Chemical raw material distiller

Abstract

The utility model provides a raw material distiller for chemical industry relates to chemical raw material processing technical field, the utility model discloses distillation kettle and storage tank, the utility model discloses a convenient replacement device is set up, when the filter screen uses a period of time, can first install the replacement filter screen in the other mounting hole of slide in the auxiliary mechanism of filter frame with the help in, then starts the electric telescopic handle on the boss and drives the slide in the rectangular hole on the round pass block one end, and the replacement filter screen slides into the inner wall of the round pass block and carries out the filtration treatment, and the filter frame and filter screen after using then slide out, at this time, through the auxiliary mechanism, the filter frame and filter screen after using are detached from the mounting hole, and the next time alternately changes and uses conveniently, through this alternately changes, can change the filter screen and handle under the condition that the conveying pipe does not need to remove, improve the replacement efficiency, reduce manpower and time cost, improve the efficiency of distillation processing.

Description

Technical Field

[0001] This utility model relates to the field of chemical raw material processing technology, and in particular to a chemical raw material distillation apparatus. Background Technology

[0002] A distiller is a device used in chemical production processes to separate, purify, or refine liquid chemical substances through distillation. It utilizes the difference in boiling points of different components, heating the liquid components to evaporate them, and then condensing and recovering the vapor to achieve the purpose of separation and purification.

[0003] When distilling a methanol-water mixture in a distillation vessel, the raw material may contain impurities such as solid particles and flocculent matter. To prevent these impurities from clogging the internal pipes of the distillation vessel and affecting the distillation effect, a filter screen is usually installed at the feed pipe of the distillation vessel for preliminary filtration of the mixture. However, after a period of use, impurities gradually accumulate on the filter screen, causing it to become clogged. This affects the feed rate and flow rate of the mixture, thereby reducing the distillation efficiency. At this point, the filter screen needs to be replaced. However, in the existing technology, to replace the filter screen, the feed pipe at the feed pipe must first be removed before the clogged filter screen can be taken out and a new filter screen installed. This replacement method is cumbersome, consumes a lot of manpower and time, and reduces the efficiency of the distillation process. Utility Model Content

[0004] The technical problem this invention aims to solve is as follows: Since the methanol-water mixture may contain impurities such as solid particles and flocculent matter, a filter screen is typically installed at the feed pipe of the distillation vessel to prevent these impurities from clogging the internal pipes and affecting the distillation effect. This filter screen performs preliminary filtration of the mixture. However, after a period of use, impurities gradually accumulate on the filter screen, causing it to become clogged. This affects the feed rate and flow rate of the mixture, thereby reducing distillation efficiency. In this case, the filter screen needs to be replaced. However, in the prior art, replacing the filter screen requires first removing the feed pipe to remove the clogged filter screen and install a new one. This replacement method is cumbersome, consumes significant manpower and time, and reduces the efficiency of the distillation process.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a chemical raw material distillation apparatus, including a distillation kettle and a storage tank. A conveying pipe is installed at the feed pipe of the distillation kettle, and a connecting pipe is provided at the discharge pipe of the distillation kettle. A condenser is provided at one end of the connecting pipe. The outlet of the condenser is detachably installed at the inlet of the storage tank. A replacement device is provided between the feed pipe and the conveying pipe on one side of the distillation kettle. The replacement device can detachably install several filter screens in two mounting holes on the slide through the filter frame, and then achieve the effect of easy replacement by exchanging them back and forth.

[0006] Preferably, the easy-to-replace device includes a round block, the inner walls of which at both ends are respectively provided with fixing mechanisms between the conveying pipe and the feed pipe of the distillation vessel, and the inner wall of the round block has a rectangular hole; a slide, wherein the slide is slidably installed in the inner wall of the rectangular hole, and mounting holes are symmetrically opened on one side of the slide; two filter frames, wherein the filter frames are inserted into the inner wall of the mounting holes, and auxiliary mechanisms are provided between both sides and the inner wall of the mounting holes; a plurality of filter screens, wherein a plurality of filter screens are fixedly installed in the inner wall of the filter frames; a protrusion, wherein one side of the protrusion is fixedly installed on one side of the round block; and an electric telescopic rod, wherein one end of the electric telescopic rod is fixedly installed on one side of the protrusion, and the other output end is fixedly installed on one side of the slide.

