Condensing device with shunt structure for preparing glycerol triacetate

Abstract

The utility model discloses a condensing unit for preparing glycerol triacetate with a shunt structure, which comprises an esterification reaction kettle, a condensing tower, a shunt component, a water segregator and a liquid storage tower, the condensing tower is communicated with a gas phase pipe outlet of the esterification reaction kettle through the shunt component, the shunt component comprises a shunt sleeve shell and a shunt delivery pipe, and the shunt sleeve shell is communicated with the shunt delivery pipe through the water segregator. A liquid phase pipe is arranged on the water segregator, the water segregator is connected with the condensing tower through the liquid phase pipe, and the liquid storage tower is communicated and connected with the upper end of the water segregator through a pipeline. The shunting assembly firstly carries out shunting treatment on the mixed gas, so that the large-batch mixed gas is shunted into a plurality of small-batch gas flows, the heat exchange area is larger and more uniform, the condensation effect is effectively improved, and resource waste is reduced.

Description

Technical Field

[0001] This utility model relates to the field of chemical production equipment technology, specifically to a condensation device for the preparation of triacetin with a branched structure. Background Technology

[0002] Triacetin, also known as glyceryl triacetate (GTA), is a colorless, odorless, transparent, viscous oily liquid, used as an intermediate in the preparation of many fine chemical products. Its boiling point is 258–260°C, density is 1.16 g / mL, and refractive index is 1.430–1.435 at room temperature and pressure. Triacetin is miscible with most organic solvents such as ethanol, ether, benzene, and chloroform, but insoluble in mineral oil and slightly soluble in water, with a solubility of only 5.9 g / 100 mL at 25°C. It can be used as a soil hardener, a fungicide for vegetables and fruits, a fixative for fragrances, a cleaning and disinfecting agent, and a food additive. Due to its good elasticity, breathability, and suitable hardness, it is mainly used as a plasticizer in cigarette filters.

[0003] In the preparation of triacetin, the catalyst needs to be condensed and reduced by a condensation device to facilitate its reuse. A common method is to exchange heat between the mixed gas (azeotrope) and the cooling medium to cool the mixed gas, so that the gaseous catalyst in the mixed gas condenses into a liquid state, and then the liquid catalyst is collected.

[0004] Currently, mixed air is generally connected directly to the condensing equipment through pipelines. A large amount of mixed air enters the condensing equipment to react, resulting in a limited heat exchange area and a slow heat exchange rate. This reduces the condensing effect of the entire condensing device, leading to wasted resources and increased production costs. Summary of the Invention

[0005] To address the aforementioned problems, this invention provides a condensation device for the preparation of triacetin with high heat exchange efficiency, reliable performance, and a branched structure.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a condensation device for the preparation of triacetin with a branching structure, comprising an esterification reactor, a condensation tower, a branching assembly, a water separator, and a liquid storage tower.

[0007] A gas phase pipe is installed on the top surface of the esterification reactor. The condenser has an inlet at the top and an outlet at the bottom, and is located on one side of the esterification reactor. The condenser is connected to the outlet of the gas phase pipe of the esterification reactor through a branching assembly. The branching assembly includes a branching shell and a branching conveying pipe. The branching shell is a split structure, consisting of an upper shell and a lower shell sealed together. The upper shell is a hollow cylinder structure with a closed top and an open bottom. A connecting pipe is installed in the middle of the top surface of the upper shell and is connected to the gas phase pipe of the esterification reactor through this connecting pipe. The lower shell is a hollow cylinder structure with an open top and a closed bottom. An interface is opened on the bottom surface of the lower shell, with 3-5 interfaces arranged in a ring array with the center of the bottom surface of the lower shell as the midpoint. The number of branching conveying pipes is the same as the number of interfaces on the bottom surface of the lower shell and is connected to them. The other end of the branching conveying pipe extends into the condenser and is connected to the condensation assembly inside the condenser.

[0008] The number of condensing components is the same as the number of branch delivery pipes. They are fixedly connected to the tower wall, and the center of the bottom surface of each condensing component is the midpoint. They are arranged in a ring array inside the condensing tower. The condensing components include umbrella-shaped distributors, branch condensing pipes, and collecting trays. The top of the umbrella-shaped distributor is connected to the branch delivery pipe of the branching component, and 3-6 evenly distributed connecting pipes are opened on the bottom surface. The branch condensing pipes are spiral coil structures, and their number is the same as the number of connecting pipes on the bottom surface of the umbrella-shaped distributor, and they are connected to it. The collecting tray is located below the branch condensing pipes, and its top surface is connected to the branch condensing pipes. A drain pipe is installed on its bottom surface.

