Skid-mounted dew point corrosion test device and use method thereof

Abstract

The invention discloses a skid-mounted dew point corrosion test device and a using method thereof. The device comprises a flow control unit, a mixed heating unit, a vacuumizing unit, a waste gas treatment unit and a control unit, and the flow control unit is connected with the mixed heating unit; the flow control unit is used for injecting CO2, HCL, H2S, N2 and water vapor into the mixed heating unit according to a rated proportion; the mixed heating unit is used for providing an experiment environment with a proper temperature for an experiment medium; and the vacuumizing unit is connected with the mixed heating unit and is used for vacuumizing the device pipeline and the reaction kettle cavity after the experiment is finished and discharging residual mixed gas from the system. The test device can simulate a hydrochloric acid dew point environment, can study the corrosion resistance of steel suitable for the hydrochloric acid dew point environment, and is high in measurement precision.

Description

technical field [0001] The invention relates to the technical field of devices for testing the corrosion resistance of materials, in particular to a skid-mounted dew point corrosion test device and a method for using the same. Background technique [0002] At present, the incoming crude oil in the oil refining industry in the world contains more or less chlorine, mainly in the form of residual water in crude oil and inorganic chlorine salts (mainly) or organic chlorine in crude oil. It will produce hydrogen chloride produced by hydrolysis reaction in the high temperature environment in oil refining, and when the temperature drops, it will dissolve in the trace liquid phase water environment after initial condensation to produce hydrochloric acid, and hydrochloric acid dew point corrosion will occur. Hydrochloric acid dew point corrosion occurs frequently and in the "three tops" (initial distillation / flash top line, atmospheric distillation top line, vacuum distillation top l...

AI Technical Summary

Problems solved by technology

However, there are three difficulties in recreating the actual engineering environment through the simulation device, which leads to the lack of a suitable simulation device: first, the atmosphere in the real working condition is very complicated, and the temperature drops to the initial condensation of water from the gas phase to the liquid phase After the point, not only the phase change of water occurs, but the main dissolved corrosion components include not only hydrogen chloride that produces hydrochloric acid, but also hydrogen sulfide and some light oil, which have a great impact on corrosion

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