密(mi)相氣力輸送系列

氣力輸送原理

氣(qi)(qi)(qi)力輸(shu)(shu)送(song)(song)系統可(ke)分類(lei)(lei)為不(bu)同的(de)(de)(de)流(liu)(liu)動型式，其中(zhong)兩(liang)種(zhong)(zhong)主要(yao)型式是(shi)：(a) 稀(xi)相(xiang)輸(shu)(shu)送(song)(song)和(he)（b）密(mi)相(xiang)輸(shu)(shu)送(song)(song)每(mei)種(zhong)(zhong)流(liu)(liu)動型式可(ke)按(an)物料(liao)與空氣(qi)(qi)(qi)的(de)(de)(de)流(liu)(liu)量比(bi)率大小(xiao)(xiao)分類(lei)(lei)，其比(bi)率也(ye)(ye)被稱為“固氣(qi)(qi)(qi)比(bi)”： μ=ms/mf (1)許(xu)多稀(xi)相(xiang)的(de)(de)(de)運行范圍為0＜μ＜15，而(er)密(mi)相(xiang)通常(chang)是(shi)μ＞15。圖(tu)1所(suo)示的(de)(de)(de)是(shi)典型輸(shu)(shu)送(song)(song)狀態(tai)(tai)圖(tu)。稀(xi)相(xiang)輸(shu)(shu)送(song)(song)可(ke)以被認(ren)為是(shi)一種(zhong)(zhong)完全(quan)的(de)(de)(de)懸(xuan)(xuan)浮流(liu)(liu)，而(er)密(mi)相(xiang)輸(shu)(shu)送(song)(song)通常(chang)被認(ren)為是(shi)非(fei)懸(xuan)(xuan)浮流(liu)(liu)。然而(er)，如圖(tu)1所(suo)示，許(xu)多不(bu)同種(zhong)(zhong)類(lei)(lei)的(de)(de)(de)密(mi)相(xiang)（非(fei)懸(xuan)(xuan)浮流(liu)(liu)）依(yi)靠散料(liao)的(de)(de)(de)料(liao)性(xing)和(he)流(liu)(liu)動性(xing)存(cun)在(zai)。密(mi)相(xiang)輸(shu)(shu)送(song)(song)同樣也(ye)(ye)能被定義為輸(shu)(shu)送(song)(song)物料(liao)完全(quan)填滿管(guan)(guan)道(dao)(dao)截面的(de)(de)(de)一種(zhong)(zhong)輸(shu)(shu)送(song)(song)方式。稀(xi)相(xiang)輸(shu)(shu)送(song)(song)通常(chang)需要(yao)使用大量的(de)(de)(de)高速(su)氣(qi)(qi)(qi)體。氣(qi)(qi)(qi)流(liu)(liu)依(yi)靠升力和(he)推動力以離(li)散粒子(zi)的(de)(de)(de)形式攜帶著物料(liao)。參考圖(tu)1中(zhong)所(suo)述的(de)(de)(de)“懸(xuan)(xuan)浮流(liu)(liu)”，稀(xi)相(xiang)系統通常(chang)是(shi)最為被廣泛(fan)應用的(de)(de)(de)氣(qi)(qi)(qi)力輸(shu)(shu)送(song)(song)系統。由于稀(xi)相(xiang)系統設計的(de)(de)(de)相(xiang)對簡單(dan)性(xing)，它(ta)們同時(shi)(shi)(shi)也(ye)(ye)被頻繁(fan)的(de)(de)(de)應用在(zai)工業領域。輸(shu)(shu)送(song)(song)氣(qi)(qi)(qi)體的(de)(de)(de)速(su)度(du)(du)減少到比(bi)保持粒子(zi)懸(xuan)(xuan)浮狀態(tai)(tai)的(de)(de)(de)臨界值更小(xiao)(xiao)時(shi)(shi)(shi)，導(dao)致(zhi)物料(liao)在(zai)輸(shu)(shu)送(song)(song)管(guan)(guan)道(dao)(dao)的(de)(de)(de)橫(heng)截面形成不(bu)均勻的(de)(de)(de)分布。臨界氣(qi)(qi)(qi)體速(su)度(du)(du)被稱為是(shi)水平輸(shu)(shu)送(song)(song)的(de)(de)(de)跳躍速(su)度(du)(du)，垂(chui)直輸(shu)(shu)送(song)(song)時(shi)(shi)(shi)堵塞。當水平管(guan)(guan)道(dao)(dao)中(zhong)的(de)(de)(de)物料(liao)表面氣(qi)(qi)(qi)體速(su)度(du)(du)低于突變速(su)度(du)(du)時(shi)(shi)(shi)，輸(shu)(shu)送(song)(song)將(jiang)會以低流(liu)(liu)量通過管(guan)(guan)道(dao)(dao)橫(heng)截面的(de)(de)(de)上(shang)部，在(zai)管(guan)(guan)道(dao)(dao)的(de)(de)(de)剩余(yu)部分以高濃度(du)(du)低速(su)度(du)(du)的(de)(de)(de)形式填充。有時(shi)(shi)(shi)沿(yan)管(guan)(guan)道(dao)(dao)的(de)(de)(de)橫(heng)截面會被填滿，而(er)有時(shi)(shi)(shi)只(zhi)是(shi)部分被填滿.

實際應用(yong)中(zhong), 按(an)照(zhao)氣(qi)力(li)驅(qu)動形式可(ke)以分(fen)為負壓(ya)和正壓(ya)氣(qi)力(li)輸送(song)(song), 在這兩種(zhong)輸送(song)(song)系(xi)統(tong)(tong)中(zhong), 根據流動狀態(tai)圖再區分(fen)分(fen)為稀相, 密(mi)相和流化態(tai)輸送(song)(song)系(xi)統(tong)(tong). 除(chu)此之(zhi)外,根據喂料不同分(fen)為連(lian)續(xu)和批(pi)次輸送(song)(song). 在高(gao)壓(ya)密(mi)相輸送(song)(song)技術中(zhong)常采(cai)用(yong)批(pi)次的(de)壓(ya)力(li)罐(guan)進行高(gao)壓(ya)輸送(song)(song), 同時, 可(ke)以組(zu)合(he)兩個壓(ya)力(li)罐(guan)設計達到連(lian)續(xu)的(de)輸送(song)(song).

密(mi)相氣力輸送特點(dian):

● 用氣量小, 節能

● 無殘留輸送

● 不堵塞, 運行(xing)可(ke)靠

● 維護費用低

● 適合于各類粉(fen)粒(li)物料

● 壓(ya)力至0. 6m p a可調

● 適合于(yu)柔(rou)性(xing)化自動生產中(zhong)的物料(liao)高效輸送(song)