The issue of desulfurization resistance

1. It may be due to blockage of the desulfurization tower packing. Solution: Stop the machine and remove the filler. 2. The imported gas distributor may be clogged. Solution: Stop the machine and clean the gas distributor. 3. The system load is too high. Treatment method: Reduce load.

We have also encountered such problems before, but using a tower cleaning agent worked quite well; it at least prevented one shutdown. You can try contacting Changchun Baoli’s PDS-600 tower cleaning agent.

Replying to the person above: Using this method can yield some results, but to deal with the issue completely, the method suggested in post 2 is necessary. In fact, the key really is to strengthen daily management – that’s what matters most.

This post was last edited by Chemical Gas Purification on 2011-6-14 at 17:02. Desulfurization may seem simple on the surface, but the real challenge lies in the details; it is entirely possible to ensure the long-term, stable operation of the desulfurization process. It mainly relates to daily processes and operational management; the key lies in controlling the parameters of the solution after regeneration as well as the gas-liquid ratio. Under no circumstances should the circulation volume of the solution be reduced significantly just because the load is low and the sulfur content in the feed is low – you need to find a way to address this issue. Sulfur recovery is also important. Daily operations must not be careless at all; any blockage inside the tower is related to deviations in system parameters during a certain shift or over a certain period of time, and such issues accumulate over time. Once the resistance increases significantly, the only option is to try to maintain operation; stopping the machine and removing the tower would result in a major production accident. When the first signs appear, it is still effective to clean the tower by adjusting the composition of the solution and taking advantage of periods of low load to increase the circulation rate of the solution; in many cases, this can fully restore the system to normal operation. However, since the tower has already been damaged, it is more likely to become clogged later on, so extra care is required. . .

I fully agree with the view expressed above; any issues that arise in daily management must be addressed promptly.

Reply to 1# Duan Yanhui: Could the original poster provide the various process performance indicators related to the current operation of the desulfurization system? This will help in conducting a detailed analysis of the issues. The main information provided includes equipment specifications and models (mainly desulfurization towers and regeneration tanks), operating gas volume, gas composition, liquid composition, operating pressure, temperature, etc.

Desulfurization tower: φ3600×34×32890, volume 314 m3, material 16MnR; gas used for desulfurization is a tannin solution. The flow rate of gas in operation is approximately 60,000 cubic meters. The components of this gas are carbon monoxide, carbon dioxide, and hydrogen. As for the liquid component, tannin-based methods are used for desulfurization. The pressure is generally between 15.5 and 16 KG, while the temperature in the regeneration tank is usually maintained between 38 and 42 degrees; this value varies in summer and winter. Teacher, have you encountered situations in urea production plants where the desulfurization resistance fluctuates frequently after the transformation process? How is this usually addressed? ? ?

Also, I would like to ask the teacher: where can I find information on more advanced production processes for melamine, flowcharts, and other related materials? Do you have one? ? ? Thank you so much!

Thank you all for your replies. I would like to ask how your organization handles its daily management What are the general indicators for control? 、

It is addressed or prevented from several aspects: 1. Preventive measures taken in advance, such as strictly controlling the process parameters to remain within reasonable ranges to ensure effective desulfurization, as well as ensuring that the pipes and equipment used in the initial design are appropriate； Strengthen gas washing before desulfurization to ensure effective washing. 2. In the event of such situations, it is necessary to reduce the flow rate of the gas promptly; this can lower the desulfurization resistance and improve the operating efficiency of the compressor ； Ensure that the liquid level in the desulfurization tower remains normal, in order to avoid situations such as the tower being flooded. 3. Passive treatment involves carrying out cleaning tasks on the desulfurization system and the gas washing system during shutdowns, beyond a reasonable cleaning cycle. These are just a few simple suggestions.