【Daily Question Question 230】2017.08.18
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【Daily Question No. 230】August 18, 2017: The head of a reciprocating pump is independent of its flow rate. The reference answers will be visible after () reply; points can be earned by answering the key points. (Unless otherwise specified, all questions and answers are based on hydrogenation units.) ) √Scoring criteria: 2 Wealth points for incorrect answers; *incomplete* answers earn 3–8 points. 10 Wealth points are given for correct answers accompanied by a detailed explanation, while answers that are correct but lack sufficient details earn 15–20 Wealth points. Please use these criteria for scoring. 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 nothing to do with 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 Petrochemical Sector – “Creative Ideas for Energy Savings” Campaign (Phase 2 is in full swing) http://bbs.hcbbs.com/thread-1666758-1-1.html 2017 Coal Chemicals – “My Technical Upgrades” http://bbs.hcbbs.com/thread-1786290-1-1.html
It doesn’t matter; as can be seen from the formulas for calculating the head and flow rate of a reciprocating pump, there is no relationship between head and flow rate. The head of the pump depends on the requirements of the pipeline and the capacity of the pump. When the stroke and number of strokes are constant, the flow rate of a reciprocating pump remains fixed. Of course, under higher pressure, the pressure inside the pump is greater, which leads to increased leakage from the pump; as a result, the flow rate also decreases slightly.