Device and method for desulfurizing waste gas of ship engine

Abstract

The invention discloses a device and method for desulfurizing waste gas of a ship engine.Seawater or fresh water and alkaline substances are used as an absorbent, and wastewater of a secondary desulfurization technology combining a primary washer and a main tower can be directly discharged into the ocean after treatment; the device comprises a flue gas system, a desulfurization system, a seawatersupply system, a wastewater treatment system and a control system, wherein the flue gas system comprises a booster fan and a connecting pipeline; waste gas from an engine chimney outlet is supercharged by a supercharged fan and then enters a desulfurization tower; the desulfurization system comprises the desulfurization tower, a circulating pump, a flow meter, and a circulating water tank; the seawater supply system comprises a filter, a seawater detector 1 and a seawater pump; the wastewater treatment system comprises a replacement pump, an aeration tank, an aeration fan, an exhaust pump, a rotary vacuum filter, a sludge tank, a seawater detector 2. The device and methodachieve the combination of dual-mode and two-stage desulfurization, thetechnological process is simple, the system adjustability is high and the operation cost is low, the device and methodare suitable for desulfurizing waste gas of the ship engine.

Description

technical field [0001] The invention relates to a marine engine exhaust gas purification technology, in particular to a marine engine exhaust gas desulfurization device and method. Background technique [0002] At present, the burning of inferior miscellaneous oil by ships makes the exhaust gas contain harmful gases such as sulfur oxides SO2, while SO 2 The pollution of the air environment is the most serious. [0003] In order to save costs, large ocean-going ships currently use heavy oil with high sulfur content as fuel. According to statistics, the average sulfur content of marine fuel oil is about 2.7%, and a few ships can reach 3.5%, or even as high as 4.5%, so the resulting SO 2 The problem of air pollution is becoming more and more serious. [0004] At present, there are mainly the following measures to control the sulfur content in the exhaust gas of marine engines: 1. Use low-sulfur heavy oil. The use of low-sulfur fuel oil will increase the operating cost of the...

AI Technical Summary

Problems solved by technology

The invention solves the problem of the ship engine, uses seawater as the absorbent and adopts the secondary desulfurization technology combining the primary scrubber and the main tower to desulfurize the exhaust gas of the ship engine

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