04
2019
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05
Selection, Installation, and Application of Spiral Nozzles in Desulfurization and Dust Removal
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Selection, Installation, and Application of Spiral Nozzles in Desulfurization and Dust Removal
The fundamental principle underlying the application of spiral nozzles in desulfurization and dust removal is: Spiral nozzle It is a composite spray nozzle that produces a spray pattern forming an annular or circular coverage area. By leveraging the fine droplets generated under high-pressure atomization—whose particle size is extremely small and whose surface tension is virtually negligible—the spray rapidly captures airborne dust particles of various sizes, binding them with water mist to increase their mass and density. This facilitates the separation of particulate matter from the atmosphere, effectively controlling dust emissions. In different desulfurization processes, the type of nozzle selected varies accordingly. In dry‑process desulfurization, where the material conveyed is desulfurization powder, air‑assisted nozzles are typically employed. In semi‑dry desulfurization, which handles limestone slurry with relatively high concentration and viscosity, air‑assisted nozzles are also commonly used. Research indicates that the gas‑to‑liquid mass ratio and the slurry concentration are the primary factors influencing the average droplet size; as the gas‑to‑liquid mass ratio increases, the average droplet size… SMD Decreases, concentration increases, SMD Increase. In wet flue gas desulfurization processes, spiral nozzles are typically used for desulfurization scrubbing, flue gas washing in towers, and cleaning of demister blades. Taking into account energy consumption and nozzle friction, pressure‑type spirals are often employed ( LX ) Nozzle. It is particularly effective for dust suppression in large, open‑air applications.
Applications of spiral nozzles:
● Flue gas desulfurization ● Gas cooling ● Evaporative cooling ● Washing and Rinsing ● Dust removal ● Fire prevention and firefighting
Selection and Application of Desulfurization and Dust-Removal Nozzles:
Coal mining and cement industries ： In coal washing and coal preparation, narrow-angle nozzles are preferred for desulfurization and dust removal, while cement plants opt to use… SNCR Denitrification spray gun;
Dust removal, smoke elimination, and exhaust gas treatment: For the purification of industrial flue gases and exhaust emissions, high‑flow desulfurization and denitrification nozzles can be selected.
Thermal Power Plant: Select high‑flow silicon carbide spiral nozzles for desulfurization and dust removal; these nozzles can also be used in the boiler’s pre‑combustion cooling system to lower the furnace temperature. ；
Waste management: Use atomizing nozzles to spray fragrances and eliminate odors, and employ solid-cone nozzles to suppress dust and remove unpleasant smells.
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