Fuel oil mixing system and fuel oil mixing method

Abstract

A fuel oil mixing system (1) is a system for generating a clean fuel oil (CO) obtained by cleaning a mixed fuel oil (MO) obtained by mixing a biodiesel fuel oil (BO) with a mineral fuel oil (FO). A fuel oil mixing system (1) is provided with: a fuel oil cleaning machine (21) disposed in a ship; a storage tank (71) for storing the mineral fuel oil (FO); and a biodiesel tank (41) for storing biodiesel fuel oil (BO). A fuel oil mixing system (1) supplies a mixed fuel oil (MO) generated by mixing a mineral fuel oil (FO) in a storage tank (71) and a biodiesel fuel oil (BO) in a biodiesel tank (41) to a fuel oil cleaning machine (21).

Description

Technical Field

[0001] The present invention relates to a fuel oil mixing system and a fuel oil mixing method for mixing mineral fuel oil (petroleum fuel oil) and biodiesel fuel oil to generate mixed fuel oil. Background Art

[0002] In recent years, as a countermeasure to global warming, the reduction of greenhouse gas emissions has attracted attention. Therefore, in internal combustion engines, combustion devices, etc., the use of mixed fuel oils, which are obtained by mixing other fuels with mineral fuel oils (e.g., petroleum fuels such as gasoline and heavy oil), is being promoted to reduce the consumption of mineral fuel oils and reduce the environmental load (e.g., see Patent Document 1).

[0003] As an alternative fuel for reducing greenhouse gas emissions in international shipping, there is biodiesel fuel oil, which is considered a carbon-neutral fuel.

[0004] Among alternative fuels, biodiesel fuel oil has the advantage that it can be used relatively easily in existing diesel engines. Generally, biodiesel fuel oil is mixed with existing mineral fuel oil and then used as fuel for propulsion engines, generator engines, boilers, etc.

[0005] Methods for mixing petroleum-based fuel oil and biodiesel fuel oil include a method of loading the mixed fuel oil mixed in land facilities on a ship for use and a method of loading the petroleum-based fuel oil and biodiesel fuel oil on separate ships and mixing them to produce a mixed fuel oil.

[0006] Among the methods for mixing mineral fuel oil and biodiesel fuel oil in a ship, there is a method in which the mineral fuel oil and the biodiesel fuel oil are temporarily stored in different storage tanks, and each fuel is transferred to a tank storing the mixed fuel oil and combined in the tank. As another mixing method, there is a method in which each fuel is combined in the middle of the piping transferred to the tank storing the mixed fuel oil.

[0007] Prior art literature

[0008] Patent Literature

[0009] Patent Document 1: Japanese Patent Application No. 4733711 Summary of the invention

[0010] Problems to be solved by the invention

[0011] Mineral fuel oil and biodiesel fuel oil have various properties, and sometimes the viscosity or specific gravity of the two are different. In this case, the method of combining the mineral fuel oil and the biodiesel fuel oil in a storage tank or in the middle of a transfer pipe may cause insufficient stirring.

[0012] Mineral fuel oil and biodiesel fuel oil have different calorific values. Therefore, if the stirring state is insufficient, there is a problem that the output of the engine and the output of the boiler fluctuate.

[0013] The method of fully stirring and mixing the fuel oil can be achieved by existing technology, but there are problems such as the cost of additional equipment and the cost of modification.

[0014] An object of the present invention is to provide a fuel oil mixing system and a fuel oil mixing method which can solve the above-mentioned problems, efficiently mix mineral fuel oil and biodiesel fuel oil, and remove sludge generated by the mixing.

[0015] Solutions for solving problems

[0016] In order to solve the above-mentioned problems, the present invention is a fuel oil mixing system, which is used to generate clean fuel oil by purifying a mixed fuel oil formed by mixing biodiesel fuel oil with mineral fuel oil, wherein the fuel oil mixing system comprises: a fuel oil cleaner, which is arranged in a ship; a first tank, which stores the mineral fuel oil; and a second tank, which stores the biodiesel fuel oil, and the fuel oil mixing system supplies the mixed fuel oil generated by mixing the mineral fuel oil in the first tank and the biodiesel fuel oil in the second tank to the fuel oil cleaner.

[0017] In addition, the present invention is a fuel oil mixing system, which is used to generate clean fuel oil by cleaning a mixed fuel oil formed by mixing biodiesel fuel oil with mineral fuel oil, wherein the fuel oil mixing system comprises: a fuel oil cleaner, arranged in a ship; a first tank, storing the mineral fuel oil; a second tank, storing the biodiesel fuel oil; a cleaner inlet pipeline, used to supply the mineral fuel oil in the first tank to the fuel oil cleaner; and a biofuel supply pipeline, used to supply the biodiesel fuel oil in the second tank to the cleaner inlet pipeline.

[0018] Furthermore, the present invention is a fuel oil mixing method, which generates a mixed fuel oil by mixing biodiesel fuel oil with mineral fuel oil on board a ship, and generates clean fuel oil by purifying the mixed fuel oil, wherein the biodiesel fuel oil and the mineral fuel oil are combined on the upstream side of a fuel oil cleaner to generate the mixed fuel oil, and the mixed fuel oil is supplied to the fuel oil cleaner to generate clean fuel oil.

[0019] Effects of the Invention

[0020] The fuel oil mixing system and the fuel oil mixing method of the present invention can efficiently mix mineral fuel oil and biodiesel fuel oil automatically or manually, and can remove sludge generated by the mixing. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic configuration diagram showing a fuel oil mixing system and a fuel oil mixing method according to a first embodiment of the present invention.

[0022] Figure 2 It is a schematic configuration diagram showing a fuel oil mixing system and a fuel oil mixing method according to a second embodiment of the present invention.

[0023] Figure 3 It is a schematic configuration diagram showing a fuel oil mixing system and a fuel oil mixing method according to a third embodiment of the present invention.

[0024] Figure 4 It is a schematic configuration diagram showing a first modified example of the fuel-oil mixing system and the fuel-oil mixing method according to the present invention.

[0025] Figure 5 It is a schematic configuration diagram showing a second modified example of the fuel-oil mixing system and the fuel-oil mixing method according to the present invention.

[0026] Figure 6 It is a schematic configuration diagram showing a third modified example of the fuel-oil mixing system and the fuel-oil mixing method according to the present invention.

[0027] Figure 7 It is a schematic configuration diagram showing a fourth modified example of the fuel-oil mixing system and the fuel-oil mixing method according to the present invention.

[0028] Figure 8 It is a schematic configuration diagram showing a fifth modified example of the fuel-oil mixing system and the fuel-oil mixing method according to the present invention.

[0029] Fig. 9 It is a schematic configuration diagram showing the main parts of a sixth modified example of the fuel-oil mixing system and the fuel-oil mixing method according to the present invention.

[0030] Fig.10 It is a schematic diagram showing the structure of a seventh modified example of the fuel-oil mixing system and the fuel-oil mixing method according to the present invention.

[0031] Fig.11 It is a schematic configuration diagram showing an eighth modified example of the fuel-oil mixing system and the fuel-oil mixing method according to the present invention.

[0032] Fig.12 It is a schematic configuration diagram showing the main parts of a ninth modified example of the fuel-oil mixing system and the fuel-oil mixing method according to the present invention.

[0033] Fig.13 It is a schematic configuration diagram showing a fuel-oil mixing system and a fuel-oil mixing method according to a fourth embodiment of the present invention.

[0034] Fig.14 It is a schematic structural diagram showing a tenth modified example of the fuel-oil mixing system and the fuel-oil mixing method according to the present invention.

[0035] Fig.15 It is a schematic diagram showing the structure of an eleventh modified example of the fuel-oil mixing system and the fuel-oil mixing method according to the present invention.

[0036] Fig.16 It is a schematic configuration diagram showing a twelfth modified example of the fuel-oil mixing system and the fuel-oil mixing method of the present invention.

[0037] Fig.17 It is a schematic structural diagram showing a thirteenth modified example of the fuel-oil mixing system and the fuel-oil mixing method of the present invention.

[0038] Fig.18 It is a schematic diagram showing the structure of a fourteenth modified example of the fuel-oil mixing system and the fuel-oil mixing method according to the present invention.

[0039] Fig.19 It is a schematic structural diagram showing a fifteenth modified example of the fuel-oil mixing system and the fuel-oil mixing method of the present invention.

[0040] Fig. 20 It is a schematic structural diagram showing a sixteenth modified example of the fuel-oil mixing system and the fuel-oil mixing method of the present invention.

[0041] Fig.21 It is a schematic diagram showing the structure of a seventeenth modified example of the fuel-oil mixing system and the fuel-oil mixing method of the present invention.

[0042] Fig. 22 It is a schematic structural diagram showing an eighteenth modified example of the fuel-oil mixing system and the fuel-oil mixing method of the present invention. DETAILED DESCRIPTION

[0043] [First embodiment]

[0044] Reference Figure 1 A fuel oil mixing system 1 and a fuel oil mixing method according to a first embodiment of the present invention will be described in detail. Figure 1 Here, the vertical direction is described as being perpendicular to the liquid surface of the fuel stored in the first tank 11 , the service tank 31 , and the second tank 41 .

[0045] <Fuel oil mixing system>

[0046] Figure 1 The fuel oil mixing system 1 shown is a device that generates mixed fuel oil MO (Mixed Fuel Oil (hereinafter, marked as "MO") by mixing mineral fuel oil FO (Fuel Oil (hereinafter, marked as "FO") and biodiesel fuel oil BO (Biodiesel Fuel Oil (hereinafter, marked as "BO"), and generates clean fuel oil CO (Clean Fuel Oil (hereinafter, marked as "CO") by cleaning the mixed fuel oil MO. The clean fuel oil CO is used for engines, auxiliary machines, etc. of ships. The fuel oil mixing system 1 mainly includes: a first tank 11, a second tank 41, a fuel oil cleaner 21, a cleaner inlet pipeline 12, a biofuel supply pipeline 42, and a service tank 31. The fuel oil mixing system 1 is arranged inside the ship.

[0047] <Mineral fuel oil>

[0048] Mineral fuel oil FO (also referred to as fuel oil) is a petroleum-based fuel oil that has been used in ships and the like. Fuel oils include C heavy oil, A heavy oil, SO X The mineral fuel oil FO is stored in a fuel oil storage tank (not shown) arranged in the ship. When the mixed fuel oil MO is produced, the mineral fuel oil FO is transferred to the first tank 11 and stored.

[0049] <Biodiesel fuel oil>

[0050] Biodiesel fuel oil BO is a fuel that has the function of being a carbon-neutral fuel that balances the emission and absorption of greenhouse gases. Biodiesel fuel oil BO is an environmentally friendly fuel for diesel engines that is made of vegetable oils such as rapeseed oil, palm oil, olive oil, sunflower oil, soybean oil, and waste cooking oils such as tempura oil. The main component of biodiesel fuel oil BO is fatty acid methyl ester. The fuel consumption and driving performance of biodiesel fuel oil BO are roughly equivalent to those of light oil.

[0051] <Mixed fuel oil>

[0052] The mixed fuel oil MO is a fuel produced by mixing mineral fuel oil FO and biodiesel fuel oil BO. The mixed fuel oil MO is produced by combining biodiesel fuel oil BO and mineral fuel oil FO on the upstream side of the fuel oil cleaning machine 21. In the process from the confluence point a to the fuel oil cleaning machine 21, the mixing of the mineral fuel oil FO and the biodiesel fuel oil BO also develops. The degree of mixing of the mixed fuel oil MO varies before and after the fuel oil cleaning machine 21, so in the following description, the mixed fuel oil MO that has passed through the fuel oil cleaning machine 21 is referred to as "clean fuel oil CO".

