JP2013224218A - Land side facilities for polymer pellet carrier and carrying barge - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide land side facilities for a polymer pellet carrier and a carrying barge, capable of simultaneously and efficiently transporting a large quantity of many kinds of polymer pellets without mixing them.SOLUTION: Land side facilities for a polymer pellet carrier and a carrying barge includes: land side cargo silos for storing polymer pellets P stored in cargo holds 10 of the polymer pellet carrier 1 or the carrying barge; a land side cargo unloading line 120 for receiving the polymer pellets P from cargo unloading lines 42, 42P and 42S of the polymer pellet carrier 1 or the carrying barge in unloading cargoes; a land side air supply line 130 for supplying cargo unloading compressed air A to a cargo unloading air supply line 51 of the polymer pellet carrier 1 or the carrying barge in unloading the cargoes; and a land side compressed air-generating device for supplying the cargo unloading air A to the land side air supply line 130.

Description

  According to the present invention, in the prior art, it is possible to transport polymer pellets and the like that have been transported by packing in a bag in order to avoid damage and contamination, and to transport many types of polymer pellets in large quantities at the same time. The present invention relates to the equipment on the land side for a polymer pellet carrier ship and a barge for transportation that can be efficiently transported.

  In the prior art, when polymer pellets are transported by sea on a ship, the polymer pellets are packed in a bag, and a container equipped with this bag is transported on a container ship.

  This polymer pellet consists of low density polyethylene (specific gravity about 0.92) manufactured at high pressure, high density polyethylene (specific gravity about 0.95) manufactured at low pressure, and transparent, crystalline (95%) polypropylene. What is called a polymer having a specific gravity of about 0.9 is formed in a pellet shape having a size of about φ3 mm × L3 mm to φ6 mm × L6 mm. As for the physical properties of the polymer pellet, the specific gravity is about 0.9 to 1.0, the bulk specific gravity is relatively light, about 0.5, and the angle of repose is about 30 degrees.

  This polymer is produced as follows. In the oil refining industry, crude oil is distilled and divided into petroleum gas, gasoline, naphtha (crude gasoline), kerosene, light oil, heavy oil, and asphalt according to the difference in boiling point. Of these, naphtha is thermally decomposed with a naphtha cracker. Then, the substance is changed to a substance having a simple structure and extracted for each substance such as ethylene, propylene and butylene. Polymers (polymers) such as polyethylene and polypropylene having different properties are produced by a chemical reaction that combines molecules of the same substance with ethylene and propylene.

  Due to the combustibility of this polymer, there is a possibility that an explosion mixture is formed in the dust state and may become dangerous, but in the pellet state, there is no danger in handling at room temperature, and it is physiologically unfriendly. It is active and has no special toxicity to the human body. In addition, there is no reactivity with water, self-reactivity or explosiveness, and it is stable at room temperature. However, if pellets are spilled, they may slip and fall over, preventing leakage and leakage. Time recovery is important. In particular, if it leaks into the water area during transportation, it is necessary to be careful as it may suffocate if the animal is swallowed.

  In the case of many polymers, if the surface is molded with moisture on it, product surface defects, appearance defects, mechanical property (strength) defects, and the like occur. In addition, since the fine polymer crushed by the damage of the pellet becomes a contamination, the damage of the surface of the pellet is also disliked, so that the pellet wear on the inner surface of the pipe or cargo hold should be avoided to prevent the defect of the pellet surface. desirable.

  In particular, there are a large number of types depending on differences in material components, materials, colors, etc., and mixing different types of polymer pellets will lead to a decrease in the quality of products using polymer pellets. It is necessary not only to avoid mixing with paint and rust, but also to strictly avoid mixing between different types of polymer pellets. Therefore, as described above, in the prior art, the polymer pellets are packed in a bag and the containers carrying the bags are transported by container ship on a container ship.

  However, in this transport method using a bag and a container, manual and manual operations are required for bagging pellets, storing them in a container, breaking bags for opening, removing pellets from bags, etc. There is a problem that work by a machine is required and efficiency is low. In particular, in terms of ensuring traceability (trackability), it is necessary to manage each bag of pellets, and there is a problem that it becomes very complicated.

  In addition, there is a problem that packaging materials such as bags used for carrying pellets in small quantities are a waste of resources. In the future, the demand for polymer pellets will continue to increase worldwide, and an efficient sea transportation method is desired in the industry.

  Generally, a ship that carries coal, wheat, chips, etc. in bulk is called a dry cargo bulk carrier or a bulk carrier, and the structure of the cargo hold is usually a double bottom inner bottom plate. Surrounded by ship side shell, upper deck, bulkhead, hopper side tank is provided below the ship side, top side tank is provided above the ship side, hatch is opened on the upper deck, and is covered with a hatch cover It has a structure (for example, see Patent Document 1).

  In addition, when unloading bulk cargo from the lower part of the cargo hold, the bulk cargo (bulk) cut from the lower end of each cargo hold is transferred to the bow by an endless cutout conveyor that extends in the longitudinal direction of the ship. It is conveyed to the side or the stern side, transferred to another conveyor, and conveyed to the conveyor of the land handling facility (for example, refer to Patent Document 2).

  However, with regard to the transportation of polymer pellets, it is necessary to load and transport various types of polymer pellets without mixing them in a very small amount compared to the loading capacity of the ship, and with strict quality control, manufacturing, There is a problem that it is required to manage traceability (trackability) for each lot from storage before shipment, transportation, storage after unloading, and consumption.