[0009] The water separator is equipped with a liquid phase pipe, and a collection hood is installed at the inlet end of the liquid phase pipe. The collection hood is a hopper structure, with its bottom surface connected to the liquid phase pipe and its top surface equipped with a collection pipe. The number of collection pipes is the same as the number of condensation components, and they are sequentially connected to the drain pipe at the bottom of the collection plate of the condensation components.

[0010] The liquid storage tower is connected to the upper end of the water separator via a pipeline, and the upper end of the liquid storage tower is also connected to the esterification reactor via a reflux pipe.

[0011] As an optimized solution for this case, in order to save water resources and facilitate recycling, a circulation tower is provided on one side of the condensing tower. The water inlet pipe of the circulation tower is connected to the water outlet of the condensing tower, and the drain pipe is connected to the water inlet of the condensing tower. A cold air fan is installed on one side of the circulation tower. The cold air fan is connected to the circulation tower through an air blowing pipe. The air blowing pipe is divided into a connecting section and an air blowing section. The connecting section is located outside the circulation tower, and the air blowing section extends vertically into the tower from the top. The air blowing section has multiple air blowing holes arranged at equal intervals on its pipe body.

[0012] Furthermore, a demister is installed inside the exhaust port of the circulation tower.

[0013] As an optimized solution for this case, in order to ensure uniform heat exchange of the mixed gas in each condensation component, the condensation components in the condensation tower are positioned at the same horizontal level within the tower.

[0014] Beneficial effects: This utility model combines an esterification reactor, a condenser tower, a distribution assembly, a water separator, and a storage tower. When condensing a mixed gas, the distribution assembly first divides the mixed gas into multiple small streams, making the heat exchange area larger and more uniform, effectively improving the condensation effect, reducing resource waste, and lowering production costs. Furthermore, by setting multiple distribution condenser tubes, the azeotrope is continuously divided into several fine streams, further improving the condensation effect. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the present invention in Embodiment 1.

[0016] Figure 2 This is a schematic diagram of the branching component and condenser tower in this utility model.

[0017] Figure 3 This is a schematic diagram of the condenser assembly in this utility model.

[0018] Figure 4 This is a schematic diagram of the structure of the present invention in Embodiment 2.

[0019] Figure 5 This is a schematic diagram of the circulation tower in this utility model.

[0020] Figure 6 This is a schematic diagram of the arrangement structure of the interfaces on the bottom surface of the lower shell in this utility model.

[0021] In the diagram: 1. Esterification reactor; 2. Condensation tower; 3. Water separator; 4. Liquid storage tower; 5. Gas phase pipe; 6. Upper shell; 7. Lower shell; 8. Branch delivery pipe; 9. Umbrella-shaped distributor; 10. Branch condenser pipe; 11. Collection tray; 12. Liquid phase pipe; 13. Reflux pipe; 14. Circulation tower; 15. Air cooler; 16. Air blowing pipe; 17. Demister; 18. Collection hood. Detailed Implementation

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

[0023] Identical components are represented by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to directions in the accompanying drawings, while the terms "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively. Furthermore, the accompanying drawings are all in a very simplified form, using non-precise ratios, and are only used to facilitate and clearly illustrate the purpose of the embodiments of this utility model. Example 1

[0024] See Figure 1-3 and Figure 6 This embodiment discloses a condensation apparatus for preparing triacetin with a branched structure, used for the preparation of...

[0025] The process involves condensing and separating the water-carrying azeotrope generated from triacetin, specifically including an esterification reactor 1, a condensation tower 2, a distribution assembly, a water separator 3, and a storage tower 4.

