A carbon emission reduction rectification device

Abstract

The utility model relates to the technical field of chemical rectification, especially to reduce carbon emission rectification device, including tower body, the one side of the middle part of tower body is equipped with raw material feed inlet, the top of tower body is equipped with gas phase export, the one side of the top of tower body is equipped with reflux port, the bottom of tower body is equipped with tower kettle export, the one side of tower kettle is equipped with tower kettle back mouth, heat exchanger is connected between gas phase export and reflux port, the top of gas phase export is connected with heat utilization mechanism and heat exchanger through three -phase pipe, the tower kettle export and tower kettle back mouth are connected with reboiler, heat utilization mechanism and reboiler are connected through the pipeline. The device can be used for chemical rectification operation, can carry out heat recovery with reboiler to the hot steam of rectification tower top, improves the heat recovery utilization of high pressure tower itself, thereby reduces the carbon emission of high pressure tower itself, to realize the heat recovery utilization and carbon emission reduction of rectification equipment.

Description

Technical Field

[0001] This utility model relates to the field of chemical distillation technology, specifically to a distillation device for reducing carbon emissions. Background Technology

[0002] Conventional distillation methods are often ineffective in separating azeotropic systems. While extractive distillation and azeotropic distillation can both separate azeotropic systems, they introduce additional extractants or azeotropic agents, which can affect reuse and, in large quantities, cause secondary pollution.

[0003] Chinese utility model patent CN216170035U discloses a distillation apparatus, which includes "a fourth loop that refluxes from the second top outlet and the first reboiler back to the top of the high-pressure tower; and a fifth loop that refluxes from the second top outlet and the first reboiler back to the low-pressure tower". This apparatus only uses the top of the high-pressure tower and the bottom of the low-pressure tower to form a loop to ensure heat recovery between the high-pressure tower and the low-pressure tower, but the heat recovery and utilization of the high-pressure tower itself is insufficient. Utility Model Content

[0004] The purpose of this invention is to provide a carbon emission reduction distillation device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a carbon emission reduction distillation device, comprising a column body, wherein a raw material inlet is provided through one side of the middle part of the column body;

[0006] The top of the tower body is provided with a gas phase outlet, a reflux port is provided through one side of the top of the tower body, the bottom of the tower body is provided with a reboiler outlet, and a reboiler return port is provided through one side of the reboiler.

[0007] A heat exchanger is connected between the gas phase outlet and the reflux port. The top of the gas phase outlet is connected to the heat exchanger and the heat utilization mechanism via a three-phase pipe. A reboiler is connected between the tower bottom outlet and the tower bottom reflux port. The heat utilization mechanism is connected to the reboiler via a pipeline.

[0008] The beneficial effects of this utility model are as follows: with the combination of gas supply pipe, compressor, gas transmission pipe, gas phase outlet, tower body, and tower bottom return port, the heat of the low temperature steam at the top of the tower can be pumped to the tower bottom with a higher temperature under the action of the compressor as a heat source, so as to realize the heat utilization of the distillation tower itself and achieve the purpose of reducing carbon emissions.

[0009] To achieve the distillation function of the distillation column and ensure the quality of the distillation:

[0010] The column is further configured such that: the interior of the column body has several trays arranged about the central axis, and the column body is divided into a rectification section and a stripping section about the feed inlet; the column body above the feed inlet is the rectification section, and the column body below the feed inlet is the stripping section; the vapor outlet and reflux outlet are located in the rectification section, and the reboiler outlet and reboiler reflux outlet are located in the stripping section.

[0011] By adopting the above technical solution, the distillation column design in the rectification section and stripping section ensures complete rectification of the distillation column.

[0012] To achieve condensation and heat recovery of the product at the vapor outlet of the distillation column:

[0013] The heat exchanger is further configured such that: the heat exchanger includes a heat exchanger shell, and a hot medium inlet is provided through the top of one side of the heat exchanger shell, and a cold medium inlet is provided through the top of the other side of the heat exchanger shell; a baffle is provided at the central axis of the heat exchanger shell; a hot medium outlet is provided symmetrically about the central axis of the heat exchanger shell about the hot medium inlet; and a cold medium outlet is provided on the same side of the heat medium outlet about the same side of the heat medium outlet about the heat exchanger shell; the hot medium inlet, cold medium inlet, hot medium outlet and cold medium outlet can be constructed as a tube sheet structure, and the hot medium outlet and the return port form a T-shaped pipeline.

