TWI670413B - Fuel oil transfer system - Google Patents

Abstract

[Problem] To provide a fuel oil transfer system capable of suppressing unnecessary waste of fuel oil stored in a plurality of tanks. [Technical Content] A fuel oil transfer system uses a first auxiliary inflow pipe (10) in a preheating transfer path of a fuel oil storage tank bucket (2B) to which a fuel oil is to be transferred using a fuel oil separation tank bucket 3, The fuel oil in the fuel oil storage tank barrel (2A) of the transfer origin is discharged from the transfer pump (6) toward the transfer destination. The fuel oil storage tank barrel (2B) is transferred using a second auxiliary inflow pipe ( 100) and the bypass fuel oil path (101), when transferring the fuel oil from the transfer origin fuel tank to the transfer destination fuel oil storage tank, a part of the fuel oil flowing through the second auxiliary inflow pipe (100) is passed through the first auxiliary The inflow pipe (10) returns to the transfer pump (6).

Description

Fuel oil transfer system

[0001] The present invention relates to a fuel oil transfer system. More specifically, the present invention relates to a fuel oil transfer system for transferring fuel oil between fuel oil storage tanks.

[0002] Fuel oil used in boilers such as ships and generators is stored in storage units such as tanks, and is consumed by being supplied to an internal combustion engine and the like. In addition, unlike fuel oil, lubricating oil targeted at a host engine such as an internal combustion engine engine is used in a storage portion such as a tank, as well as fuel oil.燃料 The storage sections for fuel oil and lubricating oil used in ships are cases where multiple tanks are prepared (for example, Patent Document 1), which have corresponding characteristics and different storage amounts.专利 Patent Document 1 discloses a configuration in which one of a plurality of tanks storing lubricating oils having different properties is selected when replenishing the lubricating oil reduced by being consumed by the internal combustion engine.选择 Lubricants with different characteristics are selected in order to prevent the shortage of lubricants that cause deterioration of the operating conditions in the internal combustion engine by supplying lubricants that are suitable for the internal lubrication of the internal combustion engine. [0003] Although the structure disclosed in Patent Document 1 is different from fuel oil, it is conceptually common to fuel oil in that a point supplied from a plurality of tanks as a target is a substance supplied to an internal combustion engine. However, the configuration disclosed in Patent Document 1 is based on the premise that any one of a plurality of tanks is selected, and transfer of objects having the same properties as the fuel oil from the tanks to each other is not considered. Therefore, since a small amount of fuel oil remaining in the tank is left unconsumed, the implementation of energy saving for suppressing unnecessary waste of fuel consumption becomes disadvantageous. [Prior Art Document] [Patent Document] [0004] [Patent Document 1] Japanese Patent Laid-Open No. 2015-86866

[Problems to be Solved by the Present Invention] [0005] An object of the present invention is to provide a fuel oil transfer system capable of suppressing unnecessary waste of fuel oil stored in a plurality of tanks. In particular, the present invention provides a fuel oil transfer system capable of exchanging fuel oil while preventing the viscosity of the fuel oil from increasing and increasing the flow resistance when the plurality of tanks are transferring fuel oil to each other. [Means to Solve the Problem] [0006] In order to solve the problem, the present invention is a fuel oil transfer system, which is a fuel oil transferred from one of a plurality of fuel oil storage tanks by a transfer pump through The fuel oil separation tank is heated. The fuel oil in the fuel oil storage tank is mixed with the fuel oil in the fuel oil storage tank by returning the heated fuel oil to the fuel oil storage tank by a pump. The temperature of the fuel oil can be partially increased, and the fuel oil storage tank can be used as a transfer origin and the fuel oil storage tank can be transferred from the fuel oil separation tank to the above The destination fuel oil storage tank or the first auxiliary inflow pipe for transferring fuel oil from the fuel oil separation tank to the fuel oil suction side of the transfer pump, and the fuel oil discharge side and the first auxiliary A second auxiliary inflow pipe communicating between the inflow pipes and a bypass fuel oil path that branches off from the first auxiliary inflow pipe and can transfer fuel oil to the fuel oil storage tank barrel of the transfer destination. Optional: When preheating the fuel oil in the fuel oil storage tank of the transfer destination, use the first auxiliary inflow pipe to separate the heated fuel oil in the fuel oil separation tank and the fuel oil storage tank of the transfer destination. The fuel oil mixing transfer path of the barrel, and the second auxiliary inflow pipe and the bypass fuel oil path are used to introduce the fuel oil of the fuel oil storage tank barrel of the transfer origin to the fuel oil storage tank barrel of the transfer destination. When the fuel oil is transferred toward the fuel oil storage tank barrel of the transfer destination, the first auxiliary inflow pipe is used to flow a part of the fuel oil at the origin to the fuel oil introduction side of the transfer pump. [Effects of the Invention] [0007] According to the present invention, since the fuel oil in the fuel oil storage tank can be replaced, there is no unnecessary consumption of residual fuel. In particular, since the flow resistance of the fuel oil can be suppressed during the replacement, the smooth replacement can be easily performed.