[0026] See Figure 1 The esterification reactor 1 is equipped with a gas phase pipe 5 on its top surface. The condenser tower 2 has a water inlet at its upper part and a water outlet at its lower part, and is located on one side of the esterification reactor 1. The condenser tower 2 is connected to the outlet of the gas phase pipe 5 of the esterification reactor 1 via a branching assembly. (See [reference]). Figure 2 The branching assembly includes a branching housing and a branching conveying pipe 8. The branching housing is a split structure, consisting of an upper shell 6 and a lower shell 7 sealed together. The upper shell 6 is a hollow cylindrical structure with a closed top and an open bottom. A connecting pipe is installed in the middle of the top surface of the upper shell 6, and this connecting pipe connects to the gas phase pipe 5 of the esterification reactor 1. The lower shell 7 is a hollow cylindrical structure with an open top and a sealed bottom. Figure 6 It can be seen that there are three interfaces on the bottom surface of the lower shell, and they are arranged in a ring array with the center of the bottom surface of the lower shell as the midpoint. The number of branch conveying pipes 8 is the same as the number of interfaces on the bottom surface of the lower shell 7, and they are connected to each other. The other end of the branch conveying pipes 8 extends into the condensation tower 2 and is connected to the condensation components in the condensation tower 2.

[0027] See Figure 2 and Figure 3The number of condensing components is the same as the number of branch delivery pipes 8. They are fixedly connected to the tower wall, and the center of the bottom surface of each condensing component is the midpoint. They are arranged in a ring array inside the condensing tower 2. The condensing components include umbrella-shaped distributors 9, branch condensing pipes 10, and collecting trays 11. The top of the umbrella-shaped distributor 9 is connected to the branch delivery pipes 8 of the branching components, and three evenly distributed connecting pipes are opened on the bottom end face. The branch condensing pipes 10 are spiral coil structures, and their number is the same as the number of connecting pipes on the bottom end face of the umbrella-shaped distributor 9, and they are connected to it. The collecting tray 11 is located below the branch condensing pipes 10, and its top surface is connected to the branch condensing pipes 10. A drain pipe is installed on its bottom surface.

[0028] from Figure 1 It can be seen that a liquid phase pipe 12 is installed on the water separator 3, and a collection cover 18 is installed on the inlet end of the liquid phase pipe 12. The collection cover 18 is a hopper structure, and its bottom surface is connected to the liquid phase pipe 12. A collection pipe is installed on its top surface. The number of collection pipes is the same as the number of condensation components, and they are connected in sequence to the drain pipe on the bottom surface of the collection plate 11 of the condensation components.

[0029] See Figure 1 The liquid storage tower 4 is connected to the upper end of the water separator 3 via a pipeline, and the upper end of the liquid storage tower 4 is also connected to the esterification reactor 1 via a reflux pipe 13. Example 2

[0030] See Figure 2-5 The specific structure and implementation method are as shown in Example 1, with the difference being: see Figure 4 A circulation tower 14 is provided on one side of the condenser tower 2. The inlet pipe of the circulation tower 14 is connected to the outlet of the condenser tower 2, and the drain pipe is connected to the inlet of the condenser tower 2. Figure 4 and Figure 5 It can be seen that a cooler 15 is installed on one side of the circulation tower 14. The cooler 15 is connected to the circulation tower 14 through the air blowing pipe 16 to blow air. The air blowing pipe 16 is divided into a connecting section and an air blowing section. The connecting section is located outside the circulation tower 14, and the air blowing section is vertically inserted into the tower from the top of the circulation tower 14. The air blowing section has multiple air blowing holes arranged at equal intervals on its pipe body.

[0031] See Figure 5 A demister 17 is installed in the exhaust port of the circulation tower 14.

[0032] All condensing components within the condensing tower 2 are positioned horizontally within the tower.

[0033] During operation, a large amount of mixed gas enters the distribution housing of the distribution component from the esterification reactor 1 through the gas phase pipe 5. Then, it is divided into multiple fine streams by the distribution delivery pipe 8 and enters the condensation component for reaction. After passing through the umbrella-shaped distributor 9, the mixed gas enters the distribution condenser pipe 10 to exchange heat with the cold water in the condensation tower 2 for condensation. The condensed liquid is collected in the collection plate 11 and flows into the collection hood 18. Finally, it is discharged into the water distributor 3 through the liquid phase pipe 12.

[0034] During the cooling process of the condenser tower 2, the warm water that has absorbed heat in the condenser tower 2 enters the circulation tower 14 and is cooled by the blower 15. Then it is circulated back into the condenser tower 2 for cooling and heat exchange.

