密相氣力輸(shu)送系列

氣力輸送原(yuan)理(li)

氣(qi)力輸(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)系(xi)統(tong)可分(fen)(fen)類(lei)為(wei)(wei)(wei)不(bu)(bu)同(tong)(tong)的(de)(de)(de)(de)(de)流(liu)動型式(shi)(shi)(shi)，其中兩種(zhong)主要型式(shi)(shi)(shi)是(shi)(shi)(shi)：(a) 稀(xi)相(xiang)(xiang)輸(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)和(he)（b）密(mi)(mi)相(xiang)(xiang)輸(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)每種(zhong)流(liu)動型式(shi)(shi)(shi)可按物(wu)(wu)(wu)料(liao)(liao)與空氣(qi)的(de)(de)(de)(de)(de)流(liu)量(liang)比率(lv)大小(xiao)分(fen)(fen)類(lei)，其比率(lv)也(ye)被稱為(wei)(wei)(wei)“固氣(qi)比”： μ=ms/mf (1)許多稀(xi)相(xiang)(xiang)的(de)(de)(de)(de)(de)運行范(fan)圍為(wei)(wei)(wei)0＜μ＜15，而(er)(er)密(mi)(mi)相(xiang)(xiang)通(tong)常(chang)(chang)是(shi)(shi)(shi)μ＞15。圖1所示(shi)的(de)(de)(de)(de)(de)是(shi)(shi)(shi)典型輸(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)狀態(tai)圖。稀(xi)相(xiang)(xiang)輸(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)可以被認為(wei)(wei)(wei)是(shi)(shi)(shi)一種(zhong)完全的(de)(de)(de)(de)(de)懸浮(fu)流(liu)，而(er)(er)密(mi)(mi)相(xiang)(xiang)輸(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)通(tong)常(chang)(chang)被認為(wei)(wei)(wei)是(shi)(shi)(shi)非懸浮(fu)流(liu)。然而(er)(er)，如圖1所示(shi)，許多不(bu)(bu)同(tong)(tong)種(zhong)類(lei)的(de)(de)(de)(de)(de)密(mi)(mi)相(xiang)(xiang)（非懸浮(fu)流(liu)）依靠(kao)散料(liao)(liao)的(de)(de)(de)(de)(de)料(liao)(liao)性和(he)流(liu)動性存在(zai)。密(mi)(mi)相(xiang)(xiang)輸(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)同(tong)(tong)樣也(ye)能被定義(yi)為(wei)(wei)(wei)輸(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)物(wu)(wu)(wu)料(liao)(liao)完全填(tian)滿管道(dao)(dao)截(jie)面的(de)(de)(de)(de)(de)一種(zhong)輸(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)方(fang)式(shi)(shi)(shi)。稀(xi)相(xiang)(xiang)輸(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)通(tong)常(chang)(chang)需要使用大量(liang)的(de)(de)(de)(de)(de)高(gao)速氣(qi)體。氣(qi)流(liu)依靠(kao)升(sheng)力和(he)推動力以離散粒(li)子(zi)(zi)的(de)(de)(de)(de)(de)形式(shi)(shi)(shi)攜(xie)帶著物(wu)(wu)(wu)料(liao)(liao)。參考圖1中所述的(de)(de)(de)(de)(de)“懸浮(fu)流(liu)”，稀(xi)相(xiang)(xiang)系(xi)統(tong)通(tong)常(chang)(chang)是(shi)(shi)(shi)最為(wei)(wei)(wei)被廣泛應用的(de)(de)(de)(de)(de)氣(qi)力輸(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)系(xi)統(tong)。由于稀(xi)相(xiang)(xiang)系(xi)統(tong)設計的(de)(de)(de)(de)(de)相(xiang)(xiang)對簡單(dan)性，它們同(tong)(tong)時(shi)也(ye)被頻繁的(de)(de)(de)(de)(de)應用在(zai)工(gong)業(ye)領域。輸(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)氣(qi)體的(de)(de)(de)(de)(de)速度減少到比保持粒(li)子(zi)(zi)懸浮(fu)狀態(tai)的(de)(de)(de)(de)(de)臨界值更(geng)小(xiao)時(shi)，導致物(wu)(wu)(wu)料(liao)(liao)在(zai)輸(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)管道(dao)(dao)的(de)(de)(de)(de)(de)橫(heng)截(jie)面形成(cheng)不(bu)(bu)均(jun)勻的(de)(de)(de)(de)(de)分(fen)(fen)布。臨界氣(qi)體速度被稱為(wei)(wei)(wei)是(shi)(shi)(shi)水(shui)平(ping)輸(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)的(de)(de)(de)(de)(de)跳(tiao)躍速度，垂直(zhi)輸(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)時(shi)堵(du)塞(sai)。當水(shui)平(ping)管道(dao)(dao)中的(de)(de)(de)(de)(de)物(wu)(wu)(wu)料(liao)(liao)表(biao)面氣(qi)體速度低(di)于突變速度時(shi)，輸(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)將會以低(di)流(liu)量(liang)通(tong)過(guo)管道(dao)(dao)橫(heng)截(jie)面的(de)(de)(de)(de)(de)上部，在(zai)管道(dao)(dao)的(de)(de)(de)(de)(de)剩余(yu)部分(fen)(fen)以高(gao)濃度低(di)速度的(de)(de)(de)(de)(de)形式(shi)(shi)(shi)填(tian)充(chong)。有時(shi)沿管道(dao)(dao)的(de)(de)(de)(de)(de)橫(heng)截(jie)面會被填(tian)滿，而(er)(er)有時(shi)只是(shi)(shi)(shi)部分(fen)(fen)被填(tian)滿.

實際應(ying)用中, 按照氣(qi)(qi)力驅動(dong)形式可以分(fen)為負(fu)壓(ya)和正壓(ya)氣(qi)(qi)力輸(shu)送(song), 在這兩(liang)種輸(shu)送(song)系(xi)統中, 根(gen)據(ju)流動(dong)狀態圖再(zai)區分(fen)分(fen)為稀(xi)相, 密相和流化態輸(shu)送(song)系(xi)統. 除(chu)此之外(wai),根(gen)據(ju)喂料不同分(fen)為連續和批次輸(shu)送(song). 在高(gao)壓(ya)密相輸(shu)送(song)技術(shu)中常采用批次的(de)(de)壓(ya)力罐進行高(gao)壓(ya)輸(shu)送(song), 同時(shi), 可以組合兩(liang)個壓(ya)力罐設計達到連續的(de)(de)輸(shu)送(song).

密相氣力輸(shu)送特點:

● 用(yong)氣量(liang)小, 節能

● 無殘留輸送

● 不堵塞, 運行可靠(kao)

● 維護費用低(di)

● 適合于各類粉粒(li)物料

● 壓力至0. 6m p a可調

● 適合于(yu)柔性(xing)化(hua)自動生產(chan)中的物料高效輸送