JP2009000646A - Gasoline vapor recovery vessel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a gasoline vapor recovery vessel loaded on a gasoline vapor recovery apparatus adsorbing (recovering) gasoline vapor generated in works of several times a day and desorbing (recycling), and stably adsorbing gasoline vapor. <P>SOLUTION: The gasoline vapor recovery vessel 10 is provided with a double tube composed of an inner tube 12 and an outer tube 11. A space storing brine 15, an evaporator 21 cooling the brine 15, and a gasoline condenser 30 introducing gasoline vapor are provided in the inner tube 12. An adsorbent 16 adsorbing gasoline vapor not liquefied in the gasoline vapor condenser 30 is packed in a space 19 formed between the inner tube 12 and outer tube 11, and both of the gasoline condenser 30 and adsorbent 16 can be cooled by the brine 15. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a gasoline vapor collection container for collecting vaporized gasoline (hereinafter referred to as gasoline vapor).

  Gasoline vapor generated from a gas station or the like and released into the atmosphere causes environmental pollution such as photochemical smog, and adversely affects the human body. Also, it is not preferable to leave the gasoline vapor released in the atmosphere from the viewpoint of disaster prevention. Gasoline vapor is often released into the atmosphere from gasoline tanks such as automobiles and underground tanks that store gasoline. Therefore, various apparatuses have been proposed in which such gasoline vapor is recovered, and the recovered gasoline vapor is liquefied and reused.

  As such, “in an adsorption apparatus consisting of switching between adsorption and desorption alternately, an adsorbent layer made of activated carbon and / or hydrophobic silica gel having an adsorption pore size in the range of 10 to 100 angstroms. The exhaust gas generated in a relatively small amount and intermittently through the adsorbent layer is continuously passed during the gas generation period, and volatile hydrocarbons in the exhaust gas are passed through the adsorber. During this period, exhaust gas that does not contain volatile hydrocarbons was discharged from the outlet of the adsorption device, and during the period when the generation of exhaust gas stopped, a large amount of volatile hydrocarbons were stored first. The adsorber is switched to the desorption operation as it is, and the exhaust gas containing volatile hydrocarbons consists of taking out the adsorbed volatile hydrocarbons from the desorber as concentrated volatile hydrocarbons. The processing method "is proposed (e.g., see Patent Document 1).

  In this method of treating exhaust gas containing volatile hydrocarbons, hydrocarbons in exhaust gas are adsorbed to a single adsorption tower within a predetermined time, and then the hydrocarbons adsorbed to the adsorption tower are removed with a vacuum pump or the like. I try to remove it. Such an exhaust gas treatment method is called “reservoir system”, and is disposed in a fueling facility such as a gas station, for example, and recovers gasoline vapor (exhaust gas) released from the fueling facility into the atmosphere. It is used when processing gasoline vapor.

  Further, “a method of recovering gasoline vapor-containing exhaust gas discharged from an underground tank of a gas station with a two-column pressure swing adsorption device, which is an adsorbent by introducing the gasoline vapor-containing exhaust gas into the adsorption device of the adsorption process. Gasoline vapor is adsorbed on activated carbon having a pore diameter of 3 to 20 nm or silica gel having a pore diameter of 6 to 10 nm, the cleaned waste gas is released to the atmosphere, and the gasoline vapor adsorbed to the adsorbent of the adsorption device in the regeneration process is removed with a vacuum pump. There has been proposed a "gasoline vapor recovery method for recovering gasoline vapor that has been sucked and removed from the adsorbent into the underground tank" (see, for example, Patent Document 2).

  This gasoline vapor recovery method uses a small two-column pressure swing adsorption device that uses a specific adsorbent to efficiently recover gasoline vapor released from the underground tank of the service station (SS) into the atmosphere. It is possible. In other words, this gasoline vapor recovery method improves the efficiency of gasoline vapor recovery by repeatedly switching the functions (adsorption function and desorption function) of the two adsorption towers of the two-column pressure swing adsorption device at predetermined time intervals. It is. Such a method for recovering gasoline vapor is referred to as a “swing method”, and is excellent when, for example, gasoline vapor discharged from a gasoline tank of an automobile is recovered.

