密(mi)相氣(qi)力輸送系列

氣力輸送原(yuan)理

氣力(li)輸(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)系(xi)統(tong)(tong)可(ke)(ke)分(fen)(fen)類為(wei)不同的(de)(de)(de)(de)(de)流(liu)(liu)(liu)(liu)動(dong)(dong)型式，其(qi)中兩種主(zhu)要型式是：(a) 稀(xi)相(xiang)(xiang)(xiang)(xiang)輸(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)和(he)（b）密相(xiang)(xiang)(xiang)(xiang)輸(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)每種流(liu)(liu)(liu)(liu)動(dong)(dong)型式可(ke)(ke)按物(wu)(wu)料(liao)與空氣的(de)(de)(de)(de)(de)流(liu)(liu)(liu)(liu)量(liang)比(bi)率大(da)小分(fen)(fen)類，其(qi)比(bi)率也被(bei)(bei)(bei)稱(cheng)為(wei)“固氣比(bi)”： μ=ms/mf (1)許(xu)多稀(xi)相(xiang)(xiang)(xiang)(xiang)的(de)(de)(de)(de)(de)運行(xing)范(fan)圍為(wei)0＜μ＜15，而(er)密相(xiang)(xiang)(xiang)(xiang)通常是μ＞15。圖(tu)1所(suo)示的(de)(de)(de)(de)(de)是典型輸(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)狀態圖(tu)。稀(xi)相(xiang)(xiang)(xiang)(xiang)輸(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)可(ke)(ke)以(yi)被(bei)(bei)(bei)認(ren)為(wei)是一(yi)種完全的(de)(de)(de)(de)(de)懸(xuan)浮(fu)流(liu)(liu)(liu)(liu)，而(er)密相(xiang)(xiang)(xiang)(xiang)輸(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)通常被(bei)(bei)(bei)認(ren)為(wei)是非(fei)懸(xuan)浮(fu)流(liu)(liu)(liu)(liu)。然而(er)，如圖(tu)1所(suo)示，許(xu)多不同種類的(de)(de)(de)(de)(de)密相(xiang)(xiang)(xiang)(xiang)（非(fei)懸(xuan)浮(fu)流(liu)(liu)(liu)(liu)）依靠散料(liao)的(de)(de)(de)(de)(de)料(liao)性(xing)和(he)流(liu)(liu)(liu)(liu)動(dong)(dong)性(xing)存在(zai)。密相(xiang)(xiang)(xiang)(xiang)輸(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)同樣也能(neng)被(bei)(bei)(bei)定義為(wei)輸(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)物(wu)(wu)料(liao)完全填(tian)滿(man)管(guan)道(dao)截面的(de)(de)(de)(de)(de)一(yi)種輸(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)方式。稀(xi)相(xiang)(xiang)(xiang)(xiang)輸(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)通常需要使用(yong)大(da)量(liang)的(de)(de)(de)(de)(de)高速(su)氣體(ti)。氣流(liu)(liu)(liu)(liu)依靠升力(li)和(he)推動(dong)(dong)力(li)以(yi)離散粒子(zi)的(de)(de)(de)(de)(de)形式攜帶著物(wu)(wu)料(liao)。參考圖(tu)1中所(suo)述的(de)(de)(de)(de)(de)“懸(xuan)浮(fu)流(liu)(liu)(liu)(liu)”，稀(xi)相(xiang)(xiang)(xiang)(xiang)系(xi)統(tong)(tong)通常是最為(wei)被(bei)(bei)(bei)廣泛應用(yong)的(de)(de)(de)(de)(de)氣力(li)輸(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)系(xi)統(tong)(tong)。由于稀(xi)相(xiang)(xiang)(xiang)(xiang)系(xi)統(tong)(tong)設計的(de)(de)(de)(de)(de)相(xiang)(xiang)(xiang)(xiang)對簡單性(xing)，它們(men)同時(shi)也被(bei)(bei)(bei)頻(pin)繁的(de)(de)(de)(de)(de)應用(yong)在(zai)工業領域。輸(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)氣體(ti)的(de)(de)(de)(de)(de)速(su)度(du)(du)(du)減少到比(bi)保持粒子(zi)懸(xuan)浮(fu)狀態的(de)(de)(de)(de)(de)臨界(jie)值更小時(shi)，導(dao)致(zhi)物(wu)(wu)料(liao)在(zai)輸(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)管(guan)道(dao)的(de)(de)(de)(de)(de)橫(heng)截面形成(cheng)不均勻(yun)的(de)(de)(de)(de)(de)分(fen)(fen)布。臨界(jie)氣體(ti)速(su)度(du)(du)(du)被(bei)(bei)(bei)稱(cheng)為(wei)是水平(ping)輸(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)的(de)(de)(de)(de)(de)跳躍速(su)度(du)(du)(du)，垂直(zhi)輸(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)時(shi)堵塞。當水平(ping)管(guan)道(dao)中的(de)(de)(de)(de)(de)物(wu)(wu)料(liao)表面氣體(ti)速(su)度(du)(du)(du)低于突變速(su)度(du)(du)(du)時(shi)，輸(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)將(jiang)會以(yi)低流(liu)(liu)(liu)(liu)量(liang)通過管(guan)道(dao)橫(heng)截面的(de)(de)(de)(de)(de)上部(bu)，在(zai)管(guan)道(dao)的(de)(de)(de)(de)(de)剩余(yu)部(bu)分(fen)(fen)以(yi)高濃度(du)(du)(du)低速(su)度(du)(du)(du)的(de)(de)(de)(de)(de)形式填(tian)充。有時(shi)沿管(guan)道(dao)的(de)(de)(de)(de)(de)橫(heng)截面會被(bei)(bei)(bei)填(tian)滿(man)，而(er)有時(shi)只是部(bu)分(fen)(fen)被(bei)(bei)(bei)填(tian)滿(man).

實際應用(yong)中, 按(an)照(zhao)氣力(li)驅動(dong)形式可以分(fen)(fen)為(wei)負壓(ya)(ya)和正壓(ya)(ya)氣力(li)輸(shu)(shu)(shu)送, 在(zai)這(zhe)兩(liang)(liang)種輸(shu)(shu)(shu)送系統(tong)中, 根(gen)據流動(dong)狀態(tai)圖再區(qu)分(fen)(fen)分(fen)(fen)為(wei)稀相(xiang)(xiang), 密(mi)相(xiang)(xiang)和流化態(tai)輸(shu)(shu)(shu)送系統(tong). 除此之外,根(gen)據喂(wei)料(liao)不(bu)同分(fen)(fen)為(wei)連續(xu)和批次輸(shu)(shu)(shu)送. 在(zai)高壓(ya)(ya)密(mi)相(xiang)(xiang)輸(shu)(shu)(shu)送技術中常(chang)采用(yong)批次的(de)壓(ya)(ya)力(li)罐進行高壓(ya)(ya)輸(shu)(shu)(shu)送, 同時, 可以組合兩(liang)(liang)個壓(ya)(ya)力(li)罐設計達到連續(xu)的(de)輸(shu)(shu)(shu)送.

密相氣力輸送特點:

● 用(yong)氣(qi)量(liang)小, 節(jie)能

● 無殘留(liu)輸(shu)送(song)

● 不堵塞, 運(yun)行可靠(kao)

● 維護費(fei)用低(di)

● 適合于各類粉粒物(wu)料

● 壓(ya)力(li)至0. 6m p a可調

● 適(shi)合于柔性化自動生(sheng)產中(zhong)的物料(liao)高效(xiao)輸送