密相(xiang)氣力(li)輸送系列

氣力(li)輸送原(yuan)理

氣力輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)系(xi)統(tong)(tong)(tong)可(ke)分(fen)(fen)類(lei)為(wei)(wei)不同(tong)的(de)(de)(de)(de)(de)流(liu)(liu)(liu)動(dong)(dong)型式(shi)(shi)，其(qi)(qi)中兩種(zhong)主(zhu)要(yao)型式(shi)(shi)是(shi)(shi)(shi)(shi)(shi)：(a) 稀(xi)相(xiang)(xiang)(xiang)(xiang)(xiang)輸(shu)(shu)(shu)(shu)送(song)(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)(song)每種(zhong)流(liu)(liu)(liu)動(dong)(dong)型式(shi)(shi)可(ke)按物(wu)料(liao)與(yu)空氣的(de)(de)(de)(de)(de)流(liu)(liu)(liu)量(liang)比率大小(xiao)(xiao)分(fen)(fen)類(lei)，其(qi)(qi)比率也被(bei)(bei)(bei)稱(cheng)為(wei)(wei)“固氣比”： μ=ms/mf (1)許(xu)多(duo)稀(xi)相(xiang)(xiang)(xiang)(xiang)(xiang)的(de)(de)(de)(de)(de)運(yun)行范圍為(wei)(wei)0＜μ＜15，而(er)(er)密相(xiang)(xiang)(xiang)(xiang)(xiang)通(tong)常(chang)是(shi)(shi)(shi)(shi)(shi)μ＞15。圖1所(suo)示的(de)(de)(de)(de)(de)是(shi)(shi)(shi)(shi)(shi)典型輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)狀態圖。稀(xi)相(xiang)(xiang)(xiang)(xiang)(xiang)輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)可(ke)以(yi)被(bei)(bei)(bei)認為(wei)(wei)是(shi)(shi)(shi)(shi)(shi)一(yi)(yi)種(zhong)完全的(de)(de)(de)(de)(de)懸(xuan)(xuan)浮流(liu)(liu)(liu)，而(er)(er)密相(xiang)(xiang)(xiang)(xiang)(xiang)輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)通(tong)常(chang)被(bei)(bei)(bei)認為(wei)(wei)是(shi)(shi)(shi)(shi)(shi)非懸(xuan)(xuan)浮流(liu)(liu)(liu)。然而(er)(er)，如(ru)圖1所(suo)示，許(xu)多(duo)不同(tong)種(zhong)類(lei)的(de)(de)(de)(de)(de)密相(xiang)(xiang)(xiang)(xiang)(xiang)（非懸(xuan)(xuan)浮流(liu)(liu)(liu)）依靠(kao)散料(liao)的(de)(de)(de)(de)(de)料(liao)性和流(liu)(liu)(liu)動(dong)(dong)性存在。密相(xiang)(xiang)(xiang)(xiang)(xiang)輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)同(tong)樣也能(neng)被(bei)(bei)(bei)定義為(wei)(wei)輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)物(wu)料(liao)完全填滿(man)(man)管(guan)(guan)道(dao)(dao)(dao)(dao)截(jie)面(mian)(mian)的(de)(de)(de)(de)(de)一(yi)(yi)種(zhong)輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)方式(shi)(shi)。稀(xi)相(xiang)(xiang)(xiang)(xiang)(xiang)輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)通(tong)常(chang)需(xu)要(yao)使用(yong)(yong)大量(liang)的(de)(de)(de)(de)(de)高(gao)速氣體。氣流(liu)(liu)(liu)依靠(kao)升(sheng)力和推動(dong)(dong)力以(yi)離(li)散粒子(zi)的(de)(de)(de)(de)(de)形式(shi)(shi)攜(xie)帶著物(wu)料(liao)。參考圖1中所(suo)述的(de)(de)(de)(de)(de)“懸(xuan)(xuan)浮流(liu)(liu)(liu)”，稀(xi)相(xiang)(xiang)(xiang)(xiang)(xiang)系(xi)統(tong)(tong)(tong)通(tong)常(chang)是(shi)(shi)(shi)(shi)(shi)最為(wei)(wei)被(bei)(bei)(bei)廣泛應(ying)用(yong)(yong)的(de)(de)(de)(de)(de)氣力輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)系(xi)統(tong)(tong)(tong)。由于稀(xi)相(xiang)(xiang)(xiang)(xiang)(xiang)系(xi)統(tong)(tong)(tong)設計的(de)(de)(de)(de)(de)相(xiang)(xiang)(xiang)(xiang)(xiang)對簡(jian)單性，它們同(tong)時(shi)也被(bei)(bei)(bei)頻繁的(de)(de)(de)(de)(de)應(ying)用(yong)(yong)在工業(ye)領域。輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)氣體的(de)(de)(de)(de)(de)速度(du)減(jian)少到比保持粒子(zi)懸(xuan)(xuan)浮狀態的(de)(de)(de)(de)(de)臨界值(zhi)更小(xiao)(xiao)時(shi)，導致物(wu)料(liao)在輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)管(guan)(guan)道(dao)(dao)(dao)(dao)的(de)(de)(de)(de)(de)橫截(jie)面(mian)(mian)形成不均勻的(de)(de)(de)(de)(de)分(fen)(fen)布。臨界氣體速度(du)被(bei)(bei)(bei)稱(cheng)為(wei)(wei)是(shi)(shi)(shi)(shi)(shi)水(shui)平輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)的(de)(de)(de)(de)(de)跳躍速度(du)，垂直輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)時(shi)堵塞。當水(shui)平管(guan)(guan)道(dao)(dao)(dao)(dao)中的(de)(de)(de)(de)(de)物(wu)料(liao)表(biao)面(mian)(mian)氣體速度(du)低于突變速度(du)時(shi)，輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)將會以(yi)低流(liu)(liu)(liu)量(liang)通(tong)過管(guan)(guan)道(dao)(dao)(dao)(dao)橫截(jie)面(mian)(mian)的(de)(de)(de)(de)(de)上部(bu)，在管(guan)(guan)道(dao)(dao)(dao)(dao)的(de)(de)(de)(de)(de)剩余部(bu)分(fen)(fen)以(yi)高(gao)濃(nong)度(du)低速度(du)的(de)(de)(de)(de)(de)形式(shi)(shi)填充。有(you)時(shi)沿管(guan)(guan)道(dao)(dao)(dao)(dao)的(de)(de)(de)(de)(de)橫截(jie)面(mian)(mian)會被(bei)(bei)(bei)填滿(man)(man)，而(er)(er)有(you)時(shi)只是(shi)(shi)(shi)(shi)(shi)部(bu)分(fen)(fen)被(bei)(bei)(bei)填滿(man)(man).

