Ship waste gas desulfurization system

A technology for desulfurization of waste gas and ships, which is applied in the fields of dispersed particle filtration, dispersed particle separation, chemical instruments and methods, etc. It can solve the problems of complex washing water treatment system, large volume and high cost, and achieve the goal of simplifying wastewater treatment process and reducing costs. Effect

Active Publication Date: 2018-06-22
SUNRUI MARINE ENVIRONMENT ENG
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  • Claims
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AI Technical Summary

Problems solved by technology

In order to treat the washing wastewater, the combination of air flotation, flocculation, filtration, centrifugal separation and other processes is generally used at present to meet the discharge standards, resulting in complex washing water treatment system, large volume and high cost

Method used

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  • Ship waste gas desulfurization system

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Embodiment 1

[0035] A 72000DWT bulk carrier, the main engine power is 8000kw, the exhaust gas flow rate is 60000kg / h, using 3.5% high-sulfur oil as fuel, and the concentration of sulfur oxides in the exhaust gas is 650ppm. Using the ship exhaust gas desulfurization system of the present invention, the treated SO in exhaust gas 2 (ppm) / CO 2 The (%v / v) ratio is less than 4.5, which can meet the requirements of IMO. At the same time, the removal rate of particulate matter in the exhaust gas is above 80%. The liquid-gas ratio of the washing tower is less than 3, the consumption of fresh water is less, and the washing wastewater discharged meets the requirements of MEPC259 (68).

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Abstract

The invention provides a ship waste gas desulfurization system. The ship waste gas desulfurization system comprises a filtering oxidization device and a washing tower, wherein the filtering oxidization device comprises a waste gas filtering structure provided with an oxidant; a gas inlet of the filtering oxidization device is connected with an exhausting opening of a diesel engine through a firstpipeline; the washing tower is provided with a washing liquid spraying nozzle, a desulfurization waste gas outlet and a washing wastewater outlet; a gas inlet of the washing tower is connected with anexhausting opening of the filtering oxidization device; the washing liquid spraying nozzle is connected with a washing liquid supply system. According to the ship waste gas desulfurization system provided by the invention, the filtering oxidization device is arranged in front of the washing tower, part of particles in waste gas are removed through the filtering oxidization device and SO2 is oxidized into SO3; the desulfurization efficiency of the washing tower can be improved and a wastewater treatment flow is simplified.

Description

technical field [0001] The invention relates to the technical field of air pollution prevention and control, in particular to a ship exhaust gas desulfurization system. Background technique [0002] Annex VI of the MARPOL Convention promulgated by IMO stipulates the emission of SOx in ship exhaust gas. The reduction of SOx emission in ship exhaust gas can be achieved by using alternative fuels such as low-sulfur oil, but most of them use seawater washing and other exhaust gas post-treatment methods. accomplish. The current seawater washing desulfurization method can be divided into sodium-based method, magnesium-based method, etc. according to different desulfurizers. According to the control logic, it can be divided into open-loop and closed-loop hybrid methods. Although the seawater washing method can meet the requirements of IMO, But there are still many problems. [0003] Since SOx in the exhaust gas is mainly in the form of SO 2 The type exists, SO 3 content is less...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/81B01D53/50B01D46/30
CPCB01D46/30B01D53/1481B01D53/508B01D53/81B01D2251/10B01D2252/10
Inventor 范昊赵超高健于航张文涛王廷勇
Owner SUNRUI MARINE ENVIRONMENT ENG
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