Re-purification method of in-use heat treatment oil

Abstract

The invention discloses a re-purification method of in-use heat treatment oil. The re-purification method comprises four working procedures of heating sedimentation, electrostatic flocculation sedimentation, filtration and additive supplement, and is characterized in that by re-purification treatment according to the four working procedures of heating sedimentation, electrostatic flocculation sedimentation, filtration and additive supplement, a large amount of impurities, moisture, colloid particles and suspended substances in the heat treatment oil can be removed, and the service performanceof the heat treatment oil can be restored. According to the re-purification method of the in-use heat treatment oil, the traditional flocculation and sedimentation process is replaced by the electrostatic flocculation and sedimentation process, so that the usage amount of a flocculant can be reduced, the flocculation efficiency can be improved, the waste oil discharge can be reduced, oil resourcescan be saved, and the advantages are obvious.

Description

technical field [0001] The invention relates to the technical field of repurification of heat-treated oil, in particular to heating sedimentation, electrostatic polymerization, flocculation, centrifugal filtration and pressure filtration technologies. Background technique [0002] The working nature and working environment of heat treatment oil determine that it is more easily polluted than other lubricating oils, and the impurity content increases very quickly. A large amount of oxides, free carbon and dust attached to the surface of the metal workpiece during heat treatment, as well as pollutants such as iron scraps during the previous processing, are brought into the heat treatment oil, causing the kinematic viscosity of the oil to increase and the carbon residue to increase. , The cooling performance is reduced, and the leakage of the cooling water is mixed with the oil due to the local rupture of the cooler, which reduces the service performance of the rapidly polluted ...

AI Technical Summary

Problems solved by technology

The impurity content in the heat-treated oil is very high, and it is easy to block the filter element with the conventional filtering method, and the effect is not good; and due to the existence of the cleansing and dispersing agent in the heat-treated oil, the colloid, carbon deposits and other substances generated during the use of the heat-treated oil are removed The tiny particles of the ingredients are dispersed in the oil to form a dispersed phase suspension with very small particles. They can pass through the pores of the filter material and cannot be separated by gravity or centrifugal force. They can only rely on a large amount of flocculant to settle after flocculation