Accurate and simple transformer oil acid value detection method

A transformer oil and detection method technology, which is applied in the direction of material analysis by observing the influence of chemical indicators, and analysis by making materials undergo chemical reactions, can solve the problems of easy carbon dioxide intrusion, cumbersome operation steps, and complicated experimental equipment. , to achieve the effect of saving heating and reflux operation, less dosage and simplifying operation steps

Inactive Publication Date: 2012-10-17
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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Problems solved by technology

[0009] Obviously, there are obvious deficiencies in the above operation process: the solvent treatment process needs to be heated and refluxed for 5 minutes, and the sample preparation process also needs to be heated and refluxed fo

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  • Accurate and simple transformer oil acid value detection method
  • Accurate and simple transformer oil acid value detection method
  • Accurate and simple transformer oil acid value detection method

Examples

Experimental program
Comparison scheme
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Example Embodiment

[0052] Example 1

[0053] Experimental material: No. 25 transformer oil produced by Sinopec Gaoqiao Petrochemical Company, an industrial product, is a high-pressure hydroisomerization oil. The oil has undergone aging treatment.

[0054] Experimental method: an accurate and simple method for detecting the acid value of transformer oil (this invention)

[0055] Experimental operation: 1) Accurately measure 4.0mL of transformer oil to be tested, and accurately weigh it. Add 25mL isopropanol, shake well, add 0.15mL alkaline blue 6B indicator dropwise to obtain a mixed solution, titrate with 0.05mol / L KOH ethanol solution until the color of the mixed solution turns light red.

[0056] 2) Blank solvent detection

[0057] Measure 25 mL of isopropanol, add 0.15 mL of alkaline blue 6B indicator dropwise to obtain a mixed solution, and titrate with 0.05 mol / L KOH ethanol solution until the color of the mixed solution turns light red.

[0058] 3) Calculation

[0059] The formula for calculating t...

Example Embodiment

[0074] Example 2

[0075] Experimental material: No. 25 naphthenic transformer oil produced in Karamay, industrial product. The oil has undergone aging treatment.

[0076] Experimental method: an accurate and simple method for detecting the acid value of transformer oil (this invention)

[0077] Experimental operation: 1) Accurately measure 4.0mL of transformer oil to be tested, and accurately weigh it. Add 25mL isopropanol, shake well, add 0.15mL alkaline blue 6B indicator dropwise to obtain a mixed solution, titrate with 0.05mol / L KOH ethanol solution until the color of the mixed solution turns light red.

[0078] 2) Blank solvent detection

[0079] Measure 25 mL of isopropanol, add 0.15 mL of basic blue 6B indicator dropwise, and titrate with 0.05 mol / L KOH ethanol solution until the color of the mixed solution becomes light red.

[0080] 3) Calculation

[0081] The formula for calculating the acid value of transformer oil is as follows:

[0082] c(mgKOH / g) = (V-V 0 ) × c(KOH) × M(KO...

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Abstract

The invention relates to an accurate and simple transformer oil acid value detection method. The method comprises the steps of: (1) oil sample detection, (2) blank solvent detection, and (3) calculation. In the step (1), 3.0-4.0g of transformer oil requiring detection is accurately weighed; an extractant isopropyl alcohol is added to the sample; the mixture is well mixed by shaking; an alkali blue 6B indicating agent is dropped into the mixture, such that a mixed solution is obtained; 0.05mol/L of a KOH ethanol solution is used for titration, until the color of the solution turns to light red. In the step (2), the extractant with a volume same as that used in the step (1) is weighed; the alkali blue 6B indicating agent is dropped into the extractant, such that a mixed solution is obtained; 0.05mol/L of a KOH ethanol solution is used for titration, until the color of the solution turns to light red, such that the titration reaches an end. In the step (3), the calculation is carried out according to the formula of: c(mgKOH/g)=(V-V0)*c(KOH)*M(KOH)/m. The method provided by the invention is simple and fast. With the method, heating and refluxing are not needed, such that working efficiency is improved. Twice titration is changed into once titration, such that the operation processes are simplified, and operation errors of the system are reduced.

Description

technical field [0001] The invention relates to the quality detection of industrial oil products, in particular to a detection method for the acid value of transformer oil. Compared with the traditional method, the method is simple and accurate. Background technique [0002] Transformer oil is an important mineral liquid insulating medium in the power system, which mainly plays the role of insulation, heat dissipation and cooling, and arc extinguishing. They are like the blood in the machine, and their quality directly affects the safe and economical operation of hair and power supply equipment. Transformer oil works for a long time in the state of oxygen, heat and strong electric field, and it will gradually age during operation, which will increase the acidic substances in the oil. The acidic substances in the transformer oil increase the conductivity of the oil, reduce the insulation performance of the oil, and at the same time promote the aging of solid fiber insulatio...

Claims

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Application Information

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IPC IPC(8): G01N21/79
Inventor 钱艺华苏伟陈天生钟振声黄溢彬吴海燕付强卢国华
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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