Dynamic tubular reaction system

Abstract

The invention discloses a dynamic tubular reaction system, and belongs to the technical field of reactors, the dynamic tubular reaction system comprises a plurality of tubular reactors which are connected end to end and are annularly arranged, and the tubular reactors are transversely arranged; and a gas outlet pipe with an upward opening is arranged at the connection position of the adjacent tubular reactors. According to the invention, the plurality of tubular reactors are annularly arranged end to end and are transversely arranged, the gas outlet pipes with upward openings can be arranged at the connection positions of the adjacent tubular reactors, and the arrangement of the plurality of gas outlet pipes increases the area of a gas-liquid interface, so that gas generated by reaction is conveniently discharged, and the influence of the gas on material flow is reduced; the continuous reaction is ensured, and the stable reaction is realized; meanwhile, a plurality of tubular reactors are connected end to end and are annularly arranged, so that the reaction path is increased through material circulation, and the product yield is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of reactors, and in particular relates to a dynamic tubular reaction system. Background Art

[0002] Tubular reactors are common industrial equipment, usually used for chemical reactions, catalytic reactions and heat exchange. In chemical production, when a tubular reactor is used for dynamic tubular reactions, a large amount of gas will be generated, which will hinder the flow of materials and thus affect the continuous progress of the reaction.

[0003] Based on the above problems, the present application proposes a dynamic tubular reaction system, in which an upward-opening gas outlet pipe is arranged at the position where adjacent tubular reactors are connected to facilitate the discharge of the gas generated by the reaction, reduce the impact of the gas on the material flow, and ensure the continuous progress of the reaction. Summary of the invention

[0004] The purpose of the present invention is to overcome the above-mentioned deficiencies of the prior art and provide a dynamic tubular reaction system.

[0005] To achieve the above purpose, the present invention adopts the following technical solution.

[0006] A dynamic tubular reaction system comprises a plurality of tubular reactors connected end to end in a ring arrangement, wherein the tubular reactors are placed transversely;

[0007] An upward-opening gas outlet pipe is provided at the position where adjacent tubular reactors are connected;

[0008] The tubular reactor comprises a shell, two parallel tube sheets are fixedly arranged in the shell, a plurality of reaction tubes are fixedly arranged between the two tube sheets, and tube holes connected to the reaction tubes are arranged on the tube sheets;

[0009] The shell comprises an intermediate cylinder and a first shell and a second shell connected to the axial ends of the intermediate cylinder, and two tube sheets are fixedly arranged at the inner ends of the intermediate cylinder;

[0010] The first shell of the tubular reactor is connected to the second shell of an adjacent tubular reactor;

[0011] A stirring assembly is disposed in the first shell, the stirring assembly comprising a stirring shaft, one end of the stirring shaft is connected to a paddle, and the other end of the stirring shaft passes through the first shell and is connected to a driving member;

[0012] In the tubular reactor, the gas outlet pipe and the paddles are distributed in sequence along the material flow direction.

[0013] Preferably, the cross section of the gas outlet pipe perpendicular to the gas flow direction is the first cross section, and the cross section of the first shell corresponding to the gas outlet pipe perpendicular to the material flow direction is the second cross section;

[0014] The area of ​​the first cross section is 0.5 to 1.2 times the area of ​​the second cross section.

[0015] Preferably, in the tubular reactor, a flow guide component for guiding the material to move toward the middle cylinder is provided on the inner wall of the first shell between the blades and the middle cylinder, and the flow guide component includes a plurality of flow guide plates arranged along the circumferential direction.

[0016] Preferably, a feed pipe is arranged on the first shell of at least one tubular reactor, and a discharge pipe is arranged on the second shell of at least one tubular reactor.

[0017] Preferably, a feed pipe is arranged on the first shell of each tubular reactor, and a discharge pipe is arranged on the second shell of each tubular reactor.

[0018] Preferably, a heat exchange medium inlet pipe and a heat exchange medium outlet pipe are respectively provided at both ends of the intermediate cylinder.

