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 precipitated is reduced, thereby improving the iodine recovery rate. The iodine recovery apparatus according to an exemplary embodiment of the present disclosure can include a main chamber in which a main solvent is contained inside, and an inflow pipe connected to the main chamber for inflow of gaseous iodine into the main chamber, the main chamber being configured such that the gaseous iodine is cooled and precipitated in the form of solid iodine by contacting with the main solvent.

Description

Technical Field

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

[0002] Iodine is a high-value-added 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 cause problems such as 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 further aggravated when solid iodine accumulates to a certain thickness, thus limiting the continuous operation of the process. 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 containing a main solvent; and an inflow pipe connected to the main chamber for supplying gaseous iodine into the main chamber, the main chamber being configured such that the gaseous iodine comes into contact with the main solvent and is cooled and precipitated as solid iodine.

[0009] In an exemplary embodiment, a separation chamber may also be included, wherein the solid iodine and the main solvent flow from the main chamber into the separation chamber, and the solid iodine and the main solvent are separated in the separation chamber.

[0010] In an exemplary embodiment, a circulation pipeline may also be included, which supplies the main solvent separated in the separation chamber to the main chamber.

[0011] In an exemplary embodiment, a cooler may also be included, connected to the circulation pipe, for cooling the main solvent supplied from the separation chamber to the main chamber.

[0012] In an exemplary embodiment, the cooler can cool the temperature of the main solvent supplied to the main chamber to below 50°C.

[0013] In an exemplary embodiment, the separation chamber may include a filter configured to allow the main solvent flowing into the separation chamber to pass through, thereby filtering the solid iodine.

[0014] In an exemplary embodiment, the end portion of the inflow pipe may be located inside the main chamber.

[0015] In an exemplary embodiment, the inflow pipe, partially disposed inside the main chamber, includes a gas outlet for discharging a gas mixture containing gaseous iodine.

[0016] In an exemplary embodiment, a plurality of gas discharge holes may be formed on the inflow pipe.

[0017] In an exemplary embodiment, the spacing between the plurality of gas discharge holes may be different from each other.

[0018] In an exemplary embodiment, the closer to the end of the inflow pipe, the narrower the spacing between the plurality of gas discharge holes may be.

[0019] In an exemplary embodiment, the inflow pipe may include a bubble generating device for bubbling the gas mixture containing gaseous iodine flowing into the main chamber.

[0020] In an exemplary embodiment, the temperature of the gas mixture containing gaseous iodine flowing into the inflow pipe may be from 150°C to 250°C.

[0021] In an exemplary embodiment, the main solvent flowing into the separation chamber and the precipitated solid iodine may be heated in the separation chamber to separate the main solvent and the solid iodine.

[0022] In an exemplary embodiment, the separation chamber may be configured to distill the main solvent flowing into the separation chamber by heating the main solvent and the solid iodine.

[0023] In an exemplary embodiment, the separation chamber may be configured to convert the solid iodine into liquid iodine by heating the main solvent and the solid iodine, and the separation chamber may be configured to recover the liquid iodine by performing liquid-liquid separation on the main solvent and the liquid iodine flowing into the separation chamber.

[0024] An iodine recovery method according to an exemplary embodiment of the present disclosure may include the steps of: flowing gaseous iodine into a main chamber containing a main solvent, contacting the gaseous iodine with the main solvent to cool it and precipitate it in the form of solid iodine.

[0025] In an exemplary embodiment, the method may further include: allowing the solid iodine and the main solvent discharged from the main chamber to flow into a separation chamber, and separating the main solvent from the solid iodine in the separation chamber.

[0026] In an exemplary embodiment, the gas mixture containing the gaseous iodine may be bubbled into the main chamber.

[0027] In an exemplary embodiment, the method may further include: after separating the solid iodine from the main solvent, cooling the main solvent and supplying it to the main chamber.

[0028] Technical effect

[0029] According to one embodiment of this disclosure, the gas mixture is contacted with a primary solvent at a low temperature, thus allowing gaseous iodine contained in the gas mixture to precipitate. Therefore, the amount of iodine discharged without precipitation is reduced, thereby improving iodine recovery.

