KR20180085676A - Vapor collecting device - Google Patents

Abstract

The present invention provides a vapor collecting apparatus which can reduce the investment cost for equipment, and at the same time, can promote an efficient use of land by reducing the surface area required for installation. In particular, the vapor collecting apparatus (1) comprises a vapor collecting device which collects both fuel oil vapor (V1) generated inside an underground tank (2) when unloading a fuel oil (G) and fuel oil vapor (V2) pushed out from a carrier tank by a fuel oil supplied by a fuel supply device of a fuel supply apparatus (4). According to the present invention, it is possible to install a vent pipe (3) inserted in the underground tank, a vapor collecting pipe (4h) in which fuel oil vapor is introduced, a connection pipe (22) communicating the vent pipe and the vapor collecting pipe, and a vapor suction pipe (31) sucking in fuel oil vapor. It is also possible to install a vent pipe, a plurality of vapor collecting pipes, a stand-by unit (21) separately connected to each of a plurality of vapor collecting pipes, a connection pipe communicating each vent pipe and each stand-by unit, and a vapor suction pipe communicated with the connection pipe.

Description

Vapor collecting device

The present invention relates to a vapor recovery apparatus for recovering vapor generated in a gas station.

Generally, in a gas station, fuel oil is loaded from a tank lorry into a tank buried underground, and fuel oil stored in the underground tank is supplied to the fuel tank of the vehicle by a fuel supply device.

However, when loading the fuel oil from the tank lorry into the underground tank, the fuel oil vapor staying in the upper space in the underground tank is discharged to the atmosphere through a vent pipe connected to the underground tank. The fuel tank is stored in the lower portion of the vehicle tank, and the vaporized fuel vapor is saturated there. Therefore, when the fuel oil is supplied to the vehicle-mounted tank, fuel vapor of approximately the same capacity as the fuel oil is discharged to the atmosphere.

In this way, when the vapor is released into the atmosphere, not only the resources are wasted, but also the environmental pollution is caused by the fuel oil vapor and the fire is caused by the burning of the fuel oil vapor.

In view of the above problem, the applicant of the present invention proposes a vapor recovery apparatus for recovering a fuel vapor generated at the time of lubrication to a vehicle tank in Patent Document 1, and in Patent Document 2, a fuel vapor recovered from an underground tank And a vapor recovery device for recovering the vapor.

Japanese Patent Application Laid-Open No. 2010-094640 Japanese Patent Application Laid-Open No. 2016-078893

The inventions described in the above Patent Documents 1 and 2 are effective. However, when these inventions are carried out, independent mechanisms are installed on the land of a limited gas station. Therefore, the cost of equipment investment is increased, There was a fear that it would interfere with use.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a vapor recovery apparatus capable of reducing the cost of equipment investment and reducing the area of the equipment to enable effective utilization of the ground.

In order to attain the above object, the present invention provides a vapor recovery apparatus comprising: a first fuel oil vapor generated in an underground tank below a fuel oil; and a second fuel oil vapor generated in the second fuel oil vapor pushed out from the vehicle tank by fuel oil supplied by a fuel oil supply mechanism And a vapor recovery mechanism for recovering both fuel oil vaporizers.

According to the present invention, since it is possible to collect both the first fuel oil vapor generated in the lower portion of the fuel oil and the second fuel oil vapor generated in the lubrication in the single vapor recovery device, the cost of facility investment can be reduced At the same time, it is possible to plan the effective use of the land.

The vapor recovery apparatus may further include a vent pipe in which one end is inserted into the underground tank and into which the first fuel vapor accumulates, a vapor recovery pipe through which the second fuel vapor accumulates, It is possible to provide a connection pipe communicating the pipe and a vapor suction pipe communicating with the connection pipe and sucking the first and second fuel oil vapors. As a result, it is possible to install the vapor recovery apparatus only by installing the connecting pipe, while using the existing vent pipe and the vapor return pipe in the gas station where only one oil supply device is installed, thereby facilitating piping work.

