUDESHISHILIULIANGJISHIXIANZHENGCHANGCELIANG。CAIQUDECUOSHISHIZAILIULIANGJIQIANCHONGFENSHUSHUI。

SHUSHUISHIFOUCHONGFENDEBIAOZHISHIZHENGQIGUANZHONGSHIFOUPAIDECHUNINGJIESHUI。RUTU8SUOSHIDEPEIZHINENGCONGHOUYIGESHUSHUIQIZHONGDEPAISHUILIANGDEDAOPANDUAN。HOUYIGESHUSHUIQIRUGUOJISHAOYOUSHUIPAICHU,ZEBIAOMINGQIANYIZHISHUSHUIQIYICHONGFENSHUSHUI。

4.1.2 SHUSHUIDIANDEHELIBUZHI

SHUSHUIDIANDEHELIBUZHIDUICHONGFENSHUSHUIYOUGUANJIANXINGDEZUOYONG。ZAITU9(a)SUOSHIDESHILIZHONG,NINGJIESHUIDEBUZHUOKOUTAIXI,YUZHENGQIYIQIGAOSULIUDONGDENINGJIESHUI,KENENGHUIYOUYIBUFENBUBEIBUZHUOKOUSUOSHOUJI,ERLIUDAOXIAYOU。


5  JIESHUYU

① SHIZHENGQIJIUSHUXINGERYANSHILIANGXIANGLIUTI,DANZAISHIDUBUGAODEQINGKUANGXIA,KEJIANGQIDANGZUODANXIANGLIUTIBINGYONGYIBANDELIULIANGJIJINXINGCELIANG。 

② 蒸汽严重带水,将使涡街流量计出现“漏脉冲”现象,更严重时,涡街流量计会完全没有脉冲输出。
    ③ 对于蒸汽严重带水影响涡街流量计正常测量的情况,常用的处理方法是在涡街流量计上游的适当位置充分疏水。
合理布置疏水器,使湿蒸汽的干度尽量提高,能保证涡街流量计正常测量。



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关键词:蒸汽流量表选型,涡街蒸汽流量表,蒸汽管道流量表

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