CN116571056B - Sulfur hexafluoride gas recovery and purification device and method for GIS equipment - Google Patents
Sulfur hexafluoride gas recovery and purification device and method for GIS equipment Download PDFInfo
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- CN116571056B CN116571056B CN202310850228.9A CN202310850228A CN116571056B CN 116571056 B CN116571056 B CN 116571056B CN 202310850228 A CN202310850228 A CN 202310850228A CN 116571056 B CN116571056 B CN 116571056B
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- 229910018503 SF6 Inorganic materials 0.000 title claims abstract description 65
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 title claims abstract description 65
- 229960000909 sulfur hexafluoride Drugs 0.000 title claims abstract description 65
- 238000000746 purification Methods 0.000 title claims abstract description 42
- 238000011084 recovery Methods 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000001179 sorption measurement Methods 0.000 claims abstract description 48
- 239000003463 adsorbent Substances 0.000 claims abstract description 34
- 239000012535 impurity Substances 0.000 claims abstract description 22
- 238000001514 detection method Methods 0.000 claims description 23
- 238000004321 preservation Methods 0.000 claims description 17
- 238000009413 insulation Methods 0.000 claims description 12
- 238000001914 filtration Methods 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 10
- 238000004064 recycling Methods 0.000 claims description 10
- 239000002245 particle Substances 0.000 claims description 4
- 239000002994 raw material Substances 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 160
- 239000006096 absorbing agent Substances 0.000 description 7
- 238000000354 decomposition reaction Methods 0.000 description 7
- 230000008929 regeneration Effects 0.000 description 6
- 238000011069 regeneration method Methods 0.000 description 6
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- 238000003795 desorption Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 231100000331 toxic Toxicity 0.000 description 2
- 230000002588 toxic effect Effects 0.000 description 2
- 229920005830 Polyurethane Foam Polymers 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000011496 polyurethane foam Substances 0.000 description 1
Classifications
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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
-
- 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
- B01D53/30—Controlling by gas-analysis apparatus
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/30—Sulfur compounds
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- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Engineering & Computer Science (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Separation Of Gases By Adsorption (AREA)
Abstract
The invention provides a sulfur hexafluoride gas recovery and purification device of GIS equipment and a method thereof, belonging to the field of gas recovery, wherein the device comprises an air inlet pipeline, a first valve, a second valve, a pressure swing adsorber, a third valve, a filter, a detector, a fourth valve and an air outlet pipeline; the air inlet pipeline is connected with a second valve, the air outlet of the second valve is respectively connected with a plurality of pressure swing adsorbers, the pressure swing adsorbers are arranged in parallel, the outlet of the pressure swing adsorbers is connected with a third valve, the air outlet of the third valve is connected with a filter, the air outlet of the filter is connected with a detector, and the air outlet of the detector is connected with a fourth valve. According to the method, the impurity components in the sulfur hexafluoride in the raw material gas are adsorbed under pressure by a pressure swing adsorption principle, so that the recovery and purification of the sulfur hexafluoride gas are realized, and the adsorbed impurity components are desorbed by reducing the pressure of an adsorption bed, so that the adsorbent is regenerated.
Description
Technical Field
The invention belongs to the field of gas recovery, and particularly relates to a sulfur hexafluoride gas recovery and purification device and method for GIS equipment.
Background
The power system widely uses sulfur hexafluoride gas (SF 6) as an insulating arc extinguishing medium in electrical equipment. However, since the greenhouse effect is many times that of carbon dioxide, sulfur hexafluoride gas (SF 6) is a forbidden gas. When sulfur hexafluoride gas is used in electric equipment, the sulfur hexafluoride gas can decompose and produce toxic and even extremely toxic strong corrosion harmful impurities due to the action of high energy factors. Under certain conditions, it may lead to deterioration of electrical properties and even serious equipment accidents, and the decomposed low-fluoride is harmful to people and even endangers life. The annual usage amount of sulfur hexafluoride gas in the current power system reaches very large, and the annual usage amount of sulfur hexafluoride gas in the current power system is increasing at a certain speed. The existing in-service equipment in the power industry has the defects of not less gas storage, not more recyclable amount and more amount converted into carbon dioxide.