[0019] Preferably, the air outlet pipe is arranged on the first shell;

[0020] When a feed pipe is arranged on the first shell of the tubular reactor, the feed pipe and the gas outlet pipe are sequentially distributed along the material flow direction.

[0021] Preferably, the first shell of the tubular reactor is flange-connected or welded to the second shell of the adjacent tubular reactor.

[0022] Preferably, along the direction of material flow, the intermediate cylinder is in an upwardly inclined structure;

[0023] The center point where the first shell and the middle cylinder in the tubular reactor are connected is the first center point, and the center point where the second shell and the middle cylinder in the tubular reactor are connected is the second center point;

[0024] The first center points of all the tubular reactors are located on a first horizontal plane, and the second center points of all the tubular reactors are located on a second horizontal plane.

[0025] Preferably, along the direction of material flow, the angle between the central axis of the intermediate cylinder and the horizontal plane is 5° to 20°.

[0026] The beneficial effects of the present invention are:

[0027] (1) In the present invention, multiple tubular reactors are connected end to end in a ring-shaped arrangement, and the tubular reactors are placed horizontally. An air outlet pipe with an upward opening can be provided at the connection position of adjacent tubular reactors. The provision of multiple air outlet pipes increases the area of ​​the gas-liquid interface, so as to facilitate the discharge of the gas generated by the reaction and reduce the influence of the gas on the flow of materials, so as to ensure the continuous progress of the reaction and achieve a stable reaction. At the same time, multiple tubular reactors are connected end to end in a ring-shaped arrangement, and through material circulation, the reaction path is increased and the product yield is improved.

[0028] (2) In the dynamic tubular reaction system of the present invention, the reaction materials are exhausted through the gas outlet pipe in the first shell and then fully mixed by stirring with blades, and then enter the reaction tube for full reaction, and then enter the first shell of the next tubular reactor through the second shell, and are exhausted, stirred, and reacted again in sequence. Through the annular structure setting, a small number of tubular reactors are used to realize multiple cycles of material exhaust, stirring, and reaction, thereby saving the number of tubular reactors and improving the product yield.

[0029] (3) In the present invention, a feed pipe is provided on the first shell of at least one tubular reactor, and a discharge pipe is provided on the second shell of at least one tubular reactor. The two ends of the intermediate cylinder are respectively connected to a heat exchange medium inlet pipe and a heat exchange medium outlet pipe. The heat exchange medium flows through the shell side to exchange heat with the reaction materials in the reaction tube. The reaction materials can be added in stages to the corresponding tubular reactor according to the specific reaction type and requirements. Furthermore, heat exchange media of different temperatures can be introduced into different tubular reactors to achieve staged temperature control of the reaction process and improve the product yield.

[0030] (4) In the dynamic tubular reaction system of the present invention, the structural arrangement of the tubular reactor, the position arrangement of the gas outlet pipe, and the relative position arrangement of the blades and the gas outlet pipe enable the material to undergo sufficient heat exchange and reaction in the reaction tube, and to undergo sufficient exhaust and stirring in the first shell.

[0031] (5) In the present invention, after the reaction materials flow through a tubular reactor, the gas and liquid are separated or partially separated and then discharged from the gas outlet pipe, thereby preventing the separated gas from entering a mixed state again under the stirring of the blades, which is conducive to the efficient discharge of the gas and improves the reaction efficiency and product yield.

[0032] (6) In the present invention, the gas outlet pipe and the paddles are distributed in sequence along the material flow direction, so that the gas is discharged first and then stirred and mixed, avoiding the separated gas from entering the mixed state again under the stirring of the paddles, which is conducive to the efficient discharge of the gas and improves the reaction efficiency and product yield.

[0033] (7) In the present invention, when a feed pipe is provided on the first shell of the tubular reactor, the feed pipe and the gas outlet pipe are sequentially distributed along the material flow direction, so that the gas carried by the incoming material is first initially discharged through the gas outlet pipe, thereby reducing the gas content of the material during its forward movement.