[0009] Hereinafter, embodiments for carrying out the present invention will be described. Fig. 1 shows a configuration of a fuel oil transfer device 1 used in a fuel oil transfer system according to an embodiment of the present invention. (2) The fuel oil transfer device 1 includes a fuel oil separation tank 3 and a fuel oil common tank 4 that communicate with a plurality of fuel oil storage tanks 2 including a pair. The fuel oil separation tank 3 is a tank used to heat the fuel oil, and the fuel oil is heated to a temperature of 70 to 80 ° C. by a heater (not shown). [0010] The fuel oil storage tank bucket 2 and the fuel oil separation tank bucket 3 are communicated via a transfer pipe 5. In the middle, a transfer pump 6, a temperature sensor 7, and a pressure sensor 8 are arranged. The radon temperature sensor 7 measures, for example, the temperature on the fuel fill port side, that is, the suction side of the transfer pump 6. The pressure sensor 8 is provided to monitor the pressure change of the fuel oil sucked into the transfer pump 6. The pressure change is used to determine a change in flow resistance corresponding to a change in the viscosity of the fuel oil. In particular, when the viscosity increases and the flow resistance increases, the pressure on the inlet side of the transfer pump 6 tends to become vacuum. Therefore, if a pressure change in the vacuum tendency is detected, heating for reducing the viscosity of the fuel oil becomes necessary.燃料 The fuel oil separation tank barrel 3 is provided with a liquid level sensor 9 for detecting the liquid level of the fuel oil sucked by the transfer pump 6. The liquid 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 separation tank 3. The liquid level sensor 9 is used to stop the driving of the transfer pump 6 when a predetermined amount of fuel oil is introduced into the fuel oil separation tank 3. The sensor is not limited to the above-mentioned position, and is also installed inside the fuel oil storage tank barrel 2 (refer to FIG. 5. The sensors LG1 and LG2 borrow the remaining fuel amount in the fuel oil storage tank barrel. Residual volume sensor detected by liquid level or pressure. [0011] The fuel oil common tank 4 is used for temporarily storing the fuel oil after it has been purified, and then supplies it to the internal combustion engine. The fuel oil storage tank 2 and the fuel oil common tank 4 are connected through a suction pipe 10, and a flow-down pump 11 is arranged in the middle. The fuel stored in the fuel oil common tank 4 A part of the oil is caused to flow down the fuel oil storage tank barrel 2 by the down-flow pump 11 to raise the temperature of the fuel oil in the fuel oil storage tank barrel 2. The reason for the name of the down-flow pump 11 in this case is to use a common fuel oil tank The premise is that the barrel 4 is disposed at a higher position than the fuel oil storage tank barrel 2. That is, the fuel oil is discharged from the upper fuel oil commonly used tank 4 toward the lower fuel oil storage tank 2 Meaning, and manifested as shed. [0012] In the configuration shown in FIG. 1, a configuration is adopted in which the fuel oil separation tank 3 and the fuel oil common tank 4 communicate with the suction pipe 10. Therefore, the tank 3, 4 or any one of the tanks faces the fuel oil storage tank 2. The fuel oil flow path of the heated fuel tank is provided with a valve 12 at the fuel tank outlet flow path of each tank 3, 4. 4 [0013] The above fuel oil transfer device 1 heats the fuel oil sucked from the fuel oil storage tank bucket 2 toward the fuel oil separation tank bucket 3 by the transfer pump 6, and the heated fuel oil is purified and introduced into the fuel oil. The conventional fuel tank 4 is supplied with the fuel oil stored in the internal combustion engine, etc. A part of the fuel oil temporarily stored in the fuel oil separation tank 3 or the fuel oil common tank 4 is passed through the pump 11 Then, it returns to the fuel oil storage tank barrel 2. As a result, the fuel oil in the fuel oil storage tank barrel 2 is partially heated to 36 to 40 ° C. by mixing with the heated fuel oil. [0014] In this implementation In the example, the operating time of the pumps is, for example, the transfer pump 6 is The 15-minute pump and the down-flow pump 11 are selected to operate alternately at 45-minute intervals. During this time, the operation time of the transfer pump 6 may correspond to, for example, the liquid in the tank 3 by the aforementioned fuel oil separation tank. The time until the liquid level of the fuel oil is detected by the position sensor 9. That is, the number of rotations of the transfer pump 6 allows the fuel oil to operate during the operating time when