DUAL-FUEL ENGINE EXHAUST HEAT RECOVERY APPARATUS AND DUAL-FUEL ENGINE EXHAUST HEAT RECOVERY APPARATUS CONTROL METHOD

• Main Author: UCHIDA ISAO
• Format: Patent
• Language: English; Japanese
• Published: 07.09.2015
• Subjects: BLASTING; COMBUSTION APPARATUS; COMBUSTION PROCESSES; FLUES; HEATING; LIGHTING; MECHANICAL ENGINEERING; METHODS OF STEAM GENERATION; REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTIONRESIDUES; STEAM BOILERS; STEAM GENERATION; WEAPONS

PROBLEM TO BE SOLVED: To appropriately denitrate dual-fuel engine exhaust gas and appropriately recover exhaust heat.SOLUTION: A dual-fuel engine exhaust gas recovery apparatus comprises: a switching damper supplying and distributing dual-fuel engine exhaust gas discharged from a dual-fuel engine to a denitration distribution channel 20 and an exhaust heat recovery distribution channel 19; and a controller controlling the switching damper to change the distribution of the dual-fuel engine exhaust gas to be supplied between the denitration distribution channel 20 and the exhaust heat recovery distribution channel 19 on the basis of fuels used in the dual-fuel engine. The dual-fuel engine exhaust heat recovery apparatus 1 thus configured can appropriately denitrate the dual-fuel engine exhaust gas and appropriately recover exhaust heat from the dual-fuel engine exhaust gas by appropriately distributing the dual-fuel engine exhaust gas to the exhaust heat recovery distribution channel 19 and the denitration distribution channel 20 on the basis of the fuels supplied to the dual-fuel engine, even if the nitrogen oxide concentration of the dual-fuel engine exhaust gas changes. 【課題】混焼エンジン排ガスを適切に脱硝処理し、適切に排熱回収する。【解決手段】混焼エンジンから排気される混焼エンジン排ガスを脱硝用流通経路２０と排熱回収用流通経路１９とに分配供給する切替ダンパと、混焼エンジンで利用される燃料に基づいて脱硝用流通経路２０と排熱回収用流通経路１９とに混焼エンジン排ガスが供給される配分が変化するように切替ダンパを制御する制御装置とを備えている。このような混焼エンジン用排熱回収装置１は、混焼エンジンに供給される燃料に基づいて混焼エンジン排ガスを排熱回収用流通経路１９と脱硝用流通経路２０とに適切に分配することにより、混焼エンジン排ガスの窒素酸化物濃度が変化する場合でも、混焼エンジン排ガスを適切に脱硝処理することができ、混焼エンジン排ガスから排熱を適切に回収することができる。【選択図】図３