Japanese Patent Laying-Open No. 2005-205392 (page 6-7, FIG. 1) Japanese Patent Laying-Open No. 2005-199223 (page 5-6, FIG. 1)

  In the method for treating exhaust gas containing volatile hydrocarbons in Patent Document 1, gasoline vapor adsorbed in an adsorption tower is cooled by a cooler as a cooling means, and is liquefied and recovered. That is, the processing apparatus employing such a processing method has a configuration in which the cooling means and the adsorption tower are separately arranged, and the processing apparatus itself is increased in size. In addition, since the adsorbent is not cooled, the desorption efficiency when desorbing the gasoline vapor adsorbed by the adsorbent is reduced, and the amount of adsorbent is increased (the size of the apparatus is increased). ).

  In the method for recovering gasoline vapor described in Patent Document 2, the cooling means can be omitted by using an adsorbent having excellent desorption performance (regeneration condition is 50 torr (absolute pressure 6.6 kPa)). A recovery device employing such a recovery method is excellent as a method for recovering continuously generated gasoline vapor, but gasoline generated in several times a day (working time is also about 30 minutes). There is a problem that it is uneconomical to use as a method for recovering vapor. Further, since the adsorption tower is small, it is necessary to increase the number of swings, which is further uneconomical. Furthermore, since no cooling means is provided, the gasoline vapor returns to the underground tank without being liquefied. As a result, the air is finally discharged to the atmosphere from the communication pipe that connects the underground tank and the outside air.

  The present invention has been made to solve the above-described problems, and is a gasoline vapor recovery apparatus that adsorbs (recovers) and desorbs (reuses) gasoline vapor generated in operations several times a day. It is intended to provide a gasoline vapor recovery container that is mounted and stably executes gasoline vapor adsorption.

  A gasoline vapor recovery container according to the present invention is a gasoline vapor recovery container mounted on a gasoline vapor recovery device for liquefying and recovering gasoline vapor, and is composed of an inner pipe and an outer pipe having the inner pipe therein. A space formed between the inner pipe and the outer pipe by providing a double pipe and an evaporator that cools the brine and a gasoline condenser that conducts the gasoline vapor while storing the brine in the inner pipe. The portion is filled with an adsorbent that adsorbs the gasoline vapor that has passed through the gasoline condenser.

  The gasoline vapor recovery container according to the present invention is composed of a double pipe composed of an inner pipe and an outer pipe having an inner pipe inside, an evaporator for storing brine in the inner pipe and cooling the brine, gasoline A gasoline condenser that conducts the vapor is installed, and the space formed between the inner pipe and the outer pipe is filled with an adsorbent that adsorbs the gasoline vapor that could not be liquefied by the gasoline condenser, Since both the condenser and the adsorbent can be cooled, the functions of the adsorption tower and the brine tank can be integrated, and both the brine and the adsorbent can be efficiently cooled without complicating the structure. This improves the efficiency of gasoline vapor recovery.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic system configuration diagram showing the overall system configuration of a gasoline vapor recovery apparatus 100 equipped with a gasoline vapor recovery container 10 according to an embodiment of the present invention. FIG. 2 is a schematic configuration diagram illustrating the configuration of the gasoline vapor recovery container 10 in an enlarged manner. Based on FIG.1 and FIG.2, while describing the system structure of the gasoline vapor collection apparatus 100 whole, the detailed structure of the gasoline vapor collection container 10 is also demonstrated. In addition, in the following drawings including FIG.1 and FIG.2, the relationship of the magnitude | size of each structural member may differ from an actual thing.

  This gasoline vapor recovery apparatus 100 is installed in a gasoline refueling facility such as a gas station, and adsorbs (recovers) and desorbs (reuses) gasoline vapor released into the atmosphere at the gasoline refueling facility. The gasoline vapor recovery device 100 is pushed out of the storage tank 2 when supplying gasoline to the storage tank 2 such as an underground tank from the gasoline vapor generated in the work several times a day, that is, the tank truck 1 that transports the gasoline. Used to adsorb gasoline vapor.

