Reactor and reaction system for quantum dot synthesis

Abstract

The present application provides a reactor and a reaction system for quantum dot synthesis, which relate to the field of quantum dot synthesis. The reactor includes a plurality of reaction tubes connected in sequence, the plurality of reaction tubes extend along the height direction of the reactor and form a bent pipe, and allow materials to flow from the top of the plurality of reaction tubes to the bottom. The reaction system includes a first heating device and a reactor, and the first heating device is configured to heat the reactor. When the reactor is heated, the material in the reactor can reach the target temperature faster and react more completely.

Description

Technical Field

[0001] The present application relates to the field of quantum dot synthesis, and in particular, to a reactor and a reaction system for quantum dot synthesis. Background Art

[0002] Quantum dots are an important low-dimensional semiconductor material, and their sizes in three dimensions are no greater than twice the exciton Bohr radius of the corresponding semiconductor material. Quantum dots are generally spherical or quasi-spherical, and their diameters are usually between 2-20nm. During the synthesis of quantum dots, rapid heating and cooling not only affects the particle uniformity of quantum dots, but also has an important impact on the uniformity and quality of the shell growth during the shell coating process of quantum dots. Summary of the invention

[0003] The embodiments of the present application provide a reactor and a reaction system for quantum dot synthesis. When the reactor is heated, the material in the reactor can reach the target temperature more quickly and react more completely.

[0004] The embodiment of the present application is implemented as follows:

[0005] In a first aspect, an embodiment of the present application provides a reactor for quantum dot synthesis, the reactor comprising a plurality of reaction tubes connected in sequence, the plurality of reaction tubes extending along the height direction of the reactor to form a bent pipe, and allowing materials to flow from the top end to the bottom end of the plurality of reaction tubes.

[0006] In the above technical solution, the material flows from the top of multiple reaction tubes to the bottom through multiple reaction tubes connected in sequence. When the reactor is heated, the material reacts in the reaction tube. Since the multiple reaction tubes extend along the height direction of the reactor and form a bent pipe, the material is distributed in the multiple reaction tubes of the bent pipe, avoiding large amounts of material accumulation, so that the material in the reactor can reach the target temperature faster, and the material can stay in the bent pipe for a longer time, which is conducive to the full reaction of the material.

[0007] In a possible embodiment, the reaction tube includes a first reaction tube and a second reaction tube, the first reaction tube and the second reaction tube are alternately arranged along the height direction of the reactor, the second reaction tube is arranged along the width direction of the reactor, and the angle between the extension direction of one end of the first reaction tube away from the second reaction tube and the extension direction of one end of the second reaction tube away from the first reaction tube is an acute angle.

[0008] In the above technical solution, this arrangement is compact and can save space. Since the second reaction tube is arranged along the width direction of the reactor, the material in the first reaction tube can stay in the second reaction tube for a longer time after entering the second reaction tube so that the material can fully react; under the thrust of the material in the first reaction tube, the material in the second reaction tube enters the next first reaction tube. The angle between the extension direction of the end of the first reaction tube away from the second reaction tube and the extension direction of the end of the second reaction tube away from the first reaction tube is an acute angle, so the material can enter the second reaction tube relatively smoothly from the first reaction tube, and compared with a right angle or an obtuse angle, the setting of the acute angle can make it more difficult for the material in the first reaction tube to enter the second reaction tube, so that the material in the first reaction tube stays for a sufficient time to react.

[0009] In a possible embodiment, an angle between an extension direction of an end of the first reaction tube away from the second reaction tube and an extension direction of an end of the second reaction tube away from the first reaction tube is 30-60°.

[0010] In the above technical solution, the angle between the extension direction of the end of the first reaction tube away from the second reaction tube and the extension direction of the end of the second reaction tube away from the first reaction tube is 30-60°, which is more conducive to achieving a better balance in the residence time of the material in the first reaction tube and smooth entry into the second reaction tube.

[0011] In a possible embodiment, the plurality of reaction tubes are arranged in a spiral along the height direction of the reactor.

[0012] In the above technical solution, the plurality of reaction tubes are spirally arranged along the height direction of the reactor so that the reaction tubes are relatively dispersed, which is more conducive to rapidly and evenly heating the reactor.

[0013] In a possible implementation manner, the connection point between the first reaction tube and the second reaction tube is an arc tube.

[0014] In the above technical solution, when the material passes through the connection between the first reaction tube and the second reaction tube, since the connection is a circular arc tube, the material is not easy to accumulate at the connection, thereby avoiding the accumulation of the material in the reaction tube.

