Factory waste oil purification method

Factory waste oil purification is an important part of resource recovery and environmental protection. Common purification methods include:

1. Physical purification method

- Sedimentation method: Separate solid impurities and water in oil by gravity.

- Centrifugal separation: Use centrifugal force to separate solid particles and water in oil.

- Filtration method: Use filter element or filter to remove solid impurities.

2. Chemical purification method

- Acid washing method: Use sulfuric acid or hydrochloric acid to remove metal impurities and colloids in oil.

- Alkaline washing method: Use sodium hydroxide solution to neutralize acidic substances in oil.

- Adsorption method: Use activated clay or activated carbon to adsorb impurities and pigments in oil.

3. Thermal purification method

- Distillation method: Evaporate water and light impurities in oil by heating, and then condense and recover.

- Vacuum dehydration: Heat under vacuum conditions to remove water and gas in oil.

4. Electrical purification method

- Electrical purification method: Use electric field to separate tiny particles and water in oil.

5. Biological purification methods

- Biodegradation: Use microorganisms to decompose organic pollutants in oil.

6. Combined purification methods

- Multi-stage purification: Combine multiple methods, such as precipitation first, then filtration, and finally adsorption, to achieve better purification effects.

7. Equipment purification

- Oil filter: Use centrifugal, vacuum or plate and frame oil filter for efficient purification.

- Oil-water separator: Specially used to separate water from oil.

8. Environmental protection treatment

- Waste oil recovery: Recycle and reuse the purified oil.

- Waste residue treatment: Properly handle the waste residue generated during the purification process to avoid secondary pollution.

9. Automated control

- Automated system: Use automated control systems to improve purification efficiency and safety.

10. Regular maintenance

- Equipment maintenance: Regularly maintain purification equipment to ensure its normal operation.

- Oil quality monitoring: Regularly monitor oil quality and adjust the purification process in time.

11. Safety measures

- Fire and explosion prevention: Pay attention to fire and explosion prevention during the purification process to ensure safety.

- Personal protection: Operators need to wear protective equipment and avoid contact with harmful substances.

Through the above methods, the factory can effectively purify waste oil, realize resource reuse, and reduce environmental pollution.