CARBURIZING GAS SUPPLY SYSTEM AND CARBURIZING SYSTEM

WIPO Patent Application WO/2022/201828

A1

The main purpose of the present invention is to provide a carburizing gas supply system with which it is possible to reduce the carbon dioxide emission amount, to reduce the usage amount of new carburizing gas, and to supply an optimum gas composition in accordance with the state in a furnace.　This carburizing gas supply system comprises: a gas discharge unit that discharges exhaust gas from a carburizing furnace; a first flow rate measurement unit that measures the flow rate of the exhaust gas; a first concentration measurement unit that measures the concentration of components of the exhaust gas; a first supply unit that supplies carbon dioxide to the exhaust gas; a control unit that controls the supply amount of the carbon dioxide on the basis of the flow rate of the exhaust gas and the concentration of the components; a carbon dioxide conversion unit that generates hydrocarbon or carbon monoxide from the carbon dioxide, and removes water or oxygen; and a carburizing gas supply unit that supplies, to the carburizing furnace, regenerated carburizing gas containing components derived from the generated hydrocarbon or carbon monoxide.

GUNJI AKIRA (JP)
YOSHIKAWA KOHEI (JP)
SUGIMASA MASATOSHI (JP)

PCT/JP2022/002544

September 29, 2022

January 25, 2022

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HITACHI LTD (JP)

F27D7/00; B01D53/86; C21D1/06; C21D1/76; C25B1/23; C25B3/03; C25B9/00; C25B15/023; C25B15/08; F27D7/02; F27D17/00; F27D19/00; F27D21/00

JP2002339017A	2002-11-27
JP2017226893A	2017-12-28

HIRAKI & ASSOCIATES (JP)

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