Rectification device in isobutanol production process

Abstract

The utility model discloses a rectification device in an isobutanol production process, which comprises a rectification tank, a condenser and a reboiler, the condenser is arranged at the top of the rectification tank and is used for circularly condensing gaseous materials, the reboiler is arranged at the bottom of the rectification tank and is used for circularly gasifying liquid materials, a feeding pipe is arranged on the outer side of the rectification tank, and the feeding pipe is communicated with the reboiler. Flow guide partition plates which are vertically arranged are fixedly mounted in the rectification tank. Recondensed liquid gathers on the flow guide partition plate, the liquid level exceeds the overflow plate and flows downwards, steam at the bottom flows upwards along the air holes in the flow guide partition plate under the action of pressure, gas-liquid two-phase contact is achieved, and meanwhile due to the fact that the flow equalizing cover on the flow guide partition plate is completely immersed by stock solution, the flow equalizing cover is completely immersed by the stock solution. The stock solution at the bottom is heated by the reboiler to form steam, and the steam rises and is dispersed by the flow equalizing cover, so that more efficient contact efficiency with the stock solution is realized, and the device has the advantages of high gas-liquid double-phase contact efficiency, improvement of rectification efficiency and reduction of equipment energy consumption.

Description

Technical Field

[0001] This utility model relates to the field of isobutanol production, and more specifically, to a distillation apparatus in the isobutanol production process. Background Technology

[0002] The distillation process for isobutanol production involves preheating the feed liquid to a set temperature before it enters a distillation column from the middle. Inside the column, the feed liquid undergoes countercurrent contact with rising vapor. Lighter components accumulate upwards through trays or packing, and after complete liquefaction in the top condenser, a portion is collected as the top product, while the remainder is returned to the top as reflux. Heavier components flow downwards with the liquid phase to the bottom of the column, where they are partially vaporized by heating in a reboiler. The vapor then rises and participates in mass transfer, while the remaining liquid at the bottom is discharged as the bottom product. During this process, the reboiler continuously provides the heat source for vaporization, while the condenser removes heat through a cooling medium. The system optimizes separation efficiency by adjusting the reflux ratio. Some units also recover waste heat from the condenser for feed preheating, achieving cascaded energy utilization. This process is carried out using a distillation unit, i.e., a distillation column.

[0003] However, current distillation columns typically have internal trays with only through-holes for the gaseous phase to rise, allowing contact only with the liquid at the top for the distillation process. This method has low contact efficiency, requires multiple material recirculations, and thus increases energy consumption. Utility Model Content

[0004] In view of the problems existing in the prior art, the purpose of this utility model is to provide a distillation device in the isobutanol production process to solve the problems in the background art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution;

[0006] A distillation apparatus for isobutanol production includes a distillation tank, a condenser, and a reboiler. The condenser is installed at the top of the distillation tank for circulating condensation of gaseous materials, and the reboiler is installed at the bottom of the distillation tank for circulating vaporization of liquid materials. A feed pipe is provided on the outside of the distillation tank, and vertically arranged flow guide baffles are fixedly installed inside the distillation tank. The flow guide baffles are provided with overflow slits, and overflow plates are fixedly connected to the overflow slits. Uniformly distributed air holes are opened on the flow guide baffles, and a flow equalization hood that matches the air holes is installed on the top of the flow guide baffles.

[0007] As a further description of the above scheme: the flow guide baffles are arranged in a continuous, staggered pattern from top to bottom along the height direction of the distillation tank.

[0008] As a further description of the above scheme: the flow equalization hood is a cylindrical hood, and the outer side of the flow equalization hood is provided with vertical holes arranged at equal intervals.

[0009] As a further description of the above solution: a flow guide block is fixedly connected to the top of the flow equalization hood, and the top and bottom of the flow guide block are provided with arc-shaped flow guide surfaces.

[0010] As a further description of the above scheme: the end of the feeding pipe located inside the distillation tank is connected to the flow guide baffle plate located in the middle.

[0011] As a further description of the above scheme: the opening ratio of the flow guide baffle is 11%.

[0012] Compared with existing technologies, the advantages of this utility model are:

[0013] This solution improves the contact efficiency between the gaseous substance and the raw liquid by setting a flow equalization hood on the flow guide baffle to further disperse the airflow. This results in the device having the advantages of high gas-liquid two-phase contact efficiency, improved distillation efficiency, and reduced equipment energy consumption. Attached Figure Description

[0014] Figure 1 This is a frontal cross-sectional view of the present invention.

[0015] Figure 2 for Figure 1 Enlarged schematic diagram of section A in the middle;

[0016] Figure 3 This is a partial three-dimensional cross-sectional structural diagram of the present invention;

[0017] Figure 4 This is a top view cross-sectional structural diagram of the present invention.

[0018] Explanation of the labels in the diagram:

[0019] 1. Distillation tank; 2. Condenser; 3. Reboiler; 4. Feed pipe; 5. Flow guide baffle; 6. Overflow notch; 7. Overflow plate; 8. Vent; 9. Flow equalization hood; 91. Flow guide block; 92. Arc-shaped flow guide surface; 10. Vertical hole. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model;

[0021] Please see Figure 1-4In this utility model, a distillation apparatus for isobutanol production includes a distillation tank 1, a condenser 2, and a reboiler 3. The condenser 2 is installed at the top of the distillation tank 1 for circulating condensation of gaseous materials, and the reboiler 3 is installed at the bottom of the distillation tank 1 for circulating vaporization of liquid materials. A feed pipe 4 is provided on the outside of the distillation tank 1, and vertically arranged flow guide baffles 5 are fixedly installed inside the distillation tank 1. An overflow cut 6 is provided on the flow guide baffles 5, and an overflow plate 7 is fixedly connected to the overflow cut 6. Uniformly distributed air holes 8 are opened on the flow guide baffles 5, and a flow equalization hood 9 that cooperates with the air holes 8 is installed on the top of the flow guide baffles 5.

