High-temperature steam oxidation test device

Abstract

The present invention relates to a high-temperature steam oxidation experimental device, and comprises a processing subsystem which can remove oxygen in water, an oxidative experiment subsystem and awater recovering subsystem. The processing subsystem which can remove oxygen in water comprises a water processing bucket which is connected with a vacuum pump. The lower end of the water processing bucket is provided with an oxygen removing tube which is connected with an inert gas bottle. The upper part and the lower part of the water processing bucket are all connected with the upper part and the lower part of the water storage bucket of the oxidative experiment subsystem. The lower part of the water storage bucket is connected with the steam generating preheating furnace of the water recovering subsystem via a pipeline and a valve. A metering pump is arranged on the pipeline. The steam generating preheating furnace is also connected with a reacting furnace which is provided with a steamoutlet. The processing subsystem which can remove oxygen in water of the present invention can adjust the content of dissolved oxygen in the experiment water. The other quality parameter of the exper iment water can be adjusted through controlling the water quality. The flowing amount of the steam can be adjusted via the metering pump of the oxidative experiment subsystem. The steam temperature ofthe oxidative experiment can be adjusted by changing the setting temperature of the steam generating preheating furnace and the reacting furnace.

Description

technical field [0001] The invention relates to an oxidation test device, in particular to a high-temperature steam oxidation test device that can simulate the service state of a steam circulation component of a thermal power plant. Background technique [0002] In the field of thermal power generation, as people pay more and more attention to saving energy and protecting the environment, the parameters of units are continuously improved, and the problems of steam side oxidation of steam circulation components such as superheaters, reheaters, high-temperature steam pipes, steam turbine rotors, blades, nozzles, etc. It is also becoming more and more prominent, which seriously affects the safe operation of the unit. Therefore, it is urgent to understand the oxidation law of the heating surface material under high temperature steam. It is necessary to establish a high temperature steam oxidation test device and method to simulate the service of the steam side of the heating surf...

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Problems solved by technology

Some researchers use autoclaves to conduct experiments, but although autoclaves can simulate high temperature and high pressure, the temperature is generally limited to below 500°C, which is lower than the operating temperature of many units at present, and the steam state can only be a static atmosphere, while the heating of power plants The steam in the surface tube is flowing at high speed, and the oxidation of steam in a static atmosphere may affect the oxidation mechanism. At the same time, the steam quality such as the oxygen content of the water vapor in the autoclave cannot be controlled, so the autoclave test has great disadvantages

Some researchers use simple equipment. Although the steam can flow on the surface of the sample, they cannot deoxygenate the test water and the system, let alone simulate the influence of the dissolved oxygen content in the test water on the oxidation law.

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