Marine exhaust gas SOx removal device for rotary spraying refluxing bubble tower

Abstract

The invention aims to provide a marine exhaust gas SOx removal device for a rotary spraying refluxing bubble tower. The marine exhaust gas SOx removal device comprises a washing tower, a NaOH solution storage cabin, a waste liquid buffer tank and waste liquid centrifugal treatment equipment; the washing tower comprises a washing tower outer layer cylinder; a washing tower inner layer cylinder and a spiral rising washing pipeline are arranged in the washing tower outer layer cylinder; an exhaust gas inlet, an exhaust gas outlet and a washing liquid outlet are respectively formed in the outer wall of the washing tower outer layer cylinder; the exhaust gas inlet is connected with a marine diesel engine exhaust pipe; the exhaust gas outlet is communicated with the atmosphere; the washing liquid outlet is communicated with the waste liquid buffer tank; the waste liquid buffer tank is connected with the waste liquid centrifugal treatment equipment; the waste liquid centrifugal treatment equipment is connected with each of an oil contamination storage cabin and a heavy residue storage cabin. According to the marine exhaust gas SOx removal device, SO2 in exhaust gas is subjected to washing treatment by adopting two technologies, namely a novel rotary spraying washing technology and a novel pneumatic stirring bubbling washing technology; the contact path between the washing liquid and the exhaust gas is increased; the acting time is prolonged; the acting area is increased, so that the exhaust gas is treated sufficiently.

Description

technical field [0001] The invention relates to a marine diesel engine, in particular to an exhaust gas treatment device of the marine diesel engine. Background technique [0002] Heavy fuel oil is a common fuel for marine diesel engines. The harmful component SOx (mainly SO2) in the exhaust gas affects the atmospheric environment and endangers people's health. To this end, the International Maritime Organization has formulated a series of anti-pollution conventions to strictly limit SOx emissions in ship exhaust. At the same time, countries are also actively developing ship exhaust SOx treatment devices to treat it. At present, wet desulfurization is still the most important control technology. [0003] The current ship exhaust desulfurization technologies mainly include gypsum flue gas desulfurization and seawater desulfurization, and the main washing methods are spray tower washing, packed bed washing, wet bath washing and other methods. However, there are various prob...

AI Technical Summary

Problems solved by technology

This device is equipped with a cooler before entering the bubble tower to reduce the temperature of the flue gas, which increases the energy consumption and cost of the equipment

At the same time, the flue gas is recycled by using the washing slurry, the fluidity of the flue gas in the slurry is not strong, and the gas holdup is not high, resulting in insufficient reaction effect

The formation of ship exhaust gas is more complicated, including oil pollution, heavy metal ions and particulate matter, etc. This cycle will cause equipment pollution and blockage, reduce treatment efficiency, and increase equipment maintenance costs

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