密相氣力輸送系列

氣力輸(shu)送原理

氣(qi)(qi)力(li)輸(shu)送(song)(song)(song)系(xi)統(tong)(tong)可(ke)分類(lei)(lei)為(wei)(wei)不同的(de)(de)(de)(de)(de)(de)流(liu)(liu)動型式(shi)，其中兩種(zhong)(zhong)(zhong)主要型式(shi)是(shi)(shi)(shi)：(a) 稀(xi)相(xiang)(xiang)輸(shu)送(song)(song)(song)和（b）密相(xiang)(xiang)輸(shu)送(song)(song)(song)每種(zhong)(zhong)(zhong)流(liu)(liu)動型式(shi)可(ke)按物料(liao)(liao)與空氣(qi)(qi)的(de)(de)(de)(de)(de)(de)流(liu)(liu)量(liang)(liang)比(bi)率(lv)大小(xiao)分類(lei)(lei)，其比(bi)率(lv)也(ye)被(bei)稱(cheng)為(wei)(wei)“固氣(qi)(qi)比(bi)”： μ=ms/mf (1)許多(duo)(duo)稀(xi)相(xiang)(xiang)的(de)(de)(de)(de)(de)(de)運行范圍為(wei)(wei)0＜μ＜15，而(er)密相(xiang)(xiang)通(tong)(tong)(tong)常(chang)是(shi)(shi)(shi)μ＞15。圖(tu)(tu)1所示的(de)(de)(de)(de)(de)(de)是(shi)(shi)(shi)典型輸(shu)送(song)(song)(song)狀(zhuang)態圖(tu)(tu)。稀(xi)相(xiang)(xiang)輸(shu)送(song)(song)(song)可(ke)以被(bei)認(ren)為(wei)(wei)是(shi)(shi)(shi)一種(zhong)(zhong)(zhong)完全(quan)的(de)(de)(de)(de)(de)(de)懸(xuan)浮(fu)流(liu)(liu)，而(er)密相(xiang)(xiang)輸(shu)送(song)(song)(song)通(tong)(tong)(tong)常(chang)被(bei)認(ren)為(wei)(wei)是(shi)(shi)(shi)非懸(xuan)浮(fu)流(liu)(liu)。然而(er)，如圖(tu)(tu)1所示，許多(duo)(duo)不同種(zhong)(zhong)(zhong)類(lei)(lei)的(de)(de)(de)(de)(de)(de)密相(xiang)(xiang)（非懸(xuan)浮(fu)流(liu)(liu)）依(yi)靠散料(liao)(liao)的(de)(de)(de)(de)(de)(de)料(liao)(liao)性(xing)和流(liu)(liu)動性(xing)存在。密相(xiang)(xiang)輸(shu)送(song)(song)(song)同樣也(ye)能(neng)被(bei)定義(yi)為(wei)(wei)輸(shu)送(song)(song)(song)物料(liao)(liao)完全(quan)填滿管(guan)(guan)(guan)道(dao)(dao)(dao)截面的(de)(de)(de)(de)(de)(de)一種(zhong)(zhong)(zhong)輸(shu)送(song)(song)(song)方式(shi)。稀(xi)相(xiang)(xiang)輸(shu)送(song)(song)(song)通(tong)(tong)(tong)常(chang)需要使用大量(liang)(liang)的(de)(de)(de)(de)(de)(de)高速(su)氣(qi)(qi)體(ti)。氣(qi)(qi)流(liu)(liu)依(yi)靠升力(li)和推動力(li)以離散粒(li)子的(de)(de)(de)(de)(de)(de)形式(shi)攜帶(dai)著物料(liao)(liao)。參考(kao)圖(tu)(tu)1中所述的(de)(de)(de)(de)(de)(de)“懸(xuan)浮(fu)流(liu)(liu)”，稀(xi)相(xiang)(xiang)系(xi)統(tong)(tong)通(tong)(tong)(tong)常(chang)是(shi)(shi)(shi)最為(wei)(wei)被(bei)廣泛(fan)應用的(de)(de)(de)(de)(de)(de)氣(qi)(qi)力(li)輸(shu)送(song)(song)(song)系(xi)統(tong)(tong)。由于稀(xi)相(xiang)(xiang)系(xi)統(tong)(tong)設計的(de)(de)(de)(de)(de)(de)相(xiang)(xiang)對簡單性(xing)，它(ta)們同時(shi)也(ye)被(bei)頻繁的(de)(de)(de)(de)(de)(de)應用在工業領域。輸(shu)送(song)(song)(song)氣(qi)(qi)體(ti)的(de)(de)(de)(de)(de)(de)速(su)度(du)減少到(dao)比(bi)保持粒(li)子懸(xuan)浮(fu)狀(zhuang)態的(de)(de)(de)(de)(de)(de)臨界值更小(xiao)時(shi)，導致物料(liao)(liao)在輸(shu)送(song)(song)(song)管(guan)(guan)(guan)道(dao)(dao)(dao)的(de)(de)(de)(de)(de)(de)橫(heng)截面形成不均(jun)勻的(de)(de)(de)(de)(de)(de)分布。臨界氣(qi)(qi)體(ti)速(su)度(du)被(bei)稱(cheng)為(wei)(wei)是(shi)(shi)(shi)水(shui)平輸(shu)送(song)(song)(song)的(de)(de)(de)(de)(de)(de)跳躍速(su)度(du)，垂直輸(shu)送(song)(song)(song)時(shi)堵塞。當水(shui)平管(guan)(guan)(guan)道(dao)(dao)(dao)中的(de)(de)(de)(de)(de)(de)物料(liao)(liao)表面氣(qi)(qi)體(ti)速(su)度(du)低于突變速(su)度(du)時(shi)，輸(shu)送(song)(song)(song)將會以低流(liu)(liu)量(liang)(liang)通(tong)(tong)(tong)過管(guan)(guan)(guan)道(dao)(dao)(dao)橫(heng)截面的(de)(de)(de)(de)(de)(de)上部，在管(guan)(guan)(guan)道(dao)(dao)(dao)的(de)(de)(de)(de)(de)(de)剩余部分以高濃度(du)低速(su)度(du)的(de)(de)(de)(de)(de)(de)形式(shi)填充。有時(shi)沿管(guan)(guan)(guan)道(dao)(dao)(dao)的(de)(de)(de)(de)(de)(de)橫(heng)截面會被(bei)填滿，而(er)有時(shi)只是(shi)(shi)(shi)部分被(bei)填滿.