[0014] By adopting the above technical solution, the vapor exit product at the top of the distillation column is condensed and its heat is recovered and utilized, ensuring heat recovery while reducing carbon emissions.

[0015] To achieve heat recovery and utilization in distillation columns:

[0016] The heat utilization mechanism is further configured such that: the gas supply pipe is connected to the gas phase outlet and the heat medium inlet through a three-way pipe; one end of the gas supply pipe is connected to a compressor; the other end of the compressor is connected to a gas delivery pipe; and the gas delivery pipe is connected to a reboiler; the tower body, the gas phase outlet, the gas supply pipe, the compressor, the gas delivery pipe, and the tower bottom return port constitute a loop structure.

[0017] By adopting the above technical solution, the combination of gas supply pipe, compressor, gas transmission pipe and tower bottom return port can realize the heat reuse of the lower temperature steam at the top of the tower through the loop to the higher temperature tower bottom.

[0018] To achieve liquid reboiling and vaporization, the corresponding products need to be separated:

[0019] The reboiler is further configured such that: the reboiler includes a reboiler body, and a liquid inlet is provided on one side of the bottom of the reboiler body; a gas outlet is provided on one side of the top of the reboiler body; the gas outlet and the gas delivery pipe are connected to the reboiler return port through a three-way pipe; a product outlet is provided on the bottom of the reboiler body near the liquid inlet; and the tower body, the reboiler outlet, the reboiler body, the gas outlet, and the reboiler return port constitute a loop structure.

[0020] By adopting the above technical solution, the liquid can be reheated and vaporized in the reboiler, thereby separating the light and heavy components.

[0021] The parts of the device not covered herein are the same as or can be implemented using existing technologies. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the main body of this utility model;

[0023] Figure 2 This is a front view schematic diagram of the main body of this utility model.

[0024] In the diagram: 1. Tower body; 2. Raw material inlet; 3. Gas phase outlet; 4. Reflux outlet; 5. Reboiler outlet; 6. Reboiler return outlet; 7. Heat exchanger; 701. Heat exchanger shell; 702. Hot medium inlet; 703. Cold medium inlet; 704. Hot medium outlet; 705. Cold medium outlet; 8. Heat utilization mechanism; 801. Gas supply pipe; 802. Compressor; 803. Gas transmission pipe; 9. Reboiler; 901. Reboiler body; 902. Liquid inlet; 903. Gas outlet pipe; 904. Product outlet. Detailed Implementation

[0025] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and should not be used to limit the scope of protection of the present invention in any way.

[0026] Please see Figures 1 to 2 A carbon emission reduction distillation device includes a column body 1, with a raw material inlet 2 penetrating through one side of the middle section of the column body 1;

[0027] The top of the tower body 1 is provided with a gas phase outlet 3, a reflux port 4 is provided through one side of the top of the tower body 1, the bottom of the tower body 1 is provided with a reboiler outlet 5, and a reboiler return port 6 is provided through one side of the reboiler.

[0028] A heat exchanger 7 is connected between the gas phase outlet 3 and the reflux port 4. The top of the gas phase outlet 3 is connected to the heat exchanger 7 and the heat utilization mechanism 8 through a three-phase pipe. A reboiler 9 is connected between the tower bottom outlet 5 and the tower bottom return port 6. The heat utilization mechanism 8 and the reboiler 9 are connected by a pipe.

[0029] In this embodiment, as Figure 1 and Figure 2 As shown, the interior of column 1 has several trays arranged about the central axis. Column 1 is divided into a rectification section and a stripping section about the feed inlet 2. The section above the feed inlet 2 is the rectification section, and the section below the feed inlet 2 is the stripping section. The vapor outlet 3 and reflux outlet 4 are located in the rectification section, while the reboiler outlet 5 and reboiler return outlet 6 are located in the stripping section.

