AMPS tubular reaction continuous production device

Abstract

An AMPS tubular reaction continuous production device relates to the technical field of reaction devices and comprises a horizontally arranged reaction pipeline, a cylindrical heat exchange shell is coaxially and fixedly connected to the outer wall of the reaction pipeline, a heat exchange area is formed between the outer wall of the reaction pipeline and the inner wall of the cylindrical heat exchange shell, a spiral flow guide ring piece is fixedly connected in the heat exchange area, and the spiral flow guide ring piece is fixedly connected with the outer wall of the reaction pipeline. A central shaft is coaxially and rotatably arranged in the reaction pipeline, a plurality of stirring blades are fixedly connected to the peripheral wall of the central shaft in parallel in the axial direction, and the inclination directions of the adjacent stirring blades are opposite. According to the utility model, the problems that a tubular reactor in the prior art is limited by a mixing structure in the use process and the mixing property of various materials in a pipeline is poor are solved, so that the length of the tubular reactor is prolonged, and the occupied space volume and the production cost are increased; and the problem that the heat exchange efficiency is reduced due to the fact that a heat exchange medium cannot fully act on materials in the tubular reactor due to the fact that an existing tubular reactor is limited by the influence of a heat exchange structure in the reaction process is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of reaction devices, in particular to an AMPS tubular reaction continuous production device. Background Art

[0002] 2-Acrylamido-2-methylpropanesulfonic acid (AMPS) is a white crystalline solid. It is an acrylamide-based anionic monomer and also a vinyl monomer with a sulfonic acid group. It has excellent hydrolytic stability, conductivity, dyeing affinity, acid and alkali resistance, thermal stability and good tolerance to divalent cations. The presence of double bonds gives it good addition and polymerization properties. It is now widely used in industrial production such as textiles, spinning, dyeing, plastics, papermaking, coatings, sewage treatment and oil extraction, and is an important chemical raw material and additive.

[0003] Currently, domestic AMPS production processes primarily utilize fuming sulfuric acid, acrylonitrile, and isobutylene as raw materials via a one-step or two-step process. The one-step process, however, is preferred by manufacturers due to its lower investment. Both methods typically utilize reactors, which suffer from low heat exchange efficiency, high equipment investment, low production yields, and a high level of reactor residue.

[0004] Tubular reactors are commonly used in chemical production, featuring a tubular reaction chamber and a high aspect ratio. Tubular reactors offer minimal backmixing, resulting in high volumetric efficiency, making them particularly suitable for applications requiring high conversion rates or involving cascaded side reactions. However, their primary disadvantage is that low reaction rates often require excessively long tubing and a large reactor volume. Furthermore, compared to tank reactors, tubular reactors are less able to dissipate reaction heat, significantly limiting their application.

[0005] The prior art discloses a patent with publication number CN115709047A, which includes an inner tube, an outer tube, a dynamic mixing structure, a liquid ammonia inlet, a steam inlet, a sulfuric acid inlet, and a nozzle. A partition is provided in the inner tube to partition the interior of the inner tube and form a first mixing chamber and a second mixing chamber from its feed end to its discharge end, respectively. The outer tube includes a first pipe and a second pipe that are connected to each other, forming a flow-equalizing chamber between the first pipe and the inner tube, which is connected to the first mixing chamber. The dynamic mixing structure includes a driving member and a mixing member. The liquid ammonia inlet and the steam inlet are both connected to the feed end of the inner tube, the sulfuric acid inlet is connected to the flow-equalizing chamber, and the nozzle is connected to the second mixing chamber for extending into the granulation drum to spray onto the material layer. The present invention achieves sufficient mixing of the raw materials by dynamically introducing, mixing, and diverting the raw materials, thereby realizing continuous fertilizer production and improving granulation performance.

[0006] The existing devices including the above patents have gradually exposed the shortcomings of the existing technology as they are used, mainly in the following aspects:

[0007] First, during use, the existing tubular reactor is limited by the influence of the mixing structure, and the mixing of various materials in the pipeline is poor, which extends the length of the tubular reactor, increases the space volume occupied and the production cost.

