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RESEARCH PAPERS: Additional Technical Papers

A Fluidic Regenerative Filtration System for Hot Gas Cleaning

[+] Author and Article Information
Ieuan Owen

Department of Mechanical Engineering, The University of Liverpool, Liverpool, England

Nick Syred

Department of Mechanical Engineering and Energy Studies, University of College Cardiff, Wales, U.K.

G. P. Reed

Gasification Section, Coal Research Establishment, Stoke Orchard, Cheltenham, U.K.

J. Dyn. Sys., Meas., Control 105(3), 185-191 (Sep 01, 1983) (7 pages) doi:10.1115/1.3140653 History: Received March 01, 1982; Online July 21, 2009

Abstract

Combined power cycles are being developed in which low calorific value fuel gas is produced by a fluidised bed coal gasifier at high temperatures and pressures (up to 1000°C and 20 bar) to be burned and expanded through a gas turbine. The turbine specifications required the removal of all particulate material greater than 5 μm. To ensure adequate collection efficiencies it may be necessary to use filtering media such as granular beds or ceramic fibres. Filters, however, need to be replaced or regenerated at regular intervals in order to maintain the pressure differentials across them to within specified levels. This paper describes how fluidic valves (vortex amplifiers) can be used in the hostile conditions to provide the switching capability in a regenerative filtration system. A penalty is incurred in using the valves in that they require an extraneous control fluid to perform the switching function. Results of experiments at elevated temperatures together with an analysis of the system at high pressures show that in a practical system the dilution of the mainstream fuel gas by the control gas can be reduced to 0.35 percent. The fluidic switching circuit is shown to be a highly effective system for handling gas flows at elevated temperatures and pressures.

Copyright © 1983 by ASME
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