密(mi)相氣力輸送系列

氣力輸送原理

氣(qi)力(li)輸(shu)(shu)(shu)送(song)(song)(song)系統(tong)可(ke)分(fen)類(lei)(lei)為(wei)不(bu)同的(de)(de)(de)(de)(de)(de)流(liu)(liu)動型式，其中兩種(zhong)主要型式是(shi)：(a) 稀(xi)相(xiang)(xiang)輸(shu)(shu)(shu)送(song)(song)(song)和(he)（b）密(mi)相(xiang)(xiang)輸(shu)(shu)(shu)送(song)(song)(song)每種(zhong)流(liu)(liu)動型式可(ke)按(an)物(wu)料(liao)與空氣(qi)的(de)(de)(de)(de)(de)(de)流(liu)(liu)量比(bi)率大小分(fen)類(lei)(lei)，其比(bi)率也被(bei)(bei)稱為(wei)“固氣(qi)比(bi)”： μ=ms/mf (1)許(xu)多稀(xi)相(xiang)(xiang)的(de)(de)(de)(de)(de)(de)運行范圍為(wei)0＜μ＜15，而(er)密(mi)相(xiang)(xiang)通(tong)常(chang)(chang)是(shi)μ＞15。圖(tu)1所示(shi)的(de)(de)(de)(de)(de)(de)是(shi)典型輸(shu)(shu)(shu)送(song)(song)(song)狀(zhuang)(zhuang)態(tai)圖(tu)。稀(xi)相(xiang)(xiang)輸(shu)(shu)(shu)送(song)(song)(song)可(ke)以(yi)被(bei)(bei)認(ren)為(wei)是(shi)一(yi)種(zhong)完(wan)全(quan)的(de)(de)(de)(de)(de)(de)懸(xuan)(xuan)浮(fu)流(liu)(liu)，而(er)密(mi)相(xiang)(xiang)輸(shu)(shu)(shu)送(song)(song)(song)通(tong)常(chang)(chang)被(bei)(bei)認(ren)為(wei)是(shi)非(fei)懸(xuan)(xuan)浮(fu)流(liu)(liu)。然而(er)，如(ru)圖(tu)1所示(shi)，許(xu)多不(bu)同種(zhong)類(lei)(lei)的(de)(de)(de)(de)(de)(de)密(mi)相(xiang)(xiang)（非(fei)懸(xuan)(xuan)浮(fu)流(liu)(liu)）依靠(kao)散料(liao)的(de)(de)(de)(de)(de)(de)料(liao)性(xing)(xing)和(he)流(liu)(liu)動性(xing)(xing)存在(zai)(zai)。密(mi)相(xiang)(xiang)輸(shu)(shu)(shu)送(song)(song)(song)同樣也能被(bei)(bei)定義為(wei)輸(shu)(shu)(shu)送(song)(song)(song)物(wu)料(liao)完(wan)全(quan)填滿管(guan)(guan)道(dao)截(jie)面(mian)(mian)的(de)(de)(de)(de)(de)(de)一(yi)種(zhong)輸(shu)(shu)(shu)送(song)(song)(song)方式。稀(xi)相(xiang)(xiang)輸(shu)(shu)(shu)送(song)(song)(song)通(tong)常(chang)(chang)需(xu)要使用(yong)大量的(de)(de)(de)(de)(de)(de)高速(su)(su)氣(qi)體。氣(qi)流(liu)(liu)依靠(kao)升力(li)和(he)推動力(li)以(yi)離散粒(li)子(zi)的(de)(de)(de)(de)(de)(de)形式攜帶著物(wu)料(liao)。參考圖(tu)1中所述的(de)(de)(de)(de)(de)(de)“懸(xuan)(xuan)浮(fu)流(liu)(liu)”，稀(xi)相(xiang)(xiang)系統(tong)通(tong)常(chang)(chang)是(shi)最為(wei)被(bei)(bei)廣泛應(ying)用(yong)的(de)(de)(de)(de)(de)(de)氣(qi)力(li)輸(shu)(shu)(shu)送(song)(song)(song)系統(tong)。由(you)于稀(xi)相(xiang)(xiang)系統(tong)設計(ji)的(de)(de)(de)(de)(de)(de)相(xiang)(xiang)對簡(jian)單(dan)性(xing)(xing)，它們同時(shi)(shi)也被(bei)(bei)頻繁(fan)的(de)(de)(de)(de)(de)(de)應(ying)用(yong)在(zai)(zai)工業領域。輸(shu)(shu)(shu)送(song)(song)(song)氣(qi)體的(de)(de)(de)(de)(de)(de)速(su)(su)度(du)(du)(du)減少到比(bi)保持(chi)粒(li)子(zi)懸(xuan)(xuan)浮(fu)狀(zhuang)(zhuang)態(tai)的(de)(de)(de)(de)(de)(de)臨(lin)界值更小時(shi)(shi)，導致物(wu)料(liao)在(zai)(zai)輸(shu)(shu)(shu)送(song)(song)(song)管(guan)(guan)道(dao)的(de)(de)(de)(de)(de)(de)橫(heng)截(jie)面(mian)(mian)形成不(bu)均勻(yun)的(de)(de)(de)(de)(de)(de)分(fen)布(bu)。臨(lin)界氣(qi)體速(su)(su)度(du)(du)(du)被(bei)(bei)稱為(wei)是(shi)水平輸(shu)(shu)(shu)送(song)(song)(song)的(de)(de)(de)(de)(de)(de)跳躍速(su)(su)度(du)(du)(du)，垂(chui)直輸(shu)(shu)(shu)送(song)(song)(song)時(shi)(shi)堵(du)塞。當水平管(guan)(guan)道(dao)中的(de)(de)(de)(de)(de)(de)物(wu)料(liao)表面(mian)(mian)氣(qi)體速(su)(su)度(du)(du)(du)低(di)于突變(bian)速(su)(su)度(du)(du)(du)時(shi)(shi)，輸(shu)(shu)(shu)送(song)(song)(song)將會(hui)以(yi)低(di)流(liu)(liu)量通(tong)過管(guan)(guan)道(dao)橫(heng)截(jie)面(mian)(mian)的(de)(de)(de)(de)(de)(de)上部(bu)，在(zai)(zai)管(guan)(guan)道(dao)的(de)(de)(de)(de)(de)(de)剩(sheng)余部(bu)分(fen)以(yi)高濃(nong)度(du)(du)(du)低(di)速(su)(su)度(du)(du)(du)的(de)(de)(de)(de)(de)(de)形式填充(chong)。有(you)時(shi)(shi)沿管(guan)(guan)道(dao)的(de)(de)(de)(de)(de)(de)橫(heng)截(jie)面(mian)(mian)會(hui)被(bei)(bei)填滿，而(er)有(you)時(shi)(shi)只是(shi)部(bu)分(fen)被(bei)(bei)填滿.

