密相氣(qi)力輸(shu)送系列

氣(qi)力輸送原理

氣(qi)力輸(shu)(shu)(shu)送(song)(song)(song)系(xi)(xi)(xi)統(tong)(tong)可(ke)分(fen)(fen)類(lei)為(wei)不同(tong)的(de)(de)(de)流動型(xing)式，其(qi)中(zhong)兩種(zhong)主(zhu)要(yao)型(xing)式是(shi)(shi)：(a) 稀(xi)相(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)輸(shu)(shu)(shu)送(song)(song)(song)和(he)（b）密(mi)(mi)相(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)輸(shu)(shu)(shu)送(song)(song)(song)每種(zhong)流動型(xing)式可(ke)按物(wu)料與空(kong)氣(qi)的(de)(de)(de)流量比(bi)(bi)率大小分(fen)(fen)類(lei)，其(qi)比(bi)(bi)率也(ye)被(bei)(bei)(bei)稱為(wei)“固氣(qi)比(bi)(bi)”： μ=ms/mf (1)許多(duo)稀(xi)相(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)的(de)(de)(de)運行范(fan)圍(wei)為(wei)0＜μ＜15，而密(mi)(mi)相(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)通常(chang)是(shi)(shi)μ＞15。圖(tu)(tu)1所示(shi)的(de)(de)(de)是(shi)(shi)典型(xing)輸(shu)(shu)(shu)送(song)(song)(song)狀態圖(tu)(tu)。稀(xi)相(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)輸(shu)(shu)(shu)送(song)(song)(song)可(ke)以被(bei)(bei)(bei)認為(wei)是(shi)(shi)一種(zhong)完全的(de)(de)(de)懸浮(fu)流，而密(mi)(mi)相(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)輸(shu)(shu)(shu)送(song)(song)(song)通常(chang)被(bei)(bei)(bei)認為(wei)是(shi)(shi)非懸浮(fu)流。然而，如(ru)圖(tu)(tu)1所示(shi)，許多(duo)不同(tong)種(zhong)類(lei)的(de)(de)(de)密(mi)(mi)相(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)（非懸浮(fu)流）依靠散料的(de)(de)(de)料性(xing)(xing)和(he)流動性(xing)(xing)存(cun)在(zai)。密(mi)(mi)相(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)輸(shu)(shu)(shu)送(song)(song)(song)同(tong)樣也(ye)能(neng)被(bei)(bei)(bei)定義為(wei)輸(shu)(shu)(shu)送(song)(song)(song)物(wu)料完全填(tian)滿管(guan)(guan)(guan)道(dao)截(jie)面(mian)(mian)(mian)的(de)(de)(de)一種(zhong)輸(shu)(shu)(shu)送(song)(song)(song)方式。稀(xi)相(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)輸(shu)(shu)(shu)送(song)(song)(song)通常(chang)需(xu)要(yao)使用(yong)大量的(de)(de)(de)高速(su)(su)(su)氣(qi)體(ti)。氣(qi)流依靠升力和(he)推(tui)動力以離散粒子的(de)(de)(de)形式攜(xie)帶著物(wu)料。參考圖(tu)(tu)1中(zhong)所述的(de)(de)(de)“懸浮(fu)流”，稀(xi)相(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)系(xi)(xi)(xi)統(tong)(tong)通常(chang)是(shi)(shi)最為(wei)被(bei)(bei)(bei)廣泛應(ying)用(yong)的(de)(de)(de)氣(qi)力輸(shu)(shu)(shu)送(song)(song)(song)系(xi)(xi)(xi)統(tong)(tong)。由于(yu)稀(xi)相(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)系(xi)(xi)(xi)統(tong)(tong)設計的(de)(de)(de)相(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)(xiang)對簡單性(xing)(xing)，它們同(tong)時(shi)(shi)也(ye)被(bei)(bei)(bei)頻繁的(de)(de)(de)應(ying)用(yong)在(zai)工業領域。輸(shu)(shu)(shu)送(song)(song)(song)氣(qi)體(ti)的(de)(de)(de)速(su)(su)(su)度(du)減少(shao)到比(bi)(bi)保持粒子懸浮(fu)狀態的(de)(de)(de)臨界(jie)值更(geng)小時(shi)(shi)，導致物(wu)料在(zai)輸(shu)(shu)(shu)送(song)(song)(song)管(guan)(guan)(guan)道(dao)的(de)(de)(de)橫(heng)截(jie)面(mian)(mian)(mian)形成不均勻的(de)(de)(de)分(fen)(fen)布。臨界(jie)氣(qi)體(ti)速(su)(su)(su)度(du)被(bei)(bei)(bei)稱為(wei)是(shi)(shi)水平輸(shu)(shu)(shu)送(song)(song)(song)的(de)(de)(de)跳躍速(su)(su)(su)度(du)，垂直輸(shu)(shu)(shu)送(song)(song)(song)時(shi)(shi)堵塞。當水平管(guan)(guan)(guan)道(dao)中(zhong)的(de)(de)(de)物(wu)料表面(mian)(mian)(mian)氣(qi)體(ti)速(su)(su)(su)度(du)低于(yu)突(tu)變速(su)(su)(su)度(du)時(shi)(shi)，輸(shu)(shu)(shu)送(song)(song)(song)將會以低流量通過管(guan)(guan)(guan)道(dao)橫(heng)截(jie)面(mian)(mian)(mian)的(de)(de)(de)上部，在(zai)管(guan)(guan)(guan)道(dao)的(de)(de)(de)剩余部分(fen)(fen)以高濃(nong)度(du)低速(su)(su)(su)度(du)的(de)(de)(de)形式填(tian)充。有時(shi)(shi)沿管(guan)(guan)(guan)道(dao)的(de)(de)(de)橫(heng)截(jie)面(mian)(mian)(mian)會被(bei)(bei)(bei)填(tian)滿，而有時(shi)(shi)只是(shi)(shi)部分(fen)(fen)被(bei)(bei)(bei)填(tian)滿.

實際應用中, 按照氣(qi)力(li)(li)驅動(dong)形式(shi)可以分為負壓(ya)和(he)正壓(ya)氣(qi)力(li)(li)輸送(song), 在這兩(liang)種(zhong)輸送(song)系統(tong)中, 根據流動(dong)狀態(tai)(tai)圖再區分分為稀(xi)相, 密相和(he)流化態(tai)(tai)輸送(song)系統(tong). 除此之(zhi)外,根據喂料不同分為連續和(he)批(pi)次(ci)輸送(song). 在高壓(ya)密相輸送(song)技術(shu)中常采用批(pi)次(ci)的壓(ya)力(li)(li)罐進行(xing)高壓(ya)輸送(song), 同時, 可以組合(he)兩(liang)個(ge)壓(ya)力(li)(li)罐設計(ji)達(da)到連續的輸送(song).

密相(xiang)氣力輸送特點(dian):

● 用氣量小, 節能

● 無殘留輸送

● 不堵塞, 運行可靠

● 維護費用低

● 適合于各類粉粒物料

● 壓(ya)力至(zhi)0. 6m p a可調

● 適合(he)于柔性(xing)化自動生產中(zhong)的物料高效輸送