Jumat, 15 Juli 2011

How Is Inline Mixing Different Than Static Mixing

By Adriana Noton


When the first chemicals were mixed, the procedure was made manually and the results were usually not too good. There was always some inconsistency in the emulsion resulted from the combination. Now, using inline mixing, the combining of chemical substances offers better results. With the use of computerized machines, a lot of money can be saved in production and transportation. The first machines that were used were static mixers. After some time, combining chemicals became an automated technique and the production time was decreased.

Emulsions contain water in a high amount, reaching even ninety percent sometimes. It may not be enough just to have better blending, as these diluted chemicals occupy very much space and they usually generate various issues. Some problems are related to transportation, as the emulsions can degrade during transports.

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.

When it comes to continuous blend, it began to be used in 1990. A continuous blend is actually a static mixer that was encapsulated into an automated device. In order to function, the system must contain the following: a pump that is automated and 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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