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Ship ballast water treating process and apparatus

A technology for ship ballast water and a treatment method, which is applied in the field of ship ballast water treatment equipment and can solve the problems of high cost and low treatment method efficiency.

Inactive Publication Date: 2007-06-06
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a treatment method for ship ballast water to solve the problems of low efficiency and high cost of existing ship ballast water treatment methods

Method used

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  • Ship ballast water treating process and apparatus
  • Ship ballast water treating process and apparatus
  • Ship ballast water treating process and apparatus

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Experimental program
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specific Embodiment approach 1

[0009] Specific embodiment one: the treatment method of ship's ballast water in this embodiment is realized through the following steps successively: a, ship's ballast water is filtered, removes the sundry greater than 50 microns; Can use filter to filter out sundry when filtering things. c. Irradiate the ship's ballast water with ultraviolet light to remove bacteria, single-celled algae, and protozoa in the ballast water.

specific Embodiment approach 2

[0010] Embodiment 2: The difference between this embodiment and Embodiment 1 is: this embodiment also includes step b between step a and step c, mixing ozone into the ship's ballast water. Other steps are the same as those in Embodiment 1.

[0011] Under ultraviolet light irradiation, ozone undergoes the following reactions to generate hydroxyl radicals:

[0012]

[0013]

[0014] Or proceed as follows:

[0015]

[0016]

[0017] The standard redox potential of HO is as high as 2.80 V, second only to F 2 2.87V, which has a higher oxidation capacity than other common oxidants, which can directly damage the DNA of microorganisms and cause the death of microorganisms.

specific Embodiment approach 3

[0018] Specific embodiment three: the difference between this embodiment and embodiment one is: while irradiating the ship's ballast water with ultraviolet light in step c, add TiO in the photocatalytic reactor 2 Metal doped photocatalysts. Other steps are the same as those in Embodiment 1.

[0019] TiO 2 Holes are generated under UV radiation (h + ) and electrons (e - ), and then produce hydroxyl radicals:

[0020]

[0021]

[0022]

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Abstract

The present invention is ship ballast water treating process and apparatus. The ship ballast water treating process includes the following steps: filtering to eliminate foreign matters of size over 50 microns, and treating in a photocatalytic reactor through the common effects of ultraviolet radiation and free hydroxyl group to kill microbes and reach the required water quality. The corresponding apparatus includes filter, control valves, photocatalytic reactor, ultraviolet lamp, ozone generator and mixing jet device. The filter has inlet connected to the ballast water pipeline and the outlet connected via one control valve to the photocatalytic reactor with ultraviolet lamp in its inside cavity.

Description

technical field [0001] The invention relates to a treatment method for ship's ballast water, and also relates to a treatment device for ship's ballast water. Background technique [0002] The problem of off-site discharge of ship ballast water has been listed by the International Maritime Organization (IMO) and international environmental supervision departments as one of the four major hazards to the global marine ecological environment security. According to the statistics of the International Maritime Organization, more than 10 billion tons of ballast water are discharged into the ocean every year in the world, and at least 7,000 organisms travel to other places with the ballast water of ships every day. Species invade each other, exacerbating the deterioration of the marine ecological chain and environment. The amount of freight transported by ships accounts for 80% of the total global freight, and there are more and more ocean-going ships, so ship ballast water has bee...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/32C02F1/78B01J21/06B63B29/16
Inventor 尤宏吴东海杜清华曹学磊
Owner HARBIN INST OF TECH
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