CN201848168U - Sulfur hexafluoride gas filtering and purifying device - Google Patents

Abstract

The utility model discloses a sulfur hexafluoride gas filtering and purifying device, which comprises a shell and a bottom support leg. An upper sampling valve and a gas outlet are respectively arranged on the side wall of the upper end of the shell. A lower sampling valve and a gas inlet are respectively provided, the height of the gas outlet is slightly higher than the height of the upper sampling valve, and the height of the gas inlet is slightly lower than the height of the lower sampling valve; A filter layer for removing particles, a filter layer for removing hydrofluoric acid, a filter layer for removing acidic decomposition products, a filter layer for removing sulfur hexafluoride decomposition products, a filter layer for removing oil and a filter layer for removing water are arranged in sequence. In the utility model, the height of the gas outlet is slightly higher than that of the upper sampling valve, and the height of the gas inlet is slightly lower than that of the lower sampling valve, so that the detected data is more accurate, and the purified sulfur hexafluoride gas can reach the The sulfur hexafluoride gas used in the system is recycled and reused according to the acceptance criteria, which effectively reduces the operating cost of the enterprise.

Description

Sulfur hexafluoride gas filtration and purification device

Technical field:

The utility model relates to a filtering device, in particular to a filtering and purifying device for sulfur hexafluoride gas.

Background technique:

Qualified sulfur hexafluoride gas is non-toxic and has excellent insulation and arc extinguishing properties. In recent decades, sulfur hexafluoride gas has been widely used in high-voltage electrical appliances, including high-voltage circuit breakers at all levels and some gas transformers, etc. . However, under the action of high-power arc, spark discharge and corona discharge, the internal sulfur hexafluoride gas will produce various decomposition products to varying degrees, and these decomposition products will seriously reduce the insulation performance of sulfur hexafluoride gas. Performance, threatening the safe operation of electrical equipment, some decomposition products are highly toxic substances, which will cause suffocation of maintenance personnel.

Under arc, partial discharge or other abnormal working conditions, sulfur hexafluoride is decomposed into highly active sulfur-fluorine compounds, and most of the decomposition products will immediately chemically react with other substances or impurities in the equipment to form more stable secondary decomposition products. The acidic substances in the decomposition products of sulfur hexafluoride gas, especially hydrogen fluoride and sulfur dioxide, will continue to react with water or metal oxides, which will not only make the insulation performance of sulfur hexafluoride gas continue to decline, but also seriously corrode the inner wall of the equipment, resulting in More serious equipment accidents.

Therefore, Article 7.4.7 of GB/T8905-1996 "Guidelines for Gas Management and Detection in Sulfur Hexafluoride Electrical Equipment" and my country's industry standard DL/T639-1997 "Safety Protection for Operation, Test and Maintenance Personnel of Sulfur Hexafluoride Electrical Equipment" Article 4.4.1 of the "Detailed Rules" and the provisions of the International Electrotechnical Commission (IEC) standard IEC60480-2004 all mention the recycling and reuse of sulfur hexafluoride gas, and formulate the standards to be reached after recycling.

The treatment of sulfur hexafluoride waste gas in the domestic power industry is mostly limited to recycling, and there is no equipment that can purify and regenerate it. Even if a few companies have sulfur hexafluoride exhaust gas purification devices, the purification treatment technology is immature, and the purified sulfur hexafluoride gas cannot meet the acceptance criteria for the use of sulfur hexafluoride gas in power systems, and cannot be recycled. Effectively protect the environment.

Utility model content:

The technical problem to be solved by the utility model is: to overcome the deficiencies of the prior art and provide a sulfur hexafluoride gas filtering and purifying device capable of effectively filtering out various impurities.

The technical scheme that the utility model takes for solving the technical problem is:

A device for filtering and purifying sulfur hexafluoride gas, comprising a housing and bottom legs, the upper side walls of the housing are respectively provided with an up-sampling valve and a gas outlet, and the lower side walls of the housing are respectively provided with a down-sampling valve. Valve and gas inlet, the height of the gas outlet is slightly higher than the height of the upper sampling valve, and the height of the gas inlet is slightly lower than the height of the lower sampling valve; filter layer, remove hydrofluoric acid filter layer, remove acidic decomposition product filter layer, remove sulfur hexafluoride decomposition product filter layer, remove oil filter layer and remove water filter layer.

