JP2017178339A - Urea powder storage container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an urea powder storage container that is improved in handling property of urea powder in manufacturing urea water.SOLUTION: The urea powder storage container 2 used in a marine vessel with an urea water manufacturing device includes loading means 23 that is a hermetic type container for storing urea powder therein and loads the urea powder stored therein to the urea water producing device.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a powdered urea storage container.

  An SCR (Selective Catalytic Reduction) system is known as one of countermeasures against regulations (NOx tertiary regulations) aimed at reducing emissions of nitrogen oxides (NOx) from ships. In the SCR system, urea water is generally used as a reducing agent. In the SCR system in a ship, a method of storing in a state of powdered urea in a ship and producing and using urea water from powdered urea at the time of use has been studied. Since powder urea is known to be solidified by moisture absorption, various methods for storing powder urea while avoiding moisture absorption on ships have been studied (for example, Patent Document 1).

JP 2010-71148 A

  However, ships are generally humid, and it is difficult to completely prevent moisture absorption of powdered urea. When powdered urea is solidified in a storage container, it is necessary to crush the solidified powdered urea in order to put it in a urea water production device or the like, which increases the amount of work involved in the production of urea water. Can be considered. Thus, there was room for improvement in the handleability of powdered urea stored in a ship when manufacturing urea water.

  The present invention has been made in view of the above, and an object of the present invention is to provide a powder urea storage container in which the handleability of powder urea in producing urea water is improved.

  In order to achieve the above object, a powder urea storage container according to the present invention is a powder urea storage container used in a ship equipped with a urea water production apparatus, and is a sealed container that stores powder urea inside. The urea water production apparatus has a charging means for charging powdered urea inside.

  According to the above powdered urea storage container, when powdered urea is stored, since it is a sealed type, solidification of powdered urea due to moisture absorption can be prevented, so that a decrease in handleability is prevented. In addition, when powdered urea is charged into the urea water production apparatus, the powdered urea is easily charged by the charging means. Therefore, the handleability of powdered urea when producing urea water is improved.

  Here, the charging unit may be a watering unit that sprays water into the container.

  As mentioned above, by providing watering means, when powdered urea solidifies inside the container, water is sprayed to promote dissolution of powdered urea, and it is easy to put powdered urea into the urea water production device Can be.

  The water sprinkling means may be a mode in which water is sprayed at a predetermined distance from the inner surface of the container.

  As described above, the powdered urea solidified in the vicinity of the inner surface of the container is dissolved while being divided into blocks of a desired size by spraying water on the inner surface of the container at a predetermined distance and spaced apart. Therefore, the workability related to the introduction of powdered urea into the urea water production apparatus can be further improved.

  The charging means may include a means for opening and closing the container below the container.

  As described above, by providing the means for opening and closing the container below the container, the powdered urea can be dropped into the urea water production apparatus directly from the bottom of the container. Urea handling is improved.

  ADVANTAGE OF THE INVENTION According to this invention, the powder urea storage container with which the handleability of powder urea at the time of manufacturing urea water was improved is provided.

It is a figure explaining the use environment of the powder urea storage container which concerns on one Embodiment of this invention. It is a schematic block diagram of the powder urea storage container which concerns on embodiment. It is a figure explaining the procedure at the time of throwing powder urea into a urea water manufacturing apparatus. It is a schematic block diagram of the powder urea storage container which concerns on a 1st modification. It is a schematic block diagram of the powder urea storage container which concerns on a 2nd modification.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the accompanying drawings. In the description of the drawings, the same elements are denoted by the same reference numerals, and redundant description is omitted.

  FIG. 1 is a diagram illustrating an environment in which a powdered urea storage container 2 according to an embodiment of the present invention is used. FIG. 2 is a schematic configuration diagram of a powder urea storage container. As shown in FIG. 1, a powder urea storage container 2 according to the present embodiment is a container that is mounted on a ship 1 and used. The ship 1 includes a urea water production apparatus 3. The powdered urea storage container 2 is a container for storing powdered urea used for the production of urea water in the urea water production apparatus 3. Urea water is used in an SCR (Selective Catalytic Reduction) system.

