密相氣力(li)輸送系列

氣力(li)輸送原理

氣(qi)力(li)輸(shu)(shu)(shu)送(song)(song)(song)(song)系(xi)(xi)統(tong)可分(fen)類為(wei)(wei)不(bu)同(tong)(tong)的(de)(de)(de)(de)(de)(de)(de)流(liu)(liu)(liu)動(dong)(dong)型式(shi)，其(qi)中兩種(zhong)(zhong)主要型式(shi)是(shi)(shi)(shi)：(a) 稀(xi)相(xiang)(xiang)(xiang)輸(shu)(shu)(shu)送(song)(song)(song)(song)和（b）密(mi)(mi)相(xiang)(xiang)(xiang)輸(shu)(shu)(shu)送(song)(song)(song)(song)每(mei)種(zhong)(zhong)流(liu)(liu)(liu)動(dong)(dong)型式(shi)可按物(wu)料(liao)與(yu)空氣(qi)的(de)(de)(de)(de)(de)(de)(de)流(liu)(liu)(liu)量(liang)比率(lv)大(da)小分(fen)類，其(qi)比率(lv)也(ye)被(bei)(bei)(bei)稱(cheng)為(wei)(wei)“固氣(qi)比”： μ=ms/mf (1)許多(duo)稀(xi)相(xiang)(xiang)(xiang)的(de)(de)(de)(de)(de)(de)(de)運行(xing)范(fan)圍為(wei)(wei)0＜μ＜15，而(er)密(mi)(mi)相(xiang)(xiang)(xiang)通常(chang)(chang)(chang)是(shi)(shi)(shi)μ＞15。圖(tu)(tu)1所(suo)(suo)示(shi)的(de)(de)(de)(de)(de)(de)(de)是(shi)(shi)(shi)典(dian)型輸(shu)(shu)(shu)送(song)(song)(song)(song)狀態圖(tu)(tu)。稀(xi)相(xiang)(xiang)(xiang)輸(shu)(shu)(shu)送(song)(song)(song)(song)可以(yi)被(bei)(bei)(bei)認為(wei)(wei)是(shi)(shi)(shi)一種(zhong)(zhong)完全(quan)的(de)(de)(de)(de)(de)(de)(de)懸浮(fu)(fu)流(liu)(liu)(liu)，而(er)密(mi)(mi)相(xiang)(xiang)(xiang)輸(shu)(shu)(shu)送(song)(song)(song)(song)通常(chang)(chang)(chang)被(bei)(bei)(bei)認為(wei)(wei)是(shi)(shi)(shi)非懸浮(fu)(fu)流(liu)(liu)(liu)。然而(er)，如圖(tu)(tu)1所(suo)(suo)示(shi)，許多(duo)不(bu)同(tong)(tong)種(zhong)(zhong)類的(de)(de)(de)(de)(de)(de)(de)密(mi)(mi)相(xiang)(xiang)(xiang)（非懸浮(fu)(fu)流(liu)(liu)(liu)）依靠散料(liao)的(de)(de)(de)(de)(de)(de)(de)料(liao)性(xing)(xing)和流(liu)(liu)(liu)動(dong)(dong)性(xing)(xing)存在。密(mi)(mi)相(xiang)(xiang)(xiang)輸(shu)(shu)(shu)送(song)(song)(song)(song)同(tong)(tong)樣也(ye)能被(bei)(bei)(bei)定義為(wei)(wei)輸(shu)(shu)(shu)送(song)(song)(song)(song)物(wu)料(liao)完全(quan)填(tian)滿(man)(man)管(guan)道(dao)截(jie)面(mian)的(de)(de)(de)(de)(de)(de)(de)一種(zhong)(zhong)輸(shu)(shu)(shu)送(song)(song)(song)(song)方式(shi)。稀(xi)相(xiang)(xiang)(xiang)輸(shu)(shu)(shu)送(song)(song)(song)(song)通常(chang)(chang)(chang)需(xu)要使用大(da)量(liang)的(de)(de)(de)(de)(de)(de)(de)高(gao)速(su)氣(qi)體。氣(qi)流(liu)(liu)(liu)依靠升力(li)和推動(dong)(dong)力(li)以(yi)離散粒(li)子的(de)(de)(de)(de)(de)(de)(de)形式(shi)攜帶著物(wu)料(liao)。參考圖(tu)(tu)1中所(suo)(suo)述的(de)(de)(de)(de)(de)(de)(de)“懸浮(fu)(fu)流(liu)(liu)(liu)”，稀(xi)相(xiang)(xiang)(xiang)系(xi)(xi)統(tong)通常(chang)(chang)(chang)是(shi)(shi)(shi)最為(wei)(wei)被(bei)(bei)(bei)廣泛應(ying)(ying)用的(de)(de)(de)(de)(de)(de)(de)氣(qi)力(li)輸(shu)(shu)(shu)送(song)(song)(song)(song)系(xi)(xi)統(tong)。由于稀(xi)相(xiang)(xiang)(xiang)系(xi)(xi)統(tong)設計的(de)(de)(de)(de)(de)(de)(de)相(xiang)(xiang)(xiang)對簡(jian)單性(xing)(xing)，它們同(tong)(tong)時也(ye)被(bei)(bei)(bei)頻繁(fan)的(de)(de)(de)(de)(de)(de)(de)應(ying)(ying)用在工業(ye)領域。輸(shu)(shu)(shu)送(song)(song)(song)(song)氣(qi)體的(de)(de)(de)(de)(de)(de)(de)速(su)度減少到比保持粒(li)子懸浮(fu)(fu)狀態的(de)(de)(de)(de)(de)(de)(de)臨(lin)界值更(geng)小時，導致物(wu)料(liao)在輸(shu)(shu)(shu)送(song)(song)(song)(song)管(guan)道(dao)的(de)(de)(de)(de)(de)(de)(de)橫(heng)截(jie)面(mian)形成不(bu)均勻的(de)(de)(de)(de)(de)(de)(de)分(fen)布。臨(lin)界氣(qi)體速(su)度被(bei)(bei)(bei)稱(cheng)為(wei)(wei)是(shi)(shi)(shi)水(shui)平輸(shu)(shu)(shu)送(song)(song)(song)(song)的(de)(de)(de)(de)(de)(de)(de)跳躍速(su)度，垂(chui)直輸(shu)(shu)(shu)送(song)(song)(song)(song)時堵塞。當水(shui)平管(guan)道(dao)中的(de)(de)(de)(de)(de)(de)(de)物(wu)料(liao)表面(mian)氣(qi)體速(su)度低于突(tu)變速(su)度時，輸(shu)(shu)(shu)送(song)(song)(song)(song)將會以(yi)低流(liu)(liu)(liu)量(liang)通過管(guan)道(dao)橫(heng)截(jie)面(mian)的(de)(de)(de)(de)(de)(de)(de)上(shang)部(bu)(bu)，在管(guan)道(dao)的(de)(de)(de)(de)(de)(de)(de)剩余部(bu)(bu)分(fen)以(yi)高(gao)濃度低速(su)度的(de)(de)(de)(de)(de)(de)(de)形式(shi)填(tian)充。有(you)時沿管(guan)道(dao)的(de)(de)(de)(de)(de)(de)(de)橫(heng)截(jie)面(mian)會被(bei)(bei)(bei)填(tian)滿(man)(man)，而(er)有(you)時只是(shi)(shi)(shi)部(bu)(bu)分(fen)被(bei)(bei)(bei)填(tian)滿(man)(man).

