JP2014084716A - Lubricant purification and supply system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lubricant purification and supply system, for a vessel which has a two-cycle diesel engine for power to propel the same and a power generation engine to drive a generator, capable of efficiently purifying and recycling the lubricant to be used by both the two-cycle diesel engine for power and the power generation engine.SOLUTION: A lubricant purification and supply system, where a filter device 24 is connected to an oil tank 25 to store lubricant to be supplied to a power generation engine 23, purifies the lubricant in the oil tank by circulating the same through the filter device. The lubricant purification and supply system also supplies the lubricant inside the oil tank to a two-cycle diesel engine for power to lubricate inside a cylinder section 4 thereof by connecting the oil tank to the cylinder section of the two-cycle diesel engine for power through an oil feed pipe 26.

Description

  The present invention relates to a lubricating oil purification and supply system for a ship equipped with a two-cycle diesel engine for power for propelling a ship and a prime mover for driving a generator, and a lubricating oil using the same. The present invention relates to a purification supply method.

  A crosshead type two-cycle diesel engine for power used in a ship has a cylinder for lubrication between a cylinder liner and a piston ring, in addition to system oil supplied for lubrication of each part in a crankcase. Oil is supplied. The cylinder oil is supplied from a supply tank that stores the cylinder oil, and is injected into the engine through an oiling nozzle provided in the cylinder liner. All of the cylinder oil supplied into the engine does not remain in the engine for lubrication, but is burned with fuel or installed downward from the inner wall surface of the cylinder liner by the reciprocating motion of the piston ring. Scraped into the lantern space.

  The cylinder oil scraped off contains a large amount of impurities such as metal powder generated by wear inside the engine and carbon generated by the combustion of fuel, and is difficult to reuse. The oil is discharged from an oil drain pipe provided in communication with the oil and discarded as drain oil. Therefore, it is necessary to always replenish the supply tank with new cylinder oil as a reduction in cylinder oil discarded as combustion or drain oil.

  However, an engine used for a ship or the like has a large output and a large size, and a large amount of cylinder oil is discarded as drain oil. If all the discarded cylinder oil is replenished with new oil, the cost increases. In addition, disposal of drain oil has a risk of causing environmental destruction.

  On the other hand, in ships, electricity necessary for mechanical control of the rudder, engine, etc. and life in the ship is generated by a plurality of generators, and diesel generators are used as generators for driving such generators. Engines and steam turbine engines are commonly used. The lubricating oil necessary to operate these power generators is supplied from the storage tank. However, if the power generator is operated for a specified period and the lubricating oil is contaminated, the old lubricating oil in the storage tank is discarded. Replaced with new lubricant.

  However, since the power generating prime mover used in ships and the like has a large output and needs to be equipped with a plurality of lubricants, the amount of stored lubricating oil is extremely large, and if it is frequently replaced, the lubricating oil to be discarded The amount of the energy becomes enormous, resulting in a problem of rising costs and environmental destruction.

  Therefore, in a limited space inside the ship, the lubricating oil used for the power two-stroke diesel engine and the power generating prime mover can be efficiently purified, and the lubricating oil can be reused without impairing the performance of the engine and the prime mover. Development of a new lubricating oil supply system that can reduce the amount of lubricating oil to be produced is required.

JP 2011-201533 A

  The present invention relates to a lubricating oil used for a power two-cycle diesel engine and a power generating prime mover in a ship including a power two-cycle diesel engine for propelling the boat and a power generating prime mover for driving a power generator. Lubricating oil purification supply system and purification supply method capable of reusing the lubricating oil without degrading the performance of the engine or the prime mover by efficiently purifying and reducing the amount of the lubricating oil to be discarded It is to provide.

  As a result of investigation by the present inventor in order to solve the above-described problem, in a ship including a two-cycle diesel engine for power for propelling a ship and a prime mover for driving a generator, By connecting the filter device to the oil tank that stores the lubricating oil to be supplied to the prime mover and circulating the lubricating oil through the filter device, the lubricating oil in the oil tank can be purified efficiently, and the oil tank and power By connecting the cylinder part of a 2-cycle diesel engine with an oil feed pipe, the lubricating oil in the oil tank is supplied as a lubricating oil for lubricating between the cylinder liner and the piston ring in the cylinder part of the 2-cycle diesel engine. The present inventors have found that this can be done and have completed the present invention.

