CN107433111A - A kind of quick recovery system of mix insulation gas and method - Google Patents
A kind of quick recovery system of mix insulation gas and method Download PDFInfo
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- CN107433111A CN107433111A CN201710840193.5A CN201710840193A CN107433111A CN 107433111 A CN107433111 A CN 107433111A CN 201710840193 A CN201710840193 A CN 201710840193A CN 107433111 A CN107433111 A CN 107433111A
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- 238000009413 insulation Methods 0.000 title claims abstract description 73
- 238000011084 recovery Methods 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims abstract description 20
- 239000012528 membrane Substances 0.000 claims abstract description 169
- 238000003860 storage Methods 0.000 claims abstract description 48
- 238000000926 separation method Methods 0.000 claims abstract description 33
- 230000008595 infiltration Effects 0.000 claims description 35
- 238000001764 infiltration Methods 0.000 claims description 35
- 238000005057 refrigeration Methods 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 7
- 239000000835 fiber Substances 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 5
- 230000035699 permeability Effects 0.000 claims description 5
- 239000012535 impurity Substances 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 239000000428 dust Substances 0.000 claims description 2
- 239000002245 particle Substances 0.000 claims description 2
- 238000004064 recycling Methods 0.000 claims description 2
- 238000009738 saturating Methods 0.000 claims 1
- 239000007788 liquid Substances 0.000 abstract description 9
- 239000000463 material Substances 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 6
- 238000000746 purification Methods 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 150
- 239000000203 mixture Substances 0.000 description 42
- 229910018503 SF6 Inorganic materials 0.000 description 38
- WRQGPGZATPOHHX-UHFFFAOYSA-N ethyl 2-oxohexanoate Chemical compound CCCCC(=O)C(=O)OCC WRQGPGZATPOHHX-UHFFFAOYSA-N 0.000 description 8
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000009792 diffusion process Methods 0.000 description 3
- 239000008246 gaseous mixture Substances 0.000 description 2
- 239000005431 greenhouse gas Substances 0.000 description 2
- 239000012510 hollow fiber Substances 0.000 description 2
- 238000007781 pre-processing Methods 0.000 description 2
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 description 2
- 229960000909 sulfur hexafluoride Drugs 0.000 description 2
- QGHDLJAZIIFENW-UHFFFAOYSA-N 4-[1,1,1,3,3,3-hexafluoro-2-(4-hydroxy-3-prop-2-enylphenyl)propan-2-yl]-2-prop-2-enylphenol Chemical group C1=C(CC=C)C(O)=CC=C1C(C(F)(F)F)(C(F)(F)F)C1=CC=C(O)C(CC=C)=C1 QGHDLJAZIIFENW-UHFFFAOYSA-N 0.000 description 1
- 239000004425 Makrolon Substances 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000008033 biological extinction Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000009924 canning Methods 0.000 description 1
- OEERIBPGRSLGEK-UHFFFAOYSA-N carbon dioxide;methanol Chemical compound OC.O=C=O OEERIBPGRSLGEK-UHFFFAOYSA-N 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Classifications
-
- 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
- B01D53/22—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 diffusion
- B01D53/225—Multiple stage diffusion
- B01D53/226—Multiple stage diffusion in serial connexion
-
- 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
- B01D53/22—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 diffusion
- B01D53/229—Integrated processes (Diffusion and at least one other process, e.g. adsorption, absorption)
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
- F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/151—Reduction of greenhouse gas [GHG] emissions, e.g. CO2
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Inorganic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention discloses a kind of quick recovery system of mix insulation gas and method, including pretreatment module, mixed gas UF membrane module, SF6Liquefied storage module and vent gas treatment module, the mix insulation gas handled by pretreatment module enters mixed gas UF membrane module, by the selective penetrated property of seperation film to SF6And N2Just separate.The just higher SF of concentration after separation6Gas storage in liquid in holding vessel after the further purification processes of secondary membrane；The just N after separation2Reach safety dumping requirement by harmless treatment into vent gas treatment module, emptied.Using the quick recovery system of mix insulation gas provided by the invention and method, to SF6The separating effect of gas is preferable, the SF isolated6N in gas2Content is extremely low, can continue mass storage liquid SF6, reduce storage gas recovery SF6The demand of container, the difficulty and workload of recovery operation are reduced, be greatly reduced equipment, material and the cost of transport.
