Discussion on the recovery technology of magnesium oxide desulfurization solution
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Currently, there are various opinions regarding magnesium oxide desulfurization solution recovery technologies! But there are few applications! However, considering that the existing magnesium-based desulfurization processes are mostly of the aeration and waste liquid disposal type! For recovering magnesium sulfate using this process, it is essential to address the following two issues: First, does the high concentration of magnesium sulfate (20%~28%) affect the desulfurization efficiency of the slurry containing magnesium sulfite and magnesium oxide? II. Under the operating conditions of a mixed slurry containing magnesium sulfite, magnesium sulfate, and magnesium oxide at 50°C, what is the maximum allowable concentration of magnesium sulfate that can be present due to cyclic aeration? I earnestly hope that experts in this field will not hesitate to offer their guidance! :handshake
Hehe! There are no talented people in this industry! :L
Hehe, my post! It’s meant to help those in the industry distinguish right from wrong! :loveliness:
There’s no need to argue about right and wrong; otherwise everyone will start fighting. It’s fine to have discussions instead
Am I being too harsh? It’s just meant to spark everyone’s enthusiasm for speaking! :handshake
1. Magnesium sulfite must be oxidized to magnesium sulfate; the concentration of magnesium sulfate should be maintained at 15%-20%, with a desulfurization efficiency of over 97%. 2. The magnesium sulfite concentration should be below 1%; too high a concentration will cause scaling, blocking of nozzles, pipes, etc. 3. With a magnesium sulfate concentration maintained at 15%-20%, it is economically feasible to produce magnesium-sulfur fertilizer using multi-effect evaporation and recrystallization. 4. The current bottleneck is that power plants lack chemical engineering talent and management experience, and they show no interest in recycling magnesium-sulfur fertilizer. 5. I am currently negotiating the use of a BOT operation model to recover magnesium sulfate.
**The environmental protection authorities are preparing to introduce regulations to limit the sulfate content in desulfurization wastewater, setting this level at no more than 2000 milligrams per liter. Although these regulations have not been implemented yet, it shouldn’t be long before they are put into effect! Therefore, in the case of magnesium-based desulfurization, discharging the magnesium sulfate solution directly may not be feasible in the future! How about one of yours?
Does anyone among those here have the specific parameters for magnesium oxide desulfurization, such as flue gas temperature, flow rate, concentration, etc.? Thank you
The two newly commissioned 65-ton boilers use the magnesium oxide method for desulfurization; the process involves dissolving and aging magnesium oxide, which is then transferred to a circulation and regulation tank. The desulfurization circulation pump sends the fluid to the desulfurization tower for desulfurization. The desulfurization liquid enters the aeration tank from the bottom for aeration, and the slurry after aeration goes to the sedimentation tank for sedimentation. The precipitate is pumped using a slurry pressure filter pump to a box filter for filtration; the filter cake is utilized in various ways, while the clear liquid goes into a circulation tank for reuse. According to online monitoring by environmental protection authorities, the levels of sulfur dioxide and nitrogen oxides are within acceptable limits. The dust level is above the standard due to inadequate dust removal equipment; the next step is to upgrade this equipment.
What form is used for magnesium sulfate heptahydrate dryers?