[0008] Second, during the reaction process, the existing tubular reactor is limited by the influence of the heat exchange structure, so that the heat exchange medium cannot fully act on the materials in the tubular reactor, thereby reducing the heat exchange efficiency.

[0009] In summary, the existing technology has obvious inconveniences and defects in actual use, so it is necessary to improve it. Utility Model Content

[0010] In response to the defects in the existing technology, the AMPS tubular reaction continuous production device provided by the utility model is used to solve the problems that during the use of the tubular reactor in the traditional technology, the mixing properties of various materials in the pipeline are poor, which extends the length of the tubular reactor, increases the space volume occupied and the production cost; and the existing tubular reactor is limited by the influence of the heat exchange structure during the reaction process, so that the heat exchange medium cannot fully act on the materials in the tubular reactor, thereby reducing the heat exchange efficiency.

[0011] To achieve the above purpose, the present invention provides the following technical solutions:

[0012] The AMPS tubular reaction continuous production device includes a horizontally arranged reaction pipe, a cylindrical heat exchange shell coaxially fixed to the outer wall of the reaction pipe, and a heat exchange area is formed between the outer wall of the reaction pipe and the inner wall of the cylindrical heat exchange shell, and a spiral guide ring is fixed to the heat exchange area.

[0013] A central shaft is coaxially rotated in the reaction tube, and a plurality of stirring blades are fixedly connected to the peripheral wall of the central shaft in parallel along the axial direction. The adjacent stirring blades are arranged with inclination directions opposite to each other.

[0014] As an optimized solution, one end of the reaction tube is coaxially fixed with a feed barrel connected to its inner cavity, and a drive shaft is coaxially rotated inside the feed barrel. Mixing blades are fixed on the drive shaft, and the rotation speed of the drive shaft is greater than the rotation speed of the central shaft.

[0015] As an optimized solution, the outer end of the feed barrel is sealed, and a plurality of feeding barrels are arranged around the peripheral wall of the feed barrel.

[0016] As an optimized solution, a coaxial reducer is fixedly connected in the feeding barrel, one end of the driving shaft is connected to the power input end of the coaxial reducer, and the power output end of the coaxial reducer is fixedly connected to one end of the central shaft.

[0017] As an optimized solution, the opposite ends of adjacent stirring blades are staggered in the radial direction.

[0018] As an optimized solution, the outer wall of the stirring blade is in frictional contact with the inner wall of the reaction pipe.

[0019] As an optimized solution, the outer end of the feed barrel is fixedly connected to a driving machine, and the power output end of the driving machine is fixedly connected to the other end of the driving shaft.

[0020] As an optimized solution, two support rods are fixedly connected in parallel in the feeding barrel, and the housing of the coaxial reducer is fixedly connected to the two support rods.

[0021] As an optimized solution, the outer ring of the spiral guide ring is fixedly connected to the inner wall of the cylindrical heat exchange shell, and the inner ring of the spiral guide ring is fixedly connected to the outer wall of the reaction pipe.

[0022] As an optimized solution, a medium inlet tube and a medium outlet tube communicating with the heat exchange area are fixedly connected to the outer wall of the cylindrical heat exchange shell, and the medium inlet tube and the medium outlet tube are close to both ends of the cylindrical heat exchange shell.

[0023] As an optimized solution, a discharge cylinder is fixedly connected to the end of the reaction pipe opposite to the feed cylinder.

[0024] Compared with the prior art, the beneficial effects of the present invention are:

[0025] Through the surrounding several feeding cylinders, it is possible to connect different material sources and introduce materials. The driving machine drives the mixing blades to rotate rapidly to achieve preliminary mixing of various added materials. The coaxial reducer drives the stirring blades to rotate at a low speed. Since the inclination directions of adjacent stirring blades are opposite, the materials can be moved by convection in the reaction pipe using the stirring blades with opposite inclination directions, which can increase the displacement of the materials in the reaction pipe and improve the mixing efficiency.

