Process for fixed bed coal gasification

Patent · Tue Sep 08 04:00:00 EDT 1992

OSTI ID:6945829

Sadowski, R S

This patent describes a method of gasifying solid carbonaceous fuel. It comprises introducing solid carbonaceous fuel, an oxidant, and a combustible gas under pressure into a first end of an open-ended entrained bed pyrolyzer tube; igniting the combustible gas in order to devolatilize the fuel within the pyrolyzer tube and form ash, char, and volatiles; discharging the devolatilized fuel comprising char, ash, and volatiles from a second end of the pyrolyzer tube directly into the pressure vessel at a location above the fixed bed and passing the char, ash, and volatiles downwardly through a high temperature region of the fixed bed pressure vessel; introducing gasifying agents into the pressure vessel at a point adjacent to the second of the pyrolyzer tube to crack any tar present; allowing the pressure vessel to heat to a temperature sufficient to oxidize the ash and char to carbonaceous gases, the ash and char descending by gravity; allowing unreacted char and ash to cool; removing ash, char, and volatiles from the pressure vessel.

• Assignee: CRS Sirrine Engineers, Inc., Houston, TX (United States)
• Patent Number(s): US 5145490; A
• Application Number: PPN: US 7-814102
• OSTI ID: 6945829
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010404* -- Coal
Lignite
& Peat-- Gasification
ASHES
CHARS
COAL GASIFICATION
COMBUSTION PRODUCTS
CONTAINERS
CONTROL
GASIFICATION
PACKED BEDS
PRESSURE VESSELS
PROCESS CONTROL
PYROLYSIS PRODUCTS
RESIDUES
TECHNOLOGY ASSESSMENT
THERMOCHEMICAL PROCESSES