  The powdered urea is charged into the powdered urea storage container 2 inside or outside the ship 1. In the ship 1, the powdered urea is stored in a state of being charged into the powdered urea storage container 2, and powdered urea is charged from the powdered urea storage container 2 to the urea water production apparatus 3 to produce urea water.

  As shown in FIG. 2, the powder urea storage container 2 includes a cylindrical main body portion 21, an upper lid portion 22 attached above the main body portion 21, and a lower lid portion 23 attached below the main body portion 21. Have. The powder urea storage container 2 is a sealed container in which powder urea is charged and stored.

  Although the volume of the powder urea storage container 2 can be set as appropriate, it is preferable that the urea powder production apparatus 3 can accommodate the powder urea necessary for producing urea water at a time. In this case, by storing the total amount of powdered urea used at the time of one-time production of urea water in the powdered urea storage container 2, the entire amount of powdered urea in the container is produced at the time of urea water production. 3 can be input. Accordingly, measurement of powdered urea at the time of charging can be omitted, and workability in the production of urea water is improved.

  The main body 21 is a hollow cylinder and is integrated with the lower lid 23 attached to the lower side so that powdered urea can be accommodated therein. Although FIG. 2 shows an example in which the main body portion 21 is cylindrical, the main body portion 21 is not limited to a cylindrical shape, and may be, for example, a cylindrical shape having a cross section different from a circular shape such as a quadrangle. The tubular main body 21 is provided with a pipe 25 continuing from the connector 24. A water supply pipe or the like is connected to the connector 24, which will be described later.

  On the inner surface side of the main body portion 21, a plurality of jet outlets 26 connected from the pipe 25 are provided. In the example shown in FIG. 2, the pipe 25 and the plurality of jet outlets 26 are provided on the inner surface of the main body 21. The spout 26 may be formed by providing a through hole on the side surface of the pipe 25 or may be formed by attaching a branch pipe or the like to the pipe 25 continuous from the connector 24. The plurality of jet nozzles 26 are provided apart from each other at a predetermined interval along the inner surface of the main body 21. As shown in FIG. 2, it is preferable that the interval between the adjacent ejection ports 26 is uniform to some extent, but the interval between the ejection ports 26 is not limited. In the powdered urea storage container 2 of FIG. 2, an example is shown in which, among the plurality of jets 26 in the main body 21, jets 26 having the same distance from the end on the lower lid 23 side are connected by a pipe 25. However, the arrangement and shape of the pipes 25 that connect the plurality of jets 26 and the jets 26 and the connector 24 are not particularly limited.

  The pipe 25 may be provided along the outer surface of the cylindrical main body 21, or may be provided between the inner surface and the outer surface of the main body 21. For example, the main body 21 may have a double structure including an outer wall and an inner wall, and the pipe 25 may be provided in a hollow space between the outer wall and the inner wall. In this case, the connector 24 may be provided on the outer wall, and the branch pipe branched from the pipe 25 may penetrate the inner wall to form the ejection port 26. As described above, the attachment positions of the pipe 25 and the ejection port 26 can be changed as appropriate. Moreover, it can replace with providing the piping 25 and can utilize the hollow space itself as piping for supplying warm water. That is, it is good also as a structure which provides the spout 26 connected with a hollow space while supplying warm water via a connector 24 with respect to a hollow space.

  In addition, since the spout 26 opens to the inner surface side of the main body 21, there is a possibility that the powdered urea accommodated in the main body 21 may reversely enter the pipe 25 from the spout 26. Therefore, it is good also as a structure provided with the mechanism for supplying the compressed air for discharging | emitting the urea powder reversely infiltrated with respect to the piping 25. FIG.

  The upper lid portion 22 functions as a lid that covers the upper end portion of the main body portion 21. It is preferable that the upper lid portion 22 has a structure equipped so that the upper side end portion of the main body portion 21 can be sealed. The upper lid portion 22 may be attached to the main body portion 21 via a hinge or the like, or may be completely separated from the main body portion 21. The configuration and shape of the upper lid portion 22 can be changed as appropriate. The upper lid portion 22 is used when powdered urea is charged into the powdered urea storage container 2.