Description
Technical field
The present invention relates to tail gas recycle technical field, more particularly to a kind of quick recovery system of mix insulation gas and side
Method.
Background technology
Sulfur hexafluoride (SF6) gas because of its excellent insulation arc extinction performance, is widely used in power industry.But hexafluoro
It is notable to change the greenhouse effects of sulphur, is《The Kyoto Protocol》In be prohibited one of 6 kinds of greenhouse gases of discharge, thus using process
Middle needs are strictly controlled.To adapt to new International Environmental Protection requirement, greenhouse gas emission is reduced, is started both at home and abroad using mixing
Insulating gas (SF6+N2、SF6+CO2、SF6+ air etc.) pure six-component force balance gas is substituted, reduce sulfur hexafluoride gas dosage.
First SF in the world is built up in Geneva6、N2Mixed gas insulation metal closed power transmission line (GIL) simultaneously puts into operation for many years, subtracts significantly
SF is lacked6The usage amount of gas, reduces effect on environment.In recent years, power grid enterprises of China also begin to attempt Medium voltage switch or circuit breaker,
Mix insulation gas is used on GIS buses, application constantly expands.
At present, as mixing SF6When gas apparatus is overhauled, disintegrates or be retired, it is necessary to the SF in equipment6Gaseous mixture
Body is recycled.Pure SF6Gas easily liquefies, SF6General canning and storage in liquid form when gas reclaims.And when mixed
Close in gas because containing and SF6Considerable amount of N2Or air etc., N2Deng being difficult to liquefy under normal conditions, using existing time
When receiving apparatus carries out mixed gas recovery, pressure of storage tank constantly raises, and more than compressor operating pressure, causes recovery not continue
Carry out.Scene needs to prepare a large amount of gas container storage gas recoveries, adds the difficulty and workload of recovery operation, also significantly
Add equipment, material and the cost of transport.
To sum up, prior art is in recovery SF6In mixed gas, it is big difficulty and the workload of recovery operation to be present, equipment, material
The problem of material and cost of transportation are high.
The content of the invention
It is an object of the invention to provide a kind of quick recovery system of mix insulation gas and method, to solve above-mentioned existing skill
The problem of art is present, it is not necessary to substantial amounts of containers store gas recovery, reduce the difficulty and workload of recovery operation, also drop significantly
Low equipment, material and the cost of transport.
To achieve the above object, the invention provides following scheme：
The present invention provides a kind of quick recovery system of mix insulation gas, including pretreatment module, mixed gas UF membrane
Module, SF6Liquefied storage module and vent gas treatment module；
The pretreatment module includes preprocessor, the first compressor set, filter and heater, wherein the pretreatment
The inlet end of device is connected by pipeline with mix insulation gas inlet, the outlet side of the preprocessor and the described first compression
Unit, the filter and the heater are sequentially connected by pipeline；
The mixed gas UF membrane module includes the first membrane separator and the second membrane separator, wherein first film point
Air inlet from device is connected with the gas outlet of the heater by pipeline, and the gas outlet of first membrane separator passes through pipeline
It is connected with the air inlet of second membrane separator, the gas outlet of second membrane separator passes through pipeline and the SF6Liquefaction
Storage module connects, and the infiltration mouth of second membrane separator passes through pipeline and the pipeline of the first compressor set inlet port
Connection；
The vent gas treatment module includes tertiary membrane separator and the 4th membrane separator, the air inlet of the tertiary membrane separator
Mouthful be connected by pipeline with the infiltration mouth of first membrane separator, first membrane separator and the tertiary membrane separator it
Between pipeline on be disposed with check valve, buffer tank and the second compressor, the gas outlet of the tertiary membrane separator passes through pipe
Road is connected with the air inlet of the 4th membrane separator, and the gas outlet of the 4th membrane separator passes through pipeline and the SF6Liquid
Change storage module connection, the infiltration mouth of the tertiary membrane separator is connected by pipeline with exhaust outlet, the 4th membrane separator
Infiltration mouth be connected by pipeline with the buffer tank；
On the pipeline at the infiltration mouth end of second membrane separator, between the tertiary membrane separator and the exhaust outlet
Check valve is provided with pipeline on pipeline, between the 4th membrane separator and the buffer tank.
