dividing wall column

Abstract

The application discloses a dividing wall column, which comprises a pre-separation section, an intermediate extraction section, a dividing wall, a guide plate, a common rectification section and a common stripping section. The pre-separation section is arranged at the left side of the middle part of the dividing wall column; the intermediate extraction section is arranged at the right side of the middle part of the dividing wall column; the dividing wall is arranged between the pre-separation section and the intermediate extraction section; the tower plates on both sides of the dividing wall are arranged in a staggered mode; the guide plate is arranged on the tower plates of the pre-separation section and the intermediate extraction section; the common rectification section is arranged at the top of the pre-separation section and the intermediate extraction section; and the common stripping section is arranged at the bottom of the pre-separation section and the intermediate extraction section. The dividing wall column can effectively reduce the heat transfer amount in the rectification process.

Description

Technical Field

[0001] This application belongs to the field of partition tower technology, and particularly relates to a partition tower. Background Technology

[0002] Divided-wall columns are crucial separation equipment in distillation processes, offering significant advantages in improving thermal efficiency, reducing energy consumption, lowering equipment investment, and minimizing floor space. However, in actual distillation processes, heat transfer between the media on either side of the partition wall can negatively impact distillation performance, potentially causing deviations from design parameters and disrupting the column's stable operation. Therefore, a partitioned-wall column design that effectively reduces heat transfer during distillation is needed. Summary of the Invention

[0003] The purpose of this application is to provide a partitioned column to solve the technical problem existing in the prior art: how to effectively reduce the heat transfer in the distillation process.

[0004] To solve the above-mentioned technical problems, this application adopts the following technical solution:

[0005] This application provides a partitioned column, characterized by comprising: a pre-separation section disposed on the left side of the middle portion of the partitioned column, used to separate a three-component substance into two two-component substances; an intermediate collection section disposed on the right side of the middle portion of the partitioned column, used to collect a single-component substance; a partition wall disposed between the pre-separation section and the intermediate collection section, wherein the plates on both sides of the partition wall are arranged in a staggered manner to reduce the heat transfer between the pre-separation section and the intermediate collection section; guide plates disposed on the plates of the pre-separation section and the intermediate collection section, used to reduce the heat transfer of the partitioned column; a common rectification section disposed at the top of the pre-separation section and the intermediate collection section, used to separate the two-component substance into a single-component substance; and a common stripping section disposed at the bottom of the pre-separation section and the intermediate collection section, used to separate the two-component substance into a single-component substance.

[0006] In some embodiments, the pre-separation section includes an upper pre-separation section and a lower pre-separation section. The upper pre-separation section is provided with a non-overflow tray and / or a single-overflow tray and / or a double-overflow tray and / or a quadruple-overflow tray. The lower pre-separation section is provided with a non-overflow tray and / or a single-overflow tray and / or a double-overflow tray and / or a quadruple-overflow tray. The upper pre-separation section is located at the top of the lower pre-separation section. The trays are used to transfer components in the gaseous phase and the liquid phase to achieve the separation of different components.

[0007] In some embodiments, the intermediate extraction section is provided with a non-overflow tray and / or a single overflow tray and / or a double overflow tray and / or a quad overflow tray, the trays being used to transfer components in the gaseous and liquid phases to achieve separation of different components.

[0008] In some embodiments, the common rectification section is provided with a non-overflow tray and / or a single overflow tray and / or a double overflow tray and / or a quad overflow tray, the trays being used to transfer components in the gas phase and liquid phase to achieve separation of different components.

[0009] In some embodiments, the common stripping section is provided with a non-overflow tray and / or a single-overflow tray and / or a double-overflow tray and / or a quadruple-overflow tray, the trays being used to transfer components in the gas phase and liquid phase to achieve separation of different components.

[0010] In some embodiments, the partition tower further includes a bubbling promoter and / or an auxiliary weir, which are disposed on the tower plate to reduce the height of the liquid layer on the tower plate, thereby reducing the heat transfer of the partition tower.

[0011] In some embodiments, the common distillation section further includes an oil collection tank disposed at the bottom of the common distillation section for collecting liquid phase substances flowing out of the common distillation section, so that the collected liquid phase substances are distributed proportionally to the pre-separation section and the intermediate extraction section.

[0012] In some embodiments, the partition tower further includes a plurality of operating ports for installing devices inside the partition tower.

