Reaction stirring shaft and vertical dynamic tubular reactor

Abstract

The invention discloses a reaction stirring shaft and a vertical dynamic tubular reactor. According to the reaction stirring shaft, rotating shaft sealing structures are formed at the upper end and the lower end of a shaft body, a transmission structure is formed above the rotating shaft sealing structure at the upper end, and the transmission structure is used for external driving; the first stirring structure is formed on the shaft body and is used for stirring a reaction material; the first receding structure is formed in the middle of the shaft body. The reaction stirring shaft disclosed by the invention has an anti-reflux function and can be used for fully stirring reactants. According to the vertical dynamic tubular reactor, the heat exchange area can be enlarged, so that the heat exchange efficiency is improved, and the temperature measurement is more accurate.

Description

Technical Field

[0001] The invention relates to the field of chemistry, in particular to a reaction stirring shaft and a vertical dynamic tubular reactor having the reaction stirring shaft. Background Art

[0002] The purpose of the dynamic tubular reactor is to replace the existing CSTR in the laboratory. CSTR connects multiple reaction bottles in series through PFA tubes. The depth of the tube insertion is related to the retention time of the reaction. Nitrogen is used as the power source. When the liquid level reaches the depth of the tube insertion, the liquid is pushed to the next bottle under the action of nitrogen until the final product bottle. CSTR is mainly aimed at reactions involving or generating solids to solve the problem of easy clogging with coils. The CSTR solution itself has certain safety issues. When the reaction produces severe gas, the bottle stopper will pop open instantly, causing chemical reagents to splash and posing a risk of injury.

[0003] The dynamic tubular reactor with the same specifications as CSTR in the prior art is very large, occupying about 3 / 4 of the size of the fume hood, so it is difficult to connect multiple devices in series, or multiple fume hoods need to be occupied to achieve the work of connecting multiple devices in series, which leads to the problem of low space utilization of the fume hood. The dynamic tubular reactor is mainly used for reactions involving or generating solids, which requires the equipment to be easy to disassemble and assemble. However, the disassembly of equipment on the market has high requirements for experimental personnel. The maintenance of a device takes about half a day or more. It is easy to cause leakage of the equipment due to improper operation. Some equipment even needs to be returned to the factory for maintenance. In this way, urgent projects are often terminated due to equipment problems, which is particularly unfriendly to experimental personnel.

[0004] In addition, dynamic tubular reactors also have to perform some reactions with relatively serious gas production, so accurate retention time must be solved. In the prior art, dynamic tubular reactors are all arranged horizontally. Horizontal arrangement of dynamic tubular reactors is prone to the problem of unreacted materials being pushed out of the reactor due to sudden gas production, thus failing to solve the retention time problem.

[0005] With the advancement of technology, vertical dynamic tubular reaction system has emerged. Vertical dynamic tubular reaction system is a reaction jacket arranged vertically, and materials and heat exchange medium are in the bottom and out the top. However, the problem brought by the vertical reactor is that the back mixing is relatively serious. When some reactions are seriously back mixed, by-products will be produced, which is also the result that the experimenters do not want to get. The vertical structure of the vertical dynamic tubular reaction system also brings new technical problems, that is, the vertical dynamic tubular reaction system is prone to form a large temperature difference between the top and the bottom, and it is easy to form a dead zone, thus affecting the experimental results. Summary of the invention

[0006] A series of simplified concepts are introduced in the Summary of the Invention, which are all simplifications of the prior art in the field, and will be further described in detail in the Detailed Description of the Invention. The Summary of the Invention of the present invention does not mean to attempt to define the key features and essential technical features of the claimed technical solution, nor does it mean to attempt to determine the scope of protection of the claimed technical solution.

[0007] The technical problem to be solved by the present invention is to provide a reaction stirring shaft with anti-backflow function and capable of fully stirring reactants, and a vertical dynamic tubular reactor with the reaction stirring shaft.

