CN206138776U - Desorption formula storage tank VOC recovery plant is inhaled to asymmetry - Google Patents
Desorption formula storage tank VOC recovery plant is inhaled to asymmetry Download PDFInfo
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- CN206138776U CN206138776U CN201621192110.3U CN201621192110U CN206138776U CN 206138776 U CN206138776 U CN 206138776U CN 201621192110 U CN201621192110 U CN 201621192110U CN 206138776 U CN206138776 U CN 206138776U
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Abstract
The utility model discloses a desorption formula storage tank VOC recovery plant is inhaled to asymmetry, including first trip valve, one -level oil and gas condenser, second grade oil and gas condenser, second trip valve, one -level angelica grosseserrata nature charcoal jar and third trip valve, oil -gas inlet is connected to first trip valve one end, and one -level oil and gas condenser positive going input end is connected to the other end, second grade oil and gas condenser input is connected to one -level oil and gas condenser forward output, one -level oil and gas condenser reverse input end is connected to second grade oil and gas condenser output, second trip valve one end is connected to the reverse output of one -level oil and gas condenser, and one -level angelica grosseserrata nature charcoal jar one end is connected to the second trip valve other end, the one -level angelica grosseserrata nature charcoal jar other end is connected to third trip valve one end, and the export of first oil gas is connected to the other end, first trip valve, one -level oil and gas condenser, second grade oil and gas condenser, one -level oil and gas condenser, second trip valve, one -level angelica grosseserrata nature charcoal jar and the consecutive formation of a third trip valve vapor recovery system subsystem.
Description
Technical field
This utility model is related to oil-gas recovery device field, and more particularly to a kind of asymmetric adsorption desorption formula storage tank VOC is reclaimed
Equipment.
Background technology
The oil-gas recovery device of three petroleum vapor recoveries or oil depot is traditionally used for, typically using condensation-adsorption method, absorption
The techniques such as absorption process are reclaimed, and for condensation-adsorption method, are used one-level～multistage staged and are condensed, make oil gas gradually phase transformation
Liquefaction is separated, the gas concentration isolated gradually step-down, is discharged subsequently into consequent activities charcoal system adsorption cleaning.
Absorption is to adopt two groups of (possibly multiple tanks are for one group) volume identical adsorption tanks, the absorption of one of which adsorption tanks
When, another group of adsorption tanks vacuum pump desorption and regeneration, generally 10～20 minutes adsorption desorption cycle, one group of tank absorption are finished
When, another group of tank is also desorbed and finishes, then by the adsorption desorption state of valve transfer each group tank, such alternate cycles.
Refer to the attached drawing 1, its principle process are as follows：
After pressure sensitive device 17 senses that entrance starts pressure, high-concentration oil vapor Jing air-introduced machines 1 introduce primary oil air cooling
Condenser 2 is lowered the temperature, if there is phase-change liquid to be brought out, gas part sequentially enter two grades of oil-gas condensers 3, three-level oil-gas condenser 4,
Level Four oil-gas condenser 5, the liquid portion of phase transformation are brought out.Oil gas is condensed and obtains preliminary purification, the oil gas of remaining low concentration
First absorbent charcoal adsorption tank 14 is entered by valve 6, purified gas is discharged by valve 12 again；
When the first absorbent charcoal adsorption tank 14 is when being adsorbed, the second absorbent charcoal adsorption tank 15 simultaneously being regenerated, this
When vacuum pump 16 start, valve 9 is opened, and carries out evacuation to the second absorbent charcoal adsorption tank 15, the second absorbent charcoal adsorption tank 15 it
The oil gas of front absorption is desorbed out under vacuo, and the high-concentration oil vapor being desorbed out is again introduced into two grades of oil-gas condensers 3 and draws
The air-fuel mixture that blower fan 1 is introduced, and condense step by step, uncooled gas part enters back into another group of the first absorbent charcoal adsorption tank 14
Absorption.
At the end of 15 evacuation of the second absorbent charcoal adsorption tank is fast, valve 11 is opened, in the second absorbent charcoal adsorption tank 15
Activated carbon further purge, while balance the pressure of the second absorbent charcoal adsorption tank 15, be allowed to meet absorption phase next time
Require.
Because the gas that vacuum pump 16 is extracted out has certain pressure, on the one hand the presence of air-introduced machine 1 enables high-concentration oil vapor
Equipment is introduced enough, while the pressure that outlet is produced when will not be desorbed because of vacuum pump prevents high-concentration oil vapor from entering.To ensure
The continuous operation of equipment.