[0030] Furthermore, according to one embodiment of this disclosure, liquid or solid iodine is discharged together with the main solvent, thus preventing its accumulation inside the main chamber. Therefore, continuous processes are possible, and maintenance is convenient. Additionally, the inflow pipes for the gas mixture will not become clogged, 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 exemplary embodiments of the present disclosure.

[0032] Figure 2 This is a block diagram illustrating the connection relationships of the constituent elements constituting an iodine recovery apparatus according to an exemplary embodiment of the present disclosure.

[0033] Figure 3 This is a flowchart illustrating the operating sequence of the various components of an iodine recovery apparatus according to an exemplary embodiment of the present disclosure.

[0034] Figure 4 This is a flowchart illustrating an iodine recovery method according to an exemplary embodiment of the present disclosure.

[0035] Figure 5 It is shown Figure 4 The flowchart shown illustrates the precipitation steps.

[0036] Figure 6 This is a flowchart illustrating an iodine recovery method according to an exemplary embodiment of the present disclosure. Detailed Implementation

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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 specifically stated otherwise, they imply that the corresponding constituent elements may be included, and therefore should be interpreted as potentially including other constituent elements rather than excluding them.

[0042] 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.

[0043] When a specific constituent element is described as being "connected" or "combined" to another constituent element, it should be understood that although the constituent element may be directly connected or combined to the other constituent element, the constituent element and the other constituent element may also be "connected" or "combined" with other constituent elements.

[0044] 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."

[0045] 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.

[0046] 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.

[0047] Reference Figures 1 to 3 An iodine recovery apparatus according to an exemplary embodiment of the present disclosure may include a main chamber 100 and a separation chamber 200.

[0048] The main chamber 100 can contain the main solvent.

[0049] The primary solvent can be a liquid phase substance.

[0050] 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.

[0051] The gas mixture may contain hydrogen halides such as hydrogen fluoride (HF) or hydrogen iodide (HI). When the main solvent is a polar solvent, 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.

[0052] 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.

[0053] For example, the primary solvent can be a solution with a boiling point below 100°C. Although details will be described below, in cases where the primary solvent is distilled to recover solid iodine, high-temperature energy may be required during the distillation process if the primary solvent has a high boiling point.

[0054] The main chamber 100 may be equipped with an inflow conduit 110 for the inflow of gaseous iodine. Gaseous iodine may flow into the main chamber 100 through the inflow conduit 110. Alternatively, a gaseous mixture containing gaseous iodine may flow into the main chamber 100 through the inflow conduit 110.

[0055] The following description describes the flow of a gaseous mixture containing gaseous iodine into the main chamber 100. However, it is obvious that only gaseous iodine, rather than the gaseous mixture, may flow in.

[0056] With the height of the main chamber 100 as a reference, the inflow pipe 110 can be arranged at a position lower than the center of the main chamber 100. For example, the inflow pipe 110 can be arranged below the liquid level of the main solvent contained in the main chamber 100. For example, the end of the inflow pipe 110 can be immersed in the main solvent.

[0057] The gas mixture can move through the inflow pipe 110 and flow into the interior of the main chamber 100.

[0058] For example, the gas mixture could be reactor effluent.

[0059] For example, a gas mixture may contain gaseous iodine and non-condensable gases.

[0060] For example, non-condensable gases may include halogenated hydrocarbons. The boiling points of non-condensable gases, excluding iodine vapor, can be below 50°C.

[0061] For example, if the boiling point of a non-condensable gas is above 50°C, the non-condensable gas may dissolve in a low-temperature solvent or act as an impurity, thereby reducing the iodine recovery rate. For example, if a non-condensable gas is liquefied or sublimated, it may be difficult to separate it from the solid iodine that is to be recovered.

[0062] 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.

[0063] The temperature of the gas mixture flowing into the main chamber 100 through the inflow pipe 110 can be between 150°C and 250°C.

[0064] The gas mixture can be heated or cooled before flowing into the inlet pipe 110. Alternatively, the temperature of the gas mixture can be regulated by heating or cooling the inlet pipe 110.

