Patent Number: 8,821,686

Title: Method and equipment for treatment of black liquor at pulp mill

Abstract: The invention relates to a method and equipment for treatment of black liquor at a pulp mill in order to recover chemicals and energy contained therein. In the invention, the black liquor is pyrolyzed in a pyrolysis reactor (4), the formed gaseous components are forwarded for utilization and the solids are mixed with water, whereby the formed solids are returned to a lime burning kiln (1) and the sodium-hydroxide-containing liquid is returned to the pulp cooking process.

Inventors: Lehto; Jani (Tampere, FI), Kuukkanen; Kari (Tampere, FI), Honkola; Timo (Kangasala, FI)

Assignee: Valmet Power Oy

International Classification: D21C 11/04 (20060101); D21C 11/06 (20060101); D21C 11/12 (20060101)

Expiration Date: 9/02/12018