Japanese Utility Model Publication No. 62-165193 JP-A-5-124576

  The present invention has been made in view of the above-mentioned situation, and the object thereof is to efficiently transport a large variety of polymer pellets not only by bagging but by bulk transportation, and many It is an object of the present invention to provide an equipment on the shore side for a polymer pellet carrier ship and a barge for transportation that can efficiently and efficiently transport various types of polymer pellets simultaneously.

  In order to achieve the above object, the facility on the shore side for the polymer pellet carrier and the transport barge of the present invention is a land-side facility for accommodating the polymer pellets contained in the cargo hold of the polymer pellet carrier or the transport barge. A freight silo, a land-side freight line that receives polymer pellets from the freight line of the polymer pellet carrier ship or barge during unloading, and a supply air for the polymer pellet carrier ship or barge during unloading A land-side air supply line for supplying compressed air for unloading to the line, and a land-side compressed air generator for supplying the air for unloading to the land-side air supply line. The

  According to this structure, since the air for transportation supplied from the land side can be used, the polymer pellets of each cargo hold of the polymer pellet carrier ship or the transportation barge can be unloaded by pneumatic transportation. On the upper side of the pellet carrier or the carrier barge, it is not necessary to provide a number of compressed air generators for lifted cargo corresponding to the number of cargo handling lines. Therefore, onboard equipment can be reduced.

  In addition, in the entire system including the ship upper side and the land side, the compressed air generating equipment that requires a large capacity as a whole is installed on the land side, so that it is easy to perform installation work and maintenance inspection. Moreover, since the operating rate of the compressed air generator on the land side increases, the compressed air generator can be used efficiently. Moreover, by installing a compressed air generator on the land side, it can also be used for transfer between land-side freight silos and polymer pellets transported from the manufacturing plant to land-side freight silos. .

  Further, in the above-mentioned equipment on the land side for the polymer pellet carrier and the transport barge, when the apparatus for controlling the lifting and handling equipment in the polymer pellet carrier or the transport barge is provided on the land side, Since the control device for the lifting line on the ship is provided on the land side, the number of the control devices for the lifting line can be reduced as a whole system.

  On the other hand, in a ship having a piping line such as a tanker, this polymer is used for controlling the unloading line on the ship side by using the ship side control device and unloading the cargo from the ship upper side to the land side. The land-side equipment for pellet carriers and barges also uses the land-side control device to control the unloading line on the ship side on the land side. The correspondence with the hold or lot hold set can be centrally managed on the land side, which can significantly improve the quality control of polymer pellets, ensuring traceability and avoiding mistakes in handling operations.

  Further, in the above-mentioned equipment on the land side for the polymer pellet carrier and the transport barge, the land-side air discharge line that receives the air returning from the polymer pellet carrier or the transport barge, and the air on the land side Used for transportation discharged from the cargo hold when it is provided with a discharge air purification device that removes polymer pellet fragments in the air returning from the polymer pellet carrier ship or barge provided in the discharge line. The air A mixed with dust and the like can be purified by the exhaust air purification device and discharged into the atmosphere.

  Further, in the above-mentioned equipment on the land side for the polymer pellet carrier and the transport barge, the compressed air generator installed on the land side is transported between the land-side cargo silos or transported from the manufacturing plant. If the polymer pellets are used for either or both of the transfer to the land-side freight silo, the operation rate of the land-side compressed air generator can be increased and used efficiently.

  Moreover, in the above-mentioned equipment for the land side for the polymer pellet carrier and the transport barge, a land-side loading line for loading polymer pellets is provided on the cargo hold of the polymer pellet carrier or the transport barge. When configured, cargo handling is also possible.

  Further, in the above-mentioned equipment on the land side for the polymer pellet carrier and the transport barge, different types of polymer pellets accommodated for each cargo hold of the polymer pellet carrier or the transport barge are mixed without being mixed. If the above-mentioned cargo silo on the land side is provided, the mixing of different types of polymer pellets can be avoided, and it can be managed finely in transportation, unloading, storage on land, etc. Administrative traceability can be significantly improved.

  And it is preferable that the polymer pellet carrier ship or the carrier barge used in the facility on the land side for this polymer pellet carrier ship and the carrier barge, and its cargo handling method are configured as follows.

  This polymer pellet carrier is a polymer pellet carrier that transports multiple types of polymer pellets without mixing them, and forms a hold set for lots by combining multiple cargo holds that contain polymer pellets. Using a freight loading line connected to a loading line, a first freight handling for simultaneously loading the same type of polymer pellets for each lot hold set and a different type of polymer pellet for each freight hold In order to selectively perform the second unloading and unloading, a holding lifting line having a holding lifting opening / closing valve is connected to the lower part of each of the cargo holdings, and the lot holding For each set, the hold lifting line is integrated into the lot lifting line, and the cargo ho In de of the lower hold unloading line, and provided with a quantitative discharge valve below the hold unloading off valve, the provision of an on-off valve on the underside of the constant emission valve as features.

  According to this configuration, when lifting and unloading, by appropriately controlling the opening / closing valve for holding and the like, the type of polymer pellets stored in the cargo hold is the same for each lot hold set, By using the first lifting / unloading, the entire cargo hold of the same lot hold set can be simultaneously lifted / loaded, and the same type of polymer pellets can be efficiently accommodated in the land-side cargo silo.

  Moreover, when the kind of polymer pellets accommodated for each cargo hold is different, the second cargo handling is used to carry out the cargo handling for each cargo hold in sequence and the different cargo accommodated for each cargo hold. Without mixing different types of polymer pellets, they can be stored separately in the land-side freight silo.

