Fuel cell discharge-gas processing device

A fuel cell discharge-gas processing device comprising:

• an anode off-gas introduction path which introduces an anode off-gas discharged from an anode of a fuel cell;
• a dilution container which is connected to the anode off-gas introduction path, and into which the anode off-gas is introduced;
• and
• a bypass path which branches off from a cathode gas supply path for supplying a cathode gas to a cathode of the fuel cell, and is connected to the dilution container so as to bypass the fuel cell, wherein
• while the fuel cell is in operation, the cathode gas supplied from the bypass path into the dilution container is discharged to an exterior of the dilution container, wherein
• the fuel cell discharge-gas processing device further comprises a venting gas supply path which supplies the cathode gas for venting from an upstream side of the fuel cell to the dilution container, and wherein
• the venting gas supply path includes:
• a branching portion which branches off from the bypass path and has an inner diameter larger than an inner diameter of the bypass path;
• and
• a valve provided on the branching portion.