[0030] In this embodiment, as Figure 1 and Figure 2 As shown, the heat exchanger 7 includes a heat exchanger shell 701, with a hot medium inlet 702 penetrating through the top of one side of the heat exchanger shell 701 and a cold medium inlet 703 penetrating through the top of the other side of the heat exchanger shell 701. A baffle is provided at the central axis of the heat exchanger shell 701. The hot medium inlet 702 is symmetrically provided with a hot medium outlet 704 about the central axis of the heat exchanger shell 701, and a cold medium outlet 705 is provided on the same side of the heat medium outlet 704 on the heat exchanger shell 701. The hot medium inlet 702, the cold medium inlet 703, the hot medium outlet 704, and the cold medium outlet 705 can be adopted as a tube sheet structure, and the hot medium outlet 704 and the return port 4 form a T-shaped pipeline.

[0031] In this embodiment, as Figure 1 and Figure 2 As shown, the heat utilization mechanism 8 includes a gas supply pipe 801, which is connected to the gas phase outlet 3 and the heat medium inlet 702 via a three-way pipe. One end of the gas supply pipe 801 is connected to a compressor 802, and the other end of the compressor 802 is connected to a gas delivery pipe 803, which is connected to the reboiler 9. The tower body 1, the gas phase outlet 3, the gas supply pipe 801, the compressor 802, the gas delivery pipe 803, and the tower bottom return port 6 constitute a loop structure.

[0032] In this embodiment, as Figure 1 and Figure 2 As shown, the reboiler 9 includes a reboiler body 901, and a liquid inlet 902 is provided on one side of the bottom of the reboiler body 901. A gas outlet 903 is provided on one side of the top of the reboiler body 901. The gas outlet 903 and the gas delivery pipe 803 are connected to the reboiler return port 6 through a three-way pipe. A product outlet 904 is provided on the bottom of the reboiler body 901 near the liquid inlet 902. The tower body 1, the reboiler outlet 5, the reboiler body 901, the gas outlet 903 and the reboiler return port 6 constitute a loop structure.

[0033] The computer software involved in the hardware carriers such as compressors in the technical solution is software technology known to those skilled in the art. It is merely applied to the aforementioned hardware carriers. In other words, the computer software portion of the technical solution is an essential technical feature for solving the aforementioned technical problem, constituting a necessary technical feature for the technical problem solved by this application, but it is not a differentiating technical feature or a point of technical improvement. The applicant has not made any technical improvements to the computer software portion involved in the aforementioned related hardware carriers, nor is it a key technical point of the invention.

[0034] Therefore, the "compressor" and other components mentioned in this application are physical functional modules that combine existing computer software programs or protocols with the hardware carrier of this application. The computer software programs involved in these physical functional modules are technologies known to those skilled in the art and are not improvements of this application. The improvement of this application should be the interaction between the various physical functional modules, that is, the improvement of the overall structure of the carbon emission reduction distillation device of this application, so as to solve the corresponding technical problems to be solved by this application.

[0035] The carbon emission reduction distillation unit operates as follows:

[0036] First, the chemical raw material to be distilled and separated is added into column 1 through raw material inlet 2. Within column 1, the multi-layered trays ensure sufficient gas-liquid contact, allowing the lighter components to pass through steam from vapor outlet 3 and the three-way pipe into heat exchanger 7 and gas supply pipe 801. The steam entering heat exchanger 7 through hot medium inlet 702 is cooled by the passage between cold medium inlet 703 and cold medium outlet 705, condensing and passing through hot medium outlet 704 to obtain the product. A portion of this product re-enters column 1 through reflux port 4 for further distillation. Under the action of compressor 802 (model: SF31-SPV700EC / AC), the lower-temperature steam at the top of the column enters the higher-temperature reboiler within column 1 through gas supply pipe 803 and reboiler return port 6. The liquid at the bottom of the reboiler enters the reboiler body 901 (model: YA) through bottom reboiler outlet 5 and the connected liquid inlet 902. Inside the reboiler (model: YA 600-100-16 / 25-2), the liquid is re-vaporized under its action and enters the tower body 1 through the gas outlet pipe 903, the three-way pipe and the tower bottom return port 6, so as to make full use of the high temperature steam, that is, to realize heat utilization and reduce carbon emissions. The heavy components in the reboiler body 901 (model: YA 600-100-16 / 25-2) are discharged through the product outlet 904.

