CN211122714U - Quick detection device of SF6 decomposition product SOF2 - Google Patents
Quick detection device of SF6 decomposition product SOF2 Download PDFInfo
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- CN211122714U CN211122714U CN201922218506.0U CN201922218506U CN211122714U CN 211122714 U CN211122714 U CN 211122714U CN 201922218506 U CN201922218506 U CN 201922218506U CN 211122714 U CN211122714 U CN 211122714U
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- 238000001514 detection method Methods 0.000 title claims abstract description 63
- 238000000354 decomposition reaction Methods 0.000 title claims abstract description 18
- LSJNBGSOIVSBBR-UHFFFAOYSA-N thionyl fluoride Chemical compound FS(F)=O LSJNBGSOIVSBBR-UHFFFAOYSA-N 0.000 title description 4
- 101000856246 Arabidopsis thaliana Cleavage stimulation factor subunit 77 Proteins 0.000 title 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical class O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 29
- 239000000523 sample Substances 0.000 claims description 17
- 239000003054 catalyst Substances 0.000 claims description 13
- 229910018503 SF6 Inorganic materials 0.000 claims description 11
- 229920006395 saturated elastomer Polymers 0.000 claims description 6
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims description 4
- GNTDGMZSJNCJKK-UHFFFAOYSA-N divanadium pentaoxide Chemical compound O=[V](=O)O[V](=O)=O GNTDGMZSJNCJKK-UHFFFAOYSA-N 0.000 claims description 4
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 4
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 claims description 3
- 229960000909 sulfur hexafluoride Drugs 0.000 claims description 3
- 229910003446 platinum oxide Inorganic materials 0.000 claims description 2
- 210000003437 trachea Anatomy 0.000 claims 3
- 239000007788 liquid Substances 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 description 14
- 238000006460 hydrolysis reaction Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 6
- 238000004140 cleaning Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 238000004566 IR spectroscopy Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004817 gas chromatography Methods 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000001727 in vivo Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000003550 marker Substances 0.000 description 1
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Abstract
The utility model relates to a SF6Decomposition product SOF2The rapid detection device comprises a control circuit and a detection circuit, wherein an air inlet and a gas inlet of gas to be detected are arranged on the detection circuit, a thermostat and a reactor are arranged in the middle of the detection device, a condenser is arranged on the right side of the detection device, the flow of the gas passing through the detection device is calculated through an arranged digital flowmeter, the control circuit realizes the control of the flow and the temperature of the gas passing through the detection device, and the flow passing through the digital flowmeter is recorded in real time; from the above-mentioned numerical values, SOF was obtained by calculation2The concentration of (c); the utility model is provided withThe detection is convenient, simple and easy, and the detection precision is high.
Description
Technical Field
The utility model relates to a gaseous detection technology field, concretely relates to SF6Decomposition product SOF2The rapid detection device of (1).
Background
SF6Decomposition occurs under overheat or discharge conditions and can be detected by detecting SF6Decomposition products to SF6And (5) early fault diagnosis of the electric appliance. SF6SOF in decomposition products2(thionyl fluoride) appears in various failures and is present in higher concentrations and is considered to be a more effective marker. SOF2The detection of (2) mostly adopts a gas chromatography or gas chromatography-mass spectrometer instrument or Fourier infrared spectroscopy, and the technologies need expensive instruments and cannot realize on-site rapid detection; some portable instruments can only detect SOF2+SO2Total concentration of (2), no sole recognition of SOF2。SO2Is a SOF2Products after further hydrolysis, with SF6The electrical appliance manufacturing level is greatly improved, and the water content can be controlled to be very low even in the SOF2Already at very high concentrations, SOF was detected2+SO2The total concentration of (c) is still low; therefore, the SF with convenient detection, simple and easy operation and high detection precision is provided6Decomposition product SOF2A rapid detection device of (2) is very necessary.
