TW201835442A - Fuel oil delivering system characterized by remaining the temperature of fuel oil flowing in delivering pump to prevent the viscosity and delivering resistance from raising by selecting the operating status of the delivering pump and down-flowing pump - Google Patents

Abstract

To provides a fuel oil delivering system which can suppress the consumption of the fuel oil stored in a plurality of tanks from occurrence of unnecessary waste. A fuel oil delivering system heats the delivered fuel oil which is in the fuel oil separating tank (3) and is from one of a plurality of fuel oil storing tanks (2A) and fuel oil storing tanks (2B), delivers the heated fuel oil back to the fuel oil storing tank, mixes with the fuel oil in the fuel oil storing tank to allow the temperature of the fuel oil in the fuel oil storing tank to be partially increased, and uses the decreases of the temperature and/or the inflow pressure of the fuel oil guided into the delivering pump (6) or the abnormal increase of the driving electric power to forcibly stop the delivering pump (6). It can choose: the treatment of getting the heated oil to flow toward the fuel oil-guiding side of the delivering pump (6) while getting the down-flowing pump (11) to operate; or the treatment of getting the down-flowing pump (11) to operate while getting the delivering pump (6) to operate.

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.部 The storage sections for fuel oil and lubricating oil used by ships are cases where multiple tanks are prepared (for example, Patent Document 1) in accordance with the types of properties 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. [Known Technical Literature] [Patent Literature] [0004] [Patent Literature 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 separation tank for preventing fuel oil from being used for heating the fuel oil. Preheating can prevent an increase in the transfer resistance of the fuel oil transfer system caused by an increase in the viscosity of the fuel oil. [Means to Solve the Problem] [0006] In order to solve this problem, the fuel oil transfer system of the present invention is a fuel oil transferred by a transfer pump from one of a plurality of fuel oil storage tanks through a fuel oil. The separation tank is heated, and the fuel oil that has been heated is returned to the fuel oil storage tank by a down pump, and the fuel in the fuel oil storage tank is mixed with the fuel oil in the fuel oil storage tank to fuel the fuel in the fuel oil storage tank. The temperature of the oil can be increased locally, and can be selected when the transfer pump is forcibly stopped due to the temperature of the fuel oil introduced into the transfer pump and either a drop in the inflow pressure or an abnormal increase in the power for driving the pump. : A process of flowing the heated fuel oil toward the fuel oil introduction side of the transfer pump while operating the down-flow pump, and a process of operating the down-flow pump while operating the transfer pump. [Effects of the Invention] [0007] According to the present invention, when the transfer pump is forcibly stopped, the heated fuel oil is flowed toward the fuel oil introduction side of the transfer pump, and the viscosity of the fuel oil introduced into the transfer pump can be achieved. Decline and decrease in transfer resistance. In particular, when the pump is forced to be stopped, the down pump can be operated at the same time as the operation of the transfer pump, the temperature of the fuel oil flowing through the transfer pump can be maintained at a viscosity increase and transfer resistance will not increase. Resulting temperature.

