Test device and test method for testing delivery capacity of steam security valve

Abstract

The invention relates to a test device and a test method for delivery capacity of a steam security valve based on system dryness control. The test device is mainly composed of a concurrent boiler, a steam separator, an energy storage and a test vessel through connecting in sequence. The test method for the delivery capacity of the steam security valve includes: regulating the opening degree of a regulating valve on a steam header to stabilize the steam pressure at a boiler outlet to avoid the unbalance between the steam supply amount of the boiler and the pressurization desired steam amount of the energy storage when testing different sizes of security valves; regulating the opening degree of a regulating valve between the energy storage and the test vessel to realize the stable discharge of the measured steam security valve; when testing the delivery capacity of the security valve, enabling the boiler to continuously supply gas for the energy storage system under pressure control so as to maintain enough pressure for the energy storage in testing, and accordingly the energy storage volume is reduced, and the device constructing cost is lowered; regulating the load of the concurrent boiler to change the overheat degree of the steam at the boiler outlet so as to meet the steam quality requirement in testing the delivery capacity. The test device and the test method have advantages of strong operating flexibility, stable system running and high testing precision.

Description

technical field [0001] The invention relates to a test device and a test method for testing the discharge capacity of a steam safety valve, in particular to a test device and method for the discharge capacity of a steam safety valve based on system dryness control. Background technique [0002] As an important product of valves and safety accessories of nuclear power, thermal power and chemical pressure equipment and pipelines, steam safety valves play a decisive role in the safe operation of nuclear power, thermal power and chemical enterprises, and are the last passive safety of pressure equipment. measure. If a steam safety valve fails, it can often have catastrophic consequences. For example, the safety valve of the pressurizer is one of the most important valves in the primary circuit part of the nuclear power plant, and it is the key equipment to ensure the safety of the reactor coolant system and its connected pipelines and equipment. Focus issues in chemical indust...

AI Technical Summary

Problems solved by technology

By adjusting the opening of the regulating valve on the steam header, this technical measure stabilizes the steam pressure at the boiler outlet to solve the imbalance between the boiler steam supply and the steam demanded by the accumulator during the test of safety valves of different specifications; by adjusting The opening of the valve between the accumulator and the test container is adjusted to realize the stable discharge of the steam safety valve under test; during the discharge test of the safety valve, the boiler continuously supplies gas to the energy storage system under pressure control, so that the accumulator Maintain sufficient pressure during the test to reduce the volume of the accumulator and reduce the construction cost of the device; adjust the load of the once-through boiler to change the superheat of the boiler outlet steam to meet the steam quality requirements of steam safety valves of different specifications

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