Purification Technology Edition: Daily Question [2017-11-3]
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Why does the nitrogen stripping continue without interruption, even after the purification process stops and the methanol circulation remains active? Answer: Because the methanol in the cold zone still contains a large amount of carbon dioxide after the gas supply is stopped, if nitrogen is removed under these conditions, a large amount of carbon dioxide will be carried into the regeneration tower, causing overpressure in it. This will result in a significant drop in the flow rate of the feed pump for the regeneration tower, as well as a sharp rise in the liquid level at the bottom of the hydrogen sulfide concentration tower.
Because the methanol in the cold zone still contains a large amount of carbon dioxide after the gas supply is stopped, if nitrogen is removed under these conditions, a large amount of carbon dioxide will be carried into the regeneration tower, causing overpressure in it. This will result in a significant drop in the flow rate of the feed pump for the regeneration tower, as well as a sharp rise in the liquid level at the bottom of the hydrogen sulfide concentration tower.
Since the methanol in the cold zone still contains a large amount of carbon dioxide after the gas supply is stopped, if nitrogen is removed under these conditions, a large amount of carbon dioxide will be carried into the regeneration tower, causing overpressure in it. This will result in a significant drop in the flow rate of the feed pump for the regeneration tower, as well as a sharp rise in the liquid level at the bottom of the hydrogen sulfide concentration tower.
Since the methanol in the cold zone still contains a large amount of carbon dioxide after the gas supply is stopped, if nitrogen is removed under these conditions, a large amount of carbon dioxide will be carried into the regeneration tower, causing overpressure in it. This will result in a significant drop in the flow rate of the feed pump for the regeneration tower, as well as a sharp rise in the liquid level at the bottom of the hydrogen sulfide concentration tower.
Because the methanol in the cold zone still contains a large amount of carbon dioxide after the gas supply is stopped, if nitrogen is removed under these conditions, a large amount of carbon dioxide will be carried into the regeneration tower, causing overpressure in it. This will result in a significant drop in the flow rate of the feed pump for the regeneration tower, as well as a sharp rise in the liquid level at the bottom of the hydrogen sulfide concentration tower
Why does the nitrogen stripping continue without interruption, even after the purification process stops and the methanol circulation remains active? Answer: Because the methanol in the cold zone still contains a large amount of carbon dioxide after the gas supply is stopped, if nitrogen is removed under these conditions, a large amount of carbon dioxide will be carried into the regeneration tower, causing overpressure in it. This will result in a significant drop in the flow rate of the feed pump for the regeneration tower, as well as a sharp rise in the liquid level at the bottom of the hydrogen sulfide concentration tower.
Since the methanol in the cold zone still contains a large amount of carbon dioxide after the gas supply is stopped, if nitrogen is removed under these conditions, a large amount of carbon dioxide will be carried into the regeneration tower, causing overpressure in it. This will result in a significant drop in the flow rate of the feed pump for the regeneration tower, as well as a sharp rise in the liquid level at the bottom of the hydrogen sulfide concentration tower.
Because the methanol in the cold zone still contains a large amount of carbon dioxide after the gas supply is stopped, if nitrogen is removed under these conditions, a large amount of carbon dioxide will be carried into the regeneration tower, causing overpressure in it. This will result in a significant drop in the flow rate of the feed pump for the regeneration tower, as well as a sharp rise in the liquid level at the bottom of the hydrogen sulfide concentration tower.
Because the methanol in the cold zone still contains a large amount of carbon dioxide after the gas supply is stopped, if nitrogen is removed under these conditions, a large amount of carbon dioxide will be carried into the regeneration tower, causing overpressure in it. This will result in a significant drop in the flow rate of the feed pump for the regeneration tower, as well as a sharp rise in the liquid level at the bottom of the hydrogen sulfide concentration tower
Gaseous nitrogen further strips carbon dioxide, while the regeneration tower continues to regenerate and remove hydrogen sulfide from methanol.
Answer: Because the methanol in the cold zone still contains a large amount of carbon dioxide after the gas supply is stopped, if nitrogen is removed under these conditions, a large amount of carbon dioxide will be carried into the regeneration tower, causing overpressure in it. This will result in a significant drop in the flow rate of the feed pump for the regeneration tower, as well as a sharp rise in the liquid level at the bottom of the hydrogen sulfide concentration tower.