密相氣力輸送系列

氣力輸送原理

氣(qi)(qi)力(li)(li)輸(shu)(shu)送(song)(song)(song)(song)(song)系(xi)(xi)統可(ke)分類為(wei)(wei)不同(tong)的(de)(de)(de)流動(dong)型(xing)式(shi)(shi)，其中兩種(zhong)(zhong)主要型(xing)式(shi)(shi)是(shi)(shi)(shi)(shi)：(a) 稀(xi)相(xiang)(xiang)輸(shu)(shu)送(song)(song)(song)(song)(song)和(he)(he)（b）密(mi)相(xiang)(xiang)輸(shu)(shu)送(song)(song)(song)(song)(song)每種(zhong)(zhong)流動(dong)型(xing)式(shi)(shi)可(ke)按物料與空氣(qi)(qi)的(de)(de)(de)流量比率大小分類，其比率也被(bei)稱為(wei)(wei)“固氣(qi)(qi)比”： μ=ms/mf (1)許(xu)(xu)多稀(xi)相(xiang)(xiang)的(de)(de)(de)運行范圍(wei)為(wei)(wei)0＜μ＜15，而密(mi)相(xiang)(xiang)通常(chang)是(shi)(shi)(shi)(shi)μ＞15。圖1所(suo)示的(de)(de)(de)是(shi)(shi)(shi)(shi)典型(xing)輸(shu)(shu)送(song)(song)(song)(song)(song)狀態圖。稀(xi)相(xiang)(xiang)輸(shu)(shu)送(song)(song)(song)(song)(song)可(ke)以被(bei)認為(wei)(wei)是(shi)(shi)(shi)(shi)一種(zhong)(zhong)完全的(de)(de)(de)懸(xuan)浮(fu)(fu)流，而密(mi)相(xiang)(xiang)輸(shu)(shu)送(song)(song)(song)(song)(song)通常(chang)被(bei)認為(wei)(wei)是(shi)(shi)(shi)(shi)非懸(xuan)浮(fu)(fu)流。然而，如(ru)圖1所(suo)示，許(xu)(xu)多不同(tong)種(zhong)(zhong)類的(de)(de)(de)密(mi)相(xiang)(xiang)（非懸(xuan)浮(fu)(fu)流）依(yi)靠(kao)散料的(de)(de)(de)料性和(he)(he)流動(dong)性存在(zai)。密(mi)相(xiang)(xiang)輸(shu)(shu)送(song)(song)(song)(song)(song)同(tong)樣(yang)也能被(bei)定義為(wei)(wei)輸(shu)(shu)送(song)(song)(song)(song)(song)物料完全填滿(man)管(guan)(guan)道(dao)截(jie)面(mian)的(de)(de)(de)一種(zhong)(zhong)輸(shu)(shu)送(song)(song)(song)(song)(song)方(fang)式(shi)(shi)。稀(xi)相(xiang)(xiang)輸(shu)(shu)送(song)(song)(song)(song)(song)通常(chang)需要使用大量的(de)(de)(de)高速(su)(su)氣(qi)(qi)體。氣(qi)(qi)流依(yi)靠(kao)升(sheng)力(li)(li)和(he)(he)推動(dong)力(li)(li)以離散粒子的(de)(de)(de)形(xing)式(shi)(shi)攜(xie)帶(dai)著物料。參考(kao)圖1中所(suo)述(shu)的(de)(de)(de)“懸(xuan)浮(fu)(fu)流”，稀(xi)相(xiang)(xiang)系(xi)(xi)統通常(chang)是(shi)(shi)(shi)(shi)最為(wei)(wei)被(bei)廣泛(fan)應用的(de)(de)(de)氣(qi)(qi)力(li)(li)輸(shu)(shu)送(song)(song)(song)(song)(song)系(xi)(xi)統。由于(yu)稀(xi)相(xiang)(xiang)系(xi)(xi)統設計的(de)(de)(de)相(xiang)(xiang)對簡(jian)單(dan)性，它們同(tong)時(shi)也被(bei)頻繁的(de)(de)(de)應用在(zai)工(gong)業領域(yu)。輸(shu)(shu)送(song)(song)(song)(song)(song)氣(qi)(qi)體的(de)(de)(de)速(su)(su)度減少到比保(bao)持粒子懸(xuan)浮(fu)(fu)狀態的(de)(de)(de)臨界值更小時(shi)，導致物料在(zai)輸(shu)(shu)送(song)(song)(song)(song)(song)管(guan)(guan)道(dao)的(de)(de)(de)橫(heng)截(jie)面(mian)形(xing)成不均勻的(de)(de)(de)分布(bu)。臨界氣(qi)(qi)體速(su)(su)度被(bei)稱為(wei)(wei)是(shi)(shi)(shi)(shi)水平輸(shu)(shu)送(song)(song)(song)(song)(song)的(de)(de)(de)跳(tiao)躍速(su)(su)度，垂直輸(shu)(shu)送(song)(song)(song)(song)(song)時(shi)堵塞。當水平管(guan)(guan)道(dao)中的(de)(de)(de)物料表面(mian)氣(qi)(qi)體速(su)(su)度低(di)于(yu)突變速(su)(su)度時(shi)，輸(shu)(shu)送(song)(song)(song)(song)(song)將(jiang)會(hui)以低(di)流量通過管(guan)(guan)道(dao)橫(heng)截(jie)面(mian)的(de)(de)(de)上部，在(zai)管(guan)(guan)道(dao)的(de)(de)(de)剩(sheng)余部分以高濃度低(di)速(su)(su)度的(de)(de)(de)形(xing)式(shi)(shi)填充。有(you)時(shi)沿(yan)管(guan)(guan)道(dao)的(de)(de)(de)橫(heng)截(jie)面(mian)會(hui)被(bei)填滿(man)，而有(you)時(shi)只(zhi)是(shi)(shi)(shi)(shi)部分被(bei)填滿(man).

實際應用中(zhong), 按照氣力(li)(li)驅動形式可(ke)以(yi)分(fen)(fen)為負壓(ya)(ya)和(he)(he)正壓(ya)(ya)氣力(li)(li)輸(shu)送(song), 在(zai)這(zhe)兩種輸(shu)送(song)系統中(zhong), 根(gen)(gen)據流動狀態圖再(zai)區分(fen)(fen)分(fen)(fen)為稀相(xiang), 密相(xiang)和(he)(he)流化態輸(shu)送(song)系統. 除此之外,根(gen)(gen)據喂料不同(tong)分(fen)(fen)為連(lian)續(xu)(xu)和(he)(he)批(pi)次輸(shu)送(song). 在(zai)高壓(ya)(ya)密相(xiang)輸(shu)送(song)技術(shu)中(zhong)常采用批(pi)次的壓(ya)(ya)力(li)(li)罐(guan)進行高壓(ya)(ya)輸(shu)送(song), 同(tong)時, 可(ke)以(yi)組(zu)合兩個壓(ya)(ya)力(li)(li)罐(guan)設(she)計達到連(lian)續(xu)(xu)的輸(shu)送(song).

密相氣(qi)力輸送特點:

● 用氣量小(xiao), 節能(neng)

● 無殘留輸送

● 不堵塞(sai), 運行可(ke)靠

● 維(wei)護費用低

● 適合(he)于各類粉粒物料

● 壓力至0. 6m p a可調

● 適合于(yu)柔性化自動生產中(zhong)的物料高效輸(shu)送