Process for producing solid industrial fuel
AssigneeThe Kingsford Company
InventorOwen Pyle
Life of this patent
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Abstract
An improved process for producing solid fuel from woody materials, which fuel may be characterized as having a low and relatively nonabrasive ash, is described. The process includes the steps of carbonizing the woody materials to form charcoal; cooling, conditioning and stabilizing the charcoal; crushing the charcoal typically to a particle size that will pass through about a 16 mesh or finer screen, beneficating the crude crushed charcoal by separating, on the basis of density, a dense fraction which may constitute from about 5 to 25 or more weight percent of the crude charcoal; and subsequently milling the beneficated product, if desired, to form a powdered fuel, or for compacting to make barbeque briquettes.
Claims7
A process for producing a substantially pollution-free fuel from moist woody vegetable materials comprising the steps of:
- continuously supplying said materials to dryer;
- drying said materials until the moisture content thereof is less than approximately 15 percent;
- admitting said dried materials to a carbonizer;
- pyrolyzing said materials in said carbonizer to form crude charcoal and a fuel gas therefrom;
- collecting at least a major portion of the fuel gas and charcoal formed;
- cooling and conditioning said charcoal against spontaneous combustion;
- crushing said charcoal until it will pass through an approximately 16 mesh U.S. Standard sieve but no finer than will just pass through about an 80 mesh sieve;
- beneficating said crude charcoal in a classifier and removing a dense fraction having a bulk density of at least about 50 lbs. per cubic foot therefrom to form a beneficated fuel which will produce, when burned, low relatively nonabrasive ash.
Dependencies are inferred from the claim text.