密(mi)相氣力輸送(song)系列

氣力輸送(song)原理

氣(qi)(qi)力輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)系(xi)統(tong)(tong)(tong)可分(fen)類為(wei)不(bu)同(tong)的(de)(de)流(liu)(liu)動(dong)型式(shi)(shi)，其(qi)中(zhong)兩種主要型式(shi)(shi)是(shi)(shi)：(a) 稀(xi)相(xiang)輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)和(he)(he)（b）密(mi)(mi)相(xiang)輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)每種流(liu)(liu)動(dong)型式(shi)(shi)可按物(wu)料(liao)(liao)(liao)(liao)與(yu)空氣(qi)(qi)的(de)(de)流(liu)(liu)量比率大(da)小(xiao)分(fen)類，其(qi)比率也被(bei)(bei)(bei)稱為(wei)“固氣(qi)(qi)比”： μ=ms/mf (1)許多稀(xi)相(xiang)的(de)(de)運行范圍為(wei)0＜μ＜15，而(er)密(mi)(mi)相(xiang)通(tong)(tong)常(chang)是(shi)(shi)μ＞15。圖(tu)(tu)1所示的(de)(de)是(shi)(shi)典型輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)狀態圖(tu)(tu)。稀(xi)相(xiang)輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)可以被(bei)(bei)(bei)認為(wei)是(shi)(shi)一種完全的(de)(de)懸(xuan)(xuan)浮(fu)流(liu)(liu)，而(er)密(mi)(mi)相(xiang)輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)通(tong)(tong)常(chang)被(bei)(bei)(bei)認為(wei)是(shi)(shi)非懸(xuan)(xuan)浮(fu)流(liu)(liu)。然而(er)，如圖(tu)(tu)1所示，許多不(bu)同(tong)種類的(de)(de)密(mi)(mi)相(xiang)（非懸(xuan)(xuan)浮(fu)流(liu)(liu)）依靠散料(liao)(liao)(liao)(liao)的(de)(de)料(liao)(liao)(liao)(liao)性(xing)和(he)(he)流(liu)(liu)動(dong)性(xing)存在(zai)。密(mi)(mi)相(xiang)輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)同(tong)樣也能被(bei)(bei)(bei)定義為(wei)輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)物(wu)料(liao)(liao)(liao)(liao)完全填(tian)滿(man)管(guan)(guan)道截(jie)(jie)面(mian)的(de)(de)一種輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)方式(shi)(shi)。稀(xi)相(xiang)輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)通(tong)(tong)常(chang)需要使用大(da)量的(de)(de)高速(su)氣(qi)(qi)體(ti)。氣(qi)(qi)流(liu)(liu)依靠升力和(he)(he)推動(dong)力以離散粒(li)子(zi)的(de)(de)形式(shi)(shi)攜帶著物(wu)料(liao)(liao)(liao)(liao)。參考圖(tu)(tu)1中(zhong)所述的(de)(de)“懸(xuan)(xuan)浮(fu)流(liu)(liu)”，稀(xi)相(xiang)系(xi)統(tong)(tong)(tong)通(tong)(tong)常(chang)是(shi)(shi)最(zui)為(wei)被(bei)(bei)(bei)廣泛應(ying)用的(de)(de)氣(qi)(qi)力輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)系(xi)統(tong)(tong)(tong)。由于稀(xi)相(xiang)系(xi)統(tong)(tong)(tong)設計的(de)(de)相(xiang)對簡單性(xing)，它們同(tong)時(shi)也被(bei)(bei)(bei)頻(pin)繁的(de)(de)應(ying)用在(zai)工業領域(yu)。輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)氣(qi)(qi)體(ti)的(de)(de)速(su)度(du)減(jian)少到比保持粒(li)子(zi)懸(xuan)(xuan)浮(fu)狀態的(de)(de)臨(lin)界值(zhi)更小(xiao)時(shi)，導致物(wu)料(liao)(liao)(liao)(liao)在(zai)輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)管(guan)(guan)道的(de)(de)橫(heng)截(jie)(jie)面(mian)形成不(bu)均(jun)勻的(de)(de)分(fen)布。臨(lin)界氣(qi)(qi)體(ti)速(su)度(du)被(bei)(bei)(bei)稱為(wei)是(shi)(shi)水(shui)平(ping)輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)的(de)(de)跳躍速(su)度(du)，垂直輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)時(shi)堵塞。當水(shui)平(ping)管(guan)(guan)道中(zhong)的(de)(de)物(wu)料(liao)(liao)(liao)(liao)表面(mian)氣(qi)(qi)體(ti)速(su)度(du)低(di)于突變速(su)度(du)時(shi)，輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)將(jiang)會(hui)以低(di)流(liu)(liu)量通(tong)(tong)過管(guan)(guan)道橫(heng)截(jie)(jie)面(mian)的(de)(de)上部，在(zai)管(guan)(guan)道的(de)(de)剩(sheng)余部分(fen)以高濃(nong)度(du)低(di)速(su)度(du)的(de)(de)形式(shi)(shi)填(tian)充。有時(shi)沿管(guan)(guan)道的(de)(de)橫(heng)截(jie)(jie)面(mian)會(hui)被(bei)(bei)(bei)填(tian)滿(man)，而(er)有時(shi)只是(shi)(shi)部分(fen)被(bei)(bei)(bei)填(tian)滿(man).

實際應用(yong)(yong)中(zhong), 按(an)照氣力驅動形(xing)式可以(yi)分(fen)為負壓(ya)(ya)(ya)和正壓(ya)(ya)(ya)氣力輸(shu)(shu)送(song)(song)(song), 在(zai)這兩(liang)種輸(shu)(shu)送(song)(song)(song)系統(tong)中(zhong), 根(gen)據(ju)流動狀態圖再區分(fen)分(fen)為稀相(xiang), 密相(xiang)和流化態輸(shu)(shu)送(song)(song)(song)系統(tong). 除此(ci)之外,根(gen)據(ju)喂料不同分(fen)為連續和批次輸(shu)(shu)送(song)(song)(song). 在(zai)高壓(ya)(ya)(ya)密相(xiang)輸(shu)(shu)送(song)(song)(song)技術中(zhong)常采(cai)用(yong)(yong)批次的壓(ya)(ya)(ya)力罐進行高壓(ya)(ya)(ya)輸(shu)(shu)送(song)(song)(song), 同時, 可以(yi)組合(he)兩(liang)個壓(ya)(ya)(ya)力罐設計達到(dao)連續的輸(shu)(shu)送(song)(song)(song).

密相氣(qi)力(li)輸送特點:

● 用氣量小, 節能

● 無殘留輸送

● 不堵塞, 運行可靠

● 維護費用低(di)

● 適(shi)合于(yu)各類粉粒物料

● 壓(ya)力至0. 6m p a可調

● 適合于柔性(xing)化自動生產中的物料高效輸送