PARALLEL PATH, DOWNDRAFT GASIFIER APPARATUS AND METHOD

摘要

A method for using a downdraft gasifier comprising a housing and a refractory stack contained within the housing. The refractory stack may comprise various sections. Apertures in the sections may be aligned to form multiple columnar cavities. Each columnar cavity may comprise an individual oxidation zone. The method of use may include the steps of placing a feedstock into an upper portion of the refractory stack, measuring the temperature of each columnar cavity, and adjusting the flow of oxygen to a particular columnar cavity to maintain the temperature of the particular columnar cavity within a particular range.

主权项

1. A method comprising:
selecting a downdraft gasifier comprising:
a housing,a refractory stack contained within the housing and comprising a plurality of sections formed of refractory, the plurality of sections comprising a lower manifold, at least one intermediate section resting on and extending upward from the lower manifold, and an upper manifold resting on and extending upward from the at least one intermediate section, andthe refractory stack wherein the upper manifold and the at least one intermediate section each comprise a plurality of apertures extending vertically therethrough, the plurality of apertures of the upper manifold aligning with the plurality of apertures of the at least one intermediate section to form a plurality of columnar cavities, each extending from the upper manifold to the lower manifold and placing the upper manifold in communication with the lower manifold; placing a feedstock into the upper manifold; measuring the temperature of each columnar cavity of the plurality of columnar cavities; and adjusting the flow of at least one gas selected form the group consisting of oxygen, oxygen enriched air, and air to a particular columnar cavity to maintain the temperature of the particular columnar cavity within a particular range.