密相氣力輸送系列(lie)

氣力輸送(song)原理

氣(qi)(qi)力(li)輸(shu)(shu)送(song)(song)(song)(song)系統可分(fen)類(lei)(lei)為(wei)(wei)不同(tong)的(de)(de)(de)流(liu)(liu)(liu)(liu)(liu)動型式(shi)，其中(zhong)兩種(zhong)主(zhu)要型式(shi)是(shi)：(a) 稀(xi)(xi)相(xiang)輸(shu)(shu)送(song)(song)(song)(song)和（b）密相(xiang)輸(shu)(shu)送(song)(song)(song)(song)每種(zhong)流(liu)(liu)(liu)(liu)(liu)動型式(shi)可按物(wu)(wu)料(liao)(liao)與空氣(qi)(qi)的(de)(de)(de)流(liu)(liu)(liu)(liu)(liu)量(liang)比率(lv)(lv)大(da)小(xiao)分(fen)類(lei)(lei)，其比率(lv)(lv)也(ye)(ye)被稱(cheng)為(wei)(wei)“固氣(qi)(qi)比”： μ=ms/mf (1)許多稀(xi)(xi)相(xiang)的(de)(de)(de)運行范圍為(wei)(wei)0＜μ＜15，而密相(xiang)通常是(shi)μ＞15。圖1所示的(de)(de)(de)是(shi)典型輸(shu)(shu)送(song)(song)(song)(song)狀態圖。稀(xi)(xi)相(xiang)輸(shu)(shu)送(song)(song)(song)(song)可以(yi)被認為(wei)(wei)是(shi)一(yi)種(zhong)完全的(de)(de)(de)懸(xuan)浮流(liu)(liu)(liu)(liu)(liu)，而密相(xiang)輸(shu)(shu)送(song)(song)(song)(song)通常被認為(wei)(wei)是(shi)非懸(xuan)浮流(liu)(liu)(liu)(liu)(liu)。然而，如圖1所示，許多不同(tong)種(zhong)類(lei)(lei)的(de)(de)(de)密相(xiang)（非懸(xuan)浮流(liu)(liu)(liu)(liu)(liu)）依(yi)靠散料(liao)(liao)的(de)(de)(de)料(liao)(liao)性(xing)和流(liu)(liu)(liu)(liu)(liu)動性(xing)存在。密相(xiang)輸(shu)(shu)送(song)(song)(song)(song)同(tong)樣也(ye)(ye)能被定義(yi)為(wei)(wei)輸(shu)(shu)送(song)(song)(song)(song)物(wu)(wu)料(liao)(liao)完全填(tian)(tian)滿管(guan)道(dao)截面的(de)(de)(de)一(yi)種(zhong)輸(shu)(shu)送(song)(song)(song)(song)方式(shi)。稀(xi)(xi)相(xiang)輸(shu)(shu)送(song)(song)(song)(song)通常需要使(shi)用大(da)量(liang)的(de)(de)(de)高速(su)氣(qi)(qi)體(ti)。氣(qi)(qi)流(liu)(liu)(liu)(liu)(liu)依(yi)靠升力(li)和推動力(li)以(yi)離散粒子(zi)的(de)(de)(de)形式(shi)攜帶(dai)著(zhu)物(wu)(wu)料(liao)(liao)。參考圖1中(zhong)所述的(de)(de)(de)“懸(xuan)浮流(liu)(liu)(liu)(liu)(liu)”，稀(xi)(xi)相(xiang)系統通常是(shi)最為(wei)(wei)被廣(guang)泛應(ying)(ying)用的(de)(de)(de)氣(qi)(qi)力(li)輸(shu)(shu)送(song)(song)(song)(song)系統。由于稀(xi)(xi)相(xiang)系統設(she)計的(de)(de)(de)相(xiang)對(dui)簡單性(xing)，它們同(tong)時(shi)也(ye)(ye)被頻繁的(de)(de)(de)應(ying)(ying)用在工(gong)業領域。輸(shu)(shu)送(song)(song)(song)(song)氣(qi)(qi)體(ti)的(de)(de)(de)速(su)度(du)(du)減少到比保(bao)持粒子(zi)懸(xuan)浮狀態的(de)(de)(de)臨界(jie)值(zhi)更小(xiao)時(shi)，導致物(wu)(wu)料(liao)(liao)在輸(shu)(shu)送(song)(song)(song)(song)管(guan)道(dao)的(de)(de)(de)橫(heng)截面形成不均勻(yun)的(de)(de)(de)分(fen)布(bu)。臨界(jie)氣(qi)(qi)體(ti)速(su)度(du)(du)被稱(cheng)為(wei)(wei)是(shi)水平輸(shu)(shu)送(song)(song)(song)(song)的(de)(de)(de)跳躍速(su)度(du)(du)，垂直(zhi)輸(shu)(shu)送(song)(song)(song)(song)時(shi)堵塞。當水平管(guan)道(dao)中(zhong)的(de)(de)(de)物(wu)(wu)料(liao)(liao)表面氣(qi)(qi)體(ti)速(su)度(du)(du)低(di)于突變速(su)度(du)(du)時(shi)，輸(shu)(shu)送(song)(song)(song)(song)將會以(yi)低(di)流(liu)(liu)(liu)(liu)(liu)量(liang)通過管(guan)道(dao)橫(heng)截面的(de)(de)(de)上部(bu)(bu)，在管(guan)道(dao)的(de)(de)(de)剩余部(bu)(bu)分(fen)以(yi)高濃度(du)(du)低(di)速(su)度(du)(du)的(de)(de)(de)形式(shi)填(tian)(tian)充(chong)。有時(shi)沿管(guan)道(dao)的(de)(de)(de)橫(heng)截面會被填(tian)(tian)滿，而有時(shi)只(zhi)是(shi)部(bu)(bu)分(fen)被填(tian)(tian)滿.

實際應用中, 按照氣力(li)驅動形式可以分(fen)為(wei)負壓(ya)(ya)(ya)(ya)和(he)(he)正壓(ya)(ya)(ya)(ya)氣力(li)輸(shu)送(song), 在這兩種輸(shu)送(song)系統(tong)中, 根據流(liu)動狀態(tai)圖再區分(fen)分(fen)為(wei)稀相, 密相和(he)(he)流(liu)化(hua)態(tai)輸(shu)送(song)系統(tong). 除此之(zhi)外(wai),根據喂料不同(tong)分(fen)為(wei)連(lian)續(xu)和(he)(he)批(pi)次輸(shu)送(song). 在高(gao)壓(ya)(ya)(ya)(ya)密相輸(shu)送(song)技(ji)術中常(chang)采(cai)用批(pi)次的壓(ya)(ya)(ya)(ya)力(li)罐進行高(gao)壓(ya)(ya)(ya)(ya)輸(shu)送(song), 同(tong)時(shi), 可以組(zu)合(he)兩個壓(ya)(ya)(ya)(ya)力(li)罐設計達到連(lian)續(xu)的輸(shu)送(song).

密(mi)相氣(qi)力輸送特(te)點:

● 用氣量小(xiao), 節能

● 無殘留輸送

● 不(bu)堵塞, 運(yun)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(ke)調

● 適合于(yu)柔性化自動生產中的物(wu)料高效輸(shu)送