A stirring shaft and a tubular reactor

Abstract

Embodiments of the present invention provide a stirring shaft and a tubular reactor, relating to the technical field of reaction equipment. The stirring shaft provided by the embodiments of the present invention includes a shaft body. The shaft body includes an outer casing and an inner casing disposed within the outer casing. The inner casing is provided with a first chamber, and a second chamber and a third chamber are formed between the outer casing and the inner casing. The outer side of the outer casing is used for installing a heat exchange member, and the heat exchange member has a heat exchange channel communicating the second chamber and the third chamber. The second chamber communicates with the first chamber through a communication hole provided in the inner casing. The first chamber communicates with the outside through a first opening, and the third chamber communicates with the outside through a second opening, so that a heat exchange medium can enter and exit the shaft body, and heat exchange of the stirred material can be achieved during the stirring of the stirring shaft, thereby improving the heat exchange effect and meeting the heat exchange requirements of the stirred material.

Description

Technical Field

[0001] The present invention relates to the technical field of reaction equipment, and in particular, to a stirring shaft and a tubular reactor. Background Art

[0002] When a device stirs materials, it is often necessary to perform heat exchange while stirring. For example, in a chemical reaction device, it is not only necessary to stir the reactants to make the reactants mix evenly, but also because some reactants will release a large amount of heat during the reaction. If the generated heat cannot be taken away in time, it may lead to consequences such as out-of-control reaction or even explosion.

[0003] In existing stirring equipment, heat exchange and stirring are often realized by different devices. For example, they are realized by a heat exchange module arranged outside the device and a stirring shaft inside the device respectively. However, this structure often makes it difficult to exchange the heat of the materials inside the device, and the heat exchange efficiency is low. Summary of the Invention

[0004] The objectives of the present invention include, for example, providing a stirring shaft having a heat exchange structure, which can realize heat exchange with materials during the stirring process, meet the heat exchange requirements of the materials, and improve the heat exchange efficiency.

[0005] The objectives of the present invention also include providing a tubular reactor, which can realize heat exchange of materials inside, meet the heat exchange requirements of the materials, and improve the heat exchange efficiency.

[0006] The embodiments of the present invention can be implemented as follows:

[0007] The embodiments of the present invention provide a stirring shaft, which includes a shaft body. The shaft body includes an outer shell and an inner shell arranged inside the outer shell; a first chamber and a first opening communicating with the first chamber are arranged inside the inner shell;

[0008] A second chamber and a third chamber are formed between the inner shell and the outer shell. The outer side of the outer shell is used to install a heat exchange member having a heat exchange channel. The second chamber communicates with the third chamber through the heat exchange channel; a communication hole is opened on the inner shell, and the first chamber communicates with the second chamber through the communication hole; the outer shell is also provided with a second opening communicating with the third chamber.

[0009] Optionally, the above-mentioned shaft body further includes a partition arranged between the inner shell and the outer shell. The partition is used to divide the area between the inner shell and the outer shell into a second chamber and a third chamber;

[0010] Preferably, the number of partitions is at least one. The partitions are fixedly connected to the inner wall of the outer shell, and each partition forms a third chamber with the inner wall;

[0011] Preferably, the partition plate includes a first radial partition plate and a second radial partition plate. The first radial partition plate and the second radial partition plate are arranged at intervals along the circumferential direction of the outer housing. A third chamber is formed between the first radial partition plate and the second radial partition plate of the same partition plate.

[0012] Preferably, the partition plate further includes a circumferential partition plate. The two ends of the circumferential partition plate are respectively fixedly connected to the first radial partition plate and the second radial partition plate. The circumferential partition plate is arranged at an interval from the outer housing, and a third chamber is formed between the circumferential partition plate and the outer housing. The circumferential partition plate is arranged at an interval from the inner housing, so that the third chamber is arranged at an interval from the inner housing.

[0013] Preferably, the shaft body further includes a closing plate arranged between the inner housing and the outer housing. The closing plate is used to close the second chamber.

[0014] Preferably, the closing plate is sleeved outside the inner housing, and a sealing member is arranged between the inner housing and the closing plate.

[0015] Preferably, a shoulder is arranged outside the inner housing. The closing plate is sleeved on the shoulder, and a sealing member is arranged between the shoulder and the closing plate.

[0016] Optionally, the above-mentioned stirring shaft further includes a heat exchange member fixedly connected to the outside of the outer housing. A heat exchange channel is arranged inside the heat exchange member, and the two ends of the heat exchange channel are respectively communicated with the second chamber and the third chamber.

