Existing in-line mixers now being marketed in the pulp industry were initially designed to satisfy mixing needs in other industries. Our experience with these mixers has shown them to be far superior to any dynamic mixer for the reasons listed above, but because they are not designed specifically for the pulp application, they have certain inherent short-comings. The Systematix in-line mixers are designed specifically for the pulp industry. The design is optimized to accommodate the media and consistencies common to the industry. This specific design has permitted us to optimize the design parameters within very narrow ranges to provide the most efficient mixer on the market today.

 

 

Systematix in-line mixers, as do other in-line mixers, operate on the principle of flow splitting, angular rotation, rollover, and turbulence of the stock stream to accomplish mixing.

 

We have extended these principles one step further through a combination of our mixer design and our custom sizing policies. Each mixer element is designed to generate four vortices at each element interface. These turbulent streams are vectored alternately from the outside to the inside and from the top to the bottom of the mixer, creating a complete and thorough mixing of the stock and chemical within the length of the mixer. This ensures maximum exposure of the pulp to the chemical, promoting the rapid, efficient reaction necessary in today's modern pulp mill.

 

The mixers are carefully designed to provide maximum mixing with minimum pressure drop, and velocities are carefully controlled to avoid disassociating the entrained chemicals from the water media. In dynamic mixers, the tip velocity of the mixer blades can exceed 70 fps (21 m/s), creating severe low pressure areas on the back side of the blades, which literally sucks the chlorine out of the water.