| 摘要 |
PURPOSE:To obtain a reformed gas with high efficiency by measuring the temp. of each reformer tube to control the amt. of combustion gas, and measuring the pressure of each reformer tube to regulate the amt. of reformed gas. CONSTITUTION:Combustion gas and air are supplied from each combustion gas line 22 and combustion air line 23 into a combustion chamber 3, and burned to heat each reformer tube 6. The tube temp. of each reformer tube 6 is measured by a temp. measuring element 15, and the mean temp. is determined. The opening degree of each combustion gas regulating valve 24 is respectively controlled to nullify the deviation between the measured temp. and the mean temp. The opening degree of a gas supply regulating valve 31 of a common line 32 is also controlled. Meanwhile, the pressure of each reformed gas line 26 is measured with a pressure measuring element 29, and the measured pressure difference and the allowable pressure difference are respectively compared to respectively regulate the opening degree of each reformed gas regulating valve 28 provided to the reformed gas line 26. The damage of the reformer tube 6 due to heat is prevented in this way, and the reforming efficiency at each reformer tube 6 is increased. |
