CN111359367A - SF (sulfur hexafluoride)6Gas micro-water treatment device - Google Patents

Abstract

The invention provides an SF ₆ gas micro-water treatment device, comprising a first joint connected in series through a gas pipe, a first moisture measuring instrument, a first pressure gauge, a manual valve, a gas flow meter, a filtering mechanism, a drying mechanism, and a gas compression mechanism. unit and second connector. The invention provides an SF ₆ gas micro-water treatment device, which can realize the cyclic treatment of moisture and decomposition products in SF ₆ gas by setting up a series structure, which can not only ensure that the SF ₆ gas in the equipment is always in a stable range, but also better It can protect the circuit in the equipment, and can also be connected with the equipment for a long time to realize real-time treatment, and the moisture and decomposition products can be treated at any time, avoiding the hidden risks caused by the lag in the treatment of the existing technology.

Description

A kind of SF6 gas micro water treatment device

technical field

The invention belongs to the field of electrical equipment, in particular to an SF ₆ gas micro-water treatment device.

Background technique

SF ₆ gas is a stable inert compound with excellent insulating and arc extinguishing properties, and is widely used in power system equipment.

SF ₆ gas contains impurities such as air and moisture. Under certain conditions, such as arc and spark discharge, the fluorine-sulfur compounds produced by electrolysis can react with water to form highly corrosive chemicals, including SO ₂ and H ₂ S. , it will corrode metal parts and insulating materials, shorten the service life of equipment, and affect the purity of SF ₆ gas and its electrical properties. Moreover, excessive moisture will condense on the surface of the solid medium, and flashover will occur after the equipment is running, and even an explosion may occur in severe cases. Therefore, the micro-water test, as a must-test item for SF ₆ electrical equipment, has been widely paid attention to.

The Chinese patent with the publication number CN106000022B provides an on-line micro-water treatment method for SF ₆ electrical equipment, which enables the SF ₆ electrical equipment to perform non-stop maintenance by circulating and drying the gas in the gas chamber of the SF ₆ electrical equipment and filtering the decomposed products. and its processing device, but the inlet and outlet of the device share a joint, which makes the process of extracting SF ₆ gas from the equipment and backfilling SF ₆ gas only carried out separately, and cannot be recycled. In the process of extracting SF ₆ gas for processing , it will inevitably lead to the pressure drop of SF ₆ gas in the equipment, resulting in the reduction of insulation and arc extinguishing effect, which is not conducive to the long _- term operation of the equipment. When the micro water index reaches a certain level, it is not carried out in real time and has a hysteresis. There are inevitably traces of SO ₂ and H ₂ S in the equipment. If the circuit in the equipment is corroded, the loss will be huge.

SUMMARY OF THE INVENTION

In order to solve the above technical problems, the present invention provides a SF ₆ gas micro-water treatment device, which can realize the cyclic treatment of moisture and decomposition products in SF ₆ gas by setting up a series structure, which can not only ensure that the SF ₆ gas in the equipment is always in a stable state. It can better protect the circuits in the equipment, and it can also be connected with the equipment for a long time to realize real-time treatment, and the moisture and decomposition products can be treated at any time, avoiding the hidden risks caused by the lag of the existing technology.

The present invention is achieved through the following technical solutions:

An SF ₆ gas micro-water treatment device, comprising a first joint connected in series through a gas pipe, a first moisture measuring instrument, a first pressure gauge, a manual valve, a gas flow meter, a filtering mechanism, a drying mechanism, a gas compression unit and a second Joints, set up a double-joint series structure to realize the circulatory treatment of micro water and decomposed products in the equipment, adsorb the decomposed products generated by SF ₆ gas through the filtering mechanism, and filter the moisture by the drying mechanism, which can not only ensure that the SF ₆ gas in the equipment is always in a stable state It can better protect the circuits in the equipment, and it can also be connected with the equipment for a long time to realize real-time treatment, and the moisture and decomposition products can be treated at any time, avoiding the hidden risks caused by the lag of the existing technology.

The first joint and the second joint are respectively connected to the two ends of the power system equipment, so that the gas in the equipment forms a circulating flow, and the SF ₆ gas in the equipment can be fully treated, which further improves the SF ₆ gas micro-water treatment. Effect.

