Method And Reactor For Biomass Pyrolytic Conversion

Abstract

A method and apparatus performing high temperature fast pyrolysis of dry biomass are described. High yield of gases with medium caloric value and low tar content are claimed. Passing electric current through the mixture of biomass with conductive particles in the stirred bed inside the reactor provides the intensive direct heating of the biomass in the pyrolytic reactor.

1 . A method for pyrolytic processing of biomass comprising:
 feeding crushed dried biomass into a pyrolytic reactor comprising a body, a revolving shaft, and electricity conductive particles;   mixing the dried biomass and said conductive particles;   applying a current to the electricity conductive particles so as to allow the conductive particles as well as the biomass to heat up;   partially cooling vapors-gaseous products created by pyrolysis and producing fuel-gas;   
     whereby a pyrolysis process is realized within the pyrolytic reactor and fuels for power generation production. 
   
   
       2 . The method as claimed in  claim 1 , wherein the biomass within said pyrolytic reactor is heated at a high heating rate up to a temperature between 700 and 1000° C. 
   
   
       3 . The method as claimed in  claim 2 , wherein said temperature is between 750 and 850° C. 
   
   
       4 . The method as claimed in  claim 1 , wherein the biomass is any type of dry solid waste biomass. 
   
   
       5 . The method as claimed in  claim 4 , wherein said biomass is selected from a group of biomasses such as olive husks, wood, forest and agricultural residues such as bagasse, coconut shell, corn stalks, wheat straw, rice husk and rice straw, dried sludge from water treatments. 
   
   
       6 . A pyrolytic reactor for biomass processing comprising:
 a cylindrical body;   a revolving shaft within said cylindrical body, wherein said shaft is adapted to mix the biomass;   at least one raw material feeder provided to said cylindrical body;   at least one product coke discharge system;   at least one pipe for volatile products evacuation;   conductive particles provided within said cylindrical body;   
     Whereby electric current that is supplied through said shaft and through said cylindrical body is transmitted through said conductive particles so as to allow sufficient heating of the conductive particles as well as the biomass that is mixed with them while pyrolysis of the biomass occurs. 
   
   
       7 . The reactor as claimed in claim  8 , wherein said cylindrical body is equipped with a chamber for additional (secondary) pyrolysis.