[0015] In one possible embodiment, the ratio of the length to the inner diameter of each reaction tube is 10-20:1.

[0016] In the above technical solution, the inventors have found that setting the ratio of the length to the inner diameter of the reaction tube to 10-20:1 can not only enable the material to reach the target temperature in the reaction tube in a shorter time for reaction, but also ensure that the material stays in the reaction tube long enough to better achieve complete reaction of the material.

[0017] In a possible embodiment, each reaction tube is a straight tube.

[0018] In the above technical solution, the reaction tubes are all straight tubes, which can better avoid the accumulation of materials in the reaction tubes and affect the complete reaction of the materials.

[0019] In a second aspect, an embodiment of the present application provides a reaction system, comprising a first heating device and a reactor for quantum dot synthesis according to an embodiment of the first aspect, wherein the first heating device is configured to heat the reactor.

[0020] In the above technical solution, the reactor is heated by the first heating device, and the material reacts in the reaction tube. Since multiple reaction tubes extend along the height direction of the reactor and form a curved pipe, the material is distributed in the curved pipe, which avoids large amounts of material accumulation, so that the material in the reactor can reach the target temperature faster, and the material can stay in the curved pipe for a longer time, which is conducive to the full reaction of the material.

[0021] In a possible embodiment, the reaction system further includes a stirring device, and the discharge end of the stirring device is connected to the feed pipe section of the reaction tube.

[0022] In the above technical solution, the stirring device is used to stir the material evenly, and the stirred material enters the reaction tube for reaction, which is conducive to the complete reaction of the material. In addition, compared with the method of heating the reaction in the stirring device, by setting the stirring device and the reactor separately, the effect of rapid heating and cooling can be achieved while ensuring uniform stirring.

[0023] In a possible embodiment, the stirring device includes a stirring body, a feeding component, a driving member and a stirring component;

[0024] The stirring assembly includes a connecting shaft and at least one first propulsion stirring paddle and at least one second propulsion stirring paddle connected to the connecting shaft, and the pushing directions of the first propulsion stirring paddle and the second propulsion stirring paddle are opposite; the first propulsion stirring paddle includes at least two first blades, and the at least two first blades are distributed along the circumference of the connecting shaft; the second propulsion stirring paddle includes at least two second blades, the second blades are fixed to the connecting shaft through a support rod, the at least two second blades are distributed along the circumference of the connecting shaft, and the second blades and the first blades are staggered in the radial direction of the connecting shaft;

[0025] The first propulsion stirring paddle and the second propulsion stirring paddle are both arranged in the stirring body, and the driving member is installed on the stirring body and is transmission-connected to the connecting shaft for driving the connecting shaft to rotate around the axis;

[0026] The feeding assembly comprises a feeding pipe, one end of which is arranged inside the stirring body and above the first propulsion stirring paddle and the second propulsion stirring paddle, and the other end of the feeding pipe is arranged outside the stirring body.

[0027] In the above technical scheme, the connecting shaft is driven to rotate by the driving member, thereby driving the first propulsion stirring paddle and the second propulsion stirring paddle to rotate. Since the pushing directions of the first propulsion stirring paddle and the second propulsion stirring paddle are opposite, the flow directions of the liquid around the first propulsion stirring paddle and the second propulsion stirring paddle are respectively from top to bottom and from bottom to top, which can meet the requirement of uniform mixing of materials in the axial direction. During the stirring process, since the flow directions of the materials around the first propulsion stirring paddle and the second propulsion stirring paddle are different, the materials can converge between the adjacent first propulsion stirring paddle and the second propulsion stirring paddle to form a turbulent layer, so that the flow direction of the materials changes and flows around, so as to achieve the purpose of radial uniform mixing, and the second blade and the first blade are staggered in the radial direction of the connecting shaft, so that the materials form a rotating flow direction during the stirring process, so that the materials have a higher mixing uniformity and improve the stirring effect. In addition, while the stirring assembly rotates, the materials are transported to the stirring body through the feeding pipe, and one end of the feeding pipe is located above the first propulsion stirring paddle and the second propulsion stirring paddle, which is conducive to the materials falling directly on the first blade or the second blade, so as to better stir and mix the materials.

[0028] In a possible embodiment, the feeding assembly also includes a discharge ring with a hollow interior, the discharge ring is arranged in the stirring body and connected to one end of the feeding pipe, the discharge ring is arranged outside the connecting shaft and is spaced apart from the connecting shaft, the discharge ring is arranged above the first propulsion stirring paddle and the second propulsion stirring paddle, and at least one discharge port is opened on the side of the discharge ring facing the first propulsion stirring paddle and the second propulsion stirring paddle.

