| Design |
| The Hyde Tramp Oil Separator removes effectively and economically harmful tramp oils from coolant. The Hyde Tramp Oil Separator extends the fluid life and reduces the problems normally associated with tramp oil contamination. The Hyde Tramp Oil Separator will handle oil-based, semi-synthetic and synthetic coolants along with alkaline wash waters. The Hyde Tramp Oil Separator will operate on free floating,dispersed and loosely emulsified tramp oils in machine tool sumps or central systems or industrial washing machines. |
| Advantages |
• Prolongs useful life of machining and washing fluids.
• Can be fixed or mobile.
• Greatly reduces hazardous waste
• Operates in a wide temperature range.
• Minimal maintenance reduces operating costs |
| PRINCIPLES OF OPERATION WITHIN THE MEDIA BED TYPE FREE OIL SEPARATORS |
Within the media bed type separator, there are several principles that come into play and interact with one another to promote efficient accelerated separation of oil from water. The following outlines the most important of these.
The first principle is that of Stokes Law which determines the settling velocity of a particle (or rising velocity of a droplet) in a fluid of a different specific gravity. The second principle of separation is a direct result of the extremely large area of the media within the main separation chamber. Because of the higher viscosity and surface tension of the oil, the oil droplets are more readily slowed in their passage through the separator by the shear forces exerted by contact with the media surfaces. Thus small oil droplets tend to accumulate or coalesce together with other small droplets to form a larger droplet and therefore become more buoyant. They can then float to the surface of the liquid in the separation chamber from where they are automatically weird off through the skimmers.
The third principle, which is employed, is that of selected or preferential wetability. The media material is selected such that it tends to retain an affinity for hydrocarbons, this is because it is manufactured from hydrocarbon material, so it tends to attract oils and reject water. The media therefore tends to attract oil droplets and repel water and as the oil droplets accumulate on the surface of the media, they coalesce (join together) to form larger droplets. The buoyancy of these droplets eventually becomes so great that they will break free of the media and drift upwards towards the surface of the liquid in the separation chamber where they are weird from the surface.
The fourth principle of separation is that of D’Arcy’s Law, this indicates that in a media type two phase liquid separator, a mixture of liquids will not flow as quickly as either of the liquids on their own. This is termed as D’Arcy’s Law of Relative Permeability. This law shows that the liquid phase in the minority will travel at a slower rate than that of the major phase, thus when the oil phase is in a small proportion to the water phase the oil droplets slow down relative to the water phase and therefore aid separation. |
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