Heat exchange reactor

Abstract

The utility model discloses a heat exchange reactor, which relates to the technical field of reactors and comprises a shell pass shell, a first seal head and a second seal head are correspondingly arranged at two ends of the shell pass shell, a heat exchange tube bundle communicated with the first seal head and the second seal head is arranged in the shell pass shell, and a reaction material inlet and a reaction material outlet are arranged on the first seal head. A heat exchange medium inlet and a heat exchange medium outlet are formed in the shell pass shell; the first partition plate and the second partition plate are arranged in the first end socket to divide the first end socket into a first treatment area, a third treatment area and a fifth treatment area; the third partition plate is arranged in the second sealing head to divide the second sealing head into a second treatment area and a fourth treatment area, and the height position of the third partition plate is located between the first partition plate and the second partition plate; reaction materials flowing out of each vortex assembly correspondingly form vortexes in the first treatment area, the second treatment area, the third treatment area and the fourth treatment area. The heat exchange reactor solves the technical problems that an existing heat exchanger is poor in heat exchange efficiency and high in energy consumption, the heat exchange effect is improved, and the production cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of reactor technology, and in particular to a heat exchange reactor. Background Technology

[0002] In modern chemical industry, liquid-liquid phase reaction processes play a crucial role, widely used in key processes of organic chemical engineering such as nitration, sulfonation, and alkylation, as well as core production stages in polymer chemical engineering such as emulsion polymerization and suspension polymerization. It is worth noting that liquid-liquid phase reactions are usually accompanied by significant endothermic or exothermic phenomena. Therefore, effectively managing heat transfer during the reaction process and ensuring thorough mixing of reactants are key factors in improving reaction efficiency and product quality.

[0003] Traditional liquid-liquid reactors, such as the widely used mechanically stirred and jacketed batch reactors, while meeting the needs of industrial production to some extent, are increasingly showing their inherent limitations. Mechanical stirring, although enabling efficient mixing of reactants, consumes a lot of energy, increasing production costs. In addition, traditional jacketed reactors also have insufficient heat exchange efficiency.

[0004] Therefore, how to provide a heat exchange reactor that can achieve multiple efficient mixing of reactants, improve mixing uniformity, and promote rapid heat transfer is a technical problem that needs to be solved by those skilled in the art. Utility Model Content

[0005] The purpose of this invention is to provide a heat exchange reactor that solves the technical problems of poor heat exchange efficiency and high energy consumption in existing heat exchangers.

[0006] To achieve the above objectives, this utility model provides a heat exchange reactor, comprising:

[0007] The shell side has a first end cap and a second end cap sealed at both ends. The shell side cavity is provided with a heat exchange tube bundle that connects the first end cap and the second end cap. The first end cap is provided with a reactant inlet and a reactant outlet. The shell side has a heat exchange medium inlet and a heat exchange medium outlet.

[0008] The first and second partitions are arranged horizontally and parallelly inside the first head, dividing the first head into a first processing area, a third processing area and a fifth processing area from top to bottom.

[0009] The third partition is horizontally disposed inside the second head, dividing the second head into a second processing area and a fourth processing area from top to bottom. The height of the third partition is between the first partition and the second partition.

[0010] Vortex components are respectively disposed in the first processing zone, the second processing zone, the third processing zone and the fourth processing zone, and the reactants flowing out of each vortex component form vortices in the first processing zone, the second processing zone, the third processing zone and the fourth processing zone.

[0011] Preferably, the eddy current assembly includes:

[0012] The vortex pipe has one end located inside the head cavity and the second end passing through the head shell and connected to a flange. The flange is connected to the vortex material pipe. The vortex pipe located inside the head has multiple vortex components spaced at intervals along its length.

[0013] The vortex component includes outlet holes arranged at equal intervals around the outer circumference of the vortex pipe and multiple baffles inclinedly disposed on the outer circumference of the vortex pipe, with each baffle located outside the outlet hole.

[0014] Preferably, the baffle is an arc-shaped baffle, and the angle formed between the baffle and the vortex pipe is between 30 and 45°.

[0015] Preferably, the outlet hole is square in shape.

[0016] Preferably, a support base is provided on the inner wall of the end cap, and the first end of the vortex pipe is located on the upper surface of the support base.

[0017] Preferably, the first end of the vortex pipe is a closed end.

[0018] Preferably, the vortex material in the vortex material pipe is a single reactant or a mixture of multiple reactants in the reactant material.

[0019] Preferably, a plurality of baffles are provided inside the shell side of the outer casing to divide the heat exchange cavity of the shell side of the outer casing into heat exchange medium channels.

[0020] Preferably, the second end cap has an exhaust port at the top and a drain port at the bottom.