  In addition, while using one lot loading line, by appropriately controlling the holding cargo opening / closing valve, etc., it is possible to carry out cargo handling while selecting a plurality of cargo holds sequentially or simultaneously. Compared to the case where each cargo hold is provided with an unloading pipe and each land-side unloading line is connected for cargo handling, the number of unloading line connections between the land-side and the ship's upper side is significantly greater. Can be reduced.

  Thereby, reduction of the man-hour of cargo handling work can be aimed at. In addition, using the unloading line for lots, the unloading can be performed for each lot hold set having a capacity equivalent to the capacity of each lot for quality control on the land side by the first unloading, or the second lifting For cargo handling, the cargo is held for each cargo hold that has a capacity equivalent to the capacity of the silo unit whose quality is controlled on the land side, so it can be carefully managed for transportation, cargo handling, storage on land, etc. Traceability in quality control can be remarkably improved.

  This makes it possible to transport a large variety of polymer pellets efficiently in large quantities by transporting in bulk, not by packing in bulk, and at the same time efficiently transporting large quantities of polymer pellets without mixing many types of polymer pellets. .

  Also, by closing the on-off valve provided between the fixed discharge valve formed by a rotary valve, etc. and the confluence of the hold lifting line and the lot lifting line, While transporting polymer pellets from one cargo hold using a line, this polymer pellet is sent to a metered discharge valve below another cargo hold that contains other types of polymer pellets. Intrusion can be prevented. This makes it possible to prevent different types of polymer pellets that have entered the metering discharge valve from being mixed and unloaded at the same time when the other cargo hold polymer pellets are unloaded. Can be prevented.

  In the polymer pellet carrier described above, air for transportation from the facility on the land side is supplied to the unloading line for lots, and the polymer pellets stored in the cargo hold are unloaded by the air for transportation. .

  According to this configuration, it is possible to unload the polymer pellets of each cargo hold by pneumatic transportation using the air for transportation supplied from the land side, so on the upper side of the polymer pellet carrier ship, There is no need to provide a number of compressed air generators for lifting and handling corresponding to the number of handling lines. Therefore, onboard equipment can be reduced.

  In addition, in the entire system including the ship upper side and the land side, the compressed air generating equipment that requires a large capacity as a whole is installed on the land side, so that it is easy to perform installation work and maintenance inspection. Moreover, since the operating rate of the compressed air generator on the land side increases, the compressed air generator can be used efficiently. Moreover, by installing a compressed air generator on the land side, it can also be used for transfer between land-side freight silos and polymer pellets transported from the manufacturing plant to land-side freight silos. .

  The above polymer pellet carrier is configured to control the lifting and handling equipment in the polymer pellet ship by a control device on the land side.

  According to this configuration, since the control device for the lifting line on the ship is provided on the land side, the number of the control devices for the lifting line can be reduced as the entire system.

  On the other hand, in a ship having a piping line such as a tanker, this polymer is used to control the unloading line on the ship side by using the ship side control device to unload cargo from the ship upper side to the land side. Pellet carriers use the land-side control device to control the unloading line on the ship side on the land side, so there is a correspondence between the cargo silo on the land side and the cargo hold or lot hold set on the ship side. It can be centrally managed on the land side, which can significantly improve the quality control of polymer pellets, ensuring traceability, and avoiding mistakes in cargo handling operations.

  The polymer pellet carrier described above includes a compressed air generator that can generate an amount of air larger than the amount of air that can be unloaded from the polymer pellets stored in one cargo hold.

  According to this configuration, even if the cargo is unloaded at a port that does not have compressed air generation equipment on the land side, or if there is a problem with the compressed air generation equipment or air line on the land side, the compression on the ship It is possible to unload using an air generator. In addition, it is equipped with an emergency compressed air generator with a relatively small capacity and does not have a compressed air generator with sufficient capacity to operate all the lifting lines at the same time. Compared with the case where the compressed air generator is provided, the equipment on the ship can be remarkably reduced.

  The polymer pellet carrying barge forms the polymer pellet carrying ship as a barge ship having no propulsion device. The barge for transporting polymer pellets having this configuration can achieve the same effects as the above-described polymer pellet transport ship.

  In addition, the cargo handling method of the polymer pellet carrier ship or the polymer pellet carrier barge is a polymer that carries a plurality of types of polymer pellets without mixing by forming a lot hold set by combining a plurality of cargo holds containing polymer pellets. A handling method for a pellet carrier or a barge for polymer pellets, which uses a lot loading line connected to a land-side lifting line, and simultaneously loads the same kind of polymer pellets for each lot hold set. It is a method characterized by selectively performing the first lifting and unloading and the second lifting and unloading of different types of polymer pellets for each cargo hold.

  According to this method, when unloading and unloading, the opening and closing valve for holding is appropriately controlled to be opened and closed, so that when the type of polymer pellets contained in the cargo hold is the same in the lot hold set, One lifting / unloading can be used, and when the type of polymer pellets stored for each cargo hold is different, the second lifting / unloading can be used.

  In the first lifting / unloading, the same kind of polymer pellets stored in the cargo hold of the same lot hold set can be simultaneously lifted and loaded, so that they can be efficiently stored in the land-side cargo silo.

  In the second lifting / unloading, each cargo hold is unloaded in order, and the different types of polymer pellets contained in each cargo hold are not mixed, and the cargo is unloaded into each cargo silo on the land side. can do. Thereby, a small amount of various types of polymer pellets can be lifted and handled for each cargo hold accommodated in different types.

