This paper mainly introduces the application of the double Differentialtemperaturecontrol system in the Propylene Distillation tower of the Gas Distillation unit.
本文主要介绍双温差控制系统在气体分馏装置丙烯精馏塔控制上的应用。
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It is consisted of temperature acquisition, temperature setting, temperature display, differential amplifier, PID control circuit, limited circuit and thermoelectric cooler (TEC) Driver.
On the basis of analysis of the temperaturecontrol features of the differential thermal balance, this paper presents two control methods: digital PID and FC digital PID.