EXHAUST EMISSION CONTROL DEVICE AND OPERATING METHOD THEREOF

• Main Authors: HIRAIWA SHUNSUKE, TANAKA HIRONAKA, KOBAYASHI RYOHEI
• Format: Patent
• Language: English; Japanese
• Published: 02.11.2015
• 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 attain a space-saving state and effectively remove dust adhered to a catalyst surface.SOLUTION: Catalyst units 13F, 13R each of which has an upstream side catalyzer 12F and a downstream side catalyzer 12R and in each of which a clearances 14 for generating turbulent flow caused by fast expansion of flow passage is formed between the upstream side catalyzer 12F and the downstream side catalyzer 12R, are installed in an upstream segment and a downstream segment, respectively in a reaction container 11. An upstream soot blow device 15F for injecting soot blow gas along exhaust gas G toward the upstream side catalyzer 12F is provided upstream from the upstream segment catalyst unit 13F. A downstream soot blow device 15R for injecting soot blow gas along a reversing direction of exhaust gas toward the downstream side catalyzer 12R is provided downstream from the downstream segment catalyst unit 13R. A complex soot blow device 15M for injecting soot blow gas toward the downstream side catalyzer 12R of the upstream segment catalyst unit 13F and the upstream side catalyzer 12F of the downstream segment catalyst units 13R, respectively is provided between the upstream segment catalyst units 13F and the downstream segment catalyst units 13R. 【課題】省スペース化が図れ、触媒表面に付着したダストを効果的に除去する。【解決手段】反応容器１１内に、上流側の触媒体１２Ｆと下流側の触媒体１２Ｒの間に、流路の急拡大により乱流を発生させる空隙１４を形成した触媒ユニット１３Ｆ，１３Ｒを上流部と下流部に設置し、上流部触媒ユニット１３Ｆの上流に、スートブローガスを排ガスＧに沿って上流側の触媒体１２Ｆに噴射する上流スートブロー装置１５Ｆを設け、下流部触媒ユニット１３Ｒの下流側に、スートブローガスを排ガスの逆方向に向かって下流側の触媒体１２Ｒに向かって噴射する下流スートブロー装置１５Ｒを設け、上流部触媒ユニット１３Ｆと下流部触媒ユニット１３Ｒの間に、上流部触媒ユニット１３の下流側の触媒体１２Ｒと下流部触媒ユニット１３Ｒの上流側の触媒体１２Ｆに向かってそれぞれスートブローガスを噴射する複合スートブロー装置１５Ｍを設けた。【選択図】図１