DENITRATION EQUIPMENT AND CATALYTIC EXCHANGE METHOD

• Main Authors: MASUDA TOMOTSUGU, OGASAWARA TORU, ISHIZAKI MASANORI, KIYOSAWA MASASHI
• Format: Patent
• Language: English; Japanese
• Published: 10.12.2015
• Subjects: BLASTING; COMBUSTION APPARATUS; COMBUSTION PROCESSES; FLUES; HEATING; LIGHTING; MECHANICAL ENGINEERING; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTIONRESIDUES; SEPARATION; TRANSPORTING; WEAPONS

PROBLEM TO BE SOLVED: To provide denitration equipment capable of efficiently removing nitrogen oxides for a longer period of time, or a catalytic exchange method.SOLUTION: Denitration equipment includes: an exhaust gas passage 40f through which exhaust gas flows; a flow-straightening and denitration catalyst layer 80 that is installed in the exhaust gas passage 40f; and at least one of denitration catalyst layers 82, 84 and 86 that are arranged on the flow-direction downstream side of the exhaust gas with respect to the flow-straightening and denitration catalyst layer 80 of the exhaust gas passage 40f. The flow-straightening and denitration catalyst layer 80 is shorter in length in the flow direction of the exhaust gas than the denitration catalyst layers 82, 84 and 86. 【課題】より長い期間、効率よく窒素酸化物を除去できる脱硝設備または触媒の交換方法を提供することにある。【解決手段】排ガスが流動する排ガス通路４０ｆと、排ガス通路４０ｆに設置された整流兼脱硝触媒層８０と、排ガス通路４０ｆの整流兼脱硝触媒層８０よりも排ガスの流れ方向下流側に配置された少なくとも１層の脱硝触媒層８２、８４、８６と、を有し、整流兼脱硝触媒層８０は、排ガスの流れ方向における長さが、脱硝触媒層８２、８４、８６よりも短い。【選択図】図２