A reactive distillation column for esterification

Abstract

This utility model relates to the field of esterification reaction technology, and more particularly to a reactive distillation column for esterification. The technical solution includes a column body with multiple inspection ports on the front for subsequent maintenance. Each inspection port has a closure door on its front. The column body contains multiple trays for providing a gas-liquid interface. Each tray has multiple gas riser holes on its surface. The top of each tray has multiple trapezoidal protrusions to increase the mass transfer area. Above the trays are multiple sets of arc-shaped baffles to reduce mist entrainment. Each set of trapezoidal protrusions has gas-phase injection holes inclined at 45 degrees on both sides. This utility model, through the arrangement of trapezoidal protrusions, gas-phase injection holes, and arc-shaped baffles, can force intense turbulence between the gas and liquid phases within the gaps between the protrusions, increasing the mass transfer area and improving separation efficiency. Simultaneously, it can utilize the principle of inertial collision to capture the liquid phase in the gas phase, reducing mist entrainment and improving product purity.

Description

Technical Field

[0001] This utility model relates to the field of esterification reaction technology, and in particular to a reactive distillation column for esterification. Background Technology

[0002] In the field of chemical production, esterification is a crucial type of organic chemical reaction, widely used in the synthesis of numerous products such as fragrances, coatings, and pharmaceutical intermediates. Plate distillation columns, as key equipment for separating and purifying products after esterification, directly impact product quality and production efficiency.

[0003] Because existing trays have a single flow path for both the gas and liquid phases during use, the mass transfer area is limited, which reduces the separation efficiency. Furthermore, when the gas flow rate is high, it is easy to carry the liquid phase, which will cause a decrease in the purity of the product at the top of the column. In view of the above reasons, this application proposes a reactive distillation column for esterification. Utility Model Content

[0004] The purpose of this invention is to address the problems existing in the background art by proposing a reactive distillation column for esterification.

[0005] The technical solution of this utility model is as follows: a reactive distillation column for esterification, comprising a column body, the front of which is provided with multiple inspection ports for subsequent maintenance, the front of which is provided with an inspection door for sealing, the column body being provided with multiple trays for providing a gas-liquid contact interface, the surface of which is provided with multiple gas rise holes, the top of which is provided with multiple trapezoidal protrusions to increase the mass transfer area, and the top of which is provided with multiple sets of arc-shaped baffles for reducing mist entrainment.

[0006] Optionally, each trapezoidal protrusion has a gas injection hole at an inclination of 45 degrees on both sides, and the diameter of the gas injection hole is 3-5 mm.

[0007] Optionally, the height of the trapezoidal protrusion is 5-10 mm, the bottom width of the trapezoidal protrusion is 10-15 mm, and the top width of the trapezoidal protrusion is 5-8 mm.

[0008] Optionally, a fixing frame is fixedly provided at the bottom of the plurality of arc-shaped baffles, and an mounting frame is fixedly provided at the bottom of the fixing frame, and a connecting structure is provided between the mounting frame and the tower plate.

[0009] Optionally, the connection structure includes a base for fixing, with positioning holes on both inner walls of the base, a mounting block movably disposed inside the base, positioning rods movably disposed on both sides of the mounting block, the positioning rods being adapted to the positioning holes, a vertical rod fixedly disposed on the top of the mounting block, and the top end of the vertical rod being fixedly connected to the bottom of the fixing frame.

[0010] Optionally, the mounting block has storage holes on both sides, a spring is fixedly installed in the storage hole, a guide plate is fixedly installed at the other end of the spring, and one side of the guide plate is fixedly connected to one end of the positioning rod.

[0011] Optionally, the inner wall of the receiving hole is provided with two limiting grooves, and two limiting blocks are fixedly provided on the outside of the guide plate, with the limiting blocks and limiting grooves being movably connected.

[0012] Compared with the prior art, the present invention has the following beneficial technical effects:

[0013] 1. This utility model, through the setting of trapezoidal protrusions, meteorological injection holes and arc-shaped baffles, can force the gas and liquid to violently turbulently in the gap between the protrusions, increase the mass transfer area and improve the separation efficiency. At the same time, it can also use the principle of inertial collision to capture the liquid phase in the gas phase, reduce mist entrainment and improve product purity.

