JP2009051552A - Method and apparatus for storing plurality of chemical products in one container - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method and apparatus for storing a plurality of chemical products in one container which enables the plurality of products quickly solidified, to be introduced and extracted in a liquid state, and also enables a part of the product which has been introduced into the container to stay in a solid state. <P>SOLUTION: The carrying out of the product from a container at the end of the storage is performed in such a manner that the liquid product which is originated from the manufacture or circulated is made to flow into the container (1) by making it pass through a feeding pipe (5) which is made of a thermally conductive material and substantially vertical, and is substantially horizontally distributed over the cross sectional surface of the container (1) under at least one fusing mechanism (3 and 8) made of a thermally conductive material. At that time, the heat content of the liquid product is used for fusing the product contained in the container (1) related to the thermal conductivities of the feeding pipe (5) and one or a plurality of fusing mechanisms (3 and 8). Then, the product is vertically discharged along the feeding pipe (5) through at least one horizontal stream under one or the plurality of fusing mechanisms (3 and 8). <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention is intended to be transported and further processed in liquid form, but to include a plurality of chemical products, particularly a plurality of chemical substances, having a melting point higher than the desired or normal storage temperature. The present invention relates to a method and apparatus for storage in one container.

  These materials are easiest to store in multiple heated containers. This is because extraction and introduction do not pose any difficulty in this case. However, this is associated with high energy costs for continuous heating. Furthermore, there are disadvantages that in some cases aging reactions and undesirable reactions with impurities are accelerated as the temperature increases.

  During long-term storage, it is energetically advantageous to store the product in solid or coagulated form and liquefy as necessary a portion intended to be removed.

  The above problems occur, for example, in the case of heavy oil storage. Heavy oils are viscous at ambient temperatures and may solidify completely during cold and winter storage. Various devices have been developed for the storage of heavy oil that allow storage in at least partially solidified state.

  Patent document 1 is disclosing the storage container which has a means to suck out viscous liquid. The container is provided with a heatable capture hood to properly heat a portion of the viscous liquid and allow it to flow for extraction. This apparatus method is only suitable for viscous liquids and not for fully solidifying substances. This is because the solidified solid cannot flow continuously under the hood.

  Patent Document 2 discloses a method for storing a plurality of products, such as heavy oil, which are heavy and solidify at a normal temperature in the basement. In this method, at least one circulating hot liquid is brought into contact with the surface of the solidified product and the liquefied product is pumped out. This method is designed for a plurality of underground ducts and requires a relatively large amount of pumping work in order to flush the stored product with hot liquid flowing continuously around it. This operation is longer when a crystallized product having a high heat of fusion is stored. For heavy oil, flushing with water is possible, but this is not appropriate for all products.

  Further, Patent Document 3 discloses a bitumen container. A vertical pipe is provided in the container, and the open upper end communicates with the inlet pipe, and the lower end is located above the bottom of the container with a gap. When fresh hot bitumen is injected into a vertical tube from above, fresh hot bitumen is introduced into the container from the bottom up, based on the principle of multiple communicating tubes. Thus, at the end of filling, fresh hot bitumen is present in the lower area of the container. Thereby, the container for bitumen can be used for a predetermined period immediately after filling without any external heating.

For the introduction of a plurality of products that solidify very rapidly, for example a plurality of organic chemical products that solidify in a narrow crystallization zone, a plurality of known devices and methods are not or are not suitable. For example, dimethyl terephthalate (DTM, C ₁₀ H ₁₀ O ₄ ) having a melting range of 140.6 ° C. is provided in liquid form for the plastics industry and is therefore relayed in advance in liquid form. This has been done so far at high energy costs in heated containers.
DE534084 DE24332955 DE8331135U1

  Accordingly, an object of the present invention is to introduce and extract a plurality of products that rapidly solidify in a liquid state and to allow a part of the products introduced into the container to be in a solid state. And a method and apparatus for storing a plurality of chemical products.

