密相(xiang)氣力輸送系列

氣(qi)力輸送原(yuan)理

氣力輸(shu)(shu)送(song)(song)(song)(song)系(xi)(xi)統(tong)可分(fen)類為(wei)不同的(de)(de)(de)(de)流動(dong)型(xing)式(shi)，其中兩種(zhong)(zhong)主要(yao)(yao)型(xing)式(shi)是(shi)：(a) 稀(xi)(xi)相(xiang)(xiang)(xiang)輸(shu)(shu)送(song)(song)(song)(song)和(he)（b）密(mi)(mi)相(xiang)(xiang)(xiang)輸(shu)(shu)送(song)(song)(song)(song)每種(zhong)(zhong)流動(dong)型(xing)式(shi)可按物料(liao)與(yu)空氣的(de)(de)(de)(de)流量(liang)比(bi)(bi)率大(da)(da)小(xiao)分(fen)類，其比(bi)(bi)率也被(bei)(bei)稱為(wei)“固氣比(bi)(bi)”： μ=ms/mf (1)許(xu)(xu)多稀(xi)(xi)相(xiang)(xiang)(xiang)的(de)(de)(de)(de)運行范(fan)圍(wei)為(wei)0＜μ＜15，而(er)(er)密(mi)(mi)相(xiang)(xiang)(xiang)通常(chang)是(shi)μ＞15。圖1所示的(de)(de)(de)(de)是(shi)典型(xing)輸(shu)(shu)送(song)(song)(song)(song)狀(zhuang)態圖。稀(xi)(xi)相(xiang)(xiang)(xiang)輸(shu)(shu)送(song)(song)(song)(song)可以(yi)被(bei)(bei)認為(wei)是(shi)一(yi)種(zhong)(zhong)完全(quan)的(de)(de)(de)(de)懸(xuan)(xuan)浮流，而(er)(er)密(mi)(mi)相(xiang)(xiang)(xiang)輸(shu)(shu)送(song)(song)(song)(song)通常(chang)被(bei)(bei)認為(wei)是(shi)非懸(xuan)(xuan)浮流。然而(er)(er)，如圖1所示，許(xu)(xu)多不同種(zhong)(zhong)類的(de)(de)(de)(de)密(mi)(mi)相(xiang)(xiang)(xiang)（非懸(xuan)(xuan)浮流）依靠(kao)散(san)料(liao)的(de)(de)(de)(de)料(liao)性和(he)流動(dong)性存在(zai)。密(mi)(mi)相(xiang)(xiang)(xiang)輸(shu)(shu)送(song)(song)(song)(song)同樣也能(neng)被(bei)(bei)定義為(wei)輸(shu)(shu)送(song)(song)(song)(song)物料(liao)完全(quan)填(tian)(tian)滿管(guan)道(dao)截面(mian)(mian)的(de)(de)(de)(de)一(yi)種(zhong)(zhong)輸(shu)(shu)送(song)(song)(song)(song)方式(shi)。稀(xi)(xi)相(xiang)(xiang)(xiang)輸(shu)(shu)送(song)(song)(song)(song)通常(chang)需要(yao)(yao)使用大(da)(da)量(liang)的(de)(de)(de)(de)高速氣體。氣流依靠(kao)升力和(he)推(tui)動(dong)力以(yi)離(li)散(san)粒子的(de)(de)(de)(de)形(xing)式(shi)攜(xie)帶著物料(liao)。參考圖1中所述的(de)(de)(de)(de)“懸(xuan)(xuan)浮流”，稀(xi)(xi)相(xiang)(xiang)(xiang)系(xi)(xi)統(tong)通常(chang)是(shi)最為(wei)被(bei)(bei)廣泛應用的(de)(de)(de)(de)氣力輸(shu)(shu)送(song)(song)(song)(song)系(xi)(xi)統(tong)。由(you)于稀(xi)(xi)相(xiang)(xiang)(xiang)系(xi)(xi)統(tong)設(she)計的(de)(de)(de)(de)相(xiang)(xiang)(xiang)對簡(jian)單性，它們同時(shi)(shi)也被(bei)(bei)頻繁的(de)(de)(de)(de)應用在(zai)工業領域。輸(shu)(shu)送(song)(song)(song)(song)氣體的(de)(de)(de)(de)速度(du)(du)減少到比(bi)(bi)保持粒子懸(xuan)(xuan)浮狀(zhuang)態的(de)(de)(de)(de)臨(lin)界(jie)值更小(xiao)時(shi)(shi)，導致物料(liao)在(zai)輸(shu)(shu)送(song)(song)(song)(song)管(guan)道(dao)的(de)(de)(de)(de)橫截面(mian)(mian)形(xing)成不均勻的(de)(de)(de)(de)分(fen)布。臨(lin)界(jie)氣體速度(du)(du)被(bei)(bei)稱為(wei)是(shi)水(shui)平輸(shu)(shu)送(song)(song)(song)(song)的(de)(de)(de)(de)跳躍速度(du)(du)，垂直輸(shu)(shu)送(song)(song)(song)(song)時(shi)(shi)堵塞。當水(shui)平管(guan)道(dao)中的(de)(de)(de)(de)物料(liao)表面(mian)(mian)氣體速度(du)(du)低(di)于突變速度(du)(du)時(shi)(shi)，輸(shu)(shu)送(song)(song)(song)(song)將會(hui)以(yi)低(di)流量(liang)通過管(guan)道(dao)橫截面(mian)(mian)的(de)(de)(de)(de)上部，在(zai)管(guan)道(dao)的(de)(de)(de)(de)剩余部分(fen)以(yi)高濃度(du)(du)低(di)速度(du)(du)的(de)(de)(de)(de)形(xing)式(shi)填(tian)(tian)充。有(you)時(shi)(shi)沿管(guan)道(dao)的(de)(de)(de)(de)橫截面(mian)(mian)會(hui)被(bei)(bei)填(tian)(tian)滿，而(er)(er)有(you)時(shi)(shi)只是(shi)部分(fen)被(bei)(bei)填(tian)(tian)滿.

實際應用中(zhong)(zhong), 按照氣力驅動(dong)形式可以(yi)分為負壓(ya)和正壓(ya)氣力輸(shu)送(song)(song), 在這兩種(zhong)輸(shu)送(song)(song)系統中(zhong)(zhong), 根(gen)據(ju)流動(dong)狀態圖再區分分為稀相(xiang)(xiang), 密相(xiang)(xiang)和流化態輸(shu)送(song)(song)系統. 除此之(zhi)外(wai),根(gen)據(ju)喂(wei)料不同分為連(lian)(lian)續和批次(ci)輸(shu)送(song)(song). 在高壓(ya)密相(xiang)(xiang)輸(shu)送(song)(song)技(ji)術中(zhong)(zhong)常(chang)采(cai)用批次(ci)的壓(ya)力罐進行高壓(ya)輸(shu)送(song)(song), 同時, 可以(yi)組合兩個(ge)壓(ya)力罐設計達到(dao)連(lian)(lian)續的輸(shu)送(song)(song).

密相氣力輸送特點(dian):

● 用氣量小(xiao), 節(jie)能

● 無殘(can)留輸送

● 不(bu)堵塞, 運行可(ke)靠

● 維護費(fei)用(yong)低

● 適合于各類粉(fen)粒物料

● 壓力至0. 6m p a可調(diao)

● 適合于柔性化自動生產中的物料(liao)高效輸送(song)