Device and method for cooling and dust removal of exhaust gas from marine diesel engine

Abstract

The present application discloses a marine diesel engine exhaust cooling and dedusting device and method, which relates to the technical field of marine diesel exhaust cooling, dust removal and purification, and belongs to an energy-saving and environment-friendly marine diesel exhaust cooling and dedusting treatment technology. In the process of fluid flow, it is redistributed once every time it passes through a set of moving rings-static rings, which is equivalent to the series connection of multiple end-effect zones in the rotating bed dust collector, which further strengthens the mixing and mass transfer process. At the same time, the fluid between the stator and the rotor is subjected to high shear action, and the dust in the gas is highly dispersed into tiny droplets, which strengthens the mixing effect between the dust and the water droplets, and solves the problem that the dust with a particle size of less than 1.0 μm cannot be captured. the problem.

Description

technical field [0001] The invention belongs to the field of environmental protection, in particular to the technical field of cooling, dedusting and purifying marine diesel engine exhaust, in particular to a marine diesel exhaust cooling and dedusting device and method. Background technique [0002] The exhaust gas emitted from the combustion of marine diesel engines is a heterogeneous system composed of solid particles, gases and liquid droplets. 2 , nitrogen oxides NO 2 , carbon monoxide CO, hydrocarbons HC are mainly, the particle size distribution of general particulate matter PM is between 0.01~1.0μm, the discharge temperature is 230~550℃, the discharge pressure is 2500~6000Pa, and the dust content of the exhaust gas is 20~100mg / Nm 3 . [0003] Taking the technical parameters of the exhaust gas discharged from the engine of the 800-ton self-unloading sand ship as an example, the description is as follows in Table 1: [0004] Table 1: Technical parameter table of e...

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Problems solved by technology

[0008] This application provides a marine diesel engine tail gas cooling and dust removal device and method, which solves the technical problems of complex equipment, high smoke and dust content, and high cost in the existing marine diesel engine tail gas cooling and dust removal method, so that the exhaust gas of marine diesel engines can be discharged up to the standard

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