Ammonia-based flue gas desulfurization

I’m not very familiar with the entire system; we have worked with Jiangnan Environmental Protection and manufactured many fiberglass equipment and pipelines for them. It is recommended to reach out to friends from Jiangnan Environmental Protection; they have done a lot of work.

I’m not sure what the specific manufacturing process for your device is. The maximum load of the ammonia-based desulfurization unit is primarily limited by the sulfur content in the coal used, the boiler load, and the parameters of the flue gas entering the unit. As for the concentration of ammonia solution, if the concentration is high, the operating costs will definitely be high; using waste ammonia solution reduces the costs. The relationship between the desulfurization efficiency and the concentration of ammonia solution is not very significant ； There are many factors that can cause a delay in product discharge. First, it is necessary to measure the pH value and concentration of sulfurous acid AN; it might be due to high levels of dust, especially in electrostatic precipitators that have been in use for several years, as their dust removal efficiency is poor, leading to the accumulation of sulfurous acid AN and sulfuric acid AN dust and thus preventing product discharge. It is recommended that during the first operation of the facility, the desulfurization tower be emptied after about a week of operation; this step is usually sufficient for subsequent operations.

What limits the maximum load that the device can handle? Is it sufficient to have a high concentration of ammonia, or is there something else involved? Is it also possible that the reason for no output over a long period of time is that sulfurous acid AN has not been further oxidized? Thank you all. The main factors affecting the load on the device are the volume of gas and its sulfur content; the ammonia concentration should not be too high, as high concentrations lead to easy volatilization of ammonia (resulting in high ammonia consumption). The failure to produce output over an extended period might be due to too low sulfur content in the flue gas! Sulfurous acid AN easily crystallizes inside the absorption tower, causing pipe blockages, which indicates that the concentration of sulfurous acid AN in the absorption tower is not too high.

Maximum load? It’s the air volume and sulfur content, right? Let’s see what operating costs you can afford A higher air flow rate and lower sulfur content result in a higher ammonia escape rate, which directly affects the treatment costs. Moreover, imported dust has a high content, and high air flow rates can affect the quality of the by-product ammonium sulfate, as well as impacting operating costs. The choice of crystallization drying method is also such that absorption can occur at the front, but extraction is not possible at the back; thus, the load can only be reduced. Generally speaking, standard design institutes include a margin in their designs; as long as the raw coal (gas) remains unchanged, this is not something the client needs to worry about.

Thank you; this is cyclic absorption, followed by concentration and discharge via centrifuge. I see that some processes involve evaporation for concentration; I’m not sure which one is better

There is no such thing as one that is definitely good and another that is definitely bad. These days, multi-effect evaporation is widely used; if one has an excess of steam, it is definitely the preferred option.

Which company offers the best process package for ammonia-based desulfurization?

Yunnan Asia-Pacific Environmental Protection is available for inspection

I work in desulfurization as well; according to what my colleagues say, Wuhan Urban Environmental Protection does a good job； Jiangnan is also good, but it uses fiberglass towers, which are not suitable for **bands.