[0017] Preferably, the heat exchange member is a stirring blade.

[0018] Optionally, a flow disturbing structure is further arranged in the heat exchange channel of the above-mentioned heat exchange member.

[0019] Preferably, the flow disturbing structure includes a flow disturbing member arranged in the heat exchange channel.

[0020] Preferably, the flow disturbing structure includes grooves or protrusions arranged on the wall surface of the heat exchange channel.

[0021] Optionally, in the cross-section of the above-mentioned outer housing, the number of heat exchange members arranged along the circumferential direction of the outer housing is m, and the sum of the numbers of the second chamber and the third chamber is n.

[0022] When m is an even number, m ≤ (n - 1) × 2; when m is an odd number, m ≤ (n - 1) × 2 - 1.

[0023] Preferably, when m is an even number, m = (n - 1) × 2; when m is an odd number, m = (n - 1) × 2 - 1.

[0024] Preferably, the number of heat exchange members is an even number.

[0025] Preferably, the number of heat exchange members is 4, 6 or 8.

[0026] Optionally, the tangent of the surface of the stirring blade forms an angle with the rotation axis of the shaft body;

[0027] Preferably, the stirring blade is used to make the stirred material tend to move towards the material outlet;

[0028] Preferably, the angle between the tangent of the surface of the heat exchange member and the rotation axis of the shaft body is β, 0° < β ≤ 45°;

[0029] Preferably, the surface of the heat exchange member is a plane, and the plane forms an angle with the rotation axis of the shaft body;

[0030] Preferably, the angle between the connection line between the inlet and the outlet of the heat exchange channel and the axis of the shaft body is α, 0° < α ≤ 45°.

[0031] Optionally, the above-mentioned shaft body further includes a rotary joint, and both the inner housing and the outer housing are rotatably connected to the rotary joint; the first opening and the second opening are both provided on the rotary joint;

[0032] Preferably, the communication hole and the first opening are respectively located at both ends of the inner housing;

[0033] Preferably, the communication hole is located at the end of the inner housing away from the first opening.

[0034] Optionally, the number of the above-mentioned communication holes is multiple, and the multiple communication holes are provided on the peripheral wall of the inner housing;

[0035] Preferably, the sum of the apertures of the multiple communication holes is greater than or equal to the radial dimension of the first chamber.

[0036] Optionally, the outer side of the above-mentioned outer housing has a heat exchange area for installing the heat exchange member; along the axial direction of the shaft body, the heat exchange area is located between the second opening and the communication hole.

[0037] The embodiment of the present invention also provides a tubular reactor. The tubular reactor includes any one of the above-mentioned stirring shafts.

[0038] The beneficial effects of the stirring shaft and the tubular reactor in the embodiment of the present invention include, for example:

[0039] An embodiment of the present invention provides a stirring shaft, which includes a shaft body. The shaft body includes an outer housing and an inner housing disposed within the outer housing. The inner housing is provided with a first chamber, and a second chamber and a third chamber are formed between the outer housing and the inner housing. The outer side of the outer housing is used for installing a heat exchanger, and the heat exchanger has a heat exchange channel that communicates the second chamber and the third chamber. The second chamber is communicated with the first chamber through a communication hole provided on the inner housing. The first chamber communicates with the outside through a first opening, and the third chamber communicates with the outside through a second opening, so that a heat exchange medium can enter and exit the shaft body, and heat exchange of the stirred material can be achieved during the stirring process of the stirring shaft, thereby improving the heat exchange effect and meeting the heat exchange requirements of the stirred material.

[0040] An embodiment of the present invention further provides a tubular reactor, which includes any one of the above stirring shafts, and thus also has the beneficial effects of being able to perform heat exchange inside the stirred material, meeting the heat exchange requirements of the stirred material, and having a good heat exchange effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can also be obtained based on these drawings without creative efforts.

[0042] Figure 1 It is a schematic cross-sectional structure diagram of the stirring shaft provided by the embodiment of the present invention;

[0043] Figure 2 It is a schematic structural diagram of the outer housing of the stirring shaft provided by the embodiment of the present invention;

[0044] Figure 3 For Figure 1 the schematic cross-sectional structure diagram at section III-III in

[0045] Figure 4 It is a schematic cross-sectional structure diagram of the second stirring shaft provided by the embodiment of the present invention;

[0046] Figure 5 For Figure 3 the schematic cross-sectional structure diagram at section V-V in

[0047] Figure 6 It is a schematic cross-sectional structure diagram of another circumferential partition of the stirring shaft provided by this embodiment;

