Allis-chalmers Corporation

Metso Minerals Industries, Inc.

Michael H Weinecke

Bobby P Faulkner

George T Lee

Peter L Schumacher

Robert J Unterweger

Wayne D Heyer

A system and process for the recovery of oil from the pyrolysis of material containing hydrocarbons such as shredded vehicle tires. The system utilizes a pair of sequentially positioned packed towers to recover at least 95% of the oil contained in the pyrolysis gases. The first packed tower operates above the dew point of the water vapor in the pyrolysis gases to insure that no water is condensed and obtain a primary oil fraction having oil with a high flash point of about 60&#xb0; C. or greater and a primary vapor fraction containing additional oils, fuel gases and water vapor. The primary vapor fraction is fed to the second packed tower which operates below the dew point of the water vapor to condense the water and oil having a low flash point of 34&#xb0; C. or below, and provide a secondary vapor fraction containing valuable fuel gases.

Condensation and recovery of oil from pyrolysis gas

An oil shale retorting method and apparatus moves a bed of oil bearing shale particles along a generally horizontal path and passes through the bed at spaced points a plurality of discrete nonoxidizing gas streams heated to different oil educting temperatures to vaporize and educe different weight fractions of oil from the kerogen in the shale into the gas streams. Preferably the heated gas streams are also passed through the moving shale bed upstream from distillation of the volatile oil constituents to preheat the shale particles and condense the educted oils which become suspended as stable mists and are mechanically separated from the gas streams. Heat energy is preferably removed from the spent shale particles of the moving bed by burning them with combustion air downstream from the retorting sites, and such heat energy is transferred to the nonoxidizing streams to raise them to different oil educting temperatures before they are passed through the moving bed to educe oil from the shale particles.

Apparatus for recovery of different weight fractions of oil from shale

A method and apparatus for recovering oil from shale comprises forming a bed of oil bearing shale particles on a plurality of rotatable apertured cylindrical rollers having filler members in the nip between adjacent rollers; transporting the bed by rotating the rollers to frictionally engage the shale particles and transfer them onto and across the filler members to continuously agitate the particles as they are being transported at a velocity substantially lower than the circumferential velocity of the rollers; passing through the moving bed at spaced points a plurality of discrete streams of nonoxidizing gas heated to different temperatures sufficiently high to educe different weight fractions of oil from the kerogen in the shale as vapors into the gas streams; and separating the different weight oil fractions from the gas streams. Preferably the heated nonoxidizing gas streams exiting the retorting zones are passed through the moving bed upstream from distillation of the volatile oil constituents to preheat the moving bed and condense the educted oils which become suspended as stable mists that can be separated from the gas streams.

Process for recovery of oil from shale

Process for recovery of different weight fractions of oil from shale

Roller grate method and apparatus for simultaneously transporting, agitating and exchanging heat with a bed of solid mineral particles has elongated cylindrical horizontal rollers with gas passage apertures therethrough, a hopper for feeding mineral particles onto the rollers and forming a bed having a depth several times greater than the average diameter of the particles; a drive source to rotate the rollers and frictionally engage the cylindrical surfaces with the particles in the lowermost layer of the bed and urge the bed along a path of travel transverse to the axes of the rollers; elongated filler members disposed in the nip between adjacent rollers to prevent the particles from jamming the rollers and to provide resistance to the flow of the bed along said path of travel; and a heat chamber spanning the rollers and a fan for forcing a heat transfer gas stream through the gas passage apertures in the rollers and through the bed as it is being transported, the rollers and the filler members being adapted to continually agitate the particles and to slowly transport the bed past the gas stream at a velocity which is only a minor fraction of the peripheral velocity of the rollers.

Method and apparatus for subjecting mineral particles to gas flow

Roller grate apparatus for simultaneously transporting and transferring heat to or from a bed of material particles has elongated cylindrical parallel horizontal rollers rotatably driven in the same direction; filler bars disposed in the nip between adjacent rollers and together with the rollers forming a generally flat surface with constantly moving portions which continually tumble the material particles and urge them thereacross in a direction transverse to the roller axes; gas passage apertures in the rollers which permit a heat transfer gas stream to pass through the rollers; a heat transfer chamber spanning the rollers; and a fan for blowing a heat transfer gas stream through the chamber and the material bed being transported by the rollers.

Roller grate material bed transporting and heat exchange apparatus

Roller grate material bed conveying and heat transfer apparatus which provides plural bed depths has cylindrical horizontal rollers driven in the same direction with gas passage apertures in the rollers and filler members in the nip between adjacent rollers. Means are provided to pass heat transfer gas streams through the bed as the rollers urge the material particles in a direction transverse to the roller axes and continually tumble the particles so that all surfaces thereof are exposed to the gas streams. A first plurality of rollers are positioned in a first generally horizontal plane to receive the material fed to the apparatus, and a second plurality of rollers downstream from the first rollers are at elevations lower than the first horizontal plane and preferably are driven at slower speed than the first rollers to thereby increase the material bed depth downstream from the first horizontal plane as the material particles are hardened by heat and can withstand greater bed depth without crushing. The first rollers and the second rollers may respectively be in the drying and preheating zones of the same iron ore pellet indurating apparatus.

Growing community of inventors

Franklin, WI, United States of America

Michael H Weinecke