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Clog-free Atomizing and Spray Drying Nozzle

Lawrence Berkeley National Laboratory

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Head-on view of the atomizing nozzle.
Head-on view of the atomizing nozzle.

Top view of the Berkeley Lab atomizing spray nozzle
Top view of the Berkeley Lab atomizing spray nozzle

Technology Marketing SummaryDuo Wang and Mark Modera have designed an atomizing nozzle that eliminates clogging. The Berkeley Lab nozzle uses the high velocity gas efflux to create a layer of ambient temperature air around the tube containing the liquid to be atomized. This feature minimizes heat transfer from the gas to the liquid, thus eliminating premature drying. Several other design features also help to eliminate clogs.DescriptionThe Berkeley Lab nozzle can be fed with heated gas for spray drying or unheated gas for just atomization and can be constructed from standard tube fittings. Hand-tightened installation of the liquid tube makes servicing easy. In addition, the design has been shown to reduce energy use by 80 percent for some applications.
  • Eliminates clogging
  • Combines atomizing and spray drying functions
  • Can be made from standard tube fittings
  • Easily serviced
  • Energy efficient
  • Provides high quality atomization
  • Dries spray without altering the spray pattern
Applications and Industries
  • Product dehydration, i.e. converting liquids like milk, drugs, and chemicals, into powders
  • Drying waste streams
  • Atomizing liquids
More InformationFor more information on this technology see:
Patents and Patent Applications
ID Number
Title and Abstract
Primary Lab
Patent 7,156,320
Method and apparatus for duct sealing using a clog-resistant insertable injector
A clog-resistant injector spray nozzle allows relatively unobtrusive insertion through a small access aperture into existing ductwork in occupied buildings for atomized particulate sealing of a ductwork. The spray nozzle comprises an easily cleaned and easily replaced straight liquid tube whose liquid contents are principally propelled by a heated propellant gas, such as heated air. Heat transfer is minimized from the heated propellant gas to the liquid tube until they both exit the injector, thereby greatly reducing the likelihood of nozzle clogging. A method of duct sealing using particles driven by heated propellant gas is described, whereby duct-sealing operations become both faster, and commercially practicable in inhabited commercial and residential buildings.
Lawrence Berkeley National Laboratory 01/02/2007
Technology Status
Technology IDDevelopment StageAvailabilityPublishedLast Updated
IB-1778 LicensedAvailable - Available for licensing in fields of use other than sealing HVAC systems06/15/201006/24/2010

Contact LBL About This Technology

To: Shanshan Li<>