[0008] In order to solve the above technical problems, the present invention provides a reaction stirring shaft, comprising:

[0009] The shaft body 1 has a rotating shaft sealing structure 2 formed at both ends of the upper and lower ends, and a transmission structure 3 is formed above the upper end rotating shaft sealing structure 2, and the transmission structure 3 is used for external drive;

[0010] The first stirring structure 4 is formed on the shaft body 1 and is used to stir the reaction material;

[0011] A first yielding structure 5 is formed in the middle of the shaft body 1;

[0012] Preferably, the reaction stirring shaft is further improved, and the first stirring structure 4 is formed as stirring comb teeth arranged on the shaft body 1.

[0013] Preferably, the reaction stirring shaft is further improved, further comprising:

[0014] The second stirring structure 6 is formed on the shaft body 1 below the first stirring structure 4 and is used to push the reaction material upward.

[0015] Preferably, the reaction stirring shaft is further improved, and the second stirring structure 6 is formed as a spiral blade.

[0016] Preferably, the reaction stirring shaft is further improved, further comprising:

[0017] The third stirring structure 7 is located on the shaft body 1 above the second stirring structure 6 and is arranged at intervals in the second stirring structure 6 in the vertical direction, and is used to prevent the reaction material from flowing back upward.

[0018] Preferably, the reaction stirring shaft is further improved, and the third stirring structure 7 is formed as anti-fall baffles arranged at intervals.

[0019] In order to solve the above technical problems, the present invention provides a vertical dynamic tubular reactor, which has the reaction stirring shaft described in any one of the above items, and further includes:

[0020] A housing 8, which is used to provide a closed reaction space;

[0021] The reaction stirring shaft 9 has a shaft sealing structure 2 at the lower end thereof supported by a lower bearing 10 at the bottom of the housing 8, and a shaft sealing structure 2 at the upper end thereof supported by an upper bearing 11 at the top of the housing 8, and a transmission structure 3 passing through the top of the housing 8 to connect to an external drive;

[0022] A heat exchange interlayer 12, which is formed between the reaction stirring shaft 9 and the shell 8 and is located close to the inner wall of the shell 8, and is used to provide a temperature environment required for the reaction;

[0023] A heat-insulating layer 13, which is coated on the shell 8;

[0024] A reaction liquid inlet 14 is formed at the lower portion of the housing 8;

[0025] A product outlet 15 is formed at the upper portion of the housing 8;

[0026] The temperature monitoring point 16 is formed on the shell 8 and is aligned with the first relief structure 5, and is used to monitor the temperature of the closed reaction space.

[0027] Preferably, the vertical dynamic tubular reactor is further improved, the heat exchange interlayer 12 around the temperature monitoring point 16 is formed with a second yielding structure, and a gap is formed between the temperature monitoring point 16 and the heat exchange interlayer 12 around it.

[0028] The working principle of the reaction stirring shaft of the present invention is as follows:

[0029] The lower end of the shaft of the reaction stirring shaft of the present invention is welded with spiral blades, comb teeth are welded in the radial direction of the upper end, and anti-drop baffles are welded between the comb teeth of stage lengths. When there are solid particles or suspensions in the reaction liquid, when the lower end of the reaction liquid enters the reaction chamber, the spiral blades of the rotating shaft rotate at high speed to generate an upward force, pushing the material to the comb tooth area. The rapid rotation of the comb teeth makes the mixing effect of the two streams of material extremely good. Due to gravity, the liquid has a tendency to fall. At this time, the anti-drop baffle plays a role in preventing it from falling. The additional upward thrust of the spiral effectively solves the reaction that is more sensitive to back mixing. At the same time, the temperature monitoring point directly measures the temperature of the reaction liquid through the heat exchange layer, and the temperature measuring point is arranged in the middle part of the reaction chamber. The middle part is the flow area of ​​the reaction liquid, so the measured temperature is more accurate.

[0030] The reaction stirring shaft of the present invention effectively solves a type of reaction that is sensitive to backmixing through the design of the first stirring structure, the second stirring structure and the third stirring structure. The combination of the first stirring structure, the second stirring structure and the third stirring structure effectively solves the problem of shaft obstruction caused by material deposition without affecting the mixing effect.

