Numerical Simulation of Vibration of Induced Draft Fan behind Desulfurization Tower Caused by Dust Accumulation

Abstract:

For a reduction ofthe volume and cost of equipment, some thermal power plants have no gas heater in their desulfurization systems. Because of desulfurized gas with high humidity, residual dust, and limestone slurry, induced draft fan (IDF) is often subject to vibration caused by dust accumulation while operating, resulting in occasional shut-down for dust cleaning. To solve this problem, fine sand was added to jet nozzle in the circumstance of severe dust accumulation, to enhance cleaning effect in this study. The Fluent software was used to simulate the static pressure distribution on non-working surfaces of the IDF blades with different sand flows. Results showed that the addition of fine sand could enhance the static pressure on non-working surfaces. The optimum ratio of nozzle flow to sand flow was concluded. This was of great significance for IDF on low load to prevent dust accumulation vibration and to keep safe and stable operation.

• Periodical: Applied Mechanics and Materials (Volumes 675-677)
• Pages: 619-622
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.675-677.619
• Online since: October 2014
• Authors: Tai Lv, Pei Ye He*
• Keywords: Dust Accumulation Vibration, Gas Heater, Induced Draft Fan, Jet Nozzle, Sand Purge

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