Disclosure of Invention
The purpose of the utility model is to overcome the defects of the prior art and provide an SF with convenient detection, simple and easy operation and high detection precision6Decomposition product SOF2The rapid detection device of (1).
The purpose of the utility model is realized like this: SF (sulfur hexafluoride)6Decomposition product SOF2The rapid detection device comprises a control circuit and a detection circuit, wherein the detection circuit is provided with an air inlet and a gas inlet to be detected, the air inlet is connected with an air pump A, the other end of the air pump A is connected with a solenoid valve A through an air pipe, the gas inlet to be detected is connected with an air pump B, the other end of the air pump B is connected with a solenoid valve B through an air pipe, the other end of the solenoid valve B is connected with a mass flow meter B, the other end of the solenoid valve A and the other end of the mass flow meter B are respectively connected with a three-way valve A through an air pipe, the last end of the three-way valve A is connected with one end of the three-way valve B, the other end of the three-way valve B is connected with a mass flow meter C, the last end of the three-way valve B is connected with a reactor in a thermostat, a heater is arranged at the bottom of the thermostat, a temperature detection probe is arranged on the right side of the heater, the other side of the reactor is connected with a condenser through an air pipe, an outlet of the condenser is connected with a digital flowmeter through an air pipe, the other end of the digital flowmeter is connected with a buffer container, a concentration detection probe is arranged in the buffer container, and an exhaust port is also arranged on the buffer container;
the control circuit comprises a central control unit which is electrically connected with the air pump A, the air pump B, the electromagnetic valve A, the electromagnetic valve B, the mass flow meter C, the electromagnetic valve C, the air pump C, the saturated water vapor generating device, the heater, the temperature detection probe, the digital flow meter and the concentration detection probe respectively.
The air inlet is filled with air for cleaning the pipeline and the reactor.
The reactor is internally provided with a catalyst, and the catalyst adopts barium sulfate with platinum or vanadium pentoxide loaded on the surface.
The condenser is a water-cooled condenser, which not only has the effect of cooling, but also can absorb HF generated by the reaction.
The condenser comprises a condensed water tank, a condensed water pump and a condensing radiator, and the condensed water pump is electrically connected with the central control unit.
The saturated water vapor generation device can generate saturated water vapor at the temperature of 100-200 ℃.
The temperature control range of the constant temperature box is 100-.
SF6Decomposition product SOF2The detection method of the rapid detection device comprises the following steps:
step 1), electrifying the detection device, and setting the temperature T of the saturated steam generation device1And the temperature T of the incubator2，T1And T2Satisfies the following conditions: t is not less than 100 DEG C1≤200℃，100℃≤T2At most 200 ℃ and T1≤T2；
Step 2), starting a condensate pump;
step 3), setting a mass flow meter B of the gas to be measured, wherein the flow rate is set to L1A mass flow meter C for saturated water vapor with a flow rate of L2；
Step 4), operating the detection device, and continuously stabilizing for 10 minutes after the constant temperature box and the saturated water vapor generation device reach the set temperature; opening an electromagnetic valve A of an air inlet, simultaneously starting an air pump A, cleaning the whole pipeline for 2 minutes, and then closing the electromagnetic valve A and the air pump A;
step 5), opening the electromagnetic valve B, starting the air pump B, and setting the flow L according to the mass flow meter B1Extracting gas to be detected; the central control unit measures SO through the concentration detection probe2Concentration, recording the concentration value after the value is stable, and setting the concentration value as Cso2The central control unit records the flow rate of the exhaust gas through a digital flowmeter and sets the flow rate as L3；
Step 6), opening the electromagnetic valve C, starting the air pump C, and setting the flow L according to the mass flow meter C2Pumping saturated water vapor, mixing the saturated water vapor with the gas to be detected, and then entering a reactor;
step 7), mixing the gas to be detected with saturated water vapor, entering a reactor, and obtaining the SOF in the gas to be detected2At a reasonable temperature T with water vapour2Reacting with catalyst to generate SO2And HF; after the reaction, the gas passes through a condenser, the temperature of the gas is reduced, and simultaneously the moisture in the gas and the generated HF are removed;
