PLANT AND METHOD FOR THE PRODUCTION OF GAS FROM BIOMASS

摘要

The invention relates to a plant 100 for the production of gas from biomass, comprising a gasifier 8 of the open- core downdraft type and an apparatus 10 for cleaning the gas G. The apparatus comprises: - an inlet line 12 for the gas to be cleaned; - an evaporative cooler 16 having: means 18 for spraying an aqueous mixture MA into the gas; a basin 20 for containing the condensed mixture; and a first bleed pipe 22 for removing the pollutants; - a condensing wet electrostatic precipitator 26 having: means 28 for cooling the walls 29 in contact with the gas; a tank 30 for collecting the mixture condensed by cooling; a recirculation pipe 31 for removing the mixture and conveying it to the evaporative cooler; a second bleed pipe 32 for removing the pollutants from the tank; and a discharge pipe 34 for removing the excess aqueous mixture; - an outlet line 36 for conveying the flow of cleaned gas G to an external utilization unit 38. The invention also relates to a method for treating the gas.