Back to results
US 5,496,465 AGranted
Vibrating bed coal pyrolysis system
OwnerArthur P. Fraasinventor
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
OwnerArthur P. Fraasinventor
Estimating the term…
A vibrating bed pyrolysis system has a vibrating bed which is supplied with hot solid particles. Dry coal particles are rapidly heated by the hot solid particles to drive off hydrocarbon vapors. The vapors are condensed in a jet condenser, and products are flowed to a header tank. A portion of the liquid product is stored at room temperature for later use. A small portion of the liquid product is pumped from the header tank and cooled to ambient temperature and is sprayed in the jet condenser, which is positioned above the vibrating pyrolysis bed. A dryer bed vibrated by the same vibrating machine which vibrates the pyrolysis bed is supplied with hot solid particles and the crushed coal. Moisture in the coal particles is evaporated, and water vapors entrain coal fines before the coal particles are passed to the pyrolysis bed. The hot solid particles are taken from a fluidized bed combustor and are returned to the combustor with the coal char particles by entrainment into the gas lift system. The water vapor and entrained coal fines from the dryer flow into the combustor and a non-condensable gaseous portion of the product flows from the header tank to the combustor.
A method of producing fluid fuel and feed stock by coal pyrolysis, comprising crushing coal into particles, providing a bed of heated sorbent particles, vibrating the bed of hot sorbent particles by mounting the bed on a vibrating machine, introducing a stream of crushed coal particles to the vibrating bed of heated sorbent particles, rapidly heating the crushed coal particles in the vibrating bed of heated sorbent particles, creating gaseous products from the coal, withdrawing the gaseous products, condensing part of the gaseous products and storing the condensed products.
A method of coal pyrolysis, comprising vibrating a bed of heated solid particles by mounting the bed on a vibrating machine, crushing coal into coal particles and flowing the coal particles through the vibrating bed, rapidly heating the coal particles with the heated solid particles and driving off hydrocarbon vapors from the coal particles in flash pyrolysis, cooling and condensing the hydrocarbon vapors above the vibrating bed to liquid hydrocarbon product and removing and storing the liquid hydrocarbon product from the coal pyrolysis.
Dependencies are inferred from the claim text.