DCS interlock setpoints for high-vacuum reactors

When setting the interlock alarm values for the DCS (Distributed Control System) of high-vacuum reactors, the following parameters need to be taken into consideration: 1. Pressure of the reactor: It is generally necessary to establish high-pressure and low-pressure alarm values to ensure that the reactor operates within a safe pressure range. 2. Reactor temperature: It is necessary to set high and low temperature alarm values for the reactor, in order to ensure that it operates within an appropriate temperature range and to prevent overheating or undercooling. 3. Pressure and temperature of steam: Steam is the heating medium, and its pressure and temperature also affect the operating conditions of the reaction vessel; therefore, it is necessary to monitor these values and set alarm limits. 4. Physical and chemical parameters of the reactants: such as reaction rate, heat of reaction, concentration of the reactants, etc. The description of the interlock logic in a SIS (Safety Instrumented System) generally consists of the following steps: 1. Monitoring: Monitoring key parameters such as the pressure, temperature, steam pressure, and temperature of the reactor. 2. Detection: When critical parameters are detected to be outside the preset range, the system will trigger an alarm. 3. Execution: The system automatically carries out the corresponding safety actions based on the pre-set response strategies, such as closing valves, stopping heating, releasing pressure, etc. 4. Feedback: The system provides the operator with feedback on the status after performing the secure operation, and records the event. 5. Reset: Once the system status returns to normal, the system is reset automatically or manually to continue monitoring and control. Note that the specific DCS interlock setpoints and SIS interlock logic need to be determined based on the particular process and production conditions, and are closely related to factors such as the design parameters and operating parameters of the reactor, as well as process requirements. .