But for the oil gas treating device of gas station, exhaust of oil during main process groove tank car emptying is (once
Petroleum vapor recovery) and the caused exhaust of oil (three petroleum vapor recoveries) of buried pressure tank rising, need to process during a petroleum vapor recovery
Oil gas flow is very big, reaches 30～60m3/h, and the oil gas flow that three petroleum vapor recoveries need to be processed is very little, only 1～
5m3/h。
Existing gas station oil gas processing meanss, the general exhaust of oil for causing that only raises to buried pressure tank have been carried out time
Receive, and to oil gas during emptying by the way of VLE, make oil gas be directly entered groove tank car, groove tank car is re-filled with oil gas and arrives
Oil depot goes concentration to carry out petroleum vapor recovery.
The groove tank car of oil gas is filled when charge of oil is carried out next time to oil depot, the liquid oil of oil depot loads groove tank car, gas quilt
Introduce the collection of oil depot oil-gas recovery device and process and reach discharge after environmental protection standard.
The oil-gas recovery device of gas recovery system for oil and oil depot of gas station is all that state compulsion requirement is equipped with,
But according to during above flow process practical operation, the oil-gas recovery device of oil depot usually can not be recovered to from the oil gas of groove tank car
Oil, or the oil than theoretical value much less can only be recovered to.
Trace it to its cause, there are following several possibility：
1. after emptying terminates, whether some gas station operator need hand inspection groove tank car to the groove tank car of gas station
Unsnatch, and open the top cover of groove tank car, cause groove tank in-car oil gas to be released into air；
2. the groove tank car for transporting oil to gas station may draw gasoline today, go tomorrow and be changed to draw diesel oil, and oil depot to oil depot
To the diesel oil trestle work of groove tank car charge of oil, (petroleum vapor recovery to diesel oil, country does not also force not to fill oil-gas recovery device at all
Require), so as to the petrol gas for causing groove tank in-car are run in vain into air；
3. groove tank car is not closed tight, and gas is more easy to cause the drastically change of volume, groove tank due to the change of temperature than liquid
In-car oil gas can make the close of the positions such as the increase of groove tank car internal pressure, many groove tank car caping, detection mouth due to temperature change
Closing property is not tight, and groove tank car hauls the race of car load oil gas streetful, and when next time is to oil depot charge of oil, possible internal oil gas subtracts significantly
It is few；
4. many groove tank cars also do not download the transformation of oil, and top charge of oil mouth is not of uniform size, and oil depot oil filling riser is not
Groove tank car tank mouth can be carried out effectively closed, cause the oil-gas recovery device of oil depot to be collected less than high-concentration oil vapor, affect oil depot
The yield of oil-gas recovery device.
For these reasons, it is if petroleum vapor recovery can be directly carried out in gas station's groove tank car emptying, high-concentration oil vapor is straight
Connect and become gasoline, on the one hand can increase gas station's benefit, be on the other hand conducive to environmental protection, change the in-car oil gas of present groove tank
In oil depot delay disposal far from the present situation for reaching desired effect.
For this reason, it is necessary to first say down that secondary oil gas are reclaimed and three petroleum vapor recoveries, it is that gas station exists that secondary oil gas are reclaimed
When refueling a car, the oil gas of oil gas and volatilization of refueling in automotive oil tank, from the gas circuit pipe of petroleum vapor recovery nozzle, by vacuum
Pumping returns buried tank (buried tank).
The oil gas that fuel tank volatilizees is present escapes, and must suck back more and a little just can guarantee that oil gas is as far as possible few when reclaiming oil gas
Escape, thus have partial air and be drawn back into, national regulations its vapour-liquid ratio generally 1～1.2:1 (volume ratio).Due to sucking back
Oil gas more than the oil added to automobile volume, the pressure of buried tank can gradually rise, and high breather valve to a certain extent will be beaten
Using pungent drugs for dispersion and bitter drugs for purgation pressure, makes exhaust of oil in air, and when temperature step-down, and in buried tank, gas volume reduces, and pressure step-down causes to exhale
Inhale valve and open suction air, balance the pressure of buried tank.This is also " the little breathing " being commonly called as.
So, buried tank now, just will must be installed as oil depot oil gas to environment when oil gas is breathed out
Reclaimer can make the equipment of oil gas qualified discharge like that, rather than only carry out VLE.Such equipment and reclaimed
Journey is referred to as three petroleum vapor recoveries of gas station.
Three petroleum vapor recoveries of gas station are to suck gas when solving buried tank due to temperature change or secondary recovery
Cause emission problem during pressure rise, general treating capacity is all very little, between 1NM3/h～5NM3/h.
