Iodine recovery method and iodine recovery device

Abstract

The present disclosure provides an iodine recovery method and an iodine recovery apparatus in which the amount of iodine discharged without being recovered is reduced and the recovery rate of iodine can be improved. The iodine recovery apparatus according to an exemplary embodiment of the present disclosure can include a main chamber in which gaseous iodine is cooled and precipitated by contact with a main solvent; an upper injection portion disposed at an upper portion of the main chamber and having an injection hole formed therethrough to enable the main solvent to be injected from the upper portion to a lower portion; an inflow duct disposed lower than the upper injection portion and connected to the main chamber to enable the gaseous iodine to flow into an inside of the main chamber; and a separation chamber in which the precipitated iodine and the main solvent precipitated from the main chamber flow and the precipitated iodine and the main solvent are separated.

Description

Technical Field

[0001] This disclosure relates to iodine recovery methods and iodine recovery devices. Background Technology

[0002] Iodine is a high-value substance used in a variety of chemical processes, and technologies for recovering iodine from the mixed gases generated after the reaction are currently being researched.

[0003] Typically, to recover iodine from a gas mixture, a method is used to precipitate iodine in solid form (sublimation) by cooling.

[0004] This method may lead to pipe blockage, reduced heat transfer, and process interruption due to the precipitated iodine adhering to the inner wall of the device. In particular, these problems are exacerbated when solid iodine accumulates to a certain thickness, thus limiting the ability to run the process continuously. Summary of the Invention

[0005] Technical problems to be solved

[0006] This disclosure provides an apparatus and method for separating and recovering iodine from a gas mixture.

[0007] Technical solution

[0008] An iodine recovery apparatus according to an exemplary embodiment of the present disclosure may include: a main chamber for gaseous iodine to contact with a main solvent to be cooled and precipitated; an upper spray section disposed above the main chamber and having spray holes through it to allow the main solvent to be sprayed from the upper to the lower part; an inflow pipe disposed below the upper spray section and connected to the main chamber to allow the gaseous iodine to flow into the interior of the main chamber; and a separation chamber in which the iodine and the main solvent precipitated from the main chamber flow into the separation chamber, and the precipitated iodine and the main solvent are separated in the separation chamber.

[0009] In an exemplary embodiment, a dispersion plate may also be included, installed inside the main chamber for dispersing the gaseous iodine.

[0010] In an exemplary embodiment, at least one tray may also be included, mounted below the upper spray section, for guiding the movement of the main solvent and the precipitated iodine.

[0011] In an exemplary embodiment, the at least one tray may be tilted downward toward the separation chamber.

[0012] In an exemplary embodiment, the at least one tray may be provided in multiple locations along the height direction of the main chamber.

[0013] In an exemplary embodiment, a plurality of the trays may be connected to the separation chamber respectively, and the main solvent and the precipitated iodine on the plurality of trays move to the separation chamber.

[0014] In an exemplary embodiment, the at least one tray may have a through-hole through which the gaseous iodine or the precipitated iodine can pass.

[0015] In an exemplary embodiment, the at least one tray may be coated with any one of a polytetrafluoroethylene (PTFE) film, a polyethylene terephthalate (PET) film, or a tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer (PFA) film.

[0016] In an exemplary embodiment, the precipitated iodine can be separated from the main solvent in the separation chamber and form a layer.

[0017] In an exemplary embodiment, a filter may be installed in the separation chamber, through which the main solvent passes and the precipitated iodine is filtered.

[0018] In an exemplary embodiment, a heat treatment unit may be included to separate the precipitated iodine and the main solvent by heating in the separation chamber.

[0019] In an exemplary embodiment, the heat treatment unit may distill the main solvent in the separation chamber to separate it from the precipitated iodine.

[0020] In an exemplary embodiment, the heat treatment unit can convert the precipitated iodine into liquid iodine by heating the main solvent and the precipitated iodine in the separation chamber. The separation chamber may further include a liquid-liquid separation device configured to receive the supplied main solvent and the liquid iodine, and to perform liquid-liquid separation on the main solvent and the liquid iodine to recover the liquid iodine.

[0021] In an exemplary embodiment, a circulation pipeline may also be included, connected to the main chamber and the separation chamber, for supplying the main solvent, after being separated from the precipitated iodine in the separation chamber, to the main chamber.

[0022] In an exemplary embodiment, a cooler may also be included, connected to the circulation pipeline section, for cooling the main solvent supplied to the main chamber.

[0023] In an exemplary embodiment, a lower spray section may also be included, extending from the upper spray section and disposed at the lower part of the main chamber, the lower spray section being capable of spraying the main solvent into the separation chamber.

[0024] An iodine recovery method according to an exemplary embodiment of the present disclosure may include: a step of spraying a main solvent downward from an upper spray section disposed at the upper part of a main chamber; a step of gaseous iodine flowing into the main chamber; a step of the gaseous iodine contacting the main solvent in the main chamber and being cooled and precipitated; and a step of separating the main solvent from the precipitated iodine.

[0025] In an exemplary embodiment, the main chamber may include a tray configured to guide the movement of the main solvent and the precipitated iodine.

[0026] In an exemplary embodiment, the step of supplying the main solvent separated in the separation chamber to the main chamber may also be included.

[0027] In an exemplary embodiment, in the step of supplying the main solvent separated in the separation chamber to the main chamber, the main solvent may be cooled before being supplied to the main chamber.

[0028] Technical effect

[0029] According to one embodiment of this disclosure, a cryogenic solution is injected into a gas mixture, thereby causing the gaseous iodine contained in the gas mixture to sublimate. Therefore, the amount of iodine discharged without being recovered is reduced, and the iodine recovery rate can be improved.

