CN1243022A - Method for recovering condensed gas from mixed gas, and recovering apparatus thereof - Google Patents
Method for recovering condensed gas from mixed gas, and recovering apparatus thereof Download PDFInfo
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- CN1243022A CN1243022A CN98126562A CN98126562A CN1243022A CN 1243022 A CN1243022 A CN 1243022A CN 98126562 A CN98126562 A CN 98126562A CN 98126562 A CN98126562 A CN 98126562A CN 1243022 A CN1243022 A CN 1243022A
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Abstract
A method for recovering a condensable gas from a mixed gas uses a condensable gas recovering apparatus. The apparatus comprises a compressor for compressing a mixed gas comprising a condensable gas and an incondensable gas, a mixed gas separator including a cooler and an adsorbent that adsorbs the incondensable gas, and a vacuum exhauster. The method comprises the steps of introducing the mixed gas highly compressed by the compressor into the mixed gas separator, liquefying and recovering the condensable gas by cooling the mixed gas separator with the cooler while the adsorbent adsorbs the incondensable gas contained in the mixed gas in a high pressure state, and exhausting the incondensable gas from the adsorbent in a low pressure state where the gas in the mixed gas separator has been exhausted by the vacuum exhauster. Therefore, recovery of the condensable gas is carried out with high reliability, and mixing of a large quantity of the condensable gas into the incondensable gas is easily prevented.
Description
The present invention relates to adopt condensing gas retracting device that the mist with condensing gas and on-condensable gas composition reclaimed, from mist, reclaim the recovery method of condensing gas and be used for the condensing gas retracting device of this method, for example promptly relate to from be used for electrical equipment as the nitrogen of electric insulation gas and sulfur hexafluoride (below be called SF
6) in the mist of gas as the nitrogen of on-condensable gas with as the SF of condensing gas
6The condensing gas retracting device that separates, reclaims the method for condensing gas and be used for this recovery.
In being arranged at the gas insulated apparatus such as gas insulation opening and closing arrangement of power equipment, enclose the SF that has as insulating gas
6The condensing gas of gas etc., but when the maintenance electrical equipment, must open this gas insulated apparatus.At this moment, from economy and the viewpoint that prevents global warming, just require to enclose SF in device
6Condensing gas such as gas are reclaimed and are not discharged in atmosphere.
Corresponding with this requirement, for example in 1993 No. 78718 communique of Japanese patent of invention bulletin, proposed a kind ofly to be used for SF with recovery
6Condensing gas Deng insulating gas is the gas displacement retracting device of purpose.Figure 13 represents the system diagram of this gas displacement retracting device.Among the figure, the 1301st, insulating gas liquefaction displacement retracting device has gasifier 1313, drier 1307, gas compressor 1308, oil eliminator 1309, aerial cooler 1310, blast pipe 1312 and connector 1305,1306.And connector the 1305, the 1306th connects container 1302 described later and the member with gas liquefaction displacement retracting device 1301 usefulness by upper port 1303 and lower ports 1304.
Described container 1302 is meant for example outer packaging container of the employed insulated switchgear device of power equipment.
And in the occasion of these container 1302 filling condensing gas or in case open the occasion of container, this insulating gas liquefaction displacement retracting device 1301 is used for the condensing gas in the container is reclaimed and do not discharge to atmosphere.Therefore, existing explanation simply uses insulating gas liquefaction displacement retracting device 1301 air displacement in the container 1302 to be become the SF of requirement
6Gas is again with unnecessary SF
6The method that reclaims.
At first, the SF outside illustrating
6The gas bomb SF that will liquefy
6SF should liquefy for importing insulating gas liquefaction displacement retracting device 1301 inside, usefulness gasifier 1313
6Gasification, decompression, thereby the SF after the gasification
6Gas imports in the container 1302 by connector 1306, lower ports 1304.
In case SF
6Import in the container 1302, just stay in the container 1302 earlier, mix with air and be mist, enter in the insulating gas liquefaction displacement retracting device 1301 by upper port 1303, connector 1305 as on-condensable gas.
Import mist in the insulating gas liquefaction displacement retracting device 1301 after,, arrive cooling separator 1311 through the intermediate treatment of gas compressor reducer 1308, oil eliminator 1309 and aerial cooler 1310 with drier 1307 bone dries.
Here, in case cooling and mixing gas, SF
6Gas is just than air liquefaction earlier.Therefore, with the SF after this liquefaction
6Reclaim, and with remaining air and the SF that do not liquefy
6The mist of gas is discharged to the atmosphere from blast pipe 1312.And the SF after the liquefaction
6Gasify again and deliver to container 1302.If repeat this work, with the SF of requirement
6Gas filling is in container, and the displacement operation just finishes.In addition, only reclaiming SF
6The occasion of gas, the SF after the also recyclable liquefaction
6
Like this, in this insulating gas liquefaction displacement retracting device 1301, just replace, or depend on that the using method difference also can carry out the recovery of insulating gas by the above-mentioned liquefaction of carrying out insulating gas like that.But in this insulating gas liquefaction displacement retracting device, though will be for example by the on-condensable gas and the SF of air etc.
