Roots and dry screw vacuum system in oil deacidification

This paper deals with the field of oil deacidification processing technology, especially a vacuum device for oil refining. The following focuses on the application of roots and dry screw vacuum system in oil deacidification processing, providing reference for you. The crude oil without refining contains a certain amount of free fatty acids. The process of removing free fatty acids from oil is called deacidification. The methods of deacidification include alkali refining, distillation, solvent extraction and esterification. Among them, alkali refining and distillation are the most widely used. Distillation deacidification is also called physical refining, that is, the free fatty acids in crude oil are not neutralized by alkali, but by vacuum steam distillation. Steam jet vacuum pump is usually used in distillation deacidification process, which consumes a lot of steam, so it consumes a lot of water, and forms a large amount of waste condensate water, which makes the production site wet and hot and humid, and has potential safety risks.

The purpose of this paper is to overcome the shortcomings of the existing technology and provide a vacuum deacidification device for oil refining with good water-saving effect and good safety. The three-stage steam vacuum was used in the oil deacidification and vacuum pumping. Due to the low efficiency of steam vacuum pumping, the energy consumption of steam vacuum pumping accounted for 20% of the total energy consumption of the unit. Therefore, many companies require the replacement of mechanical equipment, and it is recommended to use roots and dry screw vacuum system instead of the original steam vacuum system.

In order to solve the above technical problems, the deacidification process of oil is realized through the following technical solutions:

A deacidification vacuum device for oil refining includes at least one set of physical refining deacidification tower; it also includes a condenser, a fatty acid catcher and a vacuum system; the upper end of the physical refining deacidification tower is connected with the inlet of the condenser through a first pipe, and the outlet of the condenser is connected with the inlet of the fatty acid collector through the second pipe; the upper end of the fatty acid collector is connected with the true through the third pipe The lower end of the fatty acid catcher is provided with a discharge pipe with a valve.

Compared with the existing technology, the application of roots and dry screw vacuum system in oil deacidification processing has the following advantages:

In the process of oil deacidification, roots and dry screw vacuum system is used to realize the vacuum treatment of deacidification tower, and the condenser and fatty acid catcher are used to realize the deacidification of oil and fat. This method is simple in process and does not produce condensate water, which can ensure that the workplace is dry and the working environment is comfortable, thus improving the safety and comfort of operation. It also has the advantages of low energy consumption, compact structure, less land occupation, safety and stability, long service life, convenient installation and maintenance, good sealing performance and large air extraction capacity.