密相氣力輸(shu)送系列

氣力輸送原理

氣力輸(shu)(shu)送(song)(song)(song)(song)系統(tong)(tong)可分(fen)(fen)類(lei)為(wei)不(bu)同的(de)(de)(de)(de)(de)流(liu)(liu)(liu)動型(xing)式(shi)，其中兩種(zhong)主(zhu)要型(xing)式(shi)是(shi)：(a) 稀相(xiang)(xiang)輸(shu)(shu)送(song)(song)(song)(song)和（b）密(mi)相(xiang)(xiang)輸(shu)(shu)送(song)(song)(song)(song)每種(zhong)流(liu)(liu)(liu)動型(xing)式(shi)可按物料(liao)(liao)與(yu)空氣的(de)(de)(de)(de)(de)流(liu)(liu)(liu)量(liang)(liang)比(bi)(bi)率大小分(fen)(fen)類(lei)，其比(bi)(bi)率也被(bei)(bei)(bei)稱為(wei)“固氣比(bi)(bi)”： μ=ms/mf (1)許(xu)多稀相(xiang)(xiang)的(de)(de)(de)(de)(de)運行范(fan)圍為(wei)0＜μ＜15，而(er)(er)密(mi)相(xiang)(xiang)通常(chang)是(shi)μ＞15。圖(tu)1所(suo)示(shi)的(de)(de)(de)(de)(de)是(shi)典型(xing)輸(shu)(shu)送(song)(song)(song)(song)狀態圖(tu)。稀相(xiang)(xiang)輸(shu)(shu)送(song)(song)(song)(song)可以(yi)被(bei)(bei)(bei)認(ren)為(wei)是(shi)一種(zhong)完(wan)全的(de)(de)(de)(de)(de)懸(xuan)(xuan)浮(fu)(fu)流(liu)(liu)(liu)，而(er)(er)密(mi)相(xiang)(xiang)輸(shu)(shu)送(song)(song)(song)(song)通常(chang)被(bei)(bei)(bei)認(ren)為(wei)是(shi)非(fei)懸(xuan)(xuan)浮(fu)(fu)流(liu)(liu)(liu)。然(ran)而(er)(er)，如圖(tu)1所(suo)示(shi)，許(xu)多不(bu)同種(zhong)類(lei)的(de)(de)(de)(de)(de)密(mi)相(xiang)(xiang)（非(fei)懸(xuan)(xuan)浮(fu)(fu)流(liu)(liu)(liu)）依靠(kao)散料(liao)(liao)的(de)(de)(de)(de)(de)料(liao)(liao)性(xing)和流(liu)(liu)(liu)動性(xing)存在。密(mi)相(xiang)(xiang)輸(shu)(shu)送(song)(song)(song)(song)同樣也能(neng)被(bei)(bei)(bei)定義(yi)為(wei)輸(shu)(shu)送(song)(song)(song)(song)物料(liao)(liao)完(wan)全填滿管道(dao)截(jie)(jie)面(mian)的(de)(de)(de)(de)(de)一種(zhong)輸(shu)(shu)送(song)(song)(song)(song)方(fang)式(shi)。稀相(xiang)(xiang)輸(shu)(shu)送(song)(song)(song)(song)通常(chang)需(xu)要使用(yong)(yong)大量(liang)(liang)的(de)(de)(de)(de)(de)高速氣體。氣流(liu)(liu)(liu)依靠(kao)升力和推(tui)動力以(yi)離散粒(li)子的(de)(de)(de)(de)(de)形式(shi)攜帶著(zhu)物料(liao)(liao)。參考圖(tu)1中所(suo)述的(de)(de)(de)(de)(de)“懸(xuan)(xuan)浮(fu)(fu)流(liu)(liu)(liu)”，稀相(xiang)(xiang)系統(tong)(tong)通常(chang)是(shi)最為(wei)被(bei)(bei)(bei)廣泛(fan)應(ying)用(yong)(yong)的(de)(de)(de)(de)(de)氣力輸(shu)(shu)送(song)(song)(song)(song)系統(tong)(tong)。由(you)于稀相(xiang)(xiang)系統(tong)(tong)設(she)計(ji)的(de)(de)(de)(de)(de)相(xiang)(xiang)對簡單性(xing)，它們(men)同時(shi)(shi)(shi)也被(bei)(bei)(bei)頻繁的(de)(de)(de)(de)(de)應(ying)用(yong)(yong)在工業領域(yu)。輸(shu)(shu)送(song)(song)(song)(song)氣體的(de)(de)(de)(de)(de)速度(du)減少到比(bi)(bi)保持粒(li)子懸(xuan)(xuan)浮(fu)(fu)狀態的(de)(de)(de)(de)(de)臨(lin)界(jie)值更小時(shi)(shi)(shi)，導致物料(liao)(liao)在輸(shu)(shu)送(song)(song)(song)(song)管道(dao)的(de)(de)(de)(de)(de)橫截(jie)(jie)面(mian)形成不(bu)均(jun)勻的(de)(de)(de)(de)(de)分(fen)(fen)布。臨(lin)界(jie)氣體速度(du)被(bei)(bei)(bei)稱為(wei)是(shi)水(shui)平(ping)輸(shu)(shu)送(song)(song)(song)(song)的(de)(de)(de)(de)(de)跳躍速度(du)，垂直輸(shu)(shu)送(song)(song)(song)(song)時(shi)(shi)(shi)堵塞。當水(shui)平(ping)管道(dao)中的(de)(de)(de)(de)(de)物料(liao)(liao)表面(mian)氣體速度(du)低于突變速度(du)時(shi)(shi)(shi)，輸(shu)(shu)送(song)(song)(song)(song)將會(hui)以(yi)低流(liu)(liu)(liu)量(liang)(liang)通過管道(dao)橫截(jie)(jie)面(mian)的(de)(de)(de)(de)(de)上部，在管道(dao)的(de)(de)(de)(de)(de)剩余部分(fen)(fen)以(yi)高濃度(du)低速度(du)的(de)(de)(de)(de)(de)形式(shi)填充。有時(shi)(shi)(shi)沿管道(dao)的(de)(de)(de)(de)(de)橫截(jie)(jie)面(mian)會(hui)被(bei)(bei)(bei)填滿，而(er)(er)有時(shi)(shi)(shi)只是(shi)部分(fen)(fen)被(bei)(bei)(bei)填滿.

