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Spillback Nozzle Lances

Atomization without compressed air

Lechler spillback nozzles atomize liquids as a fine hollow cone. The atomized flow rate can be distributed over cluster heads with up to six small nozzles. This results in a total spray angle of approximately 120°. This wide distribution of liquid over the entire duct is advantageous for reducing the number of lances.

Technical data (pdf, 2 MB)
Contact
Lechler GmbH, Metzingen
Fon +49 7123 962-0
Fax +49 7123 962-301
info(at)lechler.de

Properties

Spray angle of the individual nozzles
Spray angle of the individual nozzles 90° or 60° as hollow cone
High turn-down ratio
High turn-down ratio up to 12:1
Low operating costs
Low operating costs as no atomizing air required
Even and fine liquid atomization
Even and fine liquid atomization over the entire control range
Execution
Execution as single or cluster nozzle lances possible
Typical pressure range
Typical pressure range of 35 bar, g in the supply line at the nozzle

This special single-fluid nozzle works according to the pressure atomization principle. The water is sent to the nozzle with a relatively constant feed pressure, independent of the atomized flow rate.

The amount of liquid injected is adjusted via a control valve in the spillback line, whereby part of the flow is taken from the inlet flow rate and returned to the tank. The maximum atomized flow rate is achieved with the control valve closed. Uniform and fine liquid atomization is achieved across the entire control range.

Use

  • „„Gas cooling in medium-sized and large gas cooling towers
  • Gas cooling in clinker cooler

Application areas

Evaporative and chlorine-bypass cooler

Gas cooling in evaporative cooler

Clinker cooler

Gas cooling in clinker cooler

Dry desulphurization

DeSOx in ZWS reactor

Functionality of Spillback Nozzle Lances

The atomized flow rate can be distributed over cluster heads with up to six small nozzles. This results in a total spray angle of approximately 120°. This wide distribution of liquid over the entire duct is advantageous for reducing the number of lances.

Our nozzle lances are customer-specific designs, which are manufactured on a project-related basis taking into account the local and process-related conditions. This ensures that the spray is optimally placed and aligned in the flue gas duct.

The nozzles themselves have a low-maintenance design and can be quickly cleaned or exchanged with minimal effort.

Lechler 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, with barrier air as an option.
  • „Guide rail to facilitate lance installation
  • Wedge flange, standard flange and 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