CN114210170A - Method and apparatus for recovering heavy gas - Google Patents
Method and apparatus for recovering heavy gas Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000000926 separation method Methods 0.000 claims abstract description 49
- 238000011084 recovery Methods 0.000 claims abstract description 20
- 238000010438 heat treatment Methods 0.000 claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 38
- 239000002274 desiccant Substances 0.000 claims description 23
- 239000007788 liquid Substances 0.000 claims description 19
- 239000000428 dust Substances 0.000 claims description 15
- 238000000746 purification Methods 0.000 claims description 14
- 238000001035 drying Methods 0.000 claims description 11
- 238000001179 sorption measurement Methods 0.000 claims description 8
- 230000007613 environmental effect Effects 0.000 claims description 7
- 238000001914 filtration Methods 0.000 claims description 7
- 239000012535 impurity Substances 0.000 abstract description 9
- 239000007789 gas Substances 0.000 description 301
- 229910018503 SF6 Inorganic materials 0.000 description 22
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 description 10
- 230000000694 effects Effects 0.000 description 9
- 229960000909 sulfur hexafluoride Drugs 0.000 description 7
- 239000002245 particle Substances 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 238000000354 decomposition reaction Methods 0.000 description 5
- 230000010287 polarization Effects 0.000 description 5
- 231100000331 toxic Toxicity 0.000 description 5
- 230000002588 toxic effect Effects 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 239000003463 adsorbent Substances 0.000 description 4
- -1 firstly Substances 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000007791 dehumidification Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 150000002222 fluorine compounds Chemical class 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 150000001247 metal acetylides Chemical class 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000007096 poisonous effect Effects 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 150000003568 thioethers Chemical class 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
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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
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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
- B01D53/26—Drying gases or vapours
- B01D53/261—Drying gases or vapours by adsorption
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B17/00—Sulfur; Compounds thereof
- C01B17/45—Compounds containing sulfur and halogen, with or without oxygen
- C01B17/4507—Compounds containing sulfur and halogen, with or without oxygen containing sulfur and halogen only
- C01B17/4515—Compounds containing sulfur and halogen, with or without oxygen containing sulfur and halogen only containing sulfur and fluorine only
- C01B17/453—Sulfur hexafluoride
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2210/00—Purification or separation of specific gases
- C01B2210/0001—Separation or purification processing
- C01B2210/0009—Physical processing
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2210/00—Purification or separation of specific gases
- C01B2210/0001—Separation or purification processing
- C01B2210/0009—Physical processing
- C01B2210/0014—Physical processing by adsorption in solids
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Abstract
The application provides a recovery method and a recovery device of heavy gas, wherein the method comprises the following steps: recovering air in the leaked space to obtain gas to be treated, wherein the gas to be treated comprises leaked heavy gas; purifying the gas to be treated to obtain purified gas; heating and pressurizing the purified gas to obtain gas to be separated; and carrying out gas separation on the gas to be separated to obtain heavy gas. According to the method, the recovered gas to be treated is purified to remove impurities, then is heated and pressurized, and then is subjected to gas separation to obtain the heavy gas, so that the gas separation condition can be ensured, and the gas separation efficiency can be ensured, thereby improving the quality of the recovered heavy gas and solving the problem of poor quality of the recovered heavy gas in the prior art.
Description
Technical Field
The application relates to the field of gas recovery, in particular to a recovery method and a recovery device of heavy gas.
Background
SF6When an electrical apparatus fails to perform an internal discharge, many of sulfides, fluorides, carbides, and fluorosulfides are decomposed. Once sulfur hexafluoride electrical equipment fails, a large amount of sulfur hexafluoride gas leaks, and toxic and harmful gas in the sulfur hexafluoride gas fills the equipment interval. SF6When the gas leakage early warning recovery system carries out emergency recovery work, gas and air leaked in a leakage interval can be simultaneously recovered, the components of moisture, dust and toxic gas in the recovered gas are more, the impurities are required to be pretreated, and SF (sulfur hexafluoride) is used for treating the impurities6When gas and air are separated, the pressure, temperature and flow of the recovered gas are all required, so that the gas conveyed at normal pressure must be pressurized and heated to meet the requirements of SF6And air separation requirements are met, and the gas separation effect is guaranteed.
