Automatic control of reactor temperature
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I work in a chemical plant where DCS is available, and I want to achieve automatic control of the heating and cooling of reaction vessels. I would like to know how the experts designed it.
First, how do you control the heating and cooling? Are there any inlet and outlet control valves? If there are such valves, all that’s needed is to make some changes in the configuration by using temperature as a parameter. However, the PID setting needs to be carefully adjusted; controlling two valves simultaneously might be difficult
Bro, if you want to use DCS to automatically control the rise and fall of temperature inside the tank, you need to monitor and adjust the valves and pressure at the inlet and outlet. This requires a certain amount of patience. Of course, you can negotiate with your DCS supplier and ask them to handle the adjustments for you; it’s worth paying for a proper service~
Do the devices used to control heating and cooling have control valves? If there are temperature sensors capable of transmitting signals over long distances inside the axe, then implementing a chain control system would be a good solution= =
Clarify the quantity under accusation and the interference amount. Temperature regulation is rather laggy; considering the use of PID control. Start with an initial setting based on empirical values, then fine-tune it.
The heating of the reaction vessel is controlled by steam supplied to the jacket; currently, the operator in the control room manually adjusts the valve position to achieve heating.
A process should be found to design it. Then hand it over to the instrument to implement it.
Do you use steam to heat it up, and what about cooling it down? Is it using circulating water? Is temperature control done with two control valves?
The temperature control of the reactor needs to be determined based on specific circumstances, as it is related to the materials and the production process; there is no one-size-fits-all approach.
The automatic control of heating and cooling in the reaction vessel needs to be determined based on the size of the vessel and the rate at which temperature rises. Temperature changes are somewhat delayed, so it is generally recommended to use a sequential control system, incorporating the adjustment parameters for the heat source, which enables better control. If temperature changes occur rapidly and promptly, direct temperature control can also be used
Automatic control of temperature rise and fall in the reaction vessel, depending on whether the reaction is exothermic or endothermic Endothermic reaction processes are relatively easy to control, while exothermic reaction processes are more difficult, especially those with strong heat effects. Reactor control initiates the reaction through jacket heating; after the reaction starts, a coolant must be passed through the jacket to remove the heat generated by the reaction. Due to heat transfer via a partition, there is a significant delay. The heating and cooling rates require a ramp wave to be generated within the DCS; it is quite difficult to track the initial stages of heating and cooling, as well as the points at which the heating or cooling process changes direction. Traditional PID control finds it difficult to achieve accurate tracking.