[0013] In some embodiments, the partition wall column further includes a feed inlet and a discharge outlet. The feed inlet is located outside the pre-separation section and is used to input three-component substances into the partition wall column. The discharge outlet is located outside the common rectification section, the intermediate collection section, and the common stripping section and is used to output single-component substances.

[0014] In some embodiments, the partition column further includes a bottom baffle plate disposed at the bottom of the common stripping section to maintain a constant liquid level on the right side of the bottom baffle plate.

[0015] As can be seen from the above technical solution, this application has at least the following advantages and positive effects:

[0016] The partition tower in this application has a pre-separation section on the left side of the middle of the partition tower, an intermediate extraction section on the right side of the middle of the partition tower, and a partition wall between the pre-separation section and the intermediate extraction section. The tower plates on both sides of the partition wall are arranged in a staggered manner to reduce the heat transfer between the pre-separation section and the intermediate extraction section.

[0017] In addition, a common rectification section is set at the top of the pre-separation section and the intermediate collection section, and a stripping section is set at the bottom of the pre-separation section and the intermediate collection section. Furthermore, trays are provided in the upper pre-separation section, the lower pre-separation section, the intermediate collection section, the common rectification section, and the common stripping section. The tray structure can be a non-overflow tray and / or a single-overflow tray and / or a double-overflow tray and / or a quadruple-overflow tray. Guide plates are also provided on the trays in the pre-separation section and the intermediate collection section. These guide plates effectively reduce the flow velocity of the liquid phase in the adjacent column, thereby reducing the heat transfer within the adjacent column.

[0018] By determining the structure of the trays in the diverter column, arranging the trays in the pre-separation section and intermediate collection section in a staggered manner, and installing guide plates on the trays in the pre-separation section and intermediate collection section, the heat transfer of the diverter column during the distillation process can be reduced while completing the separation of the three components. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of the partition tower according to an embodiment;

[0021] Figure 2 This is a schematic diagram of the common rectification section according to an embodiment;

[0022] Figure 3 This is a schematic diagram of the pre-separation section according to an embodiment;

[0023] Figure 4 This is a schematic diagram of the intermediate extraction section according to an embodiment;

[0024] Figure 5 This is a schematic diagram of the common stripping section according to an embodiment.

[0025] The annotations in the attached figures are explained as follows:

[0026] Detailed Implementation

[0027] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0028] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0029] The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first," "second," or "third" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "multiple" means two or more.

[0030] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "connection," "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0031] Reference Figure 1 As shown, this application provides a partitioned column 100, which is mainly used to separate three components, i.e., to perform distillation on the three components. Simultaneously, it can effectively reduce the heat transfer during the distillation process of the partitioned column 100.

[0032] Specifically, the partition tower 100 includes a pre-separation section 120, located on the left side of the middle section of the partition tower 100, used to separate the three-component substance into two two-component substances; an intermediate extraction section 130, located on the right side of the middle section of the partition tower 100, used to collect the single-component substance; a partition wall 108, located between the pre-separation section 120 and the intermediate extraction section 130, with the trays on both sides of the partition wall 108 arranged in a staggered manner to reduce the heat transfer between the pre-separation section 120 and the intermediate extraction section 130; and guide plates (not included in the design). Figure 1 As shown in the diagram, guide plates are installed on the trays of the pre-separation section 120 and the intermediate collection section 130 to reduce the heat transfer of the adjacent column 100; a common rectification section 110 is installed at the top of the pre-separation section 120 and the intermediate collection section 130 to separate the binary component into a single component; and a common stripping section 140 is installed at the bottom of the pre-separation section 120 and the intermediate collection section 130 to separate the binary component into a single component.

[0033] In this embodiment, the partition column 100 can effectively separate three components by utilizing the different boiling points of the injected substances, thereby obtaining single-component substances with high purity. First, by injecting the three components into the pre-separation section 120 of the partition column 100, the three components can be separated into two binary components. For example, if the three components are composed of ABC, due to the different boiling points of the components, after processing in the pre-separation section 120, the three components can be separated into AB and BC, or AC and BC. Taking the binary components AB and BC as an example, where A has the lowest boiling point and C has the highest boiling point. After obtaining the binary components AB and BC, AB rises from the top tray of the pre-separation section 120 into the common rectification section 110, at which point AB is a gaseous substance (i.e., a gaseous state). BC flows from the bottom tray of the pre-separation section 120 into the common stripping section 140, at which point BC is a liquid substance (i.e., a liquid state).

