ISSN:0009-286X    

DOI:10.1002/cite.330700802

出版商:WILEY‐VCH Verlag    

年代:1998

数据来源: WILEY

ISSN:0009-286X    

DOI:10.1002/cite.330700803

出版商:WILEY‐VCH Verlag    

年代:1998

数据来源: WILEY

摘要:

AbstractProcess Control Engineering – Function and State of the Art of the SystemsOn considering material flow in a chemical engineering company it is possible to identify associated business processes whose support by appropriate information processing systems will permit efficient control of material flow and material conversion as production goal. Such consideration indicates not only the principal functions of information processing but also the necessary integration of process‐oriented information systems such as those relating to formulation, production planning, and operating data processing. Various concepts are currently under discussion for such integrat

ISSN:0009-286X    

DOI:10.1002/cite.330700804

出版商:WILEY‐VCH Verlag    

年代:1998

数据来源: WILEY

摘要:

AbstractDigital Field Devices and Their Importance for Maintenance of Chemical PlantThe term “digital field device” is briefly discussed in order to demonstrate the extent to which digitalization has created conditions for increased and “new” functionality in the field. The body of the article then classifies and describes this functionality according to elementary, shifted, and extended measuring functionality and maintenance functionality. The ensuing advantages and disadvantages for chemical plant maintenance are considered. The key role of communication in the field becomes very clear. An attempt is also made to present some future prospects for digital field

ISSN:0009-286X    

DOI:10.1002/cite.330700805

出版商:WILEY‐VCH Verlag    

年代:1998

数据来源: WILEY

摘要:

AbstractModelling of Binary Flow in Ordered Layers and Structured PackingsOrdered layers and structured packings are used as internals in numerous rectification columns. They characteristically exhibit low pressure drops and high plate numbers per unit length. The relatively high investment costs are frequently offset by small column dimensions and hence lower equipment costs. In packings of industrial dimensions unstable flow states may occur which significantly lower the plate numbers. Such instabilities can be detected experimentally by tomographic methods. Moreover, flow patterns can be predicted theoretically. A theoretical description permits the engineer to scale up such columns containing packings and to deduce the design features necessary for industrial scale columns from laboratory experiments.

ISSN:0009-286X    

DOI:10.1002/cite.330700806

出版商:WILEY‐VCH Verlag    

年代:1998

数据来源: WILEY

ISSN:0009-286X    

DOI:10.1002/cite.330700807

出版商:WILEY‐VCH Verlag    

年代:1998

数据来源: WILEY

ISSN:0009-286X    

DOI:10.1002/cite.330700808

出版商:WILEY‐VCH Verlag    

年代:1998

数据来源: WILEY

ISSN:0009-286X    

DOI:10.1002/cite.330700809

出版商:WILEY‐VCH Verlag    

年代:1998

数据来源: WILEY

ISSN:0009-286X    

DOI:10.1002/cite.330700810

出版商:WILEY‐VCH Verlag    

年代:1998

数据来源: WILEY

ISSN:0009-286X    

DOI:10.1002/cite.330700811

出版商:WILEY‐VCH Verlag    

年代:1998

数据来源: WILEY