密(mi)相氣力輸送系列(lie)

氣力(li)輸(shu)送原理(li)

氣(qi)(qi)力輸(shu)(shu)(shu)(shu)送(song)(song)(song)系統(tong)(tong)(tong)可分(fen)(fen)(fen)類(lei)為(wei)(wei)(wei)不(bu)同(tong)(tong)的(de)(de)(de)(de)(de)流(liu)動(dong)(dong)型式(shi)，其中兩種主要(yao)(yao)型式(shi)是(shi)(shi)(shi)：(a) 稀(xi)(xi)相(xiang)(xiang)(xiang)輸(shu)(shu)(shu)(shu)送(song)(song)(song)和(he)（b）密(mi)相(xiang)(xiang)(xiang)輸(shu)(shu)(shu)(shu)送(song)(song)(song)每種流(liu)動(dong)(dong)型式(shi)可按(an)物料(liao)與空氣(qi)(qi)的(de)(de)(de)(de)(de)流(liu)量(liang)比(bi)率(lv)大小(xiao)分(fen)(fen)(fen)類(lei)，其比(bi)率(lv)也被(bei)(bei)稱(cheng)(cheng)為(wei)(wei)(wei)“固氣(qi)(qi)比(bi)”： μ=ms/mf (1)許多稀(xi)(xi)相(xiang)(xiang)(xiang)的(de)(de)(de)(de)(de)運行范圍為(wei)(wei)(wei)0＜μ＜15，而(er)密(mi)相(xiang)(xiang)(xiang)通(tong)常(chang)(chang)是(shi)(shi)(shi)μ＞15。圖(tu)1所(suo)示的(de)(de)(de)(de)(de)是(shi)(shi)(shi)典型輸(shu)(shu)(shu)(shu)送(song)(song)(song)狀(zhuang)態圖(tu)。稀(xi)(xi)相(xiang)(xiang)(xiang)輸(shu)(shu)(shu)(shu)送(song)(song)(song)可以被(bei)(bei)認(ren)為(wei)(wei)(wei)是(shi)(shi)(shi)一種完全(quan)的(de)(de)(de)(de)(de)懸(xuan)浮(fu)流(liu)，而(er)密(mi)相(xiang)(xiang)(xiang)輸(shu)(shu)(shu)(shu)送(song)(song)(song)通(tong)常(chang)(chang)被(bei)(bei)認(ren)為(wei)(wei)(wei)是(shi)(shi)(shi)非(fei)懸(xuan)浮(fu)流(liu)。然而(er)，如圖(tu)1所(suo)示，許多不(bu)同(tong)(tong)種類(lei)的(de)(de)(de)(de)(de)密(mi)相(xiang)(xiang)(xiang)（非(fei)懸(xuan)浮(fu)流(liu)）依(yi)(yi)靠散料(liao)的(de)(de)(de)(de)(de)料(liao)性和(he)流(liu)動(dong)(dong)性存(cun)在。密(mi)相(xiang)(xiang)(xiang)輸(shu)(shu)(shu)(shu)送(song)(song)(song)同(tong)(tong)樣也能(neng)被(bei)(bei)定義為(wei)(wei)(wei)輸(shu)(shu)(shu)(shu)送(song)(song)(song)物料(liao)完全(quan)填(tian)滿管道(dao)截(jie)面(mian)的(de)(de)(de)(de)(de)一種輸(shu)(shu)(shu)(shu)送(song)(song)(song)方(fang)式(shi)。稀(xi)(xi)相(xiang)(xiang)(xiang)輸(shu)(shu)(shu)(shu)送(song)(song)(song)通(tong)常(chang)(chang)需要(yao)(yao)使(shi)用(yong)大量(liang)的(de)(de)(de)(de)(de)高(gao)(gao)速(su)氣(qi)(qi)體(ti)。氣(qi)(qi)流(liu)依(yi)(yi)靠升力和(he)推動(dong)(dong)力以離散粒子的(de)(de)(de)(de)(de)形(xing)式(shi)攜帶著物料(liao)。參(can)考圖(tu)1中所(suo)述的(de)(de)(de)(de)(de)“懸(xuan)浮(fu)流(liu)”，稀(xi)(xi)相(xiang)(xiang)(xiang)系統(tong)(tong)(tong)通(tong)常(chang)(chang)是(shi)(shi)(shi)最為(wei)(wei)(wei)被(bei)(bei)廣泛應用(yong)的(de)(de)(de)(de)(de)氣(qi)(qi)力輸(shu)(shu)(shu)(shu)送(song)(song)(song)系統(tong)(tong)(tong)。由(you)于稀(xi)(xi)相(xiang)(xiang)(xiang)系統(tong)(tong)(tong)設計的(de)(de)(de)(de)(de)相(xiang)(xiang)(xiang)對簡(jian)單性，它們(men)同(tong)(tong)時(shi)(shi)(shi)也被(bei)(bei)頻繁的(de)(de)(de)(de)(de)應用(yong)在工(gong)業領域。輸(shu)(shu)(shu)(shu)送(song)(song)(song)氣(qi)(qi)體(ti)的(de)(de)(de)(de)(de)速(su)度(du)(du)減少到比(bi)保(bao)持粒子懸(xuan)浮(fu)狀(zhuang)態的(de)(de)(de)(de)(de)臨界值更小(xiao)時(shi)(shi)(shi)，導致物料(liao)在輸(shu)(shu)(shu)(shu)送(song)(song)(song)管道(dao)的(de)(de)(de)(de)(de)橫截(jie)面(mian)形(xing)成(cheng)不(bu)均勻的(de)(de)(de)(de)(de)分(fen)(fen)(fen)布。臨界氣(qi)(qi)體(ti)速(su)度(du)(du)被(bei)(bei)稱(cheng)(cheng)為(wei)(wei)(wei)是(shi)(shi)(shi)水平輸(shu)(shu)(shu)(shu)送(song)(song)(song)的(de)(de)(de)(de)(de)跳(tiao)躍(yue)速(su)度(du)(du)，垂(chui)直輸(shu)(shu)(shu)(shu)送(song)(song)(song)時(shi)(shi)(shi)堵塞。當水平管道(dao)中的(de)(de)(de)(de)(de)物料(liao)表面(mian)氣(qi)(qi)體(ti)速(su)度(du)(du)低于突變速(su)度(du)(du)時(shi)(shi)(shi)，輸(shu)(shu)(shu)(shu)送(song)(song)(song)將會以低流(liu)量(liang)通(tong)過管道(dao)橫截(jie)面(mian)的(de)(de)(de)(de)(de)上部，在管道(dao)的(de)(de)(de)(de)(de)剩余部分(fen)(fen)(fen)以高(gao)(gao)濃度(du)(du)低速(su)度(du)(du)的(de)(de)(de)(de)(de)形(xing)式(shi)填(tian)充。有(you)時(shi)(shi)(shi)沿管道(dao)的(de)(de)(de)(de)(de)橫截(jie)面(mian)會被(bei)(bei)填(tian)滿，而(er)有(you)時(shi)(shi)(shi)只是(shi)(shi)(shi)部分(fen)(fen)(fen)被(bei)(bei)填(tian)滿.