[0053] <Clean fuel oil>

[0054] Clean fuel oil CO is fuel oil obtained by cleaning mixed fuel oil MO by fuel oil cleaning machine 21. Clean fuel oil CO is temporarily stored in service tank 31 from fuel oil cleaning machine 21 through fuel cleaning oil line 22 and then supplied to the engine or auxiliary machinery (e.g., generator, boiler, etc.) of the ship.

[0055] <First Can>

[0056] The first tank 11 is a fuel oil storage tank (settling tank) for temporarily storing the mineral fuel oil FO delivered from the fuel oil storage tank (not shown) by a transfer pump. A fuel oil discharge port 11a for delivering the fuel oil to the cleaning machine inlet pipeline 12 is formed at the lower part of the first tank 11. It should be noted that the fuel oil storage tank is a bottom tank having a capacity capable of storing the mineral fuel oil FO required during navigation, and is often formed on the bottom of the ship.

[0057] It should be noted that since the mineral fuel oil FO is not directly fed from the fuel oil storage tank (not shown) to the fuel oil cleaning machine 21 , the first tank 11 (sedimentation tank) is required.

[0058] The first tank 11 is formed to have a size capable of storing approximately several tenths of the capacity of a fuel oil storage tank (not shown).

[0059] The pump capacity of the fuel transfer pump (not shown) is about 10 times greater than that of the clean machine fuel supply pump 13 so that the mineral fuel oil FO can be transferred from the fuel oil storage tank (not shown) to the first tank 11 in a short time.

[0060] The timing for transferring the mineral fuel oil FO from the fuel oil storage tank to the first tank 11 is when the liquid level of the mineral fuel oil FO in the first tank 11 becomes below a predetermined liquid level. Therefore, the operation time of the fuel transfer pump (not shown) is shorter than that of the clean machine fuel supply pump 13.

[0061] Furthermore, a pipe having a larger diameter than that of the pipe arranged around the cleaning machine fuel supply pump 13 is also used for the transfer pipe from the fuel oil storage tank to the first tank 11 .

[0062] <Cleaning machine inlet pipeline>

[0063] The cleaning machine inlet line 12 is a fuel oil supply flow path for supplying the mineral fuel oil FO in the first tank 11 to the fuel oil cleaning machine 21. The cleaning machine inlet line 12 is composed of a piping path from the fuel oil discharge port 11a of the first tank 11 to the inlet 21a of the fuel oil cleaning machine 21 via the junction a with the biofuel supply line 42. The cleaning machine inlet line 12 is composed of an upstream cleaning machine inlet line 12a from the fuel oil discharge port 11a to the junction a and a downstream cleaning machine inlet line 12b from the junction a to the inlet 21a of the fuel oil cleaning machine 21.

[0064] The upstream cleaning machine inlet line 12a is a flow path for conveying the mineral fuel oil FO in the first tank 11 to the confluence point a. In the upstream cleaning machine inlet line 12a, a cleaning machine fuel supply pump 13, a cleaning machine fuel flow meter 14, and the confluence point a are provided in order from the first tank 11 side at appropriate intervals.

[0065] It should be noted that, when the biodiesel fuel oil BO and the mineral fuel oil FO of the biofuel supply line 42 are mixed in the middle of the upstream cleaning machine inlet line 12a, a flow adjustment mechanism for adjusting the mixing ratio can be added to the upstream cleaning machine inlet line 12a. The flow adjustment mechanism is preferably of a size that is compatible with the size of the piping of the upstream cleaning machine inlet line 12a.

[0066] As the flow rate adjustment mechanism, it is preferable to add a second cleaning machine return line 17B (see Figure 3 ), nozzles, regulating valves, or running the transfer pump.

[0067] The downstream cleaning machine inlet line 12b is a flow path that conveys the mineral fuel oil FO in the first tank 11 and the biodiesel fuel oil BO (mixed fuel oil MO before cleaning) in the second tank 41 that merge at the merging point a to the inlet 21a.

[0068] exist Figure 1 In the method, for example, when the mixing ratio of biodiesel fuel oil BO to mineral fuel oil FO is 30%, the flow rate of the downstream cleaning machine inlet pipeline 12b is increased by about 30% as compared with the flow rate of the upstream cleaning machine inlet pipeline 12a. Therefore, it is preferable to set the piping size of the downstream cleaning machine inlet pipeline 12b in consideration of this point.

[0069] <Cleaning machine fuel supply pump>

[0070] The clean machine fuel supply pump 13 is a pump for delivering the mineral fuel oil FO in the upstream clean machine inlet line 12a to the junction a. The clean machine fuel supply pump 13 is provided between the fuel oil discharge port 11a and a clean machine fuel flow meter 14 provided in the upstream clean machine inlet line 12a.

[0071] <Fuel flow meter for clean machine>

[0072] The clean machine fuel flow meter 14 is a flow meter for measuring the flow rate of the mineral fuel oil FO delivered from the first tank 11 to the confluence point a side when the mineral fuel oil FO and the biodiesel fuel oil BO are merged at the confluence point a. The clean machine fuel flow meter 14 is provided between the clean machine fuel supply pump 13 of the upstream side clean machine inlet pipeline 12a and the confluence point a.

[0073] It should be noted that the cleaning machine fuel flow meter 14 may also be provided between the fuel oil discharge port 11a and the cleaning machine fuel supply pump 13 of the upstream cleaning machine inlet line 12a. Figure 1 Locations other than those shown.

[0074] <Meeting point>

[0075] The junction a is a connection point between the upstream cleaning machine inlet line 12a and the biofuel supply line 42. Therefore, at the junction a, the mineral fuel oil FO in the upstream cleaning machine inlet line 12a and the biodiesel fuel oil BO in the biofuel supply line 42 are joined and mixed.

[0076] <Mixer>

[0077] A mixer (not shown) may also be provided downstream of the confluence point a (on the pipeline connecting the confluence point a to the inlet 21a). As an example of a mixer, a static mixer, an in-tube mixer such as a venturi tube, etc. may be cited, but the mixer is not limited to these, and any unit may be used as long as it can stir two types of fuel oil.

[0078] <Second Can>

[0079] The second tank 41 is a biodiesel fuel oil tank for temporarily storing the biodiesel fuel oil BO. A biodiesel fuel oil discharge port 41 a for delivering the biodiesel fuel oil BO to the biofuel supply line 42 is formed at the lower portion of the second tank 41 .

[0080] <Biofuel supply pipeline>

[0081] The biofuel supply line 42 is composed of a pipeline for conveying the biodiesel fuel oil BO in the second tank 41 to the cleaning machine inlet line 12. On the biofuel supply line 42, a biofuel supply pump 43, a biofuel supply flow meter 44, and a shutoff valve 45 are sequentially provided at appropriate intervals from the second tank 41 side.

[0082] It should be noted that it is preferable to use stainless steel pipes as the pipes of the biofuel supply line 42 for conveying the biodiesel fuel oil BO.

[0083] <Biofuel supply pump>

[0084] The biofuel supply pump 43 is a pump for delivering the biodiesel fuel oil BO in the biofuel supply line 42 to the junction a via the biofuel supply flowmeter 44 and the shutoff valve 45. The biofuel supply pump 43 is provided between the biodiesel fuel oil discharge port 41a and the biofuel supply flowmeter 44 of the biofuel supply line 42.

[0085] <Biofuel supply flow meter>

[0086] The biofuel supply flowmeter 44 is a flowmeter for measuring the flow rate of the biodiesel fuel oil BO delivered to the confluence point a. The biofuel supply flowmeter 44 is provided between the biofuel supply pump 43 and the shutoff valve 45 of the biofuel supply pipeline 42. It should be noted that the biofuel supply flowmeter 44 may also be provided on the tail stream side of the shutoff valve 45.

[0087] The cleaning machine fuel flowmeter 14 and the biofuel supply flowmeter 44 are provided to adjust the mixing ratio of the mineral fuel oil FO and the biodiesel fuel oil BO. As an example of the mixing ratio, the flow rate of the mineral fuel oil FO flowing from the first tank 11 to the upstream cleaning machine inlet pipeline 12a is 70%, and the flow rate of the biodiesel fuel oil BO flowing from the second tank 41 to the biofuel supply pipeline 42 is 30%. It should be noted that this mixing ratio is an example and is not limited to this ratio.

[0088] <Shutoff valve>

[0089] The shutoff valve 45 is a valve for directing or shutting off the biodiesel fuel oil BO in the biofuel supply line 42 to flow toward the junction a. The shutoff valve 45 is provided between the biofuel supply flow meter 44 and the junction a of the biofuel supply line 42. The shutoff valve 45 is electrically connected to a control device (not shown).

[0090] <Fuel oil cleaning machine>

[0091] The fuel oil cleaning machine 21 is a cleaning machine for cleaning the mixed fuel oil MO. In the following first embodiment, the case where the water and solid components contained in the oil are separated and cleaned by centrifugal separation is described, but as a cleaning unit, a filter can be used instead of a centrifugal separator. As a filtering method, any method such as pressure filtration, vacuum filtration, reduced pressure filtration, gravity filtration, centrifugal filtration, etc. can be used. In the following first embodiment, although the fuel oil cleaning machine 21 can also be a filter, the case where the fuel oil cleaning machine 21 is a centrifugal separator is used as an example for description.

[0092] The fuel oil cleaning machine 21 of the first embodiment is composed of a well-known centrifugal separator that performs solid-liquid separation or liquid-liquid separation on the mixed fuel oil MO by the high centrifugal force of the high-speed rotating rotating body. The fuel oil cleaning machine 21 is, for example, a separation plate type centrifugal separator in which a separation plate group composed of stacked separation plates is attached to the rotating body. The separation plate type centrifugal separator can efficiently remove solid components and water contained in the mixed fuel oil MO. The fuel oil cleaning machine 21 is installed in the ship between the confluence point a of the cleaning machine inlet pipeline 12 and the fuel cleaning oil pipeline 22.

[0093] It should be noted that in Figure 1 In the figure, only one fuel oil cleaning machine 21 is shown, but a plurality of fuel oil cleaning machines 21 may be arranged in parallel. In the following, in order to facilitate understanding of the fuel cleaning system, the fuel oil mixing system 1 is described by taking a case where one fuel oil cleaning machine 21 is provided as an example.

[0094] <Fuel Clean Oil Pipeline>

[0095] The clean fuel oil line 22 is a flow path for delivering clean fuel oil CO after the mixed fuel oil MO is cleaned by the fuel oil cleaning machine 21 to the service tank 31. The clean fuel oil line 22 is composed of a pipeline from the discharge port 21b of the fuel oil cleaning machine 21 to the clean fuel oil supply port 31a of the service tank 31.

[0096] <Serving tank>

[0097] The service tank 31 is a tank for storing clean fuel oil CO. The clean fuel oil CO in the service tank 31 is supplied to the engine or auxiliary machinery (e.g., generator, boiler, etc.) of the ship. The service tank 31 is provided with a clean fuel oil supply port 31a and an overflow pipe 32. The service tank 31 is provided at the most downstream portion of the clean fuel oil pipeline 22.

[0098] The clean fuel oil supply port 31 a is an outlet of the fuel clean oil pipeline 22. The clean fuel oil supply port 31 a is provided at an upper portion of the service tank 31.

[0099] Overflow pipe

[0100] The overflow pipe 32 is used to keep the liquid level of the clean fuel oil CO in the service tank 31 constant. The overflow pipe 32 is provided between the service tank 31 and the first tank 11 .

[0101] "effect"

[0102] Next, refer to Figure 1 The operation of the fuel-oil mixing system 1 and the fuel-oil mixing method according to the first embodiment of the present invention will be described.

