CN108101006A - A kind of SF6And N2The quick recycling and processing device of mixed gas and method - Google Patents
A kind of SF6And N2The quick recycling and processing device of mixed gas and method Download PDFInfo
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- CN108101006A CN108101006A CN201711381517.XA CN201711381517A CN108101006A CN 108101006 A CN108101006 A CN 108101006A CN 201711381517 A CN201711381517 A CN 201711381517A CN 108101006 A CN108101006 A CN 108101006A
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B17/00—Sulfur; Compounds thereof
- C01B17/45—Compounds containing sulfur and halogen, with or without oxygen
- C01B17/4507—Compounds containing sulfur and halogen, with or without oxygen containing sulfur and halogen only
- C01B17/4515—Compounds containing sulfur and halogen, with or without oxygen containing sulfur and halogen only containing sulfur and fluorine only
- C01B17/453—Sulfur hexafluoride
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B21/00—Nitrogen; Compounds thereof
- C01B21/04—Purification or separation of nitrogen
- C01B21/0405—Purification or separation processes
- C01B21/0433—Physical processing only
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B21/00—Nitrogen; Compounds thereof
- C01B21/04—Purification or separation of nitrogen
- C01B21/0405—Purification or separation processes
- C01B21/0433—Physical processing only
- C01B21/0438—Physical processing only by making use of membranes
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- Inorganic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
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Abstract
The present invention relates to a kind of SF6And N2The quick recycling and processing device of mixed gas and method, apparatus of the present invention are included through the sequentially connected non-return valve of pipeline, dry filtrating equipment, SF6Retracting device, gas fractionation unit and nitrogen gas recovering apparatus；SF is installed by pipeline on dry filtrating equipment and gas fractionation unit6Gas analyzer installs SF on nitrogen gas recovering apparatus by pipeline6Gas detecting instrument, the method for the present invention use：By SF6And N2The step of mixed gas reclaiming clean, SF6The step of gas condensation purification, SF6And N2The step of mixed gas separates, N2Gas purification and canned step；Compression condensation separation and polymeric membrane isolation technics are taken, recovery processing speed is improved, realizes SF6And N2Mixed gas is quickly recycled.
Description
Technical field
The present invention relates to a kind of SF6And N2It is exhausted to belong to power industry mixing for the quick recycling and processing device of mixed gas and method
Edge gas purification processing technology field.
Background technology
Pure SF6(sulfur hexafluoride) gas is at normal temperatures and pressures colourless, odorless, nontoxic, incombustible gas, tool
There are excellent insulation characterisitic and arc extinguishing ability, be a kind of preferable dielectric.Rapid development and technology with power industry
The raising of equipment, substantial amounts of sulfur hexafluoride breaker and fully closed combined electric unit constantly put into construction and operation, hexafluoro
It is increasing to change sulphur dosage.
But SF6Gas also has its shortcoming in the application：(1) it is more sensitive to electric fields uniform degree, only equal
Its advantage can be just shown in even or slightly uneven electric field；(2) SF of discharge in an atmosphere6Gas is difficult to degrade, in the presence of
Between it is long, to global warming have cumulative effect；(3)SF6The price of gas is higher, improves cost.
In recent years, reduction greenhouse gas emission, environmental protection work are increasingly paid attention to both at home and abroad, it will for response environmental protection
It asks, major relevant industries are reducing the discharge of sulfur hexafluoride greenhouse gases；Also six are being reduced in high-voltage switch gear electrical equipment
Sulfur fluoride gas usage promotes mix insulation gas especially to promote SF in the application of electrical equipment6And N2Mix insulation gas
Use, in use, need to be to SF6And N2Mix insulation gas carries out purity detecting.
In the commonly used SF in the high and cold low temp area in China6And N2The high-tension switch gear of mixed gas, internal gas
Body is also required to reclaiming clean in the case where not meeting running sulfur hexafluoride gas and using standard.It is but same on current market
The equipment of class is mostly in terms of the purification and purification of sulfur hexafluoride gas, is related to N2Separating-purifying relevant device not into
It is ripe.
Chinese patent " a kind of sulfur hexafluoride and nitrogen mixed gas isolation of purified processing unit and purified treatment mixed gas
Method " (104174249 B of patent No. CN) provide a kind of purified treatment SF6And N2The method of mixed gas, but the party
There are its own shortcomings for method：- cure-the strategy purification SF dissolved first, using liquefaction6Gas fails to make full use of SF6Gas is easy
It compresses and liquefies and N2The characteristics of being difficult to liquefy wastes substantial amounts of energy after deep cooling cooling and in heating process；Second is that SF6With
N2Mix insulation gas is difficult to thoroughly recycle SF only with compression subzero treatment6Gas, the SF not being recovered6Gas is with N2Together
It is discharged into air, environment can be damaged.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of easy to operate, high treating effect, energy-saving and environment-friendly electrical
SF in equipment6And N2The quick recovery and treatment method of mix insulation gas.
The present invention adopts the following technical scheme that：
Apparatus of the present invention are included through the sequentially connected non-return valve of pipeline, dry filtrating equipment, SF6Retracting device, gas
Separator and nitrogen gas recovering apparatus；SF is installed by pipeline on dry filtrating equipment and gas fractionation unit6Gas analysis
Instrument installs SF on nitrogen gas recovering apparatus by pipeline6Gas detecting instrument.
Dry filtrating equipment described in apparatus of the present invention is included through sequentially connected first self-sealing joint of pipeline, the first ball
Valve, drying chamber, filtering tank and the first surge tank；5th pressure gauge is installed, described between the first self-sealing joint and the first ball valve
First surge tank side sets the second self-sealing joint and the 3rd self-sealing joint by pipeline respectively, in the first surge tank and second certainly
First solenoid valve between sealing joint is installed, the second ball valve is installed between the first surge tank and the 3rd self-sealing joint, second is self-styled
Connector and SF6Retracting device connects, the 3rd self-sealing joint and SF6One side interface of gas analyzer connects；In first surge tank
Top sets first pressure sensor and first pressure gauge by pipeline respectively；It is set between the first surge tank and first pressure gauge
It puts first and screws valve and the first safety valve；The molecular sieve of model 5A is loaded in the drying chamber；It is filled out in the filtering tank
HEPA filtering steel wire racks are filled, filtering accuracy is less than 0.5 μm.