實際應用中(zhong)(zhong), 按(an)照氣力(li)驅動(dong)形式可(ke)(ke)以(yi)(yi)分(fen)為負壓和(he)正壓氣力(li)輸送(song), 在這兩(liang)種輸送(song)系統(tong)中(zhong)(zhong), 根據流(liu)動(dong)狀態圖再(zai)區分(fen)分(fen)為稀(xi)相, 密相和(he)流(liu)化態輸送(song)系統(tong). 除此(ci)之外,根據喂料不同分(fen)為連續和(he)批次(ci)(ci)輸送(song). 在高壓密相輸送(song)技(ji)術中(zhong)(zhong)常采用批次(ci)(ci)的(de)壓力(li)罐(guan)進(jin)行高壓輸送(song), 同時(shi), 可(ke)(ke)以(yi)(yi)組合(he)兩(liang)個壓力(li)罐(guan)設(she)計達到連續的(de)輸送(song).

密相氣力輸送特點:

● 用氣量小, 節能(neng)

● 無殘留(liu)輸(shu)送(song)

● 不堵塞(sai), 運行可靠

● 維護(hu)費用低(di)

● 適合于各類粉粒物料

● 壓力至0. 6m p a可調

● 適合于柔性化自動生產中的物料高效(xiao)輸送