密相(xiang)氣力輸送系列

氣力(li)輸送原(yuan)理

氣(qi)(qi)(qi)力輸(shu)(shu)(shu)(shu)(shu)送(song)(song)系(xi)統(tong)可(ke)分(fen)(fen)(fen)類(lei)為不(bu)同的(de)(de)(de)(de)流(liu)(liu)動型(xing)(xing)(xing)式，其(qi)中兩種主要型(xing)(xing)(xing)式是(shi)(shi)(shi)：(a) 稀相(xiang)(xiang)(xiang)輸(shu)(shu)(shu)(shu)(shu)送(song)(song)和（b）密相(xiang)(xiang)(xiang)輸(shu)(shu)(shu)(shu)(shu)送(song)(song)每(mei)種流(liu)(liu)動型(xing)(xing)(xing)式可(ke)按(an)物料(liao)(liao)與空氣(qi)(qi)(qi)的(de)(de)(de)(de)流(liu)(liu)量比(bi)(bi)率(lv)大小(xiao)分(fen)(fen)(fen)類(lei)，其(qi)比(bi)(bi)率(lv)也被(bei)(bei)稱為“固氣(qi)(qi)(qi)比(bi)(bi)”： μ=ms/mf (1)許多稀相(xiang)(xiang)(xiang)的(de)(de)(de)(de)運行范圍為0＜μ＜15，而(er)密相(xiang)(xiang)(xiang)通(tong)(tong)(tong)常(chang)是(shi)(shi)(shi)μ＞15。圖(tu)1所(suo)示(shi)的(de)(de)(de)(de)是(shi)(shi)(shi)典型(xing)(xing)(xing)輸(shu)(shu)(shu)(shu)(shu)送(song)(song)狀(zhuang)態圖(tu)。稀相(xiang)(xiang)(xiang)輸(shu)(shu)(shu)(shu)(shu)送(song)(song)可(ke)以被(bei)(bei)認為是(shi)(shi)(shi)一種完全的(de)(de)(de)(de)懸浮(fu)流(liu)(liu)，而(er)密相(xiang)(xiang)(xiang)輸(shu)(shu)(shu)(shu)(shu)送(song)(song)通(tong)(tong)(tong)常(chang)被(bei)(bei)認為是(shi)(shi)(shi)非懸浮(fu)流(liu)(liu)。然而(er)，如圖(tu)1所(suo)示(shi)，許多不(bu)同種類(lei)的(de)(de)(de)(de)密相(xiang)(xiang)(xiang)（非懸浮(fu)流(liu)(liu)）依靠散料(liao)(liao)的(de)(de)(de)(de)料(liao)(liao)性和流(liu)(liu)動性存在。密相(xiang)(xiang)(xiang)輸(shu)(shu)(shu)(shu)(shu)送(song)(song)同樣(yang)也能被(bei)(bei)定義為輸(shu)(shu)(shu)(shu)(shu)送(song)(song)物料(liao)(liao)完全填(tian)滿(man)管道(dao)截(jie)面的(de)(de)(de)(de)一種輸(shu)(shu)(shu)(shu)(shu)送(song)(song)方(fang)式。稀相(xiang)(xiang)(xiang)輸(shu)(shu)(shu)(shu)(shu)送(song)(song)通(tong)(tong)(tong)常(chang)需(xu)要使用大量的(de)(de)(de)(de)高(gao)速(su)(su)氣(qi)(qi)(qi)體(ti)。氣(qi)(qi)(qi)流(liu)(liu)依靠升力和推動力以離(li)散粒(li)子的(de)(de)(de)(de)形式攜(xie)帶著物料(liao)(liao)。