A continuous flow tubular reactor

Abstract

This invention relates to the field of tubular reactor technology, specifically to a continuous flow tubular reactor, comprising a shell, multiple baffles, and multiple media tubes. The baffles define a helical flow channel between themselves and the shell. Multiple first elastic tabs pass through the baffles, evenly distributed circumferentially along the media tubes, and are helical in shape. This continuous flow tubular reactor utilizes the rotation and axial movement of the baffles to alter the flow path of the reactants, continuously changing dead zone positions and preventing reactants from accumulating in one area, thus improving reaction efficiency. Furthermore, as the baffles rotate and move, the first elastic tabs generate axial turbulence on the reactants passing between the media tubes and baffles, increasing flow resistance, reducing the probability of incomplete reaction, and improving reaction stability.

Description

Technical Field

[0001] This invention relates to the field of tubular reactor technology, and more specifically to a continuous flow tubular reactor. Background Technology

[0002] Continuous flow reactors, as core equipment in chemical production to achieve continuous chemical reactions, improve production efficiency and product stability by enabling reactants and solvents to react simultaneously during the flow process. Compared to traditional batch reactors, tubular reactors have significant advantages such as high mixing efficiency, low liquid holdup, and good safety.

[0003] In existing technologies, baffles are commonly installed in the shell side of the reactor to force the fluid to laterally scour the heat exchange tube bundle, changing the flow path of the shell-side fluid and enhancing the reaction effect. For example, Chinese patent CN220214862U discloses a fixed-bed reactor for vinyl acetate production using the ethylene process. The reactor has multiple baffles that divide the reactor cavity into several sections, making the fluid distribution more uniform and thus increasing the heat exchange efficiency between the fluid and the reaction tubes. However, when the reactants move back and forth along the baffles, some materials form low-velocity or even stagnant areas (dead zones) at the baffle edges and in the gaps between the baffles and the shell. This leads to a significant decrease in reaction efficiency and over-reaction of some materials. Furthermore, materials can rapidly flow out through low-resistance gaps such as the gaps between the baffles and the shell, and between the heat exchange tubes and the baffles (leakage), shortening the reaction time and causing incomplete reaction of some materials, thus affecting the reaction efficiency and effect. Summary of the Invention

[0004] This invention provides a continuous flow tubular reactor to solve the problem that dead zones and leakage occur in the shell side of existing continuous flow tubular reactors during use, which affect reaction efficiency and reaction effect.

[0005] The present invention provides a continuous flow tubular reactor with the following technical solution: A continuous flow tubular reactor includes a shell, multiple baffles, and multiple media tubes; the shell is arranged horizontally, and the axial direction of the shell is referred to as the first direction; the shell has an inlet and an outlet; multiple baffles are arranged sequentially and uniformly along the first direction within the shell, and a spiral flow channel is defined between the multiple baffles and the shell; each of the multiple baffles can rotate around its own axis and can move in the first direction; multiple media tubes are arranged within the shell along the first direction and penetrate the shell along the first direction, and the media tubes pass through the baffles via multiple first elastic tabs, which are evenly distributed in the circumferential direction of the media tubes, and the first elastic tabs are spiral-shaped.

[0006] Furthermore, the shell is provided with a first chamber and a second chamber at its two ends in the first direction, respectively. The first chamber has a liquid inlet and the second chamber has a liquid outlet. The two ends of the medium tube are connected to the first chamber and the second chamber, respectively.

[0007] Furthermore, baffles are provided at both ends of the shell, and transmission components are provided on the baffles. The transmission components can drive the medium tube to revolve around the axis of the shell while simultaneously causing the medium tube to rotate around its own axis.

[0008] Furthermore, the transmission components include a main gear, a gear ring, a planetary carrier, a motor, and multiple driven gears; the gear ring is fixedly mounted on a baffle, the planetary carrier is rotatably mounted on the baffle, and the main gear is rotatably mounted on the planetary carrier via the motor; multiple driven gears are rotatably mounted on the planetary carrier, and the driven gears simultaneously mesh with the main gear and the gear ring; each driven gear is correspondingly arranged with a medium pipe, the medium pipe is fixedly connected to its corresponding driven gear, and passes through the driven gear along a first direction.

[0009] Furthermore, the rotation of the medium tube enables the baffle to move in the first direction.

[0010] Furthermore, the medium tube is a spiral tube, and the spiral axis of the medium tube is in the same direction as the spiral axis of the first spring.

[0011] Furthermore, each baffle plate is provided with a through hole for the medium tube to pass through, and the first spring is fixedly installed in the through hole.

[0012] Furthermore, each baffle plate has multiple second spring plates on its outer peripheral wall. The second spring plates are spiral-shaped, and the spiral axis of the second spring plates is in the same direction as that of the first spring plate.