[0065] 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.

[0066] The gas mixture flows into the main chamber 100 through inlet pipe 110, thereby coming into contact with the main solvent contained within the main chamber 100. For example, the end of inlet pipe 110 may be immersed in the main solvent. The gas mixture may be directly distributed into the main solvent and come into contact with it.

[0067] For example, the temperature of the main solvent can be below 50°C.

[0068] 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 can precipitate as solid iodine.

[0069] The end of the inflow pipe 110 may be located inside the main chamber 100. For example, the end of the inflow pipe 110 may be located approximately at the center of the main chamber 100 along its length. The length of the main chamber 100, if the main chamber 100 is cylindrical, may be a direction parallel to its diameter. The gas mixture flowing into the main chamber 100 through the inflow pipe 110 may be dispersed from the center of the main chamber 100.

[0070] When the gas mixture is dispersed from the center of the main chamber 100, it can flow into the main chamber 100 and come into contact with the main solvent. The gaseous iodine contained in the gas mixture comes into contact with the low-temperature main solvent and is cooled, thereby precipitating out as solid iodine.

[0071] In contrast, when the gas mixture is dispersed from the wall of the main chamber 100, solid iodine crystals precipitated by cooling can grow from the wall of the main chamber 100. In this case, the solid iodine may not precipitate as microparticles, but rather form crystals and grow on the wall of the main chamber 100. Therefore, the internal volume of the main chamber 100 may decrease. Alternatively, the precipitated solid iodine may become fixed on the wall of the main chamber 100, making it difficult to move to the separation chamber 200.

[0072] A gas discharge port 111 may be provided through the inflow pipe 110. The gas mixture can be discharged from the inflow pipe 110 to the main chamber 100 through the gas discharge port 111.

[0073] Multiple gas discharge holes 111 may be formed on the inflow pipe 110. For example, multiple gas discharge holes 111 may be formed along the length of the inflow pipe 110. Multiple gas discharge holes 111 may be formed along the circumference of the inflow pipe 110. Multiple gas discharge holes 111 may be formed along both the length and circumference of the inflow pipe 110.

[0074] The spacing between the multiple gas vent holes 111 can be different. By adjusting the spacing between the gas vent holes 111, the distribution of the gas mixture in the main solvent can be adjusted.

[0075] For example, the spacing between the gas discharge holes 111 can become narrower closer to the end of the inflow pipe 110. For example, the spacing between the gas discharge holes 111 can gradually narrow towards the center of the main chamber 100. Compared to the walls of the main chamber 100, a larger amount of gas mixture can be discharged in the central part.

[0076] The gaseous mixture flows into the main chamber 100 and comes into contact with the main solvent, where it is cooled. Gaseous iodine can precipitate as solid iodine. A large amount of the gaseous mixture is discharged from approximately the center of the main chamber 100, and the gaseous iodine does not grow into crystals on the walls of the main chamber 100, but instead precipitates as solid iodine particles.

[0077] A bubble generator (not shown) may be installed on the inflow pipe 110. In this case, the gas mixture can flow into the main chamber 100 in the form of bubbles.

[0078] When the gas mixture flows in as bubbles, the contact area with the main solvent increases, thereby improving the iodine precipitation effect. Because the bubbles rise or disperse slowly within the main solvent, the contact time between the gas mixture and the main solvent can be increased. This shortens the time required for iodine precipitation.

[0079] For example, a vibrator or sonicator is connected to the bubble generator, thereby allowing adjustment of the bubble size of the gas mixture flowing in through the inflow pipe 110.

[0080] The bubble size of the gas mixture can be adjusted so that the average bubble diameter is less than 1 mm. For example, the diameter of the end of the vibrator or ultrasonic disruptor that discharges the gas mixture can be less than 1 mm.

[0081] The larger the bubbles flowing into the main chamber 100, the smaller the surface area of ​​the gas mixture in contact with the main solvent may be relative to the amount of gas mixture. Therefore, if the bubbles are too large, iodine may not be cooled by the main solvent and precipitate out, but may remain as gaseous iodine or liquid iodine dissolved in the main solvent.