6The mist that the condensing gas of gas etc. is formed is cooled off, yet the condensing gas of evaporating pressure part still is mixed in the on-condensable gas under the chilling temperature state, in case it is discharged in atmosphere as emission gases, then condensing gas is also discharged in atmosphere, thereby not only influences economy but also influence environment.
At this moment, if the insulating gas of handling only is pure condensing gas, though in atmosphere, discharge through above-mentioned processing, condensing gas only trace is sneaked in the on-condensable gas, and its absolute magnitude is less, problem still is slight, but insulating gas is the occasion of mist from the beginning, when the big mist of ratio of shared condensing gas is handled in the ratio mist to on-condensable gas shared in the mist, because the airborne release amount of condensing gas is also bigger, so this problem just can not be ignored.
In addition, do not arrange the viewpoint to atmosphere from reclaiming condensing gas, Japanese patent of invention discloses a kind of SF that has proposed following structure in 1997 No. 285719 communique
6The reclaiming device of gas and the portable regenerating unit that reclaims: the on-condensable gas at the inside of air insulating device trace that produce or that sneak in the gas displacement process all is adsorbed on the sorbing material, thereby the condensing gas of having removed on-condensable gas can be reclaimed.
The technical pattern that the document discloses will comprise the SF of on-condensable gas as shown in figure 14 slightly
6Gas imports in the liquefaction vessel 1404 through the 1st air contactor 1402 with compressor 1401 compression, at the inner filling of the 1st air contactor 1402 synthetic zeolite 1403 is arranged, by making SF
6The on-condensable gas absorption of nitrogen that is comprised or oxygen etc. removes on-condensable gas on it, reclaims pure SF
6
Technology as described above is effectively under the situation of absolute magnitude at trace of on-condensable gas, but resembles mist, when the ratio of on-condensable gas obviously greater than SF
6Just can not be suitable for during the ratio of gas, so above-mentioned technology exists this shortcoming.
In view of the above problems, the objective of the invention is, provide a kind of from for example by electric insulation gas used nitrogen and SF
6Reclaim SF in the mist of gas composition
6Gas, can from the mist that condensing gas and on-condensable gas are formed, reclaim the recovery method of condensing gas and be used for the retracting device of this recovery method.
For achieving the above object, the recovery method that from mist, reclaims condensing gas of technical scheme 1 of the present invention, be the recovery method that adopts the condensing gas retracting device, reclaims condensing gas from mist, the condensing gas retracting device has at least: the mist by condensing gas and on-condensable gas composition is given compressor for compressing; Filling is adsorbed the sorbing material of on-condensable gas and is possessed the mist separator of cooling device; Vacuum pumping hardware is characterized in, has at least: will be imported the 1st operation of described mist separator by the described mist of described compressor high-pressure trend; Make on-condensable gas absorption in the described mist on described sorbing material and the 2nd operation that described condensing gas is liquefied and reclaims by described mist separator being cooled off at high pressure conditions with described cooling device; Under with the low-pressure state of described vacuum pumping hardware after, from the described sorbing material that has adsorbed on-condensable gas with the internal gas exhaust of described mist separator with the 3rd operation of the on-condensable gas degassing.
In addition, the recovery method that from mist, reclaims condensing gas of technical scheme 2, be to adopt the recovery method condensing gas retracting device, reclaim condensing gas from mist, the condensing gas retracting device has at least: the mist by condensing gas and on-condensable gas composition is given compressor for compressing; The sorbing material of filling absorption on-condensable gas also possesses cooling device and the mist separator of heater; Vacuum pumping hardware is characterized in, has at least: will be imported the 1st operation of described mist separator by the described mist of described compressor high-pressure trend; Make on-condensable gas absorption in the described mist on described sorbing material and the 2nd operation that described condensing gas is liquefied and reclaims by described mist separator being cooled off at high pressure conditions with described cooling device; Under with the low-pressure state of described vacuum pumping hardware after, by the described sorbing material that has adsorbed on-condensable gas being heated with described heater with the internal gas exhaust of described mist separator from the described sorbing material with the 3rd operation of the on-condensable gas degassing.
Here, the recovery method that reclaims condensing gas from mist of technical scheme 3 is, in the described recovery method that from mist, reclaims condensing gas as technical scheme 1, best example is, employing is provided with the described condensing gas retracting device of a pair of described mist separator, described mist separator is when carrying out described the 2nd operation, and another described mist separator carries out described the 3rd operation.
