Method for pre-heating combustion air and for catalytically reducing noxious substances in flue gas
US4756891A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 16, 1986 |
| Grant date | Jul 12, 1988 |
| Priority date | — |
| Expiry date | Oct 16, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E20/34
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An apparatus and a method of pre-heating combustion air and catalytically reducing noxious substances in flue gas employing a two-part heat-exchanger which is traversed from top to bottom by a plurality of catalytically active separately movable heat-storage elements are described. The combustion gas is heated in a first portion of the heat-exchanger by heat transferred from the heat-storage elements and the noxious gases are catalytically reduced in a second portion of the heat-exchanger downstream from the first portion in the path of the elements in the presence of ammonia and catalytically active heat-storage elements. The catalyst-coated heat-storage elements can be removed from circulation and replaced by unspent or regenerated elements when the residual content of noxious substances in the flue gas remains elevated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.