| 摘要 |
PROBLEM TO BE SOLVED: To prevent liquid junction phenomenon and scale generation by sensing the concentration of impurities in cooling water, and giving a degree-of-opening command to a blow water control valve furnished in a blow water system. SOLUTION: Impurities in a cooling water are condensed gradually in the process that the steam separated by a water-vapor separator 4 is supplied to a fuel reforming device 2, and in the course of operation, the concentration of the impurities in the cooling water rises gradually. The concentration is is sensed by a sensor 21 for measuring electroconductivity and a sensor 22 for silica concentration, and a degree-of-opening command 23S is given to a blow water control valve 28 from a control part 23 when either of the sensing values exceeds the reference value, and thereupon the rate of the flow of blow water 10C is controlled. The pure water 10E obtained by a purifying device 6 is fed back to the separator 4 to dilute the concentration of the impurities contained in the cooling water. |