[0037] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0038] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0039] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The above examples are only for the purpose of helping to understand the method and core ideas of this utility model. The above description is only a preferred embodiment of this utility model. It should be noted that due to the limitations of textual expression, there are objectively infinite specific structures. For those skilled in the art, several improvements, modifications, or changes can be made without departing from the principles of this utility model, and the above technical features can also be combined in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the concept and technical solution of the utility model to other occasions without modification, should all be considered within the protection scope of this utility model.

Claims

1. A carbon emission reduction distillation apparatus, comprising a column body (1), characterized in that: The tower body (1) has a raw material inlet (2) through one side of the middle section; The top of the tower body (1) is provided with a gas phase outlet (3), a reflux port (4) is provided through one side of the top of the tower body (1), a bottom outlet (5) is provided at the bottom of the tower body (1), and a bottom return port (6) is provided through one side of the bottom outlet. A heat exchanger (7) is connected between the gas phase outlet (3) and the reflux port (4). The top of the gas phase outlet (3) is connected to the heat exchanger (7) and the heat utilization mechanism (8) through a three-phase pipe. A reboiler (9) is connected between the tower bottom outlet (5) and the tower bottom return port (6). The heat utilization mechanism (8) and the reboiler (9) are connected through a pipe.

2. The carbon emission reduction distillation apparatus as described in claim 1, characterized in that: The tower body (1) has several trays arranged around the central axis inside, and the tower body (1) is divided into a rectification section and a stripping section around the raw material inlet (2). The tower body (1) above the raw material inlet (2) is the rectification section, and the tower body (1) below the raw material inlet (2) is the stripping section. The vapor outlet (3) and reflux port (4) are located in the rectification section, and the reboiler outlet (5) and reboiler return port (6) are located in the stripping section.

3. The carbon emission reduction distillation apparatus as described in claim 1, characterized in that: The heat exchanger (7) includes a heat exchanger shell (701), and a hot medium inlet (702) is provided through the top of one side of the heat exchanger shell (701), and a cold medium inlet (703) is provided through the top of the other side of the heat exchanger shell (701). A partition is provided at the central axis of the heat exchanger shell (701). The hot medium inlet (702) is symmetrically provided with a hot medium outlet (704) about the central axis of the heat exchanger shell (701), and a cold medium outlet (705) is provided on the same side of the heat medium outlet (704) of the heat exchanger shell (701). The hot medium inlet (702), cold medium inlet (703), hot medium outlet (704) and cold medium outlet (705) can be a tube sheet structure as a whole, and the hot medium outlet (704) and the return port (4) form a T-shaped pipeline.

4. The carbon emission reduction distillation apparatus as described in claim 1, characterized in that: The heat utilization mechanism (8) includes a gas supply pipe (801), and the gas supply pipe (801) is connected to the gas phase outlet (3) and the heat medium inlet (702) through a three-way pipe. One end of the gas supply pipe (801) is connected to a compressor (802), and the other end of the compressor (802) is connected to a gas delivery pipe (803), and the gas delivery pipe (803) is connected to a reboiler (9). The tower body (1), the gas phase outlet (3), the gas supply pipe (801), the compressor (802), the gas delivery pipe (803), and the tower bottom return port (6) constitute a loop structure.

5. The carbon emission reduction distillation apparatus as described in claim 1, characterized in that: The reboiler (9) includes a reboiler body (901), and a liquid inlet (902) is provided on one side of the bottom of the reboiler body (901). A gas outlet pipe (903) is provided on one side of the top of the reboiler body (901), and the gas outlet pipe (903) and the gas delivery pipe (803) are connected to the return port (6) of the tower bottom through a three-way pipe.

6. The carbon emission reduction distillation apparatus as described in claim 5, characterized in that: The bottom of the reboiler body (901) is provided with a product outlet (904) near the liquid inlet (902). The tower body (1), the tower bottom outlet (5), the reboiler body (901), the gas outlet pipe (903), and the tower bottom return port (6) constitute a loop structure.

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