【Q&A Question 152】2017.06.01
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This post was last edited by 955559 on 2017-7-21 23:15. [Q&A Question 152] 2017.06.01: Why must the compressor be stopped if the cooling water supply is interrupted? The reference answer can be seen after *replying*; points will be awarded for identifying the key points. (Unless otherwise specified, all questions and answers are based on hydrogenation units.) ) When the cooling water supply is interrupted, a large amount of heat generated by the compressor cannot be dissipated, causing the gas temperature to rise. This not only requires work to perform adiabatic compression but can also lead to serious accidents. For example, as the cylinder and piston temperatures increase, it becomes easier for them to get stuck together. Excessively high temperatures can cause metal decarburization and the formation of hydrocarbons from hydrogen in the gas, thereby altering the properties of the cylinder material. Additionally, high temperatures reduce the mechanical strength of the equipment as well as its pressure-bearing capacity. If cooling water is suddenly restored to flow while the equipment’s materials are still at high temperatures, sudden condensation may occur, leading to explosions and damage to the equipment. Therefore, an interruption in cooling water supply must be treated as an emergency shutdown situation. Scoring criteria: 2 points for incorrect answers; 3–8 points for partially correct answers; 10 points for correct answers accompanied by detailed explanations; 15–20 points for correct answers with additional supplementary information. Please score according to these criteria. Note: If there are editing records after answering, only those who participated will be credited points. For continuous malicious spamming, 2 points will be deducted each time, with no upper limit. Pure numbers, pure emojis, or random letters unrelated to the answer are all considered malicious spamming; points will start to be deducted after three warnings. 2017 Q&A Summary Thread (updates have begun) http://bbs.hcbbs.com/thread-1657793-1-1.html 2017 Daily Question Summary Thread (updates have begun) http://bbs.hcbbs.com/thread-1657794-1-1.html 2016 Q&A Summary Thread (updates completed) http://bbs.hcbbs.com/thread-1597792-1-1.html
Prevent equipment damage caused by excessive temperatures
A loss of cooling water to the compressor causes the cooler to lose its cooling function, affecting the compressor’s exhaust volume. Furthermore, when the oil cooler loses water supply, the temperature of the lubricating oil rises, its viscosity decreases, its lubricating properties decline, wear on moving parts increases, which reduces the machine’s lifespan and increases power consumption, leading to a series of accidents; therefore, the compressor must be stopped immediately once there is a loss of water supply.
A loss of cooling water for the compressor causes the cooler to lose its cooling function, resulting in an increase in cylinder temperature. This can lead to sticking between the cylinder and the piston. Excessively high temperatures can cause metal decarburization and reactions with hydrogen, thereby deteriorating the quality of the cylinder material. Additionally, when the oil cooler loses water, the temperature of the lubricating oil rises, its viscosity decreases, and its lubricating properties are impaired. This accelerates wear on moving parts, reducing the machine’s lifespan and increasing power consumption
Effects of circulating water interruption: 1. If the cooling water for the lubricating oil cooler is interrupted, the circulating hydrogen compressor must be stopped, as the temperature of the lubricating oil rises, and it will continue to increase in the absence of cooling. 2. The same is true for the new hydrogen compressor and the high-pressure feed pump. Moreover, the motors of the new hydrogen compressor and the high-pressure feed pump, as well as the cooling water, will all be forced to stop once the circulation water is interrupted. Handling: 1. Upon receiving the notification, immediately pour fire-fighting water or fresh water onto the lubricating oil cooler of the cyclohydrogen compressor to ensure its proper operation. This will provide ample time for dealing with the accident, and it will also make it possible to restart the compressor easily once the circulating water is restored. 2. If the reaction could be faster, it would be even better to be able to water the lubricating oil cooler of the reaction feed pump as well, to keep it running. If any device stops during the processing, the corresponding solution for shutting down that device shall be applied.
A disruption in the cooling water supply causes the temperature of the compressor’s lubricating oil and the exhaust temperature to rise, as well as the temperatures of the bearings and bearing shells. Therefore, the compressor must be stopped when there is a disruption in the cooling water supply
Answer: A loss of cooling water for the compressor causes the cooler to lose its cooling function, affecting the compressor’s exhaust volume. Furthermore, when the oil cooler loses water supply, the temperature of the lubricating oil rises, its viscosity decreases, its lubricating properties decline, wear on moving parts increases, which reduces the machine’s lifespan and increases power consumption, leading to a series of accidents; therefore, the compressor must be stopped immediately once there is a loss of water supply.
1. A disruption in the cooling water flow will cause the temperature of the lubricating oil in the lubricating oil cooler to rise, and it will continue to increase without cooling. It causes the lubricating oil to lose its lubricating and cooling functions. 2. The interruption of cooling water leads to excessively high motor temperatures, resulting in motor damage.
A disruption in the cooling water flow prevents the large amount of heat generated by the compressor from being dissipated, increasing mechanical strain and posing a risk
A loss of cooling water to the compressor causes the cooler to lose its cooling function, affecting the compressor’s exhaust volume. Furthermore, when the oil cooler loses water supply, the temperature of the lubricating oil rises, its viscosity decreases, its lubricating properties decline, wear on moving parts increases, which reduces the machine’s lifespan and increases power consumption, leading to a series of accidents; therefore, the compressor must be stopped immediately once there is a loss of water supply.