靜電粉塵檢測儀的工作原理
更新時間：2017-04-28 13:58:33
粉(fen)塵濃度檢測(ce)(ce)儀采用*可靠的靜(jing)電(dian)測(ce)(ce)量技術。當管道內(nei)含(han)有粉(fen)塵粒子的氣流(liu)經過一個固(gu)定(ding)的傳感器(qi)(qi)時，粉(fen)塵粒子在運動中所產生的微弱電(dian)流(liu)被傳感器(qi)(qi)采集并傳送(song)至變送(song)器(qi)(qi)。經變送(song)器(qi)(qi)過濾、放(fang)大，并處理成為一個與粉(fen)塵含(han)量成線性關系的標(biao)準輸出值。
除(chu)塵(chen)(chen)(chen)布(bu)袋檢(jian)漏(lou)儀采(cai)用交流(liu)(liu)(liu)靜(jing)(jing)(jing)電(dian)(dian)(dian)(dian)感(gan)應(ying)(ying)(ying)原理，當(dang)含有(you)粉塵(chen)(chen)(chen)顆粒(li)(li)的(de)氣(qi)(qi)固(gu)兩相流(liu)(liu)(liu)體(ti)在經過(guo)管(guan)道和除(chu)塵(chen)(chen)(chen)器的(de)輸送過(guo)程(cheng)安裝中(zhong),由(you)于粉塵(chen)(chen)(chen)顆粒(li)(li)與(yu)(yu)粉塵(chen)(chen)(chen)顆粒(li)(li)、粉塵(chen)(chen)(chen)顆粒(li)(li)與(yu)(yu)管(guan)道內壁、粉塵(chen)(chen)(chen)顆粒(li)(li)與(yu)(yu)過(guo)濾濾芯(xin)及(ji)粉塵(chen)(chen)(chen)顆粒(li)(li)與(yu)(yu)煙道氣(qi)(qi)體(ti)的(de)碰撞和摩擦,將使粉塵(chen)(chen)(chen)顆粒(li)(li)帶有(you)靜(jing)(jing)(jing)電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)荷(he)(he).其靜(jing)(jing)(jing)電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)荷(he)(he)量(liang)(liang)(liang)(liang)與(yu)(yu)管(guan)道內的(de)氣(qi)(qi)固(gu)兩相流(liu)(liu)(liu)體(ti)中(zhong)粉塵(chen)(chen)(chen)含量(liang)(liang)(liang)(liang)有(you)直接關(guan)系,電(dian)(dian)(dian)(dian)荷(he)(he)量(liang)(liang)(liang)(liang)的(de)算術平均(jun)值及(ji)擾動量(liang)(liang)(liang)(liang)的(de)均(jun)方根值都反應(ying)(ying)(ying)出管(guan)道內粉塵(chen)(chen)(chen)含量(liang)(liang)(liang)(liang).這種電(dian)(dian)(dian)(dian)荷(he)(he)轉換(huan)被稱為靜(jing)(jing)(jing)電(dian)(dian)(dian)(dian)摩擦效(xiao)應(ying)(ying)(ying)，或者稱為靜(jing)(jing)(jing)電(dian)(dian)(dian)(dian)感(gan)應(ying)(ying)(ying)。除(chu)塵(chen)(chen)(chen)布(bu)袋檢(jian)漏(lou)儀采(cai)用交流(liu)(liu)(liu)靜(jing)(jing)(jing)電(dian)(dian)(dian)(dian)感(gan)應(ying)(ying)(ying)原理，測量(liang)(liang)(liang)(liang)靜(jing)(jing)(jing)電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)荷(he)(he)的(de)變(bian)化，來判斷(duan)布(bu)袋除(chu)塵(chen)(chen)(chen)系統的(de)運行是否正(zheng)常(chang)。當(dang)布(bu)袋破裂時，管(guan)道中(zhong)氣(qi)(qi)固(gu)兩相流(liu)(liu)(liu)粉塵(chen)(chen)(chen)含量(liang)(liang)(liang)(liang)增加，同時靜(jing)(jing)(jing)電(dian)(dian)(dian)(dian)場強度(du)增大(da)。