The vapor recovery apparatus according to any one of claims 1 to 3, wherein the vapor recovery apparatus comprises: a vent pipe into which one end is inserted into the underground tank and into which the first fuel vapor accumulates; a plurality of vapor collection pipes through which the second fuel vapor accumulates; And a connection pipe communicating each of the vent pipe and each of the one-time base parts; and a connecting pipe connected to the first and second fuel oil vapors, It is possible to install a vapor suction pipe for sucking the gas. As a result, it is possible to introduce the second fuel vapor accumulator into the vapor collecting mechanism by one connecting pipe at a gas station provided with a plurality of oil refueling devices, so that it is not necessary to provide a plurality of vapor return pipes.

A vapor return pipe into which one end is inserted into the underground tank and into which the first fuel oil vapor flows, a vapor recovery pipe through which the second fuel oil vapor flows and is connected to the underground tank, It is possible to provide a vapor suction pipe communicating with the vent pipe and sucking the first and second fuel vapor. Thereby, it is solved only by extending the vapor recovery pipe to the inside of the underground tank, so that it is possible to easily install the vapor recovery device at low cost.

It is also possible to provide a vapor suction pump for opening the suction pipe and a vapor suction motor for driving the vapor suction pump to control the number of revolutions. Thereby, it is possible to control the suction amount according to the capacity or the amount of oil supply, so that it is possible to prevent the suction of the excessive air and to efficiently recover the vapor, and at the same time to realize the energy saving.

A vapor control valve that is opened in the suction pipe and is capable of controlling the opening amount in accordance with the amount of oil supplied to the vehicle tank by the oil supply mechanism of the oil supply device and / It is possible to do. Thereby, it is possible to control the suction amount according to the load or the amount of oil supply, so that it is possible to prevent the suction of excess air and to efficiently recover the vapor.

It is also possible to provide an absorption / desorption tower for adsorbing / desorbing the introduced fuel vapor and recovering the fuel vapor, and a refrigerator for circulating the cooling liquid in the absorption / desorption tower. As a result, it is possible to more efficiently perform the adsorption of the fuel vapor in the adsorption / desorption column.

As described above, according to the vapor recovery apparatus of the present invention, it is possible to reduce equipment investment costs by sharing equipment, and at the same time, it is possible to effectively use the ground.

BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is an overall configuration diagram showing a first embodiment of a vapor recovery apparatus according to the present invention. FIG.
Fig. 2 is a functional block diagram of the liquid level meter control device, lubrication control device and the vapor collecting device shown in Fig. 1. Fig.
3 is an overall configuration diagram showing a second embodiment of the vapor recovery apparatus according to the present invention.
Fig. 4 is a functional block diagram of the liquid level meter control device, the lubrication control device, and the vapor recovery control device shown in Fig. 3;
5 is an overall configuration diagram showing a third embodiment of the vapor recovery apparatus according to the present invention.
Fig. 6 is an overall configuration diagram showing a fourth embodiment of the vapor recovery apparatus according to the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION Next, embodiments for carrying out the present invention will be described in detail with reference to the drawings.

1 shows a first embodiment of a vapor recovery apparatus according to the present invention in which one end of the vapor recovery apparatus 1 is inserted into an underground tank 2 and a gasoline vapor (Second fuel vapor) V2 (second fuel vapor) pushed out of the vehicle tank (not shown) by the fuel oil supplied by the fuel supply mechanism of the fuel supply device 4, A connecting pipe 22 for connecting the vent pipe 3 and the vapor collecting pipe 4h to each other and a connecting pipe 22 for connecting a gasoline vapor V3 , V2, or a mixture thereof), and recovers the gasoline vapor V3.

The underground tank 2 includes a left pit 11 in which a vent pipe 3 is disposed, a fuel filler box 12, a front inlet pipe 13, and a right pit 14 in which a front inlet pipe 13 is disposed Respectively. The gasoline G loaded on the tank lorry 15 is connected to the underground hose 15a through the unloading hose 15a and the one-way inlet pipe 13 by connecting the unloading hose 15a of the tank lorry 15 to the refueling box 12, And flows into the tank 2 to be stored.