[0103] First, the mineral fuel oil FO located outside the ship is transferred and stored in a fuel oil storage tank (not shown) inside the ship. Also, the biodiesel fuel oil BO located outside the ship is transferred and stored in a second tank 41 inside the ship.

[0104] Next, the mineral fuel oil FO stored in the fuel oil storage tank (not shown) is transferred to the first tank 11 by a transfer pump (not shown). When the liquid level of the mineral fuel oil FO in the first tank 11 drops to a predetermined low liquid level, the mineral fuel oil FO in the fuel oil storage tank (not shown) is automatically transferred to the first tank 11 by the fuel transfer pump. And, when the liquid level of the mineral fuel oil FO in the first tank 11 reaches a predetermined high liquid level, the transfer of the mineral fuel oil FO to the first tank 11 is stopped.

[0105] When the mineral fuel oil FO in the first tank 11 is supplied to the fuel oil cleaning machine 21, the cleaning machine fuel supply pump 13 is driven. When the cleaning machine fuel supply pump 13 is driven, the mineral fuel oil FO is sucked out from the fuel oil discharge port 11a and sent to the confluence point a side through the cleaning machine fuel flowmeter 14.

[0106] When the biodiesel fuel oil BO in the second tank 41 is supplied to the fuel oil cleaning machine 21, the shutoff valve 45 is opened and the biofuel supply pump 43 is driven. Then, the biodiesel fuel oil BO is sucked out from the biodiesel fuel oil discharge port 41a to the biofuel supply pipeline 42 by the biofuel supply pump 43, and is delivered to the side of the confluence point a via the biofuel supply pump 43, the biofuel supply flowmeter 44, and the shutoff valve 45.

[0107] At the confluence point a on the upstream side of the fuel oil cleaning machine 21, the mineral fuel oil FO of the upstream cleaning machine inlet line 12a and the biodiesel fuel oil BO of the biofuel supply line 42 are merged to generate mixed fuel oil MO. The mixed fuel oil MO is sent from the inlet 21a to the fuel oil cleaning machine 21 through the downstream cleaning machine inlet line 12b. The mixed fuel oil MO is subjected to centrifugal force in the fuel oil cleaning machine 21 to remove impurities such as solid components and moisture, and further stirring and mixing of the mineral fuel oil FO and the biodiesel fuel oil BO progresses.

[0108] The clean fuel oil CO after the mixed fuel oil MO is cleaned by the fuel oil cleaning machine 21 is transported from the fuel oil cleaning machine 21 to the service tank 31 through the fuel clean oil pipeline 22 and temporarily stored in the service tank 31. The clean fuel oil CO in the service tank 31 is supplied to the engine or auxiliary engine of the ship for use as needed.

[0109] So, like Figure 1 As shown, a first embodiment of the present invention is a fuel oil mixing system 1, which is used to generate clean fuel oil CO by cleaning mixed fuel oil MO obtained by mixing biodiesel fuel oil BO with mineral fuel oil FO. The fuel oil mixing system 1 includes: a fuel oil cleaner 21, which is arranged in a ship; a first tank 11, which stores mineral fuel oil FO; a second tank 41, which stores biodiesel fuel oil BO; a cleaner inlet pipeline 12, which is used to supply the mineral fuel oil FO in the first tank 11 to the fuel oil cleaner 21; and a biofuel supply pipeline 42, which is used to supply the biodiesel fuel oil BO in the second tank 41 to the cleaner inlet pipeline 12.

[0110] The fuel oil mixing system 1 of the present invention has a junction a in the ship where the downstream of the biofuel supply line 42 merges with the cleaning machine inlet line 12. Therefore, the fuel oil mixing system 1 can efficiently mix the mineral fuel oil FO and the biodiesel fuel oil BO in the ship, and thus can supply the mixed fuel oil MO to the engine or auxiliary engine of the ship for use.

[0111] In addition, the fuel oil mixing system 1 further includes a fuel oil cleaning machine 21 for cleaning the mixed fuel oil MO to generate clean fuel oil CO. The fuel oil cleaning machine 21 not only cleans the mixed fuel oil MO, but also plays a role in stirring the mineral fuel oil FO and the biodiesel fuel oil BO, thereby being able to remove sludge generated by mixing. Therefore, the present invention can generate clean fuel oil CO with less impurities and biodiesel fuel oil BO uniformly dispersed in the mineral fuel oil FO, and supply the clean fuel oil CO to the engine or auxiliary engine of the ship for use.

[0112] The first tank 11 is a sedimentation tank (clarification tank) provided separately from the fuel oil storage tank (not shown).

[0113] According to this configuration, the mineral fuel oil FO for producing the mixed fuel oil MO can be stored in advance, so that by heating the mineral fuel oil FO from the fuel oil storage tank to a certain temperature and leaving it to stand, the solid matter and water can be precipitated and separated to the tank bottom. In addition, by returning the remaining part of the clean fuel oil CO sent to the service tank 31 to the first tank 11 through the overflow pipe 32, the liquid level of the service tank 31 can be always maintained in a full liquid state.

[0114] In addition, if Figure 1 As shown, the fuel oil mixing system 1 includes a service tank 31 for storing the mixed fuel oil MO (cleaned fuel oil CO) cleaned by the fuel oil cleaning machine 21 .

[0115] According to this configuration, the mixed fuel oil MO (clean fuel oil CO) cleaned by the fuel oil cleaning machine 21 can be stored in the service tank 31, so the clean fuel oil CO can be supplied to the engine or auxiliary machine of the ship for use as needed.

[0116] In addition, if Figure 1 As shown, the first embodiment is a fuel oil mixing method, which generates mixed fuel oil MO by mixing biodiesel fuel oil BO with mineral fuel oil FO in a ship, and generates clean fuel oil CO after cleaning the mixed fuel oil MO, wherein the biodiesel fuel oil BO and the mineral fuel oil FO are merged on the upstream side of the fuel oil cleaning machine 21 to generate the mixed fuel oil MO, and the mixed fuel oil MO is supplied to the fuel oil cleaning machine 21, thereby generating the clean fuel oil CO.

[0117] It is considered that if the mineral fuel oil FO and the biodiesel fuel oil BO are simply mixed in the piping line, the mixed state may be insufficient. If the mineral fuel oil FO and the biodiesel fuel oil BO are stored or left to stand in a tank or the like in this state, the insufficiently mixed mineral fuel oil FO and the biodiesel fuel oil BO may separate.

[0118] According to the first embodiment, the mineral fuel oil FO and the biodiesel fuel oil BO are mixed in the piping line, but after the mixing, before being left to stand in the service tank 31, etc., the fuel oil MO can be stirred and mixed uniformly by the stirring / mixing action in the rotating body of the fuel oil cleaning machine 21, even if a mixer is not separately provided in the middle of the piping. In addition, the sludge generated by the mixing can be removed by the fuel oil cleaning machine 21 before being stored in the service tank 31, and the clean fuel oil CO after the cleaning can be delivered to the service tank 31.

[0119] [Second Embodiment]

[0120] Next, refer to Figure 2 The fuel oil mixing system 1A and the fuel oil mixing method according to the second embodiment of the present invention are described with the difference from the fuel oil mixing system 1 and the fuel oil mixing method according to the first embodiment as the center. It should be noted that the same reference numerals are given to the components that have been described and their description is omitted. Figure 2 It is a schematic configuration diagram showing a fuel-oil mixing system 1A and a fuel-oil mixing method according to a second embodiment of the present invention.

[0121] like Figure 2 As shown, the fuel oil mixing system 1A of the second embodiment of the present invention is different from that of the first embodiment in that: it is provided with a first cleaning machine return pipeline 17A (cleaning machine return pipeline) from the cleaning machine inlet pipeline 12 to the first tank 11; and a fuel oil switching unit 16 is provided on the downstream side of the confluence point a of the cleaning machine inlet pipeline 12 and the biofuel supply pipeline 42 for switching the mixed fuel oil MO in the cleaning machine inlet pipeline 12 to flow through the first cleaning machine return pipeline 17A (cleaning machine return pipeline).

[0122] The first cleaning machine return line 17A is composed of a piping for returning the mineral fuel oil FO from the cleaning machine inlet line 12 on the downstream side of the junction a to the first tank 11. A fuel oil switching unit 16 is provided at the branching portion between the cleaning machine inlet line 12 and the first cleaning machine return line 17A. The fuel oil switching unit 16 switches between the mineral fuel oil FO in the cleaning machine inlet line 12 (downstream cleaning machine inlet line 12b) flowing to the first cleaning machine return line 17A side and the mixed fuel oil MO flowing to the fuel oil cleaning machine 21 side. The fuel oil switching unit 16 is composed of, for example, a three-way valve (switching valve). The fuel oil switching unit 16 is electrically connected to a control device (not shown) and is controlled by the control device (not shown).

[0123] The upstream side of the first cleaning machine return line 17A is connected to the fuel oil switching unit 16 , and the downstream side is connected to the mixed fuel oil inlet 11 b of the first tank 11 .

[0124] In this case, when the fuel oil cleaning machine 21 is stopped and no liquid is passed to the fuel oil cleaning machine 21, the fuel oil switching unit 16 flows to the first cleaning machine return pipeline 17A side. The operation of the fuel oil cleaning machine 21 first starts the cleaning machine fuel supply pump 13 to make the mineral fuel oil FO flow to the cleaning machine inlet pipeline 12. At the same time, the fuel oil cleaning machine 21 is started and its rotation speed is increased. Since (through the first oil heater H1 (refer to Figure 4)) The fuel oil switching unit 16 switches to the first cleaning machine return line 17A, so that the mineral fuel oil FO discharged from the cleaning machine fuel supply pump 13 is returned to the first tank 11 in its entirety. During this period, the first oil heater H1 (see Figure 4 ) is turned on. It takes several minutes for the fuel oil cleaning machine 21 to reach the rated speed. When the fuel oil cleaning machine 21 reaches the rated speed, the first oil heater H1 (refer to Figure 4 ) After the outlet temperature of the fuel oil cleaning machine 21 is stabilized, the fuel oil cleaning machine 21 starts to operate automatically. (It should be noted that the fuel oil cleaning machine 21 can also be operated manually.)

[0125] When the rotating body of the fuel oil cleaning machine 21 becomes a state in which liquid can flow, the fuel oil switching unit 16 is switched to the fuel oil cleaning machine 21 side, and the mineral fuel oil FO is passed to the fuel oil cleaning machine 21 to start the cleaning process. When the biodiesel fuel oil BO is mixed with the mineral fuel oil FO, the biodiesel fuel oil switching unit 45A opens the valve at this time, and the biodiesel fuel oil BO is supplied to the cleaning machine inlet pipeline 12 and the confluence point a.

[0126] Since the cleaning machine fuel supply pump 13 is a volumetric constant-flow pump, in order to adjust the amount of liquid flowing to the fuel oil cleaning machine 21, the valve of the mineral fuel oil flow adjustment unit 19 of the cleaning machine bypass pipeline 18 is adjusted, and the excess flow portion is returned to the first tank 11 via the first cleaning machine return pipeline 17A.

[0127] In order to minimize the mixing of biodiesel fuel oil BO into the first tank 11, only when the fuel oil switching unit 16 is switched to the fuel oil cleaner 21 side, the biodiesel fuel oil switching unit 45A is opened and operated to mix the biodiesel fuel oil BO.

[0128] According to the fuel oil mixing system 1A of the second embodiment, the fuel oil switching unit 16 is switched to the fuel oil cleaning machine 21 side only when the fuel oil cleaning machine 21 is passed through the fuel oil cleaning machine 21. Therefore, when the fuel oil cleaning machine 21 performs a sludge discharge process, etc., it can be easily switched to the first cleaning machine return pipeline 17A (cleaning machine return pipeline).

