Cotreatment device for ship tail gas pollutants

Abstract

The invention provides a cotreatment device for ship tail gas pollutants. The cotreatment device comprises an absorption tower and an ozone generator connected with the absorption tower, wherein an air source is connected with and arranged on the ozone generator; one end of the absorption tower is connected with a tail gas inlet; the other end of the absorption tower is connected with a tail gas outlet; a cooling layer and an absorption layer are arranged in the absorption tower along the moving direction of tail gas; and an ozone ejector is arranged between the cooling layer and the absorption layer. According to the invention, the ozone ejector is located in the absorption tower and between the cooling layer and a spiral-flow plate; ship tail gas with a high temperature enters the tail gas inlet located in the bottom of the absorption tower, and contacts with cooling water sprayed from the cooling layer, so decomposition of a large amount of ozone is avoided; the ship tail gas then passes through the absorption layer along the flowing direction of the tail gas, and nitrogen oxides and sulfur dioxide in the tail gas are absorbed by magnesium hydroxide; the ship tail gas passes through a second column tray to contact with seawater sprayed from a water washing layer, and the nitrogen oxides and sulfur dioxide are further washed and absorbed; and water mist is intercepted by a demister, so treated ship tail gas is finally discharged from the tail gas outlet located at the top of the absorption tower.

Description

technical field [0001] The invention belongs to the technical field of ship tail gas treatment, and in particular relates to a cooperative processing device for ship tail gas pollutants. Background technique [0002] The main pollutants in the tail gas emitted by ships are nitrogen oxides (NO x ) and sulfur oxides (SO x ). According to statistics from the International Maritime Organization (IMO), NO in ship exhaust around the world in 2012 x and SO x The emissions of China accounted for 15% and 13% of the total global emissions respectively, which brought serious air pollution. NO x Nitric oxide (NO) accounts for about 95% in the x More than 95% of it is sulfur dioxide (SO 2 ), so the key to the treatment of ship exhaust pollutants is to remove NO and SO 2 . [0003] In the amendments to Annex VI of the international MARPOL73 / 78 Convention, ship exhaust NO x The Tier III standard for emission limits requires new ships to be NO from January 1, 2016 x The upper lim...

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Problems solved by technology

[0006] In view of the above-mentioned deficiencies and defects of the prior art, the object of the present invention is to provide a cooperative treatment device for ship exhaust pollutants, which solves the problem of uneven mixing of ozone and exhaust gas in the prior art, and the easy decomposition of ozone after contact with high-temperature exhaust gas. technical problem

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