Experimental Study on the Wet Electrostatic Precipitator for Purifying Biomass Fuel Gas

Abstract:

Recently, biomass fuel gas from the gasification furnace is widely used for power generation. However, there are many kindes of impurities in the biomass fuel gas. If they aren’t removed, they will have great disadvantages on the safe operation of gas turbine. So it must be purified before combustion in order to protect the gas turbine. Wet electrostatic precipitator can be used for purifying the biomass fuel gas for its high collection efficiency. The characteristics of biomass dust and collection efficiency of wet electrostatic precipitator are presented in the paper. A compared study on collection efficiency between dry electrostatic precipitator and wet one are carried out at the same condition. The results show that the dust in biomass fuel gas contains many elements, such as Si, O, Mg, Al, K, Ca and Fe. Its median diameter d₅₀ is 26.05 μm. Collection efficiency gradually increases with the water pressure at beginning of test. It doesn’t increase until the water pressure is 0.4 MPa. The higher the wind speed in electric field, the lower the collection efficiency is. Collection efficiency can be improved by adding alkali to the spraying water. When the polar matching is RS tubular barbed wire with 480C plate, water pressure is 0.4 MPa and gas velocity is 1.0 m/s, collection efficiency of the wet electrostatic precipitator is 5% more than the dry one.

• Periodical: Applied Mechanics and Materials (Volume 835)
• Pages: 743-748
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.835.743
• Online since: May 2016
• Authors: Li Chun Xiao*, Xiao Yuan Yang
• Keywords: Biomass Dust, Collection Efficiency, Electric Field Wind Speed, Wet Electrostatic Precipitator

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