the fuel oil flows at a rated flow rate based on a driving current or the like. If the liquid level is detected by the liquid level sensor 9, it can be judged that the viscosity of the fuel oil will not be caused by the flow resistance of the fuel oil. When the operating time is exceeded, it can be judged that the viscosity of the fuel oil is high and the fluidity is poor. In addition, the liquid level sensor 9 detects that the fuel oil introduced into the fuel oil separation tank 3 reaches a predetermined amount, and stops the operation of the transfer pump 6 to prevent the fuel oil from overflowing. Also, there is no fuel oil in the park. When consumed, the operating time of the transfer pump 6 is shortened, and the time until the liquid level sensor 9 operates is, for example, approximately 6 minutes. [0015] The path for drawing fuel oil from the fuel oil storage tank barrel 2 toward the fuel oil separation tank barrel 3 using the transfer pump 6 is shown by symbols F1 to F5 in FIG. 1. The flow path of the fuel oil from the fuel oil tank 4 to the fuel oil storage tank 2 using the down pump 11 is shown by arrows F10 to F13 in FIG. 2. (2) The fuel oil transfer device 1 using such a configuration has been disclosed in the previous application of the present applicant, which is Japanese Patent Application Laid-Open No. 2012-17123. [0016] The fuel oil transfer device 1 having the above configuration is a heating method that uses an increase in the flow resistance of the fuel oil to suppress the increase.加热 Heating in this case means that the temperature of the unheated fuel oil is increased by mixing the heated fuel oil with the unheated fuel oil. Below, the heating method using the fuel oil transfer device will be described. [0017] The fuel oil transfer device 1 can be selected from a normal operation mode to be executed when the viscosity of the fuel oil is low and the flow resistance is small, and a heating operation to be executed when the viscosity is high and the flow resistance is increased. Any of the patterns. The normal operation mode is a mode in which the transfer pump 6 and the down-flow pump 11 for supplying fuel oil into the fuel oil storage tank 2 are operated alternately in response to the operating state of the liquid level sensor 9 to circulate the fuel oil. In the heating operation mode, in addition to forcibly stopping the transfer pump 6, the fuel oil intercepted on the suction side of the transfer pump 6 is heated, and the fuel oil is also stored by the fuel oil returned to the fuel oil storage tank 2. Heating mode of the fuel oil in the tank 2. The heating operation mode is preferably performed until the viscosity of the fuel oil intercepted on the side of the transfer pump 6 reaches a value that does not increase the flow resistance.的 For the conditions used to execute the heating operation mode, the following example parameters can be used as data. That is, the parameters are at least the temperature and pressure of the fuel oil sucked toward the transfer pump 6 and the operating time of the transfer pump 6. Regarding the operation time of the transfer pump 6, as described above, reference is made to the operation time until the liquid level sensor 9 operates, and the timing time of the timer provided in the transfer pump 6 itself. If all or any of these parameters are in accordance with the predetermined conditions necessary for heating, the heating operation mode is executed. [0018] Hereinafter, the configuration and function for implementing this operation mode will be described using FIG. 3. (2) The transfer pump 6 and the down-flow pump 11 are controlled in the operating state by the control unit 20 shown in FIG. 3. [0019] The control unit 20 connects the temperature sensor 7, the pressure sensor 8, and the liquid level sensor 9 provided on the transfer pipe 5 to the input side. The drive unit of the transfer pump 6 and the drive unit of the down pump 11 are connected to the output side of the control unit 20, respectively. The transfer pump 6 and the down-flow pump 11 both use a type in which the flow rate and the flow rate can be controlled by rotating the motor (the components shown by the symbols M1 and M2 in Figs. 1 and 2). [0020] In FIG. 3, reference numeral 15 is an operation panel used for displaying, for example, the operating time of each of the pumps 6, 11 and the flow rate of the fuel oil, etc., and inputting necessary conditions for further returning the fuel consumption amount and the like. The symbol 16 is a timer. The timer 16 measures, for example, the time required from the point when the operation of the transfer pump 6 is started to the time when the liquid level is detected by the liquid level sensor 9. Therefore, when