A device for purifying industrial crude iodine

Abstract

The utility model discloses an industrial crude iodine purification device relates to the field of chemical equipment. A kind of industrial crude iodine purification device, including base, oil bath pan is fixedly installed on the base, the bottom of oil bath pan is fixedly installed with electric heater, further include: bearing tank, by fixed plate suspension installation in the oil bath pan, the tank mouth of the bearing tank is detachably connected with tank cover, and the tank cover is connected with feeding valve pipe;The utility model can construct stable high-temperature environment for iodine vapor in conveying pipe under the double heat preservation effect of heat preservation cover and heating gas, the hot gas flowing in heat preservation cover, continuously supplement heat, avoid the iodine vapor sublimation in advance caused by temperature deficiency in conveying, ensure that iodine vapor reaches cooling pipe in gaseous state, guarantee the continuity of subsequent sublimation operation, improve pure iodine output efficiency.

Description

Technical Field

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

[0002] Industrial crude iodine typically contains impurities such as mud, potassium iodide, and potassium chloride. High-purity iodine needs to be purified. Sublimation-condensation is one of the commonly used purification methods. Its principle is to take advantage of the fact that iodine is easy to sublimate and easy to condense after sublimation. By heating, iodine is sublimated from crude iodine into vapor, and then the vapor is cooled and condensed to obtain pure iodine. A traditional sublimation-condensation device generally includes a heating unit, a conveying pipeline, and a cooling and collection unit. After the crude iodine is heated and sublimated in the heating unit, it enters the cooling unit through the conveying pipeline and recondenses into solid iodine at a low temperature.

[0003] However, in practical applications, when iodine vapor passes through the conveying pipeline, due to heat dissipation from the pipeline or the influence of ambient temperature, the iodine vapor is prone to premature sublimation during the transport process, forming solid iodine that adheres to the inner wall of the pipeline. This not only leads to the loss of elemental iodine and reduces purification efficiency, but also causes pipeline blockage, affecting the continuous operation of the device. Frequent cleaning or replacement of the pipeline is required, increasing maintenance costs. In addition, in the cooling and collection unit, the iodine vapor does not have sufficient contact with the cooling surface, resulting in incomplete sublimation. Some iodine vapor is discharged without condensation, further reducing the pure iodine collection rate. 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 purification 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 purification device, including a base, an oil bath pot fixedly installed on the base, an electric heater fixedly installed at the bottom of the oil bath pot, and further including: a support tank, suspended in the oil bath pot by a fixing plate, a tank cover detachably connected to the opening of the support tank, and a feeding valve pipe connected to the tank cover; a pure iodine collection mechanism, installed on the base; a conveying pipe, with both ends connected to the air outlet of the tank cover and the air inlet of the pure iodine collection mechanism respectively; a heat insulation cover, sleeved on the outside of the conveying pipe, with an air inlet and an air outlet respectively opened on the heat insulation cover; an air pump, located on one side of the heat insulation cover, with the air outlet of the air pump connected to the air inlet of the heat insulation cover; and a heat exchange tube, located inside the oil bath pot, with both ends of the heat exchange tube extending out of the oil bath pot, and the air outlet of the heat exchange tube connected to the air inlet of the air pump.

[0006] Furthermore, the pure iodine collection mechanism includes: a cooling water tank, fixedly connected to the base on the side near the outlet of the conveying pipe; a cooling pipe, obliquely fixedly connected inside the cooling water tank, with both ends of the cooling pipe extending out of the cooling water tank, the inlet of the cooling pipe connected to the outlet of the conveying pipe, and the outlet of the cooling pipe connected to an external material extraction device; and a scraping mechanism for scraping off the pure iodine adhering to the inner wall of the cooling pipe, installed inside the cooling pipe.

[0007] Furthermore, the scraping mechanism includes a first rotating rod, a scraper, and a first motor. The first rotating rod is rotatably connected inside the cooling pipe. The scraper is fixedly connected to the first rotating rod at equal intervals around the circumference and slides against the inner wall of the cooling pipe. A support plate is fixedly connected to the side of the cooling pipe near the air inlet. The first motor and the air pump are both fixedly mounted on the support plate. One end of the first rotating rod extending out of the cooling pipe is fixedly connected to the output end of the first motor.

