METHOD FOR OPERATING FUEL-GAS-PRODUCING APPARATUS

WIPO Patent Application WO/2018/174276

A1

Provided is a method for operating a fuel-gas-producing apparatus, said method comprising stopping operation in a mode in which operation can be rapidly resumed while suppressing complications in the equipment. When operation is stopped by stopping the supply of a raw material gas, which is a heavy hydrocarbon gas, to a desulfurization unit 3, a temperature-lowering process that circulates a fuel gas G using a circulation drive unit 7 is performed in a state in which the supply of water vapor is continued after the supply of the raw material gas to the desulfurization unit 3 is stopped, and in a mode in which the total amount of the fuel gas G is returned from a modification unit 5 to the desulfurization unit 3 through a circulation gas route R; subsequently, if the temperature of the modification unit 5 falls to less than or equal to a precipitation preventing temperature at which it is possible to prevent the precipitation of carbon arising from the pyrolysis of the fuel gas G, a standby operation process is performed that stops the supply of water vapor, heats the circulated fuel gas G using a heating unit K, and circulates the fuel gas G using the circulation drive unit 7 in a state in which a set standby temperature that is less than or equal to the precipitation prevention temperature and prevents the condensation of water vapor is retained.

ASONUMA HIDAKA (JP)
SHIMIZU TSUBASA (JP)
KANDA TAKAYA (JP)

PCT/JP2018/011888

September 27, 2018

March 23, 2018

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OSAKA GAS CO LTD (JP)

C10L3/08

WO2017150600A1

2017-09-08

JPH0726271A	1995-01-27
JPH04159393A	1992-06-02

R&C IP LAW FIRM (JP)

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