The above information disclosed in this background section is only for enhancement of understanding of the background of the technology described herein and, therefore, certain information may be included in the background that does not form the prior art that is already known in this country to a person of ordinary skill in the art.
Disclosure of Invention
The present application mainly aims to provide a method and an apparatus for recovering heavy gas, so as to solve the problem of poor quality of the heavy gas recovered in the prior art.
In order to achieve the above object, according to one aspect of the present application, there is provided a method for recovering a heavy gas, comprising: recovering air in the leaked space to obtain gas to be treated, wherein the gas to be treated comprises leaked heavy gas; purifying the gas to be treated to obtain purified gas; heating and pressurizing the purified gas to obtain gas to be separated; and carrying out gas separation on the gas to be separated to obtain heavy gas.
Optionally, recovering air from the space where the leakage occurs to obtain the gas to be treated, comprising: calculating leakage concentration according to environmental space parameters and the mass of the leaked heavy gas, wherein the leakage concentration is the concentration of the heavy gas in the air of a space with leakage under a standard condition; calculating a gas delivery rate from the leak concentration, the gas delivery rate being a minimum recovery rate that reduces the leak concentration to a predetermined concentration within a predetermined time; and controlling a gas conveying device to recover air in the leaked space according to the gas conveying rate to obtain the gas to be treated.
Optionally, performing a purification treatment on the gas to be treated to obtain a purified gas, including: filtering the gas to be treated to obtain a first gas, wherein the dust content of the first gas is lower than a first preset content; dehumidifying the first gas to obtain a second gas, wherein the liquid water content of the second gas is lower than a second preset content; carrying out harmful gas purification treatment on the second gas to obtain a third gas, wherein the content of harmful gas in the third gas is lower than a third preset content; and drying the third gas to obtain the purified gas, wherein the water vapor content of the purified gas is lower than a fourth preset content.
Optionally, drying the third gas to obtain the purge gas, includes: calculating the amount of desiccant based on the moisture content of the third gas; and drying the third gas by adopting a drying agent with a preset mass to obtain the purified gas, wherein the preset mass is larger than the using amount of the drying agent.
Optionally, calculating the desiccant amount based on the moisture content of the third gas comprises: calculating the water content of the third gas according to the gas delivery rate, the predetermined time and the water content of the air under the current environmental condition; and calculating the amount of the desiccant according to the water content of the third gas and the adsorption efficiency of the desiccant.
According to another aspect of the present application, there is provided a heavy gas recovery apparatus comprising: the gas conveying equipment is used for recovering air in a leaked space to obtain gas to be treated, and the gas to be treated comprises leaked heavy gas; the purification equipment is used for purifying the gas to be treated to obtain purified gas; the heating and pressurizing equipment is used for heating and pressurizing the purified gas to obtain gas to be separated; and the gas separation equipment is used for carrying out gas separation on the gas to be separated to obtain heavy gas.
According to another aspect of the present application, there is provided a depth detection method, including: emitting modulated light; adjusting the modulated light to polarized light having a predetermined polarization direction; imaging according to incident reflected light to form a two-dimensional image, wherein the reflected light is the polarized light reflected by the measured object; dividing the two-dimensional image into a first part and a second part according to the ratio of the light intensity of the reflected light in a first polarization direction to the light intensity in a second polarization direction, and calculating the depth of the measured object according to one of the first part and the second part, wherein the first polarization direction is different from the second polarization direction.
