密(mi)相氣力輸送系列

氣力輸送原(yuan)理

氣(qi)力(li)輸(shu)(shu)送(song)(song)系統可分類(lei)為(wei)不(bu)同(tong)(tong)的(de)(de)(de)流動型(xing)式(shi)，其中兩種(zhong)主要型(xing)式(shi)是(shi)(shi)：(a) 稀(xi)相(xiang)(xiang)(xiang)輸(shu)(shu)送(song)(song)和(he)(he)（b）密(mi)相(xiang)(xiang)(xiang)輸(shu)(shu)送(song)(song)每(mei)種(zhong)流動型(xing)式(shi)可按(an)物(wu)料與空氣(qi)的(de)(de)(de)流量(liang)比(bi)率大(da)小(xiao)(xiao)分類(lei)，其比(bi)率也(ye)被(bei)(bei)稱為(wei)“固氣(qi)比(bi)”： μ=ms/mf (1)許多稀(xi)相(xiang)(xiang)(xiang)的(de)(de)(de)運行(xing)范(fan)圍(wei)為(wei)0＜μ＜15，而密(mi)相(xiang)(xiang)(xiang)通(tong)(tong)常(chang)是(shi)(shi)μ＞15。圖(tu)1所示(shi)的(de)(de)(de)是(shi)(shi)典(dian)型(xing)輸(shu)(shu)送(song)(song)狀(zhuang)態圖(tu)。稀(xi)相(xiang)(xiang)(xiang)輸(shu)(shu)送(song)(song)可以被(bei)(bei)認為(wei)是(shi)(shi)一種(zhong)完(wan)(wan)全的(de)(de)(de)懸浮流，而密(mi)相(xiang)(xiang)(xiang)輸(shu)(shu)送(song)(song)通(tong)(tong)常(chang)被(bei)(bei)認為(wei)是(shi)(shi)非(fei)懸浮流。然(ran)而，如(ru)圖(tu)1所示(shi)，許多不(bu)同(tong)(tong)種(zhong)類(lei)的(de)(de)(de)密(mi)相(xiang)(xiang)(xiang)（非(fei)懸浮流）依靠(kao)散料的(de)(de)(de)料性和(he)(he)流動性存在。密(mi)相(xiang)(xiang)(xiang)輸(shu)(shu)送(song)(song)同(tong)(tong)樣也(ye)能被(bei)(bei)定(ding)義為(wei)輸(shu)(shu)送(song)(song)物(wu)料完(wan)(wan)全填滿(man)管(guan)(guan)(guan)(guan)(guan)道(dao)(dao)截面(mian)的(de)(de)(de)一種(zhong)輸(shu)(shu)送(song)(song)方式(shi)。稀(xi)相(xiang)(xiang)(xiang)輸(shu)(shu)送(song)(song)通(tong)(tong)常(chang)需要使用大(da)量(liang)的(de)(de)(de)高速(su)(su)(su)氣(qi)體(ti)。氣(qi)流依靠(kao)升力(li)和(he)(he)推動力(li)以離散粒(li)子(zi)的(de)(de)(de)形(xing)式(shi)攜帶(dai)著物(wu)料。參考圖(tu)1中所述的(de)(de)(de)“懸浮流”，稀(xi)相(xiang)(xiang)(xiang)系統通(tong)(tong)常(chang)是(shi)(shi)最為(wei)被(bei)(bei)廣泛應用的(de)(de)(de)氣(qi)力(li)輸(shu)(shu)送(song)(song)系統。由于(yu)稀(xi)相(xiang)(xiang)(xiang)系統設計的(de)(de)(de)相(xiang)(xiang)(xiang)對簡(jian)單性，它(ta)們(men)同(tong)(tong)時(shi)也(ye)被(bei)(bei)頻繁的(de)(de)(de)應用在工業領域。輸(shu)(shu)送(song)(song)氣(qi)體(ti)的(de)(de)(de)速(su)(su)(su)度(du)(du)(du)減(jian)少到比(bi)保持粒(li)子(zi)懸浮狀(zhuang)態的(de)(de)(de)臨界值更小(xiao)(xiao)時(shi)，導致物(wu)料在輸(shu)(shu)送(song)(song)管(guan)(guan)(guan)(guan)(guan)道(dao)(dao)的(de)(de)(de)橫截面(mian)形(xing)成(cheng)不(bu)均勻的(de)(de)(de)分布。臨界氣(qi)體(ti)速(su)(su)(su)度(du)(du)(du)被(bei)(bei)稱為(wei)是(shi)(shi)水平輸(shu)(shu)送(song)(song)的(de)(de)(de)跳(tiao)躍速(su)(su)(su)度(du)(du)(du)，垂直輸(shu)(shu)送(song)(song)時(shi)堵(du)塞。當水平管(guan)(guan)(guan)(guan)(guan)道(dao)(dao)中的(de)(de)(de)物(wu)料表面(mian)氣(qi)體(ti)速(su)(su)(su)度(du)(du)(du)低于(yu)突變(bian)速(su)(su)(su)度(du)(du)(du)時(shi)，輸(shu)(shu)送(song)(song)將(jiang)會(hui)以低流量(liang)通(tong)(tong)過管(guan)(guan)(guan)(guan)(guan)道(dao)(dao)橫截面(mian)的(de)(de)(de)上(shang)部(bu)，在管(guan)(guan)(guan)(guan)(guan)道(dao)(dao)的(de)(de)(de)剩余部(bu)分以高濃度(du)(du)(du)低速(su)(su)(su)度(du)(du)(du)的(de)(de)(de)形(xing)式(shi)填充。有時(shi)沿管(guan)(guan)(guan)(guan)(guan)道(dao)(dao)的(de)(de)(de)橫截面(mian)會(hui)被(bei)(bei)填滿(man)，而有時(shi)只是(shi)(shi)部(bu)分被(bei)(bei)填滿(man).

實際(ji)應用(yong)中(zhong), 按照(zhao)氣(qi)力(li)驅動形式(shi)可以分(fen)為(wei)負壓和正(zheng)壓氣(qi)力(li)輸(shu)(shu)送(song)(song)(song)(song), 在這兩(liang)種輸(shu)(shu)送(song)(song)(song)(song)系統(tong)中(zhong), 根(gen)據流動狀態圖再區分(fen)分(fen)為(wei)稀(xi)相(xiang), 密相(xiang)和流化態輸(shu)(shu)送(song)(song)(song)(song)系統(tong). 除此之(zhi)外,根(gen)據喂料(liao)不(bu)同(tong)分(fen)為(wei)連(lian)續(xu)和批次(ci)輸(shu)(shu)送(song)(song)(song)(song). 在高壓密相(xiang)輸(shu)(shu)送(song)(song)(song)(song)技術中(zhong)常采用(yong)批次(ci)的(de)壓力(li)罐進(jin)行高壓輸(shu)(shu)送(song)(song)(song)(song), 同(tong)時, 可以組(zu)合兩(liang)個壓力(li)罐設計達(da)到連(lian)續(xu)的(de)輸(shu)(shu)送(song)(song)(song)(song).

密(mi)相氣力輸(shu)送特點:

● 用(yong)氣量小, 節(jie)能

● 無殘(can)留輸送

● 不(bu)堵塞, 運(yun)行可靠

● 維護(hu)費(fei)用低(di)

● 適合于(yu)各類粉(fen)粒(li)物料(liao)

● 壓力至0. 6m p a可(ke)調

● 適合于柔性化(hua)自(zi)動生產中(zhong)的(de)物料高(gao)效輸送