Process for preparing fuel gas through graded pyrolysis and gasification of powdered coal
US12305132B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 11, 2024 |
| Grant date | May 20, 2025 |
| Priority date | — |
| Expiry date | Jul 11, 2044 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10J2300/1861
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A process for preparing fuel gas through gasification of powdered coal, comprising: contacting powdered coal and ash residue in a riser reactor under hydrogenation conditions to perform a pyrolysis reaction and a gas-phase tar cracking reaction; subjecting it to a primary gas-solid separation to obtain a gasified gas and a solid fraction; subjecting the gasified gas to a secondary gas-solid separation to obtain a solid fraction containing fine particle semi-coke and a gasified gas; subjecting the solid fraction to a gasification calcination reaction, flowing the gasified coal gas and the high-temperature ash residue u into the riser reactor; subjecting the solid fraction containing fine particle semi-coke to a melting gasification reaction, falling the liquid residue to the material-returning device of fluidized bed for cooling and solidification, and feeding the second high-temperature gasified coal gas to the riser reactor via a high-temperature gasified gas returning pipe.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.