By applying the technical scheme of the application, in the method for recovering the heavy gas, firstly, air in a leaked space is recovered to obtain the gas to be treated, wherein the gas to be treated comprises the leaked heavy gas; then, purifying the gas to be treated to obtain purified gas; then, heating and pressurizing the purified gas to obtain gas to be separated; and finally, carrying out gas separation on the gas to be separated to obtain heavy gas. According to the method, the recovered gas to be treated is purified to remove impurities, then is heated and pressurized, and then is subjected to gas separation to obtain the heavy gas, so that the gas separation condition can be ensured, and the gas separation efficiency can be ensured, thereby improving the quality of the recovered heavy gas and solving the problem of poor quality of the recovered heavy gas in the prior art.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application. In the drawings:
FIG. 1 shows a flow diagram of a heavy gas recovery process according to the present application;
fig. 2 shows a flow chart of the harmful gas purification process and the drying process according to the present application.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It will be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" another element, it can be directly on the other element or intervening elements may also be present. Also, in the specification and claims, when an element is described as being "connected" to another element, the element may be "directly connected" to the other element or "connected" to the other element through a third element.
As mentioned in the background art, the quality of the heavy gas recovered in the prior art is poor, and in order to solve the above technical problems, the present application provides a method and an apparatus for recovering a heavy gas.
In an embodiment of the present application, there is provided a method for recovering heavy gas, as shown in fig. 1, the method comprising:
s101, recovering air in a leaked space to obtain gas to be treated, wherein the gas to be treated comprises leaked heavy gas;
step S102, purifying the gas to be processed to obtain purified gas;
step S103, heating and pressurizing the purified gas to obtain gas to be separated;
and step S104, carrying out gas separation on the gas to be separated to obtain heavy gas.
In the method for recovering heavy gas, firstly, air in a leaked space is recovered to obtain gas to be treated, wherein the gas to be treated comprises the leaked heavy gas; then, purifying the gas to be treated to obtain purified gas; then, heating and pressurizing the purified gas to obtain gas to be separated; and finally, carrying out gas separation on the gas to be separated to obtain heavy gas. According to the method, the recovered gas to be treated is purified to remove impurities, then is heated and pressurized, and then is subjected to gas separation to obtain the heavy gas, so that the gas separation condition can be ensured, and the gas separation efficiency can be ensured, thereby improving the quality of the recovered heavy gas and solving the problem of poor quality of the recovered heavy gas in the prior art.
In one embodiment of the present application, the air in the space where the leakage occurs is recovered to obtain the gas to be treated, including: calculating leakage concentration according to environmental space parameters and the mass of the leaked heavy gas, wherein the leakage concentration is the concentration of the heavy gas in the air of a space with leakage under a standard condition; calculating a gas delivery rate based on said leak concentration, said gas delivery rate being a minimum recovery rate that reduces said leak concentration to a predetermined concentration within a predetermined time; and controlling the gas conveying equipment to recover air in the leaked space according to the gas conveying rate to obtain the gas to be treated. Specifically, gas conveying mainly conveys gas in a leakage space at normal pressure through a large-flow vortex gas pump, and the gas conveying rate influences the emergency treatment efficiency of the whole heavy gas leakage early warning and recovery system, so that the selection of gas conveying equipment is very important, the gas conveying equipment selected by the calculated gas conveying rate can ensure that the leaked gas is recovered and completed within preset time, and the personal safety and the environmental safety of workers are guaranteed.
