CN107715493A - A kind of piece-rate system and separation method of sulfur hexafluoride and carbon tetrafluoride - Google Patents

A kind of piece-rate system and separation method of sulfur hexafluoride and carbon tetrafluoride Download PDF

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Publication number
CN107715493A
CN107715493A CN201711191717.9A CN201711191717A CN107715493A CN 107715493 A CN107715493 A CN 107715493A CN 201711191717 A CN201711191717 A CN 201711191717A CN 107715493 A CN107715493 A CN 107715493A
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China
Prior art keywords
adsorption tower
clamping jaw
clamping part
outlet
surge tank
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Pending
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CN201711191717.9A
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Chinese (zh)
Inventor
来文青
孟杰
王永红
钱文晓
苏镇西
马凤翔
李建国
汪宪忠
赫树开
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State Grid Corp of China SGCC
Electric Power Research Institute of State Grid Anhui Electric Power Co Ltd
Henan Relations Co Ltd
Electric Power Research Institute of State Grid Eastern Inner Mongolia Power Co Ltd
Original Assignee
State Grid Corp of China SGCC
Electric Power Research Institute of State Grid Anhui Electric Power Co Ltd
Henan Relations Co Ltd
Electric Power Research Institute of State Grid Eastern Inner Mongolia Power Co Ltd
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Application filed by State Grid Corp of China SGCC, Electric Power Research Institute of State Grid Anhui Electric Power Co Ltd, Henan Relations Co Ltd, Electric Power Research Institute of State Grid Eastern Inner Mongolia Power Co Ltd filed Critical State Grid Corp of China SGCC
Priority to CN201711191717.9A priority Critical patent/CN107715493A/en
Publication of CN107715493A publication Critical patent/CN107715493A/en
Pending legal-status Critical Current

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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
    • 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
    • B01D53/002—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 condensation
    • 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
    • B01D53/26—Drying gases or vapours
    • B01D53/261—Drying gases or vapours by adsorption
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/10—Inorganic adsorbents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/10—Inorganic adsorbents
    • B01D2253/102—Carbon
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/10—Inorganic adsorbents
    • B01D2253/104—Alumina
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2256/00—Main component in the product gas stream after treatment
    • B01D2256/26—Halogens or halogen compounds
    • 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
    • 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
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Separation By Low-Temperature Treatments (AREA)

Abstract

The invention discloses the piece-rate system and separation method of a kind of sulfur hexafluoride and carbon tetrafluoride, including reversing unit, buffer cell, processing unit and cryogenic separation unit, wherein, reversing unit is inverter, for clamping steel cylinder, and rotate and be inverted, the mixture after the liquefaction in steel cylinder is smoothly flowed out；Buffer cell includes evaporator and the first surge tank, and the import of evaporator and the outlet of steel cylinder are connected, and the outlet of evaporator is connected with the import of the first surge tank；Processing unit includes adsorption tower, and the import of adsorption tower is connected with the outlet of the first surge tank, for carrying out Adsorption to the impurity in mixture；Cryogenic separation unit includes heat exchanger and low-temperature fractionating tower, and the outlet of adsorption tower and the thermal medium entrance of heat exchanger connect, and the cold medium outlet of heat exchanger is connected with the entrance of low-temperature fractionating tower.

Description

A kind of piece-rate system and separation method of sulfur hexafluoride and carbon tetrafluoride
Technical field
The invention belongs to mix insulation field of gas purification, and in particular to a kind of segregative line of sulfur hexafluoride and carbon tetrafluoride System and separation method.
Background technology
At present, due to SF6Gas has excellent insulation and arc extinction performance, is widely used in breaker, still, Under cold environment temperature, the SF under certain pressure6Gas will liquefy, and make SF6The pressure or density of gas reduce, and it insulate Will accordingly it be reduced with arc extinction performance.Found by research, in SF6Other a certain proportion of inert gases are mixed into gas, can Effectively solve the problem, wherein, using it is more be SF6And CF4Mixed gas as insulating gas.The insulating gas is It is widely used in SF6In the high-voltage electrical equipments such as gas-break switch, GIS, charging cable, inflation power transfer conduit.