[0082] Furthermore, larger bubbles have greater buoyancy compared to smaller bubbles, so they may pass through the main solvent more quickly. Therefore, if the contact time between iodine and the main solvent is short, iodine may not precipitate.

[0083] For example, when the bubble size is large, the amount of iodine carried over may increase.

[0084] The composition of the primary solvent may change when it comes into contact with a gas mixture.

[0085] For example, substances other than iodine contained in a gas mixture may undergo transformation upon contact with the main solvent. Other substances in the gas mixture, besides iodine, may liquefy or sublimate upon contact with the main solvent. Alternatively, some components of the gas mixture may dissolve in the main solvent. A portion of gaseous iodine may dissolve in the main solvent.

[0086] For example, the primary solvent can come into contact with a gas mixture, causing a transformation in its composition. Some components of the primary solvent may even vaporize.

[0087] The separation chamber 200 can be connected to the main chamber 100.

[0088] The iodine precipitated in the main chamber 100 can be discharged from the main chamber 100 together with the main solvent and move to the separation chamber 200.

[0089] The separation chamber 200 can be located below the main chamber 100. The precipitated iodine and main solvent can move to the separation chamber 200 by gravity.

[0090] In separation chamber 200, the iodine precipitated in main chamber 100 can be separated from the main solvent.

[0091] For example, a filter (not shown) may be installed in separation chamber 200. Except for the precipitated iodine, the main solvent flowing into separation chamber 200 passes through the filter, and the precipitated iodine can be filtered out. The precipitated iodine can be separated from the main solvent through the filter.

[0092] For example, the filter can be installed at a downward angle inside the separation chamber 200. The separated iodine moves under the influence of gravity through the angle of the filter, thus allowing it to be easily recovered within the separation chamber 200.

[0093] For example, in separation chamber 200, the precipitated iodine and the main solvent are separated by centrifugation, thereby separating the precipitated iodine and the main solvent. The main solvent flowing into separation chamber 200 and the precipitated iodine can be separated by centrifugation in separation chamber 200. Therefore, the main solvent flowing into separation chamber 200 and the precipitated iodine can be separated.

[0094] For example, iodine and the main solvent can be separated by heat treatment in separation chamber 200. The main solvent flowing into separation chamber 200 and the precipitated iodine can be heat treated in separation chamber 200. Therefore, the main solvent flowing into separation chamber 200 and the precipitated iodine can be separated.

[0095] For example, a 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.

[0096] After the temperature of the main solvent and iodine is measured by the first sensor 410, the control unit 500 can control the main solvent and iodine flowing into the separation chamber 200 to be heated.

[0097] For example, the control unit 500 can operate 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.

[0098] 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. The heat treatment unit 700 can heat and distill the main solvent flowing into the separation chamber 200. As mentioned above, the boiling point of the main solvent can be below 100°C. Solid iodine can remain solid at 100°C under pressures of 1 to 3 atmospheres.

[0099] 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. Thus, the iodine precipitated by distilling the main solvent can be separated from the main solvent. The main solvent flowing into the separation chamber 200 can be distilled within the separation chamber 200. Therefore, the main solvent flowing into the separation chamber 200 and the main solvent in the precipitated iodine are distilled, thereby separating the precipitated iodine.

[0100] 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 and iodine flowing into the separation chamber 200. In this case, the precipitated iodine can be converted into liquid iodine.

[0101] Utilizing the density difference between the main solvent and liquid iodine, liquid-liquid separation is performed on the main solvent and iodine flowing into separation chamber 200, thereby separating the main solvent and liquid iodine. The density of liquid iodine can 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 can be located at the bottom, and the main solvent at the top. Because liquid iodine does not mix with the main solvent, liquid iodine can be separated and recovered through liquid-liquid separation.

[0102] The iodine separated in separation chamber 200 can be moved to recovery chamber (not shown) for recovery.

[0103] The recovery chamber can be connected to the separation chamber 200. Iodine that has been separated from the main solvent in the separation chamber 200 can be recovered in the recovery chamber.