[0048] Figure 7 It is a schematic cross-sectional structure diagram of the third stirring shaft provided by the embodiment of the present invention;

[0049] Figure 8Schematic structural diagram of the stirring blade in the stirring shaft provided by the embodiment of the present invention;

[0050] Figure 9 Schematic cross-sectional structural diagram of the fourth stirring shaft provided by the embodiment of the present invention;

[0051] Figure 10 For Figure 1 Enlarged view of the local structure at X in;

[0052] Figure 11 For Figure 1 Schematic cross-sectional structural diagram at XI-XI in;

[0053] Figure 12 Schematic cross-sectional structural diagram of the tubular reactor provided by the embodiment of the present invention from the first perspective;

[0054] Figure 13 Schematic cross-sectional structural diagram of the tubular reactor provided by the embodiment of the present invention from the second perspective.

[0055] Icon: 100 - Stirring shaft; 110 - Inner shell; 111 - First chamber; 112 - Communication hole; 113 - Shoulder; 120 - Outer shell; 121 - Second chamber; 122 - Third chamber; 130 - Stirring blade; 131 - Heat exchange channel; 132 - Inlet; 133 - Outlet; 134 - Turbulence generating member; 140 - Partition; 141 - First radial partition; 142 - Second radial partition; 143 - Circumferential partition; 150 - Closing plate; 151 - Sealing member; 160 - Rotary joint; 161 - First opening; 162 - Second opening; 200 - Tubular reactor; 210 - Reaction shell; 220 - Feed pipe. Detailed implementation manners

[0056] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Usually, the components of the embodiments of the present invention described and illustrated herein can be arranged and designed in various different configurations.

[0057] Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0058] It should be noted that like reference numerals and letters refer to like items in the following figures. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0059] In the description of the present invention, it should be noted that if terms such as "upper", "lower", "inner", "outer", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the figures, or the orientation or positional relationship in which the product of the present invention is usually placed during use. This is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0060] In addition, terms such as "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0061] It should be noted that, without conflict, the features in the embodiments of the present invention can be combined with each other.

[0062] Figure 1 This is a schematic cross-sectional structure diagram of the stirring shaft 100 provided in this embodiment. Please refer to Figure 1 In this embodiment, a stirring shaft 100 is provided, which includes a shaft body. The shaft body includes an outer housing 120 and an inner housing 110 disposed inside the outer housing 120. The inner housing 110 is provided with a first chamber 111, and a second chamber 121 and a third chamber 122 are formed between the outer housing 120 and the inner housing 110. The outside of the outer housing 120 is used to install a heat exchange member, and the heat exchange member has a heat exchange channel 131 that communicates the second chamber 121 and the third chamber 122. The second chamber 121 is communicated with the first chamber 111 through a communication hole 112 provided on the inner housing 110. The first chamber 111 communicates with the outside through a first opening 161, and the third chamber 122 communicates with the outside through a second opening 162, so that the heat exchange medium can enter and exit the shaft body, and heat exchange of the stirred material is realized during the stirring process of the stirring shaft 100, thereby improving the heat exchange effect and meeting the heat exchange requirements of the stirred material.

[0063] The following further describes the stirring shaft 100 provided in this embodiment:

[0064] In this embodiment, the stirring shaft 100 includes a shaft body. The shaft body includes an outer housing 120 and an inner housing 110 disposed within the outer housing 120. Specifically, the outer housing 120 is a tubular structure having a cavity therein, and the inner housing 110 is cylindrical and disposed within the cavity of the outer housing 120, coaxially with the outer housing 120, thereby forming a cylindrical shaft body. During the stirring process, the shaft body rotates about its own axis. The outer diameter of the inner housing 110 is smaller than the inner diameter of the outer housing 120, so an annular cavity is formed between the inner housing 110 and the outer housing 120. The inner housing 110 is a tubular member having a first chamber 111 therein, and a communication hole 112 is provided in the inner housing 110 to communicate the first chamber 111 with the annular cavity formed between the inner housing 110 and the outer housing 120. The heat exchange medium entering the first chamber 111 can enter the annular cavity through the communication hole 112, or the heat exchange medium entering the annular cavity can enter the first chamber 111 through the communication hole 112.

