High-temperature and high-pressure multi-phase flow dynamic visualization loop corrosion testing apparatus and method thereof

Abstract

The invention discloses a high-temperature and high-pressure multi-phase flow dynamic visualization loop corrosion testing apparatus and a method thereof. The high-temperature and high-pressure multi-phase flow dynamic visualization loop corrosion testing apparatus comprises a medium displacement unit, an experiment parameter measurement unit, a visualization unit, a corrosion testing unit, a gas inlet valve, a circulation loop, a driving pump, a 1# end cover, a 2# end cover, a gas discharge valve and an H2S absorption device, wherein the experiment parameter measurement unit, the corrosion testing unit, the 1# end cover, the 2# end cover, the gas discharge valve and the H2S absorption device are arranged on the circulation loop, and the medium displacement unit is connected to the circulation loop through the driving pump. According to the present invention, the subcritical and supercritical fluids under the high-temperature and high-pressure environment can be realistically simulated, the shearing force can be measured, the erosion damage effect of the multi-phase flow corrosion medium on the corrosion inhibitor film and the corrosion product film can be quantitatively analyzed, and the online testing of the pipeline corrosion effect can be completed and the results are recorded.

Description

Technical field [0001] The invention relates to a high-temperature and high-pressure multiphase flow dynamic visual loop corrosion test device and method, and belongs to the technical field of petrochemical corrosion protection. Background technique [0002] With the continuous development of my country's oil and gas fields, more and more high-sulfur gas reservoirs have been discovered in China. The biggest difference between high-sulfur natural gas and conventional natural gas is the presence of hydrogen sulfide gas. In the development process of high-sulfur gas, as the gas pressure, temperature, and flow rate change, elemental sulfur will be precipitated in the gas. When elemental sulfur continues to accumulate and become so large that it cannot be carried away by the gas, sulfur deposition will occur. During the operation of surface pipelines, the different components and phases of the conveying medium have different degrees of erosion and corrosion on the surface pipelines a...

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Problems solved by technology

[0005] (1) The method of stirring in the reactor is mainly used to simulate the corrosion effect of the flowing medium on the test piece, which cannot truly reflect the complex flow conditions and scouring effects of the multiphase flow medium in the pipeline;

[0006] (2) It is impossible to truly simulate the scouring damage effect of subcritical and supercritical fluids on the test piece;

[0007] (3) There is a lack of visualization devices, and there is little detailed research on the precipitation methods, conditions and forms

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