the transfer pump 6 is running, the operating time until the liquid level detection by the liquid level sensor 9 is detected is too long, it can be judged that the viscosity is high and the flow resistance is large. In other words, when the operation time of the transfer pump 6 is excessively long, the viscosity of the fuel oil flowing in the transfer pump 6 is high, and it can be determined that the flow resistance is large. The transfer pump 6 may have its own timing for measuring the operation time. In this case, when the transfer pump 6 is operated for more than the operation time set in advance of its own timer, it can be determined that the fuel oil has a high viscosity and a high flow resistance. The transfer pump 6 is provided with a heating operation mode described later that is forcibly stopped when the preset operation time is exceeded. [0021] In addition, the monitoring target item used to determine the viscosity of the fuel oil is a predetermined condition for increasing the viscosity of the flow resistance, and the drive current value of the motor used for the drive source of the transfer pump 6 may be targeted. Although the drive current value is determined in order to obtain the preset number of rotations and torque of the motor, when the number of rotations and torque changes, the original state is changed, especially when the number of rotations and torque decreases. The drive current value increases. Here, the increase in the viscosity of the fuel oil can be determined by monitoring the increase in the driving current value, and the operation mode can be switched. [0022] The normal operation mode selected by the control unit 20 circulates the fuel oil while maintaining the viscosity of the fuel oil without increasing the value of the flow resistance. According to this operation mode, a state in which the temperature of the fuel oil stored in the fuel oil storage tank 2 is suppressed from decreasing and the viscosity is prevented from being increased is maintained. The control unit 20 in the normal operation mode monitors: the temperature and pressure of the fuel oil introduced into the transfer pump 6 and the operating time of the transfer pump 6 are further added to the drive source of the transfer pump 6, that is, the drive current value of the motor Variety. These monitoring items are used as a predetermined condition for determining the viscosity change of the fuel oil, especially the viscosity increase, when the following four types of cases occur. (1) The case where the viscosity of the fuel oil increases and reaches a temperature below the temperature at which the flow resistance increases. (2) The pressure change on the fuel oil introduction side of the transfer pump 6 may be a state in which a tendency to vacuum occurs. (3) The operation time of the transfer pump 6 until the liquid level sensor 9 is operated is increased. (4) In the case where the drive current value of the drive source of the transfer pump 6 is increased.通常 If these conditions are not met and the increase in the viscosity of the fuel oil does not occur, the normal operation mode is implemented. During the execution of the normal operation mode, the cycle of sucking fuel oil from the fuel oil storage tank 2 to the fuel oil separation tank 3 and the fuel oil separation tank 3 and a part of the fuel oil common tank 4 are alternately repeated. Circulation of the fuel oil flowing down towards the fuel oil storage tank barrel 2. However, even in the middle of the cycle, the transfer pump 6 may be stopped in response to the operation of the liquid level sensor 9. The operation states of the pumps 6 and 11 when this operation mode is executed are displayed on the operation panel 15. [0023] When the monitoring of the monitoring target item is continued, and when the normal operation mode is performed, when all or any of the predetermined conditions of the monitoring target item match, the normal operation mode is switched to the heating operation mode. . [0024] In the heating operation mode, the transfer pump 6 is forcibly stopped, and the down-flow pump 11 is operated to cause the heated fuel oil to flow toward 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 the fuel oil intercepted on the fuel oil suction side of the transfer pump 6. The fuel oil is, for example, a filter (a member shown by the symbol FT in FIG. 2) flows countercurrently and functions to resolve the filter clogging. [0025] In the control unit 20, although the temperature and pressure in the monitoring target items can be directly monitored by a sensor, the operation of the transfer pump 6 until the liquid level is detected using the liquid level sensor 9 is related. The time is based on the state shown in Fig. 4 to determine whether or not to execute the heating operation mode.