[0031] It should be noted that the first stirring structure, the second stirring structure and the third stirring structure of the reaction stirring shaft of the present invention are preferably used in combination, and can also be used separately, the only difference is that the technical effects are slightly different.

[0032] Each structure of the vertical dynamic tubular reactor of the present invention can be set as a modular structure, so it is convenient to disassemble and assemble, and can be completed by ordinary experimenters. The vertical dynamic tubular reactor of the present invention is small in size, easy to operate, and has high-quality mass transfer and heat transfer effects, thereby greatly shortening the reaction time, and is very suitable for high-risk reactions with high mixing effect requirements, sensitivity to backmixing, large-scale gas production, and solid participation or generation.

[0033] The vertical dynamic tubular reactor of the present invention forms an annular reaction zone through structural design of the inner surface of the reaction chamber and the reaction stirring shaft. By arranging a thermal insulation layer and designing the heat exchange layer on the side close to the inner wall of the shell, since the radius on the side close to the inner wall of the shell is relatively large, the heat exchange area can be expanded to improve the heat exchange efficiency.

[0034] The vertical dynamic tubular reactor of the present invention is designed with two giving way structures, so that the temperature monitoring point is closer to the middle part of the shaft body and has a gap with the heat exchange interlayer, so that the temperature measurement is more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The drawings of the present invention are intended to illustrate the general characteristics of the methods, structures and / or materials used in specific exemplary embodiments of the present invention, and to supplement the description in the specification. However, the drawings of the present invention are schematic diagrams not drawn to scale, and thus may not accurately reflect the precise structure or performance characteristics of any given embodiment, and the drawings of the present invention should not be interpreted as limiting or restricting the range of values ​​or properties covered by the exemplary embodiments of the present invention. The present invention is further described in detail below in conjunction with the drawings and specific embodiments:

[0036] Figure 1 It is a schematic diagram of the overall structure of the reaction stirring shaft according to the first embodiment of the present invention.

[0037] Figure 2 It is a schematic diagram of the overall structure of the reaction stirring shaft according to the second embodiment of the present invention.

[0038] Figure 3 The overall structure of the reaction stirring shaft of the third embodiment of the present invention is shown in FIG. Figure 1 .

[0039] Figure 4 The overall structure of the reaction stirring shaft of the third embodiment of the present invention is shown in FIG. Figure 2 .

[0040] Figure 5 It is a schematic cross-sectional structure diagram of a vertical dynamic tubular reactor according to a fourth embodiment of the present invention.

[0041] Description of reference numerals:

[0042] Axis 1

[0043] Shaft sealing structure 2

[0044] Transmission structure 3

[0045] The first stirring structure 4

[0046] First yield structure 5

[0047] Second stirring structure 6

[0048] The third stirring structure 7

[0049] Shell 8

[0050] Reaction stirring shaft 9

[0051] Lower bearing 10

[0052] Upper bearing 11

[0053] Heat exchange interlayer 12

[0054] Insulation layer 13

[0055] Reaction liquid inlet 14

[0056] Product export 15

[0057] Temperature monitoring point 16

[0058] Heat exchange medium inlet 17

[0059] Heat exchange medium outlet 18

[0060] Second yielding structure 19. DETAILED DESCRIPTION

[0061] The following is an explanation of the embodiments of the present invention by specific specific embodiments, and those skilled in the art can fully understand other advantages and technical effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through different specific embodiments, and the details in this specification can also be applied based on different viewpoints, and various modifications or changes can be made without deviating from the general design concept of the invention. It should be noted that, in the absence of conflict, the following embodiments and the features in the embodiments can be combined with each other. The following exemplary embodiments of the present invention can be implemented in a variety of different forms and should not be interpreted as being limited to the specific embodiments described herein. It should be understood that these embodiments are provided to make the disclosure of the present invention thorough and complete, and to fully convey the technical solutions of these exemplary specific embodiments to those skilled in the art. It should be understood that when an element is referred to as "connected" or "coupled" to another element, the element can be directly connected or coupled to another element, or there can be an intermediate element. The difference is that when an element is referred to as "directly connected" or "directly coupled" to another element, there is no intermediate element. In all figures, the same reference numerals always represent the same element. As used herein, the term "and / or" includes any combination and all combinations of one or more related listed items.