[0034] (8) In the present invention, along the direction of material flow, the middle cylinder is in an upwardly inclined structure to avoid gas trapping. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The drawings in the specification, which constitute a part of the present application, are used to provide further understanding of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute improper limitations on the present application.

[0036] Figure 1 It is a structural schematic diagram of the dynamic tubular reaction system of the present invention;

[0037] Figure 2 It is a schematic structural diagram of a tubular reactor in the present invention;

[0038] Figure 3 It is a structural schematic diagram of the flow guide assembly in the present invention;

[0039] Figure 4 It is a schematic diagram of an adjacent tubular reactor in the dynamic tubular reaction system of the present invention after being disconnected and unfolded;

[0040] in:

[0041] 1-air outlet pipe, 2-tube sheet, 3-reaction tube, 4-intermediate cylinder, 5-first shell, 6-second shell, 7-agitation shaft, 8-blade, 9-guide plate, 10-feed pipe, 11-discharge pipe, 12-heat exchange medium inlet pipe, 13-heat exchange medium outlet pipe, 14-first center point, 15-second center point, 16-first horizontal plane, 17-second horizontal plane, 18-first cross section, 19-second cross section. DETAILED DESCRIPTION

[0042] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0043] Embodiment 1:

[0044] like Figure 1 As shown, a dynamic tubular reaction system comprises a plurality of tubular reactors connected end to end in a ring arrangement, wherein the tubular reactors are placed transversely;

[0045] An air outlet pipe 1 with an upward opening is arranged at the position where adjacent tubular reactors are connected.

[0046] In the present application, multiple tubular reactors are connected end to end in a ring-shaped arrangement, and the tubular reactors are placed horizontally. An outlet pipe 1 with an upward opening is provided at the connection position of adjacent tubular reactors. The provision of multiple outlet pipes 1 increases the area of ​​the gas-liquid interface to facilitate the discharge of the gas generated by the reaction and reduce the impact of the gas on the flow of materials, so as to ensure the continuous progress of the reaction and achieve a stable reaction. At the same time, multiple tubular reactors are connected end to end in a ring-shaped arrangement, and through material circulation, the reaction path is increased and the product yield is improved.

[0047] like Figure 2 As shown, the tubular reactor includes a shell, two parallel tube sheets 2 are fixedly arranged in the shell, a plurality of reaction tubes 3 are fixedly arranged between the two tube sheets 2, and tube holes connected to the reaction tubes 3 are arranged on the tube sheets 2; the reaction tubes 3 are in the tube side, and the space between the reaction tubes 3, the tube sheets 2, and the inner wall of the shell is the shell side. Both ends of the reaction tubes 3 are located in the tube holes and connected to the tube sheets 2. The specific connection method can be welding, or a sealing ring is arranged between the reaction tubes 3 and the tube sheets 2, etc., to ensure that the reaction materials will not enter the shell side through the gap between the reaction tubes 3 and the tube holes.

[0048] The shell includes an intermediate cylinder 4 and a first shell 5 and a second shell 6 connected to the axial ends of the intermediate cylinder 4. Two tube sheets 2 are fixedly arranged at the inner ends of the intermediate cylinder 4.

[0049] The first shell 5 of the tubular reactor is connected to the second shell 6 of the adjacent tubular reactor.

[0050] A stirring assembly is arranged in the first shell 5, and the stirring assembly includes a stirring shaft 7, one end of the stirring shaft 7 is connected to a paddle 8, and the other end of the stirring shaft 7 is connected to a driving member after passing through the first shell 5. The driving member can be a motor, and the driving member drives the paddle 8 to rotate through the stirring shaft 7, pushes the material forward, and mixes the material in the inner cavity of the first shell 5.

