High-power diesel engine pollutant discharge countercurrent catalytic conversion cooperative treatment device with sulfur catchers

Abstract

The invention provides a high-power diesel engine pollutant discharge countercurrent catalytic conversion cooperative treatment device with sulfur catchers. The device comprises a device body shell, an air flow pipeline and a wall flow type filter body arranged in the air flow pipeline, wherein the sulfur catchers are symmetrically arranged on the two sides of the wall flow type filter body correspondingly, porous ceramics are arranged on the outer sides of the sulfur catchers correspondingly , a pair of valves are arranged in the air flow pipeline, and the flowing mode of air flow in the device is controlled by adjusting opening and closing of the valves. The device is applied to marine diesel engine pollutant control of heavy residual oil for combustion, and can effectively solve the technical problems that the additional input energy of an aftertreatment device affects the engine economical efficiency, catalyst sulfur pollution poisoning and ash deposition blockage, efficient trapping of particles in tail gas is achieved, black carbon particles on the wall face of a DPF channel are oxidized, NOx is reduced into N2, CO, HC and other components in the tail gas are oxidized, accumulated ash in a DPF is reversely blown away, and regeneration of the DPF and cooperative treatment of a plurality of pollutants such as the CO, the HC, PM and the NOx are achieved.

Description

technical field [0001] The invention relates to the technical field of post-treatment of diesel engine exhaust, in particular to a high-power diesel engine pollutant emission countercurrent catalytic conversion co-processing device with a sulfur trap. Background technique [0002] In recent years, my country has made great efforts to control smog, so that land pollution sources have been effectively controlled, and the effect of smog control is obvious. As a mobile pollution source, ships emit CO, HC, particulate matter, sulfur oxides, nitrogen oxides and other exhaust gas pollutants that have a significant impact on my country's atmospheric environment, especially in coastal areas and areas along the river. Due to the lack of effective countermeasures, it is difficult to effectively control the pollutant emissions of marine diesel engines in a short period of time. [0003] Exhaust emissions from marine diesel engines have become the main source of air pollution in coastal...

AI Technical Summary

Problems solved by technology

Due to the low exhaust gas temperature, high pollutant emission concentration and complex composition of marine diesel engines, mature post-treatment technologies for land-use diesel engines such as CO and HC treatment technology, SCR treatment NOx emission technology and DPF technology , there are unresolved key technical problems such as difficulty in ignition at low temperature, restriction of pollutant emission components, deactivation of catalyst sulfur pollution, and clogging of ash accumulation, so it is difficult to popularize and apply it in post-treatment of marine diesel engine pollutant emissions

In recent years, research on emission control technologies for marine diesel engines fueled with HFO and IFO, such as DOC technology for CO and HC treatment, SCR denitrification technology, wet mixing system desulfurization technology and DPF technology, are all carried out for single pollutant emissions Yes, various technologies will also influence and restrict each other, and there are problems such as large device structure, complex control system and negative impact on diesel engine performance

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