step 8), after the gas enters the buffer container after reaction, the central control unit measures SO through the concentration detection probe2Concentration, recording the concentration value after the value is stable, and setting the concentration value as Csof2+so2The central control unit records the flow rate of the exhaust gas through a digital flowmeter and sets the flow rate as L4；
Step 9), the central control unit calculates the SOF in the gas to be measured according to the following formula2The concentration of (a):
①、SOF2SO formed by hydrolysis2Concentration Csof2→SO2In the unit of mg.m-3：
② conversion of SOF from the reaction equation2Concentration C ofsof2In the unit of mg.m-3：
step 10), the central control unit outputs and displays the final SOF2In mg.m units-3。
The flow rate L of the gas to be measured in the step 3)1Saturated steam flow L2The selection of (A) should meet the following conditions:
the total volume of the reactor is V, and the bulk density of the prepared catalyst is rhoBTrue density of the prepared catalyst rhoPAnd then: porosity of the reactor is：
①, gas flow L to be measured1With saturated steam flow L2The relationship of (1) is:
；
②, the retention time of the gas to be detected in the reactor is more than or equal to 1min and less than or equal to t and less than or equal to 10 min;
③, gas flow L to be measured1Selected according to the following formula:
the utility model has the advantages that: the present technique utilizes SOF2Under the action of reasonable catalyst and temp., the SOF is hydrolyzed2Conversion to SO2By detecting SO after hydrolysis2Total concentration, and subtracting SO before hydrolysis2Concentration, using a stoichiometric relationship to obtain SOF2The actual concentration of (c). The method has higher SOF2The recognition degree is simple and easy to implement; the utility model has the advantages of a detect convenience, simple accurate, that the detection precision is high.
Drawings
FIG. 1 shows the SF of the present invention6Decomposition product SOF2The structure of the rapid detection device is shown schematically.
In the figure 1, an air inlet 2, a gas inlet 3 to be detected, an air pump A4, an air pump B5, an electromagnetic valve A6, an electromagnetic valve B7, a mass flow meter B8, a saturated water vapor generating device 9, an air pump C10, an electromagnetic valve C11, a mass flow meter C12, a constant temperature box 13, a reactor 14, a temperature detection probe 15, a heater 16, a condenser 17, a buffer container 18, a concentration detection probe 19, an exhaust port 20, a central control unit 21, a condensed water tank 22, a condensed water pump 23, a condensed radiator 24, a digital flow meter 25, cold water 26, an air pipe 27, a three-way valve A28 and a three-way valve B.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
Example 1
As shown in FIG. 1, a SF6Decomposition product SOF2The rapid detection device comprises a control circuit and a detection circuit, wherein an air inlet 1 and an air inlet 2 to be detected are arranged on the detection circuit, the air inlet 1 is connected with an air pump A3, the other end of the air pump A3 is connected with a solenoid valve A5 through an air pipe 26, the air inlet 2 to be detected is connected with an air pump B4, the other end of the air pump B4 is connected with a solenoid valve B6 through the air pipe 26, the other end of the solenoid valve B6 is connected with a mass flow meter B7, the other end of the solenoid valve A5 and the other end of the mass flow meter B7 are respectively connected through the air pipe 26 and a three-way valve A27, the last end of the three-way valve A27 is connected with one end of a three-way valve B28, the other end of the three-way valve B28 is connected with a mass flow meter C11 through the air pipe 26, the other end of the, the last end of the three-way valve B28 is connected with a reactor 13 in a thermostat 12, the bottom of the thermostat 12 is provided with a heater 15, the right side of the heater 15 is provided with a temperature detection probe 14, the other side of the reactor 13 is connected with a condenser 16 through an air pipe 26, the outlet of the condenser 16 is connected with a digital flowmeter 24 through an air pipe 26, the other end of the digital flowmeter 24 is connected with a buffer container 17, the buffer container 17 is internally provided with a concentration detection probe 18, and the buffer container 17 is also provided with an exhaust port 19;
the control circuit comprises a central control unit 20, and the central control unit 20 is electrically connected with an air pump A3, an air pump B4, an electromagnetic valve A5, an electromagnetic valve B6, a mass flow meter B7, a mass flow meter C11, an electromagnetic valve C10, an air pump C9, a saturated water vapor generation device 8, a heater 15, a temperature detection probe 14, a digital flow meter 24 and a concentration detection probe 18 respectively.