[0065] Figure 2 FIG. is a schematic structural view of the outer housing 120 of the stirring shaft 100 provided in this embodiment. Please refer to Figure 1 and Figure 2 , the shaft body further includes a partition 140 disposed within the annular cavity. The annular cavity is divided into a second chamber 121 and a third chamber 122 by the partition 140. The communication hole 112 provided in the inner housing 110 communicates the first chamber 111 and the second chamber 121. A heat exchange member is installed on the outer wall of the outer housing 120. The heat exchange member has a heat exchange channel 131. An inlet 132 and an outlet 133 communicating with the heat exchange channel 131 are provided on the outer housing 120. The inlet 132 communicates with the second chamber 121, and the outlet 133 communicates with the third chamber 122, so that the second chamber 121 and the third chamber 122 are communicated through the heat exchange channel 131. The outer housing 120 has a second opening 162 communicating the third chamber 122 with the outside. During use, when the heat exchange medium enters the shaft body from the first opening 161, it sequentially passes through the first chamber 111, the second chamber 121, and the third chamber 122, and finally leaves the shaft body from the second opening 162. Alternatively, the heat exchange medium can also enter the shaft body from the second opening 162 and then leave the shaft body from the first opening 161.

[0066] Figure 3 For Figure 1 the schematic cross-sectional structure at position III-III in. Please refer to Figure 3, the number of the partition plates 140 is at least one. The partition plates 140 are fixedly connected to the inner wall of the outer shell 120, so as to form a third chamber 122 between the partition plates 140 and the outer shell 120. The remaining part of the annular cavity between the outer shell 120 and the inner shell 110 is the second chamber 121. Specifically, in this embodiment, the number of the partition plates 140 is two, so as to form two third chambers 122. The two partition plates 140 are arranged at intervals along the circumferential direction of the outer shell 120 and are respectively fixedly connected to the inner wall of the outer shell 120, so as to divide the inner wall of the outer shell 120 into four circumferentially distributed regions, namely a first region, a second region, a third region and a fourth region. The first region and the third region are respectively used to form two third chambers 122, and the second region and the fourth region are respectively used to form the second chamber 121.

[0067] It should be noted that the number of the partition plates 140 is not specifically limited here. It can be understood that in other embodiments, the number of the partition plates 140 can also be specifically set according to requirements. For example, the number of the partition plates 140 can be set to one, so as to divide the annular cavity between the inner shell 110 and the outer shell 120 into a second chamber 121 and a third chamber 122 (as Figure 4 shown).

[0068] Optionally, each partition plate 140 includes two radial partition plates 140, and the two radial partition plates 140 are respectively a first radial partition plate 141 and a second radial partition plate 142. The first radial partition plate 141 and the second radial partition plate 142 are arranged at intervals along the circumferential direction of the outer shell 120, and the radially outer ends of the first radial partition plate 141 and the second radial partition plate 142 are both fixedly connected to the inner wall of the outer shell 120. In this way, a third chamber 122 is formed between the first radial partition plate 141 and the second radial partition plate 142 of the same partition plate 140. Further, the partition plate 140 further includes a circumferential partition plate 143. The circumferential partition plate 143 is arranged at an interval from the outer shell 120, and both ends of the circumferential partition plate 143 are fixedly connected to the radially outer ends of the first radial partition plate 141 and the second radial partition plate 142 respectively, so as to jointly enclose the third chamber 122 by the first radial partition plate 141, the circumferential partition plate 143, the second radial partition plate 142 and the inner wall of the outer shell 120. The circumferential partition plate 143 is arranged at an interval from the inner shell 110, so that the formed third chamber 122 is arranged at an interval from the inner shell 110, and the processing process is more convenient. Optionally, the circumferential partition plate 143 and the first radial partition plate 141 and the second radial partition plate 142 are fixedly formed into one body by welding. It can be understood that in other embodiments, the circumferential partition plate 143 and the first radial partition plate 141 and the second radial partition plate 142 can also be arranged to be integrally formed according to requirements.

[0069] Figure 5 For Figure 3 the schematic cross-sectional structure diagram at the position of V-V in. Please refer toFigure 3 and Figure 5 , optionally, the cross-section of the circumferential partition 143 is an arc with the same center as the outer housing 120. Optionally, the first radial partition 141 and the second radial partition 142 are elongated along the axial direction of the shaft body, so that the formed third chamber 122 extends axially. It can be understood that in other embodiments, the extension direction of the partition 140 can also be set according to requirements, so that the extension direction of the formed third chamber 122 meets the requirements. For example, the partition 140 can be set to extend spirally around the axis of the shaft body, or extend in an S shape, etc. Optionally, along the axial direction of the shaft body, the circumferential partition 143 extends linearly. It can be understood that in other embodiments, the shape of the circumferential partition 143 can also be set according to requirements, such as set to an S shape (as shown in Figure 6 ).

