Vacuum oil purifier vacuum tank oil foam more reasons

Writer： Kaiqian Oil Purifier Release time：2025-03-04 17:36 Clicks：

During the operation of the vacuum oil purifier, a large amount of oil foam in the vacuum tank is one of the common problems. Too much oil foam will not only reduce the dehydration efficiency, but also may block the pipeline, damage the vacuum pump, and even affect the oil purification effect. This paper will start with the principle and operation details of the equipment, analyze the root cause of the oil foam, and provide practical solutions.

First, the oil foam in the vacuum tank is harmful to the equipment

Reduce purification efficiency: the oil foam occupies the space in the tank, reducing the contact area between the oil and the vacuum, resulting in incomplete removal of water and gas.

Increase equipment load: foam into the vacuum pump will aggravate pump body wear, shorten equipment life.

Contamination risk: Oil droplets carrying impurities are easily attached to the surface of the filter element, resulting in frequent clogging.

Second, the five major causes of oil foam and countermeasures

1. The oil viscosity is too high or contains too many impurities

Reason: high viscosity oil (such as aging gear oil) in vacuum environment poor fluidity, easy to form foam; Impurities (such as metal particles, gum) can destroy the surface tension of the oil.

The solution:

Pretreatment oil: first through the plate and frame oil purifier or centrifuge to remove large particles of impurities;

Heating to reduce viscosity: Start the heating function of the oil filter and control the oil temperature at 40-60 ° C (adjusted according to the oil type).

2. The vacuum is too high or fluctuates violently

Reason: the vacuum degree exceeds the design value of the equipment (such as < -0.095MPa), and the oil boils violently to produce foam; Vacuum system leakage causes pressure instability.

The solution:

Adjust the vacuum valve: stabilize the vacuum degree in the range of -0.08 ~ -0.094MPa;

Check the tightness: replace the tank seal ring regularly and repair the leakage point of the pipeline interface.

3. Oil circulation speed is too fast

Reason: the oil flow is too large, the oil stays in the tank is insufficient, and it is discharged without sufficient defoaming.

The solution:

Reduce the frequency of oil pump and extend the degassing time of oil in vacuum tank;

Add a buffer baffle or extend the guide tube in the tank to slow down the impact of oil flow.

4. Defoaming device failure or design defect

Cause: deformation of the mechanical defoamer, insufficient power of the ultrasonic defoamer, or no defoamer structure in the tank.

The solution:

Upgrade defoaming components: "mechanical baffle + ultrasonic" composite defoaming technology;

Regularly clean the oil dirt on the surface of the defoaming board to prevent clogging.

5. Oil additives volatilization or emulsification

Reason: Some lubricating oil contains volatile additives (such as anti-wear agent), accelerated precipitation under vacuum environment; Mixing of oil and water leads to emulsification and foaming.

The solution:

Control heating temperature to avoid high temperature decomposition of additives;

Add the demulsifier filter to separate the emulsified oil-water mixture.

3. Preventive suggestions in daily operation and maintenance

Regular monitoring of oil status: use viscometers and moisture testers to detect oil abnormalities in advance.

Standard operation process: Gradually increase the vacuum degree when starting the device to avoid the impact of instantaneous high pressure difference.

Select an adaptive oil purifier: For high foam oil, the vacuum oil purifier model with a two-stage defoaming bin is preferred.

Fourth, technology upgrade plan: efficient defoaming system recommendation

For the problem of stubborn oil foam, the following configurations can be selected:

Infrared oil level monitoring: automatically adjust the oil intake to prevent foam overflow caused by high liquid level;

Nano-ceramic defoaming layer: the defoaming material is sprayed on the inner wall of the vacuum tank to physically destroy the foam structure;

Intelligent control system: real-time linkage heating, vacuum and circulation modules, dynamic optimization of defoaming efficiency.

Excessive oil foam in the vacuum oil purifier tank is often the comprehensive result of equipment parameter imbalance, abnormal oil status or insufficient maintenance. Through scientific analysis of the reasons and taking targeted measures, the stability and purification effect of the equipment can be significantly improved. KAIQIAN OIL PURIFIER manufacturers provide professional oil foam problem diagnosis services, and supply a full range of defoaming vacuum oil purifier equipment, welcome to call +86013983031725 for free technical solutions!