Therefore, it is necessary to recover and purify sulfur hexafluoride gas in sulfur hexafluoride electrical equipment and regenerate an adsorbent, and recharge the sulfur hexafluoride gas into a gas insulated metal enclosed switchgear (GIS) after meeting the quality requirements of sulfur hexafluoride gas specified by national standards.
The sulfur hexafluoride gas recycling system is an important means for realizing the random discharge and unified treatment and recycling of the gas recovered by sulfur hexafluoride equipment.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a sulfur hexafluoride gas recovery and purification device and a method thereof for GIS equipment, and the technical problem to be solved by the invention is how to realize recovery and purification of sulfur hexafluoride gas in GIS equipment and regeneration of adsorbent in the device.
In order to solve the technical problems, the invention provides a sulfur hexafluoride gas recovery and purification device of GIS equipment, which comprises an air inlet pipeline, a first valve, a second valve, a pressure swing adsorber, a third valve, a filter, a detector, a fourth valve and an air outlet pipeline;
the air inlet pipeline is connected with an air inlet of the first valve, an air outlet of the first valve is connected with the second valve, an air outlet of the second valve is respectively connected with a plurality of pressure swing adsorbers, the pressure swing adsorbers are arranged in parallel, outlets of the pressure swing adsorbers are respectively connected with the third valve, an air outlet of the third valve is connected with the filter, an air outlet of the filter is connected with the detector, an air outlet of the detector is connected with the fourth valve, and an air outlet of the fourth valve is respectively connected with the air outlet pipeline and the first valve;
the detector comprises a heating control unit, a gas flow control module, a detection air chamber, a computer, a display and an alarm system, wherein the heating control unit, the gas flow control module and the detection air chamber are connected through a gas guide pipe sequentially, the computer is electrically connected with the detection air chamber, and the computer is electrically connected with the display and the alarm system.
Further, a first gas flow control device is connected between the gas inlet pipeline and the first valve.
Further, the device comprises a first pressure swing absorber, a second pressure swing absorber and a third pressure swing absorber, wherein the first pressure swing absorber, the second pressure swing absorber and the third pressure swing absorber are arranged in parallel.
Further, the pressure swing adsorber comprises an air compressor and an adsorption tower, an air inlet of the air compressor is connected with the second valve, an air outlet of the air compressor is connected with an air inlet of the adsorption tower, and an air outlet of the adsorption tower is connected with the third valve.
Further, the inside of the adsorption tower is filled with an adsorbent.
Further, a plurality of groups of filter screens are arranged in the filter.
Further, the detection air chamber comprises a heat preservation and insulation layer, a heat preservation control unit is arranged inside the heat preservation and insulation layer, a cavity capable of containing gas is arranged inside the heat preservation and insulation layer, a temperature sensor is arranged inside the cavity and is electrically connected with the heat preservation and insulation control unit, a thermal conductivity sensor is arranged inside the cavity, and the thermal conductivity sensor is electrically connected with the machine.
Further, a second gas flow control device is connected between the gas outlet pipeline and the fourth valve.
Further, the second gas flow control device comprises a meter for reading the gas flow and the total sample injection amount.
The invention provides a method for recycling and purifying sulfur hexafluoride gas of GIS equipment, which utilizes the sulfur hexafluoride gas recycling and purifying device of the GIS equipment and comprises the following steps:
step S1: sulfur hexafluoride raw gas containing impurities enters a pressure swing adsorber through an air inlet pipeline, a first valve and a second valve;
step S2: the gas adsorbed by the pressure swing adsorber enters a filter after passing through a third valve;
step S3: after removing the adsorbent particles, the gas enters a detector for detection;
s4, after the detected gas passes through the fourth valve, the detected gas enters an air outlet pipeline or the first valve;
step S5: the pressure of the pressure swing adsorber is changed to desorb impurity components, so that the regeneration of the adsorbent is realized.
