Problems with the NHD desulfurization process!
Thread Content
What are the reasons for high hydrogen sulfide levels in the lean solution in the NHD desulfurization process?
The circulation volume is insufficient, the water content is too low, resulting in poor regeneration effects. It is recommended to increase the water content, raise the circulation volume, and lower the temperature of the solution.
Just some personal opinions, hehe:)
There are two reasons: first, the circulation volume is low during rich liquid regeneration; second, the relatively low temperature and high pressure during regeneration result in incomplete desorption of hydrogen sulfide. So it’s sufficient to change one of the two operating conditions; increasing the circulation rate is simple and effective!
The regeneration quality is poor, and the dehydration is not good.
It is estimated that the regeneration temperature was too low, which affected the regeneration effect.
1. The pressure in the regeneration tower is too high. 2. The flow rate of the recycled water back to the system is too low, resulting in an excessively low water content in the system and affecting the regeneration process. 3. The heat load of the regeneration tower is low, and the temperature at the bottom of the regeneration tower is low. 4. Problems with the packing or solution distributor in the regeneration tower affect heat and mass transfer, thereby impacting the regeneration process. On the premise of stable system load, by maintaining a steady solution circulation rate, using an appropriate amount of steam, adjusting the return flow rate, and ensuring that the temperatures at various points in the regeneration tower meet the design specifications, regeneration can be achieved.
What was said on the 7th floor is correct – operate in accordance with the process specifications, and ensure that the process conditions are met. It is recommended that you analyze the hydrogen sulfide levels at the inlet and outlet of the rich-lean liquid heat exchanger to check for any leaks :) This is also a concept
Support all viewpoints； I’m learning about the relationship between regeneration and dehydration!* ! !
1. Poor operation of the regeneration tower, resulting in low regeneration efficiency. 2. High sulfur content in the feed gas. 3. Low circulation rate of the solution. 4. High temperature of the lean solution. 5. High water content in the lean solution. 6. Large fluctuations in system pressure
1. Circulation volume 2. Whether moisture is balanced (this needs to be figured out gradually) 3. Absorption temperature and pressure 4. Regeneration temperature and pressure 5. Total sulfur content in the feed gas 6. Liquid level fluctuations 7. Dirty solution