Solvent separation device for acrylic acid production

Abstract

The utility model discloses a solvent separation device for acrylic acid production, which relates to the technical field of solvent separation and comprises a bottom plate, a distillation tower is fixedly mounted on the upper surface of the bottom plate, a first support plate and a second support plate are fixedly mounted on the inner wall of the distillation tower, and the second support plate is positioned below the first support plate. A plurality of through grooves are formed in the upper surface of the first supporting plate and the upper surface of the second supporting plate, the through grooves are circumferentially distributed about the center line of the distillation tower, an observation pipe is arranged between the first supporting plate and the second supporting plate, and the observation pipe is fixedly connected with the distillation tower; the heating assembly heats water flow and conveys the water flow into the heat preservation cavity through the first gear and the second gear in the connecting plate, so that water bath heating is carried out on mixed liquid in the distillation tower, other external liquid is prevented from entering the distillation tower, meanwhile, it is ensured that the mixed liquid is always kept at the proper temperature, and the separation speed of the mixed liquid is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of solvent separation, in particular to a solvent separation device for acrylic acid production. Background Art

[0002] Acrylic acid is an organic compound, the simplest unsaturated fatty acid, with the chemical formula C3H4O2. It is a colorless liquid with a pungent odor at room temperature and pressure, and is easily soluble in water (miscible), ethanol, ether, etc. Since it contains unsaturated bonds in its structure, its chemical properties are relatively active, and it is easy to polymerize in the air. It can undergo reduction reactions with hydrogen, esterification reactions with alcohols, and addition reactions with hydrogen halides.

[0003] When performing preliminary solvent separation in acrylic acid production, direct steam heating is usually used to heat the mixed solution in the distillation tower. During the heating process, a large amount of water will be introduced, which will reduce the separation rate. At the same time, the steam heating temperature is relatively high, generally higher than 100°C, which causes part of the acrylic acid to evaporate. The evaporated acrylic acid leaves the equipment with the steam, resulting in material waste. Utility Model Content

[0004] In order to solve the above technical problems, a solvent separation device for acrylic acid production is provided, which solves the above problems of reduced separation speed and material waste.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A solvent separation device for acrylic acid production comprises a bottom plate, a distillation tower is fixedly mounted on the upper surface of the bottom plate, a first support plate and a second support plate are fixedly mounted on the inner wall of the distillation tower, and the second support plate is located below the first support plate, a plurality of through grooves are provided on the upper surfaces of the first support plate and the second support plate, and the plurality of through grooves are distributed circumferentially about the center line of the distillation tower, an observation tube is provided between the first support plate and the second support plate, and the observation tube is fixedly connected to the distillation tower, a heat preservation chamber is provided inside the distillation tower, a heating assembly is provided outside the distillation tower, and the heating assembly is connected to the heat preservation chamber through a water inlet pipe and a water outlet pipe.

[0007] Preferably, a first discharge pipe is fixedly installed at the center of the bottom surface of the base plate, and the first discharge pipe is connected to the distillation tower, the outer surface of the distillation tower corresponding to the second support plate is connected to the second discharge pipe, and the outer surface of the distillation tower corresponding to the first support plate is connected to the feed pipe.

[0008] Preferably, the heating assembly includes a heating box, a spiral plate is fixedly installed on the bottom of the inner wall of the heating box, a heating film is fixedly installed on the outer surface of the spiral plate, an air outlet pipe is fixedly installed on the upper surface of the heating box corresponding to the spiral plate, the air outlet pipe is connected to the heating box, and a one-way valve is fixedly installed inside the air outlet pipe, the water outlet pipe extends to the interior of the heating box, and the water inlet pipe is connected to the side of the heating box.

[0009] Preferably, a connecting plate is fixedly installed inside the water outlet pipe, a chamber is opened inside the connecting plate, a first gear and a second gear are rotatably installed on the inner wall of the chamber, and the first gear is meshingly connected with the second gear.

[0010] Preferably, a plurality of support rods are fixedly mounted on the bottom surface of the bottom plate, and the plurality of support rods are distributed circumferentially about the center line of the bottom plate.