  In the cargo handling method for the polymer pellet carrier or the polymer pellet carrier barge, air for transportation from the facility on the land side is supplied to the unloading line for the lot, and the cargo air is used for the cargo hold. When the stored polymer pellets are lifted and handled, it is not necessary to provide a number of compressed air generators for the lifting and handling corresponding to the number of cargo handling lines on the upper side of the polymer pellet carrier ship, so the onboard equipment can be reduced. . In addition, in the entire system including the ship upper side and the land side, the compressed air generator having a large capacity is installed on the land side, so that it is easy to perform installation work and maintenance inspection. And the utilization factor of this compressed air generator on the land side can be increased and used efficiently.

  Moreover, by installing a compressed air generator on the land side, it can also be used for transfer between land-side freight silos and polymer pellets transported from the manufacturing plant to land-side freight silos. .

  In the above-described method of handling a polymer pellet carrier or a polymer pellet carrier barge, when the cargo handling equipment inside the polymer pellet carrier ship or the polymer pellet carrier barge is controlled by a control device on the land side, the cargo handling and the cargo handling are performed. Since the correspondence between the freight silo on the land side and the cargo hold or lot hold set on the ship side can be collectively managed on the land side, quality control of polymer pellets, ensuring traceability, and avoiding mistakes in handling operations In terms of surface, it can be remarkably improved. Moreover, since the control device for the lifting line on the ship is provided on the land side, the number of the control devices for the lifting line can be reduced as the entire system.

  According to the equipment on the shore side for the polymer pellet carrier and the transport barge of the present invention, in the prior art, the powder particles such as polymer pellets were packed and transported to avoid damage and contamination. However, it can be transported in bulk without damaging the powder, and it can be efficiently transported in large quantities simultaneously without mixing many kinds of polymer pellets.

  This eliminates the bagging work of granular materials, the bag container storage work, the taking out of the granular materials from the bag, etc., which are performed in the prior art, improving the work efficiency during transportation and mass transportation. It can be done efficiently.

It is a sectional side view of the hull which showed arrangement | positioning of the hold for cargo in the polymer pellet carrier ship used as the reference of this invention. FIG. 2 is a horizontal plan view of a hull showing an arrangement of cargo holds in the polymer pellet carrier ship of FIG. 1. FIG. 2 is a cross-sectional view of a hull showing the arrangement of cargo holds in the polymer pellet carrier of FIG. 1. It is the figure which showed the cargo handling line in the cargo hold | maintenance of the polymer pellet carrier ship used as the reference of this invention. It is the figure which showed typically the equipment on the land side for the polymer pellet carrier ship of the embodiment which concerns on this invention, and a barge for transportation, the loading line in a polymer carrier ship, etc. It is the figure which showed typically the equipment of the land side for the polymer pellet carrier ship of the embodiment which concerns on this invention, and a barge for transportation, the unloading line in a polymer pellet carrier ship, etc. It is the figure which showed typically the air line etc. in a polymer pellet carrier ship.

  Hereinafter, with reference to the drawings, a description will be given of equipment on the land side for a polymer pellet carrier and a carrier barge according to the present invention. In addition, although the polymer pellet carrier ship which has a propulsion apparatus is demonstrated here, this invention is applicable similarly regarding the barge for polymer pellet conveyance which does not have a propulsion apparatus. In addition, drawing is a figure for description, It did not necessarily draw with the dimensional ratio of the hull form and cargo hold | maintenance used with an actual ship.

  As shown in FIGS. 1 to 3, the polymer pellet carrier 1 used in the facility on the land side for the polymer pellet carrier and the carrier barge according to the embodiment of the present invention includes a cargo hold 10 ( (Hatched portion with diagonal lines). The cargo hold 10 is formed by a cylindrical body having a cross-sectional shape such as a circle, an ellipse, or a polygon, preferably a circular shape, and a hopper portion 10a having a hopper shape is provided at a lower portion thereof. The The cargo hold 10 is preferably made of aluminum alloy or stainless steel.

  By forming the cargo hold 10 with a cylindrical body made of aluminum alloy or stainless steel, a reinforcing material for reinforcing the wall surface of the cargo hold 10 can be made substantially unnecessary. The clearance (clearance) can be reduced. As a result, a large number of cargo holds 10 can be arranged in the cargo compartment of the hull of the polymer pellet carrier 1. In addition, by adopting aluminum alloy or stainless steel as the material, it is possible to reduce the weight and prevent foreign matter from being mixed due to rust generation.

  Further, almost or all of the cargo hold 10 disposed in the polymer pellet carrier 1 is formed in the same shape with the same size, and the hull shape of the polymer pellet carrier 1 is changed without changing the shape and capacity of the cargo hold 10. Since the cargo hold 10 can be mass-produced by one type, the construction can be facilitated and the manufacturing cost can be reduced.

  Further, a support structure for the cargo hold 10 is provided at the lower part and is fixedly arranged on the hull, thereby eliminating the frame structure for fixing the cargo hold 10 to the hull. Thereby, a useless space (space) inside the hull can be reduced, and the space inside the hull can be used effectively. If necessary, a support structure may also be provided on the cargo hold 10 and fixed to the hull.

