Continuous dynamic microreactor

Abstract

The utility model discloses a continuous dynamic microreactor and belongs to the technical field of chemical reactors. The reactor comprises at least two heat exchangers which are arranged in parallel, every two adjacent heat exchangers are connected in series through a mixing cavity and a connecting bent pipe, and a feeding cavity and a discharging cavity are formed in one ends of the two heat exchangers located on the two sides respectively; stirrers are arranged in the mixing cavity and the feeding cavity; the tube passes of the plurality of heat exchangers are respectively communicated with the corresponding feeding cavity, the mixing cavity, the connecting elbow and the discharging cavity, and the shell pass of each heat exchanger is provided with a heat exchange medium inlet and a heat exchange medium outlet; one end of the connecting bent pipe is communicated with the middle of the mixing cavity, and the ends, away from the heat exchanger, of the mixing cavity and the feeding cavity are closed through a cover plate; and at least one feeding hole is formed in each of the feeding cavity and the mixing cavity. The continuous dynamic micro-reactor provided by the utility model can realize a continuous flow process, is strong in heat exchange capability, has a good horizontal pushing effect and is small in backmixing.

Description

TECHNICAL FIELD

[0001] The utility model relates to chemical reactor technical field, concretely relates to a continuous dynamic microreactor. BACKGROUND

[0002] At present, dynamic tubular reactor is gradually valued in chemical continuous production, and is more and wide applied.Compared with reaction kettle, dynamic tubular reactor has great promotion in heat transfer capacity, mass transfer capacity, material flat push capacity and the like, but due to the limitation of its own structure, dynamic tubular reactor cannot realize multiple reactions at different temperatures or different stages in the same reactor, and dynamic tubular reactor also has back mixing phenomenon in the use process, and it is difficult to realize large flat push and small back mixing effect. SUMMARY

[0003] To solve the above technical problem, the utility model provides a continuous dynamic microreactor, can realize continuous flow process, and has good flat push effect and small back mixing.

[0004] The utility model discloses a technical scheme to realize the above-mentioned purpose:

[0005] A continuous dynamic microreactor, comprising: at least two parallel arranged heat exchangers, two adjacent heat exchangers are connected in series through a mixing chamber and a connecting elbow, and two heat exchangers located on both sides are respectively provided with a feeding chamber and a discharging chamber at one end; A stirrer is arranged in the mixing chamber and the feeding chamber.

[0006] Preferably, the plurality of heat exchangers are arranged vertically and horizontally or horizontally and vertically; more preferably, when the plurality of heat exchangers are arranged horizontally, the plurality of heat exchangers are arranged from bottom to top; when the plurality of heat exchangers are arranged vertically, the feeding chamber is located at the upper end or the lower end of the heat exchanger on one side, and the discharging chamber is located at the upper end of the heat exchanger on the other side.

[0007] Preferably, the heat exchanger is a shell-and-tube heat exchanger or a coiled tube heat exchanger, and the tube side of the plurality of heat exchangers is respectively communicated with the corresponding feeding chamber, mixing chamber, connecting elbow and discharging chamber, and the shell side of the heat exchanger is provided with a heat transfer medium inlet and a heat transfer medium outlet.

[0008] Preferably, one end of the connecting elbow is communicated with the middle part of the mixing chamber, and the other end of the mixing chamber and the feeding chamber away from the heat exchanger is closed by a cover plate.

[0009] Preferably, at least one feeding port is arranged on the feeding chamber and the mixing chamber.

[0010] Preferably, at least one instrument interface is arranged on the feeding chamber and the mixing chamber.

[0011] Preferably, at least one feeding port and / or an instrument interface are arranged on the connecting elbow.

[0012] Preferably, the stirrer comprises a stirring shaft and stirring blades fixed on the stirring shaft, one end of the stirring shaft penetrates through the cover plate of the feeding cavity and the mixing cavity and is connected with the driving motor, and the stirring blades are arranged close to the feeding ports of the feeding cavity and the mixing cavity.

[0013] Preferably, the stirring blades are arranged in at least one group.

[0014] Preferably, the stirring blades are of tooth type, paddle type or turbine type.

[0015] The present application has the following advantages:

[0016] (1) The continuous dynamic micro-reactor provided by the present application can add different reaction materials according to the material adding sequence and the reaction sequence in the reaction process, so that the final product can be obtained through different reactions in multiple stages. Meanwhile, the reaction materials can be added in stages through the feeding ports arranged on the mixing cavity and the connecting elbow, so as to ensure the uniform concentration of the reaction materials in each mixing cavity and heat exchanger, which is beneficial to the stable reaction and the reaction in the direction of high selectivity.