In addition, the recovery method that reclaims condensing gas from mist of technical scheme 4 is, in the described recovery method that from mist, reclaims condensing gas as technical scheme 1, employing is embedded in described condensing gas retracting device in the described sorbing material with described cooling device, the recovery method that reclaims condensing gas from mist of technical scheme 5 is, in the described recovery method that from mist, reclaims condensing gas as technical scheme 1, employing is configured in described sorbing material on the top of described mist separator inside, described cooling device is configured in the described sorbing material below of described mist separator inside, and the described condensing gas retracting device that in described sorbing material, also disposes, the recovery method that reclaims condensing gas from mist of technical scheme 6 is, in the described recovery method that from mist, reclaims condensing gas as technical scheme 1, best example is to adopt the top that described sorbing material is configured in described mist separator inside, described cooling device is configured in the described condensing gas retracting device of the described sorbing material below of described mist separator inside.
The recovery method that reclaims condensing gas from mist of technical scheme 7 is, in the described method that from mist, reclaims condensing gas as technical scheme 1, its characteristics are that the columnar described mist separator that employing is made closed at both ends with container shapes is configured to the described condensing gas retracting device that its major axis is an approximate horizontal.
The recovery method that reclaims condensing gas from mist of technical scheme 8 is, in the described method that from mist, reclaims condensing gas as technical scheme 1, best example is, to adopt the columnar described mist separator that container shapes is made closed at both ends to be configured to its major axis be approximate horizontal, will traverse at the described condensing gas retracting device of one or more thermal conductor axial arrangement on described sorbing material and the described cooling device on described mist separator.
The recovery method that reclaims condensing gas from mist of technical scheme 9 is, as technical scheme 1 described from mist in the recovery method of recovery condensing gas, described condensing gas is sulfur hexafluoride (SF
6) gas, any in Freon gas or the hydrocarbon gas, in addition, the recovery method that reclaims condensing gas from mist of technical scheme 10 is, in the described recovery method that from mist, reclaims condensing gas as technical scheme 1, described on-condensable gas is nitrogen or airborne any, in addition, the recovery method that reclaims condensing gas from mist of technical scheme 11 is, in the described recovery method that from mist, reclaims condensing gas as technical scheme 1, best example is that described sorbing material is the aluminosilicate that comprises calcium.
The recovery method that reclaims condensing gas from mist of technical scheme 12 is in the recovery method of recovery condensing gas, to be characterized in that described condensing gas is the electrical equipment condensing gas in as technical scheme 1 described mist.
The characteristics of the condensing gas retracting device of technical scheme 13 are to have at least: the mist that condensing gas and on-condensable gas are formed gives compressor for compressing; Filling is adsorbed the sorbing material of on-condensable gas and is possessed the mist separator of cooling device; Vacuum pumping hardware.
Fig. 1 is the overall structure figure of condensing gas retracting device.
Fig. 2 is the general configuration figure of mist separator.
Fig. 3 is the roughly cutaway view of the long axis direction of mist separator.
Fig. 4 is the roughly cutaway view along A-A line among Fig. 3.
Fig. 5 is the condensing gas in the expression mist separator and the view of on-condensable gas flow situation.
Fig. 6 is about SF
6The curve map of saturated vapour pressure force curve.
Fig. 7 is expression with the curve map that concerns between the adsorbance of the nitrogen of adsorbent and the pressure.
Fig. 8 is about thermal regeneration and pressure reproduction ratio curve map.
Fig. 9 is the roughly cutaway view of long axis direction of the mist separator of the 2nd example.
Figure 10 is the roughly cutaway view along B-B line among Fig. 9.
Figure 11 is the roughly cutaway view of long axis direction of the mist separator of the 3rd example.
Figure 12 is the roughly cutaway view of short-axis direction of the mist separator of other example.
Figure 13 is the overall structure figure of existing gas displacement retracting device.
Figure 14 is the general configuration figure of other gas concentration unit.
Below, with regard to example of the present invention in conjunction with the accompanying drawings.The example here is an example after all, might not be limited to this example.In addition, in the following description, condensing gas is meant as SF
6The hydrocarbon gas of gas and Freon gas or propane flammable gas and so on etc. such, in the temperature range of general refrigeration machine, the gas of condensation liquefaction when promptly pressure is located at the 30 atmospheric pressure left and right sides the scope from 30 ℃ to-30 ℃, on-condensable gas be meant as nitrogen and air etc., uncondensable gas under these conditions.And, in the following description, condensing gas is made as SF
6, on-condensable gas is made as nitrogen, but statement in advance, and the present invention is not only limited to the mist that these gases and these gas are formed.
Example 1
In the 1st example, just use have compressor, filling sorbing material and possess the mist separator of cooling device and the condensing gas retracting device of vacuum pumping hardware from describing by the recovery method that reclaims condensing gas the mist of condensing gas and on-condensable gas composition (below be called " mist "), before this, with reference to accompanying drawing the condensing gas retracting device that is used for this recovery method is described earlier.
