Shaft kilns having fluid-bed air heater
US4626200A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 15, 1985 |
| Grant date | Dec 2, 1986 |
| Priority date | — |
| Expiry date | Jul 15, 2005 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF27B15/02
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
The invention utilizes fluid bed air heaters for burning coarse solid fuels which supply heated gases to annular shaft kilns or double inclined shaft kilns. The solid fuels are introduced into a fluidized bed of inert material, such as sand, alumina or ash, through means of an air lock and the hot gases of combustion pass through a cyclone separator to remove solid materials, which can be reintroduced into the fluidized bed. The hot gases are injected into the kilns to supply heat as needed for calcining or burning limestone or similar materials. Temperature control of the gas leaving the fluid bed air heater and reduced contamination of the burned materials are disclosed advantages of the present invention.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.