A rectification column heating system

Abstract

The utility model discloses a rectifying column heating system, including rectifying column body, discharge pipe, discharge pipe, circulating pipe, heat exchanger, back material pipe, liquid distributor and corrugated board, one end of discharge pipe is connected the bottom of rectifying column body, the other end of discharge pipe is connected discharge pipe and circulating pipe respectively, the heat exchanger includes the pipe and shell course of mutual heat exchange, the circulating pipe is connected the pipe top of heat exchanger, the shell course of heat exchanger is connected with heat -conducting oil inlet pipe and heat -conducting oil outlet pipe, the liquid distributor is located the bottom of rectifying column, the quantity of corrugated board is multiple, the corrugated board vertical setting, multiple corrugated board is along the horizontal direction and is set apart each other, and multiple corrugated board is located the below of liquid distributor. This technical scheme is used to solve the uneven heating and the problem of insufficient heating efficiency of existing rectifying warming process.

Description

Technical Field

[0001] This utility model belongs to the technical field of resin production equipment, specifically relating to a distillation tower heating system. Background Technology

[0002] Isobornyl acetate, an important fine chemical, is widely used in fragrances, coatings, and other fields, playing a key role in formulating floral and fruity fragrances and improving the film-forming properties of coatings. Currently, in industry, isobornyl acetate is commonly prepared by esterification of camphene and acetic acid under the action of a solid acid catalyst. After the reaction, the resulting reaction solution contains unreacted camphene, acetic acid, and byproducts. To obtain isobornyl acetate products that meet quality requirements, the reaction solution needs to be separated by heated distillation.

[0003] Traditional distillation heating processes employ steam heating via an internal heating coil in the distillation column. However, this method has significant drawbacks. Firstly, uneven heating is prone to occur during the process, and locally excessively high temperatures can induce polymerization reactions in the material, generating more byproducts and reducing the purity and yield of isobornyl acetate. Secondly, during prolonged heating, polymers continuously adhere to the outer surface of the heating coil, forming an insulating layer that severely reduces heating efficiency, increases energy consumption, shortens equipment lifespan, and raises maintenance costs, ultimately hindering the efficient and stable production of isobornyl acetate. Utility Model Content

[0004] To address the aforementioned technical problems, this utility model provides a distillation column heating system to solve the problems of uneven heating and insufficient heating efficiency in existing distillation heating processes. This distillation column heating system can effectively improve the heating efficiency of materials and simultaneously improve the distillation efficiency.

[0005] This utility model discloses a distillation column heating system, including a distillation column body, a discharge pipe, a feed pipe, a circulation pipe, a heat exchanger, a return pipe, a distributor, and corrugated plates. One end of the discharge pipe is connected to the bottom of the distillation column body, and the other end of the discharge pipe is connected to the feed pipe and the circulation pipe respectively. The heat exchanger includes a tube side and a shell side for mutual heat exchange. The circulation pipe is connected to the top of the tube side of the heat exchanger. The shell side of the heat exchanger is connected to a heat transfer oil inlet pipe and a heat transfer oil outlet pipe. The distributor is located at the bottom of the distillation column body. There are multiple corrugated plates, which are vertically arranged and spaced apart horizontally. The multiple corrugated plates are located below the distributor. One end of the return pipe is connected to the bottom of the tube side of the heat exchanger, and the other end of the return pipe extends into the interior of the distillation column body and connects to the distributor.

[0006] Optionally, a pump body is provided on the discharge pipe.

[0007] Optionally, a first control valve is provided on the discharge pipe, and a second control valve is provided on the circulation pipe.

[0008] The distillation column heating system utilizes a heat exchanger to indirectly heat the material drawn from the bottom of the distillation column within the tube side by circulating heat transfer oil in the shell side. Compared to traditional steam heating with heating coils in the reboiler, this structure avoids direct contact between the heating coils and the material, reducing the likelihood of polymers adhering to the heating element surface and forming an insulating layer, thus effectively improving heating efficiency and reducing energy consumption. Simultaneously, the material enters the heat exchanger tube side through a circulation pipe, undergoes uniform heating, and is then redistributed to the bottom of the distillation column by a distributor connected to the return pipe. Multiple vertically and horizontally spaced corrugated plates increase the contact area between the material and air, promoting the separation of low-boiling-point substances after heating, thereby improving the purity and yield of isobornyl acetate. Furthermore, reducing polymer adhesion to the heating element surface extends the equipment's service life, lowers maintenance costs, and facilitates the efficient and stable production of isobornyl acetate. Attached Figure Description

[0009] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0010] Figure 1 This is a schematic diagram of a distillation column heating system. Detailed Implementation

[0011] This utility model discloses a distillation column heating system, which can effectively improve the heating efficiency of materials and improve the distillation efficiency.