Preferably, the SF6Liquefied storage module include be sequentially connected by pipeline the 3rd compressor, refrigeration unit and
The gas outlet of holding vessel, second membrane separator and the 4th membrane separator by pipeline respectively with the 3rd compressor
Connection.
Preferably, there is a check valve on the pipeline between second membrane separator and the 3rd compressor, described
A check valve is provided with pipeline between four membrane separators and the 3rd compressor.
Preferably, first membrane separator, second membrane separator, the tertiary membrane separator and the 4th film
Separator interior is provided with hollow-fibre membrane.
Preferably, first compressor set by least one compressor set into.
Preferably, in addition to vavuum pump, the vavuum pump are entered with the preprocessor respectively by two vacuum pump pipelines
The pipeline at gas port end and the 4th membrane separator and SF6Pipeline connection between liquefied storage module, two vacuum
Magnetic valve is provided with pump conduit.
Present invention also offers a kind of method that mix insulation gas quickly reclaims, including following recycling step：
Step 1: mix insulation gas pre-processes：Mix insulation gas is entered by mix insulation gas inlet, is passed through successively
Preprocessor, the first compressor set, filter and heater are crossed, the impurity in the preprocessor filtering adsorbed gas is described
First compressor set provides the pressure needed for the separation of mix insulation gas；The filter filtering ensures powder in mix insulation gas
Dirt grain diameter is less than 0.01 μm；The heater heats to mix insulation gas, ensures separation temperature requirement；
Step 2: mix insulation gas separating treatment：Mix insulation gas by pretreatment, initially enter the first film point
From device permeability and separation, the mix insulation gas after the first membrane separator separation, in first membrane separator infiltration mouth row
The gas gone out can not reach direct discharge standard, cache and handle into vent gas treatment module；First membrane separator goes out
The gas of gas port end output, is delivered into second membrane separator, second film by the air inlet of the second membrane separator
The gas of the infiltration mouth discharge of separator is fed directly at the first compressor set air inlet by pipeline, is re-started pre-
Processing, continue to carry out multi-cycle separation with gas；The gas of the gas outlet discharge of second membrane separator enters SF6Liquefied storage
Module carries out liquefied storage；
Step 3: vent gas treatment：The gas of the first membrane separator infiltration mouth discharge, after being stored by buffer tank, warp
Enter tertiary membrane separator after crossing the second compressor boost, after tertiary membrane separator separation, the tertiary membrane separator
Permeate SF in the gas of mouth discharge6Volume content can be discharged directly less than 1000PPm as defined in safety in production；It is described
The gas of tertiary membrane separator gas outlet discharge is separated into the 4th membrane separator, the 4th membrane separator infiltration mouth row
The gas gone out, by carrying out multi-cycle separation again after the pressurization of the second compressor in Pipeline transport to the buffer tank；It is described
The gas of 4th membrane separator gas outlet discharge enters SF6Liquefied storage module carries out liquefied storage；
Step 4: SF6Liquefied storage processing：The gas and the 4th film of the gas outlet discharge of second membrane separator
The gas of separator gas outlet discharge, into SF6Liquefied storage module, pass through refrigeration unit after the 3rd compressor compresses
It is transported in storage tank and stores after cryogenic liquefaction.
Preferably, before the pretreatment of mix insulation gas, vacuumize process is carried out to recovery system with vavuum pump.
Preferably, mix insulation gas pressure after first compressor set is 1.2Mpa.
Preferably, mix insulation gas temperature after the heater is 45 DEG C.
