EXHAUST GAS TREATMENT METHOD, EXHAUST GAS TREATMENT SYSTEM AND SHIP COMPRISING EXHAUST GAS TREATMENT SYSTEM

• Main Authors: KISHI TAKEYUKI, NISHIO SUMITO
• Format: Patent
• Language: English; Japanese
• Published: 01.10.2020
• Subjects: BLASTING; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; 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; THEIR RELEVANT APPARATUS; TRANSPORTING; WEAPONS

To reduce a workload related to drugs required for treating a nitrogen oxide and a sulfur oxide, and effectively remove the nitrogen oxide and the sulfur oxide.SOLUTION: A system that treats a nitrogen oxide and a sulfur oxide contained in exhaust gas discharged from a combustion engine 12, comprises: a denitration device 20 that denitrates the nitrogen oxide contained in the exhaust gas with a selective reduction catalyst using a denitration reductant; an ammonia generation unit 22 that generates ammonia from the denitration reductant using the heat of the exhaust gas after the denitration; and a scrubber 26 that absorbs the sulfur oxide in ammonia water in which ammonia is dissolved in water, to perform desulfurization.SELECTED DRAWING: Figure 1 【課題】窒素酸化物と硫黄酸化物の処理に必要な薬剤に関わる作業量を軽減するとともに、窒素酸化物と硫黄酸化物を効果的に除去する。【解決手段】燃焼機関１２から排出される排ガスに含まれる窒素酸化物および硫黄酸化物を処理するシステムであって、排ガスに含まれる窒素酸化物を、脱硝還元剤を用いて選択的還元触媒により脱硝する脱硝装置２０と、脱硝後に、前記排ガスの熱を用いて前記脱硝還元剤からアンモニアを発生させるアンモニア生成部２２と、アンモニアを水に溶解したアンモニア水に前記硫黄酸化物を吸収させて脱硫を行うスクラバ２６と、を有する。【選択図】図１