Fig. 1 is the overall structure figure of condensing gas retracting device 100 that is used for reclaiming from mist the recovery method of condensing gas of the present invention, Fig. 2 is the general configuration figure that expression constitutes the mist separator 200 of condensing gas retracting device 100, Fig. 3 is the roughly cutaway view of the long axis direction of mist separator 200, and Fig. 4 is the roughly cutaway view along A-A line among Fig. 3.
Condensing gas retracting device 100 shown in Figure 1 has: gas insulated apparatus 101; Accumulator 102; Gas compressor 103; Cooler 104, a pair of mist separator 200a, 200b, switching valve 105,106,114 and a valve 109,110; Reservoir 107; Branched pipe 108a, 108b; Pipe arrangement 111,112a, 112b206a, 206b and gas concentration meter 113.
In addition, mist separator 200 shown in Figure 2 is and mist separator 200a shown in Figure 1, the same device of 200b that it has forbay 201, adsorption layer 202, coil pipe 203, gas cooler 204 and pipe arrangement 205,206.207 is vacuum pumping hardwares among the figure.Consider the designs simplification of mist separator 200, can omit coil pipe 203, but, preferably set in advance this coil pipe 203 from reason described later.
And in this example, the shape of this mist separator 200 is made the cylindric of closed at both ends as shown in Figures 3 and 4.For its shape, not necessarily to be defined in this shape, but as described later,, be preferably made cylindric in order to liquefy, reclaim condensing gas and ability easily in the high pressure that imports to inner mist.
Now in conjunction with the accompanying drawings with regard to the structure of this condensing gas retracting device 100.
Gas insulated apparatus 101 is the devices that are used for electrical equipment as gas insulation opening and closing arrangement etc., portion within it, be provided with the electrical equipment (not shown) corresponding to required purpose, and be filled with mist, this electrical equipment turns round with this mist under the state that keeps electric insulation.
Gas insulated apparatus 101 is connected with gas compressor 103 by accumulator 102.The discharge side of gas compressor 103 is connected with a cooler 104, is connected with mist separator 200 1 sides that are made of a pair of mist separator 200a and 200b by switching valve 105 then.
Be extended with pipe arrangement 206a, 206b from the bottom of mist separator 200a, 200b, described pipe arrangement is connected with reservoir 107 with switching valve 106 interflow.In addition, from pipe arrangement 206a, 206b branch branched pipe 108a, 108b are arranged, branched pipe 108a, 108b are connected with valve 110.
Valve 109 and 110 is connected with the accumulator 102 of the suction side that is configured in gas compressor 103 by pipe arrangement 111.
Shown in Fig. 4,5, adsorption layer 202 is configured to fan-shaped on the top of forbay 201 inside of mist separator 200, and gas cooler 204 is configured to fan-shaped below adsorption layer 202.And, in order to do heat-transfer pipe 209 that for example flows through cold-producing medium and heat-exchange surface greatlyyer, gas cooler 204 and fan-shaped heat transfer sheet 210 thermally coupleds.This heat transfer sheet 210 also may not need, but preferably sets in advance for improving cooling effectiveness.
At the sorbing materials such as zeolite that adsorb nitrogen selectively that are filled with on the adsorption layer 202 as putting down in writing on the Japanese mechanics meeting will 1998.1 Vol.101 No.950 p37.That is,, can enumerate the aluminosilicate of expressing with following chemical formula as this sorbing material.
xM
(2/n)O·Al
2O
3·ySiO
2·zH
2O
(M: calcium metal or calcium great soil group metal)
Even for obtaining also can improve the zeolite of the characterization of adsorption selectively of nitrogen inside, preferably M is a calcium constituent in above-mentioned chemical formula.
In addition, this sorbing material here is the material that adopts selective absorption nitrogen, is adapted to but also can adopt certainly.Constitute the material of the on-condensable gas of mist.
In addition, a pair of mist separator 200 is set here, but needn't be defined in this number, for example, can be provided with more than 1 and 3.
Secondly, adopt and have as mentioned above that the condensing gas retracting device 100 of structure reclaims SF from mist
6Gas.This recovery method comprises 3 following operations.That is: will import the 1st operation of the mist separator 200 of condensing gas retracting device 100 through the mist of high-pressure trend; Make the nitrogen adsorption in the mist on sorbing material and by mist separator 200 being cooled off to liquefy, reclaim SF with high pressure conditions with cooling device
6The 2nd operation of gas; Under with the low-pressure state of described vacuum pumping hardware 207 after, from the sorbing material that has adsorbed nitrogen with the internal gas exhaust in the mist separator 200 with the 3rd operation of the nitrogen degassing.
Below, illustrate adopt this condensing gas retracting device 100 from mist, reclaim SF
6The recovery method of gas.
Be filled in the mist of gas insulated apparatus 101 inside, at first become gases at high pressure by gas compressor 103 attractions, compression by accumulator 102.The mist that becomes gases at high pressure then is sent a cooler 104 and cools off.Secondly, operation switching valve 105 is sent among a pair of mist separator 200a, the 200b any one with the gases at high pressure that are cooled.Here, the gases at high pressure with cooling are sent to mist separator 200a.
