Abstract
In this paper, the changes of oxidation temperature of sulfide corrosion and the deficiency of distributed optical fiber application were analyzed. The test platform of oxidation temperature of sulfide corrosion was established, and the performance test of optical fiber and the simulation of oxidation temperature of sulfide corrosion were realized. The hardware part of the control system used STM32 as the controller, the software part was based on the process characteristics of the controlled object, using MATLAB to carry out the simulation of PID, fuzzy, fuzzy PD plus I, fuzzy PID algorithms, and their performance are evaluated using both single indexes and comprehensive indexes. The experimental results also showed that the proposed fuzzy PID can achieve better control performance with less overshoot and shorter setting time. Therefore, the fuzzy PID was chosen as the temperature control algorithm to build the optical fiber sensor test platform, and an alarm method for testing the oxidation temperature of large area sulfide corrosion based on the optical fiber performance was obtained. Then, considering the influence of spatial resolution on optical fiber sensor, this paper used piecewise PID to simulate the temperature rise process of three stages of sulfurization corrosion and oxidation. The results showed that the alarm method of oxidation temperature of sulfurization corrosion has limitations for small-scale oxidation of sulfurization corrosion, and it needed to be combined with machine learning to identify temperature anomaly.
Highlights
The sulfur corrosion and oxidation self-heating of crude oil storage tank is one of the main causes of fire and explosion accidents, which often brings disastrous consequences.[1]
For optical fiber performance test, it is necessary to control the temperature of steel plate at 80°C
Once a large area of sulfide corrosion and oxidation occurs, it is difficult to ensure that the received optical fiber data is the real temperature on the tank
Summary
The sulfur corrosion and oxidation self-heating of crude oil storage tank is one of the main causes of fire and explosion accidents, which often brings disastrous consequences.[1] There are many sulfur-containing substances in crude oil, these sulfur substances have strong corrosion properties and are easy to react with metals. They will slowly corrode the tank wall and floating roof and form complex sulfurized rust.
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