密相气(qi)力(li)输送系列(lie)

气(qi)力输送原理

气(qi)力输(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)系统可(ke)分(fen)类(lei)(lei)为不同(tong)的(de)(de)(de)(de)(de)流(liu)动(dong)(dong)型式(shi)(shi)，其中两种(zhong)主(zhu)要型式(shi)(shi)是(shi)：(a) 稀(xi)相(xiang)(xiang)(xiang)输(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)和(he)(he)（b）密(mi)相(xiang)(xiang)(xiang)输(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)每种(zhong)流(liu)动(dong)(dong)型式(shi)(shi)可(ke)按物(wu)(wu)料(liao)(liao)与(yu)空气(qi)的(de)(de)(de)(de)(de)流(liu)量比(bi)率大小分(fen)类(lei)(lei)，其比(bi)率也(ye)被(bei)称为“固气(qi)比(bi)”： μ=ms/mf (1)许多稀(xi)相(xiang)(xiang)(xiang)的(de)(de)(de)(de)(de)运行范围(wei)为0＜μ＜15，而(er)密(mi)相(xiang)(xiang)(xiang)通(tong)(tong)(tong)(tong)常(chang)是(shi)μ＞15。图(tu)(tu)1所(suo)(suo)示的(de)(de)(de)(de)(de)是(shi)典型输(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)状态(tai)图(tu)(tu)。稀(xi)相(xiang)(xiang)(xiang)输(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)可(ke)以(yi)被(bei)认为是(shi)一种(zhong)完全的(de)(de)(de)(de)(de)悬浮(fu)(fu)流(liu)，而(er)密(mi)相(xiang)(xiang)(xiang)输(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)通(tong)(tong)(tong)(tong)常(chang)被(bei)认为是(shi)非悬浮(fu)(fu)流(liu)。然而(er)，如图(tu)(tu)1所(suo)(suo)示，许多不同(tong)种(zhong)类(lei)(lei)的(de)(de)(de)(de)(de)密(mi)相(xiang)(xiang)(xiang)（非悬浮(fu)(fu)流(liu)）依(yi)靠(kao)散(san)料(liao)(liao)的(de)(de)(de)(de)(de)料(liao)(liao)性和(he)(he)流(liu)动(dong)(dong)性存在。密(mi)相(xiang)(xiang)(xiang)输(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)同(tong)样也(ye)能(neng)被(bei)定义为输(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)物(wu)(wu)料(liao)(liao)完全填满(man)(man)管(guan)(guan)道截(jie)面(mian)的(de)(de)(de)(de)(de)一种(zhong)输(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)方式(shi)(shi)。稀(xi)相(xiang)(xiang)(xiang)输(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)通(tong)(tong)(tong)(tong)常(chang)需要使用(yong)大量的(de)(de)(de)(de)(de)高速(su)(su)(su)气(qi)体。气(qi)流(liu)依(yi)靠(kao)升力和(he)(he)推动(dong)(dong)力以(yi)离散(san)粒(li)子(zi)的(de)(de)(de)(de)(de)形(xing)(xing)式(shi)(shi)携带着(zhe)物(wu)(wu)料(liao)(liao)。参考图(tu)(tu)1中所(suo)(suo)述的(de)(de)(de)(de)(de)“悬浮(fu)(fu)流(liu)”，稀(xi)相(xiang)(xiang)(xiang)系统通(tong)(tong)(tong)(tong)常(chang)是(shi)最为被(bei)广泛应用(yong)的(de)(de)(de)(de)(de)气(qi)力输(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)系统。由于稀(xi)相(xiang)(xiang)(xiang)系统设计的(de)(de)(de)(de)(de)相(xiang)(xiang)(xiang)对简单性，它们同(tong)时(shi)(shi)(shi)也(ye)被(bei)频(pin)繁的(de)(de)(de)(de)(de)应用(yong)在工业(ye)领(ling)域(yu)。输(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)气(qi)体的(de)(de)(de)(de)(de)速(su)(su)(su)度(du)(du)减少(shao)到比(bi)保持(chi)粒(li)子(zi)悬浮(fu)(fu)状态(tai)的(de)(de)(de)(de)(de)临界值更小时(shi)(shi)(shi)，导致物(wu)(wu)料(liao)(liao)在输(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)管(guan)(guan)道的(de)(de)(de)(de)(de)横(heng)截(jie)面(mian)形(xing)(xing)成不均(jun)匀的(de)(de)(de)(de)(de)分(fen)布。临界气(qi)体速(su)(su)(su)度(du)(du)被(bei)称为是(shi)水(shui)平(ping)输(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)的(de)(de)(de)(de)(de)跳(tiao)跃(yue)速(su)(su)(su)度(du)(du)，垂直输(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)时(shi)(shi)(shi)堵塞。当水(shui)平(ping)管(guan)(guan)道中的(de)(de)(de)(de)(de)物(wu)(wu)料(liao)(liao)表(biao)面(mian)气(qi)体速(su)(su)(su)度(du)(du)低(di)于突(tu)变(bian)速(su)(su)(su)度(du)(du)时(shi)(shi)(shi)，输(shu)(shu)(shu)(shu)(shu)送(song)(song)(song)(song)(song)(song)将会以(yi)低(di)流(liu)量通(tong)(tong)(tong)(tong)过管(guan)(guan)道横(heng)截(jie)面(mian)的(de)(de)(de)(de)(de)上(shang)部(bu)(bu)，在管(guan)(guan)道的(de)(de)(de)(de)(de)剩(sheng)余部(bu)(bu)分(fen)以(yi)高浓(nong)度(du)(du)低(di)速(su)(su)(su)度(du)(du)的(de)(de)(de)(de)(de)形(xing)(xing)式(shi)(shi)填充(chong)。有时(shi)(shi)(shi)沿管(guan)(guan)道的(de)(de)(de)(de)(de)横(heng)截(jie)面(mian)会被(bei)填满(man)(man)，而(er)有时(shi)(shi)(shi)只(zhi)是(shi)部(bu)(bu)分(fen)被(bei)填满(man)(man).

实际应(ying)用(yong)中(zhong), 按照气力(li)(li)驱(qu)动(dong)形式可以分为负压(ya)(ya)和(he)正压(ya)(ya)气力(li)(li)输(shu)(shu)送(song), 在这两(liang)种输(shu)(shu)送(song)系(xi)统中(zhong), 根据流动(dong)状态图(tu)再(zai)区分分为稀相, 密相和(he)流化(hua)态输(shu)(shu)送(song)系(xi)统. 除此之外,根据喂料不同分为连续和(he)批次(ci)输(shu)(shu)送(song). 在高(gao)压(ya)(ya)密相输(shu)(shu)送(song)技术中(zhong)常(chang)采用(yong)批次(ci)的(de)压(ya)(ya)力(li)(li)罐进行高(gao)压(ya)(ya)输(shu)(shu)送(song), 同时, 可以组合两(liang)个(ge)压(ya)(ya)力(li)(li)罐设(she)计(ji)达到(dao)连续的(de)输(shu)(shu)送(song).

密相气力(li)输送(song)特点:

● 用气量小, 节能

● 无(wu)残留输送(song)

● 不堵塞, 运行可靠(kao)

● 维护费用低

● 适合于(yu)各类粉粒物料

● 压力(li)至0. 6m p a可(ke)调

● 适合(he)于柔性化自动生(sheng)产(chan)中的物(wu)料高效(xiao)输送(song)