A liquid level gauge 16 for measuring the liquid level of the gasoline G stored in the underground tank 2 is provided and a liquid level gauge 16 for calculating the remaining amount of the gasoline G from the liquid level measured mainly by the gauge 16, A controller 17 and a tank remaining amount indicator 18 for indicating the remaining amount of gasoline G calculated by the gauge controller 17 are disposed.

2, the liquid level controller 17 includes a liquid level-liquid quantity converting means 17a for converting the liquid level measured by the level gauge 16 into a liquid level, a tank remaining amount indicator driving unit 17 for driving the tank remaining amount indicator 18, And an instantaneous capacity calculation unit 17d connected to the liquid level-liquid quantity conversion means 17a and the time counting means 17c for calculating the capacity of the battery 1 minute per minute.

1, the vent pipe 3 is provided with a branch point 3a to which a vapor suction pipe 31 to be described later is connected, a junction point 3b to which an air discharge pipe 44 to be described later is connected, a branch point 3a, A vent valve 3c disposed between the vent valve 3b and the vent hole 3d, and a vent hole 3d disposed at the upper end. The gasoline vapors V1 and V2 that flow into the connecting pipe 22 are discharged from the branch point 3a to the vapor suction pipe 31 as usual because the valve is not opened unless the ventilation valve 3c reaches a predetermined pressure Flows.

The fuel supply device 4 includes a fuel supply mechanism 4 including a fuel supply nozzle 4a, a fuel supply hose 4b, a fuel supply pipe 4c, a fuel supply pump 4d, a fuel supply motor 4e, a flow meter 4f, and a display 4g (Not shown) provided in the oil supply nozzle 4a, a vapor recovery pipe 4h connected to the vapor collector, and the like. And further has an oil supply control device (5) for controlling the oil supply mechanism.

The oil supply control device 5 is connected with a nozzle switch (SW) 19 as shown in Fig. The nozzle switch 19 is turned off when the lubrication nozzle 4a is attached to a nozzle hanger (not shown), and is turned on when the lubrication nozzle 4a is missing from the nozzle hanger. On the other hand, the lubrication control device 5 includes a lubrication motor drive means 5a for driving the lubrication motor 4e when the nozzle switch 19 is turned on, and a lubrication control means 5b for counting the flow rate pulses from the flow meter 4f, (5d) connected to the display means (4g), a display drive means (5c) for driving the display (4g), a timing means (5d) And an operation unit 5e.

Returning to Fig. 1, the vapor recovery pipe 4h, one end of which is connected to the oil supply hose 4b, opens to the one-time base 21 provided at the lower part of the oil supply device 4 at the other end. Each day age base 21 is connected to the vent pipe 3 via a connection pipe 22 and the fuel oil vapor V2 recovered in each day age base 21 is introduced into the vapor recovery device 1 do.

The vapor collecting apparatus 1 includes a vapor suction pipe 31 connected to the branch point 3a of the vent pipe 3 and sucking gasoline vapor V3 (gasoline vapor V1, V2 or a mixture thereof), a vapor suction pipe 31 A vapor suction motor 33 for driving the vapor suction pump 32; a vapor recovery control device 34; and a condenser (not shown) for condensing the suctioned gasoline vapor V3 35 and an adsorption / desorption tower (36, 37) connected to the condenser (35).

The vapor recovery controller 34 includes a motor rotation number storage means 34a for storing the current rotation number of the vapor suction motor 33 as shown in Fig. 2, a vapor suction motor driving means 34 for driving the vapor suction motor 33, The amount of downshift per minute from the instantaneous dropping capacity arithmetic unit 17d of the gauge controller 17 and the amount of supply of oil per minute from the instantaneous oil supply amount arithmetic unit 5e of the lubrication control unit 5 are taken into account A comparison means 34c for comparing the present rotational speed of the vapor suction motor 33 from the motor rotational speed storage means 34a with an appropriate rotational speed and transmitting an appropriate rotational speed to the vapor suction motor driving means 34b Respectively.