實際應用中, 按照氣(qi)力(li)(li)驅動形式可(ke)(ke)以分(fen)(fen)(fen)為(wei)(wei)負(fu)壓(ya)和正(zheng)壓(ya)氣(qi)力(li)(li)輸(shu)送(song), 在這兩(liang)種輸(shu)送(song)系統中, 根據流動狀態圖(tu)再區分(fen)(fen)(fen)分(fen)(fen)(fen)為(wei)(wei)稀相(xiang), 密(mi)相(xiang)和流化態輸(shu)送(song)系統. 除此之(zhi)外(wai),根據喂料不同分(fen)(fen)(fen)為(wei)(wei)連續和批次(ci)輸(shu)送(song). 在高壓(ya)密(mi)相(xiang)輸(shu)送(song)技術中常采用批次(ci)的壓(ya)力(li)(li)罐進行高壓(ya)輸(shu)送(song), 同時, 可(ke)(ke)以組合兩(liang)個壓(ya)力(li)(li)罐設計達到連續的輸(shu)送(song).

密相氣力輸送特點:

● 用氣量小, 節能

● 無殘(can)留(liu)輸送(song)

● 不堵塞, 運行(xing)可(ke)靠

● 維護費用低

● 適合于(yu)各類粉粒物料

● 壓力至0. 6m p a可調

● 適合于柔性化自動(dong)生產中(zhong)的物料高效輸送