密(mi)相氣力(li)輸送系列

氣力輸(shu)送原理

氣(qi)(qi)力(li)輸(shu)(shu)(shu)(shu)送(song)(song)(song)系(xi)(xi)統可(ke)分類為(wei)不同(tong)的(de)(de)(de)流(liu)(liu)動(dong)型(xing)(xing)式(shi)(shi)(shi)，其中兩種(zhong)主要型(xing)(xing)式(shi)(shi)(shi)是(shi)：(a) 稀(xi)相(xiang)(xiang)(xiang)(xiang)輸(shu)(shu)(shu)(shu)送(song)(song)(song)和（b）密相(xiang)(xiang)(xiang)(xiang)輸(shu)(shu)(shu)(shu)送(song)(song)(song)每種(zhong)流(liu)(liu)動(dong)型(xing)(xing)式(shi)(shi)(shi)可(ke)按物料(liao)與空氣(qi)(qi)的(de)(de)(de)流(liu)(liu)量(liang)比率大小(xiao)分類，其比率也被稱(cheng)為(wei)“固氣(qi)(qi)比”： μ=ms/mf (1)許(xu)多(duo)稀(xi)相(xiang)(xiang)(xiang)(xiang)的(de)(de)(de)運行范(fan)圍(wei)為(wei)0＜μ＜15，而密相(xiang)(xiang)(xiang)(xiang)通(tong)常是(shi)μ＞15。圖(tu)1所示的(de)(de)(de)是(shi)典型(xing)(xing)輸(shu)(shu)(shu)(shu)送(song)(song)(song)狀態(tai)(tai)圖(tu)。稀(xi)相(xiang)(xiang)(xiang)(xiang)輸(shu)(shu)(shu)(shu)送(song)(song)(song)可(ke)以(yi)被認為(wei)是(shi)一種(zhong)完全的(de)(de)(de)懸(xuan)(xuan)浮流(liu)(liu)，而密相(xiang)(xiang)(xiang)(xiang)輸(shu)(shu)(shu)(shu)送(song)(song)(song)通(tong)常被認為(wei)是(shi)非(fei)懸(xuan)(xuan)浮流(liu)(liu)。然(ran)而，如圖(tu)1所示，許(xu)多(duo)不同(tong)種(zhong)類的(de)(de)(de)密相(xiang)(xiang)(xiang)(xiang)（非(fei)懸(xuan)(xuan)浮流(liu)(liu)）依(yi)靠散(san)料(liao)的(de)(de)(de)料(liao)性(xing)(xing)和流(liu)(liu)動(dong)性(xing)(xing)存(cun)在(zai)。密相(xiang)(xiang)(xiang)(xiang)輸(shu)(shu)(shu)(shu)送(song)(song)(song)同(tong)樣也能(neng)被定義為(wei)輸(shu)(shu)(shu)(shu)送(song)(song)(song)物料(liao)完全填(tian)(tian)滿(man)管(guan)道截(jie)面的(de)(de)(de)一種(zhong)輸(shu)(shu)(shu)(shu)送(song)(song)(song)方式(shi)(shi)(shi)。稀(xi)相(xiang)(xiang)(xiang)(xiang)輸(shu)(shu)(shu)(shu)送(song)(song)(song)通(tong)常需要使用大量(liang)的(de)(de)(de)高速氣(qi)(qi)體。氣(qi)(qi)流(liu)(liu)依(yi)靠升力(li)和推動(dong)力(li)以(yi)離散(san)粒子的(de)(de)(de)形式(shi)(shi)(shi)攜帶著物料(liao)。參考圖(tu)1中所述(shu)的(de)(de)(de)“懸(xuan)(xuan)浮流(liu)(liu)”，稀(xi)相(xiang)(xiang)(xiang)(xiang)系(xi)(xi)統通(tong)常是(shi)最為(wei)被廣泛應(ying)用的(de)(de)(de)氣(qi)(qi)力(li)輸(shu)(shu)(shu)(shu)送(song)(song)(song)系(xi)(xi)統。由于稀(xi)相(xiang)(xiang)(xiang)(xiang)系(xi)(xi)統設計的(de)(de)(de)相(xiang)(xiang)(xiang)(xiang)對(dui)簡單性(xing)(xing)，它們同(tong)時也被頻繁的(de)(de)(de)應(ying)用在(zai)工(gong)業領域。輸(shu)(shu)(shu)(shu)送(song)(song)(song)氣(qi)(qi)體的(de)(de)(de)速度(du)(du)減少到比保持粒子懸(xuan)(xuan)浮狀態(tai)(tai)的(de)(de)(de)臨界值更(geng)小(xiao)時，導致物料(liao)在(zai)輸(shu)(shu)(shu)(shu)送(song)(song)(song)管(guan)道的(de)(de)(de)橫截(jie)面形成(cheng)不均勻的(de)(de)(de)分布。臨界氣(qi)(qi)體速度(du)(du)被稱(cheng)為(wei)是(shi)水平輸(shu)(shu)(shu)(shu)送(song)(song)(song)的(de)(de)(de)跳躍速度(du)(du)，垂(chui)直(zhi)輸(shu)(shu)(shu)(shu)送(song)(song)(song)時堵塞。當水平管(guan)道中的(de)(de)(de)物料(liao)表面氣(qi)(qi)體速度(du)(du)低于突變(bian)速度(du)(du)時，輸(shu)(shu)(shu)(shu)送(song)(song)(song)將會(hui)(hui)以(yi)低流(liu)(liu)量(liang)通(tong)過管(guan)道橫截(jie)面的(de)(de)(de)上(shang)部，在(zai)管(guan)道的(de)(de)(de)剩(sheng)余(yu)部分以(yi)高濃度(du)(du)低速度(du)(du)的(de)(de)(de)形式(shi)(shi)(shi)填(tian)(tian)充。有(you)時沿管(guan)道的(de)(de)(de)橫截(jie)面會(hui)(hui)被填(tian)(tian)滿(man)，而有(you)時只是(shi)部分被填(tian)(tian)滿(man).

實際應用中, 按照氣力(li)驅動形式(shi)可(ke)以(yi)(yi)分(fen)(fen)為(wei)負壓(ya)和正(zheng)壓(ya)氣力(li)輸(shu)送(song), 在這兩種輸(shu)送(song)系統中, 根(gen)據(ju)流動狀態(tai)(tai)圖再區(qu)分(fen)(fen)分(fen)(fen)為(wei)稀相, 密相和流化(hua)態(tai)(tai)輸(shu)送(song)系統. 除此之外,根(gen)據(ju)喂料不同分(fen)(fen)為(wei)連續(xu)和批次輸(shu)送(song). 在高壓(ya)密相輸(shu)送(song)技術中常(chang)采用批次的(de)壓(ya)力(li)罐進行(xing)高壓(ya)輸(shu)送(song), 同時, 可(ke)以(yi)(yi)組合兩個(ge)壓(ya)力(li)罐設(she)計(ji)達到連續(xu)的(de)輸(shu)送(song).

密相氣力輸送特點:

● 用(yong)氣量小, 節能(neng)

● 無殘留輸(shu)送

● 不堵(du)塞, 運行可靠

● 維護費用(yong)低

● 適合于(yu)各類粉(fen)粒物(wu)料

● 壓力至0. 6m p a可(ke)調(diao)

● 適合于柔性化自(zi)動生產中(zhong)的物料高效輸送