FUEL GAS HEATING SYSTEM

A fuel gas heating system is disclosed. The fuel gas heating system includes: an engine unit; a fuel supply unit supplying fuel gas to the engine unit; a fuel heating unit heating fuel gas to be supplied to the engine unit; a gas valve unit placed in a gas valve unit room and controlling a pressure and flow rate of fuel gas to be supplied to the engine unit; a ventilation unit disposed in the gas valve unit room to discharge air circulated through intake of outside air to outside atmosphere; a nitrogen gas supply unit pressurizing nitrogen gas generated by a nitrogen generator and supplying the pressurized nitrogen gas to the fuel heating unit; and a controller controlling the fuel gas heating system.