Foam Control Nozzles

Liquids that are in constant agitation while moving through intake/outtake lines or gathered in storage or processing vessels can mix with the present air or gasses in the environment. This mixing causes the gas or air to become trapped which leads to the creation of foam. Foam can be highly undesirable for processes and cause a range of issues for both workers and production lines. To rectify this issue, spray nozzles for foam control applications above or along tanks and other vessels can break apart the foam bubbles.


Benefits of Foam Control Spray Nozzles

Due to the foam bubbles being varying sizes, spray nozzles can be placed strategically to apply water or foam control agents across the entire surface of the processed liquids. The spray nozzles can provide the appropriate droplet sizes to break apart the bubbles without being too large where they end up making more foam across the liquid's surface.

Foam spray nozzles with anti-clogging properties also allows companies to reuse the foam control liquid repeatedly. To cut down on material costs and wastes, most often foam control liquids are recirculated and used repeatedly during processes. However, these recirculated fluids can pick up particulates from processes. Lechler spray nozzles for foam control applications addresses and minimizes clogging for reused foam control liquids.

Common Applications for Foam Spray Nozzles

Applications for foam spray nozzles will depend on the industry and application. Common industries who rely on spray nozzles include food processing, wastewater treatment, water treatment, chemical processing, and other industrial processes.

Foam spray nozzles can be placed over mixing vessels, weirs, spillways, launders, aerobic digester tanks. anaerobic digesters, and seawater intakes. They can address foam creation along any pool vessel reservoir, or vessel where the liquid instead is still or going through constant agitation.

Types of Spray Nozzles for Foam Control

Foam spray nozzle design needs to address the type of liquid pressure that is present during intake and the pressure drop along the nozzle to create the right droplet sizes for foam control. Three types of nozzles used for foam control include flat fan, hollow cone, and full cone.

Flat fan nozzles have a deflected design to offer a fan style spray pattern. This spray pattern offers wide coverage for every nozzle while also featuring clog resistance. It provides a wide range of droplet sizes that have high impact. They can also handle varying flow rates.

Hollow cone nozzles provide a hollow ring style spray pattern with an even distribution of droplets no matter the flow rate or pressure. They produce small to medium-sized droplets when dispersing foam bubbles. The nozzles allow the foam control agents to flow without being impeded by particulates, allowing for clog-free operation.

Full cone foam control nozzles also offer clog resistance and full coverage over the foam area. The nozzles can remove buildup under various working conditions and can handle recirculated foam control fluids that have particulates. Applied liquids pass freely through the full cone nozzle to maximize operation.


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Flat Fan Nozzles

Lechler flat fan nozzles stand for high impact and uniform liquid distribution with spray angles up to 60°. Flat fan nozzles with low flow rates are especially suited for humidifying and spraying in general. The flow geometry of the nozzle allows the production of accurate, compact sprays, available with different distribution patterns.

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Hollow Cone Nozzles

A hollow cone spray nozzle produces the smallest droplet size of any purely hydraulic nozzle. The spiral grooves in the swirl inserts of these nozzles ensure an efficient whirling of the liquid which creates uniform droplets throughout. Tangential hollow cone nozzles contain no inserts and the liquid flows at a right angle, which then creates a whirling rotation inside the nozzle chamber. These nozzles are less prone to clogging.

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Full Cone Nozzles

Full cone nozzles spray completely within the interior of a circular area.  There are two different styles of full cone nozzles:  Axial and Tangential. Axial full cone nozzles achieve a uniform distribution of liquid over a circular area. Tangential full cone nozzles have no internal vanes so they are less prone to clogging.

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