Acetaldehyde rectification device

Abstract

The utility model discloses an acetaldehyde rectification device, and relates to the technical field of acetaldehyde rectification, the acetaldehyde rectification device comprises a first-stage heating tank and a graded rectification mechanism, and the graded rectification mechanism is arranged above the first-stage heating tank; through the arrangement of the graded rectification mechanism, acetaldehyde needing to be rectified is added into a first-stage heating tank through a feeding pipe and is heated through an electric control heater to be rectified, meanwhile, the contact area with acetaldehyde is increased through a convex ring on the surface, the heating uniformity is ensured, a second-stage heating tank is connected through a threaded connection ring, and the acetaldehyde rectification efficiency is improved. The whole heating tank is convenient to disassemble and assemble, the interior of the tank body is convenient to clean, impurity deposition is avoided, meanwhile, acetaldehyde gas is filtered through a filter screen, acetaldehyde on the upper layer is prevented from directly flowing down, acetaldehyde in the two layers of heating tanks is prevented from being directly mixed, and the quality of acetaldehyde is prevented from being influenced; and the acetaldehyde gas is collected through a discharge port, so that the acetaldehyde gas collection convenience is improved.

Description

Technical Field

[0001] This utility model relates to the field of acetaldehyde distillation technology, and in particular to an acetaldehyde distillation apparatus. Background Technology

[0002] Acetaldehyde is an organic compound, also known as acetal. It is a colorless, transparent liquid with a strong, pungent odor and is readily soluble in water and many organic solvents. Acetaldehyde has a wide range of industrial applications. It is not only a raw material for manufacturing chemical products such as paraacetaldehyde, acetic acid, and synthetic rubber, but it is also commonly used as a reducing agent, bactericide, and in the preparation of standard solutions for the determination of aldehydes by recolorimetry. Acetaldehyde distillation is a common separation process in chemical production, used to improve the purity and recovery efficiency of acetaldehyde products.

[0003] A search revealed that the document with publication number "CN212680105U" mentions that "this utility model relates to the field of pharmaceutical equipment technology, and in particular to a distillation apparatus, including a support, a reaction vessel mounted on the support, a cover plate on the reaction vessel, a feed inlet, a connecting flange for connecting to a distillation column, a temperature measuring instrument, and a stirring port. A stirring device is installed at the stirring port, and the stirring device includes a motor located above the reaction vessel, the output end of the motor facing the reaction vessel and connected to a geared motor, and the output end of the geared motor connected to a stirring shaft located inside the reaction vessel." This apparatus uses a stirring arm to prevent material caking inside the reaction vessel, improving distillation efficiency and facilitating cleaning. However, existing distillation apparatuses are usually a single unit; although some internal cleaning structures are incorporated, thorough cleaning is still difficult, leading to impurity accumulation over long-term use, which can affect the quality of acetaldehyde.

[0004] To address these issues, we provide an acetaldehyde distillation apparatus. Utility Model Content

[0005] The purpose of this invention is to provide an acetaldehyde distillation apparatus to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an acetaldehyde distillation apparatus, comprising a primary heating tank and a staged distillation mechanism, wherein the staged distillation mechanism is disposed above the primary heating tank;

[0007] The staged distillation mechanism includes a heating component and a disassembly and filtration component. The heating component is installed at the bottom of the first-stage heating tank, and the disassembly and filtration component is installed above the first-stage heating tank.

[0008] Preferably, the heating assembly includes a feed pipe and an electrically controlled heater. The feed pipe is provided at the right end of the primary heating tank, and the electrically controlled heater is installed at the bottom of the interior of the primary heating tank. The surface of the electrically controlled heater is provided with a raised ring.

[0009] Preferably, the disassembled filter assembly includes a secondary heating tank, a threaded connecting ring, a mounting ring, a filter screen, a snap-fit ​​block, a snap-fit ​​groove, a flow-concentrating plate, and a discharge port. The secondary heating tank is disposed above the primary heating tank, and a threaded connecting ring is disposed on the outer side of the bottom end of the secondary heating tank.

[0010] Preferably, an installation ring is installed on the inner side of the bottom of the secondary heating tank, and a filter screen is installed on the inner side of the installation ring. The filter screen is made of stainless steel.

[0011] Preferably, the mounting ring has snap-fit ​​blocks at both ends, and the inner wall of the secondary heating tank has snap-fit ​​grooves.

[0012] Preferably, a flow-concentrating plate is provided on the inner side of the secondary heating tank, and a discharge port is installed on the left side of the secondary heating tank.

