密相氣力(li)輸送系列

氣力輸送原(yuan)理(li)

氣(qi)力(li)輸(shu)送(song)(song)(song)系(xi)統可分(fen)類為(wei)(wei)(wei)(wei)(wei)不(bu)同(tong)的(de)(de)(de)(de)(de)(de)(de)流(liu)(liu)動(dong)型(xing)(xing)式(shi)，其(qi)中兩種(zhong)主要型(xing)(xing)式(shi)是(shi)：(a) 稀(xi)(xi)相(xiang)輸(shu)送(song)(song)(song)和(he)（b）密相(xiang)輸(shu)送(song)(song)(song)每種(zhong)流(liu)(liu)動(dong)型(xing)(xing)式(shi)可按(an)物(wu)料(liao)與空氣(qi)的(de)(de)(de)(de)(de)(de)(de)流(liu)(liu)量(liang)(liang)比(bi)率大小(xiao)分(fen)類，其(qi)比(bi)率也(ye)被(bei)稱為(wei)(wei)(wei)(wei)(wei)“固氣(qi)比(bi)”： μ=ms/mf (1)許多(duo)稀(xi)(xi)相(xiang)的(de)(de)(de)(de)(de)(de)(de)運行范圍為(wei)(wei)(wei)(wei)(wei)0＜μ＜15，而(er)(er)密相(xiang)通(tong)(tong)常是(shi)μ＞15。圖(tu)1所(suo)示的(de)(de)(de)(de)(de)(de)(de)是(shi)典型(xing)(xing)輸(shu)送(song)(song)(song)狀態(tai)圖(tu)。稀(xi)(xi)相(xiang)輸(shu)送(song)(song)(song)可以(yi)被(bei)認(ren)(ren)為(wei)(wei)(wei)(wei)(wei)是(shi)一種(zhong)完全(quan)(quan)的(de)(de)(de)(de)(de)(de)(de)懸(xuan)(xuan)浮流(liu)(liu)，而(er)(er)密相(xiang)輸(shu)送(song)(song)(song)通(tong)(tong)常被(bei)認(ren)(ren)為(wei)(wei)(wei)(wei)(wei)是(shi)非(fei)懸(xuan)(xuan)浮流(liu)(liu)。然而(er)(er)，如圖(tu)1所(suo)示，許多(duo)不(bu)同(tong)種(zhong)類的(de)(de)(de)(de)(de)(de)(de)密相(xiang)（非(fei)懸(xuan)(xuan)浮流(liu)(liu)）依(yi)靠(kao)散(san)(san)料(liao)的(de)(de)(de)(de)(de)(de)(de)料(liao)性和(he)流(liu)(liu)動(dong)性存在(zai)(zai)(zai)。密相(xiang)輸(shu)送(song)(song)(song)同(tong)樣也(ye)能被(bei)定義為(wei)(wei)(wei)(wei)(wei)輸(shu)送(song)(song)(song)物(wu)料(liao)完全(quan)(quan)填滿(man)(man)管(guan)(guan)道(dao)截(jie)面(mian)的(de)(de)(de)(de)(de)(de)(de)一種(zhong)輸(shu)送(song)(song)(song)方式(shi)。稀(xi)(xi)相(xiang)輸(shu)送(song)(song)(song)通(tong)(tong)常需要使用大量(liang)(liang)的(de)(de)(de)(de)(de)(de)(de)高速(su)(su)氣(qi)體(ti)(ti)(ti)。氣(qi)流(liu)(liu)依(yi)靠(kao)升力(li)和(he)推動(dong)力(li)以(yi)離散(san)(san)粒子(zi)的(de)(de)(de)(de)(de)(de)(de)形(xing)(xing)式(shi)攜帶著物(wu)料(liao)。參(can)考圖(tu)1中所(suo)述(shu)的(de)(de)(de)(de)(de)(de)(de)“懸(xuan)(xuan)浮流(liu)(liu)”，稀(xi)(xi)相(xiang)系(xi)統通(tong)(tong)常是(shi)最(zui)為(wei)(wei)(wei)(wei)(wei)被(bei)廣泛應用的(de)(de)(de)(de)(de)(de)(de)氣(qi)力(li)輸(shu)送(song)(song)(song)系(xi)統。由于(yu)稀(xi)(xi)相(xiang)系(xi)統設計的(de)(de)(de)(de)(de)(de)(de)相(xiang)對簡(jian)單性，它們同(tong)時(shi)也(ye)被(bei)頻繁(fan)的(de)(de)(de)(de)(de)(de)(de)應用在(zai)(zai)(zai)工業領域(yu)。輸(shu)送(song)(song)(song)氣(qi)體(ti)(ti)(ti)的(de)(de)(de)(de)(de)(de)(de)速(su)(su)度(du)(du)減少到(dao)比(bi)保(bao)持粒子(zi)懸(xuan)(xuan)浮狀態(tai)的(de)(de)(de)(de)(de)(de)(de)臨界值更小(xiao)時(shi)，導致物(wu)料(liao)在(zai)(zai)(zai)輸(shu)送(song)(song)(song)管(guan)(guan)道(dao)的(de)(de)(de)(de)(de)(de)(de)橫(heng)截(jie)面(mian)形(xing)(xing)成不(bu)均勻(yun)的(de)(de)(de)(de)(de)(de)(de)分(fen)布。臨界氣(qi)體(ti)(ti)(ti)速(su)(su)度(du)(du)被(bei)稱為(wei)(wei)(wei)(wei)(wei)是(shi)水平(ping)輸(shu)送(song)(song)(song)的(de)(de)(de)(de)(de)(de)(de)跳躍速(su)(su)度(du)(du)，垂直輸(shu)送(song)(song)(song)時(shi)堵塞。當水平(ping)管(guan)(guan)道(dao)中的(de)(de)(de)(de)(de)(de)(de)物(wu)料(liao)表面(mian)氣(qi)體(ti)(ti)(ti)速(su)(su)度(du)(du)低(di)于(yu)突變速(su)(su)度(du)(du)時(shi)，輸(shu)送(song)(song)(song)將會(hui)以(yi)低(di)流(liu)(liu)量(liang)(liang)通(tong)(tong)過管(guan)(guan)道(dao)橫(heng)截(jie)面(mian)的(de)(de)(de)(de)(de)(de)(de)上部，在(zai)(zai)(zai)管(guan)(guan)道(dao)的(de)(de)(de)(de)(de)(de)(de)剩(sheng)余(yu)部分(fen)以(yi)高濃度(du)(du)低(di)速(su)(su)度(du)(du)的(de)(de)(de)(de)(de)(de)(de)形(xing)(xing)式(shi)填充。有(you)時(shi)沿管(guan)(guan)道(dao)的(de)(de)(de)(de)(de)(de)(de)橫(heng)截(jie)面(mian)會(hui)被(bei)填滿(man)(man)，而(er)(er)有(you)時(shi)只(zhi)是(shi)部分(fen)被(bei)填滿(man)(man).