SF described in apparatus of the present invention6Retracting device is included through sequentially connected first compressor of pipeline, drainer, purification
Tank and SF6Gas bomb；The drainer is arranged on above purification tank, and the bottom of drainer is connected with purification tank top, is condensing
Refrigeration machine is installed between tank and purification tank；The first thermal heat exchanger being connected with refrigeration machine is set in the drainer side,
Purification sets the second thermal heat exchanger being connected with refrigeration machine in tank top；The first compressor one side sets the by pipeline
Four self-sealing joints, the 4th self-sealing joint are connected with the second self-sealing joint；It is set between the first compressor opposite side and drainer
Put the first check valve；The 5th pressure sensor and the first temperature sensor are set on purification tank；Is set at the top of drainer
Two pressure sensors and second pressure gauge set second to screw valve and the second safety valve between drainer and second pressure gauge；
The 5th self-sealing joint, the 6th self-sealing joint and second temperature sensor are set by pipeline respectively in the drainer opposite side,
5th self-sealing joint and the 6th self-sealing joint are connected respectively with gas fractionation unit, are pacified between drainer and the 5th self-sealing joint
The 4th solenoid valve is filled, the 3rd check valve is installed between drainer and the 6th self-sealing joint；In SF6Between gas bomb and purification tank
3rd ball valve is installed；In purification pot bottom, weighing apparatus are set；The model CWZ-75 of refrigeration machine, refrigeration depth are -40 DEG C；It is described
First compressor is oilless (oil free) compressor.
Gas fractionation unit described in apparatus of the present invention includes the second surge tank, the second surge tank one side is arranged on by pipeline
Second compressor of lower part and the submerged membrane separation tank that another upper lateral part of the second surge tank is arranged on by pipeline；In the second compressor and
4th ball valve is installed between the second surge tank；The tenth self-sealing joint is installed by pipeline in the second compressor opposite side；Second
One upper lateral part of surge tank sets the 7th self-sealing joint and the second check valve by pipeline, the 7th self-sealing joint and the 5th self-styled
Connector connects, the tenth self-sealing joint and the connection of the 6th self-sealing joint；It installs and subtracts between submerged membrane separation tank and the second surge tank
Pressure valve sets the 8th self-sealing joint on the outside of submerged membrane separation tank, passes through respectively in another side lower part of second surge tank and bottom
The 4th check valve, the 9th self-sealing joint and the 6th ball valve, the 11st self-sealing joint that pipeline is set, the 8th self-sealing joint and the 9th
Self-sealing joint is connected respectively with nitrogen gas recovering apparatus, the 11st self-sealing joint and SF6Another side interface of gas analyzer connects
It connects；3rd pressure sensor and the 3rd pressure gauge are set at the top of the second surge tank, the second surge tank and the 3rd pressure gauge it
Between set and the 3rd screw valve and the 3rd safety valve；Second compressor is oilless (oil free) compressor；In being loaded in the submerged membrane separation tank
Hollow fiber gas separation membrane.
Nitrogen gas recovering apparatus described in apparatus of the present invention includes the N being connected by pipeline2Gas bomb, the 3rd compressor and nitrogen
Gas tank；The 12nd self-sealing joint and the 5th solenoid valve, the N are set by pipeline on the outside of the 3rd compressor2Gas bomb and company
It is arranged on the pipeline between the 12nd self-sealing joint and the 5th solenoid valve, in the N2Gas bomb top is installed by the 5th ball valve；
12nd self-sealing joint and the connection of the 9th self-sealing joint, pass through pipeline respectively in the nitrogen pot opposite side upper and lower part
6th solenoid valve, the 13rd self-sealing joint and the 7th ball valve, the 14th self-sealing joint, the 13rd self-sealing joint and are set
Eight self-sealing joints connect, the 14th self-sealing joint and SF6Gas detecting instrument connects；4th pressure is set at the top of nitrogen pot
Sensor and the 4th pressure gauge set the 4th to screw valve and the 4th safety valve between nitrogen pot and the 4th pressure gauge；3rd pressure
Contracting machine is oilless (oil free) compressor, and inlet induction pressure 0.05MPa~2MPa, outlet gas pressure is more than 12.5MPa.