[0008] To ensure the temperature of the hot gas and reduce interference with the temperature of the heat transfer oil around the carrier tank, the heat exchange tube is located inside the oil bath between the electric heater and the carrier tank, and is close to the electric heater.

[0009] To further improve slag discharge efficiency, a slag discharge valve pipe is fixedly connected to the bottom of the bearing tank, and the outlet of the slag discharge valve pipe extends to an oil bath.

[0010] To further accelerate the evaporation rate of iodine vapor and improve the thoroughness and efficiency of slag removal, a second motor is fixedly connected to the tank cover, and a second rotating rod is fixedly connected to the output end of the second motor. The second rotating rod extends obliquely downward into the bearing tank, and multiple rows of stirring rods are fixedly connected to the second rotating rod.

[0011] To prevent fine impurities from entering the delivery pipe and ultimately mixing into the pure iodine collection mechanism, an arc-shaped intercepting filter is fixedly connected inside the can lid near the outlet.

[0012] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art: Under the dual heat preservation effect of the heat preservation cover and the heating gas, the present invention can create a stable high temperature environment for iodine vapor in the conveying pipe. The hot gas flowing in the heat preservation cover continuously replenishes the heat, avoids the iodine vapor from prematurely sublimating due to insufficient temperature during the conveying process, ensures that the iodine vapor arrives at the cooling pipe in a gaseous state, ensures the continuity of subsequent sublimation operations, and improves the pure iodine production efficiency.

[0013] When the scraper rotates, it divides the inside of the cooling tube into multiple small channels, increasing the contact area between iodine vapor and the inner wall of the cooling tube. The rapid rotation of the scraper accelerates heat exchange, allowing iodine vapor to condense more fully on the tube wall and improving the iodine vapor condensation rate per batch.

[0014] The suction force generated by the external material extraction equipment, combined with the scraping action of the scraper, forms a coordinated operation of scraping and suction. This not only avoids the accumulation of iodine crystals that block the pipes, but also ensures that the iodine crystals after sublimation are collected in a timely manner, reducing residual losses and significantly improving the pure iodine collection efficiency.

[0015] This device effectively solves the efficiency problems caused by premature or insufficient iodine vapor sublimation in traditional devices. It can stably and continuously process industrial crude iodine, meet the needs of large-scale purification, and help improve the efficiency and purity of industrial iodine production.

[0016] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0017] In the attached diagram:

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a partial cross-sectional view of the present invention. Figure 1 ;

[0020] Figure 3 This is a partial cross-sectional view of the present invention. Figure 2 ;

[0021] Figure 4 This utility model Figure 3 A schematic diagram of the structure of part A.

[0022] In the diagram: 1. Base; 2. Oil bath; 201. Electric heater; 202. Support tank; 203. Tank cover; 2031. Arc-shaped intercepting filter; 204. Conveying pipe; 205. Insulation cover; 206. Air pump; 207. Heat exchanger tube; 3. Cooling water tank; 301. Cooling pipe; 302. First rotating rod; 303. Scraper; 304. First motor; 4. Second rotating rod; 401. Stirring rod; 402. Second motor; 403. Slag discharge valve pipe; 5. Support plate. Detailed Implementation

[0023] 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.

[0024] Example 1:

[0025] Reference Figures 1-4An industrial crude iodine purification device includes a base 1, an oil bath 2 fixedly mounted on the base 1, an electric heater 201 fixedly mounted on the bottom of the oil bath 2, and further includes: a support tank 202, suspended inside the oil bath 2 by a fixing plate, a tank cover 203 detachably connected to the opening of the support tank 202, and a feeding valve pipe connected to the tank cover 203; a pure iodine collection mechanism mounted on the base 1; and a conveying pipe 204, with its two ends connected to the air outlet of the tank cover 203 and the pure iodine collection port, respectively. The air inlet of the iodine collection mechanism is connected; the heat insulation cover 205 is sleeved on the outside of the conveying pipe 204, and the heat insulation cover 205 is provided with an air inlet and an air outlet respectively; the air pump 206 is set on one side of the heat insulation cover 205, and the air outlet of the air pump 206 is connected to the air inlet of the heat insulation cover 205; the heat exchange tube 207 is set in the oil bath 2, and both ends of the heat exchange tube 207 extend out of the oil bath 2, and the air outlet of the heat exchange tube 207 is connected to the air inlet of the air pump 206.