[0014] 2. This utility model, through the setting of base, vertical rod, positioning hole, positioning rod and mounting block, can realize the quick disassembly of arc-shaped baffle and fixed frame, which facilitates the subsequent maintenance of equipment. Attached Figure Description

[0015] Figure 1 A three-dimensional structural schematic diagram of this utility model is provided;

[0016] Figure 2 A three-dimensional structural diagram of the tower plate in this utility model is provided;

[0017] Figure 3 A three-dimensional structural schematic diagram of the baffle-type mist eliminator in this utility model is provided;

[0018] Figure 4 A three-dimensional schematic diagram of the connection structure in this utility model is provided.

[0019] Figure label:

[0020] 1. Tower body;

[0021] 2. Inspection port;

[0022] 3. Inspection door;

[0023] 4. Trays;

[0024] 5. Air vent;

[0025] 6. Trapezoidal protrusion;

[0026] 7. Gas phase injection hole;

[0027] 8. Arc-shaped baffles;

[0028] 9. Fixture;

[0029] 10. Mounting bracket;

[0030] 11. Connecting structure; 111. Base; 112. Vertical rod; 113. Positioning hole; 114. Mounting block; 115. Storage hole; 116. Spring; 117. Guide plate; 118. Positioning rod. Detailed Implementation

[0031] The technical solutions of this disclosure will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments.

[0032] The components of the embodiments of this disclosure, which are typically described and shown in the accompanying drawings, can be arranged and designed in a variety of different configurations. Therefore, the following detailed description of embodiments of this disclosure provided in the drawings is not intended to limit the scope of the claimed disclosure, but merely to illustrate selected embodiments of the disclosure.

[0033] All other embodiments obtained by those skilled in the art based on the embodiments in this disclosure without inventive effort are within the scope of protection of this disclosure.

[0034] In the description of this disclosure, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "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 disclosure 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 disclosure.

[0035] In the description of this disclosure, it should be noted that, unless otherwise expressly specified and limited, the terms "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 between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.

[0036] Example

[0037] like Figure 1-4As shown, the present invention proposes a reactive distillation column for esterification, comprising a column body 1. The front of the column body 1 has multiple inspection ports 2 for subsequent maintenance, and the front of each inspection port 2 has a maintenance door 3 for closure. Inside the column body 1 are multiple trays 4 for providing a gas-liquid interface. The surface of each tray 4 has multiple gas riser holes 5 for gas to pass through. The top of each tray 4 has multiple trapezoidal protrusions 6 to increase the mass transfer area. The height of each trapezoidal protrusion 6 is 8 mm, the base width is 15 mm, and the top width is 5 mm. The trapezoidal cross-section, narrower at the top and wider at the bottom, prevents liquid from accumulating at the top. Each trapezoidal protrusion 6 has a 45-degree inclined gas jet hole 7 on both sides. The inclined gas jet hole 7 can form a gas phase "opposing jet" structure, forcing the gas and liquid to turbulently move within the gap between the protrusions, increasing the mass transfer area and improving the separation efficiency. The diameter of the gas jet hole 7 is 4 mm. Above the tray 4, there are multiple sets of arc-shaped baffles 8 for reducing mist entrainment. The arc-shaped baffles 8 can capture the liquid phase in the gas phase using the principle of inertial collision, reducing mist entrainment and improving product purity.

[0038] A fixing frame 9 is fixedly mounted on the bottom of multiple arc-shaped baffles 8. A mounting frame 10 is fixedly mounted on the bottom of the fixing frame 9. A connecting structure 11 is provided between the mounting frame 10 and the tower plate 4. The connecting structure 11 includes a base 111 for fixing. Positioning holes 113 are provided on both inner walls of the base 111. The positioning holes 113 are used to accommodate positioning rods 118 to lock the mounting block 114. The mounting block 114 is movably mounted inside the base 111. Positioning rods 118 are movably mounted on both sides of the mounting block 114. A receiving hole 115 is provided on both sides of the mounting block 114. A spring 116 is fixedly provided, and a guide plate 117 is fixedly provided at the other end of the spring 116. Two limiting grooves are provided on the inner wall of the receiving hole 115. Two limiting blocks are fixedly provided on the outside of the guide plate 117. The cooperation of the guide plate 117, the limiting blocks and the limiting grooves can improve the stability of the positioning rod 118 when it extends and retracts. The limiting blocks and the limiting grooves are movably connected. One side of the guide plate 117 is fixedly connected to one end of the positioning rod 118. The positioning rod 118 is adapted to the positioning hole 113. A vertical rod 112 is fixedly provided on the top of the mounting block 114. The top end of the vertical rod 112 is fixedly connected to the bottom of the fixing frame 9.