[0129] In addition, the fuel oil mixing system 1A is different from the first embodiment in that: a cleaning machine bypass pipeline 18 is provided to allow the mineral fuel oil FO in the upstream cleaning machine inlet pipeline 12a to flow to the first cleaning machine return pipeline 17A; and a mineral fuel oil flow adjustment unit 19 is provided to switch the mineral fuel oil FO in the cleaning machine inlet pipeline 12 to flow through the first cleaning machine return pipeline 17A side.

[0130] The cleaning machine bypass line 18 is composed of a pipe line from the discharge side of the cleaning machine fuel supply pump 13 provided in the upstream cleaning machine inlet line 12a to the first cleaning machine return line 17A. The cleaning machine bypass line branch point b, which is the branch point between the upstream cleaning machine inlet line 12a and the cleaning machine bypass line 18, is arranged between the cleaning machine fuel supply pump 13 provided in the cleaning machine inlet line 12 (upstream cleaning machine inlet line 12a) and the cleaning machine fuel flow meter 14. A mineral fuel oil flow rate adjustment unit 19 is provided in the cleaning machine bypass line 18 on the upstream side of the junction point a of the cleaning machine inlet line 12 and the biofuel supply line 42.

[0131] Furthermore, a mixer (not shown) is provided downstream of the junction a.

[0132] In addition, a mineral fuel oil flow rate adjustment unit 19 is provided on the upstream side of the junction a between the cleaning machine inlet line 12 and the biofuel supply line 42. The mineral fuel oil flow rate adjustment unit 19 allows a part of the mineral fuel oil FO in the cleaning machine inlet line 12 to flow through the cleaning machine return line (first cleaning machine return line 17A) side. The mineral fuel oil flow rate adjustment unit 19 is electrically connected to a control device (not shown) and is controlled by the control device (not shown).

[0133] The downstream side of the cleaning machine bypass line 18 only needs to be connected to an appropriate position of the first cleaning machine return line 17A. Therefore, when the flow path is switched to the first cleaning machine return line 17A side by the fuel oil switching unit 16 during the operation of the cleaning machine fuel supply pump 13, the mineral fuel oil FO flowing out of the first tank 11 can be returned to the first tank 11 via the cleaning machine bypass line 18 and the first cleaning machine return line 17A.

[0134] In the second embodiment, by providing a mixer (not shown) downstream of the junction a, the mineral fuel oil FO in the cleaning machine inlet line 12 and the biodiesel fuel oil BO in the biofuel supply line 42 can be efficiently mixed.

[0135] Preferably, a first oil heater H1 or a second oil heater H2 is provided in the cleaning machine inlet pipeline 12 (see Figure 4 as well as Figure 5 ). When the flow rate changes, the first oil heater H1 or the second oil heater H2 (refer to Figure 4 as well as Figure 5) The temperature of the heated oil may become unstable or damage the equipment, so it is preferred to always flow the oil at a constant flow rate through the mineral fuel oil flow control unit 19. The fuel oil mixing system 1A has a first cleaning machine return line 17A, so when the fuel oil cleaning machine 21 is not in a processable state, if the first cleaning machine return line 17A is switched, the first oil heater H1 (see Figure 4 Therefore, the load fluctuation of the first oil heater H1 can be suppressed to a minimum.

[0136] The fuel oil mixing system 1A is different from the first embodiment in that it includes a biodiesel return line 46 from the biofuel supply line 42 to the second tank 41 and a biodiesel fuel oil switching unit 45A for switching the biodiesel fuel oil BO in the biofuel supply line 42 to flow toward the biodiesel return line 46 side.

[0137] In the fuel oil mixing system 1A, a biodiesel return line 46 is connected to the biofuel supply line 42 between the biofuel supply pump 43 and the biofuel supply flowmeter 44. The downstream side of the biodiesel return line 46 is connected to the biodiesel fuel oil return port 41b provided at the upper part of the second tank 41. Therefore, by driving the biofuel supply pump 43, the biodiesel fuel oil BO can flow from the second tank 41 to the second tank 41 through the biodiesel fuel oil discharge port 41a, the biofuel supply pump 43 of the biofuel supply line 42, the biodiesel return line 46, and the biodiesel fuel oil return port 41b in a manner of circulating to the second tank 41. The biodiesel fuel oil switching unit 45A is electrically connected to a control device (not shown) and is controlled by the control device (not shown).

[0138] It should be noted that, similar to the pipes of the biofuel supply line 42 , it is preferable to use stainless steel pipes for the pipes of the biodiesel return line 46 for conveying the biodiesel fuel oil BO.

[0139] According to this configuration, by closing the valve of the biodiesel fuel oil switching unit 45A, the biodiesel fuel oil BO flowing out from the second tank 41 to the biofuel supply line 42 can be returned to the second tank 41, so it is easy to deal with the stop of the flow of liquid to the fuel oil cleaning machine 21. In addition, by adjusting the degree of opening of the biodiesel fuel oil switching unit 45A, the amount of biodiesel fuel oil BO mixed with the mineral fuel oil FO can be adjusted, and the mixed fuel oil MO with an appropriate mixing ratio can be generated.

[0140] [Third Embodiment]

[0141] Next, refer to Figure 3, a fuel-oil mixing system 1B according to a third embodiment of the present invention will be described, focusing on differences from the fuel-oil mixing system 1 according to the first embodiment. Figure 3 It is a schematic configuration diagram showing a fuel-oil mixing system 1B and a fuel-oil mixing method according to a third embodiment of the present invention.

[0142] like Figure 3 As shown, the fuel oil mixing system 1B of the third embodiment of the present invention is different from the first embodiment in that a second cleaning machine return line 17B and a mineral fuel oil switching unit 16B are provided for supplying the mineral fuel oil FO to the first tank 11.

[0143] The second cleaning machine return line 17B is a piping for returning the mineral fuel oil FO from the cleaning machine inlet line 12 on the upstream side of the junction a to the first tank 11. A mineral fuel oil switching unit 16B is provided at the branching portion of the cleaning machine inlet line 12 and the second cleaning machine return line 17B. The mineral fuel oil switching unit 16B has a function of switching the mineral fuel oil FO of the cleaning machine inlet line 12 (upstream cleaning machine inlet line 12a) to flow to either the second cleaning machine return line 17B side or the fuel oil cleaning machine 21 side. The mineral fuel oil switching unit 16B is composed of, for example, a three-way valve (switching valve). It should be noted that the mineral fuel oil switching unit 16B can also be composed of an on-off valve provided in the cleaning machine inlet line 12 and the second cleaning machine return line 17B.

[0144] According to this configuration, the mineral fuel oil switching unit 16B is switched so that the mineral fuel oil FO does not flow toward the confluence point a, thereby returning the mineral fuel oil FO flowing through the upstream cleaning machine inlet line 12 a to the first tank 11 .

[0145] In addition, the difference between the fuel oil mixing system 1B and the first embodiment is that, like the fuel oil mixing system 1A of the second embodiment, it is equipped with a flow adjustment unit 19 for mineral fuel oil on the discharge side of the cleaning machine fuel supply pump 13 arranged in the cleaning machine inlet pipeline 12 (upstream cleaning machine inlet pipeline 12a).

[0146] According to this configuration, by providing the mineral fuel oil flow rate regulating unit 19 , the flow rate of the mineral fuel oil FO flowing from the upstream cleaning machine inlet line 12 a to the junction a can be adjusted, thereby adjusting the mixing ratio with the biodiesel fuel oil BO in the biofuel supply line 42 .

[0147] The fuel oil mixing system 1B is different from the first embodiment in that, similar to the fuel oil mixing system 1A of the second embodiment, a biodiesel return line 46 and a biodiesel fuel oil switching unit 45A are provided.

[0148] According to this configuration, by having the biodiesel return line 46 and the biodiesel fuel oil switching unit 45A, the flow rate of the biodiesel fuel oil BO flowing from the biofuel supply line 42 to the confluence point a can be adjusted, thereby adjusting the mixing ratio with the mineral fuel oil FO in the upstream cleaning machine inlet line 12a.

[0149] [Fourth Embodiment]

[0150] Next, refer to Fig.13 A fuel-oil mixing system 10A according to a fourth embodiment of the present invention will be described, focusing on differences from the fuel-oil mixing system 1 according to the first embodiment. Fig.13 It is a schematic configuration diagram showing a fuel-oil mixing system and a fuel-oil mixing method according to a fourth embodiment of the present invention.

[0151] like Fig.13 As shown, the fuel oil mixing system 10A is different from the first to third embodiments in that: a storage tank 71 (first tank) for storing mineral fuel oil FO is provided; a fuel oil supply pipeline 72 is provided for supplying the mineral fuel oil FO to a confluence point A with the biofuel supply pipeline 42; the confluence point A for mixing the mineral fuel oil FO with the biodiesel fuel oil BO is arranged on the upstream side of the settling tank 11A; the cleaning machine inlet pipeline 12 is composed of a cleaning machine inlet pipeline 12c on the upstream side of the settling tank and a cleaning machine inlet pipeline 12d on the downstream side of the settling tank; and the settling tank 11A is used as a tank for storing mixed fuel oil MO.

[0152] The storage tank 71 (first tank) is provided at the most upstream portion of the fuel oil supply line 72 .

[0153] The fuel oil supply line 72 is provided with a fuel supply pump 73, a fuel flow meter 74, and a shutoff valve 75. The fuel oil supply line 72 is connected to the junction A from the storage tank 71 via the fuel supply pump 73, the fuel flow meter 74, and the shutoff valve 75.

[0154] The fuel supply pump 73 is a pump for sending the mineral fuel oil FO in the fuel oil supply line 72 to the junction A side.

[0155] The fuel flow meter 74 is a flow meter for measuring the flow rate of the mineral fuel oil FO sent from the storage tank 71 to the confluence point A side.

[0156] The shutoff valve 75 is a valve for allowing the mineral fuel oil FO in the storage tank 71 to flow toward the confluence point A or shutting off the flow.

[0157] The biofuel supply line 42 of the first embodiment (see Figure 2) Similarly, a biofuel supply line 42 is provided with a biodiesel tank 41 (second tank), a biofuel supply pump 43, a biofuel supply flow meter 44, and a shutoff valve 45. The biofuel supply line 42 is connected to the junction A from the biodiesel tank 41 via the biofuel supply pump 43, the biofuel supply flow meter 44, and the shutoff valve 45.

[0158] In the fuel oil mixing system 10A, a mixed fuel oil MO is generated by mixing the mineral fuel oil FO and the biodiesel fuel oil BO at the confluence point A. A cleaning machine inlet line 12 for supplying the mixed fuel oil MO to the fuel oil cleaning machine 21 is provided on the downstream side of the confluence point A. The cleaning machine inlet line 12 is composed of a cleaning machine inlet line 12c on the upstream side of the settling tank 11A from the confluence point A to the settling tank 11A, the settling tank 11A, and a cleaning machine inlet line 12d on the downstream side of the settling tank from the settling tank 11A to the fuel oil cleaning machine 21.

[0159] The settling tank upstream side cleaning machine inlet line 12c is a flow path for conveying the mixed fuel oil MO generated at the confluence point A to the mixed fuel oil inlet 11Ac of the settling tank 11A.

[0160] A cleaning machine fuel supply pump 13 is provided in the cleaning machine inlet line 12d on the downstream side of the settling tank.

[0161] So, like Fig.13 As shown, the fourth embodiment is a fuel oil mixing system 10A, which is used to generate a mixed fuel oil MO formed by mixing biodiesel fuel oil BO with mineral fuel oil FO, and generate clean fuel oil CO after cleaning the mixed fuel oil MO. The fuel oil mixing system 10A includes: a fuel oil cleaner 21, which is arranged in the ship; a storage tank 71, which stores the mineral fuel oil FO; and a second tank 41, which stores the biodiesel fuel oil BO. The fuel oil mixing system 10A supplies the mixed fuel oil MO generated by mixing the mineral fuel oil FO in the storage tank 71 and the biodiesel fuel oil BO in the second tank 41 to the fuel oil cleaner 21.