The present invention achieves following advantageous effects relative to prior art：
1st, the quick recovery system of mix insulation gas provided by the invention and method, using membrane separator to mix insulation gas
Body carries out multi-stage separation, to SF6The separating effect of gas is preferable；By the SF for the high concentration isolated in mix insulation gas6Gas
Carry out low temperature liquid storage, the SF isolated6N in gas2Content is extremely low, thus is not present largely during storage in liquid
Can not storage in liquid N2, pressure of storage tank rise is slow, can continue mass storage liquid SF6, reduce storage gas recovery
SF6The demand of container, the difficulty and workload of recovery operation are reduced, be greatly reduced equipment, material and the cost of transport.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to institute in embodiment
The accompanying drawing needed to use is briefly described, it should be apparent that, drawings in the following description are only some implementations of the present invention
Example, for those of ordinary skill in the art, without having to pay creative labor, can also be according to these accompanying drawings
Obtain other accompanying drawings.
Fig. 1 is the structural representation of the quick recovery system of mix insulation gas in the present invention；
In figure：1- preprocessors, the compressor sets of 2- first, 3- filters, 4- heaters, the membrane separators of 5- first, 6-
Two membrane separators, 7- tertiary membranes separator, the membrane separators of 8- the 4th, 9- buffer tanks, the compressors of 10- second, 11- mix insulation gas
Body air inlet, 12- exhaust outlets, 13- infiltration mouth, 14- check valves, the compressors of 15- the 3rd, 16- refrigeration units, 17- holding vessels,
18- vavuum pumps, 19- magnetic valves.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
It is an object of the invention to provide a kind of quick recovery system of mix insulation gas and method, deposited with solving prior art
The problem of.
In order to facilitate the understanding of the purposes, features and advantages of the present invention, it is below in conjunction with the accompanying drawings and specific real
Applying mode, the present invention is further detailed explanation.
A kind of quick recovery system of mix insulation gas is provided in the present embodiment, as shown in figure 1, including pre-processing mould
Block, mixed gas UF membrane module, SF6Liquefied storage module and vent gas treatment module；
Pretreatment module includes preprocessor 1, the first compressor set 2, filter 3 and heater 4, wherein preprocessor 1
Inlet end be connected by pipeline with mix insulation gas inlet 11, the outlet side of preprocessor 1 and the first compressor set 2,
Filter 3 and heater 4 are sequentially connected by pipeline, wherein the first compressor set 2 by least one compressor set into, with meet
The boost demand of gas；
Mixed gas UF membrane module includes being internally provided with the first membrane separator 5 and the second UF membrane of hollow-fibre membrane
Device 6, wherein the air inlet of the first membrane separator 5 is connected with the gas outlet of heater 4 by pipeline, the first membrane separator 5 goes out
Gas port is connected by pipeline with the air inlet of the second membrane separator 6, and the gas outlet of the second membrane separator 6 passes through pipeline and SF6Liquid
Change storage module connection, the infiltration mouth 13 of the second membrane separator 6 is connected by the pipeline of pipeline and the inlet port of the first compressor set 2
Connect；
Vent gas treatment module includes being internally provided with the membrane separator 8 of tertiary membrane separator 7 and the 4th of hollow-fibre membrane, the
The air inlet of three membrane separators 7 is connected by pipeline with the infiltration mouth 13 of the first membrane separator 5, the first membrane separator 5 and the 3rd
Check valve 14, the compressor 10 of buffer tank 9 and second are disposed with pipeline between membrane separator 7, tertiary membrane separator 7
Gas outlet is connected by pipeline with the air inlet of the 4th membrane separator 8, and the gas outlet of the 4th membrane separator 8 passes through pipeline and SF6
Liquefied storage module connects；The infiltration mouth 13 of tertiary membrane separator 7 is connected by pipeline with exhaust outlet 12, the 4th membrane separator 8
Infiltration mouth 13 be connected by pipeline with buffer tank 9；
Pipeline on the pipeline at infiltration mouth 13 end of the second membrane separator 6, between tertiary membrane separator 7 and exhaust outlet 12
Check valve 14 is provided with pipeline between upper, the 4th membrane separator 8 and buffer tank 9；Second membrane separator 6 and the 3rd compression
There is a check valve 14 on pipeline between machine 15, be also equipped with the pipeline between the 4th membrane separator 8 and the 3rd compressor 15
One check valve 14, the setting of check valve 14 is to prevent the gas backstreaming of the relative gas outlet discharge of the pipeline where it.
