A cooling assembly for an esterification reactor

Abstract

The utility model discloses a cooling assembly for esterification reation kettle relates to the technical field of reation kettle, the utility model discloses a tank inner support, inner ring coil pipe and outer ring coil pipe, and inner ring coil pipe and outer ring coil pipe are all spiral heat exchange pipe structure, and inner ring coil pipe and outer ring coil pipe are coaxially arranged, and the center axis of pipeline section is at the same horizontal plane in width direction, and the tank inner support is by four partial frame bodies, and four partial frame bodies are annular and evenly arranged on inner ring coil pipe and outer ring coil pipe, and partial frame body includes upper fixed part and tank bottom connecting plate. The utility model discloses the design of inner ring coil pipe and outer ring coil pipe of coaxial arrangement can form double -layer spiral heat exchange channel, and the heat exchange area is increased significantly, and the heat exchange efficiency is improved, and meanwhile, inner ring coil pipe can strengthen cooling to high temperature reaction liquid core area, and outer ring coil pipe covers the area near kettle wall, avoids the edge heat accumulation, guarantees the cooling uniformity.

Description

Technical Field

[0001] This utility model belongs to the field of reaction vessel technology, and in particular relates to a cooling component for an esterification reaction vessel. Background Technology

[0002] Esterification is a common exothermic reaction in chemical production. The reaction process is usually accompanied by the release of a large amount of heat. If the heat cannot be removed in time, it may lead to uncontrolled reaction (local overheating may trigger etherification or degradation reactions), catalyst deactivation (high temperature causes acidic catalysts such as concentrated sulfuric acid and p-toluenesulfonic acid to sinter or decompose), and the accumulation of thermal stress may damage the reactor lining or sealing structure.

[0003] Currently, the main cooling methods for esterification reactors are:

[0004] 1. Jacketed cooling: The heat exchange area is limited, and the cooling is uneven when the diameter of the vessel is large (the edges cool faster and the center cools slower).

[0005] 2. Single-layer coil cooling: The spiral coil is directly immersed in the reaction liquid, but it is limited by the length and diameter of the tube, resulting in insufficient heat exchange capacity. In addition, the coil is prone to deformation due to fluid agitation or solid deposit accumulation.

[0006] 3. External circulation cooling: requires additional heat exchangers and pump sets, resulting in high energy consumption and a complex system.

[0007] Similarly, for cooling methods of internal coils, since the agitator is the core component in the esterification reactor, it is usually installed at the center of the reactor to enhance the mixing and heat transfer of the reactants. However, the eddies and radial flows generated by the agitator can significantly affect the stability of the cooling components.

[0008] Therefore, designing a cooling component that can cool efficiently and with high stability is a problem that needs to be solved by those skilled in the art. Summary of the Invention

[0009] The purpose of this invention is to provide a cooling assembly for an esterification reactor. By using an inner and outer coil arranged coaxially, a double-layer spiral heat exchange channel can be formed, which significantly increases the heat exchange area and improves the heat exchange efficiency. At the same time, the inner coil can enhance cooling of the core area of ​​the high-temperature reaction liquid, while the outer coil covers the area near the reactor wall to avoid heat accumulation at the edges and ensure uniform cooling.

[0010] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0011] This utility model is a cooling assembly for an esterification reactor, including an internal support, an inner coil, and an outer coil.

[0012] Both the inner and outer coils are spiral heat exchanger tube structures, and the inner and outer coils are coaxially arranged. The central axes of the pipe sections of the inner and outer coils are on the same horizontal plane in the width direction.

[0013] The tank internal support consists of four sub-frames, which are arranged in a ring at even intervals on the inner and outer coils.

[0014] The subframe includes an upper fixing component and a tank bottom connecting plate;

[0015] The upper fixing component is composed of a main iron and a secondary angle iron that are welded together in an L-shape and have the same length. The end of the main iron and the secondary angle iron away from the connection point is provided with a tank wall connecting plate with an arc structure.

[0016] The tank bottom connecting plate is an arc-shaped plate and is located directly below the main iron. From the inside to the outside, the main iron and the tank bottom connecting plate are fixed with an inner vertical edge, a vertical plate and a vertical angle iron.

[0017] The inner vertical edge, vertical plate, and vertical angle iron are provided with several partition strips from top to bottom on the front side. Two rows of vertically arranged through holes are formed between the inner vertical edge, vertical plate, vertical angle iron, and several partition strips. Several layers of pipes of the inner coil pass through one row of through holes, and several layers of pipes of the outer coil pass through the other row of through holes.

