Ihi Corporation

Hiroaki Ohara

Koki Hamada

Toshiyuki Suda

Toshiro Fujimori

Yoshiaki Matsuzawa

A gasified gas production system of the present disclosure includes a gasification furnace which produces a gasified gas by gasifying a gasification raw material, a flow passage through which the gasified gas produced in the gasification furnace flows, a catalyst-holding unit which holds a catalyst which promotes reforming of tar included in the gasified gas inside the flow passage, and an oxidation agent supply unit which supplies an oxidation agent with a temperature of 200&#xb0; C. to 900&#xb0; C. to the catalyst.

Gasified gas production system

Ammonia off-gas, which is separated and recovered by an ammonia recovery device from gasification gas produced in a gasification furnace in a two-column gasification system, is injected as reducing agent for denitration into an inlet of a cyclone for separation of bed material heated in a combustion furnace from combustion exhaust gas and for returning the bed material to the gasification furnace. The ammonia off-gas is contacted with the high-temperatured combustion exhaust gas to reduce and remove NOthrough non-catalytic decomposition. Any excess of the ammonia off-gas is distributed for burning to primary air to the combustion furnace.

Method and device for treating ammonia in gasification system

Reforming of a gasification gas is performed by supplying both a tar-containing gasification gas and oxygen to a reforming furnace and burning a part of the gasification gas to heat an inside of the reforming furnace to a target reforming temperature required for reforming. Oxygenand a first stage gasification gasare supplied to a reforming furnace at an end of the furnace in amounts so as to attain the target reforming temperature required for reforming by combustion of the gasification gas with the oxygen to form a heating zone A in the reforming furnace. The remaining gasification gas is supplied as second stage gasification gasto a vicinity downstream of the heating zone A in the reforming furnaceto form a reforming zone B.

Process and equipment for reforming gasification gas

In a circulating fluidized-bed gasification system, an ammonia-off gasfrom an ammonia removeris fed to a catalytic denitratorwith a flow rate regulated such that a molar ratio of the ammonia in the ammonia off-gasfrom the ammonia recoverto nitrogen oxides in an exhaust gasfrom a combustion furnaceis kept within a setting range, and a reminder of the ammonia off-gasis fed to the combustion furnace

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Tokyo, Japan

Hiroaki Ohara