Differentialdrucksteuerungsverfahren für Plattenreformer eines Brennstoffzellenstromerzeugungssystems

摘要

The method controls a differential pressure of a plate reformer (9) installed in a fuel cell power generation system. In the power generation system, a raw material gas (NG) is reformed to a fuel gas in the plate reformer (9), the fuel gas is fed to an anode (3) of a fuel cell (FC), an anode exhaust gas from the anode (3) is fed to a combustion chamber (9b) of the plate reformer (9), a combustion exhaust gas from the combustion chamber (9b) is fed to a cathode (2) of the fuel cell (FC) together with an air, and part of the air is fed to the combustion chamber (9b). The method includes the steps of placing the plate reformer (9) in a pressure vessel (24), maintaining a pressure of a cathode exhaust gas to a constant value, feeding part of the air to be fed to the cathode (2) and all of the anode exhaust gas into the combustion chamber (9b) to make a pressure of the air and that of the anode exhaust gas substantially the same so as to make a pressure of the reforming chamber (9a) and that of the combustion chamber (9b) substantially the same, and forming an opening on a line which feeds the air into the combustion chamber (9b) to allow the gas in the line to enter the pressure vessel (24) so as to make the pressure of the reforming chamber (9a), that of the combustion chamber (9b) and that of the pressure vessel (24) substantially the same.