實(shi)際應用(yong)中, 按照氣力驅動形式可以(yi)分為(wei)(wei)負(fu)壓(ya)和正壓(ya)氣力輸(shu)送(song), 在(zai)(zai)這兩種輸(shu)送(song)系統中, 根據流動狀態(tai)圖再區分分為(wei)(wei)稀相(xiang), 密相(xiang)和流化態(tai)輸(shu)送(song)系統. 除(chu)此之外,根據喂(wei)料不同分為(wei)(wei)連續和批(pi)次(ci)輸(shu)送(song). 在(zai)(zai)高(gao)壓(ya)密相(xiang)輸(shu)送(song)技術中常采用(yong)批(pi)次(ci)的壓(ya)力罐進行高(gao)壓(ya)輸(shu)送(song), 同時, 可以(yi)組合兩個壓(ya)力罐設計達到連續的輸(shu)送(song).

密相氣(qi)力(li)輸(shu)送特(te)點:

● 用氣量小(xiao), 節(jie)能

● 無殘留(liu)輸送(song)

● 不堵塞, 運(yun)行(xing)可(ke)靠

● 維護費用低(di)

● 適合于各類粉粒物料(liao)

● 壓力至0. 6m p a可(ke)調(diao)

● 適合于柔(rou)性化(hua)自(zi)動生(sheng)產中的物料高效輸送(song)