Continue the 1st above-mentioned operation, and carry out the 2nd operation of following explanation.
The nitrogen of sending in the mist of high pressure conditions of mist separator 200a is adsorbed on the adsorption layer 202 selectively.At this moment, in mist separator 200a, by nitrogen adsorption is removed from mist on adsorption layer 202, the SF in the mist then
6The concentration of gas increases.
Become the SF of high concentration
6Gas is because of SF
6The proportion of gas is more great than the ratio of nitrogen, so shown in arrow A among Fig. 5, begin to be deposited in the bottom of forbay 201 by its deadweight, but in this process, become the SF of high concentration
6Gas is by being configured in the gas cooler 204 of adsorption layer 202 belows.
And as shown in Figure 3, on gas cooler 204, be connected with for example device of refrigeration machine 208 grades, utilize cold-producing medium to cool off the SF that is passed through by its supply
6Gas.Therefore, run into the SF of gas cooler 204
6Gas is cooled absorption latent heat and liquefies, and accumulates in the bottom of forbay 201 as liquid.And the SF after the liquefaction
6Flow in the pipe arrangement 206a that is located on forbay 201 bottoms, put aside gradually in reservoir 107 by switching valve 106.
SF about this HTHP
6The phenomenon of gas cooled, liquefaction is with reference to SF shown in Figure 6
6The curve map of saturation vapour pressure carry out simple declaration.When will be for example temperature be that 30 ℃, pressure are the SF of 30atm.abs state
6When under situation about still keep-uping pressure, lowering the temperature, SF as shown in the figure
6Also step-down of saturation vapour pressure.But, because pressure keeps high pressure, thus the amount of necessity is liquefied, so that SF
6The steam pressure of gas becomes saturation vapour pressure.
And remaining in nitrogen in the mist shown in arrow B among Fig. 5 in this stage, the adsorption layer that automatically moves in the forbay because of proportion abortion capture power is adsorbed on the sorbing material.Therefore, between adsorption layer and gas cooler, produce the Natural Circulation of gas.
Like this, the mist of handling is discharged from forbay 201 through pipe arrangement 206a.This discharge gas turns back to accumulator 102 through pipe arrangement 108a, switching valve 109, pipe arrangement 111 earlier.The discharge gas that turns back to accumulator 102 returns the 1st operation.Secondly, utilize the gas concentration meter 113 that is located on this path to monitor the SF that discharges in the gas
6Gas concentration, the SF in discharging gas
6When gas concentration became very low, shut off valve 109 with reducing pressure in 207 pairs of mist separators of vacuum pumping hardware 200a, thereby outgased to the nitrogen that is adsorbed in the adsorption layer.
In addition, as shown in Figures 3 and 4, in this example, for shortening the gas circulation mobile route effectively with further quickening circulation rate, its shape is made the cylindrical shape of closed at both ends, and adsorption layer 202 is fan-shaped configuration at an upper portion thereof in the cross section of mist separator 200a, and gas cooler 204 is configured in the below of adsorption layer 202.In addition, by the shape of mist separator 200 is made the cylindric of closed at both ends, can also stand to import the high pressure of inner mist.
In addition,, discharge from pipe arrangement 206 easily, also can dispose at tilt a little state in several years of long axis direction for making the condensing gas after the liquefaction though mist separator 200 is configured to level with its long axis direction.
In addition, why will flow through the fan-shaped heat transfer sheet thermally coupled of the heat-transfer pipe of cold-producing medium and gas cooler and constitute big heat-exchange surface, be for prevent with gas cooler 204 in the mist contact portion reduced the cause of transmitting heat because of the gas circulation of free convection.
More than be the content of the 2nd operation, in the method, be basically, generally by making the discharge gas circulation repeat the 1st operation and the 2nd operation, to SF
6Liquefy, reclaim, and SF
6Under the state that gas is removed from mist it is discharged.
But when repeating the 2nd operation, the nitrogen adsorption ability of adsorption layer 202 is just saturated soon, therefore, when becoming so state, carries out the 3rd operation.
In the 3rd operation, nitrogen adsorption ability to adsorption layer 202 is recovered, specifically, operation switching valve 105,106 and valve 109 are after sealing mist separator 200a, discharge with the internal gas of vacuum pumping hardware 207, make it to become low-pressure state mist separator 200a.Like this, nitrogen is from adsorption layer 202 degassings, to the outside drain of mist separator 200a.
Now come this phenomenon of simple declaration in conjunction with Fig. 7.Nitrogen adsorption amount with sorbing material depends on pressure, for example the nitrogen adsorption amount of the every 1kg of sorbing material is 12N1/kg when pressure is made as 500P/torr, but when this pressure dropped to 100P/torr, the nitrogen adsorption amount of the every 1kg of sorbing material dropped to about 3N1/kg.That is, as long as pressure descends, the above nitrogen of adsorbable amount that surpasses of sorbing material just automatically outgases from sorbing material.And when the degassing end of job, when pressure returns original value, owing to adsorbable amount increases again, so the adsorption capacity of sorbing material is recovered once more.