SF described in apparatus of the present invention6The model RA912FSF of gas analyzer6；The model PGD1-A- of gas detecting instrument
SF6。
SF of the present invention6And N2The quick recovery and treatment method of mixed gas, using following steps：
Step (1), by SF6And N2Mixed gas reclaiming clean：
All kinds of valves are ensured before work all in off position, by non-return valve and the SF that need to be recycled6And N2Mixed gas container
It is connected, opens the first ball valve and first and screw valve, SF6And N2Mixed gas passes through drying chamber, filtering tank and the first surge tank successively
It is purified, passes through the first surge tank of first pressure Sensor monitoring (205) interior SF6And N2The pressure of mixed gas；Open second
Ball valve opens SF6Gas analyzer measures SF6Gas purity, micro- water and decomposition product, purified SF6And N2Mixed gas water
Point content should be less than 150 μ L/L, and sulfur dioxide volume fraction content should be less than 1 μ L/L, and hydrogen sulfide volume fraction content should be less than 1
μ L/L, above-mentioned three indexs should replace the molecular sieve of filling in drying chamber when not reaching requirement；
Step (2), SF6Gas condensation purification：
It opens second to screw valve and open refrigeration machine, opens the first solenoid valve, start the first compressor, it is unidirectional to open first
Valve, SF6And N2Mixed gas enters in drainer, the SF after being overpressurized and cooling down6And N2The SF in the big portion in mixed gas6Gas
Condensation becomes liquid, the SF of liquid6Gas enters purification tank by pipeline, and the mass ratio that purification tank is measured using weighing apparatus is worked
Increase before starting and be more than double centner, when the pressure that the 5th pressure sensor measures in purification tank is more than 5MPa, close the first compression
Machine and the first check valve open the 3rd ball valve, and liquid sulfur hexafluoride is canned to SF6In gas bomb；It is measured and carried using weighing apparatus
The mass ratio work of pure tank increases before starting is less than 30 kilograms, and the pressure that the 5th pressure sensor measures purification tank is less than 2MPa
When, the 3rd ball valve is closed, opens the first solenoid valve, the first compressor and the first check valve, then SF6Gas condensation purification continue into
Row；
Step (3), SF6And N2Mixed gas separates：
When the pressure that second pressure sensor measures drainer is more than 3MPa, the 4th solenoid valve, the second check valve, the are opened
Three screw valve, the 4th screw valve, pressure reducing valve and the 6th solenoid valve, contain fraction SF6The SF of gas6And N2Mixed gas enters
Second surge tank, SF6And N2Mixed gas enters submerged membrane separation tank after pressure reducing valve depressurizes, in being loaded in submerged membrane separation tank
Hollow fiber gas separation membrane is by SF6Gas and N2Gas separates, N2Gas by after Ho llow fiber membrane for gas separation by submerged membrane separation tank
Into in nitrogen pot；When 3rd pressure sensor measures in the second surge tank pressure and is more than 4MPa, the 6th ball valve is opened, is utilized
SF6Gas analyzer measures SF6When gas purity is more than 40%, opens the 4th ball valve, the 3rd check valve and start the second compression
Machine, by the SF in the second surge tank6And N2Mixed gas reverse compression repeats step (2) into drainer；3rd pressure passes
When sensor measures in the second surge tank pressure and is more than 5MPa, open the 4th ball valve, the 3rd check valve and start the second compressor, it will
SF in second surge tank6And N2Mixed gas reverse compression repeats step (2) into drainer；3rd pressure sensor
When measuring in the second surge tank pressure and being less than 2MPa, the 4th ball valve is closed, close the 3rd check valve and closes the second compressor, is kept away
It is low to exempt from air pressure in the second surge tank；
Step (4), N2Gas purification is simultaneously canned：
When 4th pressure sensor detection nitrogen pressure inside the tank is more than 5MPa, the 7th ball valve is opened, utilizes SF6Gas detects
The SF of gas in instrument measurement nitrogen pot6Void fraction；SF in nitrogen pot6When gas content is not more than 100 μ L/L, the is opened
Five solenoid valves, the 5th ball valve and the 3rd compressor, by N in nitrogen pot2Gas compression is to N2In gas bomb；Gas in nitrogen pot
SF6When gas content is more than 100 μ L/L, the 5th solenoid valve, the 4th check valve and the 3rd compressor are opened, by the SF in nitrogen pot6
And N2Mixed gas is compressed in the second surge tank, repeats step (3)；4th pressure sensor detection nitrogen pressure inside the tank is small
When 2MPa, the 7th ball valve, the 5th solenoid valve and the 3rd compressor are closed, avoids air pressure in nitrogen pot low.
Good effect of the present invention is as follows：
1st, SF of the present invention6And N2The quick recycling and processing device of mixed gas is in SF6Gas condensation purification, SF6And N2Gaseous mixture
Return circuit is provided in body separation process, by the SF in the second surge tank6And N2Mixed gas reverse compression is heavy to drainer
Condensation purification newly is carried out, realizes SF to greatest extent6Gas recycles.
2. SF of the present invention6And N2The quick recycling and processing device of mixed gas is in SF6And N2Mixed gas separation, N2It purifies canned
Return circuit is provided in the process, by the SF of gas in nitrogen pot6Gas volume fraction content is more than SF during 100 μ L/L6And N2
Mixed gas is compressed to the second surge tank, re-starts gas separation, reduces SF to greatest extent6It is mixed into N2In and finally discharge
Into air, SF is reduced6Greenhouse gas emissions.
3. SF of the present invention6And N2The quick recovery and treatment method of mixed gas efficiently uses SF6The compressible liquefaction of gas, Yi Leng
But liquefy, N2It can not compress and liquefy, be not easy the characteristics of cooling liquid, take compression condensation separation and polymeric membrane isolation technics,
Recovery processing speed is improved, realizes SF6And N2Mixed gas is quickly recycled.
4. SF of the present invention6And N2SF in the quick recovery and treatment method of mixed gas6And N2It is carried out before mixed gas recovery processing
Dry filter purification, SF6Gas is using directly canned, N after liquefaction2Gas compression is canned, SF6And N2Purity is higher.At recycling
SF after reason6Gas meets GB/T 12022《Industrial sulfur hexafluoride》New gas standard requirement, the N after recovery processing2Purity >=
99.9%, which meets electrical equipment mix insulation gas tank and fills requirement, realizes SF6And N2Mix insulation gas
Body circulation recycles.
Description of the drawings
Attached drawing 1 is schematic structural view of the invention；
Attached drawing 2 is dry filtrating equipment structure diagram of the present invention；
Attached drawing 3 is SF of the present invention6Retracting device structure diagram；
Attached drawing 4 is gas fractionation unit structure diagram of the present invention；
Attached drawing 5 is nitrogen gas recovering apparatus structure diagram of the present invention.
Specific embodiment
As shown in attached drawing 1-5, SF of the present invention6And N2The quick recycling and processing device of mixed gas, including being connected successively by pipeline
Non-return valve 1, dry filtrating equipment 2, the SF connect6Retracting device 3, gas fractionation unit 4 and nitrogen gas recovering apparatus 5；Dried
SF is installed by pipeline on filter device 2 and gas fractionation unit 46Gas analyzer 6 passes through pipeline on nitrogen gas recovering apparatus 5
SF is installed6Gas detecting instrument 7.The SF6The model RA912F II of gas analyzer 6 is, it can be achieved that SF6Gas purity, micro- water and
Decompose analyte detection；SF6The model PGD1-A-SF of gas detecting instrument 76, the SF6Gas detecting instrument can realize SF6Gas is micro
Concentration Testing.