  Then, as shown in FIG. 2, a lot hold set 11 is formed by combining a plurality of the cargo holds 10 (three in FIG. 1 to 3). In this way, when the lot hold set 11 is formed by the plurality of cargo holds 10, the capacity of the lot hold set 11 is made to correspond to the quantity of lots which is the management unit in the land handling system, and this management unit is set. Since it can be loaded while maintaining, traceability (trackability) in lot units can be maintained.

  Furthermore, a single unit or a plurality (two sets in FIGS. 1 to 3) of lot hold sets 11 are combined and integrated to form a cargo unit 12, and the integrated cargo unit 12 is arranged inside the hull. In the maximum ship width portion, a plurality of cargo units 12 (2 units in FIGS. 1 to 3) are arranged side by side in the ship width direction.

  When the cargo unit 12 is formed by one or a plurality of lot hold sets 11 in this way, the cargo unit 12 composed of a plurality (six in FIG. Can be mounted inside the hull for each cargo unit 12, and the number of man-hours and the number of construction days can be reduced as compared with the case where each cargo hold 10 is mounted inside the hull one by one. .

  In the configuration of FIG. 2, the polymer pellet carrier 1 has one vertical cargo unit 12, one horizontal cargo unit 12, and two vertical cargo units 12 side by side from the bow side. A total of five of these are mounted side by side, a total of 12 cargo units 12 and 24 lot hold sets 11 and finally 72 cargo holds 10 are mounted.

  In addition, the cargo hold 10 formed of a cylindrical body provided with a hopper portion 10a at the lower part is combined with the lot hold set 11 and the cargo unit 12 and efficiently arranged inside the hull, thereby making it possible to compare with the ship width. Since a large number of cargo holds 10 having a relatively small diameter are arranged, the height of the hopper portion 10a is made lower than in the case of providing a cargo hold having a relatively large capacity as in the case of a bulk carrier of the prior art. can do. Therefore, the space outside the hopper portion 10a can be reduced, and the space inside the hull can be effectively utilized.

  Furthermore, since the polymer pellets can be loaded to a low position, the center of gravity of the loaded cargo and the center of gravity of the hull during voyage at the time of loading can be lowered. In addition, since the width of the cargo hold 10 is significantly smaller than that of the bulk carrier of the prior art, the lateral movement of the polymer pellets during the voyage is reduced, and the stability of the hull to roll is increased.

  Further, in this polymer pellet carrier 1, as shown in FIG. 3, a double bottom 2 is provided on the ship bottom side, a ballast tank 3 and the like are provided on the ship side, a cover 5 is provided on the upper side, and cargo of the hull is provided. It is preferable to form the compartment as a double hull structure and as a closed structure (enclosed structure).

  With this configuration, even if the hull is damaged due to grounding, collision, etc., the polymer pellet can be prevented from flowing into the ocean, and the closed structure allows the cargo hold 10 by direct sunlight and its An increase in the temperature of the polymer pellet inside can be prevented.

  In addition, when the ballast tank 3 is provided on the side of the hull, if there is an empty cargo hold 10 that causes an imbalance in the attitude (heel, trim) of the ship, or polymer pellets with different specific gravity are used on the left and right sides By adjusting the amount of ballast water in the ballast tank 3 on the side of the ship for cases such as when loading a fixed capacity or when the amount of polymer pellets in the cargo hold 10 changes during cargo handling, Unbalance of posture (heel, trim) can be resolved.

  Furthermore, if the cover 5 is provided so as to include the entire cargo hold 10 and the cargo handling line, the work space, and the passage to the upper portion of the cargo hold 10, damage to the cargo hold 10 due to seawater driving or the like is prevented. Moreover, the corrosion by seawater, such as the inner surface of the cargo hold 10, an outer surface, and the outer surface of the piping of the line for cargo handling, can be reduced. Furthermore, the workability of the work at the upper part of the cargo hold 10 during stormy weather can be improved, and maintenance becomes easier. Further, the cover 5 facilitates temperature management and humidity management inside the cargo hold 10 during marine transportation.

  In addition, since the cover 5 is provided with a support portion such as a pipe necessary above the cargo hold 10 on the cover 5 side, these pipes can be preliminarily equipped, so that the construction period can be shortened. There is also a merit at the time of construction.

  Next, the equipment on the land side and the cargo handling line for the polymer pellet carrier and the carrier barge according to the embodiment of the present invention will be described. There are a loading line and an unloading line as cargo handling lines between the equipment on the land side for the polymer pellet carrier and the transport barge and the polymer pellet carrier 1. As shown in FIGS. 4 and 5, in the cargo hold 10, a hold loading line 21 is connected to an upper portion thereof. The hold load line 21 is configured to be integrated with the lot load line 22 via a hold selection valve (flow path switching valve) 21a.

  As shown in FIG. 5, the lot loading line 22 is led to the loading connecting portion 22 b through the on-off valve 22 a so as to be individually connected to the land-side loading line 100. The loading connection portion 22b is provided only on the starboard (starboard side) side. The land-side loading line 100 is connected to the loading connection portion 22b. In this embodiment, three cargo holds 10, that is, one lot hold set 11 is connected to the land-side loading line 100. As a result, loading can be performed in units of lots having a capacity corresponding to the capacity of the hold set 11 for lots, and contamination between lots can be avoided.

  If the contamination between lots does not become a problem, the lot loading line 22 may be integrated into a unit loading line (not shown), or several unit loading lines may be further integrated. May be.

  In addition, a hold air line 31 is provided at the upper portion of the cargo hold 10 for extracting the air A for conveyance. The hold air line 31 includes an on-off valve 31 a and is integrated into the lot air line 32 for each lot hold set 11.