[0029] In the above technical solution, the material enters the discharge ring from the feeding pipe, and the material can be preliminarily mixed during the movement of the discharge ring to improve the mixing uniformity of the material, and finally discharged from the discharge port of the discharge ring. Since the discharge port is arranged facing the side of the first propulsion stirring paddle and the second propulsion stirring paddle, the material discharged from the discharge port is more likely to fall directly on the first blade or the second blade, thereby better stirring and mixing the material. In addition, the discharge ring is arranged outside the connecting shaft and is spaced from the connecting shaft. In the process of adding materials through the discharge ring, the rotation of the connecting shaft and the first propulsion stirring paddle and the second propulsion stirring paddle will not be hindered, so that the stirring process of the stirring assembly proceeds smoothly.

[0030] In a possible embodiment, the reaction system further comprises a second heating device for heating the stirring device.

[0031] In the above technical solution, the stirring device is heated by the second heating device, so that some materials that are relatively easy to coagulate can be prevented from coagulating during the stirring time due to the low temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0033] Figure 1 A schematic diagram of the structure of a reactor provided in an embodiment of the present application;

[0034] Figure 2 A schematic diagram of the structure of the reaction system provided in the embodiment of the present application;

[0035] Figure 3 A schematic diagram of the structure of a stirring device provided in an embodiment of the present application;

[0036] Figure 4 A schematic diagram of the structure of the discharge ring provided in an embodiment of the present application.

[0037] Icons: 10-reaction system; 100-reactor; 110-first reaction tube; 120-second reaction tube; 130-arc tube; 200-first heating device; 300-stirring device; 310-stirring assembly; 311-first propulsion stirring paddle; 3111-first blade; 312-second propulsion stirring paddle; 3121-support rod; 3122-second blade; 313-connecting shaft; 320-stirring body; 330-feeding assembly; 331-feeding tube; 3311-first feeding section; 3312-second feeding section; 332-discharge ring; 3321-discharge port; 340-driving member; 400-receiving tank; 510-feed valve; 520-discharge valve. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0039] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0040] In the description of this application, it should be noted that the terms "inside", "top", "bottom", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the application is usually placed when in use, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0041] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0042] The present application embodiment provides a reactor 100 for synthesizing quantum dots. Figure 1 The reactor 100 includes a plurality of reaction tubes connected in sequence, the plurality of reaction tubes extend along the height direction of the reactor 100 and form a bent pipe, and allow the material to flow from the top end to the bottom end of the plurality of reaction tubes.

[0043] The material flows from the top of the multiple reaction tubes to the bottom through the multiple reaction tubes connected in sequence. When the reactor 100 is heated, the material reacts in the reaction tubes. Since the multiple reaction tubes extend along the height direction of the reactor 100 and form a bent pipe, the material is distributed in the multiple reaction tubes of the bent pipe, avoiding a large amount of material accumulation, so that the material in the reactor 100 can reach the target temperature faster, and the material can stay in the bent pipe for a longer time, which is conducive to the full reaction of the material.

[0044] In a possible embodiment, a plurality of reaction tubes are spirally arranged along the height direction of the reactor 100 .

[0045] The multiple reaction tubes are spirally arranged along the height direction of the reactor 100 so that the reaction tubes are relatively dispersed, which is more conducive to quickly and evenly heating the reactor 100.

[0046] It is understandable that in other embodiments, the plurality of reaction tubes may be arranged to be distributed substantially in the same plane, that is, the connecting line formed by the axis of each reaction tube is substantially located in the same plane.

[0047] In addition, illustratively, each reaction tube is a straight tube. Compared with a reaction tube with an uneven inner wall, the reaction tubes are all straight tubes, which can better avoid the accumulation of materials in the reaction tubes and affect the complete reaction of the materials. In other embodiments, the reaction tubes can also be configured as arc tubes.

[0048] Alternatively, in one possible embodiment, the ratio of the length to the inner diameter of each reaction tube is 10-20:1, for example, any one of 10:1, 12:1, 13:1, 15:1, 16:1, 18:1 and 20:1, or a range between any two of them.

