CN107281896A - Low concentration sulfur hexafluoride gas retracting device and its recovery method - Google Patents
Low concentration sulfur hexafluoride gas retracting device and its recovery method Download PDFInfo
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- CN107281896A CN107281896A CN201710515224.XA CN201710515224A CN107281896A CN 107281896 A CN107281896 A CN 107281896A CN 201710515224 A CN201710515224 A CN 201710515224A CN 107281896 A CN107281896 A CN 107281896A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
- B01D53/047—Pressure swing adsorption
- B01D53/053—Pressure swing adsorption with storage or buffer vessel
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/40—Further details for adsorption processes and devices
- B01D2259/40083—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption
- B01D2259/40088—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by heating
- B01D2259/40098—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by heating with other heating means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/40—Further details for adsorption processes and devices
- B01D2259/402—Further details for adsorption processes and devices using two beds
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
Low concentration sulfur hexafluoride gas retracting device, including mixed gas air inlet, the first compressor, the second compressor, storage tank, the first two position three-way valve, the second two position three-way valve, the 3rd two position three-way valve, the 4th two position three-way valve, the first electric butterfly valve, the second electric butterfly valve, nitrogen inlet, nitrogen purge mouth, sulfur hexafluoride recovery port, the first molecular sieve, the second molecular sieve and sulfur hexafluoride detector；It is provided with first the second molecular sieve of the molecular sieve amount of money on heating rod, the first molecular sieve and the second molecular sieve and is respectively connected with pressure gauge.The invention also discloses the recovery method of low concentration sulfur hexafluoride gas retracting device.The present invention can adsorb the principle of SF6 gases using molecular sieve, and adsorbance can reach the 50% of molecular sieve, and the characteristic that can be regenerated by heating under reduced pressure, so that tail gas qualified discharge, reduces the pollution to air, meet environmental requirement；The present invention compares membrane separation device, the advantage of economical and realizability.
Description
Technical field
The invention belongs to sulfur hexafluoride gas recovery technology field, and in particular to a kind of low concentration sulfur hexafluoride gas is reclaimed
Device and its recovery method.
Background technology
With continuing to develop for society, country increasingly attaching importance to environmental protection and reduction of greenhouse gas discharge, in this big historical background
Under, SF6The greenhouse effects of gas are gradually paid attention to by environment specialist.Substantial amounts of mixed gas research is expanded both at home and abroad, is expected
With SF6/N2Mixed gas replaces pure SF6Gas, is used as the insulating gas of switchgear.
With SF6/N2Mixed gas gradually substitutes SF6Pure gas is used as switchgear insulating gas, SF6/N2Mixed gas
GIS buses have been put into China to be used.This SF6/N2The GIS buses of mixed gas are when disintegration is overhauled, mix insulation
SF in gas6Concentration be about 30%, the mix insulation gas in bus can not direct emptying process, be to SF therein6Gas
Purified, the 800ppm of meet the requirement of environmental protection could be emptied.But traditional rectification and purification method is not applied to, and can only use UF membrane
Device is purified.
The SF of 30% concentration6/N2Mixed gas, can be the SF in mixed gas after being separated by membrane separation device6Gas
And N2Separated, the SF after separation6Purity reaches more than 90%, but the N of discharge2Contain SF in gas6Content is 0.61%, this
Gas index after individual separation is the index of membrane separation device design, has no idea to be improved.The SF of this discharge6Contain
Amount exceedes the discharge index that environment allows, it is necessary to carry out recovery purification again.If this tail gas is entered with membrane separation device again
Row separation, reaches the effect of two grades of three-level UF membranes, cost is too high uneconomical.
The content of the invention
In order to overcome the SF of existing 30% concentration6/N2N of the mixed gas after being separated by membrane separation device2In contain
Low concentration SF6（Content is about 0.61%）The discharge index of environment permission is not met（800ppm）Deficiency, the present invention provides a kind of
Low concentration sulfur hexafluoride gas retracting device and its recovery method, can will contain low concentration SF6Reclaimed again, make tail gas
Qualified discharge.
