Efficient distillation and purification device for recycling epoxy chloropropane

Abstract

The utility model relates to the technical field of distillation purification equipment, in particular to an epoxy chloropropane recycling efficient distillation purification device which comprises a support, a distillation still is arranged on one side of the support, a purification mechanism is arranged on one side of the distillation still, and a rectifying tower is arranged at the top of the purification mechanism; a plurality of sealing components such as a first sealing cavity shell, a first sealing side plate, a first top plate, a second sealing cavity shell and a second sealing side plate jointly form a sealing structure, and a plurality of closed cavities are formed. Therefore, the epoxy chloropropane can be prevented from leaking in the purification process, material loss is reduced, environmental pollution is avoided, external impurities can be prevented from entering a purification system, and the quality of purified products is guaranteed. The sealing structure is favorable for maintaining the internal pressure and temperature conditions, is very important for chemical and physical processes needing to be carried out under specific conditions, and ensures the safety and high efficiency of the purification process.

Description

Technical Field

[0001] This application relates to the field of distillation and purification equipment technology, and in particular to a high-efficiency distillation and purification device for epichlorohydrin recycling. Background Technology

[0002] Epichlorohydrin is an important organic chemical raw material, widely used in the production of many chemical products such as epoxy resins, synthetic glycerin, and chlorohydrin rubber. However, the use of epichlorohydrin in chemical production processes generates large amounts of mixtures or waste containing epichlorohydrin. Direct discharge of these wastes not only wastes resources significantly but also causes serious environmental pollution. Therefore, recycling epichlorohydrin not only meets the requirements of resource conservation and sustainable development but also helps reduce production costs and environmental pressure on chemical enterprises. Traditional distillation purification technologies have many shortcomings in treating epichlorohydrin. Ordinary distillation equipment may not achieve high purity when separating epichlorohydrin from other components, resulting in product quality that does not meet the production requirements of some high-end chemical products. Moreover, traditional equipment lacks effective filtration and purification structures, limiting its ability to remove impurities, especially fine and volatile impurities, making efficient separation and removal difficult.

[0003] Regarding the aforementioned technologies, the inventors have discovered the following drawbacks: existing devices struggle to effectively remove impurities across different particle size ranges, particularly exhibiting poor filtration of fine impurities. This results in the final product's purity failing to meet high standards, thus hindering production processes requiring high purity epichlorohydrin. Furthermore, the lack of a robust sealing structure allows external impurities to easily enter the filtration system during the filtration process, leading to secondary contamination and reduced product quality. Utility Model Content

[0004] In view of the shortcomings of the prior art and in order to solve the problems mentioned in the background art, this application provides an epichlorohydrin recycling high-efficiency distillation and purification device.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an epichlorohydrin recycling high-efficiency distillation and purification device, including a support frame, a distillation kettle is provided on one side of the support frame, a purification mechanism is provided on one side of the distillation kettle, and a distillation column is provided on the top of the purification mechanism;

[0006] The purification mechanism includes a servo motor, a motor mounting plate, a first gear, a second gear, an internally threaded tube, a first sealing cavity shell, a first sealing side plate, a first top plate, a transfer chamber shell, a limiting plate, and a first filter hole. The servo motor is fixedly mounted on the top of a bracket. A motor mounting plate is fixedly connected to one side of the servo motor. A first gear is fixedly mounted on the output end of the servo motor. A second gear meshes with one side of the first gear. An internally threaded tube is fixedly sleeved on one side of the second gear. A first sealing side plate is movably sleeved on one side of the internally threaded tube. The first sealing side plate is bolted to one side of the first sealing cavity shell. A first top plate is bolted to the top of the first sealing cavity shell. A transfer chamber shell is connected to one side of the first sealing cavity shell. A limiting plate is fixedly connected inside the transfer chamber shell. Each limiting plate has a first filter hole on its top. The internally threaded tube rotates under the drive of the second gear, participating in the threaded engagement with an externally threaded screw to achieve a linear motion or adjustment function. It can also play a role in material conveying and filtration processes. The limiting plate is located inside the outer shell of the transfer chamber and is used to restrict the flow range of materials or fluids. The filter holes on it can perform preliminary filtration of the passing substances.