[0049] The inventors have found that setting the ratio of the length to the inner diameter of the reaction tube to 10-20:1 can not only enable the material to reach the target temperature in a shorter time in the reaction tube for reaction, but also ensure that the material stays in the reaction tube for a long enough time to better achieve the complete reaction of the material. This may be because, when the length of the reaction tube is constant, the larger the inner diameter of the reaction tube, the more material there will be in each reaction tube, which will increase the time it takes for the material to reach the target temperature; when the inner diameter of the reaction tube is constant, the shorter the length of the reaction tube, the shorter the time the material stays in the reaction tube, which may affect the degree of reaction.

[0050] Further, in a possible embodiment, the reaction tube includes a first reaction tube 110 and a second reaction tube 120, the first reaction tube 110 and the second reaction tube 120 are alternately arranged along the height direction of the reactor 100, the second reaction tube 120 is arranged along the width direction of the reactor 100, and the angle α between the extension direction of one end of the first reaction tube 110 away from the second reaction tube 120 and the extension direction of one end of the second reaction tube 120 away from the first reaction tube 110 is an acute angle.

[0051] The inventor has found that if the first reaction tube 110 and the second reaction tube 120 are alternately arranged along the height direction of the reactor 100, and the second reaction tube 120 is arranged along the width direction of the reactor 100, the angle α between the extension direction of the end of the first reaction tube 110 away from the second reaction tube 120 and the extension direction of the end of the second reaction tube 120 away from the first reaction tube 110 is partially acute and partially right or obtuse, or the angle α between the extension direction of the end of the first reaction tube 110 away from the second reaction tube 120 and the extension direction of the end of the second reaction tube 120 away from the first reaction tube 110 is all obtuse, which wastes space. The arrangement method in which the angle α between the extension direction of the end of the first reaction tube 110 away from the second reaction tube 120 and the extension direction of the end of the second reaction tube 120 away from the first reaction tube 110 is an acute angle makes the structure compact and can save space.

[0052] In addition, since the second reaction tube 120 is arranged along the width direction of the reactor 100, the material in the first reaction tube 110 can stay in the second reaction tube 120 for a longer time after entering the second reaction tube 120 so that the material can fully react; under the thrust of the material in the first reaction tube 110, the material in the second reaction tube 120 enters the next first reaction tube 110, and the angle α between the extension direction of the end of the first reaction tube 110 away from the second reaction tube 120 and the extension direction of the end of the second reaction tube 120 away from the first reaction tube 110 is an acute angle, so that the material in the first reaction tube 110 can enter the next second reaction tube 120 relatively smoothly, and compared with a right angle or an obtuse angle, the setting of the acute angle can make it more difficult for the material in the first reaction tube 110 to enter the second reaction tube 120, so that the material in the first reaction tube 110 stays for a sufficient time to react.

[0053] For example, the angle between the extension direction of the end of the first reaction tube 110 away from the second reaction tube 120 and the extension direction of the end of the second reaction tube 120 away from the first reaction tube 110 is 30-60°. This arrangement is more conducive to achieving a better balance between the residence time of the material in the first reaction tube 110 and the smooth entry into the second reaction tube 120.

[0054] Optionally, the connection between the first reaction tube 110 and the second reaction tube 120 is an arc tube 130. When the material passes through the connection between the first reaction tube 110 and the second reaction tube 120, since the connection is an arc tube 130, the material is not easy to accumulate at the connection, thereby avoiding the accumulation of the material in the reaction tube to affect the reaction of the material.

[0055] The present application also provides a reaction system 10, please refer to Figure 2The reaction system 10 includes a first heating device 200 and a reactor 100 for quantum dot synthesis according to an embodiment of the present application. The first heating device 200 is configured to heat the reactor 100 .

[0056] Exemplarily, the reaction tube of the reactor 100 can be configured as a metal pipe, such as a steel pipe, a galvanized pipe, etc.; it can also be configured as a high-temperature resistant ceramic pipe, such as a silicon oxide ceramic tube, a silicon nitride ceramic tube, etc.

[0057] For example, the first heating device 200 can be an electric heating device, a microwave heating device, or an oil bath pot, etc., and the corresponding heating methods are electric heating, microwave heating, and oil heating. The embodiment of the present application does not limit the specific type of the first heating device 200, as long as it can heat the reactor 100.

[0058] The reactor 100 is heated by the first heating device 200, and the material reacts in the reaction tube. Since the multiple reaction tubes extend along the height direction of the reactor 100 and form a curved pipe, the material is distributed in the curved pipe, thereby avoiding a large amount of material accumulation, so that the material in the reactor 100 can reach the target temperature faster, and the material can stay in the curved pipe for a longer time, which is conducive to the full reaction of the material.

