密(mi)相氣力(li)輸(shu)送系列(lie)

氣力輸送原理

氣(qi)(qi)(qi)力(li)輸(shu)(shu)(shu)送(song)(song)(song)系統可分(fen)類為(wei)(wei)不同(tong)(tong)的(de)(de)(de)流(liu)(liu)動型(xing)(xing)式(shi)(shi)，其中(zhong)兩(liang)種主要型(xing)(xing)式(shi)(shi)是(shi)：(a) 稀(xi)(xi)相(xiang)輸(shu)(shu)(shu)送(song)(song)(song)和（b）密相(xiang)輸(shu)(shu)(shu)送(song)(song)(song)每種流(liu)(liu)動型(xing)(xing)式(shi)(shi)可按(an)物(wu)料與空(kong)氣(qi)(qi)(qi)的(de)(de)(de)流(liu)(liu)量(liang)比(bi)率(lv)大(da)小(xiao)(xiao)分(fen)類，其比(bi)率(lv)也被(bei)(bei)(bei)稱為(wei)(wei)“固氣(qi)(qi)(qi)比(bi)”： μ=ms/mf (1)許多稀(xi)(xi)相(xiang)的(de)(de)(de)運行范(fan)圍(wei)為(wei)(wei)0＜μ＜15，而密相(xiang)通(tong)常(chang)是(shi)μ＞15。圖(tu)(tu)1所示的(de)(de)(de)是(shi)典(dian)型(xing)(xing)輸(shu)(shu)(shu)送(song)(song)(song)狀態(tai)圖(tu)(tu)。稀(xi)(xi)相(xiang)輸(shu)(shu)(shu)送(song)(song)(song)可以(yi)(yi)(yi)被(bei)(bei)(bei)認(ren)為(wei)(wei)是(shi)一種完全的(de)(de)(de)懸浮(fu)流(liu)(liu)，而密相(xiang)輸(shu)(shu)(shu)送(song)(song)(song)通(tong)常(chang)被(bei)(bei)(bei)認(ren)為(wei)(wei)是(shi)非(fei)(fei)懸浮(fu)流(liu)(liu)。然而，如圖(tu)(tu)1所示，許多不同(tong)(tong)種類的(de)(de)(de)密相(xiang)（非(fei)(fei)懸浮(fu)流(liu)(liu)）依靠散料的(de)(de)(de)料性和流(liu)(liu)動性存(cun)在(zai)。密相(xiang)輸(shu)(shu)(shu)送(song)(song)(song)同(tong)(tong)樣也能被(bei)(bei)(bei)定義為(wei)(wei)輸(shu)(shu)(shu)送(song)(song)(song)物(wu)料完全填(tian)(tian)滿(man)管(guan)道(dao)截(jie)面的(de)(de)(de)一種輸(shu)(shu)(shu)送(song)(song)(song)方(fang)式(shi)(shi)。稀(xi)(xi)相(xiang)輸(shu)(shu)(shu)送(song)(song)(song)通(tong)常(chang)需要使用(yong)大(da)量(liang)的(de)(de)(de)高(gao)速(su)(su)氣(qi)(qi)(qi)體。氣(qi)(qi)(qi)流(liu)(liu)依靠升(sheng)力(li)和推動力(li)以(yi)(yi)(yi)離散粒子(zi)的(de)(de)(de)形式(shi)(shi)攜帶著(zhu)物(wu)料。參考(kao)圖(tu)(tu)1中(zhong)所述的(de)(de)(de)“懸浮(fu)流(liu)(liu)”，稀(xi)(xi)相(xiang)系統通(tong)常(chang)是(shi)最為(wei)(wei)被(bei)(bei)(bei)廣泛應用(yong)的(de)(de)(de)氣(qi)(qi)(qi)力(li)輸(shu)(shu)(shu)送(song)(song)(song)系統。由于稀(xi)(xi)相(xiang)系統設計的(de)(de)(de)相(xiang)對簡單性，它們同(tong)(tong)時也被(bei)(bei)(bei)頻繁(fan)的(de)(de)(de)應用(yong)在(zai)工業(ye)領域。輸(shu)(shu)(shu)送(song)(song)(song)氣(qi)(qi)(qi)體的(de)(de)(de)速(su)(su)度減(jian)少到比(bi)保持粒子(zi)懸浮(fu)狀態(tai)的(de)(de)(de)臨(lin)界值更小(xiao)(xiao)時，導(dao)致物(wu)料在(zai)輸(shu)(shu)(shu)送(song)(song)(song)管(guan)道(dao)的(de)(de)(de)橫(heng)截(jie)面形成不均(jun)勻的(de)(de)(de)分(fen)布。臨(lin)界氣(qi)(qi)(qi)體速(su)(su)度被(bei)(bei)(bei)稱為(wei)(wei)是(shi)水平輸(shu)(shu)(shu)送(song)(song)(song)的(de)(de)(de)跳躍(yue)速(su)(su)度，垂直輸(shu)(shu)(shu)送(song)(song)(song)時堵塞。當水平管(guan)道(dao)中(zhong)的(de)(de)(de)物(wu)料表面氣(qi)(qi)(qi)體速(su)(su)度低于突變速(su)(su)度時，輸(shu)(shu)(shu)送(song)(song)(song)將(jiang)會以(yi)(yi)(yi)低流(liu)(liu)量(liang)通(tong)過管(guan)道(dao)橫(heng)截(jie)面的(de)(de)(de)上部(bu)，在(zai)管(guan)道(dao)的(de)(de)(de)剩余(yu)部(bu)分(fen)以(yi)(yi)(yi)高(gao)濃度低速(su)(su)度的(de)(de)(de)形式(shi)(shi)填(tian)(tian)充。有(you)時沿管(guan)道(dao)的(de)(de)(de)橫(heng)截(jie)面會被(bei)(bei)(bei)填(tian)(tian)滿(man)，而有(you)時只是(shi)部(bu)分(fen)被(bei)(bei)(bei)填(tian)(tian)滿(man).

實際應用(yong)中, 按照氣力(li)(li)驅動形式(shi)可以分(fen)為(wei)負(fu)壓和正壓氣力(li)(li)輸送(song), 在這兩種輸送(song)系統中, 根(gen)據流(liu)動狀態(tai)圖再(zai)區(qu)分(fen)分(fen)為(wei)稀相, 密(mi)相和流(liu)化態(tai)輸送(song)系統. 除此之外,根(gen)據喂料不同分(fen)為(wei)連續(xu)和批次輸送(song). 在高(gao)壓密(mi)相輸送(song)技術中常采(cai)用(yong)批次的壓力(li)(li)罐(guan)進行高(gao)壓輸送(song), 同時, 可以組合(he)兩個壓力(li)(li)罐(guan)設計達到(dao)連續(xu)的輸送(song).

密相氣(qi)力(li)輸送特點(dian):

● 用氣量小, 節能

● 無(wu)殘留輸(shu)送(song)

● 不堵塞, 運行可靠

● 維護費用低(di)

● 適合于各類粉粒物料

● 壓力至(zhi)0. 6m p a可(ke)調

● 適合于柔(rou)性化自動生(sheng)產中(zhong)的物(wu)料(liao)高效輸送