Integrated medium-high temperature coal gas purification method and device suitable for coal-based gas

Coal-based gas suitable for integration of a high temperature gas purification process flow: high temperature gas from the gasifier into the lower part of the countercurrent moving bed by the inlet of the apparatus, the impurity gas in thermal contact with the solid scavenger contains the impurities from the solid scavenger absorption, a high temperature gas through a ceramic filter is discharged from the top of the upper portion of the outlet filter unit. The disposable removal of gaseous impurities in the gas, while the gas in the medium - high dust removal filter unit. Cleaning temperature of 300-600 deg.] C, the pressure is atmospheric pressure, the gas space velocity was 1000h-1. The present invention is clean and efficient, the impurity-containing gas from a contact failure of the cleaning agent and moved closer to the bottom of the bed, the conversion increases scavenger. In moving the bed part, a fresh cleaning agent in contact with the low impurity content of the gas, gas cleaning to ensure high efficiency. When the temperature is 400 ℃ -600 ℃, the gas removal efficiency of impurities of 99.9%.