SF of the present invention6And N2The quick recycling and processing device of mixed gas, the dry filtrating equipment 2 include by pipeline according to
The first self-sealing joint 201, the first ball valve 202, drying chamber 203,204 and first surge tank 205 of filtering tank of secondary connection；First certainly
5th pressure gauge 214 between 201 and first ball valve 202 of sealing joint is installed, passes through pipe respectively in 205 side of the first surge tank
Road sets the second self-sealing joint 207 and the 3rd self-sealing joint 208, pacifies between the first surge tank 205 and the second self-sealing joint 207
The first solenoid valve 206 is filled, second ball valve 211 is installed between the first surge tank 205 and the 3rd self-sealing joint 208, second is self-styled
Connector 207 and SF6Retracting device 3 connects, the 3rd self-sealing joint 208 and SF66 one side interface of gas analyzer connects；Described
One surge tank, 205 top sets first pressure sensor 209 and first pressure gauge 210 by pipeline respectively；In the first surge tank
First is set to screw 212 and first safety valve 213 of valve between 205 and first pressure gauge 210；It is loaded in the drying chamber 203
The molecular sieve of model 5A；HEPA filtering steel wire racks are loaded in the filtering tank 204, filtering accuracy is less than 0.5 μm.
The drying chamber 203 and filtering tank 204 are stainless steel shell, and tank body wall thickness 6mm, volume 50L work
Pressure is 2MPa；First surge tank 205 is stainless steel shell, tank body wall thickness 6mm, volume 60L, and operating pressure is
2MPa；First safety valve, the 213 setting valve 3MPa；209 measurement range of first pressure sensor is 0MPa~3MPa, smart
It spends for ± 0.01MPa.
SF of the present invention6And N2The quick recycling and processing device of mixed gas, the SF6Retracting device 3 is included through pipeline successively
The first compressor 301, drainer 302, purification tank 303 and the SF of connection6Gas bomb 304；The drainer 302 is arranged on purification
303 top of tank, the bottom of drainer 302 are connected with 303 top of purification tank, and system is installed between drainer 302 and purification tank 303
Cold 307；The first thermal heat exchanger 322 being connected with refrigeration machine 307 in 302 side of drainer is set, purifies tank 303
The second thermal heat exchanger 321 being connected with refrigeration machine 307 is set in top；First thermal heat exchanger 322 and the second heating power exchange
Refrigerant is provided by refrigeration machine 307 used in device 321；First compressor, 301 one side sets the 4th self-sealing joint by pipeline
305, the 4th self-sealing joint 305 is connected with the second self-sealing joint 207；First compressor, 301 opposite side and drainer 302 it
Between the first check valve 306 is set；First compressor, 301 opposite side is connected with 306 input terminal of the first check valve, drainer
302 are connected with 306 output terminal of the first check valve；The 5th pressure sensor 308 and the first temperature sensing are set on purification tank 303
Device 309；Second pressure sensor 310 and second pressure gauge 311 are set at 302 top of drainer, pressed in drainer 302 and second
Second is set to screw 312 and second safety valve 313 of valve between power table 311；Pass through pipeline respectively in 302 opposite side of drainer
5th self-sealing joint 314, the 6th self-sealing joint 315 and second temperature sensor 319, the 5th self-sealing joint 314 and the 6th are set
Self-sealing joint 315 is connected respectively with gas fractionation unit 4, and the 4th electricity is installed between 302 and the 5th self-sealing joint 314 of drainer
Magnet valve 316 installs the 3rd check valve 317 between 302 and the 6th self-sealing joint 315 of drainer；6th self-sealing joint 315
It is connected with the input terminal of the 3rd check valve 317, the drainer 302 is connected with the output terminal of the 3rd check valve 317；In SF6Storage
The 3rd ball valve 318 is installed between gas cylinder 304 and purification tank 303；In 303 bottom of purification tank, weighing apparatus 320 are set.
First compressor 301 be oilless (oil free) compressor, inlet induction pressure 0.05MPa~1.0MPa, exit gas pressure
Power is more than 5MPa；The model CWZ-75 of the refrigeration machine 307, refrigeration depth are -40 DEG C, and the refrigerant of refrigeration is absolute ethyl alcohol；
First thermal heat exchanger 322 is the coiled pipe exchanger of stainless steel, and the second thermal heat exchanger 321 is stainless steel
Coiled pipe exchanger；The drainer 302 and purification 303 material of tank are stainless steel, tank body wall thickness 8mm, and operating pressure is
5.0MPa, volume 50L；310 measurement range of second pressure sensor is 0MPa~6.0MPa, and precision is ± 0.01MPa；
Second safety valve, 313 setting valve is 6.0MPa；319 measurement range of second temperature sensor is -100~50 DEG C, essence
It spends for ± 0.5 DEG C；5th pressure sensor, 308 measurement range is 0MPa~6.0MPa, and precision is ± 0.01MPa；It is described
First temperature sensor, 309 measurement range is -100~50 DEG C, and precision is ± 0.5 DEG C.
