摘要
真空带式干燥机(VBD)由干燥室、真空系统、布料机构、履带输送装置、切料机构、CIP清洗系统、PLC控制系统、加热和冷却系统以及卸料系统组成。干燥室内真空度为1 000—3 000 Pa,物料温度为30—60℃,适用于热敏及氧敏性物料的干燥,其传热方式为传导-辐射联合传热。目前有关真空带式干燥机干燥特性及传热传质机理的研究报导较少,难以指导工业设备的设计与生产,故而真空带式干燥机的设计主要是依靠经验,这使得其节能降耗的优势不能充分体现出来。真空带式干燥属于薄层干燥,文中综述了真空薄层干燥方面的一些研究文献,为真空带式干燥机的理论研究奠定了基础,以期研究者们进一步对真空带式干燥机的干燥特性及传热传质理论进行研究。
A vacuum belt dryer（VBD） consists of drying chamber,vacuum system,dosing system,belt transport device,product crusher,CIP system,PLC system,heating and cooling system,and discharge system.The vacuum degree in drying chamber is 1 000-3 000 Pa,material temperature is 30-60 ℃.This type of dryer is suitable for drying the materials sensitive to heat and oxygen.Its heat transfer is realized by conduction-radiation.At present,a few literatures on drying characteristics,heat and mass transfer mechanism are reported to direct the design and production of industrial equipment,so the design of VBD is based on experience,which can not bring its energy-saving advantage adequately.Vacuum belt drying belongs to thin layer drying.Many literatures on vacuum thin layer drying were summarized,which provides a basis for VBD drying investigation.Further study on the drying properties,heat and mass transfer of VBD drying are expected.
出处
《化学工程》
CAS
CSCD
北大核心
2012年第3期25-29,共5页
Chemical Engineering(China)
关键词
真空
带式
薄层模型
传导
辐射
vacuum belt thin layer model conduction radiation