[0104] As mentioned earlier, if a filter is installed in the separation chamber 200, the precipitated iodine remaining on the filter can be moved to the recovery chamber. For example, if the filter is installed at an angle downward toward the recovery chamber, the precipitated iodine can be recovered by gravity moving from the separation chamber 200 to the recovery chamber.

[0105] Iodine can be recovered in separation chamber 200 instead of being moved to the recovery chamber.

[0106] For example, if the main solvent is distilled in the separation chamber 200, only solid iodine remains in the separation chamber 200, thus solid iodine can be recovered in the separation chamber 200.

[0107] The iodine recovery apparatus according to an exemplary embodiment may also include a circulation pipeline 300 and a cooler 600.

[0108] The circulation pipe 300 can connect the separation chamber 200 and the main chamber 100.

[0109] The main solvent that separates from iodine in separation chamber 200 can be moved to main chamber 100 via circulation pipeline 300.

[0110] 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 pipe 300.

[0111] A cooler 600 can be connected to the circulation pipe 300. The cooler 600 can cool the main solvent moving through the circulation pipe 300.

[0112] A second sensor 420 may be connected to the circulation pipe 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 300. The control unit 500 can receive the temperature of the main solvent from the second sensor 420 and control the operation of the cooler 600.

[0113] The main solvent supplied to the main chamber 100 via the circulation pipe 300 can be cooled by a cooler before being supplied to the main chamber 100. The cooled main solvent can then contact gaseous iodine in the main chamber 100. Iodine can precipitate out through contact with the main solvent.

[0114] For example, cooler 600 can reduce the temperature of the main solvent supplied to main chamber 100 to below 50°C. The operation of cooler 600 can be controlled by control unit 500. Control unit 500 can receive the temperature of the main solvent from second sensor 420 and control the operation of cooler 600 to cool the main solvent.

[0115] The temperature of the main solvent supplied to the main chamber 100 can be below 50°C.

[0116] This is 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).

[0117] A gas outlet 120 may be formed in the upper part of the main chamber 100.

[0118] Gas mixtures may come into contact with the main solvent, causing some of their components to change. For example, iodine contained in a gas mixture may come into contact with the main solvent and dissolve in it. Iodine may also come into contact with the main solvent and be liquefied or precipitated. Other components in a gas mixture besides iodine may also come into contact with the main solvent and undergo dissolution, liquefaction, or sublimation.

[0119] A portion of the main solvent may also come into contact with the gas mixture and be vaporized.

[0120] Thus, after the gas mixture comes into contact with the main solvent, the main solvent and the 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 120 located at the top of the main chamber 100.

[0121] The following is for reference Figure 3 The iodine recovery process of an iodine recovery apparatus according to an embodiment of the present disclosure is described.

[0122] The main chamber 100 can contain the supplied main solvent. The temperature of the main solvent supplied to the main chamber 100 can be below 50°C.

[0123] An inflow pipe 110 may be installed on one side of the main chamber 100. A gaseous mixture containing gaseous iodine can flow into the main chamber 100 through the inflow pipe 110.

[0124] The inlet pipe 110 can be installed at a position lower than the liquid level of the main solvent. The gas mixture can flow into the main solvent.

[0125] 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 before flowing into the main chamber 100. For example, the gas mixture may be heated and flow into the inlet pipe 110. For example, the temperature of the gas mixture may be increased by heating the inlet pipe 110.

[0126] The high-temperature iodine flowing in through the inflow pipe 110 can be cooled and precipitated as a solid by contacting the low-temperature main solvent in the main chamber 100.

[0127] The precipitated iodine and main solvent can be discharged from the main chamber 100. The discharged iodine and main solvent can move to the separation chamber 200. For example, the separation chamber 200 can be located in the lower part of the main chamber 100. Iodine and main solvent can move from the main chamber 100 to the separation chamber 200 by gravity.

[0128] In separation chamber 200, iodine and the main solvent can be separated.

