Membrane module for recovering lightweight microscale oil stain in water area

Abstract

The invention relates to a membrane module (1) for recovering lightweight microscale oil stain in a water area, which is characterized by comprising an oil-water separating membrane (2), a spacing membrane (3), a water inlet pipeline (4), an oil outlet pipeline (5), an oil storage tank (6) and a water outlet pipeline (7). A main functional part is capable of separating oil and water by the oil-water separating membrane (2) which can change a hydrophilic and hydrophobic structure by following the temperature change, membrane obstruction status can be improved by adjusting temperature, membrane cleaning process is simple, and membrane usage life is long. According to the invention, a laying design of the membrane is in a tilting mode, characteristic of oil part on water surface and an overflow principle are used to realize the oil-water separation. The membrane module can be used in water surface large scale ship oil-overflowing accidents, overflowed oil is recovered, and then residual lightweight microscale oil stain is treated by a physical treatment method and a routine machinery recovery device, key monitoring water area polluted by slight petroleum for long time can be treated, and effect of no secondary pollution and deep treatment for the water body petroleum pollution can be reached.

Description

technical field [0001] The invention belongs to the technical field of application of membrane modules for recovery of oil pollution in water areas and treatment of oil pollution, in particular to a membrane module capable of recovering trace and light oil pollution in water areas. Background technique [0002] With the development of international trade and maritime transportation, the number of ships sailing in oceans, rivers and lakes is increasing. Oil spill pollution caused by escaping or discharging oil cargo, fuel oil and other oily substances during normal operation or accidents of ships has become an environmental problem on a global scale. Some large-scale ship oil spills will seriously pollute the waters and bring huge losses, and the development of tourism and fisheries in waters polluted by light ship oil spills for a long time has also been restricted, and its chronic harm has become increasingly prominent. China is a big shipping country, and there are many p...

AI Technical Summary

Problems solved by technology

However, due to the process of intercepting oil in the separation membrane, as the oil accumulates on the surface of the membrane, the membrane will be blocked soon, and the membrane flux will drop significantly.

For this reason, the membrane has to be cleaned. The online cleaning method is generally reverse injection of cleaning water or cleaning agent, which consumes resources and has the risk of chemical reagent leakage.

After the cleaning effect is not ideal or after multiple cleanings, the separation membrane needs to be removed from the device for replacement, which is also a problem for ship-borne devices used in the open sea

Images