Efficient washing-desulfuration-dust removing process equipment for exhaust gas of marine diesel engine

Abstract

The invention discloses efficient washing-desulfuration-dust removing process equipment for exhaust gas of a marine diesel engine, and belongs to the field of marine exhaust gas emission pollution control. According to the technical scheme, the exhaust gas and a spraying desulfuration sodium alkali solution are sufficiently mixed for contact, and the obtained mixture reacts with a sulfur oxide to generate sodium sulfate; a displacement reaction between sodium sulfate and lime slurry is completed in a displacer, and the generated sodium alkali is sent into a desulfuration and dust removing washing kettle for recycling; the generated calcium sulfate is sent into a reject bin; dust particles in the exhaust gas are attached to a washing solution, the attached dust particles are separated out, and then the separated dust particles are also sent into the reject bin. The equipment provided by the invention mainly comprises the washing kettle, a heat exchanger, a desulfuration solution treatment device, the displacer, a separation device, an alkali solution tank, the reject bin, a fan, spraying liquid pumps, an electrically operated valve and the like. The equipment has the advantages that according to the sulfur oxide content, temperature, pressure and other information provided by a sensor, the electrically operated valve can be controlled to adjust the spraying liquid flux, granularity and distribution situation in the washing kettle, sufficient gas-liquid mixing for contact can be finished, efficient desulfuration and dust removing can be achieved, and the marine exhaust gas emission requirements can be met.

Description

technical field [0001] The invention discloses a high-efficiency washing, desulfurization and dust removal process equipment for marine diesel engine exhaust gas, which belongs to the fields of air pollution control and marine ship exhaust gas emission control. After heat exchange and cooling, the marine diesel engine exhaust gas enters the washing tank and is fully mixed and contacted with the spray desulfurization alkaline washing liquid, and dissolves and absorbs the sulfur oxides in it through neutralization reaction to form sulfate. The dust and other particles in the exhaust gas are also attached and mixed by the washing liquid, and then separated and recovered. As a result, high-efficiency desulfurization and dust removal of marine diesel engine exhaust gas has been completed, meeting the International Maritime Organization's limit standards for sulfur oxides and dust emissions from marine diesel engine exhaust gas, and meeting air pollution control and environmental pr...

AI Technical Summary

Problems solved by technology

At the same time, due to the particularity of the long-distance voyage of the ship, the reliability requirements of each part of the exhaust gas desulfurization equipment are high, so the technical difficulty is great

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