[0059] Furthermore, in a possible embodiment, the reaction system 10 further includes a stirring device 300, and a discharge end of the stirring device 300 is connected to a feed pipe section of the reaction tube.

[0060] The stirring device 300 is used to stir the material evenly, and the stirred material enters the reaction tube for reaction, which is conducive to the complete reaction of the material. Exemplarily, the feed pipe section is equipped with a feed valve 510, and the feed valve 510 can control the material mixed evenly by the stirring device 300 to enter the reaction tube. Optionally, the feed valve 510 is a ball valve, a butterfly valve or a solenoid valve; the ball valve can be an electric ball valve or a pneumatic ball valve, and the butterfly valve can be an electric butterfly valve or a pneumatic butterfly valve. It should be noted that the embodiment of the present application does not limit the specific type of the feed valve 510, as long as the function of the valve can be realized.

[0061] Moreover, compared with the method of performing heating reaction in the stirring device 300, by setting the stirring device 300 and the reactor 100 separately, the effect of rapid temperature rise and fall can be achieved while ensuring uniform stirring. Because, if the heating reaction is performed in the stirring device 300, the reaction is performed while stirring, which will affect the complete reaction of the material, and the material is concentrated in the stirring device 300, which is not conducive to rapid temperature rise.

[0062] For example, please refer to Figure 3The stirring device 300 includes a stirring body 320 , a feeding assembly 330 , a driving member 340 and a stirring assembly 310 .

[0063] The stirring assembly 310 includes a connecting shaft 313 and at least one first propulsion stirring paddle 311 and at least one second propulsion stirring paddle 312 connected to the connecting shaft 313, that is, one, two, three or more first propulsion stirring paddles 311 can be provided, and one, two, three or more second propulsion stirring paddles 312 can also be provided, and one of the first propulsion stirring paddles 311 and one of the second propulsion stirring paddles 312 will be arranged adjacent to each other. In addition, the first propulsion stirring paddle 311 and the second propulsion stirring paddle 312 have opposite pushing directions. The first propulsion stirring paddle 311 and the second propulsion stirring paddle 312 are both arranged in the stirring body 320. It should be noted that in other embodiments, a common stirring paddle, such as an anchor paddle, can also be used, and only one stirring paddle can also be provided.

[0064] The driving member 340 is installed on the stirring body 320 and is in transmission connection with the connecting shaft 313, and is used to drive the connecting shaft 313 to rotate around the axis. For example, the driving member 340 can be a driving motor, a reduction motor, etc. The embodiment of the present application does not specifically limit the driving member 340, as long as it can drive the connecting shaft 313 to rotate around the axis.

[0065] The connecting shaft 313 is driven to rotate by the driving member 340, thereby driving the first propulsion stirring paddle 311 and the second propulsion stirring paddle 312 to rotate. Since the first propulsion stirring paddle 311 and the second propulsion stirring paddle 312 have opposite pushing directions, the flow directions of the liquid around the first propulsion stirring paddle 311 and the second propulsion stirring paddle 312 are respectively from top to bottom and from bottom to top, which can meet the requirement of uniform mixing of materials in the axial direction.

[0066] It can be understood that the flow of the material pushed by the first propulsion stirring paddle 311 and the second propulsion stirring paddle 312 from top to bottom or from bottom to top is related to the rotation direction of the connecting shaft 313. A first propulsion stirring paddle 311 and a second propulsion stirring paddle 312 arranged adjacent to each other can form a combination. When coordinated with the rotation direction of the connecting shaft 313, the combination formed by a first propulsion stirring paddle 311 and a second propulsion stirring paddle 312 can make the material flow move from top to bottom and from bottom to top respectively, and meet between the first propulsion stirring paddle 311 and the second propulsion stirring paddle 312 to form a turbulent layer, so that the flow direction of the material changes and flows to the surroundings, so as to achieve the purpose of radial mixing uniformity.

[0067] The first propulsion stirring paddle 311 includes at least two first blades 3111, and the at least two first blades 3111 are distributed along the circumference of the connecting shaft 313. That is, the first propulsion stirring paddle 311 can be provided with two first blades 3111, three first blades 3111 or more first blades 3111.

[0068] The second propulsion stirring paddle 312 includes at least two second blades 3122. That is, the second propulsion stirring paddle 312 can be provided with two second blades 3122, three second blades 3122, or more second blades 3122. The second blades 3122 are fixed to the connecting shaft 313 through the support rod 3121, and at least two second blades 3122 are distributed along the circumference of the connecting shaft 313, and the second blades 3122 and the first blades 3111 are staggered in the radial direction of the connecting shaft 313.