And during gas station's emptying, a general groove tank vehicle volume is 30～60 cubic metres, whole emptying process is typically one
Hour or so is completed, that is, the oil and gas content for producing is about 30～60Nm3/h, if therefore to gas station's emptying fashionable dress as three oil gas time
Equipment as receiving, needs 30 to amplify 30 times or so the requirements that could meet petroleum vapor recovery process in other words, it is clear that this is not
It is economical, therefore, except daily can emptying up to gas stations more than 3 cars, some gas station owners for economic benefit, upper mistake
Outside oil-gas recovery processing device as the petroleum vapor recovery of three petroleum vapor recoveries or oil depot, people is there is presently no specially to adding
Petroleum vapor recovery during petrol station emptying is optimized design.
For the gas station in the whole nation more than 90%, which is daily, or per couple of days only one of which groove tank car emptying, often
About hour of secondary emptying, like this, by taking the petroleum vapor recovery processing equipment for filling a set for the treatment of capacity 50Nm3/h as an example, market
Valency is about 30～600,000, even if emptying can reclaim 200 yuan or so of oil every time, the cycle of its cost recovery is also very
Long.Due to the interval time that gas station oil gas reclaimer is used every time it is very long, if gas station oil gas reclaimer is direct
Replace the technique of adsorption desorptions using traditional double groups of activated carbons, may per 24～72 hours in only one hour really at full capacity
Use, other most times are all idle, and undoubtedly the utilization rate of adsorption desorption system is very low.
The adsorption desorption technique of 10～20 minutes traditional alternate runs is changed to adsorb during emptying completely by this utility model,
The oil-gas recovery method that emptying is desorbed according to buried pressure tank interval after finishing, reduces the fill total amount of activated carbon, particularly
The rate of air sucked in required of vacuum pump is reduced, to greatly reduce one-time investment cost, so as to promote gas station's emptying oil-gas recovery device
Popularization.
It is illustrated in figure 2 the petroleum vapor recovery (petroleum vapor recovery loaded onto in present patent application of gas station of the prior art a time
Before equipment) connection diagram, the main emptying process of an existing petroleum vapor recovery：During RTC unloading, stop valve V1 is closed, is beaten
Stop valve V3 and stop valve V5 is opened, liquid oil flows into buried tank through stop valve V5, and the oil gas in buried tank passes through stop valve
V3 returns oil truck.
Utility model content
In order to overcome deficiency of the prior art, this utility model to provide a kind of asymmetric adsorption desorption formula storage tank VOC
(Volatile Organic Compounds, VOC) reclaimer, with simple structure, floor space
Little, cost of investment is low, safety coefficient is high and it is environmentally friendly the features such as.
In order to reach above-mentioned utility model purpose, the technical scheme adopted by its technical problem is solved as follows：
The utility model discloses a kind of asymmetric adsorption desorption formula storage tank VOC reclaimers, for reclaiming buried tank or storage
The oil gas produced during tank volatilization process and emptying, including the first stop valve, one-level oil-gas condenser, two grades of oil gas condensations
Device, the second stop valve, the big charcoal canister of one-level and the 3rd stop valve, wherein：
One end connection oil and gas import of first stop valve, the other end connect the positive defeated of the one-level oil-gas condenser
Enter end；
The positive outfan of the one-level oil-gas condenser connects the input of two grades of oil-gas condensers；
The outfan of two grades of oil-gas condensers connects the reverse input end of the one-level oil-gas condenser；
The inverse output terminal of the one-level oil-gas condenser connects one end of second stop valve, second stop valve
The other end connect one end of the big charcoal canister of the one-level；
One end of 3rd stop valve connects the other end of the big charcoal canister of the one-level, and the other end connects the first oil gas
Outlet；
First stop valve, one-level oil-gas condenser, two grades of oil-gas condensers, one-level oil-gas condenser, second cut-outs
The big charcoal canister of valve, one-level and the 3rd stop valve are sequentially connected to form a petroleum vapor recovery subsystem.
Further, two grades of oil-gas condensers adopt shell-and-tube, board-like or fin-tube type structure.
Further, system also includes a refrigerating plant, and the refrigerating plant is connected with two grades of oil-gas condensers, is used
In freezing to two grades of oil-gas condensers.
One embodiment, system also include vacuum pump, pressure maintenance device and the 4th stop valve, wherein：
The import of the vacuum pump is connected with one end of the big charcoal canister of the one-level, the outlet of vacuum pump and the one-level
The positive input connection of oil-gas condenser；
One end of the pressure maintenance device is simultaneously reverse with second stop valve and the one-level oil-gas condenser
Outfan connects, and the other end is connected with one end of the 4th stop valve；
The other end of the 4th stop valve connects the second oil gas vent；
The big charcoal canister of the one-level, vacuum pump, one-level oil-gas condenser, two grades of oil-gas condensers, one-level oil gas condensations
Device, pressure maintenance device and the 4th stop valve are sequentially connected to form the first regenerating active carbon subsystem.