More specifically, with heavy gas SF6For example, according to 1 SF6The calculation process of calculating the recovery rate when the electrical equipment leaks is as follows: according to the sulfur hexafluoride three-state table, the SF can be found out6Density under pressure P in electrical equipment, so from the bulk density weight formula SF can be calculated6SF in electrical equipment6Volume of gas
M is SF6Total amount of gas in the electrical apparatus, ρ being SF6Gas density in electrical equipment, gas leakage is considered to fill the entire gas cell, assuming the gas leakage rate is ignored, the meterCalculating the post-leakage SF under the standard condition6Concentration of internal leakage between electrical devices
Wherein P is SF after leakage6SF in electrical equipment room6V is the volume in the main transformer room, V1Is SF6Volume of electrical apparatus, PSign boardCalculating the concentration of sulfur hexafluoride (126992.128ppm) resulting from the failure as the standard atmospheric pressure; the time required to reduce to 1000ppm (W0) is T; s is the gas delivery rate; rho0Density of sulfur hexafluoride gas at normal pressure (20 ℃, 101.325 kPa): 6.16kg/m 3. Ideally, the recovered SF is maintained according to mass conservation6Gas and residual SF6The sum of the gases being equal to SF6SF in electrical equipment6Gas, the following formula can be obtained:
the gas transport rate can be obtained from the above formula
The user can calculate the gas delivery rate S from the above equation based on the specified time T and can then select the corresponding delivery gas pump based on the rate S.
In an embodiment of the present application, the purifying the gas to be processed to obtain a purified gas includes: filtering the gas to be treated to obtain a first gas, wherein the dust content of the first gas is lower than a first preset content; dehumidifying the first gas to obtain a second gas, wherein the liquid water content of the second gas is lower than a second preset content; carrying out harmful gas purification treatment on the second gas to obtain a third gas, wherein the content of the harmful gas in the third gas is lower than a third preset content; and drying the third gas to obtain the purified gas, wherein the water vapor content of the purified gas is lower than a fourth preset content. Specifically, the gas to be treated is subjected to a filtering treatment, a dehumidifying treatment, a harmful gas purifying treatment and a drying treatment to remove impurities, thereby further ensuring the quality of the recovered heavy gas.
Specifically, in the operation process of the electrical equipment, as 90% -95% of dust particles floating in the air are positively or negatively charged due to the charge property of the dust particles, the dust is easily condensed and settled around the electrical equipment, and the insulation performance of the electrical equipment is damaged. And because a certain amount of liquid water is generated due to temperature and pressure changes in the gas conveying process, the water absorption of the dust depends on the conditions of the components, the size, the charge state, the temperature, the gas pressure and the like of the dust, some dust forms water-insoluble hard scale after absorbing water, the hard scale can cause blockage to influence the operation of equipment, and the particle size of the dust in the gas is definitely specified to be not higher than 1 mu m in relevant regulations, so that a filter is arranged at the gas conveying inlet end, the gas to be treated is filtered to obtain a first gas, and the dust content of the first gas is lower than a first preset content so as to avoid the harm of the dust.
Specifically, because the air is conveyed and part of water in the air is changed into liquid water along with the change of the temperature and the pressure of the gas, if the liquid water is accumulated for a long time, the safe use of the electrical equipment is influenced, the adsorption effect of toxic and harmful gases is also influenced due to the high-humidity environment, and the SF in the recovered gas is utilized6More decomposition products, SF6Partial decomposition products react with water to produce strong acid, and the strong acid has strong corrosivity and can corrode partial equipment members to influence the safe and normal operation of the equipment, so that the first gas is subjected to dehumidification treatment to obtain a second gas, the liquid water content of the second gas is lower than a second preset content, and the operation safety of electrical equipment can be improved.
