密相氣力輸送系列

氣力輸送原(yuan)理

氣力(li)(li)輸(shu)(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)系(xi)(xi)統(tong)(tong)可分(fen)類為(wei)(wei)不同的(de)(de)(de)(de)(de)流(liu)動型(xing)式(shi)(shi)(shi)，其中(zhong)兩種主(zhu)要(yao)型(xing)式(shi)(shi)(shi)是：(a) 稀(xi)相(xiang)輸(shu)(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)和（b）密(mi)相(xiang)輸(shu)(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)每種流(liu)動型(xing)式(shi)(shi)(shi)可按物料(liao)(liao)(liao)與(yu)空(kong)氣的(de)(de)(de)(de)(de)流(liu)量比(bi)率(lv)大(da)小(xiao)分(fen)類，其比(bi)率(lv)也被稱(cheng)為(wei)(wei)“固氣比(bi)”： μ=ms/mf (1)許(xu)多稀(xi)相(xiang)的(de)(de)(de)(de)(de)運行范圍為(wei)(wei)0＜μ＜15，而(er)(er)(er)密(mi)相(xiang)通常是μ＞15。圖(tu)1所示(shi)的(de)(de)(de)(de)(de)是典型(xing)輸(shu)(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)狀(zhuang)態(tai)圖(tu)。稀(xi)相(xiang)輸(shu)(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)可以(yi)被認(ren)(ren)為(wei)(wei)是一種完(wan)全的(de)(de)(de)(de)(de)懸浮流(liu)，而(er)(er)(er)密(mi)相(xiang)輸(shu)(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)通常被認(ren)(ren)為(wei)(wei)是非懸浮流(liu)。然而(er)(er)(er)，如圖(tu)1所示(shi)，許(xu)多不同種類的(de)(de)(de)(de)(de)密(mi)相(xiang)（非懸浮流(liu)）依靠(kao)散料(liao)(liao)(liao)的(de)(de)(de)(de)(de)料(liao)(liao)(liao)性(xing)和流(liu)動性(xing)存在(zai)(zai)。密(mi)相(xiang)輸(shu)(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)同樣也能被定義(yi)為(wei)(wei)輸(shu)(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)物料(liao)(liao)(liao)完(wan)全填(tian)滿管(guan)道(dao)(dao)(dao)(dao)截(jie)(jie)面的(de)(de)(de)(de)(de)一種輸(shu)(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)方式(shi)(shi)(shi)。稀(xi)相(xiang)輸(shu)(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)通常需要(yao)使用(yong)大(da)量的(de)(de)(de)(de)(de)高速(su)氣體(ti)。氣流(liu)依靠(kao)升力(li)(li)和推動力(li)(li)以(yi)離散粒(li)子的(de)(de)(de)(de)(de)形(xing)式(shi)(shi)(shi)攜帶著物料(liao)(liao)(liao)。參考圖(tu)1中(zhong)所述的(de)(de)(de)(de)(de)“懸浮流(liu)”，稀(xi)相(xiang)系(xi)(xi)統(tong)(tong)通常是最(zui)為(wei)(wei)被廣泛應用(yong)的(de)(de)(de)(de)(de)氣力(li)(li)輸(shu)(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)系(xi)(xi)統(tong)(tong)。由(you)于稀(xi)相(xiang)系(xi)(xi)統(tong)(tong)設計的(de)(de)(de)(de)(de)相(xiang)對簡單性(xing)，它們同時也被頻繁的(de)(de)(de)(de)(de)應用(yong)在(zai)(zai)工業(ye)領域(yu)。輸(shu)(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)氣體(ti)的(de)(de)(de)(de)(de)速(su)度(du)(du)減(jian)少到比(bi)保持粒(li)子懸浮狀(zhuang)態(tai)的(de)(de)(de)(de)(de)臨界(jie)值更小(xiao)時，導致物料(liao)(liao)(liao)在(zai)(zai)輸(shu)(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)管(guan)道(dao)(dao)(dao)(dao)的(de)(de)(de)(de)(de)橫(heng)截(jie)(jie)面形(xing)成不均(jun)勻的(de)(de)(de)(de)(de)分(fen)布。臨界(jie)氣體(ti)速(su)度(du)(du)被稱(cheng)為(wei)(wei)是水平輸(shu)(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)的(de)(de)(de)(de)(de)跳躍速(su)度(du)(du)，垂直(zhi)輸(shu)(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)時堵塞。當水平管(guan)道(dao)(dao)(dao)(dao)中(zhong)的(de)(de)(de)(de)(de)物料(liao)(liao)(liao)表面氣體(ti)速(su)度(du)(du)低(di)于突(tu)變(bian)速(su)度(du)(du)時，輸(shu)(shu)(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)將會(hui)以(yi)低(di)流(liu)量通過(guo)管(guan)道(dao)(dao)(dao)(dao)橫(heng)截(jie)(jie)面的(de)(de)(de)(de)(de)上部，在(zai)(zai)管(guan)道(dao)(dao)(dao)(dao)的(de)(de)(de)(de)(de)剩余部分(fen)以(yi)高濃度(du)(du)低(di)速(su)度(du)(du)的(de)(de)(de)(de)(de)形(xing)式(shi)(shi)(shi)填(tian)充。有時沿管(guan)道(dao)(dao)(dao)(dao)的(de)(de)(de)(de)(de)橫(heng)截(jie)(jie)面會(hui)被填(tian)滿，而(er)(er)(er)有時只是部分(fen)被填(tian)滿.

實際應用中, 按(an)照氣(qi)力驅動形式可以分為(wei)負壓(ya)和正壓(ya)氣(qi)力輸(shu)送(song)(song), 在這兩(liang)(liang)種輸(shu)送(song)(song)系統中, 根據流(liu)(liu)動狀態(tai)圖(tu)再區分分為(wei)稀(xi)相(xiang), 密相(xiang)和流(liu)(liu)化態(tai)輸(shu)送(song)(song)系統. 除(chu)此(ci)之外(wai),根據喂料不(bu)同分為(wei)連續和批次輸(shu)送(song)(song). 在高(gao)壓(ya)密相(xiang)輸(shu)送(song)(song)技術中常采用批次的壓(ya)力罐進行高(gao)壓(ya)輸(shu)送(song)(song), 同時, 可以組合兩(liang)(liang)個(ge)壓(ya)力罐設計達到連續的輸(shu)送(song)(song).

密相氣力輸送特點(dian):

● 用(yong)氣量(liang)小, 節能

● 無(wu)殘(can)留輸送(song)

● 不堵塞, 運(yun)行可靠(kao)

● 維護費用(yong)低

● 適(shi)合于各類粉粒物料

● 壓力至0. 6m p a可調

● 適合于柔性(xing)化自動生產中的物料高效輸送