[0069] The combination of the first propulsion stirring paddle 311 and the second propulsion stirring paddle 312 can make the material flow move from top to bottom and from bottom to top respectively, and intersect between the first propulsion stirring paddle 311 and the second propulsion stirring paddle 312 to form a turbulent layer, and because the second blade 3122 and the first blade 3111 are staggered in the radial direction of the connecting shaft 313, the material forms a rotating flow direction during the stirring process, so that the material has a higher mixing uniformity and the stirring effect is improved.

[0070] In a possible implementation, at least two of the first propulsion stirring paddles 311 and the second propulsion stirring paddles 312 are provided, and the first propulsion stirring paddles 311 and the second propulsion stirring paddles 312 are alternately spaced and distributed along the axial direction of the connecting shaft 313 .

[0071] Since a first propulsion stirring paddle 311 and a second propulsion stirring paddle 312 that are adjacent to each other can form a combination, at least two first propulsion stirring paddles 311 and second propulsion stirring paddles 312 are each provided with at least two. This arrangement in which the first propulsion stirring paddles 311 and the second propulsion stirring paddles 312 are alternately and spaced apart along the axial direction of the connecting shaft 313 can form at least two groups of combinations, so that two material flows with different flow directions converge to form a turbulent layer, and a rotating flow direction is formed during the stirring process, so that the material has a higher mixing uniformity and the stirring effect is improved.

[0072] It should be noted that the second blade 3122 and the first blade 3111 are staggered in the radial direction of the connecting shaft 313. The length of the support rod 3121 in the radial direction of the connecting shaft 313 can be greater than the length of the first blade 3111 in the radial direction of the connecting shaft 313, or the length of the support rod 3121 in the radial direction of the connecting shaft 313 can be less than or equal to the length of the first blade 3111 in the radial direction of the connecting shaft 313, as long as the second blade 3122 and the first blade 3111 are staggered in the radial direction of the connecting shaft 313.

[0073] Exemplarily, the ratio of the length of the support rod 3121 in the radial direction of the connecting shaft 313 to the length of the first blade 3111 in the radial direction of the connecting shaft 313 is 0.5-1.5:1.

[0074] In the stirring assembly 310 of the embodiment of the present application, the first paddle 3111 and the second paddle 3122 play a stirring role. Since the ratio of the length of the support rod 3121 in the radial direction of the connecting shaft 313 to the length of the first paddle 3111 in the radial direction of the connecting shaft 313 is 0.5 to 1.5:1, the material around the first paddle 3111 and the material around the second paddle 3122 can achieve a greater degree of material rotation when they meet between the first paddle 3111 and the second paddle 3122, and the material mixing is more uniform.

[0075] The feeding assembly 330 includes a feeding pipe 331 , one end of which is disposed inside the stirring body 320 and above the first propulsion stirring paddle 311 and the second propulsion stirring paddle 312 , and the other end of the feeding pipe 331 is disposed outside the stirring body 320 .

[0076] While the stirring assembly 310 rotates, the material is transported to the stirring body 320 through the feeding pipe 331. One end of the feeding pipe 331 is located above the first propulsion stirring paddle 311 and the second propulsion stirring paddle 312, which is conducive to the material falling directly on the first blade 3111 or the second blade 3122, thereby better stirring and mixing the material.

[0077] For further information, please refer to Figure 3 and Figure 4 In a possible embodiment, the feeding assembly 330 also includes a discharge ring 332 with a hollow interior. The discharge ring 332 is arranged in the stirring body 320 and is connected to one end of the feeding pipe 331. The discharge ring 332 is arranged outside the connecting shaft 313 and is spaced apart from the connecting shaft 313. The discharge ring 332 is arranged above the first propulsion stirring paddle 311 and the second propulsion stirring paddle 312, and at least one discharge port 3321 is opened on the side of the discharge ring 332 facing the first propulsion stirring paddle 311 and the second propulsion stirring paddle 312.

