Key outcomes:

  • Identification of potential issues
  • System insight
  • Design optimization

Figure 1: The velocity distribution and motion of particles within a ductwork system. In this example significant deposition is observed for the larger particles due to a large recicrculation zone and an increase in duct diameter.

Many industrial processes result in particulate matter that is transported through ductwork to a particle collection system. This includes smelters, incineration plants, manufacturing and mineral processing facilities. Flue deposition can lead to a build-up of material and negatively impact the flow, requiring costly maintenance shutdowns and exposing maintenance staff to high levels of particulate. Deposition typically occurs in dead zones with low velocity and is affected by the particle material, particle size, gas flow rate and duct geometry.

Flue deposition issues can be solved by removing stagnant regions and achieving a uniform pipe flow by redesigning the pipe.

Using advanced Computational Fluid Dynamics (CFD) techniques Synergetics engineers perform investigations of flue deposition within ducting systems and pipes. The result can be used to identify low-velocity regions and whether they are contributing to the build-up of particles. Understanding the flow situation enables the design and verification of solutions to minimise dead zones and improve system performance.

particles in a duct, coloured by velocity magnitude

Figure 2: Particles within the duct coloured by velocity magnitude. The particles maintain significant momentum into the bend, before rebounding off the duct wall.