[0021] Compared to the aforementioned background technology, the present invention provides a heat exchange reactor in which the reactants enter the first processing zone through the reactant inlet, then flow sequentially through the heat exchange tube bundle to the second, third, and fourth processing zones, and finally reach the fifth processing zone and be discharged through the reactant outlet. During this process, the reactants form vortices under the action of the vortex assembly, enhancing the mixing and contact between the materials and improving the chemical reaction efficiency. Simultaneously, the heat exchange medium enters the space between the shell side and the heat exchange tube bundle through the heat exchange medium inlet, exchanging heat with the reactants through thermal conduction to regulate the reaction temperature.

[0022] Therefore, the heat exchange reactor provided in this application increases the heat exchange area and improves the heat exchange effect through the cooperation of the first baffle, the second baffle, the third baffle and the heat exchange tube bundle. Through the cooperation of the first baffle, the second baffle, the third baffle and the vortex assembly, the mixing and contact between materials are enhanced, the chemical reaction efficiency is improved, and the vortex assembly uses the flow of the reactants themselves to drive the generation of vortices, thereby reducing production costs. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of a heat exchange reactor structure provided in an embodiment of the present utility model;

[0025] Figure 2 for Figure 1 AA section view (partial view);

[0026] Figure 3 This is a magnified left-side view of the eddy current assembly provided in an embodiment of the present invention.

[0027] in:

[0028] 1-Shell side, outer shell; 2-First end cap; 3-Second end cap; 4-Heat exchange tube bundle; 5-Reactant material inlet; 6-Reactant material outlet; 7-Heat exchange medium inlet; 8-Heat exchange medium outlet; 9-First baffle; 10-Second baffle; 11-Third baffle; 12-Vortex assembly; 13-Vortex pipe; 14-Flange; 15-Vortex component; 16-Outlet hole; 17-Baffle plate; 18-Support seat; 19-Baffle plate; 20-Exhaust port; 21-Clean drain port. Detailed Implementation

[0029] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] See Figure 1 This application provides a heat exchange reactor, comprising a shell-side outer shell 1, with a first end cap 2 and a second end cap 3 sealed at both ends. A heat exchange tube bundle 4 communicating with the first end cap 2 and the second end cap 3 is provided within the shell-side outer shell 1 cavity. The first end cap 2 has a reactant inlet 5 and a reactant outlet 6, and the shell-side outer shell 1 has a heat exchange medium inlet 7 and a heat exchange medium outlet 8. A first partition 9 and a second partition 10 are arranged laterally and parallel within the first end cap 2, dividing the first end cap 2 into a first processing zone, a third processing zone, and a fifth processing zone from top to bottom. A third partition 11 is arranged laterally within the second end cap 3, dividing the second end cap 3 into a second processing zone and a fourth processing zone from top to bottom. The height of the third partition 11 is between the first partition 9 and the second partition 10. A vortex assembly 12 is correspondingly arranged within the first, second, third, and fourth processing zones, with the reactant flowing out of each vortex assembly 12 forming a vortex within the first, second, third, and fourth processing zones.

[0032] Specifically, the heat exchange medium inlet 7 is located at the top of the shell side outer shell 1, and the heat exchange medium outlet 8 is located at the bottom of the shell side outer shell 1, which is used to control the inflow and outflow of the heat exchange medium to regulate the reaction temperature.

[0033] The reactant inlet 5 is located at the top of the first end cap 2, and the reactant outlet 6 is located at the bottom of the first end cap 2 for introducing and discharging reactants. The first end cap 2 and the second end cap 3 are respectively sealed at both ends of the shell side outer shell 1 to ensure closed circulation of reactants. The heat exchange tube bundle 4 runs through the cavity of the shell side outer shell 1 and connects the first end cap 2 and the second end cap 3 to provide a continuous flow channel for reactants. The space between the tube wall of the heat exchange tube bundle 4 and the shell side outer shell 1 is filled with heat exchange medium. Through the heat conduction effect of the tube wall of the heat exchange tube bundle 4, heat exchange between reactants and heat exchange medium is realized.

[0034] With the first partition 9, the second partition 10, and the third partition 11 positioned between the first partition 9 and the second partition 10, the reactants first enter the first processing zone through the reactant inlet 5. The reactants in the first processing zone flow to the second processing zone through the heat exchange tube bundle 4. Similarly, the reactants in the second processing zone flow sequentially to the third processing zone, the fourth processing zone, and finally to the fifth processing zone. The reactants are then discharged through the reactant outlet 6, ensuring that the flow of the reactants is unidirectional along a predetermined path.

[0035] Vortex components 12 are provided in the first, second, third, and fourth processing zones to generate vortices in the corresponding areas. Vortices can enhance the local turbulence and improve the contact efficiency between materials, thereby increasing the chemical reaction rate and selectivity. The vortex components 12 use the flow of the reactants themselves to drive the generation of vortices, reducing the dependence on external mechanical stirring systems, reducing energy consumption, and thus reducing production costs.