In order to solve the above technical problems, the present invention is adopted the following technical scheme that：Low concentration sulfur hexafluoride gas retracting device,
Including mixed gas air inlet, the first compressor, the second compressor, storage tank, the first two position three-way valve, the second two-position three way
Valve, the 3rd two position three-way valve, the 4th two position three-way valve, the first electric butterfly valve, the second electric butterfly valve, nitrogen inlet, nitrogen row
Eat dishes without rice or wine, sulfur hexafluoride recovery port, the first molecular sieve, the second molecular sieve and sulfur hexafluoride detector；
Mixed gas air inlet is connected with the air inlet of the first compressor, the gas outlet of the first compressor and the first two position three-way valve
First port connection, the second port of the first two position three-way valve is connected with the combi inlet port of the second molecular sieve, the one or two
3rd port of triple valve is connected with the combi inlet port of the second molecular sieve, and the first of nitrogen inlet and the second two position three-way valve
Port is connected, and the second port of the second two position three-way valve is connected with the nitrogen inlet of the second molecular sieve, the second two position three-way valve
3rd port is connected with the nitrogen inlet of the first molecular sieve, and the gas outlet of the first molecular sieve and the air inlet of the first electric butterfly valve connect
Connect, the gas outlet of the first electric butterfly valve is connected with the first port of the 3rd two position three-way valve, the gas outlet of the second molecular sieve and the
The air inlet connection of two electric butterfly valves, the gas outlet of the second electric butterfly valve is connected with the first port of the 4th two position three-way valve, the
Arranged by sulfur hexafluoride detector and nitrogen 3rd port of the second port of three two position three-way valves and the 4th two position three-way valve
Eat dishes without rice or wine connection, the 3rd port of the 3rd two position three-way valve and the second port of the 4th two position three-way valve are entered with the second compressor
Gas port is connected, and the gas outlet of the second compressor is connected by the air inlet of sulfur hexafluoride recovery port and storage tank.
It is provided with first molecular sieve on the first heating rod, the first molecular sieve and is connected with first pressure table.
It is provided with second molecular sieve on the second heating rod, the second molecular sieve and is connected with second pressure table.
The recovery method of low concentration sulfur hexafluoride gas retracting device, comprises the following steps,
（1）Absorption of first molecular sieve to the sulfur hexafluoride in mixed gas：In the presence of the first compressor, sulfur hexafluoride gas
The mixed gas of body and nitrogen is entered in the first compressor by mixed gas air inlet, and the first compressor increases mixed gas
Pressure, then cuts through first port by the first two position three-way valve and the 3rd port enters and sulfur hexafluoride is carried out in the first molecular sieve
The absorption of gas, the nitrogen discharge that the first electric butterfly valve adjust automatically contains micro sulfur hexafluoride gas is to adjust the first molecule
Pressure inside sieve, makes the pressure inside the first molecular sieve maintain 0.6~0.7Mpa, the 3rd two-position three-way valve cuts through first end
Mouthful and second port, the nitrogen containing micro sulfur hexafluoride gas in the first molecular sieve passes sequentially through the first electric butterfly valve, the
Emptied after three two position three-way valves and sulfur hexafluoride detector by nitrogen purge mouthful, the hexafluoro set at nitrogen purge mouth
Change the content that sulfur determination apparatus monitors the sulfur hexafluoride gas in nitrogen after the first molecular sieve adsorption in real time；When sulfur hexafluoride detector
The content for detecting sulfur hexafluoride during this emission request, has shown the first molecular sieve adsorption sulfur hexafluoride gas more than 0.01%
Through saturation, it is necessary to be regenerated to the first molecular sieve；
（2）Switch operating mode, allows absorption of second molecular sieve to the sulfur hexafluoride in mixed gas, while to the first molecular sieve
Carry out thermal regeneration；
Second molecular sieve is to the process of the absorption of the sulfur hexafluoride in mixed gas：First two position three-way valve is cut through into first end
