Device and method for integrally treating oily sewage at bilge of ship

A treatment method and technology of a treatment device, applied in the directions of water/sewage multi-stage treatment, water/sludge/sewage treatment, flocculation/sedimentation water/sewage treatment, etc., can solve problems such as difficult oil-water separation, filter material pollution, blockage, etc.

Inactive Publication Date: 2012-08-15
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, domestic and foreign engine room contains sewage treatment status. The main problems are: high viscosity and high concentration of sewage oil water enters the oil-water separator, and the filter material is quickly polluted or blocked, which makes the oil-water separator lose its separation performance; oily sewage enters the oil-water separator. Insufficient pretreatment before the oil-water separator leads to clogging and failure; the oil and water emulsification degree in the bilge sewage is high, resulting in difficulty in oil-water separation; to achieve the purpose of sewage reuse, it is necessary to add subsequent in-depth treatment units after the oil-water separator

Method used

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  • Device and method for integrally treating oily sewage at bilge of ship
  • Device and method for integrally treating oily sewage at bilge of ship
  • Device and method for integrally treating oily sewage at bilge of ship

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Experimental program
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specific Embodiment approach 1

[0025] Specific implementation mode one: the following combination figure 1 A flow chart of the method is described in detail. The oily sewage in the bilge passes through the collection pipeline, passes through the grid 1, and enters the adjustment tank 2. When the water volume reaches a certain level, it enters the flocculation reaction tank 3, and after flocculation, it enters the gravity oil-water separator 4. After passing through the separation action of the gravity oil-water separator, the oily sewage to be treated enters the membrane separation unit 5 . The oily sewage treated by the ultrafiltration membrane enters the mixed gas-liquid two-phase discharge device 6, and the water after final treatment is discharged through the pipeline 7 for use.

specific Embodiment approach 2

[0026] Specific implementation mode two: the following combination figure 2 A diagram of the setup illustrating the method in detail. The oily sewage in the bilge passes through the collection pipeline, passes through the grille 1, and enters the adjustment tank 2. When the water volume reaches a certain level, it enters the flocculation reaction tank 3, and the coagulant polyaluminum chloride and the coagulant polyacrylamide pass through respectively. Dosing machines 8 and 9 are put into the flocculation reaction tank. The dosage ratio of coagulant and coagulant aid is 100:1-10:1, and the residence time in the flocculation tank is 10-30 minutes. The mechanical flocculation method is adopted, and 10 is a mixer. After flocculation, it enters the gravity oil-water separator 4. The upper part of the gravity type oil-water separator has an oil scraper 11 to collect floating objects; the lower part is a sloping plate structure 12, which allows the dirt with a specific gravity gr...

specific Embodiment approach 3

[0027] Embodiment 3: The difference between this embodiment and Embodiment 2 is that the coagulant is polysilica-alumina or polyferric sulfate. Other composition and connection modes are the same as Embodiment 1.

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Abstract

The invention provides a device and a method for integrally treating oily sewage at the bilge of a ship. Oily sewage at the bilge enters into a regulating pool by passing through a collection pipeline and a grid and then enters into a flocculation reaction pool, coagulant polymerization and coagulant aids are respectively fed into the flocculation reaction pool by a reagent feeder, an agitator is arranged on the flocculation reaction pool, the oily sewage enters into a gravity type oil-water separator after being flocculated, an oil scraper is arranged on the upper part of the gravity type oil-water separator, an oblique plate structure is arranged on the lower part, the oily sewage at the bottom is collected by a sewage hopper and discharged by a blowdown pipe controlled by a blowdown valve, the oily sewage to be treated after being subjected to separation action of the gravity type oil-water separator enters into a membrane separation unit, ultrafiltrated concentrated water is discharged by a drain pipe, and a backwashing device is arranged on the membrane separation unit. By using the device and the method, the volume of a sewage storage cabinet in the ship can be saved, consumption of raw materials can also be reduced, recovery of oil resources and continuous use of treated sewage are realized, and the purposes of saving energy and reducing emission are achieved.

Description

technical field [0001] The invention relates to a sewage treatment device and method, in particular to a device and method for treating oily sewage at the bilge of a ship. Background technique [0002] Ship bilge water mainly includes oil and water leaked from various pumps, valves and pipelines in the bilge and engine room from part of the domestic sewage on board, lubricating oil leaked from machines during operation, fuel oil from main and auxiliary engines and fuel oil from refueling. Spilled oil, oily sewage produced by washing mechanical equipment and engine room iron plates, etc. are mixed together to form oily sewage. If the bilge water cannot be treated in time, it will increase the volume of the ship's sewage storage tank. In addition, if these oily sewage cannot be effectively treated and discharged directly, it will pollute the marine environment, reduce the resistance of aquatic organisms, reduce production, mix carcinogens in the water food chain and human aqu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/06C02F1/52C02F1/56C02F1/40
Inventor 朱丽楠王永军任芝军刘桂芳米海蓉
Owner HARBIN ENG UNIV
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