Selection of desulfurization slurry transfer pumps for flue gas desulfurization plants
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Dear sea friends, I often come across posts stating that centrifugal pumps are used for transporting desulfurization slurry in flue gas desulfurization plants. However, desulfurization slurry is characterized by high abrasiveness, high corrosivity, and high cavitation tendency; using centrifugal pumps in such applications will inevitably lead to serious problems. As far as I know, diaphragm pumps with polypropylene pump heads can also be used for this application, and they are likely more suitable for it. Why wasn’t this type of diaphragm pump considered during the selection process?
This post was last edited by zhangqi1234 on 2016-5-12 at 20:46. Desulfurization pumps operate under conditions where the flow rate is quite high; they are subject to high levels of corrosion and abrasion. There are many manufacturers of centrifugal pumps available, and some specialize in pumps for desulfurization slurries. There are various options in terms of material – metallic or non-metallic – and these pumps can handle flow rates of several thousand cubic meters per hour. I’m not sure what the advantages of diaphragm pumps are; I hadn’t learned about them before.
Diaphragm pumps have relatively high pressure and low flow rate, making them unsuitable for desulfurization purposes.
This post was last edited by kevinzhu2015 on 2016-5-13 at 15:50. Yes, if the flow rate is high enough, a centrifugal pump will suffice; however, due to the corrosive and abrasive nature of the medium, materials that are resistant to wear and corrosion must be used in the construction of such pumps, which means the cost of the pumps will not be low. If the flow rate isn’t high, I think a diaphragm pump would also be a good option. Diaphragm pumps have significant advantages when dealing with corrosive or abrasive media; they are also more energy-efficient and less prone to clogging. Cavitation does not occur either when transporting a medium containing a small amount of gas.
I haven’t checked specifically, but in early ceramic factories, diaphragm pumps were used for the slurry pumps in the drying towers, and they made a lot of noise.
Diaphragm pumps belong to the category of reciprocating pumps, and they inevitably generate noise during operation; however, when working properly, the noise level is not very high