[0051] In the tubular reactor, the gas outlet pipe 1 and the paddle blades 8 are sequentially distributed along the material flow direction. The gas outlet pipe 1 and the paddle blades 8 are sequentially distributed along the material flow direction, so that the gas is discharged first and then stirred and mixed, and the gas separated in the previous tubular reactor is prevented from entering the mixed state again under the stirring of the paddle blades 8, which is conducive to the efficient discharge of the gas, and improves the reaction efficiency and product yield.

[0052] In the above-mentioned dynamic tubular reaction system, the reaction materials exhaust gas through the outlet pipe 1 in the first shell 5, are fully mixed by stirring by the blades 8, and then enter the reaction tube 3 for sufficient reaction, and then enter the first shell 5 of the next tubular reactor through the second shell 6, and are exhausted, stirred, and reacted again in sequence. Through the annular structure setting, a small number of tubular reactors are used to realize multiple cycles of material exhaust, stirring, and reaction, thereby saving the number of tubular reactors and improving the product yield.

[0053] Preferably, the cross section of the outlet pipe 1 perpendicular to the gas flow direction is a first cross section 18, and the cross section of the first shell 5 corresponding to the outlet pipe 1 perpendicular to the material flow direction is a second cross section 19;

[0054] The area of ​​the first cross section 18 is 0.5 to 1.2 times the area of ​​the second cross section 19. After reacting in the reaction tube 3, the reaction materials enter the larger space in the first shell 5 for exhaust, and the size of the outlet pipe 1 is set to ensure smooth exhaust of the gas.

[0055] Preferably, in the tubular reactor, a flow guide component for guiding the material to move toward the middle cylinder 4 is provided on the inner wall of the first shell 5 between the blades 8 and the middle cylinder 4, such as Figure 3 As shown, the guide assembly includes a plurality of guide plates 9 arranged along the circumferential direction. The guide plates 9 are used to guide the material to prevent the material from rotating and flowing in the circumferential direction under the rotation and stirring of the blades 8.

[0056] Preferably, a feed pipe 10 is disposed on the first shell 5 of at least one tubular reactor, and a discharge pipe 11 is disposed on the second shell 6 of at least one tubular reactor.

[0057] The following description takes the case where a reaction system is provided with four tubular reactors, namely a first tubular reactor, a second tubular reactor, a third tubular reactor and a fourth tubular reactor.

[0058] A feed pipe 10 can be set on the first shell 5 of the first tubular reactor, and a discharge pipe 11 can be set on the second shell 6 of the fourth tubular reactor. The mixed reaction materials enter the reaction system through the feed pipe 10, flow through the first tubular reactor, the second tubular reactor, the third tubular reactor, and the fourth tubular reactor for sufficient reaction, and are discharged from the discharge pipe 11.

[0059] A feed pipe 10 may also be provided on the first shell 5 of the first tubular reactor and the second tubular reactor, and a discharge pipe 11 may be provided on the second shell 6 of the fourth tubular reactor. The reaction material enters the reaction system through the feed pipe 10 of the first tubular reactor, is fed (another material is added) when flowing through the second tubular reactor, and then flows through the third tubular reactor and the fourth tubular reactor to be discharged from the discharge pipe 11 after sufficient reaction.

[0060] Alternatively, a feed pipe 10 may be provided on the first shell 5 of each tubular reactor, and a discharge pipe 11 may be provided on the second shell 6 of each tubular reactor, and the corresponding feed pipe 10 and discharge pipe 11 may be opened according to specific reaction requirements.

[0061] Preferably, a heat exchange medium inlet pipe 12 and a heat exchange medium outlet pipe 13 are respectively provided at both ends of the intermediate cylinder 4 .

[0062] The heat exchange medium flows through the shell side to exchange heat for the reaction materials in the reaction tube 3. Different tubular reactors can be fed with heat exchange media of different temperatures to achieve staged temperature control of the reaction process and improve product yield.

