密相氣力輸送系(xi)列(lie)

氣力(li)輸送原(yuan)理

氣(qi)(qi)力輸送(song)(song)系統可(ke)分(fen)(fen)類為(wei)(wei)不同的(de)(de)流(liu)動型(xing)式，其(qi)中(zhong)兩種(zhong)(zhong)主要型(xing)式是(shi)：(a) 稀(xi)相(xiang)輸送(song)(song)和(he)(he)（b）密(mi)相(xiang)輸送(song)(song)每種(zhong)(zhong)流(liu)動型(xing)式可(ke)按物(wu)料(liao)(liao)與空氣(qi)(qi)的(de)(de)流(liu)量(liang)比(bi)率大(da)小分(fen)(fen)類，其(qi)比(bi)率也被(bei)(bei)稱為(wei)(wei)“固氣(qi)(qi)比(bi)”： μ=ms/mf (1)許多(duo)稀(xi)相(xiang)的(de)(de)運(yun)行范圍為(wei)(wei)0＜μ＜15，而(er)密(mi)相(xiang)通(tong)常(chang)是(shi)μ＞15。圖(tu)(tu)1所(suo)示(shi)(shi)的(de)(de)是(shi)典型(xing)輸送(song)(song)狀(zhuang)態圖(tu)(tu)。稀(xi)相(xiang)輸送(song)(song)可(ke)以被(bei)(bei)認(ren)為(wei)(wei)是(shi)一(yi)種(zhong)(zhong)完(wan)全(quan)的(de)(de)懸浮(fu)流(liu)，而(er)密(mi)相(xiang)輸送(song)(song)通(tong)常(chang)被(bei)(bei)認(ren)為(wei)(wei)是(shi)非懸浮(fu)流(liu)。然(ran)而(er)，如圖(tu)(tu)1所(suo)示(shi)(shi)，許多(duo)不同種(zhong)(zhong)類的(de)(de)密(mi)相(xiang)（非懸浮(fu)流(liu)）依靠散(san)料(liao)(liao)的(de)(de)料(liao)(liao)性和(he)(he)流(liu)動性存(cun)在(zai)。密(mi)相(xiang)輸送(song)(song)同樣也能被(bei)(bei)定義為(wei)(wei)輸送(song)(song)物(wu)料(liao)(liao)完(wan)全(quan)填(tian)滿管(guan)(guan)(guan)道(dao)(dao)截(jie)面(mian)的(de)(de)一(yi)種(zhong)(zhong)輸送(song)(song)方式。稀(xi)相(xiang)輸送(song)(song)通(tong)常(chang)需要使用大(da)量(liang)的(de)(de)高速(su)(su)氣(qi)(qi)體(ti)。氣(qi)(qi)流(liu)依靠升力和(he)(he)推動力以離散(san)粒(li)子(zi)的(de)(de)形(xing)式攜帶著物(wu)料(liao)(liao)。參考圖(tu)(tu)1中(zhong)所(suo)述的(de)(de)“懸浮(fu)流(liu)”，稀(xi)相(xiang)系統通(tong)常(chang)是(shi)最為(wei)(wei)被(bei)(bei)廣泛應用的(de)(de)氣(qi)(qi)力輸送(song)(song)系統。由于稀(xi)相(xiang)系統設計的(de)(de)相(xiang)對簡單性，它(ta)們同時(shi)(shi)也被(bei)(bei)頻繁的(de)(de)應用在(zai)工業領域。輸送(song)(song)氣(qi)(qi)體(ti)的(de)(de)速(su)(su)度(du)(du)減少(shao)到比(bi)保持粒(li)子(zi)懸浮(fu)狀(zhuang)態的(de)(de)臨(lin)界(jie)值(zhi)更小時(shi)(shi)，導致(zhi)物(wu)料(liao)(liao)在(zai)輸送(song)(song)管(guan)(guan)(guan)道(dao)(dao)的(de)(de)橫(heng)截(jie)面(mian)形(xing)成(cheng)不均勻的(de)(de)分(fen)(fen)布。臨(lin)界(jie)氣(qi)(qi)體(ti)速(su)(su)度(du)(du)被(bei)(bei)稱為(wei)(wei)是(shi)水(shui)平輸送(song)(song)的(de)(de)跳躍速(su)(su)度(du)(du)，垂直輸送(song)(song)時(shi)(shi)堵塞。當水(shui)平管(guan)(guan)(guan)道(dao)(dao)中(zhong)的(de)(de)物(wu)料(liao)(liao)表(biao)面(mian)氣(qi)(qi)體(ti)速(su)(su)度(du)(du)低(di)(di)于突變(bian)速(su)(su)度(du)(du)時(shi)(shi)，輸送(song)(song)將會(hui)以低(di)(di)流(liu)量(liang)通(tong)過管(guan)(guan)(guan)道(dao)(dao)橫(heng)截(jie)面(mian)的(de)(de)上(shang)部(bu)，在(zai)管(guan)(guan)(guan)道(dao)(dao)的(de)(de)剩余部(bu)分(fen)(fen)以高濃度(du)(du)低(di)(di)速(su)(su)度(du)(du)的(de)(de)形(xing)式填(tian)充。有時(shi)(shi)沿管(guan)(guan)(guan)道(dao)(dao)的(de)(de)橫(heng)截(jie)面(mian)會(hui)被(bei)(bei)填(tian)滿，而(er)有時(shi)(shi)只(zhi)是(shi)部(bu)分(fen)(fen)被(bei)(bei)填(tian)滿.

實際(ji)應(ying)用中(zhong), 按照氣(qi)力(li)驅動形式可(ke)以分(fen)(fen)為負(fu)壓(ya)和(he)正壓(ya)氣(qi)力(li)輸(shu)(shu)送(song)(song)(song)(song)(song), 在這兩種輸(shu)(shu)送(song)(song)(song)(song)(song)系統(tong)中(zhong), 根據流(liu)動狀態(tai)圖(tu)再區分(fen)(fen)分(fen)(fen)為稀相, 密相和(he)流(liu)化(hua)態(tai)輸(shu)(shu)送(song)(song)(song)(song)(song)系統(tong). 除(chu)此之外,根據喂料不同分(fen)(fen)為連續(xu)和(he)批次輸(shu)(shu)送(song)(song)(song)(song)(song). 在高壓(ya)密相輸(shu)(shu)送(song)(song)(song)(song)(song)技術中(zhong)常采用批次的壓(ya)力(li)罐進行高壓(ya)輸(shu)(shu)送(song)(song)(song)(song)(song), 同時, 可(ke)以組合兩個壓(ya)力(li)罐設計達到連續(xu)的輸(shu)(shu)送(song)(song)(song)(song)(song).

密(mi)相氣力(li)輸(shu)送特點:

● 用氣量小(xiao), 節能

● 無(wu)殘留輸送

● 不堵塞, 運行(xing)可靠

● 維護費用低(di)

● 適(shi)合于各類(lei)粉(fen)粒(li)物料

● 壓力至0. 6m p a可調(diao)

● 適(shi)合于柔(rou)性化自動生產中的物料高效輸送