Another embodiment, system also include vacuum pump, pressure maintenance device, the 4th stop valve, the 5th stop valve and two
The little charcoal canister of level, wherein：
The import of the vacuum pump is connected with one end of the big charcoal canister of the one-level, the outlet of vacuum pump and the one-level
The positive input connection of oil-gas condenser；
One end of the pressure maintenance device is simultaneously reverse with second stop valve and the one-level oil-gas condenser
Outfan connects, and the other end is connected with one end of the 4th stop valve；
One end of 5th stop valve is connected with the other end of the big charcoal canister of the one-level, the other end simultaneously with it is described
One end of 4th stop valve and two grades of little charcoal canisters is connected；
The other end of two grades of little charcoal canisters is connected with one end of the 3rd stop valve；
The big charcoal canister of the one-level, vacuum pump, one-level oil-gas condenser, two grades of oil-gas condensers, one-level oil gas condensations
Device, pressure maintenance device, the 4th stop valve, two grades of little charcoal canisters and the 3rd stop valve are sequentially connected to form the second activated carbon again
Raw subsystem.
Further, the volume of two grades of little charcoal canisters is between 0.1L～100L.
Preferably, the volume of two grades of little charcoal canisters is between 1L～20L.
Further, the pressure maintenance device is capillary tube, reducing, breather valve or regulating valve.
Further, system also includes pressure sensitive device, and the pressure sensitive device is arranged at oil and gas import, and with
The first stop valve connection, to the pressure for sensing buried tank and/or storage tank.
This utility model is due to using above technical scheme, being allowed to compared with prior art, have the following advantages that and accumulate
Pole effect：
1st, in this utility model, the big charcoal canister of one-level can meet the needs of oil gas absorption of once unloading, after disposable absorption
Activated carbon is slowly regenerated using the interval unloaded twice, the recovery time is long, its vacuum pump rate of air sucked in required is little, 0.1 can be adopted
The minipump of～10Nm3/h, has greatly saved one-time investment cost, and the petroleum vapor recovery of general 30～60Nm3/h has set
The standby vacuum pump that need to often adopt 20～100Nm3/h, high cost；
2nd, in this utility model, all refrigerating plants and electrical components can adopt the civilian power supply of 220V, and gas station can be with
Directly use；
3rd, tradition condensation adsorption-type oil-gas recovery device, while when reclaiming an oil gas and three oil gas, its equipment takes up an area
Area is big, generally 2～8 square metres；According to the occupation area of equipment after this technical flow design can be controlled in 1.5 square metres with
It is interior, save originally compact gas station's land used；
4th, this technique reclaims outer except unload recovery of oil and three times that can be used for gas station, it is also possible to for other similar mediums storages
The exhaust of oil control of tank.After using this process unit is installed on each storage tank, it is possible to resolve traditional storage tank top gas recovery method
It is middle that all storage tanks are connected together, it is then unified to reclaim the storage tank blast that discharge gas is caused, other storage tanks can be involved
The technical problem of potential safety hazard；
5th, the gas station oil gas reclaimer of conventional belt absorbing process, due to needing adsorption desorption alternate run, its vacuum pump
Rate of air sucked in required configuration it is very big, electric power is also big, and adopts the vacuum pump of this technique, can be arranged to very little, has saved throwing
Money；
6th, unloaded discontinuous feature using gas station, adsorbed when being unloaded using activated carbon, regenerated when not unloading, one is big by one
The mode of little two charcoal canisters series connection, has not singly reclaimed oil gas when unloading, and gas station's exhaust emissions concentration is reached completely
Mark discharge；The activated carbon adsorption system of increase, can meet newest GB GB31571-2015 completely to the non-first of petro chemical industry
The total appropriate hydrocarbon gas of alkane discharge the rigors of 120mg/m3；
7th, using the condensation adsorption system of this technique, it is not necessary to pressurizeed using air-introduced machine as traditional handicraft true to overcome
The outlet pressure of empty pump, saves investment.Using the gas recovery system for oil of this asymmetric formula adsorption desorption, inhale de- equivalent to tradition
It is attached at the same exchange technique, save the usage amount of valve；
8th, as the second order activity canister of this technique is very little, completely can directly using filling inside process pipe itself
Activated carbon is substituting, and traditional handicraft must use the charcoal canister of big particular design, therefore this technique saves manufacturing cost.
