密相氣力輸送系列

氣力輸送(song)原理

氣(qi)(qi)力(li)輸(shu)(shu)(shu)送(song)(song)(song)系(xi)統可分類(lei)(lei)為(wei)不(bu)同的(de)(de)(de)(de)(de)流(liu)動(dong)(dong)型(xing)式(shi)(shi)(shi)，其中兩種(zhong)主要型(xing)式(shi)(shi)(shi)是(shi)(shi)：(a) 稀相(xiang)(xiang)(xiang)(xiang)輸(shu)(shu)(shu)送(song)(song)(song)和（b）密(mi)相(xiang)(xiang)(xiang)(xiang)輸(shu)(shu)(shu)送(song)(song)(song)每種(zhong)流(liu)動(dong)(dong)型(xing)式(shi)(shi)(shi)可按物(wu)料與(yu)空(kong)氣(qi)(qi)的(de)(de)(de)(de)(de)流(liu)量(liang)比率大小(xiao)分類(lei)(lei)，其比率也(ye)(ye)被(bei)(bei)稱為(wei)“固氣(qi)(qi)比”： μ=ms/mf (1)許(xu)多(duo)稀相(xiang)(xiang)(xiang)(xiang)的(de)(de)(de)(de)(de)運行范(fan)圍為(wei)0＜μ＜15，而密(mi)相(xiang)(xiang)(xiang)(xiang)通(tong)常(chang)是(shi)(shi)μ＞15。圖(tu)(tu)1所(suo)示(shi)的(de)(de)(de)(de)(de)是(shi)(shi)典型(xing)輸(shu)(shu)(shu)送(song)(song)(song)狀態圖(tu)(tu)。稀相(xiang)(xiang)(xiang)(xiang)輸(shu)(shu)(shu)送(song)(song)(song)可以(yi)被(bei)(bei)認為(wei)是(shi)(shi)一種(zhong)完全的(de)(de)(de)(de)(de)懸(xuan)(xuan)浮流(liu)，而密(mi)相(xiang)(xiang)(xiang)(xiang)輸(shu)(shu)(shu)送(song)(song)(song)通(tong)常(chang)被(bei)(bei)認為(wei)是(shi)(shi)非懸(xuan)(xuan)浮流(liu)。然而，如圖(tu)(tu)1所(suo)示(shi)，許(xu)多(duo)不(bu)同種(zhong)類(lei)(lei)的(de)(de)(de)(de)(de)密(mi)相(xiang)(xiang)(xiang)(xiang)（非懸(xuan)(xuan)浮流(liu)）依(yi)靠散料的(de)(de)(de)(de)(de)料性(xing)和流(liu)動(dong)(dong)性(xing)存在。密(mi)相(xiang)(xiang)(xiang)(xiang)輸(shu)(shu)(shu)送(song)(song)(song)同樣(yang)也(ye)(ye)能被(bei)(bei)定(ding)義為(wei)輸(shu)(shu)(shu)送(song)(song)(song)物(wu)料完全填(tian)滿管(guan)(guan)道(dao)截(jie)面(mian)的(de)(de)(de)(de)(de)一種(zhong)輸(shu)(shu)(shu)送(song)(song)(song)方式(shi)(shi)(shi)。稀相(xiang)(xiang)(xiang)(xiang)輸(shu)(shu)(shu)送(song)(song)(song)通(tong)常(chang)需要使用(yong)大量(liang)的(de)(de)(de)(de)(de)高速(su)氣(qi)(qi)體(ti)。氣(qi)(qi)流(liu)依(yi)靠升力(li)和推動(dong)(dong)力(li)以(yi)離(li)散粒子的(de)(de)(de)(de)(de)形(xing)(xing)(xing)式(shi)(shi)(shi)攜帶著物(wu)料。參考(kao)圖(tu)(tu)1中所(suo)述的(de)(de)(de)(de)(de)“懸(xuan)(xuan)浮流(liu)”，稀相(xiang)(xiang)(xiang)(xiang)系(xi)統通(tong)常(chang)是(shi)(shi)最(zui)為(wei)被(bei)(bei)廣(guang)泛應用(yong)的(de)(de)(de)(de)(de)氣(qi)(qi)力(li)輸(shu)(shu)(shu)送(song)(song)(song)系(xi)統。