It should be noted that, those skilled in the art can select a suitable water-gas separation method according to actual situations, and according to different water-gas separation methods, the types of the water-gas separators used in the compressed air include: baffle type separator, filtering type separator, cyclone separator and vortex separator. Baffle separators are one type of inertial separator that consists of a plurality of baffles in a louvered configuration. The baffle material has good infiltration effect on liquid water drops, most of liquid drops are attached to the baffle after colliding with the baffle, a thin layer of liquid is generated on the surface of the liquid drops and then is left along the baffle, larger-particle liquid drops are accumulated at the edge of the baffle, and the liquid drops are separated from air under the action of gravity of the liquid drops; the filtering type gas-water separator can achieve a good separation effect, and the filtering efficiency of the filter on water drops with certain particle sizes can reach 100%. But the pressure loss is large when the filter is separated, and the work of maintaining and replacing the filter element is complicated and the cost is large, so the filter is not considered; the vortex separator is also called a hydraulic separator and is composed of a centrifugal pump, a vortex pipe, a valve, a pressure gauge, a water tank, a slag discharge tank and the like, is mainly used for solid-liquid separation occasions, and is not suitable for separating gas phase and liquid phase in the project; the cyclone separator is also an inertial separator, and the principle of the inertial separator is that compressed air enters the separator along the tangential direction of a cylinder wall and rotates inside, liquid drops mixed in the air also rotate along with the separator and generate centrifugal force, the centrifugal force generated by the liquid drops with large mass is large, and the large liquid drops move to the outer wall under the action of the centrifugal force, collide with the outer wall and then are accumulated and separated from the air; the liquid drops with smaller particle size migrate to the central axis in a negative pressure state under the action of gas pressure, and the separator has the advantage that the separation efficiency is higher when the rated treatment capacity is achieved, so that the cyclone separator is selected when the treatment gas amount is fixed, and the high-efficiency separation efficiency is achieved.
In an embodiment of the present application, the drying the third gas to obtain the purified gas includes: calculating the amount of desiccant based on the moisture content of the third gas; and drying the third gas by adopting a drying agent with a preset mass to obtain the purified gas, wherein the preset mass is larger than the using amount of the drying agent. Specifically, most of the recovered gas is air, the water content in the air is high, liquid-phase water is removed after gas-water separation, and still part of water exists in the mixed gas in a gaseous state, and the adsorption effect of the part of the adsorbent for treating the toxic and harmful gas is weakened under the action of high humidity, so that the humidity treatment in the mixed gas is ensured to meet the requirement of the toxic and harmful gas adsorbent. If the gaseous water in the gas is removed, the amount of the desiccant must be ensured.
In one embodiment of the present application, calculating the desiccant usage based on the moisture content of the third gas comprises: calculating the water content of the third gas according to the gas delivery rate, the predetermined time and the water content of the air under the current environmental condition; and calculating the amount of the desiccant according to the water content of the third gas and the adsorption efficiency of the desiccant. Specifically, since the moisture content in the air varies with the temperature and the pressure, the water content Wg/kg dry air and the density ρ of the dry air at a specific temperature and pressure can be known by looking at the "saturated humid air content at different pressures and temperatures" table11.29kg/M3, a gas recovery rate S, a recovery time T, and a water content M of the third gasWater (W)＝Wρ1ST, according to the adsorption efficiency N of the selected drying agent, the dosage M of the drying agentSuction device＝N·MWater (W)Of course, in order to ensure the effect of water treatment in the actual process, the theoretical value should be multiplied by a safety factor, as the case may be.
It should be noted that, in order to ensure the effect of post-stage treatment of poisonous and harmful gas by the desiccant, as shown in FIG. 2, SF is used6For example, the gas is first filtered to remove water by adsorption with a desiccant and then passed through SF6The decomposition product adsorbent removes toxic and harmful gases in the mixed gas, and finally the gas passes through the particulate filter, so that dust brought out when the gas passes through the adsorbent is prevented from entering a pipeline of a post-stage device, and the particulate filter is additionally arranged at the position.
In an embodiment of the present application, there is also provided a heavy gas recovery apparatus, including:
the gas conveying equipment is used for recovering air in a leaked space to obtain gas to be treated, and the gas to be treated comprises leaked heavy gas;
the purification equipment is used for purifying the gas to be treated to obtain purified gas;
the heating and pressurizing equipment is used for heating and pressurizing the purified gas to obtain gas to be separated;
and the gas separation equipment is used for carrying out gas separation on the gas to be separated to obtain heavy gas.
