密相氣力輸送系(xi)列

氣力輸(shu)送原理(li)

氣(qi)(qi)(qi)(qi)力(li)(li)輸(shu)(shu)(shu)送(song)(song)(song)(song)(song)系(xi)統(tong)可分類(lei)為(wei)(wei)不同(tong)(tong)的(de)流(liu)(liu)(liu)動(dong)型式(shi)，其(qi)中(zhong)兩種(zhong)主要(yao)(yao)型式(shi)是(shi)(shi)：(a) 稀(xi)(xi)(xi)相(xiang)(xiang)輸(shu)(shu)(shu)送(song)(song)(song)(song)(song)和（b）密相(xiang)(xiang)輸(shu)(shu)(shu)送(song)(song)(song)(song)(song)每種(zhong)流(liu)(liu)(liu)動(dong)型式(shi)可按(an)物(wu)料(liao)與空(kong)氣(qi)(qi)(qi)(qi)的(de)流(liu)(liu)(liu)量(liang)比率大小分類(lei)，其(qi)比率也(ye)被(bei)(bei)稱為(wei)(wei)“固(gu)氣(qi)(qi)(qi)(qi)比”： μ=ms/mf (1)許(xu)多稀(xi)(xi)(xi)相(xiang)(xiang)的(de)運行范圍為(wei)(wei)0＜μ＜15，而(er)密相(xiang)(xiang)通(tong)常是(shi)(shi)μ＞15。圖(tu)1所(suo)示的(de)是(shi)(shi)典(dian)型輸(shu)(shu)(shu)送(song)(song)(song)(song)(song)狀態(tai)圖(tu)。稀(xi)(xi)(xi)相(xiang)(xiang)輸(shu)(shu)(shu)送(song)(song)(song)(song)(song)可以被(bei)(bei)認為(wei)(wei)是(shi)(shi)一種(zhong)完(wan)全的(de)懸(xuan)浮(fu)(fu)流(liu)(liu)(liu)，而(er)密相(xiang)(xiang)輸(shu)(shu)(shu)送(song)(song)(song)(song)(song)通(tong)常被(bei)(bei)認為(wei)(wei)是(shi)(shi)非(fei)懸(xuan)浮(fu)(fu)流(liu)(liu)(liu)。然而(er)，如圖(tu)1所(suo)示，許(xu)多不同(tong)(tong)種(zhong)類(lei)的(de)密相(xiang)(xiang)（非(fei)懸(xuan)浮(fu)(fu)流(liu)(liu)(liu)）依靠散料(liao)的(de)料(liao)性(xing)(xing)和流(liu)(liu)(liu)動(dong)性(xing)(xing)存在。密相(xiang)(xiang)輸(shu)(shu)(shu)送(song)(song)(song)(song)(song)同(tong)(tong)樣也(ye)能(neng)被(bei)(bei)定義為(wei)(wei)輸(shu)(shu)(shu)送(song)(song)(song)(song)(song)物(wu)料(liao)完(wan)全填滿管(guan)道(dao)(dao)(dao)(dao)截(jie)(jie)面的(de)一種(zhong)輸(shu)(shu)(shu)送(song)(song)(song)(song)(song)方(fang)式(shi)。稀(xi)(xi)(xi)相(xiang)(xiang)輸(shu)(shu)(shu)送(song)(song)(song)(song)(song)通(tong)常需要(yao)(yao)使用(yong)(yong)大量(liang)的(de)高速(su)氣(qi)(qi)(qi)(qi)體。氣(qi)(qi)(qi)(qi)流(liu)(liu)(liu)依靠升(sheng)力(li)(li)和推動(dong)力(li)(li)以離散粒子的(de)形(xing)(xing)式(shi)攜帶著物(wu)料(liao)。參考圖(tu)1中(zhong)所(suo)述的(de)“懸(xuan)浮(fu)(fu)流(liu)(liu)(liu)”，稀(xi)(xi)(xi)相(xiang)(xiang)系(xi)統(tong)通(tong)常是(shi)(shi)最為(wei)(wei)被(bei)(bei)廣泛(fan)應用(yong)(yong)的(de)氣(qi)(qi)(qi)(qi)力(li)(li)輸(shu)(shu)(shu)送(song)(song)(song)(song)(song)系(xi)統(tong)。由于(yu)稀(xi)(xi)(xi)相(xiang)(xiang)系(xi)統(tong)設計的(de)相(xiang)(xiang)對(dui)簡單性(xing)(xing)，它們同(tong)(tong)時也(ye)被(bei)(bei)頻繁的(de)應用(yong)(yong)在工業領域。輸(shu)(shu)(shu)送(song)(song)(song)(song)(song)氣(qi)(qi)(qi)(qi)體的(de)速(su)度減少到比保持粒子懸(xuan)浮(fu)(fu)狀態(tai)的(de)臨界值更(geng)小時，導致物(wu)料(liao)在輸(shu)(shu)(shu)送(song)(song)(song)(song)(song)管(guan)道(dao)(dao)(dao)(dao)的(de)橫(heng)截(jie)(jie)面形(xing)(xing)成(cheng)不均勻的(de)分布。臨界氣(qi)(qi)(qi)(qi)體速(su)度被(bei)(bei)稱為(wei)(wei)是(shi)(shi)水(shui)平輸(shu)(shu)(shu)送(song)(song)(song)(song)(song)的(de)跳(tiao)躍速(su)度，垂直輸(shu)(shu)(shu)送(song)(song)(song)(song)(song)時堵塞。當水(shui)平管(guan)道(dao)(dao)(dao)(dao)中(zhong)的(de)物(wu)料(liao)表面氣(qi)(qi)(qi)(qi)體速(su)度低于(yu)突變速(su)度時，輸(shu)(shu)(shu)送(song)(song)(song)(song)(song)將會以低流(liu)(liu)(liu)量(liang)通(tong)過管(guan)道(dao)(dao)(dao)(dao)橫(heng)截(jie)(jie)面的(de)上(shang)部，在管(guan)道(dao)(dao)(dao)(dao)的(de)剩余部分以高濃度低速(su)度的(de)形(xing)(xing)式(shi)填充。有時沿管(guan)道(dao)(dao)(dao)(dao)的(de)橫(heng)截(jie)(jie)面會被(bei)(bei)填滿，而(er)有時只是(shi)(shi)部分被(bei)(bei)填滿.

