Dear sea friends, after removing the slurry separator behind the generator, has the inner wall turned completely black in any cases?
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Dear sea friends, after removing the slurry separator behind the generator, has the inner wall turned completely black in any cases?
Although it’s not related to the PVC industry, I’d like to talk about my experience using carbide lamps when I was a child – the inner walls of those lamps made of stainless steel did indeed turn black.
The inner wall of the calcium carbide lamp made of stainless steel is blackened; it’s probably caused by acetylene. There should be no burning occurring inside our equipment. Are there any other possibilities that could cause the inner wall to turn black?
When we opened our slurry separator, the scale inside was gray in color; there was no black scale present. You can take the scale to quality control for analysis of its components
The high temperature generated at the moment of reaction between calcium carbide and water causes acetylene gas to carbonize, resulting in black carbon powder. When using wet acetylene, it is necessary to consider whether the addition of fine calcium carbide dust is uniform during the feeding process; concentrated feeding may lead to local high temperatures that trigger carbonization
Black residues or powders such as toner can be seen when the generator discharges waste, but they are not observed in the slurry separator; after all, it is difficult for acetylene gas to carry toner into the slurry separator, and the continuous addition of water in the separator helps to wash away the black powder on its walls.
The calcium carbide reaction should take place inside the generator; it’s impossible for calcium carbide to react with water in the slurry separator. However, it’s possible that calcium carbide dust has entered the slurry separator.
The reaction takes place inside the generator, and the fine carbon powder generated at the moment of the reaction is carried away by acetylene gas
Firstly, the reaction of calcium carbide undoubtedly takes place in the generator; however, since the reaction between calcium carbide and water is not complete, there is a high likelihood that unreacted calcium carbide exists in the slurry separator. The carbonization temperature of acetylene gas is insufficient. The black deposits are mainly attributed to the calcium carbide itself. Personal opinions are for reference only.