In the heavy gas recovery device, a gas conveying device recovers air in a leaked space to obtain a gas to be treated, wherein the gas to be treated comprises the leaked heavy gas; the purification equipment carries out purification treatment on the gas to be treated to obtain purified gas; heating and pressurizing the purified gas by a heating and pressurizing device to obtain gas to be separated; and the gas separation equipment performs gas separation on the gas to be separated to obtain heavy gas. The device carries out purification treatment through the pending gas of retrieving, gets rid of impurity, later heats the gas separation again after the pressurization treatment, obtains heavy gas, can guarantee the gas separation condition, ensures gas separation efficiency to improve the quality of the heavy gas of retrieving, solved the poor problem of quality of the heavy gas of retrieving among the prior art.
It should be noted that, the above-mentioned gas conveying equipment is large-traffic vortex air pump, and its exit-inlet pressure difference only has 2 ~ 3KPa, can't satisfy the gas processing requirement of back-stage equipment, take SF6 gas as an example, in order to ensure the working property of gas separation module in the gaseous early warning system that leaks of SF6, must provide suitable gas working condition, reach certain pressure and temperature promptly, consequently the effect at this working module is that carry out pressure boost and heating to gas through scroll compressor and constant temperature heating module, guarantee the gas separation condition, ensure gas separation efficiency.
It should be noted that, the above-mentioned heavy gas recovery device not only can satisfy the gas transportation rate, but also can satisfy the requirements of the gas separation equipment of the latter stage on the separation of the mixed gas, and it is more to use the mechanical cyclone separator and the adsorption filter to complete the treatment of the moisture, dust and decomposition products in the mixed gas, the moisture treatment reaches the equipment use requirements, and the decomposition products treatment satisfies the quality requirements of the SF6 gas.
From the above description, it can be seen that the above-described embodiments of the present application achieve the following technical effects:
1) in the method for recovering heavy gas, firstly, air in a space with leakage is recovered to obtain gas to be treated, wherein the gas to be treated comprises the leaked heavy gas; then, purifying the gas to be treated to obtain purified gas; then, heating and pressurizing the purified gas to obtain gas to be separated; and finally, carrying out gas separation on the gas to be separated to obtain heavy gas. According to the method, the recovered gas to be treated is purified to remove impurities, then is heated and pressurized, and then is subjected to gas separation to obtain the heavy gas, so that the gas separation condition can be ensured, and the gas separation efficiency can be ensured, thereby improving the quality of the recovered heavy gas and solving the problem of poor quality of the recovered heavy gas in the prior art.
2) In the recovery device of heavy gas, the gas conveying equipment recovers air in a space with leakage to obtain gas to be treated, wherein the gas to be treated comprises the leaked heavy gas; the purification equipment carries out purification treatment on the gas to be treated to obtain purified gas; heating and pressurizing the purified gas by a heating and pressurizing device to obtain gas to be separated; and the gas separation equipment performs gas separation on the gas to be separated to obtain heavy gas. The device carries out purification treatment through the pending gas of retrieving, gets rid of impurity, later heats the gas separation again after the pressurization treatment, obtains heavy gas, can guarantee the gas separation condition, ensures gas separation efficiency to improve the quality of the heavy gas of retrieving, solved the poor problem of quality of the heavy gas of retrieving among the prior art.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (6)
1. A method for recovering heavy gas, comprising:
recovering air in the leaked space to obtain gas to be treated, wherein the gas to be treated comprises leaked heavy gas;
purifying the gas to be treated to obtain purified gas;
heating and pressurizing the purified gas to obtain gas to be separated;
and carrying out gas separation on the gas to be separated to obtain heavy gas.
2. The method of claim 1, wherein recovering air from the space where the leak occurs to obtain the gas to be treated comprises:
calculating leakage concentration according to environmental space parameters and the mass of the leaked heavy gas, wherein the leakage concentration is the concentration of the heavy gas in the air of a space with leakage under a standard condition;
calculating a gas delivery rate from the leak concentration, the gas delivery rate being a minimum recovery rate that reduces the leak concentration to a predetermined concentration within a predetermined time;
and controlling a gas conveying device to recover air in the leaked space according to the gas conveying rate to obtain the gas to be treated.