Mouth and second port, in the presence of the first compressor, the mixed gas of sulfur hexafluoride gas and nitrogen is by mixed gas air inlet
Mouthful enter in the first compressor, the first compressor is pressurized mixed gas, then enter the by the first two position three-way valve
Carry out the absorption of sulfur hexafluoride gas in two molecular sieves, the second electric butterfly valve adjust automatically nitrogen discharge is to adjust the second molecule
Pressure inside sieve, makes the pressure inside the second molecular sieve maintain 0.6~0.7Mpa, the 4th two-position three-way valve cuts through first end
Nitrogen in mouth and the 3rd port, the second molecular sieve passes sequentially through the second electric butterfly valve, the 4th two position three-way valve and sulfur hexafluoride
Mouthful emptied by nitrogen purge after detector, the sulfur hexafluoride detector of setting is real-time nitrogen purge mouth at monitors through the
After two molecular sieve adsorptions in nitrogen sulfur hexafluoride gas content；When the content that sulfur hexafluoride detector detects sulfur hexafluoride surpasses
When crossing 0.01% this emission request, show the second molecular sieve adsorption sulfur hexafluoride gas saturation, it is necessary to the second molecular sieve
Regenerated；
It is to the process that the first molecular sieve carries out thermal regeneration：First two position three-way valve is cut through after first port and second port,
The first heating rod in the first molecular sieve is opened, the temperature in the first molecular sieve is heated to 180 DEG C；Sulfur hexafluoride gas is released
Release, the 3rd two-position three-way valve cuts through first port and the 3rd port, then the first electric butterfly valve standard-sized sheet starts second and compress
Machine out of first molecular sieve extracts the sulfur hexafluoride gas that the first molecular sieve discharges and be compressed in storage tank out, works as first pressure
When the registration of table is less than 0.1Mpa, i.e. the first molecular sieve internal pressure less than 0.1Mpa, the second two-position three-way valve is cut through first
Port and the 3rd port, nitrogen are injected into the first molecular sieve the first regenerating molecular sieve knot after 2~3 minutes by nitrogen inlet
Beam, closes the source of the gas of nitrogen inlet, closes the first heating rod and stops the heating of the first molecular sieve, keeps the second compressor to continue work
After making 2~5 minutes, the second compressor and the first electric butterfly valve are turned off；
（3）Switch operating mode, allows absorption of first molecular sieve to the sulfur hexafluoride in mixed gas, while to the second molecular sieve
Carry out thermal regeneration；
Adsorption process and step of first molecular sieve to the sulfur hexafluoride in mixed gas（1）Process it is identical；
It is to the process that the second molecular sieve carries out thermal regeneration：First two position three-way valve is cut through behind first port and the 3rd port,
The second heating rod in the second molecular sieve is opened, the temperature in the second molecular sieve is heated to 180 DEG C；Sulfur hexafluoride gas is released
Release, the 4th two-position three-way valve cuts through first port and second port, then the second electric butterfly valve standard-sized sheet starts second and compress
Machine out of second molecular sieve extracts the sulfur hexafluoride gas that the second molecular sieve discharges and be compressed in storage tank out, works as second pressure
When the registration of table is less than 0.1Mpa, i.e. the first molecular sieve internal pressure less than 0.1Mpa, the second two-position three-way valve is cut through first
Port and second port, nitrogen are injected into the second molecular sieve the second regenerating molecular sieve knot after 2~3 minutes by nitrogen inlet
Beam, closes the source of the gas of nitrogen inlet, closes the second heating rod and stops the heating of the second molecular sieve, keeps the second compressor to continue work
After making 2~5 minutes, the second compressor and the second electric butterfly valve are turned off.
（4）, circulate operation step（2）And step（3）, the first molecular sieve and the second molecular sieve alternate cycles absorption and again
It is raw, the recovery operation of low concentration sulfur hexafluoride gas is continuously carried out, and ensure that sulfur hexafluoride content expires in emission
Toe ring guaranteed request.