實(shi)際應用(yong)中, 按照氣(qi)力驅動形式可以分為負壓(ya)(ya)和正(zheng)壓(ya)(ya)氣(qi)力輸(shu)(shu)送(song)(song)(song), 在這兩種輸(shu)(shu)送(song)(song)(song)系統中, 根(gen)據流動狀態圖再區分分為稀相, 密(mi)相和流化態輸(shu)(shu)送(song)(song)(song)系統. 除此之外,根(gen)據喂料(liao)不同(tong)分為連(lian)續和批次(ci)輸(shu)(shu)送(song)(song)(song). 在高壓(ya)(ya)密(mi)相輸(shu)(shu)送(song)(song)(song)技術中常采用(yong)批次(ci)的(de)壓(ya)(ya)力罐進行高壓(ya)(ya)輸(shu)(shu)送(song)(song)(song), 同(tong)時, 可以組(zu)合(he)兩個壓(ya)(ya)力罐設計達到連(lian)續的(de)輸(shu)(shu)送(song)(song)(song).

密相氣力(li)輸送(song)特(te)點:

● 用氣量小(xiao), 節能(neng)

● 無殘留輸送

● 不堵(du)塞, 運行可靠

● 維護費用低

● 適合于各類粉粒物料

● 壓力至0. 6m p a可調

● 適合于柔性化自動生產中的物(wu)料高效輸送