[0036] Working principle:

[0037] The reactants enter the first processing zone through the reactant inlet, then flow sequentially through the heat exchange tube bundle to the second, third, and fourth processing zones, finally reaching the fifth processing zone and exiting through the reactant outlet. During this process, the reactants form vortices under the action of the vortex assembly, enhancing mixing and contact between the materials and improving chemical reaction efficiency. Simultaneously, the heat exchange medium enters the space between the shell and the heat exchange tube bundle through the heat exchange medium inlet, exchanging heat with the reactants through thermal conduction and regulating the reaction temperature.

[0038] Therefore, the heat exchange reactor provided in this application increases the heat exchange area and improves the heat exchange effect through the cooperation of the first baffle, the second baffle, the third baffle and the heat exchange tube bundle. Through the cooperation of the first baffle, the second baffle, the third baffle and the vortex assembly, the mixing and contact between materials are enhanced, and the chemical reaction efficiency is improved. Furthermore, the vortex assembly 12 uses the flow of the reactants themselves to drive the generation of vortices, reducing the dependence on external mechanical stirring systems, reducing energy consumption, and thus reducing production costs.

[0039] See Figure 2-3 Since the eddy current components 12 in the first, second, third, and fourth processing zones all have the same structure, this embodiment will focus on the eddy current component 12 located in the first processing zone:

[0040] The vortex assembly 12 includes a vortex pipe 13, with one end located inside the head cavity and the second end passing through the head shell and connected to a flange 14. The flange 14 is connected to the vortex material pipe. The vortex pipe 13 located inside the head is provided with a plurality of vortex components 15 at intervals along its length. The vortex component 15 includes an outlet hole 16 arranged at equal intervals around the outer circumference of the vortex pipe 13 and a plurality of baffles 17 inclinedly arranged on the outer circumference of the vortex pipe 13. Each baffle 17 is located outside the outlet hole 16. The vortex material in the vortex material pipe is a single reactant or a mixture of multiple reactants in the reactant material.

[0041] Specifically, the first end of the vortex pipe 13 is located in the cavity of the first processing area of ​​the first end cap 2 and is in direct contact with the reactant; the second end passes through the shell of the first end cap 2 and is connected to the flange 14. The flange 14 is the connecting part between the vortex pipe 13 and the vortex material pipe, ensuring that the reactant can flow smoothly from the vortex material pipe into the vortex pipe 13.

[0042] The vortex components 15 are spaced apart along the length of the vortex pipe 13, and their number and position are selected to achieve the best vortex effect.

[0043] The outlet holes 16 are arranged at equal intervals around the outer circumference of the vortex pipe 13, serving as channels for the reactants to flow out of the vortex pipe 13. The baffles 17 are inclinedly arranged on the outer circumference of the vortex pipe 13, with each baffle 17 located outside the outlet hole 16. The function of the baffles 17 is to change the flow direction of the reactants, causing them to generate tangential velocity on the contact surface with the baffles 17, thereby forming a vortex.

[0044] The vortex material in the vortex material pipeline is a single reactant or a mixture of multiple reactants in the reactant material, thus having a wide range of applications.

[0045] Specifically, the baffle 17 is an arc-shaped baffle 17 with its inwardly curved surface facing the outlet hole 16. Compared with the traditional flat baffle, the arc-shaped baffle 17 can guide the flow of reactants more smoothly. The inwardly curved surface of the arc-shaped baffle facing the outlet hole 16 allows the material to change its flow direction more smoothly when it flows through the baffle, reducing flow resistance and enhancing vortex formation.

[0046] The angle between the baffle 17 and the vortex pipe 13 is between 30° and 45°. This angle range ensures that the reactants generate sufficient tangential velocity as they flow through the baffle, thereby forming a stable and strong vortex.

[0047] The shape of the outlet orifice 16 has been optimized to be rectangular. The rectangular outlet orifice can better control the outflow speed and direction of the reactants, making the formation of vortices more uniform and stable.

[0048] Based on the above embodiments, a support base 18 is provided on the inner wall of the first end cap 2, and the first end of the vortex pipe 13 ( Figure 2 The right end of the vortex pipe 13 is located on the upper surface of the support 18. The first end of the vortex pipe 13 is a closed end. Specifically, the first end of the vortex pipe 13 is a closed end, and the reactant flows out of the outlet hole 16 at a faster speed, which can form a strong vortex.

[0049] Based on the above embodiments, a plurality of baffles 19 are provided inside the shell side outer shell 1 to divide the heat exchange cavity of the shell side outer shell 1 into heat exchange medium channels, thereby improving the heat exchange efficiency.

[0050] Specifically, the second end cap 3 has an exhaust port 20 at the top and a drain port 21 at the bottom.