[0030] Furthermore, according to one embodiment of this disclosure, the liquid or solid iodine is discharged together with the solution, thus preventing its accumulation inside the main chamber. Therefore, a continuous process can be achieved, and maintenance is easy. Additionally, the inflow pipes for the gas mixture will not be blocked, and heat transfer efficiency will not be reduced. Attached Figure Description

[0031] Figure 1 This is a conceptual diagram of an iodine recovery apparatus according to an embodiment of the present disclosure.

[0032] Figure 2 yes Figure 1 The diagram shows a plan view of the dispersion plate.

[0033] Figure 3 It is along Figure 2 Enlarged cross-sectional view of line AA in the middle.

[0034] Figure 4 This is a conceptual diagram of an iodine recovery apparatus according to another embodiment of the present disclosure.

[0035] Figure 5 This is a block diagram illustrating the connection relationships of the constituent elements constituting an iodine recovery apparatus according to an embodiment of the present disclosure.

[0036] Figure 6 This is a flowchart illustrating the operating sequence of the various components of an iodine recovery apparatus according to an embodiment of the present disclosure.

[0037] Figure 7 and Figure 8 This is a flowchart illustrating an iodine recovery method according to an embodiment of the present disclosure. Detailed Implementation

[0038] The embodiments of this disclosure are provided to illustrate the disclosure more completely to those skilled in the art. The following embodiments can be modified in many other ways, and the scope of this disclosure is not limited to the following embodiments.

[0039] Hereinafter, for ease of explanation, some embodiments of the present disclosure will be described with reference to exemplary drawings. When labeling the constituent elements of the various drawings, the same reference numerals will be used as much as possible for the same constituent elements, even if they are shown in other drawings.

[0040] The terms or words used in this specification and claims should not be limited to their ordinary or dictionary meanings, but should be interpreted in accordance with the principle that the inventors may appropriately define terms and concepts in order to best explain their invention, and are consistent with the technical ideas of this disclosure.

[0041] The terminology used in this specification is for describing particular embodiments and not for limiting the scope of this disclosure. As used herein, the singular form may include the plural form unless the context clearly indicates otherwise.

[0042] Furthermore, in the context of explaining and asserting the contents of this disclosure, expressions such as “comprise,” “consist of,” and “have” should be interpreted in a non-exclusive manner. Unless otherwise stated, they imply that the corresponding constituent elements may be included, and therefore should be interpreted as including other constituent elements rather than excluding other constituent elements.

[0043] Furthermore, when describing the constituent elements of embodiments of this disclosure, terms such as first, second, A, B, (a), and (b) may be used. These terms are only used to distinguish the constituent element from other constituent elements, and the nature, order, or sequence of the corresponding constituent elements are not limited by these terms.

[0044] When a specific constituent element is described as being "connected" or "combined" to another constituent element, it should be understood that although a constituent element can be directly connected or combined to the other constituent element, the constituent element and the other constituent element can also be "connected" or "combined" with other constituent elements.

[0045] To facilitate understanding of one element or feature in the illustrations in relation to other elements or features, spatially related terms such as "beneath," "below," "lower," "above," and "upper" may be used. These spatially related terms are used to facilitate understanding of the disclosure in various states of manufacture or use, and are not intended to limit the disclosure. For example, if an element or feature in the drawing is flipped, an element or feature described as "below" or "below" will become "above" or "upper." Therefore, "below" is a concept that includes "above" or "below."

[0046] The embodiments described in this specification and the configurations shown in the accompanying drawings are merely the most preferred embodiments of this disclosure and do not represent all the technical ideas of this disclosure. Therefore, it should be understood that various equivalents and modifications that can replace them may exist at the time of filing this application. In addition, detailed descriptions of well-known functions and configurations that may unnecessarily obscure the key points of this disclosure are omitted.

[0047] Hereinafter, an iodine recovery apparatus according to an exemplary embodiment of the present disclosure will be described in detail with reference to the accompanying drawings.

[0048] Figure 1 This is a conceptual diagram of an iodine recovery apparatus according to an embodiment of the present disclosure.

[0049] Reference Figure 1 An iodine recovery apparatus according to an exemplary embodiment of the present disclosure may include a main chamber 100 and a separation chamber 200.

[0050] An upper jet section 110 may be installed on the upper part of the main chamber 100.

[0051] The upper spray section 110 can be supplied with the main solvent. The main solvent can be sprayed downward from the upper part of the main chamber 100 through the spray hole 111 through the upper spray section 110.

[0052] The main solvent can be a liquid phase substance.

[0053] For example, the primary solvent can be a nonpolar solvent. For example, the primary solvent can be any one of toluene, benzene, hexane, ether, kerosene, or a mixture thereof.

[0054] The gas mixture may contain hydrogen halides such as hydrogen fluoride (HF) or hydrogen iodide (HI). If the main solvent is polar, some components of the gas mixture may react with or dissolve in the main solvent to form a highly corrosive solution. In such cases, damage to the main chamber 100 may occur.

[0055] For example, the primary solvent may include a polar solvent that does not react with the hydrogen halides contained in the gas mixture or is weakly reactive. For example, the primary solvent may include ethanol or chloroform.

[0056] For example, the primary solvent can be a solution with a boiling point below 100°C. Although details will be described below, in the case of distilling the discharged solution containing the primary solvent to recover precipitated iodine, high-temperature energy may be required during the distillation process if the primary solvent has a high boiling point.

[0057] The upper injection section 110 may extend into an elongated structure in one direction. Alternatively, the upper injection section 110 may be formed into a shape corresponding to the cross-sectional shape of the main chamber 100. For example, if the main chamber 100 is cylindrical, the upper injection section 110 may be in the shape of a circular plate.

[0058] The upper spray section 110 may have a spray hole 111 through it. The main solvent can be sprayed from the upper part of the main chamber 100 to the lower part through the spray hole 111.