In the present embodiment, SF6Liquefied storage module includes the 3rd compressor 15, the refrigeration unit being sequentially connected by pipeline
16 and holding vessel 17, the gas outlet of the second membrane separator 6 and the 4th membrane separator 8 is connected with the 3rd compressor 15 respectively by pipeline
Connect, the qualified SF of levels of the second membrane separator 6 and the discharge of the gas outlet of the 4th membrane separator 86Gas enters the 3rd compression
To being compressed, refrigeration unit 16 carries out being transported to holding vessel 17 after cryogenic liquefaction to it afterwards stores machine 15.
In the quick recovery system of mix insulation gas that the present embodiment provides, vavuum pump 18 is additionally provided with, vavuum pump 18 is logical
Cross pipeline and fourth membrane separator 8 and vent gas treatment mould of two articles of pipelines of vavuum pump 18 respectively with the inlet port of preprocessor 1
Pipeline connection between block, magnetic valve 19 is provided with two pipelines of vavuum pump 18, and magnetic valve 19 is used to control vavuum pump 18
The break-make of pipeline, vavuum pump 18 are used for before system carries out mix insulation gas mask work to the vacuumize process of system, kept away
Exempt from the insulating gas of gaseous contamination recovery internal before system use.
The present embodiment additionally provides a kind of method that mix insulation gas quickly reclaims, and this method is exhausted in above-mentioned mixing
Made on the basis of the quick recovery system of edge gas, below in conjunction with related design parameter value in operation, mix insulation gas is described in detail
The specific steps of body recovery：
Step 1: mix insulation gas pre-processes：Mix insulation gas is entered by mix insulation gas inlet 11, successively
By preprocessor 1, the first compressor set 2, filter 3 and heater 4, preprocessor 1 filters the decomposition production in adsorbed gas
The impurity such as thing, moisture, the first compressor set 2 include at least one compressor, to ensure the pressure needed for the separation of mix insulation gas
Power, mix insulation gas pressure after the first compressor set 2 is 1.2Mpa in the present embodiment, and the filtering of filter 3 ensures mixing
Dust granules particle diameter is less than 0.01 μm in insulating gas；Mix insulation gas is heated to 45 DEG C by heater 4, ensures separation temperature
It is required that；
Step 2: mix insulation gas separating treatment：Mix insulation gas by pretreatment, initially enter the first film point
From the permeability and separation of device 5, the mix insulation gas after the separation of the first membrane separator 5, discharged in the first membrane separator 5 infiltration mouth 13
Gas contains the SF of 0.91% concentration6, remaining is N2, it is impossible to reach direct discharge standard, cache and locate into vent gas treatment module
Reason；The SF of the outlet port output of first membrane separator 56Volumetric concentration is 71.76%, is continued by the second membrane separator 6
Air inlet is delivered into the second membrane separator 6, and the gas of infiltration mouth 13 discharge of the second membrane separator 6 contains 4.84% concentration
SF6, it is fed directly to by pipeline at the air inlet of the first compressor set 2, re-starts pretreatment, continues to be followed with gas
Ring separates；The SF of the gas outlet of second membrane separator 6 discharge6Concentration is 90.93%, into SF6Liquefied storage module carries out liquefaction storage
Deposit；
Step 3: vent gas treatment：The SF that the gas that first membrane separator 5 infiltration mouth 13 is discharged contains 0.91% concentration6, lead to
After crossing the storage of buffer tank 9, enter tertiary membrane separator 7 after the supercharging of the second compressor 10, separated through tertiary membrane separator 7
Afterwards, SF in the gas that the infiltration mouth 13 of tertiary membrane separator 7 is discharged6Volume content is 600ppm, less than as defined in safety in production
1000PPm, can directly it be discharged；SF in the gas outlet of tertiary membrane separator 76Concentration 9.35%, into the 4th membrane separator 8
Separated, the SF of the infiltration discharge of mouth 13 of the 4th membrane separator 86Gas concentration is 2.22%, passes through Pipeline transport to caching
Multi-cycle separation is carried out again after the pressurization of the second compressor 10 in tank 9；In the gas of the gas outlet discharge of 4th membrane separator 8
SF6Concentration be 92.75%, into SF6Liquefied storage module carries out liquefied storage；
Step 4: SF6Liquefied storage processing：The SF of the gas outlet discharge of second membrane separator 66Concentration is 90.93%, the
SF in the gas of the gas outlet discharge of four membrane separators 86Concentration be 92.75%, into SF6Liquefied storage processing module, pass through
Stored after the compression of 3rd compressor 15 by being transported to after the cryogenic liquefaction of refrigeration unit 16 in holding vessel 17.
