Tubular dynamic reactor

Abstract

The invention provides a tubular dynamic reactor, and belongs to the technical field of chemical equipment. The problem that an existing tubular reactor is poor in heat exchange efficiency is solved. According to the tubular dynamic reactor, an annular heat exchange cavity is formed between a barrel and a heat exchange tube, fins are wound on the heat exchange tube, an arc-shaped first half tube and an arc-shaped second half tube are fixedly connected outside the barrel in the axial direction of the barrel, a first flow channel is formed between the first half tube and the barrel, a second flow channel is formed between the second half tube and the barrel, and the first flow channel and the second flow channel are communicated with each other. A first water through hole and a second water through hole are formed in the barrel in the axial direction of the barrel, the first flow channel communicates with the second flow channel through the first water through hole, the heat exchange cavity and the second water through hole, and annular main bodies of the partition plates are fixedly connected into the heat exchange cavity at intervals in the axial direction of the barrel. The partition parts of the partition plates penetrate through the barrel and are alternately arranged in the first flow channel and the second flow channel in the axial direction of the barrel, and the first flow channel, the heat exchange cavity and the second flow channel are divided into S-shaped flow channels. The tubular dynamic reactor has the advantage of high heat exchange efficiency.

Description

Technical Field

[0001] This invention belongs to the field of chemical equipment technology and relates to tubular dynamic reactors. Background Technology

[0002] A tubular dynamic reactor is a tubular continuous flow device used for chemical reactions. It enables the transformation from batch production to continuous production by allowing reactants to flow and react within the tube.

[0003] Existing tubular dynamic reactors, such as the reaction stirring shaft and vertical dynamic tubular reactor disclosed in Chinese patent literature [Patent No.: 202411951167.6; Application Publication No.: CN119657049A], include a shaft with rotating shaft sealing structures formed at both its upper and lower ends, and a transmission structure formed above the rotating shaft sealing structure at its upper end, the transmission structure being used for external driving; a first stirring structure is formed on the shaft for stirring the reaction materials; and a first clearance structure is formed in the middle of the shaft.

[0004] In this type of tubular reactor, a heat exchange jacket is formed between the stirring shaft and the shell, located near the inner wall of the shell. This jacket provides the necessary temperature environment for the reaction. The heat exchange medium inlet is located in the lower part of the shell, and the outlet is located in the upper part. In this structure, the circumferential inner wall of the heat exchange jacket is in contact with the reactants. The heat exchange area between the heat medium and the materials is only the surface area of ​​the circumferential inner wall of the jacket, resulting in a small heat exchange area. Furthermore, the heat medium flows directly through the jacket during its flow, leading to a short residence time and a short heat exchange time. Consequently, the heat exchange efficiency of this type of tubular reactor is poor. Summary of the Invention

[0005] The purpose of this invention is to address the aforementioned problems in the prior art by proposing a tubular dynamic reactor, which solves the technical problem of how to improve the heat exchange efficiency of the tubular dynamic reactor.

[0006] The objective of this invention can be achieved through the following technical solution: a tubular dynamic reactor, comprising a cylindrical body, heat exchange tubes passing through the cylindrical body, and a stirring structure passing through the heat exchange tubes, characterized in that it further comprises an arc-shaped first half-tube, an arc-shaped second half-tube, and a plurality of baffles, wherein an annular heat exchange cavity is formed between the cylindrical body and the heat exchange tubes, and spiral fins are wound around the circumferential outer wall of the heat exchange tubes; the first half-tube and the second half-tube are axially fixed to the outside of the cylindrical body, a first flow channel is formed between the first half-tube and the cylindrical body, and a second flow channel is formed between the second half-tube and the cylindrical body. The cylinder is provided with at least one row of first water passage holes and at least one row of second water passage holes along its own axial direction. The first flow channel is connected to the first water passage holes, the heat exchange cavity, the second water passage holes, and the second flow channel. The partition includes an annular main body and a partition portion protruding from the main body. The main body is fixedly connected to the heat exchange cavity at intervals along the axial direction of the cylinder. The partition portion passes through the cylinder and is alternately arranged in the first flow channel and the second flow channel along the axial direction of the cylinder, dividing the first flow channel, the heat exchange cavity, and the second flow channel into a serpentine flow channel.

