KR20160012058A

KR20160012058A - Vapor collecting device

Info

Publication number: KR20160012058A
Application number: KR1020140135574A
Authority: KR
Inventors: 카츠히코 세키야; 카즈유키 카리노
Original assignee: 가부시끼가이샤 다쓰노
Priority date: 2014-07-23
Filing date: 2014-10-08
Publication date: 2016-02-02
Also published as: KR101606038B1; JP6347253B2; TWI629091B; TW201603874A; CN106660778A; WO2016013128A1; JPWO2016013128A1

Abstract

The present invention relates to a vapor recovery device (1) for preventing erroneous suction of fuel oil and preventing breakage of the vapor recovery device, which is provided in a vapor recovery line (6), one end of which is connected to the underground tank (2) A condenser 15 connected to the downstream side of the compression pump 14 for condensing the fuel oil vapor and a condenser 15 for condensing the fuel oil vapor in the underground tank 2, A float switch 11 installed on the upstream side of the compression pump 14 for detecting the fuel oil flowing through the vapor recovery line 6, And the float switch 11 detects the inflow of the fuel oil when the float 11c is raised to a predetermined position by the fuel oil in the casing 11a.

Description

Vapor collecting device

The present invention relates to a vapor recovery apparatus for recovering fuel oil vapor (vaporized fuel oil) staying in an underground tank when transferring fuel oil from a tank lorry to an underground tank.

Generally, since the volatility of fuel oil such as gasoline is high, when the fuel oil is unloaded from the tank lorry into the underground tank buried in the gas station, the fuel oil vapor (steam) formed by evaporation of the fuel oil in the underground tank stays. Conventionally, such a fuel oil vapor is discharged into the atmosphere through a vent pipe connected to an underground tank.

However, if the fuel oil vapor is directly discharged to the atmosphere, resources are wastefully wasted and environmental pollution is caused by the fuel oil vapor discharged into the atmosphere. Further, there is a fear of fire due to the printing of the fuel oil vapor discharged into the atmosphere .

In order to solve such a problem, the present applicant has proposed a vapor recovery apparatus for liquefying and reusing a fuel vapor in Patent Documents 1 and 2. The oil supply device disclosed in Patent Document 1 is provided with a condensing device for liquefying the fuel oil vapor in the device itself and recovering the liquefied gasoline and an adsorption and desorption device for adsorbing and desorbing gasoline components from the gasoline vapor that can not be recovered from the condensing device It is possible to efficiently recover the liquefied gasoline.

On the other hand, the fuel supply device disclosed in Patent Document 2 is configured to recover the fuel oil vapor through the vapor recovery pipe installed close to the oil supply nozzle, cool the vapor using the cooling and adsorption device, Gas, gasoline, and water.

[Patent Document 1] JP-A-2006-198604 [Patent Document 2] JP-A-2014-19474

However, the invention described in the above Patent Documents 1 and 2 has an effective function. However, in the case of additionally installing a vapor recovery device in an already installed gas station, it is not necessary to collect the fuel vapor directly in the oil supply device, And once collected in the buried underground tank, the fuel oil vapor is sucked from the underground tank by the vapor recovery device.

At this time, the vapor recovery device recovers the fuel oil vapor in the underground tank through the pipe by using the compression pump, but overflow occurs when supplying the fuel oil equal to or more than the capacity of the underground tank at the time of unloading, , When the fuel oil is excessively injected into the underground tank due to a cause, the vapor recovery device may suck the fuel oil.

Here, since the compression pump installed in the apparatus is dedicated to vapor (evaporation gas), there is a problem that when the vapor recovery apparatus sucks fuel oil, the compression pump is damaged.

Accordingly, the present invention has been made in view of the above problems in the prior art, and an object of the present invention is to provide a vapor recovery apparatus capable of preventing erroneous suction of fuel oil and protecting a compression pump and the like.

In order to attain the above object, the present invention provides a fuel cell system comprising: a suction unit installed on a channel connected to an underground tank at one end thereof for sucking an internal fuel oil vapor of the underground tank; A liquid detecting means provided on an upstream side of the suction means for detecting a fuel oil flowing in through the pipe; and a condensing means for condensing the fuel oil in the underground tank, And valve opening / closing means for opening and closing the valve in response to the detection result of the liquid detecting means.

According to the present invention, since the liquid detecting means is provided on the upstream side of the suction means such as the compression pump and the valve is opened and closed by the valve opening / closing means in response to the detection result of the liquid detecting means, It is possible to detect the incorporation of the fuel oil before being sucked on the back, and it becomes possible to prevent breakage of the compression pump and the like.

In the above-mentioned vapor recovery device, the liquid detecting means includes a float which ascends and descends according to the level of the fuel oil in the casing, a first conduit connected to the casing and introducing the fuel oil vapor and / or the fuel oil, And a second conduit connected to the valve opening / closing means and connected to the first conduit at the same time when the float is lifted to a predetermined position by the fuel oil in the casing, Do. Thereby, even when the fuel oil is mixed, it is possible to prevent the outflow of the fuel oil to the downstream side of the fuel oil.

In the above-mentioned vapor recovery apparatus, the liquid detecting means may be provided with a drain cock for discharging the fuel oil in the casing to the bottom surface of the casing.

According to the present invention as described above, it is possible to prevent erroneous suction of the fuel oil and protect the apparatus such as the compression pump.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view showing an example of the entire configuration of a gas filling station including a form of an embodiment of a vapor recovery device according to the present invention, including a schematic enlarged portion of a vapor recovery device. Fig.
2 is a schematic diagram showing an example of the configuration of a float switch.
Fig. 3 is a flowchart for explaining the flow of processing by the vapor recovery device when the flow rate pulse can be obtained from the meter. Fig.
Fig. 4 is a flowchart for explaining the flow of processing by the vapor recovery apparatus when the flow rate pulse can not be acquired by the meter. Fig.

Next, embodiments for carrying out the present invention will be described in detail with reference to the drawings.

As shown in Fig. 1, a plurality of islands 4, 4, ... are provided in a gas station 10, and meters 3, 3, ... are installed in each of the islands 4. A vending machine 1 according to the present invention is provided in a predetermined island 4. The underground tank 2 is buried under the gas station 10 and the meters 3 and the vapor collecting apparatus 1 on the respective islands 4 are connected by various pipes. A vent pipe 8 extending to the ground is also connected to the underground tank 2. The vent pipe 8 opens the valve when the pressure in the air layer of the underground tank 2 becomes equal to or higher than a predetermined pressure A vent valve (not shown) is provided.

The meter (3) is connected to the underground tank (2) through a vapor pipe line (5). A gasoline vapor (vaporized gasoline) as a fuel oil vapor generated when fuel oil gasoline is refueled to a vehicle or the like is collected in each of the meters 3 by using a blower pump 3a installed in each meter 3, (The layer in which the gas remains) of the underground tank 2 through the passage 5.

The vapor recovery device 1 is connected to the underground tank through the vapor recovery line 6 and the liquid recovery line 7 and is connected to a gasoline vapor existing in the base layer of the underground tank 2 via the vapor recovery line 6 And is separated into liquefied gasoline and air (air), and the liquefied gasoline is returned to the liquid layer portion (region where the liquid remains) of the underground tank 2 through the liquid recovery line 7.

Specifically, the vapor recovery apparatus 1 is roughly divided into a float switch 11, a shutoff valve (electromagnet valve) 12, a compression pump 14, a condenser 15, a gas / liquid separation tank 16, 20 and a vacuum pump 21.

In the vapor recovery line 6, the underground tank 2 is connected to one end and the float switch 11 is connected to the other end. The float switch 11 is connected to the vapor recovery line 6 on the upstream side and to the shutoff valve 12 on the downstream side. The float switch 11 detects the incorporation of the gasoline liquid into the gasoline vapor which is sucked and recovered through the vapor recovery line 6.

The shutoff valve 12 is connected to the float switch 11 on the upstream side and to the shutoff valve 13 on the downstream side. The shutoff valve 12 is, for example, an electromagnet valve. The float switch 11 opens and closes the valve in response to the detection result of the gasoline liquid. The shutoff valve 12 is normally opened when the apparatus is in operation and closed when the float switch 11 mixes a predetermined amount of gasoline.

2, the float switch 11 includes a float 11c provided in a rod 11b in the casing 11a and a lower limit stopper 11d for detecting a lower limit of the gasoline liquid in the casing 11a An upper stopper 11e for detecting an upper limit amount of the gasoline liquid in the casing 11a, a vapor suction port 11f provided on the side surface of the casing 11a for suctioning gasoline vapor, A vapor outlet port 11g which is disposed on the side surface of the casing 11a to discharge the gasoline vapor and guides the gasoline vapor to the shutoff valve 12 and a gas outlet 11g provided on the bottom surface of the casing 11a, A gasoline liquid outlet port 11h for discharging the gasoline liquid in one casing 11a to the outside and a drain cock 11i for controlling the discharge of the gasoline liquid from the gasoline liquid outlet port 11h.

The gasoline liquid is mixed in the vapor inlet 11f and the level of the gasoline liquid in the casing 11a rises, so that the float 11c rises. When the float 11c is connected to the upper limit stopper 11e, it detects the mixture of the gasoline liquid. Thereby, the float switch 11 is turned on, and the shutoff valve 11 is closed.

The float 11c opens the drain cock 11i and discharges the gasoline liquid in the casing 11a to the outside to lower the position to the lower limit stopper 11d. As a result, the float switch 11 is released from the ON state, and the shutoff valve 12 can be opened. In order to open the shutoff valve 12, it is necessary to reset the vapor recovery device 1, for example.

Returning to Fig. 1 for explanation. The shutoff valve 13 is connected to a shutoff valve 12 on one side of the upstream side and a vacuum pump 21 on the upstream side of the other side and a compression pump 14 on the downstream side.

The compression pump 14 sucks and recovers the gasoline vapor through the vapor recovery line 6 and discharges the gasoline vapor that has been sucked and recovered to the condenser 15 described later. The condenser 15 extracts the liquefied gasoline and water by cooling and condensing the gasoline vapor discharged from the compression pump 14.

When the gasoline vapor is liquefied, for example, it can be performed by using an external cooling means, or by circulating the gasoline itself. In addition, a portion of the gasoline vapor is not liquefied and remains as residual vapor. The liquefied gasoline, water, air, and residual vapor extracted by the condenser 15 are led to the air-liquid separation tank 16.

The air-liquid separator tank 16 separates the liquefied gasoline, water, air, and remaining vapor from the condenser 15 to separate the liquefied gasoline and water by their specific gravity, The vapor is guided to the high concentration apparatus 20 to be described later.

The liquefied gasoline stored in the gas-liquid separation tank 16 is guided to the liquid recovery line 7 through the liquid recovery valve 17 and discharged to the underground tank 2 when stored in a predetermined amount. When the water stored in the gas-liquid separation tank 16 is stored by a predetermined amount, the water is guided to the water recovery line 9 through the water recovery valve 18 and discharged to the outside.

The switching valve 19 has a gas-liquid separation tank 16 connected to the first upstream side, a high concentration device 20 connected to the second upstream side and the first downstream side, and a vacuum pump 21 are connected. The switching valve 19 guides the air and the residual vapor that has been guided to the first upstream side in the gas-liquid separation tank 16 to the high concentration apparatus 20 through the first upstream side.

The high concentration apparatus 20 discharges the remaining vapor to a high concentration. The residual vapor discharged from the high concentration apparatus 20 is guided to the vacuum pump 21 through the second upstream side and the second downstream side of the switching valve 19. [ Further, the high concentration device 20 adjusts the pressure of the air through the pressure regulating valve 22 to release air into the atmosphere.

In the vacuum pump 21, a switching valve 19 is connected to one end and a switching valve 13 is connected to the other end. The vacuum pump 21 sucks the residual vaporized high-concentration vapor and discharges it to the switching valve 13 side.

Next, the operation of the float switch 11 for detecting the incorporation of the gasoline liquid into the gasoline vapor will be described with reference to Fig. First, in normal operation, the float switch 11 is in the OFF state and the shutoff valve 12 is in the open state. In this state, when the gasoline vapor in which the gasoline liquid is mixed is sucked and injected into the casing 11a through the vapor inlet 11f, the gasoline vapor is discharged through the vapor outlet 11g, while the mixed gasoline liquid flows into the casing 11a.

The float 11c rises in response to the level of the gasoline liquid in the casing 11a. When the float 11c reaches the position of the upper limit stopper 11e and comes into contact with the upper limit stopper 11e, the float switch 11 is turned on, whereby the shutoff valve 12 is instantly closed, The operation of the recovery apparatus 1 is stopped.

Here, in the float switch 11, even when gasoline liquid is mixed into the gasoline vapor so that the vapor outlet 11g for discharging the gasoline vapor is positioned above the vapor inlet 11f, the gasoline liquid flows into the vapor outlet 11g. Therefore, it is possible to prevent the inflow of the gasoline liquid to the rear end of the float switch 11, and it is possible to prevent the breakage of the compression pump 14.

When the vapor recovery device 1 is stopped, the drain cock 11i is operated to discharge the gasoline liquid in the casing 11a through the gasoline liquid discharge port 11h, and the float 11c is moved to the upper limit stopper 11e. It is possible to recover the vapor recovery device 1 by releasing the float switch 11 from the ON state and resetting the vapor recovery device 1. [

Next, the operation of mixing the gasoline liquid when recovering and liquefying the gasoline vapor in the vapor collecting apparatus 1 will be described with reference to Figs. 3 and 4. Fig.

First, the flow of processing by the vapor recovery apparatus 1 when the flow rate pulse can be obtained from the meter 3 will be described with reference to Fig. In the vapor recovery apparatus 1, when the gasoline vapor is sucked and collected, the fuel supply state of the meter 3 is determined. In this example, the fuel supply state is determined based on the flow rate pulse acquired by the meter 3.

In step S1, the presence or absence of a flow rate pulse is determined. When the flow pulse is generated (step S1: YES), the compression pump 14 and the vacuum pump 21 are turned ON, and the suction of the gasoline vapor is performed (step S2). On the other hand, if no flow pulse has been generated (step S1: NO), the series of processing ends.

In step S3, it is judged whether the float switch 11 is ON or not. When the gasoline liquid in the casing 11a reaches a predetermined amount and the float switch 11 is determined to be ON (step S3: YES), the shutoff valve 12 is closed and the compression pump 14 and the vacuum pump 21 are closed, Is turned OFF to stop the suction of the gasoline vapor (step S4). On the other hand, when it is determined that the float switch 11 is OFF (step S3: NO), the process returns to step S1.

In step S5, it is judged whether the float switch 11 is OFF or not. When it is determined that the float switch 11 is OFF (step S5: YES), a reset process for the vapor recovery device 1 is performed. Thereby, the vapor recovery apparatus 1 is initialized and the float switch 11 is turned on. On the other hand, if it is determined that the float switch 11 is ON (step S5: NO), the processing of step S5 is repeated until the float switch 11 is turned OFF.

Next, the flow of processing by the vapor recovery apparatus 1 when the flow rate pulse can not be obtained by the meter 3 will be described with reference to Fig. In this example, the vaary return device 1 judges the lubrication state based on a signal indicating the state of the oil supply pump that can be acquired by the meter 3.

In step S11, it is determined whether or not the oil feed pump is ON. When it is determined that the oil feed pump is ON (step S11: YES), the compression pump 14 and the vacuum pump 21 are turned ON, and the gasoline vapor is sucked and collected (step S12). On the other hand, if it is determined that the oil feed pump is not ON (step S11: NO), the series of processes ends.

In step S13, it is determined whether or not the float switch 11 is ON. When the gasoline liquid in the casing 11a reaches the predetermined amount and the float switch 11 is determined to be ON (step S13: YES), the shutoff valve 12 is closed and the compression pump 14 and the vacuum pump 21 are closed, Is turned OFF, and the suction of the gasoline vapor is stopped (step S14). On the other hand, when it is determined that the float switch 11 is OFF (step S13: NO), the process returns to step S11.

In step S15, it is determined whether or not the float switch 11 is OFF. When it is determined that the float switch 11 is OFF (step S15: YES), a reset process for the vapor recovery device 1 is performed. Thereby, the vapor recovery apparatus 1 is initialized and the float switch 11 is turned on. On the other hand, if it is determined that the float switch 11 is ON (step S15: NO), the process of step S15 is repeated until the float switch 11 is turned OFF.

As described above, according to the embodiment of the present invention, when the introduction of the gasoline liquid into the gasoline vapor is detected at the front end of the compression pump and the amount of the mixed gasoline reaches a predetermined amount, the shutoff valve is closed to stop the operation of the apparatus Therefore, it is possible to prevent the inflow of the gasoline liquid into the apparatus and to prevent the breakage of the compression pump by the gasoline liquid.

1: Vapor recovery device 2: Underground tank
3: Meter 3a: Blower pump
4: Ireland 5: Vapor tubing
6: Vapor recovery line 7: Liquid recovery line
8: vent pipe 9: water recovery line
10: gas station 11: float switch
11a: casing 11b: rod (stem)
11c: Float 11d: Lower limit stopper
11e: Upper limit stopper 11f: Vapor suction
11g: Vapor outlet 11h: Gasoline liquid outlet
11i: Drain cock 12: Shutoff valve
13: switching valve 14: compression pump
15: condenser 16:
17: liquid recovery valve 18: water recovery valve
19: Switching valve 20: High concentration device
21: Vacuum pump 22: Pressure regulating valve

Claims

And a condensing means connected to a downstream side of the suction means for condensing the fuel vapor, wherein the condensing means is provided in the underground tank, 1. A vapor recovery device for recovering fuel vapor in an internal combustion engine,
And a valve opening / closing means for opening / closing the valve in response to a detection result of the liquid detecting means. Recovery device.

The liquid container according to claim 1,
A float which moves up and down in response to the liquid position of the fuel oil in the casing,
A first conduit connected to the casing for introducing the fuel oil vapor or the fuel oil,
And a second conduit connected to the casing and disposed above the first conduit and connected to the valve opening / closing means,
And detects the inflow of the fuel oil when the float is raised to a predetermined position by the fuel oil in the casing.

3. The vapor recovery apparatus according to claim 2, wherein the liquid detecting means has a drain cock for discharging fuel oil in the casing on the bottom surface of the casing.