密相氣力輸送系列

氣力輸送原(yuan)理

氣(qi)力(li)輸(shu)(shu)(shu)(shu)送(song)(song)系(xi)(xi)統(tong)(tong)可分(fen)(fen)類(lei)為(wei)不同的(de)(de)(de)(de)(de)流(liu)(liu)(liu)動型(xing)式(shi)，其(qi)中兩種(zhong)主要型(xing)式(shi)是(shi)：(a) 稀(xi)相(xiang)輸(shu)(shu)(shu)(shu)送(song)(song)和(he)（b）密(mi)(mi)相(xiang)輸(shu)(shu)(shu)(shu)送(song)(song)每種(zhong)流(liu)(liu)(liu)動型(xing)式(shi)可按物(wu)料(liao)與空(kong)氣(qi)的(de)(de)(de)(de)(de)流(liu)(liu)(liu)量(liang)比(bi)率大(da)小分(fen)(fen)類(lei)，其(qi)比(bi)率也(ye)被(bei)(bei)(bei)(bei)稱為(wei)“固氣(qi)比(bi)”： μ=ms/mf (1)許(xu)多稀(xi)相(xiang)的(de)(de)(de)(de)(de)運行范(fan)圍為(wei)0＜μ＜15，而(er)密(mi)(mi)相(xiang)通(tong)常(chang)是(shi)μ＞15。圖1所示(shi)的(de)(de)(de)(de)(de)是(shi)典(dian)型(xing)輸(shu)(shu)(shu)(shu)送(song)(song)狀態圖。稀(xi)相(xiang)輸(shu)(shu)(shu)(shu)送(song)(song)可以被(bei)(bei)(bei)(bei)認為(wei)是(shi)一(yi)種(zhong)完全的(de)(de)(de)(de)(de)懸(xuan)浮流(liu)(liu)(liu)，而(er)密(mi)(mi)相(xiang)輸(shu)(shu)(shu)(shu)送(song)(song)通(tong)常(chang)被(bei)(bei)(bei)(bei)認為(wei)是(shi)非(fei)懸(xuan)浮流(liu)(liu)(liu)。然(ran)而(er)，如圖1所示(shi)，許(xu)多不同種(zhong)類(lei)的(de)(de)(de)(de)(de)密(mi)(mi)相(xiang)（非(fei)懸(xuan)浮流(liu)(liu)(liu)）依靠(kao)散(san)料(liao)的(de)(de)(de)(de)(de)料(liao)性(xing)(xing)(xing)和(he)流(liu)(liu)(liu)動性(xing)(xing)(xing)存在(zai)。密(mi)(mi)相(xiang)輸(shu)(shu)(shu)(shu)送(song)(song)同樣也(ye)能(neng)被(bei)(bei)(bei)(bei)定義(yi)為(wei)輸(shu)(shu)(shu)(shu)送(song)(song)物(wu)料(liao)完全填(tian)滿管道截(jie)(jie)面(mian)的(de)(de)(de)(de)(de)一(yi)種(zhong)輸(shu)(shu)(shu)(shu)送(song)(song)方式(shi)。稀(xi)相(xiang)輸(shu)(shu)(shu)(shu)送(song)(song)通(tong)常(chang)需(xu)要使用大(da)量(liang)的(de)(de)(de)(de)(de)高(gao)速(su)氣(qi)體(ti)(ti)。氣(qi)流(liu)(liu)(liu)依靠(kao)升力(li)和(he)推動力(li)以離散(san)粒(li)子的(de)(de)(de)(de)(de)形式(shi)攜帶著物(wu)料(liao)。參考圖1中所述(shu)的(de)(de)(de)(de)(de)“懸(xuan)浮流(liu)(liu)(liu)”，稀(xi)相(xiang)系(xi)(xi)統(tong)(tong)通(tong)常(chang)是(shi)最為(wei)被(bei)(bei)(bei)(bei)廣泛應(ying)用的(de)(de)(de)(de)(de)氣(qi)力(li)輸(shu)(shu)(shu)(shu)送(song)(song)系(xi)(xi)統(tong)(tong)。由(you)于稀(xi)相(xiang)系(xi)(xi)統(tong)(tong)設計的(de)(de)(de)(de)(de)相(xiang)對簡單性(xing)(xing)(xing)，它們同時(shi)(shi)(shi)也(ye)被(bei)(bei)(bei)(bei)頻繁(fan)的(de)(de)(de)(de)(de)應(ying)用在(zai)工業領域。輸(shu)(shu)(shu)(shu)送(song)(song)氣(qi)體(ti)(ti)的(de)(de)(de)(de)(de)速(su)度(du)(du)減少到比(bi)保(bao)持(chi)粒(li)子懸(xuan)浮狀態的(de)(de)(de)(de)(de)臨(lin)界(jie)值更小時(shi)(shi)(shi)，導致物(wu)料(liao)在(zai)輸(shu)(shu)(shu)(shu)送(song)(song)管道的(de)(de)(de)(de)(de)橫截(jie)(jie)面(mian)形成不均勻的(de)(de)(de)(de)(de)分(fen)(fen)布(bu)。臨(lin)界(jie)氣(qi)體(ti)(ti)速(su)度(du)(du)被(bei)(bei)(bei)(bei)稱為(wei)是(shi)水平輸(shu)(shu)(shu)(shu)送(song)(song)的(de)(de)(de)(de)(de)跳躍速(su)度(du)(du)，垂直(zhi)輸(shu)(shu)(shu)(shu)送(song)(song)時(shi)(shi)(shi)堵塞。當水平管道中的(de)(de)(de)(de)(de)物(wu)料(liao)表面(mian)氣(qi)體(ti)(ti)速(su)度(du)(du)低(di)(di)于突(tu)變(bian)速(su)度(du)(du)時(shi)(shi)(shi)，輸(shu)(shu)(shu)(shu)送(song)(song)將會以低(di)(di)流(liu)(liu)(liu)量(liang)通(tong)過(guo)管道橫截(jie)(jie)面(mian)的(de)(de)(de)(de)(de)上部(bu)，在(zai)管道的(de)(de)(de)(de)(de)剩余部(bu)分(fen)(fen)以高(gao)濃度(du)(du)低(di)(di)速(su)度(du)(du)的(de)(de)(de)(de)(de)形式(shi)填(tian)充。有時(shi)(shi)(shi)沿(yan)管道的(de)(de)(de)(de)(de)橫截(jie)(jie)面(mian)會被(bei)(bei)(bei)(bei)填(tian)滿，而(er)有時(shi)(shi)(shi)只是(shi)部(bu)分(fen)(fen)被(bei)(bei)(bei)(bei)填(tian)滿.

