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:
Jun. 02, 2009
Filed:
Jan. 19, 2005
Vidar Snekkenes, Karlstad, SE;
Lennart Gustavsson, Karlstad, SE;
Jonas Saetherasen, Karlstad, SE;
Metso Fiber Karlstad AB, Karlstad, SE;
Abstract
A procedure for the continuous cooking of chemical pulp, comprising an impregnation vesseland a digester. The chips are impregnated in the impregnation vesseland are fed after impregnation together with circulation fluid through a transfer lineto a top separatoron the digesterin order to be cooked. A fraction of the circulation fluid is withdrawn at a top separatorand returned to the bottom of the impregnation vesselvia a return line. Black liquor is withdrawn from the digester via a black liquor lineto the impregnation vessel The invention is characterized in that a heat exchangeris arranged between the return lineand the black liquor line. The heat exchangerallows the exchange of heat between the two lines, but does not allow the exchange of fluid. The temperature of the black liquor in the black liquor lineafter passing through the heat exchangerhas been cooled by 10-15 ° C.