CN106402654A - Recycling device for tail gas of detector and sulfur hexafluoride gas detection device - Google Patents

Abstract

The invention relates to a detector tail gas recovery device and a sulfur hexafluoride gas detection device. The detector tail gas recovery device includes a buffer container, a compressor connected to the outlet of the buffer container, and a gas storage tank connected to the outlet of the compressor. , the buffer container is provided with a first pressure controller, the buffer container has a set pressure range, when the gas pressure in the buffer container is lower than the minimum value of the set pressure range, the first pressure controller controls the compressor to close, The compressor stops sending exhaust gas to the gas storage tank; when the gas pressure in the buffer container is higher than the maximum value of the set pressure range, the first pressure controller controls the compressor to turn on, and the compressor sends tail gas to the gas storage tank; use , the pressure difference between the gas pressure in the buffer container and the discharge pressure of the detector remains basically unchanged. Compared with the prior art, the tail gas recovery device of the detector of the present invention will not affect the accuracy of the detector.

Description

Detector tail gas recovery device and sulfur hexafluoride gas detection device

technical field

The invention relates to a detector tail gas recovery device and a sulfur hexafluoride gas detection device using the device.

Background technique

Sulfur hexafluoride gas has good electrical insulation performance and excellent arc extinguishing performance, and is widely used in electronic and electrical equipment, especially in high-voltage switchgear; although sulfur hexafluoride gas itself is non-toxic and harmless, it is used in Under the action of high-voltage arc, sulfur hexafluoride will also produce some toxic products; sulfur hexafluoride gas detectors are often installed to detect sulfur hexafluoride gas in the working environment; the current detectors will detect the exhaust gas Directly discharged into the air, it is easy to cause environmental pollution.

The Chinese utility model patent with the announcement number CN202693565U and the application date of 2012.07.10 discloses a device for recovering the tail gas of a sulfur hexafluoride gas detector, including an inlet pipe for communicating with the tail gas detector, from the inlet pipe to the Afterwards, the first solenoid valve, gas storage bag, first pressure sensor, compressor, second pressure sensor, gas storage tank, second solenoid valve, and exhaust pipe are provided in sequence; when in use, the sulfur hexafluoride gas detector discharges The exhaust gas enters the air storage bag through the intake pipe, and the air storage bag constitutes a buffer container; when the buffer container is full, the first pressure sensor starts the compressor, and the compressor compresses the gas in the buffer container into the air storage tank; when the gas storage When the tank reaches the maximum set pressure, the second pressure sensor cuts off the power supply of the compressor, so that the compressor stops working; the gas in the gas storage tank can be discharged from the exhaust pipe for recycling by the manufacturer.

When the above-mentioned existing tail gas recovery device works, the pressure in the buffer container gradually increases during the process of the exhaust gas in the buffer container from less to full, and the pressure difference between the detector and the buffer container gradually decreases. The continuous change of the difference is not conducive to the discharge of the exhaust gas of the detector, and affects the detection accuracy of the detector.

Contents of the invention

The purpose of the present invention is to provide a tail gas recovery device for a detector to solve the problem that the existing tail gas recovery device affects the detection accuracy of the detector because the pressure difference between the buffer container and the detector is constantly changing; The purpose is also to provide a sulfur hexafluoride gas detection device using the tail gas recovery device.

In order to achieve the above object, the technical scheme of the detector tail gas recovery device of the present invention is:

The exhaust gas recovery device of the detector includes a buffer container, a compressor connected to the outlet of the buffer container, and an air storage tank connected to the outlet of the compressor. The buffer container is provided with a first pressure controller, and the buffer container It has a set pressure range. When the gas pressure in the buffer container is lower than the minimum value of the set pressure range, the first pressure controller controls the compressor to shut down, and the compressor stops sending exhaust gas to the gas storage tank; when the gas pressure in the buffer container When the gas pressure is higher than the maximum value of the set pressure range, the first pressure controller controls the compressor to be turned on, and the compressor delivers tail gas to the gas storage tank.

The set pressure range of the buffer container is 0.09MPa to 0.11MPa.

A flow controller is also arranged between the buffer container and the compressor.

A second pressure controller is provided between the compressor and the gas storage tank, and the gas storage tank is set with a maximum pressure value. When the pressure of the gas storage tank is higher than the maximum pressure value, the second pressure controller controls the compressor to shut down.

The discharge port of the compressor is provided with a first safety valve, and the set pressure of the first safety valve is the maximum discharge pressure of the compressor.

