密相氣力輸送系列

氣力輸送原(yuan)理

氣力輸(shu)送(song)(song)(song)(song)(song)系統可分(fen)類(lei)為(wei)(wei)(wei)不(bu)同的(de)(de)(de)(de)(de)(de)流(liu)(liu)動(dong)(dong)型(xing)(xing)式(shi)(shi)，其中兩種(zhong)主(zhu)要(yao)(yao)型(xing)(xing)式(shi)(shi)是(shi)：(a) 稀(xi)相(xiang)輸(shu)送(song)(song)(song)(song)(song)和(he)（b）密相(xiang)輸(shu)送(song)(song)(song)(song)(song)每種(zhong)流(liu)(liu)動(dong)(dong)型(xing)(xing)式(shi)(shi)可按(an)物(wu)料與空氣的(de)(de)(de)(de)(de)(de)流(liu)(liu)量(liang)(liang)比(bi)率(lv)大(da)小(xiao)分(fen)類(lei)，其比(bi)率(lv)也被(bei)(bei)(bei)稱為(wei)(wei)(wei)“固氣比(bi)”： μ=ms/mf (1)許多稀(xi)相(xiang)的(de)(de)(de)(de)(de)(de)運行范(fan)圍為(wei)(wei)(wei)0＜μ＜15，而密相(xiang)通(tong)常(chang)是(shi)μ＞15。圖1所(suo)示的(de)(de)(de)(de)(de)(de)是(shi)典型(xing)(xing)輸(shu)送(song)(song)(song)(song)(song)狀態圖。稀(xi)相(xiang)輸(shu)送(song)(song)(song)(song)(song)可以(yi)被(bei)(bei)(bei)認為(wei)(wei)(wei)是(shi)一種(zhong)完全(quan)的(de)(de)(de)(de)(de)(de)懸浮(fu)流(liu)(liu)，而密相(xiang)輸(shu)送(song)(song)(song)(song)(song)通(tong)常(chang)被(bei)(bei)(bei)認為(wei)(wei)(wei)是(shi)非懸浮(fu)流(liu)(liu)。然(ran)而，如圖1所(suo)示，許多不(bu)同種(zhong)類(lei)的(de)(de)(de)(de)(de)(de)密相(xiang)（非懸浮(fu)流(liu)(liu)）依靠散料的(de)(de)(de)(de)(de)(de)料性和(he)流(liu)(liu)動(dong)(dong)性存(cun)在(zai)。密相(xiang)輸(shu)送(song)(song)(song)(song)(song)同樣也能被(bei)(bei)(bei)定義為(wei)(wei)(wei)輸(shu)送(song)(song)(song)(song)(song)物(wu)料完全(quan)填滿(man)管(guan)(guan)道(dao)(dao)截(jie)面(mian)的(de)(de)(de)(de)(de)(de)一種(zhong)輸(shu)送(song)(song)(song)(song)(song)方式(shi)(shi)。稀(xi)相(xiang)輸(shu)送(song)(song)(song)(song)(song)通(tong)常(chang)需要(yao)(yao)使用(yong)大(da)量(liang)(liang)的(de)(de)(de)(de)(de)(de)高速氣體(ti)。氣流(liu)(liu)依靠升力和(he)推動(dong)(dong)力以(yi)離(li)散粒子的(de)(de)(de)(de)(de)(de)形式(shi)(shi)攜帶(dai)著物(wu)料。參考(kao)圖1中所(suo)述的(de)(de)(de)(de)(de)(de)“懸浮(fu)流(liu)(liu)”，稀(xi)相(xiang)系統通(tong)常(chang)是(shi)最為(wei)(wei)(wei)被(bei)(bei)(bei)廣泛應(ying)用(yong)的(de)(de)(de)(de)(de)(de)氣力輸(shu)送(song)(song)(song)(song)(song)系統。由(you)于稀(xi)相(xiang)系統設(she)計的(de)(de)(de)(de)(de)(de)相(xiang)對簡(jian)單(dan)性，它們同時(shi)也被(bei)(bei)(bei)頻繁的(de)(de)(de)(de)(de)(de)應(ying)用(yong)在(zai)工業(ye)領域。輸(shu)送(song)(song)(song)(song)(song)氣體(ti)的(de)(de)(de)(de)(de)(de)速度減(jian)少(shao)到比(bi)保持粒子懸浮(fu)狀態的(de)(de)(de)(de)(de)(de)臨界(jie)值更小(xiao)時(shi)，導致物(wu)料在(zai)輸(shu)送(song)(song)(song)(song)(song)管(guan)(guan)道(dao)(dao)的(de)(de)(de)(de)(de)(de)橫(heng)截(jie)面(mian)形成不(bu)均勻的(de)(de)(de)(de)(de)(de)分(fen)布(bu)。臨界(jie)氣體(ti)速度被(bei)(bei)(bei)稱為(wei)(wei)(wei)是(shi)水(shui)平(ping)輸(shu)送(song)(song)(song)(song)(song)的(de)(de)(de)(de)(de)(de)跳(tiao)躍(yue)速度，垂直輸(shu)送(song)(song)(song)(song)(song)時(shi)堵塞(sai)。當水(shui)平(ping)管(guan)(guan)道(dao)(dao)中的(de)(de)(de)(de)(de)(de)物(wu)料表面(mian)氣體(ti)速度低(di)于突變速度時(shi)，輸(shu)送(song)(song)(song)(song)(song)將會以(yi)低(di)流(liu)(liu)量(liang)(liang)通(tong)過(guo)管(guan)(guan)道(dao)(dao)橫(heng)截(jie)面(mian)的(de)(de)(de)(de)(de)(de)上(shang)部，在(zai)管(guan)(guan)道(dao)(dao)的(de)(de)(de)(de)(de)(de)剩余部分(fen)以(yi)高濃(nong)度低(di)速度的(de)(de)(de)(de)(de)(de)形式(shi)(shi)填充。有時(shi)沿管(guan)(guan)道(dao)(dao)的(de)(de)(de)(de)(de)(de)橫(heng)截(jie)面(mian)會被(bei)(bei)(bei)填滿(man)，而有時(shi)只是(shi)部分(fen)被(bei)(bei)(bei)填滿(man).