Using above-mentioned technical proposal, the present invention has mainly used molecular sieve to adsorb SF6The principle of gas, and absorption
Amount can reach the 50% of molecular sieve, and the characteristic that can be regenerated by heating under reduced pressure, so that tail gas qualified discharge,
The pollution to air is reduced, environmental requirement is met；The present invention compares membrane separation device, economical and realizability it is excellent
Gesture.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention.
Embodiment
As shown in figure 1, the low concentration sulfur hexafluoride gas retracting device of the present invention, including mixed gas air inlet 1, first
Compressor 2, the second compressor 3, storage tank 4, the first two position three-way valve 5, the second two position three-way valve 6, the 3rd two position three-way valve 7,
It is 4th two position three-way valve 8, the first electric butterfly valve 9, the second electric butterfly valve 10, nitrogen inlet 11, nitrogen purge mouthfuls 12, lithium
The 13, first molecular sieve 14 of sulfur recovery mouthful, the second molecular sieve 15 and sulfur hexafluoride detector 16；
Mixed gas air inlet 1 is connected with the air inlet of the first compressor 2, the gas outlet of the first compressor 2 with the one or two three
The first port connection of port valve 5, the second port of the first two position three-way valve 5 is connected with the combi inlet port of the second molecular sieve 15,
3rd port of the first two position three-way valve 5 is connected with the combi inlet port of the second molecular sieve 15, nitrogen inlet 11 and the 2nd 2
The first port connection of position three-way valve 6, the second port of the second two position three-way valve 6 and the nitrogen inlet of the second molecular sieve 15 connect
Connect, the 3rd port of the second two position three-way valve 6 is connected with the nitrogen inlet of the first molecular sieve 14, the gas outlet of the first molecular sieve 14
It is connected with the air inlet of the first electric butterfly valve 9, the gas outlet of the first electric butterfly valve 9 and the first port of the 3rd two position three-way valve 7
Connection, the gas outlet of the second molecular sieve 15 is connected with the air inlet of the second electric butterfly valve 10, the gas outlet of the second electric butterfly valve 10
It is connected with the first port of the 4th two position three-way valve 8, the second port of the 3rd two position three-way valve 7 and the 4th two position three-way valve 8
3rd port be connected by sulfur hexafluoride detector 16 and nitrogen purge mouthfuls 12, the 3rd port of the 3rd two position three-way valve 7 with
Air inlet of the second port of 4th two position three-way valve 8 with the second compressor 3 is connected, and the gas outlet of the second compressor 3 passes through
Sulfur hexafluoride recovery port 13 is connected with the air inlet of storage tank 4.
It is provided with first molecular sieve 14 on first heating rod 17, the first molecular sieve 14 and is connected with first pressure table 18.
It is provided with second molecular sieve 15 on second heating rod 19, the second molecular sieve 15 and is connected with second pressure table 20.
" 1,2,3 " in Fig. 1 around four two-way triple valves correspond to " first port, second port and the 3rd end respectively
Mouthful ".