The filtering mechanism includes a first solenoid valve and a fixed bed adsorption reaction device. The gas flow meter, the first solenoid valve, the fixed bed adsorption reaction device and the drying mechanism are connected in series through a gas pipe. The fixed bed adsorption reaction device is provided with a device for neutralizing and drying. The alkali-modified activated carbon that adsorbs the decomposition products of SF ₆ gas can filter out the decomposition products such as SO ₂ and H ₂ S in the SF ₆ gas. The first solenoid valve is used to control the on-off of the gas circuit. When the gas circuit is cut off, it is easy to replace the activated carbon. .

The drying mechanism comprises a heat tracing adsorption regeneration unit, a gas storage unit and a gas circulation power unit which are connected end to end in sequence through a gas pipe, and the filter mechanism, the heat tracing adsorption regeneration unit, the gas storage unit and the gas compression unit are connected in series through the gas pipe in sequence, The heat tracing adsorption regeneration unit can absorb the moisture in the extracted SF ₆ gas, and then release the moisture into the external environment through heating, which can be used repeatedly _; If it does not meet the standard, it will be sent back to the heat tracing adsorption regeneration unit through the gas circulation power unit to be dried again until the water vapor content in the SF ₆ gas reaches the standard and then sent to the next link.

The gas storage unit comprises a cylinder, a second moisture measuring instrument and a second pressure gauge, the second moisture measuring instrument and the second pressure gauge are connected to the cylinder through a gas pipe, and the second moisture measuring instrument monitors the dried _SF gas, Ensure that the moisture content of the SF ₆ gas fed into the equipment after drying is up to standard, and the second pressure gauge ensures that the SF ₆ gas pressure pumped for drying treatment is equivalent to the SF ₆ gas pressure in the equipment, so as to avoid the SF ₆ gas pressure in the equipment caused by excessive extraction Lower, to better maintain the SF ₆ air pressure in the equipment is always in the optimal range.

The gas circulation power unit includes an air pump and a third solenoid valve and a fourth solenoid valve connected to both ends of the air pump. Usually, the third solenoid valve and the fourth solenoid valve are in a closed state. When the SF ₆ dried by the heat tracing adsorption regeneration unit When the moisture content in the gas does not meet the standard, the third solenoid valve and the fourth solenoid valve are opened, and the air pump sends the SF ₆ gas whose moisture content does not meet the standard to the heat tracing adsorption regeneration unit to be dried again.

The gas compression unit includes a gas driver and a fifth solenoid valve and a sixth solenoid valve connected at both ends of the gas driver. When the moisture content in the SF ₆ gas dried by the heat tracing adsorption regeneration unit reaches the standard, the fifth solenoid valve and the sixth solenoid valve reach the standard. The sixth solenoid valve opens, and the gas driver sends the dry and qualified SF ₆ gas back to the equipment.

Both the first connector and the second connector are quick-plug interfaces, which are convenient for connection operation.

Different from the above solution, the drying mechanism further includes a second solenoid valve, which is arranged between the filter mechanism and the heat tracing adsorption and regeneration unit, so as to control the on-off of the gas path when SF ₆ gas is supplemented.

A one-way input gas path is also connected between the second solenoid valve and the heat tracing adsorption regeneration unit through a three-way, and a first one-way valve is arranged on the one-way input gas path to realize one-way flow of the gas source to the processing device. Input gas, when the first pressure gauge detects that the air pressure of SF ₆ is low, close the second solenoid valve, and the SF ₆ gas source fills the drying mechanism with SF ₆ gas through the one-way input gas path. After drying up to the standard, it is added to the equipment , to further ensure that the SF ₆ air pressure in the equipment is always in the best range.

There is also a second one _- way valve between the gas compression unit and the second joint to prevent the SF gas in the equipment from flowing back to the micro-water treatment device through the second joint, so as to ensure that a one-way circulation is formed between the equipment and the micro-water treatment device. , thereby ensuring the effect of filtration and drying.

Different from the above scheme, another scheme also includes an overflow valve, which is connected between the filter mechanism and the second solenoid valve through a _{three -} way connection. When it is high, excess gas can be removed through the overflow valve to achieve dynamic balance of air pressure, which further ensures that the SF ₆ air pressure in the equipment is always in the best range, and the discharged SF ₆ gas is filtered to avoid environmental pollution. .