Like this, in case regeneration adsorption layer 202 just can utilize this mist separator 200a once more in the 2nd operation.
Here, such as previously described, by from supplying with thermal medium, also can promote the degassing of nitrogen with adsorption layer 202 hot linked coil pipes 203.Therefore, preferably set in advance coil pipe 203.
For this phenomenon, now describe in conjunction with curve map shown in Figure 8.As previous explanation, be set as by temperature pressure changed, then nitrogen can be outgased (A-B among the figure), and when pressure keep necessarily, when sorbing material is high temperature, because the amount of the adsorbable nitrogen of sorbing material still reduces, so still to nitrogen outgas (A-C).Therefore, coil pipe 203 is set just can heats sorbing material, and when sorbing material is heated into high temperature, if with 200 decompressions of mist separator, then once can outgas to more nitrogen.(A-D among the figure).
In addition, in this example on the used condensing gas retracting device, as discussed previouslyly be provided with a pair of mist separator 200, reclaim efficiency of operation to improve.
Now specify this point.At first, 200a carries out the 2nd operation with the mist separator, if repeat this operation, then as discussed previously such, the adsorption capacity of adsorption layer 202 just is saturation state soon.In case and the adsorption capacity of adsorption layer 202 is saturation state, then, enter into the 3rd operation still as previous described, in case carry out the 3rd operation, during this, mist separator 200a becomes SF
6The state that operation can not be carried out is entirely reclaimed in the liquefaction of gas.
Therefore, mist separator 200a is in during the 3rd operation, if operation switching valve 105 imports mist mist separator 200b and carries out the 2nd operation simultaneously with this mist separator 200b, even then mist separator 200a is in out of use state, also available described condensing gas retracting device 100 is all the time to SF
6Gas liquefies, reclaims.
That is to say, because of it can guarantee the continuity of operation, so a pair of mist separator 200 preferably is set.
So, adopt the gas concentration unit of the present invention's the 1st example, the mist separator 200 that adsorption layer 202 by supplying with heat supply and gas cooler 204 etc. are formed is made a pair of structure, nitrogen and SF
6The mist of gas separates fully, forms the environment of low temperature and high pressure with SF in a side absorber
6The gas recovery of liquefying, the environment that forms high temperature and low pressure simultaneously in the opposing party's absorber outgases nitrogen and discharges in atmosphere, even the gas insulated apparatus of mist etc. is used in maintenance as insulating gas, also can still suitably keep SF
6The discharge rate of gas is fully handled mist.
Example 2
In the 1st above-mentioned example, just from mist to SF
6Liquefy method that reclaims and the condensing gas retracting device 100 that is used for this recovery is illustrated, but in order to reclaim SF more expeditiously
6Gas can be considered the mist separator 200 of condensing gas retracting device 100 is made other shape.Therefore, in the 2nd example, the mist separator 200 of just making other shape illustrates in conjunction with the accompanying drawings.
The shape of the mist separator 200 in the 1st example of previous narration be shown in Fig. 3,4 like that, and the absorption of using the nitrogen of this mist separator 200 also is as previously discussed such, is the structure of utilizing the Natural Circulation of the mist that is produced between adsorption layer 202 and gas cooler 204.
That is, the Natural Circulation of the mist between above-mentioned adsorption layer 202 and the gas cooler 2204 is to utilize the difference in specific gravity of mixed gas composition.A side wherein, in general, than great, proportion was little when temperature was high when gas temperature was low.Therefore, referring to the structure of the mist separator 200 shown in Fig. 3,4, because the nitrogen that is adsorbed on the adsorption layer 202 is higher temperatures, so along with adsorption layer 202 these nitrogen of absorption, adsorption layer 202 more becomes the condition of high temperature because of the absorption heat.Like this, because of the environment around the adsorption layer 202 is a high temperature, around adsorption layer 202, be difficult to rise, thereby just accumulate in the below in the mist separator 200 so import the mist of the HTHP of mist separator 200 again.
That is to say that the nitrogen that should float is low temperature, the SF that should descend
6Gas is high temperature, and difference in specific gravity further diminishes and the starting power of mist generation Natural Circulation is reduced, SF
6The organic efficiency of gas just reduces.
For preventing this phenomenon, if make as far as possible in the mist separator 200 temperature environment evenly.
Fig. 9 be exactly with solve the mist separator 200 that above-mentioned shortcoming is a purpose ' the roughly cutaway view of long axis direction, Figure 10 is the roughly cutaway view along B-B line among Fig. 9.