  The lower lid portion 23 functions as a lid that covers the lower end portion of the main body portion 21. When the lower lid portion 23 is attached to the main body portion 21, it is preferable to seal the lower side end portion of the main body portion 21. Note that the lower lid portion 23 may be attached to the main body portion 21 via a hinge or the like, or may be completely separated from the main body portion 21. In the case of the powder urea storage container 2 according to the present embodiment, the lower lid part 23 includes a frame body part 231 fixed to the main body part 21 and a plate lid part 232 that opens and closes. The configuration and shape of the lower lid portion 23 can be changed as appropriate. The lower lid portion 23 is used as a means for opening and closing the container below the main body portion 21 when powdered urea is introduced into the urea water production apparatus 3.

  Moreover, it is preferable that the powder urea storage container 2 can be self-supporting in the ship 1, and it is preferable that it can move in the ship 1. As a configuration in which the powder urea storage container 2 is movable, a plurality of tires 27 may be provided on the lower lid portion 23 of the powder urea storage container 2. In addition, it can be set as the structure which conveys the powder urea storage container 2 with a certain conveyance apparatus. In this case, for example, a suspended portion 28 is provided for the upper lid portion 22, and powder urea is stored using the suspended portion 28 by a transport device in a state where the upper lid portion 22 is attached to the main body portion 21. It is good also as a structure which hangs and conveys the container 2. FIG. In the case where the powder urea storage container 2 includes the hanging portion 28, the structure (durable) prevents the upper lid portion 22 and the main body portion 21 from being separated even when the powder urea storage container 2 is suspended by the hanging portion 28. It is desirable to have the property. The hanging portion 28 may be provided in the main body portion 21 instead of the upper lid portion 22. Moreover, even if it is a case where the suspension part 28 is provided, it is good also as a structure in which the lower cover part 23 is provided with the leg part etc. as a structure which can make the powder urea storage container 2 self-supporting. In addition, the structure for making the powder urea storage container 2 movable is not limited to the above, and can be used in combination with a known mechanism or the like.

  Since the main body part 21, the upper lid part 22 and the lower lid part 23 have a long contact time with powdered urea, it is preferable to use a stainless steel material which does not deteriorate due to contact with powdered urea. However, a structure for preventing deterioration (for example, painting) may be performed on the area in contact with the powdered urea, and the material of the main body 21, the upper lid 22, and the lower lid 23 is not particularly limited.

  Next, a method for handling powder urea using the powder urea storage container 2 will be described.

  When the powdered urea stored in the powdered urea storage container 2 is put into the container, the upper cover part 22 is opened with the lower cover part 23 attached to the main body part 21, and the powdered urea is started from the upper cover part 22 side. . The input amount at this time is preferably set to an amount corresponding to the powdered urea used for the production of urea water once in the urea water production apparatus 3. In addition, it is good also as a mechanism which does not need to open the whole upper cover part 22 at the time of injection | throwing-in by providing the upper cover part 22 with the air suction device for powder | flour urea injection | throwing-in.

  When the powder urea is stored in the powder urea storage container 2, the inside is sealed by the main body portion 21, the upper lid portion 22, and the lower lid portion 23. A well-known technique can be used for sealing, For example, the method of using packing is mentioned. When using packing, it is preferable to use what is comprised with the material which has tolerance with respect to urea water, such as Teflon (trademark), for example, but it is not specifically limited. By sealing the inside of the powder urea storage container 2, moisture absorption of the internal urea can be prevented as much as possible. Moreover, it is preferable that the powder urea storage container 2 is placed in an environment as low as possible during the period in which the powder urea is stored. The tire 27 or the suspension part 28 is used for the movement of the powder urea storage container 2.

  When powdered urea is charged into the urea water production apparatus 3, the powdered urea in the powdered urea storage container 2 is directly charged into the powdered urea inlet of the urea water production apparatus 3. At this time, by opening the plate lid portion 232 of the lower lid portion 23, the powder urea in the powder urea storage container 2 can be dropped and discharged from below. Further, part of the powder urea in the powder urea storage container 2 is solidified, and the powder urea may not be easily dropped and discharged from the main body 21. In such a case, the powdered urea can be dissolved and dropped by spraying warm water inside the main body 21 using the pipe 25. In addition, it is good also as a structure which supplies cold water instead of warm water. However, the dissolution efficiency of powdered urea increases with warm water.

