BOILER SYSTEM

• Main Authors: KOBAYASHI TATSUKI, OKUBO TOMOHIRO
• Format: Patent
• Language: English; Japanese
• Published: 18.01.2016
• Subjects: AIR; BLASTING; COMBUSTION APPARATUS; COMBUSTION PROCESSES; FEEDING FUEL TO COMBUSTION APPARATUS; HEATING; LIGHTING; MECHANICAL ENGINEERING; METHODS OF STEAM GENERATION; METHODSOR APPARATUS FOR COMBUSTION USING FLUID FUELOR SOLID FUEL SUSPENDED IN; STEAM BOILERS; STEAM GENERATION; WEAPONS

PROBLEM TO BE SOLVED: To provide a boiler system in which even if an existing once-through boiler is supplied with gaseous fuel containing hydrogen gas as a major constituent, the existing once-through boiler can stably combust the gaseous fuel.SOLUTION: A boiler system 1 is provided which comprises a once-through boiler 3 and a fuel supply device 2 for supplying gaseous mixture of hydrogen gas and sub-fuel gas to the once-through boiler 3. The fuel supply device 2 comprises: a hydrogen gas line 21; a sub-fuel gas line 22; a mixing device 23 connected to a downstream side of the hydrogen gas line 21 and a downstream side of the sub-fuel gas line 22; a gaseous mixture line 24 connecting the mixing device with the once-through boiler; and a control device 4 for controlling a supply amount of the sub-fuel gas to be more than 20% or more of the gaseous fuel supplied to the once-through boiler 3. 【課題】既存の貫流ボイラに対して水素ガスを主体とした気体燃料を供給しても安定して燃焼させられるボイラシステムを提供すること。【解決手段】貫流ボイラ３と、水素ガスと副燃料ガスとの混合ガスを貫流ボイラ３に供給する燃料供給装置２と、を備えるボイラシステム１であって、燃料供給装置２は、水素ガスライン２１と、副燃料ガスライン２２と、水素ガスライン２１の下流側及び副燃料ガスライン２２の下流側に接続され混合装置２３と、混合装置と貫流ボイラとを接続する混合ガスライン２４と、副燃料ガスの供給量を貫流ボイラ３に供給される気体燃料の２０％以上に制御する制御装置４と、を備える。【選択図】図１