[0070] It should be noted that the specific structure and shape of the partition 140 are not limited here. It can be understood that in other embodiments, the shape of the partition 140 can also be specifically set according to requirements. For example, the partition 140 can be set as a curved surface with a bending direction opposite to that of the inner wall surface of the outer housing 120, so that a third chamber 122 is formed between the partition 140 fixedly connected to the outer housing 120 and the outer housing 120; or the partition 140 can be set to only include the first radial partition 141 and the second radial partition 142 arranged at intervals in the circumferential direction. By fixedly connecting the radially inner ends of the first radial partition 141 and the second radial partition 142 to the inner housing 110, a third chamber 122 is formed (as shown in Figure 7 ). At this time, the position of the communication hole 112 corresponds to the second chamber 121, so that the first chamber 111 is communicated with the second chamber 121, or the communication hole 112 communicates the first chamber 111 with the second chamber 121 and the first chamber 111 with the third chamber 122.

[0071] Please refer to Figure 1 and Figure 3, the stirring shaft 100 further includes a heat exchange member installed on the outer wall of the outer housing 120. In this embodiment, the heat exchange member is the stirring blade 130 of the stirring shaft 100. A heat exchange channel 131 is provided inside the stirring blade 130. The inlet 132 of the heat exchange channel 131 communicates with the second chamber 121, and the outlet 133 of the heat exchange channel 131 communicates with the third chamber 122. During the flow of the heat exchange medium in the shaft body, it needs to flow through the heat exchange channel 131 between the second chamber 121 and the third chamber 122, which helps to improve the heat exchange efficiency. Preferably, the tangent of the stirring blade 130 forms an angle with the axis of the shaft body, so that during the stirring process, the stirred material interacting with the stirring blade 130 has a tendency to move towards the material outlet under the action of the stirring blade 130. It should be noted that in the description of this embodiment, the angle is greater than 0° and less than 90°. Preferably, the angle between the tangent of the stirring blade 130 and the axis of the shaft body is β, 0° < β ≤ 45°. When 0° < β ≤ 45°, the larger the value of β, the better the heat exchange effect of the stirring blade 130, and the greater the pushing force on the material, but the greater the power consumed by the motor. Therefore, the angle between the tangent of the stirring blade 130 and the axis of the shaft body can be specifically set between 0 - 45° according to requirements.

[0072] For the convenience of processing, the stirring blade 130 is set as a plane, and this plane forms an angle with the axis of the shaft body. The outlet 133 and the inlet 132 of the heat exchange channel 131 are arranged at intervals along the extending direction of the stirring blade 130. Therefore, the angle α between the connection line between the outlet 133 and the inlet 132 of the heat exchange channel 131 and the axis of the outer housing 120 is the angle between the plane of the stirring blade 130 and the axis of the shaft body, 0° < α ≤ 45° (as Figure 2 shown).

[0073] Figure 8 is the structural schematic diagram of the stirring blade 130 in the stirring shaft 100 provided in this embodiment. Please refer to Figure 8 , the heat exchange channel 131 inside the stirring blade 130 is set as a U shape, and the two free ends of this U shape are respectively the inlet 132 and the outlet 133 of the heat exchange channel 131, ensuring the heat exchange efficiency of the stirring blade 130. It can be understood that in other embodiments, the shape of the heat exchange channel 131 can also be specifically set according to requirements. To improve the heat exchange efficiency of the stirring blade 130, further, a flow disturbance structure is provided inside the heat exchange channel 131 of the stirring blade 130. Specifically, the flow disturbance structure includes a plurality of flow disturbance members 134 provided inside the heat exchange channel 131. By setting the flow disturbance members 134 to disturb the flow of the heat exchange medium, the purpose of reducing laminar flow and increasing turbulent flow is achieved.

[0074] It should be noted that the spoiler structure is not specifically limited here. It can be understood that in other embodiments, the spoiler structure can also be set as grooves or protrusions on the inner wall of the heat exchange channel 131 according to requirements.

[0075] Further, in the cross-section of the outer housing 120, the number of stirring blades 130 arranged along the circumferential direction of the outer housing 120 is m, and the sum of the numbers of the second chamber 121 and the third chamber 122 is n. When m is an even number, m ≤ (n - 1) × 2; when m is an odd number, m ≤ (n - 1) × 2 - 1. Preferably, when m is an even number, m = (n - 1) × 2. At this time, the second chamber 121 and the third chamber 122 located on both sides of the radial partition 140 can be connected through the heat exchange channels 131 of at least one stirring blade 130, and the utilization rate of the partition 140 is higher. When m is an odd number, m = (n - 1) × 2 - 1. At this time, except for one radial partition 140, the second chamber 121 and the third chamber 122 on both sides of the remaining radial partitions 140 can be connected through the heat exchange channels 131 of at least one stirring blade 130 (as Figure 9 shown). Preferably, the number of m is an even number, and at this time, the utilization rate of the partition 140 is higher. Preferably, the number of m is 4, 6 or 8.

