How to do anticorrosion and derusting work for large storage tank? Generally speaking, for oil storage tanks, all kinds of storage tanks are welded to the shell first to check the safety performance of pressure vessel equipment, and then derusting treatment is carried out. The traditional derusting method is slow in manual grinding, and the cleaning effect is not good, so the dry sand blasting machine is generally used to sand and derusting, because the dry sand blasting will produce certain dust, and the working site is limited, so it is more environmentally friendly at present The methods are dry sand blasting in the tank and water sand blasting in the outer wall.
Dry sand blasting is often called sand blasting. It takes the high pressure compressed air of the air compressor as the power to spray abrasive (quartz sand, emery or river sand) to the surface of the workpiece through a special nozzle (nozzle) at a high speed. With the help of the impact force, cutting force and friction force of abrasive, the coating and rust layer can be removed efficiently.
Water sand blasting is different from dry sand blasting. Water sand blasting is to mix sand and water in the tank, and spray water and sand together through compressed air. Because of the existence of water, 98% of dust pollution can be suppressed, and there is no spark and other safety hazards during operation! By adding antirust powder or antirust agent, the time of oil tank surface rust can be prolonged! More favorable with later spraying!