Apr. 06, 2021
Which Impeller Is Suitable For Slurry Pump
The impeller is one of the most important parts of a centrifugal pump. Depending on your application, the choice of the impeller is critical to pump performance. The application of slurries to pump impellers can be particularly difficult because of their abrasive nature. In order for your process to run efficiently and stand up to the test of time, you must choose the right impeller.
Depending on the application, each impeller has its own advantages and disadvantages. Some are suitable for solid processing, and others are suitable for high-efficiency processing.
Any type of impeller can be used for slurry applications, but open impellers are more common because they are less likely to block. Enclosed impellers usually do not handle solids well, and if they become clogged, they are also difficult to clean. For example, small fibers in pulp may block the impeller if the density is high. Pumping slurry is very difficult, you have to avoid pump blockage at all costs.
The size of the slurry pump impeller must be considered to ensure that it can withstand abrasive wear. Compared to liquid pumps with less abrasive properties, slurry impellers are generally larger in size. The more "meat" the impeller has, the better it can perform the task of pumping coarse mud mixtures. Think of the impeller of a pump as the offensive line of a football team. These players are usually large and slow. Throughout the game, they were beaten again and again, but they were expected to be able to withstand this abuse. You don't want small companies in this position, just like you don't want a small impeller on your mud pump.
Your process speed doesn't have anything to do with choosing your impeller, but it does have an effect on the life of your impeller. It is important to find the sweet spot that allows the pump to run as slow as possible, but fast enough to keep solids from settling and clogging. If you are pumping too fast, the slurry can quickly erode the impeller due to its abrasive nature. This is why it is important to select a larger impeller if possible.
When you're dealing with slurry, you generally want to go bigger and slower. The thicker the impeller, the better it will hold up. The slower the pump, the less erosion you'll inflict on the impeller. However, the impeller isn't the only thing you have to worry about in your pump when dealing with slurry. Tough, durable materials of construction are necessary most of the time. Metal liners and wear plates are common in slurry applications.
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