In the present embodiment, before the pretreatment of mix insulation gas, it is also necessary to recovery system take out very with vavuum pump 18
Manage in vacancy.
It is it should be noted that each in the mixed gas UF membrane module separated in the present invention to mix insulation gas
Individual membrane separator, using membrane separation technique, its main operational principle is being pressed according to each gas component in mix insulation gas
Under the promotion of power, separated by the way that film is different with respect to transfer rate to realize.Common gas has by the separating mechanism of film at present
Two kinds：First, the micropore diffusion mechanism that gas passes through perforated membrane；Second, the dissolving diffusion mechanism that gas passes through non-porous film；The present invention
Middle SF6Gas and N2Separation using nonporous membrane (also known as homogeneous membrane) penetration mechanism.Gas component acts in pressure
Under, the surface of film is dissolved in the high-pressure side of film first, then along concentration gradient absorption, dissolving, diffusion, precipitation, ease in film
Go out, be delivered to the opposite side (infiltration mouth 13 side) of film, realize the separation of two kinds of component gas.
Table 3-1 divides perforated membrane gas separation membrane characteristic
From above-mentioned table 3-1, in order to improve the gas permeation amount of organic nonporous membrane, it is necessary to increase infiltration coefficient, pressure
Power difference and film surface area and reduction film thickness.Herein, in order to improve the separative efficiency of mixed gas, infiltration system must be selected
The larger film of number difference, that is, wish that film has higher selectivity and larger permeability to a certain component A in gaseous mixture, and to another
Group B only has relatively low selectivity and less permeability, could so obtain relatively satisfactory purification effect.
In order to increase UF membrane surface area, membrane separator (assembly unit) structure mountain plate and frame brings up to spiral wound, pipe
Formula often improves a kind of structure, separation surface area is in the increase of geometric progression amount, with hollow fiber form seperation film so that hollow fiber form
Largest surface area.
Select hollow-fibre membrane in the present invention, its material is makrolon, the membrane in use, predominant gas with
The gas separation factor α that must be separated, which is more than 3, to be separated, the seepage velocity parameter list 3-2 (units 10 of predominant gas- 6scc/cm2cmHgsec)：
Table 3-2 predominant gas infiltration rate tables
| Gas | H2O_V | SO2 | H2 | He | H2S | CO2 | MeOH | O2 | Ar |
| Infiltration rate | 2000 | 400 | 210 | 150 | 110 | 81 | 20.8 | 18 | 6.9 |
| Gas | C2H4 | CO | CH4 | N2 | C2H6 | Xe | SF6 | ||
| Infiltration rate | 4 | 4.17 | 2.4 | 2.4 | 1.4 | 0.5 | 0.04 |
When mix insulation gas quickly reclaims, predominant gas is by SF6And N2Composition, also some other educt gas or
Impurity, these gases and SF6Separation factor α such as table 3-3：
Table 3-3SF6The separation factor of gas and relevant gaseous components
| Gas | H2O_V | SO2 | H2S | CO2 | CO | N2 |
| Separation factor | 50000 | 10000 | 2750 | 2025 | 104.25 | 60 |
From table 3-3, these gas separation factors are much larger than 3, use the membrane separator energy with the hollow-fibre membrane
Enough high-efficient purification separation SF6With other foreign gases.
The principle and embodiment of the present invention are set forth invention applies specific case, above example is said
It is bright to be only intended to help the method and its core concept for understanding the present invention；Meanwhile for those of ordinary skill in the art, foundation
The thought of the present invention, in specific embodiments and applications there will be changes.To sum up, this specification content should not manage
Solve as limitation of the present invention.
