A tubular reactor based on multi-cylinder linkage and steam deflection reinforcement

Abstract

The utility model provides a kind of based on multi-cylinder linkage and steam baffle intensification's tubular reactor, including cylinder, cylinder is provided with three groups side by side;Each cylinder is equipped with the vertical connection pipe of vertical setting, the vertical connection pipe in left side cylinder is connected with feed pipe by flange, the vertical connection pipe in right side cylinder is connected with discharge pipe by flange;Grease import G and methanol alkali import H are sequentially opened on feed pipe;Adjacent vertical connection pipe is communicated by outer connecting pipe;Steam import C is opened in cylinder below upper oval head, steam surrounds vertical connection pipe arrangement.The utility model is in series by three cylinders, convenient for later expansion or local repair;Steam input passage is arranged on the outer wall of pipeline in cylinder circumferentially, and combined with staggered distribution of baffle, enhance gas-liquid mixing efficiency and heat transfer uniformity;Corrugated pipe expansion joint is arranged in the middle section of each cylinder, reduce the risk of weld cracking, improve equipment pressure resistance and operating stability.

Description

Technical Field

[0001] This utility model relates to the field of chemical equipment, and in particular to the field of liquid-liquid mixing reaction technology, specifically a tubular reactor based on multi-cylinder linkage and steam baffle enhancement. Background Technology

[0002] Tubular reactors, as important chemical equipment, are widely used in gas-liquid and liquid-liquid multiphase reaction processes in industries such as chemical, petrochemical, and pharmaceutical. Traditional tubular reactors mostly adopt a single-cylinder structure, with internal pipes typically arranged in straight lines or simple spirals, and temperature control is achieved through external heating or cooling media.

[0003] However, the piping layout within a single cylinder makes it difficult to achieve uniform mixing and efficient heat transfer of reactants, especially for liquids with high viscosity or gas-liquid multiphase systems, which can easily lead to uneven local temperatures or incomplete reactions. In addition, under long-term high-temperature and high-pressure conditions, the cylinder and piping are prone to deformation or weld cracking due to thermal stress. Conventional single-cylinder designs lack thermal expansion compensation mechanisms, which affects the lifespan of the equipment. Summary of the Invention

[0004] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide a tubular reactor based on multi-cylinder linkage and steam baffle enhancement to solve the difficulties of the prior art.

[0005] To achieve the above and other related objectives, this utility model provides a tubular reactor based on multi-cylinder linkage and steam baffle enhancement, comprising:

[0006] The cylindrical body, wherein three sets of the cylindrical body are arranged side by side;

[0007] Vertical pipe 7, each of the cylinders is equipped with a vertically arranged vertical pipe 7, the vertical pipe 7 located in the left cylinder is connected to the feed pipe 1 by a flange, and the vertical pipe 7 located in the right cylinder is connected to the discharge pipe 22 by a flange.

[0008] Oil inlet G and methanol-alkali inlet H are sequentially opened on feed pipe 1;

[0009] External connecting pipe 21 connects adjacent vertical connecting pipes 7 located in different cylinders.

[0010] Steam inlet C is located below the upper elliptical head 16 of the cylinder, and a corresponding outlet D is located below the cylinder. Steam is arranged around the vertical pipe 7.

[0011] According to the preferred embodiment, the outer side of the cylinder is also equipped with a lifting lug 15 and a lug seat 9.

[0012] According to the preferred scheme, temperature measuring ports 2 are provided on both the feed pipe 1 and the discharge pipe 22 of the cylinder.

[0013] According to the preferred embodiment, the cylinder includes an upper elliptical end cap 16, an upper cylinder 14, a lower cylinder 8, and a lower elliptical end cap 3. An expansion joint 13 is also provided between the upper cylinder 14 and the lower cylinder 8. The outer diameter of the expansion joint 13 is larger than that of the cylinders of the upper cylinder 14 and the lower cylinder 8.

[0014] According to the preferred embodiment, support rings 10 and vertical pipes 7 are respectively installed inside the upper cylinder 14 and the lower cylinder 8.

[0015] According to the preferred embodiment, an annular baffle 12 is also installed at one end of the lower cylinder 8 near the expansion joint 13, and a baffle 11 with a diameter smaller than the annular baffle 12 is also installed below the annular baffle 12.

[0016] According to the preferred embodiment, two sets of vertical pipes 7 pass through the baffle 11.

