Short Course I-April 11, 2015

Air Pollution Control

This course is a comprehensive review of the processes involved in the separation of solid or liquid particles from air (and gases). It draws upon the presenter’s experience of industrial applications and R&D, and the emphasis will be on practical aspects with theoretical information presented only where needed to support understanding of the applications. The Course will be of interest to engineers, technicians, scientists, managers, and other personnel involved in gas-solid separation in the process and other industries, including automotive applications. They will find the course informative, regardless of whether they design, purchase, research, or use dust or fine particle (for example, PMx) separation equipment, or use gas pollutant removal equipment. The reasons for use may be, for example, product recovery, emission control, air cleaning or process gas cleaning.


Prof. Richard Wakeman


Introduction to the Programme – Structure and Overview
Air Pollution – Sources, Effects and Emissions Guidelines
The 1952 London smog and the lessons learned. Natural and man-made sources of air pollution. Importance of clean air. Gaseous (SOx, NOx, O3) and particulate (PMx) pollutants and WHO guidelines. Health and damage effects of pollutants – the need for air cleaning. Air quality information, Limit Values, emissions targets and IAQ. Overview of widely used air cleaning technologies.
Evaluations for Dust Collection Equipment
Particle size characterisation, concentration measurement, overall and fractional collection efficiency. Comparison of different dust collection techniques, fields of application, selection procedure.
Morning Refreshments and Networking
Wet Scrubbers
Scrubber types; advantages, limitations and uses of wet scrubbers. Particle capture mechanisms. Spray towers and cyclonic types, tray towers, venture scrubbers, orifice scrubbers, packed and condensation scrubbers. Venturi scrubber systems; design parameters, and configurations. Typical operating data for alternative scrubber types.
Hot Gas Filtration – Catalytic Filters
Why do we need hot gas filters? Challenges of hot gas filtration; example applications. Filter media for hot gases – metal, ceramic, mineral. Technical comparisons of alternative media. Industrial catalytic air filtration and selective catalytic reduction for industrial processes. Filter plant layout and example applications.
Vehicle Emissions Filtration
PM2.5 emissions from road sources. Emissions legislation and its impact. EURO 6. Control of PM2.5, PM10 and NOx. Selective catalytic reduction (SCR) for NOx and PM control in emissions. Catalysis and filtration, catalytic converters and particulate filters. 2-, 3- and 4-way emission control systems.
Fibrous Filters (Deep Bed Filters)
Prefilters, panel filters, pocket filters, HEPA filters. Classifications of filter types (EPA, HEPA, ULPA). Particle collection mechanisms. Penetration and particle size, capture efficiency, filter loading. Charged media. Filter testing for applications; pressure rise and fractional efficiency. Some do’s and don’t’s.
Afternoon Refreshments and Networking
Fabric Filters (Surface Filters)
Alternative fabric filter designs (shaker, reverse flow, pulse jet); modes of operation, general design parameters. Bag houses. Bag house cleaning parameters. Useful filter media/fibre properties. Filter performance. Precoating.
Discussion - Question and Answer Session