密相氣力(li)輸(shu)送系(xi)列(lie)

氣力輸送原理

氣(qi)力輸(shu)(shu)送(song)(song)(song)(song)(song)(song)(song)系統(tong)可分類為(wei)不同的(de)(de)(de)流(liu)動型(xing)式(shi)(shi)，其(qi)中兩種(zhong)(zhong)主要型(xing)式(shi)(shi)是(shi)(shi)：(a) 稀相(xiang)(xiang)(xiang)輸(shu)(shu)送(song)(song)(song)(song)(song)(song)(song)和（b）密相(xiang)(xiang)(xiang)輸(shu)(shu)送(song)(song)(song)(song)(song)(song)(song)每種(zhong)(zhong)流(liu)動型(xing)式(shi)(shi)可按物料與空氣(qi)的(de)(de)(de)流(liu)量(liang)(liang)比率大小分類，其(qi)比率也(ye)被稱(cheng)為(wei)“固氣(qi)比”： μ=ms/mf (1)許多稀相(xiang)(xiang)(xiang)的(de)(de)(de)運行范圍為(wei)0＜μ＜15，而(er)密相(xiang)(xiang)(xiang)通(tong)(tong)常(chang)(chang)是(shi)(shi)μ＞15。圖(tu)1所示(shi)的(de)(de)(de)是(shi)(shi)典型(xing)輸(shu)(shu)送(song)(song)(song)(song)(song)(song)(song)狀態圖(tu)。稀相(xiang)(xiang)(xiang)輸(shu)(shu)送(song)(song)(song)(song)(song)(song)(song)可以(yi)被認(ren)為(wei)是(shi)(shi)一種(zhong)(zhong)完全的(de)(de)(de)懸(xuan)浮(fu)流(liu)，而(er)密相(xiang)(xiang)(xiang)輸(shu)(shu)送(song)(song)(song)(song)(song)(song)(song)通(tong)(tong)常(chang)(chang)被認(ren)為(wei)是(shi)(shi)非(fei)懸(xuan)浮(fu)流(liu)。然而(er)，如圖(tu)1所示(shi)，許多不同種(zhong)(zhong)類的(de)(de)(de)密相(xiang)(xiang)(xiang)（非(fei)懸(xuan)浮(fu)流(liu)）依(yi)靠散(san)料的(de)(de)(de)料性和流(liu)動性存在(zai)(zai)。密相(xiang)(xiang)(xiang)輸(shu)(shu)送(song)(song)(song)(song)(song)(song)(song)同樣也(ye)能被定義(yi)為(wei)輸(shu)(shu)送(song)(song)(song)(song)(song)(song)(song)物料完全填滿管(guan)道(dao)截面(mian)的(de)(de)(de)一種(zhong)(zhong)輸(shu)(shu)送(song)(song)(song)(song)(song)(song)(song)方式(shi)(shi)。稀相(xiang)(xiang)(xiang)輸(shu)(shu)送(song)(song)(song)(song)(song)(song)(song)通(tong)(tong)常(chang)(chang)需要使用(yong)大量(liang)(liang)的(de)(de)(de)高(gao)速(su)(su)氣(qi)體。氣(qi)流(liu)依(yi)靠升力和推動力以(yi)離散(san)粒子(zi)的(de)(de)(de)形式(shi)(shi)攜帶著物料。參考(kao)圖(tu)1中所述的(de)(de)(de)“懸(xuan)浮(fu)流(liu)”，稀相(xiang)(xiang)(xiang)系統(tong)通(tong)(tong)常(chang)(chang)是(shi)(shi)最為(wei)被廣泛(fan)應用(yong)的(de)(de)(de)氣(qi)力輸(shu)(shu)送(song)(song)(song)(song)(song)(song)(song)系統(tong)。由(you)于稀相(xiang)(xiang)(xiang)系統(tong)設計的(de)(de)(de)相(xiang)(xiang)(xiang)對簡單性，它們同時(shi)(shi)也(ye)被頻繁的(de)(de)(de)應用(yong)在(zai)(zai)工業領域。輸(shu)(shu)送(song)(song)(song)(song)(song)(song)(song)氣(qi)體的(de)(de)(de)速(su)(su)度(du)(du)(du)減少到(dao)比保(bao)持粒子(zi)懸(xuan)浮(fu)狀態的(de)(de)(de)臨(lin)界值更小時(shi)(shi)，導致物料在(zai)(zai)輸(shu)(shu)送(song)(song)(song)(song)(song)(song)(song)管(guan)道(dao)的(de)(de)(de)橫(heng)截面(mian)形成(cheng)不均勻(yun)的(de)(de)(de)分布。臨(lin)界氣(qi)體速(su)(su)度(du)(du)(du)被稱(cheng)為(wei)是(shi)(shi)水平輸(shu)(shu)送(song)(song)(song)(song)(song)(song)(song)的(de)(de)(de)跳躍速(su)(su)度(du)(du)(du)，垂直輸(shu)(shu)送(song)(song)(song)(song)(song)(song)(song)時(shi)(shi)堵塞(sai)。當水平管(guan)道(dao)中的(de)(de)(de)物料表面(mian)氣(qi)體速(su)(su)度(du)(du)(du)低于突(tu)變速(su)(su)度(du)(du)(du)時(shi)(shi)，輸(shu)(shu)送(song)(song)(song)(song)(song)(song)(song)將(jiang)會以(yi)低流(liu)量(liang)(liang)通(tong)(tong)過(guo)管(guan)道(dao)橫(heng)截面(mian)的(de)(de)(de)上部(bu)，在(zai)(zai)管(guan)道(dao)的(de)(de)(de)剩余部(bu)分以(yi)高(gao)濃(nong)度(du)(du)(du)低速(su)(su)度(du)(du)(du)的(de)(de)(de)形式(shi)(shi)填充。有(you)時(shi)(shi)沿管(guan)道(dao)的(de)(de)(de)橫(heng)截面(mian)會被填滿，而(er)有(you)時(shi)(shi)只是(shi)(shi)部(bu)分被填滿.

實際(ji)應(ying)用中, 按(an)照氣(qi)力(li)(li)驅動形(xing)式可以分為(wei)負壓(ya)和正壓(ya)氣(qi)力(li)(li)輸(shu)送(song)(song), 在這(zhe)兩種輸(shu)送(song)(song)系統中, 根據流動狀(zhuang)態圖再區分分為(wei)稀相, 密相和流化態輸(shu)送(song)(song)系統. 除此之(zhi)外,根據喂(wei)料不同(tong)分為(wei)連續(xu)和批(pi)次(ci)(ci)輸(shu)送(song)(song). 在高壓(ya)密相輸(shu)送(song)(song)技術中常采用批(pi)次(ci)(ci)的(de)(de)壓(ya)力(li)(li)罐(guan)進行高壓(ya)輸(shu)送(song)(song), 同(tong)時, 可以組(zu)合兩個壓(ya)力(li)(li)罐(guan)設(she)計達到(dao)連續(xu)的(de)(de)輸(shu)送(song)(song).

密相氣力(li)輸送特點:

● 用(yong)氣(qi)量小, 節(jie)能(neng)

● 無殘(can)留輸送

● 不堵塞, 運行可靠(kao)

● 維護費(fei)用低(di)

● 適(shi)合于各(ge)類粉粒物(wu)料

● 壓力至0. 6m p a可(ke)調

● 適(shi)合于柔性化(hua)自動生產中的物(wu)料高效輸送