This mist separator 200 ' characteristics be, from gas cooler 204 to mist separator 200 ' long axis direction at certain intervals heat transfer plate 211 is configured in the top whole adsorption layer 202 on.About the shape of this heat transfer plate 211, can consider different shape, even for make temperature environment as far as possible, preferably heat transfer plate 211 is made the shape that is absorbed in adsorption layer 202 inside.Importantly, by at certain intervals with gas cooler 204 and adsorption layer 202 thermally coupleds, with mist separator 200 ' cross section see, make temperature up and down evenly make temperature indifference up and down, thereby prevent to cause that because of the phenomenon of difference in specific gravity the Natural Circulation starting power of mist reduces.
This mist separator 200 ' other member and the 1st example in narrate identical.That is, have forbay 201, adsorption layer 202, gas cooler 204, pipe arrangement 205,206 and vacuum pumping hardware 207.Here, having omitted coil pipe 203, but had or not this coil pipe, also is as illustrating in the 1st example.In addition, this mist separator 200 ' structure also basically as illustrating in the 1st example, only increased the heat transfer plate 211 of previous narration.
By formation mist separator 200 like this ', the Natural Circulation of starting mixture body more effectively, thus can further reclaim SF effectively
6Gas.
Example 3
Formerly in Xu Shu the 2nd example, by from gas cooler 204 to mist separator 200 ' long axis direction thermally coupled at certain intervals, make mist separator 200 ' the temperature up and down seen of cross section evenly do not have temperature contrast, to prevent to reduce the starting power of the Natural Circulation of starting mixture body because of the phenomenon of difference in specific gravity, but in this 3rd example, as shown in figure 11, on adsorption layer 202 independently and mist separator 200 ' long axis direction dispose heat transfer plate 212 at certain intervals, simultaneously the 2nd heat-transfer pipe 209a is configured in the inside of adsorption layer 202, again with the 2nd heat-transfer pipe 209a and heat transfer plate 212 thermally coupleds, by with series connection or side by side mode the heat-transfer pipe 209 of gas cooler 204 is connected with refrigeration machine 208, then compare with the 2nd example, can make more reliably mist separator 200 ' the temperature up and down seen of cross section evenly and prevent that the minimizing of the difference in specific gravity that causes because of temperature contrast from reducing the starting power of gas circulation.
In addition, the formation mist separator 200 shown in this 3rd example ' basic member, be forbay 201, adsorption layer 202, gas cooler 204, pipe arrangement 205,206, vacuum pumping hardware 207 and structure thereof, identical with shown in the 1st example still.For having or not coil pipe 203 also is identical.
Other is about mixing other separator 200, as shown in figure 12, can consider in the bottom of adsorption layer at the axial arrangement trapezoidal shape of cylindrical shell or the not shown rectangle or the cooler of wedge shape.In addition, the shape of the forbay 201 of mist separator 200 is made the cylindrical shape of closed at both ends, but but also in addition shape.And in the recovery method of condensing gas of the present invention, because forbay 201 inside are high pressure, so the cylindrical shape of being preferably made.
1 described employing has at least compressor, filling sorbing material and possesses cooling device such as technical scheme The mist separator and the condensing gas retracting device of vacuum pumping hardware carry out from mist The middle method that reclaims condensing gas is owing to be conceived to consist of condensing gas and the on-condensable of mist The difference in specific gravity of gas makes on-condensable gas in the high pressure conditions mist still to keep high pressure conditions to inhale Be attached on the sorbing material and still keep simultaneously high pressure conditions with cooling device to the condensability gas in the mist Body is cooled off, liquefies and reclaim, thus can not only reclaim reliably condensing gas, and can be simply Prevent in the emission gases after condensing gas is sneaked into processing in a large number.
Such as the technical scheme 2 described methods that from mist, reclaim condensing gas, because in adsorption material Heater is set, easily on-condensable gas is in saturated shape from absorption on-condensable gas in the material Degassed on the sorbing material of attitude, so can improve the efficient that reclaims operation.
Such as the technical scheme 3 described methods that from mist, reclaim condensing gas, arrange owing to adopt The condensing gas retracting device of a pair of mist separator is to make all the time condensing gas retracting device worker Do and can reclaim continuously operation, so can expect to improve the efficient that reclaims operation.
Such as technical scheme 4 to the 6 described methods that from mist, reclaim condensing gas, because in office One occasion all can be cooled off sorbing material, therefore, can make easily the temperature of mist separator inside even, And owing to can guarantee all the time the starting of the starting mixture body Natural Circulation of mist separator inside Power also helps and improves the efficient that reclaims operation, so very suitable.
Such as the condensing gas retracting device of technical scheme 13, owing to have at least compressor, filling adsorption material Expect and possess mist separator and the vacuum pumping hardware of cooling device, so by adopting this condensability gas The body retracting device, can be reliably to the condensing gas recovery of liquefying.
