密相氣力輸送系列

氣力輸送原理

氣(qi)力輸(shu)(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)系(xi)統(tong)可(ke)分類(lei)為(wei)不同(tong)(tong)的(de)(de)(de)(de)流(liu)動型(xing)(xing)式，其(qi)中(zhong)兩種主要型(xing)(xing)式是(shi)(shi)(shi)：(a) 稀相(xiang)(xiang)(xiang)(xiang)輸(shu)(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)和（b）密(mi)相(xiang)(xiang)(xiang)(xiang)輸(shu)(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)每種流(liu)動型(xing)(xing)式可(ke)按物(wu)(wu)料(liao)與(yu)空氣(qi)的(de)(de)(de)(de)流(liu)量(liang)比(bi)率(lv)大小分類(lei)，其(qi)比(bi)率(lv)也被(bei)(bei)稱(cheng)為(wei)“固氣(qi)比(bi)”： μ=ms/mf (1)許多稀相(xiang)(xiang)(xiang)(xiang)的(de)(de)(de)(de)運行(xing)范圍為(wei)0＜μ＜15，而(er)密(mi)相(xiang)(xiang)(xiang)(xiang)通(tong)常(chang)是(shi)(shi)(shi)μ＞15。圖(tu)(tu)1所示的(de)(de)(de)(de)是(shi)(shi)(shi)典型(xing)(xing)輸(shu)(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)狀態圖(tu)(tu)。稀相(xiang)(xiang)(xiang)(xiang)輸(shu)(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)可(ke)以被(bei)(bei)認為(wei)是(shi)(shi)(shi)一種完(wan)全(quan)的(de)(de)(de)(de)懸浮(fu)流(liu)，而(er)密(mi)相(xiang)(xiang)(xiang)(xiang)輸(shu)(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)通(tong)常(chang)被(bei)(bei)認為(wei)是(shi)(shi)(shi)非(fei)懸浮(fu)流(liu)。然而(er)，如圖(tu)(tu)1所示，許多不同(tong)(tong)種類(lei)的(de)(de)(de)(de)密(mi)相(xiang)(xiang)(xiang)(xiang)（非(fei)懸浮(fu)流(liu)）依靠散料(liao)的(de)(de)(de)(de)料(liao)性(xing)和流(liu)動性(xing)存在。密(mi)相(xiang)(xiang)(xiang)(xiang)輸(shu)(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)同(tong)(tong)樣(yang)也能被(bei)(bei)定義(yi)為(wei)輸(shu)(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)物(wu)(wu)料(liao)完(wan)全(quan)填(tian)(tian)(tian)滿管(guan)道(dao)(dao)截面(mian)的(de)(de)(de)(de)一種輸(shu)(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)方式。稀相(xiang)(xiang)(xiang)(xiang)輸(shu)(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)通(tong)常(chang)需要使用(yong)(yong)大量(liang)的(de)(de)(de)(de)高(gao)速(su)氣(qi)體(ti)。氣(qi)流(liu)依靠升(sheng)力和推動力以離散粒(li)子(zi)的(de)(de)(de)(de)形(xing)式攜帶著物(wu)(wu)料(liao)。參考圖(tu)(tu)1中(zhong)所述的(de)(de)(de)(de)“懸浮(fu)流(liu)”，稀相(xiang)(xiang)(xiang)(xiang)系(xi)統(tong)通(tong)常(chang)是(shi)(shi)(shi)最為(wei)被(bei)(bei)廣泛應用(yong)(yong)的(de)(de)(de)(de)氣(qi)力輸(shu)(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)系(xi)統(tong)。由于稀相(xiang)(xiang)(xiang)(xiang)系(xi)統(tong)設計的(de)(de)(de)(de)相(xiang)(xiang)(xiang)(xiang)對簡單性(xing)，它(ta)們同(tong)(tong)時也被(bei)(bei)頻繁的(de)(de)(de)(de)應用(yong)(yong)在工業領域。輸(shu)(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)氣(qi)體(ti)的(de)(de)(de)(de)速(su)度(du)(du)減少到比(bi)保持粒(li)子(zi)懸浮(fu)狀態的(de)(de)(de)(de)臨(lin)界值(zhi)更小時，導(dao)致物(wu)(wu)料(liao)在輸(shu)(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)管(guan)道(dao)(dao)的(de)(de)(de)(de)橫截面(mian)形(xing)成不均勻(yun)的(de)(de)(de)(de)分布。臨(lin)界氣(qi)體(ti)速(su)度(du)(du)被(bei)(bei)稱(cheng)為(wei)是(shi)(shi)(shi)水平(ping)輸(shu)(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)的(de)(de)(de)(de)跳(tiao)躍速(su)度(du)(du)，垂直輸(shu)(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)時堵(du)塞。當(dang)水平(ping)管(guan)道(dao)(dao)中(zhong)的(de)(de)(de)(de)物(wu)(wu)料(liao)表(biao)面(mian)氣(qi)體(ti)速(su)度(du)(du)低于突變(bian)速(su)度(du)(du)時，輸(shu)(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)將會(hui)以低流(liu)量(liang)通(tong)過管(guan)道(dao)(dao)橫截面(mian)的(de)(de)(de)(de)上部，在管(guan)道(dao)(dao)的(de)(de)(de)(de)剩余(yu)部分以高(gao)濃度(du)(du)低速(su)度(du)(du)的(de)(de)(de)(de)形(xing)式填(tian)(tian)(tian)充。有時沿管(guan)道(dao)(dao)的(de)(de)(de)(de)橫截面(mian)會(hui)被(bei)(bei)填(tian)(tian)(tian)滿，而(er)有時只是(shi)(shi)(shi)部分被(bei)(bei)填(tian)(tian)(tian)滿.

實際應用中, 按照氣力(li)(li)驅動(dong)形式可(ke)以分(fen)為(wei)負壓(ya)(ya)和(he)正壓(ya)(ya)氣力(li)(li)輸(shu)送, 在這兩(liang)種輸(shu)送系(xi)統(tong)中, 根據流動(dong)狀(zhuang)態圖再區分(fen)分(fen)為(wei)稀相(xiang), 密(mi)相(xiang)和(he)流化態輸(shu)送系(xi)統(tong). 除此(ci)之外(wai),根據喂料(liao)不(bu)同分(fen)為(wei)連(lian)續(xu)和(he)批次輸(shu)送. 在高壓(ya)(ya)密(mi)相(xiang)輸(shu)送技(ji)術中常(chang)采用批次的(de)壓(ya)(ya)力(li)(li)罐進行高壓(ya)(ya)輸(shu)送, 同時, 可(ke)以組合兩(liang)個壓(ya)(ya)力(li)(li)罐設計達到連(lian)續(xu)的(de)輸(shu)送.

密(mi)相氣力輸送特點:

● 用氣量(liang)小(xiao), 節能

● 無殘留輸送

● 不堵塞, 運行(xing)可(ke)靠(kao)

● 維護費用低

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● 壓力至(zhi)0. 6m p a可調

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