SF of the present invention6And N2The quick recycling and processing device of mixed gas, the gas fractionation unit 4 include the second surge tank
401st, it is arranged on the second compressor 402 of 401 1 side lower part of the second surge tank by pipeline and is arranged on second by pipeline and delays
Rush the submerged membrane separation tank 403 of 401 another upper lateral part of tank；4th ball valve is installed between the second compressor 402 and the second surge tank 401
404；The tenth self-sealing joint 405 is installed by pipeline in 402 opposite side of the second compressor；In 401 1 upper lateral part of the second surge tank
7th self-sealing joint 406 and the second check valve 407, the 7th self-sealing joint 406 and the second check valve 407 are set by pipeline
Input terminal be connected, second surge tank 401 is connected with the output terminal of the second check valve 407, the 7th self-sealing joint 406
It is connected with the 5th self-sealing joint 314, the tenth self-sealing joint 405 and the 6th self-sealing joint 315 connect；In submerged membrane separation tank 403
And second install pressure reducing valve 408 between surge tank 401, the 8th self-sealing joint 409 is set in 403 outside of submerged membrane separation tank, described
The 4th check valve 410, the 9th self-sealing joint 411 that second surge tank, 401 another side lower part and bottom are set respectively by pipeline
With the 6th ball valve 412, the 11st self-sealing joint 413, the 8th self-sealing joint 409 and the 9th self-sealing joint 411 return respectively with nitrogen
Receiving apparatus 5 connects；9th self-sealing joint 411 is connected with the input terminal of the 4th check valve 410, second surge tank 401
It is connected with the output terminal of the 4th check valve 410；11st self-sealing joint 413 and SF66 another side interface of gas analyzer connects
It connects；The 3rd pressure sensor 414 and the 3rd pressure gauge 415 are set at 401 top of the second surge tank, in 401 He of the second surge tank
The 3rd is set to screw 416 and the 3rd safety valve 417 of valve between 3rd pressure gauge 415；Second surge tank, 401 material is stainless
Steel, tank body wall thickness 8mm, operating pressure 5.0MPa, volume 50L；3rd pressure sensor, 414 measurement range is 0MPa
~6.0MPa, precision are ± 0.01MPa；3rd safety valve, 417 setting valve is 6.0MPa；Second compressor 402 is
Oilless (oil free) compressor, inlet induction pressure 0.05MPa~1MPa, outlet gas pressure are more than 5MPa；403 material of submerged membrane separation tank
For stainless steel casing, tank body wall thickness 6mm, operating pressure 2.0MPa, volume 50L, interior filling Ho llow fiber membrane for gas separation.
SF of the present invention6And N2The quick recycling and processing device of mixed gas, the nitrogen gas recovering apparatus 5 are included through pipeline phase
The N of connection2Gas bomb 501, the 3rd compressor 502 and nitrogen pot 503；In the outside of the 3rd compressor 502 the is set by pipeline
12 self-sealing joints 506 and the 5th solenoid valve 504, the N2Gas bomb 501 is simultaneously even arranged on the 12nd self-sealing joint 506 and the
On pipeline between five solenoid valves 504, in the N2501 top of gas bomb is installed by the 5th ball valve 505；Described 12nd from sealing-in
First 506 and the 9th self-sealing joint 411 connect, set the by pipeline respectively in the 503 opposite side upper and lower part of nitrogen pot
Six solenoid valves 507, the 13rd self-sealing joint 508 and the 7th ball valve 509, the 14th self-sealing joint 510, the described 13rd from sealing-in
First 508 are connected with the 8th self-sealing joint 409, the 14th self-sealing joint 510 and SF6Gas detecting instrument 7 connects；In nitrogen pot
503 tops set the 4th pressure sensor 511 and the 4th pressure gauge 512, are set between 503 and the 4th pressure gauge 512 of nitrogen pot
It puts the 4th and screws 513 and the 4th safety valve 514 of valve.
503 material of nitrogen pot be stainless steel, tank body wall thickness 8mm, operating pressure 5.0MPa, volume 50L；It is described
4th pressure sensor, 511 measurement range is 0MPa~6.0MPa, and precision is ± 0.01MPa；4th safety valve 514 is adjusted
It is worth for 6.0MPa；3rd compressor 502 be oilless (oil free) compressor, inlet induction pressure 0.05MPa~2MPa, exit gas pressure
Power is more than 12.5MPa.
SF of the present invention6And N2The quick recycling and processing device of mixed gas is in SF6Gas condensation purification, SF6And N2Mixed gas
Return circuit is provided in separation process, by the SF in the second surge tank6And N2Mixed gas reverse compression is to drainer, again
Condensation purification is carried out, realizes SF to greatest extent6Gas recycles；SF of the present invention6And N2The quick recycling and processing device of mixed gas exists
SF6And N2Mixed gas separation, N2It purifies and return circuit is provided in canning process, by the SF of gas in nitrogen pot6Gas content
SF during more than 100 μ L/L6And N2Mixed gas is compressed to the second surge tank, re-starts gas separation, reduces to greatest extent
SF6It is mixed into N2In and be finally discharged into air, reduce SF6Greenhouse gas emissions.
SF of the present invention6And N2The quick recovery and treatment method of mixed gas, using following steps：
Step (1), by SF6And N2Mixed gas reclaiming clean：
All kinds of valves are ensured before work all in off position, by non-return valve 1 and the SF that need to be recycled6And N2Mixed gas is held
Device is connected, and opens the first ball valve 202 and first and screws valve 212, SF6And N2Mixed gas is successively by drying chamber 203, filtering tank
204 and first surge tank 205 purified, pass through first pressure sensor 209 monitor the first surge tank 205 in SF6And N2Mixing
The pressure of gas；The second ball valve 211 is opened, opens SF6Gas analyzer 6, measures SF6Gas purity, micro- water and decomposition product, only
SF after change6And N2Mixed gas moisture should be less than 150 μ L/L, and content of sulfur dioxide should be less than 1 μ L/L, hydrogen sulfide content
1 μ L/L are should be less than, above-mentioned three indexs should replace the molecular sieve of filling in drying chamber 203 when standard is not achieved；
Step (2), SF6Gas condensation purification：
It opens second to screw valve (312) and open refrigeration machine 307, opens the first solenoid valve 206, start the first compressor
301, open the first check valve 306, SF6And N2Mixed gas enters in drainer 302, the SF after being overpressurized and cooling down6And N2It is mixed
Close the SF in the big portion in gas6Gas condensation becomes liquid, the SF of liquid6Gas enters purification tank 303 by pipeline, utilizes title
