SYSTEM FOR CIRCULATION OF CHARCOAL KILN PYROLYSIS GASES Russian patent published in 2003 - IPC

FIELD: wood chemical industry. SUBSTANCE: gas circulation system has pyrolysis chamber with smoke-stacks, vapor-smoke mixture intake and discharge branch pipes and exhaust fan. Vapor-smoke mixture intake branch pipe for drawing said mixture from pyrolysis chamber is positioned in the vicinity of pyrolysis chamber dome and branch pipe for discharging said mixture into pyrolysis chamber are provided with discharge opening and arranged in the vicinity of hearth, along pyrolysis chamber walls. Said system is designed for heat-exchanging devices of charcoal chamber-type kilns. EFFECT: reduced pyrolysis cycle time and provision for uniform processing of pyrolysis raw material with vapor-gas mixture. 1 dwg