What can be seen in the video is the primary refining equipment, also known as full refining equipment, with dehydration, dephosphorization, acid, decolization and deodorization effect, suitable for all kinds of animal and plant gross oil, remove impurities and harmful substances in gross oil, can meet the national standard of primary oil and secondary oil standards. The equipment includes four refining tanks, multiple plate frame oil filters for fine filtration, multiple oil pumps acting on each link, oil storage tank and gross oil temporary storage tank, power distribution cabinet, and easy to view the supporting stairs inside the refining tank.