密相氣力(li)輸送系列

氣(qi)力輸送原理

氣(qi)力輸(shu)(shu)(shu)送(song)(song)(song)系(xi)(xi)統可分(fen)類(lei)為(wei)不同(tong)的(de)(de)(de)(de)(de)流(liu)(liu)(liu)動型(xing)式，其中兩(liang)種(zhong)主(zhu)要(yao)(yao)型(xing)式是(shi)(shi)：(a) 稀(xi)相輸(shu)(shu)(shu)送(song)(song)(song)和（b）密相輸(shu)(shu)(shu)送(song)(song)(song)每種(zhong)流(liu)(liu)(liu)動型(xing)式可按(an)物(wu)料(liao)(liao)與空氣(qi)的(de)(de)(de)(de)(de)流(liu)(liu)(liu)量(liang)(liang)比(bi)率(lv)大小分(fen)類(lei)，其比(bi)率(lv)也(ye)被(bei)稱為(wei)“固氣(qi)比(bi)”： μ=ms/mf (1)許多稀(xi)相的(de)(de)(de)(de)(de)運行范圍為(wei)0＜μ＜15，而密相通(tong)常是(shi)(shi)μ＞15。圖(tu)1所(suo)(suo)示的(de)(de)(de)(de)(de)是(shi)(shi)典型(xing)輸(shu)(shu)(shu)送(song)(song)(song)狀(zhuang)態圖(tu)。稀(xi)相輸(shu)(shu)(shu)送(song)(song)(song)可以(yi)被(bei)認(ren)為(wei)是(shi)(shi)一種(zhong)完全的(de)(de)(de)(de)(de)懸浮(fu)流(liu)(liu)(liu)，而密相輸(shu)(shu)(shu)送(song)(song)(song)通(tong)常被(bei)認(ren)為(wei)是(shi)(shi)非懸浮(fu)流(liu)(liu)(liu)。然而，如(ru)圖(tu)1所(suo)(suo)示，許多不同(tong)種(zhong)類(lei)的(de)(de)(de)(de)(de)密相（非懸浮(fu)流(liu)(liu)(liu)）依靠散料(liao)(liao)的(de)(de)(de)(de)(de)料(liao)(liao)性(xing)和流(liu)(liu)(liu)動性(xing)存在。密相輸(shu)(shu)(shu)送(song)(song)(song)同(tong)樣也(ye)能被(bei)定義為(wei)輸(shu)(shu)(shu)送(song)(song)(song)物(wu)料(liao)(liao)完全填(tian)滿(man)管道截面(mian)(mian)的(de)(de)(de)(de)(de)一種(zhong)輸(shu)(shu)(shu)送(song)(song)(song)方式。稀(xi)相輸(shu)(shu)(shu)送(song)(song)(song)通(tong)常需要(yao)(yao)使(shi)用(yong)大量(liang)(liang)的(de)(de)(de)(de)(de)高速(su)氣(qi)體(ti)(ti)。氣(qi)流(liu)(liu)(liu)依靠升力和推(tui)動力以(yi)離散粒子(zi)的(de)(de)(de)(de)(de)形式攜帶(dai)著物(wu)料(liao)(liao)。參考(kao)圖(tu)1中所(suo)(suo)述的(de)(de)(de)(de)(de)“懸浮(fu)流(liu)(liu)(liu)”，稀(xi)相系(xi)(xi)統通(tong)常是(shi)(shi)最為(wei)被(bei)廣泛應用(yong)的(de)(de)(de)(de)(de)氣(qi)力輸(shu)(shu)(shu)送(song)(song)(song)系(xi)(xi)統。由于稀(xi)相系(xi)(xi)統設計的(de)(de)(de)(de)(de)相對簡單性(xing)，它們同(tong)時也(ye)被(bei)頻繁的(de)(de)(de)(de)(de)應用(yong)在工(gong)業(ye)領域。輸(shu)(shu)(shu)送(song)(song)(song)氣(qi)體(ti)(ti)的(de)(de)(de)(de)(de)速(su)度(du)減少(shao)到比(bi)保持粒子(zi)懸浮(fu)狀(zhuang)態的(de)(de)(de)(de)(de)臨(lin)界值(zhi)更小時，導致物(wu)料(liao)(liao)在輸(shu)(shu)(shu)送(song)(song)(song)管道的(de)(de)(de)(de)(de)橫(heng)截面(mian)(mian)形成不均勻的(de)(de)(de)(de)(de)分(fen)布。臨(lin)界氣(qi)體(ti)(ti)速(su)度(du)被(bei)稱為(wei)是(shi)(shi)水(shui)平(ping)輸(shu)(shu)(shu)送(song)(song)(song)的(de)(de)(de)(de)(de)跳(tiao)躍速(su)度(du)，垂直(zhi)輸(shu)(shu)(shu)送(song)(song)(song)時堵塞(sai)。當水(shui)平(ping)管道中的(de)(de)(de)(de)(de)物(wu)料(liao)(liao)表面(mian)(mian)氣(qi)體(ti)(ti)速(su)度(du)低于突變(bian)速(su)度(du)時，輸(shu)(shu)(shu)送(song)(song)(song)將會以(yi)低流(liu)(liu)(liu)量(liang)(liang)通(tong)過管道橫(heng)截面(mian)(mian)的(de)(de)(de)(de)(de)上部(bu)，在管道的(de)(de)(de)(de)(de)剩余部(bu)分(fen)以(yi)高濃度(du)低速(su)度(du)的(de)(de)(de)(de)(de)形式填(tian)充。有時沿管道的(de)(de)(de)(de)(de)橫(heng)截面(mian)(mian)會被(bei)填(tian)滿(man)，而有時只是(shi)(shi)部(bu)分(fen)被(bei)填(tian)滿(man).

實際應用(yong)中, 按照(zhao)氣力(li)(li)驅動形式(shi)可以分為(wei)負壓(ya)(ya)(ya)(ya)和(he)正(zheng)壓(ya)(ya)(ya)(ya)氣力(li)(li)輸送, 在(zai)這兩(liang)種(zhong)輸送系統(tong)中, 根據流動狀態(tai)圖再(zai)區分分為(wei)稀相(xiang), 密相(xiang)和(he)流化態(tai)輸送系統(tong). 除此(ci)之外,根據喂料不同分為(wei)連續(xu)和(he)批次(ci)輸送. 在(zai)高壓(ya)(ya)(ya)(ya)密相(xiang)輸送技(ji)術中常采用(yong)批次(ci)的(de)壓(ya)(ya)(ya)(ya)力(li)(li)罐進行(xing)高壓(ya)(ya)(ya)(ya)輸送, 同時, 可以組合兩(liang)個壓(ya)(ya)(ya)(ya)力(li)(li)罐設計達到連續(xu)的(de)輸送.

密相氣力輸送(song)特點:

● 用氣量(liang)小, 節能

● 無(wu)殘留輸送

● 不堵塞, 運行可(ke)靠

● 維護費用(yong)低

● 適合(he)于各類粉粒物料(liao)

● 壓力(li)至(zhi)0. 6m p a可調

● 適合于柔性化自(zi)動(dong)生產中的物料高效輸送