[0007] The effect achieved by the above-mentioned components is as follows: By setting up an easy-to-replace device, before using the distillation kettle to distill the methanol-water mixture, the round block can be installed between the conveying pipe and the feed pipe of the distillation kettle through a fixing mechanism. Then, the methanol-water mixture raw material is conveyed to the feed pipe of the distillation kettle through the conveying pipe. At this time, it will first pass through several filter screens in the mounting holes on the carriage to filter out solid particles and flocculent matter contained in the methanol-water mixture raw material, thereby improving the purity of the subsequent distillation. Then, the filtered methanol-water mixture raw material will enter the distillation kettle through the feed pipe for heating and distillation processing, causing the methanol-water mixture raw material to vaporize. Then, the vaporized methanol-water mixture raw material will enter through the connecting pipe. The condensate is collected in the condenser and finally stored in the storage tank. After the filter screen has been used for a period of time, the replacement filter screen can be installed in another mounting hole on the slide using the filter rack and auxiliary mechanism. Then, the electric telescopic rod on the protrusion is activated to drive the slide to one end in the rectangular hole on the round block, sliding the replacement filter screen into the inner wall of the round block for filtration. The used filter rack and filter screen slide out, and then the used filter rack and filter screen are removed from the mounting hole using the auxiliary mechanism for easy replacement next time. By alternating in this way, the filter screen can be replaced without removing the delivery pipe, improving replacement efficiency, reducing labor and time costs, and improving the efficiency of distillation processing.

[0008] Preferably, a reinforcing rod is symmetrically fixedly installed on the outer surface of the output end of the electric telescopic rod, and one side of the reinforcing rod is fixedly installed on one side of the slide.

[0009] The effect achieved by the above components is that by setting up reinforcing rods, the connection area between the output end of the electric telescopic rod and the carriage can be increased, making the connection more secure and less prone to damage.

[0010] Preferably, the auxiliary mechanism includes two spring clips, and the filter frame has symmetrical sliding holes on both sides. The inner wall of the mounting hole has a plurality of slots symmetrically provided. The spring clips are slidably installed in the inner wall of the sliding holes, and one end is inserted into the inner wall of the slots.

[0011] The effect achieved by the above components is as follows: By setting up an auxiliary mechanism, when inserting the filter frame and filter screen into the mounting hole, first pull the spring block to one end of the sliding hole to a certain position, causing the spring block to retract into the sliding hole. Then, after inserting the filter frame into the mounting hole to a certain position, release the spring block so that it resets and locks into the corresponding slot, thus fixing the filter frame in the inner wall of the mounting hole. Similarly, when replacement is needed, the reverse operation is performed to disassemble it for easy replacement and maintenance.

[0012] Preferably, the longitudinal section of the filter screen is trapezoidal, and the end of the filter screen closer to the conveying pipe is larger than the other end.

[0013] The effect achieved by the above components is that by setting the longitudinal section of the filter screen to a trapezoidal shape, when solid particles are intercepted, the intercepted objects will fall at the bottom of the filter screen, reducing the possibility of clogging around the inner wall and improving the filtration effect.

[0014] Preferably, the fixing mechanism includes two limiting rods, one end of which is rotatably mounted on one side of the round block, and one side of several limiting rods respectively abutting against one side of the conveying pipe and one side of the feed pipe on the distillation vessel. One end of the conveying pipe and one end of the feed pipe on the distillation vessel are respectively inserted into the inner walls of both ends of the round block; two torsion springs, the inner walls of which are sleeved on the outer surface of one end of the limiting rod, and both ends are respectively fixedly mounted on one side of the limiting rod and one side of the round block; and two sealing ring blocks, one side of which is fixedly mounted on one side of the inner wall of the round block, and one side of each sealing ring block abutting against one side of the conveying pipe and one side of the feed pipe on the distillation vessel.

[0015] The effect achieved by the above-mentioned components is as follows: by setting a fixing mechanism, when installing the round block, the limiting rod can be rotated to a certain angle first, and then the torsion spring will be deformed. Finally, after inserting one end of the conveying pipe and one end of the feed pipe on the distillation vessel into the inner wall of the round block, the limiting rod is released. Under the reset action of the torsion spring, one side of several limiting rods will abut against one side of the conveying pipe and one side of the feed pipe on the distillation vessel, thus fixing the round block between the conveying pipe and the feed pipe. Similarly, when it is necessary to replace the whole unit, it can be disassembled and replaced.