參考圖(tu)1中所(suo)述的(de)(de)(de)(de)“懸浮(fu)流(liu)(liu)”，稀相(xiang)(xiang)(xiang)系(xi)統(tong)通(tong)(tong)(tong)常(chang)是(shi)(shi)(shi)最(zui)為被(bei)(bei)廣(guang)泛應(ying)用的(de)(de)(de)(de)氣(qi)(qi)(qi)力輸(shu)(shu)(shu)(shu)(shu)送(song)(song)系(xi)統(tong)。由于(yu)稀相(xiang)(xiang)(xiang)系(xi)統(tong)設(she)計的(de)(de)(de)(de)相(xiang)(xiang)(xiang)對(dui)簡(jian)單性，它們(men)同時(shi)(shi)也被(bei)(bei)頻繁的(de)(de)(de)(de)應(ying)用在工(gong)業領域。輸(shu)(shu)(shu)(shu)(shu)送(song)(song)氣(qi)(qi)(qi)體(ti)的(de)(de)(de)(de)速(su)(su)度(du)(du)減少(shao)到(dao)比(bi)(bi)保持(chi)粒(li)子懸浮(fu)狀(zhuang)態的(de)(de)(de)(de)臨(lin)界值更(geng)小(xiao)時(shi)(shi)，導致物料(liao)(liao)在輸(shu)(shu)(shu)(shu)(shu)送(song)(song)管道(dao)的(de)(de)(de)(de)橫(heng)截(jie)面形成不(bu)均(jun)勻(yun)的(de)(de)(de)(de)分(fen)(fen)(fen)布。臨(lin)界氣(qi)(qi)(qi)體(ti)速(su)(su)度(du)(du)被(bei)(bei)稱為是(shi)(shi)(shi)水平輸(shu)(shu)(shu)(shu)(shu)送(song)(song)的(de)(de)(de)(de)跳躍速(su)(su)度(du)(du)，垂直輸(shu)(shu)(shu)(shu)(shu)送(song)(song)時(shi)(shi)堵塞。當水平管道(dao)中的(de)(de)(de)(de)物料(liao)(liao)表(biao)面氣(qi)(qi)(qi)體(ti)速(su)(su)度(du)(du)低(di)于(yu)突變(bian)速(su)(su)度(du)(du)時(shi)(shi)，輸(shu)(shu)(shu)(shu)(shu)送(song)(song)將(jiang)會以低(di)流(liu)(liu)量通(tong)(tong)(tong)過管道(dao)橫(heng)截(jie)面的(de)(de)(de)(de)上部，在管道(dao)的(de)(de)(de)(de)剩余(yu)部分(fen)(fen)(fen)以高(gao)濃(nong)度(du)(du)低(di)速(su)(su)度(du)(du)的(de)(de)(de)(de)形式填(tian)充。有時(shi)(shi)沿管道(dao)的(de)(de)(de)(de)橫(heng)截(jie)面會被(bei)(bei)填(tian)滿(man)，而(er)有時(shi)(shi)只是(shi)(shi)(shi)部分(fen)(fen)(fen)被(bei)(bei)填(tian)滿(man).

實際應用中, 按(an)照氣力驅動形式可以分(fen)為(wei)負壓和正(zheng)壓氣力輸送(song), 在這兩種輸送(song)系統(tong)中, 根據流動狀(zhuang)態(tai)圖再區分(fen)分(fen)為(wei)稀相, 密相和流化態(tai)輸送(song)系統(tong). 除此之外,根據喂料不同(tong)分(fen)為(wei)連續和批次輸送(song). 在高壓密相輸送(song)技(ji)術中常(chang)采用批次的(de)壓力罐進行高壓輸送(song), 同(tong)時, 可以組合兩個壓力罐設(she)計(ji)達(da)到連續的(de)輸送(song).

密相氣力輸送特點(dian):

● 用氣量(liang)小(xiao), 節能

● 無殘留輸送

● 不堵塞, 運行(xing)可靠

● 維護費用低

● 適合于各類粉粒物料

● 壓力至0. 6m p a可(ke)調(diao)

● 適合(he)于柔(rou)性(xing)化自(zi)動生產中的物料高(gao)效輸送