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A mathematical model has been created and utilized to predict the collection performance of the electrostatic water spraying scrubber concerning the diesel particulate matter (DPM). The model is based on a mass and momentum balance. It takes into account the gas dynamic, charge to mass ratio, water droplet size, DPM size and the electric fields. The effects of the operating parameters, such as gas flow rate, water flow rate and applied voltage, on DPM collection efficiency within the scrubber, were also investigated. In an electrostatic water spraying scrubber, the electrostatic force is the main mechanism for DPM collection. This is because of the strong attraction force, and the short collection time. The DPM collection by electrostatic increases with an increasing charge to both DPM and droplet. In the experimental section, the concentration of particles, and their size distribution, in both inlet and outlet exhaust gases, and of the studied scrubber, have been measured directly for the validation of the predicted DPM collection efficiency. Numerical results were in good agreement with the experimental data obtained in the laboratory.

Prediction for Diesel Particulate Matter (DPM) Collection Efficiency of Electrostatic Water Spraying Scrubber