【Daily Question No. 323】November 25, 2018
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【Daily Question No. 323】November 25, 2018: How to determine whether a pressure relief valve operating at 0.7 MPa/min or 2.1 MPa/min has activated? 1. The indicator light for the valve operating at 0.7 MPa/min or 2.1 MPa/min turns on, and an obvious venting sound can be heard outside； 2. The pressure of the reaction system is reduced at a rate of 0.7 MPa/min or 2.1 MPa/min. (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
Sounds can be heard at the site; the noise is very loud when emergency pressure relief is activated, or one may be sent to check the pressure relief valve. For internal operations, it can be determined by monitoring the system pressure and the decrease in reactor temperature
1. The indicator light for valve operation at 0.7 MPa/ or 2.1 MPa/min lights up, and an obvious venting sound can be heard outside； 2. The pressure of the reaction system is reduced at a rate of 0.7 MPa/min or 2.1 MPa/min.
For external operations, listen to the sounds; for internal operations, check the system pressure
The operator on site checks the valve stem and listens for sounds, while the operator in the control room monitors changes in system pressure
1. The indicator light for valve operation at 0.7 MPa/ or 2.1 MPa/min lights up, and an obvious venting sound can be heard outside； 2. The pressure of the reaction system is reduced at a rate of 0.7 MPa/min or 2.1 MPa/min.
The indicator light for valve operation at 0.7 MPa/ or 2.1 MPa/min lights up, and an obvious venting sound can be heard outside
1. The indoor indicator light is on, and an obvious venting sound can be heard outdoors； 2. The pressure of the reaction system drops.
The light is on, and an obvious venting sound can be heard outside； 2. The pressure of the reaction system is reduced at a rate of 0.7 MPa/min or 2.1 MPa/min.
1. The indicator light for valve operation at 0.7 MPa/ or 2.1 MPa/min lights up, and an obvious venting sound can be heard outside； 2. The pressure of the reaction system is reduced at a rate of 0.7 MPa/min or 2.1 MPa/min.