[0062] First embodiment;

[0063] refer to Figure 1 As shown, the present invention provides a reaction stirring shaft, comprising:

[0064] The shaft body 1 has a rotating shaft sealing structure 2 formed at both ends of the upper and lower ends, and a transmission structure 3 is formed above the upper end rotating shaft sealing structure 2, and the transmission structure 3 is used for external drive;

[0065] The first stirring structure 4 is formed on the shaft body 1 and is used to stir the reaction material;

[0066] A first yielding structure 5 is formed in the middle of the shaft body 1;

[0067] Preferably, the first stirring structure 4 is formed as stirring comb teeth arranged on the shaft body 1 .

[0068] In addition, it should also be understood that, although the terms "first", "second", etc. may be used here to describe different elements, components, regions, layers and / or parts, these elements, components, regions, layers and / or parts should not be limited by these terms. These terms are only used to distinguish an element, component, region, layer or part from another element, component, region, layer or part. Therefore, without departing from the teachings of exemplary embodiments of the present invention, the first element, component, region, layer or part discussed below may also be referred to as the second element, component, region, layer or part.

[0069] Second embodiment;

[0070] refer to Figure 2 As shown, the present invention provides a reaction stirring shaft, which is a further improvement on the basis of the above-mentioned first embodiment, and the same parts are not repeated here, and further includes:

[0071] The second stirring structure 6 is formed on the shaft body 1 below the first stirring structure 4 and is used to push the reaction material upwards;

[0072] Preferably, the second stirring structure 6 is formed as a spiral blade.

[0073] Third embodiment;

[0074] The present invention provides a reaction stirring shaft, which is a further improvement on the basis of the first embodiment or the second embodiment, and the same parts are not repeated here, and further includes:

[0075] The third stirring structure 7 is located on the shaft body 1 above the second stirring structure 6 and is arranged at intervals in the second stirring structure 6 in the vertical direction, and is used to prevent the reaction material from flowing back upward.

[0076] A third stirring structure 7 is added on the basis of the first embodiment. Figure 3 As shown;

[0077] A third stirring structure 7 is added on the basis of the second embodiment. Figure 4 As shown;

[0078] Preferably, in the third embodiment, the first stirring structure 4 is formed as stirring comb teeth arranged on the shaft body 1;

[0079] The second stirring structure 6 is formed as a spiral blade;

[0080] The third stirring structure 7 is formed as anti-fall baffles arranged at intervals.

[0081] Fourth embodiment;

[0082] refer to Figure 5 As shown, the present invention provides a vertical dynamic tubular reactor, which has the reaction stirring shaft described in any one of the first to third embodiments above, and the same parts are not repeated here, and further includes:

[0083] A housing 8, which is used to provide a closed reaction space;

[0084] The reaction stirring shaft 9, the shaft sealing structure 2 at the lower end thereof is carried in the lower bearing 10 at the bottom of the housing 8, the shaft sealing structure 2 at the upper end thereof is carried in the upper bearing 11 at the top of the housing 8, and the transmission structure 3 thereof passes through the top of the housing 8 to connect with an external drive; for example, the transmission structure 3 is meshedly connected with an external drive gear;

[0085] A heat exchange interlayer 12, which is formed between the reaction stirring shaft 9 and the shell 8 and is located close to the inner wall of the shell 8, and is used to provide a temperature environment required for the reaction;

[0086] Preferably, the heat exchange medium inlet 17 is formed at the lower part of the shell 8, and the heat exchange medium outlet 18 is formed at the upper part of the shell 8;

[0087] A heat-insulating layer 13, which is coated on the shell 8;

[0088] A reaction liquid inlet 14 is formed at the lower portion of the housing 8;

[0089] A product outlet 15 is formed at the upper portion of the housing 8;

[0090] A temperature monitoring point 16 is formed on the housing 8 and is aligned with the first giving way structure 5, and is used to monitor the temperature of the closed reaction space;

[0091] The heat exchange interlayer 12 around the temperature monitoring point 16 is formed with a second giving way structure 19 , and a gap is formed between the temperature monitoring point 16 and the heat exchange interlayer 12 around it.

