密相氣力輸送系列

氣(qi)力輸送原理

氣(qi)力(li)輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)系(xi)(xi)統可(ke)分類為(wei)(wei)不(bu)同(tong)(tong)的(de)(de)流(liu)(liu)(liu)動型(xing)(xing)式(shi)(shi)，其中(zhong)兩種主要(yao)型(xing)(xing)式(shi)(shi)是：(a) 稀相(xiang)(xiang)(xiang)(xiang)輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)和(he)(he)（b）密(mi)(mi)相(xiang)(xiang)(xiang)(xiang)輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)每(mei)種流(liu)(liu)(liu)動型(xing)(xing)式(shi)(shi)可(ke)按物(wu)料與空氣(qi)的(de)(de)流(liu)(liu)(liu)量比(bi)率大小分類，其比(bi)率也(ye)被(bei)稱為(wei)(wei)“固氣(qi)比(bi)”： μ=ms/mf (1)許多稀相(xiang)(xiang)(xiang)(xiang)的(de)(de)運行(xing)范圍為(wei)(wei)0＜μ＜15，而(er)密(mi)(mi)相(xiang)(xiang)(xiang)(xiang)通常是μ＞15。圖(tu)1所示的(de)(de)是典型(xing)(xing)輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)狀(zhuang)態(tai)圖(tu)。稀相(xiang)(xiang)(xiang)(xiang)輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)可(ke)以(yi)(yi)被(bei)認(ren)為(wei)(wei)是一種完全的(de)(de)懸(xuan)(xuan)(xuan)(xuan)浮(fu)流(liu)(liu)(liu)，而(er)密(mi)(mi)相(xiang)(xiang)(xiang)(xiang)輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)通常被(bei)認(ren)為(wei)(wei)是非懸(xuan)(xuan)(xuan)(xuan)浮(fu)流(liu)(liu)(liu)。然而(er)，如圖(tu)1所示，許多不(bu)同(tong)(tong)種類的(de)(de)密(mi)(mi)相(xiang)(xiang)(xiang)(xiang)（非懸(xuan)(xuan)(xuan)(xuan)浮(fu)流(liu)(liu)(liu)）依(yi)靠散料的(de)(de)料性(xing)和(he)(he)流(liu)(liu)(liu)動性(xing)存在(zai)。密(mi)(mi)相(xiang)(xiang)(xiang)(xiang)輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)同(tong)(tong)樣也(ye)能被(bei)定義為(wei)(wei)輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)物(wu)料完全填(tian)(tian)滿管(guan)道截(jie)面的(de)(de)一種輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)方式(shi)(shi)。稀相(xiang)(xiang)(xiang)(xiang)輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)通常需要(yao)使用大量的(de)(de)高速(su)氣(qi)體。氣(qi)流(liu)(liu)(liu)依(yi)靠升力(li)和(he)(he)推動力(li)以(yi)(yi)離(li)散粒(li)子(zi)的(de)(de)形式(shi)(shi)攜(xie)帶著(zhu)物(wu)料。參考(kao)圖(tu)1中(zhong)所述的(de)(de)“懸(xuan)(xuan)(xuan)(xuan)浮(fu)流(liu)(liu)(liu)”，稀相(xiang)(xiang)(xiang)(xiang)系(xi)(xi)統通常是最(zui)為(wei)(wei)被(bei)廣泛應用的(de)(de)氣(qi)力(li)輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)系(xi)(xi)統。由于稀相(xiang)(xiang)(xiang)(xiang)系(xi)(xi)統設計的(de)(de)相(xiang)(xiang)(xiang)(xiang)對簡單性(xing)，它們同(tong)(tong)時(shi)也(ye)被(bei)頻繁的(de)(de)應用在(zai)工業(ye)領域(yu)。輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)氣(qi)體的(de)(de)速(su)度(du)減少到比(bi)保持粒(li)子(zi)懸(xuan)(xuan)(xuan)(xuan)浮(fu)狀(zhuang)態(tai)的(de)(de)臨(lin)界值(zhi)更小時(shi)，導致物(wu)料在(zai)輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)管(guan)道的(de)(de)橫截(jie)面形成不(bu)均勻的(de)(de)分布。臨(lin)界氣(qi)體速(su)度(du)被(bei)稱為(wei)(wei)是水平輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)的(de)(de)跳躍(yue)速(su)度(du)，垂直輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)時(shi)堵塞。當水平管(guan)道中(zhong)的(de)(de)物(wu)料表面氣(qi)體速(su)度(du)低于突變速(su)度(du)時(shi)，輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)將會以(yi)(yi)低流(liu)(liu)(liu)量通過(guo)管(guan)道橫截(jie)面的(de)(de)上(shang)部(bu)，在(zai)管(guan)道的(de)(de)剩(sheng)余(yu)部(bu)分以(yi)(yi)高濃度(du)低速(su)度(du)的(de)(de)形式(shi)(shi)填(tian)(tian)充。有時(shi)沿管(guan)道的(de)(de)橫截(jie)面會被(bei)填(tian)(tian)滿，而(er)有時(shi)只是部(bu)分被(bei)填(tian)(tian)滿.

實際(ji)應用中, 按照氣力(li)驅動形式可以分(fen)為負壓(ya)(ya)(ya)和正壓(ya)(ya)(ya)氣力(li)輸(shu)(shu)送(song)(song)(song)(song), 在這兩種輸(shu)(shu)送(song)(song)(song)(song)系統中, 根(gen)據流動狀態圖再區分(fen)分(fen)為稀相(xiang), 密(mi)(mi)相(xiang)和流化態輸(shu)(shu)送(song)(song)(song)(song)系統. 除此之外,根(gen)據喂料不同分(fen)為連(lian)續和批次輸(shu)(shu)送(song)(song)(song)(song). 在高壓(ya)(ya)(ya)密(mi)(mi)相(xiang)輸(shu)(shu)送(song)(song)(song)(song)技術中常采(cai)用批次的(de)壓(ya)(ya)(ya)力(li)罐進行(xing)高壓(ya)(ya)(ya)輸(shu)(shu)送(song)(song)(song)(song), 同時, 可以組合兩個壓(ya)(ya)(ya)力(li)罐設計達到連(lian)續的(de)輸(shu)(shu)送(song)(song)(song)(song).

密相氣(qi)力(li)輸送(song)特點:

● 用(yong)氣量小, 節能

● 無殘留輸(shu)送

● 不堵塞(sai), 運行(xing)可靠(kao)

● 維護費(fei)用低(di)

● 適合于各類粉粒物料

● 壓(ya)力至(zhi)0. 6m p a可調

● 適合于(yu)柔性化自動(dong)生(sheng)產(chan)中(zhong)的物料高效輸送