[Q&A Question 043] 2017.02.12
Thread Content
This post was last edited by 955559 on 2017-7-21 at 21:54. [Q&A Question No. 043] On 2017.02.12, when the hydrogenation unit was started up, the gas pressure was normal, but ignition was not possible – what could be the reason? 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.) ) The constant-light valve and emergency cut-off valve for the heating furnace have not been reset. Petrochemical Zone—“Creative Ideas for Energy Saving” event: http://bbs.hcbbs.com/thread-1666758-1-1.html The New Normal Cup—voting for the top 10 members of HaiChuan in 2016 is now underway; vote for the member you care most about (please cast your valuable vote for those in the Petrochemical Zone). http://bbs.hcbbs.com/thread-1667649-1-1.html Summary thread of Q&A questions for 2017 (updates available now). http://bbs.hcbbs.com/thread-1657793-1-1.html Summary thread of daily questions for 2017 (updates available now). http://bbs.hcbbs.com/thread-1657794-1-1.html Summary thread of Q&A questions from 2016 (all updates completed). http://bbs.hcbbs.com/thread-1597792-1-1.html Third-phase selection of outstanding management members at HaiChuan. http://bbs.hcbbs.com/thread-1655902-1-1.html Petrochemical Zone—“Creative Ideas for Energy Saving” event: http://bbs.hcbbs.com/thread-1666758-1-1.html Xiaomi phones are up for grabs. Thread for collecting chemical industry technical materials in the “Petrochemical Section”. http://bbs.hcbbs.com/thread-1654603-1-1.html Many prizes are waiting for you (Source: HaiChuan Chemical Forum)
Large air supply volume, igniter failure, nozzle blockage, inert gases mixed in the fuel gas
How can the process be considered normal if the permanent light emergency shut-off valve does not return to its normal position?
The emergency valves for the furnace’s pilot light and main burner have not been reset
The emergency cut-off switches for the heating furnace’s permanent light and main burner have not been reset.
The gas is impure, with too little flammable component. The negative pressure in the furnace is too high, causing the newly ignited flame to go out. There may be a blockage in the pipeline from the fuel gas line in front of the burner to the manual valve.
The gas purity is low; initially, the nitrogen content is high, and the gas replacement is incomplete
The permanent light and emergency cut-off valve for the heating furnace have not been reset.
The process is normal, but the emergency pressure relief valve has not been reset – isn’t that contradictory?
Gas carries liquid; the heating furnace is under excessive negative pressure and has too high air flow