密相氣力(li)輸送系列

氣力輸送原(yuan)理

氣(qi)(qi)(qi)力輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)系統可分(fen)(fen)類(lei)為(wei)不(bu)同(tong)的(de)(de)(de)(de)流(liu)(liu)動(dong)型(xing)式(shi)，其(qi)中兩(liang)種(zhong)(zhong)(zhong)主要型(xing)式(shi)是(shi)：(a) 稀(xi)相(xiang)(xiang)(xiang)輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)和(he)（b）密相(xiang)(xiang)(xiang)輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)每種(zhong)(zhong)(zhong)流(liu)(liu)動(dong)型(xing)式(shi)可按物料與(yu)空氣(qi)(qi)(qi)的(de)(de)(de)(de)流(liu)(liu)量比(bi)率大小分(fen)(fen)類(lei)，其(qi)比(bi)率也(ye)被(bei)(bei)稱(cheng)為(wei)“固氣(qi)(qi)(qi)比(bi)”： μ=ms/mf (1)許(xu)多(duo)(duo)稀(xi)相(xiang)(xiang)(xiang)的(de)(de)(de)(de)運行(xing)范(fan)圍為(wei)0＜μ＜15，而(er)密相(xiang)(xiang)(xiang)通(tong)常是(shi)μ＞15。圖(tu)1所示(shi)的(de)(de)(de)(de)是(shi)典型(xing)輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)狀態圖(tu)。稀(xi)相(xiang)(xiang)(xiang)輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)可以被(bei)(bei)認(ren)為(wei)是(shi)一種(zhong)(zhong)(zhong)完全的(de)(de)(de)(de)懸(xuan)浮流(liu)(liu)，而(er)密相(xiang)(xiang)(xiang)輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)通(tong)常被(bei)(bei)認(ren)為(wei)是(shi)非(fei)懸(xuan)浮流(liu)(liu)。然而(er)，如圖(tu)1所示(shi)，許(xu)多(duo)(duo)不(bu)同(tong)種(zhong)(zhong)(zhong)類(lei)的(de)(de)(de)(de)密相(xiang)(xiang)(xiang)（非(fei)懸(xuan)浮流(liu)(liu)）依靠散料的(de)(de)(de)(de)料性和(he)流(liu)(liu)動(dong)性存在。密相(xiang)(xiang)(xiang)輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)同(tong)樣也(ye)能被(bei)(bei)定義為(wei)輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)物料完全填(tian)滿(man)管(guan)道(dao)截(jie)面的(de)(de)(de)(de)一種(zhong)(zhong)(zhong)輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)方(fang)式(shi)。稀(xi)相(xiang)(xiang)(xiang)輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)通(tong)常需要使用(yong)大量的(de)(de)(de)(de)高速氣(qi)(qi)(qi)體(ti)。氣(qi)(qi)(qi)流(liu)(liu)依靠升力和(he)推動(dong)力以離散粒子的(de)(de)(de)(de)形式(shi)攜帶著(zhu)物料。參考圖(tu)1中所述的(de)(de)(de)(de)“懸(xuan)浮流(liu)(liu)”，稀(xi)相(xiang)(xiang)(xiang)系統通(tong)常是(shi)最(zui)為(wei)被(bei)(bei)廣(guang)泛應用(yong)的(de)(de)(de)(de)氣(qi)(qi)(qi)力輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)系統。由于稀(xi)相(xiang)(xiang)(xiang)系統設計的(de)(de)(de)(de)相(xiang)(xiang)(xiang)對簡單性，它們同(tong)時(shi)(shi)(shi)(shi)也(ye)被(bei)(bei)頻繁的(de)(de)(de)(de)應用(yong)在工業領域。輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)氣(qi)(qi)(qi)體(ti)的(de)(de)(de)(de)速度減少到(dao)比(bi)保(bao)持粒子懸(xuan)浮狀態的(de)(de)(de)(de)臨界值更(geng)小時(shi)(shi)(shi)(shi)，導致物料在輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)管(guan)道(dao)的(de)(de)(de)(de)橫(heng)截(jie)面形成不(bu)均勻的(de)(de)(de)(de)分(fen)(fen)布。臨界氣(qi)(qi)(qi)體(ti)速度被(bei)(bei)稱(cheng)為(wei)是(shi)水(shui)平輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)的(de)(de)(de)(de)跳(tiao)躍(yue)速度，垂(chui)直輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)時(shi)(shi)(shi)(shi)堵(du)塞(sai)。當水(shui)平管(guan)道(dao)中的(de)(de)(de)(de)物料表面氣(qi)(qi)(qi)體(ti)速度低(di)(di)于突變(bian)速度時(shi)(shi)(shi)(shi)，輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)將(jiang)會以低(di)(di)流(liu)(liu)量通(tong)過管(guan)道(dao)橫(heng)截(jie)面的(de)(de)(de)(de)上部，在管(guan)道(dao)的(de)(de)(de)(de)剩余部分(fen)(fen)以高濃度低(di)(di)速度的(de)(de)(de)(de)形式(shi)填(tian)充。有(you)時(shi)(shi)(shi)(shi)沿(yan)管(guan)道(dao)的(de)(de)(de)(de)橫(heng)截(jie)面會被(bei)(bei)填(tian)滿(man)，而(er)有(you)時(shi)(shi)(shi)(shi)只是(shi)部分(fen)(fen)被(bei)(bei)填(tian)滿(man).

實際應用中, 按照氣力驅動(dong)形式可(ke)以分(fen)為負壓(ya)(ya)和正壓(ya)(ya)氣力輸(shu)(shu)送(song)(song), 在這(zhe)兩(liang)種輸(shu)(shu)送(song)(song)系統中, 根據流動(dong)狀(zhuang)態(tai)圖再區分(fen)分(fen)為稀相, 密相和流化(hua)態(tai)輸(shu)(shu)送(song)(song)系統. 除(chu)此之外,根據喂料不(bu)同分(fen)為連(lian)續(xu)和批次(ci)輸(shu)(shu)送(song)(song). 在高壓(ya)(ya)密相輸(shu)(shu)送(song)(song)技術中常采用批次(ci)的壓(ya)(ya)力罐進行高壓(ya)(ya)輸(shu)(shu)送(song)(song), 同時, 可(ke)以組合兩(liang)個壓(ya)(ya)力罐設(she)計(ji)達到連(lian)續(xu)的輸(shu)(shu)送(song)(song).

密相氣力輸送特點:

● 用(yong)氣量小, 節(jie)能

● 無殘留輸送

● 不堵塞, 運行(xing)可(ke)靠

● 維護費用低

● 適合于各類(lei)粉粒物料

● 壓(ya)力(li)至0. 6m p a可調

● 適合于柔(rou)性化自動(dong)生(sheng)產中的物料高效輸送