第 In Fig. 4, the vertical axis indicates the amount of fuel oil (the amount of operation of the liquid level sensor 9), and the horizontal axis indicates the time. In the same figure, as the viscosity of the fuel oil becomes higher, the time required for the liquid level sensor 9 to operate becomes longer when the transfer pump 6 has a constant output. Therefore, based on the time (the time shown by the symbol T in FIG. 4) until the fuel oil having a relatively low viscosity is introduced into the fuel oil separation tank 3 and the liquid level sensor 9 is actuated, the time is longer than this time. When it grows up (the time shown by the symbol T1 in FIG. 4), it can be determined that the viscosity of the fuel oil is high. In addition, in the case where the transfer pump 6 itself is provided with a timer, it can be determined that the viscosity of the fuel oil is high when the set time of the timer is compared with the actual operation time, and the actual operation time is increased. [0026] When all, a part, or a plurality of predetermined conditions of the monitoring target items are consistent, if the heating operation mode is selected, the heated fuel oil is sent toward the fuel oil storage tank 2. Accordingly, not only the fuel oil is directly mixed with the fuel oil in the fuel oil storage tank 2, but also the fuel oil intercepted on the suction side of the transfer pump 6 is also mixed, and the temperature of the fuel oil can be increased. As a result, since the fuel oil is heated in the oil passage immediately before the fuel oil is sucked into the transfer pump 6, it is possible to ensure that the viscosity of the fuel oil flowing into the transfer pump 6 decreases. [0027] The monitoring target items, that is, the temperature, pressure, and operating time of the transfer pump, are further changed when the drive current value of the transfer pump motor reaches a condition for dissolving the viscosity rise, and when the conditions do not agree with the predetermined conditions, it returns to normal. Operation mode. [0028] A feature of the fuel oil transfer device 1 using the above heating method is that the fuel oil can be transferred while suppressing an increase in the viscosity of the fuel oil and an increase in flow resistance when the fuel oil is transferred from a plurality of tanks. The configuration for obtaining this feature will be described below. [0029] FIG. 5 is a diagram in which a part of the configuration is added to the on-off valve used to set the fuel oil transfer path using the configuration shown in FIG. 1 as a target. The difference between the structure shown in FIG. 5 and the structure shown in FIG. 1 is as follows. That is, a point is provided in which the fuel oil is transferred from a fuel oil storage tank bucket 2A corresponding to the origin of the transfer of one fuel oil storage tank, and the fuel oil storage tank bucket 2B of the transfer destination is directly connected. . Specifically, the suction pipe 10 communicating from the fuel oil separation tank barrel 3 shown in FIG. 1 to the fuel oil suction side of the transfer pump 6 is used as a first auxiliary inflow pipe and a part of the suction pipe 10 is divided. Point of the second auxiliary inflow pipe 100. [0030] Although the first auxiliary inflow pipe 10 constitutes a path for mixing the heated fuel oil discharged from the fuel oil separation tank 3 toward the fuel oil suction side of the transfer pump 6, it is combined with a second auxiliary inflow described later The pipe is continuously connected to the fuel oil path 101. The first auxiliary inflow pipe 10 is for heating the fuel oil in the fuel oil storage tank barrel 2B of the transfer destination, and can heat the heated fuel oil in the fuel oil separation tank 3 toward the fuel oil storage tank barrel of the transfer destination. 2B transfer path. [0031] The second auxiliary inflow pipe 100 communicates between the fuel oil discharge side of the transfer pump 6 and the first auxiliary inflow pipe 10, and is further provided with fuel oil that is divergent from the first auxiliary inflow pipe 10 and from the transfer destination. The bypass fuel oil passage 101 connected to the fuel oil introduction side of the storage tank barrel 2B. 