A device for removing impurities from industrial crude iodine

Abstract

This utility model discloses an industrial crude iodine impurity removal device, relating to the field of crude iodine purification. The industrial crude iodine impurity removal device includes a heating vessel and a discharge pipe, fixedly mounted on the heating vessel via a bracket. The inlet of the discharge pipe and the outlet of the heating vessel are connected via an insulated conveying pipe. The lower end of the discharge pipe has a discharge port for discharging refined iodine, and the upper end of the discharge pipe is fixedly connected to an exhaust pipe for discharging the volatile gases of low-boiling-point impurities. This utility model, by precisely controlling the initial heating temperature and utilizing the temperature difference, causes low-boiling-point impurities to volatilize before iodine, and are discharged through the discharge pipe, thus initially separating from iodine. This effectively solves the problem of low-boiling-point impurity contamination in the traditional sublimation method, significantly improving the iodine purification and impurity removal effect and yield, meeting the industrial demand for high-purity iodine production.

Description

Technical Field

[0001] This utility model belongs to the field of crude iodine purification technology, specifically, it relates to an industrial crude iodine impurity removal device. Background Technology

[0002] In industrial production, crude iodine purification is a key step in obtaining high-purity iodine products. Iodine, as an important industrial raw material, is widely used in pharmaceuticals, chemicals, food, and other production processes. Its purity directly affects the quality of downstream products. Currently, the sublimation method is commonly used to remove impurities from industrial crude iodine. This method utilizes the characteristics of iodine's easy sublimation (around 113.5℃) and its ability to sublimate upon cooling. Crude iodine is heated to sublimate into a gaseous state, and then cooled to allow the gaseous iodine to condense into solid refined iodine, thus separating it from impurities. Traditional equipment generally includes a heating vessel, a conveying pipeline, and a condensation and collection component. The heating vessel is used to heat and sublimate the crude iodine, the conveying pipeline is responsible for transporting iodine vapor, and the condensation component collects the iodine vapor.

[0003] However, in the use of existing industrial crude iodine impurity removal devices based on sublimation, crude iodine often contains a small amount of low-boiling-point impurities (such as chlorine and bromine, with bromine having a boiling point of only 58.8°C). When the crude iodine is heated for sublimation, the heating temperature needs to reach the sublimation conditions of iodine, and the low-boiling-point impurities will sublimate along with the iodine. During the subsequent cooling and deposition process, these impurities cannot be effectively separated and will remain in the iodine product after deposition, resulting in poor purification and impurity removal effect, which is difficult to meet the requirements of high-purity iodine for high-end industrial production. In view of this, this utility model is proposed. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide an industrial crude iodine impurity removal device that can overcome or at least partially solve the above problems.

[0005] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by this utility model is as follows: an industrial crude iodine impurity removal device, including a heating vessel, and further including: a discharge pipe, which is fixedly installed on the heating vessel by a bracket; the air inlet of the discharge pipe and the air outlet of the heating vessel are connected to each other by a heat-insulating conveying pipe; the lower end of the discharge pipe is provided with a discharge port for discharging refined iodine, and the upper end of the discharge pipe is fixedly connected with an exhaust pipe for discharging low-boiling-point impurity volatile gases; a spiral heat exchange tube, which is embedded in the tube wall of the discharge pipe, and heats and condenses the gas by changing the temperature of the liquid flowing inside the spiral heat exchange tube.

[0006] Furthermore, the heating vessel includes a vessel body, a vessel cover, a feeding valve pipe, and a discharging valve pipe. The heating element of the heating vessel is disposed in the vessel body. The vessel cover is detachably installed on the vessel body by fastening bolts. The feeding valve pipe is fixedly connected to the upper end of one side of the vessel body. The discharging valve pipe is fixedly connected to the bottom of the vessel body. The bracket is fixedly connected to the vessel body. The gas outlet of the heating vessel is opened on the vessel cover.

[0007] Furthermore, a geared motor is fixedly connected to the lid of the vessel, and a first drive shaft is fixedly connected to the output end of the geared motor. Multiple rows of stirring rods are fixedly connected to the part of the first drive shaft located inside the vessel. A scraper is fixedly connected to the end of each row of stirring rods away from the first drive shaft, and the scraper slides against the inner wall of the vessel.

[0008] To facilitate the physical interception of minute high-boiling-point impurities mixed in iodine vapor, a filter plate is further fixedly connected inside the vessel body above the feed valve pipe, and the first drive shaft runs vertically through the filter plate.

