Problems with hydrochloric acid synthesis furnaces
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We have two hydrochloric acid and synthesis furnaces with a production capacity of 70,000 tons each, which have just been put into operation. After production begins, water can occasionally be seen flowing down from the viewports at the bottom of the furnaces. Initially, it was suspected that the gaskets between the cooling water side and the furnace interior were damaged; these gaskets were then removed and replaced with EPDM-coated PTFE strips. Yet even after that, water was still observed flowing down from the viewports, in intermittent bursts rather than continuously. We’re not sure what the cause is. The manufacturer says it’s condensed acid or water brought in by hydrogen – is that correct? Also, when the new furnace is put into operation, what determines the increase in load? Can’t it be increased too quickly? The new furnace shows graphite flakes on the bottom of it; I’m not sure what the reason is
High water content in hydrogen may be an issue; one can try using a hydrogen dryer to dehydrate the hydrogen before carrying out acid treatment
This post was last edited by aldd7611 on 2019-9-15 at 10:47. Acid can be seen inside the viewfinder; it is recommended to shut down the furnace for inspection. It’s possible that the gasket of the observation hole has leaked as well.
Hello, which type of synthesis furnace are you using? The graphite blocks falling out is clearly a quality issue, as is the problem with the yield.
The falling of graphite pieces inside the furnace should be considered an abnormal phenomenon. When condensed acid is seen flowing downward inside the furnace, it should be treated differently; a small amount that flows evenly can be considered normal. The source of condensed acid is primarily the high oxygen content in chlorine; during the reaction, oxygen reacts preferentially with hydrogen to form water, which then cools against the furnace walls and results in the formation of condensed acid. If a large amount of condensed acid flows downward, either in streams or unevenly around the furnace walls, it is possible that there is a leak in the cooling water.
If there is no leakage in the cooling water, then it’s because the moisture content of the raw material is too high, resulting in excessive condensation acid. The breakdown of the graphite blocks is likely due to an overly rapid increase in temperature, which caused uneven heating and subsequent fragmentation