密(mi)相氣力(li)輸送系列(lie)

氣力輸送(song)原理

氣力(li)輸(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)系(xi)(xi)(xi)統(tong)(tong)可分類為(wei)(wei)不(bu)同(tong)的(de)(de)(de)(de)(de)(de)流(liu)(liu)動型式(shi)(shi)，其(qi)(qi)中兩種(zhong)主要型式(shi)(shi)是(shi)(shi)：(a) 稀(xi)(xi)相(xiang)(xiang)(xiang)(xiang)輸(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)和（b）密(mi)相(xiang)(xiang)(xiang)(xiang)輸(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)每種(zhong)流(liu)(liu)動型式(shi)(shi)可按(an)物料與(yu)空氣的(de)(de)(de)(de)(de)(de)流(liu)(liu)量(liang)(liang)比(bi)(bi)率(lv)大(da)小分類，其(qi)(qi)比(bi)(bi)率(lv)也(ye)被(bei)稱為(wei)(wei)“固(gu)氣比(bi)(bi)”： μ=ms/mf (1)許(xu)多稀(xi)(xi)相(xiang)(xiang)(xiang)(xiang)的(de)(de)(de)(de)(de)(de)運行范圍為(wei)(wei)0＜μ＜15，而(er)密(mi)相(xiang)(xiang)(xiang)(xiang)通(tong)常是(shi)(shi)μ＞15。圖(tu)1所示的(de)(de)(de)(de)(de)(de)是(shi)(shi)典型輸(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)狀態圖(tu)。稀(xi)(xi)相(xiang)(xiang)(xiang)(xiang)輸(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)可以(yi)被(bei)認(ren)為(wei)(wei)是(shi)(shi)一種(zhong)完全的(de)(de)(de)(de)(de)(de)懸浮流(liu)(liu)，而(er)密(mi)相(xiang)(xiang)(xiang)(xiang)輸(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)通(tong)常被(bei)認(ren)為(wei)(wei)是(shi)(shi)非懸浮流(liu)(liu)。然而(er)，如圖(tu)1所示，許(xu)多不(bu)同(tong)種(zhong)類的(de)(de)(de)(de)(de)(de)密(mi)相(xiang)(xiang)(xiang)(xiang)（非懸浮流(liu)(liu)）依靠散(san)(san)料的(de)(de)(de)(de)(de)(de)料性和流(liu)(liu)動性存在(zai)。密(mi)相(xiang)(xiang)(xiang)(xiang)輸(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)同(tong)樣也(ye)能被(bei)定義為(wei)(wei)輸(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)物料完全填(tian)(tian)滿(man)管(guan)(guan)(guan)道(dao)(dao)截面(mian)的(de)(de)(de)(de)(de)(de)一種(zhong)輸(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)方式(shi)(shi)。稀(xi)(xi)相(xiang)(xiang)(xiang)(xiang)輸(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)通(tong)常需要使用大(da)量(liang)(liang)的(de)(de)(de)(de)(de)(de)高速(su)(su)氣體(ti)。氣流(liu)(liu)依靠升(sheng)力(li)和推(tui)動力(li)以(yi)離散(san)(san)粒子的(de)(de)(de)(de)(de)(de)形(xing)(xing)式(shi)(shi)攜帶(dai)著物料。參考圖(tu)1中所述(shu)的(de)(de)(de)(de)(de)(de)“懸浮流(liu)(liu)”，稀(xi)(xi)相(xiang)(xiang)(xiang)(xiang)系(xi)(xi)(xi)統(tong)(tong)通(tong)常是(shi)(shi)最為(wei)(wei)被(bei)廣泛應用的(de)(de)(de)(de)(de)(de)氣力(li)輸(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)系(xi)(xi)(xi)統(tong)(tong)。由于(yu)稀(xi)(xi)相(xiang)(xiang)(xiang)(xiang)系(xi)(xi)(xi)統(tong)(tong)設計的(de)(de)(de)(de)(de)(de)相(xiang)(xiang)(xiang)(xiang)對簡單(dan)性，它(ta)們同(tong)時(shi)也(ye)被(bei)頻繁的(de)(de)(de)(de)(de)(de)應用在(zai)工業領域。輸(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)氣體(ti)的(de)(de)(de)(de)(de)(de)速(su)(su)度(du)減少到比(bi)(bi)保持(chi)粒子懸浮狀態的(de)(de)(de)(de)(de)(de)臨(lin)界值更小時(shi)，導致物料在(zai)輸(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)管(guan)(guan)(guan)道(dao)(dao)的(de)(de)(de)(de)(de)(de)橫(heng)截面(mian)形(xing)(xing)成不(bu)均勻的(de)(de)(de)(de)(de)(de)分布(bu)。臨(lin)界氣體(ti)速(su)(su)度(du)被(bei)稱為(wei)(wei)是(shi)(shi)水平輸(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)的(de)(de)(de)(de)(de)(de)跳躍速(su)(su)度(du)，垂直(zhi)輸(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)時(shi)堵塞。當水平管(guan)(guan)(guan)道(dao)(dao)中的(de)(de)(de)(de)(de)(de)物料表面(mian)氣體(ti)速(su)(su)度(du)低(di)于(yu)突變速(su)(su)度(du)時(shi)，輸(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)將會以(yi)低(di)流(liu)(liu)量(liang)(liang)通(tong)過(guo)管(guan)(guan)(guan)道(dao)(dao)橫(heng)截面(mian)的(de)(de)(de)(de)(de)(de)上部，在(zai)管(guan)(guan)(guan)道(dao)(dao)的(de)(de)(de)(de)(de)(de)剩余部分以(yi)高濃度(du)低(di)速(su)(su)度(du)的(de)(de)(de)(de)(de)(de)形(xing)(xing)式(shi)(shi)填(tian)(tian)充。有時(shi)沿管(guan)(guan)(guan)道(dao)(dao)的(de)(de)(de)(de)(de)(de)橫(heng)截面(mian)會被(bei)填(tian)(tian)滿(man)，而(er)有時(shi)只(zhi)是(shi)(shi)部分被(bei)填(tian)(tian)滿(man).

實際應用中, 按照氣力驅動形(xing)式可(ke)以(yi)分(fen)為(wei)(wei)負(fu)壓(ya)(ya)和正壓(ya)(ya)氣力輸送, 在(zai)這兩(liang)種輸送系(xi)統(tong)中, 根(gen)據流(liu)動狀態圖再區分(fen)分(fen)為(wei)(wei)稀相(xiang), 密相(xiang)和流(liu)化態輸送系(xi)統(tong). 除此之外,根(gen)據喂料不同(tong)分(fen)為(wei)(wei)連續和批次輸送. 在(zai)高壓(ya)(ya)密相(xiang)輸送技術中常采用批次的壓(ya)(ya)力罐(guan)進(jin)行(xing)高壓(ya)(ya)輸送, 同(tong)時, 可(ke)以(yi)組合(he)兩(liang)個壓(ya)(ya)力罐(guan)設計達(da)到連續的輸送.

密相氣力輸送(song)特點:

● 用(yong)氣(qi)量小, 節能

● 無殘留輸送

● 不(bu)堵塞, 運(yun)行可(ke)靠(kao)

● 維護費用低

● 適合于各類(lei)粉(fen)粒物料

● 壓力至0. 6m p a可(ke)調

● 適合(he)于柔性化自動生產中的(de)物料高效輸送