[0009] To facilitate the purging of the filter disc, remove tiny impurities trapped on it, and prevent clogging, multiple air cylinders are further fixedly connected to the upper end of the filter disc on the first drive shaft at equal intervals. A piston rod with a piston is slidably connected inside each air cylinder. A tension spring is installed inside each air cylinder, with its two ends fixedly connected to the piston on the piston rod and the end of the air cylinder closest to the first drive shaft, respectively. A roller is rotatably connected to the end of the piston rod extending out of the air cylinder via a wheel seat. Multiple arc-shaped blocks that cooperate with the rollers are fixedly connected to the inner wall of the vessel at equal intervals. One-way valves are installed in the inlet and outlet ports of each air cylinder. A connecting air ring is fixedly connected to the first drive shaft between the air cylinder and the filter disc. Multiple jet pipes are fixedly connected to the connecting air ring at equal intervals. Multiple nozzles are connected to the lower end of each jet pipe at equal intervals. The inlet of each jet pipe is connected to the outlet of the adjacent air cylinder.

[0010] To ensure that the airflow pressure from all nozzles is consistent, a conical air passage is further provided inside the jet pipe, with the diameter of the conical air passage gradually decreasing from one end near the connecting air ring to the other end.

[0011] To facilitate extending the residence time of iodine vapor in the discharge pipe and allowing it more time to come into contact with the pipe wall and the low-temperature environment inside the pipe, the discharge pipe is further provided with spiral blades to ensure that the iodine vapor can be sufficiently cooled.

[0012] To facilitate the scraping off of iodine crystals adhering to the inner wall of the discharge pipe, the spiral blades are rotatably connected inside the discharge pipe, and a drive motor is fixedly connected to the upper end of the discharge pipe. The output end of the drive motor is fixedly connected to a second drive shaft for driving the spiral blades to rotate.

[0013] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art: By precisely controlling the first heating temperature, the present invention utilizes the temperature difference to make low boiling point impurities volatilize before iodine and be discharged through the discharge pipe, thus initially separating them from iodine. This effectively solves the problem of low boiling point impurities being mixed in by the traditional sublimation method, greatly improves the iodine purification and impurity removal effect and yield, and meets the industrial demand for high-purity iodine production.

[0014] Adding a low-boiling-point impurity pre-separation process before the iodine sublimation and deposition operation can effectively remove low-boiling-point and high-boiling-point impurities, effectively improving the purity of iodine. Compared with the traditional single sublimation method, this device can increase the removal rate of low-boiling-point impurities in crude iodine to more than 90%, and the final purity of refined iodine can reach about 99.5%.

[0015] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0016] In the attached diagram: Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the internal structure of the heating vessel of this utility model. Figure 1 ; Figure 3 This is a schematic diagram of the internal structure of the heating vessel of this utility model. Figure 2 ; Figure 4 This is a schematic diagram of the internal structure of the discharge pipe of this utility model; Figure 5 This is a cross-sectional schematic diagram of a portion of the structure of this utility model.

[0017] In the diagram: 1. Heating vessel; 101. Vessel body; 102. Vessel lid; 103. Feeding valve pipe; 104. Discharge valve pipe; 105. Gear motor; 106. First drive shaft; 107. Stirring rod; 108. Scraper; 109. Arc block; 2. Insulated conveying pipe; 3. Discharge pipe; 301. Support; 302. Spiral heat exchanger pipe; 303. Exhaust pipe; 304. Spiral blade; 305. Drive motor; 306. Second drive shaft; 4. Intercepting filter plate; 5. Air cylinder; 501. Piston rod; 502. Tension spring; 503. Roller; 504. Jet pipe; 505. Conical air passage; 506. Connecting air ring. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0019] Example: Reference Figure 1 , Figure 2 , Figure 4 An industrial crude iodine impurity removal device includes a heating vessel 1, and further includes: a discharge pipe 3, which is fixedly installed on the heating vessel 1 by a bracket 301; the air inlet of the discharge pipe 3 and the air outlet of the heating vessel 1 are connected to each other by a heat-insulating conveying pipe 2; the lower end of the discharge pipe 3 is provided with a discharge port for discharging refined iodine, and the upper end of the discharge pipe 3 is fixedly connected with an exhaust pipe 303 for discharging low-boiling-point impurity volatile gases; a spiral heat exchange tube 302, which is embedded in the tube wall of the discharge pipe 3, and heats and condenses the gas by changing the temperature of the liquid flowing inside the spiral heat exchange tube 302.

