Air cleaning equipment

The most common equipment for cleaning recirculated air from particles is fabric filters, mechanical collectors, electrostatic precipitators, and cleaners and wet collectors.For cleaning of recirculated air from gases, absorbers and adsorbers such as activated carbon, sometimes with impregnation for specific gases, and impregnated alumina are most common. The performance of different air cleaning equipment is described in many textbooks and handbooks. 

LVHV systems have disadvantages associated with installation costs, e.g., custom-made nozzles, expensive hose and duct, air-cleaning equipment, expensive... 

The blasting equipment and the air cleaning equipment may be placed outside or inside the room. 

Air cleaning equipment Equipment that removes airborne contaminants, either... 

Dilution of fumes in these areas is generally required for one of two reasons either to reduce the level of harmful (toxic or irritant) fumes to a safe level, normally below the OES (Occupational Exposure Standard) or to dilute offensive odors. Care must be taken with the latter to ensure that the problem is not merely passed on to neighbors. If it is, then a local extract with air-cleaning equipment will be preferred if it is practical. Indeed, a local extract system is always preferable, since it removes the problem at source, resulting in a cleaner environment within the building. 

Table 9-1 lists design features of the exposure chambers in the United States that have air-cleaning equipment. The facility at the University of Maryland Hospital, Baltimore, has a chamber with activated-charcoal and high-efficiency particle filters and controlled temperature and humidity. St. Vincent s Hospital and New York University, New York City, each have a clean-room facility. The University of Pennsylvania Hospital, Philadelphia, has a self-contained, reinforced-concrete... 

A summary of the operational characteristics of many types of air cleaning equipment has been made by Silverman (Si) and is reproduced in Table II. 

Scrubbing is a continuous operation and needs comparatively little plot area compared with a conventional AC system. It also has the advantages common to continuous plants in the way of control and the steady requirement of utilities. It lacks, however, the reserve of capacity inherent in an AC bed which, even when close to breakthrough, can absorb large amounts of solvent if a surge of solvent in air reaches it. This is likely to happen from time to time if a batch drier is upstream of the air cleaning equipment, which must be designed to cope with such a peak. 

The main types of air cleaning equipment are mechanical separators, filtration devices, wet collectors, electrostatic precipitators, gas adsorbers, and combustion incinerators. 

ISO 5011 2014 Inlet air cleaning equipment for internal combustion engines and compressors — Performance testing SAE J726 Air Cleaner Test Code JIS D 1612 Test methods of air cleaners for automobiles... 

This monograph is the first systematic treatment of the subject of particle adhesion (particles to surfaces) and autohesion (particles to particles). The author first attacks the subject from the theoretical standpoint of the physical and chemical factors giving rise to adhesion under ideal conditions of particle shape and surface characteristics, electrical forces, and substrate properties. The cases of adhesion in air and liquid media are differentiated, but the common factors are very nicely discussed. Following the establishment of the theoretical bases of the subject and a discussion of widely utilized experimental methods to obtain adhesion data for particles, the author proceeds to review available data for a variety of situations of practical importance where particle adhesion is intrinsic to the phenomenon. These topics include adhesion of particles to paint and varnish coatings, adhesion and removal of particles in an air flow and in a flow of water, adhesion of particles in air-cleaning equipment, particle adhesion in electrophotography, and soil erosion and silt transport. 

Air filters and other types of air cleaning equipment can be grouped together as... 

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