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洁净棚专题

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洁净棚工作原理

洁净棚工作原理

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洁净棚工作原理

洁净棚的工作原理

10-100 级的洁净棚:要使内部净化级别达到100级或以上就要使室内的洁净气流形成单向垂直流。就是说在洁净室内的气流在同一截面的任意一点气流的方向和速度保持 一致,这样就可以使洁净气流象活塞一样将室内的尘埃粒子以快的速度带走。要实现垂直流就要将高效过滤器布满屋顶,才能实现单向垂直流,达到洁净度100 级或以上的级别。
1K- 100K洁净棚:其气流组织方向和Class1-100洁净棚不同,内部的气流是以不均匀的速度呈不平行流动,伴有回流和涡流,它主要靠洁净的气流不断稀释内部空气,将内部的污染逐渐排出,来实现洁净效果。要实现洁净棚的等级不同,主要是依靠单位时间内所送风量的不同来实现的。
洁净棚形式:可分为全封闭式、半封闭式。
全封闭式-多应用于高要求场合或科研单位。

洁净棚气流工作原理

气流→空气净化系统净化处理→风机加压送风→风机过滤单元→洁净棚→带走尘土(细菌)。重复以上进程,即可到达净化目的。
洁净棚的气流以一个方向流动(或是垂直的或是水平的),并以一般是0.3米/秒至0.5米/秒(60英尺/分钟至100英尺/分钟)的均速流过整个空间。气流由洁净棚吊顶的风机过滤单元(带高效过滤器)向棚内送风。气流有如一个空气活塞,向下流经棚内,带走污染物,然后从地面排出。
洁净棚优点:
构造简单、系统建造成本低,扩充比较容易,在某些特殊用途场所,可并用超净工作台,提高洁净棚的洁净等级。
洁净棚控制微粒污染的主要途径:
1.控制污染源,减少污染发生量;
2.迅速有效地排除室内已经发生的污染;
3.有效地阻止室外的污染侵入。(或有效地防止室内污染逸至室外)
流体力学的概念:
1.稳定流与不稳定流;(按照运动要素流速、加速度等有无时间因素)
2.渐变流(流线之间基本是等距的,流线接近直线)与突变流;(按照流线形状)
渐变流中包含有均匀流(渐变流的极限情况)与非均匀流;
财神彩票注册3.层流与紊流(按照有无质点交换)。

一、非单向流洁净棚原理

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洁净棚原理

 

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财神彩票注册(2)LIUXIANXINGSANLIUQIDINGSONGCIZHONGQILIUZUZHIFANGSHISHIYONGYU4MIYISHANGDEGAODACHANGFANG。

(3)GAOXIAOGUOLVQIFENGKOUDINGSONGGAOXIAOGUOLVQIBUZHIZAISONGFENGKOU,YIBANDAIKUOSANBAN,KEHUODE1000JIDAO100000JIJIEJINGDU,SHIYIZHONGCHANGYONGDEQILIUZUZHIXINGSHI。

(4)CESONGYIBANCAIYONGCESONG,TONGCEXIACEHUI。CIZHONGXINGSHISHIYONGYUCENGGAOJIAODIDECHANGFANG,DUOYONGYUJIUCHANGFANGGAIZAO。CESONGSHINEIWOLIUDUO,JIEJINGDUZHINENGDADAO10000JI,DANGONGCHENGZAOJIADI。

FEIDANXIANGLIUJIEJINGPENGDEZUOYONGYUANLISHI:DANGYIGUGANJINGQILIUCONGSONGFENGKOUSONGRUSHINEISHI,XUNSUXIANGSIZHOUKUOSAN、HUNHE。TONGSHIBACHABUDUOTONGYANGSHULIANGDEQILIUCONGHUIFENGKOUPAIZOU,ZHEIGUGANJINGQILIUXISHIZHESHINEIWURANDEKONGQI,BAYUANLAIHANCHENNONGDUHENGAODESHINEIKONGQICHONGDANLE,YIZHIDADAOPINGHENG。SUOYIQILIUKUOSANDEYUEKUAI,YUEJUNYUN,NEIMEXISHIDEXIAOGUODANGRANYUEHAO。

财神彩票注册FEIDANXIANGLIUJIEJINGPENGDEYUANLIJIUSHIXISHIZUOYONG。

GENJUFEIDANXIANGLIUJIEJINGPENGDEGONGZUOYUANLI,TAKEYIDADAODEJIEJINGDUYIBANWEI1000~10000(6-7)JI,RUGUOSHEJIHELI,BUFENQINGKUANGXIAKEDA100(5)JI。SHINEIHUANQICISHUYUEDA,YIBANLAISHUO,SUODEJIEJINGDUYEYUEGAO。

 

二、层流洁净棚

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1、垂直单向流洁净棚

(1)DINGPENGMANBUGAOXIAOGUOLVQISONGFENG,QUANDIBANGEZHAHUIFENG

ZHEISHIDIANXINGDECHUIZHIDANXIANGLIUJIEJINGPENG,JIANTU。

净化工作棚原理

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(2)CEBUGAOXIAOGUOLVQIDINGPENGZUNICENGSONGFENG,QUANDIBANGEZHAHUIFENG

(3)DINGPENGHECEMIANSHUANGBUGAOXIAOGUOLVQISONGFENG,QUANDIBANGEZHAHUIFENG

(4)QUANDINGPENGSONGFENG,LIANGCEXIAHUIFENG


2、水平单向流洁净棚

(1)SONGFENGQIANGMANBUGAOXIAOGUOLVQISHUIPINGSONGFENG,QUANQIANGMIANHUIFENG

(2)“SUIDAO”SHIDANXIANGLIUSONGFENG

 

JIBENYUANLI

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3、ZHUYAOTEDIAN

(1)QUANSHIDUANMIANSHANGDELIUSUBIJIAOJUNYUN。

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(3)ZHISHAOZAIGONGZUOQUNEIMEIYOUWOLIU。

 

4、DANXIANGLIUJIEJINGPENGDESANXIANGTEXINGZHIBIAO

(LIUXIANPINGXINGDU、FEIDANXIANGLIUDU、XIAXIANFENGSU)

1、LIUXIANPINGXINGDU

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3、XIAXIANFENGSU

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  4)QUANSHIBEIWURAN:

(2)KONGZHIDUOFANGWEIWURAN

  DUIYURENTI,FENGSUDA0.22m/sSHI,ZAIJURENTI0.3mCHU,WURANNONGDUYIJIANGDIDAO5(100)JIYIXIA。

(3)KONGZHITONGXIANGWURAN

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(4)KONGZHINIXIANGWURAN

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(5)MANZUHESHIDEZIJINGSHIJIAN

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(6)ZONGHEFENXI

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净化工作棚原理

  YIYAOGONGYEJIEJINGCHANGFANGQILIUZUZHIYUSONGFENG

   《JIEJINGCHANGFANGSHEJIGUIFAN》GUIDING:

  1-4JIYINGCHUIZHIDANXIANGLIU

财神彩票注册  5JIYINGCHUIZHIDANXIANGLIUHUOSHUIPINGDANXIANGLIU

财神彩票注册  6-9JIYIFEIDANXIANGLIU

 

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