[0034] In the common rectification section 110, substances AB are separated into single-component substances A and B by the trays and downcomers. Since the boiling point of A is lower than that of B, A can be a gaseous substance, and B can be a liquid substance. Therefore, a high-purity A substance can be obtained at the top of the common rectification section 110. It should be noted that because the boiling points of the binary substance AB and the single-component substance B are similar, the liquid phase at the bottom of the common rectification section 110 includes both substances AB and B. To obtain a high-purity B substance, the material at the bottom of the common rectification section 110 can be collected and redistributed in a certain proportion to the pre-separation section 120 and the intermediate collection section 130 for multiple separations, thereby obtaining a high-purity B substance.

[0035] In the common stripping section 140, substances BC are separated into single-component substances B and C by the trays and downcomers. Since the boiling point of B is lower than that of C, B can be a gaseous substance, while C can be a liquid substance. Therefore, high-purity C can be obtained at the bottom of the common stripping section 140. It should be noted that because the boiling points of the binary substance BC and the single-component substance B are similar, the gaseous substance at the top of the common stripping section 140 includes both substances BC and B. To obtain high-purity B, the substance at the top of the common stripping section 140 can be collected and redistributed in a certain proportion to the pre-separation section 120 and the intermediate collection section 130 for multiple separations to obtain high-purity B.

[0036] In the intermediate extraction section 130, after multiple separations in the common rectification section 110 and the common stripping section 140, a single component substance B with high purity can be obtained.

[0037] By combining the above process steps, the partition column 100 can separate the three components into three single-component substances with relatively high purity. Simultaneously, throughout the distillation process of the partition column 100, a partition wall 108 is provided. The partition wall 108 is located between the pre-separation section 120 and the intermediate collection section 130. The trays on both sides of the partition wall 108 are arranged in a staggered manner to reduce the heat transfer between the pre-separation section 120 and the intermediate collection section 130. It should be noted that the staggered arrangement separates the gaseous and liquid phases in the pre-separation section 120 and the intermediate collection section 130 on both sides of the partition wall 108, thereby effectively reducing the heat transfer during the distillation process of the partition column 100. Furthermore, guide plates are provided on the trays in the pre-separation section 120 and the intermediate collection section 130. The guide plate effectively reduces the pushing effect of gaseous substances on the liquid substances between the guide plate and the partition wall 108, thereby reducing the flow velocity of the liquid substances between the guide plate and the partition wall 108, and further reducing the heat transfer coefficient of the liquid substances in the partition wall 108, thus achieving the purpose of reducing the heat transfer between the substances on both sides of the partition wall 108. The guide plate can also be installed on the trays in the pre-separation section 120 and the intermediate extraction section 130 to reduce the heat transfer between the substances on both sides of the partition wall 108.

[0038] Meanwhile, due to the flow of liquid substances between the guide plate and the partition wall 108, no dead zone will be formed in this area. Therefore, the partition wall column 100 with staggered tray arrangement of this application can effectively reduce the heat transfer during the distillation process of the partition wall column 100.

[0039] It should be noted that the type and number of trays in the partition tower 108 in this application can be different types and numbers of trays according to different actual needs. Among them, the types of trays may include floating valve trays, fixed valve trays, sieve trays, bubble cap trays, inclined spray trays, vertical mass transfer trays, overflow weir-less trays, and other types of trays.

[0040] In some embodiments, the pre-separation section 120 includes an upper pre-separation section and a lower pre-separation section, the upper pre-separation section being provided with an overflow-free tray ( Figure 1 (not shown in the image) and / or single overflow tray 104 and / or double overflow tray 106 and / or quad overflow tray ( Figure 1 (Not shown in the image), the lower pre-separation section is equipped with an overflow-free tray ( Figure 1 (not shown in the image) and / or single overflow tray 104 and / or double overflow tray 106 and / or quad overflow tray ( Figure 1 (Not shown in the image), the upper pre-separation section is located at the top of the lower pre-separation section, and the tray is used to transfer components in the gas phase and liquid phase to achieve the separation of different components.

[0041] In this example, when three components are injected into the pre-separation section, the gaseous components with lower boiling points rise through the upper pre-separation section to the common rectification section 110 in the adjacent column 100. Simultaneously, when the material is refluxed in the common rectification section 110, it is reseparated through the upper pre-separation section.

