I have a question: why does the steam control valve on the steam heating pipeline keep adjusting either resulting in over-temperature or insufficient adjustment?
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I have a question: why does the steam control valve on the steam heating pipeline keep adjusting either resulting in over-temperature or insufficient adjustment? Is there any way? ? Is the temperature control stable under your operating conditions? Thank you
Temperature conditions inherently have a lag, and they can be adjusted by correlating them with flow rate or pressure
Do you mean cascade control? ?
There is a temperature lag, and in addition, the PID parameters of your control valve are not set properly
There are two possible reasons for the situation you described: one is the adjustment method, and the other is the type of control valve as well as its diameter. The diameter should be selected based on the amount of steam required under stable heating conditions. Meets the required adjustment accuracy.
If the air supply is unstable, an energy storage tank can be added
First, adjust the PID parameters; if that doesn’t work, try modifying the valve flow rate
To sum it up, it’s already very detailed. The steam pressure should not fluctuate significantly; a proper PID setting, along with restrictions on the steam valve position, is necessary. If the load requirement is not met, replace the reboiler. Provide a reasonable value for the condensate pressure.
Firstly, it is necessary to ensure that there is no condensed water in the steam pipeline system; water removal procedures should be strengthened. Secondly, the steam pressure in the pipeline system must be kept stable. Additionally, it is important to check whether the PID control parameters are appropriate; if not, manual adjustment may be required