[0013] Furthermore, all the baffles are bow-shaped plates, and each baffle has multiple through holes.

[0014] Furthermore, both the first and second chambers are equipped with support plates for supporting the motor, and the motor is covered with a sealing shell.

[0015] The beneficial effects of this invention are as follows: The continuous flow tubular reactor of this invention allows multiple baffles to rotate around their own axes and move in a first direction. By utilizing the rotation and axial movement of the baffles, the flow path of the reactants is altered, continuously changing dead zone positions and preventing reactants from accumulating in one area, thus improving reaction efficiency. Furthermore, as the baffles rotate and move, when the reactants pass between the medium tube and the baffles, the first spring plate generates axial turbulence, changing the flow trajectory of the reactants, reducing their velocity at that point, increasing flow resistance, increasing the reaction time of the reactants passing through this area, reducing the probability of incomplete reaction, and improving reaction stability. Moreover, the movement of the baffles in the first direction also scrapes the inner circumferential wall of the shell, reducing reactant accumulation. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of an embodiment of a continuous flow tubular reactor according to the present invention;

[0018] Figure 2 This is a side view of the overall structure of an embodiment of a continuous flow tubular reactor according to the present invention;

[0019] Figure 3 for Figure 2 A cross-sectional view along the AA direction;

[0020] Figure 4 for Figure 3 Enlarged view of point B in the middle;

[0021] Figure 5 for Figure 3 Enlarged view of point C in the middle;

[0022] Figure 6 This is a schematic diagram of the transmission component in the overall structure of an embodiment of a continuous flow tubular reactor according to the present invention;

[0023] Figure 7 This is a schematic diagram of the media tube in an embodiment of a continuous flow tubular reactor according to the present invention;

[0024] Figure 8 This is a schematic diagram of a baffle plate according to an embodiment of a continuous flow tubular reactor of the present invention;

[0025] Figure 9 for Figure 8 A cross-sectional view along the DD direction;

[0026] Figure 10 for Figure 9 Enlarged view at point E in the middle;

[0027] Figure 11 for Figure 9 Enlarged view of point F in the middle.

[0028] In the diagram: 100, shell; 101, inlet; 102, outlet; 110, first chamber; 111, liquid inlet; 120, second chamber; 121, liquid outlet; 130, baffle; 140, transmission component; 141, main gear; 142, gear ring; 143, planetary carrier; 144, driven gear; 145, motor; 200, baffle plate; 201, through hole; 202, through hole; 300, medium pipe; 400, first spring; 500, second spring. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] An embodiment of the continuous flow tubular reactor of the present invention, such as... Figures 1 to 11 As shown.

[0031] A continuous flow tubular reactor includes a shell 100, a plurality of baffles 200, and a plurality of media tubes 300. The shell 100 is arranged horizontally, and the axial direction of the shell 100 is referred to as the first direction. An inlet 101 and an outlet 102 are provided on the shell 100, located on opposite sides of the shell 100 in the first direction and both above the shell 100. Reactants can be fed into the shell 100 through the inlet 101 and discharged through the outlet 102. The plurality of baffles 200 are arranged sequentially and uniformly along the first direction within the shell 100, defining a helical flow channel between the baffles 200 and the shell 100. Each baffle 200 is rotatable about its own axis and can move in the first direction. Multiple medium tubes 300 are disposed inside the housing 100 along the first direction and penetrate the housing 100 along the first direction. The medium tubes 300 are inserted into the baffle plate 200 through multiple first spring pieces 400. The multiple first spring pieces 400 are evenly distributed in the circumferential direction of the medium tubes 300 and the first spring pieces 400 are spiral.

[0032] The multiple baffles 200 are all arc-shaped plates, and each baffle 200 has multiple through holes 201. The multiple baffles 200 are divided into multiple upper plates and multiple lower plates, which are arranged sequentially along a first direction within the housing 100, and the upper and lower plates are alternately distributed in the first direction. The upper plates are in contact with the inner top wall of the housing 100 and have a gap between them and the inner bottom wall of the housing 100. The lower plates have a gap between them and the inner top wall of the housing 100 and are in contact with the inner bottom wall of the housing 100. The spiral flow channel is defined by the housing 100, the multiple upper plates, and the multiple lower plates.

[0033] The housing 100 has a first chamber 110 and a second chamber 120 at its two ends in the first direction. The first chamber 110 has a liquid inlet 111 and the second chamber 120 has a liquid outlet 121. The two ends of the medium pipe 300 are connected to the first chamber 110 and the second chamber 120, respectively.