[0039] In this embodiment, the inspection port 2 and inspection door 3 facilitate subsequent maintenance of the components inside the tower. During use, liquid, gas, or a gas-liquid mixture is introduced into the tower. The liquid, gas, or gas-liquid mixture rises through the riser hole 5 and enters the space at the bottom of the trapezoidal protrusion 6. Due to the narrowing of the flow channel, the airflow accelerates, and the high-speed airflow is ejected obliquely through the gas injection holes 7 on both sides, forming a counter-jet zone between adjacent rows of protrusions. This forces the gas and liquid to undergo intense turbulence within the gaps between the protrusions, increasing the mass transfer area and improving separation efficiency. Multiple arc-shaped baffles 8 above the tower plate 4 can capture the liquid phase in the gas phase using the principle of inertial collision, reducing mist entrainment and improving product purity. When subsequent disassembly and maintenance of the arc-shaped baffles 8 are required, both sets of positioning rods 118 are simultaneously pushed inwards. Pressing down causes the positioning rod 118 to compress the spring 116. When the positioning rod 118 is fully retracted into the receiving hole 115, the fixing frame 9 is pulled upward. The fixing frame 9 drives the vertical rod 112, which in turn drives the mounting block 114. When the mounting block 114 is removed from the base 111, the arc-shaped baffle 8 is disassembled. During installation, the two sets of positioning rods 118 are pressed inward. When the positioning rod 118 is fully retracted into the receiving hole 115, the mounting block 114 is inserted into the base 111. When the positioning rod 118 moves to the position of the positioning hole 113, the spring 116 causes the positioning rod 118 to reset and pop out from the positioning hole 113, thus positioning the mounting block 114 and completing the installation of the arc-shaped baffle 8.

[0040] The above specific embodiments are merely several optional embodiments of this utility model. Based on the technical solution of this utility model and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A reactive distillation column for esterification, comprising a column body (1), wherein the front of the column body (1) is provided with a plurality of inspection ports (2) for subsequent maintenance, and the front of the inspection ports (2) is provided with inspection doors (3) for closure; the column body (1) is provided with a plurality of trays (4) for providing a gas-liquid contact interface, and the surface of the trays (4) is provided with a plurality of gas riser holes (5), characterized in that: The top of the tray (4) is provided with multiple trapezoidal protrusions (6) to increase the mass transfer area, and the top of the tray (4) is provided with multiple sets of arc-shaped baffles (8) for reducing mist entrainment.

2. The reactive distillation column for esterification according to claim 1, characterized in that, Each trapezoidal protrusion (6) has a gas phase injection hole (7) at an inclination of 45 degrees on both sides, and the diameter of the gas phase injection hole (7) is 3-5 mm.

3. The reactive distillation column for esterification according to claim 1, characterized in that, The height of the trapezoidal protrusion (6) is 5-10 mm, the bottom width of the trapezoidal protrusion (6) is 10-15 mm, and the top width of the trapezoidal protrusion (6) is 5-8 mm.

4. The reactive distillation column for esterification according to claim 1, characterized in that, A fixing frame (9) is fixedly provided at the bottom of the multiple arc-shaped baffles (8), and an installation frame (10) is fixedly provided at the bottom of the fixing frame (9). A connection structure (11) is provided between the installation frame (10) and the tower plate (4).

5. A reactive distillation column for esterification according to claim 4, characterized in that, The connecting structure (11) includes a base (111) for fixing. Positioning holes (113) are provided on both inner walls of the base (111). An installation block (114) is movably provided inside the base (111). Positioning rods (118) are movably provided on both sides of the installation block (114). The positioning rods (118) and the positioning holes (113) are adapted to each other. A vertical rod (112) is fixedly provided on the top of the installation block (114). The top of the vertical rod (112) is fixedly connected to the bottom of the fixing frame (9).

6. A reactive distillation column for esterification according to claim 5, characterized in that, The mounting block (114) has storage holes (115) on both sides. A spring (116) is fixedly installed in the storage hole (115). A guide plate (117) is fixedly installed at the other end of the spring (116). One side of the guide plate (117) is fixedly connected to one end of the positioning rod (118).

7. A reactive distillation column for esterification according to claim 6, characterized in that, The inner wall of the receiving hole (115) is provided with two limiting grooves, and the outside of the guide plate (117) is fixedly provided with two limiting blocks, and the limiting blocks and limiting grooves are movably connected.

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