密相氣力(li)輸送系列

氣力輸送原理

氣(qi)力輸(shu)(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)系(xi)(xi)統(tong)可(ke)分類為(wei)(wei)不(bu)同的(de)(de)(de)(de)(de)流(liu)(liu)動型式(shi)(shi)(shi)，其(qi)中兩種主要型式(shi)(shi)(shi)是(shi)：(a) 稀(xi)相(xiang)(xiang)(xiang)輸(shu)(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)和(he)（b）密(mi)相(xiang)(xiang)(xiang)輸(shu)(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)每種流(liu)(liu)動型式(shi)(shi)(shi)可(ke)按物(wu)(wu)料與空氣(qi)的(de)(de)(de)(de)(de)流(liu)(liu)量(liang)比(bi)率大小(xiao)分類，其(qi)比(bi)率也被(bei)(bei)(bei)稱(cheng)為(wei)(wei)“固氣(qi)比(bi)”： μ=ms/mf (1)許多稀(xi)相(xiang)(xiang)(xiang)的(de)(de)(de)(de)(de)運行范圍為(wei)(wei)0＜μ＜15，而(er)密(mi)相(xiang)(xiang)(xiang)通常(chang)(chang)是(shi)μ＞15。圖1所示的(de)(de)(de)(de)(de)是(shi)典型輸(shu)(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)狀態圖。稀(xi)相(xiang)(xiang)(xiang)輸(shu)(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)可(ke)以(yi)(yi)被(bei)(bei)(bei)認為(wei)(wei)是(shi)一種完全的(de)(de)(de)(de)(de)懸(xuan)(xuan)浮(fu)(fu)流(liu)(liu)，而(er)密(mi)相(xiang)(xiang)(xiang)輸(shu)(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)通常(chang)(chang)被(bei)(bei)(bei)認為(wei)(wei)是(shi)非(fei)懸(xuan)(xuan)浮(fu)(fu)流(liu)(liu)。然而(er)，如圖1所示，許多不(bu)同種類的(de)(de)(de)(de)(de)密(mi)相(xiang)(xiang)(xiang)（非(fei)懸(xuan)(xuan)浮(fu)(fu)流(liu)(liu)）依(yi)(yi)靠散料的(de)(de)(de)(de)(de)料性和(he)流(liu)(liu)動性存在。密(mi)相(xiang)(xiang)(xiang)輸(shu)(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)同樣也能被(bei)(bei)(bei)定義為(wei)(wei)輸(shu)(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)物(wu)(wu)料完全填(tian)滿(man)管(guan)道截面的(de)(de)(de)(de)(de)一種輸(shu)(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)方式(shi)(shi)(shi)。稀(xi)相(xiang)(xiang)(xiang)輸(shu)(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)通常(chang)(chang)需要使用(yong)(yong)大量(liang)的(de)(de)(de)(de)(de)高速(su)(su)(su)氣(qi)體(ti)(ti)。氣(qi)流(liu)(liu)依(yi)(yi)靠升力和(he)推動力以(yi)(yi)離散粒(li)子的(de)(de)(de)(de)(de)形式(shi)(shi)(shi)攜帶著物(wu)(wu)料。參考圖1中所述的(de)(de)(de)(de)(de)“懸(xuan)(xuan)浮(fu)(fu)流(liu)(liu)”，稀(xi)相(xiang)(xiang)(xiang)系(xi)(xi)統(tong)通常(chang)(chang)是(shi)最為(wei)(wei)被(bei)(bei)(bei)廣泛應用(yong)(yong)的(de)(de)(de)(de)(de)氣(qi)力輸(shu)(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)系(xi)(xi)統(tong)。由于稀(xi)相(xiang)(xiang)(xiang)系(xi)(xi)統(tong)設計的(de)(de)(de)(de)(de)相(xiang)(xiang)(xiang)對簡(jian)單性，它們同時也被(bei)(bei)(bei)頻(pin)繁(fan)的(de)(de)(de)(de)(de)應用(yong)(yong)在工業領域。輸(shu)(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)氣(qi)體(ti)(ti)的(de)(de)(de)(de)(de)速(su)(su)(su)度(du)減少到比(bi)保(bao)持粒(li)子懸(xuan)(xuan)浮(fu)(fu)狀態的(de)(de)(de)(de)(de)臨(lin)界值更小(xiao)時，導致物(wu)(wu)料在輸(shu)(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)管(guan)道的(de)(de)(de)(de)(de)橫(heng)截面形成不(bu)均勻的(de)(de)(de)(de)(de)分布。臨(lin)界氣(qi)體(ti)(ti)速(su)(su)(su)度(du)被(bei)(bei)(bei)稱(cheng)為(wei)(wei)是(shi)水平輸(shu)(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)的(de)(de)(de)(de)(de)跳躍速(su)(su)(su)度(du)，垂直(zhi)輸(shu)(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)時堵塞。當水平管(guan)道中的(de)(de)(de)(de)(de)物(wu)(wu)料表面氣(qi)體(ti)(ti)速(su)(su)(su)度(du)低(di)(di)于突變速(su)(su)(su)度(du)時，輸(shu)(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)將會(hui)以(yi)(yi)低(di)(di)流(liu)(liu)量(liang)通過管(guan)道橫(heng)截面的(de)(de)(de)(de)(de)上部，在管(guan)道的(de)(de)(de)(de)(de)剩余(yu)部分以(yi)(yi)高濃(nong)度(du)低(di)(di)速(su)(su)(su)度(du)的(de)(de)(de)(de)(de)形式(shi)(shi)(shi)填(tian)充。有(you)時沿管(guan)道的(de)(de)(de)(de)(de)橫(heng)截面會(hui)被(bei)(bei)(bei)填(tian)滿(man)，而(er)有(you)時只是(shi)部分被(bei)(bei)(bei)填(tian)滿(man).

實際應用中, 按照(zhao)氣力驅動(dong)形式可以分(fen)(fen)(fen)為負壓(ya)和(he)(he)正(zheng)壓(ya)氣力輸(shu)(shu)(shu)(shu)送(song)(song), 在(zai)這兩(liang)種輸(shu)(shu)(shu)(shu)送(song)(song)系統中, 根據流動(dong)狀(zhuang)態(tai)圖再區(qu)分(fen)(fen)(fen)分(fen)(fen)(fen)為稀相, 密相和(he)(he)流化態(tai)輸(shu)(shu)(shu)(shu)送(song)(song)系統. 除此之外,根據喂料不(bu)同(tong)分(fen)(fen)(fen)為連(lian)續和(he)(he)批次輸(shu)(shu)(shu)(shu)送(song)(song). 在(zai)高壓(ya)密相輸(shu)(shu)(shu)(shu)送(song)(song)技術中常采用批次的壓(ya)力罐進行高壓(ya)輸(shu)(shu)(shu)(shu)送(song)(song), 同(tong)時, 可以組合(he)兩(liang)個(ge)壓(ya)力罐設計(ji)達到連(lian)續的輸(shu)(shu)(shu)(shu)送(song)(song).

密(mi)相氣力輸送特點:

● 用氣量小(xiao), 節能

● 無殘留輸送

● 不堵(du)塞, 運行可(ke)靠

● 維護費用低

● 適合于(yu)各類粉(fen)粒(li)物料

● 壓力至0. 6m p a可調

● 適(shi)合于柔性化自(zi)動(dong)生產中的物料高(gao)效輸送(song)