【Daily Question No. 020】2017.01.20

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This post was last edited by 955559 on 2017-7-31 at 15:42. [Daily Question No. 020] On 2017.01.20, the fresh hydrogen is pressurized using a fresh hydrogen compressor and then sent to the outlet of the circulating hydrogen pump in order to control the pressure of （ ）。 The reference answers 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.) ) Summary thread of Q&A posts on high-pressure systems or reaction systems for 2017 (updates in progress): http://bbs.hcbbs.com/thread-1657793-1-1.html Summary thread of daily questions for 2017 (updates in progress): http://bbs.hcbbs.com/thread-1657794-1-1.html Summary thread of Q&A posts for 2016 (already updated): http://bbs.hcbbs.com/thread-1597792-1-1.html New Normal Cup – 2016 HaiChuan Top 10 Selection – Please recommend candidates: http://bbs.hcbbs.com/thread-1654112-1-1.html Third-phase evaluation for outstanding management members at HaiChuan: http://bbs.hcbbs.com/thread-1655902-1-1.html “Creative Ideas for Energy Saving” event in the petrochemical sector: http://bbs.hcbbs.com/thread-1666758-1-1.html Xiaomi phones available for grabs; thread for collecting chemical industry technical materials in the “Petrochemical Section”: http://bbs.hcbbs.com/thread-1654603-1-1.html Many prizes waiting to be claimed (Source: HaiChuan Chemical Forum)