密相氣(qi)力輸送系列

氣力輸送(song)原理

氣力(li)(li)(li)輸(shu)(shu)(shu)送(song)(song)(song)系(xi)統可(ke)分類為(wei)(wei)(wei)不同(tong)(tong)的(de)(de)(de)(de)(de)(de)流(liu)(liu)動型(xing)式，其中(zhong)兩(liang)種(zhong)主要(yao)型(xing)式是(shi)：(a) 稀相(xiang)(xiang)(xiang)輸(shu)(shu)(shu)送(song)(song)(song)和（b）密(mi)相(xiang)(xiang)(xiang)輸(shu)(shu)(shu)送(song)(song)(song)每種(zhong)流(liu)(liu)動型(xing)式可(ke)按物(wu)(wu)料(liao)(liao)與空(kong)氣的(de)(de)(de)(de)(de)(de)流(liu)(liu)量(liang)比(bi)率(lv)大小(xiao)分類，其比(bi)率(lv)也(ye)被(bei)(bei)稱(cheng)為(wei)(wei)(wei)“固氣比(bi)”： μ=ms/mf (1)許(xu)多稀相(xiang)(xiang)(xiang)的(de)(de)(de)(de)(de)(de)運行范圍(wei)為(wei)(wei)(wei)0＜μ＜15，而(er)密(mi)相(xiang)(xiang)(xiang)通(tong)常是(shi)μ＞15。圖1所示(shi)的(de)(de)(de)(de)(de)(de)是(shi)典型(xing)輸(shu)(shu)(shu)送(song)(song)(song)狀態圖。稀相(xiang)(xiang)(xiang)輸(shu)(shu)(shu)送(song)(song)(song)可(ke)以被(bei)(bei)認為(wei)(wei)(wei)是(shi)一種(zhong)完全(quan)的(de)(de)(de)(de)(de)(de)懸浮(fu)流(liu)(liu)，而(er)密(mi)相(xiang)(xiang)(xiang)輸(shu)(shu)(shu)送(song)(song)(song)通(tong)常被(bei)(bei)認為(wei)(wei)(wei)是(shi)非(fei)懸浮(fu)流(liu)(liu)。然(ran)而(er)，如圖1所示(shi)，許(xu)多不同(tong)(tong)種(zhong)類的(de)(de)(de)(de)(de)(de)密(mi)相(xiang)(xiang)(xiang)（非(fei)懸浮(fu)流(liu)(liu)）依靠散(san)料(liao)(liao)的(de)(de)(de)(de)(de)(de)料(liao)(liao)性和流(liu)(liu)動性存在。密(mi)相(xiang)(xiang)(xiang)輸(shu)(shu)(shu)送(song)(song)(song)同(tong)(tong)樣也(ye)能(neng)被(bei)(bei)定義為(wei)(wei)(wei)輸(shu)(shu)(shu)送(song)(song)(song)物(wu)(wu)料(liao)(liao)完全(quan)填(tian)滿(man)(man)管(guan)(guan)道(dao)(dao)截(jie)面的(de)(de)(de)(de)(de)(de)一種(zhong)輸(shu)(shu)(shu)送(song)(song)(song)方式。稀相(xiang)(xiang)(xiang)輸(shu)(shu)(shu)送(song)(song)(song)通(tong)常需(xu)要(yao)使用大量(liang)的(de)(de)(de)(de)(de)(de)高速(su)(su)氣體。氣流(liu)(liu)依靠升(sheng)力(li)(li)(li)和推動力(li)(li)(li)以離散(san)粒子的(de)(de)(de)(de)(de)(de)形式攜(xie)帶著物(wu)(wu)料(liao)(liao)。參考圖1中(zhong)所述的(de)(de)(de)(de)(de)(de)“懸浮(fu)流(liu)(liu)”，稀相(xiang)(xiang)(xiang)系(xi)統通(tong)常是(shi)最為(wei)(wei)(wei)被(bei)(bei)廣泛應(ying)用的(de)(de)(de)(de)(de)(de)氣力(li)(li)(li)輸(shu)(shu)(shu)送(song)(song)(song)系(xi)統。由于稀相(xiang)(xiang)(xiang)系(xi)統設計的(de)(de)(de)(de)(de)(de)相(xiang)(xiang)(xiang)對簡單性，它們同(tong)(tong)時(shi)也(ye)被(bei)(bei)頻繁的(de)(de)(de)(de)(de)(de)應(ying)用在工(gong)業領(ling)域。輸(shu)(shu)(shu)送(song)(song)(song)氣體的(de)(de)(de)(de)(de)(de)速(su)(su)度(du)減少到比(bi)保持粒子懸浮(fu)狀態的(de)(de)(de)(de)(de)(de)臨(lin)界(jie)值更小(xiao)時(shi)，導致物(wu)(wu)料(liao)(liao)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)面形成不均勻的(de)(de)(de)(de)(de)(de)分布。臨(lin)界(jie)氣體速(su)(su)度(du)被(bei)(bei)稱(cheng)為(wei)(wei)(wei)是(shi)水平(ping)輸(shu)(shu)(shu)送(song)(song)(song)的(de)(de)(de)(de)(de)(de)跳躍速(su)(su)度(du)，垂直輸(shu)(shu)(shu)送(song)(song)(song)時(shi)堵塞(sai)。當水平(ping)管(guan)(guan)道(dao)(dao)中(zhong)的(de)(de)(de)(de)(de)(de)物(wu)(wu)料(liao)(liao)表面氣體速(su)(su)度(du)低于突(tu)變速(su)(su)度(du)時(shi)，輸(shu)(shu)(shu)送(song)(song)(song)將(jiang)會(hui)以低流(liu)(liu)量(liang)通(tong)過管(guan)(guan)道(dao)(dao)橫截(jie)面的(de)(de)(de)(de)(de)(de)上(shang)部，在管(guan)(guan)道(dao)(dao)的(de)(de)(de)(de)(de)(de)剩(sheng)余部分以高濃度(du)低速(su)(su)度(du)的(de)(de)(de)(de)(de)(de)形式填(tian)充。有時(shi)沿管(guan)(guan)道(dao)(dao)的(de)(de)(de)(de)(de)(de)橫截(jie)面會(hui)被(bei)(bei)填(tian)滿(man)(man)，而(er)有時(shi)只是(shi)部分被(bei)(bei)填(tian)滿(man)(man).

