Meaning
Physical mechanism involves the capture and transport of carbonaceous soot particles within a surrounding fluid flow. Within high temperature reactors, soot entrainment influences the purity of the synthetic materials being produced. The velocity and viscosity of the gas determine the size and concentration of the particles that remain suspended.
Effective control of this process prevents the accumulation of carbon deposits on the reactor walls.
Particle Dynamics
Forces acting on the individual soot flakes include drag, gravity, thermophoresis, and lift. When the gas velocity is high enough, the drag force overcomes the gravitational pull, keeping the particles in the stream. This movement facilitates soot entrainment until the material reaches the filtration system where it can be removed or collected.
Contamination Control
Quality of the final product depends on the successful separation of soot from the desired chemical species. If the soot entrainment is not managed, carbon particles may become embedded in the ceramic or metal powders. This leads to changes in the thermal and electrical properties of the material.
Advanced scrubber systems are designed to maximize the capture efficiency of these entrained particles.
System Maintenance
Accumulation of carbon within the exhaust ducting can lead to restricted flow and increased pressure. Regularly monitoring the levels of soot entrainment helps in scheduling cleaning intervals for the plant. If the concentration exceeds safety limits, the risk of a dust explosion or a fire increases.
Computational fluid dynamics models are used to predict the regions of high particle concentration. These models assist in the placement of sensors and the design of better geometry for the exhaust system. This proactive approach reduces the downtime associated with unexpected blockages or component failures.