Further, in the step S3, the detector heats the purified gas, the temperature sensor in the detector measures the temperature of the gas, and when the temperature of the gas reaches the set temperature, the detector controls the flow rate of the gas in the gas guide tube, the gas is introduced into the detection air chamber of the detector, and the heat conductivity is used for measuring the purity of the sulfur hexafluoride gas.
Further, in the step S4, if the gas meets the purification result, the gas flows into the gas outlet pipeline through the fourth valve for recycling; if the gas does not meet the purification result, the gas flows into the first valve through the fourth valve to be subjected to secondary adsorption and filtration, and if the secondary gas still does not meet the requirement, the detector gives an alarm to prompt the replacement of the adsorbent.
According to the sulfur hexafluoride gas recovery and purification device for the GIS equipment, impurity gas components such as sulfur hexafluoride decomposition products in raw material gas are pressurized and adsorbed by a pressure swing adsorption principle, so that impurity gas separation of a gas mixture is realized, and then the adsorbed impurity components such as the sulfur hexafluoride decomposition products are desorbed and desorbed by reducing the pressure of an adsorption bed, so that an adsorbent is regenerated.
According to the sulfur hexafluoride gas recovery and purification method for the GIS equipment, disclosed by the invention, the sulfur hexafluoride gas is purified by a pressure swing adsorption principle, and the adsorbent is regenerated by changing the pressure of the adsorption bed.
The invention provides a basis for economically and adaptively solving the problems of power equipment and environmental safety caused by purity reduction due to sulfur hexafluoride gas decomposition in the prior GIS equipment; the device can realize vehicle-mounted, is convenient to move, does not need to construct a factory building, and can save a large amount of land fund; the device automatically controls the circulation treatment, and has the advantages of short recovery time, high recovery utilization rate, convenient operation, safety and reliability. The device also comprises a performance test detection system, has perfect functions and high automation degree, and calculates the recovery amount and recovery rate accurately.
Drawings
Fig. 1 is a schematic structural diagram of a sulfur hexafluoride gas recovery and purification device for GIS equipment.
Fig. 2 is a schematic diagram of a detector structure of a sulfur hexafluoride gas recovery and purification device for GIS equipment.
Fig. 3 is a schematic diagram of a detecting air chamber structure of a sulfur hexafluoride gas recovery and purification device for GIS equipment.
1, an air inlet pipeline; 2. a first gas flow control device; 3. a first valve; 4. a second valve; 5. a first pressure swing adsorber; 6. a second pressure swing adsorber; 7. A third pressure swing adsorber; 8. a third valve; 9. A filter; 10. a detector; 11. a fourth valve; 12. a second gas flow control device; 13. an air outlet pipeline; 101. a heating control unit; 102. a gas flow control module; 103. detecting an air chamber; 104. a computer; 105. a display and an alarm system; 1031. a heat preservation and insulation layer; 1032. a heat preservation control unit; 1033. a temperature sensor; 1034. a thermal conductivity sensor.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, based on the embodiments of the invention, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the invention.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, based on the embodiments of the invention, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the invention.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the sulfur hexafluoride gas recovery and purification device and method for GIS equipment according to the present invention can be understood by those skilled in the art according to specific circumstances.