[0007] Optionally, the purification mechanism further includes a second sealing cavity shell, a second top plate, a second sealing side plate, an externally threaded screw, a chuck, a first inner sealing cavity side plate, a first inner sealing cavity shell, a first filter element, a second inner sealing cavity shell, a second filter element, a second inner sealing cavity side plate, a T-connector, a vacuum pump, a second filter hole, and a positioning block. The second sealing cavity shell is fixedly installed on one side of the transfer chamber shell. The top of the second sealing cavity shell is fixedly installed with a second top plate by bolts. The second sealing side plate is fixedly installed on one side of the second sealing cavity shell by bolts. The externally threaded screw is threaded into the inside of the internally threaded pipe. A chuck is fixedly connected to one side of the externally threaded screw. The first inner sealing cavity side plate is fixedly installed on one side of the chuck. The first inner sealing cavity side plate... A first filter element is installed inside the first inner sealing cavity shell, which is fixedly mounted on one side by bolts. A second inner sealing cavity shell is fixedly connected to one side of the first inner sealing cavity shell, and a second inner sealing cavity side plate is fixedly mounted on one side of the second inner sealing cavity shell by bolts. A second filter element is installed inside the second inner sealing cavity shell. A three-way pipe is fixedly installed on one side of the first and second sealing cavity shells, and the three-way pipe is connected to both the first and second sealing cavity shells. A vacuum pump is connected to one side of the three-way pipe. A second filter hole is opened through the top of both the first and second inner sealing cavity shells. A positioning block is provided inside both the first and second inner sealing cavity shells. An externally threaded screw cooperates with an internally threaded pipe to achieve linear motion through thread transmission, which can be used to adjust the position of internal components, thereby affecting the filtration or purification effect. A chuck connects the externally threaded screw and the first inner sealing cavity side plate, serving to transmit power and connect. The three-way pipe connects the outer shell of the first sealing cavity and the outer shell of the second sealing cavity, allowing the material to flow between them. It is also connected to a vacuum pump, which facilitates vacuuming of the entire system or adjustment of the pressure within the system.

[0008] Optionally, the positioning block is movably installed inside the first inner sealing cavity shell and the second inner sealing cavity shell, and a hole is opened through the top of the positioning block, and the first filter element is fixedly installed inside the hole at the top of the positioning block.

[0009] Optionally, the first sealing cavity shell, the transfer chamber shell, and the second sealing cavity shell together form a sealed cavity, and the top of both the first sealing cavity shell and the second sealing cavity shell are provided with filter replacement holes.

[0010] Optionally, the transfer chamber shell is fixedly installed on the top of the distillation vessel, and the transfer chamber shell is fixedly installed on the bottom of the distillation column. The sum of the lengths of the first sealing cavity shell and the transfer chamber shell is equal to the sum of the lengths of the first inner sealing cavity shell and the second inner sealing cavity shell.

[0011] Optionally, the outer shell of the first inner sealing cavity is located directly below the limiting plate, and the first filter element is located directly below the first filter hole.

[0012] Optionally, the position of the hole at the top of the positioning block corresponds to the position of the second filter hole, and a square sealing ring is provided at the connection between the side plate of the first inner sealing cavity and the outer shell of the first inner sealing cavity.

[0013] In summary, this application includes the following beneficial technical effects:

[0014] 1. This utility model utilizes multiple sealing components, including a first sealing cavity shell, a first sealing side plate, a first top plate, a second sealing cavity shell, and a second sealing side plate, to form a sealing structure, creating multiple sealed cavities. This prevents epichlorohydrin leakage during the purification process, reduces material loss, avoids environmental pollution, and also prevents external impurities from entering the purification system, ensuring the quality of the purified product. The sealing structure helps maintain internal pressure and temperature conditions, which is crucial for chemical and physical processes that require specific conditions, ensuring the safety and efficiency of the purification process.

[0015] 2. In use, this utility model effectively performs multi-stage filtration of epichlorohydrin through components such as the limiting plate and its filter holes, the first filter element, the second filter element, and the filter holes on the first and second inner sealing cavity shells. By using different positions and types of filtration, various impurities can be removed, improving the purity of epichlorohydrin and enhancing product quality. The filter elements are housed inside the first and second inner sealing cavity shells, and the positioning blocks ensure the stability of the filter elements, guaranteeing the stability and durability of the filtration process, making the filtration and purification effect more reliable, extending the service life of the filter elements, and reducing equipment maintenance costs. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the device in the embodiments of this application;