  In order to solve this problem, the present invention proposes a method for storing a plurality of chemical products in one container. In this method, the product in the liquid state is introduced into the container at a temperature above the melting temperature, where it remains at least partially solidified until withdrawal at lower ambient temperatures. In the method of the present invention, the removal of the product from the container at the end of the storage is such that the liquid product originating from the production or being circulated is passed through a substantially vertical tube of thermally conductive material into the container. And is distributed across the cross-section of the container substantially horizontally below the at least one melting mechanism of thermally conductive material, wherein the heat capacity of the liquid product is distributed between the conduit and one or more melting In conjunction with the thermal conductivity of the mechanism, it is used to melt the product in the container so that the product is vertical via at least one horizontal flow below the one or more melting mechanisms and along the conduit. It is made to be discharged.

The container is in particular a tank, ie a storage container having a storage capacity of greater than 1 m ³ , preferably greater than 5 m ³ and generally comprising a supply pipe and a discharge pipe.

In an advantageous embodiment of the invention, the conduit and possibly the area below the melting mechanism are evacuated after the flow of the liquid product and filled with gas until the next use. The gas to be blown is intended to be gentle on the product, ie inert and compressible as easily as possible. Depending on the product, for example, air, nitrogen, CO ₂ or noble gases are suitable.

  A liquid product can further be formed on the outside of the core of the product which is solidified and stored at a temperature below the melting point by means of an inner wall heating means provided on at least one outer wall of the container. The product liquefied by the outer wall can then be used to melt other carried products, or for reliable pressure equalization during storage, i.e., multiple container walls and interiors Used to protect parts. During a plurality of predetermined storage or extraction stages or generally when the product is kept in liquid form along the supply tube and below at least one melting mechanism, the inner wall heating means removes the liquid from the solidified product. A substantially annular core surrounded by the product is formed. This core facilitates active mixing of the surrounding product.

  The carry-out of the product melted by the inner wall heating means is preferably done in a plurality of vertical channels which can be formed, for example, by a heat exchanger provided on the inner wall for the inner wall heating means.

  In this way, it can be carried out so that all the stored liquid product is solidified in the container. In this case, the supply pipe is kept emptied by the gas guided through the supply pipe after the liquid product during the solidification or crystallization process. According to the level, ie in particular at the maximum or almost maximum level, the lower surface of the (upper) melting mechanism is kept empty by gas or by exhaust.

  Alternatively, in this method, a part of the product stored in the container is kept in liquid form during storage by heating by means of a plurality of heating elements, in particular inner wall heating means and / or supply tubes and / or melting mechanisms. . Since the supply pipe and the melting mechanism are made of a heat conductive material in the present invention, both can be easily heated.

  In order to melt the solidified product, it is preferred that a part of the product is circulated by a heated additional container connected to the container. The product can be circulated in the container in an embodiment of the invention. For this purpose, for example, a bottom heating means may be further provided on the side of the outer wall heating means.

  Melting is preferably done in a corresponding movement of a plurality of melting mechanisms, in particular by liquefaction which proceeds from top to bottom and / or from bottom to top.

In particular, in order to carry out the method, the present invention further proposes an apparatus for storing in the container these chemical products having a melting point lower than the storage temperature range in order to solve the above problems. This device
A container,
A supply pipe for a liquid product and gas, which extends in a substantially vertical direction in the container and consists of a thermally conductive material;
Extends substantially horizontally across the cross-sectional area of the container, is made of a thermally conductive material, is provided around the supply pipe and is used to guide and distribute the supplied liquid product At least one melting mechanism;
And at least one discharge pipe.

  The discharge pipe can have a valve at the inlet of the supply pipe, similar to the supply pipe.

  The melting mechanism is provided so as to be movable along the supply pipe. This allows melting to proceed from top to bottom or from bottom to top.

  In a particularly preferred embodiment, the supply tube is formed as a nested tube. The container is preferably at least partly cylindrical in all embodiments, and the supply pipe is provided along the axis of the cylinder. In alternative embodiments, the container or tank may have a square or rectangular cross section. In all the embodiments, the supply pipe is preferably provided in the center. The melting mechanism preferably has a hat-like shape and has an upper melting mechanism provided at the end of the supply pipe. The upper melting mechanism has, in an advantageous embodiment of the invention, a floating body, preferably in the form of a floating ring. The float ring can keep the upper melting mechanism at a predetermined height, below and at the level of the product. The filling mechanism can be adjusted to sink higher or lower by filling the floating ring with gas or partially with gas and partially liquid or with a suitable medium. For example, if a heating element is provided in the chamber of the floating ring, the floating ring can also be used for heat supply.