Example 1:
as shown in fig. 1, a first embodiment of the present invention provides a sulfur hexafluoride gas recovery and purification device of a GIS device, which includes an air inlet pipeline 1, a first valve 3, a second valve 4, a pressure swing adsorber, a third valve 8, a filter 9, a detector 10, a fourth valve 11 and an air outlet pipeline 13;
the air inlet pipeline 1 is connected with the air inlet of the first valve 3, the air outlet of the first valve 3 is connected with the second valve 4, the air outlet of the second valve 4 is respectively connected with a plurality of pressure swing adsorbers, the pressure swing adsorbers are arranged in parallel, the outlets of the pressure swing adsorbers are respectively connected with the third valve 8, the air outlet of the third valve 8 is connected with the filter 9, the air outlet of the filter 9 is connected with the detector 10, the air outlet of the detector 10 is connected with the fourth valve 11, and the air outlet of the fourth valve 11 is respectively connected with the first valve 3 and the air outlet pipeline 13.
Example 2:
as shown in fig. 1, a second embodiment of the present invention provides a sulfur hexafluoride gas recovery and purification device of a GIS device, which includes an air inlet pipeline 1, a first valve 3, a second valve 4, a pressure swing adsorber, a third valve 8, a filter 9, a detector 10, a fourth valve 11 and an air outlet pipeline 13;
the air inlet pipeline 1 is connected with the air inlet of the first valve 3, the air outlet of the first valve 3 is connected with the second valve 4, the air outlet of the second valve 4 is respectively connected with a plurality of pressure swing adsorbers, the pressure swing adsorbers are arranged in parallel, the outlets of the pressure swing adsorbers are respectively connected with the third valve 8, the air outlet of the third valve 8 is connected with the filter 9, the air outlet of the filter 9 is connected with the detector 10, the air outlet of the detector 10 is connected with the fourth valve 11, and the air outlet of the fourth valve 11 is respectively connected with the first valve 3 and the air outlet pipeline 13.
The present embodiment is different from the first embodiment in that:
a first gas flow control device 2 is connected between the air inlet pipeline 1 and the first valve 3, the first gas flow control device 2 comprises an instrument for reading gas flow and total sample injection amount, the instrument is used for calculating recovery rate, and the first gas flow control device 2 is connected to GIS equipment; when air is required to be taken in, the air outlet of the GIS equipment is connected with the air inlet of the recovery and purification device by an air taking pipe.
The pressure swing adsorbers have vacuumizing adsorption and depressurization desorption functions and comprise a first pressure swing adsorber 5, a second pressure swing adsorber 6 and a third pressure swing adsorber 7, wherein the first pressure swing adsorbers 5, the second pressure swing adsorbers 6 and the third pressure swing adsorbers 7 are arranged in parallel.
The pressure swing adsorber adopts a pressure swing adsorption principle, the filler is sulfur hexafluoride gas adsorbent, and the separation of impurity gas of a gas mixture and the regeneration of the adsorbent are realized by utilizing the adsorption selectivity of the adsorbent to the gas, namely the difference of adsorption amounts of different gases (adsorbents) on the adsorbent and the characteristic that the adsorption amount of a specific gas on the adsorbent changes along with the change of pressure. According to the pressure swing adsorption technology, under the condition of selective adsorption of the adsorbent, impurity gas components such as sulfur hexafluoride decomposition products in the raw material gas are pressurized and adsorbed, so that the impurity gas separation of a gas mixture is realized, and then the adsorbed impurity components such as sulfur hexafluoride decomposition products are desorbed and desorbed by reducing the pressure of an adsorption bed, so that the adsorbent is regenerated.
The pressure swing adsorber comprises an air compressor and an adsorption tower, wherein the air compressor is directly connected with the adsorption tower through an air duct, and the air compressor is in front. The air compressor is used to regulate the pressure in the adsorption column. Adsorption principle: the working modes of pressure adsorption and pressure reduction desorption are adopted, and the adsorption separation and purification of sulfur hexafluoride gas impurities are realized through the periodical change of pressure by utilizing the difference of the adsorption capacities of the adsorbents on target molecules under different pressures. The pressure of the adsorption tower is increased during adsorption, and the pressure of the adsorption tower is reduced during regeneration and desorption.