[0007] During operation, the medium enters the first flow channel and then flows into the heat exchange chamber through the first water inlet. The medium exchanges heat with the fins, and the fins effectively increase the heat exchange area of ​​the heat exchange tubes, thereby improving the heat exchange efficiency of the tubular dynamic reactor. The medium then flows out through the second water inlet into the second flow channel and flows along it. It then enters the next section of the heat exchange chamber through the second water inlet and exchanges heat with the fins again. The medium then flows out through the first water inlet into the first flow channel and flows along it. It then enters the next section of the heat exchange chamber through the first water inlet and exchanges heat with the fins again. This process repeats multiple times, causing the medium to flow along a serpentine flow path within the tubular dynamic reactor. The longer the flow distance and residence time of the medium, the longer the heat exchange time, thus improving the heat exchange efficiency of the tubular reactor. A first water inlet and a second water inlet are provided on the cylinder body, and an additional first half-pipe and a second half-pipe are added to form a first flow channel and a second flow channel. The first water inlet, the second water inlet, the first flow channel and the second flow channel are all arranged along the axial direction of the cylinder body. The medium fills the first flow channel and the second flow channel, ensuring that the medium can contact all the fins after entering the heat exchange cavity through the first water inlet and the second water inlet. This ensures that the medium can flow to the root of the fins and that the medium located at the root of the fins can flow with the wave, preventing dead zones at the root of the fins, promoting turbulence and uniform flow, avoiding the medium taking flow shortcuts, avoiding medium short circuits, and enabling the medium to fully exchange heat with the fins and heat exchange tubes, thereby improving heat exchange efficiency.

[0008] In the aforementioned tubular dynamic reactor, both the first and second water passages are circular. All the first water passages and all the second water passages are spaced apart along the axial direction of the cylindrical body. This structure ensures that the medium in the first and second flow channels can flow into the heat exchange chamber through the first and second water passages, and ensures that all fins can contact the medium, preventing the medium from taking shortcuts and ensuring sufficient heat exchange between the medium and all fins in the heat exchange chamber, thus improving heat exchange efficiency.

[0009] In the aforementioned tubular dynamic reactor, the first and second water passages have the same diameter, and both diameters are larger than the spacing between the fins along the axial direction of the cylinder. This structure ensures that all fins can contact the medium, preventing the medium from taking shortcuts and ensuring sufficient heat exchange between the medium and all fins in the heat exchange chamber, thereby improving heat exchange efficiency.

[0010] In the aforementioned tubular dynamic reactor, the fins are located within the heat exchange chamber, and there is a gap between the fins and the cylindrical body. This structure allows the medium entering the first and second flow channels from the first and second water inlets to be fully dispersed, preventing the medium from taking shortcuts and ensuring sufficient heat exchange between the medium and all the fins in the heat exchange chamber, thereby improving heat exchange efficiency.

[0011] In the aforementioned tubular dynamic reactor, the first and second half-tubes are symmetrically arranged, and the partitions of adjacent baffles face opposite directions. This structure allows for more rational flow of the medium, more uniform heat exchange, and improved heat exchange efficiency.

[0012] In the above-mentioned tubular dynamic reactor, the tubular dynamic reactor further includes an inlet pipe and an outlet pipe. The inlet pipe is fixedly connected to the bottom of the first half-pipe and is connected to the first flow channel. The outlet pipe is fixedly connected to the top of the second half-pipe and is connected to the second flow channel.

[0013] In the aforementioned tubular dynamic reactor, the stirring structure includes a stirring shaft passing through the heat exchange tube. Several elongated stirring blades are fixedly connected to the stirring shaft. These blades are arranged axially along the cylindrical body, and scrapers are fixedly connected to the outer sides of the blades. The blades are positioned adjacent to the heat exchange tube, and the scrapers are in contact with the inner wall of the heat exchange tube. This structure enables the stirring structure to perform both stirring and wall scraping functions, preventing material adhesion to the inner wall of the heat exchange tube, ensuring the heat exchange function of the heat exchange tube, and thus improving heat exchange efficiency.

[0014] In the aforementioned tubular dynamic reactor, the reactor further includes a feeder. The tops of both the cylindrical body and the heat exchange tubes are flared, and a cover plate is fixedly connected to the top of the heat exchange tubes. The inner end of the feeder passes through the cover plate and extends into the top of the heat exchange tubes. This structure, with its rational arrangement and efficient use of space, allows material to enter the reactor through the top-mounted feeder, demonstrating a well-designed system. The feeder is a Venturi injector with a slight negative pressure function, generating a certain suction force to facilitate the rapid addition of solid materials. This prevents the accumulation of solid materials near the inlet, solving the problem of wall clogging when feeding poorly flowing solid powders.