[0017] (2) The continuous dynamic micro-reactor provided by the present application is provided with heat exchangers between each stage of reaction, so that the reaction under different temperature conditions can be carried out in one reactor by passing different temperature heat exchange medium or adjusting the flow of the heat exchange medium in different heat exchangers, and the temperature parameters monitored by the temperature sensor connected through the instrument interface are combined to realize the precise temperature control in stages. Moreover, the heat exchangers are arranged between each stage, the heat exchange area is significantly increased, the reactor has strong heat exchange capacity, the risk of explosion caused by too high temperature in the reactor is reduced, and the reactor is suitable for reactions with large heat release.

[0018] (3) In the continuous dynamic micro-reactor provided by the present application, the reaction materials flow in the heat exchangers at a high flow rate in stages during the reaction, the heat exchangers not only act as heat exchange units, but also act as one-way throttling elements between each stage, which greatly reduces the back mixing of the materials, and is suitable for chemical reactions with high requirements for back mixing.

[0019] (4) The reaction area of the continuous dynamic micro-reactor provided by the present application can be divided into a stirring area in the feeding cavity and the mixing cavity and a heat exchange area in the heat exchanger, the liquid holding capacity of the stirring area accounts for a small proportion, the area of the reaction materials subjected to the shear force of the stirring blades is small, and the reactor is suitable for chemical reactions sensitive to shear.

[0020] (5) The continuous dynamic micro reactor can realize continuous reaction, has high mass transfer and heat transfer efficiency, and can also monitor the temperature, pressure and other parameters in the reaction process through the temperature sensor, pressure sensor and the like connected through the instrument interface during the reaction process, thereby controlling the product quality and ensuring safe production. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings required by the embodiments or the prior art description. Obviously, the drawings described below are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0022] Figure 1 is the overall structure schematic diagram of the reactor of the embodiment 1 of the present application;

[0023] Figure 2 is the structure schematic diagram of the heat exchanger of the embodiment 1 of the present application;

[0024] Figure 3 is the structure schematic diagram of the feeding cavity of the embodiment 1 of the present application;

[0025] Figure 4 is the structure schematic diagram of the mixing cavity and the connecting elbow of the embodiment 1 of the present application;

[0026] Figure 5 is the structure schematic diagram of the stirrer of the embodiment 1 of the present application;

[0027] Figure 6 is the overall structure schematic diagram of the reactor of the embodiment 2 of the present application.

[0028] Marked in the figure: 1, heat exchanger; 101, heat exchange medium inlet; 102, heat exchange medium outlet; 2, mixing cavity; 3, connecting elbow; 4, feeding cavity; 5, discharging cavity; 6, stirrer; 601, stirring shaft; 602, stirring paddle; 7, cover plate; 8, feeding port; 9, instrument interface. DETAILED DESCRIPTION

[0029] The present application provides a continuous dynamic micro reactor, in order to make the purpose, technical scheme and effect of the present application more clear and definite, the present application will be further described in detail. It should be understood that the specific embodiments described herein are only used to explain the present application, and are not used to limit the present application.

[0030] In the description of the utility model, it is understood that the terms "upper", "lower", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as limiting the utility model.

[0031] The utility model will be described in detail below with reference to the drawings:

[0032] Embodiment 1

[0033] Referring to Figure 1 The embodiment provides a continuous dynamic microreactor, comprising:

[0034] The heat exchanger 1 is provided with at least two, and six heat exchangers 1 are arranged from bottom to top and horizontally placed in the embodiment, two adjacent heat exchangers 1 are connected in series through the mixing cavity 2 and the connecting elbow 3, and the heat exchanger 1 is used for transporting reaction materials in stages and carrying out heat exchange to cool the reaction materials;

[0035] The feed cavity 4 is located at one end of the lowermost heat exchanger 1, the reaction materials are preferentially fed from the feed cavity 4, and the liquid holding capacity of the feed cavity 4 and the mixing cavity 2 is less than that of the heat exchanger 1;

[0036] The discharge cavity 5 is located at one end of the uppermost heat exchanger 1, and the reaction materials are discharged from the discharge port of the discharge cavity 5;

[0037] The stirrer 6 is arranged in the feed cavity 4 and the mixing cavity 2 and is used for stirring the reaction materials in the feed cavity 4 and the mixing cavity 2.

[0038] Referring to Figure 2 The heat exchanger 1 is a shell-and-tube heat exchanger, or a coiled tube heat exchanger can also be used. The tube side of the plurality of heat exchangers 1 is communicated with the corresponding feed cavity 4, mixing cavity 2, connecting elbow 3 and discharge cavity 5, which is used for transporting reaction materials. The shell side of the heat exchanger 1 is provided with a heat medium inlet 101 and a heat medium outlet 102, which is used for introducing heat medium to cool the reaction materials in the tube side.