實際應(ying)用(yong)(yong)中(zhong), 按照氣力(li)驅動形(xing)式可以分為負(fu)壓(ya)(ya)(ya)和正壓(ya)(ya)(ya)氣力(li)輸(shu)(shu)(shu)送(song)(song), 在這兩種輸(shu)(shu)(shu)送(song)(song)系統中(zhong), 根據(ju)流(liu)動狀態圖再區分分為稀相, 密(mi)(mi)相和流(liu)化(hua)態輸(shu)(shu)(shu)送(song)(song)系統. 除此之外,根據(ju)喂料不同(tong)分為連續和批次(ci)輸(shu)(shu)(shu)送(song)(song). 在高壓(ya)(ya)(ya)密(mi)(mi)相輸(shu)(shu)(shu)送(song)(song)技術中(zhong)常采用(yong)(yong)批次(ci)的(de)壓(ya)(ya)(ya)力(li)罐進(jin)行高壓(ya)(ya)(ya)輸(shu)(shu)(shu)送(song)(song), 同(tong)時, 可以組合(he)兩個壓(ya)(ya)(ya)力(li)罐設計達(da)到(dao)連續的(de)輸(shu)(shu)(shu)送(song)(song).

密相氣力輸送特(te)點:

● 用氣量(liang)小, 節能

● 無殘留輸送

● 不堵(du)塞, 運行(xing)可(ke)靠

● 維護費用低

● 適合于(yu)各類粉粒物(wu)料

● 壓力至0. 6m p a可調

● 適(shi)合于柔性化自動生產中的物料(liao)高效(xiao)輸送