Ship ballast water treatment device, system and method thereof

Abstract

The invention discloses a ship ballast water treatment device, a system and a method thereof. The device comprises a photolysis chlorine disinfection treatment chamber and an ultraviolet lamp with a wavelength of 285 nm, the photolysis chlorine disinfection treatment chamber is provided with a ballast water input port, a ballast water output port and a hypochlorous acid adding port; the ultraviolet lamp with the wavelength of 285 nm is arranged in the photolysis chlorine disinfection treatment chamber; the hypochlorous acid adding opening is used for adding hypochlorous acid into the photolysis chlorine disinfection treatment chamber; ship ballast water flows into the photolysis chlorine disinfection treatment chamber through the ballast input port, and hypochlorous acid enters the photolysis chlorine disinfection treatment chamber through the hypochlorous acid adding port and is radiated by the ultraviolet lamp with the wavelength of 285 nm in the photolysis chlorine disinfection treatment chamber to be subjected to photolysis chlorine disinfection. By applying the invention, the requirements of a ballast water treatment system on high ultraviolet irradiation dose and high oxidantconcentration can be reduced, the energy consumption and environmental risk in the prior art are reduced, and the efficiency and reliability of ballast water treatment are improved.

Description

technical field [0001] The present invention relates to the technical field of water treatment, in particular to a ship ballast water treatment device, treatment system and method. Background technique [0002] The introduction of non-native organisms has been increasing exponentially across the globe for centuries. Species invasion threatens biodiversity, accelerates homogenization, and negatively impacts marine industries and human health. The most important route for the spread of aquatic invasive species is ship ballast water. Invasive algae, shellfish and bacteria discharged through ballast water have become one of the most serious problems in the ocean today. The United States Coast Guard (USCG) and the International Maritime Organization (IMO) entered into force in 2012 and 2016, respectively, the USCG ETV standard and the International Treaty on the Control and Management of Ships' Ballast Water and Sediments (Ballast Water Convention for short), All regulations st...

AI Technical Summary

Problems solved by technology

[0005] The ultraviolet disinfection process adopts traditional ultraviolet mercury lamps. The following problems exist in the disinfection of this technology: ①The effect on microorganisms such as bacteria is better, but to kill ultraviolet-resistant microorganisms such as phytoplankton and zooplankton existing in ballast water, it is necessary to increase ultraviolet radiation; Intensity or radiation dose, high energy consumption; ②UV mercury lamp has a short life, contains toxic mercury, is fragile, needs to be preheated, and is too large in size, which limits its application on ships with valuable space and high maintenance costs

[0006] The current oxidation technology uses electrolysis to produce hypochlorous acid or chlorine dioxide. The disadvantages of this technology are: ① the cost of producing high-concentration oxidants in low-salt seawater is relatively high; Microbial killing, but at the same time disinfection produces a large number of disinfection by-products, which also pose a high risk to the aquatic environment

[0007] It can be seen that most of the existing treatment systems and technologies have the characteristics of high construction and maintenance costs, high environmental risks, and low reliability. It is necessary to develop economical, efficient and stable ballast water treatment technologies and treatment systems

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