[0020] The heating vessel 1 includes a vessel body 101, a vessel cover 102, a feeding valve pipe 103, and a discharge valve pipe 104. The heating element of the heating vessel 1 is disposed in the vessel body 101. The vessel cover 102 is detachably installed on the vessel body 101 by fastening bolts. The feeding valve pipe 103 is fixedly connected to the upper end of one side of the vessel body 101. The discharge valve pipe 104 is fixedly connected to the bottom of the vessel body 101. The bracket 301 is fixedly connected to the vessel body 101. The air outlet of the heating vessel 1 is opened on the vessel cover 102.

[0021] A geared motor 105 is fixedly connected to the lid 102. A first drive shaft 106 is fixedly connected to the output end of the geared motor 105. Multiple rows of stirring rods 107 are fixedly connected to the part of the first drive shaft 106 located inside the vessel body 101. A scraper 108 is fixedly connected to the end of each row of stirring rods 107 away from the first drive shaft 106. The scraper 108 slides against the inner wall of the vessel body 101.

[0022] When using this device to purify and remove impurities from industrial crude iodine, first confirm that the body 101 and lid 102 of the heating vessel 1 are securely connected, that the moving parts such as the geared motor 105, stirring rod 107, and scraper 108 are not jammed, that the spiral heat exchange tube 302 and the heat-insulating conveying pipe 2 of the discharge pipe 3 are not blocked, and that the valves of the exhaust pipe 303, the feeding valve pipe 103, and the discharge valve pipe 104 are in normal condition.

[0023] Then, prepare in advance the high-temperature liquid (such as high-temperature heat transfer oil) and cooling liquid (such as cooling water) for the spiral heat exchanger tube 302, and prepare the industrial crude iodine raw material to be purified.

[0024] After the preliminary operations are completed, the heating vessel 1 is first heated, and at the same time, high-temperature liquid is introduced into the spiral heat exchange tube 302 to make the high-temperature liquid circulate in the spiral heat exchange tube 302 so that the temperature in the discharge tube 3 reaches the set value (this temperature needs to be determined in combination with the characteristics of low-boiling-point impurities and the melting point of iodine, in order to allow the low-boiling-point impurities to volatilize without causing excessive changes in iodine).

[0025] Then, crude iodine to be removed is added to the vessel body 101 of the heating vessel 1 through the feeding valve pipe 103, and the feeding valve pipe 103 is closed. Immediately afterwards, the reduction motor 105 is started, driving the first drive shaft 106 to rotate, which in turn causes the stirring rod 107 and scraper 108 to rotate. The stirring rod 107 stirs the crude iodine, allowing the crude iodine to be heated evenly. The scraper 108 rotates against the inner wall of the vessel body 101 to prevent the crude iodine from adhering to the inner wall. In this stage, the temperature of the first heating is controlled between the melting point of iodine and the boiling point of low-boiling-point impurities (e.g., for impurities containing bromine, the temperature is controlled above 58.8℃ (boiling point of bromine) and below 113.5℃ (melting point of iodine) so that the low-boiling-point impurities (such as bromine) volatilize into a gaseous state.

[0026] Low-boiling-point impurities in gaseous form enter the discharge pipe 3 through the outlet of the heating vessel 1 and the heat-insulated conveying pipe 2. Due to the high-temperature environment inside the discharge pipe 3 (maintained by the high-temperature liquid circulating inside the spiral heat exchanger 302), the gaseous impurities remain in a gaseous state and are discharged through the exhaust pipe 303, entering the subsequent purification system to achieve the initial separation of low-boiling-point impurities.

[0027] After the low-boiling-point impurities are removed, a cooler liquid with a lower temperature is introduced into the spiral heat exchanger tube 302 to lower the temperature inside the discharge tube 3, preparing for subsequent iodine sublimation. At the same time, the heating vessel 1 is heated a second time to make the temperature inside the vessel higher than the melting point of iodine (113.5℃), reaching the sublimation point of iodine (113.5℃-120℃). Then, the solid iodine will sublimate into gaseous iodine. After the gaseous iodine enters the discharge tube 3 through the heat-insulated conveying pipe 2, it encounters the cooler wall of the discharge tube 3 (due to the effect of the cooler liquid inside the spiral heat exchanger tube 302), and the gaseous iodine condenses into solid refined iodine, which slides down the inner wall of the discharge tube 3 and is discharged through the discharge port. The staff places a collection box under the discharge port in advance to collect the refined iodine after impurity removal.