實際(ji)應用(yong)中(zhong), 按照氣力(li)驅動形式可以(yi)分(fen)為負壓(ya)和正壓(ya)氣力(li)輸(shu)(shu)送, 在這兩(liang)種輸(shu)(shu)送系(xi)統(tong)中(zhong), 根據流動狀態(tai)圖再區(qu)分(fen)分(fen)為稀相(xiang), 密相(xiang)和流化態(tai)輸(shu)(shu)送系(xi)統(tong). 除此(ci)之外,根據喂料(liao)不同分(fen)為連(lian)續(xu)和批次輸(shu)(shu)送. 在高(gao)壓(ya)密相(xiang)輸(shu)(shu)送技術中(zhong)常采用(yong)批次的(de)壓(ya)力(li)罐(guan)(guan)進行(xing)高(gao)壓(ya)輸(shu)(shu)送, 同時, 可以(yi)組合兩(liang)個壓(ya)力(li)罐(guan)(guan)設計達到連(lian)續(xu)的(de)輸(shu)(shu)送.

密相氣力輸送特點:

● 用氣量(liang)小(xiao), 節能

● 無殘留輸送

● 不堵(du)塞, 運行可(ke)靠

● 維護費用低

● 適合于(yu)各類粉(fen)粒物料

● 壓(ya)力至0. 6m p a可調

● 適(shi)合于柔性化自(zi)動生產中的物料高效輸送(song)