Description of the drawings
In order to be illustrated more clearly that the technical scheme of this utility model embodiment, below will be to wanting needed for embodiment description
The accompanying drawing for using is briefly described.It is clear that drawings in the following description are only some embodiments of the present utility model,
For those skilled in the art, on the premise of not paying creative work, can be obtaining other according to these accompanying drawings
Accompanying drawing.In accompanying drawing：
Fig. 1 is the oil-gas recovery device connection diagram of gas station of the prior art a time；
【Symbol description in Fig. 1】1- air-introduced machines；2- one-level oil-gas condensers；Bis- grades of oil-gas condensers of 3-；4- three-level oil gas
Condenser；5- level Four oil-gas condensers；6- valves；7- valves；8- valves；9- valves；10- valves；11- valves；12- valves；
13- valves；The first absorbent charcoal adsorption tanks of 14-；The second absorbent charcoal adsorption tanks of 15-；16- vacuum pumps；17- pressure sensitive devices；
Fig. 2 is the oil-gas recovery device connection diagram of gas station of the prior art a time；
Fig. 3 is the emptying connection diagram after asymmetric formula oil-gas recovery device is loaded onto in this utility model；
Fig. 4 is the overall structure diagram of one asymmetric formula gas recovery system for oil of embodiment in this utility model；
Fig. 5 is the overall structure diagram of two asymmetric formula gas recovery system for oil of embodiment in this utility model；
【Primary symbols explanation in Fig. 3-5】
The first stop valves of 1-；2- one-level oil-gas condensers；Bis- grades of oil-gas condensers of 3-；The second stop valves of 4-；5- one-levels are big
Charcoal canister；The 3rd stop valves of 6-；7- refrigerating plants；8- vacuum pumps；9- pressure maintenance devices；The 4th stop valves of 10-；11- is pressed
Power induction installation；The 5th stop valves of 12-；Bis- grades of little charcoal canisters of 13-.
Specific embodiment
Below with reference to accompanying drawing of the present utility model, the technical scheme in this utility model embodiment is carried out clear, complete
Whole description and discussion, it is clear that as described herein is only a part of example of the present utility model, is not whole realities
Example, based on the embodiment in this utility model, those of ordinary skill in the art institute on the premise of creative work is not made
The every other embodiment for obtaining, belongs to protection domain of the present utility model.
As shown in figure 3, loading onto the main emptying process after asymmetric formula oil-gas recovery device：During RTC unloading, close
Stop valve V1 and V6, open stop valve V3 and V5, and liquid oil flows into buried tank, the oil gas elder generation in buried tank through stop valve V5
After stop valve V2 enters asymmetric formula device for recovering oil and gas, the tail gas after process returns oil truck by stop valve V3.
The liquid of recovery is periodically put into buried tank by stop valve V4.
Emptying is finished, and closes stop valve V3 and V5, opens stop valve V6, and oil-gas recovery device is reverted to and processes buried tank
" little breathing " is discharged.
Embodiment one
As shown in figure 4, the utility model discloses a kind of asymmetric adsorption desorption formula storage tank VOC reclaimers, for reclaiming
The oil gas produced during buried tank or storage tank volatilization process and emptying, including the first stop valve 1, one-level oil-gas condenser 2, two
Level oil-gas condenser 3, the big charcoal canister 5 of the second stop valve 4, one-level and the 3rd stop valve 6, wherein：
One end connection oil and gas import of first stop valve 1, the other end connect the forward direction of the one-level oil-gas condenser 2
Input；The positive outfan of the one-level oil-gas condenser 2 connects the input of two grades of oil-gas condensers 3；Described two
The outfan of level oil-gas condenser 3 connects the reverse input end of the one-level oil-gas condenser 2；The one-level oil-gas condenser 2
Inverse output terminal connect one end of second stop valve 4, the other end of second stop valve 4 connects the one-level Radix Angelicae Dahuricae (Radix Heraclei Scabridi)
One end of property canister 5；One end of 3rd stop valve 6 connects the other end of the big charcoal canister of the one-level 5, other end connection
First oil gas vent.First stop valve 1,2, two grades of oil-gas condensers 3 of one-level oil-gas condenser, one-level oil-gas condenser 2,
The big charcoal canister 5 of second stop valve 4, one-level and the 3rd stop valve 6 are sequentially connected to form a petroleum vapor recovery subsystem.
Further, two grades of oil-gas condensers 3 adopt shell-and-tube, board-like or fin-tube type structure.
With continued reference to Fig. 4, system also includes a refrigerating plant 7, the refrigerating plant 7 and two grades of oil-gas condensers 3
It is connected, for freezing to two grades of oil-gas condensers 3.In the present embodiment, the refrigerating plant 7 can be using machinery system
Cold, pulse tube refrigeration or thermoacoustic refrigeration.
