密(mi)相氣(qi)力輸送系列(lie)

氣力輸送原(yuan)理(li)

氣(qi)力(li)(li)輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)系(xi)(xi)統(tong)可分(fen)(fen)類為(wei)不(bu)同的(de)(de)流(liu)(liu)動(dong)(dong)型式(shi)，其(qi)中兩種主要型式(shi)是：(a) 稀(xi)相輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)和（b）密(mi)相輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)每種流(liu)(liu)動(dong)(dong)型式(shi)可按物(wu)料(liao)(liao)與空氣(qi)的(de)(de)流(liu)(liu)量比率(lv)大小分(fen)(fen)類，其(qi)比率(lv)也(ye)(ye)被(bei)(bei)稱為(wei)“固氣(qi)比”： μ=ms/mf (1)許多(duo)稀(xi)相的(de)(de)運行范圍(wei)為(wei)0＜μ＜15，而密(mi)相通常是μ＞15。圖(tu)1所示的(de)(de)是典型輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)狀態圖(tu)。稀(xi)相輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)可以(yi)被(bei)(bei)認為(wei)是一種完(wan)全的(de)(de)懸(xuan)浮(fu)(fu)流(liu)(liu)，而密(mi)相輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)通常被(bei)(bei)認為(wei)是非懸(xuan)浮(fu)(fu)流(liu)(liu)。然而，如圖(tu)1所示，許多(duo)不(bu)同種類的(de)(de)密(mi)相（非懸(xuan)浮(fu)(fu)流(liu)(liu)）依靠(kao)散料(liao)(liao)的(de)(de)料(liao)(liao)性(xing)(xing)和流(liu)(liu)動(dong)(dong)性(xing)(xing)存在(zai)(zai)。密(mi)相輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)同樣(yang)也(ye)(ye)能被(bei)(bei)定(ding)義(yi)為(wei)輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)物(wu)料(liao)(liao)完(wan)全填滿(man)管(guan)(guan)道(dao)截面的(de)(de)一種輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)方式(shi)。稀(xi)相輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)通常需(xu)要使(shi)用大量的(de)(de)高速(su)(su)氣(qi)體(ti)。氣(qi)流(liu)(liu)依靠(kao)升力(li)(li)和推動(dong)(dong)力(li)(li)以(yi)離散粒子(zi)的(de)(de)形式(shi)攜(xie)帶著物(wu)料(liao)(liao)。參(can)考(kao)圖(tu)1中所述的(de)(de)“懸(xuan)浮(fu)(fu)流(liu)(liu)”，稀(xi)相系(xi)(xi)統(tong)通常是最為(wei)被(bei)(bei)廣(guang)泛(fan)應用的(de)(de)氣(qi)力(li)(li)輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)系(xi)(xi)統(tong)。由于稀(xi)相系(xi)(xi)統(tong)設計的(de)(de)相對簡單性(xing)(xing)，它們同時(shi)(shi)也(ye)(ye)被(bei)(bei)頻繁(fan)的(de)(de)應用在(zai)(zai)工業領域。輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)氣(qi)體(ti)的(de)(de)速(su)(su)度(du)減少到(dao)比保持粒子(zi)懸(xuan)浮(fu)(fu)狀態的(de)(de)臨(lin)界(jie)值更小時(shi)(shi)，導(dao)致物(wu)料(liao)(liao)在(zai)(zai)輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)管(guan)(guan)道(dao)的(de)(de)橫(heng)截面形成不(bu)均勻的(de)(de)分(fen)(fen)布。臨(lin)界(jie)氣(qi)體(ti)速(su)(su)度(du)被(bei)(bei)稱為(wei)是水平(ping)輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)的(de)(de)跳(tiao)躍速(su)(su)度(du)，垂直輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)時(shi)(shi)堵塞。當水平(ping)管(guan)(guan)道(dao)中的(de)(de)物(wu)料(liao)(liao)表面氣(qi)體(ti)速(su)(su)度(du)低于突變速(su)(su)度(du)時(shi)(shi)，輸(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)將會(hui)以(yi)低流(liu)(liu)量通過管(guan)(guan)道(dao)橫(heng)截面的(de)(de)上部，在(zai)(zai)管(guan)(guan)道(dao)的(de)(de)剩余部分(fen)(fen)以(yi)高濃度(du)低速(su)(su)度(du)的(de)(de)形式(shi)填充。有(you)時(shi)(shi)沿(yan)管(guan)(guan)道(dao)的(de)(de)橫(heng)截面會(hui)被(bei)(bei)填滿(man)，而有(you)時(shi)(shi)只是部分(fen)(fen)被(bei)(bei)填滿(man).

實際應用中, 按照氣力驅動(dong)形式可(ke)(ke)以(yi)分為(wei)負壓(ya)和(he)正壓(ya)氣力輸(shu)(shu)送(song)(song)(song)(song), 在這(zhe)兩(liang)種(zhong)輸(shu)(shu)送(song)(song)(song)(song)系統中, 根據流動(dong)狀態圖再區(qu)分分為(wei)稀相, 密相和(he)流化(hua)態輸(shu)(shu)送(song)(song)(song)(song)系統. 除此之外,根據喂(wei)料(liao)不同分為(wei)連(lian)續(xu)和(he)批(pi)次(ci)輸(shu)(shu)送(song)(song)(song)(song). 在高壓(ya)密相輸(shu)(shu)送(song)(song)(song)(song)技(ji)術中常(chang)采(cai)用批(pi)次(ci)的壓(ya)力罐(guan)進(jin)行高壓(ya)輸(shu)(shu)送(song)(song)(song)(song), 同時(shi), 可(ke)(ke)以(yi)組合兩(liang)個壓(ya)力罐(guan)設計達(da)到連(lian)續(xu)的輸(shu)(shu)送(song)(song)(song)(song).

密相氣(qi)力輸送(song)特(te)點:

● 用氣量小, 節(jie)能

● 無(wu)殘留輸送

● 不堵塞, 運(yun)行(xing)可靠(kao)

● 維(wei)護費用低

● 適合于各(ge)類粉粒物料(liao)

● 壓力至0. 6m p a可調

● 適合于柔性化自動生(sheng)產中的物料高效輸送