| 摘要 |
PURPOSE:To obtain high performance and to prolong the service life by arranging a bypass pipe and changeover valve to a feed pipe and discharge pipe for at least either fuel gas or oxidized gas. CONSTITUTION:Fuel gas is made to flow inside a cell main body 3 by opening a changeover valve 7 and closing a bypass valve 8, and then discharged through a pressure control valve 2. Oxidizing gas is made to flow by opening a changeover valve 10 and closing a bypass valve 11, and then discharged through an adjusting valve 6. In such a case, the part 3a is located at the upper course of the fuel gas and oxidizing gas, thereby the member of the part 3a is damaged at the high temperature while electrolyte becomes in a high concentration and the electrolyte of the part 3c is diluted by generated steam so as to become in a low concentration. Thereafter, by closing the changeover valves 7 and 10 for the fuel gas and oxidizing gas and opening the bypass valves 8 and 11, respective gases flow through the bypass pipes 9 and 12 so as to be separated into upper and lower courses. Therefore, the high temperature damage portion is shifted to the part 3c and the electrolyte in a high concentration at the part 3a is diluted by generated steam and then the electrolyte in a low concentration at the part 3c becomes in a high concentration. |