  That is, the gasoline vapor recovery apparatus 100 adsorbs the gasoline vapor generated when the tank truck 1 having a predetermined capacity supplies gasoline to the gasoline refueling facility to the gasoline vapor collection container 10 and finishes the supply of gasoline (tank truck). It is suitable for detaching over time after the work of 1). Gasoline vapor that is released from the gasoline tank of the fueling machine through the fueling port when refueling an automobile or the like, and gasoline vapor that is released from the vent pipe after refueling is absorbed and desorbed. This is not to deny execution by the collection device 100.

  The gasoline vapor recovery device 100 includes a gasoline vapor recovery container 10, a refrigeration device 20, a gasoline condenser 30, a compression pump 41, a pressure adjustment valve 42, an on-off valve 43, a gas-liquid separator 44, and an adsorption. The apparatus 50 is comprised. The gasoline vapor recovery container 10 is characterized by having both a function as an adsorption tower and a function as a brine tank. As shown in FIG. 2, the gasoline vapor recovery container 10 is configured as a double pipe structure in which a cylindrical inner pipe 12 is arranged concentrically inside a cylindrical outer pipe 11. Then, the inner pipe 12 is made to function as a space for storing the brine 15, that is, a brine tank (for example, capacity 200 [l]), and the brine 15 is stored inside and formed between the outer pipe 11 and the inner pipe 12. The space portion 19 is filled with an adsorbent 16 (for example, 30 [kg]).

  Further, since the space portion (adsorbent filling portion) 19 of the gasoline vapor recovery container 10 is pressurized by the compression pump 41 (about 300 kPa · abs), an upper lid for preventing gasoline vapor leakage. 13 and similarly covered with a lower lid 14 to prevent leakage of gasoline vapor. The upper lid 13 is fastened and fixed to a flange 63 protruding to the outer peripheral side of the outer tube 11 by a fastening member 64 such as a bolt, and the lower lid 14 is fastened to a flange 61 protruding to the outer peripheral side of the outer tube 11 with a bolt or the like. The member 62 is fastened and fixed. Note that either the upper lid 13 or the lower lid 14 may be integrated with the inner tube 12 and the outer tube 11. At least one through hole 68 for penetrating the gasoline vapor outflow pipe 18 is formed in the upper lid 13, and at least one through hole 67 for penetrating the gasoline vapor inflow pipe 17 is formed in the lower lid 14. Two or more are formed (described in detail in FIG. 3).

  The inside of the inner pipe 12 of the gasoline vapor recovery container 10 is filled with brine 15, and an evaporator 21 connected to the refrigeration apparatus 20 is arranged at the upper part, and the gasoline condensation for liquefying the gasoline vapor at the lower part. A container 30 is arranged. That is, the brine 15 is cooled by the evaporator 21 and maintains a predetermined temperature range (for example, 0 to 5 [° C.]). The brine 15 is an antifreeze liquid composed of petroleum substances such as propylene glycol, gasoline, and kerosene.

  The lower the temperature of the brine 15, the more efficient the gasoline vapor recovery. However, the moisture contained together with the gasoline vapor may freeze and block the piping (heat transfer tube 34) constituting the gasoline condenser 30 in some cases. If the water freezes and the heat transfer tube 34 is blocked, a defrost operation for melting the water is required, and a stable gasoline vapor recovery operation may not be realized. Therefore, the temperature of the brine 15 of the gasoline vapor recovery container 10 is maintained within a temperature range in which moisture does not freeze.

  In the gasoline vapor condensing container 51, the brine 15 is stirred, and the temperature inside the entire inner pipe 12 is adjusted. That is, the brine 15 is cooled by the evaporator 21 disposed on the upper portion of the inner pipe 12 and used to cool the gasoline condenser 30. The brine 15 that has absorbed heat from the gasoline condenser 30 is moved upward by convection, so that the brine 15 is agitated in the inner pipe 12. In addition, when condensing gasoline vapor at 0 ° C. or higher, water may be used as the brine 15. A brine pump or a stirrer may be provided to stir the brine 15.

  The adsorbent 16 filled in the space 19 adsorbs gasoline vapor that has not been liquefied by the gasoline condenser 30, that is, gasoline vapor that has not been captured by the gas-liquid separator 44, for example, 1 vol% or less. The air containing gasoline vapor. That is, the gasoline vapor recovery container 10 adsorbs the gasoline vapor flowing in from the gasoline vapor inflow pipe 17 connected to the gas-liquid separator 44 with the adsorbent 16, and removes the air containing the gasoline vapor below a predetermined concentration to the gasoline vapor. It flows out from the outflow pipe 18.

