密相氣(qi)力輸(shu)送系(xi)列

氣力(li)輸(shu)送原理(li)

氣(qi)(qi)力(li)輸(shu)(shu)送(song)(song)(song)(song)系統(tong)可分(fen)類為(wei)(wei)不同的(de)(de)(de)(de)(de)(de)(de)流(liu)(liu)動(dong)型式(shi)(shi)，其中兩(liang)種主要型式(shi)(shi)是(shi)(shi)：(a) 稀(xi)相(xiang)(xiang)(xiang)(xiang)輸(shu)(shu)送(song)(song)(song)(song)和（b）密(mi)相(xiang)(xiang)(xiang)(xiang)輸(shu)(shu)送(song)(song)(song)(song)每種流(liu)(liu)動(dong)型式(shi)(shi)可按物料與(yu)空氣(qi)(qi)的(de)(de)(de)(de)(de)(de)(de)流(liu)(liu)量比率大(da)小分(fen)類，其比率也被(bei)稱為(wei)(wei)“固氣(qi)(qi)比”： μ=ms/mf (1)許多稀(xi)相(xiang)(xiang)(xiang)(xiang)的(de)(de)(de)(de)(de)(de)(de)運行范圍(wei)為(wei)(wei)0＜μ＜15，而(er)(er)密(mi)相(xiang)(xiang)(xiang)(xiang)通常(chang)(chang)是(shi)(shi)μ＞15。圖(tu)1所示的(de)(de)(de)(de)(de)(de)(de)是(shi)(shi)典型輸(shu)(shu)送(song)(song)(song)(song)狀態圖(tu)。稀(xi)相(xiang)(xiang)(xiang)(xiang)輸(shu)(shu)送(song)(song)(song)(song)可以被(bei)認為(wei)(wei)是(shi)(shi)一(yi)種完全的(de)(de)(de)(de)(de)(de)(de)懸(xuan)(xuan)浮(fu)流(liu)(liu)，而(er)(er)密(mi)相(xiang)(xiang)(xiang)(xiang)輸(shu)(shu)送(song)(song)(song)(song)通常(chang)(chang)被(bei)認為(wei)(wei)是(shi)(shi)非懸(xuan)(xuan)浮(fu)流(liu)(liu)。然而(er)(er)，如(ru)圖(tu)1所示，許多不同種類的(de)(de)(de)(de)(de)(de)(de)密(mi)相(xiang)(xiang)(xiang)(xiang)（非懸(xuan)(xuan)浮(fu)流(liu)(liu)）依(yi)靠散料的(de)(de)(de)(de)(de)(de)(de)料性(xing)和流(liu)(liu)動(dong)性(xing)存(cun)在(zai)。密(mi)相(xiang)(xiang)(xiang)(xiang)輸(shu)(shu)送(song)(song)(song)(song)同樣也能被(bei)定(ding)義為(wei)(wei)輸(shu)(shu)送(song)(song)(song)(song)物料完全填滿(man)管道截(jie)面(mian)(mian)的(de)(de)(de)(de)(de)(de)(de)一(yi)種輸(shu)(shu)送(song)(song)(song)(song)方式(shi)(shi)。稀(xi)相(xiang)(xiang)(xiang)(xiang)輸(shu)(shu)送(song)(song)(song)(song)通常(chang)(chang)需要使用大(da)量的(de)(de)(de)(de)(de)(de)(de)高(gao)速(su)(su)氣(qi)(qi)體。氣(qi)(qi)流(liu)(liu)依(yi)靠升力(li)和推動(dong)力(li)以離散粒子的(de)(de)(de)(de)(de)(de)(de)形(xing)式(shi)(shi)攜帶著物料。參考(kao)圖(tu)1中所述(shu)的(de)(de)(de)(de)(de)(de)(de)“懸(xuan)(xuan)浮(fu)流(liu)(liu)”，稀(xi)相(xiang)(xiang)(xiang)(xiang)系統(tong)通常(chang)(chang)是(shi)(shi)最為(wei)(wei)被(bei)廣泛應(ying)用的(de)(de)(de)(de)(de)(de)(de)氣(qi)(qi)力(li)輸(shu)(shu)送(song)(song)(song)(song)系統(tong)。由于稀(xi)相(xiang)(xiang)(xiang)(xiang)系統(tong)設計(ji)的(de)(de)(de)(de)(de)(de)(de)相(xiang)(xiang)(xiang)(xiang)對簡單性(xing)，它們同時(shi)也被(bei)頻(pin)繁的(de)(de)(de)(de)(de)(de)(de)應(ying)用在(zai)工業領域(yu)。輸(shu)(shu)送(song)(song)(song)(song)氣(qi)(qi)體的(de)(de)(de)(de)(de)(de)(de)速(su)(su)度(du)(du)減少到比保持粒子懸(xuan)(xuan)浮(fu)狀態的(de)(de)(de)(de)(de)(de)(de)臨界值更(geng)小時(shi)，導致物料在(zai)輸(shu)(shu)送(song)(song)(song)(song)管道的(de)(de)(de)(de)(de)(de)(de)橫截(jie)面(mian)(mian)形(xing)成不均(jun)勻的(de)(de)(de)(de)(de)(de)(de)分(fen)布(bu)。臨界氣(qi)(qi)體速(su)(su)度(du)(du)被(bei)稱為(wei)(wei)是(shi)(shi)水(shui)平輸(shu)(shu)送(song)(song)(song)(song)的(de)(de)(de)(de)(de)(de)(de)跳躍速(su)(su)度(du)(du)，垂直輸(shu)(shu)送(song)(song)(song)(song)時(shi)堵塞。當水(shui)平管道中的(de)(de)(de)(de)(de)(de)(de)物料表面(mian)(mian)氣(qi)(qi)體速(su)(su)度(du)(du)低(di)于突變速(su)(su)度(du)(du)時(shi)，輸(shu)(shu)送(song)(song)(song)(song)將(jiang)會(hui)以低(di)流(liu)(liu)量通過管道橫截(jie)面(mian)(mian)的(de)(de)(de)(de)(de)(de)(de)上部(bu)，在(zai)管道的(de)(de)(de)(de)(de)(de)(de)剩余部(bu)分(fen)以高(gao)濃度(du)(du)低(di)速(su)(su)度(du)(du)的(de)(de)(de)(de)(de)(de)(de)形(xing)式(shi)(shi)填充。有時(shi)沿管道的(de)(de)(de)(de)(de)(de)(de)橫截(jie)面(mian)(mian)會(hui)被(bei)填滿(man)，而(er)(er)有時(shi)只是(shi)(shi)部(bu)分(fen)被(bei)填滿(man).

