摘要:

A comparison made between spouted-bed and two-impinging-streams reactors proved the superiority of the-impinging-streams dryer The latter device exhibited, on the one hand, relatively small energy requirements for pumping the phases through the reactor and, on the other hand, improved drying characteristics Thus the two-imping-streams reactor is recommended as a useful device for drying operations

ISSN:0737-3937    

DOI:10.1080/07373938908916586

出版商:Taylor & Francis Group    

年代:1989

数据来源: Taylor

摘要:

The thin-layer drying of corn was analyzed in tern of Fick⢙s second law for diffusion. For spherical kernels (sphericity 0.98) Fick's law for diffusion out of a sphere was found appropriate model experimental drying curves. The diffusion coefficients deter mined by mans of this equation and corrected by the square of the s~hericity were taken as the intrinsic diffusivities of corn grain. Dent kernels were modeled by means of Fick's law assuming three different geometries: sphere, ellipsoid and parallelopiped. It was found that although the “Fickian” model describes reasonably well theexperimntal drying curves in the three cases, the diffusion coefficients obtained from the sphere differ mkedly from those corresponding to the parallelopipd and ellipsoid. For these last two geometries the diffusion coefficients practically agree with the intrinsic diffusivities obtained for spherical kernels

ISSN:0737-3937    

DOI:10.1080/07373938908916587

出版商:Taylor & Francis Group    

年代:1989

数据来源: Taylor

摘要:

This paper reports on the available experimental and analytical studies on a relatively novel flash drying configuration involving use of jets impinging against each other. The impingement zone provides ideal conditions for highly enhanced heat and mass transfer from particles or droplets to the gas stream. Repeated particle penetration into the opposite jet stream allows longer residence times in the impingement zone to accomplish desired drying. The collisions of the particles also permit breakage of lumps and better drying even for poly disperse materials. Advantages and limitations of this concept are discussed along with a discussion of some industrial applications

ISSN:0737-3937    

DOI:10.1080/07373938908916588

出版商:Taylor & Francis Group    

年代:1989

数据来源: Taylor

摘要:

An integral equation approach was recommended for modelling and simulation of heat and mass transfer processes. It was shown that several mixing models that have been dealt with up to now dlfferently, can be unified in a single integral equation. An effective numerical method was developed for the solution of non-linear integral equation. A construction method for the source and kernel functions were lntroduced in connection with the simulation and control of heat treatlng processes taking place in tunnel kiln and heat and mass transfer processes in tunnel dryer.

ISSN:0737-3937    

DOI:10.1080/07373938908916589

出版商:Taylor & Francis Group    

年代:1989

数据来源: Taylor

ISSN:0737-3937    

DOI:10.1080/07373938908916590

出版商:Taylor & Francis Group    

年代:1989

数据来源: Taylor

摘要:

A survey has been made of r6cent R& D activities in drying of solids in the People's Republic of China. Overall, the interest level appears to be rising in view of the increase in industrial development in the chemical, food, and other industries. Synopses are provided of selected recent publications

ISSN:0737-3937    

DOI:10.1080/07373938908916591

出版商:Taylor & Francis Group    

年代:1989

数据来源: Taylor

摘要:

This paper provides general information on drying R 6D activities in Czechoslovakia. This survey report lists the main topics in drying according to individual industrial sectors in which drying plays an important role. Drying R 6D carried out in Czechoslovak Universities is also cited. The paper includes an extensive list of references, mainly proceedings of national drying conferences, symposia, and meetings

ISSN:0737-3937    

DOI:10.1080/07373938908916592

出版商:Taylor & Francis Group    

年代:1989

数据来源: Taylor

ISSN:0737-3937    

DOI:10.1080/07373938908916593

出版商:Taylor & Francis Group    

年代:1989

数据来源: Taylor

ISSN:0737-3937    

DOI:10.1080/07373938908916594

出版商:Taylor & Francis Group    

年代:1989

数据来源: Taylor

ISSN:0737-3937    

DOI:10.1080/07373938908916595

出版商:Taylor & Francis Group    

年代:1989

数据来源: Taylor