Claims (10)
- A kind of 1. quick recovery system of mix insulation gas, it is characterised in that：Including pretreatment module, mixed gas UF membrane mould Block, SF6Liquefied storage module and vent gas treatment module；The pretreatment module includes preprocessor, the first compressor set, filter and heater, wherein the preprocessor Inlet end is connected by pipeline with mix insulation gas inlet, the outlet side of the preprocessor and first compressor Group, the filter and the heater are sequentially connected by pipeline；The mixed gas UF membrane module includes the first membrane separator and the second membrane separator, wherein first membrane separator Air inlet be connected with the gas outlet of the heater by pipeline, the gas outlet of first membrane separator passes through pipeline and institute The air inlet connection of the second membrane separator is stated, the gas outlet of second membrane separator passes through pipeline and the SF6Liquefied storage Module is connected, and the infiltration mouth of second membrane separator is connected by the pipeline of pipeline and the first compressor set inlet port Connect；The vent gas treatment module includes tertiary membrane separator and the 4th membrane separator, and the air inlet of the tertiary membrane separator leads to The infiltration mouth that pipeline is crossed with first membrane separator is connected, between first membrane separator and the tertiary membrane separator Be disposed with check valve, buffer tank and the second compressor on pipeline, the gas outlet of the tertiary membrane separator by pipeline with The air inlet connection of 4th membrane separator, the gas outlet of the 4th membrane separator passes through pipeline and the SF6Liquefaction storage Storing module is connected, and the infiltration mouth of the tertiary membrane separator is connected by pipeline with exhaust outlet, and the 4th membrane separator oozes Saturating mouth is connected by pipeline with the buffer tank；Pipeline on the pipeline at the infiltration mouth end of second membrane separator, between the tertiary membrane separator and the exhaust outlet Check valve is provided with pipeline between upper, the 4th membrane separator and the buffer tank.
- 2. the quick recovery system of mix insulation gas according to claim 1, it is characterised in that：The SF6Liquefied storage mould Block includes the 3rd compressor, refrigeration unit and the holding vessel that are sequentially connected by pipeline, second membrane separator and described the The gas outlet of four membrane separators is connected with the 3rd compressor respectively by pipeline.
- 3. the quick recovery system of mix insulation gas according to claim 2, it is characterised in that：Second membrane separator There is a check valve on pipeline between the 3rd compressor, between the 4th membrane separator and the 3rd compressor A check valve is provided with pipeline.
- 4. the quick recovery system of mix insulation gas according to claim 1, it is characterised in that：First UF membrane Hollow-fibre membrane is provided with inside device, second membrane separator, the tertiary membrane separator and the 4th membrane separator.
- 5. the quick recovery system of mix insulation gas according to claim 1, it is characterised in that：First compressor set By at least one compressor set into.
- 6. the quick recovery system of mix insulation gas according to claim 1, it is characterised in that：Also include vavuum pump, institute State vavuum pump and pass through two articles of vacuum pump pipelines pipeline with the preprocessor inlet port and the 4th UF membrane respectively Device and SF6Pipeline connection between liquefied storage module, magnetic valve is provided with two vacuum pump pipelines.
- 7. a kind of method that mix insulation gas quickly reclaims, it is characterised in that including following recycling step：Step 1: mix insulation gas pre-processes：Mix insulation gas is entered by mix insulation gas inlet, successively by pre- Processor, the first compressor set, filter and heater, the impurity in the preprocessor filtering adsorbed gas, described first Compressor set provides the pressure needed for the separation of mix insulation gas；The filter filtering ensures dust in mix insulation gas Grain particle diameter is less than 0.01 μm；The heater heats to mix insulation gas, ensures separation temperature requirement；Step 2: mix insulation gas separating treatment：Mix insulation gas by pretreatment, initially enters the first membrane separator Permeability and separation, the mix insulation gas after the first membrane separator separation, in first membrane separator infiltration mouth discharge Gas can not reach direct discharge standard, cache and handle into vent gas treatment module；The gas outlet of first membrane separator The gas of output is held, is delivered into by the air inlet of the second membrane separator in second membrane separator, second UF membrane The gas of the infiltration mouth discharge of device is fed directly at the first compressor set air inlet by pipeline, re-starts pre- place Reason, continue to carry out multi-cycle separation with gas；The gas of the gas outlet discharge of second membrane separator enters SF6Liquefied storage mould Block carries out liquefied storage；Step 3: vent gas treatment：The gas of first membrane separator infiltration mouth discharge, after being stored by buffer tank, by the Enter tertiary membrane separator after two compressor boosts, after tertiary membrane separator separation, the tertiary membrane separator infiltration SF in the gas of mouth discharge6Volume content can be discharged directly less than 1000PPm as defined in safety in production；Described 3rd The gas of membrane separator gas outlet discharge is separated into the 4th membrane separator, the 4th membrane separator infiltration mouth discharge Gas, by carrying out multi-cycle separation again after the pressurization of the second compressor in Pipeline transport to the buffer tank；Described 4th The gas of membrane separator gas outlet discharge enters SF6Liquefied storage module carries out liquefied storage；Step 4: SF6Liquefied storage processing：The gas and the 4th UF membrane of the gas outlet discharge of second membrane separator The gas of device gas outlet discharge, into SF6Liquefied storage module, freezed after the 3rd compressor compresses by refrigeration unit It is transported in storage tank and stores after liquefaction.