SF6Gas by long-term charging operation or can decompose under discharge process, in the presence of air and moisture Corrosive SO can be generated2、SOF2、HF、SOF4And SO2F2Etc. compound, switch insulation easily makes moist, and insulating properties declines, and exists Potential safety hazard.It is generally believed that SF6And CF4Mixed gas breaker under normal operating conditions, the decomposition amount of pernicious gas It not should be greater than 10-4Magnitude.And breaker is in the process of running, the abrasion between metal causes hardware to come off and changing Learn to decompose in course of reaction and obtain dust granules etc., can all cause SF6And CF4Mixed gas in contain certain solid impurity, These solid impurities are to SF6And CF4The breakdown voltage of mixed gas etc. have a great impact.So using to a certain extent SF6And CF4Mixed gas can not meet to require.And SF6And CF4All it is the gas for being prohibited discharge, if discharge air, Serious harm can be caused to environment.It is therefore desirable to SF6And CF4Mixed gas carry out purification separation, cycling and reutilization.But It is at present both at home and abroad also not to the ripe purification separation technology of the mix insulation gas, it is difficult to realize following for mix insulation gas Ring recycles.
The content of the invention
For technical problem present in above-mentioned prior art, it is an object of the invention to provide a kind of sulfur hexafluoride and tetrafluoro Change the piece-rate system and separation method of carbon.
In order to solve the above technical problems, the technical scheme is that：
A kind of piece-rate system of sulfur hexafluoride and carbon tetrafluoride, including reverse unit, buffer cell, processing unit and deep cooling Separative element, wherein, reversing unit is inverter, for clamping steel cylinder, and rotates and is inverted, mixes the liquid in steel cylinder Compound smoothly flows out；
Buffer cell includes evaporator and the first surge tank, and the import of evaporator and the outlet of steel cylinder connect, evaporator Outlet is connected with the import of the first surge tank；
Processing unit includes adsorption tower, and the import of adsorption tower is connected with the outlet of the first surge tank, for mixture In impurity carry out Adsorption；
Cryogenic separation unit includes heat exchanger and low-temperature fractionating tower, and the outlet of adsorption tower and the thermal medium entrance of heat exchanger connect Connect, the thermal medium outlet of heat exchanger and the entrance of low-temperature fractionating tower connect.
Heat exchanger is for being cooled down to the gaseous mixture after adsorption treatment, being easy to follow-up cryogenic rectification process.
SF in steel cylinder6It is existing in liquid form, so gas progress heat exchange first is become into gaseous state, avoids Gasification occurs in the pipeline of buffer cell and absorbs heat, causes pipeline blockage, it is desirable to as far as possible by pending steel cylinder SF6Come out in liquid form, processing unit is entered after regasifying.
In experiments it is found that the SF after liquefaction6And CF4Mixture from reverse unit flow into buffer cell during, The problem of pipeline freezing often occurs, find that this is due to that surge tank is the heat-transfer effect made of steel plate by research Unobvious.Therefore, using evaporator to the SF after liquefaction6And CF4Mixture heated, liquid is changed into gas, a side Face can solve the problems, such as, because pipeline freezing causes liquid not flow, on the other hand, after liquid is changed into gas, to be easy to reality The process of now follow-up adsorption treatment preliminary purification.
Preferably, the inverter includes chassis, column, the first clamping jaw and the second clamping jaw, and the bottom of chassis is provided with Wheel assembly, the upper end of chassis set the column, are provided with lift structure on column, the first clamping jaw and the second clamping jaw pass through company Fitting is arranged on the lift structure, and the connector is rotatable, makes the line of the first clamping jaw and the second clamping jaw relative to water Square to angle change.
Inverter will be clamped by the first clamping jaw and the second clamping jaw for the steel cylinder for holding liquefied gas, pass through rotatable connection Part drives the first clamping jaw and the rotation of the second clamping jaw, and then drives steel cylinder to rotate, and the liquid in steel cylinder is poured out.
It is further preferred that the lift structure is turbine and worm mechanism, worm screw is vertically set, turbine and first Handwheel connects.
The rotation of turbine is controlled by the first handwheel, drives worm screw to move back and forth, realizes enhanced feature.
It is further preferred that the connector is connecting rod, connecting rod is connected by attachment structure with the second handwheel.
The second handwheel of artificial rotation, it is possible to achieve the rotation of connecting rod.