The recovery method of low concentration sulfur hexafluoride gas retracting device, comprises the following steps,
（1）Absorption of first molecular sieve 14 to the sulfur hexafluoride in mixed gas：It is lithium in the presence of the first compressor 2
The mixed gas of sulphur gas and nitrogen is entered in the first compressor 2 by mixed gas air inlet 1, and the first compressor 2 is mixing
Gas boosting, then cuts through first port by the first two position three-way valve 5 and the 3rd port enters and entered in the first molecular sieve 14
The absorption of row sulfur hexafluoride gas, the adjust automatically of the first electric butterfly valve 9 contain the nitrogen discharge of micro sulfur hexafluoride gas with
The pressure inside the first molecular sieve 14 is adjusted, the pressure inside the first molecular sieve 14 is maintained 0.6~0.7Mpa, the 3rd two
The nitrogen containing micro sulfur hexafluoride gas that triple valve is cut through in first port and second port, the first molecular sieve 14 leads to successively
Cross after the first electric butterfly valve 9, the 3rd two position three-way valve 7 and sulfur hexafluoride detector 16 and to be emptied by nitrogen purge mouthfuls 12,
Hexafluoro in nitrogen after the real-time monitoring of sulfur hexafluoride detector 16 set at nitrogen purge mouthful 12 is adsorbed through the first molecular sieve 14
Change the content of sulphur gas；When sulfur hexafluoride detector 16 detects content this emission request more than 0.01% of sulfur hexafluoride,
Show the first molecular sieve 14 absorption sulfur hexafluoride gas saturation, it is necessary to be regenerated to the first molecular sieve 14；
（2）Switch operating mode, allows absorption of second molecular sieve 15 to the sulfur hexafluoride in mixed gas, while to the first molecule
Sieve 14 carries out thermal regeneration；
Second molecular sieve 15 is to the process of the absorption of the sulfur hexafluoride in mixed gas：First two position three-way valve 5 is cut through
Single port and second port, in the presence of the first compressor 2, the mixed gas of sulfur hexafluoride gas and nitrogen is by mixed gas
Air inlet 1 is entered in the first compressor 2, and the first compressor 2 is pressurized mixed gas, then passes through the first two position three-way valve 5
Enter in the second molecular sieve 15 and carry out the absorption of sulfur hexafluoride gas, the adjust automatically nitrogen discharge of the second electric butterfly valve 10 with
The pressure inside the second molecular sieve 15 is adjusted, the pressure inside the second molecular sieve 15 is maintained 0.6~0.7Mpa, the 4th two
The nitrogen that triple valve is cut through in first port and the 3rd port, the second molecular sieve 15 passes sequentially through the second electric butterfly valve the 10, the 4th
Emptied, set at nitrogen purge mouthful 12 by nitrogen purge mouthful 12 after two position three-way valve 8 and sulfur hexafluoride detector 16
The sulfur hexafluoride gas in nitrogen after monitoring is adsorbed through the second molecular sieve 15 in real time of sulfur hexafluoride detector 16 content；Work as hexafluoro
The content that change sulfur determination apparatus 16 detects sulfur hexafluoride during this emission request, shows that the second molecular sieve 15 is adsorbed more than 0.01%
Sulfur hexafluoride gas saturation, it is necessary to be regenerated to the second molecular sieve 15；
It is to the process that the first molecular sieve 14 carries out thermal regeneration：First two position three-way valve 5 cuts through first port and second port
Afterwards, the first heating rod 17 in the first molecular sieve 14 is opened, the temperature in the first molecular sieve 14 is heated to 180 DEG C；It is lithium
Sulphur gas is released, and the 3rd two-position three-way valve cuts through first port and the 3rd port, the standard-sized sheet of the first electric butterfly valve 9, then
Start the sulfur hexafluoride gas that the second compressor 3 discharges the first molecular sieve 14 and extract out and be compressed to out of first molecular sieve 14 and deposit
In storage tank 4, when the registration of first pressure table 18, which is less than 0.1Mpa, the i.e. internal pressure of the first molecular sieve 14, is less than 0.1Mpa,
Second two-position three-way valve cuts through first port and the 3rd port, and nitrogen is injected into 2 in the first molecular sieve 14 by nitrogen inlet 11
The regeneration ending of first molecular sieve 14 after~3 minutes, closes the source of the gas of nitrogen inlet 11, closes the first heating rod 17 and stops first
Molecular sieve 14 is heated, and after the second compressor 3 of holding works on 2~5 minutes, turns off the second compressor 3 and the first electronic butterfly
Valve 9；