實際應用(yong)中, 按(an)照氣(qi)力(li)驅(qu)動(dong)(dong)形式可以分(fen)為負壓(ya)和正壓(ya)氣(qi)力(li)輸送(song), 在這兩種輸送(song)系(xi)統中, 根(gen)據流(liu)動(dong)(dong)狀態圖再區分(fen)分(fen)為稀(xi)相(xiang), 密相(xiang)和流(liu)化態輸送(song)系(xi)統. 除(chu)此之(zhi)外,根(gen)據喂(wei)料不(bu)同分(fen)為連續和批次輸送(song). 在高壓(ya)密相(xiang)輸送(song)技術中常采用(yong)批次的(de)壓(ya)力(li)罐進(jin)行高壓(ya)輸送(song), 同時, 可以組合(he)兩個壓(ya)力(li)罐設計達(da)到連續的(de)輸送(song).

密相(xiang)氣力輸(shu)送特點:

● 用(yong)氣量小(xiao), 節能

● 無(wu)殘留輸送

● 不堵塞, 運行可靠(kao)

● 維護費(fei)用低

● 適合于(yu)各類粉(fen)粒(li)物料(liao)

● 壓力(li)至0. 6m p a可調

● 適合于柔性化(hua)自動生產中的物料高效輸(shu)送