[0015] In the aforementioned tubular dynamic reactor, the tubular dynamic reactor further includes a top plate, which comprises an annular body and two protruding sealing portions outside the body. The two sealing portions are symmetrically arranged. The body is used to seal the top of the heat exchange chamber, and the two sealing portions are used to seal the top of the first flow channel and the top of the second flow channel, respectively. This structure prevents the medium from overflowing.

[0016] In the aforementioned tubular dynamic reactor, the outer shell, the first half-tube, and the second half-tube are covered with an insulation layer. The top of the insulation layer covers the top end of the heat exchange tube and the top plate. The insulation layer serves to maintain the temperature, allowing the medium to perform better heat exchange and improving heat exchange efficiency.

[0017] Compared with the prior art, the tubular dynamic reactor provided by the present invention has the following advantages:

[0018] 1. This tubular dynamic reactor has a first water inlet and a second water inlet on the shell, and additionally a first half-pipe and a second half-pipe are added to form a first flow channel and a second flow channel. The medium fills the first flow channel and the second flow channel, ensuring that the medium can contact all the fins after entering the heat exchange chamber through the first water inlet and the second water inlet. This ensures that the medium can flow to the root of the fins and that the medium at the root of the fins can flow with the wave, preventing dead zones at the root of the fins, promoting turbulent and uniform flow, avoiding the medium taking flow shortcuts, avoiding medium short circuits, and enabling the medium to fully exchange heat with the fins and heat exchange tubes, thereby improving the heat exchange efficiency.

[0019] 2. This tubular dynamic reactor uses baffles to separate the first flow channel, heat exchange chamber, and second flow channel into a serpentine flow path. This allows the medium to flow along the serpentine flow path in the tubular dynamic reactor, resulting in a longer flow distance, longer residence time, and longer heat exchange time, thereby improving the heat exchange efficiency of the tubular reactor. Attached Figure Description

[0020] Figure 1 This is a cross-sectional view of the overall structure of this tubular dynamic reactor and a schematic diagram of the vertical flow direction of the medium.

[0021] Figure 2 This is a tubular dynamic reactor Figure 1 Sectional view along direction AA.

[0022] Figure 3 This is a tubular dynamic reactor Figure 1 A magnified view of region B in the middle.

[0023] Figure 4 This is a top view of the baffle of this tubular dynamic reactor.

[0024] Figure 5 This is a top view of the top plate of this tubular dynamic reactor.

[0025] In the diagram, 1. Cylinder; 2. Heat exchange tube; 3. Stirring structure; 31. Stirring shaft; 32. Stirring blade; 33. Scraper; 4. First half-pipe; 5. Second half-pipe; 6. Baffle; 61. Main body; 62. Separator; 7. Heat exchange chamber; 8. Fin; 9. First flow channel; 10. Second flow channel; 11. First water passage; 12. Second water passage; 13. Water inlet pipe; 14. Water outlet pipe; 15. Feeder; 16. Cover plate; 17. Top plate; 171. Main body; 172. Sealing part; 18. Insulation layer. Detailed Implementation

[0026] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0027] like Figure 1 , Figure 3 As shown, this tubular dynamic reactor includes a cylinder 1, a heat exchange tube 2, a stirring structure 3, a first half-tube 4, a second half-tube 5, a baffle 6, fins 8, an inlet pipe 13, an outlet pipe 14, a feeder 15, a cover plate 16, a top plate 17, and an insulation layer 18.

[0028] The cylinder 1 is cylindrical, and the heat exchange tube 2 is inserted inside the cylinder 1, forming an annular heat exchange cavity 7 between the cylinder 1 and the heat exchange tube 2. Spiral fins 8 are wound around the outer circumferential wall of the heat exchange tube 2, and the fins 8 are located within the heat exchange cavity 7, with a gap between the fins 8 and the cylinder 1. A stirring structure 3 is inserted inside the heat exchange tube 2, including a stirring shaft 31 inserted within the heat exchange tube 2. Elongated stirring blades 32 are fixedly connected to the stirring shaft 31, and the stirring blades 32 are arranged axially along the cylinder 1. Scrapers 33 are fixedly connected to the outer side of the stirring blades 32, and the stirring blades 32 are positioned adjacent to the heat exchange tube 2, with the scrapers 33 adhering to the inner wall of the heat exchange tube 2. In this embodiment, the number of stirring blades 32 is seven; in actual production, the number of stirring blades 32 can be five or nine.