  As this adsorbent 16, for example, silica gel, zeolite, activated carbon or the like may be used. When this adsorbent 16 is cooled, the adsorption efficiency of gasoline vapor is improved. Therefore, the adsorbent 16 is filled in the space 19 formed between the inner pipe 12 and the outer pipe 11, and the adsorbent is combined with the cooling of the gasoline condenser 30 by the brine 15 stored in the inner pipe 12. 16 can be cooled. That is, it is not necessary to cool the adsorbent 16 alone, the amount of the heat insulating material used in the adsorption tower can be reduced, and there is no need to newly provide a heat exchanger. In addition, since it is not necessary to remove | desorb in a short time, it is good to perform a desorption process over time. For example, the desorption process may be performed by receiving supply of air from the adsorption device 50 connected to the space 19. The adsorption device 50 is equipped with one or more adsorption / desorption towers filled with an adsorbent.

  The refrigeration apparatus 20 uses a heat pump cycle to cool the brine 15 filled in the inner pipe 12 of the gasoline vapor recovery container 10 via an evaporator 21 disposed in the upper part of the gasoline vapor recovery container 10. It is. That is, the refrigerant device 20 cools the brine 15 by causing the refrigerant to pass through the refrigerant pipe and circulating the refrigerant. For example, the refrigeration apparatus 20 is turned off (stops supply of refrigerant to the evaporator 21) when the temperature of the brine 15 is 1 [° C.] and is turned on (starts supply of refrigerant to the evaporator 21) at 3 [° C.]. It is good to control. The evaporator 21 is connected to the refrigeration apparatus 20, takes heat from the brine 15 (that is, cools the brine 15), and evaporates the refrigerant. Moreover, the evaporator 21 is comprised with the plate fin tube type heat exchanger.

  The gasoline condenser 30 is disposed below the inside of the gasoline vapor condensing container 10, and the gasoline vapor flowing from the pipe 4 is cooled by the evaporator 21 and the brine 15. The gasoline condenser 30 is also composed of a plate fin tube heat exchanger, like the evaporator 21. Although FIG. 1 shows an example in which the evaporator 21 and the gasoline condenser 30 are separately disposed above and below the gasoline vapor collection container 10, the present invention is not limited to this. For example, the upper stage of one heat exchanger may function as the evaporator 21 and the lower stage may function as the gasoline condenser 30.

  The compression pump 41 is provided in a pipe 4 that connects the storage tank 2 and the gasoline condenser 30, and sucks and pressurizes (for example, 300 kPa · abs) gasoline vapor existing in the storage tank 2 to condense the gasoline. It has a function of supplying to the container 30.

  The pressure adjustment valve 42 is used to adjust the pressure of air containing 1 vol% or less of gasoline vapor (for example, 300 kPa · abs) after the gasoline vapor is adsorbed by the adsorbent 16. The pressure adjusting valve 42 is not particularly limited as long as it can adjust the pressure. The on-off valve 43 is provided on a pipe connecting the gas-liquid separator 44 and the storage tank 2, and the opening and closing of the on-off valve 43 controls the liquid gasoline separated by the gas-liquid separator 44. 2 is conducted. The on-off valve 43 may be an electromagnetic valve or a valve that is manually opened and closed.

  The gas-liquid separator 44 is connected to the gasoline condenser 30 and captures the liquid gasoline from the gasoline vapor cooled by the gasoline condenser 30, thereby separating the liquid gasoline from the gas gasoline. To do. The gas-liquid separator 44 is connected to the gasoline vapor inflow pipe 17 so that the gaseous gasoline vapor is guided to the adsorbent 16. Liquid gasoline is returned to the storage tank 2 via the on-off valve 43 and reused.

