密相氣力輸(shu)送系(xi)列

氣力(li)輸送原理

氣(qi)力(li)輸(shu)送(song)(song)(song)(song)(song)(song)系(xi)統(tong)可分(fen)(fen)類為(wei)不同的(de)(de)(de)流(liu)(liu)動(dong)型式(shi)(shi)，其(qi)(qi)中兩種(zhong)(zhong)主要型式(shi)(shi)是：(a) 稀(xi)相(xiang)輸(shu)送(song)(song)(song)(song)(song)(song)和（b）密(mi)(mi)相(xiang)輸(shu)送(song)(song)(song)(song)(song)(song)每種(zhong)(zhong)流(liu)(liu)動(dong)型式(shi)(shi)可按物(wu)(wu)(wu)料(liao)與空(kong)氣(qi)的(de)(de)(de)流(liu)(liu)量比(bi)(bi)率大小分(fen)(fen)類，其(qi)(qi)比(bi)(bi)率也被(bei)稱(cheng)(cheng)為(wei)“固氣(qi)比(bi)(bi)”： μ=ms/mf (1)許(xu)多稀(xi)相(xiang)的(de)(de)(de)運行范圍(wei)為(wei)0＜μ＜15，而(er)密(mi)(mi)相(xiang)通常(chang)是μ＞15。圖(tu)(tu)(tu)1所示(shi)的(de)(de)(de)是典型輸(shu)送(song)(song)(song)(song)(song)(song)狀態圖(tu)(tu)(tu)。稀(xi)相(xiang)輸(shu)送(song)(song)(song)(song)(song)(song)可以被(bei)認為(wei)是一(yi)(yi)種(zhong)(zhong)完(wan)全的(de)(de)(de)懸(xuan)(xuan)浮(fu)(fu)流(liu)(liu)，而(er)密(mi)(mi)相(xiang)輸(shu)送(song)(song)(song)(song)(song)(song)通常(chang)被(bei)認為(wei)是非懸(xuan)(xuan)浮(fu)(fu)流(liu)(liu)。然而(er)，如圖(tu)(tu)(tu)1所示(shi)，許(xu)多不同種(zhong)(zhong)類的(de)(de)(de)密(mi)(mi)相(xiang)（非懸(xuan)(xuan)浮(fu)(fu)流(liu)(liu)）依(yi)靠(kao)(kao)散料(liao)的(de)(de)(de)料(liao)性和流(liu)(liu)動(dong)性存(cun)在(zai)(zai)。密(mi)(mi)相(xiang)輸(shu)送(song)(song)(song)(song)(song)(song)同樣(yang)也能被(bei)定義為(wei)輸(shu)送(song)(song)(song)(song)(song)(song)物(wu)(wu)(wu)料(liao)完(wan)全填滿管(guan)(guan)道截(jie)(jie)面(mian)(mian)的(de)(de)(de)一(yi)(yi)種(zhong)(zhong)輸(shu)送(song)(song)(song)(song)(song)(song)方(fang)式(shi)(shi)。稀(xi)相(xiang)輸(shu)送(song)(song)(song)(song)(song)(song)通常(chang)需要使用大量的(de)(de)(de)高(gao)速(su)氣(qi)體(ti)。氣(qi)流(liu)(liu)依(yi)靠(kao)(kao)升力(li)和推動(dong)力(li)以離散粒子(zi)(zi)的(de)(de)(de)形(xing)式(shi)(shi)攜帶著物(wu)(wu)(wu)料(liao)。參(can)考(kao)圖(tu)(tu)(tu)1中所述的(de)(de)(de)“懸(xuan)(xuan)浮(fu)(fu)流(liu)(liu)”，稀(xi)相(xiang)系(xi)統(tong)通常(chang)是最為(wei)被(bei)廣泛應(ying)用的(de)(de)(de)氣(qi)力(li)輸(shu)送(song)(song)(song)(song)(song)(song)系(xi)統(tong)。由(you)于(yu)稀(xi)相(xiang)系(xi)統(tong)設計的(de)(de)(de)相(xiang)對簡單性，它們同時也被(bei)頻(pin)繁的(de)(de)(de)應(ying)用在(zai)(zai)工(gong)業領域。輸(shu)送(song)(song)(song)(song)(song)(song)氣(qi)體(ti)的(de)(de)(de)速(su)度(du)(du)減少到(dao)比(bi)(bi)保(bao)持粒子(zi)(zi)懸(xuan)(xuan)浮(fu)(fu)狀態的(de)(de)(de)臨界值更小時，導致物(wu)(wu)(wu)料(liao)在(zai)(zai)輸(shu)送(song)(song)(song)(song)(song)(song)管(guan)(guan)道的(de)(de)(de)橫(heng)(heng)截(jie)(jie)面(mian)(mian)形(xing)成(cheng)不均(jun)勻(yun)的(de)(de)(de)分(fen)(fen)布。臨界氣(qi)體(ti)速(su)度(du)(du)被(bei)稱(cheng)(cheng)為(wei)是水平輸(shu)送(song)(song)(song)(song)(song)(song)的(de)(de)(de)跳躍速(su)度(du)(du)，垂直輸(shu)送(song)(song)(song)(song)(song)(song)時堵塞。當水平管(guan)(guan)道中的(de)(de)(de)物(wu)(wu)(wu)料(liao)表(biao)面(mian)(mian)氣(qi)體(ti)速(su)度(du)(du)低(di)于(yu)突變速(su)度(du)(du)時，輸(shu)送(song)(song)(song)(song)(song)(song)將會以低(di)流(liu)(liu)量通過管(guan)(guan)道橫(heng)(heng)截(jie)(jie)面(mian)(mian)的(de)(de)(de)上部，在(zai)(zai)管(guan)(guan)道的(de)(de)(de)剩余部分(fen)(fen)以高(gao)濃度(du)(du)低(di)速(su)度(du)(du)的(de)(de)(de)形(xing)式(shi)(shi)填充。有時沿管(guan)(guan)道的(de)(de)(de)橫(heng)(heng)截(jie)(jie)面(mian)(mian)會被(bei)填滿，而(er)有時只是部分(fen)(fen)被(bei)填滿.

實際應用(yong)中(zhong)(zhong), 按照氣力(li)驅(qu)動形式可(ke)以分(fen)(fen)為負壓(ya)(ya)和(he)正壓(ya)(ya)氣力(li)輸送(song)(song), 在這(zhe)兩種輸送(song)(song)系統(tong)中(zhong)(zhong), 根據流(liu)動狀態圖再(zai)區分(fen)(fen)分(fen)(fen)為稀相, 密(mi)相和(he)流(liu)化態輸送(song)(song)系統(tong). 除(chu)此之外(wai),根據喂(wei)料不同分(fen)(fen)為連續和(he)批(pi)(pi)次輸送(song)(song). 在高壓(ya)(ya)密(mi)相輸送(song)(song)技(ji)術中(zhong)(zhong)常采用(yong)批(pi)(pi)次的壓(ya)(ya)力(li)罐進行高壓(ya)(ya)輸送(song)(song), 同時, 可(ke)以組合兩個壓(ya)(ya)力(li)罐設計達(da)到連續的輸送(song)(song).

密相氣力輸送特點(dian):

● 用(yong)氣(qi)量小, 節能

● 無殘留輸送

● 不堵塞, 運行可靠

● 維護費用低

● 適合于各類粉粒物(wu)料

● 壓力至0. 6m p a可調(diao)

● 適(shi)合于柔(rou)性(xing)化自動(dong)生產中(zhong)的物(wu)料高(gao)效輸(shu)送