[0078] The material enters the discharge ring 332 from the feeding pipe 331, and the material can be preliminarily mixed during the movement of the discharge ring 332 to improve the mixing uniformity of the material, and finally discharged from the discharge port 3321 of the discharge ring 332. Since the discharge port 3321 is arranged facing the first propulsion stirring paddle 311 and the second propulsion stirring paddle 312, the material discharged from the discharge port 3321 is more likely to fall directly on the first blade 3111 or the second blade 3122, so as to better stir and mix the material. In addition, the discharge ring 332 is arranged outside the connecting shaft 313 and is spaced from the connecting shaft 313. In the process of adding materials through the discharge ring 332, the rotation of the connecting shaft 313 and the first propulsion stirring paddle 311 and the second propulsion stirring paddle 312 will not be hindered, so that the stirring process of the stirring component 310 proceeds smoothly.

[0079] Please continue to refer to Figure 3 In a possible embodiment, the feeding pipe 331 includes a first feeding section 3311 and a second feeding section 3312 which are connected, one end of the first feeding section 3311 is arranged outside the stirring body 320, and the second feeding section 3312 is arranged vertically, one end of the second feeding section 3312 is connected to the cavity of the discharge ring 332, and the second feeding section 3312 is perpendicular to the plane where the discharge ring 332 is located.

[0080] When the material enters the discharge ring 332 from the second feeding section 3312, since the second feeding section 3312 is perpendicular to the plane where the discharge ring 332 is located, the material can not only enter the discharge ring 332 relatively smoothly, but also stay in the discharge ring 332 for a long time for preliminary mixing. This is because if the second feeding section 3312 and the plane where the discharge ring 332 are located form an acute angle, it is difficult for the material to enter the discharge ring 332 from the second feeding section 3312, and if the second feeding section 3312 and the plane where the discharge ring 332 are located form an obtuse angle, the time the material stays in the discharge ring 332 will be reduced. Optionally, the discharge ring 332 is a circular ring. When the material passes through the discharge ring 332, since the discharge ring 332 is a circular ring, the material is not easy to accumulate in the discharge ring 332. In other embodiments, the discharge ring 332 can also be a rectangular ring or a triangular ring.

[0081] In a possible implementation, part or all of the at least one discharge port 3321 are arranged corresponding to the first blade 3111 and / or the second blade 3122. The discharge port 3321 may be one, two, three or more.

[0082] When there are more than or equal to two discharge ports 3321, all of the discharge ports 3321 may be arranged corresponding to the first paddle 3111, or all of the discharge ports 3321 may be arranged corresponding to the second paddle 3122, or a part of the discharge ports 3321 may be arranged corresponding to the first paddle 3111, and the rest of the discharge ports 3321 may be arranged corresponding to neither the first paddle 3111 nor the second paddle 3122. Of course, a part of the discharge ports 3321 may be arranged corresponding to the first paddle 3111, and the rest of the discharge ports 3321 may be arranged corresponding to neither the first paddle 3111 nor the second paddle 3122; a part of the discharge ports 3321 may be arranged corresponding to the second paddle 3122, and the rest of the discharge ports 3321 may be arranged corresponding to neither the first paddle 3111 nor the second paddle 3122.

[0083] When the number of discharge ports 3321 is greater than or equal to 3, it can be arranged that a part of the discharge ports 3321 is arranged corresponding to the first blade 3111, a part of the remaining part is arranged corresponding to the second blade 3122, and the rest is neither arranged corresponding to the first blade 3111 nor the second blade 3122.

[0084] It should be noted that the corresponding setting here means that the distance between a point on the first blade 3111 or the second blade 3122 and the connecting shaft 313 is substantially equal to the distance between the center of the discharge port 3321 and the connecting shaft 313. Then, when the material is discharged from the discharge port 3321 of the discharge ring 332, it can directly fall on the first blade 3111 and / or the second blade 3122, thereby improving the mixing uniformity.

[0085] Optionally, the reaction system 10 further comprises a second heating device for heating the stirring device 300. By heating the stirring device 300 by the second heating device, it is possible to prevent some materials that are relatively easy to coagulate from coagulating during the stirring time due to low temperature.

[0086] For example, the second heating device can be an electric heating device, a microwave heating device or an oil bath pot, etc., and the corresponding heating methods are electric heating, microwave heating and oil heating. The embodiment of the present application does not limit the specific type of the second heating device, as long as it can achieve heating of the reactor 100.

[0087] In addition, optionally, the kettle body of the stirring device 300 can be a stainless steel stirring body, a glass stirring body or an enamel stirring body, etc.

[0088] Furthermore, in a possible embodiment, the reaction system 10 further includes a receiving tank 400, and the feed port of the receiving tank 400 is connected to the discharge pipe section of the reaction tube of the reactor 100. The reacted material in the reactor 100 can be collected through the receiving tank 400 for further processing.