[0026] By fixing a cylindrical heat exchange shell to the outside of the reaction pipe and fixing a spiral guide ring to the inside, the heat exchange medium is introduced and the spiral guide ring is used to evenly flow inside to achieve heat exchange of the material in the reaction pipe. Since the contact area between the coiled heat exchange tube and the reaction pipe in traditional technology is small, the contact area between the heat exchange medium and the reaction pipe is increased, thereby improving the heat exchange efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly describes the drawings required for the specific embodiments or the description of the prior art. Similar elements or parts are generally identified by similar reference numerals throughout the drawings. Elements or parts in the drawings are not necessarily drawn to scale.

[0028] Figure 1 It is a structural diagram of the present utility model.

[0029] In the figure: 1-reaction pipe; 2-cylindrical heat exchange shell; 3-spiral guide ring; 4-medium inlet tube; 5-medium discharge tube; 6-discharge tube; 7-center axis; 8-stirring blade; 9-feed tube; 10-adding tube; 11-driving machine; 12-driving shaft; 13-mixing blade; 14-coaxial reducer; 15-support rod. DETAILED DESCRIPTION

[0030] The following embodiments of the technical solution of the present invention are described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention and are therefore only examples and are not intended to limit the scope of protection of the present invention.

[0031] like Figure 1 As shown, the AMPS tubular reaction continuous production device includes a horizontally arranged reaction pipe 1, a cylindrical heat exchange shell 2 is coaxially fixed to the outer wall of the reaction pipe 1, and a heat exchange area is formed between the outer wall of the reaction pipe 1 and the inner wall of the cylindrical heat exchange shell 2, and a spiral guide ring 3 is fixed in the heat exchange area.

[0032] A central shaft 7 is coaxially rotated in the reaction tube 1 , and a plurality of stirring blades 8 are fixedly connected to the peripheral wall of the central shaft 7 in parallel along the axial direction. Adjacent stirring blades 8 are arranged with opposite inclination directions.

[0033] One end of the reaction tube 1 is coaxially fixed with a feed barrel 9 connected to its inner cavity. A drive shaft 12 is coaxially rotated in the feed barrel 9. A mixing blade 13 is fixed to the drive shaft 12. The rotation speed of the drive shaft 12 is greater than that of the central shaft 7.

[0034] The outer end of the feed cylinder 9 is sealed, and a plurality of feeding cylinders 10 are arranged around the peripheral wall of the feed cylinder 9 .

[0035] A coaxial reducer 14 is fixedly connected inside the feed barrel 9 , one end of the drive shaft 12 is connected to the power input end of the coaxial reducer 14 , and the power output end of the coaxial reducer 14 is fixedly connected to one end of the central shaft 7 .

[0036] The opposite ends of adjacent stirring blades 8 are staggered in the radial direction.

[0037] The outer wall of the stirring blade 8 is in frictional contact with the inner wall of the reaction pipe 1 .

[0038] The outer end of the feed cylinder 9 is fixedly connected to a driving machine 11 , and the power output end of the driving machine 11 is fixedly connected to the other end of the driving shaft 12 .

[0039] Two supporting rods 15 are fixedly connected in parallel in the feeding barrel 9 , and the outer shell of the coaxial reducer 14 is fixedly connected to the two supporting rods 15 .

[0040] The outer ring of the spiral guide ring piece 3 is fixedly connected to the inner wall of the cylindrical heat exchange shell 2 , and the inner ring of the spiral guide ring piece 3 is fixedly connected to the outer wall of the reaction pipe 1 .

[0041] A medium inlet tube 4 and a medium outlet tube 5 communicating with the heat exchange area are fixedly connected to the outer wall of the cylindrical heat exchange shell 2 . The medium inlet tube 4 and the medium outlet tube 5 are close to both ends of the cylindrical heat exchange shell 2 .

[0042] A discharge cylinder 6 is fixedly connected to the end of the reaction pipe 1 opposite to the feed cylinder 9 .

[0043] The working principle of this device is:

[0044] Through the surrounding several feeding cylinders 10, it is possible to connect different material sources and introduce materials. The driving machine 11 drives the mixing blades 13 to rotate rapidly to achieve preliminary mixing of the various added materials. The coaxial reducer 14 drives the stirring blades 8 to rotate at a low speed. Since the inclination directions of adjacent stirring blades 8 are opposite, the materials can be moved by convection in the reaction pipe 1 using the stirring blades 8 with opposite inclination directions, which can increase the displacement of the materials in the reaction pipe 1 and improve the mixing efficiency.

