[Q&A Question 193] 2018.07.18
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【Q&A Question 193】July 18, 2018: Briefly explain why steam is blown into the furnace before igniting it. The functions of blowing steam are: (1) to displace any combustible gases in the furnace and prevent explosions during ignition, and (2) to raise the temperature of the furnace, thereby creating a vacuum effect. (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. The APP short-video skill competition has begun! https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1951670
Remove any unburned combustibles or flammable gases that may be accumulated in the furnace chamber, flue, and other areas, to prevent deflagration during ignition.
Blow out any combustible gases that may remain in the furnace to prevent flash explosions during ignition
Prevent the accumulation of combustible gases in the furnace due to reasons such as internal valve leaks, and promptly displace them with steam to avoid flash explosions.
Drive away the combustible gases in the furnace to prevent detonation during ignition
Steam is used to displace the flammable gases in the furnace, which also serves to dilute them and prevent explosions; this method is more effective than using air for such purposes.
Gas replacement is carried out in the furnace to prevent the accumulation of flammable gases from causing an explosion during ignition
To prevent residual flammable gases before ignition, if the concentration is above the explosive limit, dangers such as deflagration or explosion may occur
Blow out the combustible gases in the furnace to prevent a flash explosion at the moment of ignition
The purpose of purging is to prevent the presence of combustible gases before ignition; if their concentration exceeds the explosive limit, dangers such as deflagration or explosion can occur.