[0026] The pure iodine collection mechanism includes: a cooling water tank 3, which is fixedly connected to the base 1 on the side near the air outlet of the conveying pipe 204; a cooling pipe 301, which is fixedly connected at an angle inside the cooling water tank 3, with both ends of the cooling pipe 301 extending out of the cooling water tank 3, the air inlet of the cooling pipe 301 being connected to the air outlet of the conveying pipe 204, and the discharge end of the cooling pipe 301 being connected to an external material extraction device; and a scraping mechanism for scraping off the pure iodine adhering to the inner wall of the cooling pipe 301, which is installed inside the cooling pipe 301.

[0027] The scraping mechanism includes a first rotating rod 302, a scraper 303, and a first motor 304. The first rotating rod 302 is rotatably connected inside the cooling pipe 301. The scraper 303 is circumferentially and equidistantly fixed to the first rotating rod 302 and slides against the inner wall of the cooling pipe 301. A support plate 5 is fixedly connected to the side of the cooling pipe 301 near the air inlet. The first motor 304 and the air pump 206 are both fixedly mounted on the support plate 5. One end of the first rotating rod 302 extending out of the cooling pipe 301 is fixedly connected to the output end of the first motor 304.

[0028] When purifying industrial crude iodine, the crude iodine is first pretreated. After pretreatment, the industrial crude iodine solution that has undergone pretreatment (removing insoluble impurities such as mud and sand, oxidizing potassium iodide to iodine, etc.) can be added to the carrier tank 202 through the feeding valve pipe on the tank cover 203. Then, coolant is injected into the cooling water tank 3 and the cooling water tank 3 is started to maintain a low temperature environment. Then, the power supply and connection status of equipment such as air pump 206, electric heater 201, and first motor 304 are checked.

[0029] After the preliminary work is completed, the electric heater 201 can be started to heat the heat transfer oil in the oil bath 2 to the specified temperature range. Through heat transfer, the crude iodine solution in the carrier tank 202 is heated, and the elemental iodine evaporates into iodine vapor. At the same time, the air pump 206 is started, and the outside gas flows in through the heat exchange tube 207 (the heat exchange tube 207 uses the heat of the oil bath 2 to heat the gas). The preheated gas enters the heat insulation cover 205 and flows along the outside of the conveying pipe 204 to keep the iodine vapor in the conveying pipe 204 warm. The iodine vapor enters the conveying pipe 204 from the carrier tank 202 through the gas outlet of the tank cover 203. The high temperature gas in the heat insulation cover 205 continuously keeps the conveying pipe 204 warm, preventing the iodine vapor from prematurely sublimating due to temperature drop, and ensuring that the iodine vapor flows stably to the cooling pipe 301.

[0030] After iodine vapor enters the cooling pipe 301, due to the low temperature environment of the cooling water tank 3, the iodine vapor quickly condenses into iodine crystals on the inner wall of the cooling pipe 301. At the same time, the first motor 304 is started, and the first rotating rod 302 drives the scraper 303 to rotate. The scraper 303 slides against the inner wall of the cooling pipe 301, scraping off the condensed iodine crystals. Meanwhile, the external material extraction equipment generates suction through the discharge end of the cooling pipe 301 to extract and collect pure iodine, and also assists the iodine vapor to flow into the cooling pipe 301, ensuring that the condensation process is continuous and sufficient.

[0031] The iodine crystals scraped off by the scraper 303 are extracted from the outlet end of the cooling pipe 301 under the suction of the extraction device, thus completing the collection of pure iodine.

[0032] With the dual insulation effect of the insulation cover 205 and the heating gas, a stable high-temperature environment can be created for the iodine vapor in the conveying pipe 204. The hot gas flowing in the insulation cover 205 continuously replenishes the heat, avoiding the iodine vapor from prematurely sublimating due to insufficient temperature during the conveying process. This ensures that the iodine vapor arrives at the cooling pipe 301 in a gaseous state, ensuring the continuity of subsequent sublimation operations and improving the pure iodine production efficiency.