[0162] The fuel oil mixing system 10A includes the fuel oil cleaning machine 21 in the hull, and thus can further stir and mix the fuel oil MO.

[0163] In addition, the fuel oil cleaning machine 21 of the fuel oil mixing system 10A can clean the mixed fuel oil MO. In this way, the fuel oil mixing system 10A can automatically or manually mix the mineral fuel oil and the biodiesel fuel oil more efficiently, and can remove the sludge generated by the mixing. The clean fuel oil CO after cleaning the mixed fuel oil MO can be supplied to the engine or auxiliary engine of the ship for use.

[0164] The fuel oil mixing system 10A includes a settling tank 11A (mixed fuel oil storage tank) for storing the mixed fuel oil MO.

[0165] According to this configuration, a predetermined amount of the mixed fuel oil MO can be always stored in advance, so the clean fuel oil CO can be generated even during inspection or the like on the upstream side of the settling tank 11A.

[0166] Furthermore, since the fuel oil mixing system 10A includes the storage tank 71 , it is possible to store in advance a desired amount of the mineral fuel oil FO for producing the mixed fuel oil MO.

[0167] [First Modification]

[0168] It should be noted that the present invention is not limited to the first to fourth embodiments described above, and various modifications and changes can be made within the scope of the technical concept, and the present invention naturally also covers inventions after these modifications and changes.

[0169] Figure 4 The first modification of the fuel oil mixing system and the fuel oil mixing method of the present invention (more specifically, Figure 2 1A is a schematic diagram showing a modified example of the fuel oil mixing system 1A according to the second embodiment shown in FIG.

[0170] Figure 4 The fuel oil mixing system 1C shown may include a first oil heater H1 (oil heater) in the cleaning machine inlet line 12 for heating the mineral fuel oil FO or the mixed fuel oil MO.

[0171] The first oil heater H1 (oil heater) is provided downstream of the junction a (at Figure 4 In other words, the first oil heater H1 may be provided in the clean machine inlet line 12 upstream of the fuel oil switching unit 16 .

[0172] If the first oil heater H1 is disposed between the junction a and the fuel oil switching unit 16 , the mixed fuel oil MO can be heated.

[0173] According to this configuration, the first oil heater H1 (oil heater) can be used to heat the mineral fuel oil FO and the mixed fuel oil MO to reduce the viscosity of the mineral fuel oil FO and the mixed fuel oil MO, thereby improving the separation efficiency of the solid component and / or water in the fuel oil cleaning machine 21.

[0174] [Second Modification]

[0175] Figure 5The fuel oil mixing system and the fuel oil mixing method of the present invention are shown in the second modification (more specifically, Figure 3 A schematic configuration diagram of a modified example of a fuel oil mixing system 1B according to the third embodiment shown in FIG.

[0176] Figure 5 The fuel oil mixing system 1D of the second modified example shown is Figure 3 A modification of the fuel oil mixing system 1B of the third embodiment shown in FIG. The fuel oil mixing system 1D may also include a second oil heater H2 (oil heater) for heating the mineral fuel oil FO in the cleaning machine inlet line 12 (downstream cleaning machine inlet line 12b) between the cleaning machine bypass line branch point b and the mineral fuel oil switching unit 16B.

[0177] Specifically, the fuel oil mixing system 1D may include a second oil heater H2 (oil heater) for heating the mineral fuel oil FO on the upstream side of the mineral fuel oil switching unit 16B in the cleaning machine inlet line 12 .

[0178] According to this configuration, the mineral fuel oil FO can be heated by the second oil heater H2 , so that the viscosity of the mineral fuel oil FO can be reduced, and the separation efficiency of the solid content and water in the fuel oil cleaner 21 can be improved.

[0179] [Third Modification]

[0180] Figure 6 The third modified example (more specifically, Figure 2 1A is a schematic diagram showing a modified example of the fuel oil mixing system 1A according to the second embodiment shown in FIG.

[0181] Figure 6 The fuel oil mixing system 1E of the third modified example shown is Figure 2 A modification of the fuel oil mixing system 1A of the second embodiment is shown. In the fuel oil mixing system 1A, a three-way valve is used as the fuel oil switching unit 16, but the fuel oil switching unit 16 may be composed of two on-off valves 161 and 162 as in the fuel oil mixing system 1E.

[0182] In this case, the on-off valve 161 on one side is provided at the cleaning machine inlet line 12 on the downstream side of the cleaning machine second bypass line branch point c between the cleaning machine inlet line 12 and the first cleaning machine return line 17A (between the cleaning machine second bypass line branch point c and the inlet 21a of the fuel oil cleaning machine 21). In addition, the on-off valve 162 on the other side is provided at the first cleaning machine return line 17A on the downstream side of the cleaning machine second bypass line branch point c (between the cleaning machine second bypass line branch point c and the cleaning machine bypass line confluence point d of the first cleaning machine return line 17A).

[0183] According to this structure, a commercially available two-port stop valve can be adopted, and changes in the materials of piping and valves can be flexibly dealt with.

[0184] [Fourth Modification]

[0185] Figure 7 The fourth modification of the fuel oil mixing system and the fuel oil mixing method of the present invention (more specifically, Figure 3 A schematic configuration diagram of a modified example of a fuel oil mixing system 1B according to the third embodiment shown in FIG.

[0186] Figure 7 The fuel oil mixing system 1F of the fourth modified example shown is Figure 3 The fuel oil mixing system 1B of the third embodiment is shown as a modified example. In the fuel oil mixing system 1B, the mineral fuel oil switching unit 16B is a three-way valve, but it can also be composed of two switching valves 16B1 and 16B2 composed of two-way valves as in the fuel oil mixing system 1F.

[0187] In this case, the switching valve 16B1 is provided between the second cleaning machine bypass line branch point c and the junction point a of the upstream cleaning machine inlet line 12a. In addition, the switching valve 16B2 is provided between the second cleaning machine bypass line branch point c and the cleaning machine bypass line junction point d of the downstream second cleaning machine return line 17B.

[0188] Even in this configuration, the switching valves 16B1 and 16B2 of the fuel oil mixing system 1F have the same effect as the mineral fuel oil switching unit 16B composed of the three-way valve of the fuel oil mixing system 1B. That is, the fuel oil cleaning machine 21 is switched to the pipeline returning to the first tank 11 after the fuel oil cleaning machine 21 becomes a state in which the fuel oil can flow, and the fuel oil can be supplied to the second oil heater H2 (see Figure 5 ) in the case of fluid flow, the second oil heater H2 (refer to Figure 5 ) to minimize load fluctuations.

[0189] [Fifth Modification]

[0190] Figure 8 The fifth modification of the fuel oil mixing system and the fuel oil mixing method of the present invention (more specifically, Figure 3 A schematic configuration diagram of a modified example of a fuel oil mixing system 1B according to the third embodiment shown in FIG.

[0191] Figure 8 The fuel oil mixing system 1G of the fifth modified example shown is Figure 3 The fuel oil mixing system 1B of the third embodiment shown in FIG. is a modified example of the fuel oil mixing system 1A of the second embodiment (see Figure 2 ) Similarly, the fuel oil mixing system 1G may include a biodiesel fuel oil switching unit 47 composed of a shutoff valve in the biodiesel return line 46.

[0192] According to this configuration, the fuel oil mixing system 1G can circulate the biodiesel fuel oil BO in the biofuel supply line 42 to the biodiesel return line 46 when appropriate by opening and closing the valve of the biodiesel fuel oil switching unit 47. In addition, by adjusting the degree of opening of the valve of the biodiesel fuel oil switching unit 47, the flow rate of the biodiesel fuel oil BO circulating in the biodiesel return line 46 can be adjusted.

[0193] [Sixth Modification]

[0194] Fig. 9 The sixth modification of the fuel oil mixing system and the fuel oil mixing method of the present invention (more specifically, Figure 2 The fuel oil mixing system 1A of the second embodiment shown, and Figure 8 A schematic configuration diagram of the main parts of a fuel oil mixing system 1G according to a fifth modification (modification example) shown in FIG.

[0195] Fig. 9 The fuel oil mixing system 1H of the sixth modified example shown is Figure 2 The fuel oil mixing system 1A of the second embodiment shown, and Figure 8 The fuel oil mixing system 1H may include a biodiesel fuel oil switching unit 47A and a biodiesel fuel oil switching unit 47B on the downstream side of the branch point e between the biofuel supply line 42 and the biodiesel return line 46 .

[0196] The biodiesel fuel oil switching unit 47A on one side is composed of the biodiesel fuel oil switching unit 47 (see Figure 2 ) and the biodiesel fuel oil switching unit 47 of the fifth modification (refer to Figure 8) The same shutoff valve structure can be set at an appropriate position of the biodiesel return line 46. The other biodiesel fuel oil switching unit 47B is a shutoff valve set downstream of the branch point e and upstream of the biofuel supply flow meter 44 (not shown).

[0197] According to the fuel oil mixing system 1H, by opening and closing the switching valves (biodiesel fuel oil switching unit 47A, biodiesel fuel oil switching unit 47B) constituting the biodiesel fuel oil switching unit 47, the biodiesel fuel oil BO can be switched so as to circulate to the biodiesel return line 46 or flow to the biofuel supply line 42. In addition, by adjusting the degree of opening of the biodiesel fuel oil switching unit 47A, the biodiesel fuel oil switching unit 47B, the flow to the biodiesel return line 46 side and the confluence point a (see Figure 8 ) side to adjust the flow rate of biodiesel fuel oil BO.

[0198] [Seventh Modification]

[0199] Fig.10 The seventh modification of the fuel oil mixing system and the fuel oil mixing method of the present invention (more specifically, Figure 2 1A is a schematic diagram showing a modified example of the biofuel supply line 42 of the fuel-oil mixing system 1A according to the second embodiment shown in FIG.

[0200] Fig.10 The fuel oil mixing system 1I of the seventh modified example shown is Figure 2 The fuel oil mixing system 1A of the second embodiment shown is a modified example of the biofuel supply line 42. The fuel oil mixing system 1I may include a chemical supply device 5 for mixing the chemical D with the biodiesel fuel oil BO in the biofuel supply line 42.

[0201] To be further specific, the fuel oil mixing system 1I comprises: a biofuel supply pipeline 42, which is used to supply the biodiesel fuel oil BO in the second tank 41 to the cleaning machine inlet pipeline 12; and a chemical supply device 5, which is used to mix a chemical D containing at least one of an antioxidant and a pour point depressant with the biodiesel fuel oil BO flowing through the biofuel supply pipeline 42, and the chemical supply device 5 comprises: a chemical tank 51, which stores the chemical D; a chemical supply pipeline 52, which is used to supply the chemical D in the chemical tank 51 to the biofuel supply pipeline 42; and a chemical supply pump 53, which is arranged on the chemical supply pipeline 52.

[0202] like Fig.10 As shown, the upstream side of the medicine supply line 52 is connected to the lower part of the medicine tank 51 .

[0203] For example, the biodiesel return line 46 is provided with a biodiesel fuel oil switching unit 47 (see Figure 2 to Figure 8 ), the following two methods of drug supply can be implemented.

[0204] (1) The chemical D can be supplied when the biodiesel fuel oil BO is supplied to the mineral fuel oil FO.

[0205] (2) When biodiesel fuel oil BO is not supplied to mineral fuel oil FO, biodiesel fuel oil BO in biofuel supply line 42 can be returned to second tank 41 via biodiesel return line 46 to supply agent D while circulating biodiesel fuel oil BO.

