Oceangoing vessel ballast water processing method

Abstract

The invention discloses an oceangoing vessel ballast water processing method. According to the method, air over the ballast water in ballast water chambers is evacuated by an inert gas, the ballast water in the ballast chambers is pumped out of the ballast chamber, the ballast water is subjected to blow-off mixing by the inert gas to generate a physical reaction, a soluble inert gas is merged into the ballast water when oxygen in the ballast water is sucked out, and the processed ballast water is discharged into the ballast water chambers. A device of the method comprises the ballast chambers, ballast pumps, Venturi ejectors and an inert gas generator. The ballast water processing method of the invention, which is a physical method, needs no extra chemical agents or relevant dosing devices; the physical reaction can be directly generated in the Venturi ejectors, and no filter devices are needed before the reaction generation, so time-cost regular cleaning is not needed, the water flow is not influenced, the discharge time is reduced, and the chambers are protected from oxidation corrosion, thereby the reliability of the ballast water processing effect is guaranteed; and the method of the invention, which has a very good practicality, can generate very good economic benefits and social benefits.

Description

technical field [0001] The invention relates to a ballast water treatment method and device for ships, in particular to a ballast water treatment method for ocean-going ships and a special treatment device thereof. Background technique [0002] At present, ship transportation is an important link in the global logistics chain, and more than 80% of goods in international trade are transshipped by ships. Ocean-going ships inject and discharge ballast water, causing harmful aquatic organisms and pathogens to spread across the ocean. The uncontrolled discharge of ballast water has caused serious harm to marine ecology and public health. The resulting marine ecological damage accidents are numerous. The Global Environmental Fund (GEF) listed it as one of the four major hazards to the ocean. [0003] In order to effectively control and prevent the invasion of alien species caused by the discharge of ship ballast water, the damage to the environment, human health, property and res...

AI Technical Summary

Problems solved by technology

Three times the amount of exchanged water, the load of the ballast pump is large, and the exchange time is long, but since the ballast tank is always in a full state, the impact of these two exchange methods on the stability and strength of the ship is negligible, due to the dilution method Two sets of pumps are required to pump ballast water in at the top and pump out at the bottom separately, and the flow rate of pumping in and pumping out needs to be kept equal to keep the water level in the tank constant and the pressure in the tank constant. The piping system is relatively complex

Existing ships generally do not adopt this exchange method

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