[0035] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A condensing device for preparing triacetin with a shunt structure, comprising an esterification reactor (1), a condensing tower (2), a shunt assembly, a water segregator (3) and a liquid storage tower (4), characterized in that: The top surface of the esterification reactor (1) is provided with a gas phase pipe (5), the upper part of the condensation tower (2) is provided with a water inlet, and the lower part is provided with a water outlet, which is arranged on one side of the esterification reactor (1), the condensation tower (2) is connected with the gas phase pipe (5) of the esterification reactor (1) through a shunt assembly, the shunt assembly comprises a shunt sleeve and a shunt conveying pipe (8), the shunt sleeve is a split structure, which is composed of an upper shell (6) and a lower shell (7) sealed connection, the upper shell (6) is a hollow cylindrical structure with a closed top surface and an open bottom surface, a connecting pipe is arranged on the top surface of the upper shell (6), and the connecting pipe is connected with the gas phase pipe (5) of the esterification reactor (1), the lower shell (7) is a hollow cylindrical structure with an open top surface and a closed bottom surface, a plurality of interfaces are arranged on the bottom surface of the lower shell, and the number of the interfaces is 3-5, and the interfaces are arranged in a circular array with the center of the bottom surface of the lower shell as the midpoint, the number of the shunt conveying pipe (8) is the same as that of the interfaces on the bottom surface of the lower shell, and the shunt conveying pipe (8) is connected with the interfaces, one end of the shunt conveying pipe (8) extends into the condensation tower (2) and is connected with the condensation assembly in the condensation tower (2); The number of the condensation assembly is the same as that of the shunt conveying pipe (8), the condensation assembly is connected with the tower wall, and the center of the bottom surface of each condensation assembly is the midpoint, which is arranged in a circular array in the condensation tower (2), the condensation assembly comprises an umbrella-shaped diverter (9), a shunt condensation pipe (10) and a collecting disc (11), the top end of the umbrella-shaped diverter (9) is connected with the shunt conveying pipe (8) of the shunt assembly, and three evenly distributed connecting pipes are arranged on the bottom end surface of the umbrella-shaped diverter (9), the shunt condensation pipe (10) is a spiral coil structure, the number of the shunt condensation pipe (10) is the same as that of the connecting pipes on the bottom end surface of the umbrella-shaped diverter (9), and the shunt condensation pipe (10) is connected with the connecting pipes, the collecting disc (11) is located below the shunt condensation pipe (10), the top surface of the collecting disc (11) is connected with the shunt condensation pipe (10), and the bottom surface of the collecting disc (11) is provided with a drain pipe; The liquid phase pipe (12) is arranged on the water distributor (3), a collecting cover (18) is arranged on the inlet end of the liquid phase pipe (12), the collecting cover (18) is a hopper structure, the bottom surface of the collecting cover (18) is connected with the liquid phase pipe (12), and the top surface of the collecting cover (18) is provided with a collecting pipe, the number of the collecting pipe is the same as that of the condensation assembly, and the collecting pipe is connected with the drain pipe on the bottom surface of the collecting disc (11) of the condensation assembly in sequence; The liquid storage tower (4) is connected with the upper end of the water distributor (3) through a pipeline, and the upper end of the liquid storage tower (4) is also connected with the esterification reactor (1) through a reflux pipe (13).

2. A condensing apparatus for the preparation of triacetin with a shunt structure according to claim 1, characterized in that: A circulating tower (14) is arranged on one side of the condensation tower (2), the water inlet pipe of the circulating tower (14) is connected with the water outlet of the condensation tower (2), the water outlet pipe of the circulating tower (14) is connected with the water inlet of the condensation tower (2), a cold air blower (15) is arranged on one side of the circulating tower (14), the cold air blower (15) is connected with the circulating tower (14) through a blowing pipe (16) to blow air into the circulating tower (14), the blowing pipe (16) is divided into a connecting section and a blowing section, the connecting section is located outside the circulating tower (14), the blowing section vertically penetrates into the circulating tower (14) from the upper part of the circulating tower (14), and a plurality of equidistant blowing holes are arranged on the blowing section.

3. A condensing apparatus for the preparation of triacetin with a shunt structure according to claim 2, characterized in that: A demister (17) is installed in the exhaust port of the circulation column (14).

4. A condensing device for the preparation of tritriciylglycerol with a split flow, according to any one of claims 1-3, characterized in that: The horizontal positions of the condensing components in the condensing column (2) are the same.

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