ALEXANDRIA, Va., June 25 -- United States Patent no. 12,338,996, issued on June 24, was assigned to VALMET AB (Sundsvall, Sweden).

"System for recovering heat from flue gas, control arrangement for use in such a system and a method performed by such a control arrangement" was invented by Erik Wallin (Kullavik, Sweden).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention relates to a heat recovery system 10, 11, 12 for recovering heat from flue gas generated by combustion at a biomass plant installation. The heat recovery system 10, 11, 12 comprises a flue gas cooler 200 configured to receive flue gas 201 from a combustion and transfer heat from the flue gas 201 to feed water in a heat recovery...