Selection of sulfuric acid circulation pumps for chlor-alkali plants
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Pump type: Horizontal. Medium: 65–98% sulfuric acid is used in the drying tower. Flow rate: 110 m³/h. Head: 30 M. Pump inlet diameter: DN100. Pump outlet diameter: DN80. A fluoropolymer centrifugal pump was originally used, but acid sludge leaked from the mechanical seal, which was quite troublesome; therefore, a replacement is planned. I seek advice from experts on this matter. One magnetic pump manufacturer said it doesn’t dare to take the risk of using magnetic pumps
The circulation pumps used in drying towers may contain solid dust impurities. Using magnetic pumps carries certain risks; they are expensive, and their spare parts wear out quickly. Fluoroplastic pumps, equipped with an internal mechanical seal and P62 flushing, represent an ideal solution. Ningbo Wanhua has 5 sulfuric acid drying circulation pumps with a capacity of 280 cubic meters each and a length of 30 meters. These pumps have never had any problems – mechanical seals typically last for over a year, with some even lasting up to 24 months. The inner part of these seals is made of integral silicon carbide
The PTFE-lined pump we need is very stable
This is the concentrated sulfuric acid circulation pump used in the chlorine drying unit, right?
For the dilute acid circulation pump, the internal seal is sufficient