3. The method of claim 2, wherein the purifying the gas to be processed to obtain a purified gas comprises:
filtering the gas to be treated to obtain a first gas, wherein the dust content of the first gas is lower than a first preset content;
dehumidifying the first gas to obtain a second gas, wherein the liquid water content of the second gas is lower than a second preset content;
carrying out harmful gas purification treatment on the second gas to obtain a third gas, wherein the content of harmful gas in the third gas is lower than a third preset content;
and drying the third gas to obtain the purified gas, wherein the water vapor content of the purified gas is lower than a fourth preset content.
4. The method of claim 3, wherein drying the third gas to obtain the purified gas comprises:
calculating the amount of desiccant based on the moisture content of the third gas;
and drying the third gas by adopting a drying agent with a preset mass to obtain the purified gas, wherein the preset mass is larger than the using amount of the drying agent.
5. The method of claim 4, wherein calculating the desiccant usage based on the moisture content of the third gas comprises:
calculating the water content of the third gas according to the gas delivery rate, the predetermined time and the water content of the air under the current environmental condition;
and calculating the amount of the desiccant according to the water content of the third gas and the adsorption efficiency of the desiccant.
6. An apparatus for recovering heavy gas, comprising:
the gas conveying equipment is used for recovering air in a leaked space to obtain gas to be treated, and the gas to be treated comprises leaked heavy gas;
the purification equipment is used for purifying the gas to be treated to obtain purified gas;
the heating and pressurizing equipment is used for heating and pressurizing the purified gas to obtain gas to be separated;
and the gas separation equipment is used for carrying out gas separation on the gas to be separated to obtain heavy gas.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01227036A (en) * | 1988-03-05 | 1989-09-11 | Takasago Thermal Eng Co Ltd | Method and apparatus for measuring leakage rate of airtight vessel |
| JP2002328065A (en) * | 2001-05-01 | 2002-11-15 | Toshiba Corp | Environment monitoring apparatus |
| KR20170124124A (en) * | 2016-04-29 | 2017-11-10 | 중앙대학교 산학협력단 | Gas leak concentration prediction method generated in the confined spaces |
| 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 |
| US10386258B1 (en) * | 2015-04-30 | 2019-08-20 | Picarro Inc. | Systems and methods for detecting changes in emission rates of gas leaks in ensembles |
| US20200292376A1 (en) * | 2019-03-14 | 2020-09-17 | Citic Dicastal Co., Ltd. | Device and method for detecting leak rate of leak |
-
2021
- 2021-11-08 CN CN202111316461.6A patent/CN114210170A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01227036A (en) * | 1988-03-05 | 1989-09-11 | Takasago Thermal Eng Co Ltd | Method and apparatus for measuring leakage rate of airtight vessel |
| JP2002328065A (en) * | 2001-05-01 | 2002-11-15 | Toshiba Corp | Environment monitoring apparatus |
| US10386258B1 (en) * | 2015-04-30 | 2019-08-20 | Picarro Inc. | Systems and methods for detecting changes in emission rates of gas leaks in ensembles |
| KR20170124124A (en) * | 2016-04-29 | 2017-11-10 | 중앙대학교 산학협력단 | Gas leak concentration prediction method generated in the confined spaces |
| 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 |
| US20200292376A1 (en) * | 2019-03-14 | 2020-09-17 | Citic Dicastal Co., Ltd. | Device and method for detecting leak rate of leak |
Non-Patent Citations (2)
| Title |
|---|
| 杜建科: "毒气泄漏过程及其危险区域分析", 中国安全科学学报, no. 06 * |
| 陈平;石磊;赵建勇;刘弘景;于希娟;: "气体变电站故障泄漏预警回收技术研究与应用", 高压电器, no. 12, pages 244 - 248 * |
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