[0018] Furthermore, the secondary angle irons on the sub-frame are linearly distributed with the main irons on one adjacent side of the sub-frame, and the secondary angle irons on the sub-frame are parallel to the main irons on another adjacent side of the sub-frame.

[0019] Furthermore, both the inner and outer coils are connected to an output tube with a horizontal tube structure at their top ends, and the height of the output tube of the inner coil is higher than the height of the output tube on the outer coil.

[0020] Furthermore, both the inner and outer coils are connected to an input pipe at their bottom ends, and the input pipes are all vertical pipe structures arranged downwards.

[0021] Furthermore, the inner vertical side is a plate with an included angle of 135 degrees. One side of the inner vertical side is fixed to the main iron and distributed parallel to the vertical plate, while the other side of the inner vertical side faces the spiral axis of the inner and outer coils.

[0022] Furthermore, each of the main iron and the secondary angle iron has a 45-degree cut at one end where they are connected, and the connecting line of the main iron and the secondary angle iron is oriented toward the spiral axis of the inner and outer coils.

[0023] This utility model has the following beneficial effects:

[0024] 1. This utility model, through the design of coaxially arranged inner and outer coils, can form a double-layer spiral heat exchange channel, which significantly increases the heat exchange area and improves the heat exchange efficiency. At the same time, the inner coil can enhance cooling for the core area of ​​the high-temperature reaction liquid, while the outer coil covers the area near the vessel wall, avoiding heat accumulation at the edges and ensuring uniform cooling.

[0025] 2. This utility model uses four sub-frames to form an inner and outer coil for fixing to the reactor, which can form a ring-shaped force-bearing frame, distribute a certain load, and improve stability. At the same time, the design of the spacers on the sub-frames can simultaneously support each layer of outer coil and each layer of inner coil, which greatly improves the positional stability of the cooling components.

[0026] 3. This utility model, through the design of the inner vertical plate on the frame, with a 135-degree angle, causes one side of the inner vertical plate to face the spiral axis of the inner and outer coils. This can disperse the radial flow and eddy current impact caused by the agitator, avoid impact on the support, inner and outer coils, reduce vibration problems, improve the positional stability of the cooling components, and ensure their performance.

[0027] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0028] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the structure of a cooling assembly for an esterification reactor according to the present invention;

[0030] Figure 2 This is a schematic diagram of the subframe structure;

[0031] Figure 3 This is a cross-sectional view of the structure of the inner and outer coils of this utility model at the spiral axis.

[0032] The attached diagram lists the components represented by each number as follows:

[0033] 1-Inner ring coil, 2-Outer ring coil, 3-Sub-frame, 101-Output end pipe, 102-Input end pipe, 301-Main iron, 302-Tank bottom connecting plate, 303-Secondary angle iron, 304-Tank wall connecting plate, 305-Inner vertical edge, 306-Vertical plate, 307-Vertical angle iron, 308-Spacer strip. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0035] Please see Figure 1-3 As shown, this utility model is a cooling assembly for an esterification reactor, including an inner support, an inner coil 1, and an outer coil 2.

[0036] Both the inner coil 1 and the outer coil 2 are spiral heat exchanger tube structures. The inner coil 1 and the outer coil 2 are coaxially arranged, and the central axes of the pipe sections of the inner coil 1 and the outer coil 2 are on the same horizontal plane in the width direction.

[0037] The internal support of the tank consists of four sub-frames 3, which are arranged in a ring at even intervals on the inner coil 1 and the outer coil 2.

[0038] The subframe 3 includes an upper fixing component and a tank bottom connecting plate 302;

[0039] The upper fixing component is composed of a main iron 301 and a secondary angle iron 303 that are welded together in an L-shape and have the same length. Both the main iron 301 and the secondary angle iron 303 have an arc-shaped tank wall connecting plate 304 at the end away from the connection point.

[0040] The bottom connecting plate 302 is an arc-shaped plate and is located directly below the main iron 301. The main iron 301 and the bottom connecting plate 302 are fixed with an inner vertical edge 305, a vertical plate 306 and a vertical angle iron 307 from the inside to the outside.

[0041] The inner vertical edge 305, vertical plate 306 and vertical angle iron 307 are provided with several partition strips 308 from top to bottom on the front side. Two rows of vertically arranged through holes are formed between the inner vertical edge 305, vertical plate 306, vertical angle iron 307 and several partition strips 308. Several layers of pipes of the inner coil 1 pass through one row of through holes, and several layers of pipes of the outer coil 2 pass through the other row of through holes.

[0042] Among them, such as Figure 1 As shown, the secondary angle iron 303 on the sub-frame 3 is linearly distributed with the main iron 301 on one adjacent side of the sub-frame 3, and the secondary angle iron 303 on the sub-frame 3 is parallel to the main iron 301 on another adjacent side of the sub-frame 3.

