A large-scale steam test system and method based on auxiliary steam system of thermal power plant

Abstract

A large-scale steam test system and method based on the auxiliary steam system of a thermal power plant, the system includes a first steam source connected to the auxiliary steam header pipeline, a second steam source connected to the startup boiler pipeline, and the first steam source and the second steam source The main steam source where the steam source pipes merge together, the spray water source connected to the start-up boiler water tank, the spray container that connects the main steam source pipe and the spray water pipe, the steam main upstream that connects the spray container and the test piece, The steam bypass pipe connecting the spray container and the start-up boiler to the empty steam exhaust pipe, the downstream of the steam main pipe connecting the test piece and the start-up boiler to the empty steam exhaust pipe, and the super bypass pipe connecting the upstream of the steam main pipe and the empty steam exhaust pipe The pressure protection pressure relief pipe is located at the lowest level of the test piping system and is a drain pipe composed of traps and pipes; the present invention also provides a test method; the present invention uses the auxiliary steam system of the existing thermal power plant to provide large-scale thermal-hydraulic tests. High pressure and large flow can adjust the test steam.

Description

technical field [0001] The invention relates to the field of large-scale steam-water two-phase flow thermal hydraulic test research, in particular to a large-scale steam test system and method based on an auxiliary steam system of a thermal power plant. Background technique [0002] With the development of equipment conditions and science and technology, in the field of engineering test research, more and more tests need to use steam with higher parameters as the test working fluid. In order to provide the required steam working medium, an electric heating steam generator is generally used in laboratory conditions to provide a steam source at a lower flow rate and lower pressure. In order to complete the steam working medium conditions with higher parameters, electric heating boilers are generally specially set up, and the construction, use, and maintenance costs are high, and the steam conditions of a certain pressure and superheat are often not reached. Therefore, in the ...

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Problems solved by technology

[0004] Chinese patent CN100501230C is used to simulate the steam generation method and equipment in the laboratory, and provides a steam generation method and equipment. The principle is to heat the water in the container, convert a part of the water into steam, and discharge the container as test steam; This method and equipment use electric heating, which can only produce low-flow, low-pressure saturated steam, which cannot meet the steam requirements of large-scale steam tests.

Chinese patent CN103543096A is a dynamic high-temperature and high-pressure oxidation experimental device, which provides a device for performing high-temperature and high-pressure steam oxidation dynamic tests on materials, which can reach an environment of 800 ° C and 40 MPa. The high-pressure reactor is connected to heat the ultra-pure water pressurized by the high-pressure pump into superheated steam; this method and equipment can only generate low-flow high-pressure superheated steam by using an electric heating source, which cannot meet the steam requirements of large-scale steam tests

Chinese patent CN103759237A is a medium-temperature solar steam system, which provides a system for generating medium-temperature steam by using solar energy. Solar heating cannot achieve a stable, higher flow, higher pressure steam source

Chinese patent CN103810930A secondary side passive waste heat removal system thermal-hydraulic characteristics experimental simulation device provides a device that uses electric heating to generate primary side steam into the cooler and secondary side water for heat exchange and cooling; this experimental method provides The steam is low-flow, low-pressure saturated steam, which cannot truly simulate the high-pressure saturated steam generated by the steam generator

Chinese patent CN203782482 is a steam spray system, which provides a system device for mixed spraying of steam and water. The principle is to mix steam and cold water in the steam storage cylinder and then discharge them to the surface of the material for humidification and cooling; Spray system, no measurement of steam enthalpy, and can only be used for low pressure, small flow and occasions where mixing uniformity is not required

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