[0017] Figure 2 This is a schematic diagram of a partial structure of the device in an embodiment of this application;

[0018] Figure 3 This is a partial structural diagram of the purification mechanism in an embodiment of this application;

[0019] Figure 4 This is a schematic diagram of a partial structure installation of the purification mechanism in an embodiment of this application;

[0020] Reference numerals: 1. Support; 2. Distillation vessel; 3. Purification mechanism; 301. Servo motor; 302. Motor fixing side plate; 303. First gear; 304. Second gear; 305. Internally threaded pipe; 306. First sealing cavity shell; 307. First sealing side plate; 308. First top plate; 309. Transfer chamber shell; 310. Limiting plate; 311. First filter hole; 312. Second sealing cavity shell; 313. Second top plate; 314. Second sealing side plate; 315. Externally threaded screw; 316. Chuck; 317. First inner sealing cavity side plate; 318. First inner sealing cavity shell; 319. First filter element; 320. Second inner sealing cavity shell; 321. Second filter element; 322. Second inner sealing cavity side plate; 323. T-connector; 324. Vacuum pump; 325. Second filter hole; 326. Positioning block; 4. Distillation column; Detailed Implementation

[0021] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0022] This application discloses an efficient distillation and purification device for epichlorohydrin recycling.

[0023] Please see Figure 1 A high-efficiency distillation and purification device for epichlorohydrin recycling includes a support 1, a distillation kettle 2 is provided on one side of the support 1, a purification mechanism 3 is provided on one side of the distillation kettle 2, and a distillation column 4 is provided on the top of the purification mechanism 3.

[0024] Please see Figures 2 to 4 The purification mechanism 3 includes a servo motor 301, a motor mounting plate 302, a first gear 303, a second gear 304, an internally threaded tube 305, a first sealing cavity shell 306, a first sealing plate 307, a first top plate 308, a transfer chamber shell 309, a limiting plate 310, and a first filter hole 311. The servo motor 301 is fixedly mounted on the top of the bracket 1. The motor mounting plate 302 is fixedly connected to one side of the servo motor 301. The first gear 303 is fixedly mounted on the output end of the servo motor 301, and one side of the first gear 303 is engaged. The transmission includes a second gear 304, with an internally threaded tube 305 fixedly sleeved on one side of the second gear 304. A first sealing side plate 307 is movably sleeved on one side of the internally threaded tube 305. The first sealing side plate 307 is fixedly installed on one side of the first sealing cavity shell 306 by bolts. A first top plate 308 is fixedly installed on the top of the first sealing cavity shell 306 by bolts. A transfer chamber shell 309 is connected to one side of the first sealing cavity shell 306. A limit plate 310 is fixedly connected inside the transfer chamber shell 309. A first filter hole 311 is opened on the top of each limit plate 310.

[0025] The purification mechanism 3 also includes a second sealing cavity shell 312, a second top plate 313, a second sealing side plate 314, an external threaded screw 315, a chuck 316, a first inner sealing cavity side plate 317, a first inner sealing cavity shell 318, a first filter element 319, a second inner sealing cavity shell 320, a second filter element 321, a second inner sealing cavity side plate 322, a three-way pipe 323, a vacuum pump 324, a second filter hole 325, and a positioning block 326. The second sealing cavity shell 312 is fixedly installed on one side of the transfer chamber shell 309. The second top plate 313 is fixedly installed on the top of the second sealing cavity shell 312 by bolts. The second sealing side plate 314 is fixedly installed on one side of the second sealing cavity shell 312 by bolts. The external threaded screw 315 is threaded into the inside of the internal threaded pipe 305. A chuck 316 is fixedly connected to one side of the external threaded screw 315. The first inner sealing cavity side plate 317 is fixedly installed on one side of the chuck 316. Side plate 317 is fixedly installed on one side of first inner sealing cavity shell 318 by bolts. First filter element 319 is provided inside first inner sealing cavity shell 318. Second inner sealing cavity shell 320 is fixedly connected to one side of first inner sealing cavity shell 318. Second inner sealing cavity side plate 322 is fixedly installed on one side of second inner sealing cavity shell 320 by bolts. Second filter element 321 is provided inside second inner sealing cavity shell 320. Three-way pipe 323 is fixedly installed on one side of first sealing cavity shell 306 and second sealing cavity shell 312, and three-way pipe 323 is connected to first sealing cavity shell 306 and second sealing cavity shell 312 respectively. Vacuum pump 324 is connected to one side of three-way pipe 323. Second filter hole 325 is opened through the top of both first inner sealing cavity shell 318 and second inner sealing cavity shell 320. Positioning block 326 is provided inside both first inner sealing cavity shell 318 and second inner sealing cavity shell 320.

