密相氣力輸送系列

氣力輸(shu)送原理

氣力輸(shu)(shu)(shu)送(song)(song)(song)系(xi)統可分類(lei)為(wei)不同(tong)(tong)(tong)的(de)(de)(de)(de)(de)流(liu)動型(xing)式(shi)，其(qi)中(zhong)兩種(zhong)主要(yao)型(xing)式(shi)是(shi)(shi)(shi)(shi)：(a) 稀相(xiang)(xiang)(xiang)輸(shu)(shu)(shu)送(song)(song)(song)和(he)（b）密(mi)相(xiang)(xiang)(xiang)輸(shu)(shu)(shu)送(song)(song)(song)每(mei)種(zhong)流(liu)動型(xing)式(shi)可按(an)物料(liao)(liao)與空氣的(de)(de)(de)(de)(de)流(liu)量比(bi)(bi)率大(da)小分類(lei)，其(qi)比(bi)(bi)率也被(bei)稱(cheng)為(wei)“固氣比(bi)(bi)”： μ=ms/mf (1)許多稀相(xiang)(xiang)(xiang)的(de)(de)(de)(de)(de)運行(xing)范圍為(wei)0＜μ＜15，而(er)(er)(er)密(mi)相(xiang)(xiang)(xiang)通常是(shi)(shi)(shi)(shi)μ＞15。圖(tu)1所示(shi)的(de)(de)(de)(de)(de)是(shi)(shi)(shi)(shi)典型(xing)輸(shu)(shu)(shu)送(song)(song)(song)狀態(tai)圖(tu)。稀相(xiang)(xiang)(xiang)輸(shu)(shu)(shu)送(song)(song)(song)可以(yi)被(bei)認(ren)為(wei)是(shi)(shi)(shi)(shi)一(yi)種(zhong)完全的(de)(de)(de)(de)(de)懸(xuan)浮(fu)流(liu)，而(er)(er)(er)密(mi)相(xiang)(xiang)(xiang)輸(shu)(shu)(shu)送(song)(song)(song)通常被(bei)認(ren)為(wei)是(shi)(shi)(shi)(shi)非懸(xuan)浮(fu)流(liu)。然(ran)而(er)(er)(er)，如圖(tu)1所示(shi)，許多不同(tong)(tong)(tong)種(zhong)類(lei)的(de)(de)(de)(de)(de)密(mi)相(xiang)(xiang)(xiang)（非懸(xuan)浮(fu)流(liu)）依靠散料(liao)(liao)的(de)(de)(de)(de)(de)料(liao)(liao)性(xing)和(he)流(liu)動性(xing)存在(zai)。密(mi)相(xiang)(xiang)(xiang)輸(shu)(shu)(shu)送(song)(song)(song)同(tong)(tong)(tong)樣也能(neng)被(bei)定義為(wei)輸(shu)(shu)(shu)送(song)(song)(song)物料(liao)(liao)完全填滿管(guan)(guan)道(dao)(dao)截(jie)面(mian)(mian)(mian)的(de)(de)(de)(de)(de)一(yi)種(zhong)輸(shu)(shu)(shu)送(song)(song)(song)方式(shi)。稀相(xiang)(xiang)(xiang)輸(shu)(shu)(shu)送(song)(song)(song)通常需要(yao)使用(yong)大(da)量的(de)(de)(de)(de)(de)高(gao)速(su)(su)(su)(su)氣體(ti)。氣流(liu)依靠升力和(he)推動力以(yi)離(li)散粒子的(de)(de)(de)(de)(de)形式(shi)攜帶著物料(liao)(liao)。參考圖(tu)1中(zhong)所述(shu)的(de)(de)(de)(de)(de)“懸(xuan)浮(fu)流(liu)”，稀相(xiang)(xiang)(xiang)系(xi)統通常是(shi)(shi)(shi)(shi)最為(wei)被(bei)廣泛應用(yong)的(de)(de)(de)(de)(de)氣力輸(shu)(shu)(shu)送(song)(song)(song)系(xi)統。由于稀相(xiang)(xiang)(xiang)系(xi)統設計的(de)(de)(de)(de)(de)相(xiang)(xiang)(xiang)對(dui)簡單性(xing)，它們同(tong)(tong)(tong)時也被(bei)頻(pin)繁的(de)(de)(de)(de)(de)應用(yong)在(zai)工業領域。輸(shu)(shu)(shu)送(song)(song)(song)氣體(ti)的(de)(de)(de)(de)(de)速(su)(su)(su)(su)度(du)減少到比(bi)(bi)保持粒子懸(xuan)浮(fu)狀態(tai)的(de)(de)(de)(de)(de)臨界(jie)值(zhi)更小時，導致物料(liao)(liao)在(zai)輸(shu)(shu)(shu)送(song)(song)(song)管(guan)(guan)道(dao)(dao)的(de)(de)(de)(de)(de)橫(heng)(heng)截(jie)面(mian)(mian)(mian)形成不均勻的(de)(de)(de)(de)(de)分布。臨界(jie)氣體(ti)速(su)(su)(su)(su)度(du)被(bei)稱(cheng)為(wei)是(shi)(shi)(shi)(shi)水平(ping)輸(shu)(shu)(shu)送(song)(song)(song)的(de)(de)(de)(de)(de)跳躍(yue)速(su)(su)(su)(su)度(du)，垂直輸(shu)(shu)(shu)送(song)(song)(song)時堵(du)塞。當水平(ping)管(guan)(guan)道(dao)(dao)中(zhong)的(de)(de)(de)(de)(de)物料(liao)(liao)表面(mian)(mian)(mian)氣體(ti)速(su)(su)(su)(su)度(du)低于突變速(su)(su)(su)(su)度(du)時，輸(shu)(shu)(shu)送(song)(song)(song)將會以(yi)低流(liu)量通過管(guan)(guan)道(dao)(dao)橫(heng)(heng)截(jie)面(mian)(mian)(mian)的(de)(de)(de)(de)(de)上部(bu)，在(zai)管(guan)(guan)道(dao)(dao)的(de)(de)(de)(de)(de)剩余部(bu)分以(yi)高(gao)濃度(du)低速(su)(su)(su)(su)度(du)的(de)(de)(de)(de)(de)形式(shi)填充(chong)。有(you)時沿管(guan)(guan)道(dao)(dao)的(de)(de)(de)(de)(de)橫(heng)(heng)截(jie)面(mian)(mian)(mian)會被(bei)填滿，而(er)(er)(er)有(you)時只是(shi)(shi)(shi)(shi)部(bu)分被(bei)填滿.

