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System and method for efficiently removing sulfur oxide in ship waste gas

A technology of sulfur oxides and waste gas, which is applied in chemical instruments and methods, separation methods, and dispersed particle separation, etc., can solve the problems of low desulfurization efficiency, achieve the effects of improving desulfurization efficiency, reducing occupied space, and reducing system energy consumption

Inactive Publication Date: 2015-11-18
SOUTHEAST UNIV
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Problems solved by technology

[0011] In view of the deficiencies of the above-mentioned prior art, the purpose of the present invention is to provide a system and method for efficiently removing sulfur oxides in ship exhaust gas, so as to solve the problem that the desulfurization efficiency of seawater desulfurization technology is generally low when it is applied on ships, and alleviate the problem of seawater desulfurization. The contradiction between the space occupancy rate of the desulfurization system and the desulfurization efficiency

Method used

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  • System and method for efficiently removing sulfur oxide in ship waste gas
  • System and method for efficiently removing sulfur oxide in ship waste gas
  • System and method for efficiently removing sulfur oxide in ship waste gas

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Embodiment 1

[0048] Such as figure 2 Shown is a system schematic diagram of an embodiment of the method for efficiently removing sulfur oxides from ships of the present invention. The system of this embodiment includes a fresh seawater pool 10, an aeration tank 5, a pre-spray chamber 2, a desulfurization tower 9, and a fresh seawater pool 10 The aeration tank 5, the pre-spray chamber 2 and the desulfurization tower 9 are respectively connected, and the fresh seawater pool 10 is connected with the upper part of the desulfurization tower 9; the pre-spray chamber 2 is connected with the exhaust gas outlet of the ship, and is connected with the desulfurization tower 9 through a pipeline, and the desulfurization The lower part of the tower 9 is a seawater bubbling area, in which a gas distribution pipe is arranged, and the bottom of the gas distribution pipe is connected to the first aeration fan 3, and the bottom of the desulfurization tower 9 is also connected to the aeration tank 5 through t...

Embodiment 2

[0063] Such as image 3 Shown is a schematic diagram of another embodiment of the method for efficiently removing sulfur oxides in ships according to the present invention. The difference from Embodiment 1 is that the bubbling method of this embodiment adopts coil bubbling, and the coil 62 is completely immersed in the seawater liquid surface Below, the exhaust gas inlet pipeline is arranged vertically, and the rest of the system and desulfurization steps are consistent with those in Example 1. The desulfurization efficiency of this embodiment can reach more than 95%.

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Abstract

The present invention discloses a system and a method for efficiently removing sulfur oxide in ship waste gas. The removal process is divided into three stages: a pre-treatment stage, bubbling and primary desulfurization stage, and a spraying and secondary desulfurization stage. The method comprises the following steps of: respectively introducing fresh sea water into a pre-spraying chamber, a desulfurization tower and an aeration tank through pipelines; firstly cooling the high-temperature waste gas, and removing part of sulfur oxides in the pre-spraying chamber; introducing the cooled waste gas into the desulfurization tower and uniformly spraying the cooled waste gas into a sea water bubbling zone through a gas distribution tube; introducing the waste gas into a spraying zone through an ascending passage of the desulfurization tower so as to carry out further removal of sulfur oxides; demisting the waste gas by a demister, and discharging the demisted waste gas into the atmosphere through a chimney; and restoring the water quality of desulfurized seawater by virtue of primary aeration in the desulfurization tower and secondary aeration in an aeration tank. Compared with a traditional seawater desulfurization technology, on the premise of not increasing the space occupancy rate of the seawater desulfurization system, the method solves the problem that the desulfurization efficiency is generally low when seawater desulfurization technology is applied in ships.

Description

technical field [0001] The invention belongs to the technical field of prevention and control of ship exhaust gas pollution, and in particular relates to a system and method for removing sulfur oxides in ship exhaust gas by using seawater. Background technique [0002] With the increase of world trade volume, ships are an important means of transportation, and their transportation capacity has developed rapidly in the 21st century. At present, there are more than 85,000 ships with a tonnage of more than 100 tons in the world. However, the exhaust pollution caused by the development of the shipbuilding industry is worrying, especially the pollution of sulfur oxides. According to statistics, the annual emission of sulfur oxides from ships in the world has reached more than 9 million tons, accounting for about 7% of the world's total emissions of sulfur oxides and about 60% of the emissions of sulfur oxides in the entire transportation industry. [0003] At present, there are ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/18B01D53/14
Inventor 陈晓平张清凤余帆
Owner SOUTHEAST UNIV
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