密相氣力輸送(song)系列

氣力輸送原理(li)

氣(qi)力輸(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)系(xi)統可(ke)(ke)分(fen)類(lei)為(wei)(wei)(wei)(wei)(wei)(wei)不同的(de)(de)(de)(de)流(liu)(liu)動型式，其(qi)中兩種主要(yao)型式是(shi)(shi)：(a) 稀相(xiang)(xiang)(xiang)(xiang)輸(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)和（b）密(mi)相(xiang)(xiang)(xiang)(xiang)輸(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)每種流(liu)(liu)動型式可(ke)(ke)按物料(liao)與空氣(qi)的(de)(de)(de)(de)流(liu)(liu)量比(bi)率大小(xiao)分(fen)類(lei)，其(qi)比(bi)率也(ye)被(bei)(bei)(bei)稱為(wei)(wei)(wei)(wei)(wei)(wei)“固氣(qi)比(bi)”： μ=ms/mf (1)許多稀相(xiang)(xiang)(xiang)(xiang)的(de)(de)(de)(de)運行范圍為(wei)(wei)(wei)(wei)(wei)(wei)0＜μ＜15，而密(mi)相(xiang)(xiang)(xiang)(xiang)通常(chang)是(shi)(shi)μ＞15。圖1所(suo)示的(de)(de)(de)(de)是(shi)(shi)典(dian)型輸(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)狀態圖。稀相(xiang)(xiang)(xiang)(xiang)輸(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)可(ke)(ke)以(yi)被(bei)(bei)(bei)認為(wei)(wei)(wei)(wei)(wei)(wei)是(shi)(shi)一種完全的(de)(de)(de)(de)懸(xuan)(xuan)浮流(liu)(liu)，而密(mi)相(xiang)(xiang)(xiang)(xiang)輸(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)通常(chang)被(bei)(bei)(bei)認為(wei)(wei)(wei)(wei)(wei)(wei)是(shi)(shi)非懸(xuan)(xuan)浮流(liu)(liu)。然而，如圖1所(suo)示，許多不同種類(lei)的(de)(de)(de)(de)密(mi)相(xiang)(xiang)(xiang)(xiang)（非懸(xuan)(xuan)浮流(liu)(liu)）依靠散料(liao)的(de)(de)(de)(de)料(liao)性(xing)和流(liu)(liu)動性(xing)存(cun)在(zai)。密(mi)相(xiang)(xiang)(xiang)(xiang)輸(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)同樣也(ye)能(neng)被(bei)(bei)(bei)定義為(wei)(wei)(wei)(wei)(wei)(wei)輸(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)物料(liao)完全填滿管道截(jie)面的(de)(de)(de)(de)一種輸(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)方式。稀相(xiang)(xiang)(xiang)(xiang)輸(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)通常(chang)需要(yao)使用(yong)大量的(de)(de)(de)(de)高(gao)速(su)(su)(su)氣(qi)體。氣(qi)流(liu)(liu)依靠升力和推動力以(yi)離散粒(li)子(zi)的(de)(de)(de)(de)形式攜帶著(zhu)物料(liao)。參考(kao)圖1中所(suo)述的(de)(de)(de)(de)“懸(xuan)(xuan)浮流(liu)(liu)”，稀相(xiang)(xiang)(xiang)(xiang)系(xi)統通常(chang)是(shi)(shi)最為(wei)(wei)(wei)(wei)(wei)(wei)被(bei)(bei)(bei)廣泛應用(yong)的(de)(de)(de)(de)氣(qi)力輸(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)系(xi)統。由于稀相(xiang)(xiang)(xiang)(xiang)系(xi)統設計的(de)(de)(de)(de)相(xiang)(xiang)(xiang)(xiang)對簡單(dan)性(xing)，它們同時也(ye)被(bei)(bei)(bei)頻繁(fan)的(de)(de)(de)(de)應用(yong)在(zai)工業領域(yu)。輸(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)氣(qi)體的(de)(de)(de)(de)速(su)(su)(su)度(du)減(jian)少到比(bi)保持粒(li)子(zi)懸(xuan)(xuan)浮狀態的(de)(de)(de)(de)臨界(jie)值(zhi)更小(xiao)時，導致物料(liao)在(zai)輸(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)管道的(de)(de)(de)(de)橫截(jie)面形成(cheng)不均勻的(de)(de)(de)(de)分(fen)布。臨界(jie)氣(qi)體速(su)(su)(su)度(du)被(bei)(bei)(bei)稱為(wei)(wei)(wei)(wei)(wei)(wei)是(shi)(shi)水(shui)平(ping)輸(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)的(de)(de)(de)(de)跳躍(yue)速(su)(su)(su)度(du)，垂直輸(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)時堵塞。當水(shui)平(ping)管道中的(de)(de)(de)(de)物料(liao)表(biao)面氣(qi)體速(su)(su)(su)度(du)低(di)于突(tu)變速(su)(su)(su)度(du)時，輸(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)將會以(yi)低(di)流(liu)(liu)量通過管道橫截(jie)面的(de)(de)(de)(de)上部(bu)，在(zai)管道的(de)(de)(de)(de)剩余部(bu)分(fen)以(yi)高(gao)濃度(du)低(di)速(su)(su)(su)度(du)的(de)(de)(de)(de)形式填充。有(you)(you)時沿管道的(de)(de)(de)(de)橫截(jie)面會被(bei)(bei)(bei)填滿，而有(you)(you)時只是(shi)(shi)部(bu)分(fen)被(bei)(bei)(bei)填滿.

實際應(ying)用中, 按照氣(qi)力(li)驅動(dong)形式可以分(fen)為負壓(ya)和(he)(he)正壓(ya)氣(qi)力(li)輸(shu)送(song)(song), 在這兩種輸(shu)送(song)(song)系統中, 根據(ju)流(liu)動(dong)狀(zhuang)態圖再區分(fen)分(fen)為稀相(xiang), 密相(xiang)和(he)(he)流(liu)化態輸(shu)送(song)(song)系統. 除此之外(wai),根據(ju)喂料不(bu)同分(fen)為連續和(he)(he)批次輸(shu)送(song)(song). 在高壓(ya)密相(xiang)輸(shu)送(song)(song)技術中常采用批次的壓(ya)力(li)罐進行高壓(ya)輸(shu)送(song)(song), 同時, 可以組合兩個壓(ya)力(li)罐設(she)計達到(dao)連續的輸(shu)送(song)(song).

密相氣力輸送特(te)點(dian):

● 用氣量小(xiao), 節(jie)能(neng)

● 無殘留輸送

● 不堵塞(sai), 運行可靠

● 維護費用低

● 適合于各類粉粒(li)物料

● 壓力至(zhi)0. 6m p a可(ke)調

● 適合于柔性(xing)化自動生產中(zhong)的物料(liao)高效輸(shu)送