Simultaneous gasification of coal and pyrolysis of organic solid waste materials

Patent · Tue Oct 04 00:00:00 EDT 1977

OSTI ID:5390574

Schulz, H W

Gaseous fuels are produced by a process which involves simultaneous gasification of coal and pyrolysis of organic solid waste materials. A mixture of coal and organic solid waste materials is fed to the top of a reaction vessel such as a vertical shaft furnace or a blast furnace, wherein the feed is dried by heat exchange with the gases rising from the lower section of the reactor. Steam and an oxidant gas containing at least 75 volume percent oxygen are introduced to the bottom of the reactor for partially combusting coke and char in a partial combustion zone thereby providing the thermal driving force for the reactions in the reactor. The organic solid waste materials are pyrolyzed and the volatile components of the coal destructively distilled simultaneously in the presence of hydrogen in a pyrolysis and coking zone of the reactor wherein the organic solid waste materials are converted into char and the coal is converted into coke. The char and coke are reacted with oxygen and steam in the partial combustion zone. The descending inorganic materials are fused and the fused slag and molten metals are tapped from the bottom of the reactor. The gaseous products are removed from the top of the furnace and subjected to a product recovery section to remove the undesirable components. The ratio of hydrogen to carbon monoxide can be varied over a wide, commercially important range, by feeding secondary steam to a high temperature reaction zone intermediate the partial combustion zone and the pyrolysis and coking zone. Depending upon the ratio of hydrogen to carbon monoxide produced, the gaseous products can be used as fuel or as a synthesis gas for the production of methanol or methane. Gaseous product containing larger quantities of methane may be produced by maintaining the reactor at elevated pressures during the process.

• Assignee: Dynecology Incorporated
• Patent Number(s): US 4052173
• OSTI ID: 5390574
• Resource Relation: Patent File Date: Filed date 12 Apr 1976
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
09 BIOMASS FUELS
COAL GASIFICATION
CHEMICAL REACTORS
FUEL GAS
PURIFICATION
ORGANIC WASTES
PYROLYSIS
SYNTHESIS GAS
OXYGEN
REMOVAL
SLAGS
SOLID WASTES
STEAM
CHEMICAL REACTIONS
CRYOGENIC FLUIDS
DECOMPOSITION
ELEMENTS
ENERGY SOURCES
FLUIDS
FUELS
GASES
GASIFICATION
NONMETALS
WASTES
010404* - Coal
Lignite
& Peat- Gasification
010406 - Coal & Coal Products- Pyrolysis & Cracking- (-1987)
090122 - Hydrocarbon Fuels- Preparation from Wastes or Biomass- (1976-1989)