Friday, July 15, 2011

The Meaning Of Inline Mixing In Comparison To Static Mixing

By Adriana Noton


In the past, when large batches of chemicals had to be mixed manually, the results were not as good as they should. The substances that resulted after the combination were many times inconsistent. Today, with the use of the inline mixing technology, the emulsions are becoming better. The computerized machines can be very efficient, saving a lot of money in transports and production. At first static mixers were used, and later everything was becoming automated, speeding up production in this way.

In emulsions, there is always a large amount of water and the amount can reach ninety percent, many times. Obtaining a better blending may not be the only important thing, because storage space must also be seen as an important factor. There can be a lot of problems because of the lack of space, but bad transportation can also create issues, as it can degrade the emulsions.

The price of transporting the chemicals may be high and because of this, some companies which use many fluids in their business may be forced to keep them in storage for longer periods of time. If too much time passes, the stored liquids can create a proper environment for the growth of bacteria. To avoid the growth of microorganisms, professionals have decided to use the technologies that the textile industry is already using: static mixing and inline mixing (continuous blend).

The main advantage of static mixers is that moving parts are nonexistent in them. The creation of the first static mixer happened in 1960. The particles from the substances are divided until they are very small. Once the desired dimension has been reached, the parts can come together. Many divisions can be made until the particles are small enough to join. With the use of baffles, the streams are divided multiple times, creating a consistent mix.

Continuous blend or inline mixing was first used around 1990. Being made from a static mixer that is implemented into an automated machine, it also has an automated pump and one or more flowmeters.

The parts needed for the system to work are usually chosen according to the number of chemical substances that have to be mixed and according to the volume needed. In the textile industry and not only in it, the components that have to be contained by an inline mixer are: static mixers, mass flowmeters, inline heaters, progressive cavity pumps and programmable logic controllers.

The quantity of every substance that is forced in the mix is managed by mass flowmeters, which can also provide various details for the substance, such as density or temperature. For handling the movement of the chemicals, the progressive cavity pump can be of great help. There are many substances that can be controlled by a progressive cavity pump and these products can be abrasive fluids, but also clear liquids.

Because of a new technology, inline mixer mixing is an automated operation and it can be used for creating combined chemical substances. In comparison with the old static mixers, the automated devices are more efficient and they make better emulsions. However, a static mixer can be a part of an inline system.




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