ISSN:0009-286X    

DOI:10.1002/cite.330610902

出版商:WILEY‐VCH Verlag    

年代:1989

数据来源: WILEY

摘要:

AbstractHeat transfer from a rigid wall to gas‐solid particulate systems.Considerable progress made in the last twenty years now permits a better understanding of heat transfer between a rigid wall and gas/solid particulate systems. The following paper reviews this progress. The heat transfer from a rigid wall to fixed, agitated, and fluidized beds as well as to fixed beds with fluid flow is discussed, and an example of indirect cooling of high‐capacity computers is given. In modelling, the concept of a contact and a penetration resistance in series is applied. The physical significance and the calculation of these resistances are discus

ISSN:0009-286X    

DOI:10.1002/cite.330610903

出版商:WILEY‐VCH Verlag    

年代:1989

数据来源: WILEY

摘要:

AbstractCombination of thickener and continual pressure filter to improve solid/liquid separation processes.The fundamental concept of the proposed process combination, which basically entails a division of the whole solid/liquid separation stage into sub‐stages, is presented. The influence of the suspension's concentration on the formation and dewatering of filter cakes under ideal conditions is then discussed, after which possible deviations of the product from the ideal behaviour are described along with their influence on the process results. Actual engineering conditions are then considered, and the consequences of a suspension pre‐thickening for the results of a drum filter are demonstrated. The conditions necessary for satisfactory results are discussed. Based on the results of conventional filtration, the further increase in filter efficiency occurring on avoiding the conventionally unavoidable gas throughput by a new process is explained. Finally a conceivable combination of apparatus for performing the described process is sketc

ISSN:0009-286X    

DOI:10.1002/cite.330610904

出版商:WILEY‐VCH Verlag    

年代:1989

数据来源: WILEY

摘要:

AbstractHeating and cooling‐chemical engineering aspects.This paper reviews the commonest types of heat exchangers and their applications. They are classified in the following types: tube bundle heat exchangers, plate heat exchangers, spiral heat exchangers, lamella heat exchangers, and heat exchangers for special purposes. Most of these apparatus can be used for heat exchange between single phases or for condensation or boiling of substances. The different criteria determining the choice of heat exchanger are explaine

ISSN:0009-286X    

DOI:10.1002/cite.330610905

出版商:WILEY‐VCH Verlag    

年代:1989

数据来源: WILEY

摘要:

AbstractPrinciples of formation and stability of emulsions.The present state of knowledge concerning the principles of emulsion formation and stability are summarised and new theoretical and experimental results are presented. Also described are the characteristic features of the most common types of machines used for emulsification and the mechanics of droplet disruption in laminar and turbulent flow as well as cavitation. In laminar flow, the minimum droplet size is theoretically determined by the shear stress and regulated by a critical Weber number, provided that the particular emulsifier can rapidly occupy sites on the newly formed interface. If this occupation is inhibited, than only larger droplets can be formed. The upper size limit can be calculated from kinetic considerations. The second part of the paper addresses the fundamentals of emulsion stability and the emulsifier's influence on interactions between dispersed droplets. A way of describing the state of the droplets in an emulsion at rest using a population balance theory is also discussed.

ISSN:0009-286X    

DOI:10.1002/cite.330610906

出版商:WILEY‐VCH Verlag    

年代:1989

数据来源: WILEY

ISSN:0009-286X    

DOI:10.1002/cite.330610907

出版商:WILEY‐VCH Verlag    

年代:1989

数据来源: WILEY

ISSN:0009-286X    

DOI:10.1002/cite.330610908

出版商:WILEY‐VCH Verlag    

年代:1989

数据来源: WILEY

ISSN:0009-286X    

DOI:10.1002/cite.330610909

出版商:WILEY‐VCH Verlag    

年代:1989

数据来源: WILEY

ISSN:0009-286X    

DOI:10.1002/cite.330610910

出版商:WILEY‐VCH Verlag    

年代:1989

数据来源: WILEY

ISSN:0009-286X    

DOI:10.1002/cite.330610911

出版商:WILEY‐VCH Verlag    

年代:1989

数据来源: WILEY