  On the front end side of the lot air line 32, an on-off valve 32b and a connecting portion 32c beyond the open / close valve 32b are provided. A land-side air discharge line 110 connected to the land-side exhaust air purification device 30 is connected to the connection portion 32c. The air exhaust line 110 is provided with an exhaust air purification device 30.

  By integrating these pipes, the piping of the cargo line on the upper side of the ship and the air discharge line can be shortened as a whole. Further, the air A used for conveyance discharged from the cargo hold 10 and mixed with dust and the like can be purified by the exhaust air purification device 30 and discharged into the atmosphere.

  That is, a hold loading line 21 is connected to the upper portion of each cargo hold 10 via a hold selection valve 21 a, and the hold load line 21 is connected to the lot load line 22 for each lot hold set 11. By integrating the lot loading line 22 to one side (usually starboard side), it is connected to the connecting part 22b for loading, which is provided on this side and is connected to the land-side loading line 100. Provide.

  Further, as shown in FIGS. 4 and 6, the lifted load line includes a hold lifted on-off valve 41a, a rotary valve 41b serving as a fixed discharge valve, and an on-off valve 41c below the hopper portion 10a of the cargo hold 10. The hold lifting line 41 is provided, and the holding lifting line 41 is connected to the lot lifting line 42.

  As shown in FIG. 6, the unloading line 42 for lots is further branched by the flow path switching valve 42a into the unloading line 42S for starboard and the unloading line 42P for port, and led to the manifold deck 4. After passing through the on-off valves 42Sa and 42Pa, they are guided to the lifted line connection portions 42Sb and 42Pb provided on the heel side. The land-side lift line 120 is connected to one of the lift line connection portions 42Sb and 42Pb.

  In other words, a holding cargo line 41 having a holding cargo opening / closing valve 41a is connected to the lower portion of each cargo hold 10, and a holding cargo line 41 is provided for each lot hold set 11. It is integrated with the unloading line 42, and the unloading line 42 for the lot is branched by the flow path switching valve 42a and led to the manifold deck 4 on both sides. It is configured by being connected to a lifted line connecting portion 42Sb, 42Pb which is a connecting portion with the line 120.

  In this polymer pellet carrier 1, a rotary valve 41b is provided below the hold lift on-off valve 41a in the hold lift line 41 below the cargo hold 10, and an open / close valve below the rotary valve 41b. 41c is provided, and by opening and closing the on-off valve 41c provided between the rotary valve 41b and the merging portion of the hold lifting line 41 and the lot lifting line 42, the lot lifting While the polymer pellet P is being transported from one cargo hold 10 using the load line 42, this polymer pellet P is used in another cargo hold 10 containing other types of polymer pellets P. Intrusion into the lower rotary valve 41b can be prevented. As a result, different types of polymer pellets P entering the rotary valve 41b can be prevented from being mixed and unloaded at the same time when the polymer pellets P of the other cargo hold 10 are unloaded. Contamination can be prevented.

  With these configurations, as shown in FIG. 6, the compressed air A for unloading is supplied from the land-side air supply line 130 from the land-side compressed air generation facility (compressor) to the connecting portion 51 b, the on-off valve 51 a, The air is supplied to the lifted air supply line 51, the on-off valve 42b, and the lifted cargo line 42.

  During this unloading, the polymer pellets P accommodated in the cargo hold 10 are moved from the cargo hold 10 to the holding lift opening / closing valve 41a, rotary valve 41b, and opening / closing valve 41c of the holding lifting line 41. Then, it falls to the lot lifting line 42 and is unloaded to the land-side lifting line 120 via the lot lifting lines 42, 42S (or 42P) together with the transport air A. .

  According to this configuration, the polymer pellets P of each cargo hold 10 are removed from the air by using the compressed air A supplied from the land by appropriately controlling the holding cargo opening / closing valve 41a, the opening / closing valve 41c and the like. In transportation, a first freight handling for simultaneously lifting the same kind of polymer pellets P for each lot hold set 11 and a second freight handling for sequentially loading different types of polymer pellets P for each freight hold 10. It can be done selectively.

  Moreover, on the ship of the polymer pellet carrier 1, by providing a dedicated facility for generating compressed air for cargo handling without providing a regular cargo handling compressor (for example, the number corresponding to the number of cargo handling lines), The operating rate of the onshore compressor can be improved. On the other hand, since a large-scale compressed air compressor is not required on the ship, the ship equipment can be reduced.

  Furthermore, as shown in FIG.4 and FIG.7, the drying line 33 provided with the drying apparatus 34 is provided. In the drying line 33, the drying air A is sent into the cargo hold 10 through the drying device 34 and the on-off valves 33 a and 33 b and the hold drying line 33 c of each cargo hold 10.

  With this drying air A, the inside of the cargo hold 10 can be dried. The air A after drying the cargo hold 10 returns to the drying line 33 via the hold air line 31 and the lot air line 32 until the cargo hold 10 to be dried is dried. Circulate. By using the drying line 33 to dry the inside of the cargo hold 10 both before loading and during storage of the polymer pellets P, the polymer pellets P can be transported in a dry state. Can be transported while maintaining high quality.

  In addition, it is preferable to equip the ship with a compressed air generator 35 having a capacity capable of unloading at least one polymer pellet P of the cargo hold 10 by pneumatic transportation. The compressed air generator 35 is provided in connection with the lifted air supply line 51 in the configurations of FIGS.

