Apparatus for thermal processing of raw materials in dust form
US5704780A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 10, 1995 |
| Grant date | Jan 6, 1998 |
| Priority date | — |
| Expiry date | Oct 10, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P40/121
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A partial flue gas stream is extracted from the rotary kiln of a cement plant. This partial bypass of hot flue gas is passed through a cooler (23) and then passed through a dust collector (24). Fine granular dust (30) from the dust collector (24) is fed directly to a dust collecting vessel. The coarse granular dust (28, 29) from the dust collector (24) is fed to a suspension type cyclone heat exchanger (33) operated directly with cooling air (32) and there cooled by means of direct heat transfer. The heated cooling air (39) extracted from the hot dust cooler (33) by a draft fan (40) is fed to the partial flue gas stream, such as by feeding it to the gas stream cooler (23).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.