desulfurization

As the concentrations of salts such as NaCNS, Na2S2O2.NaSO4 in the solution increase, once a certain concentration is reached, PDS loses its catalytic properties, and the efficiency of desulfurization and decyanidation declines. On the other hand, an increasing salt concentration raises the viscosity of the desulfurization fluid, which can even lead to deposits that block the system’s pipelines, reducing the flow rate and affecting the spraying density of the desulfurization fluid. The cost of treating waste liquid is high. Therefore, finding an economically efficient method for treating desulfurization wastewater has become an urgent task. The complexed iron method for removing hydrogen sulfide has significant advantages: it involves few side reactions, and no waste gases, wastes, or wastewater are generated during normal operation. As far as I know, there is a company in Yantai that specializes in this process; you can communicate with me.

In the coal chemical industry, due to various drawbacks of the PDS desulfurization process such as high levels of by-products and severe corrosion, wet iron complexation is currently a safe and environmentally friendly desulfurization method. It can fully replace the PDS process for removing hydrogen sulfide, with low operating costs and no generation of waste materials. It is inevitable that the wet iron complexation desulfurization process will replace the PDS process in the near future.

Hello! I have been working with wet complexation iron desulfurization technology for many years; compared to the PDS desulfurization process, this technology has become a trend in the chemical industry ； PDS process: Complex process with a large number of equipment units ； Low sulfur capacity, high cycle volume ； Sulfur has high viscosity, poor formability, tends to caking, and can easily block pipes ； It is mainly made of carbon steel, but the absorption tower has a short service life due to the presence of hydrogen sulfide ； The hydrogen sulfide removal rate from exhaust gases is relatively low. Wet complexation iron desulfurization process: Simple process with fewer pieces of equipment ； High sulfur capacity, low circulation volume ； Sulfur has low viscosity, good formability, strong fluidity, and does not clog pipes ； It is mainly made of 304L material, and the equipment has a long service life ； The hydrogen sulfide removal rate from exhaust gases is high. Therefore, the wet complexation iron desulfurization process is bound to replace the PDS process.

That’s a bit absolute; then how can the quality of the sulfur ointment produced from complexed iron be improved? How can the problem of high operating costs be solved?

There are two treatment options for sulfur paste: one is to send it directly to an acid production plant to produce sulfuric acid； A process for sulfur refining to produce industrial sulfur ； As for the quality issues related to sulfur paste, these are primarily associated with the level of technology used in iron-based desulfurization processes as well as the properties of the desulfurization agents. In this field, Wuhan Guolitong Energy and Environmental Protection Co., Ltd. is a company that specializes in iron-based desulfurization; numerous industrial cases have proven that this approach is fully viable ；

In terms of operating costs, PDS units require regular wastewater discharge and salt extraction, which also incurs significant expenses； Based on our comparison of industrial applications, overall, the operating costs of iron chelation desulfurization are lower than those of the PDS system ；

Absolutely. Wuhan Guolitong Energy and Environmental Protection Co., Ltd. specializes in chelated iron desulfurization technology, and there are numerous application cases over the years in replacing the PDS process；

I know that the process is feasible; my initial interest in complexed iron was related to the L-CAT process used in oil refining

Are there any relevant comparison articles or other materials that people can refer to?