密相氣(qi)力輸送系列
氣力輸(shu)送原理
氣(qi)(qi)力輸(shu)(shu)送(song)(song)(song)系統(tong)可分(fen)(fen)類(lei)(lei)為不(bu)同(tong)的(de)(de)(de)(de)(de)(de)流(liu)(liu)(liu)動(dong)型(xing)(xing)式(shi),其(qi)中兩種主要(yao)型(xing)(xing)式(shi)是(shi)(shi):(a) 稀相(xiang)(xiang)(xiang)(xiang)輸(shu)(shu)送(song)(song)(song)和(b)密相(xiang)(xiang)(xiang)(xiang)輸(shu)(shu)送(song)(song)(song)每種流(liu)(liu)(liu)動(dong)型(xing)(xing)式(shi)可按(an)物料與空氣(qi)(qi)的(de)(de)(de)(de)(de)(de)流(liu)(liu)(liu)量(liang)(liang)比率大小分(fen)(fen)類(lei)(lei),其(qi)比率也(ye)(ye)被(bei)稱為“固氣(qi)(qi)比”: μ=ms/mf (1)許多稀相(xiang)(xiang)(xiang)(xiang)的(de)(de)(de)(de)(de)(de)運行范圍為0<μ<15,而(er)密相(xiang)(xiang)(xiang)(xiang)通常(chang)(chang)是(shi)(shi)μ>15。圖1所(suo)示(shi)的(de)(de)(de)(de)(de)(de)是(shi)(shi)典型(xing)(xing)輸(shu)(shu)送(song)(song)(song)狀態(tai)圖。稀相(xiang)(xiang)(xiang)(xiang)輸(shu)(shu)送(song)(song)(song)可以(yi)被(bei)認(ren)為是(shi)(shi)一種完全的(de)(de)(de)(de)(de)(de)懸(xuan)浮(fu)流(liu)(liu)(liu),而(er)密相(xiang)(xiang)(xiang)(xiang)輸(shu)(shu)送(song)(song)(song)通常(chang)(chang)被(bei)認(ren)為是(shi)(shi)非(fei)懸(xuan)浮(fu)流(liu)(liu)(liu)。然而(er),如圖1所(suo)示(shi),許多不(bu)同(tong)種類(lei)(lei)的(de)(de)(de)(de)(de)(de)密相(xiang)(xiang)(xiang)(xiang)(非(fei)懸(xuan)浮(fu)流(liu)(liu)(liu))依靠(kao)(kao)散料的(de)(de)(de)(de)(de)(de)料性和流(liu)(liu)(liu)動(dong)性存在(zai)(zai)。密相(xiang)(xiang)(xiang)(xiang)輸(shu)(shu)送(song)(song)(song)同(tong)樣(yang)也(ye)(ye)能(neng)被(bei)定(ding)義為輸(shu)(shu)送(song)(song)(song)物料完全填(tian)滿(man)管(guan)(guan)(guan)道(dao)(dao)截(jie)面(mian)(mian)的(de)(de)(de)(de)(de)(de)一種輸(shu)(shu)送(song)(song)(song)方式(shi)。稀相(xiang)(xiang)(xiang)(xiang)輸(shu)(shu)送(song)(song)(song)通常(chang)(chang)需要(yao)使用(yong)大量(liang)(liang)的(de)(de)(de)(de)(de)(de)高(gao)速(su)氣(qi)(qi)體。氣(qi)(qi)流(liu)(liu)(liu)依靠(kao)(kao)升力和推動(dong)力以(yi)離散粒子(zi)的(de)(de)(de)(de)(de)(de)形式(shi)攜帶著(zhu)物料。參考圖1中所(suo)述的(de)(de)(de)(de)(de)(de)“懸(xuan)浮(fu)流(liu)(liu)(liu)”,稀相(xiang)(xiang)(xiang)(xiang)系統(tong)通常(chang)(chang)是(shi)(shi)最為被(bei)廣泛應(ying)用(yong)的(de)(de)(de)(de)(de)(de)氣(qi)(qi)力輸(shu)(shu)送(song)(song)(song)系統(tong)。