[0033] When the scraper 303 rotates, it divides the interior of the cooling pipe 301 into multiple small channels, increasing the contact area between iodine vapor and the inner wall of the cooling pipe 301. The rapid rotation of the scraper 303 accelerates heat exchange, allowing the iodine vapor to condense more fully on the pipe wall, thereby increasing the iodine vapor condensation rate per batch.

[0034] The suction force generated by the external material extraction equipment, combined with the scraping action of the scraper 303, forms a coordinated operation of scraping and suction. This not only avoids the accumulation of iodine crystals that block the pipes, but also ensures that the iodine crystals after sublimation are collected in a timely manner, reducing residual losses and significantly improving the pure iodine collection effect.

[0035] This device effectively solves the efficiency problems caused by premature or insufficient iodine vapor sublimation in traditional devices. It can stably and continuously process industrial crude iodine, meet the needs of large-scale purification, and help improve the efficiency and purity of industrial iodine production.

[0036] Example 2:

[0037] Reference Figures 2-3 An industrial crude iodine purification device is basically the same as in Example 1, but with a further improvement: the heat exchange tube 207 is located inside the oil bath 2 between the electric heater 201 and the support tank 202, and is close to the electric heater 201. The electric heater 201 serves as the heat source of the oil bath 2, and the area around it has the highest temperature. The heat exchange tube 207 is arranged close to the electric heater 201, which can fully absorb the heat from the high-temperature area, allowing the gas flowing inside the tube to quickly heat up to near the oil bath temperature (e.g., 120~150℃), ensuring the heat preservation effect on the subsequent conveying pipe 204 and effectively preventing premature sublimation of iodine vapor. If the heat exchange tube 207 is far from the heat source or close to the support tank 202, it may absorb too much heat, causing local temperature fluctuations and affecting the overall thermal stability of the oil bath. Placing it near the heat source can efficiently obtain heat and avoid significant interference with the temperature of the heat transfer oil around the support tank 202, ensuring the temperature controllability of the crude iodine solution sublimation process and improving purification efficiency and stability.

[0038] Example 3:

[0039] Reference Figures 2-3 An industrial crude iodine purification device is basically the same as in Example 2, but with a further improvement: a slag discharge valve pipe 403 is fixedly connected to the bottom of the support tank 202, and an oil bath 2 extends from the outlet of the slag discharge valve pipe 403. By setting the slag discharge valve pipe 403 at the bottom of the support tank 202 and extending the oil bath 2, when a large amount of impurities (unsublimed mud, residual salt, etc.) accumulate in the support tank 202 during the crude iodine purification operation, the slag discharge valve pipe 403 can be opened and cleaning water can be injected into the tank. The water flow and gravity will quickly discharge the deposited impurities from the slag discharge valve pipe 403 without disassembling the support tank 202, simplifying the impurity cleaning process, avoiding the long-term accumulation of impurities from affecting the heat transfer efficiency and iodine purity of subsequent purification, ensuring the continuous and stable operation of the device, and improving maintenance convenience.

[0040] A second motor 402 is fixedly connected to the tank lid 203. A second rotating rod 4 is fixedly connected to the output end of the second motor 402. The second rotating rod 4 extends obliquely downward into the bearing tank 202. Multiple rows of stirring rods 401 are fixedly connected to the second rotating rod 4. During the heating and sublimation stage, the stirring rods 401 can fully stir the crude iodine solution, break the temperature gradient on the liquid surface, accelerate the evaporation rate of iodine vapor, and improve the sublimation efficiency. In the subsequent slag discharge process, the rotation of the stirring rods 401 can agitate the deposited impurities, so that the impurities are fully mixed with the washing water, and prevent the impurities from clumping and clogging the slag discharge valve pipe 403, which significantly improves the thoroughness and efficiency of slag discharge and reduces the frequency of manual cleaning.

[0041] Example 4:

[0042] Reference Figures 2-3 An industrial crude iodine purification device is basically the same as that in Example 2, but with the following additional feature: an arc-shaped intercepting filter 2031 is fixedly connected inside the can lid 203 near the gas outlet.