[0028] By precisely controlling the initial heating temperature and utilizing the temperature difference, low-boiling-point impurities (such as chlorine and bromine) evaporate before iodine and are discharged through discharge pipe 3, thus initially separating them from iodine and significantly reducing the amount of impurities mixed in during subsequent iodine sublimation.

[0029] The remaining solids in the heating vessel 1 are iodine and high-boiling-point solid impurities (such as mud and salt). Since the boiling point of the high-boiling-point impurities is much higher than that of iodine, the high-boiling-point impurities remain in the heating vessel 1 during the secondary heating and iodine sublimation process. They can be periodically discharged through the discharge valve pipe 104 to achieve the separation of iodine and high-boiling-point impurities.

[0030] Adding a low-boiling-point impurity pre-separation process before the iodine sublimation and deposition operation can effectively remove low-boiling-point and high-boiling-point impurities, effectively improving the purity of iodine. Compared with the traditional single sublimation method, this device can increase the removal rate of low-boiling-point impurities in crude iodine to over 90%, and the final purity of refined iodine can reach about 99.5% (adjusted according to the initial impurity content of crude iodine).

[0031] The stirring rod 107 stirs and the scraper 108 prevents adhesion, which can make the crude iodine heat evenly and sublimate fully. The spiral heat exchange tube 302 can flexibly adjust the internal liquid temperature and realize the temperature control in the discharge pipe 3 to meet the temperature requirements of different stages (heat preservation when low boiling point impurities are discharged, and cooling when iodine sublimation), ensuring stable operation of each link. The stirring rod 107 and the scraper 108 work together to solve the problems of crude iodine adhering to the vessel wall and uneven heating during heating, improve heating efficiency and impurity removal effect, and reduce the frequency of equipment cleaning.

[0032] In summary, this industrial crude iodine impurity removal device effectively solves the problem of low-boiling-point impurities being mixed in by the traditional sublimation method through staged temperature control, significantly improving the iodine purification and impurity removal effect and yield, and meeting the industrial demand for high-purity iodine production.

[0033] Reference Figure 2 , Figure 3 , Figure 5 As shown, an intercepting filter plate 4 is fixedly connected inside the vessel body 101 above the feeding valve pipe 103. The first drive shaft 106 runs vertically through the intercepting filter plate 4. In the industrial crude iodine impurity removal device, by fixing the intercepting filter plate 4 inside the vessel body 101 above the feeding valve pipe 103, when crude iodine is heated and sublimates to produce iodine vapor, the vapor flows upward and passes through the intercepting filter plate 4. The filter plate can physically intercept the tiny high-boiling-point impurities mixed in the iodine vapor. These tiny impurities cannot continue to enter the subsequent condensation and collection stage with the iodine vapor due to their own weight or being blocked by the filter plate, thereby further improving the purity of the iodine vapor and providing a guarantee for obtaining high-purity refined iodine through subsequent sublimation. This further enhances the impurity removal effect of the device, making the entire crude iodine purification process more comprehensive and refined in terms of impurity removal, and helping to obtain a higher quality refined iodine product.

