Entrained-flow gasifier and gasification method using the same for synthesizing syngas from biomass fuel
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United States of America Patent
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Jan 23, 2018
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Nov 6, 2016
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Dec 29, 2011
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Abstract
A method for gasifying biomass using a gasifier, the gasifier including a furnace body and a fuel pretreatment system. The method includes 1) crushing and sieving a biomass fuel to yield particle size-qualified fuel particles, 2) exciting working gas to yield plasma, and spraying the plasma into the gasifier, 3) spraying the particle size-qualified fuel particles into the gasifier via nozzles, synchronously spraying an oxidizer via an oxygen/vapor inlet into the gasifier, and 4) monitoring the temperature and components of the syngas, regulating an oxygen flow rate, a vapor flow rate, and microwave power to maintain the process parameters within a preset range and to control a temperature of the syngas to be between 900 and 1200° C., collecting the syngas from the syngas outlet at the top of the furnace body, and discharging liquid slag from the slag outlet.
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