The cleverly designed rotameter achieves three things at once

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How to cleverly install a rotameter on the acid inlet pipeline of a bubble column tower to achieve three benefits at once: easier control, reduced consumption, and lower maintenance costs. In the hydrogen chloride unit, the concentrated sulfuric acid enters the bubble column from a high-level acid storage tank. In the past, the flow rate was determined by observing through a sight glass based on the known sulfuric acid concentration, and the valve opening was adjusted manually for control. Due to the variations in the liquid level of the acid storage tank and the constant changes in pressure inside the tank, the flow rate of sulfuric acid entering the bubble column fluctuates greatly, making it difficult to control; this results in large fluctuations in process parameters and high consumption of concentrated sulfuric acid. To ensure the smooth transportation of concentrated sulfuric acid, air must also be introduced to prevent \"air blockages\", which in turn increases the corrosion of the pipes by the sulfuric acid and raises the costs associated with equipment maintenance. To address this issue, through research and analysis, it was decided to eliminate the sight glass and instead install a rotameter cleverly on the acid inlet pipeline of the bubble column. The amount of concentrated sulfuric acid added is precisely measured using a rotameter, ensuring a steady addition and thus **saving on the use of concentrated sulfuric acid. After the renovation was completed, preliminary estimates show that 18 tons of concentrated sulfuric acid can be saved each month. It also facilitates operations for the production staff, improves the sealing during the transport of sulfuric acid, reduces corrosion of the pipelines by sulfuric acid, and lowers the costs associated with equipment maintenance.