Overflow from the desulfurization solution circulation tank in the ammonia-based desulfurization process for coking by-products
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In the ammonia-based desulfurization unit of our company’s coking chemical production process, sulfur cannot be removed, which results in the formation of a large amount of foam in the regeneration tower. This foam enters the solution circulation tank, causing excessive overflow from it. What is the cause of this phenomenon? How to handle and resolve it? How to prevent it? I would appreciate your advice!
Could you explain it in more detail? Is it tower regeneration? It’s not an integrated tower, right? If high-tower regeneration is used and overflow occurs in the circulation tank, it means there is a problem with the circulation fluid not being able to flow out; it is necessary to check carefully for blockages in the overflow pipe from the regeneration tower to the desulfurization tower, as well as in the inlet pipe of the liquid distribution tray in the desulfurization tower
It is tower regeneration, not a single integrated tower; large amounts of foam emerge from the solution circulation tank.
One reason is that the liquid level in the circulation tank might be high; even if foam forms in the tank, it won’t overflow. Another key aspect is the control of the regeneration process – sulfur foam should be generated as much as possible in the regeneration tower and blown out, which requires an adequate supply of compressed air. Otherwise, the sulfur produced cannot be removed and returns to the desulfurization tower, increasing the risk of blockages in the tower and making it more likely for foam to form in the circulation tank
This is caused by an incomplete recovery of polysulfides in the foam; it is recommended to identify the reason for the weak foam, and the desulfurization agent manufacturer can be consulted for on-site assistance to determine the cause as soon as possible
The key issue is that the concentration of the circulating liquid is too high, the salt content in the desulfurization solution is excessively high, and the effectiveness of the desulfurizing agent is poor, all of which result in a large amount of foam emerging from the outlet of the circulation tank. The best solution: The emergency remedy is to perform large-scale replacement of the desulfurization fluid ； The long-term solution is to deal with the high salt content in the desulfurization liquid.
The main task is to clarify the regeneration issue: why do a large number of void bubbles form, resulting in poor regeneration and problems with oil carrying? High salt content? Once regeneration is complete, the problem will be solved