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US 2019/0055487 A1Published application
Integrated process and unit operation for conditioning a soot-containing syngas
AssigneePraxair Technology, Inc.
InventorsLuke Coleman, Minish Mahendra Shah, Joseph Schwartz, Jerome Jankowiak
Life of this patent
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Abstract
The present invention relates to a method for conditioning a soot-containing syngas stream in a single integrated apparatus containing a scrubbing vessel wherein particulate matter is decoupled from the waste water stream.
Claims22
An integrated process for conditioning a soot-containing synthesis gas stream, comprising:
- (a) introducing a raw soot-containing synthesis gas having particulate matter and gaseous contaminants therein at a temperature of less than about 900° F. into a quenching device to reduce the temperature of said synthesis gas to a range of about 250-400° F., thereby forming a two-phase stream;
- (b) routing the two-phase stream through a first scrubber device to substantially transfer majority of particulate matter from the gas phase to the liquid phase;
- (c) directing said two-phase stream to a second scrubbing device wherein the two-phase stream is separated into a water phase fluid contaminated with particulate matter and a gas phase fluid having water-soluble contaminants at a lower section of the scrubbing device;
- (d) cleaning and cooling the gas phase fluid having water-soluble contaminants in an upper section of the second scrubbing device where the gas phase fluid comes in direct contact with process water cooled to a temperature below 150° F. dispensed through a spray nozzle device thereby reducing the temperature of the gas phase fluid below the dew point temperature and removing water soluble impurities and remaining particulate matter therefrom;
- (e) further routing the cooled and cleaned gas phase fluid of step (d) through a mist eliminating device disposed in the upper section of the second scrubbing device to remove substantially all of the remaining entrained water droplets, thereby producing a cooled and substantially soot free synthesis gas stream.
2 more elements
An integrated apparatus for conditioning a soot-containing synthesis gas stream, comprising:
- (a) a quenching device, wherein a raw soot-containing synthesis gas having particulate matter and gaseous contaminants having a temperature of less than 900° F. is introduced and the temperature of the soot-containing synthesis gas is reduced to a temperature ranging from 250−400° F. thereby forming a two-phase stream;
- (b) a first scrubbing device for receiving the cooled two-phase stream, wherein said device is selected from the group of Venturi scrubbers, Venturi tubes, orifice plate, atomizers;
- (c) a second scrubbing device for receiving the two-phase stream where it is separate into a water phase fluid contaminated with particulate matter and a gas phase fluid having water-soluble contaminants at a lower section of the scrubbing device;
- (d) a spray nozzle device disposed in an upper section of the second scrubbing device to clean the gas phase fluid by bringing said gas phase fluid in direct contact with cooled process water dispensed through said spray nozzle device, thereby reducing the temperature of the gas phase fluid below the dew temperature and removing the water-soluble contaminants therefrom;
- (e) a mist eliminating device above the spray nozzle device in the upper section of the second scrubbing device for the removal of substantially all of the remaining entrained water droplets in the gas phase fluid rising to the top of the scrubber device, thereby producing a cooled and substantially soot free synthesis gas stream.
2 more elements
Dependencies are inferred from the claim text.