| Sulfur oxides emissions from ships have been widespread concerned in recent years. Marine Environmental Protection Committee approved using low sulfur fuel oil or an approved emission reduction technology. The former is expensive, so research on ship SOx emission control technology become a hotspot.According to research on industrial application of desulphurization technology, this lab has proposed a novel method of magnesium-based seawater desulfurization. The wastewater from desulfurization contains unburned fuel, which leads to water and soil pollution, and it is harmful to human healh. Meanwhile, relevant provisions of ship wastewater set the oil emission limits. Analyzing PAHs and oil in the desulfurization wastewater, it is shown that the oil content is greater than the emission limit..So,it is necessary to reduce the oil content in the wastewater.Due to the space limit on board, the device for reducing oil content in wastewater should be efficient, convenient, and small occupied area. According to research on oily wastewater treatment, the adsorption method is chosed.Firstly, the six kinds of adsorption materials including activated carbon, fly ash, bentonite, absorbent cotton, ceramic filter and macroporous resin have been test to reduce the oil content in the wastewater. The result shows that the macroporous resin has the best removal effect.Secondly, the experiments on static adsorption and dynamic adsorption of macroporous resin have been conducted using simulated oily wastewater. Then, the experiment data were fitting with isotherm.Finally, the effects of fitting quantity of macroporous resin and flow rate on the oil removal efficiency have been studied. As the result, the designed adsorption device with the height of 1.5m and the diameter of 1.2m can work 188h continuously while the flow rate is 5.4m3/h. |
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