Seeking advice on a mixer issue
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I would like to ask experienced professionals for advice: regarding slurry tanks, how are the number and size of the impeller blades typically determined? And for slurry tanks operating under high temperature and pressure, how can excessive flashing and foaming that occur during mixing be prevented? Thank you
It depends on the specific circumstances: the size of the tank, the solid content in the slurry, and the state of the slurry. Experience plays a significant role here
The number and size of the blades can be consulted with specialized manufacturers; reducing the amount of material undergoing flash evaporation can help lower the temperature or increase the pressure. To avoid foam, an antifoaming agent can be added.
Thank you for your reply. The temperature and pressure cannot be changed arbitrarily, as this affects the particle size. Adding an antifoaming agent is even less feasible; moreover, separating the antifoaming agent as an impurity presents another problem that cannot be resolved, or it would require additional processing steps to remove it, which is not cost-effective. Because the presence of foam has a significant impact on our liquid level, causing issues with false readings, which have a considerable effect. So I’m asking everyone if it might be possible to reduce foam formation inside the equipment by modifying its mixer and the internal structure of the container
The volume of the tanks is roughly between 300 and 500 M3, with a solid content of between 20 and 40%. Since this issue has always existed in this industry, let’s see if anyone has any better ways to reduce its occurrence
It doesn’t specify what industry it is, nor what the solid and liquid phases are in the slurry – how can anyone else help you then? If the solid phase of the slurry is sand and the liquid phase is water, with no surfactants such as laundry detergent added, the common types of impeller blades generally will not cause the foam problem you mentioned.
There are no conditions at all, so it’s impossible to estimate,,,