[0076] Please refer to Figure 1 , in this embodiment, the shaft body further includes a rotary joint 160. Both the inner housing 110 and the outer housing 120 are rotatably connected to the rotary joint 160. During the rotation of the shaft body, the inner housing 110 and the outer housing 120 rotate synchronously. Both the first opening 161 and the second opening 162 are formed on the rotary joint 160. In this way, only one end of the shaft body needs to be set as the rotary joint 160, and there is more space at the other end of the shaft body for design according to requirements. At the same time, the sealing structure at the end of the shaft body away from the rotary joint 160 can be omitted, the leakage points can be reduced, and when applied to a tubular reactor, the structural design at one end of the tubular reactor is not restricted by the rotating shaft. It can be understood that in other embodiments, the first opening 161 and the second opening 162 can also be set at both ends of the shaft body according to requirements.

[0077] Optionally, the communication holes 112 are formed on the circumferential surface of the inner housing 110, and the communication holes 112 and the first opening 161 are respectively located at two ends of the inner housing 110, which helps to extend the residence time of the heat exchange medium in the shaft body. Preferably, the communication holes 112 are located at the end of the inner housing 110 away from the first opening 161. Preferably, the number of the communication holes 112 is plural, and the plural communication holes 112 are all formed on the peripheral wall of the inner housing 110. Preferably, the sum of the pore diameters of the plural communication holes 112 is greater than or equal to the radial dimension of the first chamber 111, so that the flow area formed by the plural communication holes 112 is greater than the cross-sectional area of the first chamber 111, thereby reducing the influence caused by the communication holes 112 during the flow of the heat exchange medium between the first chamber 111 and the second chamber 121. Moreover, since the first opening 161 and the second opening 162 are located at one end of the shaft body, and the communication holes 112 are located at the other end of the shaft body, when the heat exchange medium is introduced into the shaft body from the first opening 161, the heat exchange medium is first introduced to the tail end of the first chamber 111, and then enters the second chamber 121 through the communication holes 112. When the heat exchange medium entering the second chamber 121 enters the third chamber 122 through the heat exchange channels 131 in the stirring blades 130, for the stirring blades 130 near the communication holes 112, the inflow pressure of the heat exchange medium is large, and the return resistance is also large. For the stirring blades 130 near the second opening 162, the inflow pressure of the heat exchange medium is small, and the return resistance is also small. Therefore, there will be no problem of short-circuit backflow in the distribution of the heat exchange medium, and the heat exchange effect is better. Preferably, the portion of the outer peripheral surface of the outer housing 120 for mounting the stirring blades 130 is a heat exchange area, and along the axial direction of the shaft body, the heat exchange area is located between the second opening 162 and the communication holes 112, so as to ensure that each stirring blade 130 can bring a better heat exchange effect.

[0078] Figure 10 is Figure 1 the enlarged view of the partial structure at position Ⅹ in Figure 11 is Figure 1 the schematic cross-sectional structure at position Ⅺ-Ⅺ in. Please refer to Figure 1 、 Figure 10 and Figure 11, in this embodiment, the shaft body further includes a closing plate 150 disposed between the inner housing 110 and the outer housing 120. The outer shape of the closing plate 150 matches the cross-section of the second chamber 121, so as to close the end of the second chamber 121 along the axial direction of the shaft body. Thus, the heat exchange medium entering the shaft body can flow in the order of the first chamber 111, the second chamber 121, the heat exchange channel 131, and the third chamber 122, or in the order of the third chamber 122, the heat exchange channel 131, the second chamber 121, and the first chamber 111. Optionally, the radially outer end of the closing plate 150 is fixedly connected to the partition plate 140 and the outer housing 120 by welding, so as to ensure the sealing effect between the closing plate 150, the partition plate 140, and the outer housing 120.

