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The applications of triple shaft mixers

April 20, 2013

Things are changing quite rapidly all around us. The pace has crept into practically all walks of life. The world of industrial mixers was recently revolutionized by the birth of the multi shaft mixer system, which involves the ability to conduct two separate mixing processes within the same mixing tank. This is made possible by the simultaneous presence of two or more shafts performing different functions within the mixing container. This speeds up the mixing process, and at the same time makes the degree of homogenization much greater, leading to a drastic improvement in the quality of homogenized material that can be industrially manufactured today.

The multi shaft system may be of two types – the dual shaft and the triple shaft types. In both these typologies, the underlying principle remains the same. An anchor blade sweeps the walls of the mixing vessel, thus churning the ingredient materials. At the same time one or more other shaft or shafts are present, that additionally break up the particles of the ingredients into much finer ones. Thus, the required homogenized state is achieved much sooner than if the conventional mixing system had been used; also, if the process is conducted for a little longer, the quality of the final product will be much better than was ever possible in the traditional system that could only enable the attainment of a very basic and hardly fine enough particle size.

The triple shaft mixer is similar to the dual shaft system, with the addition of a high speed shat that is located opposite the low speed shaft. Sometimes a rotor stator homogenizer can be used as a third shaft, especially when liquid emulsions are involved.

The standard sizes of the mixer system can go up to 3500 gallons. Configurations can vary from hoist to tank mounted types. The material of the shafts may be either stainless steel or carbon steel, as the case may be. These in turn are available in a variety of finishes, from mild to highly polished. Often, a power backup system is included as a part of the package, and so are specific electrical components for safety concerns. The internal shape of the tank may be either helical for better circulation combined with easier control over fluctuations in temperature, or the standard anchor sweep low speed blade type. The mixing system may be vacuum or pressure controlled, as required for the specific process.

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