Patent · US Expired

Apparatus for desulfurization

US4990315A · kind A · utility

5Cited by
8References
3Claims
0Family size

Assignee

Inventor

Key dates

Filing dateSep 25, 1989
Grant dateFeb 5, 1991
Priority date—
Expiry dateSep 25, 2009

Classification

  • Technology area (CPC C)Chemistry; Metallurgy
  • CPC primaryC01P2004/61
  • WIPO fieldChemical engineering
  • WIPO sectorChemistry

Abstract

In the desulfurization of flue gas utilizing limestone as absorbent in a double loop system, in which the flue gas is introduced into a quenching zone for contact with a first slurry of the limestone, and thereafter passes to an absorbing zone for further contact with a second limestone slurry, the two slurries being supplied from a mixing zone into which water and limestone are charged, and in which air is introduced into the quenching zone to convert the calcium sulfite present in it to gypsum, air is also supplied to the mixing zone to convert calcium sulfite in it to gypsum, and limestone is directly added to the quenching zone.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.