實際應用(yong)中, 按(an)照氣力(li)(li)驅動形式可(ke)以分為(wei)負壓(ya)和正(zheng)壓(ya)氣力(li)(li)輸(shu)送(song)(song), 在這兩(liang)種(zhong)輸(shu)送(song)(song)系統(tong)中, 根(gen)據流動狀態圖再區分分為(wei)稀相(xiang), 密相(xiang)和流化態輸(shu)送(song)(song)系統(tong). 除此之外,根(gen)據喂料不(bu)同(tong)分為(wei)連續和批次(ci)輸(shu)送(song)(song). 在高壓(ya)密相(xiang)輸(shu)送(song)(song)技術中常采用(yong)批次(ci)的(de)壓(ya)力(li)(li)罐進行高壓(ya)輸(shu)送(song)(song), 同(tong)時, 可(ke)以組合兩(liang)個(ge)壓(ya)力(li)(li)罐設(she)計達到(dao)連續的(de)輸(shu)送(song)(song).

密相氣力輸(shu)送特點:

● 用氣量(liang)小, 節能

● 無殘留輸送

● 不堵塞, 運(yun)行(xing)可靠

● 維護費用低

● 適合于(yu)各類粉粒物(wu)料(liao)

● 壓力至0. 6m p a可(ke)調

● 適合于柔(rou)性化自動(dong)生產中的物料(liao)高效(xiao)輸送