The mass ratio work that treasure 320 measures purification tank 303 starts preceding increase more than double centner, and the 5th pressure sensor 308, which measures, to be carried
When pressure in pure tank 303 is more than 5MPa, the first compressor 301 and the first check valve 306 are closed, opens the 3rd ball valve 318, it will
Liquid sulfur hexafluoride is canned to SF6In gas bomb 304；Using weighing apparatus 320 measure purification tank 303 mass ratio work start before
Increase and be less than 30 kilograms, when the pressure that the 5th pressure sensor 308 measures purification tank 303 is less than 2MPa, close the 3rd ball valve
318, the first solenoid valve 206, the first compressor 301 and the first check valve 306 are opened, then SF6Gas condensation purification continues；
Step (3), SF6And N2Mixed gas separates：
When the pressure that second pressure sensor 310 measures drainer 302 is more than 3MPa, the 4th solenoid valve 316, second is opened
Check valve the 407, the 3rd screws valve the 416, the 4th and screws valve 513,408 and the 6th solenoid valve 507 of pressure reducing valve, contains fraction SF6
The SF of gas6And N2Mixed gas enters the second surge tank 401, SF6And N2Mixed gas enters after the decompression of pressure reducing valve 408
Submerged membrane separation tank 403, using the Ho llow fiber membrane for gas separation loaded in submerged membrane separation tank 403 by SF6Gas and N2Gas separates, N2
Gas after Ho llow fiber membrane for gas separation by submerged membrane separation tank 403 by being entered in nitrogen pot (503)；3rd pressure sensor 414
When measuring in the second surge tank 401 pressure and being more than 4MPa, the 6th ball valve 412 is opened, utilizes SF6Gas analyzer 6 measures SF6Gas
It when body purity is more than 40%, opens the 4th ball valve 404, the 3rd check valve 317 and starts the second compressor 402, by the second buffering
SF in tank 4016And N2Mixed gas reverse compression repeats step (2) into drainer 302；
When 3rd pressure sensor 414 measures in the second surge tank 401 pressure and is more than 5MPa, the 4th ball valve 404, the are opened
The second compressor 402 of three check valves 317 and startup, by the SF in the second surge tank 4016And N2Mixed gas reverse compression is to cold
In solidifying tank 302, step (2) is repeated；
When 3rd pressure sensor 414 measures in the second surge tank 401 pressure and is less than 2MPa, close the 4th ball valve 404, close
It closes the 3rd check valve 317 and closes the second compressor 402, avoid air pressure in the second surge tank 401 low；In order to avoid influence doughnut
The normal work of gas separation membrane；
Step (4), N2Gas purification is simultaneously canned：
When pressure is more than 5MPa in 4th pressure sensor 511 detection nitrogen pot 503, the 7th ball valve 509 is opened, is utilized
SF6Gas detecting instrument 7 measures the SF of gas in nitrogen pot 5036Void fraction；SF in nitrogen pot 5036Gas content is little
When 100 μ L/L, the 5th solenoid valve 504, the 5th ball valve 505 and the 3rd compressor 502 are opened, by N in nitrogen pot 5032Gas
It is compressed to N2In gas bomb 501；The SF of gas in nitrogen pot 5036When gas content is more than 100 μ L/L, the 5th solenoid valve is opened
504th, the 4th check valve 410 and the 3rd compressor 502, by the SF in nitrogen pot 5036And N2Mixed gas is compressed to the second buffering
In tank 401, step (3) is repeated；
When pressure is less than 2MPa in 4th pressure sensor 511 detection nitrogen pot 503, the 509, the 5th electricity of the 7th ball valve is closed
Magnet valve (504) and the 3rd compressor 502 avoid air pressure in nitrogen pot 503 low.In order to avoid it influences in being loaded in submerged membrane separation tank 403
The normal work of hollow fiber gas separation membrane.
SF of the present invention6And N2The quick recovery and treatment method of mixed gas efficiently uses SF6The compressible liquefaction of gas, easily cooling
Liquefaction, N2It can not compress and liquefy, be not easy the characteristics of cooling liquid, take compression condensation separation and polymeric membrane isolation technics, carry
High recovery processing speed, realizes SF6And N2Mixed gas is quickly recycled；SF of the present invention6And N2Mixed gas is quickly returned
SF in receiving processing method6And N2Dry filter purification, SF have been carried out before mixed gas recovery processing6Gas is using direct after liquefaction
It is canned, N2Gas compression is canned, SF6And N2Purity is higher.SF after recovery processing6Gas meets GB/T 12022《Industrial hexafluoro
Change sulphur》New gas standard requirement, the N after recovery processing2Purity >=99.9%, it is exhausted which meets electrical equipment mixing
Edge gas tank fills requirement, realizes SF6And N2Mix insulation gas circulation recycles.
Claims (7)
1. a kind of SF6And N2The quick recycling and processing device of mixed gas, it is characterised in that it includes sequentially connected inverse by pipeline
Only valve (1), dry filtrating equipment (2), SF6Retracting device (3), gas fractionation unit (4) and nitrogen gas recovering apparatus (5)；Dry
SF is installed by pipeline on dry filter device (2) and gas fractionation unit (4)6Gas analyzer (6), in nitrogen gas recovering apparatus
(5) SF is installed by pipeline on6Gas detecting instrument (7).
2. a kind of SF according to claim 16And N2The quick recycling and processing device of mixed gas, it is characterised in that described dry
Dry filter device (2) is included through sequentially connected first self-sealing joint (201) of pipeline, the first ball valve (202), drying chamber
(203), filtering tank (204) and the first surge tank (205)；Is installed between first self-sealing joint (201) and the first ball valve (202)
Five pressure gauges (214) set the second self-sealing joint (207) and the by pipeline respectively in the first surge tank (205) side
Three self-sealing joints (208) install the first solenoid valve (206) between the first surge tank (205) and the second self-sealing joint (207),
Second ball valve (211) is installed between the first surge tank (205) and the 3rd self-sealing joint (208), the second self-sealing joint (207) with
SF6Retracting device (3) connects, the 3rd self-sealing joint (208) and SF6(6) one side interface of gas analyzer connects；
First pressure sensor (209) and first pressure gauge are set by pipeline respectively on the first surge tank (205) top
(210)；First is set to screw valve (212) and the first safety valve between the first surge tank (205) and first pressure gauge (210)
(213)；
The molecular sieve of model 5A is loaded in the drying chamber (203)；HEPA filter screens are loaded in the filtering tank (204)
Core, filtering accuracy are less than 0.5 μm.
