Comprehensive Engineering Design Parameters for Fog Cannon Systems for Wastewater Evaporation for desalination reject water
1. Hydraulic Design Parameters
Parameter Engineering Detail
Design Flow Rate (Q) Defined based on the volumetric evaporation requirement (typically 5–40 m³/h per unit). Flowrate directly influences the droplet residence time and evaporation capacity.
Operating Pressure (P) Nozzle atomization requires discharge pressures between 20–60 bar depending on droplet size target. Higher pressures yield finer droplets, increasing specific surface area for rapid evaporation but increase pump energy consumption. See more https://watermanaustralia.com/comprehensive-engineering-design-parameters-for-fog-cannon-systems-for-wastewater-evaporation-in-mining-industry/.
Nozzle Hydraulic Loading Each nozzle is designed for uniform distribution of flow to avoid non-uniform spray patterns. Nozzle count, arrangement, and orifice diameter are determined based on total system flow capacity and spray angle coverage.
Water Quality Tolerance To prevent nozzle erosion or clogging, pre-filtration ensures a maximum particulate size ≤ 100 µm. Chemical compatibility with brine, scaling ions (e.g., Ca²⁺, Mg²⁺), and minor hydrocarbons is considered.
2. Droplet Dynamics & Spray Design
Parameter Engineering Detail
Droplet Size Distribution (DSD) Atomized droplets target a 30–100 micron Sauter Mean Diameter (SMD) to optimize evaporation rate by maximizing the surface-to-volume ratio while minimizing fall-out risk. CFD simulations (Computational Fluid Dynamics) are employed to optimize droplet trajectory and dispersion under variable wind conditions.

Spray Cone Angle Adjustable or fixed between 30°–60°, depending on site evaporation pond size or designated evaporation area to ensure coverage without overspray beyond containment boundaries.
Throw Distance Required to project atomized droplets across an operational range of 30 to 100 meters, determined by fan capacity and nozzle arrangement. Computational analysis is conducted to prevent salt fallout outside permitted zones.