[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 temperature sensor 7 detects the temperature of the fuel oil moving in the transfer pipe 5, and measures the temperature of the fuel fill port side, that is, the suction side, of the transfer pump 6, for example. 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 becomes negative pressure and tends to become vacuum. Therefore, if the magnitude of the negative pressure detected when the vacuum tendency is reached is greater than a predetermined value, 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 thallium 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 are residual sensors that detect the remaining amount of fuel in the barrel of the fuel oil storage tank based on the liquid level or pressure. [0011] The common fuel tank 4 is a fuel tank that is used to supply fuel oil to the internal combustion engine to temporarily store the fuel oil after being heated and purify it. The fuel oil storage tank bucket 2 and the fuel oil common tank bucket 4 are communicated through a suction pipe 10, and a flow-down pump 11 is arranged in the middle. A part of the fuel oil stored in the fuel oil common tank 4 is the fuel oil stored in the fuel oil storage tank 2 flowing down the fuel oil storage tank 2 by a pump 11 that spit out the fuel oil little by little. The temperature increases. The reason for the name of the down-flow pump 11 in this case is the premise of a configuration in which the fuel oil common tank 4 is disposed at a higher position than the fuel oil storage tank 2. That is, it is because the fuel oil is spouted from the fuel tank 4 which is a higher level to the fuel tank 2 which is lower than the lower level, and appears to flow down. [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, respectively. Therefore, the fuel oil in each of the tanks 3 and 4 can be set so that the flow path of the heated fuel oil from the tanks 3 and 4 or any of the tanks to the fuel oil storage tank 2 can be set. The outlet flow path is provided with a valve 12. [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 purified. The fuel oil is usually introduced into the tank 4 and the stored fuel oil is supplied to the internal combustion engine or the like. A part of the fuel oil temporarily stored in the fuel oil separation tank 3 and the fuel oil common tank 4 is returned to the fuel oil storage tank 2 by flowing down the 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. [0014] In this embodiment, the operating time of the pumps with each other, for example, the transfer pump 6 is approximately 15 minutes and the down-flow pump 11 is approximately 45 minutes are selectively operated alternately. Among these times, the operating time of the transfer pump 6 is, for example, the time until the liquid level of the fuel oil can be detected by the liquid level sensor 9 in the fuel oil separation tank 3 described above. . That is, the number of rotations of the transfer pump 6 can be determined as fuel if the liquid level of the fuel oil is detected by the liquid level sensor 9 during the operating time when the fuel oil flows according to a rated flow rate such as a drive current. The viscosity of the fuel oil does not occur due to the resistance to the flow of the oil. When the operating time is exceeded, it can be determined 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. In addition, when no fuel oil is consumed during parking, the operating time of the transfer pump 6 is shortened, and the time until the liquid level sensor 9 operates is, for example, about 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 that is intercepted on the fuel oil suction side of the transfer pump 6 is heated, and the fuel is also returned to the fuel oil in the fuel oil storage tank 2 by the fuel oil. Heating mode of fuel oil in the oil storage 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 examples can be used. 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 is a case where the tendency to vacuumization 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 mixing with the fuel oil intercepted at this position via the fuel oil introduction 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 until fuel oil with a lower viscosity is introduced into the fuel oil separation tank 3 until the liquid level sensor 9 is actuated (the time shown by the symbol T in FIG. 4), it 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 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] The fuel oil transfer device 1 using the above heating method is forcibly stopping the transfer pump when transferring the fuel oil stored in the fuel oil storage tank barrel of the transfer destination to the fuel oil separation tank barrel. Processing has characteristics. In particular, the point of the fuel oil transfer processing at the time of forced stop of the transfer pump and after the forced stop can be selected. That is, the transfer pump is forcibly stopped when the temperature of the fuel oil and the suction pressure on the suction side satisfy the aforementioned predetermined conditions. Therefore, the fuel oil separation tank barrel 3 is not performed: heating of the fuel oil sent from the fuel oil storage tank barrel 2B, which is the object of temperature management, and replenishment for maintaining the amount of fuel. Here, when the transfer pump 6 is forcibly stopped, the aforementioned heating operation mode is executed, and the heated fuel oil is transferred from the fuel oil separation tank 3 to the fuel suction side of the transfer pump 6 (refer to FIG. 2). As a result, the temperature of the fuel oil on the fuel suction side including the fuel oil storage tank bucket 2 is increased. On the other hand, after the transfer pump 6 is forcibly stopped, in order to reduce the forcible stop of the transfer pump 6, the down-flow pump 11 is also operated at the same time as the transfer pump 6 is operated, so that the heated fuel oil and the fuel oil of the transfer pump 6 are introduced. Side mixing. As a result, since the viscosity of the fuel oil suction side of the transfer pump 6 is increased to avoid the transfer resistance of the fuel oil, the forced stop of the transfer pump 6 is suppressed, and the fuel can be supplied to the fuel oil separation tank 3 during the refueling period. The transfer of oil can continue. Hereinafter, a configuration for obtaining the above features will be described. [0029] FIG. 5 is a view in which symbols are added to the on-off valves used to set the fuel oil transfer path to the configuration shown in FIG. 1.