  Specifically, as shown in FIG. 3, after moving the powder urea storage container 2 onto the powder urea inlet in the urea water production apparatus 3, a hot water supply pipe provided in the ship 1 with respect to the connector 24. 40 are connected. The hot water supply pipe 40 is provided with a valve 41 for controlling the supply of hot water, and the supply and stop of the hot water can be controlled by opening and closing the valve 41. In such a configuration, when the valve 41 is opened, warm water is supplied from the warm water supply pipe 40, and the warm water flows into the pipe 25 through the connector 24. In addition, it is good also as a structure which provides the control part for monitoring the supply amount of warm water, and performs automatic opening / closing control of the valve | bulb 41 based on the supply amount of warm water. Hot water in the pipe 25 is supplied into the main body 21 from the plurality of jets 26. With this warm water, the powdered urea solidified inside the main body 21 is dissolved and easily dropped.

  In the powder urea storage container 2, the ejection ports 26 are arranged in a state of being spaced apart from each other by a predetermined distance, and water is sprayed to a position separated from the inner surface of the main body 21 by a predetermined distance. When powdered urea dissolves, it gradually dissolves from the portion in contact with water (warm water), so that the jet outlets 26 are separated from each other, so that the hot water from the jet outlet 26 causes the vicinity of the inner surface of the main body 21. It is considered that the solidified powdered urea can be dissolved while being divided into block units of a desired size. Therefore, the solidified powder urea can be dropped before all the solidified powder urea in the vicinity of the inner surface is dissolved.

  Moreover, instead of arranging the plurality of jet nozzles 26 at the grid-like intersection positions as shown in FIG. 2 or FIG. 3, the jet nozzles 26 themselves form a grid pattern throughout the interior of the powdered urea storage container 2. It may be arranged more finely. In that case, it is possible to finely control the divided size of the powdered urea by supplying hot water. For example, when the divided size of the powdered urea due to the supply of hot water is set to a size corresponding to the inlet of powdered urea in the urea water production apparatus 3 or an arbitrary size suitable for the urea water production capacity, It is considered that the charging efficiency of powdered urea is improved and the working time can be shortened.

  Note that the amount of hot water supplied to the inside of the main body 21 via the pipe 25 and the jet outlet 26 is changed according to the amount of powdered urea inside and the degree of moisture absorption (the amount of powdered urea solidified inside the main body 21). Preferably it is possible. In the configuration shown in FIG. 3, the supply amount of hot water can be changed by controlling the opening and closing of the valve 41, but the same mechanism is provided on the powder urea storage container 2 side to control the supply amount and supply port of the hot water. It is good. In addition, by providing a configuration for discharging a part of the hot water supplied to the pipe 25 of the main body 21 to a drain pipe (not shown) separate from the jet outlet 26, and controlling the amount of drainage from the drain pipe, It can also be set as the structure which controls the quantity of the hot water supplied into the inside of the main-body part 21 from the jet nozzle 26. FIG. Thus, the structure which concerns on supply of warm water can be variously changed.

  In addition, the powder urea storage container 2 may have a configuration capable of heating water supplied to the powder urea storage container 2. In this case, instead of the hot water supply pipe 40, a pipe for supplying cold water may be connected to supply cold water from the connector 24, and the heated hot water may be supplied from the jet outlet 26 to the inside of the main body 21.

  Thus, according to the powder urea storage container 2 according to the present embodiment, the urea water production apparatus 3 in the ship 1 is provided with the charging means used for charging the powdered urea.

  Due to the introduction of SCR systems in ships in recent years, cases of handling powdered urea in ships 1 have increased. Since powdered urea has been known to be a problem of solidification due to moisture absorption and fixation to a storage container, various methods for preventing solidification during storage in the ship 1 have been studied. However, there is a possibility that the power cost and the equipment cost increase in order to completely prevent the solidification in the ship 1 that tends to be a hot and humid environment.

  On the other hand, the powdered urea storage container 2 according to the present embodiment improves the handleability of the solidified powdered urea during the production of urea water while preventing the powdered urea from solidifying as much as possible. Therefore, especially in the situation where it is difficult to completely prevent the solidification of the powdered urea such as the ship 1, the handling property of the powdered urea when producing the urea water is improved. In addition, by using a container specialized for the purpose of storing the powdered urea that is input to the urea water production apparatus 3, for example, the size and shape of the powdered urea storage container 2 can be changed to a storage location in the ship 1 or the like. Since it can be changed corresponding to the amount of powdered urea to be stored in the container, the handling property of the powdered urea in the ship 1 is improved from the viewpoint that a flexible design change is possible.