[0034] Multiple air cylinders 5 are fixedly connected in a circular pattern at equal intervals on the upper end of the intercepting filter disc 4 on the first drive shaft 106. A piston rod 501 with a piston is slidably connected inside each air cylinder 5. A tension spring 502 is installed inside each air cylinder 5, with both ends of the tension spring 502 fixedly connected to the piston on the piston rod 501 and the end of the air cylinder 5 closest to the first drive shaft 106, respectively. A roller 503 is rotatably connected to the end of the piston rod 501 extending out of the air cylinder 5 via a wheel seat. The inner wall of the vessel body 101... Multiple arc-shaped blocks 109, which cooperate with rollers 503, are fixedly connected in a circumferentially equidistant manner. One-way valves are installed in the inlet and outlet ports of the air cylinder 5. A connecting air ring 506 is fixedly connected to the first drive shaft 106 between the air cylinder 5 and the intercepting filter disc 4. Multiple jet pipes 504 are fixedly connected in a circumferentially equidistant manner on the connecting air ring 506. Multiple nozzles are equidistantly connected to the lower end of each jet pipe 504. The inlet of each jet pipe 504 is connected to the outlet of the adjacent air cylinder 5. When the first drive shaft 106 rotates, the air cylinder 5 rotates synchronously with it. The roller 503 at the end of the piston rod 501 alternately contacts and squeezes the arc-shaped block 109 on the inner wall of the vessel body 101, causing the piston rod 501 to slide back and forth inside the air cylinder 5. When it contacts the arc-shaped block 109, the piston rod 501 compresses the tension spring 502 and forces the gas in the air cylinder 5 into the connecting air ring 506 through the one-way valve. When it disengages from the arc-shaped block 109, the tension spring 502 resets, and the air cylinder 5 draws in external gas through the one-way valve. The gas in the connecting air ring 506 is ejected from the nozzle through the jet pipe 504, continuously purging the surface of the intercepting filter plate 4. This process can promptly remove the tiny impurities intercepted on the filter plate, effectively preventing the intercepting filter plate 4 from clogging, ensuring that iodine vapor flows smoothly through the filter plate into subsequent stages, avoiding problems such as increased pressure inside the vessel and obstructed iodine vapor flow caused by filter plate clogging, ensuring the continuity and efficiency of the impurity removal process, and further improving the stable operation capability of the device.

[0035] It should be noted that the air cylinder 5, piston rod 501, tension spring 502, roller 503, and jet pipe 504 are all made of high-temperature resistant materials, thus ensuring their stability in use within the heating vessel 1.

[0036] A conical air passage 505 is provided inside the jet pipe 504. The diameter of the conical air passage 505 gradually decreases from one end near the connecting air ring 506 to the other end. Through the gradient change of the cross-sectional area of ​​the air passage, a uniform distribution of airflow pressure is achieved. When the gas enters the jet pipe 504, the conical air passage 505 can stabilize and guide the airflow, avoiding uneven pressure loss due to airflow flowing in the pipe. This ensures that the gas can be delivered to each nozzle at the lower end of the jet pipe 504 at a similar pressure, ultimately making the airflow pressure from all nozzles consistent. In this way, the purging force on the intercepting filter disc 4 is more uniform. It can not only thoroughly remove tiny impurities in all areas of the filter disc and prevent blockage caused by incomplete purging, but also avoid the problem of damage to the filter disc due to excessive pressure from some nozzles or ineffective cleaning due to insufficient pressure from some nozzles. This further ensures the smooth flow and service life of the intercepting filter disc 4, and provides a reliable guarantee for the stable passage of iodine vapor.

[0037] Reference Figure 1 , Figure 4 As shown, the discharge pipe 3 is equipped with spiral blades 304 to ensure that iodine vapor can be sufficiently cooled. When iodine vapor enters the discharge pipe 3 from the insulated conveying pipe 2, the spiral blades 304 guide the airflow along the spiral trajectory, which greatly prolongs the residence time of iodine vapor in the discharge pipe 3, allowing it more time to contact the pipe wall and the low-temperature environment inside the pipe. This process not only allows the iodine vapor to fully absorb cooling energy, ensuring that gaseous iodine is completely condensed into solid refined iodine, avoiding the situation where some iodine vapor remains gaseous due to insufficient cooling, but also the spiral trajectory can effectively prevent iodine vapor from escaping upwards and being discharged with the exhaust pipe 303. This not only improves the iodine recovery rate, but also further ensures the purity of refined iodine, making the entire condensation and collection process more efficient and thorough.

[0038] The spiral blade 304 is rotatably connected inside the discharge pipe 3. A drive motor 305 is fixedly connected to the upper end of the discharge pipe 3. A second drive shaft 306 for driving the spiral blade 304 to rotate is fixedly connected to the output end of the drive motor 305. When the drive motor 305 starts, its output end drives the spiral blade 304 to rotate stably inside the discharge pipe 3 through the second drive shaft 306. During the rotation, the edge of the spiral blade 304 can form a flexible scraping with the inner wall of the discharge pipe 3 to scrape off the iodine crystals attached to the inner wall of the discharge pipe 3, avoiding long-term accumulation of iodine crystals that may cause blockage of the pipe wall and ensuring unobstructed passage inside the discharge pipe 3. At the same time, the scraped iodine crystals will be guided to the discharge port at the bottom of the discharge pipe 3 as the spiral blade 304 rotates, reducing the waste of iodine residue on the pipe wall, further improving the iodine recovery rate, and reducing the frequency and difficulty of subsequent manual cleaning of the discharge pipe 3, ensuring continuous and stable operation of the device.