  That is, the present invention relates to an oil storing lubricating oil to be supplied to a power generating prime mover in a ship including a power two-cycle diesel engine for propelling the ship and a power generating prime mover for driving a power generator. The filter device is connected to the tank, and the lubricating oil in the oil tank is purified by circulating the lubricating oil through the filter device, and the oil tank and the cylinder part of the power two-cycle diesel engine are connected by an oil feed pipe. A lubricating oil purifying and supplying system characterized in that the lubricating oil in an oil tank is supplied to a power two-cycle diesel engine as a lubricant for lubricating a cylinder portion of the power two-cycle diesel engine.

  Further, according to the present invention, a lantern space installed below a cylinder liner of a power two-cycle diesel engine and an oil tank are connected by an oil feed pipe, and lubricating oil supplied from the oil tank to the power two-cycle diesel engine is supplied. The lubricating oil purification and supply system is characterized in that the lubricating oil is circulated by collecting it from the lantern space into the oil tank.

  Furthermore, the present invention relates to a crankcase part of a power two-cycle diesel engine and an oil tank, and the lubricating oil in the oil tank is used as a lubricating oil for lubricating the crankcase part of the power two-cycle diesel engine. A lubricating oil purification and supply system, characterized in that it is supplied to a two-cycle diesel engine for power.

  Furthermore, the present invention is a filter device in which the filter device removes the impurities contained in the lubricant by adhering to the surface of the paper by allowing the lubricant to flow between a number of thin papers arranged in parallel. A lubricating oil purification and supply system characterized by the above.

  Furthermore, the present invention can recover the lubricating oil adhering to the exhaust pipe of the power two-cycle diesel engine in the oil tank, purify it in the oil tank together with the lubricating oil recovered from the lantern space, and re-supply the power two-cycle diesel This is a lubricant supply system for lubricating oil.

  The present invention also provides an oil storing lubricating oil to be supplied to a power generating prime mover in a ship comprising a power two-cycle diesel engine for propelling the ship and a power generating prime mover for driving a power generator. The filter device is connected to the tank, and the lubricating oil in the oil tank is purified by circulating the lubricating oil through the filter device, and the oil tank and the cylinder part of the power two-cycle diesel engine are connected by an oil feed pipe. According to another aspect of the present invention, there is provided a method for purifying and supplying lubricating oil, characterized in that lubricating oil in an oil tank is supplied to a power two-cycle diesel engine as lubricating oil for lubricating a cylinder portion of the power two-cycle diesel engine.

  Further, according to the present invention, a lantern space installed below a cylinder liner of a power two-cycle diesel engine and an oil tank are connected by an oil feed pipe, and lubricating oil supplied to the power two-cycle diesel engine is supplied to the lantern space. The lubricating oil is purified and supplied by circulating the lubricating oil to the oil tank.

  Furthermore, the present invention relates to a crankcase part of a power two-cycle diesel engine and an oil tank, and the lubricating oil in the oil tank is used as a lubricating oil for lubricating the crankcase part of the power two-cycle diesel engine. A method for purifying and supplying lubricating oil, characterized by being supplied to a power two-cycle diesel engine.

  Furthermore, the present invention is a filter device in which the filter device removes the impurities contained in the lubricant by adhering to the surface of the paper by allowing the lubricant to flow between a number of thin papers arranged in parallel. This is a method for purifying and supplying lubricating oil.

  Furthermore, the present invention can recover the lubricating oil adhering to the exhaust pipe of the power two-cycle diesel engine in the oil tank, purify it in the oil tank together with the lubricating oil recovered from the lantern space, and re-supply the power two-cycle diesel This is a lubricating oil supply method for lubricating oil.

  In a ship equipped with a power two-cycle diesel engine for propelling a ship and a generator for driving a generator, a filter device is connected to an oil tank storing lubricating oil of the generator for generating power. The lubricating oil in the oil tank can be efficiently purified by circulating the lubricating oil through the apparatus.

