密相氣力輸送系列

氣(qi)力輸送原理

氣(qi)(qi)力(li)(li)輸(shu)(shu)送(song)(song)(song)系統(tong)可(ke)(ke)分(fen)類為(wei)不(bu)同的(de)(de)(de)(de)(de)(de)(de)(de)(de)流(liu)(liu)(liu)動(dong)型(xing)式(shi)(shi)，其中兩種(zhong)主要型(xing)式(shi)(shi)是(shi)(shi)(shi)(shi)：(a) 稀(xi)相(xiang)(xiang)輸(shu)(shu)送(song)(song)(song)和（b）密(mi)(mi)相(xiang)(xiang)輸(shu)(shu)送(song)(song)(song)每種(zhong)流(liu)(liu)(liu)動(dong)型(xing)式(shi)(shi)可(ke)(ke)按(an)物(wu)料(liao)(liao)(liao)與空氣(qi)(qi)的(de)(de)(de)(de)(de)(de)(de)(de)(de)流(liu)(liu)(liu)量(liang)比率大小分(fen)類，其比率也被(bei)(bei)(bei)(bei)稱為(wei)“固氣(qi)(qi)比”： μ=ms/mf (1)許多(duo)稀(xi)相(xiang)(xiang)的(de)(de)(de)(de)(de)(de)(de)(de)(de)運(yun)行(xing)范圍為(wei)0＜μ＜15，而(er)密(mi)(mi)相(xiang)(xiang)通(tong)(tong)(tong)常(chang)是(shi)(shi)(shi)(shi)μ＞15。圖(tu)1所示的(de)(de)(de)(de)(de)(de)(de)(de)(de)是(shi)(shi)(shi)(shi)典(dian)型(xing)輸(shu)(shu)送(song)(song)(song)狀態(tai)圖(tu)。稀(xi)相(xiang)(xiang)輸(shu)(shu)送(song)(song)(song)可(ke)(ke)以(yi)被(bei)(bei)(bei)(bei)認(ren)(ren)為(wei)是(shi)(shi)(shi)(shi)一種(zhong)完(wan)全(quan)(quan)的(de)(de)(de)(de)(de)(de)(de)(de)(de)懸(xuan)(xuan)浮(fu)流(liu)(liu)(liu)，而(er)密(mi)(mi)相(xiang)(xiang)輸(shu)(shu)送(song)(song)(song)通(tong)(tong)(tong)常(chang)被(bei)(bei)(bei)(bei)認(ren)(ren)為(wei)是(shi)(shi)(shi)(shi)非懸(xuan)(xuan)浮(fu)流(liu)(liu)(liu)。然而(er)，如圖(tu)1所示，許多(duo)不(bu)同種(zhong)類的(de)(de)(de)(de)(de)(de)(de)(de)(de)密(mi)(mi)相(xiang)(xiang)（非懸(xuan)(xuan)浮(fu)流(liu)(liu)(liu)）依靠散料(liao)(liao)(liao)的(de)(de)(de)(de)(de)(de)(de)(de)(de)料(liao)(liao)(liao)性(xing)(xing)和流(liu)(liu)(liu)動(dong)性(xing)(xing)存在(zai)(zai)。密(mi)(mi)相(xiang)(xiang)輸(shu)(shu)送(song)(song)(song)同樣也能被(bei)(bei)(bei)(bei)定(ding)義為(wei)輸(shu)(shu)送(song)(song)(song)物(wu)料(liao)(liao)(liao)完(wan)全(quan)(quan)填滿管道(dao)(dao)(dao)截(jie)面(mian)(mian)的(de)(de)(de)(de)(de)(de)(de)(de)(de)一種(zhong)輸(shu)(shu)送(song)(song)(song)方式(shi)(shi)。稀(xi)相(xiang)(xiang)輸(shu)(shu)送(song)(song)(song)通(tong)(tong)(tong)常(chang)需要使用(yong)大量(liang)的(de)(de)(de)(de)(de)(de)(de)(de)(de)高速(su)(su)(su)氣(qi)(qi)體。氣(qi)(qi)流(liu)(liu)(liu)依靠升力(li)(li)和推動(dong)力(li)(li)以(yi)離散粒(li)子的(de)(de)(de)(de)(de)(de)(de)(de)(de)形式(shi)(shi)攜帶(dai)著物(wu)料(liao)(liao)(liao)。參考圖(tu)1中所述(shu)的(de)(de)(de)(de)(de)(de)(de)(de)(de)“懸(xuan)(xuan)浮(fu)流(liu)(liu)(liu)”，稀(xi)相(xiang)(xiang)系統(tong)通(tong)(tong)(tong)常(chang)是(shi)(shi)(shi)(shi)最為(wei)被(bei)(bei)(bei)(bei)廣泛(fan)應用(yong)的(de)(de)(de)(de)(de)(de)(de)(de)(de)氣(qi)(qi)力(li)(li)輸(shu)(shu)送(song)(song)(song)系統(tong)。由于稀(xi)相(xiang)(xiang)系統(tong)設計的(de)(de)(de)(de)(de)(de)(de)(de)(de)相(xiang)(xiang)對簡單性(xing)(xing)，它們(men)同時(shi)(shi)也被(bei)(bei)(bei)(bei)頻繁的(de)(de)(de)(de)(de)(de)(de)(de)(de)應用(yong)在(zai)(zai)工業領(ling)域。輸(shu)(shu)送(song)(song)(song)氣(qi)(qi)體的(de)(de)(de)(de)(de)(de)(de)(de)(de)速(su)(su)(su)度(du)減(jian)少到比保持粒(li)子懸(xuan)(xuan)浮(fu)狀態(tai)的(de)(de)(de)(de)(de)(de)(de)(de)(de)臨(lin)界值更小時(shi)(shi)，導致(zhi)物(wu)料(liao)(liao)(liao)在(zai)(zai)輸(shu)(shu)送(song)(song)(song)管道(dao)(dao)(dao)的(de)(de)(de)(de)(de)(de)(de)(de)(de)橫截(jie)面(mian)(mian)形成不(bu)均(jun)勻的(de)(de)(de)(de)(de)(de)(de)(de)(de)分(fen)布。臨(lin)界氣(qi)(qi)體速(su)(su)(su)度(du)被(bei)(bei)(bei)(bei)稱為(wei)是(shi)(shi)(shi)(shi)水(shui)平輸(shu)(shu)送(song)(song)(song)的(de)(de)(de)(de)(de)(de)(de)(de)(de)跳躍速(su)(su)(su)度(du)，垂直輸(shu)(shu)送(song)(song)(song)時(shi)(shi)堵塞。當水(shui)平管道(dao)(dao)(dao)中的(de)(de)(de)(de)(de)(de)(de)(de)(de)物(wu)料(liao)(liao)(liao)表面(mian)(mian)氣(qi)(qi)體速(su)(su)(su)度(du)低(di)于突變速(su)(su)(su)度(du)時(shi)(shi)，輸(shu)(shu)送(song)(song)(song)將會(hui)(hui)以(yi)低(di)流(liu)(liu)(liu)量(liang)通(tong)(tong)(tong)過管道(dao)(dao)(dao)橫截(jie)面(mian)(mian)的(de)(de)(de)(de)(de)(de)(de)(de)(de)上部，在(zai)(zai)管道(dao)(dao)(dao)的(de)(de)(de)(de)(de)(de)(de)(de)(de)剩余部分(fen)以(yi)高濃度(du)低(di)速(su)(su)(su)度(du)的(de)(de)(de)(de)(de)(de)(de)(de)(de)形式(shi)(shi)填充。有時(shi)(shi)沿管道(dao)(dao)(dao)的(de)(de)(de)(de)(de)(de)(de)(de)(de)橫截(jie)面(mian)(mian)會(hui)(hui)被(bei)(bei)(bei)(bei)填滿，而(er)有時(shi)(shi)只是(shi)(shi)(shi)(shi)部分(fen)被(bei)(bei)(bei)(bei)填滿.