實(shi)際應用(yong)中, 按照氣力驅動形式可以(yi)分為(wei)負壓和正壓氣力輸(shu)(shu)送(song)(song), 在(zai)這兩(liang)種輸(shu)(shu)送(song)(song)系統(tong)中, 根據流動狀態(tai)圖再區分分為(wei)稀相, 密(mi)相和流化態(tai)輸(shu)(shu)送(song)(song)系統(tong). 除(chu)此之(zhi)外,根據喂料(liao)不(bu)同(tong)分為(wei)連(lian)(lian)續和批次(ci)輸(shu)(shu)送(song)(song). 在(zai)高壓密(mi)相輸(shu)(shu)送(song)(song)技(ji)術中常采用(yong)批次(ci)的壓力罐進行(xing)高壓輸(shu)(shu)送(song)(song), 同(tong)時(shi), 可以(yi)組合(he)兩(liang)個壓力罐設計(ji)達(da)到(dao)連(lian)(lian)續的輸(shu)(shu)送(song)(song).

密相氣力輸送(song)特點(dian):

● 用氣量小, 節能

● 無殘留輸送

● 不堵塞, 運行可靠

● 維護費用低

● 適合(he)于(yu)各類粉粒物料

● 壓力(li)至(zhi)0. 6m p a可調

● 適合于柔性化(hua)自動生產中的物(wu)料高效(xiao)輸送