Oil separator

Abstract

When the oil component in water to be treated is passed for separation through two stages, a coarse-graining element (9) in a front stage separation chamber (4) and a coarse-graining element (16) in a rear stage separation chamber (5), occurrence of clogging in the coarse-graining element (16) in the rear stage separation chamber (5) is avoided to improve the rate of separation of oil component. The water to be treated moving from the front stage separation chamber (4) to the rear stage separation chamber (5) is filtered by a filter element in a filter (20), whereby the solid particle component contained in the water to be treated is separated.

Description

technical field [0001] The present invention relates to an oil-water separator capable of separating the water to be treated into oil and water when oil such as bilge water of a ship is mixed with water to be treated such as waste water. Background technique [0002] Patent Document 1, which is a prior art, proposes a method in which, first, water to be treated containing oil is introduced into a pre-separation chamber, and then passed through a coarse-graining element having a relatively large mesh. (It is a material that has the function of coagulating and coarsening when extremely fine oil droplets pass through the through-hole), thereby coarsening the oil droplets to float and separate, and then separating the processed oil from the pre-stage separation chamber. Water is introduced into the rear-stage separation chamber, and is passed through the coarse-grained element having a mesh size smaller than that of the coarse-grained element of the preceding-stage separation ch...

AI Technical Summary

Problems solved by technology

[0004] However, in this prior art, the separation rate of oil can be further improved by forming finer meshes of the coarse-graining elements in the subsequent separation chambers among the separation chambers. However, while the water to be treated contains oil, Also contains solid particles, therefore, causing this solid particle component to clog the meshes of the coarser graining element with fine meshes in the subsequent stage

[0005] That is, in order to increase the separation rate of the oil component, the meshes of the coarser graining elements of the second stage are formed finer, and the meshes of the coarser graining elements of the latter stage will be contained in the solid state of the water to be treated. There is a problem of limitation due to clogging of particle components

[0006] In this case, the clogging caused by the solid particle components contained in the water to be treated can be removed by filtering the water to be treated with a filter in advance to separate and remove the solid particle components. Filtration of the treated water will cause the oil contained in the treated water to rapidly block the filter element or significantly increase the filter resistance, thereby significantly hindering the filtration of the treated water

Images