[0034] In operation, the reactants are fed into the shell 100 through inlet 101, and the heat exchange medium is fed into the medium pipe 300 through inlet 111. After entering the shell 100, the reactants flow along a spiral channel, scouring the medium pipe 300 and enhancing the reaction effect. Furthermore, after the reactants enter the shell 100, multiple baffles 200 are driven to rotate around their own axes while simultaneously moving in the first direction. The rotation and axial movement of the baffles 200 alter the flow path of the reactants, continuously changing dead zones and preventing reactants from accumulating in one area, thus improving reaction efficiency. Furthermore, as the baffle 200 rotates and moves, when the reactants pass between the medium pipe 300 and the baffle 200, the first spring plate 400 will generate axial turbulence on the reactants passing between the medium pipe 300 and the baffle 200, changing the flow trajectory of the reactants, increasing flow resistance, reducing the flow velocity of the reactants at this point, increasing the reaction time of the reactants passing through this point, reducing the probability of incomplete reaction, and improving the stability of the reaction. Moving the baffle 200 in the first direction also has a scraping effect on the inner peripheral wall of the shell 100, reducing the accumulation of reactants. Finally, the reactants after the reaction are discharged from the outlet 102, and the heat exchange medium is discharged from the liquid outlet 121.

[0035] In a further embodiment, baffles 130 are provided at both ends of the housing 100. A transmission member 140 is provided on the baffle 130, which can drive the medium tube 300 to revolve around the axis of the housing 100 while simultaneously causing the medium tube 300 to rotate around its own axis.

[0036] The transmission component 140 includes a main gear 141, a gear ring 142, a planetary carrier 143, a motor 145, and multiple driven gears 144. The gear ring 142 is fixedly mounted on a baffle 130, and the planetary carrier 143 is rotatably mounted on the baffle 130. A sealing ring is provided between the planetary carrier 143 and the gear ring 142. The main gear 141 is rotatably mounted on the planetary carrier 143 via the motor 145. Multiple driven gears 144 are rotatably mounted on the planetary carrier 143, and each driven gear 144 meshes with both the main gear 141 and the gear ring 142. Each driven gear 144 corresponds to a medium pipe 300, and the medium pipe 300 is fixedly connected to its corresponding driven gear 144 and passes through the driven gear 144 along a first direction.

[0037] Furthermore, both the first chamber 110 and the second chamber 120 are equipped with support plates for supporting the motor 145. The motor 145 is covered with a sealing shell. The motors 145 on the two transmission components 140 are synchronous motors and can rotate in both directions, so that the two main gears 141 can rotate synchronously and can change the direction of rotation.

[0038] In this embodiment, by setting up a transmission component 140, the motor 145 is started during use. The start of the motor 145 will drive the main gear 141 to rotate. The rotation of the main gear 141 will drive the driven gear 144 to rotate. Through the meshing of the driven gear 144 with the gear ring 142, multiple driven gears 144 will revolve around the first direction and rotate on their own axis at the same time. At this time, the planetary carrier 143 will be driven to rotate by multiple driven gears 144. The rotation of the driven gears 144 will drive the corresponding medium pipe 300 to revolve around the first direction and rotate on its own axis, and further drive multiple baffles 200 to rotate.

[0039] In a further embodiment, the rotation of the medium tube 300 enables the baffle 200 to move in a first direction.

[0040] The medium tube 300 is a spiral tube, and the spiral axis of the medium tube 300 is in the same direction as the spiral axis of the first spring 400.

[0041] Specifically, each baffle plate 200 is provided with a through hole 202 for the medium tube 300 to pass through, and the first spring plate 400 is fixedly installed in the through hole 202.

[0042] In this embodiment, the medium tube 300 is set as a spiral tube and the spiral axes of the two are aligned. In use, the rotation of the medium tube 300 causes the baffle plate 200 to move in the first direction.

[0043] In a further embodiment, a plurality of second spring plates 500 are provided on the outer peripheral wall of each baffle 200. The plurality of second spring plates 500 are evenly distributed on the outer peripheral wall of the baffle 200. The second spring plates 500 are spiral in shape, and the spiral axis direction of the second spring plate 500 is the same as the spiral axis direction of the first spring plate 400.

[0044] In this embodiment, by setting a second spring 500, when the baffle 200 rotates and moves along the first direction, the baffle 200 will drive the second spring 500 to move synchronously. The second spring 500 enhances the scraping effect on the inner wall of the housing 100, and can also generate axial turbulence on the reactants passing through this area, changing the flow trajectory of the reactants, reducing the flow velocity of the reactants at this point, increasing the reaction time of the reactants passing through this point, reducing the probability of incomplete reaction, and improving the stability of the reaction. Furthermore, the setting of the first spring 400 and the second spring 500 can also increase the strength between the baffle 200 and the medium pipe 300, weaken the vibration between the baffle 200 and the medium pipe 300, reduce the probability of damage to the medium pipe 300, and extend the service life of the medium pipe 300.