實際應用中, 按照氣力(li)(li)驅動(dong)形式(shi)可以(yi)分(fen)(fen)為(wei)負(fu)壓(ya)和(he)正壓(ya)氣力(li)(li)輸(shu)(shu)(shu)送(song)(song), 在這兩種輸(shu)(shu)(shu)送(song)(song)系(xi)(xi)統中, 根(gen)據流動(dong)狀態(tai)圖再區(qu)分(fen)(fen)分(fen)(fen)為(wei)稀相, 密相和(he)流化(hua)態(tai)輸(shu)(shu)(shu)送(song)(song)系(xi)(xi)統. 除此之(zhi)外,根(gen)據喂料不同分(fen)(fen)為(wei)連續和(he)批(pi)次(ci)輸(shu)(shu)(shu)送(song)(song). 在高壓(ya)密相輸(shu)(shu)(shu)送(song)(song)技(ji)術(shu)中常(chang)采用批(pi)次(ci)的壓(ya)力(li)(li)罐進行高壓(ya)輸(shu)(shu)(shu)送(song)(song), 同時, 可以(yi)組合(he)兩個壓(ya)力(li)(li)罐設計達到連續的輸(shu)(shu)(shu)送(song)(song).

密(mi)相氣力輸送特點(dian):

● 用(yong)氣(qi)量小, 節能

● 無殘留輸送

● 不(bu)堵塞, 運(yun)行可靠

● 維護費用低

● 適合(he)于各類粉粒物料

● 壓力至0. 6m p a可調

● 適合(he)于(yu)柔性化自(zi)動生產中的物料高(gao)效輸送