（3）Switch operating mode, allows absorption of first molecular sieve 14 to the sulfur hexafluoride in mixed gas, while to the second molecule
Sieve 15 carries out thermal regeneration；
Adsorption process and step of first molecular sieve 14 to the sulfur hexafluoride in mixed gas（1）Process it is identical；
It is to the process that the second molecular sieve 15 carries out thermal regeneration：First two position three-way valve 5 cuts through first port and the 3rd port
Afterwards, the second heating rod 19 in the second molecular sieve 15 is opened, the temperature in the second molecular sieve 15 is heated to 180 DEG C；It is lithium
Sulphur gas is released, and the 4th two-position three-way valve cuts through first port and second port, the standard-sized sheet of the second electric butterfly valve 10, then
Start the sulfur hexafluoride gas that the second compressor 3 discharges the second molecular sieve 15 and extract out and be compressed to out of second molecular sieve 15 and deposit
In storage tank 4, when the registration of second pressure table 20, which is less than 0.1Mpa, the i.e. internal pressure of the first molecular sieve 14, is less than 0.1Mpa,
Second two-position three-way valve cuts through first port and second port, and nitrogen is injected into 2 in the second molecular sieve 15 by nitrogen inlet 11
The regeneration ending of second molecular sieve 15 after~3 minutes, closes the source of the gas of nitrogen inlet 11, closes the second heating rod 19 and stops second
Molecular sieve 15 is heated, and after the second compressor 3 of holding works on 2~5 minutes, turns off the second compressor 3 and the second electronic butterfly
Valve 10.
（4）, circulate operation step（2）And step（3）, the first molecular sieve 14 and the alternate cycles of the second molecular sieve 15 absorption and
Regeneration, continuously carries out the recovery operation of low concentration sulfur hexafluoride gas, and ensures sulfur hexafluoride content in emission
Meet environmental requirement.
The present embodiment not makees any formal limitation to shape, material, structure of the present invention etc., every according to this hair
Any simple modification, equivalent variations and modification that bright technical spirit is made to above example, belong to the technology of the present invention side
The protection domain of case.
Claims (4)
1. low concentration sulfur hexafluoride gas retracting device, it is characterised in that：Including mixed gas air inlet, the first compressor,
Two compressors, storage tank, the first two position three-way valve, the second two position three-way valve, the 3rd two position three-way valve, the 4th two position three-way valve,
First electric butterfly valve, the second electric butterfly valve, nitrogen inlet, nitrogen purge mouth, sulfur hexafluoride recovery port, the first molecular sieve,
Two molecular sieves and sulfur hexafluoride detector；
Mixed gas air inlet is connected with the air inlet of the first compressor, the gas outlet of the first compressor and the first two position three-way valve
First port connection, the second port of the first two position three-way valve is connected with the combi inlet port of the second molecular sieve, the one or two
3rd port of triple valve is connected with the combi inlet port of the second molecular sieve, and the first of nitrogen inlet and the second two position three-way valve
Port is connected, and the second port of the second two position three-way valve is connected with the nitrogen inlet of the second molecular sieve, the second two position three-way valve
3rd port is connected with the nitrogen inlet of the first molecular sieve, and the gas outlet of the first molecular sieve and the air inlet of the first electric butterfly valve connect
Connect, the gas outlet of the first electric butterfly valve is connected with the first port of the 3rd two position three-way valve, the gas outlet of the second molecular sieve and the
The air inlet connection of two electric butterfly valves, the gas outlet of the second electric butterfly valve is connected with the first port of the 4th two position three-way valve, the
Arranged by sulfur hexafluoride detector and nitrogen 3rd port of the second port of three two position three-way valves and the 4th two position three-way valve
Eat dishes without rice or wine connection, the 3rd port of the 3rd two position three-way valve and the second port of the 4th two position three-way valve are entered with the second compressor
Gas port is connected, and the gas outlet of the second compressor is connected by the air inlet of sulfur hexafluoride recovery port and storage tank.
2. low concentration sulfur hexafluoride gas retracting device according to claim 1, it is characterised in that：Set in first molecular sieve
It is equipped with the first heating rod, the first molecular sieve and is connected with first pressure table.
