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Method for oscillated extraction of furfural components from insulated oil

A technology of insulating oil and furfural, applied in the field of power transmission and transformation, can solve the problems of cumbersome extraction process, and achieve the effect of simple and fast operation and stable extraction rate

Inactive Publication Date: 2011-09-07
青海电力科学试验研究院
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Problems solved by technology

Since this method requires the purchase of a centrifugal separator and the extraction process is cumbersome, it is necessary to innovate the furfural extraction method using the existing transformer oil analysis equipment

Method used

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Experimental program
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Embodiment 1

[0018] The essence of the extraction of substances is the dissolution equilibrium of the extracted substance in two mutually insoluble substances in a certain state. In this case, according to the principle of the dissolution equilibrium analysis method, the oscillation of the oscillator is the dissolution equilibrium. The research on the vibration extraction method of furfural components, its specific working method is as follows:

[0019] Oscillator:

[0020] Reciprocating oscillation frequency 275 times / min±5 times / min; amplitude 35mm±3mm.

[0021] Glass syringe:

[0022] 100ml, 5 ml medical glass syringes, good airtightness, flexible plunger and no sticking.

[0023] Stainless steel injection needles: No. 7 metal medical injection needles.

[0024] Rubber cap for syringe: good elasticity, airtight.

[0025] Filter membrane:

[0026] ф40, 0.45μm oily filter membrane;

[0027] 0.45μm needle-type oily filter membrane.

[0028] drug

[0029] Methanol: special reagent f...

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Abstract

The invention relates to the technical field of power transmission and transformation, in particular to a method for oscillated extraction of furfural components from insulated oil of a power transformer. The method comprises the following steps of: 1) extracting about 50mL oil samples from a 100mL medical glass needle tube and adjusting the volume of the oil samples to 40mL; 2) adjusting a 100mL medical glass needle tube to maintain a 10mL space, adding 5.0mL alcohol, performing oscillation extraction, and detecting furfural, wherein time for the balance of the oscillation extraction is more than or equal to three minutes, and temperature for the extraction is less than or equal to 30 DEG C. Based on the oscillation theory, the method is simple and fast in operation and stable in extraction rate and accords with the requirement of quantitative analysis, and lays a solid foundation for subsequent instrument analysis and evaluation on paper insulation aging and insulation service life of a transformer.

Description

technical field [0001] The invention relates to the technical field of power transmission and transformation, in particular to an oscillating extraction method for furfural components in insulating oil of power transformers. Background technique [0002] The paper insulation of power transformers is subjected to the joint action of heat, moisture, oxygen, and acidic compounds in oil during operation. Cellulose will crack and degrade to produce some oxygen-containing heterocyclic compounds. Furfural is a kind of cellulose macromolecule degraded. The main oxygen heterocyclic compound. The most reliable way to judge the aging of paper insulation is to measure its degree of polymerization, but this method is difficult to sample and can only be carried out when the transformer is overhauled. Foreign countries have adopted a more practical method for judging the aging of transformer paper insulation - high performance liquid chromatography (HPLC) furfural content analysis metho...

Claims

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Application Information

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IPC IPC(8): G01N1/34C07D307/48
Inventor 路自强郑勇李玉海张晖王献敏
Owner 青海电力科学试验研究院
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