负压气力输送是一种常用的粉体物料输送方式，它适用于各种粉体、颗粒、纤维状物料的输送。负压气力输送的工作原(yuan)理是利(li)用(yong)气(qi)流把物(wu)料(liao)从一个输送(song)点(dian)传到另一个输送(song)点(dian)，通过控(kong)制气(qi)流来控(kong)制物(wu)料(liao)的输送(song)量(liang)和速度。

在实际应用(yong)中，负压气(qi)力输(shu)(shu)送(song)(song)(song)的(de)(de)输(shu)(shu)送(song)(song)(song)高(gao)(gao)度(du)取决于很多因素，如(ru)物(wu)料的(de)(de)性质、输(shu)(shu)送(song)(song)(song)距离、输(shu)(shu)送(song)(song)(song)管道(dao)的(de)(de)直径、气(qi)流速度(du)等(deng)。一般来说，对(dui)于一些(xie)较(jiao)轻的(de)(de)物(wu)料，如(ru)水泥(ni)、石灰(hui)等(deng)，负压气(qi)力输(shu)(shu)送(song)(song)(song)的(de)(de)输(shu)(shu)送(song)(song)(song)高(gao)(gao)度(du)可以达到50米甚(shen)至(zhi)更高(gao)(gao)。但对(dui)于一些(xie)比较(jiao)重的(de)(de)物(wu)料，如(ru)钙粉、锅炉(lu)灰(hui)等(deng)，由于其密(mi)度(du)较(jiao)大，其输(shu)(shu)送(song)(song)(song)高(gao)(gao)度(du)相对(dui)较(jiao)低，一般为10-15米左右。

此外，还需注意的是，在负压输送中，输送(song)(song)(song)(song)(song)高(gao)度越(yue)高(gao)，对输送(song)(song)(song)(song)(song)气(qi)流(liu)(liu)的(de)要求(qiu)就越(yue)高(gao)，输送(song)(song)(song)(song)(song)阻力(li)也越(yue)大，需要增加压(ya)缩(suo)空气(qi)的(de)流(liu)(liu)量和(he)压(ya)力(li)，这样既会(hui)增加能耗，又会(hui)增加设备成本。因此(ci)，在实际(ji)应用中，需要对物料的(de)性质(zhi)、输送(song)(song)(song)(song)(song)距离、输送(song)(song)(song)(song)(song)管道的(de)直径等进行综合考虑，以确定(ding)合适的(de)输送(song)(song)(song)(song)(song)高(gao)度和(he)输送(song)(song)(song)(song)(song)方式，从(cong)而实现节能的(de)物料输送(song)(song)(song)(song)(song)。