[0059] Multiple spray holes 111 may be formed on the upper spray section 110. For example, the spray holes 111 may be formed side by side in one direction. Alternatively, the spray holes 111 may be arranged in a zigzag pattern. There are no particular restrictions on the arrangement of the multiple spray holes 111 as long as it is an arrangement that can uniformly spray the main solvent into the main chamber 100.

[0060] A flow pipe 130 for inflowing gaseous iodine can be connected to the main chamber 100. Gaseous iodine can flow into the main chamber 100 through the flow pipe 130. A gaseous mixture containing gaseous iodine can also flow into the main chamber 100 through the flow pipe 130.

[0061] The following description will focus on the scenario where a gaseous mixture containing gaseous iodine flows into the main chamber 100. However, it is obvious that it is also possible for only gaseous iodine to flow in instead of the gaseous mixture.

[0062] The gas mixture can move through inlet pipe 130 and flow into the interior of main chamber 100.

[0063] For example, the gas mixture could be reactor effluent.

[0064] For example, a gas mixture may contain gaseous iodine and non-condensable gases.

[0065] For example, non-condensable gases may include halogenated hydrocarbons. The boiling points of non-condensable gases, excluding iodine vapor, can be below 50°C.

[0066] For example, if the boiling point of a non-condensable gas is above 50°C, the gas may dissolve in a low-temperature solvent or act as an impurity, thus reducing the iodine recovery rate. Also, if the non-condensable gas is liquefied or sublimated, it may be difficult to separate it from the precipitated iodine that you wish to recover.

[0067] For example, when the boiling point of a non-condensable gas is below 50°C, iodine can be selectively recovered from substances contained in the gas mixture and the purity of iodine can be improved.

[0068] The temperature of the gas mixture flowing into the main chamber 100 through the inflow pipe 130 can be between 150°C and 250°C.

[0069] The gas mixture can be heated before flowing into the inlet pipe 130. Alternatively, the temperature of the gas mixture can be increased by heating the inlet pipe 130.

[0070] For example, the air pressure inside the main chamber 100 can be from 1 atmosphere to 3 atmospheres. At this time, when the temperature of the gas mixture is between 150°C and 250°C, iodine contained in the gas mixture flowing into the main chamber 100 can flow in in a gaseous state.

[0071] The gas mixture can flow into the main chamber 100 through the inflow pipe 130.

[0072] The gas mixture flows into the main chamber 100 and rises, where it can come into contact with the main solvent.

[0073] For example, the temperature of the main solvent can be below 50°C.

[0074] A high-temperature gas mixture can be contacted with a primary solvent below 50°C. The contacting gas mixture and primary solvent can exchange heat. Gaseous iodine contained in the gas mixture can be cooled by the primary solvent. The gaseous iodine can be converted into solid iodine. At least a portion of the gaseous iodine precipitates out as solid iodine.

[0075] The inflow pipe 130 can be positioned lower than the upper jet section. For example, based on the height direction of the main chamber 100, the inflow pipe 130 can be positioned lower than the center of the main chamber 100. The height direction of the main chamber 100 can be a direction parallel to gravity.

[0076] With the inflow pipe 130 positioned lower and more centrally than the main chamber 100, the upward path of the gas mixture can be lengthened. This allows for a longer contact time between the gas mixture and the main solvent. It also allows for a longer contact time between gaseous iodine and the main solvent, and a longer time for the gaseous iodine to precipitate from the main solvent.

[0077] A dispersion plate 140 can be installed in the main chamber 100.

[0078] The dispersion plate 140 can be installed above the inflow pipe 130. The gas mixture flowing into the main chamber 100 through the inflow pipe 130 can pass through the dispersion plate 140. The gas mixture is dispersed within the main chamber 100 by passing through the dispersion plate 140.

[0079] The dispersion plate 140 can be a shape corresponding to the cross-sectional shape of the main chamber 100. For example, if the main chamber 100 is cylindrical, the dispersion plate 140 can be a circular plate shape.

[0080] Figure 2 yes Figure 1 The plan view of the dispersion plate shown. Figure 3 It is along Figure 2 Enlarged cross-sectional view of line AA in the middle.

[0081] Reference Figure 2 and Figure 3 Multiple dispersion holes 141 can be passed through the dispersion plate 140.

[0082] Multiple dispersion holes 141 can be arranged regularly on the dispersion plate 140. Multiple dispersion holes 141 can also be arranged irregularly on the dispersion plate 140. There are no particular restrictions on the arrangement of the dispersion holes 141 as long as it enables the gas mixture to be dispersed inside the main chamber 100.

[0083] For example, the dispersion holes 141 can be densely formed approximately at the center of the dispersion plate 140 along its length. The dispersion method of the gas mixture can be adjusted by the arrangement of the dispersion holes 141. When the dispersion holes 141 are densely formed at the center of the dispersion plate 140, the gas mixture can be densely distributed at the center of the main chamber 100. From the wall of the main chamber 100 towards the center, the gas mixture can gradually be distributed at a higher density.

[0084] A cover member 142 may be disposed on the upper side of the dispersion hole 141. A cover member 142 may be disposed on the upper side of each dispersion hole 141. Alternatively, a cover member 142 may be disposed on the upper side of a portion of the dispersion holes 141.

[0085] The cover member 142 may be spaced apart from the dispersion hole 141. A space may be provided between the cover member 142 and the dispersion hole 141 along the height direction. The cover member 142 may be spaced apart from the dispersion plate 140. A space may be provided between the cover member 142 and the dispersion plate 140. The gas mixture moving upward from below the dispersion plate 140 through the dispersion hole 141 can be dispersed as a whole in the main chamber 100 through the space between the cover member 142 and the dispersion plate 140.

