Reducing shock loads in automatic pipeline equipment control

1999 ◽  
Vol 35 (1) ◽  
pp. 50-51
Author(s):  
V. M. Krasil'shchikov
2016 ◽  
Vol 21 (4) ◽  
pp. 50-60 ◽  
Author(s):  
V.I. Surin ◽  
Z.S. Volkova ◽  
R.A. Denisov ◽  
V.D. Motovilin ◽  
N.V. Rhine
Keyword(s):  

1997 ◽  
Vol 35 (8) ◽  
pp. 145-152 ◽  
Author(s):  
T. Panswad ◽  
L. Komolmethee

This research was to determine the effects of hydraulic shock loads by intermittent feeding on the removal efficiency of a small prefabricated real-sized septic tank/anaerobic filter unit. Besides the ‘control’ 24-hour continuous runs the other twice a day feeding periods covered 16, 12 and 8 hours per day, with the tank's retention time varying from 22.5 to 90 hours. It was demonstrated that the variation of the hydraulic feeding patterns ranging from 24-hour continuous feed to 8 h per day intermittent feed did not affect the performance of the system much. The percentage of BOD reduction was decreased from 85 to 82 and 81 percent for the feed times of 24, 16 and 8 hours per day, respectively. The tank capacity played a relatively major role in determining the removal efficiency of the process. The efficiency of BOD and SS reduction dwindled from 82.2 to 68.9 and 56.0% with the corresponding reduction in tank sizes from 90 to 45 and 22.5 hours retention, respectively. In any event, the unit could not satisfactorily remove nutrients. A retention period of not less than 48 hours is recommended if the Thai effluent standards are to be met. Equations for predicting the BOD removal capability were also developed.


2012 ◽  
Vol 490-495 ◽  
pp. 2286-2289
Author(s):  
Jun Han ◽  
Rui Li Chang

Being established in the requirement of teaching and practice, and connecting to the development of process equipment and control engineering specialty, a suit of experiment teaching instrument is designed, which relates to process control, automation, survey and control and correlative specialties. By the instrument, students can taste the actualizing of process equipment control and the application of advanced technology when learning engineering theory. This stimulates their enthusiasm in specialty courses study and enhances their practice capability and creative thinking


2012 ◽  
Author(s):  
Rick L. Giunta ◽  
Cam Van Le ◽  
Martin F. Schoener-Scott ◽  
Ryan Neal Anderson ◽  
Joshua Monroe Glass

Author(s):  
Michail Mamalakis ◽  
Pankaj Garg ◽  
Tom Nelson ◽  
Justin Lee ◽  
Jim M. Wild ◽  
...  

2019 ◽  
Vol 14 (03) ◽  
pp. 87-91
Author(s):  
F. Haas ◽  
U. Kaulbars

Hand-Arm-Vibrationseinwirkungen durch Einzelstöße sind ein Phänomen, das aus der Berufswelt bekannt und im Bereich der Hand-Arm-Vibrationen angesiedelt ist. Beispielsweise sind Arbeiten mit schlagenden Geräten wie Bolzensetzern und Druckluftnaglern mit stoßartigen Belastungen des Hand-Arm-Systems verbunden. Auch im Freizeitbereich lassen sich stoßartige Belastungen des Hand-Arm-Systems beobachten. Typische Freizeitaktivitäten, in denen stoßartige Belastungen auf das Hand-Arm-System erfolgen, sind z. B. Tennis, Golf oder Squash. Am Beispiel der Freizeitaktivität Golf untersuchte das Institut für Arbeitsschutz der Deutschen Gesetzlichen Unfallversicherung (IFA) die Hand-Arm-Vibrationseinwirkungen durch Einzelstöße im Freizeitbereich.   Single-impact hand-arm vibration is a phenomenon well known in the world of work and in the area of hand-arm vibration. For example, work with beating devices such as bolt makers and pneumatic nailers are associated with shock loads on the hand-arm system. Even in the leisure sector can be observed shock loads of the hand-arm system. Typical recreational activities in which shock loads on the hand-arm system take place, for. As tennis, golf or squash. Using the example of leisure activity Golf, the Institute for Occupational Safety of the German Social Accident Insurance (IFA) examined the hand-arm vibration effects caused by individual impacts in the leisure sector.


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