密(mi)相氣力(li)輸送系列

氣力輸送原理

氣(qi)(qi)(qi)力輸(shu)(shu)(shu)送(song)(song)系(xi)統(tong)可(ke)分(fen)(fen)(fen)類為(wei)不同(tong)的(de)(de)流(liu)(liu)(liu)動(dong)型(xing)式(shi)，其(qi)中(zhong)兩種(zhong)主要型(xing)式(shi)是：(a) 稀(xi)(xi)相(xiang)(xiang)(xiang)輸(shu)(shu)(shu)送(song)(song)和（b）密相(xiang)(xiang)(xiang)輸(shu)(shu)(shu)送(song)(song)每(mei)種(zhong)流(liu)(liu)(liu)動(dong)型(xing)式(shi)可(ke)按物(wu)料與(yu)空氣(qi)(qi)(qi)的(de)(de)流(liu)(liu)(liu)量比(bi)率(lv)大小(xiao)(xiao)分(fen)(fen)(fen)類，其(qi)比(bi)率(lv)也被(bei)(bei)稱為(wei)“固(gu)氣(qi)(qi)(qi)比(bi)”： μ=ms/mf (1)許多(duo)稀(xi)(xi)相(xiang)(xiang)(xiang)的(de)(de)運行范圍(wei)為(wei)0＜μ＜15，而密相(xiang)(xiang)(xiang)通(tong)(tong)(tong)(tong)常是μ＞15。圖(tu)(tu)1所(suo)示(shi)的(de)(de)是典型(xing)輸(shu)(shu)(shu)送(song)(song)狀(zhuang)態圖(tu)(tu)。稀(xi)(xi)相(xiang)(xiang)(xiang)輸(shu)(shu)(shu)送(song)(song)可(ke)以被(bei)(bei)認為(wei)是一種(zhong)完(wan)全的(de)(de)懸(xuan)浮(fu)(fu)流(liu)(liu)(liu)，而密相(xiang)(xiang)(xiang)輸(shu)(shu)(shu)送(song)(song)通(tong)(tong)(tong)(tong)常被(bei)(bei)認為(wei)是非(fei)懸(xuan)浮(fu)(fu)流(liu)(liu)(liu)。然而，如圖(tu)(tu)1所(suo)示(shi)，許多(duo)不同(tong)種(zhong)類的(de)(de)密相(xiang)(xiang)(xiang)（非(fei)懸(xuan)浮(fu)(fu)流(liu)(liu)(liu)）依靠(kao)(kao)散(san)(san)料的(de)(de)料性和流(liu)(liu)(liu)動(dong)性存在。密相(xiang)(xiang)(xiang)輸(shu)(shu)(shu)送(song)(song)同(tong)樣也能被(bei)(bei)定(ding)義為(wei)輸(shu)(shu)(shu)送(song)(song)物(wu)料完(wan)全填(tian)滿管(guan)道截(jie)面的(de)(de)一種(zhong)輸(shu)(shu)(shu)送(song)(song)方式(shi)。稀(xi)(xi)相(xiang)(xiang)(xiang)輸(shu)(shu)(shu)送(song)(song)通(tong)(tong)(tong)(tong)常需要使(shi)用(yong)(yong)大量的(de)(de)高速(su)(su)氣(qi)(qi)(qi)體。氣(qi)(qi)(qi)流(liu)(liu)(liu)依靠(kao)(kao)升力和推動(dong)力以離(li)散(san)(san)粒(li)子(zi)的(de)(de)形(xing)式(shi)攜帶著物(wu)料。參(can)考圖(tu)(tu)1中(zhong)所(suo)述的(de)(de)“懸(xuan)浮(fu)(fu)流(liu)(liu)(liu)”，稀(xi)(xi)相(xiang)(xiang)(xiang)系(xi)統(tong)通(tong)(tong)(tong)(tong)常是最(zui)為(wei)被(bei)(bei)廣(guang)泛應用(yong)(yong)的(de)(de)氣(qi)(qi)(qi)力輸(shu)(shu)(shu)送(song)(song)系(xi)統(tong)。由(you)于稀(xi)(xi)相(xiang)(xiang)(xiang)系(xi)統(tong)設計的(de)(de)相(xiang)(xiang)(xiang)對簡單性，它們同(tong)時也被(bei)(bei)頻繁的(de)(de)應用(yong)(yong)在工(gong)業領域。輸(shu)(shu)(shu)送(song)(song)氣(qi)(qi)(qi)體的(de)(de)速(su)(su)度減少到比(bi)保(bao)持(chi)粒(li)子(zi)懸(xuan)浮(fu)(fu)狀(zhuang)態的(de)(de)臨(lin)界值更小(xiao)(xiao)時，導致物(wu)料在輸(shu)(shu)(shu)送(song)(song)管(guan)道的(de)(de)橫(heng)截(jie)面形(xing)成不均勻的(de)(de)分(fen)(fen)(fen)布。臨(lin)界氣(qi)(qi)(qi)體速(su)(su)度被(bei)(bei)稱為(wei)是水平輸(shu)(shu)(shu)送(song)(song)的(de)(de)跳(tiao)躍速(su)(su)度，垂直輸(shu)(shu)(shu)送(song)(song)時堵塞。當水平管(guan)道中(zhong)的(de)(de)物(wu)料表(biao)面氣(qi)(qi)(qi)體速(su)(su)度低(di)(di)(di)于突變(bian)速(su)(su)度時，輸(shu)(shu)(shu)送(song)(song)將會以低(di)(di)(di)流(liu)(liu)(liu)量通(tong)(tong)(tong)(tong)過管(guan)道橫(heng)截(jie)面的(de)(de)上部，在管(guan)道的(de)(de)剩余(yu)部分(fen)(fen)(fen)以高濃(nong)度低(di)(di)(di)速(su)(su)度的(de)(de)形(xing)式(shi)填(tian)充。有時沿管(guan)道的(de)(de)橫(heng)截(jie)面會被(bei)(bei)填(tian)滿，而有時只(zhi)是部分(fen)(fen)(fen)被(bei)(bei)填(tian)滿.

實際應用中, 按(an)照氣力(li)驅動形(xing)式(shi)可(ke)以分為(wei)負壓和正壓氣力(li)輸(shu)(shu)送(song)(song), 在(zai)這兩種輸(shu)(shu)送(song)(song)系統(tong)中, 根據流(liu)(liu)動狀態圖(tu)再(zai)區(qu)分分為(wei)稀相(xiang), 密相(xiang)和流(liu)(liu)化態輸(shu)(shu)送(song)(song)系統(tong). 除此(ci)之外,根據喂料不同分為(wei)連(lian)續和批次輸(shu)(shu)送(song)(song). 在(zai)高壓密相(xiang)輸(shu)(shu)送(song)(song)技術(shu)中常(chang)采(cai)用批次的壓力(li)罐進行高壓輸(shu)(shu)送(song)(song), 同時, 可(ke)以組合兩個(ge)壓力(li)罐設計達到連(lian)續的輸(shu)(shu)送(song)(song).

密(mi)相(xiang)氣力輸送特點:

● 用氣量(liang)小(xiao), 節能

● 無(wu)殘(can)留輸(shu)送

● 不堵塞(sai), 運行(xing)可(ke)靠(kao)

● 維護(hu)費用低(di)

● 適合于各類粉粒物(wu)料(liao)

● 壓力至0. 6m p a可調

● 適合于柔性化自動(dong)生(sheng)產中的物料高效(xiao)輸送(song)