[0016] Preferably, magnet blocks are symmetrically fixedly installed on one side of the conveying pipe and on one side of the feed pipe on the distillation vessel. The limiting rod is made of iron, and one end of the limiting rod is inserted into the inner wall of the magnet block and is magnetically attracted to one side of the magnet block.

[0017] The effect achieved by the above components is as follows: by setting a magnet, after the torsion spring drives the limiting rod to reset, one end can be inserted into the inner wall of the magnet and be attracted and fixed by the magnet, thereby performing secondary fixing and limiting, making the limiting more secure.

[0018] Preferably, limit blocks are symmetrically fixedly installed on the inner walls of both ends of the round block, and limit grooves are symmetrically opened on one side of the conveying pipe and the feed pipe on the distillation vessel, with the limit blocks inserted into the inner walls of the limit grooves.

[0019] The effect achieved by the above components is as follows: by setting the limiting block and the limiting groove, when one end of the conveying pipe and one end of the feed pipe on the distillation vessel are respectively inserted into the inner wall of the round block, the limiting groove on the outer surface can be aligned with the limiting block in the inner wall of the round block. This allows the limiting rod to be quickly aligned with the magnet and inserted, which is convenient for installation.

[0020] The beneficial effects of this utility model are:

[0021] By incorporating a convenient replacement device, after a period of use, the replacement filter can be installed in another mounting hole on the slide using the filter holder and an auxiliary mechanism. Then, the electric telescopic rod on the protrusion is activated to slide the slide into the rectangular hole on the round block, allowing the replacement filter to slide into the inner wall of the round block for filtration. The used filter holder and filter then slide out. At this point, the auxiliary mechanism allows the used filter holder and filter to be removed from the mounting hole for easy replacement next time. This alternating replacement allows the filter to be replaced without removing the delivery pipe, improving replacement efficiency, reducing labor and time costs, and increasing the efficiency of distillation processing. Attached Figure Description

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] Figure 1 This is a schematic diagram of the structure of this utility model.

[0024] Figure 2 This is a three-dimensional structural diagram of the distillation vessel of this utility model;

[0025] Figure 3 for Figure 2 A three-dimensional schematic diagram of a local structure;

[0026] Figure 4 This is a three-dimensional structural diagram of the circular block of this utility model;

[0027] Figure 5 for Figure 4 A three-dimensional schematic diagram of a local structure;

[0028] Figure 6 This is a three-dimensional structural diagram of the carriage of this utility model;

[0029] Figure 7 for Figure 6 A magnified three-dimensional structural diagram at point A in the middle.

[0030] Legend: 1. Distillation vessel; 2. Easy-to-change device; 3. Delivery pipe; 4. Connecting pipe; 5. Condenser; 6. Storage tank; 21. Round block; 22. Rectangular hole; 23. Slide; 24. Mounting hole; 25. Filter rack; 26. Filter screen; 27. Auxiliary mechanism; 271. Sliding hole; 272. Slot; 273. Spring block; 28. Fixing mechanism; 281. Limiting rod; 282. Torsion spring; 283. Sealing ring block; 284. Magnet block; 285. Limiting groove; 286. Limiting block; 29. ​​Protrusion; 210. Electric telescopic rod; 211. Reinforcing rod. Detailed Implementation

[0031] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0032] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0033] Figure 1-7The chemical raw material distillation apparatus shown includes a distillation vessel 1 and a storage tank 6. A conveying pipe 3 is installed at the feed pipe of the distillation vessel 1, and a connecting pipe 4 is provided at the discharge pipe of the distillation vessel 1. A condenser 5 is provided at one end of the connecting pipe 4. The outlet of the condenser 5 is detachably installed at the inlet of the storage tank 6. A replacement device 2 is provided between the feed pipe of the distillation vessel 1 and the conveying pipe 3. The replacement device 2 allows several filter screens 26 to be detachably installed in two mounting holes 24 on the slide 23 through filter frames 25, and then easily replaced by exchanging them.

