Internal pressure creep test device for simulating service environment of boiler tubes in coal-fired power plant, and using method of internal pressure creep test device

Abstract

The invention discloses an internal pressure creep test device for simulating the service environment of boiler tubes in a coal-fired power plant, and a using method of the internal pressure creep test device. The device comprises a gas pressurization system, a steam supply system, a flue gas supply system, a test heating system and a control cabinet. Compared with the prior art, the device and the method can realize an internal pressure creep test of the boiler tubes of the coal-fired power plant under various environment coupling actions such as high temperature, high pressure, outer wall corrosive flue gas and inner wall water vapor, so that the test environment is closer to the actual service environment of the boiler tubes of a coal-fired power stations, and the test results are moreaccurate and reliable. Furthermore, the temperature (0-1000 DEG C), pressure (0-200MPa), flue gas ratio and vapor dissolved oxygen content of the device can be adjusted, so that the device can meet the requirements of different test conditions; finally, according to the device, a plurality of sets of test heating units can be connected in parallel at the same time, so that a plurality of samples can be subjected to the internal pressure creep test at the same time.

Description

technical field [0001] The invention belongs to the technical field of high-temperature creep test research on metal materials, and in particular relates to an internal pressure creep test device and method for simulating the service environment of boiler tubes in coal-fired power plants. Background technique [0002] The high temperature creep test is a kind of material mechanical performance test to measure the slow plastic deformation of the material under the action of constant temperature and constant stress for a long time. The high temperature creep test can be used to study the fracture law, mechanism and influencing factors of materials under the action of external load or the coupling action of load and environmental factors (temperature, pressure and medium, etc.), which is a high temperature component (such as coal-fired boiler tube) It provides an important basis for the selection and design of high-temperature components, especially during the service period of...

AI Technical Summary

Problems solved by technology

Therefore, the current test equipment can only carry out the high temperature internal pressure creep test in the air (the internal pressurized gas is all inert gas) and cannot truly reflect the high temperature creep performance of the boiler tube of the coal-fired power plant under the actual working condition. The results are often biased

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