[0011] Preferably, a regular pile of materials is arranged above the first support plate.

[0012] Preferably, a glass plate is fixedly mounted on one end of the observation tube away from the distillation tower, and the material of the glass plate is high borosilicate.

[0013] Compared with the prior art, the utility model has the following advantages: the utility model is provided with a heating component and a heat preservation chamber, and the heating component heats the water flow and transmits it to the heat preservation chamber through the first gear and the second gear in the connecting plate, so as to realize water bath heating of the mixed liquid in the distillation tower, thereby preventing other foreign liquids from entering the distillation tower, and ensuring that the mixed liquid is always maintained at a suitable temperature, thereby improving the separation speed of the mixed liquid; at the same time, due to the temperature limit of water bath heating, it is generally lower than 100°C, and the temperature at the bottom of the distillation tower is always less than or equal to the temperature to which the mixed liquid is subjected, thereby ensuring that acrylic acid will not evaporate and avoiding waste of materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0015] Figure 2 It is a three-dimensional structural schematic diagram of the utility model from another viewing angle;

[0016] Figure 3 It is a three-dimensional structural schematic diagram of the utility model from another viewing angle;

[0017] Figure 4 It is a schematic diagram of the internal structure of the utility model;

[0018] Figure 5 This is a schematic diagram of the internal structure of the heating component in the utility model;

[0019] Figure 6It is a schematic diagram of the internal structure of the connecting plate in the utility model.

[0020] The numbers in the figure are: 1. bottom plate; 2. distillation tower; 3. first support plate; 4. second support plate; 5. through groove; 6. observation tube; 7. insulation chamber; 8. heating component: 801. heating box; 802. spiral plate; 803. heating film; 804. air outlet pipe; 805. one-way valve; 9. first discharge pipe; 10. second discharge pipe; 11. feed pipe; 12. connecting plate; 13. chamber; 14. first gear; 15. second gear; 16. support rod; 17. regular stacking; 18. glass plate. DETAILED DESCRIPTION

[0021] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0022] Reference Figure 1-Figure 6 As shown, a solvent separation device for acrylic acid production includes a bottom plate 1, a distillation tower 2 is fixedly installed on the upper surface of the bottom plate 1, a first support plate 3 and a second support plate 4 are fixedly installed on the inner wall of the distillation tower 2, and the second support plate 4 is located below the first support plate 3, and the upper surfaces of the first support plate 3 and the second support plate 4 are both provided with a plurality of through grooves 5, and the plurality of through grooves 5 are distributed around the center line of the distillation tower 2, an observation tube 6 is provided between the first support plate 3 and the second support plate 4, and a staff member can observe the solvent separation status in the distillation tower 2 through the observation tube 6, and the observation tube 6 is fixedly connected to the distillation tower 2, a heat preservation chamber 7 is provided inside the distillation tower 2, and a heating component 8 is provided on the outer side of the distillation tower 2, and a heating component 8 is provided on the outer side of the distillation tower 2. Component 8 is connected to the insulation chamber 7 through an inlet pipe and an outlet pipe. When acrylic acid is prepared by redox reaction, a mixed liquid of acrylic acid, water and acetic acid is produced. The distillation tower 2 accommodates the mixed liquid. During the separation of the mixed liquid, since the molar mass of acrylic acid is greater than the molar mass of water and acetic acid, acrylic acid is located at the lower end of the distillation tower 2, and water and acetic acid are located above the acrylic acid. The water flow in the insulation chamber 7 heats the mixed liquid to increase the separation speed of the mixed liquid. At the same time, the heating component 8 maintains the temperature of the water flow in the insulation chamber 7, thereby maintaining the liquid temperature in the distillation tower 2. A temperature sensor is fixedly installed on the inner wall of the distillation tower 2 to facilitate the staff to monitor the temperature in the distillation tower 2 in real time.

