Comparison of dehydration principles between Coalescing oil purifiers and vacuum oil purifiers!

Writer： Kaiqian Oil Purifier Release time：2025-06-17 17:47 Clicks：

In the field of industrial oil purification, the efficient removal of water is the key line of defense to ensure the long-term operation of equipment. Polymerization oil purifier and vacuum oil purifier as the two main technologies, its dehydration mechanism and application scenarios are very different. In-depth understanding of the core differences between the two, in order to provide accurate basis for equipment selection.

First, the core principle of dehydration: physical interception vs. phase change separation

Agglomerated oil purifier - water droplets of the “fusion”:

-The core weapon is the agglomerated cartridge (special treatment of glass fiber or polymer materials). Workflow:

1. Diffusion adsorption: hydrophilic materials actively capture tiny water droplets.

2. Aggregation and merger: tiny water droplets collide and aggregate into large water droplets.

3. Settling separation: large water droplets settle to the bottom of the tank

Nature: physical separation, for free water and large emulsified water

Vacuum oil purifier - water “boiling” evaporation:

-The core is to create a vacuum negative pressure environment:

1. Vacuum flash evaporation: reduce the pressure so that the boiling point of water drops significantly

2. Heating assistance: moderate heating to promote low-temperature vaporization of water

3. Vacuum removal: water vapor is quickly removed by the vacuum system

4. Depth interception: Precision purifier element captures residual impurities.

Essence: physical phase change (liquid → gas), can remove free water, dissolved water and stubborn emulsified water

Second, the key capabilities and application scenarios differences

Processing objects:

-Agglomeration: free water, large emulsified water

-Vacuum: free water, dissolved water, deeply emulsified water

Dehydration depth

-Agglomeration: superior (large amount of free water)

-Vacuum: excellent (trace dissolved water/emulsified water)

Processing speed

-Agglomeration: Fast (physical agglomeration and settling)

-Vacuum: slower (dependent on phase change and vacuum pumping speed)

Influence of oil temperature

-Agglomeration: small

-Vacuum: heating required (need to prevent aging of oil)

Typical applications

-Agglomeration: water ingress in hydraulic systems, free water in oil tanks, turbine lubrication systems

Vacuum: Transformer insulating oil drying, turbine oil precision purification, ultra-low water content lubrication system

Third, the actual selection guide

Selection of aggregation timing

-Emergency treatment of large amounts of free water (such as rainwater mixing)

-Need to quickly reduce the water content

-Oil is sensitive to high temperature

Select vacuum timing

-Require ppm water content (transformer oil, etc.)

-Presence of dissolved water/stubborn emulsified water

-Pursuit of extreme dewatering depth

Agglomerated oil purifier and vacuum oil purifier is a complementary tool for industrial oil purification, according to the needs of the equipment and the precise choice of pollution conditions, in order to maximize the efficiency of resources - when the oil has become the lifeblood of the equipment, the correct dewatering method is the most solid guarantee of efficient production.