ホール型電気集塵装置によるディーゼル排ガス中の微粒子除去

抄録

Various PMs are emitted from marine diesel exhaust gas. Since re-entrainment phenomena occur in the conventional ESP, the hole-type ESP was newly developed to overcome re-entrainment in ESPs. The hole-type ESP utilizes the ionic wind, which is generated by a corona discharge. The ionic wind guides particles into the hole. The electric field of a collecting zone in the hole is zero, meaning that re-entrainment may be expected to be suppressed. In our studies, the upstream and downstream particle concentrations were measured to determine their collection efficiency. The highest collection efficiency for small particles was achieved with 22.6% of the aperture rate. In the conventional ESP, a re-entrainment phenomenon occurred when the primary flow velocity increased. However, re-entrainment was suppressed in the hole-type ESP under the same conditions.