[0086] The cover member 142 may be convex upwards. In this case, the main solvent sprayed from top to bottom may fall along the slope of the cover member 142 onto the side of the dispersion hole 141. For example, the main solvent sprayed from top to bottom may fall onto the dispersion plate 140 instead of the dispersion hole 141. Therefore, it is possible to prevent the main solvent sprayed from top to bottom from reaching the bottom surface of the main chamber 100 through the dispersion hole 141. In this case, the contact time between the main solvent and the gas mixture is prolonged, and thus the iodine recovery rate can be improved.

[0087] The gas mixture can be cooled by contacting the main solvent falling into the internal space of the main chamber 100. Gaseous iodine can be cooled and precipitated by contacting the main solvent. When the gas mixture is in contact with the main solvent in the central part of the main chamber 100, the gaseous iodine can precipitate in the form of solid iodine particles. In contrast, when the gaseous iodine is in contact with the main solvent on the wall of the main chamber 100, crystals may form and grow on the wall of the main chamber 100. In this case, the volume inside the main chamber 100 may decrease. Alternatively, the crystallized solid iodine may become fixed on the wall of the main chamber 100, making it difficult to move to the separation chamber 200.

[0088] A tray 160 can be installed in the main chamber 100.

[0089] Tray 160 guides the movement of the main solvent and gas mixture. It also guides the discharge of the main solvent and gas mixture from main chamber 100 to separation chamber 200.

[0090] For example, tray 160 may be flat. Alternatively, tray 160 may include a flat member and an edge member extending upward from the flat member.

[0091] For example, tray 160 can be installed to tilt downward toward separation chamber 200.

[0092] The main solvent sprayed from above the main chamber 100 may remain on the tray 160. Iodine precipitated upon contact with the main solvent may also remain on the tray 160. When the tray 160 is tilted downwards, the main solvent may move along the slope of the tray 160 due to gravity. The precipitated iodine may be distributed within the main solvent. The precipitated iodine may move along with the main solvent.

[0093] Multiple trays 160 may be provided along the height of the main chamber 100. The number and spacing of the trays 160 may vary depending on the volume or shape of the main chamber 100.

[0094] Each tray 160 can be arranged parallel to each other. The main solvent and precipitated iodine may remain on each tray 160. The main solvent remaining on each tray 160 and the precipitated iodine can move along the inclined surface of the tray 160. The precipitated iodine is distributed in the main solvent and can move through the main solvent.

[0095] The tray 160 has through holes 161 through which the precipitated iodine can pass.

[0096] The gas mixture flowing into the main chamber 100 can move upward through the through-hole 161. The main solvent injected from above the main chamber 100 can be injected into the lower part of the main chamber 100 through the through-hole 161. In the event that gaseous iodine precipitates upon contact with the main solvent, the precipitated iodine can remain on each tray 160. Alternatively, it can move through the through-hole 161 to the tray 160 located below.

[0097] Tray 160 may be coated with a polymer film. Tray 160 may be coated with a material that is low in reactivity with iodine. Tray 160 may be coated with a material that is low in reactivity with the main solvent. For example, tray 160 may be coated with one or more of the following materials: polytetrafluoroethylene (PTFE) film, polyethylene terephthalate (PET) film, and tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer (PFA) film. Tray 160 does not react with the main solvent and iodine remaining on tray 160, and can guide the movement of the main solvent and precipitated iodine.

[0098] Multiple trays 160 may each protrude from the main chamber 100 toward the separation chamber 200. Alternatively, multiple trays 160 may each extend from the main chamber 100 toward the separation chamber 200. Alternatively, multiple trays 160 may each be connected to the separation chamber 200. The main solvent remaining on each tray 160 and the precipitated iodine may move along each tray 160 from the main chamber 100 to the separation chamber 200.

[0099] Figure 4 This is a conceptual diagram of an iodine recovery apparatus according to another embodiment of the present disclosure. Figure 5 This is a block diagram illustrating the connection relationships of the constituent elements constituting an iodine recovery apparatus according to an embodiment of the present disclosure.

[0100] Reference Figure 4 and Figure 5 The main chamber 100 may be equipped with a lower jet section 120.

[0101] The lower jet section 120 extends from the upper jet section 110 and is disposed in the lower part of the main chamber 100. The main solvent can be jetted into the lower jet section 120.

[0102] The lower jet section 120 can jet the main solvent under high pressure. The lower jet section 120 can jet the main solvent towards the separation chamber 200. By jetting the main solvent under high pressure, the lower jet section 120 can move the main solvent deposited in the lower part of the main chamber 100 and the precipitated iodine through pressure. The main solvent deposited in the lower part of the main chamber 100 and the precipitated iodine can be discharged to the outside of the main chamber 100 under pressure. The main solvent deposited in the lower part of the main chamber 100 and the precipitated iodine can be discharged from the main chamber 100 through the lower jet section 120 and flow into the separation chamber 200.

[0103] A connecting passage 170 may be provided between the main chamber 100 and the separation chamber 200. One end of the connecting passage 170 may be connected to the main chamber 100. The other end of the connecting passage 170 may be connected to the separation chamber 200.

[0104] A first valve 171 may be disposed between the connecting channel 170 and the main chamber 100. The first valve 171 may be disposed at one end of the connecting channel 170. The first valve 171 may control the direction of movement of the main solvent. The first valve 171 may close the connecting channel 170. For example, the first valve 171 may close the connecting channel 170 to prevent the main solvent from flowing into the main chamber 100 along the connecting channel 170. Alternatively, the main chamber 100 connected to the connecting channel 170 may be closed. For example, the first valve 171 may close the connecting channel 170 so that the main solvent moves only in one direction from the main chamber 100 toward the connecting channel 170.