1, the condenser 35 indirectly performs heat exchange between the cooling liquid C1 circulating between the condenser 35 and the refrigerator 38 and the gasoline vapor V3, thereby partially condensing the gasoline vapor V3 (L) for liquefied gasoline (L) and a residual vaporizer (R) which is left without being liquefied and remains in a gasoline vapor state and is connected to a liquid recovery pipe And a vapor introduction pipe 40 for introducing the residual vaporizer R into the adsorption / desorption columns 36 and 37 are connected.

The liquid recovery pipe 39 is connected to the remote control inlet pipe 13 for returning the liquefied gasoline L into the underground tank 2 and the liquid recovery valve 29 on the upstream side is provided with the liquid recovery valve 41 . The liquid recovery valve 41 is opened to guide the liquefied gasoline L by the condenser 35 to the underground tank 2 while the liquid recovery valve 41 is closed to open the liquid recovery valve 41 from the condenser 35 And the remaining vaporizer R by separation is guided to the adsorption / desorption towers 36, 37 via the vapor introduction pipe 40.

The adsorption / desorption towers 36 and 37 adsorb only the gasoline component from the residual vapor (R) composed of the gasoline component and the air component supplied from the condenser 35 via the vapor introduction pipe 40, And a desorbing function for desorbing the adsorbed gasoline component. A refrigerating machine 42 for circulating a cooling liquid C2 for cooling the gasoline vapor V3 is installed in the adsorption / desorption towers 36 and 37.

In the adsorption / desorption towers 36 and 37, a plurality of unidirectional valves 43a to 43f are disposed on the front and rear piping of the adsorption / desorption towers 36 and 37 for switching the adsorption function and the desorption function. The air component is supplied to the vent pipe 3 via the air discharge pipe 44 and is discharged to the outside via the vent hole 3d. The gasoline component is returned to the upstream side of the condenser 35 through the vapor recovery pipe 45 and introduced into the condenser 35 as a mixed gasoline vapor M with the gasoline vapor V3 flowing into the vapor suction pipe 31 do.

The air discharge pipe 44 is provided with a pressure adjusting valve 46, and adjusts the pressure of the air component to an atmospheric pressure when the air component passes through the pressure adjusting valve 46.

Next, the operation of the vapor recovery apparatus 1 or the like having the above-described configuration will be described with reference to Figs. 1 and 2. Fig.

When the unloading of the gasoline G is started from the tank lorry 15, the gasoline vapor V1 staying in the underground tank 2 flows into the vent pipe 3 by driving the vapor suction pump 32, And is sucked to the vapor suction pipe 31 as gasoline vapor V3.

When the lubrication by the lubrication device 4 is started, the gasoline G supplied by the lubrication device of the lubrication device 4 by driving a vapor suction pump (not shown) provided in the lubrication device 4 The gasoline vapor V2 pushed out of the vehicle tank flows into the vapor recovery pipe 4h and is temporarily stored in the one time base 21 to drive the vapor suction pump 32, (V2) is sucked into the vapor suction pipe (31) through the connecting pipe (22) as gasoline vapor (V3).

The gasoline vapor V3 aspirated by the vapor suction tube 31 is introduced into the condenser 35 and the liquefied gasoline L condensed through the cooling liquid C1 circulating with the refrigerator 38 is supplied to the liquid recovery pipe 39, the liquid recovery valve 41, and the pre-insertion inlet pipe 13 to the underground tank 2. On the other hand, the non-condensed residual vaporizer R is introduced into the adsorption / desorption column 36, for example, by switching the opening and closing of the osidiary valve 43 (43a to 43f).

The gasoline component is adsorbed while being cooled through the cooling liquid C2 circulating between the evaporator 42 and the refrigerating machine 42 and the air component is supplied to the air discharge pipe 44 and the air- And is discharged to the atmosphere via the ventilation hole 3d of the ventilation pipe 3.

Gasoline components of the residual vapor (R) adsorbed in the adsorption / desorption tower (36) are desorbed by switching the opening and closing of the osmosis valve (43), and the desorbed gasoline component is introduced into the condenser And is introduced to the condenser 35 as a mixed gasoline vapor M together with the gasoline vapor V3 flowing into the vapor suction pipe 31. [ At the same time, for example, in the adsorption / desorption tower 37, the gasoline vapor V3 aspirated by the vapor suction tube 31 is adsorbed. In these adsorption / desorption towers (36, 37), the opening and closing of the anisolation valve (43) is switched so that the adsorption / desorption of the gasoline vapor (V3) is carried out alternately.