[0079] Optionally, the closing plate 150 is provided with a connection hole, and the inner housing 110 passes through the connection hole. A seal 151 is provided between the closing plate 150 and the inner housing 110 to ensure the sealing effect between the sealing plate and the inner housing 110. Specifically, a shoulder 113 is further provided outside the inner housing 110. The shoulder 113 is formed by the outer peripheral surface of the inner housing 110 protruding radially outward. The size of the connection hole of the closing plate 150 matches the radial size of the shoulder 113. The closing plate 150 is sleeved at the shoulder 113, and the sealing is ensured by providing a seal 151 between the shoulder 113 and the closing plate 150. At the same time, by providing the shoulder 113 and the seal 151, the precision requirements for processing and assembly can be reduced. Optionally, since the inner housing 110 and the outer housing 120 rotate synchronously when the stirring shaft 100 provided in this embodiment rotates, the seal between the closing plate 150 and the inner housing 110 is a static seal. The seal 151 provided between the closing plate 150 and the inner housing 110 is an O-ring. Using an O-ring saves costs and is convenient for disassembly and assembly.

[0080] According to a stirring shaft 100 provided in this embodiment, the working principle of the stirring shaft 100 is as follows:

[0081] During use, the heat exchange medium enters the shaft body through the first opening 161 on the stirring shaft 100 and flows out through the second opening 162 after heat exchange, so as to exchange heat with the material inside the stirred material through the stirring shaft 100, thereby improving the heat exchange effect and further meeting the heat exchange requirements of the material. The heat exchange medium entering the shaft body first flows from the front end to the tail end of the shaft body through the first chamber 111, enters the second chamber 121 through the communication hole 112 provided on the inner housing 110, and flows from the tail end to the front end of the shaft body along the second chamber 121. At the same time, during the flow process, part of the heat exchange medium flows into the heat exchange channel 131 in the stirring blade 130, flows into the third chamber 122 through the heat exchange channel 131 and then continues to flow to the front end of the shaft body, and finally flows out of the shaft body through the second opening 162. Or the heat exchange medium can also be introduced through the second opening 162 and finally flow out through the first opening 161.

[0082] The stirring shaft 100 provided in this embodiment has at least the following advantages:

[0083] The stirring shaft 100 provided by the embodiment of the present invention has a heat exchange structure, and by introducing a heat exchange medium into the stirring shaft 100, heat can be exchanged from the inside of the material during the stirring process, improving the heat exchange efficiency and meeting the heat exchange requirements of the material. Moreover, the stirring shaft 100 can increase the relative velocity of the heat exchange medium, so it can increase the heat transfer coefficient, have a higher heat exchange efficiency, and better temperature control effect. By specifically setting the positions of the first opening 161, the second opening 162, and the communication hole 112, the problem of short-circuit backflow of the stirring blade 130 is avoided, so that each stirring blade 130 can play a good heat exchange role and further improve the heat exchange effect.

[0084] Figure 12 It is a schematic cross-sectional structure diagram of the tubular reactor 200 provided in this embodiment from the first perspective. Figure 13 It is a schematic cross-sectional structure diagram of the tubular reactor 200 provided in this embodiment from the second perspective. Please refer to Figure 12 and Figure 13 , this embodiment also provides a tubular reactor 200, which includes the above-mentioned stirring shaft 100. Since the tubular reactor 200 includes the above-mentioned stirring shaft 100, it also has the beneficial effects of high heat exchange efficiency, better temperature control effect, and being able to further meet the heat exchange requirements of the material.

[0085] Further, the tubular reactor 200 further includes a reaction housing 210. The reaction housing 210 has a reaction chamber. The stirring shaft 100 is disposed in the reaction chamber to stir the reaction materials in the reaction chamber and promote the uniform mixing of the reaction materials. A plurality of feed pipes 220 communicating with the reaction chamber are further provided on the reaction housing 210. The reaction materials are introduced into the reaction chamber through the feed pipes 220. The plurality of feed pipes 220 are uniformly distributed along the axial direction of the reaction housing 210 to achieve uniform feeding.

[0086] In summary, the embodiment of the present invention provides a stirring shaft 100 and a tubular reactor. By providing a heat exchange structure in the stirring shaft 100, heat can be exchanged from the inside of the material during the stirring process to meet the heat exchange requirements of the material. Moreover, through the specific setting of the structure inside the stirring shaft 100, the heat transfer coefficient is increased, the heat exchange efficiency is higher, and the temperature control effect is better.

[0087] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed by the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A stirring shaft, characterized in that, It includes a shaft body, and the shaft body includes an outer housing and an inner housing disposed within the outer housing; a first chamber and a first opening communicating with the first chamber are provided within the inner housing; A second chamber and a third chamber are formed between the inner housing and the outer housing, and the outer side of the outer housing is used for mounting a heat exchange member having a heat exchange channel, and the second chamber communicates with the third chamber through the heat exchange channel; a communication hole is provided on the inner housing, and the first chamber communicates with the second chamber through the communication hole; the outer housing is further provided with a second opening communicating with the third chamber; The shaft body further includes a partition plate disposed between the inner housing and the outer housing, and the partition plate is used for dividing the area between the inner housing and the outer housing into the second chamber and the third chamber; The stirring shaft further includes a heat exchange member fixedly connected to the outer side of the outer housing, and a heat exchange channel is provided within the heat exchange member, and the two ends of the heat exchange channel communicate with the second chamber and the third chamber respectively.