[0026] The positioning block 326 is movably installed inside the first inner sealing cavity shell 318 and the second inner sealing cavity shell 320, and a hole is opened through the top of the positioning block 326. The first filter element 319 is fixedly installed inside the hole at the top of the positioning block 326.

[0027] The first sealing cavity shell 306, the transfer chamber shell 309, and the second sealing cavity shell 312 together form a sealed cavity. The top of both the first sealing cavity shell 306 and the second sealing cavity shell 312 are provided with filter replacement holes.

[0028] The transfer chamber shell 309 is fixedly installed on the top of the distillation kettle 2 and the transfer chamber shell 309 is fixedly installed on the bottom of the distillation column 4. The sum of the lengths of the first sealing cavity shell 306 and the transfer chamber shell 309 is equal to the sum of the lengths of the first inner sealing cavity shell 318 and the second inner sealing cavity shell 320.

[0029] The first inner sealing cavity housing 318 is located directly below the limiting plate 310, and the first filter element 319 is located directly below the first filter hole 311.

[0030] The position of the hole at the top of the positioning block 326 corresponds to the position of the second filter hole 325, and a square sealing ring is provided at the connection between the first inner sealing cavity side plate 317 and the first inner sealing cavity outer shell 318.

[0031] Further explanation is needed:

[0032] Power and Transmission Function: The servo motor 301 in the purification mechanism 3 provides the power source for the entire mechanism. It drives the first gear 303 to rotate through its output power. The meshing transmission between the first gear 303 and the second gear 304 transmits power to the internally threaded tube 305, causing the internally threaded tube 305 to rotate. This power transmission system enables the mechanism to convert electrical energy into mechanical energy, driving the movement of subsequent operating components. The motor fixing plate 302 ensures the stability of the servo motor 301 during operation, preventing power output from being affected by motor vibration. The threaded engagement between the internally threaded tube 305 and the externally threaded lead screw 315 allows for relative movement under power, providing a power basis for the action or adjustment of other components, thereby affecting the overall operating state of the purification mechanism and ensuring that various actions during the purification process are carried out in an orderly and stable manner. Simultaneously, this power and transmission coordination also provides precise control for the adjustment and operation of the internal mechanical structure of the purification mechanism, allowing the mechanism to adjust its operating state according to different work requirements.

[0033] Filtration and Purification Functions: The purification mechanism 3 possesses excellent filtration and purification capabilities. The filter holes 311 on the limiting plate 310 can perform preliminary filtration of the material, initially separating larger impurity particles. The first filter element 319 and the second filter element 321 are respectively placed in the first inner sealing cavity shell 318 and the second inner sealing cavity shell 320, enabling further fine filtration of epichlorohydrin, removing fine impurities and improving its purity. The sealing structure of the first inner sealing cavity shell 318 and the second inner sealing cavity shell 320 ensures that the filtration process takes place in a relatively closed environment, avoiding secondary contamination by impurities. The positioning block 326 ensures the stability of the filter element position, preventing displacement during operation and ensuring the consistency and reliability of the filtration effect. Furthermore, the filter holes 325 also play a role in auxiliary filtration and gas / liquid flow during this process, further enhancing the purification effect of the entire mechanism, providing purer material for the subsequent distillation column, and improving the purification efficiency of the entire unit for epichlorohydrin reuse.

[0034] Connection and Sealing Functions: The transfer chamber shell 309 plays a crucial connecting role, linking the first sealing chamber shell 306, the second sealing chamber shell 312, and subsequent components such as the distillation column 4, allowing for smooth transfer of materials or gases between different components. The sealing structure formed by the first sealing chamber shell 306, the first sealing side plate 307, the first top plate 308, the second sealing chamber shell 312, and the second sealing side plate 314 ensures that the entire purification mechanism is a relatively closed system, preventing the leakage of epichlorohydrin and other substances to the outside, reducing material loss and environmental pollution. The three-way pipe 323 connects different parts, allowing for the orderly flow of fluids during the purification process. Its connection with the vacuum pump 324 allows the system to operate under vacuum or specific pressure conditions, further optimizing the purification process. The coordinated operation of the sealing and connecting structures ensures the stable operation of the entire purification mechanism, maintains the internal physicochemical environment, and creates favorable conditions for the efficient purification and reuse of epichlorohydrin.