3. low concentration sulfur hexafluoride gas retracting device according to claim 2, it is characterised in that：Set in second molecular sieve
It is equipped with the second heating rod, the second molecular sieve and is connected with second pressure table.
4. using the recovery method of low concentration sulfur hexafluoride gas retracting device as claimed in claim 3, it is characterised in that：Bag
Include following steps,
（1）Absorption of first molecular sieve to the sulfur hexafluoride in mixed gas：In the presence of the first compressor, sulfur hexafluoride gas
The mixed gas of body and nitrogen is entered in the first compressor by mixed gas air inlet, and the first compressor increases mixed gas
Pressure, then cuts through first port by the first two position three-way valve and the 3rd port enters and sulfur hexafluoride is carried out in the first molecular sieve
The absorption of gas, the nitrogen discharge that the first electric butterfly valve adjust automatically contains micro sulfur hexafluoride gas is to adjust the first molecule
Pressure inside sieve, makes the pressure inside the first molecular sieve maintain 0.6~0.7Mpa, the 3rd two-position three-way valve cuts through first end
Mouthful and second port, the nitrogen containing micro sulfur hexafluoride gas in the first molecular sieve passes sequentially through the first electric butterfly valve, the
Emptied after three two position three-way valves and sulfur hexafluoride detector by nitrogen purge mouthful, the hexafluoro set at nitrogen purge mouth
Change the content that sulfur determination apparatus monitors the sulfur hexafluoride gas in nitrogen after the first molecular sieve adsorption in real time；When sulfur hexafluoride detector
The content for detecting sulfur hexafluoride during this emission request, has shown the first molecular sieve adsorption sulfur hexafluoride gas more than 0.01%
Through saturation, it is necessary to be regenerated to the first molecular sieve；
（2）Switch operating mode, allows absorption of second molecular sieve to the sulfur hexafluoride in mixed gas, while to the first molecular sieve
Carry out thermal regeneration；
Second molecular sieve is to the process of the absorption of the sulfur hexafluoride in mixed gas：First two position three-way valve is cut through into first end
Mouth and second port, in the presence of the first compressor, the mixed gas of sulfur hexafluoride gas and nitrogen is by mixed gas air inlet
Mouthful enter in the first compressor, the first compressor is pressurized mixed gas, then enter the by the first two position three-way valve
Carry out the absorption of sulfur hexafluoride gas in two molecular sieves, the second electric butterfly valve adjust automatically nitrogen discharge is to adjust the second molecule
Pressure inside sieve, makes the pressure inside the second molecular sieve maintain 0.6~0.7Mpa, the 4th two-position three-way valve cuts through first end
Nitrogen in mouth and the 3rd port, the second molecular sieve passes sequentially through the second electric butterfly valve, the 4th two position three-way valve and sulfur hexafluoride
Mouthful emptied by nitrogen purge after detector, the sulfur hexafluoride detector of setting is real-time nitrogen purge mouth at monitors through the
After two molecular sieve adsorptions in nitrogen sulfur hexafluoride gas content；When the content that sulfur hexafluoride detector detects sulfur hexafluoride surpasses
When crossing 0.01% this emission request, show the second molecular sieve adsorption sulfur hexafluoride gas saturation, it is necessary to the second molecular sieve
Regenerated；
It is to the process that the first molecular sieve carries out thermal regeneration：First two position three-way valve is cut through after first port and second port,
The first heating rod in the first molecular sieve is opened, the temperature in the first molecular sieve is heated to 180 DEG C；Sulfur hexafluoride gas is released
Release, the 3rd two-position three-way valve cuts through first port and the 3rd port, then the first electric butterfly valve standard-sized sheet starts second and compress
Machine out of first molecular sieve extracts the sulfur hexafluoride gas that the first molecular sieve discharges and be compressed in storage tank out, works as first pressure