3. a kind of SF according to claim 26And N2The quick recycling and processing device of mixed gas, it is characterised in that the SF6
Retracting device (3) is included through sequentially connected first compressor (301) of pipeline, drainer (302), purification tank (303) and SF6
Gas bomb (304)；The drainer (302) is arranged on above purification tank (303), bottom and the purification tank of drainer (302)
(303) top is connected, and refrigeration machine (307) is installed between drainer (302) and purification tank (303)；In the drainer (302)
The first thermal heat exchanger (322) being connected with refrigeration machine (307), the interior setting in purification tank (303) top and refrigeration are set in side
The second thermal heat exchanger (321) of machine (307) connection；
First compressor (301) one side by pipeline set the 4th self-sealing joint (305), the 4th self-sealing joint (305) with
Second self-sealing joint (207) connects；First is set between first compressor (301) opposite side and drainer (302) unidirectionally
Valve (306)；
5th pressure sensor (308) and the first temperature sensor (309) are set on purification tank (303)；
Second pressure sensor (310) and second pressure gauge (311) are set at the top of the drainer (302), in drainer (302) and
Second is set to screw valve (312) and the second safety valve (313) between second pressure gauge (311)；
The 5th self-sealing joint (314), the 6th self-sealing joint are set by pipeline respectively in the drainer (302) opposite side
(315) separated respectively with gas with second temperature sensor (319), the 5th self-sealing joint (314) and the 6th self-sealing joint (315)
Device (4) connects, and the 4th solenoid valve (316) is installed between drainer (302) and the 5th self-sealing joint (314), in drainer
(302) the 3rd check valve (317) is installed between the 6th self-sealing joint (315)；
In SF63rd ball valve (318) is installed between gas bomb (304) and purification tank (303)；It sets and claims in purification tank (303) bottom
Treasure (320)；
The model CWZ-75 of refrigeration machine (307), refrigeration depth are -40 DEG C；
First compressor (301) is oilless (oil free) compressor.
4. a kind of SF according to claim 36And N2The quick recycling and processing device of mixed gas, it is characterised in that the gas
Body separator (4) includes the second surge tank (401), the second of (401) one side lower part of the second surge tank is arranged on by pipeline
Compressor (402) and the submerged membrane separation tank (403) that the second surge tank (401) another upper lateral part is arranged on by pipeline；
4th ball valve (404) is installed between the second compressor (402) and the second surge tank (401)；
The tenth self-sealing joint (405) is installed by pipeline in the second compressor (402) opposite side；
The 7th self-sealing joint (406) and the second check valve (407) are set by pipeline in (401) one upper lateral part of the second surge tank,
7th self-sealing joint (406) and the connection of the 5th self-sealing joint (314), the tenth self-sealing joint (405) and the 6th self-styled
Connector (315) connects；
Pressure reducing valve (408) between submerged membrane separation tank (403) and the second surge tank (401) is installed, is set on the outside of submerged membrane separation tank (403)
The 8th self-sealing joint (409) is put, the set respectively by pipeline in another side lower part of second surge tank (401) and bottom
Four check valves (410), the 9th self-sealing joint (411) and the 6th ball valve (412), the 11st self-sealing joint (413), the 8th from sealing-in
Head (409) and the 9th self-sealing joint (411) be connected respectively with nitrogen gas recovering apparatus (5), the 11st self-sealing joint (413) and
SF6Another side interface connection of gas analyzer (6)；
3rd pressure sensor (414) and the 3rd pressure gauge (415) are set at the top of the second surge tank (401), in the second buffering
The 3rd is set to screw valve (416) and the 3rd safety valve (417) between tank (401) and the 3rd pressure gauge (415)；
Second compressor (402) is oilless (oil free) compressor；Hollow fiber gas separation is loaded in the submerged membrane separation tank (403)
Film.
5. a kind of SF according to claim 46And N2The quick recycling and processing device of mixed gas, it is characterised in that the nitrogen
Gas recovering device (5) includes the N being connected by pipeline2Gas bomb (501), the 3rd compressor (502) and nitrogen pot (503)；
The 12nd self-sealing joint (506) and the 5th solenoid valve (504), institute are set by pipeline on the outside of the 3rd compressor (502)
State N2Gas bomb (501) is simultaneously even arranged on the pipeline between the 12nd self-sealing joint (506) and the 5th solenoid valve (504),
The N2Gas bomb (501) top is installed by the 5th ball valve (505)；12nd self-sealing joint (506) and the 9th self-sealing joint
(411) connect,
The 6th solenoid valve (507), the 13rd are set certainly by pipeline respectively in the nitrogen pot (503) opposite side upper and lower part
Sealing joint (508) and the 7th ball valve (509), the 14th self-sealing joint (510),
13rd self-sealing joint (508) is connected with the 8th self-sealing joint (409), the 14th self-sealing joint (510) with
SF6Gas detecting instrument (7) connects；
4th pressure sensor (511) and the 4th pressure gauge (512) are set at the top of the nitrogen pot (503), in nitrogen pot (503) and
The 4th is set to screw valve (513) and the 4th safety valve (514) between 4th pressure gauge (512)；
3rd compressor (502) is oilless (oil free) compressor, and inlet induction pressure 0.05MPa~2MPa, outlet gas pressure is more than
12.5MPa。
6. a kind of SF according to claim 16And N2The quick recycling and processing device of mixed gas, it is characterised in that the SF6
The model RA912F (II) of gas analyzer (6), SF6The model PGD1-A-SF of gas detecting instrument (7)6。
7. a kind of SF6And N2The quick recovery and treatment method of mixed gas, it is characterised in that using following steps：
Step (1), by SF6And N2Mixed gas reclaiming clean：
All kinds of valves are ensured before work all in off position, by non-return valve (1) and the SF that need to be recycled6And N2Mixed gas container