  With this configuration, even if there is a problem with the compressed air generator of the onshore facility, the generated air A is used for the lot via the unloading air supply line 51 using the compressed air generator 35 on the ship. It is possible to supply to the freight line 42 and carry out the freight handling. In this case, although the emergency compressed air generator 35 is mounted, the compressed air generator having sufficient capacity to operate all the cargo handling lines at the same time is not equipped.

  Next, a cleaning facility for the cargo hold 10 will be described. The polymer pellet carrier 1 includes a cleaning facility for cleaning the cargo hold 10 with the cleaning water W. As shown in FIG. 4, the cargo hold 10 has a cleaning line 52 provided with a cleaning nozzle 52a at the tip in order to spray cleaning water W such as fresh water onto the cargo hold 10 to clean the inside. Is provided. If the cleaning water W that has washed the cargo hold 10 is purified by a purification device (not shown) provided on the ship and reused, the reuse of the cleaning water W can prevent environmental pollution, and the cleaning water The amount of W can be reduced.

  By providing the polymer pellet carrier 1 with a washing line 52 and a drying line 33, the cargo hold 10 is washed with washing water W such as fresh water during ballast voyage, and then dried or dehumidified. Can be dried. Therefore, different types of cargo can be loaded immediately upon arrival at the loading port.

  According to this structure, the hold load line 21 is integrated with the lot load line 22 and led to the load connection portion 22b, and the hold load line 41 is integrated with the lot load line 42. It branches into a unit lifting line 42P for port and a unit lifting line 42S for starboard, and is led to each of the lifting line connection portions 42Pb and 42Sb.

  Therefore, not only can the length of the piping of the cargo handling line on the ship be shortened, but the lot hold set in which the capacity of the lot hold set 11 is made to correspond to the quantity of lots as a management unit in the land cargo handling system. Every 11 can be loaded and unloaded using a dedicated line for each lot hold set 11. In addition, by separately providing the loading line and the lifting line, contamination such as contamination of the polymer pellets P to be transported and mixing with other types can be prevented.

  Therefore, it is possible to carry out cargo handling while maintaining the management unit of the lot while preventing contamination between the lots, and it is possible to maintain the traceability (trackability) in the lot unit.

  In addition, by arranging the lot loading line 22 in two upper and lower stages and guiding a plurality of lines to the left and right, a limited space on the ship can be effectively used and the height of the cover 5 can be kept low. . In addition, when the vertical pipe on the side of the cargo hold 10 is arranged with a support member provided on the cargo hold 10, it can be installed in a factory on the land side during construction.

  The polymer pellet carrier 1 is configured to control the lifting and handling equipment in the polymer pellet ship 1 by a control device on the land side. According to this configuration, since the lifting line control device is not provided on the upper side of the ship and is provided only on the land side, the number of lifting line control devices can be reduced as the entire system.

  In addition, since the polymer pellet carrier 1 controls the unloading line on the ship side on the land side using the control device on the land side, the cargo silo on the land side and the cargo hold 10 or the lot hold on the ship side are controlled. The correspondence relationship with the set 11 can be collectively managed on the land side, the quality control of the polymer pellets P can be remarkably improved, and high traceability (trackability) can be secured.

  Next, cargo handling in the polymer pellet carrier 1 configured as described above will be described. At the time of loading / unloading, as shown in FIG. 5, the land-side loading line 100 is connected to the loading connecting portion 22b of the polymer pellet carrier 1, and the land-side air discharge line 110 is connected to the connecting portion 32c. Is done. Then, the on-off valve 22a and the on-off valve 32b are opened.

  The polymer pellet P is fed into the lot loading line 22 together with the air A for transportation from the land-side cargo silo by the land-side loading line 100, and from the hold loading line 21 to the inside of the cargo hold 10. Supplied. The polymer pellet P is stored inside.

  On the other hand, the air A for conveyance is exhausted by the hold air line 31 provided with the on-off valve 31 a and is sent to the air discharge line 110 on the land side via the lot air line 32. The polymer pellets P are released into the atmosphere with fragments and the like removed.

  At this time, since the lot loading line 22 and the lot air line 32 are used for loading, the loading can be performed for each lot and mixing between lots can be prevented. Therefore, it is possible to efficiently store the various types of polymer pellets P in each cargo hold 10 without mixing them for each lot management unit.

  When unloading, as shown in FIG. 6, the land-side unloading line 120 is connected to the unloading line connection portion 42Sb (or 42Pb) provided on one of the left and right anchors. When the compressed air supply line 130 on the side is connected to the compressed air line connection part 51b on the ship side and the air A for pressure feeding is sent, the air A for pressure feeding passes through the air supply line 51 for lifted cargo, It reaches the unloading line 42 for the lot.

  On the other hand, the polymer pellet P is supplied from the lower part of the hopper portion 10a of the cargo hold 10 to the hold lifting / closing valve 41a, the rotary valve 41b and the opening / closing valve 41c. 42, it is transported from the unloading line connecting portion 42Sb (or 42Pb) to the unloading line 120 on the land side via the flow path switching valves 42a and 42S (or 42P).

  At this time, by appropriately controlling the air flow rate, the first lifting / unloading for each lot hold set 11 or the second lifting / unloading for each cargo hold 10 can be performed to perform the lifting / unloading. As a result, in the first lifting / unloading, the same type of polymer pellets P can be efficiently and simultaneously accommodated in each cargo silo on the land side, and in the second lifting / unloading, various types of polymer pellets P are mixed. And can be sequentially accommodated in each land-side cargo silo.

