A hi-pass static mixer is used basically for handling non-fouling and non-plugging sludge. These mixers are specifically designed for mixing polymer solution with sludge flows prior to the dewatering process.
The principal advantage of this hi-pass static mixer is that it not only increases operational efficiency but ensures polymer savings of more than 25%.
Each mixing element that a hi-pass static mixer has sweeps up to two-thirds of a pipe’s circumference. Furthermore, it directs the material’s flow to the opposite side, providing a radial high wall-to-wall transfer.
The mixer comes with a standard set of 4 elements. Each element has 3 internal cavities to indulge more contacting because of flow impingement and natural reversal.
This static mixer is also known for its large radius and smooth contours. All element ends are at oblique angles with the wall. This implies that no corners exist to trap fibrous or solid materials. It’s basically a self-cleaning gadget and is capable of passing individual items with a diameter of up to half of the sludge mixer.
The hi-pass static mixer is designed specifically to resist clogging or fouling, as its elements have smooth contours and a large radius. This makes it ideal for use in the water industry known for its plugging and fouling problems which lead to loss of production because of constant maintenance and cleaning.
Moreover, the dewatering process associated with polymer solutions is a problem for many companies. Using a hi-pass static mixer has led to considerable polymer savings. The set of 4 elements that come with the mixer to kick start the mixing action, also includes 3 inter-set cavities.
The mixing is not dependent on trailing vortex flow or any standing. Thus, the mixing process doesn’t get affected by the incoming flow.
The top end hi-pass static mixers combine three state-of-the-art mixing technologies: cross current, two-by-two and counter-rotating vortices to create back mixing. This has eliminated the tunneling or streaming effects that were seen in static mixers earlier on.
These mixers are being used by municipalities and public bodies extensively because of their resistance to fouling and/or clogging. With more and more city waste being generated every day, this has become a chronic problem and hi-pass static mixers could surely make a difference here.