由于稀相(xiang)(xiang)(xiang)(xiang)系統(tong)設(she)計(ji)的(de)(de)(de)(de)(de)(de)相(xiang)(xiang)(xiang)(xiang)對簡單性,它們同(tong)時(shi)也(ye)(ye)被(bei)頻繁的(de)(de)(de)(de)(de)(de)應(ying)用(yong)在(zai)(zai)工業(ye)領域。輸(shu)(shu)送(song)(song)(song)氣(qi)(qi)體的(de)(de)(de)(de)(de)(de)速(su)度(du)(du)減少(shao)到比保持粒子(zi)懸(xuan)浮(fu)狀態(tai)的(de)(de)(de)(de)(de)(de)臨(lin)界(jie)值更小時(shi),導致物料在(zai)(zai)輸(shu)(shu)送(song)(song)(song)管(guan)(guan)(guan)道(dao)(dao)的(de)(de)(de)(de)(de)(de)橫截(jie)面(mian)(mian)形成不(bu)均勻的(de)(de)(de)(de)(de)(de)分(fen)(fen)布。臨(lin)界(jie)氣(qi)(qi)體速(su)度(du)(du)被(bei)稱為是(shi)(shi)水平輸(shu)(shu)送(song)(song)(song)的(de)(de)(de)(de)(de)(de)跳躍速(su)度(du)(du),垂直輸(shu)(shu)送(song)(song)(song)時(shi)堵塞。當水平管(guan)(guan)(guan)道(dao)(dao)中的(de)(de)(de)(de)(de)(de)物料表面(mian)(mian)氣(qi)(qi)體速(su)度(du)(du)低于突變(bian)速(su)度(du)(du)時(shi),輸(shu)(shu)送(song)(song)(song)將(jiang)會以(yi)低流(liu)(liu)(liu)量(liang)(liang)通過管(guan)(guan)(guan)道(dao)(dao)橫截(jie)面(mian)(mian)的(de)(de)(de)(de)(de)(de)上部,在(zai)(zai)管(guan)(guan)(guan)道(dao)(dao)的(de)(de)(de)(de)(de)(de)剩余部分(fen)(fen)以(yi)高(gao)濃度(du)(du)低速(su)度(du)(du)的(de)(de)(de)(de)(de)(de)形式(shi)填(tian)充。有時(shi)沿管(guan)(guan)(guan)道(dao)(dao)的(de)(de)(de)(de)(de)(de)橫截(jie)面(mian)(mian)會被(bei)填(tian)滿(man),而(er)有時(shi)只(zhi)是(shi)(shi)部分(fen)(fen)被(bei)填(tian)滿(man).
實(shi)際應用(yong)中, 按照氣(qi)力驅(qu)動形式可(ke)以(yi)分(fen)(fen)為負壓和(he)正壓氣(qi)力輸送(song)(song)(song), 在這兩種輸送(song)(song)(song)系統(tong)中, 根(gen)據流(liu)動狀態(tai)圖再區(qu)分(fen)(fen)分(fen)(fen)為稀相(xiang), 密相(xiang)和(he)流(liu)化態(tai)輸送(song)(song)(song)系統(tong). 除此之外,根(gen)據喂料(liao)不同(tong)分(fen)(fen)為連續(xu)和(he)批次輸送(song)(song)(song). 在高(gao)壓密相(xiang)輸送(song)(song)(song)技術(shu)中常采(cai)用(yong)批次的壓力罐進(jin)行高(gao)壓輸送(song)(song)(song), 同(tong)時(shi), 可(ke)以(yi)組合兩個壓力罐設計達到連續(xu)的輸送(song)(song)(song).
密相氣(qi)力輸送特(te)點:
● 用(yong)氣(qi)量小(xiao), 節能
● 無殘留輸送
● 不堵塞, 運行可靠
● 維護費用低
● 適(shi)合于各類粉粒物料
● 壓力至0. 6m p a可調
● 適合于柔(rou)性(xing)化自動生產(chan)中的物料高效輸送