[0089] Optionally, the discharge pipe section of the reaction tube is equipped with a discharge valve 520, through which the materials after the reaction of the reactor 100 can be controlled to enter the receiving tank 400. Optionally, the discharge valve 520 is a ball valve, a butterfly valve or a solenoid valve; the ball valve can be an electric ball valve or a pneumatic ball valve, and the butterfly valve can be an electric butterfly valve or a pneumatic butterfly valve. It should be noted that the embodiment of the present application does not limit the specific type of the discharge valve 520, as long as the function of the valve can be realized.

[0090] The working principle of a reaction system 10 in the embodiment of the present application is as follows:

[0091] The raw materials are stirred evenly in the stirring device 300. After the feed valve 510 is opened, the evenly mixed raw materials enter the reactor 100 in the treatment heating state. The reaction temperature of the reactor 100 is controlled by adjusting the heating temperature of the first heating device 200 in advance, and the evenly mixed raw materials react in the reaction tube. Since the multiple reaction tubes extend along the height direction of the reactor 100 and form a bent pipe, the materials are distributed in the multiple reaction tubes of the bent pipe, which avoids the accumulation of a large amount of materials, so that the materials in the reactor 100 can reach the target temperature quickly, and the materials can stay in the bent pipe for a long time, which is conducive to the full reaction of the materials.

[0092] After the reaction is finished, the discharge valve 520 is opened to collect the reacted materials into the receiving tank 400 for subsequent processing.

[0093] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A reactor for quantum dot synthesis, characterized in that: The reactor comprises a plurality of reaction tubes connected in sequence, wherein the plurality of reaction tubes extend along the height direction of the reactor and form a bent pipe, and allow materials to flow from the top ends of the plurality of reaction tubes to the bottom ends; The reaction tube comprises a first reaction tube and a second reaction tube, the first reaction tube and the second reaction tube are alternately arranged along the height direction of the reactor, the second reaction tube is horizontally arranged along the width direction of the reactor, and the connection between the first reaction tube and the second reaction tube is an arc tube; An angle between an extension direction of one end of the first reaction tube away from the second reaction tube and an extension direction of one end of the second reaction tube away from the first reaction tube is 30-60°; The plurality of reaction tubes are arranged spirally along the height direction of the reactor; The ratio of the length to the inner diameter of each reaction tube is 10-20:

1.

2. A reaction system, characterized in that: The invention comprises a first heating device and the reactor for quantum dot synthesis as claimed in claim 1, wherein the first heating device is configured to heat the reactor.

3. The reaction system according to claim 2, characterized in that: The reaction system further comprises a stirring device, and a discharge end of the stirring device is communicated with a feed pipe section of the reaction tube.

4. The reaction system according to claim 3, characterized in that: The stirring device comprises a stirring body, a feeding assembly, a driving member and a stirring assembly; The stirring assembly includes a connecting shaft and at least one first propulsion stirring paddle and at least one second propulsion stirring paddle connected to the connecting shaft, and the pushing directions of the first propulsion stirring paddle and the second propulsion stirring paddle are opposite; the first propulsion stirring paddle includes at least two first blades, and the at least two first blades are distributed along the circumference of the connecting shaft; the second propulsion stirring paddle includes at least two second blades, the second blades are fixed to the connecting shaft through support rods, the at least two second blades are distributed along the circumference of the connecting shaft, and the second blades and the first blades are staggered in the radial direction of the connecting shaft; The first propulsion stirring paddle and the second propulsion stirring paddle are both arranged in the stirring body, and the driving member is installed on the stirring body and is drivingly connected to the connecting shaft, and is used to drive the connecting shaft to rotate around the axis; The feeding assembly includes a feeding pipe, one end of which is arranged inside the stirring body and above the first propulsion stirring paddle and the second propulsion stirring paddle, and the other end of the feeding pipe is arranged outside the stirring body.

5. The reaction system according to claim 4, characterized in that: The feeding assembly also includes a discharge ring with a hollow interior, the discharge ring is arranged in the stirring body and connected to one end of the feeding pipe, the discharge ring is arranged outside the connecting shaft and is spaced from the connecting shaft, the discharge ring is arranged above the first propulsion stirring paddle and the second propulsion stirring paddle, and at least one discharge port is opened on the side of the discharge ring facing the first propulsion stirring paddle and the second propulsion stirring paddle.

6. The reaction system according to claim 3, characterized in that: The reaction system further comprises a second heating device for heating the stirring device.

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