密相氣力輸送(song)系(xi)列

氣力輸送原理(li)

氣(qi)力(li)輸(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)系統(tong)可分類(lei)為(wei)(wei)(wei)不同(tong)(tong)的(de)(de)(de)(de)流(liu)(liu)(liu)動(dong)型式，其中兩(liang)種(zhong)主要型式是(shi)(shi)(shi)：(a) 稀(xi)相輸(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)和(he)（b）密(mi)相輸(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)每種(zhong)流(liu)(liu)(liu)動(dong)型式可按(an)物料與空氣(qi)的(de)(de)(de)(de)流(liu)(liu)(liu)量比(bi)率大小分類(lei)，其比(bi)率也(ye)(ye)被(bei)稱為(wei)(wei)(wei)“固氣(qi)比(bi)”： μ=ms/mf (1)許(xu)多稀(xi)相的(de)(de)(de)(de)運行范圍為(wei)(wei)(wei)0＜μ＜15，而(er)(er)(er)密(mi)相通(tong)常(chang)(chang)是(shi)(shi)(shi)μ＞15。圖(tu)(tu)1所示(shi)(shi)的(de)(de)(de)(de)是(shi)(shi)(shi)典型輸(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)狀態圖(tu)(tu)。稀(xi)相輸(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)可以被(bei)認(ren)為(wei)(wei)(wei)是(shi)(shi)(shi)一種(zhong)完全的(de)(de)(de)(de)懸(xuan)浮(fu)流(liu)(liu)(liu)，而(er)(er)(er)密(mi)相輸(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)通(tong)常(chang)(chang)被(bei)認(ren)為(wei)(wei)(wei)是(shi)(shi)(shi)非(fei)懸(xuan)浮(fu)流(liu)(liu)(liu)。然而(er)(er)(er)，如圖(tu)(tu)1所示(shi)(shi)，許(xu)多不同(tong)(tong)種(zhong)類(lei)的(de)(de)(de)(de)密(mi)相（非(fei)懸(xuan)浮(fu)流(liu)(liu)(liu)）依(yi)靠散(san)料的(de)(de)(de)(de)料性(xing)和(he)流(liu)(liu)(liu)動(dong)性(xing)存在(zai)。密(mi)相輸(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)同(tong)(tong)樣也(ye)(ye)能(neng)被(bei)定義為(wei)(wei)(wei)輸(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)物料完全填(tian)滿(man)管(guan)道截(jie)(jie)面(mian)(mian)的(de)(de)(de)(de)一種(zhong)輸(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)方式。稀(xi)相輸(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)通(tong)常(chang)(chang)需要使用大量的(de)(de)(de)(de)高(gao)速(su)(su)(su)氣(qi)體(ti)。氣(qi)流(liu)(liu)(liu)依(yi)靠升(sheng)力(li)和(he)推動(dong)力(li)以離散(san)粒子的(de)(de)(de)(de)形式攜帶著(zhu)物料。參考(kao)圖(tu)(tu)1中所述的(de)(de)(de)(de)“懸(xuan)浮(fu)流(liu)(liu)(liu)”，稀(xi)相系統(tong)通(tong)常(chang)(chang)是(shi)(shi)(shi)最為(wei)(wei)(wei)被(bei)廣泛應用的(de)(de)(de)(de)氣(qi)力(li)輸(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)系統(tong)。由(you)于稀(xi)相系統(tong)設計(ji)的(de)(de)(de)(de)相對簡單性(xing)，它(ta)們同(tong)(tong)時也(ye)(ye)被(bei)頻繁的(de)(de)(de)(de)應用在(zai)工(gong)業領(ling)域(yu)。輸(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)氣(qi)體(ti)的(de)(de)(de)(de)速(su)(su)(su)度(du)減少到比(bi)保持粒子懸(xuan)浮(fu)狀態的(de)(de)(de)(de)臨界值更小時，導(dao)致物料在(zai)輸(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)管(guan)道的(de)(de)(de)(de)橫截(jie)(jie)面(mian)(mian)形成不均(jun)勻的(de)(de)(de)(de)分布。臨界氣(qi)體(ti)速(su)(su)(su)度(du)被(bei)稱為(wei)(wei)(wei)是(shi)(shi)(shi)水(shui)平輸(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)的(de)(de)(de)(de)跳(tiao)躍(yue)速(su)(su)(su)度(du)，垂直輸(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)時堵塞。當水(shui)平管(guan)道中的(de)(de)(de)(de)物料表面(mian)(mian)氣(qi)體(ti)速(su)(su)(su)度(du)低于突變速(su)(su)(su)度(du)時，輸(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)將(jiang)會以低流(liu)(liu)(liu)量通(tong)過管(guan)道橫截(jie)(jie)面(mian)(mian)的(de)(de)(de)(de)上部(bu)(bu)，在(zai)管(guan)道的(de)(de)(de)(de)剩余部(bu)(bu)分以高(gao)濃度(du)低速(su)(su)(su)度(du)的(de)(de)(de)(de)形式填(tian)充。有(you)時沿(yan)管(guan)道的(de)(de)(de)(de)橫截(jie)(jie)面(mian)(mian)會被(bei)填(tian)滿(man)，而(er)(er)(er)有(you)時只是(shi)(shi)(shi)部(bu)(bu)分被(bei)填(tian)滿(man).

實際應用中, 按(an)照氣力(li)驅動(dong)形(xing)式可(ke)以分(fen)(fen)為(wei)(wei)負(fu)壓(ya)(ya)和正壓(ya)(ya)氣力(li)輸(shu)(shu)送(song)(song)(song)(song), 在這兩種輸(shu)(shu)送(song)(song)(song)(song)系統中, 根據流(liu)動(dong)狀(zhuang)態圖再區分(fen)(fen)分(fen)(fen)為(wei)(wei)稀相(xiang), 密(mi)相(xiang)和流(liu)化(hua)態輸(shu)(shu)送(song)(song)(song)(song)系統. 除此(ci)之外,根據喂料不(bu)同分(fen)(fen)為(wei)(wei)連續(xu)和批次(ci)輸(shu)(shu)送(song)(song)(song)(song). 在高(gao)(gao)壓(ya)(ya)密(mi)相(xiang)輸(shu)(shu)送(song)(song)(song)(song)技術中常采用批次(ci)的壓(ya)(ya)力(li)罐(guan)進行高(gao)(gao)壓(ya)(ya)輸(shu)(shu)送(song)(song)(song)(song), 同時, 可(ke)以組(zu)合兩個壓(ya)(ya)力(li)罐(guan)設(she)計達(da)到連續(xu)的輸(shu)(shu)送(song)(song)(song)(song).

密相氣力輸送特(te)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(shi)合于各類(lei)粉粒物料

● 壓(ya)力至0. 6m p a可調(diao)

● 適合于柔性化(hua)自動生產(chan)中的物料高效(xiao)輸送