[0013] Preferably, a reheating assembly is provided above the flow-concentrating plate. The reheating assembly includes a secondary heater, an air inlet, and a collection tank. The secondary heater is installed above the flow-concentrating plate, and an air inlet is provided on the outer side of the secondary heater. The collection tank is threadedly connected to the upper part of the secondary heater.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. Through the staged distillation mechanism, acetaldehyde to be distilled is added to the primary heating tank through the feed pipe. An electrically controlled heater heats the acetaldehyde to facilitate distillation. Simultaneously, raised rings on the surface increase the contact area with the acetaldehyde, ensuring uniform heating. A threaded connection ring connects to the secondary heating tank, facilitating disassembly and assembly, and enabling cleaning of the tank interior to prevent impurity accumulation. A filter screen filters the acetaldehyde gas, preventing direct flow of upper acetaldehyde and avoiding direct mixing between the two heating tanks, which could affect the quality of the acetaldehyde. A flow-collecting plate further concentrates the acetaldehyde gas, which is then collected through the outlet, increasing the convenience of acetaldehyde gas collection.

[0016] 2. By setting up the reheating component, acetaldehyde that needs to be refined is added again to the secondary heater. At the same time, some of the acetaldehyde gas that is not completely collected will enter the area above the flow collector and enter the acetaldehyde liquid in the secondary heater through the air inlet, increasing the gas-liquid contact area and improving the mass transfer efficiency. At the same time, multiple sets of heating tanks can be installed as needed to form a multi-stage distillation structure, which can improve the distillation effect of acetaldehyde as needed. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall appearance structure proposed in this utility model;

[0018] Figure 2 This is a schematic diagram of the cooperative structure of the primary heating tank and the secondary heating tank proposed in this utility model;

[0019] Figure 3 This is a schematic diagram of the combined structure of the two-stage heating tank and the filter screen proposed in this utility model;

[0020] Figure 4 This is a schematic diagram of the overall front cross-sectional structure proposed in this utility model.

[0021] In the diagram: 1. Primary heating tank; 2. Staged distillation mechanism; 21. Heating assembly; 211. Feed pipe; 212. Electrically controlled heater; 22. Removable filter assembly; 221. Secondary heating tank; 222. Threaded connecting ring; 223. Mounting ring; 224. Filter screen; 225. Snap-fit ​​block; 226. Snap-fit ​​groove; 227. Concentrator; 228. Discharge port; 3. Reheating assembly; 31. Secondary heater; 32. Air inlet; 33. Collection tank. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Example 1

[0024] Please see Figure 1-4 As shown, an acetaldehyde distillation apparatus includes a primary heating tank 1 and a staged distillation mechanism 2, with the staged distillation mechanism 2 disposed above the primary heating tank 1.

[0025] The staged distillation unit 2 includes a heating assembly 21 and a disassembly filter assembly 22. The heating assembly 21 is installed at the bottom of the primary heating tank 1, and the disassembly filter assembly 22 is installed above the primary heating tank 1.

[0026] Furthermore, the heating assembly 21 includes a feed pipe 211 and an electrically controlled heater 212. The feed pipe 211 is provided at the right end of the primary heating tank 1, and the electrically controlled heater 212 is installed at the bottom of the interior of the primary heating tank 1. The surface of the electrically controlled heater 212 is provided with a raised ring. Acetaldehyde to be distilled is added to the primary heating tank 1 through the feed pipe 211, and heated by the electrically controlled heater 212 to distill it. At the same time, the raised ring on the surface increases the contact area with acetaldehyde, ensuring the uniformity of heating.

[0027] Furthermore, the disassembled filter assembly 22 includes a secondary heating tank 221, a threaded connecting ring 222, a mounting ring 223, a filter screen 224, a snap-fit ​​block 225, a snap-fit ​​groove 226, a flow-concentrating plate 227, and a discharge port 228. The secondary heating tank 221 is located above the primary heating tank 1. A threaded connecting ring 222 is located on the outer side of the bottom of the secondary heating tank 221. The secondary heating tank 221 is connected through the threaded connecting ring 222, which facilitates the disassembly and installation of the whole assembly, facilitates the cleaning of the inside of the tank, and avoids the accumulation of impurities.

[0028] Furthermore, an installation ring 223 is installed on the inner side of the bottom of the secondary heating tank 221, and a filter screen 224 is installed on the inner side of the installation ring 223. The filter screen 224 is made of stainless steel and filters the acetaldehyde gas through the filter screen 224. At the same time, it prevents the upper acetaldehyde from flowing down directly and prevents the acetaldehyde in the two heating tanks from mixing directly, which would affect the quality of the acetaldehyde.

[0029] Furthermore, the front and rear ends of the mounting ring 223 are provided with snap-fit ​​blocks 225, and the inner wall of the secondary heating tank 221 is provided with snap-fit ​​grooves 226. Through the snap-fit ​​cooperation between the snap-fit ​​blocks 225 and the snap-fit ​​grooves 226, the convenience of disassembling and cleaning the filter screen 224 is improved.

[0030] Furthermore, a flow-concentrating plate 227 is provided on the inner side of the secondary heating tank 221, and a discharge port 228 is installed on the left side of the secondary heating tank 221. The flow-concentrating plate 227 makes it easier for acetaldehyde gas to gather, and then it is collected through the discharge port 228, which increases the convenience of acetaldehyde gas collection.

