Multi-component material rectification separation system

Abstract

The utility model relates to a multi-component material rectification separation system which comprises a separation device and a rectification tower, and the separation device is provided with a raw material feed port, a light phase discharge port and a heavy phase discharge port; the rectifying tower is provided with a side line extraction port, the heavy phase discharge port of the separating device is connected with the feed port of the rectifying tower, and the tower top of the rectifying tower flows back to the feed section of the separating device. Light components are extracted from a light-phase discharge port of the separation device, and a mixed material b (a small amount of unseparated light components, middle components and heavy components) is extracted from a heavy-phase discharge port and fed into a rectifying tower; middle components are extracted from a side line extraction opening of the rectifying tower, heavy components are extracted from a tower kettle of the rectifying tower, a mixed material c (light components and a small amount of middle components) is extracted from the tower top of the rectifying tower, and the mixed material c flows back to the feeding section of the separating device. The system is suitable for mixed materials in which light components can be easily decomposed from intermediate components, the purity of the intermediate components can be prevented from being influenced by decomposition products of the intermediate components, and the whole system is more balanced and stable.

Description

Technical Field

[0001] The utility model belongs to the technical field of material distillation and separation, and in particular relates to a multi-component material distillation and separation system. Background Art

[0002] The distillation separation of multi-component mixed materials (including light components, intermediate components, and heavy components) is a common chemical separation process. For the separation of products with easy decomposition characteristics, such as ester products, which are easy to decompose into light components, when using conventional distillation towers for separation, the products continue to decompose during the separation process, and only a mixture of products and light components can be obtained at the top of the tower, and the purity of the products cannot be guaranteed. Therefore, how to avoid product decomposition and obtain high-purity products is one of the difficulties faced by the separation of this type of mixed material system.

[0003] The separation of multi-component mixed materials generally adopts a two-tower forward separation process, which requires two distillation towers (a first distillation tower and a second distillation tower). The light component is distilled from the top of the first distillation tower, and the intermediate component and the heavy component flow from the bottom of the first distillation tower into the second distillation tower, where the intermediate component and the heavy component are separated. However, this solution cannot solve the problem of product decomposition. Chinese Patent Publication No. CN117753034A provides a distillation tower with a partition inner wall for the continuous distillation process of dimethylbenzyl butyrate, but in the actual production process, the control of the dividing wall tower is difficult, and the equipment structure is complex and the manufacturing cost is high. Utility Model Content

[0004] The utility model makes improvements on the problems existing in the above-mentioned prior art, that is, the technical problem to be solved by the utility model is to provide a multi-component material distillation separation system.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a multi-component material distillation separation system, comprising a separation device and a distillation tower arranged in sequence along the material flow order, the separation device is provided with a raw material feed port, a light phase discharge port and a heavy phase discharge port; the distillation tower is provided with a side line production port, the heavy phase discharge port of the separation device is connected to the feed port of the distillation tower, and the top of the distillation tower is refluxed to the feed section of the separation device.

[0006] Furthermore, the feed section of the separation device is provided with a raw material tank for placing raw materials, and a feed pump is provided between the raw material tank and the raw material feed port of the separation device; the top of the distillation tower is refluxed to the raw material tank.

[0007] Furthermore, the light phase discharge port of the separation device is connected to the first storage tank through the first condenser, and the first storage tank stores the light phase material condensed by the first condenser.

[0008] Furthermore, the top of the distillation tower is connected to the second storage tank through a second condenser, and the condensate discharge port of the second storage tank is connected to the raw material tank through a reflux pump, so that the condensate flows back to the raw material tank for further treatment.

[0009] Furthermore, the separation device is a distillation device or a rectification device.

[0010] Furthermore, the operating temperature range of the distillation tower is 70-130 o C, pressure is -0.098MPa.

[0011] Furthermore, the side line outlet is arranged at the upper part of the distillation tower.

[0012] Compared with the prior art, the utility model has the following effects: the utility model is suitable for mixed materials in which the intermediate component is easy to decompose into a light component, and can avoid the purity of the intermediate component being affected by its decomposition product. The system as a whole is more balanced, stable and practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the principle of an embodiment of the utility model;

[0014] Figure 2 It is a schematic diagram of the structure of an embodiment of the utility model.