  Although FIG. 1 shows an example in which the adsorption device 50 is connected to the gasoline vapor recovery device 100, the present invention is not limited to this. When the gasoline vapor adsorbed on the adsorbent 16 is desorbed using a vacuum pump or the like, the desorbing process can be executed by the gasoline vapor recovery container 10 alone, so the adsorber 50 is not connected. May be. However, depending on the fueling facility where the gasoline vapor recovery device 100 is installed, gasoline may be frequently supplied from the tank truck 1. In such a case, the adsorption device 50 is connected to perform adsorption and desorption. It is preferable to use a swing system that switches alternately.

  Here, the operation of the gasoline vapor recovery device 100 will be described. When gasoline is supplied from the tank truck 1 that transports gasoline to the storage tank 2 in the refueling facility, the gasoline vapor filled in the storage tank 2 is released from the storage tank 2 into the atmosphere. The gasoline concentration of this gasoline vapor is, for example, about 30 to 40 [vol%] at normal temperature. The gasoline vapor is supplied to a gasoline condenser 30 that is placed in the gasoline vapor recovery container 10 through a pipe 4 by a compression pump 41.

  The inner pipe 12 in which the gasoline condenser 30 is disposed is cooled by the evaporator 21 and filled with the brine 15 that maintains a predetermined temperature range. Therefore, the gasoline condenser 30 is cooled via the brine 15. When the brine 15 is cooled to a predetermined temperature, the refrigeration apparatus 20 stops supplying the refrigerant to the evaporator 21, and gasoline vapor is supplied to the gasoline condenser 30, and the temperature of the brine 15 rises to the predetermined temperature. Then, supply of the refrigerant to the evaporator 21 is started to cool the brine 15 within a predetermined temperature range. The gasoline vapor flows downward while being cooled through the gasoline condenser 30.

  Part of the cooled gasoline vapor is liquefied and flows out of the gasoline vapor recovery container 10, and reaches the gas-liquid separator 44 via the pipe 5. The gasoline vapor that has flowed into the gas-liquid separator 44 captures liquid gasoline and returns it to the storage tank 2. The gasoline vapor that could not be liquefied by the gasoline condenser 30 is supplied from the gas-liquid separator 44 to the adsorbent 16 of the gasoline vapor recovery container 10 through the gasoline vapor inflow pipe 17. That is, the gasoline vapor recovery container 10 functions as an adsorption tower. Gasoline vapor is adsorbed when passing through the adsorbent 16, becomes clean air having a gasoline concentration of 1 [vol%] or less, and the pressure is adjusted by the pressure regulating valve 42 via the gasoline vapor outlet pipe 18. It will be released into the atmosphere.

  The adsorbent 16 is cooled to a predetermined temperature range by the brine 15 stored in the inner pipe 12. That is, the gasoline condenser 30 and the adsorbent 16 are controlled so as to be maintained in a predetermined temperature range (for example, 0 to 5 [° C.]). The capacity of the inner pipe 12 is as large as 200 [l], for example, and it is possible to arrange an evaporator 21 and a gasoline condenser 30 that are configured by plate fin tube heat exchangers that are widely used. By doing in this way, it becomes possible to implement | achieve efficient cooling of the gasoline condenser 30 and efficient cooling of the adsorption agent 16 together.

  When the gasoline vapor adsorbed on the adsorbent 16 is desorbed, it can be desorbed by sucking the gasoline vapor from the adsorbent 16 through the adsorbing device 50 connected to the gasoline vapor recovery container 10. Further, by using a vacuum pump or the like, the gasoline vapor adsorbed on the adsorbent 16 can be desorbed. The desorbed gasoline vapor can be discharged from the gasoline vapor collection container 10 and reused. Furthermore, the function as an adsorption tower and the function as a brine tank can be provided without complicating the structure of the gasoline vapor recovery container 10. Since the temperature of the brine 15 is controlled at 0 [° C.] or higher, the moisture contained in the air does not freeze in the gasoline condenser 30. As a result, it is possible to provide a highly stable gasoline vapor recovery container 10.

  By disposing the evaporator 21 upward and the gasoline condenser 30 downward in the inner pipe 12, the temperature difference between the refrigerant supplied to the evaporator 21 and the brine 15 can be increased. As a result, the evaporator 21 can be reduced in size. Further, the convection of the brine 15 is promoted in the inner pipe 12, the heat transfer performance is improved, and the installation of a circulation pump or the like for stirring the brine 15 becomes unnecessary. Therefore, it is possible to reduce labor and cost required for manufacturing.