Additionally, system also includes vacuum pump 8, pressure maintenance device 9 and the 4th stop valve 10, wherein：
One end of the big charcoal canister of the import of the vacuum pump 8 and the one-level 5 is connected, the outlet of vacuum pump 8 with it is described
The positive input connection of one-level oil-gas condenser 2；
One end of the pressure maintenance device 9 is simultaneously anti-with second stop valve 4 and the one-level oil-gas condenser 2
Connect to outfan, the other end is connected with one end of the 4th stop valve 10；
The other end of the 4th stop valve 10 connects the second oil gas vent；
The big charcoal canister 5 of the one-level, vacuum pump 8, one-level oil-gas condenser 2, two grades of oil-gas condensers 3, one-level oil gas
Condenser 2, pressure maintenance device 9 and the 4th stop valve 10 are sequentially connected to form the first regenerating active carbon subsystem.
In the present embodiment, the pressure maintenance device 9 is capillary tube, reducing, breather valve or regulating valve.Other embodiments
In, the 4th stop valve 10 that bore can be adopted little substitutes pressure maintenance device 9, improves the condensation inside two grades of oil-gas condensers
Pressure.
Preferably, system also includes pressure sensitive device 11, and the pressure sensitive device 11 is arranged at oil and gas import, and
It is connected with first stop valve 1, to the pressure for sensing buried tank and/or storage tank.
Specific oil-gas recovery method corresponding to embodiment one, concrete operating principle are comprised the following steps：
Step 1：The oil gas produced when unloading or during tinning into one-level oil-gas condenser, is made after the first stop valve
Obtain temperature to be reduced between -10～+10 DEG C, and remove the most of moisture in oil gas；
Step 2：The oil gas of preliminary pre-cooling enters back into two grades of oil-gas condensers, and refrigerating plant is exported to two grades of oil-gas condensers
Cold, makes oil gas temperature be reduced to -10～-80 DEG C, and some hydrocarbon material in oil gas is condensed recovery, the gas of remaining low temperature
Returning again to one-level oil-gas condenser carries out heat exchange into the high-temperature oil gas of one-level oil-gas condenser with the first stop valves of Jing, reclaims
After cryogenic energy, the second stop valves of Jing enter the big charcoal canister of one-level, intercept condensation phase could not phase transformation completely oil gas, cleaning
The 3rd stop valves of oil gas Jing and the first oil gas vent enter tank car, pressure of unloading is balanced with this；
Step 3：The big activated carbon canister of one-level is regenerated when not unloading or during non-tinning.
Further, step 3 specifically includes following steps 31：
The big activated carbon canister of one-level is regenerated after groove tank car is unloaded or tinning is finished, during regeneration, refrigerating plant is transported as usual
OK, the first stop valve, the second stop valve and the 3rd stop valve are closed, starting vacuum pump carries out taking out true to the big activated carbon canister of one-level
Sky, pumpdown time are set to 1-6 hours, make the oil gas of regenerating active carbon, activated carbon adsorption be entered one-level by vacuum pumped
Oil-gas condenser, part high-concentration oil vapor are condensed, and uncooled gas is partially into two grades of oil-gas condensers, overwhelming majority oil
Gas is condensed discharge, and the remaining uncooled gas part of small part Jing pressure Jing after one-level oil-gas condenser reclaims cold maintains dress
Put, then the 4th stop valves of Jing are discharged, discharge gas and tank evacuated tube or chemical plant are buried by the second oil gas vent and gas station original place
Former storage tank evacuated tube connection, or directly it is connected into buried tank or tank inside.
Further, further comprising the steps of 32 after step 31：
When the big activated carbon canister of one-level is just in regenerative process, the pressure sensing device senses being arranged at oil and gas import are buried
Tank or pressure of storage tank are increased to the pressure that should be processed, then vacuum pump quits work, and open the first stop valve and the second stop valve, and one
After the big activated carbon canister pressure balance of level, then the 3rd stop valve is opened, after making buried tank or the complete pressure release of storage tank, then restart step
Rapid 31.
Embodiment two
As shown in figure 5, being that system is except bag in place of the present embodiment and the gas recovery system for oil difference described in embodiment one
Include outside vacuum pump 8, pressure maintenance device 9, the 4th stop valve 10, also including the 5th stop valve 12 and two grades of little charcoal canisters
13, wherein：
One end of the big charcoal canister of the import of the vacuum pump 8 and the one-level 5 is connected, the outlet of vacuum pump 8 with it is described
The positive input connection of one-level oil-gas condenser 2；
One end of the pressure maintenance device 9 is simultaneously anti-with second stop valve 4 and the one-level oil-gas condenser 2
Connect to outfan, the other end is connected with one end of the 4th stop valve 10；
The other end of the big charcoal canister of one end of the 5th stop valve 12 and the one-level 5 is connected, the other end simultaneously with
4th stop valve 10 is connected with one end of two grades of little charcoal canisters 13；
The other end of two grades of little charcoal canisters 13 is connected with one end of the 3rd stop valve 6；
The big charcoal canister 5 of the one-level, vacuum pump 8, one-level oil-gas condenser 2, two grades of oil-gas condensers 3, one-level oil gas
Condenser 2, pressure maintenance device 9,10, two grades of little charcoal canisters 13 of the 4th stop valve and the 3rd stop valve 6 are sequentially connected to be formed
Second regenerating active carbon subsystem.