的 On the transfer pipe 5 and the suction pipe 10, on-off valves V1 to V6 for setting the transfer direction of the fuel oil are arranged. The on-off valves V1 to V6 are controlled by the control unit 20 used for the drive control of the drive motors M1 and M2 of the transfer pump 6 and the down pump 11. [0030] The control unit 20 is a case where the amount of fuel oil that can be transferred to the fuel oil storage tank barrel 2B of the transfer destination is satisfied, and the temperature of the fuel oil is a temperature that does not increase the resistance to transfer of the fuel oil. At this time, the fuel oil storage tank barrel 2B to be transferred may be temperature-controlled while the heated fuel oil is still flowing. The fuel oil stored in the fuel oil storage tank barrel 2B of the transfer destination is transferred to the fuel oil separation tank barrel 3 by being heated by the transfer path shown in FIG. 1. When temperature management is performed, the on-off valves V2, V3, and V4 shown in FIG. 5 are opened by the control unit 20 to direct the fuel oil from the fuel oil storage tank 2B of the transfer destination toward the fuel oil separation tank 3 The sent place is heated. The fuel oil heated in the fuel oil separation tank bucket 3 is circulated toward the transfer destination fuel oil storage tank bucket 2B by the control unit 20 controlling the down pump 11 and the on-off valves V6, V5, V3, and V2. Thereby, the fuel oil in the fuel oil storage tank 2B of the transfer destination is locally heated to maintain the viscosity without causing transfer resistance. [0031] However, when the temperature of the fuel oil attracted toward the transfer pump 6 is equal to or lower than a predetermined value, the pressure on the inflow side becomes a tendency of vacuumization, and the driving electric power on the motor side for driving the pump reaches a predetermined value. When the above rises, the transfer pump 6 is forcibly stopped. When the transfer pump 6 is forcibly stopped, the control unit 20 switches to the heating operation mode set to the transfer path shown in FIG. 2. In order to set the transfer path when the heating operation mode is performed, the control unit 20 opens the on-off valves V6, V5, V3, and V2 along the flow of the fuel oil flowing from the fuel oil separation tank 3. As a result, the viscosity increase of the fuel oil on the fuel oil suction (introduction) side of the transfer pump 6 is eliminated and the transfer resistance is reduced, so the transfer pump 6 can be started again. When the transfer pump 6 is restarted, the temperature management of the fuel oil stored in the fuel oil storage tank barrel 2B of the transfer destination can be continued. [0032] On the other hand, after the transfer pump 6 is forcibly stopped and the heating operation mode is implemented, it is a process of selecting to run the down pump simultaneously with the operation of the transfer pump 6. The reasons for choosing this treatment are as follows. That is, it is prevented that when the transfer pump 6 is stopped, the pumping of the fuel oil to the fuel oil separation tank 3 is interrupted, and the fuel oil that is the temperature management target, that is, the fuel oil storage tank 2B is insufficient and cannot be heated. In other words, the temperature of the fuel oil flowing into the transfer pump 6 is maintained at a temperature that does not cause an increase in viscosity and an increase in transfer resistance. The fuel oil flowing into the transfer pump 6 is affected by the length of the transfer pipe 5 and the surrounding temperature, and the temperature changes when it is discharged from the fuel oil storage tank 2B. Here, it is expected that the forced stop of the transfer pump will frequently occur by appropriately adjusting the temperature of the fuel oil flowing into the transfer pump 6. [0033] In the present embodiment, after the forced stop of the transfer pump is initially performed, the transfer pump 6 is re-operated by the heating operation mode and the temperature of the fuel oil flowing into the transfer pump 6 is operated by operating the down-flow pump 11 Appropriate. FIG. 6 is a diagram showing a state when the transfer pump 6 is re-operated and the down pump is operated after the heating operation mode is executed. FIG. 6 (A) shows that the transfer pump 6 operates while the fuel oil is drawn from the fuel oil storage tank bucket 2B while the down pump 11 is operated and the fuel oil separation tank 3 moves the heated fuel oil toward the transfer pump 6 The state where the fuel oil introduction side is being transferred. In this embodiment, the fuel oil transferred from the downflow pump 11 is mixed with the fuel oil transferred from the fuel oil storage tank 2B in an amount of about 30% of the total amount of the fuel oil transferred by the transfer pump 6. . Therefore, 70% of the fuel oil from the fuel oil storage tank barrel 2B is transferred toward the fuel oil separation tank barrel 3, and 30% less than this amount is transferred toward the transfer pump 6, which is used in the fuel oil heating. 