真空辊的优化设计及应用

真空辊是造纸机上的主要脱水元件之一，用于网部和压榨部，能提高脱水效率，提高进干燥部纸的于度，降低干燥部的汽耗。真空辊的脱水过程：利用真空辊真空室产生的负压抽吸纸页或压榨部毛布上的水，然后通过辊体上的孔眼吸入真空室，最后通过真空辊操作侧的真空抽吸管排出。

压榨部织物专用化学清洗方案

介绍压榨毛布的化学清洗方案,叙述了高压、润滑和化学喷淋水管的安装和使用,化学清洗使用的药品搭配,以及化学清洗的方式方法。

Pressure drop of the film-enlarged tube bundles in air-water two-phase cross flow in evaporative air cooler

An experiment was carried out to investigate the relation of the maximum velocity of air passing through narrowest passage, mass flux of spray water in one square meter in one hour and the pressure drop of tube bundles. Twelve equations were obtained for the relation. The results show that the pressure drop of the tube bundles increases with increase of the maximum velocity of air and the mass flux of spray water. Comparing the pressure drop of the bare tube bundles with that of the film-enhanced tube bundles, it is found that the pressure drop of the film-enhanced tube bundles is lower about 11% and the surface roughness of the film-enhanced plates is a main factor that influences the pressure drop. The data and method obtained in the paper can be used to compute the pressure drop of the film-enhanced tube bundles and is helpful for selection of fan.