[0015] In the figure:

[0016] 1-distillation tower; 2-separation device; 3-raw material tank; 4-feed pump; 5-first condenser; 6-first storage tank; 7-second condenser; 8-second storage tank; 9-reflux pump; 10-raw material feed port; 11-light phase discharge port; 12-heavy phase discharge port; 13-side line extraction port; A-light component. DETAILED DESCRIPTION

[0017] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0018] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0019] like Figure 1As shown, the utility model is a multi-component material distillation separation system, the separated material is a three-component (light component, intermediate component, heavy component) mixture material a, wherein the intermediate component is the target product. It comprises a separation device 2 and a distillation tower 1 which are sequentially arranged along the material flow sequence, the separation device 2 is provided with a raw material feed port 10, a light phase discharge port 11 and a heavy phase discharge port 12, the raw material feed port is for facilitating the input of raw materials into the separation device, the light phase discharge port is for facilitating the output of light component materials, and the heavy phase discharge port is for facilitating the output of heavy component materials; the distillation tower 1 is provided with a side line extraction port 13, the heavy phase discharge port 12 of the separation device 2 is connected to the feed port of the distillation tower 1, and the top of the distillation tower 1 is refluxed to the feed section of the separation device 2. The system is applied to the distillation separation process of a multi-component mixed material including a light component, an intermediate component and a heavy component. When the system is working, the multi-component mixed material enters the separation device, the light component is extracted from the light phase outlet of the separation device, and the mixed material b (a small amount of unseparated light component, intermediate component and heavy component) is extracted through the heavy phase outlet and sent to the distillation tower; the intermediate component B is extracted from the side line outlet of the distillation tower, the heavy component is extracted from the bottom of the distillation tower, and the mixed material c (light component and a small amount of intermediate component) is extracted from the top of the distillation tower, and the mixed material c is refluxed to the feed section of the separation device.

[0020] In this embodiment, Figure 2 As shown, the feed section of the separation device 2 is provided with a raw material tank 3 for placing raw materials (i.e., mixed material a), and a feed pump 4 is provided between the raw material tank 3 and the raw material feed port of the separation device 2, and the feed pump is used to transport the material in the raw material tank to the separation device; the top of the distillation tower 1 refluxes to the raw material tank 3.

[0021] In this embodiment, Figure 2 As shown, the light phase discharge port of the separation device 2 is connected to the first storage tank 6 through the first condenser 5 , and the first storage tank 6 stores the light phase material condensed by the first condenser 5 .

[0022] In this embodiment, Figure 2 As shown, the top of the distillation tower 1 is connected to the second storage tank 8 through the second condenser 7, and the second storage tank stores the material condensed by the second condenser. The condensate outlet of the second storage tank 8 is connected to the raw material tank 3 through the reflux pump 9, so that the condensate flows back to the raw material tank 3 for further treatment. Specifically, the mixed material c extracted from the top of the distillation tower 1 is refluxed and mixed with the mixed material a to form a mixed material d, and the mixed material d is sent to the separation device 2 for separation.

[0023] In this embodiment, the separation device 2 is an existing distillation device or rectification device. After the system is stable, the boiling point difference between the light component and the heavy component in the mixed material d is large, so the separation capacity requirement of the separation device 2 is not high, and there are many types of optional separation devices.

[0024] In this embodiment, the temperature, pressure and other conditions of the distillation tower 1 are calculated according to the actual material conditions and are set so that the mixed components (mixed material c) of the light components that have not been de-lightened and part of the intermediate components are produced from the top of the tower, the intermediate components are mainly produced from the side line, and the residual intermediate components, heavy components and other impurities are mainly produced from the bottom of the tower. For example, the operating temperature range of the distillation tower is 70-130°C and the pressure is -0.098Mpa.

[0025] In this embodiment, the side line outlet 13 is arranged at the upper part of the distillation tower 1. Further, according to the actual material composition, the side line outlet can also be arranged at the lower part of the distillation tower. There is at least one side line outlet, and the specific number can be set according to needs.

[0026] Working principle: The material separated by this system is a three-component (light component, intermediate component, heavy component) mixture a, in which the intermediate component is the target product. When working, the mixture a first passes through the separation device 2. The conditions of the separation device 2 are set to separate part of the light component, and the remaining intermediate component, heavy component and the light component that has not been de-lightened (mixed material b) are sent to the distillation tower 1. The temperature, pressure and other conditions of the distillation tower 1 are calculated according to the actual situation of the material, and are set to make the mixed component (mixed material c) of the light component that has not been de-lightened and part of the intermediate component be produced from the top of the tower, the intermediate component is mainly produced from the side line, and the residual intermediate component, heavy component and other impurities are mainly produced from the bottom of the tower; the mixed material c produced from the top of the distillation tower 1 is refluxed and mixed with the mixed material a to form a mixed material d, and the mixed material d is sent to the separation device 2 for separation.

