密相(xiang)氣力輸送系列

氣力(li)輸送原(yuan)理

氣(qi)(qi)(qi)(qi)力(li)(li)輸(shu)(shu)(shu)(shu)(shu)送(song)(song)系(xi)(xi)(xi)(xi)統可(ke)(ke)分(fen)(fen)類為不同(tong)(tong)的(de)(de)(de)(de)流(liu)動(dong)型(xing)式，其中(zhong)(zhong)(zhong)兩種(zhong)(zhong)(zhong)主要(yao)(yao)型(xing)式是(shi)(shi)：(a) 稀(xi)相輸(shu)(shu)(shu)(shu)(shu)送(song)(song)和(he)(he)（b）密(mi)相輸(shu)(shu)(shu)(shu)(shu)送(song)(song)每(mei)種(zhong)(zhong)(zhong)流(liu)動(dong)型(xing)式可(ke)(ke)按物(wu)(wu)(wu)料與空氣(qi)(qi)(qi)(qi)的(de)(de)(de)(de)流(liu)量比率大(da)小分(fen)(fen)類，其比率也被(bei)稱為“固(gu)氣(qi)(qi)(qi)(qi)比”： μ=ms/mf (1)許(xu)多稀(xi)相的(de)(de)(de)(de)運行范圍為0＜μ＜15，而(er)(er)密(mi)相通(tong)(tong)常(chang)是(shi)(shi)μ＞15。圖(tu)1所示的(de)(de)(de)(de)是(shi)(shi)典型(xing)輸(shu)(shu)(shu)(shu)(shu)送(song)(song)狀態圖(tu)。稀(xi)相輸(shu)(shu)(shu)(shu)(shu)送(song)(song)可(ke)(ke)以被(bei)認為是(shi)(shi)一種(zhong)(zhong)(zhong)完全的(de)(de)(de)(de)懸浮流(liu)，而(er)(er)密(mi)相輸(shu)(shu)(shu)(shu)(shu)送(song)(song)通(tong)(tong)常(chang)被(bei)認為是(shi)(shi)非(fei)懸浮流(liu)。然而(er)(er)，如圖(tu)1所示，許(xu)多不同(tong)(tong)種(zhong)(zhong)(zhong)類的(de)(de)(de)(de)密(mi)相（非(fei)懸浮流(liu)）依靠散(san)料的(de)(de)(de)(de)料性(xing)和(he)(he)流(liu)動(dong)性(xing)存在(zai)(zai)(zai)。密(mi)相輸(shu)(shu)(shu)(shu)(shu)送(song)(song)同(tong)(tong)樣也能(neng)被(bei)定義(yi)為輸(shu)(shu)(shu)(shu)(shu)送(song)(song)物(wu)(wu)(wu)料完全填(tian)滿(man)管(guan)道(dao)(dao)截面(mian)的(de)(de)(de)(de)一種(zhong)(zhong)(zhong)輸(shu)(shu)(shu)(shu)(shu)送(song)(song)方式。稀(xi)相輸(shu)(shu)(shu)(shu)(shu)送(song)(song)通(tong)(tong)常(chang)需要(yao)(yao)使(shi)用(yong)(yong)大(da)量的(de)(de)(de)(de)高速(su)氣(qi)(qi)(qi)(qi)體。氣(qi)(qi)(qi)(qi)流(liu)依靠升(sheng)力(li)(li)和(he)(he)推動(dong)力(li)(li)以離散(san)粒(li)子的(de)(de)(de)(de)形式攜帶著物(wu)(wu)(wu)料。參考圖(tu)1中(zhong)(zhong)(zhong)所述的(de)(de)(de)(de)“懸浮流(liu)”，稀(xi)相系(xi)(xi)(xi)(xi)統通(tong)(tong)常(chang)是(shi)(shi)最為被(bei)廣泛應用(yong)(yong)的(de)(de)(de)(de)氣(qi)(qi)(qi)(qi)力(li)(li)輸(shu)(shu)(shu)(shu)(shu)送(song)(song)系(xi)(xi)(xi)(xi)統。