US 9,139,785 B2 · Method and apparatus for gasification of organic waste in batches

Abstract

A gasification reactor for processing organic waste in batches comprises a primary gasification reactor (62) that includes a primary gasification chamber (18) and a surrounding combustion chamber (19), a secondary gasification chamber (21), a synthesis gas decontamination unit (42) and a combustible gas selector (41). The waste is loaded into the primary gasification chamber through a latched opening and heated from the combustion of a fuel in the combustion chamber (19) to convert the waste to a synthesis gas. The gasification chamber (18) has an intake (20) for introducing pre-heated process air (1) therein. The combustion chamber operates either with a conventional fuel (9) or with the produced synthesis gas (6). The secondary gasification chamber (21) thermally treats the synthesis gas (2) to eliminate tars. The decontamination unit (42) scrubs the synthesis gas of contaminants including particulates and acid gases. The clean synthesis gas (6) is directed to the combustible gas selector (41) which selectively feeds either the combustible fluid (9) or the synthesis gas (6) to the burner (40).

Claims21

Dependent claims

A gasification waste processor for processing organic waste, the processor comprising:

a closed primary gasification chamber having a controlled process air inlet and a crude synthesis gas outlet, said primary gasification chamber having a latched hatch adapted to admit placement of bags of said waste in said primary chamber prior to gasification;
a combustion chamber configured to combust an external fuel and synthesis gas produced in the primary gasification chamber for providing process heat to said primary gasification chamber by direct heat exchange between combustion gases and said primary gasification chamber;
an electronic control system configured to control said combusting said fuel to ensure gasification of said organic waste and to control process air provided to said gasification chamber to control production of said synthesis gas so that the synthesis gas produced does not exceed what is needed to fuel the gasification of said waste heat requirements for gasification of waste in said gasification chamber, wherein supply and combustion of said external fuel is managed to no longer combust said external fuel when said heat from combustion of said synthesis gas is sufficient to produce said synthesis gas for heating said primary gasification chamber, and to complete gasification of said organic waste in said primary gasification chamber.

Dependencies are inferred from the claim text.

Method and apparatus for gasification of organic waste in batches

Life of this patent

Method and apparatus for gasification of organic waste in batches

Life of this patent

Abstract

Claims21