  In one embodiment of the invention, the melting mechanism further comprises a lower melting mechanism. This melting mechanism preferably extends annularly around the supply tube at one third of the lower part of the container.

  The one or more melting mechanisms have a plurality of downwardly facing interior parts in the form of a plurality of flow resistance means. These flow resistance means are used to distribute the liquid product evenly below each melting mechanism. This is also done by partial blockage and vigorous agitation (Verwirbeln).

  Inner wall heating means may be further provided on at least one outer wall, preferably a cylindrical outer wall. The inner wall heating means may incorporate a plurality of flow paths for carrying the product (generally downward). The melting of the channel (Kanalschmelzen) prevents damage to the container due to thermal expansion. This is because the containers are not subjected to mechanical loads since the escape of the generated forces is always guaranteed. If the device is provided with a plurality of channels, especially along the outer wall with separate vertical heating means, this method first involves the solidified product being melted in the plurality of vertical channels. Then, it can be carried out so that the cross section melts and is emptied below the melting mechanism. The melt from the horizontal melt can then flow out through a plurality of pre-formed vertical channels.

  The inner wall heating means preferably reaches a position above the maximum level of product in the container so that the entire inner wall can be kept away from the solidified product. The upper melting mechanism can be provided with a plurality of guide elements. These guiding elements appropriately engage the inner wall heating means and ensure a continuous geometrically well-defined melting zone.

  In order to inspect the filling and storage conditions of the product, a plurality of measuring sensors may be provided, preferably on one melting mechanism or a plurality of melting mechanisms and / or on the outer wall.

  Appropriate measurement methods can determine whether and how much product is present and whether the gas phase is below the melting mechanism.

  Spatally related to the outlet of the supply pipe, an asymmetrical distribution element is provided which can be repositioned, for example in the form of a deflector, by means of this distribution element to distribute the product to the product being introduced or withdrawn. Can give priority directions. This can compensate for the temperature difference by the cross-sectional area of the container when the container is empty. In cold areas, the dispensing element can introduce more hot liquid product. The purpose is that the solidified product can be evenly melted.

  The container can be composed of a plurality of parts. In particular, a plurality of melting mechanisms, supply pipes and discharge pipes may be provided on the top of the container that does not have a bottom. The container top is placed on a trunk without a lid. Therefore, when summarized, a two-part container according to the present invention results. The discharge pipe is in the lower area of the barrel (for example the lower one fifth area) or is preferably additionally provided at the top of the container. From there, the stored and melted product can be sucked off.

  Hereinafter, the present invention will be described based on a plurality of embodiments shown in the drawings. In particular, the container 1 is a container suitable for a product having a cylindrical or parallelepiped structure, and includes a plurality of the following main components.

  The inner wall heating means 2a provided on the outer wall 2 of the container must be adjusted to the expected force, required thermal efficiency and mechanical and hydraulic action.

  The upper melting mechanism (Schmelzorgan) 3 includes a cylinder (hat 3a) directed toward the upper center, a plurality of deflectors 10 (a plurality of interior parts, a plurality of flow resistance means) and a closing edge 6 ( A plurality of guide rails).

  The plurality of floats 4 can be formed as floating rings and form components in the upper melting mechanism 3. Several other floating bodies or segmented structures are possible. The floating ring 4 is preferably suspended between a hat 3a and an edge 6 of the upper melting mechanism 3 with a plurality of adjustable coupling means (ropes).

  The supply pipe 5 may be a nested pipe that is automatically drawn out by the buoyancy of a plurality of floating rings 4 provided in the upper melting mechanism 3 or a nested pipe that is drawn out by motor control instead. The telescoping tube or supply tube 5 is optionally coupled to the distribution element 9. The purpose is that the product can be specially guided. In other cases, the product is introduced via a nested tube, preferably in the middle. The plurality of guide rails 6 are attached to the upper melting mechanism 3 to ensure a distance between the upper melting mechanism 3 and the inner wall heating means 2a. The inner wall heating means 2a protrudes from the plurality of guide rails 6 by a predetermined number of heating elements.

