密相氣力輸送系列

氣力(li)輸送(song)原理

氣力(li)(li)(li)輸(shu)(shu)(shu)送(song)(song)(song)系(xi)統(tong)可(ke)分(fen)類為(wei)不(bu)同(tong)的(de)(de)(de)(de)(de)(de)流動型(xing)式(shi)(shi)，其中兩種(zhong)主要型(xing)式(shi)(shi)是(shi)(shi)：(a) 稀(xi)(xi)相(xiang)(xiang)(xiang)(xiang)輸(shu)(shu)(shu)送(song)(song)(song)和（b）密相(xiang)(xiang)(xiang)(xiang)輸(shu)(shu)(shu)送(song)(song)(song)每種(zhong)流動型(xing)式(shi)(shi)可(ke)按(an)物(wu)料與空氣的(de)(de)(de)(de)(de)(de)流量(liang)比(bi)率(lv)大小分(fen)類，其比(bi)率(lv)也(ye)被(bei)(bei)(bei)稱為(wei)“固氣比(bi)”： μ=ms/mf (1)許多稀(xi)(xi)相(xiang)(xiang)(xiang)(xiang)的(de)(de)(de)(de)(de)(de)運(yun)行范(fan)圍為(wei)0＜μ＜15，而密相(xiang)(xiang)(xiang)(xiang)通(tong)常(chang)是(shi)(shi)μ＞15。圖(tu)1所示(shi)的(de)(de)(de)(de)(de)(de)是(shi)(shi)典型(xing)輸(shu)(shu)(shu)送(song)(song)(song)狀(zhuang)態圖(tu)。稀(xi)(xi)相(xiang)(xiang)(xiang)(xiang)輸(shu)(shu)(shu)送(song)(song)(song)可(ke)以(yi)被(bei)(bei)(bei)認(ren)(ren)為(wei)是(shi)(shi)一種(zhong)完(wan)全(quan)的(de)(de)(de)(de)(de)(de)懸(xuan)浮(fu)流，而密相(xiang)(xiang)(xiang)(xiang)輸(shu)(shu)(shu)送(song)(song)(song)通(tong)常(chang)被(bei)(bei)(bei)認(ren)(ren)為(wei)是(shi)(shi)非懸(xuan)浮(fu)流。然(ran)而，如圖(tu)1所示(shi)，許多不(bu)同(tong)種(zhong)類的(de)(de)(de)(de)(de)(de)密相(xiang)(xiang)(xiang)(xiang)（非懸(xuan)浮(fu)流）依靠散料的(de)(de)(de)(de)(de)(de)料性和流動性存(cun)在。密相(xiang)(xiang)(xiang)(xiang)輸(shu)(shu)(shu)送(song)(song)(song)同(tong)樣也(ye)能被(bei)(bei)(bei)定義(yi)為(wei)輸(shu)(shu)(shu)送(song)(song)(song)物(wu)料完(wan)全(quan)填(tian)(tian)滿管(guan)(guan)道(dao)(dao)截(jie)面(mian)(mian)的(de)(de)(de)(de)(de)(de)一種(zhong)輸(shu)(shu)(shu)送(song)(song)(song)方(fang)式(shi)(shi)。稀(xi)(xi)相(xiang)(xiang)(xiang)(xiang)輸(shu)(shu)(shu)送(song)(song)(song)通(tong)常(chang)需(xu)要使用大量(liang)的(de)(de)(de)(de)(de)(de)高(gao)速(su)(su)(su)氣體(ti)。氣流依靠升力(li)(li)(li)和推動力(li)(li)(li)以(yi)離散粒(li)子的(de)(de)(de)(de)(de)(de)形式(shi)(shi)攜帶著物(wu)料。參考(kao)圖(tu)1中所述(shu)的(de)(de)(de)(de)(de)(de)“懸(xuan)浮(fu)流”，稀(xi)(xi)相(xiang)(xiang)(xiang)(xiang)系(xi)統(tong)通(tong)常(chang)是(shi)(shi)最(zui)為(wei)被(bei)(bei)(bei)廣泛應用的(de)(de)(de)(de)(de)(de)氣力(li)(li)(li)輸(shu)(shu)(shu)送(song)(song)(song)系(xi)統(tong)。由于(yu)稀(xi)(xi)相(xiang)(xiang)(xiang)(xiang)系(xi)統(tong)設計的(de)(de)(de)(de)(de)(de)相(xiang)(xiang)(xiang)(xiang)對簡單性，它們同(tong)時也(ye)被(bei)(bei)(bei)頻繁的(de)(de)(de)(de)(de)(de)應用在工業領域。輸(shu)(shu)(shu)送(song)(song)(song)氣體(ti)的(de)(de)(de)(de)(de)(de)速(su)(su)(su)度減少到比(bi)保持粒(li)子懸(xuan)浮(fu)狀(zhuang)態的(de)(de)(de)(de)(de)(de)臨(lin)界值更小時，導致(zhi)物(wu)料在輸(shu)(shu)(shu)送(song)(song)(song)管(guan)(guan)道(dao)(dao)的(de)(de)(de)(de)(de)(de)橫截(jie)面(mian)(mian)形成不(bu)均勻的(de)(de)(de)(de)(de)(de)分(fen)布。臨(lin)界氣體(ti)速(su)(su)(su)度被(bei)(bei)(bei)稱為(wei)是(shi)(shi)水(shui)平(ping)輸(shu)(shu)(shu)送(song)(song)(song)的(de)(de)(de)(de)(de)(de)跳躍速(su)(su)(su)度，垂(chui)直輸(shu)(shu)(shu)送(song)(song)(song)時堵塞。當水(shui)平(ping)管(guan)(guan)道(dao)(dao)中的(de)(de)(de)(de)(de)(de)物(wu)料表面(mian)(mian)氣體(ti)速(su)(su)(su)度低于(yu)突變速(su)(su)(su)度時，輸(shu)(shu)(shu)送(song)(song)(song)將會以(yi)低流量(liang)通(tong)過管(guan)(guan)道(dao)(dao)橫截(jie)面(mian)(mian)的(de)(de)(de)(de)(de)(de)上部，在管(guan)(guan)道(dao)(dao)的(de)(de)(de)(de)(de)(de)剩(sheng)余部分(fen)以(yi)高(gao)濃度低速(su)(su)(su)度的(de)(de)(de)(de)(de)(de)形式(shi)(shi)填(tian)(tian)充(chong)。有(you)時沿(yan)管(guan)(guan)道(dao)(dao)的(de)(de)(de)(de)(de)(de)橫截(jie)面(mian)(mian)會被(bei)(bei)(bei)填(tian)(tian)滿，而有(you)時只是(shi)(shi)部分(fen)被(bei)(bei)(bei)填(tian)(tian)滿.

