A spray tower simultaneously removes ship exhaust no x and so 2 Methods

Abstract

The invention relates to a device and method for simultaneously removing ship tail gas NOx and SO2 through a novel spray tower. By using sea water as a solvent, activator and desulfurization absorbent, NO gas in NOx gas is finally removed in the form of N2 through a technology combining a sodium persulfate advanced oxidation method and a urea reduction method, thereby realizing desulfurization and denitrification integrated treatment of the ship tail gas; and by utilizing waste heat from the flue gas, the activation of reaction reagents and the concentration and refining of a waste liquid are performed. According to the invention, a desulfurization / denitrification reactor using the novel spray washing tower 11 with a small-hole gas distribution plate 12 as a main body is used, the average amplitudes of the velocity gradient and the pressure produced by the flowing of a fluid in the novel spray washing tower 11 are increased, the shearing force field is stronger, and the pulse is more violent, thereby being more beneficial to internal turbulent mixing. The small-hole gas distribution plate 12 can effectively strengthen gas-liquid contact in an impinging stream reaction region 24, so that escaping liquid drops of reagents are effectively collected for utilization, thereby improving the whole reaction effect and the utilization ratio of the treatment reagents.

Description

technical field [0001] The invention belongs to the technical field of waste gas treatment of marine diesel engines, and in particular relates to a spray tower for simultaneously removing NOx and SO from ship tail gas 2 devices and methods. Background technique [0002] The burning of heavy oil during the voyage of the ship will produce a large amount of harmful gases. The harmful gas components are NOx (mainly NO) and SOx (mainly SO 2 ) can cause acid rain and photochemical smog, endangering human health and the environment. To this end, the International Maritime Organization has formulated a series of anti-pollution conventions to strictly limit the emission of harmful components in ship exhaust. At the same time, countries are also actively developing ship exhaust treatment devices to treat NOx and SOx in the exhaust. [0003] With the increasingly stringent regulations, combined desulfurization and denitrification technology is imperative. However, the current joint...

AI Technical Summary

Problems solved by technology

The device and method described in this patent increase the equipment investment for tail gas treatment, and the ozone needs to be limited. The addition of an ozone generating device not only increases the equipment investment, but also increases the floor area and reduces the effective space of the ship.

Moreover, the components of the final product processed by this method are relatively complex, and need to be recovered through a post-processing unit, and a corresponding collection unit is also installed on the ship, which also increases the footprint of the ship's exhaust control device

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