It is connected, opens the first ball valve (202) and first and screw valve (212), SF6And N2Mixed gas is successively by drying chamber (203), mistake
Filter tank (204) and the first surge tank (205) are purified, and the first surge tank (205) is monitored by first pressure sensor (209)
Interior SF6And N2The pressure of mixed gas；
The second ball valve (211) is opened, opens SF6Gas analyzer (6), measures SF6Gas purity, micro- water and decomposition product, after purification
SF6And N2Mixed gas moisture should be less than 150 μ L/L, and sulfur dioxide should be less than 1 μ L/L, and hydrogen sulfide content should be less than 1 μ
L/L, above-mentioned three indexs should replace the molecular sieve of filling in drying chamber (203) when not reaching requirement；
Step (2), SF6Gas condensation purification：
It opens second to screw valve (312) and open refrigeration machine (307), opens the first solenoid valve (206), start the first compressor
(301), the first check valve (306), SF are opened6And N2Mixed gas enters in drainer (302), the SF after being overpressurized and cooling down6
And N2The SF in the big portion in mixed gas6Gas condensation becomes liquid, the SF of liquid6Gas enters purification tank by pipeline
(303), the mass ratio work for purification tank (303) being measured using weighing apparatus (320) starts preceding increase more than double centner, the 5th pressure
When the pressure that force snesor (308) measures in purification tank (303) is more than 5MPa, the first compressor (301) and first is closed unidirectionally
Valve (306) opens the 3rd ball valve (318), and liquid sulfur hexafluoride is canned to SF6In gas bomb (304)；Utilize weighing apparatus
(320) the mass ratio work for measuring purification tank (303) starts preceding increase less than 30 kilograms, and the 5th pressure sensor (308) measures
When purifying the pressure of tank (303) less than 2MPa, the 3rd ball valve (318) is closed, opens the first solenoid valve (206), the first compressor
(301) and the first check valve (306), then SF6Gas condensation purification continues；
Step (3), SF6And N2Mixed gas separates：
When the pressure that second pressure sensor (310) measures drainer (302) is more than 3MPa, the 4th solenoid valve (316), the are opened
Two check valves (407), the 3rd screw valve (416), the 4th screw valve (513), pressure reducing valve (408) and the 6th solenoid valve (507), contain
There is fraction SF6The SF of gas6And N2Mixed gas enters the second surge tank (401), SF6And N2Mixed gas passes through pressure reducing valve
(408) into submerged membrane separation tank (403) after depressurizing, using the Ho llow fiber membrane for gas separation loaded in submerged membrane separation tank (403) by SF6
Gas and N2Gas separates, N2Gas by submerged membrane separation tank (403) after Ho llow fiber membrane for gas separation by entering nitrogen pot (503)
In；
When 3rd pressure sensor (414) measures in the second surge tank (401) pressure and is more than 4MPa, the 6th ball valve (412) is opened,
Utilize SF6Gas analyzer (6) measures SF6When gas purity is more than 40%, the 4th ball valve (404), the 3rd check valve are opened
(317) and the second compressor (402) is started, by the SF in the second surge tank (401)6And N2Mixed gas reverse compression extremely condenses
In tank (302), step (2) is repeated；
When 3rd pressure sensor (414) measures in the second surge tank (401) pressure and is more than 5MPa, open the 4th ball valve (404),
3rd check valve (317) and the second compressor of startup (402), by the SF in the second surge tank (401)6And N2Mixed gas is reversed
It is compressed in drainer (302), repeats step (2)；
When 3rd pressure sensor (414) measures in the second surge tank (401) pressure and is less than 2MPa, close the 4th ball valve (404),
It closes the 3rd check valve (317) and closes the second compressor (402), avoid the second surge tank (401) interior air pressure low；
Step (4), N2Gas purification is simultaneously canned：
When 4th pressure sensor (511) detection nitrogen pot (503) interior pressure is more than 5MPa, the 7th ball valve (509) is opened, is utilized
SF6Gas detecting instrument (7) measures the SF of nitrogen pot (503) interior gas6Void fraction；Nitrogen pot (503) interior SF6Gas contains
When amount is no more than 100 μ L/L, the 5th solenoid valve (504), the 5th ball valve (505) and the 3rd compressor (502) are opened, by nitrogen pot
(503) interior N2Gas compression is to N2In gas bomb (501)；The SF of nitrogen pot (503) interior gas6Gas content is more than 100 μ L/L
When, the 5th solenoid valve (504), the 4th check valve (410) and the 3rd compressor (502) are opened, by the SF in nitrogen pot (503)6
And N2Mixed gas is compressed in the second surge tank (401), repeats step (3)；
When 4th pressure sensor (511) detection nitrogen pot (503) interior pressure is less than 2MPa, the 7th ball valve (509), the 5th are closed
Solenoid valve (504) and the 3rd compressor (502) avoid nitrogen pot (503) interior air pressure low.
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| CN109276976A (en) * | 2018-12-05 | 2019-01-29 | 国家电网有限公司 | A kind of recyclable device and method of sulfur hexafluoride and nitrogen mixed gas |
| CN111547685A (en) * | 2020-04-10 | 2020-08-18 | 国网河北省电力有限公司电力科学研究院 | Low concentration SF in enclosed space6Gas recovery processing device and method |
| CN113074320A (en) * | 2021-03-19 | 2021-07-06 | 国网新疆电力有限公司检修公司 | SF (sulfur hexafluoride)6/CF4High-purity separation and recovery device and method for mixed gas |
| CN113915519A (en) * | 2021-10-19 | 2022-01-11 | 国网安徽省电力有限公司电力科学研究院 | Zero-emission anti-deformation ring main unit insulating gas recovery device and method |
| CN114100310A (en) * | 2021-12-02 | 2022-03-01 | 国网安徽省电力有限公司电力科学研究院 | SF under sudden failure in GIL pipe gallery6Quick recovery system and device for gas leakage |
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| CN114857492A (en) * | 2022-04-19 | 2022-08-05 | 安徽新力电业科技咨询有限责任公司 | Sectional type pressurization and continuous storage SF 6 On-site gas recovery device |
| CN114857492B (en) * | 2022-04-19 | 2023-10-31 | 安徽新力电业科技咨询有限责任公司 | Sectional type supercharged and continuously stored SF 6 Gas on-site recovery device |
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