Producing pure gas of high calorific value from gasification of solid fuel

Patent · Tue Jul 08 04:00:00 EDT 1980

OSTI ID:5113462

Bierbach, H; Hafke, C; Kohlen, R

A process is described for producing and then using a gas of high calorific value and low dust content comprising contacting a solid fuel with water vapor and free oxygen in a gasification reactor at a pressure of about 5 to 150 bars and a temperature sufficient to produce a gas containing hydrogen and carbon monoxide, containing at least about 8 grams of dust per standard cubic meter and having a temperature of about 350 to 800/sup 0/C, subjecting the gas to a dry coarse purification to reduce the solids content thereof, intensely scrubbing the gas at about 150 to 350/sup 0/C with a scrubbing liquid predominantly comprising hydrocarbons and including less than 2% of water by weight, after said dry coarse purification and before said scrubbing spraying water into the gas thereby to cool it to below 350/sup 0/C so as to prevent cracking of constituents of said scrubbing liquid, at least about 70% of said hyudrocarbons of the scrubbing liquid having a boiling point abouve about 350/sup 0/C, said scrubbing liquid being supplied to the scrubbing stage at a rate of about 0.5 to 6 liters per standard cubic meter of raw gas, withdrawing a purified gas with a solids content not exceeding 10 milligrams per standard cubic meter and having an enchanced calorific value and employing it as a fuel for the operation of at least one turbine, withdrawing used scrubbing liquid from said intense scrubbing stage and cooling it by indirect heat exchange in a cooling zone, separating the liquid from said cooling zone in a tar separator into a high-solids heavy phase and a low solids lighter phase, and using said lighter phase as said scrubbing liquid in the intense scrubbing stage.

• Assignee: Metallgesellschaft Ag (Germany, F.R.)
• Patent Number(s): US 4211539
• OSTI ID: 5113462
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010402 -- Coal
Lignite
& Peat-- Purification & Upgrading
010404* -- Coal
Lignite
& Peat-- Gasification
090121 -- Hydrocarbon Fuels-- Chemical Synthesis-- (1976-1989)
10 SYNTHETIC FUELS
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CHALCOGENIDES
COAL GASIFICATION
CONCENTRATORS
CYCLONE SEPARATORS
ELEMENTS
EQUIPMENT
FLUIDS
FUEL GAS
FUELS
GAS FUELS
GASES
GASIFICATION
HIGH BTU GAS
HYDROCARBONS
HYDROGEN
INERTIAL SEPARATORS
MANAGEMENT
MATERIALS RECOVERY
NONMETALS
ORGANIC COMPOUNDS
OXIDES
OXYGEN
OXYGEN COMPOUNDS
POLLUTION CONTROL EQUIPMENT
PROCESSING
PRODUCTION
PURIFICATION
RECOVERY
SCRUBBING
THERMOCHEMICAL PROCESSES
VAPORS
WASTE MANAGEMENT
WASTE PROCESSING
WATER VAPOR