跳至主要内容

Why are emulsion defoamers layered?

In many production processes, problem caused by harmful foams. The presence of these foams reduces the utilization rate of equipment, causes production losses, pollutes the environment, and even affects the normal operation of operations.

To eliminate harmful foam, you can use standing, decompression (vacuum), heating or pressurization, chemical defoaming, etc. But when you need to quickly and effectively eliminate foam in a short time, you need to use chemical defoaming. Chemical defoaming does not require a lot of equipment investment and does not need to change the original process. It is the most convenient way of operation.emulsion defoamers

 

Why are emulsion defoamers layered?

Emulsion-type defoamers will delaminate if they are not used for a long time. After delamination, defoamers will affect their use.

Why do they delaminate? What are the causes?

Emulsion defoamers are physically emulsions and are thermodynamically unstable systems. Layering may occur after long-term storage, but use after stirring does not affect product effectiveness. Another layering phenomenon may be deterioration and layering. This is because the bacteria act on the emulsion. If it is not very serious, this product can also be used as long as it is added with a strong fungicide to kill the internal bacteria and return to the normal state. Run out as soon as possible. There is also a delamination phenomenon because the defoamer is diluted with water, destroying the original structure of the defoamer, resulting in poor stability of the defoamer, breaking the viscosity system of the defoamer itself, and causing delamination of the defoamer. Whether the defoamer is easy to layer is also an important indicator to measure the quality of the defoamer.

https://www.linkedin.com/company/china-defoamer

https://invelydefoamer.blogspot.com/

https://www.facebook.com/invelychem/

 

评论

此博客中的热门博文

Defoamer Test Method

Defoamer testing methods are divided into dynamic defoaming and static defoaming tests. If your foaming environment is different, the recommended test methods are different. There are three main types of foam experiments to characterize the activity of defoamers. Persistence. As we have different experimental conditions in different laboratories and the experiments used in our research to obtain results from existing literature, we will introduce these experiments below. Other methods are sometimes used depending on the particular application. 1. Ross-Miles Foam Tester   Features: Tested for strong foaming environments. This experiment is widely used for characterization        (1) Foaming of surfactant solution        (2) Research and application of foam stability in the presence of defoamer In the foaming system, the defoaming performance test was carried out by circulating bubbling by a Ros...

How to control foam and defoaming in the papermaking ?

Foam is always a thorny issue in the pulp&paper industry. Foaming reasons   Once liquid which contain a surfactant or this kind of liquid having a large viscosity is agitated, a large amount of foam which is not easily disappeared is often produced. The reasons why these bubbles are more stable and not easy to disappear are as follows: n   Film elasticity The ability of the liquid film to resist local thinning during the general thinning process is film elasticity. When the liquid film has a thin point, this point is a possible breakage. However, when this is further stretched, the surfactant molecules in this part will be more reduced, and the increase in surface tension will result in a force imbalance, and the surrounding surface will be moved toward a thin point to balance the surface. tension. The movement of the surface layer pulls the liquid of the lower layer together, thus preventing further thinning of the initial weakness and, in turn, foam ruptu...

Why is there bubble in sewage treatment? What are the hazards of these bubbles? How to eliminate these bubbles?

Why is there bubble in sewage treatment? What are the hazards of these bubbles? How to eliminate these bubbles? In the process of sewage treatment, I believe that everyone often encounters a large amount of foam in the biochemical pool, and if it is at rest, it will overflow from the pool, causing serious pollution of the external pool wall of the external equipment, which will deteriorate the operating conditions. Affected  the surrounding environment Type of foam in sewage treatment 1.    Initial bubble In the initial stage of aeration tank start, the sludge in the aeration tank is not suitable for the water quality of the sewage, and is not suitable for the growth environment, and foam is easily formed. As the sludge adapts to water quality, the foam will decrease. At the beginning of the aeration tank start-up, the sludge is relatively small, the sludge load is high, and foam is easily generated. After the amount of sludge increases, the foam will gradua...