[0023] like Figure 4As shown, a first discharge pipe 9 is fixedly installed at the center of the bottom surface of the bottom plate 1, and the first discharge pipe 9 is connected to the distillation tower 2, the outer surface of the distillation tower 2 corresponding to the second support plate 4 is connected to the second discharge pipe 10, and the outer surface of the distillation tower 2 corresponding to the first support plate 3 is connected to the feed pipe 11. Acrylic acid leaves the equipment through the first discharge pipe 9, and the remaining liquid leaves the equipment through the second discharge pipe 10, and the mixed liquid enters the distillation tower 2 through the feed pipe 11.

[0024] like Figure 5 As shown, the heating component 8 includes a heating box 801, a spiral plate 802 is fixedly installed at the bottom of the inner wall of the heating box 801, a heating film 803 is fixedly installed on the outer surface of the spiral plate 802, an air outlet pipe 804 is fixedly installed on the upper surface of the heating box 801 corresponding to the spiral plate 802, the air outlet pipe 804 is connected to the heating box 801, and a one-way valve 805 is fixedly installed inside the air outlet pipe 804, the water outlet pipe extends to the inside of the heating box 801, the water inlet pipe is connected to the side of the heating box 801, the water flows into the heating box 801 through the water inlet pipe, the spiral plate 802 increases the contact area between the heating film 803 and the water flow, the gas generated by heating leaves the equipment through the air outlet pipe 804, and the one-way valve 805 ensures that external gas does not enter the heating box 801, and the water outlet pipe is extended to under the liquid of the heating box 801 to prevent the gas from entering the insulation chamber 7.

[0025] like Figure 6 As shown, a connecting plate 12 is fixedly installed inside the water outlet pipe, a chamber 13 is opened inside the connecting plate 12, and a first gear 14 and a second gear 15 are rotatably installed on the inner wall of the chamber 13. The first gear 14 is meshingly connected with the second gear 15. The first gear 14 is connected to an external power source. The first gear 14 rotates to make the second gear 15 rotate at a high speed. On one side where the first gear 14 and the second gear 15 are disengaged from the meshing, the sealed volume gradually increases to form a local vacuum. Under the action of atmospheric pressure, water flows through the first gear 14 and the second gear 15 at a high speed.

[0026] like Figure 1-Figure 4 As shown, a plurality of support rods 16 are fixedly installed on the bottom surface of the base plate 1. The plurality of support rods 16 are distributed circumferentially about the center line of the base plate 1. The support rods 16 serve as connectors between the base plate 1 and the ground or the installation platform, providing a stable support foundation for the entire device. The circumferentially distributed support rods 16 form a uniform support network, which enhances the lateral displacement resistance of the base plate 1 and the stability of the overall structure. At the same time, the support rods 16 facilitate the first discharge pipe 9 to transport materials.

[0027] like Figure 4As shown, a regular pile 17 is arranged above the first support plate 3. The regular pile 17 is usually composed of specific materials, which can effectively promote the physical separation process in the mixed liquid. The regular pile 17 is arranged above the first support plate 3, so that the mixed liquid can fully contact with the pile when flowing through this area, thereby further improving the separation efficiency. The structural design of the regular pile 17 helps to optimize the distribution and flow path of the fluid. Through the action of the regular pile 17, impurities or unnecessary components in the mixed liquid can be more effectively removed, thereby improving the purity and quality of the final product. The regular pile 17 can also protect the internal structure of the distillation tower 2. A random packing is arranged above the second support plate 4 (this is the prior art and will not be described in detail here).

[0028] like Figure 1-Figure 4 As shown, a glass plate 18 is fixedly installed at one end of the observation tube 6 away from the distillation tower 2, and the material of the glass plate 18 is high borosilicate. The glass plate 18 serves as the terminal of the observation tube 6 and provides a clear observation window for the operator. Through this window, the reaction conditions, liquid level changes and fluid flow conditions inside the distillation tower 2 can be visually observed, so as to facilitate real-time monitoring and adjustment of the production process. High borosilicate glass has excellent high temperature resistance and good resistance to most chemical substances. It is not easy to react chemically with the reactants or products inside the distillation tower 2, thereby ensuring the clarity and accuracy of the observation window. Through the arrangement of the observation tube 6 and the high borosilicate glass plate 18, the operator can promptly discover abnormal conditions inside the distillation tower 2.

