Capacitor impregnant containing modified coal ash and preparation method thereof
A technology of fly ash and impregnating agent, used in capacitors, fixed capacitors, circuits, etc., can solve the problems of reducing the life performance of capacitors, capacity decay, secondary moisture of oil, etc., to achieve good fluidity and heat resistance, increase Capacitor life and effect of increasing adsorption
Active Publication Date: 2013-03-13
海门市创豪工业设计有限公司
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Problems solved by technology
[0002]At present, the impregnating agents used in capacitors are generally vegetable oils such as castor oil and salad oil, or mineral oils such as methyl silicone oil, benzyl silicone oil, and PO oil. The biggest disadvantage of the impregnating agent for capacitors is that the oil always contains some water, and during the use of the capacitor, the water will gradually invade the capacitor core, causing the thin film metal plate of the capacitor to fall off, so that the capacity decays quickly and fails, reducing If these oils are dehydrated in advance, more complicated equipment is required, and the cost is large, and it is impossible to prevent these oils from being damp again
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[0017] Example : Capacitor impregnant containing modified fly ash, the weight parts of its constituent raw materials are: dimethyl silicone oil 98, modified fly ash 3, modified tree ash 2, attapulgite 0.7, plant ash 0.8, and talc 0.7 , Fatty alcohol polyoxyethylene ether ammonium sulfate 0.4.
[0018] The preparation method of capacitor impregnant containing modified fly ash includes the following steps:
[0019] (1) Preparation of modified fly ash:
[0020] a. First roast the fly ash at 450-480°C for 3-4 hours, then soak it in a 10-12% hydrochloric acid solution for 3-4 hours, then wash it with deionized water to neutrality, and dry it;
[0021] b. Add 2-3% sodium lauryl sulfate, 1-2% chlorinated paraffin, 2-3% polyisobutylene, 3-5% magnesium oxide powder to the above-mentioned treated fly ash. , High-speed 3200-3500 rpm stirring, drying and crushing into ultra-fine powder;
[0022] (2) Preparation of modified tree ash:
[0023] a. Soak the ashes of trees with 10-15% hydrogen per...
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The invention discloses a capacitor impregnant containing modified coal ash and a preparation method thereof. The capacitor impregnant comprises the following raw materials by weight: 95-100 parts of simethicone, 2-4 parts of modified coal ash, 1 part to 3 parts of modified tree ash, 0.6-0.8 part of talcum powder, 0.3-0.5 part of fatty alcohol-polyoxyethylene ether ammonium sulfate and the like. The capacitor impregnant adopts the simethicone as a main material and is low in cost. Simultaneously, the modified coal ash, the modified tree ash, the talcum powder and the fatty alcohol-polyoxyethylene ether ammonium sulfate are added. Adsorption performance of moisture in the impregant is improved by modifying the coal ash and the tree ash. The capacitor impregant has good flowability and heat resistance, is free of corrosion and impurity, and is capable of effectively improving electric performance of a capacitor and prolonging service life of the capacitor.
Description
technical field [0001] The invention relates to a capacitor impregnating agent, in particular to a capacitor impregnating agent containing modified fly ash and a preparation method thereof. Background technique [0002] At present, the impregnating agents used in capacitors are generally vegetable oils such as castor oil and salad oil, or mineral oils such as methyl silicone oil, phenylmethyl silicone oil, and PO oil. The biggest disadvantage of using oils as impregnants for capacitors is that the oil always contains Some moisture, and during the use of the capacitor, the moisture will gradually invade the capacitor core, causing the thin film metal plate of the capacitor to fall off, so that the capacity decays quickly and fails, reducing the life performance of the capacitor. If these oils are dehydrated in advance , requires more complex equipment, costs more, and cannot prevent these oils from getting wet again. Contents of the invention [0003] The purpose of the pr...
Claims
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Inventor 宋玉春
Owner 海门市创豪工业设计有限公司