The present technique utilizes SOF2Under the action of reasonable catalyst and temp., the SOF is hydrolyzed2Is converted intoSO2By detecting SO after hydrolysis2Total concentration, and subtracting SO before hydrolysis2Concentration, using a stoichiometric relationship to obtain SOF2The actual concentration of (c). The method has higher SOF2The recognition degree is simple and easy to implement; the utility model has the advantages of a detect convenience, simple accurate, that the detection precision is high.
Example 2
The detection device is operated according to the following steps when in use:
step 1), electrifying the detection device, and setting the temperature T of the saturated steam generation device 81And temperature T of oven 122，T1And T2Satisfies the following conditions: t is not less than 100 DEG C1≤200℃，100℃≤T2At most 200 ℃ and T1≤T2；
Step 2), starting a condensate pump 22;
step 3), setting a mass flow meter B7 of the gas to be measured, wherein the flow rate is set to be L1A mass flow meter C11 for saturated steam with a flow rate of L2；
Step 4), operating the detection device, and continuously stabilizing for 10 minutes after the constant temperature box 12 and the saturated water vapor generation device 8 reach the set temperature; opening the electromagnetic valve A5 of the air inlet 1, simultaneously starting the air pump A3, cleaning the whole pipeline for 2 minutes, and then closing the electromagnetic valve A5 and the air pump A3;
step 5), opening the electromagnetic valve B6, starting the air pump B4, and setting the flow rate L according to the mass flow meter B71Extracting gas to be detected; the central control unit 20 measures SO through the concentration detection probe 182Concentration, recording the concentration value after the value is stable, and setting the concentration value as Cso2The central control unit 20 records the flow of the exhaust gas as L through the digital flow meter 243；
Step 6), opening the electromagnetic valve C10, starting the air pump C9, and setting the flow rate L according to the mass flow meter C112Pumping saturated water vapor, mixing the saturated water vapor with the gas to be detected, and then feeding the mixture into the reactor 13;
step 7), mixing the gas to be detected with saturated water vapor and feeding the mixture into a reactor 13, wherein the gas to be detectedSOF in vivo2At a reasonable temperature T with water vapour2Reacting with catalyst to generate SO2And HF; the reacted gas passes through a condenser 16, the temperature of the gas is reduced, and simultaneously the moisture in the gas and the generated HF are removed;
step 8), after the gas enters the buffer container after reaction, the central control unit 20 measures SO through the concentration detection probe 182Concentration, recording the concentration value after the value is stable, and setting the concentration value as Csof2+so2The central control unit 20 records the flow of the exhaust gas as L through the digital flow meter 244；
Step 9), the central control unit 20 calculates the SOF in the gas to be measured according to the following formula2The concentration of (a):
①、SOF2SO formed by hydrolysis2Concentration Csof2→SO2In the unit of mg.m-3：
② conversion of SOF from the reaction equation2Concentration C ofsof2In the unit of mg.m-3：
step 10), the central control unit 20 outputs and displays the final SOF2In mg.m units-3。
The flow rate L of the gas to be measured in the step 3)1Saturated steam flow L2The selection of (A) should meet the following conditions:
the total volume of the reactor 13 is V and the bulk density of the prepared catalyst is rhoBThe prepared catalyst is denseDegree rhoPAnd then: the porosity of the reactor was:
①, gas flow L to be measured1With saturated steam flow L2The relationship of (1) is:
；
②, the retention time of the gas to be detected in the reactor is more than or equal to 1min and less than or equal to t and less than or equal to 10 min;
③, gas flow L to be measured1Selected according to the following formula:
the present technique utilizes SOF2Under the action of reasonable catalyst and temp., the SOF is hydrolyzed2Conversion to SO2By detecting SO after hydrolysis2Total concentration, and subtracting SO before hydrolysis2Concentration, using a stoichiometric relationship to obtain SOF2The actual concentration of (c). The method has higher SOF2The recognition degree is simple and easy to implement; the utility model has the advantages of a detect convenience, simple accurate, that the detection precision is high.