2. The stirring shaft according to claim 1, wherein The number of the partition plates is at least one, the partition plates are fixedly connected to the inner wall of the outer housing, and a third chamber is formed between each partition plate and the inner wall; The partition plate includes a first radial partition plate and a second radial partition plate, and the first radial partition plate and the second radial partition plate are arranged at intervals along the circumferential direction of the outer housing, and a third chamber is formed between the first radial partition plate and the second radial partition plate of the same partition plate; The partition plate further includes a circumferential partition plate, and the two ends of the circumferential partition plate are respectively fixedly connected to the first radial partition plate and the second radial partition plate; the circumferential partition plate is spaced from the outer housing, and a third chamber is formed between the circumferential partition plate and the outer housing; the circumferential partition plate is spaced from the inner housing so that the third chamber is spaced from the inner housing; The shaft body further includes a closing plate disposed between the inner housing and the outer housing, and the closing plate is used for closing the second chamber; The closing plate is sleeved outside the inner housing, and a sealing member is provided between the inner housing and the closing plate; A shoulder is provided outside the inner housing, the closing plate is sleeved on the shoulder, and the sealing member is provided between the shoulder and the closing plate.

3. The stirring shaft according to claim 1, characterized in that, The heat exchange member is a stirring blade.

4. The stirring shaft according to claim 3, characterized in that, A flow disturbing structure is further provided within the heat exchange channel of the heat exchange member.

5. The stirring shaft according to claim 4, characterized in that, The flow disturbing structure includes a flow disturbing member provided within the heat exchange channel; Alternatively, the flow disturbing structure includes grooves or protrusions provided on the wall surface of the heat exchange channel.

6. The stirring shaft according to claim 3, characterized in that, On the cross-section of the outer housing, the number of the heat exchange members arranged along the circumferential direction of the outer housing is m, and the sum of the numbers of the second chamber and the third chamber is n; when m is an even number, m ≤ (n - 1) × 2; when m is an odd number, m ≤ (n - 1) × 2 - 1.

7. The stirring shaft according to claim 6, characterized in that, When m is an even number, m = (n - 1) × 2; when m is an odd number, m = (n - 1) × 2 - 1.

8. The stirring shaft according to claim 6, wherein, The number of the heat exchange members is an even number.

9. The stirring shaft according to claim 8, wherein The number of the heat exchange members is 4, 6 or 8.

10. The stirring shaft according to claim 3, characterized in that, The tangent of the surface of the stirring blade forms an angle with the rotation axis of the shaft body; The stirring blade is used to make the stirred material tend to move towards the material outlet.

11. The stirring shaft according to claim 10, characterized in that, The included angle between the tangent line of the surface of the heat exchange member and the rotation axis of the shaft body is β, where 0° < β ≤ 45°.

12. The stirring shaft according to claim 10, wherein, The surface of the heat exchange member is a plane, and the plane is arranged at an angle with the rotation axis of the shaft body.

13. The stirring shaft according to claim 10, characterized in that, The included angle between the connection line between the inlet and the outlet of the heat exchange channel and the axis of the shaft body is α, where 0° < α ≤ 45°.

14. The stirring shaft according to any one of claims 1-13, characterized in that, The shaft body further includes a rotary joint, and both the inner housing and the outer housing are rotatably connected to the rotary joint; the first opening and the second opening are both formed in the rotary joint; The communication hole and the first opening are respectively located at both ends of the inner housing; Alternatively, the communication hole is located at the end of the inner housing away from the first opening.

15. The stirring shaft according to any one of claims 1-13, characterized in that, The number of the communication holes is multiple, and the multiple communication holes are formed in the peripheral wall of the inner housing; The sum of the apertures of the multiple communication holes is greater than or equal to the radial dimension of the first chamber.

16. The stirring shaft according to any one of claims 1-13, characterized in that, The outer side of the outer housing has a heat exchange area for installing the heat exchange member; along the axial direction of the shaft body, the heat exchange area is located between the second opening and the communication hole.

17. A tubular reactor, characterized in that, The tubular reactor includes the stirring shaft according to any one of claims 1-16.

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