| 摘要 |
Devices for breaking down a gas mixture by means of an absorbent permit the production of an enriched product, e.g. oxygen for technical processes or for ventilation. During the operation, the device is switched periodically between two operating stages, in which the gas mixture is fed to one of two tanks with absorbent, while the other is regenerated at the same time. The charging of the absorbent becomes clear with the pressure rise in the gas mixture in front of the tanks. As a characteristic curve is considered the hyperbola p=K/T with K as a system constant p as the optimum adsorption pressure, and T as the optimum adsorption time. In the control, a timing unit releases a multiplier in which the value K/T is constantly formed, which corresponds then to the respective time related optimum adsorption pressure. In a comparator, this signal is compared with the signal of a sensor in the gas mixture in front of the tanks. In case of agreements, the tanks are switched on the characteristic curve. An alarm device indicates troubles of the device.
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