[0022] In this invention, the distillation tank 1, in conjunction with the condenser 2 and reboiler 3, allows the raw liquid to undergo countercurrent gas-liquid two-phase contact with rising vapor inside the distillation tank 1. The light components are completely liquefied by the condenser 2 at the top of the distillation tank 1, and a portion is collected as the top product of the distillation tank 1 (the collection pipeline is not shown in the figure). The heavy components, after being condensed into a liquid state, are reintroduced onto the flow baffle 5 of the distillation tank 1. The recondensed liquid accumulates on the flow baffle 5, and flows downwards after the liquid level exceeds the overflow plate 7. Meanwhile, the bottom vapor flows upwards under pressure along the vent holes 8 on the flow baffle 5. This system achieves gas-liquid two-phase contact. Simultaneously, since the flow equalization hood 9 on the flow guide baffle 5 is completely submerged in the raw liquid, the raw liquid at the bottom is heated by the reboiler 3 to form steam, which rises and is dispersed by the flow equalization hood 9, achieving a more efficient contact with the raw liquid. Thus, the device possesses the advantages of high gas-liquid two-phase contact efficiency, improved distillation efficiency, and reduced equipment energy consumption. It solves the problem of existing technologies that generally only open through holes on the trays for the gaseous phase to rise and contact the liquid at the top for distillation, which has low contact efficiency, requires more material circulation times, and increases energy consumption.

[0023] Please see Figure 1 Among them, the flow guide baffles 5 are continuously and alternately arranged from top to bottom along the height direction of the distillation tank 1.

[0024] In this invention, by symmetrically arranging two adjacent flow guide baffles 5, the original liquid flows in an S-shape from the upper right to the lower right, thus extending the liquid flow path and increasing the gas-liquid contact time.

[0025] Please see Figure 2 and Figure 3 Among them, the flow equalization hood 9 is a cylindrical hood, and the outer side of the flow equalization hood 9 is provided with vertical holes 10 arranged at equal intervals.

[0026] In this invention, the vertical holes 10 on the outside of the flow equalization hood 9 make the rising gaseous phase more dispersed inside the original liquid, resulting in more uniform and efficient contact.

[0027] Please see Figure 2The top of the flow equalization hood 9 is fixedly connected to a flow guide block 91, and the top and bottom of the flow guide block 91 are provided with arc-shaped flow guide surfaces 92.

[0028] In this invention, the arc-shaped guide surfaces 92 at the top and bottom of the guide block 91 effectively enhance the dispersion and guidance effect of the gas inside the flow equalization hood 9, thus avoiding the generation of bubbles.

[0029] Please see Figure 1 The feeding pipe 4 is located inside the distillation tank 1, and its end is connected to the upper part of the guide baffle 5 located in the middle.

[0030] In this invention, the raw liquid is directly introduced into the flow baffle 5 connected to it through the end of the feeding pipe 4, so that the raw liquid enters the interior and directly enters a state of first aggregation and then flow.

[0031] Please see Figure 1 The perforation ratio of the flow guide baffle 5 is 11%.

[0032] In this invention, the opening ratio of the flow guide baffle 5 is 11%, which effectively ensures the contact rate of the gas-liquid two phases and guarantees the distillation efficiency.

[0033] The above description is merely a preferred embodiment of this utility model; however, the protection scope of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and its improved concept, should be included within the protection scope of this utility model.

Claims

1. A distillation apparatus for isobutanol production, comprising a distillation tank (1), a condenser (2), and a reboiler (3), wherein the condenser (2) is installed at the top of the distillation tank (1) for circulating condensation of gaseous materials, and the reboiler (3) is installed at the bottom of the distillation tank (1) for circulating vaporization of liquid materials, characterized in that: The distillation tank (1) is provided with a feeding pipe (4) on the outside. Vertically arranged flow guide baffles (5) are fixedly installed inside the distillation tank (1). The flow guide baffles (5) are provided with overflow cuts (6). An overflow plate (7) is fixedly connected to the overflow cuts (6). The flow guide baffles (5) are provided with uniformly distributed air holes (8). A flow equalization hood (9) that cooperates with the air holes (8) is installed on the top of the flow guide baffles (5).

2. The distillation apparatus for isobutanol production according to claim 1, characterized in that: The flow guide baffles (5) are arranged in a continuous staggered pattern from top to bottom along the height direction of the distillation tank (1).

3. The distillation apparatus for isobutanol production according to claim 1, characterized in that: The flow equalization hood (9) is a cylindrical hood, and the outer side of the flow equalization hood (9) is provided with vertical holes (10) arranged at equal intervals.

4. The distillation apparatus for isobutanol production according to claim 1, characterized in that: The top of the flow equalization hood (9) is fixedly connected to a flow guide block (91), and the top and bottom of the flow guide block (91) are provided with arc-shaped flow guide surfaces (92).

5. A distillation apparatus for isobutanol production according to claim 1, characterized in that: The feeding pipe (4) is located inside the distillation tank (1) at one end and is connected to the flow guide plate (5) located in the middle.

6. A distillation apparatus for isobutanol production according to claim 1, characterized in that: The opening ratio of the flow guide baffle (5) is 11%.

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