  The filling and discharging pipe 7 may be a quarter inch pipe (Vierteirohr) welded to the bottom around the supply pipe 5. The quarter inch pipe has a plurality of openings for evenly distributing heat in the direction of the bottom of the container. The filling and discharging tube 7 can be heated by a separate heat coil or by the heat of the supply tube 5.

  The lower melting mechanism 8 can have a plurality of relief valves. These relief valves allow flow when product is discharged below the relief valves or when pressure increases above the plurality of relief valves.

  The dispensing element 9 is moved by the drive means to any position defined by a person or process control device.

  The plurality of interior parts 10 in the form of a plurality of deflectors 10 provided on the lower surfaces of the plurality of melting mechanisms 3 and 8 are used as flow resistance means for distributing and stirring vigorously the liquid product.

  A plurality of measurement sensors 11 and contacts are used to monitor the product level and storage state.

  The plurality of floats 12 are used to determine what the spacing between the plurality of melting mechanisms 3, 8 and the product is, i.e. whether gas must still be supplied.

  FIG. 1 shows a (storage) container generally designated by reference numeral 1, here a cylindrical container having an inclined roof and standing on the bottom of the cylinder. An inner wall heating means 2 a is attached to the cylindrical outer wall 2. This inner wall heating means here actually covers the entire cylinder skin. In the center of the bottom of the container 1, a telescoping tube as a supply pipe 5 for a liquid still hot product protrudes into the container and is shown here fully extended. At the upper end of the supply pipe 5, a plate-like upper melting mechanism 3 is provided. A hat-shaped central portion (hat) 3 a of the melting mechanism is covered on the supply pipe 5. A plurality of spacers, for example in the form of sieve plates, can be provided at the upper end of the supply pipe 5 spaced from the melting mechanism 3 (not shown here). The melting mechanism 3 has a plurality of floats 4 which here take the form of floating rings. As shown in FIG. 1 a, the floating ring 4 is suspended by a plurality of ropes extending in the radial direction from the hat 3 a to the edge of the melting mechanism 3. FIG. 1 a shows the melting mechanism with the floating ring 4 in a plan view from above. FIG. 1d shows a similar variant for a container having a square cross section. The floating ring 4 is divided into a plurality of parts or individual floats. A plurality of guide rails 6 for guiding the inner wall heating means 2 a are provided at the edge of the upper melting mechanism 3. Finally, a plurality of deflectors 10 for evenly distributing the products, i.e. a plurality of interior parts 10 facing downward from the melting mechanism 3 are provided. These interior parts 10 can be specially designed as shown in FIG. 1b and in particular 1c for a number of special embodiments. 1b and 1c show a variation of the plurality of melting mechanisms 3 as seen from below. These embodiments are equally possible with respect to the lower melting mechanism 8 described below.

  FIG. 2 shows a container 1 similar to the container shown in FIG. However, the difference is that a lower melting mechanism 8 in the form of a platform is provided around the supply pipe 5 in the lower area of the container and near the bottom. As described above, the lower melting mechanism 8 may be provided with a plurality of relief valves. FIG. 2 shows that the floating body keeps the melting mechanism 3 against the surface of the product in the container 1. The reference symbol A is attached to the surface. The plurality of floating bodies 4 (floating rings) are partially filled with liquid as shown here. The purpose is that the height of the melting mechanism, i.e. the relative position of the melting mechanism with respect to the product level, can be precisely adjusted.

  A possible embodiment for the inner wall heating means 2a is shown in FIG. 2a. In the heat exchanger provided for heating the wall, a plurality of vertical flow paths 2b are formed. These channels are used to carry the liquefied product vertically towards the bottom. FIG. 2b shows the inner wall heating means corresponding to FIG. 2a as a container having a square cross section. There, if the lower melting mechanism keeps the bottom section melted, the product can be removed by means of a plurality of discharge means near the edge or near the central supply tube.

  FIG. 3 shows the same container as in FIG. 2 in a state of being almost or completely emptied and with the telescopic tube 5 retracted.

  FIG. 4 shows the same container as FIG. 1 but with a central filling and discharging tube 7. The quarter inch pipe welded at the bottom around the telescoping tube 5 has a plurality of openings for even distribution of heat and product.

  FIGS. 5 and 6 show a container 1 which is the same as FIG. 2 or 3 but with an additional dispensing element 9. The dispensing element is moved by the drive means to any position defined by a person or process control device.

