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Liquid-solid two-phase flow pipeline erosion corrosion test device

A technology for scouring corrosion and testing devices, which is used in measurement devices, weather resistance/light resistance/corrosion resistance, and wear resistance testing. achieve the effect of simple structure

Pending Publication Date: 2021-08-31
725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the test devices for experimental research on erosion corrosion include rotary erosion test equipment, jet flow erosion test equipment and pipe flow erosion test equipment: the rotary erosion test equipment is mainly aimed at liquid-solid two-phase flow, and the amount of solution used for testing Small size, simple operation, short test cycle and high stability, but the slurry concentration is uneven, eddy current is easy to occur, and the data reliability is low; the jet flushing device can well control parameters such as impact velocity, particle attack angle and particle concentration , but it cannot simulate the actual working conditions very well, and the erosion corrosion effect is more serious than the actual situation; the pipe flow erosion corrosion test device can well simulate the actual working conditions in the pipe and is supported by a good hydrodynamic model, but it is rarely considered Vibration conditions
In addition, the erosion corrosion rate test of the pipe elbow is mainly to test the weight loss of the entire elbow or select a few measuring points on the center line of the outer arch of the elbow and the 45° position of the elbow to measure the weight loss of the sample, and it is impossible to obtain the weight loss of the entire elbow. There is little research on the erosion corrosion test of the straight pipe near the elbow.
Due to the limitations of measurement technology, test cost and the characteristics of seawater-sand two-phase flow, there is no device in the existing technology and literature that can measure the erosion and corrosion test of liquid-solid two-phase flow in a vibrating environment.

Method used

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Experimental program
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Embodiment 1

[0020] The main structure of the liquid-solid two-phase flow pipeline erosion corrosion test device involved in this embodiment is as follows: figure 1 As shown, it includes water tank 1, experimental pipeline 2, vibration platform 3, test elbow 4, agitator 5, ball valve 6, corrosion-resistant and wear-resistant pump 7, check valve 8, electromagnetic flowmeter 9, diaphragm pressure gauge 10, electric A chemical workstation 11 and a sampling valve 12; among them, the water tank 1 and the agitator 5 cooperate to form a medium storage and mixing system to provide a continuous and stable liquid-solid two-phase flow medium; the visual experimental pipeline 2, the test elbow 4, and the ball valve 6 are equipped with The anti-corrosion and wear-resistant pump 7, the check valve 8 and the sampling valve 12 of the frequency conversion motor that can transport solid particles cooperate to form a liquid-solid two-phase flow conveying loop, which can observe the flow state of the two-phase...

Embodiment 2

[0023] During the experiment of the liquid-solid two-phase flow pipeline erosion corrosion test device involved in this embodiment, the specific process is divided into three stages: pre-experiment preparation, erosion corrosion experiment and post-experiment treatment:

[0024] Check the tightness, turn on the anti-corrosion and wear-resistant pump 7 and inject seawater into the experimental pipeline 2, verify whether the connection of the pipeline is intact, whether there is any leakage, and discharge the air to prevent cavitation of the anti-corrosion and wear-resistant pump 7 from being mixed with air to form a three-phase flow Destroy; Meanwhile, the specification that the B10 copper-nickel alloy is cut into is the cuboid of 8mm * 6mm * 5mm, offer the screw hole that screw rod 200 passes through on the cuboid, degrease with acetone, and clean up the oil stain in the screw hole, and then Polish the surface with 240#-1000# water-grinding paper, wash with absolute ethanol, dehy...

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Abstract

The invention belongs to the field of metal corrosion protection, and relates to a liquid-solid two-phase flow pipeline erosion corrosion test device which mainly structurally comprises a water tank, an experimental pipeline, a vibration platform, a test elbow and an electrochemical workstation; the movement of solid particles can be visually observed through the transparent experimental pipeline; a plurality of groove measuring points arranged on the inner wall of the detachable test elbow provide a basis for testing the erosion corrosion morphology, erosion corrosion weight loss and erosion corrosion electrochemical characteristics of different parts, and the erosion electrochemical corrosion characteristics of each measuring point are obtained through a multi-channel electrochemical workstation; and a high-speed camera is additionally arranged, so that the movement and collision process of the solid particles can be shot. The device is simple in structure, can test the erosion corrosion morphology, erosion corrosion weight loss and electrochemical corrosion characteristics of the pipeline containing the solid particles in a vibration environment, and can be suitable for the liquid-solid two-phase flow pipeline erosion corrosion test in a non-vibration environment after the vibration platform is removed from the main body structure.

Description

Technical field: [0001] The invention belongs to the field of metal corrosion protection, and relates to a liquid-solid two-phase flow pipeline erosion corrosion test device, which realizes the observation of solid particle movement in the two-phase flow pipeline and the erosion corrosion morphology test at different positions of the elbow in a vibration environment , Erosion corrosion weight loss test and electrochemical corrosion characteristic test. Background technique: [0002] The collision between the corrosive fluid containing solid particles and the surface of the material will cause erosion and corrosion of the material. Erosion corrosion is widely found in petroleum, chemical, shipbuilding, water conservancy and other industries. Equipment exposed to moving fluids will be subject to erosion and corrosion. In the multiphase flow of particles, the damage is more serious, causing damage to parts and pipelines, leading to equipment failure and pipeline leakage, which ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/56G01N5/00G01N17/02
CPCG01N3/567G01N3/565G01N5/00G01N17/02
Inventor 彭文山侯健孙佳钰李开伟苗依纯
Owner 725TH RES INST OF CHINA SHIPBUILDING INDAL CORP