It is further preferred that the first described clamping jaw includes the first V-type clamping part and the second V-type clamping part, the first V-type folder Hold portion and the second V-type clamping part is oppositely arranged, surround clamping chamber；
Second clamping jaw includes the 3rd V-type clamping part and the 4th V-type clamping part, the 3rd V-type clamping part and the 4th V-type clamping part It is oppositely arranged, surrounds clamping chamber.
Still more preferably, the end of the first V-type clamping part and the second V-type clamping part is provided with first through hole, and first Through hole and the first fastening bolt coordinate, for the first clamping jaw to be fixed.
Still more preferably, the end of the 3rd V-type clamping part and the 4th V-type clamping part is provided with the second through hole, and second Through hole and the second fastening bolt coordinate, for the second clamping jaw to be fixed.It is easy to clamp steel cylinder, prevents coming off for steel cylinder.
Still more preferably, it is provided with antiskid glue cushion in first clamping jaw and the second clamping jaw.Increase with steel cylinder it Between frictional force, prevent the landing of steel cylinder, with ensure steel cylinder reverse be smoothed out.
It is further preferred that the wheel assembly includes the first directional wheel, the second directional wheel, the first universal wheel and the 20000th To wheel, the first directional wheel and the second directional wheel are arranged at the front end of chassis, and the first universal wheel and the second universal wheel are arranged at chassis Rear end.
Preferably, the processing unit includes being sequentially connected first filter, vavuum pump, adsorption tower, lye tank and the Tow filtrator, first filter are connected with the outlet of first surge tank, the thermal medium of the second filter and the heat exchanger Entrance is connected, and solid absorbent is filled with adsorption tower.
First filter can filter to the solid impurity being mingled with gaseous mixture, prevent solid impurity in adsorption tower Solid absorbent result in blockage, the service life of solid absorbent can be effectively improved.Second filter can be acid to removing The gaseous mixture of impurity is filtered, and avoids carrying the solid particles such as solid absorbent, follow-up handling process is impacted.
Preferably, the adsorption tower includes main adsorption tower and auxiliary adsorption tower, and main adsorption tower and auxiliary adsorption tower are in parallel.It is mixed When conjunction gas flow is big, main adsorption tower and auxiliary adsorption tower can use simultaneously, improve adsorption efficiency, gaseous mixture scale of construction hour, main suction Attached tower and auxiliary adsorption tower are used alternatingly, and are easy to repair, ensure being carried out continuously for technique.
It is further preferred that the solid absorbent is by F-03 molecular sieves, activated alumina, 5A molecular sieves and activated silica gel Composition.
F-03 molecular sieves are mainly used in removing the SF in gaseous mixture6The catabolites such as the sulfide in gas, 5A molecular sieves It is mainly used in removing micro-moisture, carbon dioxide, oil gas and the hydrocarbons in mixed gas, activated alumina is defluorinating agent, For removing the hydrogenation material of the fluorine element in gaseous mixture, activated silica gel can remove the moisture in gaseous mixture, and can prevent micro- Amount moisture impacts to molecular sieve.The hybrid solid adsorbent can effectively be removed the impurity in gaseous mixture.
Preferably, the power unit include be sequentially connected the first ball valve, pressure-reducing valve, the second surge tank, compressor and Second ball valve, the second ball valve are connected with steel cylinder.Power unit is used for the SF after purification6Gas is with liquid hot-metal carburized steel bottle.
It is further preferred that first pressure table is connected between the first ball valve and pressure-reducing valve.For showing the gas of entrance Body pressure, it is easy to that pressure-reducing valve is adjusted.Second surge tank makes the SF after purification6The pressure of gas is balanced, to prevent SF6Operation of the pressure pulse of gas to compressor impacts.
It is further preferred that the first safety valve is provided between the second surge tank and compressor.Control gas in surge tank Mobility status into compressor.
It is further preferred that the second safety valve is provided between the compressor and the second ball valve.The outlet of compressor is set Safety valve is put, compressor pump outlet pressure is protected.
Still more preferably, it is provided with second pressure gauge between second safety valve and the second ball valve.
A kind of separation method of sulfur hexafluoride and carbon tetrafluoride, comprises the following steps：
It is loaded with liquefaction SF6And CF4After the steel cylinder of gaseous mixture is reversed device clamping, it is promoted at setting height, reverses, The liquid in steel cylinder is flowed to buffer cell, 0.5- is decompressed to through evaporator heating and gasifying, and through the first surge tank buffering After 0.7MPa, adsorption-edulcoration is carried out into processing unit, SF is carried out subsequently into cryogenic separation unit6And CF4Separation.
