Method for treating ship ballast water by injecting oxygen active particles in transmission pipe

Abstract

The invention provides a method for treating ship ballast water by injecting oxygen active particles in a transmission pipe and belongs to the technical fields of plasma physics and marine environmental protection application. The method is characterized in that oxygen is ionized and dissociated in a strong ionization electric field to form oxygen active particles (O2+, O(1D), O(3P) and O3), and the concentration of the oxygen active particles reaches 100 mg / L to 400 mg / L; the oxygen active particles react with the ballast water to generate a HO2- initiator with a reaction rate constant of 2.2*106 L / mol.s, and the concentration of the HO2- initiator reaches 40 mg / L to 300 mg / L; the oxygen active particles react with the ballast water under the action of the HO2- initiator to generate hydroxyl radicals (.OH), and the concentration of the hydroxyl radicals reaches 0.4 mg / L to 160 mg / L; and the efficiency of killing aquatic organisms and pathogens in the ballast water reaches 96% to 100%. The invention has the benefit and advantage of solving the problems of ballast water treatment and providing the simple and high-efficiency ballast water treatment method which does not need catalysts, absorbents or reducers and does not cause any adverse effect on the environment.

Description

technical field [0001] The invention belongs to the application technical field of plasma physics and marine environment protection, and relates to a method for treating ship ballast water by injecting oxygen active particles in a transportation pipeline. Background technique [0002] Disasters caused by the invasive spread of alien pests have been identified by the Global Environment Facility (GEF) as one of the four major threats to the ocean. The ballast water discharged from ships is the most important way for the spread of harmful organisms among geographically isolated water bodies. Each year, ships around the world carry about 10 billion tons of ballast water, and a cargo ship with a load of 100,000 tons can carry 50,000 to 60,000 tons of ballast water. On average, there are 110 million phytoplankton and 100,000 bacteria per cubic meter of ballast water. 3 100 million, virus 1 billion 4 There are 3000-4000 species of organisms carried in ballast water every day in t...

AI Technical Summary

Problems solved by technology

[0003] 1) "The method of replacing ballast water in the deep sea" consumes high energy, and the operation and operation time is too long;

[0004] 2) The method of excessive chlorine addition to ensure the killing of microorganisms not only aggravates the corrosion of the facilities in the cabin, but also produces carcinogenic organic chlorides. There will be safety problems such as leakage and explosion when storing several tons of liquid chlorine on board;

[0005] 3) Currently available methods such as on-board replacement or on-shore processing at the destination port have problems such as safety and high energy consumption, or the local government invests in the maintenance and setting management of several sample ports.

But the problem that the above-mentioned hydroxyl radical generation method exists: (1) the concentration and generation amount of producing OH are small, can only carry out experiment and application research in a small range; (2) need to add a large amount of medicaments when processing hydroxyl radical and catalysts such as H 2 o 2 , O 3 、TiO 2 , Fe 2+ (iron salt), mostly H 2 o 2 , O 3 As the main body of the reaction, there are high governance costs and the use of H 2 o 2 (3) The chemical reaction rate constant is lower than 3L / mol s, and the chemical reaction time is 20min-90min; (4) High-efficiency bubble column reactors, rotating packed bed reactors, Fluidized bed photocatalytic reactors, impinging flow reactors and other huge equipment in order to enhance the biochemical reaction rate and improve processing efficiency; (5) Due to the poor penetrability of ultraviolet radiation (UV), it is necessary to add huge ultraviolet radiation equipment, which is difficult to Applied to the treatment of ballast water on large ships

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