Method for preventing ship ballast water from overflowing

Abstract

The invention relates to a method for preventing ship ballast water from overflowing. A ship ballast water system is arranged. The ship ballast water system comprises a plurality of ballast tanks, water injection equipment and drainage equipment, wherein the plurality of ballast tanks are all connected with the water injection equipment, the water injection equipment can inject seawater outside aship into the ballast tanks, the drainage equipment is arranged between the ballast tanks and the water injection equipment, and the seawater in the water injection equipment can be drained to the outside of the ship through the drainage equipment; a maximum water level value and an adjusting water level value are set for the ballast tank, and when the actual water level in the ballast tank reaches the adjusting water level value, the water injection speed is decreased; when the actual water level in the ballast tank reaches the maximum water level value, the seawater in the water injection equipment is discharged to the outside through the drainage equipment; and finally, the water injection condition and the actual draught value of the ballast tank are detected. Two water level values are set for the ballast tank, the water injection speed is adjusted and water injection is stopped when the actual water level reaches the corresponding water level value during water injection, and overflow caused by untimely closing of water injection is avoided.

Description

technical field [0001] The invention relates to the technical field of ships, in particular to a method for preventing overflow of ballast water in ships. Background technique [0002] In the shipbuilding industry, especially for ro-ro passenger ships, in order to ensure that they have a draft that can ensure safe navigation and meet the requirements of ship floating state adjustment under various loading conditions, it is necessary to set up a certain number of ballast tanks so that The adjustment of the water volume in the load compartment controls the draft and buoyancy of the ship under various loading conditions. When filling the ballast tank with water, the valve of the ballast tank may not be closed in time, so that the ballast water overflows through the vent pipe after filling the ballast tank, causing water accumulation in the vent pipe, and even affecting the normal navigation of the ship. make an impact. At the same time, in order to improve the water injection...

AI Technical Summary

Problems solved by technology

When filling the ballast tank with water, the valve of the ballast tank may not be closed in time, so that the ballast water overflows through the vent pipe after filling the ballast tank, causing water accumulation in the vent pipe, and even affecting the normal navigation of the ship. make an impact

At the same time, in order to improve the water injection efficiency, the water injection speed of the ballast tank is relatively high. When the water level detector in the ballast tank feedbacks the water level and then closes the corresponding water inlet valve, a large amount of ballast water will still be injected during this process, which is easy to cause Dangers of Overinjection

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