[0012] The technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, what is described is only a part of the embodiments of this utility model, and not all of the embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0013] See Figure 1As shown, this utility model discloses a distillation column heating system, including a distillation column body 11, a discharge pipe 6, a feed pipe 2, a circulation pipe 1, a heat exchanger 10, a return pipe 14, a distributor 8, and a corrugated plate 7. One end of the discharge pipe 6 is connected to the bottom of the distillation column body 11, and the other end of the discharge pipe 6 is connected to the feed pipe 2 and the circulation pipe 1, respectively. The heat exchanger 10 includes a tube side and a shell side for mutual heat exchange. The circulation pipe 1 is connected to the top of the tube side of the heat exchanger 10. The shell side of the heat exchanger 10 is connected to a heat transfer oil inlet pipe 12 and a heat transfer oil outlet pipe 13. The distributor 8 is located at the bottom of the distillation column body. There are multiple corrugated plates 7, which are vertically arranged and spaced apart from each other in the horizontal direction. The multiple corrugated plates 7 are located below the distributor 8. One end of the return pipe 14 is connected to the bottom end of the tube side of the heat exchanger 10, and the other end of the return pipe 14 extends into the interior of the distillation column body 11 and is connected to the distributor 8.

[0014] The distillation column heating system utilizes a heat exchanger 10 to indirectly heat the material drawn from the bottom of the distillation column body 11 within the tube side by circulating heat transfer oil in the shell side of the heat exchanger 10. Compared to traditional steam heating methods using heating coils in the reboiler, this structure avoids direct contact between the heating coils and the material, reducing the likelihood of polymers adhering to the heating element surface and forming an insulating layer, thereby effectively improving heating efficiency and reducing energy consumption. Simultaneously, the material enters the tube side of the heat exchanger 10 through the circulation pipe 1. After uniform heating, it is redistributed to the bottom of the distillation column body 11 by the distributor 8 connected to the return pipe 14. Multiple vertically and horizontally spaced corrugated plates 7 increase the contact area between the material and air, promoting the separation of low-boiling-point substances after heating, thus improving the purity and yield of isobornyl acetate. Furthermore, reducing polymer adhesion to the heating element surface extends the equipment's service life, lowers maintenance costs, and facilitates the efficient and stable production of isobornyl acetate.

[0015] A pump body 5 is installed on the discharge pipe 6.

[0016] The discharge pipe 2 is equipped with a first control valve 3, and the circulation pipe 1 is equipped with a second control valve 4.

[0017] The first control valve 3 installed on the discharge pipe 2 and the second control valve 4 installed on the circulation pipe 1 can flexibly control the flow direction and flow rate of materials according to actual production needs. When it is necessary to discharge part of the material (such as separated by-products), the discharge rate can be controlled by adjusting the first control valve 3; when it is necessary to adjust the amount of material entering the heat exchanger 10 for heating and circulation, it can be achieved by adjusting the second control valve 4. This flexible control method can better adapt to different production conditions, optimize the operating parameters of the distillation column, improve the controllability of the production process, help improve the production quality and efficiency of isobornyl acetate, and at the same time avoid unnecessary material waste and energy consumption.

[0018] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.

Claims

1. A distillation column heating system, characterized in that, The distillation column includes a main body, a discharge pipe, a feed pipe, a circulation pipe, a heat exchanger, a return pipe, a distributor, and corrugated plates. One end of the discharge pipe is connected to the bottom of the main body, and the other end is connected to both the feed pipe and the circulation pipe. The heat exchanger includes a tube side and a shell side for mutual heat exchange. The circulation pipe is connected to the top of the tube side of the heat exchanger. The shell side of the heat exchanger is connected to a heat transfer oil inlet pipe and a heat transfer oil outlet pipe. The distributor is located at the bottom of the main body. There are multiple corrugated plates, which are vertically arranged and spaced apart horizontally. The multiple corrugated plates are located below the distributor. One end of the return pipe is connected to the bottom of the tube side of the heat exchanger, and the other end extends into the main body of the distillation column and connects to the distributor.

2. The distillation column heating system according to claim 1, characterized in that, A pump body is installed on the discharge pipe.

3. The distillation column heating system according to claim 1, characterized in that, The discharge pipe is equipped with a first control valve, and the circulation pipe is equipped with a second control valve.

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