  Then, by connecting the oil tank and the cylinder portion of the power two-cycle diesel by the oil feed pipe, the lubricating oil in the oil tank is connected to the cylinder liner and the piston ring in the cylinder portion of the power two-cycle diesel engine. It can be supplied as a lubricating oil for lubricating the gap.

  Also, by connecting the lantern space installed below the cylinder liner of the power two-cycle diesel engine and the oil tank with an oil feed pipe, the lubricating oil supplied from the oil tank to the power two-cycle diesel engine is It can be recovered from the lantern space and returned to the oil pan, and the lubricating oil can be circulated without waste.

  Further, by connecting the oil tank and the crankcase part of the power two-cycle diesel engine, the lubricating oil in the oil tank is supplied as the lubricating oil for lubricating the inside of the crankcase part of the two-cycle diesel engine. Can do.

  As described above, according to the lubricating oil purification supply system or the purification supply method of the present invention, the lubricating oil used for the power generating prime mover and the power two-cycle diesel engine is efficiently purified in a limited space in the ship. The lubricating oil can be smoothly reused without impairing the performance of the prime mover or the engine, and the amount of lubricating oil to be discarded can be reduced.

Schematic diagram showing a lubricating oil purification and supply system of the present invention (first embodiment) Schematic diagram showing a lubricating oil purification and supply system of the present invention (second embodiment) Conceptual diagram showing the structure of a crosshead type two-cycle diesel engine

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

  The present invention relates to a lubricating oil for a power generating prime mover (23) in a ship comprising a power two-cycle diesel engine (1) for propelling the ship and a power generating prime mover (23) for driving a power generator. The filter device (24) is connected to the oil tank (25) in which the oil is stored, and the lubricating oil (19) in the oil tank (25) is purified by circulating the lubricating oil (19) through the filter device (24). At the same time, the oil tank (25) and the cylinder part (4) of the power two-cycle diesel (1) are connected by an oil feed pipe (26a, 26b) equipped with a pump (P) for pumping lubricating oil. This is a lubricating oil purification and supply system that supplies the lubricating oil in the oil tank to the two-cycle diesel engine (1) as lubricating oil (cylinder oil) for lubricating the inside of the cylinder part (4) (FIG. 1).

  FIG. 3 shows an example of a crosshead type two-cycle diesel engine serving as a propulsion power source for a ship. The piston (2) and the piston ring (3) externally fitted to the piston (2) are reciprocated up and down in the cylinder liner (4b). The piston rod (6) extending from the lower end of the piston (2) is rotatably connected to the cross head (8) at the upper end of the connecting rod (7), and the lower end of the connecting rod (7). Is rotatably attached to the tip of the eccentric arm portion (9a) of the crankshaft (9). The up and down reciprocating sliding of the piston (2) is converted into a rotational motion of the crankshaft (9) through the piston rod (6), the cross head (8), and the connecting rod (7) and outputted.

  The cylinder liner (4b) is fixed to the cylinder jacket (5) and installed at the upper part of the crankcase (10). A cylinder cover (4a) including an exhaust valve (11) for discharging exhaust gas is attached to the upper portion of the cylinder liner (4b).

  The bottom of the cylinder jacket (5) is slidably sealed by the piston stuffing box (12) and the piston rod (6) is slidable. The lantern collects the lubricating oil (cylinder oil) scraped off by the reciprocating motion of the piston (2). A space (13) is formed. When the piston (2) descends, the air taken into the lantern space (13) from the intake port (14) on the side of the cylinder jacket (5) is sucked into the cylinder liner (4b) through the scavenging hole (15), and the piston ( It is compressed and burned with fuel by the rise of 2). The exhaust gas generated by the combustion passes through the exhaust valve (11) and is discharged to the exhaust pipe (17) (FIG. 3).

