GZL Series High Viscosity Lubricating Oil Filter



Overview

In the past, medium and small units generally used periodic pressure-type oil filters and centrifugal oil filters to remove impurities and moisture from operating oil. However, these two types of equipment are complex to operate, cause serious oil waste, and have low efficiency in removing moisture and impurities, failing to meet the operational requirements of the units.

Currently, domestic oil purification devices used for 200MW units mainly rely on sedimentation and filtration principles, with basic structures consisting of a settling tank, a filter tank, and an oil storage tank. The settling tank is equipped with multiple layers of separation mesh. Relying on the gravity difference between oil and water, water in the oil coalesces into droplets when passing through the separation mesh, settles at the bottom of the tank, and is discharged by an automatic water extractor. These oil purification devices have large design capacity and physical dimensions, and from usage, they commonly exhibit poor water removal, dirty oil, and easy clogging of the purification device. If the GZL series lubricating oil filter is adopted, it not only effectively removes gas, water, and impurities from the oil but also automatically breaks emulsions, thereby achieving true purification of the unit's lubricating oil.

Applications and Features

Applications: This machine is mainly used for lubricating oil treatment in units, capable of quickly and effectively removing moisture, gas, and impurities from the oil, improving oil quality, ensuring normal operation of the unit's regulation and lubrication systems, and extending the unit's maintenance cycle.

Features: 1. Strong ability to remove moisture and break emulsions, making it easy to separate large amounts of water from oil and also to remove trace moisture. Due to the use of a special emulsion-breaking device (water separator), turbid and emulsified oil can become clear and transparent.

2. Strong impurity filtration capability. The automatic backwashing filter element can remove large amounts of impurities from the oil, and the large-area, deep-layer precision filter media can remove fine particles, bringing even heavily contaminated oil systems back within the "Operating Turbine Oil Contamination Control Standard".

3. High degree of automation, compact and lightweight, safe and reliable, and simple to operate.

Therefore, the GZL series lubricating oil filter is particularly suitable for equipment that requires removing large amounts of water and achieving precise filtration of impurities.



Working Principle

Working Process:

Emulsified contaminated oil passes through a coarse filter to remove larger mechanical impurities. After being heated by an infrared heater to a certain temperature (controlled by an automatic thermostat), due to the different expansion coefficients of oil and water, the density difference rapidly increases, accelerating the destruction of the "water-in-oil" film. Simultaneously, heating reduces the oil's viscosity, facilitating the coalescence and settling of water droplets. The hot oil flows slowly and unloads in a buffer, then enters the centrifugal chamber below the cylindrical coalescing chamber in an eccentric manner. The slight centrifugal action only deforms the emulsion film without stirring the oil. As the binding force between oil and water decreases and their specific gravities differ, when the vortex-like oil passes through a special separation tower, fine dispersed water droplets coalesce into larger and larger droplets during settling, collecting from top to bottom under the combined action of vortex and gravity, finally settling in the bottom water storage chamber. The primarily purified oil flows through an emulsifier removal chamber to further remove colloids, soaps, and other emulsifiers, as well as some pigments. It then passes through a felt-type filter to remove moisture and adsorbent fines. Finally, it enters a vacuum separation system equipped with a special separation tower, oil level control device, and strong condensation device for vacuum separation of residual moisture. The drier oil is then discharged by an oil pump, passes through a fine filter under increased pressure, which not only filters out fine solid impurities but also breaks any remaining emulsion film, achieving supplementary separation of oil and water, resulting in clean oil.