Process for removing a constituent from a hot gas stream by exothermic ionic reaction of the constituent with a reactant provided in fine particulate form
US4927613A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 4, 1989 |
| Grant date | May 22, 1990 |
| Priority date | — |
| Expiry date | Oct 4, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D53/504
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A process for causing gaseous trace element particles to pass from a flowing hot gas into a fine particulate material by means of water. A mixture of the hot gas and water drops is caused to flow substantially upwards at such a velocity that the water drops remain in the gas flow and for a period long enough for most of the mass of the water drops to evaporate in order to cool the gas and to increase its relative humidity. After the gases have reached their wet temperature, they are brought into a turbulent state in order to cause the dust particles and the water drops which have decreased through evaporation to impinge against each other in order to produce in the aqueous film which covers the dust particles an exothermal ion reaction between the gaseous water-soluble trace element particles and the fine particles. Thereafter, the mixture is caused to flow further in order to evaporate the remaining water by means of the heat of reaction so that a dry end product is obtained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.