[0031] Example 2

[0032] Please see Figure 1 , Figure 2 and Figure 4As shown in the comparative embodiment one, as another implementation of this utility model, a reheating component 3 is provided above the flow-concentrating plate 227. The reheating component 3 includes a secondary heater 31, an air inlet 32, and a collection tank 33. The secondary heater 31 is installed above the flow-concentrating plate 227, and the air inlet 32 ​​is opened on the outer side of the secondary heater 31. The collection tank 33 is threadedly connected to the upper part of the secondary heater 221. Acetaldehyde that needs to be refined can be added again to the secondary heater 31. At the same time, some of the acetaldehyde gas that is not completely collected will enter the upper part of the flow-concentrating plate 227 and enter the acetaldehyde liquid in the secondary heater 31 through the air inlet 32, increasing the gas-liquid contact area and improving the mass transfer efficiency. At the same time, multiple sets of heating tanks can be installed as needed to form a multi-stage distillation structure, which can improve the distillation effect of acetaldehyde as needed.

[0033] Working Principle: In use, firstly, install the device at the desired location. Then, add the acetaldehyde to be distilled into the primary heating tank 1 through the feed pipe 211. The electrically controlled heater 212 heats the acetaldehyde to facilitate distillation. Simultaneously, the raised rings on the surface increase the contact area with the acetaldehyde, ensuring uniform heating. Secondly, connect the secondary heating tank 221 via the threaded connecting ring 222, facilitating disassembly and assembly, and enabling cleaning of the tank interior to prevent impurity accumulation. Simultaneously, the acetaldehyde gas is filtered through the filter screen 224, preventing the upper layer of acetaldehyde from flowing directly down and preventing direct flow of acetaldehyde between the two heating tanks. The mixing of acetaldehyde gas with other components affects its quality. The third step involves using a flow-concentrating plate 227 to facilitate gas aggregation, followed by collection through the outlet 228, increasing the convenience of acetaldehyde gas collection. The fourth step involves adding the required acetaldehyde to the secondary heater 31 again. Simultaneously, some of the incompletely collected acetaldehyde gas enters above the flow-concentrating plate 227 and enters the liquid acetaldehyde in the secondary heater 31 through the inlet 32, increasing the gas-liquid contact area and improving mass transfer efficiency. Multiple heating tanks can be installed as needed to form a multi-stage distillation structure, improving the acetaldehyde distillation effect as required. This completes the use of an acetaldehyde distillation device.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An acetaldehyde distillation apparatus, comprising a primary heating tank (1) and a staged distillation mechanism (2), characterized in that, A staged distillation mechanism (2) is provided above the primary heating tank (1); The staged distillation mechanism (2) includes a heating assembly (21) and a disassembly filter assembly (22). The heating assembly (21) is installed at the bottom of the primary heating tank (1), and the disassembly filter assembly (22) is installed above the primary heating tank (1).

2. The acetaldehyde distillation apparatus according to claim 1, characterized in that, The heating assembly (21) includes a feed pipe (211) and an electric heater (212). The feed pipe (211) is provided at the right end of the primary heating tank (1). The electric heater (212) is installed at the bottom of the interior of the primary heating tank (1). The surface of the electric heater (212) is provided with a raised ring.

3. The acetaldehyde distillation apparatus according to claim 1, characterized in that, The disassembled filter assembly (22) includes a secondary heating tank (221), a threaded connecting ring (222), a mounting ring (223), a filter screen (224), a snap-fit ​​block (225), a snap-fit ​​groove (226), a flow-concentrating plate (227), and a discharge port (228). The secondary heating tank (221) is provided above the primary heating tank (1), and a threaded connecting ring (222) is provided on the outer side of the bottom end of the secondary heating tank (221).

4. The acetaldehyde distillation apparatus according to claim 3, characterized in that, An installation ring (223) is installed on the inner side of the bottom of the secondary heating tank (221), and a filter screen (224) is installed on the inner side of the installation ring (223). The filter screen (224) is made of stainless steel.

5. The acetaldehyde distillation apparatus according to claim 4, characterized in that, The mounting ring (223) is provided with snap-fit ​​blocks (225) at both ends, and the inner wall of the secondary heating tank (221) is provided with snap-fit ​​grooves (226).

6. The acetaldehyde distillation apparatus according to claim 3, characterized in that, The inner side of the secondary heating tank (221) is provided with a flow-concentrating plate (227), and the left side of the secondary heating tank (221) is provided with a discharge port (228).

7. The acetaldehyde distillation apparatus according to claim 6, characterized in that, A reheating assembly (3) is provided above the flow-concentrating plate (227). The reheating assembly (3) includes a secondary heater (31), an air inlet (32), and a collection tank (33). The secondary heater (31) is installed above the flow-concentrating plate (227). An air inlet (32) is provided on the outer side of the secondary heater (31). The collection tank (33) is threadedly connected to the upper part of the secondary heating tank (221).

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