FUEL CELL SYSTEM

• Main Authors: OSADA YASUHIRO, TAMURA TAKAHIRO, INAGAKI REONA
• Format: Patent
• Language: English; Japanese
• Published: 20.10.2023
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

To provide a fuel cell system capable of heating a desulfurizer until a temperature for stable removal of sulfur components.SOLUTION: A fuel cell system includes a fuel supply channel 30, a water evaporator 42 for vaporizing water by using the heat of exhaust gas generated by a combustor 73, a reformer 33, a water amount adjuster 41 for adjusting the amount of water to be supplied to the water evaporator, a desulfurizer 32 for removing sulfur components contained in fuel, and a control device 100 for controlling the water amount adjuster. When a desulfurizer temperature detected by a temperature detector 321 is equal to a predetermined temperature or less, the control device controls the water amount adjuster so that the amount of water to be supplied to the water evaporator is reduced. Alternatively, the fuel cell system includes an air supply channel 20, an air preheater 22 for heating air by using the heat of the exhaust gas, and an air amount adjuster 21 for adjusting the amount of air to be supplied to the air preheater. The control device controls the air amount adjuster so that the amount of air to be supplied to the air preheater is reduced when the desulfurizer temperature is equal to a predetermined temperature or less.SELECTED DRAWING: Figure 1 【課題】安定的な硫黄成分の除去を行うための温度まで脱硫器を加熱可能な燃料電池システムを提供すること。【解決手段】燃料電池システムは、燃料供給流路３０と、燃焼器７３が生成した排ガスの熱を利用して水を気化させる水蒸発器４２と、改質器３３と、水蒸発器への水の供給量を調整する水量調整部４１と、燃料に含まれる硫黄成分を除去する脱硫器３２と、水量調整部を制御する制御装置１００と、を備える。制御装置は、温度検出部３２１が検出する脱硫器温度が所定温度以下の場合、水蒸発器へ供給される水の供給量が減少するように水量調整部を制御する。または、燃料電池システムは、空気供給流路２０と、排ガスの熱を利用して空気を加熱する空気予熱器２２と、空気予熱器への空気の供給量を調整する空気量調整部２１と、を備える。制御装置は、脱硫器温度が所定温度以下の場合、空気予熱器へ供給される空気の供給量が減少するように空気量調整部を制御する。【選択図】図１