Method and apparatus for a combined tire pyrolyzer/gasifier and biomass gasifier

A method for providing electricity from the burning of dirty fuels while reducing harmful emissions, the method comprising:

• providing a dirty fuel;
• burning the dirty fuel in an updraft gasifier or pyrolyzer to create heat and syngas/exhaust;
• transferring the exhaust from the burning of the dirty fuel to a downdraft or updraft biomass gasifier;
• scrubbing, via gasification, said exhaust in the downdraft or updraft biomass gasifier so as to reform the exhaust to create a scrubbed clean biomass syngas, wherein:
• the downdraft or updraft biomass gasifier allows for the scrubbing of the exhaust without using an additional scrubber and with substantially no processing of flue gas,
• the downdraft or updraft biomass gasifier further allows for creating a char having a carbon content of at least 50 wt. %, and
• the production of char serves as the only scrubbing agent;
• burning the scrubbed clean biomass syngas in a syngas burner;
• separating the char from waste ashes;
• recycling the separated char back into the downdraft or updraft biomass gasifier;
• using heat from said burning to create steam in a steam boiler;
• routing the steam into a steam turbine;
• turning the steam turbine to power a generator to create electricity;
• returning condensed water from the steam turbine to the steam boiler;
• and
• filtering exhaust gas from the syngas burner through an activated carbon bed impregnated with sodium hydroxide or potassium hydroxide to remove VOCs and sulfur-containing compounds.

An apparatus for co-generation of power that reduces the pollution of a burned primary fuel, the apparatus comprising:

• an updraft gasifier for gasifying a primary fuel creating heat and dirty exhaust;
• a downdraft biomass gasifier configured to scrub, via gasification, the dirty exhaust to reform the dirty exhaust into a clean auxiliary fuel, wherein:
• the downdraft biomass gasifier allows for the scrubbing of the dirty exhaust without using an additional scrubber and with substantially no processing of flue gas,
• the downdraft gasifier comprises a rotating bed assembly that allows used ashes and a char to fall to a central point, which is connected to an auger for removing the fuel and ashes after they have been through the gasification process and fallen to a bottom of the rotating bed assembly,
• said char having a carbon content of at least 50 wt. %, and
• the production of char serves as the only scrubbing agent;
• wherein the downdraft biomass gasifier comprises a rotating-bed gasifier that performs carbon adsorption without requiring pumps to recirculate scrubbing solution, liquid distribution systems, or mist eliminators;
• a syngas burner for burning the clean auxiliary fuel;
• a boiler operatively connected to the syngas burner for generating a hot gas;
• an engine operatively linked to the downdraft biomass gasifier for turning the syngas into power;
• a first generator operatively connected to an engine for turning the power into electricity;
• and
• a carbon adsorber or activated carbon bed configured to remove volatile organic compounds and sulfur-containing compounds from exhaust gas of the syngas burner, wherein the activated carbon is impregnated with a hydroxide to enhance adsorption performance.