Down-draft fixed bed gasifier system

A gasifier apparatus for obtaining combustible gaseous products from solid fuel materials comprising:

• a plurality of vertically aligned, modular, interconnected chamber means for housing a gasification reaction including a hopper chamber disposed at a top portion of said gasifier, a drying chamber disposed below and in communication with said hopper chamber, an intermediate chamber disposed below and in communication with said drying chamber, and a lower chamber disposed below and in communication with said pyrolysis chamber;
• radial air inlet means extending through an outer skin of said gasifier for directing air into said intermediate and lower chamber means to maintain the gasification reaction;
• an annular flange means, integral with an inner refractory wall of said intermediate chamber and extending downwardly into a portion of said lower chamber, for defining a gas discharge pathway within said lower chamber, said gas discharge pathway defined by the outer wall of said flange and the inner wall of said lower chamber;
• and
• first and second gas discharge conduits disposed at a top portion of said gas discharge pathway, said conduits disposed on opposite sides of said gasifier and offset by an angle of about 45.degree. to 90.degree. degrees from said radial air inlets.