Supercritical steam oxidization test device

Abstract

The invention provides a supercritical steam oxidization test device, which is characterized by comprising a fluid control assembly; the fluid control assembly is connected to a water treatment assembly and a reaction container assembly through a pipeline respectively; the water treatment assembly is connected to the reaction container assembly through a pipeline; the fluid control assembly, the water treatment assembly and the reaction container assembly commonly form a medium circular flow loop; the reaction container assembly is arranged in a heating furnace; temperatures of the heating furnace and the reaction container assembly are controlled by a temperature control system; and the fluid control assembly and the temperature control system are monitored by a data monitoring assembly.The supercritical steam oxidization test device provided by the invention is a test device capable of simulating a high-temperature high-pressure steam environment of a (ultra) supercritical power station boiler and relates to a whole set of technical solution. The device has the advantages of being low in manufacture difficulty, high in economical efficiency, allaround in function, simple and convenient for operation, precise for control, safe and reliable and is applied to being widely popularized and used in laboratories and can satisfy requirements of scientific researches and engineeringtests.

Description

technical field [0001] The invention relates to a test device for water vapor oxidation of metal materials. The main function of the device is to simulate the high-temperature and high-pressure water vapor environment in a boiler element with super (super) critical parameters under laboratory conditions, and is used to study the oxidation of metal materials in Oxidation behavior in supercritical water vapor environment and evaluation of water vapor oxidation resistance of materials. Background technique [0002] Because supercritical water vapor is more oxidizing than air, the inner walls of superheaters, reheaters, steam pipes and other components of power plant boilers often undergo severe oxidation during operation. During the start-up and shutdown of the unit, the peeled off oxide skin will block the elbow, hinder the flow of air flow and cause the boiler to explode due to overheating. The oxide particles carried by the steam flow will enter the steam turbine, which will...

AI Technical Summary

Problems solved by technology

[0006] 1) It is difficult and expensive to manufacture high-temperature and high-pressure reaction vessels using heat-resistant steel or alloy forgings;

[0007] 2) The heating efficiency of multiple heaters in the medium is not high;

[0008] 3) The direct water cooling of the discharged high-temperature and high-pressure steam requires relatively pure deionized water to increase the cost (tap water cooling can easily lead to stress corrosion of high-pressure pipelines);

[0009] 4) If the discharged high-temperature and high-pressure steam directly enters the back-pressure valve, a special high-temperature-resistant back-pressure valve is required, which leads to high cost and reduced reliability;

[0010] 5) The discharged high-temperature and high-pressure steam preheats the feed water with low efficiency and makes the mechanism complicated;

[0011] 6) Poor operability of the device, etc.

[0012] In addition, the above-mentioned devices have not given a good solution for controlling the dissolved oxygen content of feed water

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