Material issues of the cooling tubes in chlorine-drying bubble columns
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In chlorine-drying bubble columns, Hastelloy cooling tubes are used to dissipate the heat generated by the absorption of water by sulfuric acid. However, in actual operation, these cooling tubes can become corroded and damaged (the last time it happened after about 4 years of use), allowing cooling water to enter the system and causing incalculable losses. I would like to ask: are there any better materials that can prevent corrosion of the cooling tubes in bubble columns?
Without using cooling water, how much can the temperature rise be? It absorbs very little water in this part.
This must be equipped with cooling water; otherwise, the accumulation of heat can cause problems such as tank cracking and leakage, leading to the shutdown of the system
Using the same process, Japan is able to reduce the water content in liquid chlorine to 1 ppm; this must be achieved through careful attention to details. Therefore, I would like to know what aspects can be optimized
Hastelloy is widely used in the sulfuric acid drying process. I have a few suggestions regarding this issue, for reference only. 1. From the perspective of safe production, cooling with 5-degree water coil is not as effective as cooling using an external plate heat exchanger ； 2. Improve the quality of Hastelloy procurement ； 3. Reduce the inlet pressure of the cooling water used in the plate heat exchanger, increase the pressure of the circulating acid, and install an online pH meter at the outlet of the cold water from the plate heat exchanger to monitor the pH value of the cooling water in real time.