Process for continuous thermal treatment of carbonizable material

Patent · Tue Sep 18 04:00:00 EDT 1984

OSTI ID:5878089

Halm, E

Materials which become carbonized at high temperatures, such as wood, cellulose, household refuse, used tires, plastics, tar sand, oil shale, and the like, are subjected to thermal treatment, i.e., pyrolysis or gasification, in an electric shaft furnace having top and bottom electrodes. The material is charged into the furnace at the top and continuously moved downward through the furnace so slowly that as a result of heat transfer from the hotter parts of the furnace, it is carbonized to an extent which renders it electrically conductive by the time it comes in contact with those parts of the electrodes by means of which electric current is conducted through the material. The material charged at the top of the furnace can be caused to move downward by withdrawing suitable amounts of solid material from the bottom of the furnace, for example, or by gasifying the material with steam.

• Assignee: Ing A Maurer Societe Anonyme (Switzerland)
• Patent Number(s): US 4472245
• OSTI ID: 5878089
• Country of Publication: United States
• Language: English

Related Subjects

04 OIL SHALES AND TAR SANDS
040402 -- Oil Shales & Tar Sands-- Surface Methods
09 BIOMASS FUELS
090400 -- Solid Waste & Wood Fuels-- (-1989)
42 ENGINEERING
421000* -- Engineering-- Combustion Systems
CARBOHYDRATES
CARBONACEOUS MATERIALS
CARBONIZATION
CELLULOSE
CHEMICAL REACTIONS
COMBUSTION CONTROL
CONTROL
CURRENTS
DECOMPOSITION
DESIGN
ELASTOMERS
ELECTRIC CONDUCTIVITY
ELECTRIC CURRENTS
ELECTRICAL PROPERTIES
ELECTRODES
ENERGY TRANSFER
FURNACES
GASIFICATION
HEAT TRANSFER
HEATING
MATERIALS
MUNICIPAL WASTES
ORGANIC COMPOUNDS
ORGANIC POLYMERS
PETROCHEMICALS
PETROLEUM PRODUCTS
PHYSICAL PROPERTIES
PLASTICS
POLYMERS
POLYSACCHARIDES
RUBBERS
SACCHARIDES
SYNTHETIC MATERIALS
THERMOCHEMICAL PROCESSES
WASTES
WOOD