Exit humidity of wet scrubbers for underground coal mines

Situ, R., Brown, R.J., Wang, H., Surawski, N., and Ristovski, Z.D. (2012) Exit humidity of wet scrubbers for underground coal mines. In: Proceedings of the 18th Australasian Fluid Mechanics Conference, pp. 1-4. From: 18th Australasian Fluid Mechanics Conference, 3-7 December 2012, Launceston, Tasmania, Australia.

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Abstract

A wet scrubber is a device used in underground coal mines for the exhaust treatment system of various internal combustion engines (generally diesel) primarily as a spark arrestor with a secondary function to remove pollutants from the exhaust gas. A pool of scrubbing liquid (generally water based) is used in conjunction with a Diesel Particulate Filter (DPF). Scrubbers are widely used in underground applications of diesel engines as their exhaust contains high concentration of harmful diesel particulate matter (DPM) and other pollutant gases. Currently the DPFs have to be replaced frequently because moisture output from the wet scrubber blocks the filter media and causes reduced capacity. This paper presents experimental and theoretical studies on the heat and mass transfer mechanisms of the exhaust flow both under and above the water surface, aiming at finding the cause and effects of the moisture reaching the filters and employing a solution to reduce the humidity and DPM output, and to prolong the change-out period of the DPF. By assuming a steady flow condition, heat transfer from the inlet exhaust gas balances energy required for the water evaporation. Hence the exit humidity will decrease with the increase of exit temperature. Experiments on a real scrubber are underway.

Item ID: 26127
Item Type: Conference Item (Refereed Research Paper - E1)
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ISBN: 978-0-646-58373-0
Date Deposited: 08 Apr 2013 04:14
FoR Codes: 09 ENGINEERING > 0902 Automotive Engineering > 090204 Automotive Safety Engineering @ 50%
09 ENGINEERING > 0915 Interdisciplinary Engineering > 091505 Heat and Mass Transfer Operations @ 50%
SEO Codes: 84 MINERAL RESOURCES (excl. Energy Resources) > 8498 Environmentally Sustainable Mineral Resource Activities > 849801 Management of Gaseous Waste from Mineral Resource Activities (excl. Greenhouse Gases) @ 30%
84 MINERAL RESOURCES (excl. Energy Resources) > 8498 Environmentally Sustainable Mineral Resource Activities > 849805 Management of Water Consumption by Mineral Resource Activities @ 30%
85 ENERGY > 8502 Mining and Extraction of Energy Resources > 850201 Coal Mining and Extraction @ 40%
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