  The cylinder liner (4b) is provided with an oiling nozzle (16) so that the lubricating oil (19) for lubricating the cylinder liner (4b) and the piston ring (3) is fed from the supply tank (20). (Fig. 3). Here, the lubricating oil (19) in the supply tank (20) is obtained by transferring the lubricating oil in the oil tank (25) stored for lubricating the generator prime mover (23) (FIG. 1).

  As the lubricating oil supplied to each part in the crankcase part (10), a lubricating oil (21) called system oil is generally used. Lubricating oil (system oil) (21) stored in the oil pan (22) is sucked up by the pump (P) and supplied to each part in the crankcase part (10), and then again into the oil pan (22). Collected. In this way, the lubricating oil (system oil) (21) circulates between the oil pan (22) and the clan case part (10) (FIG. 1).

  A four-cycle diesel engine or a steam turbine engine is generally used as the power generating prime mover (23) for driving the power generator, but lubricating oil is required for these to operate. Depending on the size of the ship, several generators are provided, and a large amount of lubricating oil (19) is stored in the oil tank (25) and circulates between each generator (23). (Figure 1).

  The present invention circulates and purifies the lubricating oil (19) stored in the oil tank (25) for lubrication of the power generating prime mover (23) through the filter device (24) connected to the oil tank (25), and The purified lubricating oil in the oil tank is transferred to the cylinder part (4) of the two-cycle diesel engine (1) by the oil supply pipe (26a, 26b) equipped with the pump (P), and the cylinder liner (4b) and the piston ring (3) is supplied as lubricating oil (cylinder oil) for lubrication.

  In this way, the lubricating oil (19) used for the generator (23) for power generation and the two-cycle diesel engine (1) is stored in a common oil tank (25) and purified so that it is a limited space like a ship. The lubricating oil used in the power generating prime mover (23) and the power two-cycle diesel engine (1) can be efficiently purified, and the lubricating oil can be smoothly supplied without impairing the performance of the prime mover or the engine. In addition, since purification by the filter device (24) is performed by circulating lubricating oil in a different circulation route from the supply route to the generator (23) and the two-cycle diesel engine (1), the ship is sailing or anchored. Regardless of the inside, it is possible to purify the lubricating oil.

  Fig. 1 shows that the lubricating oil (19) is not supplied directly from the oil tank (25) to the cylinder part (4), but after the lubricating oil (19) of the oil tank (25) is temporarily stored in the supply tank (20). The embodiment which supplies to a cylinder part (4) is shown. This means that it takes a certain amount of time to purify the lubricating oil in the oil tank, so that it is possible to always supply the lubricating oil in the supply tank (20) into the two-cycle diesel engine without waiting for the purification work. However, depending on the purification capacity of the filter device (24), the time required for purification is not particularly required, and the oil tank (25) can always be maintained in a purified state. The supply oil (19) can be eliminated and the lubricating oil (19) can be directly supplied from the oil tank (25) to the cylinder part (4). Therefore, the supply tank (20) is not always necessary equipment.

  The pump (P) is arranged in the middle of the piping for pumping the lubricating oil in the oil tank (25). FIG. 1 shows an example of this, but the lubricating oil is smoothly transferred. 1 is not limited to the embodiment shown in FIG. 1, and the arrangement of the pumps may be adjusted as appropriate depending on the length and thickness of the oil feeding pipe.

  The lubricating oil (19) supplied from the oiling nozzle (16) of the cylinder part (4) is burned together with the fuel or scraped off into the lantern space (13) by the reciprocating motion of the piston (2). The lubricating oil (cylinder oil) that has been scraped off contains a large amount of metal powder generated by wear inside the engine and carbon generated after combustion of the fuel and is difficult to reuse. The oil was discharged from an oil drain pipe (18) provided in communication with the lantern space (13) and discarded as drain oil.

  As shown in FIG. 1, the purification supply system of the present invention connects an oil drain pipe (oil feed pipe) (18) extending from a lantern space (13) to an oil tank (25), and the oil tank and a power two-cycle diesel engine. (1) forms a circulation path, and the scraped lubricating oil is collected in the oil tank (25) and purified together with the lubricating oil in the oil tank. The lubricating oil thus purified can be supplied and reused as the lubricating oil for the power generating prime mover (23) or the power two-cycle diesel engine (1).