[0039] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0040] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model.

Claims

1. A device for removing impurities from industrial crude iodine, characterized in that, Including the heating vessel (1), it also includes: The discharge pipe (3) is fixedly installed on the heating vessel (1) by a bracket (301); The air inlet of the discharge pipe (3) and the air outlet of the heating vessel (1) are connected to each other through the heat-insulating conveying pipe (2); The lower end of the discharge pipe (3) is provided with a discharge port for discharging refined iodine, and the upper end of the discharge pipe (3) is fixedly connected to an exhaust pipe (303) for discharging volatile gases of low-boiling-point impurities. The spiral heat exchange tube (302) is embedded in the wall of the discharge pipe (3) to heat and condense the gas by changing the temperature of the liquid flowing inside the spiral heat exchange tube (302).

2. The industrial crude iodine impurity removal device according to claim 1, characterized in that, The heating vessel (1) includes a vessel body (101), a vessel cover (102), a feeding valve pipe (103), and a discharge valve pipe (104). The heating element of the heating vessel (1) is disposed in the vessel body (101). The vessel cover (102) is detachably installed on the vessel body (101) by fastening bolts. The feeding valve pipe (103) is fixedly connected to the upper end of one side of the vessel body (101). The discharge valve pipe (104) is fixedly connected to the bottom of the vessel body (101). The bracket (301) is fixedly connected to the vessel body (101). The air outlet of the heating vessel (1) is opened on the vessel cover (102).

3. The industrial crude iodine impurity removal device according to claim 2, characterized in that, A geared motor (105) is fixedly connected to the lid (102). A first drive shaft (106) is fixedly connected to the output end of the geared motor (105). Multiple rows of stirring rods (107) are fixedly connected to the part of the first drive shaft (106) located inside the vessel body (101). A scraper (108) is fixedly connected to the end of each row of stirring rods (107) away from the first drive shaft (106). The scraper (108) slides against the inner wall of the vessel body (101).

4. The industrial crude iodine impurity removal device according to claim 3, characterized in that, An intercepting filter plate (4) is fixedly connected inside the vessel body (101) above the feeding valve pipe (103), and the first drive shaft (106) passes vertically through the intercepting filter plate (4).

5. The industrial crude iodine impurity removal device according to claim 4, characterized in that, Multiple air cylinders (5) are fixedly connected in a circular pattern at equal intervals on the upper end of the intercepting filter disc (4) on the first drive shaft (106). A piston rod (501) with a piston is slidably connected inside the air cylinder (5). A tension spring (502) is provided inside the air cylinder (5). The two ends of the tension spring (502) are fixedly connected to the piston on the piston rod (501) and the end of the air cylinder (5) near the first drive shaft (106), respectively. The end of the piston rod (501) extending out of the air cylinder (5) is rotatably connected to a roller (503) through a wheel seat. The vessel body (101) Multiple arc-shaped blocks (109) that cooperate with rollers (503) are fixedly connected in a circular pattern on the inner wall. One-way valves are installed in the air inlet and outlet of the air cylinder (5). A connecting air ring (506) is fixedly connected between the air cylinder (5) and the intercepting filter disc (4) on the first drive shaft (106). Multiple jet pipes (504) are fixedly connected in a circular pattern on the connecting air ring (506). Multiple nozzles are connected at equal intervals at the lower end of the jet pipes (504). The air inlet of each jet pipe (504) is connected to the air outlet of the adjacent air cylinder (5).

6. The industrial crude iodine impurity removal device according to claim 5, characterized in that, The jet pipe (504) is provided with a conical air passage (505), and the diameter of the conical air passage (505) gradually decreases from one end near the connecting air ring (506) to the other end.

7. The industrial crude iodine impurity removal device according to claim 1, characterized in that, The discharge pipe (3) is equipped with spiral blades (304) for ensuring that iodine vapor can be sufficiently cooled.

8. The industrial crude iodine impurity removal device according to claim 7, characterized in that, The spiral blade (304) is rotatably connected inside the discharge pipe (3). The upper end of the discharge pipe (3) is fixedly connected to a drive motor (305), and the output end of the drive motor (305) is fixedly connected to a second drive shaft (306) for driving the spiral blade (304) to rotate.

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