  FIG. 3 is an explanatory diagram for explaining the positional relationship between the through hole 68 of the upper lid 13 and the through hole 67 of the lower lid 14. 3A shows the upper lid 13, and FIG. 3B shows the lower lid 14. Based on FIG. 3, an example of the positional relationship between the through hole 68 of the upper lid 13 and the through hole 67 of the lower lid 14 will be described. As described above, the upper lid 13 is formed with a through hole 68 for penetrating the gasoline vapor outflow pipe 18, and the lower lid 14 is formed with a through hole 67 for penetrating the gasoline vapor inflow pipe 17. FIG. 3 shows an example in which four through holes 68 and four through holes 67 are formed.

  And in order to utilize effectively the adsorption agent 16 with which the space part 19 is filled, the arrangement position of the through-hole 68 and the through-hole 67 is shifted. If the through hole 68 and the through hole 67 are arranged at the same position with respect to the vertical direction, the gasoline vapor flowing from the gasoline vapor inflow pipe 17 will not pass uniformly. As a result, the filling amount of the adsorbent 16 had to be increased. Therefore, the arrangement positions of the through holes 68 and the through holes 67 are shifted so that the adsorbent 16 is effectively used. If it carries out like this, it will become possible to reduce the filling amount of the adsorption agent 16, and the space part 19 can be compactized.

  FIG. 3 shows an example in which the through hole 68 and the through hole 67 are deviated by 45 ° with respect to the axial direction of the gasoline vapor recovery container 10, but the present invention is not limited to this. 68 and the through-hole 67 should just be formed in the position which does not oppose with respect to the axial direction of the gasoline vapor collection container 10. FIG. For example, the formation position may be determined according to the number of through holes 68 formed in the upper lid 13 and the number of through holes 67 formed in the lower lid 14. Here, the case where four through holes 68 and four through holes 67 are formed is shown as an example, but the number of formed holes is not limited to four. Further, the numbers of the through holes 68 and the through holes 67 may be different.

  FIG. 4 is an explanatory diagram for explaining the configuration of the gasoline condenser 30 disposed in the inner pipe 12. 4 (a) is an enlarged perspective view showing a part of the gasoline condenser 30 in an enlarged manner, and FIG. 4 (b) is a schematic longitudinal sectional view showing a schematic section when the gasoline condenser 30 is viewed from the side. FIG. 4C is a schematic longitudinal sectional view showing a schematic cross section of the gasoline condenser 30 as viewed from the front. Based on FIG. 4, the structure of the gasoline condenser 30 is demonstrated in detail. The gasoline condenser 30 is composed of a plate fin tube heat exchanger as described above, and is disposed in the inner pipe 12.

  An inlet header 35 is attached to the upper portion of the gasoline condenser 30 and an outlet header 36 is attached to the lower portion thereof. A pipe 4 and a plurality of heat transfer pipes 34 are connected to the inlet header 35, and gasoline vapor that has flowed in from the pipe 4 is distributed to the heat transfer pipes 34 by the inlet header 35. That is, a plurality of heat transfer tubes 34 are arranged in the row direction (lateral direction) to constitute each path. Similarly to the inlet header 35, the pipe 25 and the plurality of heat transfer pipes 34 are also connected to the outlet header 36, and the gasoline vapor flowing through the heat transfer pipes 34 merges at the outlet header 36 and flows into the pipe 5. It is supposed to be.

  The heat transfer pipe 34 is folded outside the gasoline condenser 30, arranged in a plurality of stages above and below the gasoline condenser 30, and inserted into fins 33 constituting the gasoline condenser 30. . That is, in the gasoline condenser 30, the heat transfer pipes 34 are arranged in a plurality of stages in the upper and lower directions, and the gasoline condenser 30 is connected to the inlet header 35 and the outlet header 36 by connecting a plurality of paths of the heat transfer pipes 34. The pressure loss at is reduced. Then, heat exchange is performed between the gasoline vapor flowing through the heat transfer pipe 34 and the brine 15 existing around the fins 33 to cool the gasoline vapor. The number of rows and stages of the heat transfer tubes 34 in the gasoline condenser 30 are not particularly limited.