[0035] The working principle of the above embodiments is as follows:

[0036] First, the material containing epichlorohydrin is introduced into distillation vessel 2. Inside distillation vessel 2, by heating, the various components in the material begin to change due to the different boiling points of the different substances. Epichlorohydrin and some other substances with lower boiling points are converted into vapor during the heating process, while substances with higher boiling points remain at the bottom of distillation vessel 2, thus achieving preliminary separation of the material. At this point, the vapor begins to move towards purification unit 3 connected to distillation vessel 2, preparing for the next step of purification treatment.

[0037] Next, after the steam enters the purification mechanism 3, the servo motor 301 starts. The servo motor 301 provides power to the purification mechanism 3, which drives the first gear 303 connected to it to rotate. The first gear 303 meshes with the second gear 304, transmitting power to the second gear 304, which in turn drives the internal threaded tube 305 to start rotating. This rotation may trigger a series of mechanical linkages, preparing for subsequent operations. When the steam enters the outer shell 309 of the transfer chamber, it first encounters the limiting plate 310. The filter holes 311 on the limiting plate 310 perform preliminary filtration of the steam, blocking and separating larger particulate impurities in the steam, allowing the relatively pure steam to continue flowing to the subsequent purification section, laying the foundation for subsequent deep purification.

[0038] Next, the pre-filtered steam enters the area comprised of the first sealed cavity shell 306 and the second sealed cavity shell 312. A first filter element 319 and a second filter element 321 are respectively installed in the first inner sealed cavity shell 318 and the second inner sealed cavity shell 320, and the position of the filter elements is ensured by a positioning block 326. As the steam passes through these filter elements, it undergoes fine filtration, removing even finer impurities and further improving the purity of epichlorohydrin. Throughout the purification process, the sealing structure formed by the first sealed cavity shell 306, the first sealing side plate 307, the first top plate 308, the second sealed cavity shell 312, and the second sealing side plate 314 plays a crucial role. These sealing structures ensure that the purification operation is carried out in a relatively closed environment, preventing external impurities from entering the purification area and avoiding leakage of the steam being processed and other intermediate products, thus ensuring the cleanliness and stability of the entire purification process.

[0039] Next, the three-way pipe 323 connects the first sealing chamber shell 306 and the second sealing chamber shell 312, allowing steam to flow smoothly between these two parts. Simultaneously, the vacuum pump 324, connected to the three-way pipe 323, begins operation, creating a vacuum environment for the entire purification mechanism 3. In this vacuum environment, the steam flow rate increases, facilitating faster passage of steam through the filter element and further removing volatile impurities, thus improving purification efficiency and effectiveness and ensuring a purer epichlorohydrin.

[0040] Finally, the steam, after being deeply purified by purification unit 3, flows upward and enters the distillation column 4 located at the top of purification unit 3. In distillation column 4, the steam is finely separated through multiple partial vaporization and partial condensation operations using the principle of distillation. During this process, epichlorohydrin in the steam undergoes multiple vaporization and condensation processes under different temperature and pressure conditions, based on its physical properties differences from other components. This further separates epichlorohydrin from other residual impurities, ultimately yielding a high-purity epichlorohydrin product.

[0041] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An efficient distillation purification device for recycling of epichlorohydrin, comprising a support (1), characterized in that: One side of the support (1) is provided with a distillation kettle (2), one side of the distillation kettle (2) is provided with a purification mechanism (3), the top of the purification mechanism (3) is provided with a rectifying tower (4); The purification mechanism (3) comprises a servo motor (301), a motor fixed side plate (302), a first gear (303), a second gear (304), an internal threaded pipe (305), a first sealing cavity shell (306), a first sealing side plate (307), a first top plate (308), an adapter bin shell (309), a limiting plate (310) and a first filter hole (311), the servo motor (301) is fixedly installed at the top of the support (1), one side of the servo motor (301) is fixedly connected with the motor fixed side plate (302), the output end of the servo motor (301) is fixedly installed with the first gear (303), one side of the first gear (303) is engaged with the second gear (304) in transmission, one side of the second gear (304) is fixedly sleeved with the internal threaded pipe (305), one side of the internal threaded pipe (305) is movably sleeved with the first sealing side plate (307), the first sealing side plate (307) is fixedly installed on one side of the first sealing cavity shell (306) through bolts, the top of the first sealing cavity shell (306) is fixedly installed with the first top plate (308) through bolts, one side of the first sealing cavity shell (306) is communicated with the adapter bin shell (309), the inside of the adapter bin shell (309) is fixedly connected with the limiting plate (310), and the top of the limiting plate (310) is provided with the first filter hole (311).