[0105] A second valve 172 may be disposed between the connecting channel 170 and the separation chamber 200. The second valve 172 may be disposed at the other end of the connecting channel 170. The second valve 172 may control the direction of movement of the main solvent. The second valve 172 may close the connecting channel. For example, the second valve 172 may close the connecting channel 170 to prevent the main solvent from flowing out of the separation chamber 200 along the connecting channel 170. Alternatively, the separation chamber 200 connected to the connecting channel 170 may be closed. For example, the second valve 172 may close the connecting channel 170 so that the main solvent moves only in one direction from the connecting channel 170 toward the separation chamber 200.

[0106] For example, the first valve 171 and the second valve 172 can be valves that open in only one direction. For example, the first valve and the second valve can be check valves.

[0107] Reference Figure 5 The first valve 171, the second valve 172, and the lower injection section 120 can be connected to the control unit 500. For example, the control unit 500 can control the operation of the first valve 171, the second valve 172, and the lower injection section 120.

[0108] For example, the lower spray section 120 can be switched on / off at preset time intervals. For example, the lower spray section 120 can spray the main solvent for a certain period of time. Afterwards, the lower spray section 120 can be turned off for a certain period of time. For example, a third valve (not shown) may be configured at the end of the lower spray section 120. The control unit 500 can control the third valve to control the on / off state of the lower spray section 120. The control unit 500 can control whether the lower spray section 120 is operating.

[0109] For example, the lower spray section 120 can operate for one hour and then stop.

[0110] When the lower injection section 120 is operating, the first valve 171 and the second valve 172 can be opened. When the lower injection section 120 is operating, the control section 500 can control the opening of the first valve 171 and the second valve 172. In this situation, by the pressure of the main solvent injected by the lower injection section 120, the main solvent and the iodine precipitated in the lower part of the main chamber 100 can move along the connecting channel 170 to the separation chamber 200.

[0111] The opening times of the first valve 171 and the second valve 172 can be the same as the operating time of the lower injection section 120. The closing times of the first valve 171 and the second valve 172 can be the same as the stopping time of the lower injection section 120.

[0112] The operating or stopping times of the lower injection unit 120, the first valve 171, and the second valve 172 can be changed according to the environment. The separation chamber 200 can be connected to the main chamber 100.

[0113] The iodine precipitated in the main chamber 100 can be discharged from the main chamber 100 together with the main solvent and moved to the separation chamber 200.

[0114] The separation chamber 200 may be located on one side of the main chamber 100. The separation chamber 200 may be connected to the main chamber 100 via a tray 160. Alternatively, the separation chamber 200 may be connected to the main chamber 100 via an additional component (not shown) extending from or connected to the tray 160.

[0115] The precipitated iodine moves along tray 160 with the main solvent, so that it can be discharged from the main chamber 100 and flow into the separation chamber 200.

[0116] In separation chamber 200, the iodine precipitated in main chamber 100 can be separated from the main solvent.

[0117] In separation chamber 200, the precipitated iodine can be separated from the main solvent and form a layer.

[0118] For example, the precipitated iodine may be located in the lower part of the separation chamber 200 due to the density difference between it and the main solvent, while the main solvent may be located in the upper part relative to the precipitated iodine.

[0119] For example, in the separation chamber, the precipitated iodine and the main solvent are separated by centrifugation, thus the precipitated iodine and the main solvent can be separated.

[0120] For example, a filter (not shown) may be installed in separation chamber 200. The main solvent, except for the precipitated iodine, passes through the filter, and the precipitated iodine can be filtered out by the filter. The precipitated iodine can be separated from the main solvent by the filter.

[0121] For example, the precipitated iodine and the main solvent can be separated by heat treatment in the separation chamber 200.

[0122] For example, the iodine recovery device may also include a sensor unit 400, which may include a first sensor 410 and a second sensor 420. For example, the first sensor 410 may be connected to the separation chamber 200. For example, the first sensor 410 may be a temperature sensor. The first sensor 410 can measure the temperature of the main solvent flowing into the separation chamber 200.

[0123] After the temperature of the main solvent and the precipitated iodine is measured by the first sensor 410, the control unit 500 can control the heating of the main solvent and the precipitated iodine flowing into the separation chamber 200.

[0124] For example, the control unit 500 can activate the heat treatment unit 700. The heat treatment unit 700 can heat the separation chamber 200. The heat treatment unit 700 can heat the main solvent contained inside the separation chamber 200.

[0125] For example, the heat treatment unit 700 can receive a signal from the control unit 500 to heat the separation chamber 200 to approximately 100°C to distill the main solvent. For example, the separation chamber 200 can be heated to approximately 70°C to 130°C. The heat treatment unit 700 can heat the main solvent flowing into the separation chamber 200 to distill it. As described above, the boiling point of the main solvent can be below 100°C. The precipitated iodine remains solid at 100°C under pressures of 1 to 3 atmospheres.

[0126] When the separation chamber 200 or the main solvent contained within the separation chamber 200 is heated to 100°C, the main solvent is distilled, and the precipitated iodine remains in a solid particle state. Alternatively, the main solvent is distilled, and the precipitated iodine can be liquefied, changing phase to liquid. Thus, the precipitated iodine can be separated from the main solvent by distillation.

[0127] For example, the heat treatment unit 700 can receive a signal from the control unit 500 to heat the separation chamber 200 to 120°C to 150°C. The heat treatment unit 700 can heat the main solvent flowing into the separation chamber 200 and the precipitated iodine. In this case, the precipitated iodine can be converted into liquid iodine.