[0206] According to the fuel oil mixing system 1I, the agent D containing at least one of an antioxidant and a pour point depressant can be mixed with the biodiesel fuel oil BO in the biofuel supply line 42 by the agent supply device 5. That is, according to the fuel oil mixing system 1I, oxidation of the biodiesel fuel oil BO can be prevented, or solidification (reduction in fluidity) at low temperatures can be prevented.

[0207] [Eighth Modification]

[0208] Fig.11 The eighth modification of the fuel oil mixing system and the fuel oil mixing method of the present invention (more specifically, Figure 3 1B is a schematic diagram showing a modified example of the fuel oil mixing system 1B according to the second embodiment shown in FIG.

[0209] Fig.11 The fuel oil mixing system 1J of the eighth modified example shown is Figure 3 The fuel oil mixing system 1J can also be combined with the fuel oil mixing system 1I of the seventh modification (see Fig.10 ) Similarly, the biofuel supply line 42 is provided with a drug supply device 5.

[0210] The medicine supply device 5 may include a medicine tank 51 , a medicine supply line 52 , and a medicine supply pump 53 .

[0211] The fuel oil mixing system 1J functions similarly to the fuel oil mixing system 1I of the seventh modification (see Fig.10 )Same effect.

[0212] [Ninth Modification Example]

[0213] Fig.12 The ninth modification of the fuel oil mixing system and the fuel oil mixing method of the present invention (more specifically, Fig.11A schematic configuration diagram of the main parts of a modified example of the chemical supply line 52 of the fuel-oil mixing system 1J of the eighth modified example shown.

[0214] Fig.12 The fuel oil mixing system 1K according to the ninth modified example shown may include a chemical supply device 5 in the biodiesel return line 46 .

[0215] The chemical supply device 5 of the fuel oil mixing system 1K is provided with a chemical tank 51 , a chemical supply line 52 , and a chemical supply pump 53 .

[0216] To be more specific, the fuel oil mixing system 1K includes a chemical supply device 5 for mixing a chemical D including at least one of an antioxidant and a pour point depressant with the biodiesel fuel oil BO flowing through the biodiesel return line 46. The chemical supply device 5 may include: a chemical tank 51 for storing the chemical D; a chemical supply line 52 for supplying the chemical D in the chemical tank 51 to the biodiesel return line 46; and a chemical supply pump 53 provided in the chemical supply line 52.

[0217] According to the fuel oil mixing system 1K, by providing the chemical supply device 5 , it is possible to achieve the anti-oxidation of the biodiesel fuel oil BO by the antioxidant and the prevention of solidification at low temperatures by the pour point depressant.

[0218] [Tenth Modification]

[0219] Fig.14 The fuel oil mixing system and the fuel oil mixing method of the present invention are shown in the tenth variation (more specifically, Fig.13 10A is a schematic diagram showing a modified example of a fuel oil mixing system 10A according to the fourth embodiment shown in FIG.

[0220] Fig.14 The fuel oil mixing system 10B shown in the figure is different from the fuel oil mixing system 10A of the fourth embodiment (see Fig.13 ) are different in that: it is equipped with a biodiesel return pipeline 46; it is equipped with a fuel oil return pipeline 76; it is equipped with a fuel oil switching unit 16C; it is equipped with a third cleaning machine return pipeline 17C (cleaning machine return pipeline); it is equipped with a cleaning machine bypass pipeline 18; and it is equipped with a flow adjustment unit 19A for mixed fuel oil.

[0221] The fuel oil mixing system 10B, like the fuel oil mixing system 1A of the second embodiment, includes a biodiesel return line 46. The biodiesel return line 46 is a pipe from the biofuel supply line 42 to the biodiesel tank 41 (second tank).

[0222] When the biodiesel fuel oil switching unit 45A is closed and the biodiesel fuel oil switching unit 47 is opened, if the biofuel supply pump 43 is driven, the biodiesel fuel oil BO will flow out from the biodiesel fuel oil discharge port 41a of the biodiesel tank 41 to the biofuel supply pipeline 42, and can return to the biodiesel tank 41 via the biofuel supply pump 43 of the biofuel supply pipeline 42, the biodiesel return pipeline 46, the biodiesel fuel oil switching unit 47, and the biodiesel fuel oil return port 41b.

[0223] The biodiesel fuel oil switching unit 47 and the biodiesel fuel oil switching unit 45A are electrically connected to a control device (not shown) and controlled by the control device (not shown).

[0224] It should be noted that the biodiesel fuel oil switching unit 45A may be provided between the biodiesel return line branch point e of the biofuel supply line 42 and the biofuel supply flow meter 44 .

[0225] In addition, the fuel oil mixing system 10B has a fuel oil return line 76 that branches from the fuel oil supply line 72 and reaches the storage tank 71 (first tank). The branch point g of the fuel oil return line 76 (fuel oil return line branch point g) is provided between the fuel supply pump 73 and the fuel flow meter 74. The downstream side of the fuel oil return line 76 is connected to the fuel oil inlet 71b provided at the upper part of the storage tank 71 via the fuel oil switching unit 77.

[0226] Therefore, when the fuel supply pump 73 is driven with the shutoff valve 75 closed and the fuel oil switching unit 77 opened, the mineral fuel oil FO flows out from the fuel oil discharge port 71a of the storage tank 71 to the fuel oil supply pipeline 72, and can be returned to the storage tank 71 via the fuel supply pump 73, the fuel oil return pipeline 76, the fuel oil switching unit 77, and the fuel oil inlet 71b. The fuel oil switching unit 77 and the shutoff valve 75 are electrically connected to a control device (not shown) and controlled by the control device (not shown).

[0227] It should be noted that the fuel oil switching unit 77 and the shutoff valve 75 may also be manual. In addition, the shutoff valve 75 may also be provided between the fuel oil return line branch point g of the fuel oil supply line 72 and the fuel flow meter 74 .

[0228] The fuel oil switching unit 16C is composed of, for example, a three-way valve (switching valve). The fuel oil switching unit 16C is electrically connected to a control device (not shown) and is controlled by the control device (not shown). When the fuel oil cleaning machine 21 is stopped (i.e., when the fuel oil cleaning machine 21 is not passed), the fuel oil switching unit 16C flows to the third cleaning machine return line 17C side.

[0229] It should be noted that the fuel oil switching unit 16C can be any three-way valve that switches the mixed fuel oil MO in the upstream cleaning machine inlet pipeline 12a to flow to either the third cleaning machine return pipeline 17C side or the fuel oil cleaning machine 21 side, and its setting position / setting state can be appropriately changed.

[0230] When the fuel oil cleaning machine 21 is operated, first, the cleaning machine fuel supply pump 13 is started to allow the mixed fuel oil MO to flow to the cleaning machine inlet pipeline 12 (downstream cleaning machine inlet pipeline 12b). At the same time, the fuel oil cleaning machine 21 is started and the rotation speed is increased. The mixed fuel oil MO discharged from the cleaning machine fuel supply pump 13 is returned to the settling tank 11A in full amount through the third cleaning machine return pipeline 17C. After the fuel oil cleaning machine 21 becomes a state where liquid can flow, the fuel oil switching unit 16C is switched to the fuel oil cleaning machine 21 side, and the mixed fuel oil MO is passed to the fuel oil cleaning machine 21, thereby starting the cleaning process.

[0231] It should be noted that the fuel oil cleaning machine 21 may also be configured to be operated manually.

[0232] The third cleaning machine return line 17C is a piping for returning the mixed fuel oil MO from the cleaning machine inlet line 12 on the downstream side of the cleaning machine bypass line branch point b to the settling tank 11A. The upstream side of the third cleaning machine return line 17C is connected to the fuel oil switching unit 16C, and the downstream side is connected to the mixed fuel oil inlet 11Ab of the settling tank 11A.

[0233] The cleaning machine bypass line 18 is a pipe connecting the upstream cleaning machine inlet line 12a of the cleaning machine inlet line 12 and the third cleaning machine return line 17C (cleaning machine return line). The cleaning machine bypass line branch point b is a branch point between the upstream cleaning machine inlet line 12a and the cleaning machine bypass line 18. The cleaning machine bypass line branch point b is arranged between the cleaning machine fuel supply pump 13 and the cleaning machine fuel flow meter 14 provided in the cleaning machine inlet line 12 (upstream cleaning machine inlet line 12a). The cleaning machine bypass line junction point d is a junction point between the third cleaning machine return line 17C and the cleaning machine bypass line 18.

[0234] The cleaner bypass line 18 is provided with a mixed fuel oil flow rate adjustment unit 19A.

[0235] The mixed fuel oil flow rate regulating unit 19A is constituted by a regulating valve that regulates the flow rate of the mixed fuel oil MO flowing through the cleaner bypass line 18 .

[0236] in this way, Fig.14 The fuel oil mixing system 10B shown includes: a cleaning machine inlet line 12 for supplying the mixed fuel oil MO in the settling tank 11A to the fuel oil cleaning machine 21; and a third cleaning machine return line 17C (cleaning machine return line), which is a line from the cleaning machine inlet line 12 to the settling tank 11A.

[0237] By providing the third cleaning machine return line 17C, it is possible to adjust the excess mixed fuel oil MO on the cleaning machine inlet line 12 and supply the mixed fuel oil MO at an optimum flow rate to the fuel oil cleaning machine 21 .

[0238] The fuel oil mixing system 10B is provided with a cleaning machine bypass line 18 for allowing the mixed fuel oil MO in the cleaning machine inlet line 12 to flow to the third cleaning machine return line 17C. The fuel oil mixing system 10B is provided with a fuel oil switching unit 16C on the downstream side of the branch point b, which switches the mixed fuel oil MO in the cleaning machine inlet line 12 to flow through the third cleaning machine return line 17C.

[0239] By providing the fuel oil switching unit 16C, the flow rate supplied to the fuel oil cleaning machine 21 can be adjusted to an appropriate amount.

[0240] Furthermore, the fuel oil mixing system 10B may include a mixer on the downstream side of the cleaner bypass line branch point b (branch point).

[0241] By providing a mixer (not shown) downstream of the cleaner bypass line branch point b, the biodiesel fuel oil BO in the cleaner inlet line 12 can be further mixed.

[0242] In addition, the fuel oil mixing system 10B is provided with a clean machine bypass line 18 for causing at least a portion of the mixed fuel oil MO in the clean machine inlet line 12 to flow to the third clean machine return line 17C (clean machine return line). The clean machine bypass line 18 is provided with a mixed fuel oil flow rate adjustment unit 19A for adjusting the amount of the mixed fuel oil MO flowing to the third clean machine return line 17C side.

[0243] By providing the mixed fuel oil flow rate regulating unit 19A, the flow rate of the mixed fuel oil MO supplied to the fuel oil cleaning machine 21 can be adjusted to an appropriate amount.

[0244] Furthermore, the fuel oil mixing system 10B includes a mixed fuel oil flow rate adjustment unit 19A on the discharge side of the cleaning machine fuel supply pump 13 provided in the cleaning machine inlet line 12 , so that the flow rate of the mixed fuel oil MO flowing from the cleaning machine inlet line 12 to the fuel oil cleaning machine 21 can be adjusted.

[0245] It should be noted that Fig.14 The switching unit 45A for biodiesel fuel oil shown may be provided between the biodiesel return line branch point e and the biofuel supply flow meter 44 .

[0246] The biodiesel fuel oil switching unit 47 formed of a shutoff valve may be a switching valve. The biodiesel fuel oil switching unit 47 formed of a shutoff valve can also achieve the same effect even if it is replaced by a switching valve.

[0247] Fig.14 The fuel oil switching unit 16C shown only needs to have the function of switching the mixed fuel oil MO in the cleaning machine inlet pipeline 12 (upstream cleaning machine inlet pipeline 12a) to flow to either the third cleaning machine return pipeline 17C side or the fuel oil cleaning machine 21 side, and the function, structure, type, etc. of the valve are not particularly limited.

