密相氣力(li)輸送系列

氣力輸(shu)送原(yuan)理

氣(qi)力(li)輸送(song)(song)(song)(song)系(xi)統可分(fen)類(lei)為(wei)(wei)(wei)不(bu)同的(de)(de)流(liu)動(dong)型式(shi)，其(qi)(qi)中(zhong)(zhong)兩(liang)種(zhong)主(zhu)要型式(shi)是(shi)(shi)：(a) 稀(xi)(xi)(xi)相(xiang)(xiang)(xiang)輸送(song)(song)(song)(song)和(he)（b）密(mi)(mi)相(xiang)(xiang)(xiang)輸送(song)(song)(song)(song)每(mei)種(zhong)流(liu)動(dong)型式(shi)可按物(wu)(wu)料(liao)(liao)與空(kong)氣(qi)的(de)(de)流(liu)量(liang)比(bi)(bi)率(lv)大(da)小分(fen)類(lei)，其(qi)(qi)比(bi)(bi)率(lv)也(ye)(ye)被(bei)(bei)稱(cheng)為(wei)(wei)(wei)“固氣(qi)比(bi)(bi)”： μ=ms/mf (1)許多稀(xi)(xi)(xi)相(xiang)(xiang)(xiang)的(de)(de)運行范圍(wei)為(wei)(wei)(wei)0＜μ＜15，而(er)(er)密(mi)(mi)相(xiang)(xiang)(xiang)通(tong)常(chang)是(shi)(shi)μ＞15。圖(tu)(tu)1所示(shi)的(de)(de)是(shi)(shi)典型輸送(song)(song)(song)(song)狀態(tai)圖(tu)(tu)。稀(xi)(xi)(xi)相(xiang)(xiang)(xiang)輸送(song)(song)(song)(song)可以(yi)被(bei)(bei)認為(wei)(wei)(wei)是(shi)(shi)一種(zhong)完全(quan)的(de)(de)懸(xuan)浮(fu)(fu)(fu)(fu)流(liu)，而(er)(er)密(mi)(mi)相(xiang)(xiang)(xiang)輸送(song)(song)(song)(song)通(tong)常(chang)被(bei)(bei)認為(wei)(wei)(wei)是(shi)(shi)非(fei)懸(xuan)浮(fu)(fu)(fu)(fu)流(liu)。然而(er)(er)，如圖(tu)(tu)1所示(shi)，許多不(bu)同種(zhong)類(lei)的(de)(de)密(mi)(mi)相(xiang)(xiang)(xiang)（非(fei)懸(xuan)浮(fu)(fu)(fu)(fu)流(liu)）依靠(kao)散料(liao)(liao)的(de)(de)料(liao)(liao)性和(he)流(liu)動(dong)性存在(zai)(zai)。密(mi)(mi)相(xiang)(xiang)(xiang)輸送(song)(song)(song)(song)同樣也(ye)(ye)能被(bei)(bei)定義為(wei)(wei)(wei)輸送(song)(song)(song)(song)物(wu)(wu)料(liao)(liao)完全(quan)填滿管道(dao)截(jie)面(mian)的(de)(de)一種(zhong)輸送(song)(song)(song)(song)方(fang)式(shi)。稀(xi)(xi)(xi)相(xiang)(xiang)(xiang)輸送(song)(song)(song)(song)通(tong)常(chang)需(xu)要使用(yong)大(da)量(liang)的(de)(de)高速(su)(su)氣(qi)體(ti)。氣(qi)流(liu)依靠(kao)升力(li)和(he)推動(dong)力(li)以(yi)離(li)散粒子的(de)(de)形(xing)式(shi)攜帶著(zhu)物(wu)(wu)料(liao)(liao)。參(can)考圖(tu)(tu)1中(zhong)(zhong)所述(shu)的(de)(de)“懸(xuan)浮(fu)(fu)(fu)(fu)流(liu)”，稀(xi)(xi)(xi)相(xiang)(xiang)(xiang)系(xi)統通(tong)常(chang)是(shi)(shi)最為(wei)(wei)(wei)被(bei)(bei)廣泛應用(yong)的(de)(de)氣(qi)力(li)輸送(song)(song)(song)(song)系(xi)統。由于(yu)稀(xi)(xi)(xi)相(xiang)(xiang)(xiang)系(xi)統設計(ji)的(de)(de)相(xiang)(xiang)(xiang)對簡單性，它們(men)同時(shi)(shi)(shi)也(ye)(ye)被(bei)(bei)頻(pin)繁的(de)(de)應用(yong)在(zai)(zai)工業領域。輸送(song)(song)(song)(song)氣(qi)體(ti)的(de)(de)速(su)(su)度(du)減(jian)少(shao)到比(bi)(bi)保持粒子懸(xuan)浮(fu)(fu)(fu)(fu)狀態(tai)的(de)(de)臨界(jie)值更(geng)小時(shi)(shi)(shi)，導致物(wu)(wu)料(liao)(liao)在(zai)(zai)輸送(song)(song)(song)(song)管道(dao)的(de)(de)橫(heng)截(jie)面(mian)形(xing)成不(bu)均勻的(de)(de)分(fen)布。臨界(jie)氣(qi)體(ti)速(su)(su)度(du)被(bei)(bei)稱(cheng)為(wei)(wei)(wei)是(shi)(shi)水平輸送(song)(song)(song)(song)的(de)(de)跳躍速(su)(su)度(du)，垂(chui)直輸送(song)(song)(song)(song)時(shi)(shi)(shi)堵塞。當(dang)水平管道(dao)中(zhong)(zhong)的(de)(de)物(wu)(wu)料(liao)(liao)表面(mian)氣(qi)體(ti)速(su)(su)度(du)低于(yu)突變速(su)(su)度(du)時(shi)(shi)(shi)，輸送(song)(song)(song)(song)將會(hui)以(yi)低流(liu)量(liang)通(tong)過(guo)管道(dao)橫(heng)截(jie)面(mian)的(de)(de)上部(bu)，在(zai)(zai)管道(dao)的(de)(de)剩余部(bu)分(fen)以(yi)高濃(nong)度(du)低速(su)(su)度(du)的(de)(de)形(xing)式(shi)填充。有時(shi)(shi)(shi)沿(yan)管道(dao)的(de)(de)橫(heng)截(jie)面(mian)會(hui)被(bei)(bei)填滿，而(er)(er)有時(shi)(shi)(shi)只是(shi)(shi)部(bu)分(fen)被(bei)(bei)填滿.