[0017] According to a preferred embodiment, a plurality of vertical pipes 7 are provided in the same cylinder, and adjacent vertical pipes 7 are connected by an inner connecting pipe 19 located on the outside of the cylinder.

[0018] An exhaust port F is provided on the inner connecting pipe 19 located at the top of the cylinder;

[0019] A drain port E is provided on the inner connecting pipe 19 located at the bottom of the cylinder.

[0020] According to the preferred embodiment, multiple vertical pipes 7 and inner connecting pipes 19 located in the same cylindrical body are connected to form an S-shaped structure.

[0021] According to the preferred embodiment, both ends of the vertical pipe 7 located on both sides of the same cylindrical body are welded to the upper elliptical head 16 and the lower elliptical head 3 by outer diameter stiffener 17 and inner stiffener 18.

[0022] According to the preferred embodiment, the feed pipe 1 is located at the bottom of the cylinder, and the discharge pipe 22 is located at the top of the cylinder.

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

[0024] 1. Three independent cylinders are arranged in series or parallel, and the internal pipes of each cylinder are connected end to end to form a continuous flow channel, so as to realize the stage control of the reaction process and facilitate the later expansion or local maintenance.

[0025] 2. A steam input channel is set around the outer wall of the pipe inside the cylinder, and combined with the staggered distribution of baffles, the dynamic impact of steam and the guiding effect of baffles are used to enhance the gas-liquid mixing efficiency and heat transfer uniformity.

[0026] 3. Corrugated expansion joints are installed in the middle section of each cylinder to absorb the thermal deformation stress of the pipeline and cylinder through flexible connection, reduce the risk of weld cracking, and improve the pressure resistance and operational stability of the equipment.

[0027] This invention, through the integration of the above technologies, solves the problems of low mass and heat transfer efficiency, thermal stress concentration and high maintenance costs of existing tubular reactors. It is suitable for complex working conditions such as high-viscosity fluid catalytic reactions and gas-liquid multiphase continuous synthesis, and can significantly improve reaction efficiency and equipment service life.

[0028] The preferred embodiments of the present invention will be described in more detail below with reference to the accompanying drawings, so as to facilitate an understanding of the features and advantages of the present invention. Attached Figure Description

[0029] Figure 1 The diagram shown is a structural schematic of this utility model.

[0030] Figure 2 This is a top view of the present invention;

[0031] Label Explanation

[0032] 1. Feed pipe; 2. Temperature measuring port; 3. Lower elliptical head; 7. Vertical pipe; 8. Lower cylinder; 9. Lug; 10. Support ring; 11. Baffle plate; 12. Annular baffle plate; 13. Expansion joint; 14. Upper cylinder; 15. Lifting lug; 16. Upper elliptical head; 17. Outer diameter stiffener; 18. Inner stiffener; 19. Inner connecting pipe; 21. Outer connecting pipe; 22. Discharge pipe;

[0033] C. Steam inlet; D. Water outlet; E. Drain outlet; F. Exhaust outlet; G. Grease inlet; H. Methanol / alkali inlet. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. The same reference numerals in the drawings represent the same components. It should be noted that the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0035] Compared to the embodiments shown in the accompanying drawings, feasible embodiments within the scope of protection of this utility model may have fewer components, have other components not shown in the drawings, different components, components arranged differently, or components with different connections, etc. Furthermore, two or more components in the drawings may be implemented in a single component, or a single component described in the drawings may be implemented as multiple separate components.

[0036] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms “first,” “second,” and similar terms used in this patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, “an” or “a” and similar terms do not necessarily indicate a quantity limitation. Terms such as “comprising” or “including” mean that the element or object preceding the word encompasses the element or object listed following the word and its equivalents, without excluding other elements or objects. Terms such as “connected” or “linked” are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as “upper,” “lower,” “left,” and “right” are used only to indicate relative positional relationships; these relative positional relationships may change accordingly when the absolute position of the described object changes.

[0037] This invention proposes a tubular reactor based on multi-cylinder linkage and steam baffle enhancement for use in reactor design processes. This invention does not limit the type of reactor, but the structure of this tubular reactor based on multi-cylinder linkage and steam baffle enhancement is particularly suitable for liquid-liquid high-temperature mixing requirements.

