【Q&A Question 338】2017.12.22
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This post was last edited by liuquan1100 on 2017-12-24 at 18:00. [Q&A Question 338] What are the reasons for high exhaust pressure in the first stage of a reciprocating compressor on 2017.12.22? (1) Backflow in the second-stage suction valve, (2) Backflow in the second-stage exhaust valve, (3) High inlet pressure, (4) Blockage in the pipeline from the first stage to the second stage. (Unless otherwise specified, all questions and answers are based on hydrogenation units.) ) For management purposes, if you need to view content from a few days ago, please go through the summary post below. 2017 Q&A Summary Thread (updates have begun) https://bbs.hcbbs.com/thread-1657793-1-1.html 2017 Daily Question Summary Thread (updates have begun) https://bbs.hcbbs.com/thread-1657794-1-1.html 2017 Daily Image Summary Thread https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1875160 2017 LNG Version Daily Question Catalog https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1804162 2016 Q&A Summary Thread (updates completed) https://bbs.hcbbs.com/thread-1597792-1-1.html
Low inlet pressure, exhaust valve failure, poor cooling effect of the inter-stage coolers, inadequate cooling water for the cylinders, high ambient temperature, high back pressure, thermocouple failure!
High inlet pressure; the secondary operation is not proper
1. High pressure at the primary inlet. 2. Leakage in the secondary intake and exhaust valves. 3. Poor cooling efficiency of the cooler after the primary stage. 4. Faulty primary intake valve. 5. High temperature at the primary inlet
High inlet pressure； There is a problem with the secondary air valve
Cause analysis: 1] The primary exhaust valve is not tight enough. 2] The pressure of the intake air at the primary stage is too high. 3] The outlet pipes for stages 1 and 2 are blocked. 4] Check the exhaust temperature; the water cooling is inadequate
1. There is a blockage between the primary outlet and the secondary inlet. 2. The secondary stage does not perform well; the gas discharged from the primary stage cannot be fully drawn in by the secondary stage to be sent to the next stage. 3. The cooling effect of the cooler at the primary outlet is poor.
1. The pressure of the primary inlet air increases. 2. If the backflow path is blocked, and there is multi-stage compression, it is possible that there is a problem with the secondary air valve. 3. There is a problem with the unloader.
1. Backflow in the secondary intake valve; 2. Backflow in the secondary exhaust valve; 3. High intake pressure; 4. Blockage in the pipeline from stage 1 to stage 2
High pressure at the primary inlet, internal leakage in the secondary intake valve, damaged outer gasket of the secondary intake valve