[0034] Figure 1-7The interchangeable device 2 shown includes a round block 21, with fixing mechanisms 28 between the inner walls of both ends of the round block 21 and the feed pipes of the conveying pipe 3 and the distillation vessel 1, respectively. The inner wall of the round block 21 has a rectangular hole 22. A slide 23 is slidably installed in the inner wall of the rectangular hole 22, and mounting holes 24 are symmetrically opened on one side of the slide 23. Two filter frames 25 are inserted into the inner wall of the mounting holes 24, and auxiliary mechanisms 27 are provided between both sides and the inner wall of the mounting holes 24. Several filter screens 26 are fixedly installed in the inner wall of the filter frames 25. A protrusion 29 is fixedly installed on one side of the round block 21. An electric telescopic rod 210 is fixedly installed on one side of the protrusion 29, and the other end is fixedly installed on one side of the slide 23. By incorporating a replaceable device 2, before distilling the methanol-water mixture in the distillation vessel 1, a round block 21 can be installed between the conveying pipe 3 and the feed pipe of the distillation vessel 1 via a fixing mechanism 28. The methanol-water mixture raw material is then conveyed to the feed pipe of the distillation vessel 1 through the conveying pipe 3. It will first pass through several filter screens 26 in the mounting holes 24 on the slide 23 to filter out solid particles and flocculent matter, improving the purity of the subsequent distillation. The filtered methanol-water mixture raw material then enters the distillation vessel 1 through the feed pipe for heating and distillation, causing it to vaporize. The vaporized methanol-water mixture raw material then enters the condenser 5 through the connecting pipe 4 for condensation, and finally enters the storage tank 6 for storage. After the filter screen 26 has been used for a period of time, the replacement filter screen 26 can be installed in another mounting hole 24 on the slide 23 through the filter frame 25 with the help of the auxiliary mechanism 27. Then, the electric telescopic rod 210 on the protrusion 29 is activated to drive the slide 23 to slide to one end in the rectangular hole 22 on the round block 21, so that the replacement filter screen 26 can slide into the inner wall of the round block 21 for filtration. The used filter frame 25 and filter screen 26 slide out. At this time, the used filter frame 25 and filter screen 26 can be removed from the mounting hole 24 through the auxiliary mechanism 27 for easy replacement next time. By replacing them in this way, the filter screen 26 can be replaced without removing the conveying pipe 3, which improves the replacement efficiency, reduces labor and time costs, and improves the efficiency of distillation processing.

[0035] Figure 1-7The output end of the electric telescopic rod 210 shown is symmetrically fixed with reinforcing rods 211, one side of which is fixedly mounted on one side of the slide 23. By setting the reinforcing rods 211, the connection area between the output end of the electric telescopic rod 210 and the slide 23 can be increased, making the connection more secure and less prone to damage. The auxiliary mechanism 27 includes two spring blocks 273. The filter frame 25 has symmetrically opened sliding holes 271 on both sides. The inner wall of the mounting hole 24 has symmetrically opened slots 272. The spring blocks 273 are slidably installed in the inner wall of the sliding hole 271, and one end is inserted into the inner wall of the slot 272. By setting the auxiliary mechanism 27, when inserting the filter frame 25 and filter screen 26 into the mounting hole 24, first pull the spring clip 273 to one end of the sliding hole 271 to a certain position, causing the spring clip 273 to retract into the sliding hole 271. Then, after inserting the filter frame 25 into the mounting hole 24 to a certain position, release the spring clip 273 to reset it and lock it into the corresponding slot 272. This will fix the filter frame 25 in the inner wall of the mounting hole 24. Similarly, when replacement is needed, the reverse operation can be performed to disassemble it for easy replacement and maintenance. The longitudinal section of the filter screen 26 is trapezoidal, with the end of the filter screen 26 closer to the conveying pipe 3 being larger than the other end. By setting the longitudinal section of the filter screen 26 to a trapezoidal shape, when intercepting solid particles, the intercepted objects will fall at the bottom of the filter screen 26, reducing the possibility of clogging around the inner wall and improving the filtration effect.