Preferably, the temperature in cryogenic separation unit in low-temperature fractionating tower is -80 DEG C.
Preferably, the solid absorbent in processing unit is by F-03 molecular sieves, activated alumina, 5A molecular sieves and activated silica Glue forms.
Still more preferably, F-03 molecular sieves in solid absorbent, activated alumina, 5A molecular sieves and activated silica gel It is identical in quality.
Beneficial effects of the present invention are：
Using evaporator to the SF after liquefaction6And CF4Mixture heated, liquid is changed into gas, on the one hand may be used To solve the problems, such as because pipeline freezing causes liquid not flow, on the other hand, after liquid is changed into gas, after being easy to implement The process of continuous adsorption treatment preliminary purification.
The buffer cell and processing unit of the present invention is easily realized to SF6And CF4Gaseous mixture cleaned, it is easier to it is real The preliminary purification of existing gaseous mixture, is SF6And CF4Separation and recovery provide safeguard.
Brief description of the drawings
The Figure of description for forming the part of the application is used for providing further understanding of the present application, and the application's shows Meaning property embodiment and its illustrate be used for explain the application, do not form the improper restriction to the application.
Fig. 1 is the overall structure diagram of the piece-rate system of the present invention；
Fig. 2 is the structural representation of the reversing unit of the present invention；
Fig. 3 is the structural representation of the buffer cell of the present invention；
Fig. 4 is the structural representation of the processing unit of the present invention；
Fig. 5 is the structural representation of the cryogenic separation unit of the present invention；
Fig. 6 is the structural representation of the power unit of the present invention.
Wherein, 1 unit, is reversed, 2, buffer cell, 3, processing unit, 4, cryogenic separation unit, 5, power unit, 6, the One clamping jaw, the 7, second clamping jaw, the 8, first directional wheel, the 9, first universal wheel, 10, chassis, the 11, first handwheel, 12, column, 13, Two handwheels, 14, evaporator, the 15, first surge tank, 16, first filter, 17, vavuum pump, 18, main adsorption tower, 19, lye tank, 20th, the second filter, 21, auxiliary adsorption tower, 22, heat exchanger, 23, refrigeration unit, 24, low-temperature fractionating tower, the 25, first ball valve, 26th, first pressure table, 27, pressure-reducing valve, the 28, second surge tank, the 29, first safety valve, 30, compressor, the 31, second safety valve, 32nd, second pressure gauge, the 33, second ball valve.
Embodiment
It is noted that described further below is all exemplary, it is intended to provides further instruction to the application.It is unless another Indicate, all technologies used herein and scientific terminology are with usual with the application person of an ordinary skill in the technical field The identical meanings of understanding.
It should be noted that term used herein above is merely to describe embodiment, and be not intended to restricted root According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singulative It is also intended to include plural form, additionally, it should be understood that, when in this manual using term "comprising" and/or " bag Include " when, it indicates existing characteristics, step, operation, device, component and/or combinations thereof.
As shown in figures 1 and 3, a kind of piece-rate system of sulfur hexafluoride and carbon tetrafluoride, including reverse unit 1, buffering list Member 2, processing unit 3 and cryogenic separation unit 4, wherein, reversing unit 1 is inverter, for clamping steel cylinder, and is rotated it It is inverted, the mixture after the liquefaction in steel cylinder is smoothly flowed out；Buffer cell 2 includes the surge tank 15 of evaporator 14 and first, steams Send out the import of device 14 and the outlet of steel cylinder connects, the outlet of evaporator 14 is connected with the import of the first surge tank 15；Processing unit 3 Include adsorption tower, the import of adsorption tower is connected with the outlet of the first surge tank 15, for being inhaled to the impurity in mixture Attached removal；Cryogenic separation unit 4 includes heat exchanger 22 and low-temperature fractionating tower 24, the outlet of adsorption tower and the thermal medium of heat exchanger 22 Entrance is connected, and the thermal medium outlet of heat exchanger 22 is connected with the entrance of low-temperature fractionating tower 24.
As shown in Fig. 2 inverter includes chassis 10, column 12, the first clamping jaw 6 and the second clamping jaw 7, the bottom of chassis 10 Wheel assembly is provided with, the upper end of chassis 10 sets the column 12, lift structure, the He of the first clamping jaw 6 are provided with column 12 Second clamping jaw 7 is arranged on the lift structure by connector, and the connector is rotatable, makes the first clamping jaw 6 and the second folder The line of pawl 7 changes relative to the angle of horizontal direction.