  For example, in the case of waste liquid (Ausschwemmen), when the product is cold on one side of the container, the dispensing element is lowered to a position where the hot side is shielded. The rising hot product penetrates into multiple cold areas of the container. The distribution element is incorporated in the melting mechanism 3, here a cylindrical hat 3a, and is associated with the lower telescopic tube 5 via the cylinder. This cylinder ensures an even supply of the product and protects the members located on the cylinder. The distribution element is guided by a plurality of vertical guide rails and a spindle 9a between the melting mechanism hat 3a and the distribution element 9 and having drive means. At least two space rings and limit stoppers always guarantee guidance. A part of the distribution element 9 remains in the upper hat-shaped part of the upper melting mechanism 3. The purpose is to prevent tilting. When the dispensing element 9 is required, the dispensing element is lowered by the spindle 9a until the plurality of vertical guide rails are no longer fitted. The spindle 9a capable of shifting the height does not have a screw at the lower end and has only a stopper for continuously rotating the distribution element 9. The distribution element 9 is on the limit stopper and is brought to the desired position in the same rotational direction by the drive means. If the distribution element 9 is not necessary, the direction of rotation of the drive means can be changed. At this time, the spindle 9a is lowered and the screw is engaged. The purpose is to lift the dispensing element 9 upward again. The plurality of guide rails are fitted again, and the driving means is turned off.

  FIG. 7 shows details between the outer wall 2 and the melting mechanism 3 (also possible with the melting mechanism 8). For example, whether or not the upper melting mechanism 3 is in the horizontal direction (B) is determined by the laser measurement method. The horizontal position of the two melting mechanisms 3 and 8 can also be controlled by tilt measuring means. The float 12 determines whether the nitrogen is sufficiently stored. When the float floats, nitrogen must be blown in some cases. The float can also determine whether the level is the same above the cross section of the container, i.e. whether a dispensing element 9 is used. Finally, this measures whether a small amount of product must be removed from the container so that the melting mechanism descends more slowly. Furthermore, a plurality of measurement sensors 11 may be provided on the plurality of interior parts 10 in some cases.

  FIG. 8 is another embodiment of the present invention. In this embodiment, the melting mechanism 3 is attached to the top 1a of the container by a supply pipe 5a and a discharge pipe 5b. The top 1a of the container is placed on an open barrel 1b. As a result, a multi-part container is produced. The stored product level is marked with the reference symbol “A”. The function of the melting mechanism has already been described above. The suction of the liquefied product is here done by suction from above through the discharge tube 5b. The removal of the product is first done around the valve ball, which is appropriately determined from the weight and volume, and during the almost complete discharge by the additional suction pipe 5b 'for removal of the rest.

  The container can generally consist of any suitable material, in particular metal or plastic. The container is telescopic in an empty state, for example, by using a flexible plastic.

1 is a longitudinal cross-sectional view of an exemplary embodiment storage container. FIG. FIG. 3 is a top view of an exemplary embodiment of multiple melting mechanisms. FIG. 5 is another view of an exemplary embodiment of multiple melting mechanisms viewed from below. FIG. 6 is still another view of an exemplary embodiment of multiple melting mechanisms from below. FIG. 5 is still another view of an exemplary embodiment of multiple melting mechanisms viewed from above or below. FIG. 2 is an illustration of the storage container shown in FIG. 1 having a plurality of additional melting mechanisms provided near the bottom. The cross-sectional view of the inner wall heating means for a cylindrical container. The cross-sectional view of the inner wall heating means for a parallelepiped container. FIG. 3 is a longitudinal sectional view of the storage container shown in FIG. 2 in an empty state. 1 is a longitudinal cross-sectional view of an exemplary embodiment storage container. FIG. FIG. 3 is a longitudinal sectional view of the storage container shown in FIG. 2 with an additional dispensing element. FIG. 3 is another longitudinal cross-sectional view of the storage container shown in FIG. 2 with additional dispensing elements. The figure of the part between an outer wall and a melting mechanism. The longitudinal cross-sectional view of the top container covered with the trunk | drum.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Container, 1a ... Top part of container, 1b ... Base container / body, 2 ... Outer wall of container, 3 ... Upper melting mechanism, 3a ... Hat, 4 ... Float, 5 ... Supply pipe in the form of a nested pipe, 5a ... Supply pipe, 5b ... discharge pipe, 5b '... additional suction pipe, 6 ... guide rail provided in upper melting mechanism, 7 ... filling and discharging pipe, quarter inch pipe, 8 ... lower melting mechanism, 9 ... distribution element DESCRIPTION OF SYMBOLS 10 ... Deflector (interior part), 11 ... Measuring sensor, 12 ... Float.

