公开(公告)号：US3592610A

公开(公告)日：1971-07-13

申请号：US3592610D

申请日：1969-12-17

Applicant: COMBUSTION ENG

Inventor： FREIDAY JAY H ,  PRHAZKA GEORGE J

IPC: B01J19/00 ,  B01J1/00 ,  F28D19/04

CPC classification number: B01J19/0013

Abstract: IN A CHEMICAL RECOVERY FURNACE SYSTEM INCLUDING A ROTARY REGENERATIVE AIR HEATER AND AN AIR CASCADE EVAPORATOR, THE INCOMING COMBUSTION AIR SUPPLY THEREFOR HAVING BEEN HEATED IN THE AIR HEATER BY THE RECOVERY FURNACE EXHAUST GASES, THE PLACING OF THE FD (FORCED DRAFT) FAN BETWEEN THE CASCADE EVAPORATOR AND THE RECOVERY FURNACE FOR THE PURPOSE OF REDUCING THE AIR-TO-GAS LEAKAGE ACROSS THE MOVING SEALS OF THE AIR HEATER. ALSO, THERE IS PROVIDED A BYPASS MEANS BETWEEN THE EXHAUST OUTLET FROM THE FURNACE AND THE INLET SIDE OF THE AIR CASCADE EVAPORATOR TO, UNDER CERTAIN CONDITIONS, SELECTIVELY FORM A CLOSED

RECIRCULATING HEAT TRANSFER LOOP SO THAT A PORTION OF THE EXHAUST GASES MAY BE RECIRCULATED THROUGH THE AIR CASCADE EVAPORATOR AND BACK INTO THE FURNACE TO COOL THE HOT MOLTEN FURNACE SMELT IN ORDER TO REDUCE THE POSSIBILITY OF A SMELT-WATER REACTION EXPLOSION.