[0038] In general, the tubular reactor based on multi-cylinder linkage and steam baffle enhancement proposed in this utility model mainly includes a cylinder, a vertical pipe 7, an oil inlet G and a methanol / alkali inlet H, an external connecting pipe 21, and a steam inlet C. See also... Figure 1 It shows the arrangement of the cylinder, vertical pipe 7, grease inlet G and methanol-alkali inlet H, external connecting pipe 21 and steam inlet C.

[0039] To improve the lifespan and mixing efficiency of tubular reactors and address the shortcomings of existing technologies where single-cylinder pipe layouts struggle to achieve uniform mixing and efficient heat transfer of reactants, especially in high-viscosity liquids or gas-liquid multiphase systems, leading to uneven local temperatures or incomplete reactions; furthermore, under long-term high-temperature and high-pressure conditions, the cylinder and pipes are prone to deformation or weld cracking due to thermal stress, and conventional single-cylinder designs lack thermal expansion compensation mechanisms, affecting equipment lifespan, this embodiment provides a solution where the tubular reactor employs a three-unit parallel cylinder series linkage design. Each cylinder is equipped with a vertical pipe 7, and material flow between adjacent cylinders is achieved through an external connecting pipe 21. The left cylinder... The feed pipe 1 connects to the grease inlet G and the methanol-alkali inlet H, and the discharge pipe 22 connects to the right side of the cylinder. The steam inlet C is located at the top of the cylinder, and the bottom has a condensate outlet D. The steam surrounds the vertical pipe 7 to form a baffle path. The internal pipes of each cylinder are connected end to end to form a continuous flow channel, realizing the staged control of the reaction process and facilitating later expansion or local maintenance. Steam input channels are set around the outer wall of the pipes inside the cylinder, and combined with the staggered distribution of baffles, the dynamic impact of steam and the baffle guiding effect enhance the gas-liquid mixing efficiency and heat transfer uniformity. Corrugated expansion joints are set in the middle section of each cylinder, which absorb the thermal deformation stress of the pipes and cylinder through flexible connection, reduce the risk of weld cracking, and improve the pressure resistance and operational stability of the equipment.

[0040] Specifically, each cylinder is equipped with a vertically arranged vertical pipe 7, and multiple vertical pipes 7 are arranged in the same cylinder. Adjacent vertical pipes 7 are connected by an inner connecting pipe 19 located on the outside of the cylinder. An exhaust port F is opened on the inner connecting pipe 19 located at the top of the cylinder. An empty port E is opened on the inner connecting pipe 19 located at the bottom of the cylinder. Multiple vertical pipes 7 and inner connecting pipes 19 in the same cylinder are connected to form an S-shaped structure. Through the above structure, multiple vertical pipes 7 form a continuous S-shaped flow path through the inner connecting pipe 19, which prolongs the material residence time and enhances the turbulence effect by switching the flow direction, thereby improving the mass transfer efficiency. In addition, the top exhaust port F can discharge the gas generated by the reaction in real time, avoiding gas resistance problems and ensuring flow rate stability. The corresponding empty port E can completely drain the residual liquid after the reaction, reducing cross-contamination, and is suitable for multi-batch continuous production.

[0041] Each cylinder includes an upper elliptical head 16, an upper cylinder 14, a lower cylinder 8, and a lower elliptical head 3. Lifting lugs 15 and lug seats 9 are also installed on the outer side of the cylinder. An expansion joint 13 is provided between the upper cylinder 14 and the lower cylinder 8. The outer diameter of the expansion joint 13 is larger than that of the upper cylinder 14 and the lower cylinder 8. This flexible connection absorbs the thermal deformation stress of the pipes and cylinders, reducing the risk of weld cracking and improving the pressure resistance and operational stability of the equipment. Corresponding to the above description, each cylinder is equipped with multiple vertical pipes 7. To ensure the stability of the multiple vertical pipes 7 during the material mixing process, support rings 10 are installed inside the upper cylinder 14 and the lower cylinder 8 to install the vertical pipes 7.

[0042] An annular baffle 12 is installed at one end of the lower cylinder 8 near the expansion joint 13. Below the annular baffle 12, a baffle 11 with a smaller diameter than the annular baffle 12 is installed. Two sets of vertical pipes 7 pass through the baffle 11, forming a two-stage baffle structure. This protects the expansion joint from direct scouring by high-temperature gas and also blocks the flow path of steam or reaction medium through the two-stage baffles, extending the heat exchange time. In addition, the wide design of the annular baffle 12 intercepts large particulate impurities, and the small-diameter baffle 11 further refines the filtration, reducing the risk of solid particles accumulating near the expansion joint 13.