The beneficial effects of the present invention are:

Compared with the prior art, by setting up a double-joint series structure to realize the circulatory treatment of micro _- water and decomposed products in the equipment, the decomposed products generated by SF gas are adsorbed by the filtering mechanism, and the drying mechanism filters the moisture, which can not only ensure the SF in the equipment. _6. The gas is always in a stable range, which better protects the circuits in the equipment, and can also be connected to the equipment for a long time to realize real-time treatment, and the moisture and decomposition products can be treated at any time, avoiding the hidden risks caused by the lag of the existing technology. By setting the first pressure gauge and the second pressure gauge, the amount of SF ₆ gas extracted in each drying process can be ensured, and the SF ₆ gas pressure in the equipment can be better maintained within the optimal range. By setting a one-way input gas circuit in front of the drying mechanism, when the SF ₆ gas pressure in the equipment is low, the SF ₆ gas source fills the drying mechanism with SF ₆ gas through the one-way input gas path. Further ensure that the SF ₆ air pressure in the equipment is always in the optimal range. By arranging a one-way valve between the gas compression unit and the second joint, it is ensured that a one-way circulation is formed between the equipment and the micro-water treatment device, thereby ensuring the effect of filtration and drying. By setting an overflow valve between the filter mechanism and the second solenoid valve, the dynamic balance of air pressure is realized, which further ensures that the SF ₆ air pressure in the equipment is always in the best range, and the discharged SF ₆ gas is filtered, avoiding the need for air pressure. pollution of the environment.

Description of drawings

1 is a schematic structural diagram of Embodiment 1 of the present invention;

2 is a schematic structural diagram of Embodiment 2 of the present invention;

FIG. 3 is a schematic structural diagram of Embodiment 3 of the present invention.

In the figure: 1-first joint, 2-first moisture measuring instrument, 3-first pressure gauge, 4-manual valve, 5-gas flow meter, 6-first solenoid valve, 7-fixed bed adsorption reaction device, 8-Second solenoid valve, 9-Heat tracing adsorption regeneration unit, 10-Gas storage unit, 11-Gas circulation power unit, 12-Gas compression unit, 13-Cylinder, 14-Second moisture measuring instrument, 15-No. Two pressure gauges, 16-air pump, 17-third solenoid valve, 18-fourth solenoid valve, 19-gas driver, 20-fifth solenoid valve, 21-sixth solenoid valve, 22-second connector, 23-single To the input gas path, 24-the first one-way valve, 25-the third joint, 26-the second one-way valve, 27-relief valve.

Detailed ways

The technical solutions of the present invention are further described below, but the claimed scope is not limited to the description.

Example 1

As shown in Fig. 1, a SF ₆ gas micro-water treatment device includes a first joint 1, a first moisture measuring instrument 2, a first pressure gauge 3, a manual valve 4, a gas flow meter 5, a filter connected in series through a gas pipe in sequence Mechanism, drying mechanism, gas compression unit 12 and second joint 22, a double-joint series structure is set to realize the circulatory treatment of micro water and decomposed products in the equipment, the decomposed products generated by _SF gas are adsorbed by the filtering mechanism, and the drying mechanism filters the moisture , not only can ensure that the SF ₆ gas in the equipment is always in a stable range, better protect the circuit in the equipment, but also can be connected to the equipment for a long time to achieve real-time processing, moisture and decomposition products can be processed at any time, avoiding the existing technology. Risks caused by lag.

The first joint 1 and the second joint 22 are respectively connected to the two ends of the power system equipment, so that the gas in the equipment forms a circulating flow, and the SF ₆ gas everywhere in the equipment can be fully treated, which further improves the SF ₆ gas microscopicity. effect of water treatment.

The filtering mechanism includes a first solenoid valve 6 and a fixed bed adsorption reaction device 7, a gas flow meter 5, a first solenoid valve 6, a fixed bed adsorption reaction device 7 and a drying mechanism in series through a gas pipe in sequence, and the fixed bed adsorption reaction device 7 is connected in series. It is provided with alkali-modified activated carbon for neutralizing and adsorbing the decomposition products of SF ₆ gas, which can filter out the decomposition products such as SO ₂ and H ₂ S in the SF ₆ gas. When the gas circuit is used, it is easy to replace the activated carbon.

The drying mechanism includes a heat tracing adsorption and regeneration unit 9, a gas storage unit 10 and a gas circulation power unit 11, which are connected end to end through a gas pipe, and a filter mechanism, a heat tracing adsorption and regeneration unit 9, a gas storage unit 10, and a gas compression unit. 12 Through the gas pipes in series, the heat tracing adsorption regeneration unit 9 can absorb the moisture in the extracted SF ₆ gas, and then release the moisture into the external environment through heating, which can be used repeatedly; The water vapor content in the SF ₆ gas is monitored, and if it does not meet the standard, it is sent back to the heat tracing adsorption regeneration unit 9 through the gas circulation power unit 11 to be dried again until the water vapor content in the SF ₆ gas reaches the standard and then sent to the next link.