  In the case of the powder urea storage container 2, as a configuration for preventing the solidification of the powder urea as much as possible, the powder urea storage container 2 has a configuration capable of being sealed when the powder urea is stored. Further, the powder urea storage container 2 has a lower lid portion 23 as an opening / closing means at the lower part of the main body portion 21 as one of the input means for improving workability, and the powder urea is supplied to the urea water production apparatus 3. When charging, the plate lid portion 232 of the lower lid portion 23 can be opened, and powdered urea can be dropped from below the main body portion 21. By setting it as such a structure, the handleability of the powder urea at the time of manufacturing urea water in the ship 1 improves.

  In addition, the powder urea storage container 2 is provided with a pipe 25 and a spout 26 as watering means for spraying water inside the main body 21 as one of charging means for improving workability. In this way, by providing watering means for spraying water inside, even when powdered urea is solidified, spraying water promotes dissolution of powdered urea and dropping off from the main body part 21 to produce urea water. Since powder urea can be easily supplied with respect to the apparatus 3, handling property improves.

  In particular, when a plurality of jet outlets 26 are arranged at a predetermined interval, the powder urea solidified inside the main body 21 by the water sprayed from the jet outlets 26 has a block of a desired size. Since it can dissolve | melt while dividing | segmenting into a unit, the workability | operativity concerning fall of powder urea and injection | throwing-in of the urea water manufacturing apparatus 3 improves.

(Modification)
Next, a modified example of the powdered urea storage container according to the present invention will be described with reference to FIGS. 4 and 5. However, the powdered urea storage container according to the present invention is not limited to the above-described embodiment and modified example. Absent.

  FIG. 4 is a view showing the powder urea storage container 5 according to the first modification. Compared with the powder urea storage container 2 shown in the above embodiment, the powder urea storage container 5 is different in the shape of the piping for supplying hot water and the lower lid.

  First, in the powder urea storage container 5, a pipe 25 for supplying warm water to the inside of the main body portion 21 is provided not at a position along the main body portion 21 but at the center in the main body portion 21. A sprinkling pipe 29 is provided in the center of the main body 21 so as to be continuous with the pipe 25 and extend in the extending direction of the main body 21 (the vertical direction in FIG. 4) and has an opening around it. In the powder urea storage container 5, when powdered urea is introduced into the urea water production apparatus 3, the hot water passing through the hot water supply pipe 40, the connector 24, and the pipe 25 flows from the water spray pipe 29 to the inside of the main body 21. Sprayed. Thereby, it can throw in with respect to the urea water manufacturing apparatus 3, dissolving the powder urea solidified within the main-body part 21. FIG.

  In addition, by controlling the position of the opening provided in the sprinkling pipe 29, the powdered urea solidified in the main body 21 can be dissolved while being divided into block units of a desired size. Moreover, the sprinkling pipe 29 is not limited to the structure of FIG. 4, and various changes, such as a shape and a number, can be added. For example, it is good also as a structure which provides the water spray pipe 29 so that a grid | lattice form may be formed over the whole inside of a container. In this case, since it is possible to uniformly spray water from the water spray pipe 29 with respect to the powder urea in the container, dissolution of the powder urea is further promoted.

  Moreover, in the powder urea storage container 5, the shape of the lower cover part 23 is changed. Specifically, the frame body portion 231 fixed to the main body portion 21 is tapered toward the plate lid portion 232. The size of the opening by the plate lid 232 is smaller than the cross section of the main body 21. In the powder urea storage container 5, the shape of the lower lid portion 23 is changed to correspond to the powder urea inlet in the urea water production apparatus 3. As described above, in order to improve the workability related to the introduction of the powdered urea into the urea water production apparatus 3, the shape and configuration of each part of the powdered urea storage container can be changed as appropriate.

  FIG. 5 is a view showing a powder urea storage container 6 according to a second modification. The powder urea storage container 6 is different from the powder urea storage container 2 shown in the above embodiment in that it does not have the lower lid portion 23.

