Novel wet type ship waste gas comprehensive treatment method and device

A technology for comprehensive treatment and exhaust gas

Active Publication Date: 2015-07-15
聚方(大连)环保技术有限公司
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Problems solved by technology

[0005] According to the existing technology proposed above, it is necessary to occupy the effective space of the ship to store a large amount of chemical substances, which brings

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  • Novel wet type ship waste gas comprehensive treatment method and device

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Embodiment Construction

[0039] A novel wet ship exhaust gas comprehensive treatment method has the following steps:

[0040] 1) The exhaust gas emitted by marine diesel engines is mixed with natural seawater to remove SO in the exhaust gas X and PM, to obtain a waste liquid and a purified waste gas,

[0041] Natural seawater reacts chemically with the waste gas as shown below:

[0042] SO 2 (g)→SO 2 (l),

[0043] SO 2 (l)+H 2 O→HSO 3 - +H3O + ,

[0044] HSO 3 - +H 2 O→SO 3 2- +H 3 o + ,

[0045] 2SO 3 2- +O 2 →2SO 4 2- ,

[0046] The SOx and PM in the exhaust gas are washed and removed by natural seawater, and the pH value of the obtained primary waste liquid changes from about 8 to an acidic range of 2-5, and contains more impurities such as sulfite and particulate matter ;

[0047] 2) Natural seawater enters the cathode tank of the diaphragm electrolysis device and reacts with the cathode to obtain a strongly reducing and strongly alkaline solution; after the primary waste ...

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Abstract

The invention discloses a novel wet type ship waste gas comprehensive treatment method. The novel wet type ship waste gas comprehensive treatment method comprises the following steps: treating waste gas emitted by a ship diesel engine by natural sea water, high-oxidation and high-acidity solutions and high-reduction and high-alkali solutions, directly discharging the purified water gas into atmosphere, diluting the obtained purified waste liquid by natural sea water, and discharging into the sea. The invention also discloses a novel wet type ship waste gas comprehensive treatment device. The novel wet type ship waste gas comprehensive treatment device comprises a main seawater pipe, a primary spraying column, a pre-oxidation device, a secondary spraying column and a diaphragm electrolysis device, wherein an atomizer I in the primary spraying column is communicated with a pipeline branch I; an atomizer III in the secondary spraying column is communicated with a liquid exhaust hole of a cathode cell of the diaphragm electrolysis device. According to the invention, the required high-oxidation and high-alkali solutions are prepared by adopting the electrolysis method so as to achieve the aims of online application and synchronous desulfurization and denitrification, so that the ship safety hazard and the additional investment cost due to additional loading and storage of chemical medicine in a ship are reduced.

Description

technical field [0001] The invention belongs to the technical field of prevention and control of air pollution caused by ships, and in particular relates to a novel wet ship exhaust gas comprehensive treatment method and device. Background technique [0002] According to statistics released by the International Chamber of Shipping and the Hong Kong Shipowners Association, more than 90% of the world's international trade is completed by sea transportation, and there are about 50,000 merchant ships of more than 300 gross tons engaged in ocean-going transportation worldwide. The vast majority of merchant ships use diesel engines as the main propulsion power plant and prime mover for power generation. In recent decades, in order to reduce operating costs, most marine diesel engines use cheap heavy residual oil as fuel. This type of fuel oil has high sulfur content, high viscosity, and high residual carbon value, resulting in exhaust emissions from marine diesel engines. The ser...

Claims

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Application Information

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IPC IPC(8): B01D53/78B01D53/56B01D47/00C02F1/461C02F9/06C02F103/18C02F103/08
Inventor 韩志涛杨少龙严志军潘新祥孔清季向赟孙建颂
Owner 聚方(大连)环保技术有限公司
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