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 oil path 101. The bypass fuel oil passage 101 is an oil passage for transferring the fuel oil flowing through the second auxiliary inflow pipe 100 toward the fuel oil storage tank barrel 2B to be transferred. Therefore, the second auxiliary inflow pipe 100 and the bypass fuel oil path 101 are the fuel oil drawn up from the fuel oil storage tank barrel 2A of the transfer origin by the transfer pump 6 directly to the fuel oil storage tank of the transfer destination. It is used when the fuel oil introduction side of the barrel 2B is mixed. The first auxiliary inflow pipe 10 is provided with a first down pump 11 which replaces the down pump 11, and the second auxiliary inflow pipe 100 is provided with a bypass fuel oil path 101 and a second down pump 110 which communicate with the first down pump 110. In the bypass fuel oil passage 101 communicating with the first auxiliary inflow pipe 10 and the second auxiliary inflow pipe 100, a heater capable of heating the fuel oil is provided on the fuel oil discharge side of the first and second down pumps 11, 110. 111, 111H. [0032] In the suction pipe 10 used as the transfer pipe 5, the first auxiliary inflow pipe, the second auxiliary inflow pipe 100, and the bypass fuel oil passage 101, on-off valves V1 to V8 for setting a fuel oil transfer path are arranged. . The on-off valves V1 to V8 are controlled to be opened and closed by a control unit 20 used for driving control of the drive motors M1, M2, and M3 of the transfer pump 6 and the first and second down pumps 11 and 110. [0033] The control unit 20 sets the fuel oil transfer path when the fuel oil in the fuel oil storage tank bucket 2A in use is switched to the fuel oil storage tank bucket 2B which is another new transfer destination. The replacement in this case is a case where the remaining amount of the fuel oil storage tank bucket 2A in use is small, or a situation where an unexpected situation occurs during the use of the fuel oil storage tank bucket 2A and the necessary replacement is required. Subject is implemented. The control unit 20 responds to the fuel remaining amount detected by the remaining amount sensor LG1 of the fuel oil storage tank barrel 2A which is currently in use and corresponds to the origin of the transfer. Treatment of oil storage tank barrel 2B. When the fuel oil is changed due to an unexpected situation or the like, if the command is issued from the operation panel 15 side, the changeover operation is performed in the same manner as in the case where the corresponding residual amount is executed. [0034] The transfer state of the fuel oil during the replacement is shown in FIG. 6. When the fuel oil is exchanged, in order to dissolve the temperature of the fuel oil reaching the fuel oil storage tank barrel 2B at the transfer destination, as shown in FIG. 6 (A), the fuel oil is separated from the tank barrel 3 to complete the heating. The fuel oil is transferred toward the fuel oil introduction side of the fuel oil storage tank barrel 2B of the transfer destination. This fuel oil transfer path is a preheating oil path that can be used as a fuel oil storage tank barrel 2B for transferring fuel oil to a transfer destination. As a result, it is possible to obtain a state in which the viscosity increase of the fuel oil to be transferred toward the fuel oil storage tank 2B to be transferred is suppressed, and the transfer resistance is small. Therefore, this process is used as preparation for smooth transfer of fuel oil before transfer. When the heated fuel oil is transferred from the fuel oil separation tank 3 to the transfer destination fuel oil storage tank 2B, the control unit 20 opens the on-off valve V7 to set the transfer path. Similarly, the on-off valve 12 provided in the fuel oil separation tank barrel 3 is opened to transfer fuel oil. [0035] Next, when the temperature of the fuel oil in the fuel oil storage tank barrel 2B of the transfer destination is preheated or has reached a temperature that does not cause viscosity rise, the fuel oil storage tank barrel 2A from the place of origin is transferred. The fuel oil storage tank 2B toward the transfer destination causes the fuel oil to be transferred. For the transfer of fuel oil, use the transfer path shown in Figure 6 (B). That is, the second auxiliary inflow pipe 100 and the bypass fuel oil path 101 are used so that the fuel oil can be transferred from the fuel oil storage tank bucket 2A of the transfer origin to the fuel oil storage tank bucket 2B of the transfer destination. The heater 111H provided in the bypass fuel oil path 101 is heated and controlled in order to prevent the temperature of the fuel oil flowing therefrom from becoming a temperature that causes viscosity to rise. Therefore, it is possible to prevent the temperature of the fuel oil from increasing due to the heat of the fuel oil flowing through the detoured fuel oil path 101 and the surrounding temperature, so that the fuel oil can be transferred without increasing its resistance. [0036] In this embodiment, by using a configuration in which the first auxiliary inflow pipe 