PROBLEM TO BE SOLVED: To provide an exhaust gas purification method suitable for a ship.SOLUTION: A ship mounts an engine 1, a water production machine 21 for making fresh water from sea water, and a water tank 22 for storing water produced by the water production machine 21. A reducer solution produced by mixing a solid-state raw material reducer and water, is sprayed to a reduction catalyst 10 disposed on an exhaust pipe 8 of the engine 1, thereby nitrogen oxide included in the exhaust gas of the engine 1 is purified. An exhaust gas purification method comprises a production step of producing the reducer solution having reducer concentration corresponding to high nitrogen oxide concentration which is assumed in the exhaust gas, and a dilution step of supplying water from the water tank 22 and diluting the reducer solution so that concentration of the reducer solution becomes reducer concentration required for purification.SELECTED DRAWING: Figure 1
【課題】船舶に好適な排気ガス浄化方法を提供する。【解決手段】船舶は、エンジン1と、海水を真水化する造水機21と、造水機21で造られた水を貯める水タンク22とを搭載する。固体状の原料還元剤を水に混合して製造された還元剤水溶液をエンジン1の排気管8に設けた還元触媒10に噴霧することによって、エンジン1の排気ガス中に含まれる窒素酸化物を浄化する。排気ガス中において想定される高い窒素酸化物濃度に対応した還元剤濃度の還元剤水溶液を製造する製造工程と、還元剤水溶液が浄化に必要な還元剤濃度になるように水タンク22から水を供給して還元剤水溶液を希釈する希釈工程とを含む。【選択図】図1
EXHAUST GAS PURIFICATION DEVICE ON SHIP
船舶における排気ガス浄化装置
2016-09-08
Patent
Elektronische Ressource
Japanisch
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