[Q&A Question 253] 2018.09.16
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【Q&A Question 253】September 16, 2018: Why must a reciprocating compressor be shut down when the cooling water supply is interrupted? When the cooling water supply is interrupted, a large amount of heat cannot be removed during compression, causing the gas temperature to rise. This in turn raises the temperatures of the cylinder and piston, reduces the viscosity of the lubricating oil, and undermines its lubricating properties, leading to wear and sticking between the piston and the cylinder. Even if the temperature is too high, exceeding the flash point of the lubricant, there is a risk of explosion. Therefore, when stopping the cooling water, the machine must be shut down. (Unless otherwise specified, all questions and answers are based on hydrogenation units.) ) Correct: 3 wealth, Incorrect: 1 wealth ； Mass posting of posts – rated based on the lowest score ； Replies that are unrelated to the answer are considered spam and will be deleted immediately. For management purposes, if you need to view content from a few days ago, please go to https://bbs.hcbbs.com/home.php?mod=space&uid=3862647&do=thread&view=me&from=space through the summary post below
1. The motor of the compressor requires cooling water to prevent overheating; otherwise, the motor will shut down. 2. When compressing gas inside the compressor’s cylinder, a large amount of heat is generated. If the cooling water supply is interrupted, this heat cannot be removed, leading to overheating of the cylinder, which may result in damage to the cylinder or its seals. 3 A disruption in the cooling water supply prevents the inter-stage coolers from performing their cooling function, resulting in the compressed gas overheating and damaging the compressor. In summary, the compressor stops when the cooling water supply to it is interrupted.
When the cooling water supply is interrupted, a large amount of heat cannot be removed during compression, causing the gas temperature to rise. This in turn raises the temperatures of the cylinder and piston, reduces the viscosity of the lubricating oil, and compromises its lubricating properties, leading to wear and sticking between the piston and the cylinder. If the temperature is too high, exceeding the flash point of the lubricant, there is also a risk of explosion. Therefore, when stopping the cooling water, the machine must be shut down.
After the cooling water supply is interrupted, the heat generated during gas compression cannot be dissipated, causing the temperature of the cylinder, packing, and other components to rise sharply. At the same time, rising temperatures reduce the strength of the equipment and also cause changes in the metal composition, thereby decreasing its pressure-bearing capacity. Or, if cooling water is suddenly restored to the equipment when it is at high temperature, rapid cooling of the equipment may lead to explosion, damaging the equipment and causing accidents.
The heat generated by the compression of gas in the cylinder, as well as the heat resulting from friction due to the back-and-forth movement of the piston, cannot be dissipated in time, causing the temperature to rise sharply. 1. When the temperature exceeds the limit allowed by the material, its functional properties are compromised； 2. Above a certain temperature, the lubricating oil cokes, which increases friction and can even lead to the detonation of the light components produced by the decomposition of the lubricating oil.
After the cooling water supply is interrupted, the heat generated during gas compression cannot be dissipated, causing the temperature of the cylinder, packing, and other components to rise sharply. At the same time, rising temperatures reduce the strength of the equipment and also cause changes in the metal composition, thereby decreasing its pressure-bearing capacity. Or, if cooling water is suddenly restored to the equipment when it is at high temperature, rapid cooling of the equipment may lead to explosion, damaging the equipment and causing accidents.
When the cooling water supply is interrupted, the heat generated during gas compression cannot be dissipated, causing the temperature of the cylinders, gaskets, and other components to rise sharply. At the same time, this increase in temperature reduces the strength of the equipment, as well as altering the composition of the metals, thereby decreasing the equipment’s capacity to withstand pressure. If the equipment suddenly resumes water supply at high temperatures, rapid cooling of the equipment may cause it to explode, resulting in equipment damage and accidents.
Since the cooling water is used to cool the cylinder jacket and the compressed gas, a disruption in the supply of cooling water can cause the cylinder to overheat, which in severe cases may lead to an explosion of the cylinder
Excessive temperature in the machine can damage valve plates, support rings, piston rings, etc.; in severe cases, it can lead to damage to the equipment
When the cooling water supply is interrupted, a large amount of heat cannot be removed during compression, causing the gas temperature to rise. This in turn raises the temperatures of the cylinder and piston, reduces the viscosity of the lubricating oil, and undermines its lubricating properties, leading to wear and sticking between the piston and the cylinder. Even if the temperature is too high, exceeding the flash point of the lubricant, there is a risk of explosion. Therefore, when stopping the cooling water, the machine must be shut down.
When the cooling water supply is interrupted, a large amount of heat cannot be removed during compression, causing the gas temperature to rise. This in turn raises the temperatures of the cylinder and piston, reduces the viscosity of the lubricating oil, and undermines its lubricating properties, leading to wear and sticking between the piston and the cylinder.