The adsorption tower layer adopts an axial single-bed structure, and sulfur hexafluoride gas adsorbent is filled in the adsorption tower layer.
Each pressure swing adsorber is subjected to adsorption and regeneration stages in the actual process. For each pressure swing adsorber, the adsorption process is intermittent, so that a plurality of pressure swing adsorbers are adopted for parallel circulation operation, the purpose of continuously preparing sulfur hexafluoride clean gas is achieved, and the gas purification recovery efficiency is improved. Each pressure swing adsorber is connected with the air inlet pipeline 1, the filter 9 and the detector 10, so that the automatic opening and closing of the passage is realized in the cyclic operation of the pressure swing adsorber, and after the adsorption process of each pressure swing adsorber is finished, whether secondary filtration or alarm for replacing the adsorbent is needed is detected and analyzed.
The filter 9 is provided with a plurality of groups of filter screens for filtering particulate impurities such as adsorbents and the like in the gas.
The detector 10: the gas passes through the filter 9 and enters the detector 10 for analysis, and the result is presented. If the gas meets the purification result, the gas flows into the gas outlet pipeline 13 through the fourth valve 11; if the gas does not meet the purification result, the gas flows into the first valve 3 through the fourth valve 11 to be subjected to secondary adsorption and filtration, and if the secondary adsorption and filtration still do not meet the requirements, the detector 10 gives an alarm to prompt the replacement of the adsorbent.
As shown in fig. 2 and 3, the detector 10 includes a heating control unit 101, a gas flow control module 102, a detection gas chamber 103, a computer 104, and a display and alarm system 105, wherein the heating control unit 101, the gas flow control module 102, and the detection gas chamber 103 are connected through a gas duct in this order, the computer 104 is electrically connected to the detection gas chamber 103, and the computer 104 is electrically connected to the display and alarm system 105.
The detection air chamber 103 comprises a heat preservation and insulation layer 1031, a heat preservation control unit 1032 is arranged inside the heat preservation and insulation layer 1031, a cavity capable of containing air is arranged inside the heat preservation and insulation layer 1031, a temperature sensor 1033 is arranged inside the cavity, the temperature sensor 1033 is electrically connected with the heat preservation and insulation control unit 1032, a thermal conductivity sensor 1034 is arranged inside the cavity, and the thermal conductivity sensor 1034 is electrically connected with the computer 104.
The detector 10 is provided with a heating control unit 101 (ceramic heating plate) in front, when the gas temperature reaches 60 ℃, the flow rate of the gas in the gas guide pipe is controlled by a gas flow control module 102, the gas is introduced into a detection gas chamber 103 containing a thermal conductivity sensor 1034 (detection value), and the purity of the sulfur hexafluoride gas is measured by using the thermal conductivity. The detection air chamber 103 is provided with a heat-insulating control unit 1032 (heating wire), a heat-insulating layer 1031 (polyurethane foam), and a temperature sensor 1033 (for judging whether or not the temperature reaches 60 degrees, and judging whether or not the heat-insulating control unit 1032 is activated). The detector 10 is equipped with a computer 104 and a display and alarm system 105, calculates the gas purity by means of a built-in algorithm and displays it on the display, and if the purity does not reach the standard, an instrument alarm program is started to prompt the replacement of the adsorbent of the pressure swing adsorber.
A second gas flow control device 12 is connected between the gas outlet pipeline 13 and the fourth valve 11, and the second gas flow control device 12 comprises an instrument for reading the gas flow and the total sample injection amount and is used for calculating the recovery rate.
The working process of the gas recovery device in this embodiment is as follows:
when the device is used for taking gas for purification, GIS equipment is connected with one end of a gas taking pipe, and then the other end of the gas taking pipe is connected with an air inlet pipeline 1;
the gas taking pipe capable of directly taking gas from the GIS equipment is a detachable hose, and is connected with the GIS equipment when recovery and purification are needed and can be detached when not needed. One end of the gas taking pipe is connected with GIS equipment, and the other end of the gas taking pipe is connected with a gas inlet pipeline or a gas outlet pipeline of the device.