[0045] By fixing the cylindrical heat exchange shell 2 to the outside of the reaction pipe 1 and fixing the spiral guide ring 3 to the inside, the heat exchange medium is introduced and the spiral guide ring 3 is used to flow evenly inside to achieve heat exchange of the material in the reaction pipe 1. Since the contact area between the coiled heat exchange tube and the reaction pipe 1 in traditional technology is small, the contact area between the heat exchange medium and the reaction pipe 1 is increased, thereby improving the heat exchange efficiency.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and description of the present invention.

Claims

1. AMPS tubular reaction continuous production device, characterized by: The invention comprises a horizontally arranged reaction pipe (1), wherein a cylindrical heat exchange shell (2) is coaxially fixedly connected to the outer wall of the reaction pipe (1), and a heat exchange area is formed between the outer wall of the reaction pipe (1) and the inner wall of the cylindrical heat exchange shell (2), wherein a spiral guide ring (3) is fixedly connected in the heat exchange area. A central shaft (7) is coaxially rotated in the reaction pipe (1), and a plurality of stirring blades (8) are fixedly connected to the peripheral wall of the central shaft (7) in parallel along the axial direction, with adjacent stirring blades (8) being arranged with opposite inclination directions.

2. The AMPS tubular reaction continuous production device according to claim 1, characterized in that: One end of the reaction pipe (1) is coaxially fixedly connected to a feed barrel (9) communicating with its inner cavity. A drive shaft (12) is coaxially rotated in the feed barrel (9). A mixing blade (13) is fixedly connected to the drive shaft (12). The rotation speed of the drive shaft (12) is greater than the rotation speed of the central shaft (7).

3. The AMPS tubular reaction continuous production device according to claim 2, characterized in that: The outer end of the feed cylinder (9) is sealed, and a plurality of feeding cylinders (10) are arranged around the peripheral wall of the feed cylinder (9).

4. The AMPS tubular reaction continuous production device according to claim 3, characterized in that: A coaxial reducer (14) is fixedly connected inside the feed barrel (9), one end of the drive shaft (12) is connected to the power input end of the coaxial reducer (14), and the power output end of the coaxial reducer (14) is fixedly connected to one end of the central shaft (7).

5. The AMPS tubular reaction continuous production device according to claim 4, characterized in that: The opposite ends of the adjacent stirring blades (8) are staggered in the radial direction, and the outer walls of the stirring blades (8) are in frictional contact with the inner wall of the reaction pipe (1).

6. The AMPS tubular reaction continuous production device according to claim 5, characterized in that: The outer end of the feeding cylinder (9) is fixedly connected to a driving machine (11), and the power output end of the driving machine (11) is fixedly connected to the other end of the driving shaft (12).

7. The AMPS tubular reaction continuous production device according to claim 6, characterized in that: Two support rods (15) are fixedly connected in parallel in the feeding barrel (9), and the outer shell of the coaxial reducer (14) is fixedly connected to the two support rods (15).

8. The AMPS tubular reaction continuous production device according to claim 7, characterized in that: The outer ring of the spiral guide ring (3) is fixedly connected to the inner wall of the cylindrical heat exchange shell (2), and the inner ring of the spiral guide ring (3) is fixedly connected to the outer wall of the reaction pipe (1).

9. The AMPS tubular reaction continuous production device according to claim 8, characterized in that: A medium inlet tube (4) and a medium outlet tube (5) communicating with the heat exchange area are fixedly connected to the outer wall of the cylindrical heat exchange shell (2). The medium inlet tube (4) and the medium outlet tube (5) are close to both ends of the cylindrical heat exchange shell (2).

10. The AMPS tubular reaction continuous production device according to claim 9, characterized in that: A discharge cylinder (6) is fixedly connected to the end of the reaction pipe (1) opposite to the feed cylinder (9).

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