What is Side Stream Filtration?
A cooling tower that is clean is an efficient cooling tower. Side stream filtration operates in a different manner than other water treatment methods. Rather than treating used water after it has exited the cooling tower, a side stream filtration unit will function as an add-on to your cooling tower, continuously filtering a portion of the tower's water during normal operations.
Side stream filtration units can remove suspended solids, organic material, and silt particles through continuous filtration, reducing the risk of fouling and biological growth. This enables plant managers to more effectively manage common cooling tower issues such as scaling and corrosion. You also save water and energy because you don't have to discharge as much water from the cooling tower and your heat transfer surfaces aren't clogged with scale.
How does high-efficiency side stream filtration work?
High-efficiency side stream filtration is critical for optimizing the cooling tower water treatment process. You can filter out fine particulate in your cooling tower's water supply using high-efficiency side stream filtration equipment, which is the underlying cause of many cooling tower problems. These ultra-fine particles can clog your cooling tower, disrupt heat exchange, reduce the efficacy of chemical treatments, and promote biological growth.
Particles: Fine vs. Ultra-Fine
While side stream filtration units are essential for improving cooling tower water treatment, you must select the right one. Some side stream filtration units frequently leave ultra-fine particles in the water, which are the root cause of a variety of cooling tower problems.
Because water particles become more concentrated during cooling tower operations, ultra-fine particulate is somewhat unique to cooling towers.
To understand how fine particles can cause the previously mentioned problems, it's important to understand that all of these issues compound and aggravate one another.
Ultra-fine particulate is a significant contributor to fouling and biofilm formation, which leads to increased corrosion in your tower.Corrosion then deteriorates your equipment, resulting in additional scaling and even more heat transfer inefficiencies. If ultra-fine particulates are not addressed from the start, they can interfere with biocides and other valuable chemicals, making cooling tower water treatment an unnecessarily difficult burden.
Sometimes design engineers will try to solve these problems by using bag filters or cartridge filters, but this is not a good option. Because you're dealing with wet operations, these filters will quickly become too expensive and inefficient.
Side stream filtration equipment, on the other hand, employs layers of granulated sand to trap ultra-fine particles and other contaminants as the water flows through the sand layers.
Sand filters with high efficiency can remove particles as small as 0.45 microns.
Because cooling towers require a large amount of air to promote evaporative cooling methods, particles in the air are also an issue, leading to additional water contamination. The majority of the particles in the air are between 0.5-2 microns in size.
This is frequently true of cooling tower water. A typical particle analysis reveals that more than 90% of the contaminants in your cooling tower water are in the 0.5-2 micron range.
While any side stream unit is beneficial, only high-efficiency sand filters will remove the small particles that can cause cooling tower systems to fail. Another advantage of high-efficiency side stream filtration is:
· Water and energy consumption are being reduced.
· Chemical usage is being reduced.
· Reduced maintenance costs.
· Productivity gains and reduced downtime.
· Improved biological growth control.
Before installing any type of side stream filtration unit, always perform a particle analysis of your water's contaminants. In order to specify the proper type of side stream filter, you must first fully understand your particle removal requirements.
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