[0027] In the embodiment, the separation device 2 is a scraped film evaporator, and the system is applied to the separation process of a mixture a of ethanol (light component), diethyl sulfate (intermediate component) and water (heavy component). The main target product is diethyl sulfate (intermediate component): in the actual separation process, diethyl sulfate is easily decomposed when heated, and the main decomposition products include ethanol, etc.; the raw material composition is: 97% diethyl sulfate, 0.5% water, 0.5% ethanol content, 1.75% ether content, and 0.25% impurity content; during operation: the raw material (mixed material a) is continuously transported to the scraped film evaporator by the feed pump 4 for evaporation and light removal, the vapor phase light component is extracted from the upper part of the scraped film evaporator, and most of the ethanol is separated. The light component is condensed by the first condenser 5 and temporarily stored in the first storage tank 6; the liquid phase separated by the scraped film evaporator enters the distillation tower 1 for distillation, and the working temperature range of the distillation tower 1 is 70-130 oC, the pressure is -0.098MPa. In the distillation tower, the materials taken out from the top of the tower are mainly ethanol and part of the product diethyl sulfate. After condensation treatment in the second condenser 7, the condensate contains diethyl sulfate and is returned to the raw material tank 3 for further treatment to further separate the light components that have not been completely removed; the uncondensed gas is dissolved in water after entering the water jet vacuum pump and discharged as wastewater or used in other sections. The side line of the distillation tower partially produces high-purity diethyl sulfate, and the rest flows back into the distillation tower. The bottom of the tower produces the bottom liquid, which is mainly composed of diethyl sulfate, ethanol and water. After sampling, testing and analysis, the purity of diethyl sulfate in the side line product is above 99.95%, the moisture content is less than 300ppm, and the acidity is ≤0.02%.

[0028] The advantages of the utility model are as follows: a mixed component of light components and intermediate components is extracted from the top of the distillation tower, the requirements for tower top separation are reduced, the separation fineness is higher, and a high-purity product can be extracted from the tower side line; the system is particularly suitable for mixed materials in which intermediate components are easily decomposed into light components, and the purity of the intermediate components of the product can be prevented from being affected by their decomposition products; and the temperature of the top of the distillation tower is relatively high during operation, and the system as a whole is more balanced and stable; the system is based on a simple equipment design separation process and has strong practicality.

[0029] If the present invention discloses or involves components or structures that are fixedly connected to each other, then, unless otherwise stated, the fixed connection can be understood as: a detachable fixed connection (for example, connection using bolts or screws), and can also be understood as: a non-detachable fixed connection (for example, riveting, welding). Of course, the mutual fixed connection can also be replaced by an integrated structure (for example, manufactured by one-piece molding using a casting process) (except where it is obviously impossible to use an one-piece molding process).

[0030] In addition, unless otherwise stated, the terms used to indicate positional relationships or shapes in any of the technical solutions disclosed in the above utility model include states or shapes that are approximate, similar or close thereto.

[0031] Any component provided by the utility model can be assembled from multiple separate components, or can be a separate component manufactured by an integrated molding process.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the utility model can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the utility model, which should be included in the scope of the technical solution for protection of the utility model.

Claims

1. A multi-component material distillation separation system, characterized in that: It comprises a separation device and a distillation tower which are sequentially arranged along the material flow sequence, wherein the separation device is provided with a raw material feed port, a light phase discharge port and a heavy phase discharge port; the distillation tower is provided with a side line production port, the heavy phase discharge port of the separation device is connected with the feed port of the distillation tower, and the top of the distillation tower is refluxed to the feed section of the separation device.

2. The multi-component material distillation separation system according to claim 1, characterized in that: The feed section of the separation device is provided with a raw material tank for placing raw materials, and a feed pump is provided between the raw material tank and the raw material feed port of the separation device; the top of the distillation tower refluxes to the raw material tank.

3. The multi-component material distillation separation system according to claim 2, characterized in that: The light phase discharge port of the separation device is connected to the first storage tank through the first condenser, and the first storage tank stores the light phase material condensed by the first condenser.

4. The multi-component material distillation separation system according to claim 2, characterized in that: The top of the distillation tower is connected to the second storage tank through a second condenser, and the condensate discharge port of the second storage tank is connected to the raw material tank through a reflux pump, so that the condensate flows back to the raw material tank for further treatment.

5. The multi-component material distillation separation system according to claim 1, 2 or 3, characterized in that: The separation device is a distillation device or a rectification device.

6. The multi-component material distillation separation system according to claim 1, characterized in that: The operating temperature range of the distillation tower is 70-130 o C, pressure is -0.098MPa.

7. The multi-component material distillation separation system according to claim 1, characterized in that: The side line outlet is arranged at the upper part of the distillation tower.

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