  Accordingly, by using one lot loading line 22 or one lot lifting line 42, the hold selection valve 21a, the holding lifting opening / closing valve 41a, the opening / closing valve 41c, etc. are appropriately controlled. In addition, since a plurality of cargo holds 10 can be loaded or unloaded while being selected simultaneously or over time, the number of loading lines and landing lines between the land and the ship can be reduced. . Thereby, reduction of the man-hour of cargo handling work can be aimed at.

  In other words, when all the cargo holds 10 in the lot cargo set 11 are selected by the hold selection valve 21a and loaded at the same time, the cargo can be efficiently loaded with a small number of loading lines. In addition, when one cargo hold 10 is selected by the hold selection valve 21a and this cargo hold 10 to be selected is sequentially changed and loaded, different types and grades of polymer pellets can be used with a small number of loading lines. P can be loaded into separate cargo holds 10.

  Normally, an onshore base-side silo is sized so that one silo corresponds to one lot of polymer pellets P, but several ship-side cargo holds 10 are provided so as to correspond to one lot of this base-side silo. In addition, by forming the lot hold set 11 together, it is possible to standardize the capacity of the cargo hold 10 when the polymer pellets P are bulk transported. Further, by forming the volume of each cargo hold 10 in accordance with the production capacity of one lot of polymer pellets P on the base side, a large ship of the polymer pellet carrier 1 can be designed with the same concept.

  Also, even if the capacity of one lot on the base side becomes larger than the current state in the future, increasing the number of cargo holds 10 used for that one lot will increase the capacity of one future lot. Yes. That is, the polymer pellet carrier 1 has a very high cargo handling flexibility.

  As a result, a wide variety of polymer pellets P can be efficiently transported in large quantities by transporting in bulk instead of being packed in bags, and many types of polymer pellets P can be transported in large quantities efficiently at the same time.

  In addition, assuming that the loading port 22b is arranged only on one side (usually on the starboard side) assuming a loading port, the piping length can be reduced, and the lifting connection portions 42Sb and 42Pb are both connected. By installing it on the dredger, it will be configured to have redundancy, so that it will be able to cope with the increase in the number of unloading ports in the future.

  The equipment on the land side for the polymer pellet carrier ship and the barge for transportation of the present invention can also transport powder particles such as polymer pellets in bulk without damaging the powder particles, and many This makes it possible to efficiently transport large quantities of polymer pellets at the same time, thereby eliminating the powder bagging operation, bag container storage operation, and powder particle extraction operation that are performed in the prior art. Thus, the work efficiency during transportation can be improved, and the effect of being able to efficiently carry out mass transportation can be obtained, so that it can be used for transportation of polymer pellets.

DESCRIPTION OF SYMBOLS 1 Polymer pellet carrier 10 Cargo hold 10a Hopper part 11 Lot hold set 12 Cargo unit 21 Hold load line 21a Hold selection valve 22 Lot load line 22a On-off valve 22b Load connection part 30 Land-side exhaust air purifier 31 Hold Air Line 32 Lot Air Line 32b Open / Close Valve 32c Connection 33 Drying Line 34 Drying Device 35 Compressed Air Generator 41 Hold Lift Line 41a Hold Lift Open / Close Valve 41b Rotary Valve 42 Lot Lift Line 42a Flow path switching valve 42b Open / close valve 42S Starboard lift line 42P Left star lift line 42Pa, 42Sa Open / close valve 42Pb, 42Sb Lift load line connection 51 Lift air supply line 51a Open / close valve 51b Connection 52 In 52a cleaning nozzle 100 shore loading line 110 supplying air unloading line 130 shore land side air discharging line 120 shore line A air P polymer pellets W washing water

Claims (6)

A land side freight silo containing polymer pellets housed in a cargo hold of a polymer pellet carrier or a transport barge;
A land-side unloading line that receives polymer pellets from the unloading line of the polymer pellet carrier or the transport barge during unloading; and
A land-side air supply line that supplies compressed air for lift to the lift air supply line of the polymer pellet carrier or the transport barge during unloading;
An on-shore facility for a polymer pellet carrier and a transport barge comprising a land-side compressed air generator for supplying the air for unloading to the on-shore air supply line.   The land side for the polymer pellet carrier and the transport barge according to claim 1, wherein a device for controlling the lifting and handling equipment in the polymer pellet carrier or the transport barge is provided on the land side. Equipment. A land-side air discharge line that receives the air returning from the polymer pellet carrier or the carrier barge;
2. An exhaust air purifier for removing fragments of polymer pellets in the air returning from the polymer pellet carrier ship or barge provided in the air discharge line on the land side. Or the facilities on the land side for the polymer pellet carrier ship and the barge for transportation as described in 2.   Either or both of transferring the compressed air generator installed on the land side between the silos for cargo on the land side, or transferring the polymer pellets transported from the manufacturing plant to the cargo silo on the land side The equipment on the land side for the polymer pellet carrier ship and the carrier barge according to any one of claims 1 to 3, wherein the equipment is configured to be used in the above.   The polymer pellet carrier according to any one of claims 1 to 4, characterized in that an on-shore loading line for loading polymer pellets is provided in the cargo hold of the polymer pellet carrier or a transport barge. Equipment on the shore for transport barges.   The above-mentioned land-side freight silo is provided separately, without mixing different types of polymer pellets accommodated for each cargo hold of the polymer pellet carrier or the transport barge. 6. The facility on the land side for the polymer pellet carrier ship and the barge for transportation according to any one of 5 above.

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