Ship desulfurization and denitrification integrated process and ship desulfurization and denitrification integrated device

Abstract

The invention discloses a ship desulfurization and denitrification integrated process. A whole system mainly comprises a desulfurizing absorption tower 10, a denitrification drying and oxidation tower20, a denitrification spray tower 30 and a drying liquid regeneration tower 40. The ship desulfurization and denitrification integrated process is simple in technological process and operation, smallin land occupation, low in cost and energy consumption and high in desulfurization and denitrification efficiency; the concentration of SO2 in the discharged clean flue gas is not higher than 30mg / m<3>, and the concentration of NOX in the discharged clean flue gas is not higher than 50mg / m<3>, so that the discharged clean flue gas meets the national standards; therefore, the ship desulfurizationand denitrification integrated process can be widely applied to desulfurization and denitrification of flue gas of ships.

Description

Technical field [0001] The invention relates to an integrated ship desulfurization and denitrification process, which is applied to a wet flue gas desulfurization and denitrification system, and belongs to the technical field of ship flue gas desulfurization and denitration treatment. Background technique [0002] Sulfur Dioxide (SO 2 ) And nitrogen oxides (NO X ) Is one of the main sources of air pollution. The resulting environmental pollution, especially acid rain and haze, is very serious, causing serious economic losses. At the same time, environmental pollution is always threatening people's health. Therefore, increasing the treatment of sulfur dioxide and nitrogen oxides has no time to wait. [0003] As for ship exhaust gas, theoretically estimated that a large low-speed diesel engine with a power of 10,000 kW emits combustion products into the atmosphere every year for 6000 hours. NOx alone can reach more than 1,000 tons per year, and other combustion products (such as SO...

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Problems solved by technology

[0002] Sulfur dioxide (SO 2 ) and nitrogen oxides (NO X ) is one of the main sources of air pollution, the resulting environmental pollution, especially acid rain, smog is very serious, causing serious economic losses

However, it is currently used for ship exhaust treatment, and there are mainly the following problems: (1) The smoke temperature of ships is low, around 200 degrees, which cannot meet the requirements of SCR catalysts; (2) Ships generally use heavy oil, and the flue gas contains a lot of tar and SO 2 , the anti-poison ability of SCR catalyst is not enough; (3) SCR system generally occupies a large area, which is not suitable for ship surface

The traditional wet desulfurization technology is mainly based on limestone-gypsum wet desulfurization. This process is applied to ship tail gas treatment, and there are several problems as follows: (1) The reactants and desulfurization products are solid, which will occupy a large amount of cargo space of the ship; (2) The desulfurization process is complicated, the equipment is huge, and the area is large, which is not suitable for the space of the ship

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