Ship off-gas treatment system and method with on-line regeneration and off-line ash removal

Abstract

The invention relates to a ship off-gas treatment system with on-line regeneration and off-line ash removal. The ship off-gas treatment system comprises an inlet valve, a throttle valve, a combustiblegas and particulate matter treatment combined device, an outlet valve, a reducing agent metering and injection device, an SCR device, a compressed air valve and a filter; the inlet valve and the outlet valve are correspondingly arranged on an inlet main pipe and an outlet main pipe of the combustible gas and particulate matter treatment combined device; and the combustible gas and particulate matter treatment combined device is composed of a plurality of combined device units, an electric heater, a DOC catalyst and a DPF catalyst are sequentially installed on each combined device unit from bottom to top, a differential pressure transmitter is installed on each combined device unit body, and a temperature switch is installed at an outlet of each combined device unit. The ship off-gas treatment system has the beneficial effects that through the combustible gas and particulate matter treatment combine device, the compressed air valve and a particulate matter filter, the purposes of on-line regeneration and off-line ash removal are achieved, the gaseous and solid pollutants in the off-gas are removed, the energy consumption is low, and the regeneration is convenient.

Description

technical field [0001] This patent relates to the technical field of ship tail gas treatment, in particular to a renewable ship tail gas treatment system. Background technique [0002] Ship exhaust emissions are one of the main sources of air pollution in port cities and inland river areas. With the development of the shipping industry, ship exhaust emissions seriously affect air quality and have a great negative impact on the environment and human health. Therefore, controlling ship exhaust Pollutant discharge is imminent. [0003] DPF+SCR+DOC is currently a more commonly used ship exhaust comprehensive treatment system. However, the oil products burned by marine engines are relatively poor, and the particulate matter and sulfur dioxide in the exhaust gas are high, which seriously affects the performance of DOC catalysts and DPF catalysts. Regular regeneration is required, and non-combustible particulate matter needs to be cleaned regularly. Conventionally, the active reg...

AI Technical Summary

Problems solved by technology

Generally, DPF adopts fuel injection combustion regeneration. This method is complex and requires continuous consumption of fuel, and has extremely high requirements on the atomization effect and layout conditions of fuel injection. For a large-flow exhaust gas treatment system, it is difficult to spray evenly

At the same time, the cleaning of non-combustible particles needs to be removed and returned to the factory for dust removal

Seriously affect the continuous operation of the ship

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