由于(yu)稀(xi)相系(xi)(xi)(xi)(xi)統設計的(de)(de)(de)(de)相對簡單性(xing)，它們(men)同(tong)(tong)時也被(bei)頻(pin)繁的(de)(de)(de)(de)應用(yong)(yong)在(zai)(zai)(zai)工業領域。輸(shu)(shu)(shu)(shu)(shu)送(song)(song)氣(qi)(qi)(qi)(qi)體的(de)(de)(de)(de)速(su)度(du)(du)(du)(du)(du)減少(shao)到比保持粒(li)子懸浮狀態的(de)(de)(de)(de)臨界(jie)值更(geng)小時，導致物(wu)(wu)(wu)料在(zai)(zai)(zai)輸(shu)(shu)(shu)(shu)(shu)送(song)(song)管(guan)道(dao)(dao)的(de)(de)(de)(de)橫(heng)(heng)截面(mian)形成不均勻的(de)(de)(de)(de)分(fen)(fen)布。臨界(jie)氣(qi)(qi)(qi)(qi)體速(su)度(du)(du)(du)(du)(du)被(bei)稱為是(shi)(shi)水(shui)平輸(shu)(shu)(shu)(shu)(shu)送(song)(song)的(de)(de)(de)(de)跳躍(yue)速(su)度(du)(du)(du)(du)(du)，垂(chui)直輸(shu)(shu)(shu)(shu)(shu)送(song)(song)時堵(du)塞(sai)。當(dang)水(shui)平管(guan)道(dao)(dao)中(zhong)(zhong)(zhong)的(de)(de)(de)(de)物(wu)(wu)(wu)料表面(mian)氣(qi)(qi)(qi)(qi)體速(su)度(du)(du)(du)(du)(du)低(di)(di)于(yu)突(tu)變速(su)度(du)(du)(du)(du)(du)時，輸(shu)(shu)(shu)(shu)(shu)送(song)(song)將(jiang)會以低(di)(di)流(liu)量通(tong)(tong)過管(guan)道(dao)(dao)橫(heng)(heng)截面(mian)的(de)(de)(de)(de)上部(bu)，在(zai)(zai)(zai)管(guan)道(dao)(dao)的(de)(de)(de)(de)剩余部(bu)分(fen)(fen)以高濃(nong)度(du)(du)(du)(du)(du)低(di)(di)速(su)度(du)(du)(du)(du)(du)的(de)(de)(de)(de)形式填(tian)充。有(you)時沿管(guan)道(dao)(dao)的(de)(de)(de)(de)橫(heng)(heng)截面(mian)會被(bei)填(tian)滿(man)，而(er)(er)有(you)時只是(shi)(shi)部(bu)分(fen)(fen)被(bei)填(tian)滿(man).

實際應用(yong)中(zhong), 按(an)照氣力(li)驅動形式可以(yi)分(fen)為(wei)負壓和正壓氣力(li)輸送, 在這兩種輸送系(xi)統(tong)(tong)中(zhong), 根據(ju)流動狀態圖(tu)再區分(fen)分(fen)為(wei)稀相(xiang), 密相(xiang)和流化態輸送系(xi)統(tong)(tong). 除此之(zhi)外,根據(ju)喂料不同(tong)分(fen)為(wei)連(lian)續和批(pi)(pi)次輸送. 在高壓密相(xiang)輸送技術(shu)中(zhong)常采用(yong)批(pi)(pi)次的壓力(li)罐(guan)進(jin)行高壓輸送, 同(tong)時, 可以(yi)組(zu)合兩個壓力(li)罐(guan)設計達到連(lian)續的輸送.

密相氣力輸送(song)特點:

● 用(yong)氣(qi)量小(xiao), 節能

● 無殘留輸送

● 不堵(du)塞, 運行(xing)可(ke)靠

● 維護費用低

● 適合于各類粉(fen)粒(li)物料

● 壓(ya)力至(zhi)0. 6m p a可調

● 適合于柔性化自(zi)動生產(chan)中的物料高效輸送