Inverter will be clamped by the first clamping jaw 6 and the second clamping jaw 7 for the steel cylinder for holding liquefied gas, be connected by rotating Fitting drives the first clamping jaw 6 and the second clamping jaw 7 to rotate, and then drives steel cylinder to rotate, and the liquid in steel cylinder is poured out.Lifting Structure is turbine and worm mechanism, and worm screw is vertically set, and turbine is connected with the first handwheel 11.Controlled by the first handwheel 11 The rotation of turbine, drive worm screw to move back and forth, realize enhanced feature.Connector is connecting rod, connecting rod by attachment structure with Second handwheel 13 connects.The second handwheel 13 of artificial rotation, it is possible to achieve the rotation of connecting rod.
First clamping jaw 6 includes the first V-type clamping part and the second V-type clamping part, the first V-type clamping part and the clamping of the second V-type Portion is oppositely arranged, and surrounds clamping chamber；Second clamping jaw 7 includes the 3rd V-type clamping part and the 4th V-type clamping part, the 3rd V-type clamping part It is oppositely arranged with the 4th V-type clamping part, surrounds clamping chamber.The end of first V-type clamping part and the second V-type clamping part is provided with One through hole, first through hole coordinates with the first fastening bolt, for the first clamping jaw 6 to be fixed.3rd V-type clamping part and the 4th V-type The end of clamping part is provided with the second through hole, and the second through hole and the second fastening bolt coordinate, for the second clamping jaw to be fixed.It is easy to Steel cylinder is clamped, prevents coming off for steel cylinder.
Antiskid glue cushion is provided with first clamping jaw 6 and the second clamping jaw 7.Frictional force between increase and steel cylinder, prevents steel The landing of bottle, to ensure being smoothed out for steel cylinder reversing.
Wheel assembly includes the first directional wheel 8, the second directional wheel, the first universal wheel 9 and the second universal wheel, the first directional wheel 8 and second directional wheel be arranged at the front end of chassis, the first universal wheel 9 and the second universal wheel are arranged at the rear end of chassis.
As shown in figure 4, processing unit 3 include be sequentially connected first filter 16, vavuum pump 17, adsorption tower, lye tank 19 and second filter 20, first filter 16 be connected with the outlet of first surge tank 15, the second filter 20 with it is described The thermal medium entrance connection of heat exchanger 22, adsorption tower is interior to be filled with solid absorbent.First filter 16 can be in gaseous mixture The solid impurity being mingled with is filtered, and prevents solid impurity from being resulted in blockage to the solid absorbent in adsorption tower, can effectively be carried The service life of high solid adsorbent.Second filter 20 can filter to the gaseous mixture for removing acid impurities, and avoiding will be solid The solid particles such as body adsorbent are carried, and follow-up handling process is impacted.
Adsorption tower includes main adsorption tower 18 and auxiliary adsorption tower 21, and main adsorption tower 18 and auxiliary adsorption tower 21 are in parallel.Mixing When gas flow is big, main adsorption tower 18 and auxiliary adsorption tower 21 can use simultaneously, improve adsorption efficiency, gaseous mixture scale of construction hour, main Adsorption tower 18 and auxiliary adsorption tower 21 are used alternatingly, and are easy to repair, ensure being carried out continuously for technique.
Solid absorbent is made up of F-03 molecular sieves, activated alumina, 5A molecular sieves and activated silica gel.F-03 molecular sieve masters It is used to remove the SF in gaseous mixture6The catabolites such as the sulfide in gas, 5A molecular sieves are mainly used in removing mixed gas In micro-moisture, carbon dioxide, oil gas and hydrocarbons, activated alumina is defluorinating agent, for removing the fluorine in gaseous mixture The hydrogenation material of element, activated silica gel can remove the moisture in gaseous mixture, and can prevent micro-moisture from causing shadow to molecular sieve Ring.The hybrid solid adsorbent can effectively be removed the impurity in gaseous mixture.
As shown in fig. 6, the power unit include be sequentially connected the first ball valve 25, pressure-reducing valve 27, the second surge tank 28, The ball valve 33 of compressor 30 and second, the second ball valve 33 are connected with steel cylinder.Power unit is used for the SF after purification6Gas is with liquid Hot-metal carburized steel bottle.
