How should the acidic gas emitted from the water seal tank above the raw water tank in the acidic water stripping unit be treated?
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The pressure is around 1.5 kPa, so it can’t enter the flare gas main; moreover, venting it at a higher altitude raises concerns in case something goes wrong with H2S. . I’ve been struggling with this for a long time and haven’t come up with any particularly good solutions. I hope someone experienced can give me some advice. O(∩_∩)O Thank you @ylb913
This post was last edited by ylb913 on 2015-7-8 at 13:21. We use water washing with ammonia, amine washing for sulfur removal, and the final step is deodorization. For three months, there was basically no unpleasant odor from the atmospheric emissions at that location; but then a thunderstorm struck, and the gases ended up in the acidic gas flare, and that’s the situation ever since. The acidic gas flare has suction, creating a negative pressure; a water seal has been installed, and nitrogen is injected when negative pressure occurs, resulting in a pressure of a few hundred pascals. I’ve always wanted to implement pressure recovery, but several proposed solutions turned out to be unsuitable, so none of them were put into practice.
How can an acidic gas flare be under negative pressure?
Then shouldn’t an ordinary torch also have a negative back pressure?
High flow rate definitely means positive pressure. The gas flow at the top of the sewage tank is not very high; I have measured it, and the maximum normal level in our plant is less than 20 cubic meters per hour, and there is often negative pressure as well.
With the added deodorization system, including water washing for ammonia removal and alkaline solution deodorization, things are fine for now; it’s just that occasionally the ammonia level in the gas after deodorization exceeds the allowed limits
In the end, did it still end up in the acidic gas flare?
The new technology developed by the Fushun Research Institute is said to be quite good; its basic principle involves absorbing low-temperature diesel and then using alkali for cleaning
Our device is equipped with a positive pressure water seal and a safety water seal system. The raw water tank passes through the positive-pressure water seal tank before entering the amine absorption tower, then goes into the activated carbon deodorization tank, and is finally discharged into the atmosphere. The device has virtually no odor
What is the pressure in your water seal tank? Can it still enter the amine liquid absorption tower?