In the present embodiment, the suction performance of the vapor suction pump 32 is controlled in accordance with the amount of gasoline vapor (V1, V2) generated.

The liquid level control device 17 shown in Fig. 2 controls the amount of gasoline vapor V1 generated in the inside of the underground tank 2 measured by the level gauge 16 in the liquid level-liquid amount conversion means 17a And calculates the capacity per minute by referring to the time counting means 17c in the instant capacity storage capacity calculating section 17d. The calculated capacity per minute is stored in the vapor collection controller 34, To the comparing means 34c.

The comparison means 34c calculates the optimum rotation speed of the vapor suction motor 33 from the data indicating the relationship between the received downshift per minute and the instantaneous dropping capacity shown in Table 1 and the rotational speed of the vapor suction motor 33 And controls the revolving speed of the vapor suction motor 33 to be an optimum value based on the number of rotations of the current vapor suction motor 33 obtained by referring to the motor rotation storage means 34a. In addition, since there is a large difference in the amount of gasoline vapor generated in the lubrication and the unloading, the vapor suction motor driving means 34b is controlled based only on the instantaneous dropping capacity regardless of whether or not the lubrication is performed.

Since the instantaneous oil supply amount calculation unit 5e calculates the oil supply amount counted by the counting means 5b of the oil supply control device 5 shown in Fig. 2 in response to the change in the amount of gasoline vapor V2 generated during lubrication, (5d) to calculate the feed rate per minute, and transmits the calculated feed rate per minute to the comparison means (34c) of the vapor recovery controller (34).

The comparison means 34c calculates the optimum number of revolutions of the vapor suction motor 33 from the data representing the relationship between the amount of supply per minute received and the instantaneous supply amount shown in Table 2 and the number of revolutions of the vapor suction motor 33 And controls the rotational speed of the vapor suction motor 33 to be an optimum value based on the rotational speed of the current vapor suction motor 33 obtained by referring to the motor rotational memory means 34a.

As described above, in the present embodiment, since the gasoline vapor (V1) and the gasoline vapor (V2) generated at the time of lubrication can be recovered in one vapor recovery device (1) The number of revolutions of the vapor suction motor 33 can be optimized in accordance with the amount of the down load and the amount of oil supplied, It is possible to efficiently recover the vapor.

Next, a second embodiment of the vapor recovery apparatus according to the present invention will be described with reference to Figs. 3 and 4. Fig. This vapor recovery device 51 is provided with a vapor control valve 52 on the vapor suction pipe 31 of the vapor recovery device 1 shown in FIG. And a recovery control device 53. The rest of the configuration is the same.

The vapor control valve 53 adjusts the amount of the gasoline vapor V3 sucked from the vapor suction pipe 31 after the number of revolutions of the vapor suction motor 33 is made constant So that the opening amount can be adjusted.

The vapor recovery controller 53 includes valve opening storage means 53a for storing the current opening amount of the vapor adjustment valve 52 as shown in FIG. 4, vaporizer valve driving means (not shown) for driving the vapor adjustment valve 52 The amount of downshift per minute from the instantaneous dropping capacity arithmetic unit 17d of the gauge control device 17 and the amount of supply per minute from the instantaneous oil supply amount arithmetic unit 5e of the lubrication control unit 5, And a comparison means 53c for controlling the vapor control valve driving means 53b to optimize the amount of opening of the vapor control valve 52.

In the present embodiment, the relationship between the instantaneous dropping capacity shown in Table 3 and the amount of opening of the vapor regulating valve 52, and the relationship between the instantaneous vaporizing amount shown in Table 4 and the opening amount of the vapor regulating valve 52 It is possible to control the opening amount of the vapor regulating valve 52 to an optimum value according to the instantaneous dropping capacity or the instantaneous supply flow rate. Therefore, it is possible to prevent the suction of the excess air, It is possible to collect the vapor.