First pressure table 26 is connected between first ball valve 25 and pressure-reducing valve 27.For showing the gas pressure of entrance, It is easy to enter pressure-reducing valve the regulation of 27 rows.Second surge tank 28 makes the SF after purification6The pressure of gas is balanced, to prevent SF6Gas Operation of the pressure pulse of body to compressor 30 impacts.The first safety is provided between second surge tank 28 and compressor 30 Valve 29.Control mobility status of the gas into compressor 30 in the second surge tank 28.Set between the ball valve 33 of compressor 30 and second It is equipped with the first safety valve 29.The outlet of compressor 30 sets the second safety valve 31, and the pump discharge pressure of compressor 30 is protected. Second pressure gauge 32 is provided between second safety valve 31 and the second ball valve 33.
Reverse cell operation process：
Equipment is carried out arriving steel cylinder position, is adjusted to clamped position.
Press from both sides bottle：Steel cylinder is transported in place, two and half V-type clamping jaws above and below opening, and steel cylinder is fixed with bolt after clamping steel cylinder.
Lift bottle：After steel cylinder clamps, the handwheel for being welded on Ju Ping turbine and worms mechanism between column is shaken, the silk in the mechanism Thick stick drives steel cylinder to be moved up along column is parallel.During lifting bottle, overall weight is undertaken by column, it is ensured that leading screw lifting is made With without undertaking heavy burden effect.
Rolling bottle：Bottle is lifted to after specified altitude, shakes the handwheel of rolling bottle turbine and worm mechanism, you can shake steel cylinder to random angle Degree.Rolling bottle turbine and worm mechanism can ensure that steel cylinder arbitrarily rotates in positive and negative angle, and can lock at an arbitrary position.
Liquid in steel cylinder flows through evaporator and carries out heating and gasifying, and the gas after gasification, which enters in the first surge tank, to be depressurized to 0.6MPa, adsorption treatment is carried out in the gas flow processing unit after buffering, the impurity such as the impurity in gaseous mixture and moisture are inhaled Attached removing.SF is carried out subsequently into cryogenic separation unit6And CF4Separation, CF4Flowed out from the tower top of low-temperature fractionating tower, SF6From The bottom of towe outflow of low-temperature fractionating tower, flows to power unit, realizes SF6And CF4Separation.
Power unit workflow：
The first ball valve 25 and the second ball valve 33 are opened, then opens compressor, you can by the gas compression after processing, into steel Bottle.First ball valve 25 and the emergency service valve that the second ball valve 33 is power unit.
Pay attention to：Pressure-reducing valve ensure the gas after processing unit enter compressor before pressure narrow down to compressor operating suction pressure Power；Surge tank ensures to eliminate the pressure pulse at suction port of compressor；Second safety valve 31 of compressor outlet is to compressor outlet Gas protected；Cooling fan is set at compressor outlet, is filling bottle for being cooled down to the gas of compressor outlet Prepare.
The preferred embodiment of the application is the foregoing is only, is not limited to the application, for the skill of this area For art personnel, the application can have various modifications and variations.It is all within spirit herein and principle, made any repair Change, equivalent substitution, improvement etc., should be included within the protection domain of the application.

Claims (10)

  1. A kind of 1. piece-rate system of sulfur hexafluoride and carbon tetrafluoride, it is characterised in that：Including reversing unit, buffer cell, processing Unit and cryogenic separation unit, wherein, reversing unit is inverter, for clamping steel cylinder, and rotates and is inverted, makes steel cylinder In liquid mixture smoothly flow out；
    Buffer cell includes evaporator and the first surge tank, and the import of evaporator and the outlet of steel cylinder connect, the outlet of evaporator Import with the first surge tank is connected；
    Processing unit includes adsorption tower, and the import of adsorption tower is connected with the outlet of the first surge tank, in mixture Impurity carries out Adsorption；
    Cryogenic separation unit includes heat exchanger and low-temperature fractionating tower, and the outlet of adsorption tower and the thermal medium entrance of heat exchanger connect, The cold medium outlet of heat exchanger is connected with the entrance of low-temperature fractionating tower.
