Method for purification of industrial flue gases
US3953578A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 24, 1973 |
| Grant date | Apr 27, 1976 |
| Priority date | — |
| Expiry date | Jan 24, 1993 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D53/507
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Improved methods and apparatus for the purification of industrial flue gases, combustion products and gaseous effluents before their rejection to the atmosphere, said gases and effluents containing as impurities especially sulfur oxide and also oxides of nitrogen, sulphuric fogs, dust and soot, said method comprising essentially the steps of: extracting the dust from the gaseous fluid to be purified; proceeding to a chemical purification phase of the gaseous fluid by establishing intimate contact between said fluid and an aqueous solution of hydrogen peroxide at a temperature lower than 80.degree.C.; and carrying out a concentration phase by effecting a direct contact between the gases and the liquid of the gaseous effluents in the hot state, and said liquid being constituted by sulphuric acid formed during said purification phase. The chemical purification phase is carried out on the gaseous effluents when these latter are saturated with water and is effected at a temperature between 55.degree. and 65.degree.C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.