Introducing sulfur hexafluoride raw gas containing impurities into a pressure swing adsorber through an air inlet pipeline 1, a first gas flow control device 2, a first valve 3 and a second valve 4, pressurizing and adsorbing impurity gas components such as sulfur hexafluoride decomposition products in the raw gas by the pressure swing adsorber to separate the impurity gas of a gas mixture, and then desorbing and desorbing the impurity components such as the adsorbed sulfur hexafluoride decomposition products by reducing the pressure of an adsorption bed to regenerate the adsorbent;
the gas adsorbed by the pressure swing adsorber enters a filter 9 through a third valve 8, adsorbent particles are removed, the gas enters a detector 10 for detection, and if the gas accords with the purification result, the gas flows into an air outlet pipeline 13 through a fourth valve 11 for recycling; if the gas does not meet the purification result, the gas flows into the first valve 3 through the fourth valve 11 to be subjected to secondary adsorption and filtration, and if the secondary adsorption and filtration still do not meet the requirements, the detector 10 gives an alarm to prompt the replacement of the adsorbent.
When the device is used for recharging gas to the GIS equipment, the gas outlet pipeline is connected with one end of the gas taking pipe, the other end of the gas taking pipe is connected with the GIS equipment, and the gas enters the GIS equipment through the gas outlet pipeline 13 for recycling.
Example 3:
as shown in fig. 1, the invention provides a method for recycling and purifying sulfur hexafluoride gas of a GIS device, which comprises the following steps:
step S1: sulfur hexafluoride raw gas containing impurities enters a pressure swing adsorber through an air inlet pipeline 1, a first gas flow control device 2, a first valve 3 and a second valve 4;
step S2: the gas absorbed by the pressure swing absorber enters a filter 9 after passing through a third valve 8;
step S3: after removing the adsorbent particles, the gas enters a detector 10 for detection;
step S4, after the detected gas passes through the fourth valve 11, the detected gas enters the gas outlet pipeline 13 or the first valve 3;
step S5: the pressure of the pressure swing adsorber is changed to desorb impurity components, so that the regeneration of the adsorbent is realized.
In the step S3, the detector 10 heats the purified gas, the temperature sensor 1033 in the detector 10 measures the temperature of the gas, when the temperature of the gas reaches 60 degrees, the detector 10 controls the flow rate of the gas in the gas guide tube, the gas is introduced into the detection air chamber 103 of the detector 10, and the purity of the sulfur hexafluoride gas is measured by using the thermal conductivity.
In the step S4, if the gas meets the purification result, the gas flows into the gas outlet pipeline 13 through the fourth valve 11 for recycling; if the gas does not meet the purification result, the gas flows into the first valve 3 through the fourth valve 11 to be subjected to secondary adsorption and filtration, and if the secondary adsorption and filtration still do not meet the requirements, the detector 10 gives an alarm to prompt the replacement of the adsorbent.
According to the sulfur hexafluoride gas recovery and purification method for the GIS equipment, disclosed by the invention, the sulfur hexafluoride gas is purified by a pressure swing adsorption principle, and the adsorbent is regenerated by changing the pressure of the adsorption bed.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.