  The flow of gasoline vapor in the gasoline condenser 30 will be briefly described. When the compression pump 41 is driven, the gasoline vapor in the storage tank 2 flows into the gasoline condenser 30 via the pipe 4. This gasoline vapor first flows into the inlet header 35. The gasoline vapor is distributed to the heat transfer tubes 34 at the inlet header 35 and flows into the gasoline condenser 30. The gasoline vapor flows in the step direction (from top to bottom) and joins at the outlet header 36 while being cooled by the brine 15 between the fins 33. Then, it is returned from the outlet header 36 to the pipe 5 and flows into the gas-liquid separator 44.

  In this way, in the gasoline condenser 30, if the gasoline vapor is allowed to flow from the top to the bottom, the cooled and liquefied gasoline is affected by the gravity and smoothly flows downward, so that the gasoline is efficiently recovered. it can. Moreover, since the gasoline condenser 30 is comprised with the plate fin tube type heat exchanger which has prevailed widely, the effort and cost which manufacture requires can be reduced. Further, since the heat transfer area outside the tube can be increased, the gasoline condenser 30 itself can be reduced in size. The evaporator 21 has the same configuration as the gasoline condenser 30. Accordingly, the inner pipe 12 in which the evaporator 21 and the gasoline condenser 30 are arranged can be reduced in size, and the gasoline vapor recovery container 10 itself can be reduced in size.

1 is a schematic system configuration diagram showing a system configuration of an entire gasoline vapor recovery device equipped with a gasoline vapor recovery container according to an embodiment of the present invention. It is a schematic block diagram which expands and shows the structure of a gasoline vapor collection container. It is explanatory drawing for demonstrating the positional relationship of the through-hole of an upper cover, and the through-hole of a lower cover. It is explanatory drawing for demonstrating the structure of the gasoline condenser arrange | positioned in an inner pipe.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Tank truck, 2 Storage tank, 3 Communication pipe, 4 Piping, 5 Piping, 10 Gasoline vapor collection container, 11 Outer pipe, 12 Inner pipe, 13 Upper lid, 14 Lower lid, 15 Brine, 16 Adsorbent, 17 Gasoline vapor inflow pipe , 18 Gasoline vapor outflow pipe, 19 Space part, 20 Refrigeration system, 21 Evaporator, 30 Gasoline condenser, 33 Fin, 34 Heat transfer pipe, 35 Inlet header, 36 Outlet header, 41 Compression pump, 42 Pressure control valve, 43 Open / close Valve, 44 Gas-liquid separator, 50 Adsorber, 61 Flange, 62 Fastening member, 63 Flange, 64 Fastening member, 67 Through hole, 68 Through hole, 100 Gasoline vapor recovery device.

Claims (5)

A gasoline vapor recovery container mounted on a gasoline vapor recovery device for liquefying and recovering gasoline vapor,
A double pipe composed of an inner pipe and an outer pipe having the inner pipe inside;
In the inner pipe, while storing the brine, an evaporator for cooling the brine and a gasoline condenser for conducting the gasoline vapor are provided,
A gasoline vapor collection container, wherein an adsorbent that adsorbs gasoline vapor that has passed through the gasoline condenser is filled in a space formed between the inner tube and the outer tube. The gasoline vapor recovery container according to claim 1, wherein the evaporator is disposed above and the gasoline condenser is disposed below. An upper lid that covers upper portions of the inner tube and the outer tube, and a lower lid that covers lower portions of the inner tube and the outer tube,
In the portion covering the space portion of the upper lid and the lower lid, a through hole for flowing in and out of the gasoline vapor is formed,
The through hole formed in the upper lid and the through hole formed in the lower lid are formed at positions that are not opposed to the axial direction of the double pipe. Gasoline vapor collection container. The gasoline vapor recovery container according to any one of claims 1 to 3, wherein the evaporator and the gasoline condenser are configured by a plate fin tube heat exchanger. The gasoline vapor recovery container according to claim 4, wherein an upper stage of one plate fin tube heat exchanger is used as the evaporator and a lower stage is used as the gasoline condenser.

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