  2. 2. piece-rate system according to claim 1, it is characterised in that：The inverter includes chassis, column, the first folder Pawl and the second clamping jaw, the bottom of chassis are provided with wheel assembly, and the upper end of chassis sets the column, lifting is provided with column Structure, the first clamping jaw and the second clamping jaw are arranged on the lift structure by connector, and the connector is rotatable, makes first The line of clamping jaw and the second clamping jaw changes relative to the angle of horizontal direction；
    Preferably, the lift structure is turbine and worm mechanism, and worm screw is vertically set, and turbine is connected with the first handwheel；
    Preferably, the connector is connecting rod, and connecting rod is connected by attachment structure with the second handwheel；
    Preferably, the first described clamping jaw includes the first V-type clamping part and the second V-type clamping part, the first V-type clamping part and second V-type clamping part is oppositely arranged, and surrounds clamping chamber；
    Second clamping jaw includes the 3rd V-type clamping part and the 4th V-type clamping part, and the 3rd V-type clamping part and the 4th V-type clamping part are relative Set, surround clamping chamber.
  3. 3. piece-rate system according to claim 2, it is characterised in that：The end of first V-type clamping part and the second V-type clamping part End is provided with first through hole, and first through hole coordinates with the first fastening bolt, for the first clamping jaw to be fixed；
    Or, the 3rd the end of V-type clamping part and the 4th V-type clamping part be provided with the second through hole, the second through hole and the second fastening spiral shell Bolt coordinates, for the second clamping jaw to be fixed.
  4. 4. piece-rate system according to claim 2, it is characterised in that：It is provided with first clamping jaw and the second clamping jaw Antiskid glue cushion；
    Preferably, the wheel assembly includes the first directional wheel, the second directional wheel, the first universal wheel and the second universal wheel, and first Directional wheel and the second directional wheel are arranged at the front end of chassis, and the first universal wheel and the second universal wheel are arranged at the rear end of chassis.
  5. 5. piece-rate system according to claim 1, it is characterised in that：The processing unit includes the first mistake being sequentially connected Filter, vavuum pump, adsorption tower, lye tank and the second filter, first filter are connected with the outlet of first surge tank, the Tow filtrator is connected with the thermal medium entrance of the heat exchanger, and solid absorbent is filled with adsorption tower.
  6. 6. piece-rate system according to claim 5, it is characterised in that：The adsorption tower includes main adsorption tower and auxiliary is adsorbed Tower, main adsorption tower and auxiliary adsorption tower are in parallel.
  7. 7. piece-rate system according to claim 1, it is characterised in that：The power unit includes the first ball being sequentially connected Valve, pressure-reducing valve, the second surge tank, compressor and the second ball valve, the second ball valve are connected with steel cylinder.
  8. 8. piece-rate system according to claim 7, it is characterised in that：The first pressure is connected between first ball valve and pressure-reducing valve Power table；
    Preferably, the first safety valve is provided between the second surge tank and compressor；
    Preferably, the second safety valve is provided between the compressor and the second ball valve；
    Preferably, it is provided with second pressure gauge between second safety valve and the second ball valve.
  9. A kind of 9. separation method of sulfur hexafluoride and carbon tetrafluoride, it is characterised in that：Comprise the following steps：
    It is loaded with liquefaction SF6And CF4After the steel cylinder of gaseous mixture is reversed device clamping, it is promoted at setting height, reverses, make steel Liquid in bottle flows to buffer cell, through evaporator heating and gasifying, and after the first surge tank buffering is decompressed to 0.5-0.7MPa, Adsorption-edulcoration is carried out into processing unit, SF is carried out subsequently into cryogenic separation unit6And CF4Separation.
  10. 10. separation method according to claim 9, it is characterised in that：Temperature in cryogenic separation unit in low-temperature fractionating tower Spend for -80 DEG C；
    Preferably, the solid absorbent in processing unit is by F-03 molecular sieves, activated alumina, 5A molecular sieves and activated silica gel group Into；
    Still more preferably, the quality of F-03 molecular sieves in solid absorbent, activated alumina, 5A molecular sieves and activated silica gel It is equal.
CN201711191717.9A 2017-11-24 2017-11-24 A kind of piece-rate system and separation method of sulfur hexafluoride and carbon tetrafluoride Pending CN107715493A (en)

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CN114849414A (en) * 2022-04-19 2022-08-05 安徽新力电业科技咨询有限责任公司 Liquid SF for recovery 6 Method for cleaning a plant

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