實際應(ying)用(yong)中(zhong), 按照(zhao)氣力驅動(dong)形式可以分為負壓(ya)(ya)(ya)和(he)正壓(ya)(ya)(ya)氣力輸(shu)送, 在(zai)這兩種輸(shu)送系統中(zhong), 根據(ju)(ju)流動(dong)狀態圖再區分分為稀相, 密相和(he)流化(hua)態輸(shu)送系統. 除此(ci)之外,根據(ju)(ju)喂料不同(tong)分為連續和(he)批次輸(shu)送. 在(zai)高壓(ya)(ya)(ya)密相輸(shu)送技術中(zhong)常采用(yong)批次的壓(ya)(ya)(ya)力罐(guan)進(jin)行(xing)高壓(ya)(ya)(ya)輸(shu)送, 同(tong)時, 可以組合兩個壓(ya)(ya)(ya)力罐(guan)設計達(da)到連續的輸(shu)送.

密相(xiang)氣力輸送特點:

● 用(yong)氣量(liang)小(xiao), 節能

● 無殘留輸送

● 不堵塞, 運行(xing)可靠

● 維護費用低

● 適合(he)于各類粉粒物料

● 壓力至0. 6m p a可調

● 適(shi)合于柔性(xing)化自(zi)動生產(chan)中(zhong)的物(wu)料高效輸(shu)送