[0042] Additionally, when the three components are injected into the pre-separation section 120, the liquid phase with the higher boiling point among the three components flows through the lower pre-separation section to the common stripping section 140 in the adjacent column 100. Simultaneously, when the material is refluxed in the common stripping section 140, it is re-separated through the lower pre-separation section.

[0043] In some embodiments, the intermediate extraction section 130 is provided with an overflow-free tray ( Figure 1 (not shown in the image) and / or single overflow tray 104 and / or double overflow tray 106 and / or quad overflow tray ( Figure 1 (Not shown in the image), the tray is used to transfer components in gaseous and liquid phases to achieve separation of different components.

[0044] In some embodiments, the common rectification section 110 is provided with an overflow-free tray ( Figure 1 (not shown in the image) and / or single overflow tray 104 and / or double overflow tray 106 and / or quad overflow tray ( Figure 1 (Not shown in the image), the tray is used to transfer components in gaseous and liquid phases to achieve separation of different components.

[0045] In some embodiments, the common stripping section 140 is provided with a non-overflow tray ( Figure 1 (not shown in the image) and / or single overflow tray 104 and / or double overflow tray 106 and / or quad overflow tray ( Figure 1 (Not shown in the image), the tray is used to transfer components in gaseous and liquid phases to achieve separation of different components.

[0046] In some embodiments, the partition tower 100 further includes a bubbling promoter ( Figure 1 (not shown in the image) and / or auxiliary weirs ( Figure 1 (Not shown in the image), the promoter and / or auxiliary weir are arranged on the tray to reduce the height of the liquid layer on the tray, thereby reducing the heat transfer of the partition tower 100.

[0047] In this example, by setting a promoter and / or an auxiliary weir on the tray, the liquid layer height of the liquid phase on the tray can be effectively reduced, thereby reducing the contact area between the liquid phase and the partition wall 108, and thus reducing the heat transfer between the substances on both sides of the partition wall 108.

[0048] In some embodiments, the common distillation section 110 further includes an oil collection tank 105, which is disposed at the bottom of the common distillation section 110 for collecting liquid phase substances flowing out of the common distillation section 110, so that the collected liquid phase substances are distributed proportionally to the pre-separation section 120 and the intermediate extraction section 130.

[0049] In some embodiments, the partition tower 100 further includes a plurality of operating ports 101 for installing devices inside the partition tower 100.

[0050] In some embodiments, the partition column 100 further includes a feed inlet 103 and a discharge outlet 102. The feed inlet 103 is located outside the pre-separation section 120 and is used to input three-component substances into the partition column 100. The discharge outlet 102 is located outside the common rectification section 110, the intermediate collection section 130, and the common stripping section 140 and is used to output single-component substances.

[0051] In some embodiments, the partition column 100 further includes a bottom partition 109, which is disposed at the bottom of the common stripping section 140 to maintain a constant liquid level on the right side of the bottom partition 109.

[0052] In this example, the partition column 100 also includes a bottom baffle 109, which is located at the bottom of the common stripping section 140. The bottom baffle 109 maintains a constant liquid level on its right side. Simultaneously, liquid substances overflowing from the bottom baffle 109 flow from the top to the left side. The liquid substances on the right side of the bottom baffle 109 enter a thermosiphon reboiler outside the partition column 100 through a pipe at the bottom of the partition column 100, while the liquid substances on the left side of the bottom baffle 109 enter a pump outside the partition column 100 through a pipe at the bottom of the partition column 100, thus entering downstream equipment. The thermosiphon reboiler converts a portion of the liquid substances into gaseous substances and transports both the gaseous and liquid substances into the partition column to provide heat and separate the components for the distillation process.

[0053] As can be seen from the above technical solution, this application has at least the following advantages and positive effects:

[0054] The partition tower in this application has a pre-separation section on the left side of the middle of the partition tower, an intermediate extraction section on the right side of the middle of the partition tower, and a partition wall between the pre-separation section and the intermediate extraction section. The tower plates on both sides of the partition wall are arranged in a staggered manner to reduce the heat transfer between the pre-separation section and the intermediate extraction section.

[0055] In addition, a common rectification section is set at the top of the pre-separation section and the intermediate collection section, and a stripping section is set at the bottom of the pre-separation section and the intermediate collection section. Furthermore, trays are provided in the upper pre-separation section, the lower pre-separation section, the intermediate collection section, the common rectification section, and the common stripping section. The tray structure can be a non-overflow tray and / or a single-overflow tray and / or a double-overflow tray and / or a quadruple-overflow tray. Guide plates are also provided on the trays in the pre-separation section and the intermediate collection section. These guide plates effectively reduce the flow velocity of the liquid phase in the adjacent column, thereby reducing the heat transfer within the adjacent column.