The gas storage unit 10 includes a cylinder 13, a second moisture measuring instrument 14 and a second pressure gauge 15. The second moisture measuring instrument 14 and the second pressure gauge 15 are connected to the cylinder through a trachea, and the second moisture measuring instrument 14 is used for drying. The SF ₆ gas is monitored to ensure that the moisture content of the SF ₆ gas fed into the equipment after drying is up to the standard, and the second pressure gauge 15 ensures that the SF ₆ gas pressure pumped into the drying treatment is equivalent to the SF ₆ gas pressure in the equipment to avoid extraction. Too much will cause the SF ₆ air pressure in the equipment to be low, and it is better to maintain the SF ₆ air pressure in the equipment in the optimal range.

The gas circulation power unit 11 includes an air pump 16 and a third solenoid valve 17 and a fourth solenoid valve 18 connected to both ends of the air pump 16. Usually, the third solenoid valve 17 and the fourth solenoid valve 18 are in a closed state. When the moisture content in the SF ₆ gas dried by the adsorption regeneration unit 9 is not up to the standard, the third solenoid valve 17 and the fourth solenoid valve 18 are opened, and the air pump 16 sends the SF ₆ gas whose moisture content does not meet the standard back to the heat tracing adsorption regeneration Unit 9 is dried again.

The gas compression unit 12 includes a gas driver 19 and a fifth solenoid valve 20 and a sixth solenoid valve 21 connected at both ends of the gas driver 19. When the moisture content in the SF ₆ gas dried by the heat tracing adsorption regeneration unit 9 reaches the standard , the fifth solenoid valve 20 and the sixth solenoid valve 21 are opened, and the gas driver 19 sends the dry and qualified SF ₆ gas back to the equipment.

The first connector 1 and the second connector 22 are both quick-plug interfaces, which are convenient for connection operation.

Embodiment 2

As shown in Figure 2, on the basis of the structure of the first embodiment, the following improvements are made:

The drying mechanism also includes a second solenoid valve 8, which is arranged between the filter mechanism and the heat tracing adsorption regeneration unit 9, so as to facilitate the control of the gas path on and off when SF ₆ gas is supplemented.

A one-way input gas path 23 is also connected between the second solenoid valve 8 and the heat tracing adsorption regeneration unit 9 through a three-way connection. One-way input gas in the processing device, the end of the one-way input gas path 23 is provided with a third joint 25, when the first pressure gauge 3 monitors that the SF ₆ gas pressure is low, the second solenoid valve 8 is closed, and the SF ₆ gas The source fills the drying mechanism with SF ₆ gas through the one-way input gas path 23. After drying to the standard, it is supplemented into the equipment to further ensure that the SF ₆ gas pressure in the equipment is always within the optimal range.

A second check valve 26 is also arranged between the gas compression unit ₁₂ and the second joint 22 to prevent the SF gas in the equipment from flowing back to the micro-water treatment device through the second joint 22, so as to ensure the gap between the equipment and the micro-water treatment device. One-way circulation is formed to ensure the effect of filtration and drying.

In the prior art, since the seal cannot be absolute, there will always be leakage. The power system equipment considers air pressure leakage and only has one interface to reduce the impact of leakage. The present invention realizes dynamic air pressure by monitoring and replenishing air in real time. Balance, the equipment does not need to consider the effect of adding an interface on leakage, the equipment can be easily modified to add an interface, and the micro water treatment device provided by the present invention can better protect the electrical circuit in the equipment.

Embodiment 3

As shown in Figure 3, on the basis of the structure of the second embodiment, the following improvements are made:

It also includes an overflow valve 27, which is connected between the filter mechanism and the second solenoid valve 8 through a three-way connection. When the SF ₆ gas source is filled with too much gas and the SF ₆ gas pressure in the device is too high, it can pass the overflow valve. The flow valve 27 removes excess gas, realizes the dynamic balance of air pressure, and further ensures that the SF ₆ air pressure in the equipment is always in the optimal range, and the discharged SF ₆ gas is filtered to avoid environmental pollution.