Claims (9)
1. The sulfur hexafluoride gas recovery and purification device of the GIS equipment is characterized by comprising an air inlet pipeline, a first valve, a second valve, a pressure swing adsorber, a third valve, a filter, a detector, a fourth valve and an air outlet pipeline; the air inlet pipeline is connected with an air inlet of the first valve, an air outlet of the first valve is connected with the second valve, an air outlet of the second valve is respectively connected with a plurality of pressure swing adsorbers, the pressure swing adsorbers are arranged in parallel, outlets of the pressure swing adsorbers are respectively connected with the third valve, an air outlet of the third valve is connected with the filter, an air outlet of the filter is connected with the detector, an air outlet of the detector is connected with the fourth valve, and an air outlet of the fourth valve is respectively connected with the air outlet pipeline and the first valve;
the detector comprises a heating control unit, a gas flow control module, a detection air chamber, a computer, a display and an alarm system, wherein the heating control unit, the gas flow control module and the detection air chamber are connected through a gas guide pipe in sequence, the computer is electrically connected with the detection air chamber, and the computer is electrically connected with the display and the alarm system;
the device utilizes a GIS equipment sulfur hexafluoride gas recovery and purification method to recover and purify sulfur hexafluoride gas, and comprises the following steps:
step S1: sulfur hexafluoride raw gas containing impurities enters a pressure swing adsorber through an air inlet pipeline, a first valve and a second valve;
step S2: the gas adsorbed by the pressure swing adsorber enters a filter after passing through a third valve;
step S3: after removing the adsorbent particles, the gas enters a detector for detection;
s4, after the detected gas passes through the fourth valve, the detected gas enters an air outlet pipeline or the first valve;
step S5: the pressure of the pressure swing adsorber is changed, and impurity components are desorbed and desorbed, so that the adsorbent is regenerated;
in the step S3, the detector heats the purified gas, the temperature sensor in the detector measures the temperature of the gas, when the temperature of the gas reaches the set temperature, the detector controls the flow rate of the gas in the gas guide pipe, the gas is introduced into the detection air chamber of the detector, and the heat conductivity is used for measuring the purity of the sulfur hexafluoride gas;
in the step S4, if the gas meets the purification result, the gas flows into the gas outlet pipeline through the fourth valve for recycling; if the gas does not meet the purification result, the gas flows into the first valve through the fourth valve to be subjected to secondary adsorption and filtration, and if the secondary gas still does not meet the requirement, the detector gives an alarm to prompt the replacement of the adsorbent.
2. The sulfur hexafluoride gas recovery and purification device of the GIS equipment according to claim 1, wherein a first gas flow control device is connected between the gas inlet pipeline and the first valve.
3. The sulfur hexafluoride gas recovery and purification device of a GIS device of claim 1, including a first pressure swing adsorber, a second pressure swing adsorber, and a third pressure swing adsorber, the first pressure swing adsorber, the second pressure swing adsorber, and the third pressure swing adsorber being disposed in parallel.
4. The sulfur hexafluoride gas recovery and purification device of the GIS equipment according to claim 1, wherein the pressure swing adsorber comprises an air compressor and an adsorption tower, an air inlet of the air compressor is connected with the second valve, an air outlet of the air compressor is connected with an air inlet of the adsorption tower, and an air outlet of the adsorption tower is connected with the third valve.
5. The GIS device sulfur hexafluoride gas recovery and purification apparatus according to claim 4, wherein an adsorbent is filled in the adsorption tower.
6. The sulfur hexafluoride gas recovery and purification device of the GIS equipment according to claim 1, wherein a plurality of groups of filter screens are arranged in the filter.
7. The sulfur hexafluoride gas recovery and purification device of GIS equipment according to claim 1, wherein the detection air chamber comprises a heat preservation and insulation layer, a heat preservation control unit is arranged inside the heat preservation and insulation layer, a cavity capable of containing gas is arranged inside the heat preservation and insulation layer, a temperature sensor is arranged inside the cavity and is electrically connected with the heat preservation control unit, a thermal conductivity sensor is arranged inside the cavity, and the thermal conductivity sensor is electrically connected with the machine.
8. The sulfur hexafluoride gas recovery and purification device of the GIS equipment according to claim 1, wherein a second gas flow control device is connected between the gas outlet pipeline and the fourth valve.
9. The GIS device sulfur hexafluoride gas recovery and purification apparatus of claim 1, wherein the second gas flow control device includes a meter for reading the gas flow and the total sample volume.
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