[0051] This application provides a heat exchange reactor for preparing oxalamide (oxalamide is a slow-release fertilizer; industrially, oxalamide is prepared by reacting a methanol solution of dimethyl oxalate and a methanol solution of liquid ammonia to generate oxalamide and methanol) as an example for detailed illustration:

[0052] Since eddy current components 12 are provided in the first processing zone, the second processing zone, the third processing zone and the fourth processing zone, the eddy current component 12 located in the first processing zone is named the first eddy current component, the eddy current component 12 located in the second processing zone is named the second eddy current component, the eddy current component 12 located in the third processing zone is named the third eddy current component, and the eddy current component 12 located in the fourth processing zone is named the fourth eddy current component.

[0053] Ammonia in methanol solution enters the first treatment zone through the first vortex assembly. Dimethyl oxalate in methanol solution enters the first treatment zone from the reactant inlet 5. Ammonia in methanol solution flows out from the outlet hole 16 and draws the surrounding fluid to collide with the baffle plate 17. Under the action of the baffle plate 17, the fluid changes direction and forms a vortex. The vortex drives the mixing of dimethyl oxalate and ammonia. While reacting, they flow along the heat exchange tube bundle 4, passing through the second, third, and fourth treatment zones. They are further mixed with the ammonia in methanol solution under the mixing and stirring action of the second, third, and fourth vortex assemblies, respectively, until they flow out of the heat exchange reactor from the reactant outlet 6 of the fifth treatment zone.

[0054] The first vortex assembly receives 40% of the total ammonia-methanol solution volume, while the second, third, and fourth vortex assemblies each receive 20% of the total ammonia-methanol solution volume.

[0055] The volume of ammonia-methanol solution flowing into the first vortex assembly accounts for 40% of the total ammonia-methanol solution volume, while the volumes of ammonia-methanol solution flowing into the second, third, and fourth vortex assemblies each account for 20% of the total ammonia-methanol solution volume.

[0056] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0057] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principles of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A heat exchange reactor, characterized in that, include: The shell side outer shell (1) is sealed at both ends with a first end cap (2) and a second end cap (3). The shell side outer shell (1) cavity is provided with a heat exchange tube bundle (4) that connects the first end cap (2) and the second end cap (3). The first end cap (2) is provided with a reactant inlet (5) and a reactant outlet (6). The shell side outer shell (1) is provided with a heat exchange medium inlet (7) and a heat exchange medium outlet (8). The first partition (9) and the second partition (10) are arranged horizontally and parallel inside the first end cap (2), so that the first end cap (2) is divided into a first processing area, a third processing area and a fifth processing area from top to bottom; The third partition (11) is arranged horizontally inside the second end cap (3), so that the second end cap (3) is divided into a second processing area and a fourth processing area from top to bottom. The height of the third partition (11) is between the first partition (9) and the second partition (10). Vortex components (12) are respectively disposed in the first processing zone, the second processing zone, the third processing zone and the fourth processing zone. The reactants flowing out of each vortex component (12) form vortices in the first processing zone, the second processing zone, the third processing zone and the fourth processing zone.

2. The heat exchange reactor according to claim 1, characterized in that, The eddy current assembly (12) includes: The vortex pipe (13) has its first end located inside the head cavity and its second end passing through the head shell and connected to the flange (14). The flange (14) is connected to the vortex material pipe. The vortex pipe (13) located inside the head has multiple vortex components (15) spaced apart along its length. The vortex component (15) includes an outlet hole (16) arranged at equal intervals around the outer circumference of the vortex pipe (13) and a plurality of baffles (17) inclinedly arranged on the outer circumference of the vortex pipe (13), with each baffle (17) located on the outside of the outlet hole (16).

3. A heat exchange reactor according to claim 2, characterized in that, The baffle plate (17) is an arc-shaped baffle plate, and the angle formed between the baffle plate (17) and the vortex pipe (13) is 30-45°.

4. A heat exchange reactor according to claim 3, characterized in that, The outlet hole (16) is square in shape.

5. A heat exchange reactor according to claim 2, characterized in that, The inner wall of the end cap is provided with a support seat (18), and the first end of the vortex pipe (13) is located on the upper surface of the support seat (18).

6. A heat exchange reactor according to claim 2, characterized in that, The first end of the vortex pipe (13) is a closed end.

7. A heat exchange reactor according to claim 2, characterized in that, The vortex material in the vortex material pipeline is a single reactant or a mixture of multiple reactants in the reactant material.

8. A heat exchange reactor according to claim 1, characterized in that, The shell-side outer casing (1) is provided with multiple baffles (19) to divide the heat exchange cavity of the shell-side outer casing (1) into heat exchange medium channels.

9. A heat exchange reactor according to claim 1, characterized in that, The second end cap (3) has an exhaust port (20) at the top and a drain port (21) at the bottom.

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