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Large- and Medium-Scale Air Separation Equipment Performance Testing Methods
Generally speaking, large- and medium-scale air separation equipment is used to separate air into its components—nitrogen, oxygen, argon, and other components—and are used in a variety of industries and applications, such as the medical and drilling industries. Therefore, a thorough performance testing of such air separation equipment is necessary, so as to verify the quality and correctness of the device and to ensure its safe and efficient operation.
The purpose of the performance test is to inspect the design and operation performance of the large- and medium-scale air separation equipment such as compressor, heat exchanger, and separator, as well as to determine their suitability for operation. Therefore, the performance test should be conducted under the specified conditions, such as temperature and pressure, to ensure accuracy. The required test items vary according to the type of air separation equipment and the application.
Generally, the performance testing of large- and medium-scale air separation equipment consists of two parts: the design control test, which inspects the operating capability of the equipment and its environment; and the long-term running test, which examines the steady-state performance and reliably runs uninterruptedly. In addition, the pressure drop of the equipment should also be measured to determine if it is within the design pressure rating.
In terms of the design control test, there are four main testing items: pressure test, flow rate test, refrigeration test, and absorption test.
The pressure test is used to verify the structural strength and determine the operating pressure of the air separation equipment. The test pressure is typically set as high as 20% to 25% above the design pressure rating of the device.
The flow rate test is used to measure the operating flow rate of the air separation equipment. The test range is typically set between 50% and 120% of the design flow rate of the device.
The refrigeration test is used to examine the refrigeration function of the air separation equipment. This test takes place with the help of a flow meter and is used to measure the temperature of the inlet and outlet of the equipment.
The absorption test is used to measure the absorption ability of the equipment. The test is usually conducted by introducing a certain amount of liquid into the system and then measuring the amount of absorption.
The long-term running test refers to the inspection of the operating performance and reliability of the air separation equipment. In this test, the device is operated for a certain period of time (typically several hours) under normal operating conditions to verify its performance and determine its operating stability. During the test, the equipment should be checked for any malfunctions, such as pressure drop, leakage, and noise. The temperature, pressure, and flow rate should also be monitored to ensure their performance is correct.
In addition to the tests mentioned above, the safety performance of large- and medium-scale air separation equipment should also be tested. This includes an examination of the equipment’s auto-fighting system, such as the auto-reclosing device, the auto-isolating valve, and the fire fighting system.
By conducting thorough performance testing of large- and medium-scale air separation equipment, not only will the operation efficiency be enhanced, but also the safety of operators can be ensured. Such tests are essential to verify the correctness of the device and to guarantee its safe and efficient operation.