[0056] By determining the structure of the trays in the diverter column, arranging the trays in the pre-separation section and intermediate collection section in a staggered manner, and installing guide plates on the trays in the pre-separation section and intermediate collection section, the heat transfer of the diverter column during the distillation process can be reduced while completing the separation of the three components.

[0057] Although this application has been described with reference to several typical embodiments, it should be understood that the terminology used is descriptive and exemplary, and not restrictive. Since this application can be embodied in many forms without departing from the spirit or substance of the application, it should be understood that the above embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope defined by the appended claims. Therefore, all variations and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. A partition tower, characterized in that, include: A pre-separation section is located on the left side of the middle part of the partition tower, and is used to separate the three-component substance into two two-component substances. An intermediate extraction section is located on the right side of the middle part of the adjacent tower and is used to collect single-component substances; A partition wall is provided between the pre-separation section and the intermediate extraction section. The trays on both sides of the partition wall are arranged in a staggered manner to reduce the heat transfer between the pre-separation section and the intermediate extraction section. The guide plate is disposed on the tower plate of the pre-separation section and the intermediate extraction section. The guide plate reduces the flow rate of the liquid phase material between the partition walls, thereby reducing the heat transfer coefficient of the liquid phase material between the partition walls, and thus reducing the heat transfer of the partition tower. A common distillation section is located at the top of the pre-separation section and the intermediate collection section, and is used to separate the two-component substance into a single-component substance; A common stripping section is located at the bottom of the pre-separation section and the intermediate extraction section, and is used to separate the two-component substance into a single-component substance.

2. The partition tower according to claim 1, characterized in that, The pre-separation section includes an upper pre-separation section and a lower pre-separation section. The upper pre-separation section is equipped with a non-overflow tray and / or a single-overflow tray and / or a double-overflow tray and / or a quadruple-overflow tray. The lower pre-separation section is equipped with a non-overflow tray and / or a single-overflow tray and / or a double-overflow tray and / or a quadruple-overflow tray. The upper pre-separation section is located at the top of the lower pre-separation section. The trays are used to transfer components in the gaseous and liquid phases to achieve the separation of different components.

3. The partition tower according to claim 1, characterized in that, The intermediate extraction section is equipped with a non-overflow type tray and / or a single overflow type tray and / or a double overflow type tray and / or a quad overflow type tray. The trays are used to transfer components in the gas phase and liquid phase to achieve the separation of different components.

4. The partition tower according to claim 1, characterized in that, The common rectification section is equipped with non-overflow trays and / or single-overflow trays and / or double-overflow trays and / or quad-overflow trays. The trays are used to transfer components in the gas phase and liquid phase to achieve the separation of different components.

5. The partition tower according to claim 1, characterized in that, The common stripping section is equipped with non-overflow trays and / or single-overflow trays and / or double-overflow trays and / or quad-overflow trays. The trays are used to transfer components in the gas phase and liquid phase to achieve the separation of different components.

6. The partition tower according to claim 1, characterized in that, The partition tower also includes a bubbling promoter and / or an auxiliary weir, which are disposed on the tower plate to reduce the height of the liquid layer on the tower plate, thereby reducing the heat transfer of the partition tower.

7. The partition tower according to claim 1, characterized in that, The common distillation section also includes an oil collection tank, which is located at the bottom of the common distillation section and is used to collect the liquid phase material flowing out of the common distillation section so that the collected liquid phase material is distributed proportionally to the pre-separation section and the intermediate extraction section.

8. The partition tower according to claim 1, characterized in that, The partition tower also includes multiple operating ports for installing components inside the partition tower.

9. The partition tower according to claim 1, characterized in that, The partition wall column also includes a feed inlet and a discharge outlet. The feed inlet is located outside the pre-separation section and is used to input three-component substances into the partition wall column. The discharge outlet is located outside the common rectification section, the intermediate collection section, and the common stripping section and is used to output single-component substances.

10. The partition tower according to claim 1, characterized in that, The partition column also includes a bottom baffle plate, which is located at the bottom of the common stripping section to maintain a constant liquid level on the right side of the bottom baffle plate.

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