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 can be suppressed. [0034] FIG. 6 (B) is a diagram showing the operation state of the down-flow pump 11 after the transfer pump 6 is stopped by the change in the amount of oil in the fuel-oil separation tank 3. In FIG. 6 (B), when the temperature of the fuel oil pumped toward the transfer pump 6, the change in the suction pressure of the transfer pump 6, and the driving power of the transfer pump 6 are abnormally increased, the fuel oil is directed to the fuel oil until then The transfer pump 6 with which the separation tank 3 is pumped up is forcibly stopped (time T1). If the transfer pump 6 is forcibly stopped, the fuel oil that has been heated is returned from the fuel oil separation tank 3 by the pump 11 in the heating operation mode to the fuel in the transfer pump 6 including the fuel oil storage tank 2B. Oil suction (introduction) side. As a result, the fuel in the fuel oil separation tank 3 is reduced (time points T1 to T2). (2) After the heating of the fuel oil, the fuel oil on the suction (introduction) side of the transfer pump 6 is heated so that the properties of the fuel oil suitable for the operation of the transfer pump 6 can be obtained, and the transfer pump 6 is then operated again. When the transfer pump 6 is operated again, the fuel oil is drawn up from the fuel oil storage tank bucket 2B toward the fuel oil separation tank bucket 3, and the amount of oil in the fuel oil separation tank bucket 3 increases (time points T2 to T3). (1) When the forced stop of the transfer pump 6 is the first case, the amount of fuel oil after the heating of the down pump 11 used in the heating operation mode is larger than the supply amount before the stop. In FIG. 6 (B), when the transfer pump 6 is first stopped and the fuel pump supply amount of the down-flow pump 11 in the heating operation mode which is subsequently executed is larger than the supply amount before the stop, the change is caused by the equivalent oil amount Different degrees (θ) are displayed (θ1 <θ2). (1) After the transfer pump 6 is forcibly stopped initially, if the transfer pump 6 is operated again, the down pump 11 is operated at the same time. Thereby, in the fuel oil suction (introduction) side of the transfer pump 6, the fuel oil after heating is mixed, and the fuel oil is heated. If the fuel oil attracted to the transfer pump 6 decreases due to heat release and ambient temperature, the transfer pump 6 is stopped, but at this time, the heating operation mode can be selected to re-run the transfer pump 6. [0035] If the heated fuel oil is returned from the fuel oil separation tank 3 toward the fuel oil storage tank 2B, the amount of fuel oil in the fuel oil separation tank 3 is reduced, so that it cannot be heated. At this time, it is necessary to replenish the fuel oil remaining in the fuel storage tank barrel 2A where the transfer originated. The replenishment of the fuel oil to the fuel oil separation tank barrel 3 is different from the fuel oil storage tank barrel 2B at the transfer destination, where the heated fuel oil is returned from the fuel oil separation tank barrel 3 by the down-flow pump 11. The fuel oil storage transfers the fuel oil in the fuel oil storage tank barrel 2A of the origin. In this embodiment, when the fuel oil is drawn up from the fuel oil storage tank barrel 2A of the origin of the transfer by the transfer pump 6, the same conditions as those shown in FIG. 6 (A) are followed, and Operation of the transfer pump 6 causes the down-flow pump 11 to be operated at the same time. As a result, even if the temperature of the fuel oil sucked up due to the influence of heat generation and ambient temperature becomes low, the fuel oil that has been heated up from the downflow pump 11 is mixed, so that it is possible to reduce the drawdown toward the transfer pump 6. The temperature of the fuel oil dropped. The replenishment of fuel oil from the fuel oil storage tank barrel 2A of the transfer origin to the fuel oil separation tank barrel 3 is shown in FIG. 6 (B) as "refill from the origin of transfer". [0036] The heating operation mode is set to an optimum temperature corresponding to the fuel oil that can dissipate an increase in transfer resistance caused by an increase in the viscosity of the fuel oil, and a fuel oil that is pumped toward the transfer pump 6 at the current stage. The temperature difference between the supply amount of the fuel oil from the down-flow pump 11 and the temperature of the heated fuel oil that can dissolve the temperature difference is preferably. This makes it possible to quickly dissolve the difference between the optimum temperature and the actual temperature. [0037] According to the fuel oil transfer system of the above embodiment, when the transfer pump is forcibly stopped, the fuel oil can be preheated using the heating operation mode, and the down pump can be operated at the same time as the transfer pump is operated. Treatment of fuel oil preheating. Accordingly, it is possible to suppress the stoppage of the transfer pump from causing the fuel oil to be unable to be pumped toward the fuel oil separation tank, thereby preventing the heating of the fuel oil. [Industrial Applicability] 00 [0038] In the present invention, when the transfer pump used to heat the fuel oil at the transfer destination is stopped forcibly, of course, it includes the fuel oil from the fuel oil when it is restarted after the stop. The separation tank is a point where the heated fuel oil is mixed with the fuel oil, so that the transferability of the fuel oil is almost never deteriorated, and the availability is high.

