密(mi)相氣力輸送系列

氣(qi)力(li)輸(shu)送原理

氣(qi)(qi)(qi)(qi)力輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)系統可(ke)分(fen)類(lei)為(wei)不(bu)(bu)同的(de)(de)(de)(de)流(liu)(liu)動型式，其中兩(liang)種(zhong)(zhong)主(zhu)要型式是(shi)(shi)：(a) 稀(xi)(xi)相(xiang)(xiang)(xiang)(xiang)(xiang)輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)和（b）密相(xiang)(xiang)(xiang)(xiang)(xiang)輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)每種(zhong)(zhong)流(liu)(liu)動型式可(ke)按(an)物(wu)料(liao)與空氣(qi)(qi)(qi)(qi)的(de)(de)(de)(de)流(liu)(liu)量比(bi)率大小(xiao)分(fen)類(lei)，其比(bi)率也被稱為(wei)“固氣(qi)(qi)(qi)(qi)比(bi)”： μ=ms/mf (1)許(xu)多稀(xi)(xi)相(xiang)(xiang)(xiang)(xiang)(xiang)的(de)(de)(de)(de)運行(xing)范(fan)圍為(wei)0＜μ＜15，而(er)密相(xiang)(xiang)(xiang)(xiang)(xiang)通(tong)(tong)(tong)常是(shi)(shi)μ＞15。圖1所(suo)示的(de)(de)(de)(de)是(shi)(shi)典型輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)狀(zhuang)態圖。稀(xi)(xi)相(xiang)(xiang)(xiang)(xiang)(xiang)輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)可(ke)以(yi)被認(ren)為(wei)是(shi)(shi)一種(zhong)(zhong)完全的(de)(de)(de)(de)懸(xuan)浮流(liu)(liu)，而(er)密相(xiang)(xiang)(xiang)(xiang)(xiang)輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)通(tong)(tong)(tong)常被認(ren)為(wei)是(shi)(shi)非懸(xuan)浮流(liu)(liu)。然而(er)，如圖1所(suo)示，許(xu)多不(bu)(bu)同種(zhong)(zhong)類(lei)的(de)(de)(de)(de)密相(xiang)(xiang)(xiang)(xiang)(xiang)（非懸(xuan)浮流(liu)(liu)）依(yi)靠散(san)(san)料(liao)的(de)(de)(de)(de)料(liao)性(xing)和流(liu)(liu)動性(xing)存在(zai)(zai)(zai)。密相(xiang)(xiang)(xiang)(xiang)(xiang)輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)同樣也能被定義為(wei)輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)物(wu)料(liao)完全填(tian)滿(man)管(guan)(guan)道(dao)(dao)(dao)(dao)截(jie)面(mian)(mian)的(de)(de)(de)(de)一種(zhong)(zhong)輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)方式。稀(xi)(xi)相(xiang)(xiang)(xiang)(xiang)(xiang)輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)通(tong)(tong)(tong)常需(xu)要使(shi)用大量的(de)(de)(de)(de)高速氣(qi)(qi)(qi)(qi)體(ti)。氣(qi)(qi)(qi)(qi)流(liu)(liu)依(yi)靠升力和推動力以(yi)離散(san)(san)粒(li)子的(de)(de)(de)(de)形式攜帶著物(wu)料(liao)。參考圖1中所(suo)述的(de)(de)(de)(de)“懸(xuan)浮流(liu)(liu)”，稀(xi)(xi)相(xiang)(xiang)(xiang)(xiang)(xiang)系統通(tong)(tong)(tong)常是(shi)(shi)最(zui)為(wei)被廣泛應用的(de)(de)(de)(de)氣(qi)(qi)(qi)(qi)力輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)系統。由于稀(xi)(xi)相(xiang)(xiang)(xiang)(xiang)(xiang)系統設計(ji)的(de)(de)(de)(de)相(xiang)(xiang)(xiang)(xiang)(xiang)對簡單性(xing)，它(ta)們同時也被頻繁的(de)(de)(de)(de)應用在(zai)(zai)(zai)工業(ye)領域。輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)氣(qi)(qi)(qi)(qi)體(ti)的(de)(de)(de)(de)速度減少到比(bi)保持粒(li)子懸(xuan)浮狀(zhuang)態的(de)(de)(de)(de)臨(lin)界(jie)值更小(xiao)時，導致物(wu)料(liao)在(zai)(zai)(zai)輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)管(guan)(guan)道(dao)(dao)(dao)(dao)的(de)(de)(de)(de)橫(heng)截(jie)面(mian)(mian)形成不(bu)(bu)均勻(yun)的(de)(de)(de)(de)分(fen)布。臨(lin)界(jie)氣(qi)(qi)(qi)(qi)體(ti)速度被稱為(wei)是(shi)(shi)水平輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)的(de)(de)(de)(de)跳(tiao)躍(yue)速度，垂直輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)時堵塞。當水平管(guan)(guan)道(dao)(dao)(dao)(dao)中的(de)(de)(de)(de)物(wu)料(liao)表面(mian)(mian)氣(qi)(qi)(qi)(qi)體(ti)速度低(di)于突(tu)變速度時，輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)將會(hui)以(yi)低(di)流(liu)(liu)量通(tong)(tong)(tong)過管(guan)(guan)道(dao)(dao)(dao)(dao)橫(heng)截(jie)面(mian)(mian)的(de)(de)(de)(de)上部(bu)，在(zai)(zai)(zai)管(guan)(guan)道(dao)(dao)(dao)(dao)的(de)(de)(de)(de)剩余(yu)部(bu)分(fen)以(yi)高濃度低(di)速度的(de)(de)(de)(de)形式填(tian)充。有時沿管(guan)(guan)道(dao)(dao)(dao)(dao)的(de)(de)(de)(de)橫(heng)截(jie)面(mian)(mian)會(hui)被填(tian)滿(man)，而(er)有時只是(shi)(shi)部(bu)分(fen)被填(tian)滿(man).

實際(ji)應用中(zhong), 按照(zhao)氣力(li)驅動(dong)形式可(ke)以分(fen)(fen)為負壓(ya)(ya)(ya)和(he)(he)正(zheng)壓(ya)(ya)(ya)氣力(li)輸(shu)送(song), 在這兩種輸(shu)送(song)系(xi)統中(zhong), 根據流動(dong)狀(zhuang)態(tai)圖(tu)再區(qu)分(fen)(fen)分(fen)(fen)為稀(xi)相, 密相和(he)(he)流化態(tai)輸(shu)送(song)系(xi)統. 除此之外(wai),根據喂料不同分(fen)(fen)為連續(xu)和(he)(he)批次(ci)(ci)輸(shu)送(song). 在高(gao)壓(ya)(ya)(ya)密相輸(shu)送(song)技(ji)術中(zhong)常(chang)采用批次(ci)(ci)的(de)壓(ya)(ya)(ya)力(li)罐進(jin)行高(gao)壓(ya)(ya)(ya)輸(shu)送(song), 同時, 可(ke)以組合(he)兩個壓(ya)(ya)(ya)力(li)罐設(she)計達到連續(xu)的(de)輸(shu)送(song).

密相氣(qi)力輸送特點:

● 用氣量小, 節(jie)能

● 無殘(can)留輸送

● 不堵塞(sai), 運行可靠

● 維護費用(yong)低

● 適合于各類粉粒物料

● 壓(ya)力(li)至(zhi)0. 6m p a可調

● 適合于(yu)柔性化(hua)自動生(sheng)產中的物(wu)料高效(xiao)輸送