Claims (13)
1. a recovery method that reclaims condensing gas from mist is the recovery method that adopts the condensing gas retracting device, reclaims condensing gas from mist, and the condensing gas retracting device has at least:
Mist by condensing gas and on-condensable gas composition is given compressor for compressing;
Filling is adsorbed the sorbing material of on-condensable gas and is possessed the mist separator of cooling device; And
Vacuum pumping hardware,
It is characterized in that having at least:
To import the 1st operation of described mist separator by the described mist of described compressor high-pressure trend;
Make on-condensable gas absorption in the described mist on described sorbing material and the 2nd operation that described condensing gas is liquefied and reclaims by described mist separator being cooled off at high pressure conditions with described cooling device;
Under with the low-pressure state of described vacuum pumping hardware after, from the described sorbing material that has adsorbed on-condensable gas with the internal gas exhaust of described mist separator with the 3rd operation of the on-condensable gas degassing.
2. a recovery method that reclaims condensing gas from mist is the recovery method that adopts the condensing gas retracting device, reclaims condensing gas from mist, and the condensing gas retracting device has at least:
Mist by condensing gas and on-condensable gas composition is given compressor for compressing;
The sorbing material of filling absorption on-condensable gas also possesses cooling device and the mist separator of heater; And
Vacuum pumping hardware,
It is characterized in that having at least:
To import the 1st operation of described mist separator by the described mist of described compressor high-pressure trend;
Make on-condensable gas absorption in the described mist on described sorbing material and the 2nd operation that described condensing gas is liquefied and reclaims by described mist separator being cooled off at high pressure conditions with described cooling device;
Under with the low-pressure state of described vacuum pumping hardware after, by the described sorbing material that has adsorbed on-condensable gas being heated with described heater with the internal gas exhaust of described mist separator from the described sorbing material with the 3rd operation of the on-condensable gas degassing.
3. the recovery method that reclaims condensing gas from mist as claimed in claim 1 is characterized in that,
Employing is provided with the described condensing gas retracting device of a pair of described mist separator, and described mist separator is when carrying out described the 2nd operation, and another described mist separator carries out described the 3rd operation.
4. the recovery method that reclaims condensing gas from mist as claimed in claim 1 is characterized in that,
Employing is embedded in described condensing gas retracting device in the described sorbing material with described cooling device.
5. the recovery method that reclaims condensing gas from mist as claimed in claim 1 is characterized in that,
Employing is configured in described sorbing material the top of described mist separator inside, described cooling device is configured in the described sorbing material below of described mist separator inside and the also described condensing gas retracting device of configuration in described sorbing material.
6. the recovery method that reclaims condensing gas from mist as claimed in claim 1 is characterized in that,
Employing is configured in described sorbing material the top of described mist separator inside, described cooling device is configured in the described condensing gas retracting device of the described sorbing material below of described mist separator inside.
7. the recovery method that reclaims condensing gas from mist as claimed in claim 1 is characterized in that,
The columnar described mist separator that employing is made closed at both ends with container shapes is configured to the described condensing gas retracting device that its major axis is an approximate horizontal.
8. the recovery method that reclaims condensing gas from mist as claimed in claim 1 is characterized in that,
It is approximate horizontal that the columnar described mist separator that employing is made closed at both ends with container shapes is configured to its major axis, will traverse at the described condensing gas retracting device of one or more thermal conductor axial arrangement on described sorbing material and the described cooling device on described mist separator.
9. the recovery method that reclaims condensing gas from mist as claimed in claim 1 is characterized in that,
Described condensing gas is sulfur hexafluoride (SF
6) any in gas, Freon gas or the hydrocarbon gas.
10. the recovery method that reclaims condensing gas from mist as claimed in claim 1 is characterized in that,
Described on-condensable gas is nitrogen or airborne any.
11. the recovery method that reclaims condensing gas from mist as claimed in claim 1 is characterized in that,
Described sorbing material is the aluminosilicate that comprises calcium.
12. the recovery method that reclaims condensing gas from mist as claimed in claim 1 is characterized in that,
Described condensing gas is the electrical equipment condensing gas.
13. a condensing gas retracting device is characterized in that having at least:
The mist that condensing gas and on-condensable gas are formed gives compressor for compressing;
Filling is adsorbed the sorbing material of on-condensable gas and is possessed the mist separator of cooling device; And
Vacuum pumping hardware.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98126562A CN1243022A (en) | 1998-07-27 | 1998-12-30 | Method for recovering condensed gas from mixed gas, and recovering apparatus thereof |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP211013/1998 | 1998-07-27 | ||
| CN98126562A CN1243022A (en) | 1998-07-27 | 1998-12-30 | Method for recovering condensed gas from mixed gas, and recovering apparatus thereof |
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| Publication Number | Publication Date |
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| CN1243022A true CN1243022A (en) | 2000-02-02 |
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ID=5229730
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN98126562A Pending CN1243022A (en) | 1998-07-27 | 1998-12-30 | Method for recovering condensed gas from mixed gas, and recovering apparatus thereof |
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| Country | Link |
|---|---|
| CN (1) | CN1243022A (en) |
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