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US 7,842,110 B2Granted
Steam reforming process and apparatus
AssigneeThermoChem Recovery International, Inc.
InventorsMomtaz N. Mansour, Ravi Chandran
Life of this patent
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Abstract
Various processes and systems are disclosed for converting carbonaceous materials into a product gas stream. For instance, the product gas stream may be endothermically converted to a gas through a steam reforming process. The present invention is directed to various methods and systems for increasing throughput and efficiency of the system. Further, the present invention is also directed to sulfur removal methods and systems from a gas stream.
Claims32
A process for producing a product gas having heat or fuel value comprising:
- feeding a carbonaceous material to a fluidized bed located in a first apparatus, the fluidized bed containing particles suspended in a fluid medium, the fluidized bed including a top portion and a bottom portion, the bottom portion being in communication with a solids collection reservoir located below the bottom portion and separate from the first apparatus in which the fluidized bed is located;
- indirectly heating the fluidized bed with a pulse combustion device, a portion of the carbonaceous material fed to the fluidized bed being gasified to form a product gas stream;
- receiving bed solids from the fluidized bed directly into the solids collection reservoir;
- and
- feeding a gaseous medium through the solids collection reservoir and into the bottom portion of the fluidized bed, the gaseous medium comprising an oxygen-containing gas, wherein:
- the solids collection reservoir is maintained at a higher temperature than the fluidized bed;
- and
- a first portion of carbon particles within the bed solids received into the solids collection reservoir is oxidized and a second portion of the carbon particles is endothermically converted to a gas.
5 more elements
A process for producing a product gas having heat or fuel value comprising:
- feeding a carbonaceous material to a fluidized bed located in a first apparatus, the fluidized bed containing particles suspended in a fluid medium, the fluidized bed including a top portion and a bottom portion, the bottom portion being in communication with a solids collection reservoir located below the bottom portion and separate from the first apparatus in which the fluidized bed is located;
- indirectly heating the fluidized bed with a pulse combustion device, a portion of the carbonaceous material fed to the fluidized bed being gasified to form a product gas stream;
- receiving bed solids from the fluidized bed directly into the solids collection reservoir;
- and
- feeding a gaseous medium through the solids collection reservoir and into the bottom portion of the fluidized bed, the gaseous medium comprising an oxygen-containing gas and gasifying carbon particles within the bed solids received into the solids collection reservoir, wherein:
- the solids collection reservoir is maintained at a higher temperature than the fluidized bed.
3 more elements
A process for producing a product gas having heat or fuel value comprising:
- feeding a carbonaceous material to a fluidized bed located in a first apparatus, the fluidized bed containing particles suspended in a fluid medium, the fluidized bed including a top portion and a bottom portion, the bottom portion being in communication with a solids collection reservoir located below the bottom portion and separate from the first apparatus in which the fluidized bed is located;
- indirectly heating the fluidized bed with a pulse combustion device, a portion of the carbonaceous material fed to the fluidized bed being gasified to form a product gas stream;
- receiving bed solids from the fluidized bed directly into the solids collection reservoir;
- and
- feeding a gaseous medium through the solids collection reservoir and into the bottom portion of the fluidized bed, wherein:
- the solids collection reservoir is maintained at a higher temperature than the fluidized bed;
- the particles suspended in the fluidized bed comprise sodium carbonate;
- the fluid medium comprises steam and an oxygen-containing gas;
- the carbonaceous material being fed to the fluidized bed comprises black liquor, a majority of the black liquor being steam reformed in the fluidized bed, and
- a first portion of carbon particles within the bed solids received into the solids collection reservoir is oxidized, and a second portion of the carbon particles is steam reformed.
7 more elements
Dependencies are inferred from the claim text.