Further, the volume of two grades of little charcoal canisters 13 is between 0.1L～100L.Preferably, described two grades little
The volume of charcoal canister 13 is between 1L～20L.As two grades of little charcoal canisters 13 are very little, in certain embodiments, also may be used
Directly to be replaced with oil and gas pipes filling activated carbon.
Specific oil-gas recovery method corresponding to embodiment one, concrete operating principle are comprised the following steps：
Step A：The oil gas produced when unloading or during tinning into one-level oil-gas condenser, is made after the first stop valve
Obtain temperature to be reduced between -10～+10 DEG C, and remove the most of moisture in oil gas；
Step B：The oil gas of preliminary pre-cooling enters back into two grades of oil-gas condensers, and refrigerating plant is exported to two grades of oil-gas condensers
Cold, makes oil gas temperature be reduced to -10～-80 DEG C, and some hydrocarbon material in oil gas is condensed recovery, the gas of remaining low temperature
Returning again to one-level oil-gas condenser carries out heat exchange into the high-temperature oil gas of one-level oil-gas condenser with the first stop valves of Jing, reclaims
After cryogenic energy, the second stop valves of Jing enter the big charcoal canister of one-level, intercept condensation phase could not phase transformation completely oil gas, cleaning
The 5th stop valves of oil gas Jing, then bis- grades of little activated carbon canisters of Jing, the 3rd stop valve and the first oil gas vent be directly discharged into air or
Enter tank car and balance pressure of unloading；
Step C：The big activated carbon canister of one-level is regenerated when not unloading or when storage tank does not feed.
Further, step C specifically includes following steps C1：
The big activated carbon canister of one-level is regenerated after groove tank car is unloaded or tinning is finished, during regeneration, refrigerating plant is transported as usual
OK, the first stop valve, the second stop valve and the 5th stop valve are closed, starting vacuum pump carries out taking out true to the big activated carbon canister of one-level
Sky, pumpdown time are set to 1-6 hours, make the oil gas of regenerating active carbon, activated carbon adsorption be entered one-level by vacuum pumped
Oil-gas condenser, part high-concentration oil vapor are condensed, and uncooled gas is partially into two grades of oil-gas condensers, overwhelming majority oil
Gas is condensed discharge, and the remaining uncooled gas part of small part Jing pressure Jing after one-level oil-gas condenser reclaims cold maintains dress
Put, then the 4th stop valves of Jing drain into two grades of little activated carbon canisters of rear end, most after the 3rd stop valves of Jing and the first oil gas vent will be clean
Net oil gas is discharged.
Further, step C1 specifically includes following steps C2：
When the big activated carbon canister of one-level is just in regenerative process, the pressure sensing device senses being arranged at oil and gas import are buried
Tank or pressure of storage tank are increased to the pressure that should be processed, then vacuum pump quits work, and open the first stop valve, the 4th stop valve and the
Five stop valves, buried tank or storage tank Jing pressure maintenance devices fill into the big activated carbon canister of one-level of partial vacuum, equilibrium adsorption
Pressure tank, normally opens the second stop valve, the 5th stop valve and the 3rd stop valve afterwards again, makes buried tank or the complete pressure release of storage tank
Afterwards, then restart step C1.
Further, the further comprising the steps of C3 of step C2：
After the completion for the treatment of that the big activated carbon canister of one-level regenerates substantially, then the 5th stop valve is opened, close the 3rd stop valve and the 4th
Two grades of little activated carbon canisters are regenerated by stop valve, due to two grades little activated carbon canister volumes it is very little, so internal incoagulability gas
Body is seldom, slightly elevated to the pressure in the whole space between the 4th stop valve by vacuum pump outlet, you can to offset this part not
The volume of solidifying property gas so that be not required to arrange special exhaust outlet when regenerating two grades of little charcoal canisters.
The above, only this utility model preferably specific embodiment, but protection domain of the present utility model is not
This is confined to, any those familiar with the art can be readily occurred in the technical scope that this utility model is disclosed
Change or replacement, should all cover within protection domain of the present utility model.Therefore, protection domain of the present utility model should
It is defined by scope of the claims.