[0128] like Figure 1As shown, the separation chamber 200 may further include a liquid-liquid separation device 180. Utilizing the density difference between the main solvent and liquid iodine, liquid iodine can be separated from the main solvent through liquid-liquid separation. The density of liquid iodine may be higher than that of the main solvent. Liquid iodine does not mix with the main solvent, and the two can coexist. For example, due to the density difference between liquid iodine and the main solvent, liquid iodine may be located at the bottom while the main solvent is located at the top. Since liquid iodine does not mix with the main solvent, liquid iodine can be separated and recovered through liquid-liquid separation.

[0129] For example, if the main solvent is distilled in the separation chamber 200, only the precipitated iodine remains in the separation chamber 200, so that the precipitated iodine can be recovered in the separation chamber 200.

[0130] The iodine recovery apparatus according to an exemplary embodiment may further include a circulation pipeline section 300 and a cooler 600.

[0131] The circulation piping section 300 can be connected to the separation chamber 200 and the main chamber 100.

[0132] The main solvent, after being separated from the precipitated iodine in the separation chamber 200, can be moved to the main chamber 100 through the circulation pipeline section 300.

[0133] A discharge filter 310 may be installed between the separation chamber 200 and the circulation pipeline section 300. The main solvent contained in the separation chamber 200 can pass through the discharge filter 310 and flow into the circulation pipeline section 300. The precipitated iodine contained in the separation chamber 200 can be filtered by the discharge filter 310. The precipitated iodine contained in the separation chamber 200 may not flow into the circulation pipeline section 300.

[0134] In order to supply the main solvent inside the separation chamber 200 to the main chamber 100, a pump (not shown) may be connected to the circulation pipeline section 300.

[0135] A cooler 600 may be connected to the circulation pipe section 300. The cooler 600 can cool the main solvent moving through the circulation pipe section 300.

[0136] A second sensor 420 may be connected to the circulation pipe section 300. For example, the second sensor 420 may be a temperature sensor. The second sensor 420 may measure the temperature of the main solvent moving through the circulation pipe section 300. The control unit 500 may receive the temperature of the main solvent from the second sensor 420 and control the operation of the cooler 600.

[0137] The main solvent supplied to the main chamber 100 via the circulation pipe section 300 can be cooled by a cooler before being supplied to the main chamber 100. The cooled main solvent can come into contact with gaseous iodine in the main chamber 100. The gaseous iodine can come into contact with the main solvent and be cooled and precipitated.

[0138] For example, the cooler 600 can reduce the temperature of the main solvent supplied from the circulation pipe section 300 to the main chamber 100 to below 50°C. The operation of the cooler 600 can be controlled by the control unit 500. The control unit 500 can receive the temperature of the main solvent from the second sensor 420 and control the cooler 600 to operate so that the main solvent is cooled.

[0139] This is because, due to the characteristics of iodine vapor pressure, when the temperature exceeds 50°C, the iodine vapor pressure will rise sharply, which may result in iodine loss (I2 loss).

[0140] A gas outlet 150 may be formed in the upper part of the main chamber 100.

[0141] When a gaseous mixture comes into contact with a primary solvent, some of its composition may change. For example, iodine contained in the gaseous mixture may dissolve in the primary solvent upon contact. Gaseous iodine may be liquefied or precipitated upon contact with the primary solvent. Other components in the gaseous mixture besides iodine may also come into contact with the primary solvent, thereby dissolving, liquefying, or sublimating.

[0142] A portion of the main solvent may also vaporize upon contact with the gas mixture.

[0143] Thus, after the gas mixture comes into contact with the main solvent, the main solvent and gas mixture may remain inside the main chamber 100. The gas mixture remaining in the main chamber 100 can be discharged to the outside of the main chamber 100 through the gas outlet 150 formed at the top of the main chamber 100.

[0144] Figure 6 This is a flowchart illustrating the operating sequence of the various components of an iodine recovery apparatus according to an embodiment of the present disclosure.

[0145] The following is for reference Figure 6 The iodine recovery process of an iodine recovery apparatus according to an embodiment of the present disclosure will be described.

[0146] An upper spray section 110 may be disposed on the upper part of the main chamber 100. The upper spray section 110 can spray the main solvent from the upper part of the main chamber 100 downwards. The temperature of the main solvent sprayed into the main chamber 100 can be below 50°C.

[0147] An inflow pipe 130 may be installed on one side of the main chamber 100. The inflow pipe 130 may be configured lower than the upper injection section 110. A gas mixture containing gaseous iodine may flow into the main chamber 100 through the inflow pipe 130.

[0148] The gas mixture may flow into the main chamber 100 and come into contact with the main solvent. The gas mixture may be heated to 150°C to 250°C and then flow into the main chamber 100. For example, the gas mixture may be heated and then flow into the inlet pipe 130. For example, the temperature of the gas mixture may be increased by heating the inlet pipe 130.

[0149] The gas mixture can flow into the main chamber 100 and come into contact with the falling main solvent. The gas mixture can be dispersed into the main chamber 100 through the dispersion plate 140. The dispersed gas mixture can be cooled by contacting the falling main solvent. Gaseous iodine can be cooled and precipitated by contacting the main solvent.

[0150] The precipitated iodine and main solvent can move along tray 160. Tray 160 may have a through hole 161. The gas mixture can move upward through the through hole 161 and come into contact with the main solvent.

[0151] Multiple trays 160 may be provided along the height of the main chamber 100. The precipitated iodine and main solvent can pass through the through-hole 161 and move downwards. A portion of the precipitated iodine moves along the tray 160 at the flow rate of the main solvent, thus flowing into the separation chamber 200. A portion of the precipitated iodine can pass through the through-hole 161 and move downwards.

[0152] A lower jet section 120 may be disposed at the lower part of the main chamber 100. The lower jet section 120 may extend from the upper jet section 110. The lower jet section 120 may jet the main solvent under high pressure. The lower jet section 120 may jet the main solvent toward the separation chamber 200. By jetting the main solvent under high pressure, the lower jet section 120 may discharge the main solvent deposited at the lower part of the main chamber 100 and the precipitated iodine to the outside of the main chamber 100.

