Diagnosis and analysis of abnormal shutdown fault of indirect electric heater controlled by PID and its countermeasures
The electric heating tube of electric heaters does not direct contact with the fluid,transferring the heat through the heat transfer oil and sleeve.This method has the advantages of corrosion resistance,good sealing,and long equipment life.The indirect heater was first applied to the offshore oil production platform in the Beibu Gulf,resulting in the over-temperature shutdown of the equipment due to excessive flow fluctuations during the commissioning and operation phase.Based on the actual usage in the platform,this paper analyzes this problem from both the equipment principle and control system aspects and proposes a solution relying on the adjustment of the output power of the equipment and all parameters of the PID controller,accurately and stably controlling the outlet temperature of the well fluid.Moreover,this solution can effectively regulate the internal temperature of the equipment to ensure smooth operation and more accurate temperature control.
PID controlindirect heaterflow fluctuationover-temperature shutdowncontrol system
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