Method and apparatus for reforming tar in gasification equipment

Abstract

A ceramic heat exchanger 3 is provided for heat-exchanging of a gasification gas (600-900° C.) containing tar and produced in a gasification furnace 1 with a reformed gasification gas (1100-1500° C.) from a reforming furnace 2 for temperature raising before introduction of the gasification gas into the reforming furnace.

1 . A method for reforming tar in a gasification equipment wherein fuel is gasified with a gasification agent in a gasification furnace to produce a gasification gas, said gasification gas being introduced into a reforming furnace where a tar component in the gasification gas is reformed,
 characterized in that the gasification gas containing tar and produced in the gasification furnace is heat-exchanged in a ceramic heat exchanger with a reformed gasification gas from the reforming furnace for temperature raising of said gasification gas before introduction thereof into the reforming furnace.   
     
     
         2 . A method for reforming tar in a gasification equipment as claimed in  claim 1 , wherein a portion of fuel to be supplied to the gasification furnace is burned in a combustion furnace to supply a resultant exhaust combustion gas to a ceramic tube disposed in the reforming furnace for temperature raising of the gasification gas in the reforming furnace to thereby reform a tar component in the gasification gas. 
     
     
         3 . A method for reforming tar in a gasification equipment as claimed in  claim 2 , wherein air for said combustion furnace is heat-exchanged in metallic and ceramic heat exchangers with the exhaust combustion gas from the ceramic tube in said reforming furnace for temperature raising of the air before introduction thereof into the combustion furnace and for temperature lowering of the exhaust combustion gas from the ceramic tube before discharge thereof. 
     
     
         4 . An apparatus for reforming tar in a gasification equipment wherein fuel is gasified with a gasification agent in a gasification furnace to produce a gasification gas, said gasification gas being introduced into a reforming furnace to reform a tar component in the gasification gas,
 characterized by comprising a ceramic heat exchanger for heat-exchanging the gasification gas containing tar and produced in the gasification furnace with a reformed gasification gas from the reforming furnace for temperature raising of said gasification gas before introduction thereof into the reforming furnace.   
     
     
         5 . An apparatus for reforming tar in a gasification equipment as claimed in  claim 4 , further comprising
 a combustion furnace for burning a portion of fuel to be supplied to said gasification furnace, and   a ceramic tube disposed in said reforming furnace and supplied with exhaust combustion gas from said combustion furnace for temperature raising of the gasification gas in said reforming furnace to thereby reform a tar component in the gasification gas.   
     
     
         6 . An apparatus for reforming tar in a gasification equipment as claimed in  claim 5 , further comprising metallic and ceramic heat exchangers for heat-exchanging air for said combustion furnace with the exhaust combustion gas from the ceramic tube before introduction of said air into said combustion furnace and for temperature lowering of the exhaust combustion gas before discharge thereof.