[0129] For example, a filter may be installed in the separation chamber 200. The main solvent passes through the filter, and the precipitated iodine is filtered out, thereby separating the iodine from the main solvent. For example, the iodine and the main solvent can be separated by centrifugation.

[0130] For example, the main solvent can be separated from iodine by heat treatment of the separation chamber 200.

[0131] For example, the separation chamber 200 may be connected to a first sensor 410. The first sensor can measure the temperature of the main solvent inside the separation chamber 200.

[0132] The control unit 500 can operate the heat treatment unit 700 to distill the main solvent contained in the separation chamber 200. The main solvent can be separated from iodine by distillation.

[0133] The control unit 500 can operate the heat treatment unit 700 to heat the main solvent and iodine contained in the separation chamber 200. The precipitated iodine can be converted into liquid iodine. The density difference between the main solvent and liquid iodine can be used to separate the main solvent and iodine. For example, the main solvent and iodine can be separated by liquid-liquid separation.

[0134] 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.

[0135] The main solvent that separates from iodine in separation chamber 200 can be moved through circulation pipe 300 and supplied to main chamber 100.

[0136] The main solvent can be moved from the main chamber 100 to the separation chamber 200 and then supplied back to the main chamber 100. For example, the main solvent can be recycled from the main chamber 100 through the separation chamber 200 back to the main chamber 100.

[0137] The main solvent can be cooled and circulated by cooler 600.

[0138] A second sensor 420 may be connected to the circulation pipe 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 300. The control unit 500 can receive the temperature of the main solvent moving through the circulation pipe 300 from the second sensor 420. The control unit 500 can operate a cooler to cool the main solvent to a temperature 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.

[0139] A gaseous mixture containing gaseous iodine can be continuously supplied to the main chamber 100. The main solvent, after being cooled, can be circulated back to the main chamber 100 via circulation pipe 300. The gaseous mixture can contact the circulating main solvent. The gaseous iodine is cooled upon contact with the main solvent, thereby precipitating out. The precipitated iodine is separated from the main solvent in separation chamber 200, thus allowing for continuous iodine recovery.

[0140] The following is for reference Figures 4 to 6 The iodine recovery method according to the exemplary embodiment is described below. Descriptions that are repeated in the description of the iodine recovery apparatus according to the exemplary embodiment are omitted.

[0141] An iodine recovery method according to an exemplary embodiment may include a precipitation step S100 and a separation step S200.

[0142] In the precipitation step S100, the main chamber 100 may contain the main solvent (S110). A gas mixture containing gaseous iodine may flow into the main chamber 100 (S120). In the main chamber 100, the iodine comes into contact with the main solvent and is cooled, thereby precipitating out (S130). Detailed explanations are omitted here as they have already been described above.

[0143] As previously described, in the precipitation step S100, the gas mixture can be bubbled into the main chamber 100.

[0144] After iodine is precipitated in precipitation step S100, iodine and the main solvent can move from the main chamber 100 to the separation chamber 200.

[0145] In separation step S200, the iodine and main solvent that have moved into the separation chamber 200 can be separated. For example, as described above, a filter may be installed in the separation chamber 200. Alternatively, the iodine and main solvent can be separated by centrifugation. Alternatively, the heat treatment unit 700 may heat-treat the separation chamber 200 or the main solvent to separate the iodine and main solvent. Since the method for separating iodine and the main solvent has been described above, detailed explanation is omitted.

[0146] Reference Figure 6 The iodine recovery method according to the exemplary embodiments of the present disclosure may further include a recovery step S300 and a recycling step S400 after the separation step S200.

[0147] In the recovery step S300, iodine that has been separated from the main solvent in the separation chamber 200 can be recovered. For example, iodine that remains in the separation chamber 200 after being separated from the main solvent can be recovered. Alternatively, the iodine separated from the main solvent can be moved to the recovery chamber for recovery.

[0148] For example, liquid iodine separated from the main solvent can be recovered. Iodine contained in separation chamber 200 can be recovered. Alternatively, iodine can be recovered in the recovery chamber by moving it to a recovery chamber.

