The blog about maximizing the effect of multiple frequency ultrasonics explained in some detail the mechanics of cleaning using multiple ultrasonic frequencies and the benefits of sequencing through a series of frequencies multiple times to achieve maximum cleaning effect. This blog will further explore these benefits especially in cases where extended exposure of a part …
As described in a preceding blog, changing ultrasonic frequency has a demonstrated effect on the size of particles removed from a contaminated surface depending on frequency. Low frequencies produce large cavitation bubbles which implode with high energy. High energy implosions are able to dislodge relatively large particles from a surface. Higher frequencies produce smaller cavitation …
In some cases, previously described oil removal technologies based on the gravity separation of oil from the cleaning solution are unjustifiably cumbersome and expensive. Fortunately, smaller scale solutions are available for use in such applications. Oil Skimmers – Oil skimmers utilize a material which preferentially attracts oil (hydrophobic) to skim floating oil from a surface …
As I have said before on this blog, I am not a chemist. Whatever I say about chemistry on the blog is expressed in layman’s terms and is based on practical experience and not on any deep understanding I have of the properties of chemicals. The usefulness of any information provided here applies only to …
As discussed earlier, monitoring variables in a process is a critical part of Six Sigma. The following are some examples of parameters that can be monitored in a cleaning process and some suggestions regarding how the monitoring can be done. Chemical Concentration – Chemistry (detergent, acid, rinse aid, etc.) is one of the most important components of the …
Just about everyone can recognize the benefits of sterilization to eliminate bio-burden in a plumbing system. Heat or chemicals toxic to living organisms are periodically introduced to kill the offending critters. This process can be conducted using either CIP (Clean In Place) or COP (Clean Out of Place) procedures. CIP simply means cleaning by flushing …
When parts aren’t coming clean two of the first things most process engineers target as potential problems are the temperature and concentration of the chemistry. These are, in most cases, good bets but one should resist knee-jerk reactions. Chemical Concentration – One of the common knee-jerk reactions to a cleaning problem is to increase chemical …
With this post, I have reached 200 in what may be an infinite series of blogs. So far, it has been a very interesting adventure – not only because I’ve been able to share a lot of information with you people who read this blog but because I’ve learned as well. Having been in the …
Hot air drying applications involve, primarily, the evaporation of water or another liquid such as a solvent from the surface being dried. Evaporation occurs as heated air circulates over and around the surface being dried as discussed in earlier blogs. In all cases this liquid evaporation consumes heat which results in cooling of the remaining liquid. One …
It should be clear by now that heat plays an important role in drying. Delivery of heat to a drying system is critical and can be accomplished in a number of ways. Today’s blog will explore two options for heat delivery – conduction and radiation. Conduction seems to be the “go to” when it comes …
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