[0043] An arc-shaped intercepting filter 2031 is installed inside the can lid 203 near the outlet end. This effectively intercepts fine impurities (such as incompletely settled mud and sand particles, crystalline salt particles, etc.) that flow with iodine vapor. The arc-shaped structure design increases the contact area between the filter and the airflow, which does not hinder the smooth passage of iodine vapor. At the same time, the filter can prevent fine impurities from entering the delivery pipe 204 and eventually mixing into the pure iodine collection mechanism, thereby reducing the interference of impurities on the subsequent sublimation process and further improving the purity of the pure iodine product.

[0044] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0045] 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. An industrial crude iodine purification device, comprising a base (1), wherein an oil bath (2) is fixedly mounted on the base (1), and an electric heater (201) is fixedly mounted on the bottom of the oil bath (2), characterized in that, Also includes: The carrier tank (202) is suspended inside the oil bath (2) by a fixing plate. The opening of the carrier tank (202) is detachably connected to a tank cover (203), and a feeding valve pipe is connected to the tank cover (203). A pure iodine collection mechanism is installed on the base (1); The two ends of the conveying pipe (204) are respectively connected to the air outlet of the can lid (203) and the air inlet of the pure iodine collection mechanism; A heat insulation cover (205) is fitted onto the outside of the conveying pipe (204), and an air inlet and an air outlet are respectively provided on the heat insulation cover (205); An air pump (206) is provided on one side of the heat insulation cover (205), and the air outlet of the air pump (206) is connected to the air inlet of the heat insulation cover (205). A heat exchange tube (207) is installed inside the oil bath (2). Both ends of the heat exchange tube (207) extend out of the oil bath (2). The outlet of the heat exchange tube (207) is connected to the inlet of the air pump (206).

2. The industrial crude iodine purification device according to claim 1, characterized in that, The pure iodine collection facility includes: A cooling water tank (3) is fixedly connected to the base (1) on the side near the air outlet of the delivery pipe (204); Cooling pipe (301) is fixedly connected at an angle inside the cooling water tank (3). Both ends of the cooling pipe (301) extend out of the cooling water tank (3). The air inlet of the cooling pipe (301) is connected to the air outlet of the conveying pipe (204). The discharge end of the cooling pipe (301) is connected to an external material extraction device. A scraping mechanism for scraping off pure iodine adhering to the inner wall of the cooling pipe (301) is installed inside the cooling pipe (301).

3. The industrial crude iodine purification device according to claim 2, characterized in that, The scraping mechanism includes a first rotating rod (302), a scraper (303), and a first motor (304). The first rotating rod (302) is rotatably connected inside the cooling pipe (301). The scraper (303) is circumferentially and equidistantly fixed to the first rotating rod (302) and slides against the inner wall of the cooling pipe (301). A support plate (5) is fixedly connected to the side of the cooling pipe (301) near the air inlet. The first motor (304) and the air pump (206) are both fixedly installed on the support plate (5). One end of the first rotating rod (302) extending out of the cooling pipe (301) is fixedly connected to the output end of the first motor (304).

4. The industrial crude iodine purification device according to claim 1, characterized in that, The heat exchange tube (207) is located inside the oil bath (2) between the electric heater (201) and the carrier tank (202), and is close to the electric heater (201).

5. An industrial crude iodine purification device according to claim 1, characterized in that, The bottom of the carrier tank (202) is fixedly connected to a slag discharge valve pipe (403), and the outlet of the slag discharge valve pipe (403) extends to an oil bath (2).

6. An industrial crude iodine purification device according to claim 5, characterized in that, A second motor (402) is fixedly connected to the lid (203). A second rotating rod (4) is fixedly connected to the output end of the second motor (402). The second rotating rod (4) extends obliquely downward into the bearing tank (202). Multiple rows of stirring rods (401) are fixedly connected to the second rotating rod (4).

7. An industrial crude iodine purification device according to claim 1, characterized in that, An arc-shaped intercepting filter (2031) is fixedly connected inside the can lid (203) near the air outlet.

Images