When the registration of table is less than 0.1Mpa, i.e. the first molecular sieve internal pressure less than 0.1Mpa, the second two-position three-way valve is cut through first
Port and the 3rd port, nitrogen are injected into the first molecular sieve the first regenerating molecular sieve knot after 2~3 minutes by nitrogen inlet
Beam, closes the source of the gas of nitrogen inlet, closes the first heating rod and stops the heating of the first molecular sieve, keeps the second compressor to continue work
After making 2~5 minutes, the second compressor and the first electric butterfly valve are turned off；
（3）Switch operating mode, allows absorption of first molecular sieve to the sulfur hexafluoride in mixed gas, while to the second molecular sieve
Carry out thermal regeneration；
Adsorption process and step of first molecular sieve to the sulfur hexafluoride in mixed gas（1）Process it is identical；
It is to the process that the second molecular sieve carries out thermal regeneration：First two position three-way valve is cut through behind first port and the 3rd port,
The second heating rod in the second molecular sieve is opened, the temperature in the second molecular sieve is heated to 180 DEG C；Sulfur hexafluoride gas is released
Release, the 4th two-position three-way valve cuts through first port and second port, then the second electric butterfly valve standard-sized sheet starts second and compress
Machine out of second molecular sieve extracts the sulfur hexafluoride gas that the second molecular sieve discharges and be compressed in storage tank out, works as second pressure
When the registration of table is less than 0.1Mpa, i.e. the first molecular sieve internal pressure less than 0.1Mpa, the second two-position three-way valve is cut through first
Port and second port, nitrogen are injected into the second molecular sieve the second regenerating molecular sieve knot after 2~3 minutes by nitrogen inlet
Beam, closes the source of the gas of nitrogen inlet, closes the second heating rod and stops the heating of the second molecular sieve, keeps the second compressor to continue work
After making 2~5 minutes, the second compressor and the second electric butterfly valve are turned off.
（4）, circulate operation step（2）And step（3）, the first molecular sieve and the second molecular sieve alternate cycles are adsorbed and regenerated, connect
It is continuous constantly to carry out the recovery operation of low concentration sulfur hexafluoride gas, and ensure that sulfur hexafluoride content meets environmental protection in emission
It is required that.
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| CN201710515224.XA CN107281896A (en) | 2017-06-29 | 2017-06-29 | Low concentration sulfur hexafluoride gas retracting device and its recovery method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108355467A (en) * | 2018-04-20 | 2018-08-03 | 国网湖北省电力有限公司电力科学研究院 | GIS gas chamber gas humidity online processing device and methods |
| 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 |
| CN109603418A (en) * | 2018-12-30 | 2019-04-12 | 国网北京市电力公司 | Gas purge system and method for gas purification |
| CN113958869A (en) * | 2021-10-19 | 2022-01-21 | 国网安徽省电力有限公司电力科学研究院 | Zero-emission insulating gas purification treatment device and method |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108355467A (en) * | 2018-04-20 | 2018-08-03 | 国网湖北省电力有限公司电力科学研究院 | GIS gas chamber gas humidity online processing device and methods |
| CN108355467B (en) * | 2018-04-20 | 2023-03-10 | 国网湖北省电力有限公司电力科学研究院 | Gas humidity online processing device and method for GIS gas chamber |
| 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 |
| CN109276976B (en) * | 2018-12-05 | 2023-07-04 | 国家电网有限公司 | Recovery device and method for sulfur hexafluoride and nitrogen mixed gas |
| CN109603418A (en) * | 2018-12-30 | 2019-04-12 | 国网北京市电力公司 | Gas purge system and method for gas purification |
| CN113958869A (en) * | 2021-10-19 | 2022-01-21 | 国网安徽省电力有限公司电力科学研究院 | Zero-emission insulating gas purification treatment device and method |
| CN113958869B (en) * | 2021-10-19 | 2023-11-21 | 国网安徽省电力有限公司电力科学研究院 | Zero-emission insulating gas purifying treatment device and method |
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