SYSTEM AND METHOD FOR DOWNDRAFT GASIFICATION

摘要

A downdraft gasifier for producing a gaseous fuel to be used in an engine from a carbonaceous material with a pyrolysis module, a reactor module, and a heat exchanger system that cooperate to produce the gaseous fuel from the carbonaceous material and to extract particulates from the gaseous fuel from the reactor. The heat exchange system includes a first heat exchanger coupled to the dryer module that heats the carbonaceous material with the gaseous fuel output of the reactor module to dry the carbonaceous material; a second heat exchanger coupled to the pyrolysis module that heats the dried carbonaceous material with the exhaust from the engine to pyrolyze the dried carbonaceous material into tar gas and charcoal; and a third heat exchanger coupled to the reactor module that heats air used to combust the tar gas with the gaseous fuel output of the reactor module to preheat the air.

主权项

1. A downdraft gasifier system for producing a gaseous fuel from a carbonaceous material, the downdraft gasifier system comprising:
a dryer module; a pyrolysis module; a reactor module defining a combustion zone and a reduction zone, the reactor module comprising an air path fluidly connecting an oxygen source to the combustion zone of a reactor module interior, and a gaseous fuel outlet fluidly connected to the reduction zone; an engine comprising an engine inlet and an exhaust outlet; and a heat exchanger system comprising:
a first heat exchanger thermally coupled to and fluidly separated from the dryer module, the first heat exchanger fluidly coupled between the gaseous fuel outlet and the engine inlet;a second heat exchanger thermally coupled to and fluidly isolated from the pyrolysis module, fluidly coupled to the engine exhaust; anda third heat exchanger thermally coupled to and fluidly separated from the air path, the third heat exchanger fluidly coupled between the gaseous fuel outlet and the first heat exchanger.