System and method for automatically detecting oleic acid value

Abstract

The invention discloses a system and method for automatically detecting the oleic acid value. The method includes the steps that firstly, oil samples to be detected are added into a titration pool, then an extraction solvent and a temperature indicating agent are injected into the titration pool through quantitative pumps respectively, solutions in the titration pool are fully mixed through a magnetic stirrer, and a temperature sensor in the titration pool ceaselessly measures the temperature of mixed liquid in the titration pool; secondly, titration reagents are injected into the titration pool through a third metering pump, and the magnetic stirrer performs continuous stirring; thirdly, a signal processing device connected with the temperature sensor is used for displaying heat absorbed in reaction and heat released in reaction in real time, the number of the consumed titration reagents is determined through reaction inflection points, and the acid value of the oil samples to be detected is calculated through the consumption of the titration reagents. According to the system and method, the method for automatically detecting oleic acid in a non-aqueous solution is put forwards at the first time, the acid value of oil products can be fast measured, measurement of one oil sample can be completed within 3 min or so, manpower is greatly saved, and high economic value is achieved.

Description

technical field [0001] The invention relates to a system and method for automatic detection of oleic acid value. Background technique [0002] Oil-filled electrical equipment such as transformers is an important core equipment in power system substations, and its reliable and safe operation is very important. Once a failure occurs, it will directly affect the safe and stable operation of the power grid. The transformer oil used in the power system refers to a type of insulating oil that is suitable for oil-filled electrical equipment such as transformers, reactors, transformers, bushings, oil switches, etc., and plays the role of insulation, cooling and arc extinguishing. Quality supervision is the prerequisite to ensure the safe operation of oil-filled electrical equipment. [0003] During the operation of transformer oil, due to the influence of air, temperature, electric field, friction and other factors, the oil will be gradually oxidized to produce acidic substances. ...

AI Technical Summary

Problems solved by technology

[0004] At present, the indicator method and potentiometric titration method are mainly used in the determination of the acid value of oil used in electric power in my country. For many years, acid value measuring instruments based on these two methods have played a considerable role in the monitoring and maintenance of oil used in electric power. Obvious disadvantages: The acid value measuring instrument of the indicator method needs to be heated and refluxed, which is time-consuming and troublesome, and the solution is easily invaded by carbon dioxide during the titration process, which affects the measurement results, and the color mutation of the titration end point is also easy to cause errors due to subjective judgments

Chinese patent 200910029709.3 discloses a rapid determination method of lubricating oil acid value temperature titration, but this method needs to be operated manually in the laboratory, which is time-consuming and laborious, with large errors and low repetition rate, which is not conducive to popularization

Images