  Lubricating oil is collected by connecting an oil drain pipe (oil feed pipe) (18) extending from the lantern space (13) to the oil tank (25), and a filter device is provided in the middle of the oil drain pipe (oil feed pipe) (18). If the lubricating oil is preliminarily purified before it is transferred to the oil tank (25), the lubricating oil in the oil tank is prevented from being contaminated by the recovered lubricating oil. Can do.

  Lubricating oil (cylinder oil) recovered from the lantern space (13) contains water generated by the combustion of the fuel, so it is necessary to remove the water by methods such as sedimentation and centrifugation. The tank (25) circulates lubricating oil (19) with the generator (23) for power generation, and the heat generated by the generator (23) is also conducted to the lubricant in the oil tank (25). Therefore, the inside of the oil tank is usually kept at about 110 to 120 ° C. For this reason, the recovered lubricating oil is heated in the oil tank (25), the contained water can be evaporated, and the lubricating performance can be efficiently recovered.

  Part of the lubricating oil (cylinder oil) supplied into the engine passes through the exhaust valve (11) together with the exhaust gas and adheres to the exhaust pipe (17). The lubricating oil (cylinder oil) adhering to the exhaust pipe (17) in this way has been discarded in the past, but along with the lubricating oil (cylinder oil) (19) recovered from the lantern space (13), the oil drain pipe ( If the oil is recovered in the oil tank (25) via the oil supply pipe (18), it can be purified and reused in the oil tank (25) (FIG. 1).

  As described above, according to the purification and supply system of the present invention, the lubricating oil (cylinder oil) that has been conventionally discarded can be collected and purified in the oil tank and supplied again as the lubricating oil. The influence can be reduced and the amount of new lubricating oil (27) to be replenished can be reduced, and the cost can be kept low.

  In addition to lubricating action, the lubricating oil functions as an acid neutralizing action that neutralizes the acid generated by combustion, a dispersing action that disperses carbon and heat-degraded products due to combustion in oil, and a solubilization that dissolves in oil. There is an effect. The acid neutralizing action of the lubricating oil is adjusted by an additive blended in the lubricating oil, and the acid neutralizing ability of the lubricating oil is shown as a total basic number (TBN). Depending on the sulfur content of the fuel, etc., a suitable TBN lubricating oil should be used. However, since the sulfur content of the fuel varies, depending on the amount of sulfuric acid produced during combustion, It is necessary to adjust and use a TBN lubricating oil suitable for neutralizing it. For example, when the sulfur contained in the fuel has a high concentration such as 3% or more, it is necessary to supply the lubricating oil (lubricant) of TBN70. In such a case, for example, FIG. By supplying the lubricating oil (lubricant) (29) of TBN70 to the supply tank (20) shown, it can be supplied into the two-cycle diesel engine (1), and the inside of the engine can be effectively neutralized.

  The filter device (24) is for performing microfiltration of lubricating oil.For example, using a microfiltration device using a filter element in which a number of thin papers are laminated, engine wear mixed in the lubricating oil. It is preferable to remove fine particles such as carbon powder generated by combustion of fuel and carbon generated by the above process by attaching them to paper fibers using Brownian motion. Such a microfiltration device is disclosed in Japanese Patent Application Laid-Open No. 11-257038, and includes a filter element in which a large number of thin papers such as tissue papers are laminated. Impurities such as metal powder and carbon contained in are adhered to paper fibers by the Brownian motion of fine particles, and impurities of 1 μm or more can be effectively removed.

  The filter element may have a structure in which long paper is wound in the form of toilet paper, or may be a stack of a large number of papers cut into a disk shape. Filtration with such a microfiltration means is achieved by the impurities mixed in the lubricating oil moving in the oil by Brownian motion and adhering to the paper fibers. Therefore, in order to achieve effective filtration of impurities, it is required that the impurities be in a state that can exhibit a sufficient Brownian motion in oil. As a result of experiments and tests by the present inventors, it has been found that the concentration of impurities present in oil is 0.5% or less in order for the impurities to exhibit sufficient Brownian motion in the oil. If there is a higher proportion of insoluble matter than this, the Brownian motion of impurities in the oil will be reduced, the movement of impurities adhering to the engine inner wall etc. into the oil will be reduced, and impurities present in the oil The amount of movement of the ink also decreases, the amount of paper adhering to the fibers decreases, and the filtration efficiency decreases.