實際(ji)應用中, 按照氣(qi)力(li)驅動(dong)形(xing)式可(ke)以(yi)分為負壓(ya)(ya)(ya)和(he)正壓(ya)(ya)(ya)氣(qi)力(li)輸(shu)(shu)送(song)(song), 在(zai)這兩(liang)種(zhong)輸(shu)(shu)送(song)(song)系(xi)統中, 根據(ju)(ju)流動(dong)狀態圖(tu)再區分分為稀相, 密相和(he)流化態輸(shu)(shu)送(song)(song)系(xi)統. 除此之外(wai),根據(ju)(ju)喂(wei)料不同分為連續(xu)和(he)批(pi)次輸(shu)(shu)送(song)(song). 在(zai)高壓(ya)(ya)(ya)密相輸(shu)(shu)送(song)(song)技(ji)術中常(chang)采用批(pi)次的壓(ya)(ya)(ya)力(li)罐(guan)進行高壓(ya)(ya)(ya)輸(shu)(shu)送(song)(song), 同時, 可(ke)以(yi)組合兩(liang)個(ge)壓(ya)(ya)(ya)力(li)罐(guan)設計達到連續(xu)的輸(shu)(shu)送(song)(song).

密(mi)相氣力輸送特點:

● 用氣量小, 節能(neng)

● 無殘留輸送(song)

● 不(bu)堵塞, 運行可靠

● 維護費(fei)用低

● 適合(he)于各類粉粒(li)物料

● 壓力至0. 6m p a可調

● 適合于柔性化自動生產中的物料高(gao)效輸(shu)送