[0029] like Figure 2As shown, the first half-pipe 4 is arc-shaped, and the second half-pipe 5 is arc-shaped. The first half-pipe 4 and the second half-pipe 5 are fixedly connected to the outside of the cylinder 1 along the axial direction of the cylinder 1. The first half-pipe 4 and the second half-pipe 5 are symmetrically arranged. A first flow channel 9 is formed between the first half-pipe 4 and the cylinder 1, and a second flow channel 10 is formed between the second half-pipe 5 and the cylinder 1. The water inlet pipe 13 is fixedly connected to the bottom of the first half-pipe 4 and is connected to the first flow channel 9. The water outlet pipe 14 is fixedly connected to the top of the second half-pipe 5 and is connected to the second flow channel 10.

[0030] In this embodiment, the cylinder 1 has a row of first water passage holes 11 and a row of second water passage holes 12 arranged along its own axial direction. There are sixty of each row of first water passage holes 11 and second water passage holes 12. Both the first water passage holes 11 and second water passage holes 12 are circular holes with the same diameter. The diameter of both the first water passage holes 11 and second water passage holes 12 is larger than the spacing between the fins 8 along the axial direction of the cylinder 1. All the first water passage holes 11 are spaced apart along the axial direction of the cylinder 1, and all the second water passage holes 12 are spaced apart along the axial direction of the cylinder 1. In actual production, there can be two or three rows of first water passage holes 11 and second water passage holes 12, and the number of each row of first water passage holes 11 and second water passage holes 12 can be forty or four. The first flow channel 9 is connected to the first water passage holes 11, the heat exchange chamber 7, the second water passage holes 12, and the second flow channel 10.

[0031] In this embodiment, there are six partitions 6. In actual production, the number of partitions 6 can be four or eight. Figure 4 As shown, the baffle 6 includes an annular main body 61 and a partition 62 protruding from the main body 61. The main body 61 is fixedly connected to the heat exchange chamber 7 at intervals along the axial direction of the cylinder 1. The partition 62 passes through the cylinder 1 and is alternately arranged in the first flow channel 9 and the second flow channel 10 along the axial direction of the cylinder 1. The partitions 62 of two adjacent baffles 6 are oriented in opposite directions, dividing the first flow channel 9, the heat exchange chamber 7 and the second flow channel 10 into a serpentine flow channel.

[0032] Both the top of the cylinder 1 and the heat exchange tube 2 are flared. A cover plate 16 is fixedly connected to the top of the heat exchange tube 2. The inner end of the feeder 15 passes through the cover plate 16 and extends into the top of the heat exchange tube 2. Figure 5 As shown, the top plate 17 includes an annular body 171 and two protruding sealing portions 172 disposed outside the body 171. The two sealing portions 172 are symmetrically arranged. The body 171 is used to seal the top of the heat exchange chamber 7, and the two sealing portions 172 are used to seal the top of the first flow channel 9 and the top of the second flow channel 10, respectively. The cylinder 1, the first half-pipe 4 and the second half-pipe 5 are covered with a heat insulation layer 18. The top of the heat insulation layer 18 covers the top end of the heat exchange tube 2 and the top plate 17.

[0033] During operation, the medium enters the bottom section of the first flow channel 9 through the inlet pipe 13 and fills the bottom section of the first flow channel 9. The medium flows into the heat exchange chamber 7 through the first water inlet 11. After heat exchange with the fins 8 and heat exchange tubes 2, the medium flows to the bottom section of the second flow channel 10 through the second water inlet 12. The continuous flow of the medium causes it to flow upward along the second flow channel 10 and fill the bottom section of the second flow channel 10. The medium then flows into the next heat exchange chamber 7 through the second water inlet 12, where it undergoes heat exchange with the fins 8 and heat exchange tubes 2. After the exchange, the medium flows through the first water inlet 11 to the next section of the first flow channel 9. The continuous flow of the medium causes it to flow upward along the first flow channel 9 and fill the next section of the first flow channel 9. The medium then flows through the first water inlet 11 into the heat exchange chamber 7 of the next section. After the medium exchanges heat with the fins 8 and the heat exchange tube 2, it flows through the second water inlet 12 to the next section of the second flow channel 10. The flow of the medium repeats the above steps multiple times, causing the medium to flow along the serpentine flow channel in the tubular dynamic reactor. Finally, the medium is discharged through the outlet pipe 14.

[0034] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

[0035] Although this document frequently uses terms such as cylinder 1, heat exchange tube 2, stirring structure 3, stirring shaft 31, stirring blade 32, scraper 33, first half-tube 4, second half-tube 5, partition 6, main body 61, partition 62, heat exchange chamber 7, fins 8, first flow channel 9, second flow channel 10, first water inlet 11, second water inlet 12, water inlet pipe 13, water outlet pipe 14, feeder 15, cover plate 16, top plate 17, body 171, sealing part 172, and insulation layer 18, the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of the invention; interpreting them as any additional limitation would contradict the spirit of the invention.

