Sulfur flow rate for acid production from liquid sulfur
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Dear experts, based on your experience, in the process of producing sulfuric acid using liquid sulfur, what method is used to control the flow rate of sulfur before it enters the combustion furnace? The factory where I work is over 30 years old, and currently a Lewis angle valve is installed in front of the burner for manual fine-tuning. Do any of you have experience using control valves for automatic adjustment? (Have you used air volume control to regulate the amount of sulfur fed in?) If so, what type of valve is recommended? Thank you
Is it a friend from Taiwan? It is convenient to control the flow rate of liquid sulfur pumps using a frequency regulator. If automatic adjustment is required, a control loop can be formed with the furnace outlet temperature.
I agree with the opinion above; using an inverter to adjust the current of the sulfuric acid pump in order to control the amount of liquid sulfur is a practical method.
Theoretically, it is feasible to control the sulfur injection amount by comparing it with air, but in practice it is not very practical. Accurate and reliable flow meters for both air flow and liquid sulfur are required, yet it is difficult to maintain accuracy in both flows over the long term.