| 摘要 |
PURPOSE:To stabilize the purity of carbon dioxide produced in a device for producing carbon dioxide, by introducing exhaust gas, raw material gas from blast furnace and by stopping the introduction of the exhaust gas from the blast furnace in switching time by shutting a control valve. CONSTITUTION:With the control instrument 29 receiving the signal in switching time from blast furnaces 21 and 22, when a blast furnace 21 is switched a control valve 25 is shutted and on the other hand, when a blast furnace 22 is switched, a control valve 26 is shutted. For example, when the blast furnace 21 is used with priority it is necessary to interlock with the control device 29, so that usually the valve 25 and 26 are opened and shutted, respectively, but only in switching time, the valves 25 and 26 are shutted and opened, respectively, to open either of these valves, because the amt. of raw material gas used in a usual device 28 for producing carbon dioxide is sufficiently supplied from one blast furnace. Therefore, the concn. of product gas can be kept constant without introducing the exhaust gas from the air-blast stove in the switching time to a device 28. |