Claims (15)

  A method for storing a plurality of chemical products in one container (1), wherein the liquid product is introduced into the container at a temperature higher than the melting temperature, where the ambient temperature is lowered The removal of the product from the container at the end of storage, at least partially solidified, until the withdrawal is substantially vertical when the liquid product derived from the manufacture or circulated is made of a thermally conductive material. Through the supply pipe (5) and into the container (1), and substantially horizontally below the at least one melting mechanism (3; 8) made of a thermally conductive material. ), Wherein the heat capacity of the liquid product is related to the thermal conductivity of the feed tube (5) and the one or more melting mechanisms (3; 8), Melt the product in the container (1) So that the product is discharged vertically via at least one horizontal flow below the one or more melting mechanisms (3; 8) and vertically along the feed pipe (5). How to be done.   The method according to claim 1, characterized in that the supply pipe (5) is emptied after distribution of the liquid product and filled with gas until the next use.   Method according to claim 1 or 2, characterized in that the area below the melting mechanism (3; 8) is emptied after the liquid product has been distributed and filled with gas until the next use.   The inner wall heating means (2a) provided on at least one outer wall (2) of the container (1) further forms a liquid product outside the core of the product solidified and stored at a temperature lower than the melting point, 4. A method according to any one of claims 1 to 3, characterized in that this liquid product is preferably used to melt other carried products for pressure equalization during storage.   During storage, a part of the product stored in the container has a plurality of heating elements, in particular the inner wall heating means (2a) and / or the supply pipe (5) and / or the melting mechanism (3; The method according to any one of claims 1 to 4, wherein the method is maintained in a liquid state by heating according to 8).   In order to melt the solidified product, a part of the product is circulated by a heated additional container connected to the container (1) or circulated in the container (1). 6. A method according to any one of the preceding claims, characterized in that it is characterized in that   7. Melting by liquefaction which proceeds from top to bottom and / or from bottom to top is performed in a corresponding movement of the plurality of melting mechanisms (3; 8). The method according to any one of the above. A method for storing a plurality of chemical products having a melting temperature lower than the storage temperature range in one container (1), in particular for carrying out the method according to any one of claims 1 to 7. A device,
A one-part or multi-part container (1);
A supply pipe (5) for a liquid product and gas, which extends in a substantially vertical direction in said container (1) and consists of a thermally conductive material;
It extends substantially horizontally across the cross section of the container, is made of a thermally conductive material, is provided around the supply pipe (5), and guides and distributes the supplied liquid product. At least one melting mechanism (3; 8) used for
An apparatus comprising at least one discharge pipe.   In particular, the melting mechanism (3; 8) is provided so as to be movable along the supply pipe (5) by forming the supply pipe (5) as a nested pipe. The apparatus according to claim 8.   10. An apparatus according to claim 8 or 9, characterized in that one upper melting mechanism (3) has a hat-like shape and is provided at the end of the supply pipe (5).   11. An apparatus according to any one of claims 8 to 10, wherein the melting mechanism (3; 8) comprises a lower melting mechanism (8).   12. The device according to claim 8, wherein the upper melting mechanism (3) has a floating body (4), in particular in the form of a floating ring (4).   13. The melting mechanism (3; 8) comprises a plurality of interior parts (10) facing downwards in the form of a plurality of flow resistance means. The apparatus according to any one of the above.   14. The container (1) according to any one of claims 8 to 13, characterized in that it has inner wall heating means (2a) on at least one outer wall (2), in particular on a cylindrical outer wall. The device described in 1.   In relation to the outlet of the supply pipe (5), an asymmetrical distribution element (9) is provided which can be repositioned, in particular in the form of a deflector, by means of this distribution element during introduction or withdrawal. 15. A device according to any one of claims 8 to 14, characterized in that the product can be given a priority direction in product distribution.

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