Method and apparatus for burning damp oil-shales of low heating power
US4429646A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 17, 1982 |
| Grant date | Feb 7, 1984 |
| Priority date | — |
| Expiry date | Jun 17, 2002 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF23K1/00
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
The oil-shale is burned in a combustion chamber (24) having a chimney, and the method comprises: PA1 providing a drying gas by mixing hot gas taken from the combustion chamber via a duct (4) with relatively cool gas taken from the chimney via a duct (5), the proportions of said gasses being adjusted as a function quantity of water in said damp shale; PA1 crushing lumps of said shale in a crusher (6) and in the presence said drying gas; PA1 injecting the resulting grains of crushed shale together with the hot gas into an expansion chamber (8) in which the major portion of the grains falls out from the drying gas, while the lightest portion of grains is entrained by the gas; PA1 passing the drying gas together with said lightest portion of grains entrained thereby via a duct (9) through filter means (10) to separate said lightest portion of grains from the drying gas; PA1 riddling said major portion of the grains (at 17A, 17B) to provide a larger grain fraction and a smaller grain fraction; PA1 recycling said larger grain fraction via a duct (19) through said crusher; PA1 combining said smaller grain fraction with the said lightest portion of grains separated by said filter means (at…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.