[0063] In the above-mentioned dynamic tubular reaction system, the structural setting of the tubular reactor, the position setting of the outlet pipe 1, and the relative position setting of the blades 8 and the outlet pipe 1 enable the material to undergo sufficient heat exchange and reaction in the reaction tube 3, and to undergo sufficient exhaust and stirring in the first shell 5.

[0064] Preferably, the air outlet pipe 1 is arranged on the first shell 5;

[0065] When a feed pipe 10 is disposed on the first shell 5 of the tubular reactor, the feed pipe 10 and the gas outlet pipe 1 are sequentially distributed along the material flow direction.

[0066] After the reaction materials flow through a tubular reactor, the gas and liquid are separated or partially separated and discharged from the outlet pipe 1, avoiding the separated gas from re-entering the mixed state under the stirring of the blade 8, which is conducive to the efficient discharge of the gas and improves the reaction efficiency and product yield.

[0067] When a feed pipe 10 is provided on the first shell 5 of the tubular reactor, the feed pipe 10 and the gas outlet pipe 1 are sequentially distributed along the material flow direction, so that the gas carried in the initial material is initially discharged through the gas outlet pipe 1, thereby reducing the gas content of the material during its forward movement.

[0068] Preferably, the first shell 5 of the tubular reactor is connected to the second shell 6 of the adjacent tubular reactor by flange connection or welding.

[0069] When flange connection is performed, a first flange is provided at one end of the first shell 5 away from the intermediate cylinder 4, and a second flange is provided at one end of the second shell 6 away from the intermediate cylinder 4. The second flange of each tubular reactor is connected to the first flange of the adjacent tubular reactor, so that the second shell 6 of each tubular reactor is connected to the inner cavity of the first shell 5 of the adjacent tubular reactor.

[0070] Embodiment 2:

[0071] On the basis of Example 1, along the direction of material flow, the intermediate cylinder 4 is inclined upward to avoid gas trapping; wherein the angle between the central axis of the intermediate cylinder 4 and the horizontal plane is 5° to 20°;

[0072] The center point where the first shell 5 and the intermediate cylinder 4 in the tubular reactor are connected is the first center point 14, and the center point where the second shell 6 and the intermediate cylinder 4 in the tubular reactor are connected is the second center point 15;

[0073] The first center points 14 of all the tubular reactors are located on a first horizontal plane 16 , and the second center points 15 of all the tubular reactors are located on a second horizontal plane 17 , wherein the second horizontal plane 17 is higher than the first horizontal plane 16 .

[0074] The schematic diagram after disconnecting and unfolding an adjacent tubular reactor in the reaction system of the present application is as follows Figure 4 shown.

[0075] In the present invention, a feed pipe 10 is provided on at least one first shell 5 of a tubular reactor, a discharge pipe 11 is provided on at least one second shell 6 of a tubular reactor, and the two ends of the intermediate cylinder 4 are respectively connected to a heat exchange medium inlet pipe 12 and a heat exchange medium outlet pipe 13, and the heat exchange medium flows through the shell side to exchange heat for the reaction materials in the reaction tube 3; the reaction materials can be added in stages in the corresponding tubular reactor according to the specific reaction type and requirements, and further, heat exchange media of different temperatures can be introduced into different tubular reactors to achieve staged temperature control of the reaction process and improve the product yield. In the material circulation process, after the reaction materials flow through a tubular reactor, the gas and liquid are separated or partially separated and discharged from the gas outlet pipe 1, reducing the influence of the gas on the material flow, so as to ensure the continuous progress of the reaction, achieve a stable reaction, and improve the reaction efficiency and product yield.

[0076] According to the specific reaction type and requirements, the reaction tube 3 in the present invention can be an empty tube or a filled tube filled with a granular catalyst.

[0077] Parts not described in the present invention can be implemented by adopting or drawing on existing technologies.

[0078] Although the above describes the specific implementation mode of the present invention in conjunction with the accompanying drawings, it is not a limitation of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art on the basis of the technical solution of the present invention without creative work are still within the protection scope of the present invention.

