Spray nozzle for producing a urea-sulfur fertilizer
Assigneesthyssenkrupp Fertilizer Technology GmbH, thyssenkrupp AG
InventorsMatthias Potthoff, Harald Franzrahe, Thomas Johner, Luc Albert Vanmarcke
Life of this patent
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Abstract
A spray nozzle for production of urea fertilizer granules and/or urea-sulfur fertilizer granules has a conveying channel and an atomizing gas channel. The conveying channel has at least one separating pin and the atomizing channel has at least one swirl element. The swirl element has inserts, cutouts and moving and fixed elements. The disclosure also sets out a fluidized bed granulator with a spray nozzle for production of a urea-sulfur fertilizer, a process for producing a urea-sulfur fertilizer, and the use of the spray nozzle for production of fertilizer granules.
Claims18
A spray nozzle for production of urea fertilizer granules and/or urea-sulfur fertilizer granules, the nozzle comprising:
- a conveying channel capable of conveying a melt, and
- an atomizing gas channel capable of conveying a gas,
- the conveying channel comprising a first separating pin and a second separating pin, the first and second separating pins comprising cylindrical elements disposed in a crossed arrangement, the first and second separating pins enabling separation and subsequent mixing of the melt,
- the atomizing channel comprising a swirl element,
- wherein the swirl element comprises inserts, cutouts, and moving and fixed elements, and
- wherein the conveying channel and the atomizing gas channel are planar to one another and form a common exit opening.
A process for producing a urea-sulfur fertilizer, comprising:
- providing a melt containing urea and elemental sulfur;
- spraying the melt and atomizing gas into a fluidized bed granulator with a spray nozzle;
- and
- obtaining granules in the fluidized bed granulator;
- wherein the spray nozzle comprises a conveying channel and an atomizing gas channel,
- wherein the conveying channel comprises first and second separating pins arranged in a crossed arrangement and the atomizing channel comprises a swirl element, and
- wherein the melt is introduced via the conveying channel at a pressure of about 0.5 bar to 7 bar.
Dependencies are inferred from the claim text.