由(you)于(yu)(yu)稀相(xiang)(xiang)(xiang)(xiang)系(xi)統設(she)計的(de)(de)(de)(de)(de)相(xiang)(xiang)(xiang)(xiang)對簡單性(xing)，它們同時(shi)(shi)(shi)也(ye)(ye)被(bei)(bei)頻(pin)繁的(de)(de)(de)(de)(de)應用(yong)在工業(ye)領域(yu)。輸(shu)(shu)(shu)送(song)(song)(song)氣(qi)(qi)體(ti)的(de)(de)(de)(de)(de)速(su)度(du)減少到比保持粒子懸(xuan)(xuan)浮狀態的(de)(de)(de)(de)(de)臨(lin)界(jie)值更小(xiao)時(shi)(shi)(shi)，導(dao)致(zhi)物(wu)料在輸(shu)(shu)(shu)送(song)(song)(song)管(guan)(guan)道(dao)的(de)(de)(de)(de)(de)橫截(jie)面(mian)形(xing)(xing)(xing)成(cheng)不(bu)均勻的(de)(de)(de)(de)(de)分布(bu)。臨(lin)界(jie)氣(qi)(qi)體(ti)速(su)度(du)被(bei)(bei)稱為(wei)是(shi)(shi)水(shui)平輸(shu)(shu)(shu)送(song)(song)(song)的(de)(de)(de)(de)(de)跳躍(yue)速(su)度(du)，垂直輸(shu)(shu)(shu)送(song)(song)(song)時(shi)(shi)(shi)堵(du)塞。當水(shui)平管(guan)(guan)道(dao)中的(de)(de)(de)(de)(de)物(wu)料表面(mian)氣(qi)(qi)體(ti)速(su)度(du)低于(yu)(yu)突(tu)變速(su)度(du)時(shi)(shi)(shi)，輸(shu)(shu)(shu)送(song)(song)(song)將會(hui)以(yi)低流(liu)量(liang)通(tong)過(guo)管(guan)(guan)道(dao)橫截(jie)面(mian)的(de)(de)(de)(de)(de)上(shang)部(bu)(bu)，在管(guan)(guan)道(dao)的(de)(de)(de)(de)(de)剩余(yu)部(bu)(bu)分以(yi)高濃度(du)低速(su)度(du)的(de)(de)(de)(de)(de)形(xing)(xing)(xing)式(shi)(shi)(shi)填(tian)充。有時(shi)(shi)(shi)沿管(guan)(guan)道(dao)的(de)(de)(de)(de)(de)橫截(jie)面(mian)會(hui)被(bei)(bei)填(tian)滿，而有時(shi)(shi)(shi)只(zhi)是(shi)(shi)部(bu)(bu)分被(bei)(bei)填(tian)滿.

實際(ji)應用中, 按照氣力(li)驅動形式可(ke)以分為(wei)負壓(ya)(ya)和正(zheng)壓(ya)(ya)氣力(li)輸送(song), 在(zai)這兩種(zhong)輸送(song)系(xi)統(tong)中, 根據流動狀態圖再區分分為(wei)稀相, 密(mi)相和流化態輸送(song)系(xi)統(tong). 除(chu)此之外,根據喂料(liao)不同(tong)分為(wei)連續和批次輸送(song). 在(zai)高壓(ya)(ya)密(mi)相輸送(song)技(ji)術中常采用批次的壓(ya)(ya)力(li)罐(guan)進(jin)行高壓(ya)(ya)輸送(song), 同(tong)時(shi), 可(ke)以組(zu)合(he)兩個壓(ya)(ya)力(li)罐(guan)設計達到(dao)連續的輸送(song).

密(mi)相氣力輸送特點:

● 用(yong)氣量小(xiao), 節能

● 無殘留輸送

● 不堵塞, 運行(xing)可靠

● 維護費用低

● 適合于各類粉粒物料

● 壓力至(zhi)0. 6m p a可調

● 適(shi)合于柔性化自動生產中(zhong)的物料(liao)高(gao)效輸送