密相氣力輸送系列

氣力(li)輸送原理

氣(qi)(qi)力輸送(song)(song)(song)(song)系(xi)統(tong)(tong)可(ke)分(fen)(fen)類(lei)為(wei)(wei)不同(tong)的(de)(de)(de)(de)流(liu)(liu)動(dong)(dong)型式，其中(zhong)兩種(zhong)主(zhu)要型式是(shi)(shi)：(a) 稀(xi)相(xiang)(xiang)(xiang)輸送(song)(song)(song)(song)和（b）密相(xiang)(xiang)(xiang)輸送(song)(song)(song)(song)每種(zhong)流(liu)(liu)動(dong)(dong)型式可(ke)按物(wu)(wu)(wu)料(liao)與空氣(qi)(qi)的(de)(de)(de)(de)流(liu)(liu)量比率大(da)小分(fen)(fen)類(lei)，其比率也(ye)(ye)被稱為(wei)(wei)“固氣(qi)(qi)比”： μ=ms/mf (1)許(xu)多稀(xi)相(xiang)(xiang)(xiang)的(de)(de)(de)(de)運行范(fan)圍為(wei)(wei)0＜μ＜15，而(er)密相(xiang)(xiang)(xiang)通(tong)常是(shi)(shi)μ＞15。圖(tu)1所(suo)示的(de)(de)(de)(de)是(shi)(shi)典型輸送(song)(song)(song)(song)狀態圖(tu)。稀(xi)相(xiang)(xiang)(xiang)輸送(song)(song)(song)(song)可(ke)以被認為(wei)(wei)是(shi)(shi)一(yi)種(zhong)完全的(de)(de)(de)(de)懸(xuan)(xuan)浮(fu)流(liu)(liu)，而(er)密相(xiang)(xiang)(xiang)輸送(song)(song)(song)(song)通(tong)常被認為(wei)(wei)是(shi)(shi)非懸(xuan)(xuan)浮(fu)流(liu)(liu)。然而(er)，如圖(tu)1所(suo)示，許(xu)多不同(tong)種(zhong)類(lei)的(de)(de)(de)(de)密相(xiang)(xiang)(xiang)（非懸(xuan)(xuan)浮(fu)流(liu)(liu)）依靠(kao)散(san)料(liao)的(de)(de)(de)(de)料(liao)性和流(liu)(liu)動(dong)(dong)性存在。密相(xiang)(xiang)(xiang)輸送(song)(song)(song)(song)同(tong)樣也(ye)(ye)能(neng)被定義為(wei)(wei)輸送(song)(song)(song)(song)物(wu)(wu)(wu)料(liao)完全填(tian)滿管道截(jie)(jie)面(mian)的(de)(de)(de)(de)一(yi)種(zhong)輸送(song)(song)(song)(song)方式。稀(xi)相(xiang)(xiang)(xiang)輸送(song)(song)(song)(song)通(tong)常需要使用大(da)量的(de)(de)(de)(de)高(gao)速氣(qi)(qi)體(ti)。氣(qi)(qi)流(liu)(liu)依靠(kao)升(sheng)力和推動(dong)(dong)力以離(li)散(san)粒(li)子的(de)(de)(de)(de)形(xing)(xing)式攜(xie)帶(dai)著(zhu)物(wu)(wu)(wu)料(liao)。參考圖(tu)1中(zhong)所(suo)述的(de)(de)(de)(de)“懸(xuan)(xuan)浮(fu)流(liu)(liu)”，稀(xi)相(xiang)(xiang)(xiang)系(xi)統(tong)(tong)通(tong)常是(shi)(shi)最(zui)為(wei)(wei)被廣(guang)泛應用的(de)(de)(de)(de)氣(qi)(qi)力輸送(song)(song)(song)(song)系(xi)統(tong)(tong)。由于(yu)稀(xi)相(xiang)(xiang)(xiang)系(xi)統(tong)(tong)設(she)計(ji)的(de)(de)(de)(de)相(xiang)(xiang)(xiang)對簡單性，它們同(tong)時(shi)也(ye)(ye)被頻(pin)繁的(de)(de)(de)(de)應用在工(gong)業領域(yu)。輸送(song)(song)(song)(song)氣(qi)(qi)體(ti)的(de)(de)(de)(de)速度(du)(du)減少到比保持粒(li)子懸(xuan)(xuan)浮(fu)狀態的(de)(de)(de)(de)臨界(jie)值更小時(shi)，導致物(wu)(wu)(wu)料(liao)在輸送(song)(song)(song)(song)管道的(de)(de)(de)(de)橫(heng)截(jie)(jie)面(mian)形(xing)(xing)成不均勻的(de)(de)(de)(de)分(fen)(fen)布。臨界(jie)氣(qi)(qi)體(ti)速度(du)(du)被稱為(wei)(wei)是(shi)(shi)水平(ping)輸送(song)(song)(song)(song)的(de)(de)(de)(de)跳躍速度(du)(du)，垂直輸送(song)(song)(song)(song)時(shi)堵塞。當(dang)水平(ping)管道中(zhong)的(de)(de)(de)(de)物(wu)(wu)(wu)料(liao)表面(mian)氣(qi)(qi)體(ti)速度(du)(du)低(di)于(yu)突變速度(du)(du)時(shi)，輸送(song)(song)(song)(song)將會以低(di)流(liu)(liu)量通(tong)過管道橫(heng)截(jie)(jie)面(mian)的(de)(de)(de)(de)上部，在管道的(de)(de)(de)(de)剩(sheng)余部分(fen)(fen)以高(gao)濃(nong)度(du)(du)低(di)速度(du)(du)的(de)(de)(de)(de)形(xing)(xing)式填(tian)充。有(you)時(shi)沿管道的(de)(de)(de)(de)橫(heng)截(jie)(jie)面(mian)會被填(tian)滿，而(er)有(you)時(shi)只是(shi)(shi)部分(fen)(fen)被填(tian)滿.

實(shi)際(ji)應用(yong)(yong)中(zhong), 按(an)照氣(qi)(qi)力驅動形式(shi)可以(yi)分(fen)為負壓(ya)(ya)和(he)正壓(ya)(ya)氣(qi)(qi)力輸送(song)(song)(song), 在(zai)這兩種輸送(song)(song)(song)系(xi)統中(zhong), 根據流(liu)動狀態(tai)圖再區分(fen)分(fen)為稀相(xiang), 密(mi)相(xiang)和(he)流(liu)化態(tai)輸送(song)(song)(song)系(xi)統. 除此之外(wai),根據喂料不同分(fen)為連續(xu)和(he)批次輸送(song)(song)(song). 在(zai)高壓(ya)(ya)密(mi)相(xiang)輸送(song)(song)(song)技術中(zhong)常采用(yong)(yong)批次的(de)(de)壓(ya)(ya)力罐進行(xing)高壓(ya)(ya)輸送(song)(song)(song), 同時, 可以(yi)組合兩個壓(ya)(ya)力罐設計(ji)達(da)到連續(xu)的(de)(de)輸送(song)(song)(song).

密相(xiang)氣(qi)力輸(shu)送特點:

● 用氣量小, 節能

● 無殘留輸送

● 不(bu)堵塞, 運(yun)行可靠

● 維護費用低

● 適合于各類粉粒物料

● 壓力(li)至0. 6m p a可調

● 適合于(yu)柔(rou)性化自動生(sheng)產中(zhong)的物料高效輸送