密相氣力輸(shu)送系列

氣力輸送原理

氣力輸(shu)送(song)(song)(song)(song)系(xi)統可(ke)分類為(wei)(wei)不同(tong)的(de)(de)(de)(de)(de)(de)流(liu)(liu)動(dong)(dong)型(xing)式(shi)，其中兩種(zhong)主(zhu)要(yao)型(xing)式(shi)是(shi)：(a) 稀(xi)相(xiang)(xiang)輸(shu)送(song)(song)(song)(song)和(he)(he)（b）密(mi)(mi)(mi)相(xiang)(xiang)輸(shu)送(song)(song)(song)(song)每種(zhong)流(liu)(liu)動(dong)(dong)型(xing)式(shi)可(ke)按物(wu)(wu)料與空(kong)氣的(de)(de)(de)(de)(de)(de)流(liu)(liu)量比(bi)率大(da)(da)小分類，其比(bi)率也被稱(cheng)為(wei)(wei)“固(gu)氣比(bi)”： μ=ms/mf (1)許(xu)多(duo)稀(xi)相(xiang)(xiang)的(de)(de)(de)(de)(de)(de)運行范圍(wei)為(wei)(wei)0＜μ＜15，而(er)密(mi)(mi)(mi)相(xiang)(xiang)通(tong)常是(shi)μ＞15。圖(tu)(tu)1所示的(de)(de)(de)(de)(de)(de)是(shi)典型(xing)輸(shu)送(song)(song)(song)(song)狀態(tai)圖(tu)(tu)。稀(xi)相(xiang)(xiang)輸(shu)送(song)(song)(song)(song)可(ke)以被認為(wei)(wei)是(shi)一種(zhong)完全的(de)(de)(de)(de)(de)(de)懸(xuan)浮(fu)流(liu)(liu)，而(er)密(mi)(mi)(mi)相(xiang)(xiang)輸(shu)送(song)(song)(song)(song)通(tong)常被認為(wei)(wei)是(shi)非(fei)懸(xuan)浮(fu)流(liu)(liu)。然而(er)，如圖(tu)(tu)1所示，許(xu)多(duo)不同(tong)種(zhong)類的(de)(de)(de)(de)(de)(de)密(mi)(mi)(mi)相(xiang)(xiang)（非(fei)懸(xuan)浮(fu)流(liu)(liu)）依(yi)靠散料的(de)(de)(de)(de)(de)(de)料性(xing)和(he)(he)流(liu)(liu)動(dong)(dong)性(xing)存在。密(mi)(mi)(mi)相(xiang)(xiang)輸(shu)送(song)(song)(song)(song)同(tong)樣也能被定義為(wei)(wei)輸(shu)送(song)(song)(song)(song)物(wu)(wu)料完全填(tian)(tian)滿管道(dao)(dao)截(jie)(jie)面(mian)的(de)(de)(de)(de)(de)(de)一種(zhong)輸(shu)送(song)(song)(song)(song)方式(shi)。稀(xi)相(xiang)(xiang)輸(shu)送(song)(song)(song)(song)通(tong)常需要(yao)使用大(da)(da)量的(de)(de)(de)(de)(de)(de)高(gao)速(su)氣體。氣流(liu)(liu)依(yi)靠升力和(he)(he)推動(dong)(dong)力以離(li)散粒子(zi)的(de)(de)(de)(de)(de)(de)形式(shi)攜帶著(zhu)物(wu)(wu)料。參(can)考圖(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)統通(tong)常是(shi)最為(wei)(wei)被廣泛應用的(de)(de)(de)(de)(de)(de)氣力輸(shu)送(song)(song)(song)(song)系(xi)統。由于稀(xi)相(xiang)(xiang)系(xi)統設計的(de)(de)(de)(de)(de)(de)相(xiang)(xiang)對簡單(dan)性(xing)，它們同(tong)時(shi)也被頻(pin)繁的(de)(de)(de)(de)(de)(de)應用在工業(ye)領域(yu)。輸(shu)送(song)(song)(song)(song)氣體的(de)(de)(de)(de)(de)(de)速(su)度(du)(du)減少到比(bi)保(bao)持粒子(zi)懸(xuan)浮(fu)狀態(tai)的(de)(de)(de)(de)(de)(de)臨(lin)界值更小時(shi)，導致物(wu)(wu)料在輸(shu)送(song)(song)(song)(song)管道(dao)(dao)的(de)(de)(de)(de)(de)(de)橫(heng)截(jie)(jie)面(mian)形成(cheng)不均(jun)勻的(de)(de)(de)(de)(de)(de)分布(bu)。臨(lin)界氣體速(su)度(du)(du)被稱(cheng)為(wei)(wei)是(shi)水平輸(shu)送(song)(song)(song)(song)的(de)(de)(de)(de)(de)(de)跳(tiao)躍速(su)度(du)(du)，垂直輸(shu)送(song)(song)(song)(song)時(shi)堵塞(sai)。當水平管道(dao)(dao)中的(de)(de)(de)(de)(de)(de)物(wu)(wu)料表面(mian)氣體速(su)度(du)(du)低于突(tu)變速(su)度(du)(du)時(shi)，輸(shu)送(song)(song)(song)(song)將會以低流(liu)(liu)量通(tong)過(guo)管道(dao)(dao)橫(heng)截(jie)(jie)面(mian)的(de)(de)(de)(de)(de)(de)上部(bu)(bu)，在管道(dao)(dao)的(de)(de)(de)(de)(de)(de)剩余部(bu)(bu)分以高(gao)濃度(du)(du)低速(su)度(du)(du)的(de)(de)(de)(de)(de)(de)形式(shi)填(tian)(tian)充。有(you)時(shi)沿管道(dao)(dao)的(de)(de)(de)(de)(de)(de)橫(heng)截(jie)(jie)面(mian)會被填(tian)(tian)滿，而(er)有(you)時(shi)只(zhi)是(shi)部(bu)(bu)分被填(tian)(tian)滿.

實(shi)際應用(yong)中, 按照(zhao)氣力(li)驅動形式(shi)可以(yi)分為負(fu)壓(ya)(ya)和正壓(ya)(ya)氣力(li)輸(shu)(shu)送(song), 在(zai)這兩(liang)種輸(shu)(shu)送(song)系(xi)(xi)統中, 根據流動狀態(tai)圖再(zai)區(qu)分分為稀相, 密相和流化態(tai)輸(shu)(shu)送(song)系(xi)(xi)統. 除此之外,根據喂料不(bu)同分為連(lian)續和批次(ci)輸(shu)(shu)送(song). 在(zai)高壓(ya)(ya)密相輸(shu)(shu)送(song)技術(shu)中常(chang)采用(yong)批次(ci)的(de)壓(ya)(ya)力(li)罐進行高壓(ya)(ya)輸(shu)(shu)送(song), 同時, 可以(yi)組(zu)合兩(liang)個壓(ya)(ya)力(li)罐設計達到連(lian)續的(de)輸(shu)(shu)送(song).

密相(xiang)氣(qi)力輸送特(te)點:

● 用(yong)氣量小, 節能

● 無殘留(liu)輸送

● 不(bu)堵塞, 運行(xing)可靠

● 維護(hu)費用低

● 適合于各類粉粒物料

● 壓(ya)力(li)至0. 6m p a可調

● 適合于柔性化自動(dong)生產中的物料高效輸送