The technical scheme of sulfur hexafluoride gas detection device of the present invention is:

The sulfur hexafluoride gas detection device includes a detector and a tail gas recovery device for recovering the tail gas of the detector. The tail gas recovery device includes a buffer container, a compressor connected to the exhaust port of the buffer container, and an exhaust gas from the compressor. The gas storage tank connected to the port, the buffer container is provided with a first pressure controller, the buffer container is set with a pressure range, when the pressure of the buffer container is lower than the minimum value of the set pressure range, the first pressure controller controls The compressor is turned off, and the compressor stops delivering exhaust gas to the gas storage tank; when the pressure of the buffer container is higher than the maximum value of the set pressure range, the first pressure controller turns on the compressor, and the compressor sends exhaust gas to the gas storage tank .

The set pressure range of the buffer container is 0.09MPa to 0.11MPa.

A flow controller is also arranged between the buffer container and the compressor.

A second pressure controller is provided between the compressor and the gas storage tank, and the gas storage tank is set with a maximum pressure value. When the pressure of the gas storage tank is higher than the maximum pressure value, the second pressure controller controls the compressor to shut down.

The discharge port of the compressor is provided with a first safety valve, and the set pressure of the first safety valve is the maximum discharge pressure of the compressor.

The beneficial effects of the present invention are: the first pressure controller controls the opening and closing of the compressor according to the set pressure range of the buffer container, so that the pressure difference between the gas pressure in the buffer container and the discharge pressure of the detector remains basically unchanged Compared with the constantly changing pressure difference between the detector and the buffer container in the exhaust gas recovery device in the prior art, the detector tail gas recovery device of the present invention will not affect the accuracy of the detector.

Further, since most of the existing detectors directly discharge the tail gas into the atmosphere, the pressure range of the buffer container is set to 0.09MPa to 0.11MPa, which is close to the standard atmospheric pressure.

Further, a flow controller is provided to prevent excessive flow when the compressor absorbs the tail gas, so that the inflow and outflow of the tail gas in the buffer container are approximately equal, and the pressure fluctuation of the buffer container is reduced.

Furthermore, a first safety valve is provided at the exhaust port of the compressor, and when the discharge pressure of the compressor is higher than the maximum pressure of the compressor, the first safety valve opens to protect the compressor.

Description of drawings

Fig. 1 is the structural representation of embodiment 1 of sulfur hexafluoride gas detection device of the present invention;

In the figure: 1-detector, 2-first valve, 3-first pressure gauge, 4-buffer container, 5-first pressure controller, 6-electronic flow controller, 7-compressor, 8-second Pressure controller, 9-first safety valve, 10-second valve, 11-second pressure gauge, 12-air storage tank, 13-second safety valve, 14-exhaust port, 15-exhaust gas recovery device.

detailed description

Embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

Embodiment 1 of the sulfur hexafluoride gas detection device of the present invention, as shown in Figure 1, comprises detector 1 and the tail gas recovery device 15 that links to each other with the exhaust port of detector 1, and detector 1 is prior art, not Repeat again; Exhaust gas recovery device 15 comprises buffer container 4, detector 1 and buffer container 4 are provided with first valve 2, buffer container 4 is provided with first pressure gauge 3 and first pressure controller 5, buffer container 4 The exhaust port is connected with a compressor 7; because most of the existing sulfur hexafluoride gas detectors directly discharge the tail gas into the air, the set pressure range of the buffer container 4 is 0.09MPa to 0.09MPa in the present embodiment. 0.11MPa, the pressure range is close to the standard atmospheric pressure; the first pressure gauge 3 displays the pressure value of the buffer container 4 in real time, and once the pressure of the buffer container 4 is abnormal, it can be found in time.

The setting value of the first pressure controller 5 is 0.09MPa and 0.11MPa, the first pressure controller is connected with the compressor control, when the pressure of the buffer container 4 is less than 0.09MPa, the first pressure controller 5 closes the compressor 7 , the pressure of the buffer container 4 is increased; when the pressure of the buffer container 4 was higher than 0.11MPa, the first pressure controller 5 opened the compressor 7 to reduce the pressure of the buffer container 4; the pressure of the buffer container remained at 0.09MPa Between 0.11MPa and 0.11MPa, the pressure difference between detector 1 and buffer container 4 remains basically unchanged, and the exhaust gas discharge of detector 1 is relatively stable, which will not affect the detection accuracy of detector 1.

It should be noted that there is a reaction time from the pressure in the buffer container 4 reaching 0.11MPa to the start of the compressor 7. When the compressor 7 is turned on, the pressure in the buffer container 4 may be slightly higher than 0.11MPa. Similarly, The pressure of the buffer container 4 may also be slightly lower than 0.09MPa, so the maximum and minimum values of the set pressure range of the buffer container 4 are not a completely definite value, but a value that fluctuates within a certain range.

An electronic flow controller 6 is arranged between the buffer container 4 and the compressor 7, and the setting value of the electronic flow controller 6 is consistent with the discharge flow rate of the exhaust gas of the detector 1, so as to prevent the excessive flow rate when the compressor 6 absorbs the exhaust gas. The pressure of the buffer container 4 is more stable.