[0248] [Eleventh Modification]

[0249] Fig.15 It is a schematic diagram showing the structure of an eleventh modified example of the fuel-oil mixing system and the fuel-oil mixing method according to the present invention.

[0250] Fig.15 The fuel oil mixing system 10C shown is Figure 4 The fuel oil mixing system 1C shown is similarly provided with a first oil heater H1 (oil heater) for heating the mixed fuel oil MO in the cleaning machine inlet line 12 .

[0251] The first oil heater H1 (oil heater) is provided between the cleaning machine bypass line branch point b of the downstream cleaning machine inlet line 12b and the fuel oil switching unit 16C.

[0252] It should be noted that the fuel oil switching unit 16C can be any three-way valve that switches the mixed fuel oil MO in the upstream cleaning machine inlet pipeline 12a to flow to either the third cleaning machine return pipeline 17C side or the fuel oil cleaning machine 21 side, and its setting position / setting state can be appropriately changed.

[0253] By providing the first oil heater H1 , the mixed fuel oil MO can be heated, so that the viscosity of the mixed fuel oil MO can be reduced, and the separation efficiency of the solid content and / or water in the fuel oil cleaning machine 21 can be improved.

[0254] [Twelfth Modification]

[0255] Fig.16 It is a schematic configuration diagram showing a twelfth modified example of the fuel-oil mixing system and the fuel-oil mixing method of the present invention.

[0256] Fig.16 The fuel oil mixing system 10D shown is Fig.14 The fuel oil switching unit 16C of the fuel oil mixing system 10B is a three-way valve, but the fuel oil switching unit 16E of the fuel oil mixing system 10D is composed of a combination of two switching valves 161E and 162E.

[0257] One switching valve 161E is provided in the downstream cleaning machine inlet line 12b (between the cleaning machine second bypass line branch point c and the inlet 21a of the fuel oil cleaning machine 21) on the downstream side of the cleaning machine second bypass line branch point c.

[0258] The other switching valve 162E is provided in the third cleaning machine return line 17C downstream of the cleaning machine second bypass line branch point c (between the cleaning machine second bypass line branch point c and the cleaning machine bypass line junction point d of the third cleaning machine return line 17C).

[0259] It should be noted that the switching valve 161E and the switching valve 162E only need to be composed of two switching valves that can switch the mixed fuel oil MO in the upstream cleaning machine inlet pipeline 12a to flow to either the third cleaning machine return pipeline 17C side or the fuel oil cleaning machine 21 side, and their setting position / setting state, etc. can be appropriately changed.

[0260] Since switching valves (on / off valves) are easily available, if the switching valves are combined to form the fuel oil switching unit 16E, it is possible to flexibly cope with changes in piping and the like.

[0261] [Thirteenth Modification]

[0262] Fig.17 It is a schematic structural diagram showing a thirteenth modified example of the fuel-oil mixing system and the fuel-oil mixing method of the present invention.

[0263] Fig.17 The fuel oil mixing system 10E shown is Fig.14 The fuel oil mixing system 10E is a modified example of the fuel oil mixing system 10B shown. The fuel oil mixing system 10E includes a chemical supply device 5. The chemical supply device 5 supplies a chemical D to the biodiesel fuel oil BO in the biofuel supply line 42.

[0264] Specifically, the agent D includes at least one of an antioxidant and a pour point depressant. The agent supply device 5 includes: an agent tank 51 storing the agent D; an agent supply line 52 for supplying the agent D in the agent tank 51 to the biofuel supply line 42; and an agent supply pump 53 provided on the agent supply line 52.

[0265] like Fig.17 As shown, the upstream side of the medicine supply line 52 is connected to the lower part of the medicine tank 51 .

[0266] For example, when the biodiesel return line 46 has the biodiesel fuel oil switching unit 47, the following two chemical supply methods can be implemented.

[0267] (1) When biodiesel fuel oil BO is supplied to mineral fuel oil FO, the chemical D is supplied.

[0268] (2) When the biodiesel fuel oil BO is not supplied to the mineral fuel oil FO, the chemical D is supplied while the biodiesel fuel oil BO in the second tank 41 is circulated through the biofuel supply line 42 and the biodiesel return line 46 .

[0269] According to the fuel oil mixing system 10E, the agent D can be mixed with the biodiesel fuel oil BO in the biofuel supply line 42 by the agent supply device 5. That is, according to the fuel oil mixing system 10E, the oxidation of the biodiesel fuel oil BO can be prevented, or the solidification (reduction in fluidity) of the biodiesel fuel oil BO at low temperatures can be prevented.

[0270] [Fourteenth Modification]

[0271] Fig.18 It is a schematic diagram showing the structure of a fourteenth modified example of the fuel-oil mixing system and the fuel-oil mixing method according to the present invention.

[0272] Fig.18 The fuel oil mixing system 10F shown in the figure includes two biodiesel tanks 41 (second tanks), two storage tanks 71 (first tanks), and two fuel oil cleaning machines 21. It should be noted that three or more biodiesel tanks 41, storage tanks 71, and fuel oil cleaning machines 21 may be provided.

[0273] The plurality of biodiesel tanks 41 are arranged on the upstream side of the biofuel supply pump 43 .

[0274] Furthermore, the plurality of storage tanks 71 are arranged on the upstream side of the fuel supply pump 73 .

[0275] In addition, a plurality of fuel oil cleaning machines 21 are arranged in parallel. A cleaning machine fuel supply pump 13 is arranged in a cleaning machine inlet line 12 d on the downstream side of the settling tank from the settling tank 11A to each fuel oil cleaning machine 21 .

[0276] If a plurality of biodiesel tanks 41 and storage tanks 71 are provided, a large amount of mineral fuel oil FO and biodiesel fuel oil BO can be stored in respective tanks on board. Therefore, even if a tank fails, other tanks can be used to supply fuel oil, which is very convenient.

[0277] Furthermore, if a plurality of fuel oil cleaning machines 21 are provided, the cleaning processing capability of the mixed fuel oil MO on board can be improved. Furthermore, even if one fuel oil cleaning machine 21 fails, the mixed fuel oil MO can be cleaned using other fuel oil cleaning machines 21 .

[0278] [Fifteenth Modification]

[0279] Fig.19 It is a schematic structural diagram showing a fifteenth modified example of the fuel-oil mixing system and the fuel-oil mixing method of the present invention.

[0280] Fig.19 The fuel oil mixing system 10G shown is relative to Fig.18 The fuel oil mixing system 10F shown in FIG. Fig.14 The fuel oil mixing system 10B shown in FIG. Fig.19 The fuel oil mixing system 10G shown includes a cleaner bypass line 18 having a flow rate adjustment unit 19A for mixing fuel oil, and a third cleaner return line 17C having a fuel oil switching unit 16C.

[0281] In the fuel oil mixing system 10G, fuel oil switching units 16C and 16C are respectively arranged in the plurality of fuel oil cleaning machine inlet lines 12 corresponding to the plurality of fuel oil cleaning machines 21. In this way, the mixed fuel oil MO supplied to each fuel oil cleaning machine 21 can be adjusted to an optimal flow rate.

[0282] It should be noted that the fuel oil switching unit 16C and the fuel oil switching unit 16C can be composed of a three-way valve that can switch the mixed fuel oil MO in the upstream cleaning machine inlet pipeline 12a to flow to either the third cleaning machine return pipeline 17C side or the fuel oil cleaning machine 21 side, and its setting position / setting state, etc. can be appropriately changed.

[0283] [Sixteenth Modification]

[0284] Fig. 20 It is a schematic structural diagram showing a sixteenth modified example of the fuel-oil mixing system and the fuel-oil mixing method of the present invention.

[0285] Fig. 20 The fuel oil mixing system 10H shown is Fig.19 In the modified example of the fuel oil mixing system 10G shown, an oil heater (second oil heater H2, second oil heater H2) for heating the mixed fuel oil MO is provided in the cleaning machine inlet line 12 (respective upstream cleaning machine inlet line 12a). A fuel oil switching unit 16C, fuel oil switching unit 16C composed of a three-way valve is provided on the downstream side of the second oil heater H2, second oil heater H2, respectively.

[0286] According to this configuration, the mixed fuel oil MO can be heated by the second oil heater H2 , so that the viscosity of the mixed fuel oil MO can be reduced, and the separation efficiency of the solid components and water in the fuel oil cleaning machine 21 can be improved.

[0287] It should be noted that the fuel oil switching unit 16C and the fuel oil switching unit 16C can be composed of a three-way valve that can switch the mixed fuel oil MO in the upstream cleaning machine inlet pipeline 12a to flow to either the third cleaning machine return pipeline 17C side or the fuel oil cleaning machine 21 side, and its setting position / setting state, etc. can be appropriately changed.

[0288] [Seventeenth Modification]

[0289] Fig.21 It is a schematic diagram showing the structure of a seventeenth modified example of the fuel-oil mixing system and the fuel-oil mixing method of the present invention.

[0290] Fig.21 The fuel oil mixing system 10I shown is Fig.16 The modified example of the fuel oil mixing system 10D shown in the figure includes a fuel oil switching unit 16E composed of two switching valves 161E and a switching valve 162E, wherein the two switching valves 161E and the switching valve 162E are composed of two-way valves.

[0291] The switching valve 161E and the switching valve 162E may be switched manually to supply the mixed fuel oil MO to the manual type fuel oil cleaning machine 21 .

[0292] It should be noted that the fuel oil switching unit 16E, the switching valve 161E of the fuel oil switching unit 16E, and the switching valve 162E can be located on the third cleaning machine return pipeline 17C side of the second bypass pipeline branch point c of the cleaning machine and the downstream cleaning machine inlet pipeline 12b, and their setting position / setting status, etc. can be appropriately changed.

[0293] [Eighteenth Modification]

[0294] Fig. 22 It is a schematic structural diagram showing an eighteenth modified example of the fuel-oil mixing system and the fuel-oil mixing method of the present invention.

[0295] Fig. 22 The fuel oil mixing system 10J shown is Fig.17 The fuel oil mixing system 10E shown is similarly equipped with the chemical supply device 5 .

[0296] The agent supply device 5 is a device for mixing the agent D with the biodiesel fuel oil BO flowing through the biofuel supply line 42. The agent supply device 5 includes: an agent tank 51 for storing the agent D; an agent supply line 52 for supplying the agent D in the agent tank 51 to the biofuel supply line 42; and an agent supply pump 53 provided on the agent supply line 52.

[0297] like Fig. 22 As shown, the upstream side of the chemical supply line 52 is connected to the lower part of the chemical tank 51. The junction point f of the chemical supply line 52 to the biofuel supply line 42 is preferably arranged upstream of the branch point e between the biofuel supply line 42 and the biodiesel return line 46.

[0298] It should be noted that the drug supply device 5 is not limited to being provided at the junction f, but may be provided between the biodiesel fuel oil switching unit 47 of the biodiesel return line 46 and the biodiesel fuel oil return port 41 b of the biodiesel tank 41 .

[0299] According to the fuel oil mixing system 10J, the chemical D can be mixed with the biodiesel fuel oil BO, so that oxidation of the biodiesel fuel oil BO can be prevented, or solidification (reduction in fluidity) of the biodiesel fuel oil BO at low temperatures can be prevented.

[0300] [Other Modifications]

[0301] The first oil heater H1 (oil heater) and the second oil heater H2 (oil heater) may be provided in the first tank 11. In addition, an oil heater may be provided in a pipe for transferring the mineral fuel oil FO from a fuel oil storage tank (not shown) to the first tank 11.

