DINITRIFCATION APPARATUS FOR COAL FIRED BOILER

The purpose of the present invention is to achieve uniform diffusion of jetted ammonia gas without lengthening the duct. A denitrification apparatus (1) for a coal fired boiler is provided with a curved duct (20) having a bend section (24) that curves a portion of a flow channel through which exhaus...

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Bibliographic Details
Main Authors ODA, Manabu, TSUTSUMI, Ryuji, TODAKA, Shimpei, MIYANISHI, Hideo
Format Patent
LanguageEnglish
French
German
Published 01.06.2022
Subjects
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
SEPARATION
TRANSPORTING
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Summary:The purpose of the present invention is to achieve uniform diffusion of jetted ammonia gas without lengthening the duct. A denitrification apparatus (1) for a coal fired boiler is provided with a curved duct (20) having a bend section (24) that curves a portion of a flow channel through which exhaust gas flows; and a catalytic reactor (40) connected to the outlet of the curved duct (20), a flow channel of which is provided with a rectifying device (42) with multiple parallel plates, ammonia injection nozzles (44) for jetting ammonia gas, and a catalyst layer (46) and comprises a portion in which the cross-sectional area of the flow channel is roughly constant. The rectifying device (42) and the ammonia injection nozzles (44) are disposed at the inlet of said portion of the catalytic reactor (40) in which the cross-sectional area of the flow channel is roughly constant, located upstream of the catalyst layer (46), and the ammonia injection nozzles (44) are set immediately downstream of the rectifying device (42) so as to continue from the rectifying device (42).
Bibliography:Application Number: EP20180856051