多孔孔板水力空化灭活船舶压载水中微藻的研究

Research on Inactivation of Microalgae in Ship’s Ballast Water by Multi-hole Orifice Plate in Hydraulic Cavitation

利用自制的水力空化装置来研究多孔孔板的孔径和开孔个数对异弯藻灭活率、装置能耗及单位能耗所灭活异弯藻个数的影响。结果表明,对于多孔孔板,在孔数恒定时,随着孔径的增大,异弯藻灭活效果会降低。另一方面,随着孔径的增大,装置的能耗减小,但是单位能耗所灭活的异弯藻的个数却增加,提高了装置的能量利用率。此外,当孔板的开孔率一定时,随着开孔个数的增加,异弯藻的灭活率会降低。开孔个数的增大也会降低水力空化装置的能耗,从而使单位能耗所灭活的异弯藻的个数增加,同样也提高了装置的能量利用率。

The thesis takes advantage of the self-made hydrodynamic cavitation device to study the impact of the number of holes and the aperture on Heterosigma akashiwo inactivation rate, energy consumption and the number of Heterosigma akashiwo inactivated by per-unit energy consumption. When the number of holes is unchanged, the it shows that with the increasing of the aperture the Heterosigma akashiwo inactivating effect will be redticed, on the other band, wiih the the increasing of the aperture, the energy consumption of the apparatus is reduced. But there is an increase on the number of tteterosigma akashiwo inactivated by per-unit energy consumption, in this way, the energy utilization of the apparatus has improved. When the opening ratio of the orifice plate is fixed, the restdts also show that Heterosigma akashiwo inactivation rate will be reduced with the number of holes increase, but the increase of the numberof holes has reduced the energy consumption, so the number of Heterosigma akashiwo inactivated by per-unit energy consumption has increased, and the energy utilization of the apparatus has also improved.