Degreasing is also called degreasing. Refers to the method of removing grease from wastewater, sludge or solid waste. The equipment for separating grease from wastewater includes oil separation tank and oil removal tank. In addition, it also refers to the process of removing grease from the surface of machine parts or iron products. Grease mainly comes from lubricating oil and antirust oil during processing, oil seal during storage, mold release agent during molding and polishing paste during polishing. Degreasing methods include organic solvent degreasing, chemical degreasing and electrochemical degreasing. Sometimes it is necessary to use several methods at the same time.