Claims

1. A dynamic tubular reaction system, characterized in that: It comprises a plurality of tubular reactors connected end to end in a ring arrangement, wherein the tubular reactors are placed transversely; An air outlet pipe (1) with an upward opening is arranged at a position where adjacent tubular reactors are connected; The tubular reactor comprises an outer shell, two parallel tube sheets (2) are fixedly arranged in the outer shell, a plurality of reaction tubes (3) are fixedly arranged between the two tube sheets (2), and tube holes connected to the reaction tubes (3) are arranged on the tube sheets (2); The shell comprises an intermediate cylinder (4) and a first shell (5) and a second shell (6) connected to two axial ends of the intermediate cylinder (4); two tube sheets (2) are fixedly arranged at two ends of the inner side of the intermediate cylinder (4); The first shell (5) of the tubular reactor is connected to the second shell (6) of the adjacent tubular reactor; A stirring assembly is arranged in the first shell (5), the stirring assembly comprising a stirring shaft (7), one end of the stirring shaft (7) is connected to a paddle (8), and the other end of the stirring shaft (7) passes through the first shell (5) and is connected to a driving member; In the tubular reactor, the gas outlet pipe (1) and the paddle blades (8) are sequentially distributed along the material flow direction.

2. The dynamic tubular reaction system according to claim 1, characterized in that: A cross section of the gas outlet pipe (1) perpendicular to the gas flow direction is a first cross section (18), and a cross section of the first shell (5) corresponding to the gas outlet pipe (1) perpendicular to the material flow direction is a second cross section (19); The area of ​​the first cross section (18) is 0.5 to 1.2 times the area of ​​the second cross section (19).

3. The dynamic tubular reaction system according to claim 1, characterized in that: In the tubular reactor, a flow guide component for guiding the material to move toward the intermediate cylinder (4) is provided on the inner wall of the first shell (5) between the blades (8) and the intermediate cylinder (4), and the flow guide component includes a plurality of flow guide plates (9) arranged in a circumferential direction.

4. The dynamic tubular reaction system according to claim 1, characterized in that: A feed pipe (10) is arranged on the first shell (5) of at least one tubular reactor, and a discharge pipe (11) is arranged on the second shell (6) of at least one tubular reactor.

5. The dynamic tubular reaction system according to claim 4, characterized in that: A feed pipe (10) is arranged on the first shell (5) of each tubular reactor, and a discharge pipe (11) is arranged on the second shell (6) of each tubular reactor.

6. The dynamic tubular reaction system according to claim 1, characterized in that: A heat exchange medium inlet pipe (12) and a heat exchange medium outlet pipe (13) are respectively provided at both ends of the intermediate cylinder (4).

7. The dynamic tubular reaction system according to claim 4, characterized in that: The air outlet pipe (1) is arranged on the first shell (5); When a feed pipe (10) is provided on the first shell (5) of the tubular reactor, the feed pipe (10) and the gas outlet pipe (1) are sequentially distributed along the material flow direction.

8. The dynamic tubular reaction system according to claim 1, characterized in that: The first shell (5) of the tubular reactor is flange-connected or weld-connected to the second shell (6) of the adjacent tubular reactor.

9. The dynamic tubular reaction system according to claim 1, characterized in that: Along the direction of material flow, the intermediate cylinder (4) is in an upwardly inclined structure; The center point where the first shell (5) and the intermediate cylinder (4) in the tubular reactor are connected is the first center point (14), and the center point where the second shell (6) and the intermediate cylinder (4) in the tubular reactor are connected is the second center point (15); The first center points (14) of all the tubular reactors are located on a first horizontal plane (16), and the second center points (15) of all the tubular reactors are located on a second horizontal plane (17).

10. The dynamic tubular reaction system according to claim 9, characterized in that: Along the direction of material flow, the angle between the central axis of the intermediate cylinder (4) and the horizontal plane is 5° to 20°.

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