Ship oily water monitoring and discharging system based on PLC

Abstract

The invention provides a ship oily water monitoring and discharging system based on a PLC. The ship oily water monitoring and discharging system comprises an upper computer, the PLC, also known as anelectric cabinet, and a ship bilge oily water separator, wherein the upper computer is connected with the PLC, and the upper computer is used for monitoring a working state of the PLC and issuing a control program to the PLC; the PLC is connected with the ship bilge oily water separator; and when the PLC monitors that sewage separated by the ship bilge oily water separator meets a discharge standard, the PLC controls the ship bilge oily water separator to discharge the sewage out of a ship. According to the monitoring and discharging system, the oily water separation efficiency is greatly improved by arranging the ship bilge oily water separator of a specific structure, an inclined plate assembly is specially designed, the upper computer is adopted for monitoring the working state of the PLC in real time, when the upper computer judges that the PLC is abnormal, a sound-light alarm signal is sent out, the PLC stops working, and the safety of the system is guaranteed.

Description

technical field [0001] The invention relates to the technical field of computer control, in particular to a PLC-based monitoring and discharging system for ship oily sewage. Background technique [0002] Ship sewage can be generally divided into two categories: domestic sewage and oily sewage: domestic sewage includes black water and gray water (kitchen gray water, washing gray water), and oily sewage includes bilge oily sewage, oil tank ballast water, tank washing water . As countries around the world pay more and more attention to the marine environment, the discharge of ship sewage is currently facing the following challenges: (1) more stringent regulatory requirements; (2) higher hydraulic load and more organic pollution (3) Zero discharge requirements in special sea areas. [0003] At present, the traditional relay contact oil-water separation control system used in real ships, because the motor and its control equipment have been working in a humid, salt spray and du...

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Problems solved by technology

[0005] In addition, in the prior art, due to the unreasonable structural setting of the ship bilge oily sewage separator, the oil-water separation efficiency is low, which affects the oil-water separation efficiency, and the oily sewage may need multiple cycles of treatment to treat the sewage to the discharge standard

[0006] In the prior art, due to the relatively humid environment of the ship, the PLC controller may be damaged at any time, resulting in failure to work normally and affecting the treatment and discharge of oily sewage

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