A control method of a ship ballast water treatment system with a pressurized hydrogen removal electrolysis system

By employing a pressurized cyclone separator and automatic regulating valve control in the electrolytic ballast water treatment system, the problems of numerous and unreliable components in atmospheric pressure cyclone separators have been solved. This has resulted in simplified equipment and efficient separation of hydrogen and sodium hypochlorite solution, meeting ship structural design specifications and improving the system's safety and reliability.

CN118754264BActive Publication Date: 2026-03-03SUNRUI MARINE ENVIRONMENT ENG +1
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Patent Information

Application Number
CN202410816157.5
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-06-24
Publication Date
2026-03-03
Estimated Expiration
2044-06-24

AI Technical Summary

Technical Problem

In existing ballast water treatment systems using electrolysis, atmospheric pressure cyclone separators are large in size, have many components, and low reliability. They also require buffer tanks and variable frequency dosing devices.

Method used

A pressurized cyclone separator is used. Seawater is injected into the electrolyzer through a booster pump. Gas-liquid separation is performed by the cyclone separator. The pressure inside the cyclone separator is controlled within the range of 2-7 bar by a level gauge and an automatic regulating valve. The buffer tank and variable frequency dosing device are omitted. Combined with an explosion-proof fan to dilute the hydrogen concentration, efficient separation and safe discharge of hydrogen and sodium hypochlorite solution are achieved.

Benefits of technology

The equipment structure was simplified, the system reliability and safety were improved, the system cost was reduced, the existing ship structural design specifications were met, and the separation and inactivation sterilization effects of hydrogen and sodium hypochlorite solution were achieved efficiently.

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Abstract

This invention discloses a control method for a pressurized hydrogen removal electrolysis system in a ship ballast water treatment system. The method includes: injecting seawater into an electrolysis cell via a booster pump; the resulting gas-liquid mixture entering a cyclone separator through an inlet pipe for pressurized gas-liquid separation; monitoring the liquid level in the cyclone separator in real time using a level gauge; and automatically interlocking control by adjusting the opening of the automatic hydrogen regulating valve on the hydrogen discharge pipe and the automatic chemical dosing valve on the chemical dosing pipe, thereby maintaining the pressurized pressure range within the cyclone separator at 2-7 bar. Compared with existing technologies, the advantages of this invention are: its control logic is simple, its safety and reliability are high, and the hardware does not require buffer tanks, variable frequency chemical dosing devices, etc., offering advantages such as fewer devices, smaller size, and higher reliability.
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