實際應用中(zhong), 按照氣力(li)驅動形式可以分(fen)為負(fu)壓(ya)和(he)正(zheng)壓(ya)氣力(li)輸(shu)送(song), 在(zai)(zai)這兩種輸(shu)送(song)系(xi)統中(zhong), 根(gen)據流動狀態圖再區分(fen)分(fen)為稀(xi)相, 密(mi)(mi)相和(he)流化態輸(shu)送(song)系(xi)統. 除此之外(wai),根(gen)據喂料不(bu)同分(fen)為連(lian)續和(he)批次(ci)輸(shu)送(song). 在(zai)(zai)高壓(ya)密(mi)(mi)相輸(shu)送(song)技術(shu)中(zhong)常采(cai)用批次(ci)的壓(ya)力(li)罐進行高壓(ya)輸(shu)送(song), 同時(shi), 可以組(zu)合兩個壓(ya)力(li)罐設(she)計達到連(lian)續的輸(shu)送(song).

密相(xiang)氣力(li)輸送特點:

● 用氣量(liang)小, 節能

● 無殘留輸送

● 不堵塞, 運行可靠

● 維護費用低

● 適合于各(ge)類粉(fen)粒物料

● 壓力至0. 6m p a可調

● 適合于柔(rou)性(xing)化自動生產(chan)中的(de)物料高效輸(shu)送(song)