10 and the second auxiliary inflow pipe 100 are communicated with each other, as shown by a thin arrow in FIG. A part of the fuel oil in the path 101 is branched toward the first auxiliary inflow pipe 10. The amount of the fuel oil flowing through the first auxiliary inflow pipe 10 is smaller than the amount of the fuel oil flowing toward the bypass fuel oil path 101 with respect to the entire amount of the fuel oil transferred by the transfer pump 6, for example, an amount of about 30% . Therefore, 70% of the fuel oil from the fuel oil storage tank barrel 2A of the transfer origin is transferred toward the fuel oil storage tank barrel 2B of the transfer destination, and 30% less than this amount is directed toward the transfer pump 6 The fuel oil suction (introduction) side is transferred. As a result, the temperature drop that causes the viscosity of the fuel oil introduced into the transfer pump 6 to rise is corrected, and an increase in the load on the transfer pump 6 is suppressed. The heater 111 provided in the first auxiliary inflow pipe 10 is heated and controlled in order to prevent the temperature of the flowing fuel oil from becoming a temperature that causes the viscosity to rise, similarly to the heater 111H provided in the bypass fuel oil path 101. . [0037] The control unit 20 opens the on-off valves V1, V3, V8, V7, and V6, V5 in order to set the transfer path shown in FIG. 6 (B) along the flow of the fuel oil. Among the on-off valves, the on-off valves V5 and V6 provided in the first auxiliary inflow pipe 10 reduce the opening amount of the on-off valves V7 and V8 provided in the second auxiliary inflow pipe 100 and the bypass fuel oil path 101. Throttle the oil circuit. In particular, since the opening amount of the on-off valve V7 is reduced more than the full opening of the on-off valve V8, the bypass fuel oil path 101 is more throttled than the second auxiliary inflow pipe 100, so the fuel oil can be transferred toward the first auxiliary inflow pipe 100. . The opening amount of the on-off valve V7 is preferably set to an amount that can obtain the amount of fuel oil in the first auxiliary inflow pipe 100 described above. The knuckle control unit 20 uses a condition different from the aforementioned heating operation mode when a part of the fuel oil flowing through the second auxiliary inflow pipe 100 is branched toward the first auxiliary inflow pipe 10. That is, the heating operation mode is performed on the premise that the transfer pump 6 is forcibly stopped, but the state shown in FIG. 6 (B) is based on the premise that the operation of the transfer pump 6 is continued. Therefore, it is important that the temperature of the fuel oil on the fuel oil suction (introduction) side of the transfer pump 6 is maintained at a temperature that does not cause an increase in viscosity. Here, in this embodiment, the mixing ratio of the fuel oil toward the fuel oil suction (introduction) side of the transfer pump 6 is adjusted to prevent the temperature of the fuel oil from decreasing. [0038] According to the fuel oil transfer system of the above embodiment, the temperature of the fuel oil introduced into the transfer pump 6 and the temperature of the fuel oil transferred to the fuel oil storage tank barrel at the transfer destination can be maintained at a viscosity that does not increase. What will happen to the temperature. In particular, the transfer of fuel oil from the fuel oil storage tank barrel to the transfer destination can be performed by connecting the fuel oil storage tank barrel to each other. Accordingly, unlike the case where the fuel oil storage tank bucket 2B is supplied from the fuel oil separation tank bucket 3 to the transfer destination, the fuel oil separation tank bucket 3 can suppress a decrease in fuel oil. In addition, since the pre-heated fuel oil or the heated fuel oil can be mixed in the transfer path between the connected tanks to prevent the temperature of the fuel oil from falling, the fuel oil can be smoothly transferred while preventing the viscosity from rising. [Industrial Applicability] [0039] The present invention allows the fuel oil in the fuel oil storage tank to be replaced with a new fuel oil storage tank, so it does not allow the fuel oil storage tank with a small amount of residue. The fuel oil is placed inside and can be used. Thereby, there is no unnecessary waste of fuel consumption, and the availability is high. In particular, since the fuel to be replaced is exchanged through the communication between the tanks, the amount of fuel oil discharged from the fuel oil separation tank can be suppressed, and the temperature of the transferred fuel oil can be suppressed from decreasing. The point of change is high.

