Rapid determination of undissolved water content in jet fuel

Abstract

The invention discloses a method for quickly detecting the content of insoluble water in a jet fuel. The method comprises the following steps: at different temperatures, mixing water with the jet fuel, violently shaking, subsequently standing, layering and taking supernatant liquid for testing, and establishing a calculation formula I which expresses the variation of the content of soluble water in the jet fuel along with the change of the environment temperature according to a testing result; testing the content of the soluble water in the jet fuel under different environment humidities in a determined temperature range, and establishing a calculation formula II which expresses the variation of the content of the soluble water in the jet fuel along with the change of the environment humidity under different environment humidities according to the testing result, detecting the total water content T in a jet fuel sample to be detected, and calculating the content R of the soluble water in the jet fuel sample to be detected according to the formulas I and II so as to obtain a content F of insoluble water in the jet fuel sample to be detected, wherein F is equal to T minus R. The method has the advantages of short detection time, accurate detection result and small error and is suitable for field fast detection of the content of water in the jet fuel.

Description

technical field [0001] The invention specifically relates to a rapid determination method for non-dissolved water content in jet fuel, which is suitable for rapid on-site detection of water content in jet fuel. Background technique [0002] Jet fuel is a light petroleum product, composed of various hydrocarbons and aromatic hydrocarbons, and has a certain degree of water absorption, so it is inevitable that water will be mixed in during storage, transportation, filling and use. Moisture exists in jet fuel in two states: dissolved water and free water (non-dissolved water). When the non-dissolved water content in the fuel exceeds a certain threshold, it will directly affect the quality of the oil used and the normal operation of the flight facilities and equipment. Water content is of great significance to ensure fuel performance and flight safety. [0003] At present, the determination methods of water content in jet fuel are mainly divided into three categories: one is vi...

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Problems solved by technology

[0003] At present, the determination methods of water content in jet fuel are mainly divided into three categories: one is visual method, which has large measurement error and the accuracy of test data is not high; the other is laboratory measurement method, including solvent reflux method and Cal The Fischer method, the former also has the disadvantages of large measurement errors and low accuracy of test data. Although the latter method has accurate measurement results and good repeatability, the test preparation process is complicated, and it is not suitable for rapid determination of moisture in oil products on site. measurement; the last category is fluorescence measurement, which requires high technical requirements and takes a long time to measure, and is not suitable for on-site detection of moisture content in oil products.

[0004] Moreover, none of the aforementioned three types of determination methods can distinguish dissolved water and non-dissolved water content in oil samples, and non-dissolved water content is the most concerned index in jet fuel testing

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