[0043] Among them, such as Figure 1As shown, both the inner coil 1 and the outer coil 2 are connected to the top of an output tube 101 with a horizontal tube structure. The height of the output tube 101 of the inner coil 1 is higher than the height of the output tube 101 on the outer coil 2.

[0044] Among them, such as Figure 1 As shown, both the inner coil 1 and the outer coil 2 are connected to an input pipe 102 at their bottom ends. The input pipes 102 are both vertical pipe structures and are arranged downwards.

[0045] Among them, such as Figure 1-2 As shown, the inner vertical side 305 is a plate with an included angle of 135 degrees. One side of the inner vertical side 305 is fixed to the main iron 301 and is distributed parallel to the vertical plate 306. The other side of the inner vertical side 305 faces the spiral axis of the inner coil 1 and the outer coil 2.

[0046] Among them, such as Figure 1-2 As shown, the ends of the main iron 301 and the secondary angle iron 303 connected are both provided with 45-degree cuts, and the connecting line of the main iron 301 and the secondary angle iron 303 is oriented towards the spiral axis of the inner coil 1 and the outer coil 2.

[0047] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0048] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A cooling assembly for an esterification reactor, characterized by: It comprises a bracket in the tank, an inner coil pipe (1) and an outer coil pipe (2); The inner coil pipe (1) and the outer coil pipe (2) are both spiral heat exchange pipe structures, the inner coil pipe (1) and the outer coil pipe (2) are coaxially arranged, and the center axes of the pipe sections of the inner coil pipe (1) and the outer coil pipe (2) are in the same horizontal plane in the width direction; The bracket in the tank is composed of four sub-frames (3), the four sub-frames (3) are arranged in a ring shape and uniformly spaced on the inner coil pipe (1) and the outer coil pipe (2); The sub-frame (3) comprises an upper fixing member and a tank bottom connecting plate (302); The upper fixing member is composed of a main corner iron (301) and a secondary corner iron (303) which are welded and connected in an L shape and have the same length, and the tank wall connecting plates (304) with arc structures are arranged at the ends of the main corner iron (301) and the secondary corner iron (303) away from the connecting point; The tank bottom connecting plate (302) is an arc-shaped plate body and is arranged directly below the main corner iron (301), and the inner vertical edge (305), the vertical plate (306) and the vertical corner iron (307) are sequentially fixed between the main corner iron (301) and the tank bottom connecting plate (302) from inside to outside; A plurality of partition strips (308) are sequentially arranged from top to bottom on the front side of the inner vertical edge (305), the vertical plate (306) and the vertical corner iron (307), two rows of vertically arranged through holes are formed between the inner vertical edge (305), the vertical plate (306), the vertical corner iron (307) and the plurality of partition strips (308), a plurality of layers of pipe lines of the inner coil pipe (1) respectively pass through one row of through holes, and a plurality of layers of pipe lines of the outer coil pipe (2) respectively pass through the other row of through holes.

2. The cooling assembly for an esterification reactor according to claim 1, wherein The secondary corner iron (303) on the sub-frame (3) is linearly distributed with the main corner iron (301) of the sub-frame (3) on one adjacent side, and the secondary corner iron (303) on the sub-frame (3) is parallelly distributed with the main corner iron (301) of the sub-frame (3) on the other adjacent side.

3. The cooling assembly for an esterification reactor according to claim 1, wherein The top ends of the inner coil pipe (1) and the outer coil pipe (2) are connected with output end pipes (101) of a horizontal pipe structure, the height of the output end pipe (101) of the inner coil pipe (1) is higher than the height of the output end pipe (101) on the outer coil pipe (2).

4. The cooling assembly for an esterification reactor according to claim 1, wherein The bottom ends of the inner coil pipe (1) and the outer coil pipe (2) are connected with input end pipes (102), and the input end pipes (102) are all vertical pipe structures and are arranged downward.

5. The cooling assembly for an esterification reactor according to claim 1, wherein The inner vertical edge (305) is a plate body with an included angle of 135 degrees, one side edge of the inner vertical edge (305) is fixed on the main corner iron (301) and is parallelly distributed with the vertical plate (306), and the other side edge of the inner vertical edge (305) faces the spiral axis of the inner coil pipe (1) and the outer coil pipe (2).

6. The cooling assembly for an esterification reactor according to claim 1, wherein The ends of the main corner iron (301) and the secondary corner iron (303) connected with each other are both provided with 45-degree notches, and the connecting lines of the main corner iron (301) and the secondary corner iron (303) face the spiral axis of the inner coil pipe (1) and the outer coil pipe (2).

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