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A kind of formula and preparation method of adsorbent in trifluoroiodomethane gas switchgear

A technology of trifluoroiodomethane and gas switch, applied in separation methods, gas treatment, chemical instruments and methods, etc., can solve the problems of corrosion of internal components, affecting the normal operation of switchgear, etc., and achieve the effect of high adsorption efficiency

Active Publication Date: 2019-03-19
NANJING NARI GROUP CORP +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after working for a long time, the new type trifluoroiodomethane gas switchgear will produce a small amount of iodine element along with the decomposition of trifluoroiodomethane. There are solid insulating parts such as polyvinyl chloride in the switchgear, and breakdown discharge occurs when there is a fault. Gaseous elemental iodine and acid halides will also be produced when the gaseous iodine element and acid halide exist. If the elemental iodine and acid halide exist in the box for a long time, it will cause corrosion to the internal components and seriously affect the normal operation of the switchgear.
At present, there is no adsorbent formula that can simultaneously adsorb water, elemental iodine and acid halide in the switchgear on the market

Method used

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  • A kind of formula and preparation method of adsorbent in trifluoroiodomethane gas switchgear
  • A kind of formula and preparation method of adsorbent in trifluoroiodomethane gas switchgear

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Dissolve 1g of potassium iodide in 0.7ml of water, 0.5ml of boiling water, 22ml of ethanol, 8ml of boiling ethanol, 51ml of absolute ethanol, 8ml of methanol, 7.5ml of acetone, 2ml of glycerin, and about 2.5ml of ethylene glycol. Fully soak the cyclodextrin in saturated potassium iodide solution, filter out the filter cake, and let it stand and dry at room temperature for 48 hours. Mix 10 g of the cyclodextrin treated above with 80 g of silica gel desiccant and 10 g of calcium oxide powder to obtain the required adsorbent.

Embodiment 2

[0029] Dissolve 2g of potassium iodide in 0.5ml of water, 0.5ml of boiling water, 30ml of ethanol, 10ml of boiling ethanol, 40ml of absolute ethanol, 5ml of methanol, 5ml of acetone, 3ml of glycerin, and 3ml of ethylene glycol. Fully soak the cyclodextrin in saturated potassium iodide solution, filter out the filter cake, and let it stand and dry at room temperature for 48 hours. Mix 20 g of the cyclodextrin after the above treatment with 60 g of silica gel desiccant and 20 g of calcium oxide powder to obtain the required adsorbent.

Embodiment 3

[0031] Prepare 3 identical airtight test chambers, fill in the trifluoroiodomethane gas and the nitrogen gas mixture that contains slight water in the chamber 1, add the adsorbent prepared in Example 1 in the chamber 2 and fill it with the chamber 1 Body composition gas, the adsorbent prepared in Example 2 is added to the box body 3 and filled with the gas of the box body composition of the box body 1, after standing for 5 hours, the water content in the box body 1 measured by a micro-water measuring instrument is about 60ppm, the water content in box 2 is about 10ppm, and the water content in box 3 is about 10ppm, which shows that the two kinds of adsorbents can effectively absorb the water vapor in the box.

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Abstract

The invention relates to the field of adsorbents and particularly relates to a formula of an adsorbent in an iodotrifluoromethane gas switch cabinet and a preparation method thereof. The formula is prepared by mixing the following components according to certain proportions: a silica-gel drier, cyclodextrin, potassium iodide, water, ethanol, methanol, acetone, glycerin, ethylene glycol and calcium oxide. The adsorbent provided by the invention can be efficiently and widely applied to iodotrifluoromethane gas switch cabinet equipment, can adsorb the moisture, iodine and acid halide in the switch equipment at high adsorption efficiency, and can effectively delay corrosion of electrical elements such as buses, cables and solid insulators in the switch cabinet while preventing solid decomposition products such as iodine from being adhered to electrical elements and influencing the normal operation of the equipment.

Description

technical field [0001] The invention relates to the field of adsorbents, in particular to a formulation of the adsorbent in a trifluoroiodomethane gas switch cabinet and a preparation method thereof. Background technique [0002] In recent years, in the field of gas insulated switchgear, a new type of environmentally friendly insulating gas trifluoroiodomethane (CF3I) is widely considered to be one of the most likely to replace SF6 due to its excellent electrical properties and physical and chemical properties. The adsorbent of the traditional SF6 gas switchgear is mainly for moisture-proof design, the main component is silica gel, which is used to absorb the moisture in the switchgear, keep the switchgear dry, and prevent the busbars, cables and solid insulation parts in the switchgear from contact with water. Corrosion and other chemical reactions occur in contact with gas. However, after working for a long time, the new type trifluoroiodomethane gas switchgear will produ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/24B01D53/26B01D53/02B01J20/30
CPCB01D53/02B01D53/261B01D2257/2068B01J20/041B01J20/046B01J20/103B01J20/22B01J20/24
Inventor 薛健蔡凡一周柏杰
Owner NANJING NARI GROUP CORP