VarioJet Nozzle Lances
Twin-fluid nozzles with low air consumption despite large outlet angle
Lechler VarioJet nozzles atomize according to the principle of internal mixing. With this twin-fluid nozzle, the water is fed in axially via a bore hole. The liquid is split up into a thin liquid film. This thin liquid film is split into finest droplets by the atomizing air in the mixing chamber. The resulting two-phase mixture is then atomized a second time when exiting via several bore holes arranged in a circular fashion.
Properties
Thanks to the innovative design of the nozzle, a spray with a large outlet angle is achieved. This is characterized by an even liquid distribution as well as a fine droplet spectrum with a low specific air consumption. The large free cross-sections in the nozzle keep the risk of clogging and the maintenance effort to a minimum.
The fineness of the droplet spectrum is decisively influenced by the air/liquid ratio and by the pressure level of the two flow rates. As a general rule: the higher the air/ liquid ratio and the higher the pressure level of atomizing air and liquid is, the finer the droplet spectrum.
Use
- Gas cooling in gas cooling towers
- Gas cooling in gas-bearing pipes (ducts)
- Injection of ammonia water for DeNOx processes (SNCR/SCR)
Application areas
Functionality of VarioJet Nozzle Lances
Nozzle lances ensure optimal spray placement and alignment in flue gas ducts. The consideration of local conditions and process-related matters means they can be individually adapted to the respective requirements.
The robust, high-quality stainless steel construction ensures a high degree of functional reliability. Lances are avialable in a variety of material to suit specific process requirements.
The nozzles themselves have a low-maintenance design and can be quickly cleaned or exchanged with minimal effort.
Nozzle lances are available with many options,including but not limited to:
- Protection tube to increase the service life in case of higher temperatures, high dust loads and aggressive gases
- Expansion joint or stuffing box for expansion compensation at high temperatures
- Wedge flange, standard flange or special flange
- Shifting device to change the insertion lenght
- Pre-assembled accessory kits for process media connections
- Further special customizations including wear protection, insulation, water cooling or coating