實際應(ying)用中(zhong), 按照(zhao)氣力(li)驅(qu)動形式(shi)可以分為(wei)負壓(ya)(ya)(ya)和正壓(ya)(ya)(ya)氣力(li)輸(shu)(shu)(shu)送, 在這兩(liang)種輸(shu)(shu)(shu)送系統中(zhong), 根(gen)(gen)據(ju)(ju)流動狀態(tai)圖(tu)再區分分為(wei)稀相(xiang), 密(mi)相(xiang)和流化態(tai)輸(shu)(shu)(shu)送系統. 除此之(zhi)外(wai),根(gen)(gen)據(ju)(ju)喂(wei)料不同分為(wei)連(lian)續(xu)和批次(ci)輸(shu)(shu)(shu)送. 在高(gao)壓(ya)(ya)(ya)密(mi)相(xiang)輸(shu)(shu)(shu)送技術中(zhong)常(chang)采(cai)用批次(ci)的壓(ya)(ya)(ya)力(li)罐(guan)(guan)進行高(gao)壓(ya)(ya)(ya)輸(shu)(shu)(shu)送, 同時, 可以組(zu)合(he)兩(liang)個(ge)壓(ya)(ya)(ya)力(li)罐(guan)(guan)設計達到(dao)連(lian)續(xu)的輸(shu)(shu)(shu)送.

密(mi)相氣力輸送特點:

● 用(yong)氣量小, 節能(neng)

● 無殘留輸送

● 不(bu)堵塞, 運行可靠(kao)

● 維護費用低

● 適合于各類粉粒物料

● 壓力至0. 6m p a可調

● 適合于(yu)柔性化自動生產中的物料高效輸(shu)送