The invention provides a SF ₆ gas micro-water treatment device, which realizes the circulatory treatment of micro-water and decomposed products in the device by setting up a double-joint series structure, adsorbs the decomposed products generated by SF ₆ gas through a filtering mechanism, and filters the moisture through a drying mechanism. , not only can ensure that the SF ₆ gas in the equipment is always in a stable range, better protect the circuit in the equipment, but also can be connected to the equipment for a long time to achieve real-time processing, moisture and decomposition products can be processed at any time, avoiding the existing technology. Risks caused by lag. By setting the first pressure gauge and the second pressure gauge, the amount of SF ₆ gas extracted in each drying process can be ensured, and the SF ₆ gas pressure in the equipment can be better maintained within the optimal range. By setting a one-way input gas circuit in front of the drying mechanism, when the SF ₆ gas pressure in the equipment is low, the SF ₆ gas source fills the drying mechanism with SF ₆ gas through the one-way input gas path. Further ensure that the SF ₆ air pressure in the equipment is always in the optimal range. By arranging a one-way valve between the gas compression unit and the second joint, it is ensured that a one-way circulation is formed between the equipment and the micro-water treatment device, thereby ensuring the effect of filtration and drying. By setting an overflow valve between the filter mechanism and the second solenoid valve, the dynamic balance of air pressure is realized, which further ensures that the SF ₆ air pressure in the equipment is always in the best range, and the discharged SF ₆ gas is filtered, avoiding the need for air pressure. pollution of the environment.

Claims (10)

1. a SF ₆ gas micro-water treatment device, is characterized in that: comprise the first joint (1), the first moisture measuring instrument (2), the first pressure gauge (3), the manual valve (4) successively connected in series by the trachea ), a gas flow meter (5), a filtering mechanism, a drying mechanism, a gas compression unit (12) and a second joint (22). 2 . The SF ₆ gas micro-water treatment device according to claim 1 , wherein the first joint ( 1 ) and the second joint ( 22 ) are respectively connected to both ends of the power system equipment. 3 . 3. A SF ₆ gas micro-water treatment device as claimed in claim 1, characterized in that: the filtering mechanism comprises a first solenoid valve (6) and a fixed bed adsorption reaction device (7), a gas flow meter (5) ), the first solenoid valve (6), the fixed-bed adsorption reaction device (7) and the drying mechanism are connected in series through the gas pipe in sequence, and the fixed-bed adsorption reaction device (7) is provided with an alkali _modifier for neutralizing and adsorbing SF gas decomposition products. Activated carbon. 4. A SF ₆ gas micro-water treatment device according to claim 1, characterized in that: the drying mechanism comprises a heat tracing adsorption regeneration unit (9) and a gas storage unit (10) which are connected end-to-end through gas pipes in turn and the gas circulation power unit (11), and the filter mechanism, the heat tracing adsorption regeneration unit (9), the gas storage unit (10), and the gas compression unit (12) are connected in series through the gas pipe in sequence. 5. A SF ₆ gas micro-water treatment device according to claim 4, characterized in that: the gas storage unit (10) comprises a cylinder (13), a second moisture measuring instrument (14) and a second pressure gauge (15), the second moisture measuring instrument (14) and the second pressure gauge (15) are connected with the cylinder through the gas pipe; the gas circulation power unit (11) comprises an air pump (16) and a second air pump (16) connected at both ends Three solenoid valves (17) and a fourth solenoid valve (18). 6. A SF ₆ gas micro-water treatment device as claimed in claim 1, characterized in that: the gas compression unit (12) comprises a gas driver (19) and a fifth electromagnetic connected at both ends of the gas driver (19). valve (20) and sixth solenoid valve (21). 7. A SF ₆ gas micro-water treatment device according to claim 4, characterized in that: the drying mechanism further comprises a second solenoid valve (8), and the second solenoid valve (8) is arranged on the filter mechanism and the companion between thermal adsorption regeneration units (9). 8. The SF ₆ gas micro-water treatment device according to claim 7, characterized in that: the second solenoid valve (8) and the heat tracing adsorption regeneration unit (9) are also connected with a tee through a tee. A one-way input gas path (23), the one-way input gas path (23) is provided with a first one-way valve (24), so that the gas source can input gas into the processing device in one direction, and the one-way input gas path (23) ) end is provided with a third joint (25). 9. The SF ₆ gas micro-water treatment device according to claim 1, characterized in that: between the gas compression unit (12) and the second joint (22), a device is also provided to prevent the passage of SF ₆ gas in the equipment The second joint (22) returns to the second one-way valve (26) of the micro water treatment device. 10. A SF ₆ gas micro-water treatment device as claimed in claim 7, characterized in that it further comprises an overflow valve (27), and the overflow valve (27) is connected to the filter mechanism and the second solenoid valve through a three-way connection (8) between.

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