[0153] Separation chamber 200 can be connected to main chamber 100.

[0154] For example, tray 160 may extend from main chamber 100 and connect to separation chamber 200.

[0155] The precipitated iodine and main solvent discharged from the main chamber 100 can flow into the separation chamber 200. For example, the precipitated iodine and main solvent can move along the tray 160.

[0156] For example, tray 160 can be mounted on main chamber 100 at a downward angle toward separation chamber 200. The main solvent remaining on tray 160 can move along the inclined surface of tray 160 due to gravity. Iodine precipitated on tray 160 is distributed in the main solvent and can move with it.

[0157] In separation chamber 200, the precipitated iodine and the main solvent can be separated.

[0158] For example, a filter may be installed in the separation chamber 200. The main solvent passes through the filter, while the precipitated iodine is filtered out, thereby separating the precipitated iodine from the main solvent. For example, the precipitated iodine and the main solvent can be separated by centrifugation.

[0159] For example, the main solvent can be separated from the precipitated iodine by heat treatment separation chamber 200.

[0160] For example, a first sensor 410 may be connected to the separation chamber 200. The first sensor can measure the temperature of the main solvent inside the separation chamber 200.

[0161] The control unit 500 can activate the heat treatment unit 700 to distill the main solvent contained in the separation chamber 200. By distilling the main solvent, the main solvent can be separated from the precipitated iodine.

[0162] The control unit 500 can activate the heat treatment unit 700 to heat the main solvent and precipitated iodine contained in the separation chamber 200. The precipitated iodine can be converted into liquid iodine. Utilizing the density difference between the main solvent and liquid iodine, the main solvent and liquid iodine can be separated. For example, the main solvent and liquid iodine can be separated by liquid-liquid separation.

[0163] Iodine separated from the main solvent in separation chamber 200 can be moved from separation chamber 200 to recovery chamber. Alternatively, iodine separated from the main solvent in separation chamber 200 can be recovered in separation chamber 200.

[0164] The main solvent, after being separated from iodine in separation chamber 200, can be moved through circulation pipeline section 300 and supplied to main chamber 100.

[0165] The main solvent can move from the main chamber 100 to the separation chamber 200 and be supplied back to the main chamber 100. For example, the main solvent can be circulated from the main chamber 100 through the separation chamber 200 and back to the main chamber 100.

[0166] The main solvent can be cooled and circulated by cooler 600.

[0167] A second sensor 420 may be connected to the circulation pipe section 300. For example, the second sensor 420 may be a temperature sensor. The second sensor 420 can measure the temperature of the main solvent moving through the circulation pipe section 300. The control unit 500 can receive the temperature of the main solvent moving through the circulation pipe section 300 from the second sensor 420. The control unit 500 can activate a cooler to cool the temperature of the main solvent to below 50°C. The cooler can reduce the temperature of the main solvent supplied to the main chamber 100 to below 50°C. The main solvent can be cooled to below 50°C and supplied to the main chamber 100.

[0168] A gaseous mixture containing gaseous iodine can be continuously supplied to the main chamber 100. The main solvent can be cooled and circulated back to the main chamber 100 via the circulation pipe section 300. The gaseous mixture can contact the circulating main solvent. The gaseous iodine can be cooled and precipitated upon contact with the main solvent. The precipitated iodine is separated from the main solvent in the separation chamber 200, thereby allowing for continuous recovery of iodine.

[0169] Figure 7 and Figure 8 This is a flowchart illustrating an iodine recovery method according to an embodiment of the present disclosure. Hereinafter, reference will be made to... Figure 7 and Figure 8 The iodine recovery method according to the exemplary embodiments will be described. Descriptions that are repeated in the description of the iodine recovery apparatus according to the exemplary embodiments will be omitted.

[0170] An iodine recovery method according to an exemplary embodiment may include a spraying step S100, an inflow step S200, a precipitation step S300, and a separation step S400.

[0171] In the spraying step S100, the upper spraying part 110 installed on the upper part of the main chamber 100 can spray the main solvent. The main solvent can be sprayed from the upper part of the main chamber 100 downwards.

[0172] In the inflow step S200, gaseous iodine can flow into the main chamber 100. A gas mixture containing gaseous iodine can flow into the main chamber 100 through the inflow pipe 130. The inflow pipe 130 can be connected to the main chamber 100 at a position lower than the upper injection section 110. The inflow pipe 130 can be located approximately lower than the center of the main chamber 100 along its length.

[0173] A dispersion plate 140 may be installed inside the main chamber 100. The dispersion plate 140 may be installed above the inflow pipe 130. The gas mixture flowing into the main chamber 100 through the inflow pipe 130 can be dispersed inside the main chamber 100 by passing through the dispersion plate 140.

[0174] In the precipitation step S300, the gaseous mixture containing iodine may be contacted with the main solvent. The gaseous iodine may be cooled and precipitated upon contact with the main solvent. For example, the temperature of the main solvent dispersed inside the main chamber 100 may be below 50°C. The temperature of the gaseous mixture flowing into the main chamber 100 through the inflow pipe 130 may be between 150°C and 250°C. The high-temperature gaseous iodine may be cooled upon contact with the low-temperature main solvent. The gaseous iodine may precipitate in the form of solid iodine.

[0175] The precipitated iodine and main solvent can be discharged from the main chamber 100 and flow into the separation chamber 200.

[0176] The precipitated iodine and main solvent can move along a tray 160 installed in the main chamber 100. The tray 160 can be installed inside the main chamber 100 at an angle downward toward the separation chamber 200.

