High temperature furnace
US5297959A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 15, 1993 |
| Grant date | Mar 29, 1994 |
| Priority date | — |
| Expiry date | Apr 15, 2013 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF27B3/26
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A high temperature, low NO.sub.x industrial furnace uses coal-fired burners placed in an arcuate heat track conduit which heats an arcuately configured wall member extending through an opening in the heat track conduit. The heated portion of the wall member rotates out of the heat track conduit to indirectly heat a bundle or bank of heat exchange tubes while an unheated wall portion moves into the opening vacated by the heated wall portion. The regenerative heated wall member thus permits the heat exchange tube bundle to be heated to high temperature without exposure to the burner products of combustion. The coal-fired burners are operated substoichiometrically to produce combustibles and a free-standing, jet entrainment arrangement is utilized to achieve staged combustion to avoid NO.sub.x formation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.