What is the function of the oil filter installed on the waste oil burner

The primary function of the oil filter installed in a waste oil burner is to purify the fuel (waste oil), ensuring stable and efficient operation of the burner while extending the equipment's service life. Specific functions are as follows:

1. Core Functions

• Filter Solid Impurities
  Removes metal debris, carbon particles, food residues, etc. (common in cooking waste oil) to prevent clogging of the fuel nozzle or wear on the oil pump.

• Separate Water
  Uses oil filter media adsorption or centrifugal force to remove free water from waste oil, avoiding combustion instability caused by water vaporization (which may lead to explosive combustion).

• Intercept Viscous Residues
  Filters sticky residues formed by high-temperature oxidation, preventing coking in the combustion chamber.

2. Key Protected Components

3. Oil filter Types & Selection Guide

(1) Primary Oil Filter (Pre-Filtration)

• Mesh Size: 100-150μm (stainless steel mesh)

• Location: Oil tank outlet

• Application: Waste oil with large particles (e.g., gutter oil)

(2) Fine Oil Filter (Main Filtration)

• Oil Filter Media: Glass fiber/ceramic

• Filtration Precision: 10-25μm

• Location: Before the oil pump

• Mandatory Use: For biodiesel or finely recycled oil

(3) Magnetic Oil Filter (Optional)

• Uses strong magnets to adsorb iron particles, suitable for waste oil containing metal wear debris.

4. Maintenance Guidelines

• Replacement Cycle:

  • Light waste oil (e.g., vegetable oil): Every 500 operating hours

  • Heavy waste oil (e.g., engine oil): Every 200 operating hours

  • Immediate replacement required if pressure drop alarm exceeds 0.3MPa

• Cleaning Methods:

  • Metal mesh: Ultrasonic cleaning with diesel (28kHz frequency)

  • Paper filter elements: Non-reusable

5. Symptoms of Oil Filter Failure

• Ignition delay >5 seconds

• Flame turns red (normal: bright blue)

• Increased oil pump noise (caused by insufficient flow due to clogging)

Recommendation:

• Install a transparent inspection window after the oil filter for regular oil cleanliness checks.

• For high-viscosity waste oil (e.g., animal fat), preheat to 60-80°C before filtration.