[0036] Figure 1-7The fixing mechanism 28 shown includes two limiting rods 281, one end of which is rotatably mounted on one side of the round block 21, and one side of several limiting rods 281 respectively abutting against one side of the conveying pipe 3 and one side of the feed pipe on the distillation vessel 1. One end of the conveying pipe 3 and one end of the feed pipe on the distillation vessel 1 are respectively inserted into the inner walls of both ends of the round block 21; two torsion springs 282, the inner wall of which is sleeved on the outer surface of one end of the limiting rod 281, and both ends are respectively fixedly mounted on one side of the limiting rod 281 and one side of the round block 21; and two sealing ring blocks 283, one side of which is fixedly mounted on one side of the inner wall of the round block 21, and one side of each sealing ring block 283 abutting against one side of the conveying pipe 3 and one side of the feed pipe on the distillation vessel 1. By setting the fixing mechanism 28, when installing the round block 21, the limiting rod 281 can be rotated to a certain angle first, and then the torsion spring 282 will be deformed. Finally, after inserting one end of the conveying pipe 3 and one end of the feed pipe on the distillation vessel 1 into the inner wall of the round block 21, the limiting rod 281 is released. Under the reset action of the torsion spring 282, one side of several limiting rods 281 will abut against one side of the conveying pipe 3 and one side of the feed pipe on the distillation vessel 1, and the round block 21 will be fixedly installed between the conveying pipe 3 and the feed pipe. Similarly, when it is necessary to replace the whole, it can be disassembled and replaced.

[0037] Figure 1-7 Magnet blocks 284 are symmetrically fixedly installed on one side of the conveying pipe 3 and on one side of the feed pipe on the distillation vessel 1. A limiting rod 281, made of iron, is inserted into the inner wall of the magnet block 284 and is magnetically attracted to one side of the magnet block 284. By setting the magnet block 284, after the torsion spring 282 drives the limiting rod 281 to reset, one end can be inserted into the inner wall of the magnet block 284 and attracted and fixed by the magnet block 284, thus performing secondary fixing and limiting, making the limiting more secure. Limiting blocks 286 are symmetrically fixedly installed on the inner walls of both ends of the round block 21. Limiting grooves 285 are symmetrically opened on one side of the conveying pipe 3 and on one side of the feed pipe on the distillation vessel 1, and the limiting blocks 286 are inserted into the inner walls of the limiting grooves 285. By setting the limiting block 286 and the limiting groove 285, when one end of the conveying pipe 3 and one end of the feed pipe on the distillation vessel 1 are respectively inserted into the inner wall of the round block 21, the limiting groove 285 on the outer surface can be aligned with the limiting block 286 in the inner wall of the round block 21. This allows the limiting rod 281 to quickly align with the magnet block 284 and be inserted, which is convenient for installation.

[0038] Working principle: Before distilling the methanol-water mixture in the distillation vessel 1, the limiting rod 281 can be rotated to a certain angle, causing the torsion spring 282 to deform. Then, one end of the conveying pipe 3 and one end of the feed pipe on the distillation vessel 1 are inserted into the inner wall of the round block 21. After releasing the limiting rod 281, under the reset action of the torsion spring 282, one side of each limiting rod 281 will abut against one side of the conveying pipe 3 and the feed pipe of the distillation vessel 1. The methanol-water mixture raw material is then conveyed through the conveying pipe 3 to the feed pipe of the distillation vessel 1. It will first pass through several filter screens 26 in the mounting holes 24 on the slide 23 to filter out solid particles and flocculent matter, improving the purity of the subsequent distillation. The filtered methanol-water mixture raw material then enters the distillation vessel 1 through the feed pipe for heating and distillation processing, thus improving the purity of the methanol-water mixture raw material. The vaporized methanol-water mixture raw material enters the condenser 5 through the connecting pipe 4 for condensation, and finally enters the storage tank 6 for storage. After the filter screen 26 has been used for a period of time, the replacement filter screen 26 can be installed in another mounting hole 24 on the slide 23 through the filter frame 25 with the help of the auxiliary mechanism 27. Then, the electric telescopic rod 210 on the protrusion 29 is activated to drive the slide 23 to slide to one end in the rectangular hole 22 on the round block 21, so that the replacement filter screen 26 can slide into the inner wall of the round block 21 for filtration. The used filter frame 25 and filter screen 26 slide out. At this time, the used filter frame 25 and filter screen 26 can be removed from the mounting hole 24 through the auxiliary mechanism 27 for easy replacement next time. By replacing them in this way, the filter screen 26 can be replaced without removing the delivery pipe 3, which improves the replacement efficiency, reduces labor and time costs, and improves the efficiency of distillation processing.