2. The high-efficiency distillation and purification device for recycling of epichlorohydrin according to claim 1, characterized in that: The purification mechanism (3) further includes a second sealing cavity shell (312), a second top plate (313), a second sealing side plate (314), an external thread screw rod (315), a chuck (316), a first inner sealing cavity side plate (317), a first inner sealing cavity shell (318), a first filter element (319), a second inner sealing cavity shell (320), a second filter element (321), a second inner sealing cavity side plate (322), a tee (323), a vacuum pump (324), a second filtering hole (325), and a positioning block (326), one side of the second sealing cavity shell (312) is fixedly installed on the adapter bin shell (309), the top of the second sealing cavity shell (312) is fixedly installed with the second top plate (313) through bolts, one side of the second sealing cavity shell (312) is fixedly installed with the second sealing side plate (314) through bolts, the external thread screw rod (315) is threadedly connected in the inner thread pipe (305), one side of the external thread screw rod (315) is fixedly connected with the chuck (316), one side of the chuck (316) is fixedly installed with the first inner sealing cavity side plate (317), the first inner sealing cavity side plate (317) is fixedly installed on one side of the first inner sealing cavity shell (318) through bolts, the first inner sealing cavity shell (318) is internally provided with the first filter element (319), one side of the first inner sealing cavity shell (318) is fixedly connected with the second inner sealing cavity shell (320), one side of the second inner sealing cavity shell (320) is fixedly installed with the second inner sealing cavity side plate (322) through bolts, the second inner sealing cavity shell (320) is internally provided with the second filter element (321), the tee (323) is fixedly installed on one side of the first sealing cavity shell (306) and the second sealing cavity shell (312), and the tee (323) is in communication with the first sealing cavity shell (306) and the second sealing cavity shell (312), respectively, one side of the tee (323) is in communication with the vacuum pump (324), the top of the first inner sealing cavity shell (318) and the second inner sealing cavity shell (320) is provided with the second filtering hole (325), and the first inner sealing cavity shell (318) and the second inner sealing cavity shell (320) are internally provided with the positioning block (326).

3. The high-efficiency distillation and purification device for recycling of epichlorohydrin according to claim 2, characterized in that: The positioning block (326) is movably installed in the first inner sealing cavity shell (318) and the second inner sealing cavity shell (320), and the top of the positioning block (326) is provided with a hole, and the first filter element (319) is fixedly installed in the hole in the top of the positioning block (326).

4. The high-efficiency distillation and purification device for recycling of epichlorohydrin according to claim 1, characterized in that: The first sealing cavity shell (306), the adapter bin shell (309), and the second sealing cavity shell (312) jointly form a closed cavity, and the top of the first sealing cavity shell (306) and the second sealing cavity shell (312) is provided with a filter element replacement hole.

5. The high-efficiency distillation and purification device for recycling of epichlorohydrin according to claim 1, characterized in that: The adapter housing (309) is fixedly installed on the top of the distillation kettle (2), the adapter housing (309) is fixedly installed on the bottom of the rectifying tower (4), and the sum of the lengths of the first sealing cavity housing (306) and the adapter housing (309) is equal to the sum of the lengths of the first inner sealing cavity housing (318) and the second inner sealing cavity housing (320).

6. The high-efficiency distillation and purification device for recycling of epichlorohydrin according to claim 2, characterized in that: The first inner sealing cavity housing (318) is arranged directly below the limiting plate (310), and the first filter element (319) is arranged directly below the first filtering hole (311).

7. The high-efficiency distillation and purification device for recycling of epichlorohydrin according to claim 2, characterized in that: The position of the hole in the top of the positioning block (326) corresponds to the second filtering hole (325), and a square sealing ring is arranged at the connection between the first inner sealing cavity side plate (317) and the first inner sealing cavity housing (318).

Images