  For this reason, when the impurity concentration is high, it is preferable to remove impurities by a centrifuge before purification by the filter device (24) or in parallel with the purification by the filter device (24). In FIG. 1, a centrifuge (28) is installed in the lubricating oil circulation path to which the filter device (24) is connected, and a path for removing impurities by centrifugation in advance before purification by the filter device is shown. . Since the centrifuge (28) is suitable for removing relatively large impurities of 10 μm or more contained in the lubricating oil, the clogging of the filter can be reduced and the impurity removal efficiency of the filter device can be increased. Can do.

  The purification of the lubricating oil by the filter device is preferably adjusted so that the n-pentane insoluble matter contained in the lubricating oil is 0.01 to 0.2%. If the lubricating oil is within this range, troubles in the friction portion of the engine can be prevented, and periodic replacement of the lubricating oil becomes unnecessary.

  As the lubricating oil supplied to each part in the crankcase part (10), a lubricating oil (21) called system oil is generally used. As shown in FIG. 1, the lubricating oil (system oil) (21) is usually stored in the oil pan (22), and the lubricating oil (system oil) (21) is sucked up by the pump (P) and cranked. After being supplied to each part in the case part (10), it is collected in the oil pan (22). Thus, the lubricating oil (system oil) (21) circulates between the oil pan (22) and the clan case (10).

  Fig. 2 shows the connection between the crankcase (10) of a power two-stroke diesel engine and the oil tank (25), and the lubricating oil (19) in the oil tank (25) is used in the crankcase of the power two-stroke diesel engine. The embodiment which supplies as lubricating oil for lubricating the inside of a part (10) is shown. The connection between the crankcase part (10) and the oil tank (25) of a power two-cycle diesel engine differs depending on the supply method (wet sump method or dry sump method, etc.) for supplying lubricating oil into the crankcase part. It can be performed by joining the case part (10) and the oil tank (25) or connecting the crankcase part (10) and the oil tank (25) with an oil feed pipe (10a). In the embodiment of FIG. 2, the crankcase section (10) and the oil tank (25) are connected by an oil feeding pipe (10a) having a pump mechanism for pumping lubricating oil.

  In the embodiment shown in FIG. 2, the oil tank (25) is located between the generator for power generation (23), the filter device (24), the cylinder part (4) of the two-cycle diesel engine, and the crankcase part (10). Each of them forms a lubricating oil circulation path, and purification of the lubricating oil by the filter device (24) can be performed regardless of whether the power generator (23) or the two-cycle diesel engine (1) is driven or stopped. . Also, the lubricating oil (19) in the oil tank (25) purified by the filter device (24) is efficiently supplied to the generator (23) and the two-cycle diesel engine (1) through the respective circulation paths. And recovered.

  As described above, according to the purification supply system of the present invention, the lubricating oil used in the power generating prime mover and the power two-cycle diesel engine is efficiently purified in a limited space such as in a ship. Lubricating oil can be smoothly reused without impairing performance, and the amount of lubricating oil to be discarded can be reduced.

P Pump Pf Cleaner (Centrifuge)
DESCRIPTION OF SYMBOLS 1 2 cycle diesel engine 2 Piston 3 Piston ring 4 Cylinder part 4a Cylinder cover 4b Cylinder liner 5 Cylinder jacket 6 Piston rod 7 Connecting rod 8 Crosshead 9 Crankshaft 9a Arm part 10 Crankcase part 10a Oil supply pipe 11 Exhaust valve 12 Piston stuffing Box 13 Lantern space 14 Air inlet 15 Scavenging hole 16 Lubrication nozzle 17 Exhaust pipe 18 Oil drain pipe (oil feed pipe)
19 Lubricating oil (cylinder oil)
20 Supply tank 21 Lubricating oil (system oil)
22 Oil pan (system oil storage tank)
22a Oil supply pipe 23 Generator motor 23a Oil supply pipe 24 Filter device 24a Oil supply pipe 25 Oil tank (purification tank)
26 Oil feed pipe 26a Oil feed pipe 26b Oil feed pipe 27 New lubricating oil 28 Centrifuge 29 Lubricating oil (lubricant)

