Exchange on processes, technologies, and operational status of renewable sulfur dioxide removal
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There are already several systems for renewable sulfur dioxide removal in operation across the country; how is their performance?
I have seen several sodium-alkali-based desulfurization systems, and their operating costs are extremely high; for a smoke volume of 100,000 units per year, the operating cost amounts to 10 million yuan (after deducting the revenue from selling sodium sulfite)
Reply to 2# zhuzhou*nglong: How is the system performing? Is the system clogged? What are the problems?
This post was last edited and replied to by zhuzhou*nglong on 2011-7-24 at 17:44. Reply 3# renyi7552: There is no clogging, as sodium hydroxide is used for desulfurization. The by-product sodium sulfite can be converted into a product for sale. Disadvantages: The initial investment is approximately 3 times that of the conventional lime-gypsum method, and the operating costs are also about 3 to 5 times higher.
Of course, it depends on economies of scale – is there any bottleneck in the production process? Do you know anything about this?
I know a fair bit about it, and I also know where the blockage is. Blockages mainly occur in the centrifuge and the crystallization reactor sections; there are also some blockages in the material pipelines. After it was put into use, it was modified many times; debugging took about two years. Initially, the sodium hydrosulfite content was only 40–50%, but now it can reach around 90%. You can go and take a look at the Zhuzhou Smelting Plant
What is the SO2 concentration in the exhaust gases from the Zhuzhou Smelting Plant? Whether it is cost-effective is the key.
Operating costs: with a smoke volume of 100,000, the annual operating cost amounts to 10 million. Is it really that high? It seems that our magnesium-based method is indeed low-cost!
Could you talk about organic amines? How about Panzhihua?
If you’re interested, we can discuss it in more depth.
Is the activated carbon adsorption method useful?