Friends interested in tannin desulfurization, please come and learn together*

Tannin-based desulfurization is a relatively mature wet desulfurization technique that is effective at removing inorganic sulfur. However, it has significant drawbacks: it is less effective at removing organic sulfur, causes severe pollution, and is also somewhat corrosive to equipment

It is a very old desulfurization process; its desulfurization efficiency is indeed good, but it comes with a series of instability issues, such as sulfur blockages. The sulfur sludge in the solution tank cannot be removed automatically and tends to accumulate. Attempts to use pumps to remove it have not yielded satisfactory results. This process is relatively suitable for low-sulfur coal processing in the coal chemical industry

I don’t understand and have no new place to go, so I’ll come in and listen to what you guys say. :lol

In the desulfurization of tannin, the following problems are likely to occur during variable desulfurization: 1. The ratio of tannin to vanadium is difficult to control, resulting in unstable processes. (Large analysis error) 2. There are many air bubbles in the regeneration tank during winter, and they are difficult to control. It affects environmental protection. 3. It lacks the ability to remove organic sulfur, and is generally used in combination with titanium-chelate cobalt-based desulfurizers such as 888 and PDS. 4. The curing process is relatively complicated and time-consuming, involving requirements for alkalinity and an air oxidation step, among others. ):handshake :lol The last edit to this post was made by 7276166 on 2008-2-15 at 21:14 ]

Thank you, I really need this kind of knowledge

Our company uses a combination of tannin and TTS desulfurizing agent; the removal effect is quite good. However, it is necessary to control the amount of TTS added to prevent clogging of the injectors due to TTS

In case of tannin-based desulfurization, the low efficiency of the sulfur melting tank or improper control of the composition ratios in the desulfurization solution can lead to an excessive amount of suspended sulfur in the solution, which affects its desulfurization effectiveness. This in turn causes blockages in the nozzles of the desulfurization tower, pipes, and regeneration tanks, as well as an excessively high system pressure difference. This should increase the residence time of the desulfurization solution in the sedimentation tank, allow for the timely removal of sulfur sludge from the sedimentation tank, and ensure regular removal of the sulfur sludge that accumulates at the bottom of the regeneration tank, the lean solution tank, and the circulation tank. Additionally, the composition of the desulfurization solution should be adjusted as appropriate.

The biggest problem with tannin gum desulfurization at present is what to do with the liquid coming out of the sulfur melting tank. Discharging it directly is certainly not an option; however, to return it to the desulfurization system, it must go through a series of cooling and filtering processes. Moreover, the treated liquid has a significant impact on the components of the solution system

Are there any colleagues who are good at operating sulfur melting furnaces? Please share your insights so that we can all learn from them. This post was last edited by wangwanglyu on 2008-2-25 08:49.]

Tannin-based desulfurization achieves good results; using processed tannin, the preparation of the solution is not complicated, and it generally has a low cost along with mature technology. It easily produces by-products, can cause tower blockages and equipment corrosion, and is unable to remove organic sulfur. When the ratio of glue to alum is not well controlled, the suspended sulfur content in the lean solution is high, which affects the sulfur melting process in the melting tank; as a result, the quality of the melted sulfur is poor and its quantity is low. The returned clear liquid should be cooled and allowed to settle before being added back to the lean solution tank; any material that contaminates the environment should be discarded. The regeneration tank, lean liquid tank, and reaction tank should have their sulfur scales thoroughly cleaned every year; otherwise, the equipment will get clogged, affecting the desulfurization process.

The key aspect of the sulfur melting tank is determining how to handle the clear liquid that results after sulfur has been melted. Returning this liquid directly to the system has a significant impact on the components of the tannin-based desulfurization solution; it is necessary to go through a series of cooling, filtering, and purification processes. Additionally, it is important to analyze the clear liquid carefully, as well as to control the temperature of the sulfur melting tank to prevent the formation of metal by-products due to excessively high temperatures