Next, a third embodiment of the vapor recovery apparatus according to the present invention will be described with reference to Fig. This vapor recovery apparatus 61 is provided with a vapor recovery pipe 4 and a vapor recovery pipe 4b instead of the vaporizer base 21 and the connection pipe 22 of the vapor recovery apparatus 1 shown in Fig. The gasoline vapor V2 is introduced into the underground tank 2 and the gasoline vapor V1 in the underground tank 2 is introduced into the underground tank 2 from the point of insertion into the underground tank 2, ). According to the present embodiment, since it is solved without installing the one-time base 21 and the connecting pipe 22, it is possible to further reduce the equipment cost as compared with the first embodiment. The other configurations and operations are the same as those of the first embodiment, and the description is omitted.

Next, a fourth embodiment of the vapor recovery apparatus according to the present invention will be described with reference to Fig. The vapor recovery device 71 is not provided with the connection pipe 22 and the vaporizer base 21 of the vapor recovery device 51 shown in FIG. 3, but instead, the vapor recovery pipe 4h is connected to a vapor recovery pipe The gasoline vapor V2 is introduced into the underground tank 2 and the gasoline vapor V1 in the underground tank 2 is introduced into the underground tank 2. [ Lt; / RTI > According to the present embodiment, it is possible to further reduce the equipment cost as compared with the second embodiment because it is solved without providing the one-time base 21 and the connecting pipe 22. [ Other configurations and operations are the same as those of the second embodiment, and a description thereof will be omitted.

A minute pressure sensor 3e is provided on the upstream side of the branch point 3a of the vent pipe 3 and the minute pressure sensor 3e is provided on the upstream side of the branch point 3a of the vent pipe 3. In addition, (-10 kPa to 10 kPa) in the underground tank 2 at all times, and controls the rotational speed of the vapor suction motor 33 or the opening amount of the vapor adjustment valve 52 in accordance with the pressure value detected It is possible. Although the micro pressure sensor 3e is shown only in Fig. 1, it is also possible to provide the micro pressure sensor 3e at the same position in the vapor recovery apparatus shown in Fig. 3, Fig. 5 and Fig. Further, it is preferable that the micro pressure sensor 3e is disposed on the upstream side of the branch point 3a so as to facilitate maintenance. However, the micro pressure sensor 3e may be provided directly in the underground tank 2.

The control based on the pressure in the underground tank 2 may be performed prior to the control based on the instantaneous dropping capacity or the instantaneous supply flow rate or when the control based on the instantaneous dropping capacity or the instantaneous supply flow rate is assisted , The control is performed based on the instantaneous dropping capacity or the instantaneous supply flow rate and the valve opening amount of the vapor adjustment valve 52 or the number of revolutions of the vapor suction motor 33 in the control based on the pressure in the underground tank 2 The rotational speed of the large side or the valve opening amount may be used.

For example, when the pressure in the underground tank 2 is the value shown in Table 5 at the time of unloading from the tank lorry 15, the vapor suction motor 33 is operated at the number of revolutions of 1000 rpm. When the pressure in the underground tank 2 at the time of lubrication from the lubrication nozzle 4a is the value shown in Table 6, the vapor suction motor 33 is operated at the rotation speed of 250 rpm.

When the pressure in the underground tank 2 at the time of unloading is the value shown in Table 7, the valve opening amount of the vapor control valve 52 is adjusted as shown in the same table, and the pressure in the underground tank 2 In the case of the values shown in Table 8, the valve opening amount of the vapor control valve 52 is adjusted as shown in the same table.

The valve lift amount of the vapor suction motor 33 or the vapor adjustment valve 52 is controlled at the output of the level gauge 16 as described above. However, when the level gauge 16 is malfunctioning The vapor suction motor 33 or the vapor adjustment valve 52 can not be controlled in accordance with the pressure value in the underground tank 2 detected by the micro pressure sensor 3e. It is possible to suck the vapor in the underground tank 2 to the vapor recovery device 1 by controlling the vapor adjustment valve 52. [ In addition, even when the instantaneous supply flow rate can not be calculated for any reason, it is also possible to suck the vapor in the underground tank 2 to the vapor recovery apparatus 1.