  In the powder urea storage container 6, the lower lid portion 23 is not provided, and the main body portion 21 has a bottom portion 211. FIG. 5 shows a configuration in which a plurality of tires 27 are provided on the bottom portion 211 and are movable. Further, the point that the main body 21 is provided with the pipe 25 and the jet outlet 26 is the same as the powder urea storage container 2.

  In this powder urea storage container 6, when powder urea is charged into the urea water production apparatus 3, the powder urea in the powder urea storage container 2 is directly charged into the inlet, but from the upper lid 22 side. The point of charging is different from the powdered urea storage container 2. That is, as shown in FIG. 5, the powdered urea storage container 2 is rotated and powdered urea is introduced into the urea water production apparatus 3 from the opened upper lid part 22.

  If a part of the powder urea in the powder urea storage container 6 is solidified and it is not easy to put the powder urea from the main body 21, the pipe 25 is used similarly to the powder urea storage container 2. By spraying warm water inside the main body 21, the powdered urea can be dissolved and dropped. Specifically, as shown in FIG. 5, a hot water supply pipe 40 provided in the ship 1 is connected to the connector 24, and hot water is supplied from the hot water supply pipe 40, so that the connector 24 is connected. Hot water flows in the pipe 25. Hot water in the pipe 25 is supplied into the main body 21 from the plurality of jets 26. With this warm water, the powdered urea solidified on the inner surface of the main body 21 is dissolved and easily dropped from the main body 21.

  In this way, even when the lower lid portion 23 is not provided, when discharging the powdered urea from the upper lid portion 22 side, it is solidified by sprinkling hot water into the main body portion 21 through the pipe 25 and the jet port 26. Even the powdered urea can be easily charged into the urea water production apparatus 3.

  The preferred embodiment of the present invention has been described above, but the present invention is not limited to the above embodiment.

  For example, in the above embodiment, the configuration assuming that the powder urea storage container is handled as a single unit has been described. For example, when storing powder urea, a plurality of powder urea storage containers may be combined and arranged in the ship 1. Good. In such a case, it can also be set as the shape which can combine a some powder urea storage container.

  Moreover, although the powder urea storage container demonstrated the structure provided with the sprinkling means which spreads water on the inner surface of a container in the said embodiment, the lower cover part 23 as a means opened and closed downward like the powder urea storage container 2 is provided. In the case where it is provided, even if no means for watering is provided, there is an effect that the urea water production apparatus 3 can be easily charged as compared with a conventional storage container.

  In the above embodiment, the case where one connector 24 is attached to the pipe 25 has been described. In this case, the supply amount of hot water from the jet nozzle 26 is determined by the supply amount of hot water supplied to the pipe 25. On the other hand, it is good also as a structure which can control the supply_amount | feed_rate of the warm water supplied to the inside of the main-body part 21 from the jet nozzle 26 for every jet nozzle 26 or every several jet nozzle 26. FIG. As such a configuration, for example, a configuration in which a valve is provided for the pipe 25 between the ejection ports 26 and the hot water supply amount is controlled by opening and closing the valve can be mentioned. Moreover, it is good also as a structure which provides a some hot water supply system by providing the combination of the piping 25 connected from the connector 24 and the connector 24 two or more. Moreover, you may combine these structures. Thus, the configuration relating to the watering means for spraying water inside the powdered urea storage container can be changed as appropriate.

  DESCRIPTION OF SYMBOLS 1 ... Ship, 2, 5, 6 ... Powder urea storage container, 3 ... Urea water production apparatus, 21 ... Main-body part, 22 ... Upper cover part, 23 ... Lower cover part, 24 ... Connector, 25 ... Piping, 26 ... Spout , 27 ... tires, 28 ... hanging parts.

Claims (4)

A powder urea storage container used in a ship equipped with a urea water production device,
A sealed type container for storing powdered urea, and having a charging means for charging powdered urea inside the urea water production apparatus.   The powder urea storage container according to claim 1, wherein the charging means is watering means for spraying water inside the container.   The powdered urea storage container according to claim 2, wherein the watering means sprays water at a predetermined distance from the inner surface of the container. The powder urea storage container according to any one of claims 1 to 3, wherein the charging means includes means for opening and closing the container below the container.

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