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US 2024/0240788 A1Published application
A Biochar Production Plant, A Combustion Chamber and a Method of Operating the Combustion Chamber
OwnerFrederick Michael Jonesinventor
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OwnerFrederick Michael Jonesinventor
Estimating the term…
The invention relates to a biochar production plant, a combustion chamber, and a method of operating same. The plant comprises a fuel hopper, a fuel delivery system, a combustion stage, and a post combustion stage. The post combustion stage includes a generator; a biochar removal stage and a flue gas scrubber. The combustion stage comprises a combustion chamber having an active fluid biochar bed comprising a pair of oscillating plates, one on top of the other; an air injection ring positioned above and spaced apart from the pair of oscillating plates; a biochar shelf, below and surrounding the active fluid biochar bed, positioned to receive biochar falling from the pair of oscillating plates, and means to transfer the biochar from the biochar shelf to a biochar outlet. There is provided at least one sensor operable to measure the depth of the active fluid biochar bed on the oscillating plates and a controller responsive to the sensor. The controller is operable to control the depth of the active fluid biochar bed and the temperature of combustion by controlling the oscillating plates and the air delivered into the combustion chamber. In this way, the construction is very simple, cost effective and has accurate combustion control leading to a quality biochar end product.
A biochar production plant comprising:
A biochar production plant as claimed in any preceding claim in which the post combustion stage further comprises a generator.
A biochar production plant as claimed in any preceding claim in which the combustion stage further comprises a pre-conditioner.
A biochar production plant as claimed in any preceding claim in which the at least one sensor operable to measure the depth of the active fluid biochar bed comprises a pair of pressure sensors, one of which is located above the air injection ring and the other of which is located below the air injection ring.
A biochar production plant as claimed in any preceding claim in which the pair of oscillating plates are star shaped.
A biochar production plant as claimed in any preceding claim in which the fuel outlet comprises a frusto-conical shaped fuel nozzle located centrally in the combustion chamber relative the sides of the combustion chamber.
A biochar production plant as claimed in any preceding claim in which the means to transfer the biochar from the biochar shelf to the biochar outlet comprises at least one scraper paddle configured to sweep the biochar from the biochar shelf.
A biochar production plant as claimed in any preceding claim in which the air injecting ring surrounds the fuel nozzle, and comprises a plurality of air nozzles through which air is delivered towards the centre of the combustion chamber.
A biochar production plant as claimed in any preceding claim in which the biochar removal stage comprises a water-filled wet biochar removal stage beneath the active fluid biochar bed and the biochar shelf.
A biochar production plant as claimed in any preceding claim in which the flue gas scrubber comprises a condenser and a waste water filter.
A biochar production plant as claimed in any preceding claim in which the bottom plate of the pair of oscillating plates oscillates between 0.40 m and 0.60 m, and the top plate of the pair of oscillating plates oscillates between 0.2 m and 0.4 m respectively.
A biochar production plant as claimed in any preceding claim in which the distance between the air injection ring and the top plate of the pair of oscillating plates is between 0.065 m and 0.12 m.
A combustion chamber for a biochar production plant comprising:
A method of operating a combustion chamber for a biochar production plant comprising the steps of:
Dependencies are inferred from the claim text.