Processing materials

Abstract

Biomass feedstocks (e.g., plant biomass, animal biomass, and municipal waste biomass) are processed to produce useful products, such as fuels. For example, novel systems, methods and equipment for conveying and/or cooling treated biomass are described.

What is claimed is: 
     
         1 . A system for processing a biomass material comprising:
 a first treatment cell equipped with a first electron beam device for irradiating the biomass material with electron beams, and   a screw conveyor comprising a housing and interior portions, wherein the interior portions convey the irradiated biomass material from the first treatment cell and the housing is cooled.   
     
     
         2 . The system of  claim 1 , further comprising a second treatment cell equipped with an second electron beam device, wherein the screw conveyor conveys the biomass material from the first treatment cell to the second treatment cell. 
     
     
         3 . The system of  claim 1 , wherein the housing is cooled using a chilled liquid. 
     
     
         4 . The system of  claim 3 , wherein the housing is cooled using water or glycol water mixtures. 
     
     
         5 . The system of  claim 1 , wherein the screw conveyor comprises two or more screws. 
     
     
         6 . The system of  claim 1 , wherein the screw conveyor has a material inlet and a material discharge. 
     
     
         7 . The system of  claim 1 , wherein the first and second treatment cells are capable of delivering a total dose of between about 1 and 200 Mrad. 
     
     
         8 . The system of  claim 7 , wherein the first and second treatment cells are capable of delivering a total dose of between about 10 Mrad and about 50 Mrad. 
     
     
         9 . The system of  claim 8 , wherein the first and second treatment cells are capable of delivering a total dose of between about 20 Mrad and about 40 Mrad. 
     
     
         10 . The system of  claim 1 , wherein the screw conveyor further comprises a notched flight for comminuting the biomass material while it is conveyed. 
     
     
         11 . The system of  claim 1 , wherein the biomass comprises a lignocellulosic material. 
     
     
         12 . The system of  claim 2 , wherein at least one of the first and second electron beam devices comprises multiple accelerating heads. 
     
     
         13 . The system of  claim 2 , wherein each of the first and second electron beam devices comprises multiple accelerating heads.