密相(xiang)氣力輸(shu)送(song)系列(lie)

氣力輸送原理

氣力(li)(li)輸(shu)(shu)(shu)(shu)送(song)(song)(song)系(xi)統(tong)可分(fen)(fen)(fen)類為(wei)(wei)(wei)不同的(de)(de)(de)(de)流(liu)(liu)(liu)動(dong)型式(shi)，其中兩種主要(yao)型式(shi)是(shi)(shi)：(a) 稀相(xiang)(xiang)輸(shu)(shu)(shu)(shu)送(song)(song)(song)和（b）密(mi)相(xiang)(xiang)輸(shu)(shu)(shu)(shu)送(song)(song)(song)每種流(liu)(liu)(liu)動(dong)型式(shi)可按物料(liao)(liao)與(yu)空氣的(de)(de)(de)(de)流(liu)(liu)(liu)量比率(lv)大(da)小分(fen)(fen)(fen)類，其比率(lv)也被(bei)稱(cheng)為(wei)(wei)(wei)“固氣比”： μ=ms/mf (1)許(xu)多稀相(xiang)(xiang)的(de)(de)(de)(de)運(yun)行(xing)范圍為(wei)(wei)(wei)0＜μ＜15，而(er)(er)密(mi)相(xiang)(xiang)通(tong)(tong)常是(shi)(shi)μ＞15。圖1所示的(de)(de)(de)(de)是(shi)(shi)典型輸(shu)(shu)(shu)(shu)送(song)(song)(song)狀(zhuang)態圖。稀相(xiang)(xiang)輸(shu)(shu)(shu)(shu)送(song)(song)(song)可以(yi)被(bei)認為(wei)(wei)(wei)是(shi)(shi)一(yi)種完(wan)(wan)全的(de)(de)(de)(de)懸(xuan)浮(fu)流(liu)(liu)(liu)，而(er)(er)密(mi)相(xiang)(xiang)輸(shu)(shu)(shu)(shu)送(song)(song)(song)通(tong)(tong)常被(bei)認為(wei)(wei)(wei)是(shi)(shi)非懸(xuan)浮(fu)流(liu)(liu)(liu)。然而(er)(er)，如圖1所示，許(xu)多不同種類的(de)(de)(de)(de)密(mi)相(xiang)(xiang)（非懸(xuan)浮(fu)流(liu)(liu)(liu)）依靠散料(liao)(liao)的(de)(de)(de)(de)料(liao)(liao)性和流(liu)(liu)(liu)動(dong)性存(cun)在(zai)。密(mi)相(xiang)(xiang)輸(shu)(shu)(shu)(shu)送(song)(song)(song)同樣也能被(bei)定義為(wei)(wei)(wei)輸(shu)(shu)(shu)(shu)送(song)(song)(song)物料(liao)(liao)完(wan)(wan)全填(tian)滿管(guan)道(dao)(dao)截(jie)面的(de)(de)(de)(de)一(yi)種輸(shu)(shu)(shu)(shu)送(song)(song)(song)方式(shi)。稀相(xiang)(xiang)輸(shu)(shu)(shu)(shu)送(song)(song)(song)通(tong)(tong)常需要(yao)使用(yong)(yong)(yong)大(da)量的(de)(de)(de)(de)高速氣體。氣流(liu)(liu)(liu)依靠升力(li)(li)和推動(dong)力(li)(li)以(yi)離散粒子的(de)(de)(de)(de)形式(shi)攜帶著物料(liao)(liao)。參考圖1中所述的(de)(de)(de)(de)“懸(xuan)浮(fu)流(liu)(liu)(liu)”，稀相(xiang)(xiang)系(xi)統(tong)通(tong)(tong)常是(shi)(shi)最為(wei)(wei)(wei)被(bei)廣泛應用(yong)(yong)(yong)的(de)(de)(de)(de)氣力(li)(li)輸(shu)(shu)(shu)(shu)送(song)(song)(song)系(xi)統(tong)。由(you)于稀相(xiang)(xiang)系(xi)統(tong)設計的(de)(de)(de)(de)相(xiang)(xiang)對簡(jian)單性，它們(men)同時也被(bei)頻繁的(de)(de)(de)(de)應用(yong)(yong)(yong)在(zai)工(gong)業領域(yu)。輸(shu)(shu)(shu)(shu)送(song)(song)(song)氣體的(de)(de)(de)(de)速度(du)減少到比保持粒子懸(xuan)浮(fu)狀(zhuang)態的(de)(de)(de)(de)臨(lin)界(jie)值更小時，導致物料(liao)(liao)在(zai)輸(shu)(shu)(shu)(shu)送(song)(song)(song)管(guan)道(dao)(dao)的(de)(de)(de)(de)橫截(jie)面形成不均勻的(de)(de)(de)(de)分(fen)(fen)(fen)布。臨(lin)界(jie)氣體速度(du)被(bei)稱(cheng)為(wei)(wei)(wei)是(shi)(shi)水平輸(shu)(shu)(shu)(shu)送(song)(song)(song)的(de)(de)(de)(de)跳躍速度(du)，垂直輸(shu)(shu)(shu)(shu)送(song)(song)(song)時堵塞。當(dang)水平管(guan)道(dao)(dao)中的(de)(de)(de)(de)物料(liao)(liao)表面氣體速度(du)低(di)(di)于突變速度(du)時，輸(shu)(shu)(shu)(shu)送(song)(song)(song)將會以(yi)低(di)(di)流(liu)(liu)(liu)量通(tong)(tong)過管(guan)道(dao)(dao)橫截(jie)面的(de)(de)(de)(de)上部(bu)(bu)，在(zai)管(guan)道(dao)(dao)的(de)(de)(de)(de)剩余部(bu)(bu)分(fen)(fen)(fen)以(yi)高濃度(du)低(di)(di)速度(du)的(de)(de)(de)(de)形式(shi)填(tian)充。有時沿管(guan)道(dao)(dao)的(de)(de)(de)(de)橫截(jie)面會被(bei)填(tian)滿，而(er)(er)有時只是(shi)(shi)部(bu)(bu)分(fen)(fen)(fen)被(bei)填(tian)滿.

實際應(ying)用(yong)中, 按照氣力驅動形式(shi)可以分為負壓和正壓氣力輸(shu)(shu)(shu)(shu)(shu)送(song)(song), 在(zai)這兩(liang)種輸(shu)(shu)(shu)(shu)(shu)送(song)(song)系統中, 根據流動狀(zhuang)態圖再區分分為稀相(xiang), 密相(xiang)和流化(hua)態輸(shu)(shu)(shu)(shu)(shu)送(song)(song)系統. 除此之外(wai),根據喂料不同分為連續(xu)和批次(ci)輸(shu)(shu)(shu)(shu)(shu)送(song)(song). 在(zai)高壓密相(xiang)輸(shu)(shu)(shu)(shu)(shu)送(song)(song)技術中常(chang)采用(yong)批次(ci)的壓力罐(guan)進行高壓輸(shu)(shu)(shu)(shu)(shu)送(song)(song), 同時(shi), 可以組合兩(liang)個壓力罐(guan)設(she)計達到(dao)連續(xu)的輸(shu)(shu)(shu)(shu)(shu)送(song)(song).

密相氣(qi)力輸送特點:

● 用氣量小(xiao), 節能

● 無殘(can)留輸送(song)

● 不堵塞, 運行可靠

● 維護費用(yong)低

● 適合于各類粉(fen)粒物(wu)料

● 壓(ya)力至0. 6m p a可調

● 適合于柔性(xing)化自動生產中(zhong)的物料高效輸送