[0039] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A chemical raw material distillation apparatus, comprising a distillation kettle (1) and a storage tank (6), characterized in that: The feed pipe of the distillation vessel (1) is equipped with a conveying pipe (3), and the discharge pipe of the distillation vessel (1) is equipped with a connecting pipe (4). A condenser (5) is provided at one end of the connecting pipe (4). The outlet of the condenser (5) is detachably installed at the inlet of the storage tank (6). A replacement device (2) is provided between the feed pipe and the conveying pipe (3) of the distillation vessel (1). The replacement device (2) can detachably install several filter screens (26) in two mounting holes (24) on the slide (23) through the filter frame (25), and then achieve the effect of easy replacement by exchanging them back and forth.

2. The chemical raw material distillation apparatus according to claim 1, characterized in that: The easy-to-replace device (2) includes a round block (21), and the inner walls of the two ends of the round block (21) are respectively provided with fixing mechanisms (28) between the conveying pipe (3) and the feed pipe of the distillation vessel (1). The inner wall of the round block (21) has a rectangular hole (22). The slide (23) is slidably installed in the inner wall of the rectangular hole (22), and mounting holes (24) are symmetrically opened on one side of the slide (23). Two filter holders (25) are inserted into the inner wall of the mounting hole (24), and auxiliary mechanisms (27) are provided on both sides between the filter holders (25) and the inner wall of the mounting hole (24). A plurality of filter screens (26), wherein a plurality of filter screens (26) are fixedly installed in the inner wall of the filter frame (25); A protrusion (29), wherein one side of the protrusion (29) is fixedly mounted on one side of the round block (21); An electric telescopic rod (210) is provided, wherein one end of the electric telescopic rod (210) is fixedly installed on one side of the protrusion (29), and the other end of the output end is fixedly installed on one side of the carriage (23).

3. A chemical raw material distillation apparatus according to claim 2, characterized in that: A reinforcing rod (211) is symmetrically fixedly installed on the outer surface of the output end of the electric telescopic rod (210), and one side of the reinforcing rod (211) is fixedly installed on one side of the slide (23).

4. A chemical raw material distillation apparatus according to claim 2, characterized in that: The auxiliary mechanism (27) includes two spring clips (273). The filter frame (25) has symmetrical sliding holes (271) on both sides. The inner wall of the mounting hole (24) has a number of slots (272) symmetrically opened. The spring clips (273) are slidably installed in the inner wall of the sliding hole (271) and one end is inserted into the inner wall of the slot (272).

5. A chemical raw material distillation apparatus according to claim 2, characterized in that: The longitudinal section of the filter screen (26) is trapezoidal, and the size of the end of the filter screen (26) closer to the conveying pipe (3) is larger than that of the other end.

6. A chemical raw material distillation apparatus according to claim 2, characterized in that: The fixing mechanism (28) includes two limiting rods (281), one end of which is rotatably mounted on one side of the round block (21), and one side of several limiting rods (281) respectively abuts against one side of the conveying pipe (3) and one side of the feed pipe on the distillation vessel (1). One end of the conveying pipe (3) and one end of the feed pipe on the distillation vessel (1) are respectively inserted into the inner walls of both ends of the round block (21). Two torsion springs (282), wherein the inner wall of the torsion springs (282) is sleeved on the outer surface of one end of the limiting rod (281), and the two ends are respectively fixedly installed on one side of the limiting rod (281) and one side of the round block (21); Two sealing ring blocks (283) are provided, with one side of the sealing ring block (283) fixedly installed on one side of the inner wall of the round block (21), and one side of the two sealing ring blocks (283) respectively abutting against one side of the conveying pipe (3) and one side of the feed pipe on the distillation vessel (1).

7. A chemical feedstock distillation apparatus according to claim 6, characterized in that: Magnet blocks (284) are symmetrically fixed on one side of the conveying pipe (3) and the feed pipe side of the distillation vessel (1). The limiting rod (281) is made of iron. One end of the limiting rod (281) is inserted into the inner wall of the magnet block (284) and is magnetically attracted to one side of the magnet block (284).

8. A chemical feedstock distillation apparatus according to claim 6, characterized in that: Limiting blocks (286) are symmetrically fixedly installed on the inner walls of both ends of the round block (21). Limiting grooves (285) are symmetrically opened on one side of the conveying pipe (3) and the feed pipe side of the distillation vessel (1). The limiting blocks (286) are inserted into the inner wall of the limiting grooves (285).

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