[0043] like Figure 1 As shown, three sets of vertical pipes 7 are arranged side by side in the cylinder. The adjacent vertical pipes 7 in different cylinders are connected by external connecting pipes 21. The vertical pipe 7 in the left cylinder is connected to the feed pipe 1 by a flange, and the vertical pipe 7 in the right cylinder is connected to the discharge pipe 22 by a flange. The feed pipe 1 is located at the bottom of the cylinder, and the discharge pipe 22 is located at the top of the cylinder. Temperature measuring ports 2 are provided on both the feed pipe 1 and the discharge pipe 22. The grease inlet G and the methanol-alkali inlet H are sequentially opened on the feed pipe 1. The material flows from the left cylinder to the right cylinder step by step through the external connecting pipes 21, forming three continuous reaction zones, and the residence time is extended by 30%-50%. The feed pipe 1 is located at the bottom of the cylinder, and the discharge pipe 22 is located at the top. Combined with the vertical flow of the vertical pipes 7, gravity-assisted counter-mixing is formed, which facilitates the mixing of grease and methanol-alkali.

[0044] Based on this, preferably, both ends of the vertical pipe 7 located on both sides of the same cylinder are welded to the upper elliptical head 16 and the lower elliptical head 3 by outer diameter stiffening plates 17 and inner stiffening plates 18. The welding of outer diameter stiffening plates 17 and inner stiffening plates 18 evenly transfers the load of the vertical pipe 7 to the curved surface of the elliptical head, avoids local stress concentration, reduces the risk of fatigue cracks, and improves the overall bending stiffness of the elliptical head.

[0045] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A tubular reactor based on multi-cylinder linkage and steam baffle enhancement, characterized in that, include: The cylindrical body, wherein three sets of the cylindrical body are arranged side by side; Vertical pipe (7), each of the cylinders is equipped with a vertically arranged vertical pipe (7), the vertical pipe (7) located in the left cylinder is connected to the feed pipe (1) by a flange, and the vertical pipe (7) located in the right cylinder is connected to the discharge pipe (22) by a flange. Oil inlet G and methanol-alkali inlet H are sequentially opened on the feed pipe (1); External connecting pipe (21) connects adjacent vertical connecting pipes (7) located in different cylinders. Steam inlet C is located below the upper elliptical head (16) of the cylinder, and a water outlet D is correspondingly located below the cylinder. Steam is arranged around the vertical pipe (7).

2. The tubular reactor based on multi-cylinder linkage and steam baffle enhancement according to claim 1, characterized in that, The cylinder includes an upper elliptical end cap (16), an upper cylinder (14), a lower cylinder (8), and a lower elliptical end cap (3). An expansion joint (13) is also provided between the upper cylinder (14) and the lower cylinder (8). The outer diameter of the expansion joint (13) is larger than that of the upper cylinder (14) and the lower cylinder (8).

3. The tubular reactor based on multi-cylinder linkage and steam baffle enhancement according to claim 2, characterized in that, Support rings (10) and vertical pipes (7) are installed in the upper cylinder (14) and lower cylinder (8), respectively.

4. The tubular reactor based on multi-cylinder linkage and steam baffle enhancement according to claim 3, characterized in that, An annular baffle plate (12) is installed at one end of the lower cylinder (8) near the expansion joint (13), and a baffle plate (11) with a diameter smaller than the annular baffle plate (12) is installed below the annular baffle plate (12).

5. The tubular reactor based on multi-cylinder linkage and steam baffle enhancement according to claim 4, characterized in that, Multiple vertical pipes (7) are provided in the same cylinder, and adjacent vertical pipes (7) are connected by an inner connecting pipe (19) located on the outside of the cylinder; An exhaust port F is provided on the inner connecting pipe (19) located at the top of the cylinder; A drain port E is provided on the inner connecting pipe (19) located at the bottom of the cylinder.

6. The tubular reactor based on multi-cylinder linkage and steam baffle enhancement according to claim 5, characterized in that, The upper and lower ends of the vertical pipes (7) located on both sides of the same cylindrical body are welded to the upper elliptical head (16) and the lower elliptical head (3) by outer diameter stiffeners (17) and inner stiffeners (18).

7. The tubular reactor based on multi-cylinder linkage and steam baffle enhancement according to claim 6, characterized in that, The feed pipe (1) is located at the bottom of the cylinder, and the discharge pipe (22) is located at the top of the cylinder.

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