實際(ji)應用(yong)中(zhong), 按照氣力(li)(li)驅動形式可以分(fen)為負壓和正(zheng)壓氣力(li)(li)輸(shu)送(song)(song), 在(zai)這兩(liang)種輸(shu)送(song)(song)系(xi)統中(zhong), 根(gen)據(ju)流動狀(zhuang)態(tai)圖再區(qu)分(fen)分(fen)為稀相, 密相和流化態(tai)輸(shu)送(song)(song)系(xi)統. 除此之外,根(gen)據(ju)喂料不同(tong)分(fen)為連續和批次輸(shu)送(song)(song). 在(zai)高壓密相輸(shu)送(song)(song)技術中(zhong)常采用(yong)批次的壓力(li)(li)罐進行高壓輸(shu)送(song)(song), 同(tong)時(shi), 可以組(zu)合(he)兩(liang)個壓力(li)(li)罐設計達到連續的輸(shu)送(song)(song).

密相氣力(li)輸送(song)特點(dian):

● 用(yong)氣量小, 節能

● 無殘(can)留輸(shu)送(song)

● 不堵塞, 運行可靠(kao)

● 維護(hu)費用低

● 適合于(yu)各類粉粒物(wu)料(liao)

● 壓力(li)至0. 6m p a可調

● 適合于柔性(xing)化自(zi)動生產中的物(wu)料高(gao)效輸(shu)送(song)