FPSO (Floating Production Storage and Offloading) type automatic vacuum sweeping control method

Abstract

The invention relates to an FPSO (Floating Production Storage and Offloading) type automatic vacuum sweeping control method. The method comprises the steps of acquiring detection information of level of liquid in a separating tank through a liquid sensor; acquiring the detection information of vacuum degree through a vacuum degree sensor; feeding the acquired vacuum degree detection information and the separating tank liquid level detection information into a PLC as feedback quantity of the vacuum degree and the feedback quantity of the liquid level of the separating tank; performing data processing and logic analysis for the detection information used as the vacuum degree feedback quantity and separating tank liquid level feedback quantity through the PLC by the closed-loop control algorithm; acquiring accurate vacuum degree feedback quantity and separating tank liquid level feedback quantity for controlling vacuum sweeping according to the function relation between the vacuum degree and the liquid level of the separating tank; controlling a vacuum pump, a vacuum valve and a flow valve through the vacuum degree feedback quantity and the separating tank liquid level feedback quantity for vacuum sweeping through the PLC, so as to realize automatic control of vacuum sweeping.

Description

technical field [0001] The invention relates to the technical field of automatic control, in particular to an FPSO vacuum automatic stripping control method. It is about the control method of cargo oil ballast automatic stripping of FPSO platform. FPSO is the abbreviation of Floating Prouduction Storage&Offloading in English. The Chinese translation of FPSO is: floating production storage and offloading device, which integrates production processing, storage and transportation, life and power supply. The FPSO device is an integral part of the offshore oil and gas development system. Background technique [0002] As far as the applicant knows, the crude oil loading and unloading system equipment on the FPSO platform is still blank in China, but has been used in the development of offshore oil and gas in some advanced and developed countries. As an important part of the FPSO crude oil handling system, the FPSO cargo oil ballast integrated system is of great importance. It i...

AI Technical Summary

Problems solved by technology

Today's FPSO works in the offshore or deep sea, and usually faces harsh and complicated sea conditions. Due to the large shaking of the platform and poor stability, the stability and reliability of its vacuum automatic stripping will be affected to varying degrees. Using the liquid level of the separation tank and the opening of the regulating valve as the feedback to control the regulating valve, vacuum valve and vacuum pump can no longer meet the basic requirements of system control, so it needs to be improved to improve the stability and reliability of its control

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