[0029] Working principle: The heating film in the heating component 8 heats the water flow in the heating box 801, and at the same time, the first gear 14 and the second gear 15 rotate at high speed, so that the water flow in the heating component 8 enters the insulation chamber 7. When the temperature in the distillation tower 2 reaches a certain level, the material enters the distillation tower 2 through the feed pipe 11, and the material first contacts with the regular pile 17. The regular pile 17 can effectively promote the physical separation process in the mixed liquid. After the mixed liquid is separated, acrylic acid is located in the lower layer of the liquid, and water and acetic acid are located in the upper layer of the liquid. Acrylic acid leaves the equipment through the first discharge pipe 9, and water and acetic acid leave the equipment through the second discharge pipe 10.

[0030] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and the specification only describe the principles of the utility model. The utility model may be subject to various changes and improvements without departing from the spirit and scope of the utility model. These changes and improvements fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A solvent separation device for acrylic acid production, comprising a bottom plate (1), characterized in that: A distillation tower (2) is fixedly mounted on the upper surface of the bottom plate (1); a first support plate (3) and a second support plate (4) are fixedly mounted on the inner wall of the distillation tower (2); the second support plate (4) is located below the first support plate (3); a plurality of through grooves (5) are provided on the upper surfaces of the first support plate (3) and the second support plate (4); the plurality of through grooves (5) are distributed around the center line of the distillation tower (2); an observation tube (6) is provided between the first support plate (3) and the second support plate (4); the observation tube (6) is fixedly connected to the distillation tower (2); a heat preservation chamber (7) is provided inside the distillation tower (2); a heating component (8) is provided on the outer side of the distillation tower (2); the heating component (8) is connected to the heat preservation chamber (7) through a water inlet pipe and a water outlet pipe.

2. The solvent separation device for acrylic acid production according to claim 1, characterized in that: A first discharge pipe (9) is fixedly installed at the center of the bottom surface of the bottom plate (1), and the first discharge pipe (9) is connected to the distillation tower (2); the outer surface of the distillation tower (2) corresponding to the second support plate (4) is connected to the second discharge pipe (10); and the outer surface of the distillation tower (2) corresponding to the first support plate (3) is connected to the feed pipe (11).

3. The solvent separation device for acrylic acid production according to claim 1, characterized in that: The heating assembly (8) comprises a heating box (801), a spiral plate (802) is fixedly mounted on the bottom of the inner wall of the heating box (801), a heating film (803) is fixedly mounted on the outer surface of the spiral plate (802), an air outlet pipe (804) is fixedly mounted on the upper surface of the heating box (801) corresponding to the spiral plate (802), the air outlet pipe (804) is connected to the heating box (801), and a one-way valve (805) is fixedly mounted inside the air outlet pipe (804), the water outlet pipe extends to the interior of the heating box (801), and the water inlet pipe is connected to the side of the heating box (801).

4. The solvent separation device for acrylic acid production according to claim 1, characterized in that: A connecting plate (12) is fixedly mounted inside the water outlet pipe, a chamber (13) is provided inside the connecting plate (12), a first gear (14) and a second gear (15) are rotatably mounted on the inner wall of the chamber (13), and the first gear (14) is meshingly connected with the second gear (15).

5. The solvent separation device for acrylic acid production according to claim 1, characterized in that: A plurality of support rods (16) are fixedly mounted on the bottom surface of the bottom plate (1), and the plurality of support rods (16) are distributed around the circumference of the center line of the bottom plate (1).

6. The solvent separation device for acrylic acid production according to claim 1, characterized in that: A regular pile of materials (17) is provided above the first support plate (3).

7. The solvent separation device for acrylic acid production according to claim 1, characterized in that: A glass plate (18) is fixedly mounted on one end of the observation tube (6) away from the distillation tower (2), and the material of the glass plate (18) is high borosilicate.

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