[0302] also, Figure 10 to Figure 12 The chemical supply device 5 is shown as being connected to the biofuel supply line 42 or the biodiesel return line 46 , but it may be modified as appropriate. For example, the chemical supply device 5 may be provided in the second tank 41 .

[0303] Although not shown in the figure, a mixing device such as a static mixer may be provided in the piping downstream of the junction a between the cleaning machine inlet line 12 and the biofuel supply line 42 and upstream of the fuel oil cleaning machine 21. In this way, the mineral fuel oil FO and the biodiesel fuel oil BO can be mixed more reliably.

[0304] In addition, the fuel oil cleaning machine 21 can be installed at any position as long as the mixing of the mineral fuel oil FO and the biodiesel fuel oil BO is more reliable. The fuel oil cleaning machine 21 can also be installed at the confluence point a where the mineral fuel oil FO and the biodiesel fuel oil BO are mixed, the confluence point A, the upstream cleaning machine inlet pipeline 12a, and the upstream cleaning machine inlet pipeline 12c of the settling tank.

[0305] This can shorten the overall length of the piping of the fuel oil mixing system 1 , the fuel oil mixing system 1A to the fuel oil mixing system 1K, and the fuel oil mixing system 10A to the fuel oil mixing system 10S, thereby achieving overall miniaturization.

[0306] It should be noted that, in the first embodiment, as an example of the oil cleaning unit, the case where the solid components contained in the oil are separated and cleaned by centrifugal separation based on the fuel oil cleaning machine 21 is described, but the oil can also be cleaned by filtering. As a filtering method, any method such as pressure filtration, vacuum filtration, reduced pressure filtration, gravity filtration, etc. can be used. For example, filter materials can use filter paper, filter cloth, filter screen, ceramic filter, precision filtration membrane (MF membrane (Microfiltration Membrane)), ultrafiltration membrane (UF membrane (Ultrafiltration Membrane)), hollow fiber membrane, flat membrane, etc.

[0307] In addition, a combination of a plurality of fuel oil cleaning machines such as a combination of a centrifuge and a filter device may be provided, and the cleaning units may be arranged in series or in parallel. The centrifuge and the filter may be composed of, for example, a centrifuge + a centrifuge, a centrifuge + a filter, a centrifuge + a centrifuge + a filter, etc.

[0308] In addition, the general purpose of the first tank 11 (sedimentation tank) can be listed as: the mineral fuel oil FO transferred from the fuel oil storage tank (not shown) is heated to a certain temperature by a tank heater (not shown) installed in the first tank 11, the viscosity is reduced and the tank is left to stand, thereby allowing the solid matter and water in the mineral fuel oil FO to naturally settle, and the waste water is discharged from the bottom of the first tank 11.

[0309] In addition, when the existing fuel oil mixing equipment is modified to manufacture the fuel oil mixing system 1, compared with modifying the fuel transfer equipment from the fuel oil storage tank (not shown), when modifying the fuel cleaning equipment side, the flow rate is smaller, and the piping equipment, flow meter and other components can also be small.

[0310] Description of reference numerals:

[0311] 1. 1A~1K, 10A~10J: fuel oil mixing system;

[0312] 5: Medicine supply device;

[0313] 11: The first tank (sedimentation tank);

[0314] 11A: Sedimentation tank (mixed fuel oil storage tank);

[0315] 12: Cleaning machine inlet pipeline;

[0316] 13: Cleaning machine fuel supply pump;

[0317] 16, 16C, 16D, 16E: switching unit for fuel oil;

[0318] 16B: Mineral fuel oil switching unit;

[0319] 16B1, 16B2: switching valve;

[0320] 17: Cleaning machine return line;

[0321] 17A: First cleaning machine return line (cleaning machine return line);

[0322] 17B: Second cleaning machine return line (cleaning machine return line);

[0323] 17C: Third cleaning machine return line (cleaning machine return line);

[0324] 18: Cleaning machine bypass pipeline;

[0325] 19: Flow regulating unit for mineral fuel oil;

[0326] 19A: Flow regulating unit for mixed fuel oil;

[0327] 21: Fuel oil cleaning machine;

[0328] 22: fuel cleaning oil pipeline;

[0329] 31: Service tank;

[0330] 32: Overflow pipe;

[0331] 41: Second tank (biodiesel fuel tank);

[0332] 42: Biofuel supply pipeline;

[0333] 43: Biofuel supply pump;

[0334] 44: Biofuel supply flow meter;

[0335] 45: Shut-off valve;

[0336] 45A: Switching unit for biodiesel fuel oil;

[0337] 46: Biodiesel return line;

[0338] 47: Switching unit for biodiesel fuel oil;

[0339] 47A, 47B: switching unit (switching valve) for biodiesel fuel oil;

[0340] 51: Medicine jar;

[0341] 52: pharmaceutical supply pipeline;

[0342] 53: medicine supply pump;

[0343] 71: storage tank (first tank);

[0344] 161, 162: On / off valve;

[0345] a: confluence point;

[0346] b: Branching point of the cleaning machine bypass pipeline (branching point);

[0347] BO: biodiesel fuel oil;

[0348] CO: clean fuel oil;

[0349] D: Pharmacy;

[0350] FO: mineral fuel oil;

[0351] H1: first oil heater (oil heater);

[0352] H2: Second oil heater (oil heater);

[0353] MO: Mixed fuel oil.

Claims

1. A fuel oil blending system for producing clean fuel oil by purifying a mixed fuel oil obtained by mixing biodiesel fuel oil with mineral fuel oil, wherein: The fuel oil mixing system comprises: Fuel oil cleaning machine, installed inside the ship; A first tank storing the mineral fuel oil; as well as The second tank stores the biodiesel fuel oil, The fuel oil mixing system supplies mixed fuel oil generated by mixing the mineral fuel oil in the first tank and the biodiesel fuel oil in the second tank to the fuel oil cleaning machine.

2. A fuel oil blending system for producing clean fuel oil by purifying a mixed fuel oil obtained by mixing biodiesel fuel oil with mineral fuel oil, wherein: The fuel oil mixing system comprises: Fuel oil cleaning machine, installed inside the ship; A first tank storing the mineral fuel oil; a second tank for storing the biodiesel fuel oil; a cleaning machine inlet pipeline for supplying the mineral fuel oil in the first tank to the fuel oil cleaning machine; and The biofuel supply pipeline is used to supply the biodiesel fuel oil in the second tank to the cleaning machine inlet pipeline.

3. The fuel oil mixing system according to claim 1, wherein: have: A mixed fuel oil storage tank stores mixed fuel oil produced by mixing the mineral fuel oil and the biodiesel fuel oil.

4. The fuel oil mixing system according to claim 1 or claim 2, wherein: have: Two or more of the second tank.

5. The fuel oil mixing system according to claim 1, wherein: have: Two or more of said first tanks.

6. The fuel oil mixing system according to claim 1 or claim 2, wherein: have: Two or more of the above fuel oil cleaning machines.

7. The fuel oil mixing system according to claim 1, wherein: The first tank is a storage tank.

8. The fuel oil mixing system according to claim 2, wherein: The first tank is a sedimentation tank.

9. The fuel oil mixing system according to claim 1 or claim 2, wherein: have: A service tank is provided for storing the mixed fuel oil cleaned by the fuel oil cleaning machine.

10. The fuel oil mixing system according to claim 2, wherein: have: A cleaning machine return line, the cleaning machine return line is a line from the cleaning machine inlet line to the first tank.

11. The fuel oil mixing system according to claim 3, wherein: have: a cleaning machine inlet pipeline, used to supply the mixed fuel oil in the mixed fuel oil storage tank to the fuel oil cleaning machine; and A cleaning machine return line is a line from the cleaning machine inlet line to the mixed fuel oil storage tank.

12. The fuel oil mixing system according to claim 10, wherein: A fuel oil switching unit is provided on the downstream side of the junction of the cleaning machine inlet line and the biofuel supply line. The fuel oil switching unit switches the mixed fuel oil in the cleaning machine inlet line so as to flow through the cleaning machine return line.

13. The fuel oil mixing system according to claim 11, wherein: A cleaning machine bypass line is provided for allowing the mixed fuel oil of the cleaning machine inlet line to flow to the cleaning machine return line, The fuel oil mixing system includes a fuel oil switching unit on the downstream side of the branch point between the cleaning machine inlet line and the cleaning machine bypass line, the fuel oil switching unit switching so that the mixed fuel oil in the cleaning machine inlet line flows through the cleaning machine return line.

14. The fuel oil mixing system according to claim 12, wherein: A mixer is provided downstream of the junction.

15. The fuel oil mixing system according to claim 13, wherein: A mixer is provided on the downstream side of the branch point.

16. The fuel oil mixing system according to claim 12, wherein: A mineral fuel oil flow regulating unit is provided on the upstream side of the junction of the cleaning machine inlet pipeline and the biofuel supply pipeline, and the mineral fuel oil flow regulating unit allows a portion of the mineral fuel oil in the cleaning machine inlet pipeline to flow through the cleaning machine return pipeline side.

17. The fuel oil mixing system according to claim 11, wherein: A cleaning machine bypass line is provided for allowing at least a portion of the mixed fuel oil in the cleaning machine inlet line to flow to the cleaning machine return line, The cleaning machine bypass line includes a mixed oil flow rate regulating unit that regulates the amount of the mixed fuel oil flowing to the cleaning machine return line side.

18. The fuel oil mixing system according to claim 16, wherein: The mineral fuel oil flow rate regulating unit is provided on the discharge side of a cleaning machine fuel supply pump provided in the cleaning machine inlet line.

19. The fuel oil mixing system according to claim 17, wherein: The mixed oil flow rate regulating unit is provided on the discharge side of a cleaning machine fuel supply pump provided on the cleaning machine inlet line.

20. The fuel oil mixing system according to claim 2, wherein: have: a biodiesel return line which is a line from the biofuel supply line to the second tank; and The biodiesel fuel oil switching unit switches the biodiesel fuel oil in the biofuel supply line so as to flow toward the biodiesel return line side.

21. The fuel oil mixing system according to claim 2, wherein: The cleaning machine inlet line is provided with an oil heater for heating the mixed fuel oil or the mineral fuel oil.

22. The fuel oil mixing system according to claim 11, wherein: The cleaning machine inlet line is provided with an oil heater for heating the mixed fuel oil.

23. The fuel oil mixing system according to claim 2 or claim 11, wherein: have: a biofuel supply pipeline, used to supply the biodiesel fuel oil in the second tank to the cleaning machine inlet pipeline; and a reagent supply device for mixing a reagent including at least one of an antioxidant and a pour point depressant with the biodiesel fuel oil flowing through the biofuel supply pipeline, The medicine supply device comprises: A medicine tank for storing the medicine; a medicine supply pipeline, used for supplying the medicine in the medicine tank to the biofuel supply pipeline; as well as The medicine supply pump is arranged on the medicine supply pipeline.

24. The fuel oil mixing system according to claim 20, wherein: have: a reagent supply device for mixing a reagent including at least one of an antioxidant and a pour point depressant with the biodiesel fuel oil flowing through the biodiesel return pipeline, The medicine supply device comprises: A medicine tank for storing the medicine; A reagent supply pipeline, used for supplying the reagent in the reagent tank to the biodiesel return pipeline; as well as The medicine supply pump is arranged on the medicine supply pipeline.

25. A fuel oil mixing method, comprising: producing a mixed fuel oil in a ship by mixing a biodiesel fuel oil with a mineral fuel oil, and producing a clean fuel oil by cleaning the mixed fuel oil, wherein: The biodiesel fuel oil and the mineral fuel oil are combined on the upstream side of the fuel oil cleaning machine to generate the mixed fuel oil, and the mixed fuel oil is supplied to the fuel oil cleaning machine to generate clean fuel oil.

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