密相氣力輸送系列

氣力(li)輸(shu)送原理

氣(qi)(qi)力(li)輸(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)系(xi)統(tong)(tong)可(ke)分(fen)類(lei)為不(bu)同的(de)(de)流(liu)動型(xing)式(shi)，其中兩種(zhong)主要型(xing)式(shi)是：(a) 稀(xi)(xi)(xi)(xi)相(xiang)(xiang)輸(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)和(he)（b）密(mi)相(xiang)(xiang)輸(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)每種(zhong)流(liu)動型(xing)式(shi)可(ke)按物(wu)(wu)料(liao)與空氣(qi)(qi)的(de)(de)流(liu)量比率大小分(fen)類(lei)，其比率也被稱為“固氣(qi)(qi)比”： μ=ms/mf (1)許(xu)多稀(xi)(xi)(xi)(xi)相(xiang)(xiang)的(de)(de)運行范圍為0＜μ＜15，而(er)密(mi)相(xiang)(xiang)通常(chang)(chang)是μ＞15。圖1所(suo)(suo)示(shi)的(de)(de)是典(dian)型(xing)輸(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)狀(zhuang)態(tai)圖。稀(xi)(xi)(xi)(xi)相(xiang)(xiang)輸(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)可(ke)以(yi)被認(ren)為是一種(zhong)完(wan)(wan)全的(de)(de)懸浮流(liu)，而(er)密(mi)相(xiang)(xiang)輸(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)通常(chang)(chang)被認(ren)為是非懸浮流(liu)。然而(er)，如圖1所(suo)(suo)示(shi)，許(xu)多不(bu)同種(zhong)類(lei)的(de)(de)密(mi)相(xiang)(xiang)（非懸浮流(liu)）依(yi)靠(kao)散料(liao)的(de)(de)料(liao)性(xing)和(he)流(liu)動性(xing)存在。密(mi)相(xiang)(xiang)輸(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)同樣也能被定義為輸(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)物(wu)(wu)料(liao)完(wan)(wan)全填(tian)滿管(guan)(guan)道截(jie)面(mian)的(de)(de)一種(zhong)輸(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)方式(shi)。稀(xi)(xi)(xi)(xi)相(xiang)(xiang)輸(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)通常(chang)(chang)需要使(shi)用(yong)大量的(de)(de)高(gao)速(su)(su)氣(qi)(qi)體(ti)。氣(qi)(qi)流(liu)依(yi)靠(kao)升(sheng)力(li)和(he)推動力(li)以(yi)離散粒(li)子的(de)(de)形式(shi)攜(xie)帶著物(wu)(wu)料(liao)。參考圖1中所(suo)(suo)述的(de)(de)“懸浮流(liu)”，稀(xi)(xi)(xi)(xi)相(xiang)(xiang)系(xi)統(tong)(tong)通常(chang)(chang)是最為被廣泛應(ying)用(yong)的(de)(de)氣(qi)(qi)力(li)輸(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)系(xi)統(tong)(tong)。由(you)于(yu)稀(xi)(xi)(xi)(xi)相(xiang)(xiang)系(xi)統(tong)(tong)設計的(de)(de)相(xiang)(xiang)對簡單性(xing)，它們(men)同時也被頻繁的(de)(de)應(ying)用(yong)在工業領(ling)域。輸(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)氣(qi)(qi)體(ti)的(de)(de)速(su)(su)度(du)減少(shao)到比保持粒(li)子懸浮狀(zhuang)態(tai)的(de)(de)臨界值更小時，導(dao)致(zhi)物(wu)(wu)料(liao)在輸(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)管(guan)(guan)道的(de)(de)橫(heng)截(jie)面(mian)形成不(bu)均勻的(de)(de)分(fen)布。臨界氣(qi)(qi)體(ti)速(su)(su)度(du)被稱為是水平輸(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)的(de)(de)跳躍速(su)(su)度(du)，垂(chui)直輸(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)時堵塞。當水平管(guan)(guan)道中的(de)(de)物(wu)(wu)料(liao)表面(mian)氣(qi)(qi)體(ti)速(su)(su)度(du)低于(yu)突變速(su)(su)度(du)時，輸(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)將會以(yi)低流(liu)量通過(guo)管(guan)(guan)道橫(heng)截(jie)面(mian)的(de)(de)上部，在管(guan)(guan)道的(de)(de)剩余部分(fen)以(yi)高(gao)濃(nong)度(du)低速(su)(su)度(du)的(de)(de)形式(shi)填(tian)充(chong)。有時沿管(guan)(guan)道的(de)(de)橫(heng)截(jie)面(mian)會被填(tian)滿，而(er)有時只(zhi)是部分(fen)被填(tian)滿.

實(shi)際應(ying)用(yong)中, 按照氣力(li)驅(qu)動形式(shi)可(ke)以分為(wei)負壓(ya)和(he)正壓(ya)氣力(li)輸(shu)(shu)送(song), 在(zai)(zai)這兩種輸(shu)(shu)送(song)系統中, 根據(ju)流動狀態圖再區分分為(wei)稀(xi)相(xiang), 密相(xiang)和(he)流化態輸(shu)(shu)送(song)系統. 除此之外(wai),根據(ju)喂料不同分為(wei)連續(xu)和(he)批次輸(shu)(shu)送(song). 在(zai)(zai)高壓(ya)密相(xiang)輸(shu)(shu)送(song)技術中常(chang)采用(yong)批次的壓(ya)力(li)罐進行高壓(ya)輸(shu)(shu)送(song), 同時, 可(ke)以組合(he)兩個壓(ya)力(li)罐設計達到連續(xu)的輸(shu)(shu)送(song).

密相氣力輸送特點:

● 用氣量小, 節能

● 無殘留輸送

● 不堵塞, 運(yun)行(xing)可靠

● 維護費用低

● 適合于(yu)各類粉粒物料

● 壓力至0. 6m p a可(ke)調(diao)

● 適合于柔性化自(zi)動生產中的物(wu)料高效輸送