Claims (6)
1. SF (sulfur hexafluoride)6Decomposition product SOF2The rapid detection device comprises a control circuit and a detection circuit, and is characterized in that: be provided with air inlet on the detection line and wait to examine gas inlet, air inlet is connected with air pump A, the air pump A other end is connected with solenoid valve A through the trachea, it is connected with air pump B to wait to examine gas inlet, the air pump B other end is connected with solenoid valve B through the trachea, the solenoid valve B other end is connected with mass flow meter B, the solenoid valve A other end and the mass flow meter B other end are connected through trachea and three-way valve A respectively, three-way valve A one end is connected with three-way valve B one end at last, the three-way valve B other end isThe device comprises a gas pipe, a mass flow meter C, a solenoid valve C, an air pump C, a saturated steam generator, a three-way valve B, a heater, a temperature detection probe, a condenser, a buffer container, a gas outlet, a gas pipe, a three-way valve B, a reactor, a digital flow meter, a gas-liquid separator and;
the control circuit comprises a central control unit which is electrically connected with the air pump A, the air pump B, the electromagnetic valve A, the electromagnetic valve B, the mass flow meter C, the electromagnetic valve C, the air pump C, the saturated water vapor generating device, the heater, the temperature detection probe, the digital flow meter and the concentration detection probe respectively.
2. SF according to claim 16Decomposition product SOF2The rapid detection device is characterized in that: a catalyst is arranged in the reactor, and the catalyst adopts barium sulfate with platinum or vanadium pentoxide loaded on the surface.
3. SF according to claim 16Decomposition product SOF2The rapid detection device is characterized in that: the condenser is a water-cooled condenser.
4. SF according to claim 16Decomposition product SOF2The rapid detection device is characterized in that: the condenser comprises a condensed water tank, a condensed water pump and a condensing radiator, and the condensed water pump is electrically connected with the central control unit.
5. SF according to claim 16Decomposition product SOF2The rapid detection device is characterized in that: the saturated water vapor generation device canGenerating saturated water vapor at 100-.
6. SF according to claim 16Decomposition product SOF2The rapid detection device is characterized in that: the temperature control range of the constant temperature box is 100-200 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922218506.0U CN211122714U (en) | 2019-12-12 | 2019-12-12 | Quick detection device of SF6 decomposition product SOF2 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922218506.0U CN211122714U (en) | 2019-12-12 | 2019-12-12 | Quick detection device of SF6 decomposition product SOF2 |
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| Publication Number | Publication Date |
|---|---|
| CN211122714U true CN211122714U (en) | 2020-07-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922218506.0U Expired - Fee Related CN211122714U (en) | 2019-12-12 | 2019-12-12 | Quick detection device of SF6 decomposition product SOF2 |
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| Country | Link |
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| CN (1) | CN211122714U (en) |
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- 2019-12-12 CN CN201922218506.0U patent/CN211122714U/en not_active Expired - Fee Related
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Granted publication date: 20200728 |