On-line detection system and method of trace dissolved gas in organic oil

Abstract

The invention discloses an on-line detection system and method of trace dissolved gas in organic oil, characterized in that: a polymer degassing film with short oil-gas balance time is used, thus the structure is simple, and degasification speed is fast; the trace dissolved gas in organic oil is separated through the dual column chromatography, thus the number of channels of traditional chromatograph is simplified; the unique twelve-way valve structure is used, and double chromatographic columns are arranged, thus the system works respectively alternately in states of reflux and sample injection, and the problem of difficult separation of O2 and CO gas existing in the traditional chromatographic system is effectively solved; a trace flammable gas detection sensor produced by using a solid oxide fuel cell technique can simultaneously detect 7 kinds of dissolved gases in organic oil with high detection accuracy and good separating degree of different component gases, and the number of gas sensor in the system is reduced. According to the invention, an oil-gas separation, a gas separation detection unit and a control unit are combined together, thus the volume of the system device is reduced, the stability of the system is increased, and the system is convenient for installation and maintenance.

Description

technical field [0001] The invention relates to an online detection system and method for trace amounts of dissolved gas in organic oil, in particular to an online monitoring of the dissolved gas content and change trend in oil during operation of ultra-high voltage three-phase integrated transformer oil or aeroengine lubricating oil A highly integrated online detection system and detection method for dissolved gas in organic oil and alarm. Background technique [0002] Many large-scale equipment, such as high-voltage and ultra-high-voltage transformers, aviation engine lubrication, etc., use organic oil for cooling and insulation. Due to overheating, electrical discharge, and their own hydrocarbon structure, these organic oils will produce combustible gases such as H 2 , CO, C 2 h 2 gas dissolved in oil. Moreover, the amount and composition of these gases directly reflect the health status of these large-scale equipment. For example, the current transformer fault diagno...

AI Technical Summary

Problems solved by technology

In the past, there were problems in the online detection system of trace dissolved gas in oil, such as bulky system equipment, few types of dissolved gas in oil, long oil and gas equilibrium time, poor separation effect of dissolved gas, and insufficient detection accuracy of dissolved gas.

[0003] At present, the ordinary polymer degassing membrane oil-gas equilibrium time is long; the separation degree of each gas component in the traditional chromatographic system is small, resulting in the problem that O2 and CO gas are difficult to separate; for the detection of multi-component gases, the thermal conductivity method is mainly used. Sensors, hydrogen flame ionization sensors, semiconductor sensors, etc.

The main disadvantage of the thermal conductivity sensor is that the minimum detection limit is too large, and it needs flammable pure hydrogen as a carrier, which increases the risk of application; the hydrogen flame ionization sensor can detect too few types of gases; the semiconductor sensor has a long response time and is prone to smear

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