實際(ji)應用(yong)(yong)中(zhong)(zhong), 按照(zhao)氣力(li)驅動(dong)形(xing)式(shi)可(ke)以(yi)分為(wei)(wei)(wei)負壓(ya)(ya)和(he)正壓(ya)(ya)氣力(li)輸(shu)(shu)送, 在(zai)這兩種(zhong)輸(shu)(shu)送系統(tong)中(zhong)(zhong), 根據流動(dong)狀態(tai)圖再(zai)區分分為(wei)(wei)(wei)稀(xi)相(xiang), 密相(xiang)和(he)流化態(tai)輸(shu)(shu)送系統(tong). 除此之外,根據喂料不(bu)同(tong)分為(wei)(wei)(wei)連續和(he)批次輸(shu)(shu)送. 在(zai)高(gao)壓(ya)(ya)密相(xiang)輸(shu)(shu)送技術中(zhong)(zhong)常采用(yong)(yong)批次的(de)壓(ya)(ya)力(li)罐進行高(gao)壓(ya)(ya)輸(shu)(shu)送, 同(tong)時, 可(ke)以(yi)組合兩個壓(ya)(ya)力(li)罐設計達到連續的(de)輸(shu)(shu)送.

密相氣力輸送特點:

● 用氣量小, 節能

● 無殘留輸送

● 不(bu)堵塞, 運行可靠

● 維護費用低

● 適合于各類(lei)粉粒物料

● 壓力至0. 6m p a可調

● 適合于柔性化自動生產中的(de)物(wu)料高效輸(shu)送