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US 8,528,490 B1Granted
Biomass gasification system
AssigneeBEST S.p.A.
InventorsRaymond Dueck, Maciej G. Wierzbowski
Life of this patent
Estimating the term…
Abstract
A biomass gasification system for efficiently extracting heat energy from biomass material. The biomass gasification system includes a primary combustion chamber, a rotating grate within the primary combustion chamber for supporting the biomass during gasification, a feeder unit in communication with the primary combustion chamber for delivering biomass, a secondary combustion chamber fluidly connected to the primary combustion chamber, an oxygen mixer positioned between the primary combustion chamber and the secondary combustion chamber, a heat exchanger and an exhaust stack.
Claims16
A method of operating a biomass gasification system using biomass material containing silica, said method comprising the steps of:
- feeding a volume of biomass containing silica into a primary combustion chamber;
- combusting said biomass within said primary combustion chamber creating a primary combustion of said biomass resulting in a producer gas having a first flow rate;
- agitating said biomass within said primary combustion chamber during said combusting said biomass;
- adding oxygen to said producer gas forming a gas-oxygen mixture;
- transferring said producer gas with said oxygen to a secondary combustion chamber at a second flow rate, wherein said step of adding oxygen to said producer gas occurs prior to said producer gas entering said secondary combustion chamber;
- combusting said producer gas and said oxygen within a secondary combustion chamber fluidly connected to said primary combustion chamber creating a secondary combustion having a temperature of at least 2,000 degrees Fahrenheit thereby liquefying silica, wherein a volume of liquid silica forms on the inner walls of said secondary combustion chamber and is collected in a silica collector positioned at the bottom of said secondary combustion chamber;
- conducting heat from said secondary combustion with a heat exchanger fluidly connected to said secondary combustion chamber, wherein said heat exchanger utilizes a liquid within to conduct the heat from said secondary combustion;
- and
- utilizing the heated liquid from said heat exchanger to produce electricity or in a thermal application.
6 more elements
A method of operating a biomass gasification system using biomass material containing silica, said method comprising the steps of:
- feeding a volume of biomass containing silica into a primary combustion chamber;
- combusting said biomass within said primary combustion chamber creating a primary combustion of said biomass resulting in a producer gas having a first flow rate;
- agitating said biomass within said primary combustion chamber during said combusting said biomass;
- adding oxygen to said producer gas forming a gas-oxygen mixture;
- transferring said producer gas with said oxygen to a secondary combustion chamber at a second flow rate;
- combusting said producer gas and said oxygen within a secondary combustion chamber fluidly connected to said primary combustion chamber creating a secondary combustion having a temperature of at least 2,000 degrees Fahrenheit thereby liquefying silica;
- and
- conducting heat from said secondary combustion with a heat exchanger fluidly connected to said secondary combustion chamber, wherein said heat exchanger utilizes a liquid within to conduct the heat from said secondary combustion;
- utilizing the heated liquid from said heat exchanger to produce electricity or in a thermal application;
- condensing a volume of liquid silica on the inner walls of said secondary combustion chamber;
- collecting a volume of silica at a bottom of said secondary combustion chamber, wherein said step of collecting a volume of silica is comprised of collecting said volume of silica within a silica collector positioned approximately at a bottom of said secondary combustion chamber;
- and
- removing the collected silica from said silica collector.
10 more elements
A method of operating a biomass gasification system using biomass material containing silica, said method comprising the steps of:
- feeding a volume of biomass containing silica into a primary combustion chamber;
- rotating said biomass within said primary combustion chamber;
- combusting said biomass within said primary combustion chamber creating a primary combustion of said biomass resulting in a producer gas having a first flow rate;
- agitating said biomass within said primary combustion chamber with a plunger member during said combusting said biomass;
- adding oxygen to said producer gas forming a gas-oxygen mixture;
- transferring said producer gas with said oxygen to a secondary combustion chamber at a second flow rate, wherein said second flow rate is comprised of a high velocity jet stream that enters said secondary combustion chamber, wherein said second flow rate is greater than said first flow rate;
- combusting said producer gas and said oxygen within a secondary combustion chamber fluidly connected to said primary combustion chamber creating a secondary combustion having a temperature of at least 2,000 degrees Fahrenheit thereby liquefying silica, wherein said secondary combustion burns contaminants contained within said producer gas;
- and
- conducting heat from said secondary combustion with a heat exchanger fluidly connected to said secondary combustion chamber, wherein said heat exchanger utilizes a liquid within to conduct the heat from said secondary combustion;
- utilizing the heated liquid from said heat exchanger to produce electricity or in a thermal application;
- condensing a volume of liquid silica on the inner walls of said secondary combustion chamber;
- collecting a volume of silica at a bottom of said secondary combustion chamber, wherein said step of collecting a volume of silica is comprised of collecting said volume of silica within a silica collector positioned approximately at a bottom of said secondary combustion chamber;
- removing the collected silica from said silica collector;
- and
- passing air through said biomass within said primary combustion chamber.
12 more elements
Dependencies are inferred from the claim text.