【Q&A Question 176】2017.06.25
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This post was last edited by 955559 on 2017-7-21 23:06. [Q&A Question 176] June 25, 2017: Why is a cooler needed at the outlet of the first stage of the compressor? 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.) ) Note: For questions of the type \"one question per day,\" if a person replies continuously for a month, that is, posts more than 30 times, their score will be assigned as 2 points, which is the lowest possible score. Click once to reply; if multiple replies are made, points will be awarded as appropriate, as deleting posts is also a waste of time. Cool the compressed gas to prevent the temperature of the gas undergoing further compression from rising too high. Scoring criteria: An incorrect answer earns 2 wealth points; an *incomplete* answer yields 3–8 points. A correct answer with a detailed explanation earns 10 wealth points, while a correct answer with insufficient additional details grants 15–20 wealth points. Please score according to these criteria. Note: If there are editing records after answering, only points will be awarded to those who participated. For continuous malicious spamming, 2 points will be deducted each time, with no upper limit. Pure numbers, pure emojis, or random letters that have no relation 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
When gas is compressed, its temperature rises; if no water cooler is used, this can result in an excessive temperature at the secondary inlet. Additionally, high temperatures can cause the lubricating oil to deteriorate, affecting the operation of the unit.
In addition to cooling the gas in the first-stage cylinder, it can also separate the moisture and lubricating oil from the hot air.
For gases, lower temperatures make them easier to compress; outlet cooling is used to reduce the load on the compressor and lower energy consumption.
Prevents the compressor’s exhaust temperature from rising too high, while condensing the liquid to stop it from entering the compressor.
Reduce the temperature of the first-stage exhaust gas to prevent excessive temperature at the inlet of the second stage
To reduce the temperature of the incoming fluid at the next stage, and to separate the mechanical water generated during the compression and condensation process. So, an additional water cooler is added at the primary outlet
Cool the compressed gas to prevent the temperature of the gas undergoing further compression from rising too high.
Prevent the temperature at the secondary entrance from becoming too high
Multi-stage reciprocating compressors usually require inter-stage coolers. Even when compressing hydrogen, which has the lowest molecular weight, the gas temperature at the outlet of the cylinder can exceed 100 degrees Celsius; without inter-stage cooling, it is impossible for the gas to proceed to the next cylinder for compression, as the materials cannot withstand such temperatures. Most units are equipped with a safety system that triggers an shutdown once the temperature exceeds a set value, which is typically around 150 degrees Celsius. A liquid separation device is usually installed after the cooler, and this separation process takes place in a liquid separation tank at the inlet of the cylinder. Compressors used for processing heavy-duty process gases generally have low outlet pressures, and the use of inter-stage coolers is primarily aimed at improving the efficiency of the unit and reducing the requirements regarding the quality of the materials used