[0149] In the circulation step S400, the main solvent that was separated from iodine in the separation step S200 can be supplied to the main chamber 100. The circulation pipe 300 can connect the main chamber 100 and the separation chamber 200. The main solvent can be circulated from the separation chamber 200 to the main chamber 100 through the circulation pipe 300.

[0150] As previously mentioned, a cooler 600 may be connected to the circulation pipe 300. The main solvent discharged from the separation chamber 200 can be cooled by the cooler 600 and supplied to the main chamber 100.

[0151] The preferred embodiments of the present invention have been described in detail above, but 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 contains the main solvent. as well as An inflow pipe, connected to the main chamber, supplies gaseous iodine into the main chamber. In this configuration, the main chamber is arranged such that the gaseous iodine comes into contact with the main solvent and is cooled, precipitating out as solid iodine.

2. The iodine recovery device according to claim 1, wherein, Also includes: In the separation chamber, the solid iodine and the main solvent flow from the main chamber into the separation chamber, and the solid iodine and the main solvent are separated in the separation chamber.

3. The iodine recovery device according to claim 2, wherein, Also includes: A circulation pipeline supplies the main solvent separated in the separation chamber back to the main chamber.

4. The iodine recovery device according to claim 3, wherein, Also includes: A cooler, connected to the circulation pipe, is used to cool the main solvent supplied from the separation chamber to the main chamber.

5. The iodine recovery device according to claim 4, wherein: The cooler cools the temperature of the main solvent supplied to the main chamber to below 50°C.

6. The iodine recovery device according to claim 2, wherein: The separation chamber includes a filter configured to allow the main solvent flowing into the separation chamber to pass through, filtering the solid iodine.

7. The iodine recovery apparatus according to any one of claims 1 to 6, wherein: The end of the inflow pipe is located inside the main chamber.

8. The iodine recovery device according to claim 7, wherein: The inflow pipe, which is partially disposed inside the main chamber, includes a gas outlet for discharging a gas mixture containing gaseous iodine.

9. The iodine recovery device according to claim 8, wherein: The inflow pipe has multiple gas discharge holes.

10. The iodine recovery device according to claim 9, wherein: The spacing between the multiple gas discharge holes is different from each other.

11. The iodine recovery device according to claim 9, wherein: The closer to the end of the inflow pipe, the narrower the spacing between the plurality of gas discharge holes.

12. The iodine recovery device according to claim 8, wherein: The inflow pipe includes a bubble generating device for bubbling the gas mixture containing gaseous iodine flowing into the main chamber.

13. The iodine recovery apparatus according to any one of claims 1 to 6, wherein: The temperature of the gaseous mixture containing gaseous iodine flowing into the inflow pipe is between 150°C and 250°C.

14. The iodine recovery apparatus according to any one of claims 2 to 5, wherein: The main solvent flowing into the separation chamber and the precipitated solid iodine are heated in the separation chamber to separate the main solvent and the solid iodine.

15. The iodine recovery device according to claim 14, wherein: The separation chamber is configured to distill the main solvent flowing into the separation chamber by heating the main solvent and the solid iodine.

16. The iodine recovery apparatus according to claim 14, wherein: The separation chamber is configured to convert the solid iodine into liquid iodine by heating the main solvent and the solid iodine. The separation chamber is configured to recover the liquid iodine by performing liquid-liquid separation on the main solvent and the liquid iodine flowing into the separation chamber.

17. A method for iodine recovery, comprising: The step involves flowing gaseous iodine into a main chamber containing a main solvent, allowing the gaseous iodine to come into contact with the main solvent and be cooled, thus precipitating out as solid iodine.

18. The iodine recovery method according to claim 17, wherein, Also includes: The solid iodine and the main solvent discharged from the main chamber flow into the separation chamber, where the main solvent and the solid iodine are separated.

19. The iodine recovery method according to claim 18, wherein: A gaseous mixture containing the gaseous iodine bubbled into the main chamber.

20. The iodine recovery method according to claim 18 or 19, wherein, Also includes: The steps include separating the solid iodine from the main solvent, cooling the main solvent, and supplying it to the main chamber.

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