Claims (9)
1. a kind of asymmetric adsorption desorption formula storage tank VOC reclaimers, for reclaiming buried tank or storage tank volatilization process and emptying mistake
The oil gas produced in journey, it is characterised in that cut including the first stop valve, one-level oil-gas condenser, two grades of oil-gas condensers, second
The big charcoal canister of disconnected valve, one-level and the 3rd stop valve, wherein：
One end connection oil and gas import of first stop valve, the other end connect the positive input of the one-level oil-gas condenser
End；
The positive outfan of the one-level oil-gas condenser connects the input of two grades of oil-gas condensers；
The outfan of two grades of oil-gas condensers connects the reverse input end of the one-level oil-gas condenser；
The inverse output terminal of the one-level oil-gas condenser connects one end of second stop valve, second stop valve it is another
One end connects one end of the big charcoal canister of the one-level；
One end of 3rd stop valve connects the other end of the big charcoal canister of the one-level, and the other end connects the first oil gas and goes out
Mouthful；
First stop valve, one-level oil-gas condenser, two grades of oil-gas condensers, one-level oil-gas condenser, the second stop valve, one
The big charcoal canister of level and the 3rd stop valve are sequentially connected to form a petroleum vapor recovery subsystem.
2. a kind of asymmetric adsorption desorption formula storage tank VOC reclaimers according to claim 1, it is characterised in that described two
Level oil-gas condenser adopts shell-and-tube, board-like or fin-tube type structure.
3. a kind of asymmetric adsorption desorption formula storage tank VOC reclaimers according to claim 2, it is characterised in that system is also
Including a refrigerating plant, the refrigerating plant is connected with two grades of oil-gas condensers, for two grades of oil-gas condensers
Freezed.
4. a kind of asymmetric adsorption desorption formula storage tank VOC reclaimers according to claim 3, it is characterised in that system is also
Including vacuum pump, pressure maintenance device and the 4th stop valve, wherein：
The import of the vacuum pump is connected with one end of the big charcoal canister of the one-level, the outlet of vacuum pump and the one-level oil gas
The positive input connection of condenser；
The reverse output simultaneously with second stop valve and the one-level oil-gas condenser of one end of the pressure maintenance device
End connection, the other end are connected with one end of the 4th stop valve；
The other end of the 4th stop valve connects the second oil gas vent；
The big charcoal canister of the one-level, vacuum pump, one-level oil-gas condenser, two grades of oil-gas condensers, one-level oil-gas condenser, pressures
Power maintains device and the 4th stop valve to be sequentially connected to form the first regenerating active carbon subsystem.
5. a kind of asymmetric adsorption desorption formula storage tank VOC reclaimers according to claim 3, it is characterised in that system is also
Including vacuum pump, pressure maintenance device, the 4th stop valve, the 5th stop valve and two grades of little charcoal canisters, wherein：
The import of the vacuum pump is connected with one end of the big charcoal canister of the one-level, the outlet of vacuum pump and the one-level oil gas
The positive input connection of condenser；
The reverse output simultaneously with second stop valve and the one-level oil-gas condenser of one end of the pressure maintenance device
End connection, the other end are connected with one end of the 4th stop valve；
One end of 5th stop valve is connected with the other end of the big charcoal canister of the one-level, and the other end is simultaneously with the described 4th
One end of stop valve and two grades of little charcoal canisters is connected；
The other end of two grades of little charcoal canisters is connected with one end of the 3rd stop valve；
The big charcoal canister of the one-level, vacuum pump, one-level oil-gas condenser, two grades of oil-gas condensers, one-level oil-gas condenser, pressures
Power maintains device, the 4th stop valve, two grades of little charcoal canisters and the 3rd stop valve to be sequentially connected to form the second regenerating active carbon
System.
6. a kind of asymmetric adsorption desorption formula storage tank VOC reclaimers according to claim 5, it is characterised in that described two
The volume of the little charcoal canister of level is between 0.1L～100L.
7. a kind of asymmetric adsorption desorption formula storage tank VOC reclaimers according to claim 6, it is characterised in that described two
The volume of the little charcoal canister of level is between 1L～20L.
8. according to a kind of asymmetric adsorption desorption formula storage tank VOC reclaimers described in claim 4 or 5, it is characterised in that institute
Pressure maintenance device is stated for capillary tube, reducing, breather valve or regulating valve.
9. a kind of asymmetric adsorption desorption formula storage tank VOC reclaimers according to claim 1, it is characterised in that system is also
Including pressure sensitive device, the pressure sensitive device is arranged at oil and gas import, and is connected with first stop valve, to
Sense the pressure of buried tank and/or storage tank.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201621192110.3U CN206138776U (en) | 2016-10-28 | 2016-10-28 | Desorption formula storage tank VOC recovery plant is inhaled to asymmetry |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109432941A (en) * | 2018-12-13 | 2019-03-08 | 张全厚 | Vehicular exhaust treatment system |
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2016
- 2016-10-28 CN CN201621192110.3U patent/CN206138776U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109432941A (en) * | 2018-12-13 | 2019-03-08 | 张全厚 | Vehicular exhaust treatment system |
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