Claims (10)

  In a ship equipped with a power two-cycle diesel engine for propelling a ship and a generator for driving a generator, a filter device is provided in an oil tank for storing lubricating oil to be supplied to the generator for generating power. Connect and circulate the lubricating oil through the filter device to purify the lubricating oil in the oil tank, and connect the oil tank and the cylinder part of the power two-cycle diesel with an oil feed pipe to lubricate the oil tank. A lubricating oil purification and supply system, characterized in that oil is supplied to a power two-cycle diesel engine as lubricating oil for lubricating the inside of a cylinder portion of the power two-cycle diesel engine.   The lantern space installed under the cylinder liner of the two-cycle diesel engine for power and the oil tank are connected by an oil feed pipe, and the lubricating oil supplied from the oil tank to the two-cycle diesel engine for power is oiled from the lantern space. 2. The lubricating oil purification and supply system according to claim 1, wherein the lubricating oil is circulated by being collected in a tank.   Two-cycle diesel for power is connected as a crankcase part of a two-cycle diesel engine for power and an oil tank, and the lubricating oil in the oil tank is lubricated to lubricate the crankcase part of the two-cycle diesel engine for power. 3. The lubricating oil purification and supply system according to claim 1, wherein the system is supplied to an engine.   The filter device is a filter device that removes the impurities contained in the lubricating oil by adhering to the surface of the paper by allowing the lubricating oil to flow between a plurality of thin papers arranged in parallel. Item 4. The lubricating oil purification supply system according to any one of Items 1 to 3.   Lubricating oil adhering to the exhaust pipe of a power two-cycle diesel engine is recovered in an oil tank, purified in the oil tank together with the lubricating oil recovered from the lantern space, and re-supplied to the power two-cycle diesel The purification supply system for lubricating oil according to any one of claims 2 to 4.   In a ship equipped with a power two-cycle diesel engine for propelling a ship and a generator for driving a generator, a filter device is provided in an oil tank storing lubricating oil to be supplied to the generator for generating power. Connect and circulate the lubricating oil through the filter device to purify the lubricating oil in the oil tank, and connect the oil tank and the cylinder part of the power two-cycle diesel with an oil feed pipe to lubricate the oil tank. A method for purifying and supplying lubricating oil, characterized in that the oil is supplied to a power two-cycle diesel engine as lubricating oil for lubricating the inside of a cylinder portion of the power two-cycle diesel engine.   The lantern space installed under the cylinder liner of the two-cycle diesel engine for power and the oil tank are connected by an oil feed pipe, and the lubricating oil supplied from the oil tank to the two-cycle diesel engine for power is oiled from the lantern space. 7. The method for purifying and supplying lubricating oil according to claim 6, wherein the lubricating oil is circulated by collecting it into the tank.   Two-cycle diesel for power is connected as a crankcase part of a two-cycle diesel engine for power and an oil tank, and the lubricating oil in the oil tank is lubricated to lubricate the crankcase part of the two-cycle diesel engine for power. The method for purifying and supplying lubricating oil according to claim 6 or 7, wherein the lubricating oil is supplied to an engine.   The filter device is a filter device that removes the impurities contained in the lubricating oil by adhering to the surface of the paper by allowing the lubricating oil to flow between a plurality of thin papers arranged in parallel. Item 9. A method for purifying and supplying lubricating oil according to any one of Items 6 to 8.   Lubricating oil adhering to the exhaust pipe of a power two-cycle diesel engine is recovered in an oil tank, purified in the oil tank together with the lubricating oil recovered from the lantern space, and re-supplied to the power two-cycle diesel A method for purifying and supplying lubricating oil according to any one of claims 7 to 9.

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