The exhaust port of the compressor 7 is connected with an air storage tank 12, and the compressor 7 compresses the tail gas absorbed from the buffer container 4 and stores it in the air storage tank 12, and a second The pressure controller 8, the second valve 10 and the first safety valve 9, the set value of the second pressure controller 8 is lower than the maximum discharge pressure of the compressor 7, the air storage tank 12 is provided with an exhaust port 14, when the storage When the pressure of the gas tank 12 reaches its set maximum pressure, the second pressure controller 8 closes the compressor 7, at this time, the second valve 10 is closed, and the exhaust gas in the gas storage tank 12 can be transferred from the exhaust port 14 into other containers or directly purify and recover; when the gas recovery in the gas storage tank 12 is completed, the exhaust port 4 is closed, and the second valve 10 is opened; when the pressure in the buffer container 4 is higher than 0.11MPa, the first The pressure controller 5 turns on the compressor 7, and the compressor 7 starts charging the gas storage tank 12 again.

The set value of the first safety valve 9 is the highest discharge pressure of the compressor 7, when the discharge pressure of the compressor is higher than the maximum pressure of the compressor, the first safety valve is opened to protect the compressor; the gas storage tank 12 The second pressure gauge 11 and the second safety valve 13 are arranged on the top, and the second pressure gauge 11 displays the pressure value of the gas storage tank 12 in real time. Once the pressure of the gas storage tank 12 is abnormal, it can be found in time; When the pressure exceeds its maximum pressure, the second safety valve 13 is opened to prevent the pressure of the gas storage tank 12 from being too high.

Of course, in other embodiments of the first embodiment of the sulfur hexafluoride gas detection device of the present invention, the set pressure range of the buffer container can be adjusted according to the actual situation.

The specific embodiment of the detector tail gas recovery device of the present invention, the structure of the specific embodiment of the detector tail gas recovery device is the same as the structure of the tail gas recovery device in any embodiment of the above-mentioned sulfur hexafluoride gas detection device of the present invention, The description will not be repeated.

Claims (10)

1. detector device for recovering tail gas, the compressor including buffer container, being connected with the exhaust outlet of buffer container and with compression Air accumulator that the exhaust outlet of machine is connected it is characterised in that：Described buffer container is provided with first pressure controller, and buffer container has There is setting pressure limit, when the gas pressure in buffer container is less than the minimum of a value setting pressure limit, first pressure controls Device controls compressor to cut out, and compressor stops conveying tail gas into air accumulator；When the gas pressure in buffer container is higher than to set During the maximum of pressure limit, first pressure controller controls compressor to open, and compressor conveys tail gas in air accumulator.

2. detector device for recovering tail gas according to claim 1 it is characterised in that：The setting pressure limit of buffer container For 0.09MPa to 0.11MPa.

3. detector device for recovering tail gas according to claim 1 and 2 it is characterised in that：Buffer container and compressor it Between be additionally provided with flow controller.

4. detector device for recovering tail gas according to claim 1 and 2 it is characterised in that：Between compressor and air accumulator It is provided with second pressure controller, air accumulator is set with maximal pressure force value, when the pressure of air accumulator is higher than maximal pressure force value, second Pressure controller controls compressor to cut out.

5. detector device for recovering tail gas according to claim 1 and 2 it is characterised in that：The exhaust ports of compressor set Have the first safety valve, the first safety valve set pressure as the MDP of compressor.

6. sulfur hexafluoride gas detection means, the device for recovering tail gas including detector with for reclaiming detector tail gas, described Device for recovering tail gas is included buffer container, the compressor being connected with the exhaust outlet of buffer container and is connected with the exhaust outlet of compressor Air accumulator it is characterised in that：Described buffer container is provided with first pressure controller, and buffer container is set with pressure limit, When the pressure of buffer container is less than the minimum of a value setting pressure limit, first pressure controller controls compressor to cut out, compression Machine stops conveying tail gas into air accumulator；When the pressure of buffer container is higher than the maximum setting pressure limit, first pressure Controller controls compressor to open, and compressor conveys tail gas in air accumulator.

7. sulfur hexafluoride gas detection means according to claim 6 it is characterised in that：The setting pressure model of buffer container Enclose for 0.09MPa to 0.11MPa.

8. the sulfur hexafluoride gas detection means according to claim 6 or 7 it is characterised in that：Buffer container and compressor Between be additionally provided with flow controller.

9. the sulfur hexafluoride gas detection means according to claim 6 or 7 it is characterised in that：Compressor and air accumulator it Between be provided with second pressure controller, air accumulator is set with maximal pressure force value, when the pressure of air accumulator is higher than maximal pressure force value, the Two pressure controllers control compressor to cut out.

10. the sulfur hexafluoride gas detection means according to claim 6 or 7 it is characterised in that：The exhaust ports of compressor Be provided with the first safety valve, the first safety valve set pressure as the MDP of compressor.