[0040]

Fuel oil transfer device used in 1‧‧‧ fuel oil transfer system

2‧‧‧ fuel oil storage tank barrel

2A‧‧‧ barrels of fuel oil storage tanks of origin

2B‧‧‧ Fuel tanks for transfer destination

3‧‧‧ fuel oil separation tank

4‧‧‧Fuel oil tanks

5‧‧‧ transfer tube

6‧‧‧ transfer pump

7‧‧‧ temperature sensor

8‧‧‧ Pressure Sensor

10‧‧‧ Suction tube for the first auxiliary inflow tube

11‧‧‧ equivalent to the first downflow pump

20‧‧‧Control Department

100‧‧‧ 2nd auxiliary inflow pipe

101‧‧‧ detour fuel oil road

110‧‧‧Second flow pump

111, 111H‧‧‧ heater

LG1, LG2‧‧‧Residual sensor

V1 ～ V8‧‧‧Open and close valve

[0008] [FIG. 1] A schematic diagram showing a configuration of a fuel oil transfer device used in a fuel oil transfer system according to an embodiment of the present invention and a flow of fuel oil when the fuel oil is heated. [Fig. 2] A schematic diagram showing the flow of fuel oil during fuel transfer by the fuel oil transfer device shown in Fig. 1. [Figure 3] A block diagram for explaining the configuration of a control unit used in the fuel oil transfer device shown in Figure 1.第 [Fig. 4] A line diagram for explaining the principle used for determining a predetermined condition implemented by the control unit shown in Fig. 3. [FIG. 5] A schematic diagram for explaining the configuration of a fuel oil transfer system based on the configuration shown in FIG. [Fig. 6] A schematic diagram for explaining the transfer state of the fuel oil having the configuration shown in Fig. 5 as a target.

Claims (3)

A fuel oil transfer system is one in which fuel oil transferred from a plurality of fuel oil storage tanks by a transfer pump is heated by a fuel oil separation tank, and the fuel oil that has been heated by flowing down The pump returns to the fuel oil storage tank and the fuel oil in the fuel oil storage tank mixes the fuel oil in the fuel oil storage tank to partially increase the temperature. The fuel oil storage tank is provided with: From the origin of the transfer, when the fuel oil storage tanks other than the transfer destination are moved from the fuel oil separation tank to the fuel oil storage tank or the fuel oil separation tank, The first auxiliary inflow pipe for transferring fuel oil on the fuel oil suction side of the pump, and the second auxiliary inflow pipe communicating with the fuel oil discharge side and the first auxiliary inflow pipe of the transfer pump, and the first auxiliary inflow pipe. The divergent fuel oil circuit that can transfer fuel oil to the fuel oil storage tank barrel of the transfer destination can be selected: when the fuel oil of the fuel oil storage tank barrel of the transfer destination is preheated Using the first auxiliary inflow pipe to transfer the heated fuel oil in the fuel oil separation tank and the fuel oil in the fuel oil storage tank in the transfer destination, and using the second auxiliary inflow pipe and the When the fuel oil path is detoured and the fuel oil from the fuel oil storage tank barrel at the origin is transferred to the fuel oil storage tank barrel at the transfer destination, and the fuel oil is transferred toward the fuel oil storage tank barrel at the transfer destination Using the first auxiliary inflow pipe, a part of the fuel oil to be transferred is returned to the fuel oil introduction side of the transfer pump. For example, the fuel oil transfer system in the first scope of the patent application, wherein the first auxiliary inflow pipe is provided with a first down pump, the second auxiliary inflow pipe is provided with a second down pump, and the first, second, and second pumps are provided. Heaters are provided on the fuel oil discharge side of the down pump. For example, if the fuel oil transfer system according to item 1 or 2 of the scope of patent application is for transferring fuel oil from the fuel oil storage tank barrel of the transfer origin to the fuel oil transfer tank barrel of the transfer destination, the fuel oil flowing in the second auxiliary The amount of fuel oil flowing into the inflow pipe and the bypass fuel oil passage can be set to reduce the amount of fuel oil flowing through the first auxiliary inflow pipe.