Slack wax refining equipment

Slack wax refining equipment

slack wax refining equipment is equipment for petroleum refining. One of the important methods for refining petroleum products is the process of diluting and freezing lubricating oil raw materials through solvents to crystallize the wax in them, thereby lowering the freezing point of the lubricating oil. Industrially, the lubricating oil obtained from the waxy crude oil through crude oil distillation is fractionated. After solvent refining, lubricating oil solvent dewaxing and hydrogenation refining, the lubricating oil base oil ring and paraffin can be made into lubricating oil base oil rings and paraffin. Pressure residue oil is used as raw material and can be made into lubricating oil base oil) and ozokerite through solvent deasphalting, solvent refining, ketone benzene dewaxing and hydrorefining processes.

Among them, ketone-benzene dewaxing is an extremely important link. The ketone-benzene dewaxing device is divided into 4 systems: ① The basic task of the crystallization system is to form good wax crystals. The difference in solubility of oil and wax in the ketone-benzene solvent in the dewaxing raw material is used to cool down and gradually form the wax. Crystals precipitate, thus creating conditions for oil and wax separation; ② The basic task of the refrigeration system is to ensure product quality and provide necessary cooling capacity. Ammonia is used as the refrigerant, and liquid ammonia vaporizes and absorbs heat at low temperatures to cool and dewax. Raw materials and solvents, liquid ammonia vaporizes after absorbing heat, and is compressed into high-pressure gas ammonia by the refrigerator. It is liquefied after being condensed by dry and wet air cooling, and then the liquid ammonia is throttled into the evaporator for recycling; ③ The basic task of the vacuum filtration system is to complete the oil Wax separation and inert gas sealing are provided to the container and vacuum filter. According to the wax content of the raw material, one or two stages of filtration are used to recover the solvent from the filtrate and wax liquid. Multi-effect evaporation and stripping are used to reduce energy. Consumption. In addition, the inert gas protection system can effectively reduce solvent loss and explosion protection to ensure safe production.