The upper end of the housing is in a closed state.

The bottom cover and the side wall of the housing are movably connected to facilitate the replacement of the filter layer.

The beneficial effects of the utility model are:

1. The utility model is equipped with different filter layers from bottom to top, and the sulfur hexafluoride waste gas to be treated passes through these filter layers in turn to achieve the purpose of removing various impurities. The purified sulfur hexafluoride gas can meet the acceptance standard for the use of sulfur hexafluoride gas in the power system, and can be recycled and reused, effectively reducing the operating cost of the enterprise.

2. In the utility model, the height of the gas outlet is slightly higher than that of the upper sampling valve, and the height of the gas inlet is slightly lower than that of the lower sampling valve, so that the detected data is more accurate and the purified sulfur hexafluoride gas Thoroughly meet the acceptance criteria for the use of sulfur hexafluoride gas in power systems.

3. Since the bottom cover and the side wall of the housing are movably connected, the utility model can replace the failed filter layer in time, and has reasonable design, simple structure, low production cost, and considerable market and social value.

Description of drawings:

Fig. 1 is the structural representation of the utility model.

Detailed ways:

Below in conjunction with accompanying drawing, the utility model is further described:

Embodiment: See Figure 1, in the figure: 1-up sampling valve, 2-housing, 3-gas inlet, 4-particulate filter layer, 5-down sampling valve, 6-hydrofluoric acid filter layer, 7- Remove acidic decomposition product filter layer, 8-remove sulfur hexafluoride decomposition product filter layer, 9-remove oil filter layer, 10-remove water filter layer, 11-gas outlet, 12-bottom support leg.

A sulfur hexafluoride gas filtration and purification device, comprising a housing 2 and a bottom leg 12, an upper sampling valve 1 and a gas outlet 11 are respectively arranged on the upper side wall of the housing 2, and the lower side wall of the housing 2 is A lower sampling valve 5 and a gas inlet 3 are respectively arranged on the top, the height of the gas outlet 11 is slightly higher than the height of the upper sampling valve 1, and the height of the gas inlet 3 is slightly lower than the height of the lower sampling valve 5; In the inner cavity of the body 2, there are sequentially arranged a particle removal filter layer 4, a hydrofluoric acid removal filter layer 6, an acid decomposition product removal filter layer 7, a sulfur hexafluoride decomposition product removal filter layer 8, and an oil removal filter layer 9 from bottom to top. and the water-removing filter layer 10; the upper end of the housing 2 is in a closed state; the bottom cover and the side wall of the housing 2 are movably connected to facilitate replacement of the filter layer.

The sulfur hexafluoride waste gas to be treated enters from the gas inlet 3 at the lower end of the shell and flows out from the gas outlet 11 at the upper end of the shell. The material filter layer 7, the filter layer 8 for removing sulfur hexafluoride decomposition products, the filter layer 9 for removing oil and the filter layer 10 for removing moisture are used to remove impurities such as moisture, hydrofluoric acid, acid decomposition products, sulfur hexafluoride decomposition products, and oil. The upper sampling valve 1 is used to collect pretreated sulfur hexafluoride gas samples, and judge whether the pretreatment is qualified according to whether the quality of the samples meets the national fresh gas standards.

Claims (3)

1. A sulfur hexafluoride gas filtration and purification device, comprising a housing (2) and a bottom leg (12), the upper side wall of the housing (2) is respectively provided with an upper sampling valve (1) and a gas outlet (11), the lower side wall of the housing (2) is respectively provided with a down sampling valve (5) and a gas inlet (3), characterized in that: the height of the gas outlet (11) is slightly higher than the upper sampling valve (1), the height of the gas inlet (3) is slightly lower than the height of the down-sampling valve (5); the inner cavity of the housing (2) is sequentially provided with a particulate matter filter layer (4) from bottom to top ), remove hydrofluoric acid filter layer (6), remove acidic decomposition product filter layer (7), remove sulfur hexafluoride decomposition product filter layer (8), remove oil filter layer (9) and remove water filter layer (10) . 2. The device for filtering and purifying sulfur hexafluoride gas according to claim 1, characterized in that: the upper end of the casing (2) is in a closed state. 3. The device for filtering and purifying sulfur hexafluoride gas according to claim 2, characterized in that: the bottom cover of the casing (2) and the side wall are movably connected, which is convenient for replacing the filter layer.

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