Convective heater
US4422411A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 29, 1981 |
| Grant date | Dec 27, 1983 |
| Priority date | — |
| Expiry date | May 29, 2001 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF28D7/085
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A convective heater for heating fluids such as a coal slurry is constructed of a tube circuit arrangement which obtains an optimum temperature distribution to give a relatively constant slurry film temperature. The heater is constructed to divide the heating gas flow into two equal paths and the tube circuit for the slurry is arranged to provide a mixed flow configuration whereby the slurry passes through the two heating gas paths in successive co-current, counter-current and co-current flow relative to the heating gas flow. This arrangement permits the utilization of minimum surface area for a given maximum film temperature of the slurry consistent with the prevention of coke formation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.