[0092] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. It will also be understood that, unless expressly defined herein, terms such as those defined in general dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant art, and not interpreted in an ideal or overly formal sense.

[0093] The present invention has been described in detail above through specific implementation modes and embodiments, but these do not constitute limitations of the present invention. Without departing from the principles of the present invention, those skilled in the art may also make many variations and improvements, which should also be regarded as the protection scope of the present invention.

Claims

1. A reaction stirring shaft, characterized in that: include: The shaft body (1) has a rotating shaft sealing structure (2) formed at both ends of the shaft body (1), and a transmission structure (3) is formed above the rotating shaft sealing structure (2) at the upper end of the shaft body (1), and the transmission structure (3) is used for external driving; A first stirring structure (4) is formed on the shaft body (1) and is used to stir the reaction material; The first yielding structure (5) is formed in the middle of the shaft body (1).

2. The reaction stirring shaft according to claim 1, characterized in that: Also includes: The second stirring structure (6) is formed on the shaft body (1) below the first stirring structure (4) and is used to push the reaction material upwards.

3. The reaction stirring shaft according to claim 2, characterized in that: The first stirring structure (4) is formed as stirring comb teeth arranged on the shaft body (1); The second stirring structure (6) is formed as a spiral blade.

4. The reaction stirring shaft according to claim 1, characterized in that: Also includes: The third stirring structure (7) is located on the shaft (1) above the second stirring structure (6) and is arranged at intervals in the second stirring structure (6) in the vertical direction, and is used to prevent the reaction material from flowing upward.

5. The reaction stirring shaft according to claim 4, characterized in that: The third stirring structure (7) is formed as anti-fall baffles arranged at intervals.

6. The reaction stirring shaft according to claim 2, characterized in that: Also includes: The third stirring structure (7) is located on the shaft (1) above the second stirring structure (6) and is arranged at intervals in the second stirring structure (6) in the vertical direction, and is used to prevent the reaction material from flowing upward.

7. The reaction stirring shaft according to claim 6, characterized in that: The third stirring structure (7) is formed as anti-fall baffles arranged at intervals.

8. A vertical dynamic tubular reactor, comprising a reaction stirring shaft according to any one of claims 1 to 7, characterized in that: Also includes: A housing (8) for providing a closed reaction space; A reaction stirring shaft (9), wherein the shaft sealing structure (2) at the lower end thereof is carried in a lower bearing (10) at the bottom of the housing (8), and the shaft sealing structure (2) at the upper end thereof is carried in an upper bearing (11) at the top of the housing (8), and the transmission structure (3) thereof passes through the top of the housing (8) to connect to an external drive; A heat exchange interlayer (12), which is formed between the reaction stirring shaft (9) and the shell (8) and is located close to the inner wall of the shell (8), and is used to provide a temperature environment required for the reaction; A heat-insulating layer (13) covering the shell (8); A reaction liquid inlet (14) is formed at the lower portion of the housing (8); A product outlet (15) is formed at the upper portion of the housing (8); A temperature monitoring point (16) is formed on the shell (8) and is aligned with the first relief structure (5) for monitoring the temperature of the closed reaction space.

9. The vertical dynamic tubular reactor according to claim 8, characterized in that: The heat exchange interlayer (12) around the temperature monitoring point (16) is formed with a second yielding structure, and a gap is formed between the temperature monitoring point (16) and the heat exchange interlayer (12) around it.

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