- 8. mix insulation gas fastly recovering according to claim 7, it is characterised in that：It is pre- in mix insulation gas Before processing, vacuumize process is carried out to recovery system with vavuum pump.
- 9. mix insulation gas fastly recovering according to claim 7, it is characterised in that：Mix insulation gas passes through Pressure is 1.2Mpa after first compressor set.
- 10. mix insulation gas fastly recovering according to claim 7, it is characterised in that：Mix insulation gas passes through Temperature is 45 DEG C after crossing the heater.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108404613A (en) * | 2018-01-09 | 2018-08-17 | 丁五行 | The separator of mixed gas |
| CN108760666A (en) * | 2018-03-01 | 2018-11-06 | 国网湖北省电力公司咸宁供电公司 | A kind of interior SF6Gas leakage monitoring and Recovery Purifying processing system |
| CN109850854A (en) * | 2018-12-21 | 2019-06-07 | 河南平高电气股份有限公司 | A kind of mixed gas purification separation and recovery system |
| CN110794269A (en) * | 2019-11-07 | 2020-02-14 | 云南电网有限责任公司电力科学研究院 | Green insulating gas insulating strength calculation method |
| 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 |
| CN112748217A (en) * | 2020-12-14 | 2021-05-04 | 河南平高电气股份有限公司 | On-line detection device and gas recovery system using same |
| CN113877228A (en) * | 2021-09-30 | 2022-01-04 | 河南平高电气股份有限公司 | Rectification and purification system for sulfur hexafluoride recovered gas |
| 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 |
| 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 |
| CN114100309A (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 GIS indoor burst fault6Quick recovery system and device for gas leakage |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108404613A (en) * | 2018-01-09 | 2018-08-17 | 丁五行 | The separator of mixed gas |
| CN108760666A (en) * | 2018-03-01 | 2018-11-06 | 国网湖北省电力公司咸宁供电公司 | A kind of interior SF6Gas leakage monitoring and Recovery Purifying processing system |
| CN109850854A (en) * | 2018-12-21 | 2019-06-07 | 河南平高电气股份有限公司 | A kind of mixed gas purification separation and recovery system |
| CN110794269A (en) * | 2019-11-07 | 2020-02-14 | 云南电网有限责任公司电力科学研究院 | Green insulating gas insulating strength calculation method |
| CN111547685B (en) * | 2020-04-10 | 2022-01-25 | 国网河北省电力有限公司电力科学研究院 | Low-concentration SF6 gas recovery processing device and method in closed space |
| 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 |
| CN112748217A (en) * | 2020-12-14 | 2021-05-04 | 河南平高电气股份有限公司 | On-line detection device and gas recovery system using same |
| CN113877228A (en) * | 2021-09-30 | 2022-01-04 | 河南平高电气股份有限公司 | Rectification and purification system for sulfur hexafluoride recovered gas |
| CN113877228B (en) * | 2021-09-30 | 2023-04-18 | 河南平高电气股份有限公司 | Rectification and purification system for sulfur hexafluoride recovery gas |
| 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 |
| 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 |
| CN114100309A (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 GIS indoor burst fault6Quick recovery system and device for gas leakage |
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