[0045] Based on the above embodiments, the specific working process is as follows:

[0046] During use, the reactants are fed into the shell 100 through the inlet 101, and the heat exchange medium is fed into the medium pipe 300 through the liquid inlet 111. After entering the shell 100, the reactants will flow along the spiral channel inside the shell 100, flushing the medium pipe 300 and enhancing the reaction effect.

[0047] After the reactants enter the housing 100, the motor 145 is started. The start of the motor 145 drives the main gear 141 to rotate, which in turn drives the driven gear 144 to rotate. Through the meshing of the driven gear 144 with the gear ring 142, multiple driven gears 144 revolve around a first direction while simultaneously rotating on their own axes. At this time, the planetary carrier 143 will be driven to rotate by the multiple driven gears 144. The rotation of the driven gears 144 will drive the corresponding medium pipe 300 to revolve around a first direction while simultaneously rotating on its own axis, further driving multiple baffles 200 to rotate. The rotation of the medium pipe 300 will also cause the baffles 200 to move in the first direction. By changing the flow path of the reactants through the rotation and axial movement of the baffles 200, the dead zone position is continuously changed, preventing the reactants from accumulating in one area and improving the reaction efficiency.

[0048] Furthermore, as the baffle 200 rotates and moves, when the reactants pass between the medium pipe 300 and the baffle 200, the first spring plate 400 will generate axial turbulence on the reactants passing between the medium pipe 300 and the baffle 200. When the reactants pass between the baffle 200 and the inner peripheral wall of the shell 100, the second spring plate 500 will generate axial turbulence on the reactants passing between the baffle 200 and the inner peripheral wall of the shell 100. By utilizing the cooperation of the first spring plate 400 and the second spring plate 500, the flow trajectory of the reactants is changed, the flow velocity of the reactants at that point is reduced, the reaction time of the reactants passing through this point is increased, the probability of incomplete reaction is reduced, and the stability of the reaction is improved. Moreover, moving the baffle 200 in the first direction can also scrape the inner peripheral wall of the shell 100, reducing the accumulation of reactants. The arrangement of the first spring plate 400 and the second spring plate 500 can also increase the strength between the baffle plate 200 and the medium tube 300, weaken the vibration between the baffle plate 200 and the medium tube 300, reduce the probability of damage to the medium tube 300, and extend the service life of the medium tube 300.

[0049] Finally, the reactants are discharged from outlet 102, and the heat exchange medium is discharged from outlet 121.

[0050] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A continuous flow tubular reactor, characterized in that: The device includes a shell, multiple baffles, and multiple medium tubes. The shell is arranged horizontally, with its axial direction referred to as the first direction. The shell has an inlet and an outlet. Multiple baffles are arranged sequentially within the shell along the first direction, each baffle having multiple through holes. A spiral flow channel is defined between the baffles and the shell. Each baffle can rotate around its own axis and move along the first direction. Multiple medium tubes are arranged within the shell along the first direction and penetrate the shell. Each medium tube passes through a baffle via multiple first springs, which are evenly distributed circumferentially and are spiral-shaped. The shell has a first chamber and a second chamber at its two ends along the first direction. The first chamber has an inlet, and the second chamber has an outlet. The two ends of the medium tubes communicate with the first and second chambers, respectively. Baffles are provided at both ends of the shell, and transmission components are mounted on the baffles. These transmission components can drive… The medium tube revolves around the axis of the shell while simultaneously rotating around its own axis. The transmission components include a main gear, a gear ring, a planetary carrier, a motor, and multiple driven gears. The gear ring is fixedly mounted on the baffle, the planetary carrier is rotatably mounted on the baffle, and the main gear is rotatably mounted on the planetary carrier via the motor. Multiple driven gears are rotatably mounted on the planetary carrier, and the driven gears mesh with both the main gear and the gear ring. Each driven gear corresponds to a medium tube, and the medium tube is fixedly connected to its corresponding driven gear and passes through the driven gear in a first direction. The rotation of the medium tube enables the baffle plate to move in the first direction. The medium tube is a spiral tube, and the spiral axis of the medium tube is in the same direction as the spiral axis of the first spring plate. Each baffle plate has a through hole for the medium tube to pass through, and the first spring plate is fixedly mounted in the through hole. Multiple second spring plates are provided on the outer peripheral wall of each baffle plate. The second spring plates are spiral in shape, and the spiral axis of the second spring plates is in the same direction as the spiral axis of the first spring plate.

2. The continuous flow tubular reactor according to claim 1, characterized in that: All the baffles are bow-shaped.

3. A continuous flow tubular reactor according to claim 1, characterized in that: Both the first and second chambers are equipped with support plates for supporting the motor, and the motor is covered with a sealing shell.

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