Claims

1. A tubular dynamic reactor, comprising a cylindrical body (1), heat exchange tubes (2) passing through the cylindrical body (1), and a stirring structure (3) passing through the heat exchange tubes (2), characterized in that, It also includes an arc-shaped first half-pipe (4), an arc-shaped second half-pipe (5), and several baffles (6). An annular heat exchange cavity (7) is formed between the cylinder (1) and the heat exchange tube (2). Spiral fins (8) are wound around the outer circumferential wall of the heat exchange tube (2). The first half-pipe (4) and the second half-pipe (5) are fixedly connected to the outside of the cylinder (1) along the axial direction. A first flow channel (9) is formed between the first half-pipe (4) and the cylinder (1), and a second flow channel (10) is formed between the second half-pipe (5) and the cylinder (1). The cylinder (1) is provided with at least one row of first water passage holes (11) and at least one row of second water passage holes (11) along its own axial direction. 12), the first flow channel (9) is connected through the first water passage (11), the heat exchange chamber (7), the second water passage (12) and the second flow channel (10). The partition (6) includes an annular body (61) and a partition (62) protruding from the body (61). The body (61) is fixedly connected to the heat exchange chamber (7) at intervals along the axial direction of the cylinder (1). The partition (62) passes through the cylinder (1) and is alternately arranged in the first flow channel (9) and the second flow channel (10) along the axial direction of the cylinder (1), dividing the first flow channel (9), the heat exchange chamber (7) and the second flow channel (10) into a serpentine flow channel.

2. The tubular dynamic reactor according to claim 1, characterized in that, Both the first water passage (11) and the second water passage (12) are circular holes. All the first water passages (11) are spaced apart along the axial direction of the cylinder (1), and all the second water passages (12) are spaced apart along the axial direction of the cylinder (1).

3. The tubular dynamic reactor according to claim 1, characterized in that, The first water passage (11) and the second water passage (12) have the same diameter, and the diameter of the first water passage (11) and the second water passage (12) is greater than the spacing of the fins (8) along the axial direction of the cylinder (1).

4. The tubular dynamic reactor according to claim 1, 2, or 3, characterized in that, The fins (8) are located in the heat exchange chamber (7), and there is a gap between the fins (8) and the cylinder (1).

5. The tubular dynamic reactor according to claim 1, 2, or 3, characterized in that, The first half-tube (4) and the second half-tube (5) are arranged symmetrically, and the partitions (62) of the two adjacent partitions (6) are oriented in opposite directions.

6. The tubular dynamic reactor according to claim 1, 2, or 3, characterized in that, The tubular dynamic reactor also includes an inlet pipe (13) and an outlet pipe (14). The inlet pipe (13) is fixed to the bottom of the first half-pipe (4) and is connected to the first flow channel (9). The outlet pipe (14) is fixed to the top of the second half-pipe (5) and is connected to the second flow channel (10).

7. The tubular dynamic reactor according to claim 1, 2, or 3, characterized in that, The stirring structure (3) includes a stirring shaft (31) passing through the heat exchange tube (2). Several long stirring blades (32) are fixedly connected to the stirring shaft (31). The stirring blades (32) are arranged along the axial direction of the cylinder (1). A scraper (33) is fixedly connected to the outer side of the stirring blades (32). The stirring blades (32) are arranged adjacent to the heat exchange tube (2). The scraper (33) is in contact with the inner wall of the heat exchange tube (2).

8. The tubular dynamic reactor according to claim 1, 2, or 3, characterized in that, The tubular dynamic reactor also includes a feeder (15). The tops of the cylinder (1) and the heat exchange tube (2) are both flared. A cover plate (16) is fixedly connected to the top of the heat exchange tube (2). The inner end of the feeder (15) passes through the cover plate (16) and extends into the top of the heat exchange tube (2).

9. The tubular dynamic reactor according to claim 1, 2, or 3, characterized in that, The tubular dynamic reactor also includes a top plate (17), which includes an annular body (171) and two plugs (172) protruding from the body (171). The two plugs (172) are symmetrically arranged. The body (171) is used to block the top of the heat exchange chamber (7), and the two plugs (172) are used to block the top of the first flow channel (9) and the top of the second flow channel (10), respectively.

10. The tubular dynamic reactor according to claim 9, characterized in that, The cylinder (1), the first half-pipe (4) and the second half-pipe (5) are covered with a heat insulation layer (18), and the top of the heat insulation layer (18) covers the end of the top of the heat exchange tube (2) and the top plate (17).

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