Evaluating the performance of a turbulent wet scrubber for scrubbing particulate matter

A turbulent wet scrubber was designed and developed to scrub particulate matter (PM) at micrometer and submicrometer levels from the effluent gas stream of an industrial coal furnace. Experiments were conducted to estimate the particle removal efficiency of the turbulent scrubber with different gas...

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Bibliographic Details
Published in:Journal of the Air & Waste Management Association (1995) 2013-05, Vol.63 (5), p.499-506
Main Authors: Lee, Byeong-Kyu, Mohan, B. Raj, Byeon, Seung-Hyeok, Lim, Kyung-Soo, Hong, Eun-Pyo
Format: Article
Language:English
Subjects:
Aerodynamics
Air Pollutants
Air Pollution - prevention & control
Airborne particulates
Applied sciences
Atmospheric pollution
Coal
Dust
Environmental Restoration and Remediation - instrumentation
Equipment Design
Exact sciences and technology
Fluid dynamics
Fluid flow
Gas flow
General processes of purification and dust removal
Industry
Liquids
Particle Size
Performance evaluation
Pollution
Pressure
Prevention and purification methods
Reservoirs
Scrubbers
Turbulence
Turbulent flow
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Summary:A turbulent wet scrubber was designed and developed to scrub particulate matter (PM) at micrometer and submicrometer levels from the effluent gas stream of an industrial coal furnace. Experiments were conducted to estimate the particle removal efficiency of the turbulent scrubber with different gas flow rates and liquid heads above the nozzle. Particles larger than 1 µm were removed very efficiently, at nearly 100%, depending upon the flow rate, the concentration of the dust-laden air stream, and the water level in the reservoir. Particles smaller than 1 µm were also removed to a greater extent at higher gas flow rates and for greater liquid heads. Pressure-drop studies were also carried out to estimate the energy consumed by the scrubber for the entire range of particle sizes distributed in the carrier gas. A maximum pressure drop of 217 mm H 2 O was observed for a liquid head of 36 cm and a gas flow rate of 7 m 3 /min. The number of transfer units (NTU) analysis for the efficiencies achieved by the turbulent scrubber over the range of particles also reveals that the contacting power achieved by the scrubber is better except for smaller particles. The turbulent scrubber is more competent for scrubbing particulate matter, in particular PM 2.5 , than other higher energy or conventional scrubbers, and is comparable to other wet scrubbers of its kind for the amount of energy spent.
ISSN:1096-2247
2162-2906
DOI:10.1080/10962247.2012.738626