[0177] In separation step S400, the precipitated iodine and main solvent that have moved into separation chamber 200 can be separated. For example, as described above, a filter may be installed in separation chamber 200. Alternatively, the precipitated iodine and main solvent can be separated by centrifugation. Alternatively, the precipitated iodine and main solvent can be separated by heat treatment of separation chamber 200 or main solvent by heat treatment section 700. Since the method for separating the precipitated iodine and main solvent has been described above, detailed description is omitted.

[0178] Reference Figure 8 The iodine recovery method according to the exemplary embodiments of the present disclosure may further include a recovery step S500 and a recycling step S600 after the separation step S400.

[0179] In the recovery step S500, iodine that has been separated from the main solvent in the separation chamber 200 can be recovered. For example, iodine remaining in the separation chamber 200 after separation from the main solvent can be recovered. Alternatively, the iodine separated from the main solvent can be moved to the recovery chamber and recovered.

[0180] For example, liquid iodine separated from the main solvent can be recovered. Iodine contained in separation chamber 200 can be recovered. Alternatively, the iodine can be moved to a recovery chamber and recovered there.

[0181] In the circulation step S600, the main solvent, after being separated from the precipitated iodine in the separation step S400, can be supplied to the main chamber 100. The circulation pipeline 300 can connect the main chamber 100 and the separation chamber 200. The main solvent can be moved from the separation chamber 200 to the main chamber 100 for circulation through the circulation pipeline 300.

[0182] As described above, a cooler 600 may be connected to the circulation pipe section 300. The main solvent discharged from the separation chamber 200 can be cooled by the cooler 600 and supplied to the main chamber 100.

[0183] While the preferred embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto. Various modifications and improvements made by those skilled in the art using the basic concepts of the present invention as defined in the appended claims also fall within the scope of the present invention.

Claims

1. An iodine recovery device, comprising: The main chamber is used to allow gaseous iodine to come into contact with the main solvent, where it is cooled and precipitated. An upper spray section is disposed at the upper part of the main chamber and has a through spray hole to allow the main solvent to be sprayed from the upper part to the lower part. An inflow pipe is disposed below the upper injection section and connected to the main chamber to allow the gaseous iodine to flow into the interior of the main chamber; as well as The separation chamber contains iodine precipitated in the main chamber and the main solvent flowing into it, and the precipitated iodine and the main solvent are separated in the separation chamber.

2. The iodine recovery device according to claim 1, wherein, Also includes: A dispersion plate, installed inside the main chamber, is used to disperse the gaseous iodine.

3. The iodine recovery device according to claim 1, wherein, Also includes: At least one tray is installed below the upper spray section to guide the movement of the main solvent and the precipitated iodine.

4. The iodine recovery device according to claim 3, wherein: The at least one tray is tilted downward toward the separation chamber.

5. The iodine recovery device according to claim 3, wherein: The at least one tray is provided with multiple trays along the height direction of the main chamber.

6. The iodine recovery device according to claim 5, wherein: Multiple trays are respectively connected to the separation chamber, and the main solvent and the precipitated iodine on the multiple trays move to the separation chamber.

7. The iodine recovery device according to claim 3, wherein: The at least one tray has a through-hole through which the gaseous iodine or the precipitated iodine can pass.

8. The iodine recovery device according to claim 3, wherein: The at least one tray is coated with any one of polytetrafluoroethylene film, polyethylene terephthalate film, and tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer film.

9. The iodine recovery apparatus according to any one of claims 1 to 8, wherein: The precipitated iodine separates from the main solvent in the separation chamber and forms a layer.

10. The iodine recovery apparatus according to any one of claims 1 to 8, wherein: The separation chamber is equipped with a filter, through which the main solvent passes and the precipitated iodine is filtered.

11. The iodine recovery apparatus according to any one of claims 1 to 8, wherein, include: The heat treatment section separates the precipitated iodine and the main solvent by heating in the separation chamber.

12. The iodine recovery device according to claim 11, wherein: The heat treatment section distills the main solvent in the separation chamber to separate it from the precipitated iodine.

13. The iodine recovery device according to claim 11, wherein: The heat treatment section converts the precipitated iodine into liquid iodine by heating the main solvent and the precipitated iodine in the separation chamber. The separation chamber also includes: A liquid-liquid separation device is configured to receive the supplied main solvent and the liquid iodine, and to perform liquid-liquid separation on the main solvent and the liquid iodine to recover the liquid iodine.

14. The iodine recovery apparatus according to any one of claims 1 to 8, wherein, Also includes: A circulation pipeline section, connected to the main chamber and the separation chamber, is used to supply the main solvent, after being separated from the precipitated iodine in the separation chamber, to the main chamber.

15. The iodine recovery device according to claim 14, wherein, Also includes: A cooler, connected to the circulation pipeline, is used to cool the main solvent supplied to the main chamber.

16. The iodine recovery apparatus according to any one of claims 1 to 8, wherein, Also includes: A lower injection section extends from the upper injection section and is disposed in the lower part of the main chamber. The lower spray section sprays the main solvent into the separation chamber.

17. A method for iodine recovery, comprising: The step of spraying the main solvent downward from the upper spray section located at the top of the main chamber; The step of gaseous iodine flowing into the main chamber; In the main chamber, the gaseous iodine is cooled and precipitated upon contact with the main solvent; The step of separating the main solvent from the precipitated iodine.

18. The iodine recovery method according to claim 17, wherein, The main room includes: A tray is configured to guide the movement of the main solvent and the precipitated iodine.

19. The iodine recovery method according to claim 17 or 18, wherein: Also includes: The step of supplying the main solvent separated in the separation chamber to the main chamber.

20. The iodine recovery method according to claim 19, wherein: In the step of supplying the main solvent separated in the separation chamber to the main chamber, the main solvent is cooled before being supplied to the main chamber.

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