Loop test device for imitating gas phase erosion corrosion of natural gas

Abstract

The invention discloses a loop test device for imitating gas phase erosion corrosion of natural gas, and belongs to the technical field of imitating experiment devices. The loop test device for imitating gas phase erosion corrosion of natural gas is suitable for imitating conditions of medium components, humidity, flow speed and the like of natural gas gathering pipelines during the actual operation process, and is especially suitable for simulating the erosion corrosion situation caused by the flowing of gases containing trace moisture and corrosion media and having high-speed flowing in natural gas pipes, and testing electrochemistry and corrosion behaviors. The device is composed of three parts including a control system, a test system and a recovery system, wherein the control system comprises a high-pressure air bottle, a high-pressure kettle, a high-pressure flow meter, a regulating valve, a stop valve, an electric heater, a humidity probe, a pressure probe and pipelines; the test system comprises the high-pressure kettle, a three-electrode system, a rotary working bench, a test sample jig and a pressure probe; and the recovery system comprises a recovery tank, a regulating valve, a high-pressure flowmeter and a pressure probe. The device can well imitate the erosion corrosion situation of parts including pipe walls, elbows, tee joints and reducing parts by high-flow-speed wet gases under natural gas intra-pipe environment, can test electrochemistry signals, and has important significances for the research on erosion corrosion behavior rules under the natural gas intra-pipe environment as well as main influence factors of the erosion corrosion behavior rules.

Description

technical field [0001] The invention belongs to the technical field of simulation experiment devices, and in particular provides a circuit test device for simulating natural gas gas phase erosion corrosion. It is suitable for simulating the conditions of medium composition, humidity and flow velocity of natural gas gathering and transportation pipelines during actual operation, especially for simulating the erosion and corrosion caused by the high-speed flow of gas containing trace moisture and corrosive media in natural gas pipelines. Electrochemical and corrosion behavior tests can be used to study the law of erosion corrosion behavior and its main influencing factors in the natural gas pipeline environment. Background technique [0002] The transmission medium of natural gas transmission pipelines, especially gathering pipelines, contains varying degrees of CO 2 、H 2 S, H 2 O, under the action of the flow rate, these substances can cause erosion and corrosion to the pi...

AI Technical Summary

Problems solved by technology

However, there is currently a lack of professional experimental equipment for these situations to carry out targeted analysis and research and development of anti-corrosion processes

Most of the circuit devices for simulating erosion and corrosion in existing laboratories are liquid-phase erosion circuits, which cannot simulate the erosion and corrosion caused by the high-speed flow of gas containing trace moisture and corrosive media in natural gas pipes, and conduct electrochemical and corrosion behavior tests. The mechanism and law of erosion corrosion phenomena in the atmosphere of natural gas pipes cannot be effectively evaluated, and the erosion corrosion resistance of materials cannot be effectively evaluated.

Images