Charcoal deposits have formed in the burner chamber of the main burner of the heating furnace
Thread Content
The burner of this heating furnace has experienced blockages of coke covering the burner chamber on three occasions, with the time intervals between such incidents getting shorter and shorter. The coke pieces turn a molten color when burned in the fire pit; after being cleaned, they appear dark black. When heated in a muffle furnace, they become grayish-white solids, which suggests that they are indeed coke pieces. So the question is: 1. What is the origin of the coke lumps? 2. With such high flame temperatures, why weren’t the coke lumps burned? 3. How are coke lumps formed? 4. Are there any solutions? My personal guess is that it’s coke powder carried in the fuel gas; due to the insufficient flow rate of the fuel gas, nucleation and crystallization occur on the metal parts of the main burner, resulting in caking. I’m not sure if this assumption is correct, so I hope fellow sailors will kindly offer their insights.
Incomplete combustion leads to carbon buildup, which can be caused by an excess of gas or too low an oxygen level. Which household’s gas stove burner never develops carbon buildup?
Carbon buildup in lumps has covered the fire pit; this is different from normal carbon formation, as in normal cases there is only a little bit of carbon black.
The original poster did not clarify what the specific fuel is, nor whether steam or compressed air is used for atomization; a preliminary analysis suggests that the atomization effect of the material is poor.
Today, I discussed this with my colleagues during the day shift: after burning, it turns into a grayish-white solid, so it can’t be toner. Could there be some inorganic salts mixed in with the fuel gas?
The fuel gas contains ethanolamine mist droplets, but in small amounts. The foreign object taken out of the fire pit was pitch black in color, with a hard and brittle porous structure; it was very similar to the coke produced by our coking unit. No significant changes were observed when it was burned with an oxy-acetylene flame, but after being heated in a laboratory muffle furnace for 4 hours, it turned into a grayish-white solid.
In general, this situation occurs mainly in refinery dry gas; when liquid is present and atomization is poor, coking is likely to take place
Incomplete combustion leads to carbon deposition; it is possible to have the fuel gas sampled for analysis. If the proportion of components in the fuel gas with a molecular weight of 3 or more, such as propane, exceeds 5%, coking becomes inevitable.
I think it might be related to the composition of the fuel gas, as well as the processing methods; for example, fuel gas that has been desulfurized tends to coking much less