[0039]

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

9‧‧‧ level sensor

10‧‧‧ Suction tube

11‧‧‧ flow down pump

12‧‧‧ Valve

15‧‧‧ operation panel

16‧‧‧ timing

20‧‧‧Control Department

LG1, LG2‧‧‧Residual sensor

V1 ～ V6‧‧‧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. [Fig. 4] A line diagram for explaining the principle used for the determination of a predetermined condition implemented by the control unit as shown in Fig. 3. [Fig. 5] A schematic diagram showing the components of the fuel oil transfer system based on the premise of the constitution shown in Fig. 1 with symbols. [Fig. 6] A diagram for explaining the effects obtained by the configuration shown in Fig. 5.

Claims (5)

A fuel oil transfer system is a kind of fuel oil that is transferred from one of a plurality of fuel oil storage tanks by a transfer pump and is heated by a fuel oil separation tank. The heated fuel oil is returned by a down-flow pump By mixing the fuel oil storage tank with the fuel oil in the fuel oil storage tank, the temperature of the fuel oil in the fuel oil storage tank can be locally increased, and the fuel introduced into the transfer pump can be locally When the temperature of the oil and the inflow pressure drop or the abnormal increase of the driving power forces the transfer pump to be stopped, you can choose to run the downflow pump to the fuel oil introduction side of the transfer pump while it is running, and the heating will be completed. A process of flowing fuel oil and a process of operating a transfer pump and operating the aforementioned down pump. For example, the fuel oil transfer system according to the first patent application range, wherein the process of turning the down pump simultaneously with the operation of the transfer pump is performed after the transfer pump is forcibly stopped. For example, the fuel oil transfer system according to item 1 or 2 of the patent application scope, wherein: (1) The transfer path for transferring the fuel oil from the fuel oil storage tank barrel of the transfer origin to the fuel oil storage tank barrel of the transfer destination includes: the fuel A transfer pipe communicating with the oil storage tank and the fuel oil separation tank, and a transfer pump provided in the transfer pipe to suck the fuel oil in the fuel oil storage tank toward the fuel oil separation tank, and the transfer pump A suction pipe that discharges the heated fuel oil toward the fuel oil storage tank, a down-flow pump provided at the suction pipe that can discharge the heated fuel oil little by little, and a separate installation on the transfer pipe and suction The on-off valve used to set the fuel oil transfer direction is controlled by a control section of the transfer pump, the down pump, and each of the on-off valves. The control section is configured to store the fuel oil in the barrel of the fuel oil storage tank. A residual amount sensor for detecting the residual amount of fuel, a temperature sensor for detecting the temperature of the fuel oil moving in the transfer pipe, And a pressure sensor that detects the pressure of the fuel oil flowing into the transfer pump, a timer that measures the operating time of the transfer pump, and a liquid that detects the amount of fuel oil in the fuel oil separation tank. The position sensor is connected to the input side, and the drive part of the transfer pump and the down pump is connected to the output side. Based on the result of comparing the data from each sensor and the timer with the specified conditions, it is judged as a When the viscosity of the fuel oil sucked by the transfer pump is high, in order to forcibly stop the transfer pump from dissolving the viscosity of the fuel oil flowing through the transfer pump, you can choose to use the down-flow pump to heat the heated fuel oil. A process in which fuel oil is mixed with fuel oil intercepted on a fuel oil suction side of the transfer pump to flow out toward the fuel oil storage tank, and a process in which the down pump is operated simultaneously with the operation of the transfer pump. For example, the fuel oil transfer system of the scope of application for the patent item 1 or 2, in which 的 and the operation of the transfer pump are operated at the same time as the transfer pump is operated, the fuel oil transferred to the transfer pump by the transfer pump is set to: The amount is smaller than the amount of fuel oil transferred to the fuel oil separation tank by the transfer pump. For example, the fuel oil transfer system according to item 1 or 2 of the scope of patent application, wherein the process of operating the down pump at the same time as the operation of the transfer pump is the storage of the fuel oil at the transfer destination where the fuel oil is returned by the down pump. Different from the tank, it can also be performed when the fuel oil storage tank from which the heated fuel oil is transferred is originated, and the fuel oil is pumped toward the fuel oil separation tank to replenish the fuel oil.