Fluidized bed
US4392814A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 4, 1980 |
| Grant date | Jul 12, 1983 |
| Priority date | — |
| Expiry date | Jun 4, 2000 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2208/00548
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
This invention relates to a fluidized bed for use in heat treating articles, the bed having a container for containing a mass of refractory particles. The container has a porous base and a supply pipe for supplying a fluidizing gas to the underside of the porous base from which the gas will flow through the porous base and into the mass of refractory particles. The fluidizing gas flows through an adjustable control valve arranged in the supply pipe. There are also provided at vertically spaced positions above the upper surface of the porous base a pair of temperature transducers which are connected together to provide a signal which is dependent upon the difference in the temperatures at the vertically spaced positions, there being also provided power actuated means in the form of an electric motor which in use is arranged to receive the signal from the temperature transducers and then actuate the adjustable valve in accordance with the signal received.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.