HEATING GAS GENERATION DEVICE FOR DENITRATION DEVICE OF INTERNAL COMBUSTION ENGINE AND OPERATION METHOD THEREOF

• Main Authors: HIGAMI SHINICHI, SATO KENJI, YASUDA HIROFUMI, KOBAYASHI MASATERU
• Format: Patent
• Language: English; Japanese
• Published: 22.11.2018
• Subjects: BLASTING; ENGINE PLANTS IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNALCOMBUSTION ENGINES; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES ORENGINES IN GENERAL; HEATING; LIGHTING; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; STEAM ENGINES; TRANSPORTING; WEAPONS

PROBLEM TO BE SOLVED: To enable function of denitration catalyst for decomposing a nitrogen oxide.SOLUTION: A heating gas generation device for a denitration device of an internal combustion engine includes: a denitration catalyst 21 provided in an exhaust gas passage of an engine 11; a supply nozzle 22 provided on an upstream side of the denitration catalyst 21, and configured to supply reductant to the denitration catalyst 21; and a heating unit 30 having a burner device 31 for supplying heating gas to the exhaust gas passage. The heating unit 30 includes a mixed air introduction pipe conduit 36 configured to introduce outside air to the exhaust gas passage. The heating unit 30 is arranged on an upstream side of the supply nozzle 22.SELECTED DRAWING: Figure 1 【課題】窒素酸化物を分解するための脱硝触媒の機能を有効化できるようにすること。【解決手段】エンジン１１の排ガス経路に設けられた脱硝触媒２１と、その脱硝触媒２１の上流側に設けられ、その脱硝触媒２１に対して還元剤を供給する供給ノズル２２と、排ガス経路に対して加熱ガスを送給するためのバーナ装置３１を含む加熱ユニット３０とが備えられる。加熱ユニット３０には、排ガス経路内に外気を導入するための混合空気導入管路３６が備えられる。加熱ユニット３０が前記供給ノズル２２の上流側に配置される。【選択図】図１