On the other hand, even if a pressure rise in the underground tank 2 occurs due to a failure of the vent pipe or an increase in the temperature of the underground tank 2, the pressure in the underground tank 2 is detected by detecting the pressure in the underground tank 2 2 can be sucked into the vapor recovery apparatus 1, thereby preventing the underground tank 2 from being damaged.

1: Vapor recovery device 2: Underground tank
3: vent pipe 3a: bifurcation point
3b: confluence point 3c: vent valve
3d: Vents 3e: Micro pressure sensor
4: Lubrication device 4a: Lubrication nozzle
4b: Oil hose 4c: Oil feed pipe
4d: Lubrication pump 4e: Lubrication motor
4f: Flowmeter 4g: Indicator
4h: Vapor recovery pipe 5: Lubrication control device
11: left pit 12: oil box
13: One-side intrusion 14: Right side pit
15: tank lorry 15a: unloading hose
16: liquid level meter 17: liquid level meter control device
18: Residual indicator 19: Nozzle switch
21: Day-time donation 22: Connector
31: Vapor aspirator 32: Vapor aspiration pump
33: Vapor suction motor 34: Vapor recovery control device
35: condenser 36, 37: absorption / desorption tower
38: refrigerator 39: liquid recovery pipe
40: Vapor introduction pipe 41: Liquid recovery valve
42: refrigerator 43 (43a to 43f): anisotropic valve
44: Air discharge pipe 45: Vapor recovery pipe
46: Pressure regulating valve 51: Vapor recovery device
52: Vapor adjustment valve 53: Vapor recovery control device
61: Vapor recovery device 62: Vapor recovery pipe
71: Vapor recovery device 72: Vapor recovery pipe
C1, C2: Coolant G: Fuel oil (gasoline)
L: Liquefied gasoline M: Mixed gasoline vapor
R: Residual Vapor V1 to V3: Fuel Oil Vapor (Gasoline Vapor)

Claims (7)

A first fuel oil vapor generated in the underground tank at the time of unloading the fuel oil and a vapor recovery mechanism for recovering both the second fuel oil vapor discharged from the vehicle tank by the fuel oil supplied by the oil supply mechanism of the oil supply apparatus Characterized by a vapor recovery device. The method according to claim 1,
A vent pipe into which one end is inserted into the underground tank and into which the first fuel oil vapor flows,
A vapor recovery pipe through which the second fuel oil vapor flows,
A connection pipe communicating the vent pipe and the vapor return pipe,
And a vapor suction pipe communicating with the connection pipe and sucking the first and second fuel oil vapor. The method according to claim 1,
A vent pipe into which one end is inserted into the underground tank and into which the first fuel oil vapor flows,
A plurality of vapor recovery tubes into which the second fuel oil vapor flows,
An age base portion individually connected to each of the plurality of vapor recovery tubes,
A connection pipe communicating the vent pipe with the respective bases,
And a vapor suction pipe communicating with the connection pipe and sucking the first and second fuel oil vapor. The method according to claim 1,
A vent pipe into which one end is inserted into the underground tank and into which the first fuel oil vapor flows,
A vapor recovery pipe to which the second fuel oil vapor flows and is connected to the underground tank,
And a vapor suction pipe communicating with the vent pipe and sucking the first and second fuel vapor. The method according to claim 2, 3, or 4,
A vapor suction pump that is opened to the suction pipe,
And a vapor suction motor capable of driving the vapor suction pump to control the number of revolutions. The method according to claim 2, 3, or 4,
And a vapor control valve which is opened in the suction pipe and is capable of controlling the opening amount in accordance with the amount of oil supplied to the vehicle mounting tank or the amount of fuel oil discharged into the underground tank by the oil supply mechanism of the oil supply device Vapor recovery device. 5. The method according to any one of claims 1 to 4,
An adsorption / desorption tower for adsorbing / desorbing the introduced fuel oil vapor and recovering the fuel oil vapor,
And a refrigerator for circulating the cooling liquid in the absorption / desorption tower.

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