аэродинамика воздухоочистных устройств с зернистым слоем

312
A. S. Pushnov, P. Baltrėnas, A. M. Kagan, A. Zagorskis
THE AERODYNAMICS OF AIR TREATMENT DEVICES
WITH A GRANULAR CHARGE
Summary
The monograph discusses the present-day topic of aerodynamic processes in air
treatment devices with a granular charge.The monograph is written for researchers,
environmentalists and managers. It is also a valuable reference for doctoral and
postgraduate studies.
Introduction describes the areas of applying air treatment devices with granular
charging, the relevance of the topic, the characteristics of granular charges, the
methods employed for research on aerodynamic processes and the main results
obtained. Air treatment devices with granular charging have received a wide application
in the industries of chemistry, oil refining, textile and furniture as well
as in the sectors of energy, agriculture and other industrial enterprises. One of the
major requirements for charging an air treatment device is its low aerodynamic resistance
which depends on the humidity, fraction, form, porosity and other physical
properties of charging. Therefore, presently, active research on the methods of how
to improve sorptive and aerodynamic processes without reducing the air treatment
efficiency of devices is done. Increasingly stringent environmental requirements
encourage the investigations and introduction of new air treatment technologies and
charges in devices (Ardjmand et al. 2005; Arriaga et al. 2006; Baltrėnas, Paliulis
2002; Baltrėnas et al. 2001, 2004; Baltrėnas, Vaiškūnaitė 2003; Biofilter ... 2006,
2005; Bridžiuvienė et al. 1997; Cai et al. 2006; Canet et al. 2007; Chan 2006;
Chan, Chang 2006; Chan, Peng 2008; Chang, Lu 2003; Chen et al. 2004; Cheng,
Reinhard 2006). An irregular and unpredictable structure of granular charging has
an influence on the aerodynamic resistance of a device which conditions the time
of pollutant filtration and the air treatment efficiency of the device. The chapter
emphasises the novelty of the applied methods and research results. The obtained
results will allow identifying the distribution of gaseous flows in granular charging
and selecting appropriate structures of devices. It also presents a brief description
of the key factors determining aerodynamic resistance. Major attention is devoted
to modelling aerodynamic processes in granular charging.
The chapter describes in detail the practical value of research results and the
structure of the monograph. It also overviews the types and structure granular charges
used for air treatment as well as their physical characteristics having an influence
of the aerodynamic resistance of devices (Масштабный … 1980; Струминский
1978). The chapter presents the methods and laboratory stands used for research