The KSD0 series was specially developed for atomizing urea solutions at low flow rates. Due to the principle of external mixing, these nozzles are much less inclined to crystallization of the urea.
A field test has already confirmed that the maintenance effort for KSD0 nozzles is significantly lower than for internally mixing nozzles. A slightly increased pressure drop on the water side (urea) can be reversed by flushing with pure water.
The nozzles must not be removed and can be cleaned during operation of the SNCR system. Regular rinsing with water loosens internal caking and prevents costly maintenance work.
The liquid is fed into the inner space of the KSD nozzle, swirls and emerges as a hollow cone. The atomizing medium is fed to the KSD nozzle and emerges through a defined ring gap. Immediately after leaving the KSD nozzle, the liquid is thoroughly mixed with the atomizing medium. The hollow cone is transformed into a full cone with a fine droplet spectrum.
The fineness of the droplet spectrum significantly depends on the atomizing medium/liquid ratio. The fineness of the droplet spectrum increases as the atomizing medium/liquid ratio increases.
Due to the principle of external mixing used in the KSD nozzle, liquid and atomizing medium do not influence each other when the upstream pressure changes. Since the media are mixed outside the KSD nozzle, this nozzle is also suitable for using steam as atomizing medium.
KSD nozzles have optimum emergency running properties in the event of failure of the atomizing medium, since the liquid is still atomized as a hollow cone in such cases. However, the droplet spectrum in this case is not as fine as when an atomizing medium is used.
Compared to the existing KSD1 series, the outer diameter of the KSD nozzles has been drastically reduced. The leaner design of the nozzle also enables cost savings in the design of the lance.
For operating the KSD nozzles with steam, a special lance design was developed. To prevent cooling or heating of the media, the cold liquid tube is isolated from the steam tube.
Our nozzle lances are project-related customized designs and are made individually to suit the local and process engineering conditions. They enable optimum positioning and alignment of the spray in the flue gas duct.
The nozzle lances are made of high-quality stainless steel and can be manufactured from chemical-resistant and high-temperature-resistant materials according to the respective process-specific requirements.
Optional equipment for the nozzle lances include the following: