KR102020475B1 - A Transfer System of Fuel Oil - Google Patents

Abstract

Provided is a fuel oil transfer system capable of suppressing generation of waste in consumption of fuel oil stored in a plurality of tanks.
The first auxiliary inlet pipe 10 is used in the transfer path for preheating the fuel oil storage tank 2B of the transfer destination using the fuel oil of the fuel oil settling tank 3, and the fuel oil storage tank of the transfer source ( The second auxiliary inflow pipe 100 and the bypass fuel flow path 101 are used in the transport path in which the fuel oil of 2A) is discharged from the transport pump 6 and transported toward the fuel oil storage tank 2B of the transport destination. When the fuel oil is transferred from the source to the fuel oil storage tank at the transfer destination, a portion of the fuel oil flowing through the second auxiliary inlet pipe 100 is returned to the transfer pump 6 through the first auxiliary inlet pipe 10. It is characterized by.

Description

A Transfer System of Fuel Oil

The present invention relates to a fuel oil transfer system, and more particularly, to a fuel oil transfer system for replacing fuel oil between fuel oil storage tanks.

The fuel oil used for boilers, such as a ship and a generator, is accommodated in a storage part, such as a tank, and is supplied to an internal combustion engine, etc., and is consumed. In addition to the fuel oil, the lubricating oil for the main unit such as an internal combustion engine is also accommodated in a storage unit such as a tank and used for use as the fuel oil.

The storage part of fuel oil and lubricating oil used for a ship may prepare several tanks according to the kind of property, a different storage amount, etc. (for example, patent document 1).

Patent Literature 1 discloses a configuration in which one of a plurality of tanks storing lubricating oils having different properties is selected when replenishing lubricating oil reduced by consumption in an internal combustion engine.

The properties are selected from other lubricants in order to prevent the lack of lubricants that cause deterioration of the operating situation in the internal combustion engine by supplying a lubricant suitable for the properties of the lubricant in the internal combustion engine.

Although the structure disclosed by patent document 1 differs from fuel oil, the concept is common with fuel oil in that it supplies from the several tank for the substance supplied in an internal combustion engine.

However, the configuration disclosed in Patent Literature 1 only presupposes selecting any one of a plurality of tanks, and does not consider transporting tanks between objects having the same properties as fuel oil.

For this reason, since a small amount of fuel oil remaining in the tank is left unconsumed, it is disadvantageous for energy saving to suppress waste of fuel consumption.

Patent Document 1: Japanese Patent Application Laid-Open No. 2015-86866

Then, the subject of this invention is providing the fuel oil conveyance system which can suppress that waste generate | occur | produces in the consumption of the fuel oil stored in several tank. In particular, it is an object of the present invention to provide a fuel oil transfer system capable of replacing fuel oils while preventing a rise in viscosity of the fuel oil and an increase in flow resistance when the plurality of tanks transfer fuel oils.

In order to solve this problem, the present invention heats the fuel oil transferred by the transfer pump from one of the plurality of fuel oil storage tanks by means of a fuel oil settling tank, and flows the heated fuel oil ( A fuel oil transfer system capable of partially raising the temperature of fuel oil in the fuel oil storage tank by returning to the fuel oil storage tank by a pump and mixing with the fuel oil in the fuel oil storage tank. When the fuel oil storage tank is used as the transfer source and the fuel oil storage tank at the transfer destination is other than this, the transfer from the fuel oil settling tank to the fuel oil storage tank at the transfer destination or from the fuel oil settling tank is performed. A first auxiliary inlet pipe capable of transferring fuel oil to the fuel oil suction side of the pump, and a fuel oil discharge side and the first auxiliary inlet pipe of the transfer pump; A second auxiliary inlet pipe communicating with the first auxiliary inlet pipe and a bypass fuel flow path capable of transferring fuel oil to the fuel oil storage tank of the transfer destination, wherein the second auxiliary inflow pipe communicates therewith; A transfer path for mixing the heated fuel oil of the fuel oil settling tank with the fuel oil of the fuel oil storage tank of the transfer destination using the first auxiliary inlet pipe when preheating the fuel oil; A feed path for introducing the fuel oil of the fuel oil storage tank of the transfer source into the fuel oil storage tank of the transfer destination is selectable by using an auxiliary inlet pipe and the bypass fuel flow path, and toward the fuel oil storage tank to the transfer destination. When the fuel oil is to be transferred, a part of the fuel oil of the transfer source is refluxed to the fuel oil introduction side of the transfer pump by using the first auxiliary inflow pipe.

According to the present invention, since the fuel oil in the fuel oil storage tank can be replaced, no fuel is left and no waste occurs in consumption. In particular, since the flow resistance of fuel oil can be suppressed at the time of replacement, smooth transfer can be performed easily.

BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic diagram which shows the structure of the fuel oil conveyance apparatus used for the fuel oil conveyance system which concerns on embodiment of this invention, and the flow of fuel oil at the time of fuel oil heating.
FIG. 2 is a schematic diagram showing the flow of fuel oil during fuel oil transfer performed in the fuel oil transfer apparatus shown in FIG. 1.
FIG. 3 is a block diagram for explaining the configuration of a control unit used in the fuel oil transfer device shown in FIG. 1.
FIG. 4 is a diagram for explaining a principle used for determining a predetermined condition performed by the control unit shown in FIG. 3.
FIG. 5: is a schematic diagram for demonstrating the structure of the fuel oil delivery system on the assumption of the structure shown in FIG.
FIG. 6: is a schematic diagram for demonstrating the conveyance state of the fuel oil made into the structure shown in FIG.

EMBODIMENT OF THE INVENTION Below, the form for implementing this invention is demonstrated.

1 is a configuration of a fuel oil transfer device 1 used in a fuel oil transfer system according to an embodiment of the present invention.

The fuel oil transfer device 1 includes a fuel oil settling tank 3 and a fuel oil service tank 4 that communicate with a plurality of fuel oil storage tanks 2 including a pair.

The fuel oil settling tank 3 is a tank used for heating fuel oil, and the fuel oil is heated at a temperature of 70 to 80 ° C as an example by a heater not shown.

The fuel oil storage tank 2 and the fuel oil settling tank 3 communicate with each other by a transfer pipe 5, in which a transfer pump 6, a temperature sensor 7, and a pressure sensor 8 are arranged. It is.

The temperature sensor 7 measures, for example, the temperature of the fuel oil inlet side and the so-called suction side of the transfer pump 6.

The pressure sensor 8 is provided in order to monitor the pressure change of the fuel oil sucked in the transfer pump 6. The pressure change is used to determine the change in flow resistance according to the change in viscosity of the fuel oil. In particular, when the viscosity increases and the flow resistance increases, the inlet pressure of the transfer pump 6 tends to be evacuated. Therefore, when the pressure change of the vacuum tendency is detected, heating to lower the viscosity of the fuel oil is necessary.

The fuel oil settling tank 3 is provided with a level sensor 9 for detecting a liquid level of fuel oil sucked by the transfer pump 6.

The level sensor 9 is a sensor capable of detecting a liquid level when a predetermined amount of fuel oil is introduced into the fuel oil settling tank 3. The level sensor 9 is used to stop the driving of the transfer pump 6 when it detects that a predetermined amount of fuel oil is introduced into the fuel oil settling tank 3.

The sensor is not limited to the above-described position, but is also provided inside the fuel oil storage tank 2 (see FIG. 5). These sensors LG1 and LG2 are residual amount sensors for sensing the residual amount of fuel oil in the fuel oil storage tank by level or pressure.

The fuel oil service tank 4 is a tank used for supplying fuel oil to the internal combustion engine or the like after temporarily storing the heated fuel oil. The fuel oil storage tank 2 and the fuel oil service tank 4 communicate with each other by the suction pipe 10, and a flow pump 11 is disposed in the middle. A part of the fuel oil stored in the fuel oil service tank 4 flows down to the fuel oil storage tank 2 by the dripping pump 11, and raises the temperature of the fuel oil in the fuel oil storage tank 2.

The name of the oil pump 11 in this case assumes that the fuel oil service tank 4 is arranged at a position higher than the fuel oil storage tank 2. In other words, the fuel oil service tank 4 is discharged from the upper fuel oil service tank 4 to the lower fuel oil storage tank 2 so as to flow the fuel oil so as to flow down.

In the structure shown in FIG. 1, the structure which the fuel oil settling tank 3 and the fuel oil service tank 4 communicated with the suction pipe 10, respectively is employ | adopted. Thus, the valve 12 is connected to the flow path of the fuel oil outlet of each of the tanks 3 and 4 so that the flow path of the heated fuel oil from both of these tanks 3 and 4 or from one tank to the fuel oil storage tank 2 can be set. Is installed.

The fuel oil transfer device 1 is a fuel oil after the fuel oil sucked into the fuel oil settling tank 3 from the fuel oil storage tank 2 by the transfer pump 6 is heated, and the heated fuel oil is cleaned. The fuel oil introduced into the service tank 4 and stored therein is provided for supply to the internal combustion engine or the like.

Part of the fuel oil temporarily stored in the fuel oil settling tank 3 and / or the fuel oil service tank 4 is returned to the fuel oil storage tank 2 by the dripping pump 11. As a result, the fuel oil in the fuel oil storage tank 2 is partially heated to 36 to 40 ° C by being mixed with the heated fuel oil.

In the present embodiment, as the operating time of the pumps, for example, the transfer pump 6 is selected for about 15 minutes, and the lower pump 11 is selected for about 45 minutes to operate alternately. During this time, the operation time of the transfer pump 6 can correspond to, for example, the time until the liquid level of the fuel oil is detected by the level sensor 9 in the fuel oil settling tank 3 described above. . That is, if the liquid level of the fuel oil is detected by the level sensor 9 within the operating time when the fuel oil flows at a flow rate based on the rotation speed of the transfer pump 6 and the driving current, the flow resistance of the fuel oil is generated. It can be judged that the viscosity of the fuel oil which is not used, and when the operation time is exceeded, it is judged that the fluidity is bad because the viscosity of the fuel oil is high. In addition, when the level sensor 9 detects that the fuel oil introduced into the fuel oil settling tank 3 reaches a predetermined amount, the operation of the transfer pump 6 is stopped to prevent the fuel oil from overflowing.

On the other hand, when there is no consumption of fuel oil such as during anchoring, the operation time of the transfer pump 6 is short, and the time until the level sensor 9 is operated is, for example, about 6 minutes.

Routes for sucking fuel oil from the fuel oil storage tank 2 toward the fuel oil settling tank 3 using the transfer pump 6 are indicated by reference numerals F1 to F5 in FIG. 1. A route through which fuel oil flows from the fuel oil service tank 4 toward the fuel oil storage tank 2 by using the oil pump 11 is shown by arrows F10 to F13 in FIG. 2.

The fuel oil transfer device 1 using such a configuration is disclosed in Japanese Laid-Open Patent Publication No. 2012-17123, the configuration of which is the main part of the applicant.

As the fuel oil transfer device 1 having the above configuration, a heating method for suppressing an increase in the flow resistance of the fuel oil is used.

Heating in this case means raising the temperature of fuel oil which is not heated by mixing heated fuel oil with fuel oil which is not heated.

Hereinafter, the heating method performed using the fuel oil feeder 1 will be described.

The fuel oil transfer device 1 can select either a normal operation mode which is executed when the viscosity of the fuel oil is low and the flow resistance is low and a heating operation mode which is executed when the viscosity is high and the flow resistance is increased. . In the normal operation mode, the transfer pump 6 which operates according to the operating state of the level sensor 9 and the flow pump 11 which supplies fuel oil into the fuel oil storage tank 2 are alternately operated to circulate the fuel oil. Mode. In the heating operation mode, the fuel oil is heated by the fuel oil returning to the fuel oil storage tank 2 while forcibly stopping the transfer pump 6 and then heating the fuel oil blocked at the suction side of the transfer pump 6. The fuel oil in the storage tank 2 is also a mode for heating. The heating operation mode is preferably executed until the viscosity of the fuel oil blocked on the transfer pump 6 side reaches a value which does not increase the flow resistance.

The following parameters are used as data as conditions for executing the heating operation mode.

That is, at least the temperature of the fuel oil sucked into the transfer pump 6, the pressure, and the operation time of the transfer pump 6 are used as parameters. Regarding the operation time of the transfer pump 6, as described above, the operation time until the level sensor 9 is operated or the time clock of the timer provided in the transfer pump 6 itself are referred to. If all, any one, or a plurality of these parameters meet predetermined conditions that require heating, the heating operation mode is executed.

Hereinafter, the structure and operation | movement for implementing this operation mode are demonstrated using FIG.

The transfer pump 6 and the oil pump 11 control the operation state by the control unit 20 shown in FIG. 3.

The control unit 20 is connected to the temperature sensor 7, the pressure sensor 8, and the level sensor 9 provided on the transfer pipe 5 on the input side. To the output side of the control part 20, the drive part of the transfer pump 6 and the drive part of the dripping pump 11 are connected, respectively. As for the transfer pump 6 and the oil pump 11, the type which can control a flow volume and a flow rate by rotating control of the motor (members shown by code | symbol M1, M2 in FIG. 1, 2) is used.

In Fig. 3, reference numeral 15 denotes an operation panel used, for example, to display the operating time of each pump 6, 11, the flow rate of fuel oil, or the like, and to input necessary conditions such as fuel consumption amount, return amount, and the like. , 16 is a timer.

The timer 16 measures, for example, the time required until the liquid level detection is performed by the level sensor 9 at the time when the transfer pump 6 starts to operate. Therefore, when the transfer pump 6 is operated and the operation time until the liquid level detection by the level sensor 9 becomes longer than necessary, it can be determined that the flow resistance is high due to the high viscosity. In other words, when the operation time of the transfer pump 6 becomes longer than necessary, it is possible to determine that the viscosity of the fuel oil flowing through the transfer pump 6 is high and the flow resistance is large. The transfer pump 6 may be equipped with the timer which measures an operation time in itself. In this case, it is possible to determine that the viscosity of the fuel oil is high and the flow resistance is high when the transfer pump 6 is operated for longer than the operation time set in advance in the self timer.

The transfer pump 6 is forcibly stopped when the preset operating time is exceeded, and is prepared for the heating operation mode described later.

Moreover, as a monitoring target item used for the predetermined condition which determines that the viscosity of fuel oil is a viscosity which increases a flow resistance, it can target the drive current value of the motor used for the drive source of the transfer pump 6.

The drive current value is determined in order to obtain the rotational speed and torque of the motor which is set in advance. When the rotational speed or the torque changes, the driving current value changes to return to the original state. In particular, the driving current value when the rotational speed or the torque decreases. Rises. Therefore, by monitoring the case where the drive current value rises, it is possible to determine that the viscosity of the fuel oil has risen, and the operation mode can be switched.

The normal operation mode selected by the control unit 20 circulates the fuel oil while keeping warm when the viscosity of the fuel oil is a value that does not increase the flow resistance. According to this operation mode, a state is maintained in which the temperature of the fuel oil stored in the fuel oil storage tank 2 is lowered to prevent the viscosity from increasing.

The control unit 20 in the normal operation mode is a temperature of the fuel oil introduced into the transfer pump 6, a pressure and an operating time of the transfer pump 6, and a drive current applied to a motor which is a driving source of the transfer pump 6. Monitor the change in value.

These monitoring target items are used as predetermined conditions which determine that the viscosity change of fuel oil, especially the viscosity rose, when the following four types of cases generate | occur | produce, for example.

(1) When the viscosity of fuel oil rises and reaches below the temperature at which the flow resistance increases.

(2) When the pressure change on the fuel oil introduction side of the transfer pump 6 is in a vacuum tendency occurrence state.

(3) When the operation time of the transfer pump 6 is extended until the level sensor 9 is activated.

(4) When the drive current value for the drive source of the transfer pump 6 is rising.

The normal operation mode is executed when these predetermined conditions are not satisfied and the viscosity increase of fuel oil does not occur.

When the normal operation mode is executed, a cycle of sucking fuel oil from the fuel oil storage tank 2 into the fuel oil settling tank 3 and a part of the fuel oil settling tank 3 and / or the fuel oil service tank 4 is performed. The cycle of dropping the fuel oil toward the fuel oil storage tank 2 is repeated alternately. However, even during the cycle, the transfer pump 6 is stopped in accordance with the operation of the level sensor 9. The operation state of each of the pumps 6 and 11 when the operation mode is executed is displayed on the operation panel 15.

When the normal operation mode is executed while the monitoring target item is continued, when all, one or more of the predetermined conditions derived by the monitored item match, the operation mode is switched from the normal operation mode to the heating operation mode. do.

In the heating operation mode, the transfer pump 6 is forcibly stopped, and the fuel oil heated by operating the flow pump 11 flows into the fuel oil storage tank 2. At this time, the heated fuel oil flows toward the fuel oil storage tank 2 while being mixed with fuel oil blocked on the fuel oil suction side of the transfer pump 6. When the fuel oil flows back to the filter (member indicated by FT in FIG. 2), for example, the fuel oil has a function of eliminating clogging of the filter.

In the control unit 20, the temperature and pressure can be directly monitored by a sensor among the monitoring target items. With respect to the operation time of the transfer pump 6 until the liquid level is detected using the level sensor 9, It is determined whether or not the heating operation mode is executed based on the state shown in FIG.

4, the vertical axis represents the amount of fuel oil (the amount by which the level sensor 9 operates), and the horizontal axis represents the time.

In FIG. 4, as the viscosity of fuel oil increases, the time until the level sensor 9 operates when the transfer pump 6 is set to a constant output becomes long.

Therefore, the fuel oil having a low viscosity is introduced into the fuel oil settling tank 3 and is extended longer than that time on the basis of the time until the level sensor 9 is operated (time indicated by symbol T in FIG. 4). In this case, it can be determined that the viscosity of the fuel oil is high at the time indicated by reference numeral T1 in FIG. 4. On the other hand, when the transfer pump 6 itself is equipped with a timer, it can be judged that the viscosity of the fuel oil is high when the actual operation time is extended by comparing the set time of the timer and the actual operation time.

When the heating operation mode is selected when all, some, or a plurality of predetermined conditions derived from the monitored item match, the heated fuel oil is transferred toward the fuel oil storage tank 2. Thereby, not only is it directly mixed with the fuel oil in the fuel oil storage tank 2, but it is also mixed with the fuel oil blocked at the suction side of the transfer pump 6, and can raise the temperature of fuel oil. As a result, the fuel oil is heated in the flow passage immediately before the fuel oil is sucked into the transfer pump 6, so that the viscosity of the fuel oil flowing into the transfer pump 6 can be ensured.

Normal operation when the change in temperature, pressure, operating time of the transfer pump, and the drive current value in the motor of the transfer pump reaches a condition that eliminates the increase in viscosity and does not match the predetermined condition Return to the mode.

The fuel oil transfer device 1 used in the above heating method is characterized in that the fuel oil transfer device 1 can be transported while suppressing an increase in the viscosity of the fuel oil and an increase in the flow resistance when the fuel oil from the plurality of tanks is replaced.

Hereinafter, the structure for obtaining such a characteristic is demonstrated.

FIG. 5 is a diagram in which the on / off valves used for setting the transfer path of fuel oil are designated for the configuration shown in FIG. 1 and a part of the configuration is added.

The difference between the configuration shown in FIG. 5 and the configuration shown in FIG. 1 is as follows.

That is, it is provided with the structure which replaces fuel oil in the relationship which directly connected both the fuel oil storage tank 2B of a transfer destination from the fuel oil storage tank 2A of the transfer source corresponded to one fuel oil storage tank, It is a point. Specifically, a part of the suction pipe 10 is used in addition to using the suction pipe 10 communicating with the fuel oil suction side of the transfer pump 6 from the fuel oil settling tank 3 shown in FIG. At the point using the second auxiliary inlet pipe 100 branched from.

The first auxiliary inlet pipe 10 constitutes a path for mixing the heated fuel oil discharged from the fuel oil settling tank 3 to the fuel oil suction side of the transfer pump 6, but the second auxiliary pump will be described later. It communicates with the bypass fuel flow path 101 which is continuous to an inflow pipe. The first auxiliary inflow pipe 10 transfers the heated fuel oil of the fuel oil settling tank 3 to the fuel oil storage tank of the transfer destination in order to heat the fuel oil in the fuel oil storage tank 2B of the transfer destination. It is possible to transfer toward 2B).

The second auxiliary inlet pipe 100 communicates between the fuel oil discharge side of the transfer pump 6 and the first auxiliary inlet pipe 10, and further branches to the first auxiliary inlet pipe 10 to feed the fuel oil at the transfer destination. The bypass fuel flow path 101 connected to the fuel oil introduction side of the storage tank 2B is provided. The second auxiliary inflow pipe 100 is used as a flow path for transferring the fuel oil discharged from the transfer pump 6 toward the bypass fuel flow path 101.

The bypass fuel flow path 101 is a flow path for conveying the fuel oil flowing through the second auxiliary inflow pipe 100 toward the fuel oil storage tank 2B at the transfer destination. Therefore, the 2nd auxiliary inflow pipe 100 and the bypass fuel flow path 101 directly transfer the fuel oil pulled up by the transfer pump 6 from the fuel oil storage tank 2A of a transfer source, and the fuel oil of a transfer destination. It is used when mixing on the fuel oil introduction side of the storage tank 2B.

The first auxiliary inflow pipe 10 is provided with a first flow pump 11 that replaces the flow pump 11, and the second auxiliary inflow pipe 100 is connected to the bypass fuel flow path 101 which communicates with this. The second flow pump 110 is installed.

In the bypass fuel flow path 101 communicating with the first auxiliary inflow pipe 10 and the second auxiliary inflow pipe 100, fuel oil can be heated on the fuel oil discharge side of the first and second flow pumps 11 and 110. The heaters 111.111H are provided.

On / off valves V1 to V8 for setting the transfer path of fuel oil in the transfer pipe 5, the suction pipe 10 used as the first auxiliary inflow pipe, the second auxiliary inflow pipe 100, and the bypass fuel flow path 101. ) Is arranged.

These on-off valves V1 to V8 are provided to the control unit 20 used for drive control of the transfer pump 6 and the drive motors M1, M2, M3 of the first and second flow pumps 11, 110. By this, the opening and closing state is controlled.

The control unit 20 sets the transfer path of the fuel oil when the fuel oil in the fuel oil storage tank 2A in use is replaced with the fuel oil storage tank 2B serving as another new transfer destination. In such a case, the replacement of the fuel oil storage tank 2A in use becomes less, or when the fuel oil storage tank 2A in use is unpredictable and needs to be replaced. Is executed.

The control unit 20 transfers the fuel oil to the fuel oil storage tank 2B of the transfer destination according to the remaining fuel amount detected by the remaining amount sensor LG1 of the fuel oil storage tank 2A corresponding to the transfer source that is being used at this stage. The process of replacing with is performed. When the fuel oil is replaced due to an unforeseen situation or the like, when the instruction is issued from the operation panel 15 side, the replacement operation is executed in the same manner as when the fuel oil is executed according to the remaining amount.

The transfer state of the fuel oil at the time of replacement is shown in FIG.

When replacing the fuel oil, in order to eliminate that the temperature of the fuel oil which reaches the fuel oil storage tank 2B of a transfer destination is low, as shown to Fig.6 (a), it heats from the fuel oil settling tank 3, The completed fuel oil is transferred to the fuel oil introduction side of the fuel oil storage tank 2B of the transfer destination. Such a transfer path of fuel oil can be used as a preheating flow path of fuel oil to the fuel oil storage tank 2B of a transfer destination. As a result, the viscosity rise of the fuel oil conveyed to the fuel oil storage tank 2B of a transfer destination is suppressed, and the state with little conveyance resistance is obtained. Therefore, this process is used as preparation for smoothly conveying fuel oil prior to conveyance.

When transferring the heated fuel oil from the fuel oil settling tank 3 toward the fuel oil storage tank 2B at the transfer destination, the control unit 20 opens the on / off valve V7 to set the transfer path. . The on-off valve 12 provided in the fuel oil settling tank 3 is also opened and fuel oil is conveyed.

Subsequently, when the temperature of the fuel oil in the fuel oil storage tank 2B of the transfer destination reaches the temperature which does not cause a viscosity rise by preheating or already, the fuel oil of the transfer destination from the fuel oil storage tank 2A of the transfer source. Fuel oil is conveyed toward the storage tank 2B.

For the transfer of fuel oil, the transfer path shown in Fig. 6B is used. That is, the second auxiliary inflow pipe 100 and the bypass fuel flow path 101 are used to transfer the fuel oil from the fuel oil storage tank 2A of the transfer source toward the fuel oil storage tank 2B of the transfer destination. do.

The heater 111H provided in the bypass fuel flow path 101 is heated and controlled in order to prevent the temperature of the fuel oil which flows here from becoming the temperature which raises a viscosity. Therefore, the fuel oil flowing through the bypass fuel flow path 101 can be prevented from becoming a temperature causing viscosity rise under the influence of heat radiation or ambient temperature, and can be transported without increasing the transfer resistance of the fuel oil.

In this embodiment, by using the structure which the 1st auxiliary inflow pipe 10 communicates with the 2nd auxiliary inflow pipe 100, as shown by the arrow of a thin line in FIG.6 (b), a bypass fuel flow path A portion of the fuel oil flowing through 101 can be classified into the first auxiliary inlet pipe 10.

The amount of fuel oil flowing through the first auxiliary inlet pipe 10 is, for example, about 30% less than the amount of fuel oil flowing toward the bypass fuel flow path 101 with respect to the total amount of fuel oil transferred by the transfer pump 6. Amount. Therefore, 70% of the fuel oil from the fuel oil storage tank 2A of the transfer source is transferred to the fuel oil storage tank 2B of the transfer destination, and an amount of 30% less than this amount is transferred to the transfer pump 6. ) Is transported to the fuel oil suction (introduction) side. As a result, the temperature drop which causes the viscosity rise of the fuel oil introduced into the transfer pump 6 is correct | amended, and the increase of the load of the transfer pump 6 is suppressed. The heater 111 provided in the 1st auxiliary inflow pipe 10 prevents the temperature of the flowing fuel oil from becoming the temperature which raises a viscosity similarly to the heater 111H provided in the bypass fuel flow path 101. In order to control the heating.

The control unit 20 opens and closes the valves V1, V3, V8, V7, and V6, V5 along the flow of fuel oil in order to set the conveying path shown in Fig. 6B.

Among the open / close valves, the open / close valves V5 and V6 provided in the first auxiliary inflow pipe 10 are the open / close valves V7 and V provided in the second auxiliary inflow pipe 100 and the bypass fuel flow path 101. The opening amount is small with respect to V8), and the flow path is narrowed. In particular, since the bypass fuel flow path 101 is narrower than the second auxiliary inflow pipe 100 by reducing the opening amount of the opening and closing valve V7 than the total opening of the opening and closing valve V8, the first auxiliary inflow pipe 100 Fuel oil can be conveyed toward the fuel cell. It is preferable that the opening amount of the on-off valve V7 is set to the amount from which the quantity of fuel oil in the above-mentioned 1st auxiliary inflow pipe 100 is obtained.

When the control unit 20 classifies a part of the fuel oil flowing through the second auxiliary inlet pipe 100 into the first auxiliary inlet pipe 10, a condition different from the above-described heating operation mode is used. That is, the heating operation mode is performed on the premise that the transfer pump 6 is forcibly stopped. The state shown in FIG. 6B assumes that the transfer pump 6 continues to operate. Doing. For this reason, it is important to keep the temperature of the fuel oil of the fuel oil suction (introduction) side of the transfer pump 6 at the temperature which does not cause a viscosity rise. Therefore, in this embodiment, the mixing rate of the fuel oil to the fuel oil suction (introduction) side of the transfer pump 6 is adjusted, and the temperature of fuel oil is prevented from falling.

According to the fuel oil conveyance system which concerns on the above embodiment, the temperature of the fuel oil introduce | transduced into the transfer pump 6 and the temperature of the fuel oil conveyed to the fuel oil storage tank of a transfer destination can be maintained at the temperature which a viscosity rise does not produce.

In particular, the transfer of fuel oil from the transfer source to the fuel oil storage tank at the transfer destination can be performed by communicating the fuel oil storage tanks with each other. Thereby, unlike the case where it supplies from the fuel oil settling tank 3 to the fuel oil storage tank 2B of a transfer destination, the reduction of fuel oil in the fuel oil settling tank 3 can be suppressed. In addition, since the preheated fuel oil or the heated fuel oil can be mixed in the transfer path between the communicating tanks to prevent the temperature of the fuel oil from lowering, it is possible to smoothly transfer the fuel oil while preventing the viscosity rise.

Since the fuel oil in a fuel oil storage tank can be replaced with a new fuel oil storage tank, this invention can be used without leaving the fuel oil in a fuel oil storage tank with a small amount remaining. Therefore, the availability is high in that the waste of fuel consumption can be eliminated.

In particular, since the fuel to be replaced is replaced by the communication between the tanks, the availability of the fuel can be reduced in that the fuel oil can be discharged from the fuel oil settling tank and the temperature can be reduced and replaced. high.

1: Fuel oil feeder used for fuel oil feed system
2: fuel oil storage tank
2A: fuel oil storage tank of transfer source
2B: Fuel oil storage tank at destination
3: fuel oil settling tank
5: transfer pipe
6: transfer pump
7: temperature sensor
8: pressure sensor
10: suction pipe used for the first auxiliary inlet pipe
11: Lower pump corresponding to the first lower pump
20: control unit
100: second auxiliary inlet pipe
101: bypass fuel euro
110: second oil pump
111, 111H: heater
LG1, LG2: Remaining Sensor
V1 ~ V8: On-off valve

Claims (3)

The fuel oil transferred by one of the plurality of fuel oil storage tanks by the transfer pump is heated by the fuel oil settling tank, and the heated fuel oil is returned to the fuel oil storage tank by the lowering pump to return the fuel oil storage tank. A fuel oil delivery system capable of partially raising the temperature of fuel oil in the fuel oil storage tank by mixing with fuel oil therein,
When said one fuel oil storage tank is used as a transfer source, and other than that is used as the fuel oil storage tank of a transfer destination,
A first auxiliary inlet pipe capable of transferring fuel oil from the fuel oil settling tank to a fuel oil storage tank of the transfer destination or transferring fuel oil from the fuel oil settling tank to the fuel oil suction side of the transfer pump; ;
A second auxiliary inlet pipe communicating between the fuel oil discharge side of the transfer pump and a first auxiliary inlet pipe;
A bypass fuel flow path branched from the first auxiliary inflow pipe and capable of transferring fuel oil to a fuel oil storage tank of the transfer destination; And
When the fuel oil of the fuel oil storage tank of the transfer destination is preheated, mixing the heated fuel oil of the fuel oil settling tank with the fuel oil of the fuel oil storage tank of the transfer destination by using the first auxiliary inlet pipe. A transfer path for introducing the fuel oil of the fuel oil storage tank of the transfer source into the fuel oil storage tank of the transfer destination by using a transfer path for the transfer path and the second auxiliary inlet pipe and the bypass fuel flow path; And a portion of the fuel oil of a transfer source is refluxed to the fuel oil introduction side of the transfer pump by using the first auxiliary inlet pipe when the fuel oil is transferred toward the fuel oil storage tank to the fuel tank. The method of claim 1,
A first flow pump is installed in the first auxiliary inflow pipe, and a second flow pump is installed in the second auxiliary inflow pipe, and a heater is installed at the fuel oil discharge side of the first and second flow pumps, respectively. Fuel oil transfer system. The method according to claim 1 or 2,
When the fuel oil is transferred from the fuel oil storage tank of the transfer source to the fuel oil transfer tank of the transfer destination, the amount of fuel oil flowing in the first auxiliary inlet pipe with respect to the amount of fuel oil flowing through the second auxiliary inflow pipe and the bypass fuel flow path. A fuel oil transfer system characterized by being able to set a small amount.

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