The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 06, 1982
Filed:
Jun. 10, 1980
Tapio Ritvanen, Turku, FI;
Oy Wartsila Ab, Helsinki, FI;
Abstract
A method for treating gaseous combustion products, in particular, combustion products containing sulphur dioxide and smoke gases. The combustion products are led to a scrubber in which they are brought into contact with scrubbing water, into which a base, preferably calcium hydroxide, has been added for obtaining suitable neutralization of the acids created in the scrubber. The scrubbing water is sprayed into the gaseous combustion products, preferably in the form of a finely divided mist, and after the scrubbing operation the combustion products are led through a heat exchanger for cooling and for recovery of condensation water. The scrubbing water used and the condensation water are collected in a settling tank, at the bottom of which solid impurities are caused to settle for removal at suitable intervals. The purified surplus water is led from the settling tank and is reintroduced into the scrubber. The amount of base mixed into the scrubbing water for converting the acids created in the scrubber into settling salts, is so chosen, that the pH value of the liquid in the settling tank is 7-10, preferably 8-9.