3202 



Chapter 26 



STEPPED 

 PLATE 

 FIRE GRATE 



COOLING 

 r WATER SPAYS 



CLEAN GAS 

 OUT 



FIRE DOORS 



^TAR SUMP 



Figure 26-24. — Original Crossley gas plant. (Drawing after Levelton and O'Connor 

 1978.) 



1981. State of the art for small (2-50 kW) gas producer engine systems. Final 

 Report to U.S. Dept. of Agric. Forest Service, Wash., D.C. 278 p. 



While not a completely proven technology in all applications, wood gasifica- 

 tion offers wide versatility (fig. 26-25). In North America, many types of wood 

 gasifiers are in various stages of development (Levelton and O'Connor 1978, 

 Solar Energy Research Institute 1979b). In general, wood gasifiers are smaller 

 than the coal gasification units now under development and would be suitable 

 primarily for smaller scale applications. Capacities of present wood gasifiers are 

 usually 10 million Btu/hour or less, and seldom exceed 100 million Btu/hour. 



WOOD- 



STEAM - 



OXYGEN - 



WOOD 

 GASIFIER 



-► MEDIUM BTU GAS 



FUEL CELL 



COMBUSTION 



CLEAN UP 



AND COMPRESSION 



SYNTHESIS GAS- 



CHEMICAL PROCESSES 



ELECTRICITY 



HEAT 

 STEAM 



AMMONIA 



HYDROGEN 



METHANOL 



METHANE 



GASOLINE 



Figure 26-25. — Gasification scheme for the production of energy, chemicals, and syn- 

 thetic fuels from wood. 



