What causes the torch condensate to be black?
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The acidic gas from the top of the shift stripper is sent to the flare, where it mixes with the exhaust gases containing ethylene glycol; the condensate resulting from this mixture is black. What reaction is taking place here? Could someone provide some insights?
Does it smell bad? We have a pipeline for discharging ethylene glycol waste, which, when it comes into contact with oxygen-containing materials in the pipeline, reacts to form aldehydes and acids. It smells really bad.
This post was last edited by ylb913 on 2016-7-5 20:03. Media containing coke dust and coal dust, due to sedimentation and adhesion, – when opened after a shutdown, isn’t everything black? Carrying, even in trace amounts, is not sustainable over time, especially given its tendency to precipitate, adhere, obstruct, and accumulate on surfaces.
It can’t be filtered out; it probably isn’t a solid
It has a taste, but it’s not very strong. What substance is responsible for it turning black?
This post was last edited by ylb913 on 2016-7-5 20:36. PM-grade particles that float in gases – who can filter them out? Refineries also have coking units; not every refinery experiences blockages, but in our plant, there are many blockages in the pipelines related to coking. These issues have not affected the overall production of the plant, thanks to various workarounds that have been employed.
What I saw was yellow-brown, acidic corrosion rust; there was everything inside the torch
There is also... but why doesn’t it corrode before the ethylene glycol is vented, and does it corrode after that?
Duo Lai Dong understands well – I’ve collected liquid droplets from our torch several times, and they’re all quite pure
It is likely that alcohols possess reducing properties, which reduce the corroded iron. The solution contains ferrous iron and ferric iron; when their proportions are appropriate, the colors of ferrous iron and ferric iron combine to form black. If an oxidizing agent is added to the solution and heated under acidic conditions, it becomes transparent with a yellow color.