Patent · US Expired

Process of desulfurization

US4876076A · kind A · utility

7Cited by
7References
2Claims
0Family size

Assignee

Inventor

Key dates

Filing dateFeb 10, 1988
Grant dateOct 24, 1989
Priority date—
Expiry dateFeb 10, 2008

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.