[0039] Referring to Figure 3 The end of the feed cavity 4 away from the heat exchanger 1 is closed by the cover plate 7, and at least one feed port 8 and at least one instrument interface 9 are arranged on the feed cavity 4. The feed port 8 is preferably provided with at least two, which is used for introducing different reaction materials, and the instrument interface 9 is used for connecting temperature sensor and / or pressure sensor to monitor reaction temperature and reaction pressure and the like parameters.

[0040] Referring to Figure 4The connecting elbow 3 is arranged at the middle upper part of the mixing cavity 2, and the end of the mixing cavity 2 away from the heat exchanger 1 is closed by a cover plate 7. In addition, in order to facilitate the connection between the mixing cavity 2 and the connecting elbow 3, an upper connecting pipe is arranged at the middle upper part of the mixing cavity 2, and the lower end of the connecting elbow 3 is fixedly connected with the upper connecting pipe of the middle upper part of the mixing cavity 2, which can be fixedly connected by flanges.

[0041] At least one feeding port 8 for segmented reaction feeding is arranged on the mixing cavity 2, and at least one feeding port 8 for standby of segmented reaction feeding and / or an instrument interface 9 for connecting a temperature sensor and / or a pressure sensor to monitor the reaction temperature and the reaction pressure and the like is arranged on the connecting elbow 3.

[0042] Referring to Figure 5 The stirrer 6 includes a stirring shaft 601 and stirring blades 602 fixed on the stirring shaft 601. One end of the stirring shaft 601 penetrates the cover plate 7 of the feeding cavity 4 and the mixing cavity 2, and the stirring shaft 601 is rotatably connected with the cover plate 7 and forms a seal therebetween. The stirring blades 602 are arranged close to the feeding port 8 of the feeding cavity 4 and the mixing cavity 2, and at least one set of stirring blades 602 is arranged, preferably two sets. The stirring blades 602 are paddle type, and can also be tooth type or turbine type.

[0043] In addition, the stirring shaft 601 of the stirrer 6 is further connected with a driving motor for driving the stirring shaft to rotate. Specifically, each stirrer can be driven by a driving motor independently, or the stirrers on the same side are driven by one driving motor.

[0044] For the mode that a plurality of stirrers are driven to rotate by one driving motor, it can be realized by using the prior art, and thus the embodiment will not be described in detail.

[0045] The working process of the continuous dynamic micro-reactor provided by the embodiment is as follows:

[0046] Firstly, different reaction materials enter the reactor from the feed port of the feed chamber, and the reaction materials are mixed and dispersed by the stirrer in the feed chamber for sufficient mixing and mass transfer, the preliminarily mixed reaction materials enter the tube side of the first-stage heat exchanger at the lowermost end, and at the same time, the heat exchange medium is introduced into the shell side of the heat exchanger, and the heat generated by the reaction of the reaction materials is taken away by the heat exchange through the interwall; then the mixed reaction materials enter the mixing chamber at the other end of the first-stage heat exchanger, and the stirrer in the mixing chamber mixes and disperses the reaction materials again, and then enters the second-stage heat exchanger through the connecting elbow, and is subjected to secondary heat exchange, and the above steps are repeated to gradually mix and gradually heat, until the reaction materials meet the discharge requirements, and then the reaction materials flow out from the discharge chamber. In the above reaction process, if different reaction materials need to be added in stages, after several different reaction materials are introduced into the feed chamber, other reaction materials are added from the feed port of the mixing chamber or the connecting elbow according to the reaction requirements, so that the reaction is realized in stages, that is, different reactions are realized in the same reactor. Moreover, during the working process, the reaction materials flow smoothly along the main flow direction to realize plug flow with little back mixing.

[0047] In addition, in the above working process, temperature sensors, pressure sensors and the like can be connected through instrument interfaces to monitor the reaction parameters, the types, flow rates or temperatures of the heat exchange medium introduced into the heat exchanger are controlled according to the reaction requirements, so that the tube side temperature of each stage of the heat exchanger is controlled, precise temperature control is realized, reactions under different temperature conditions are realized in one reactor, and whether the discharge temperature and the like meet the requirements is judged to control the product quality.

[0048] Embodiment 2

[0049] With reference to Figure 6 The difference between the continuous dynamic microreactor of the embodiment and the embodiment 1 is that the plurality of heat exchangers 1 in the embodiment are arranged left and right and vertically placed, and preferably the feed chamber 4 is located at the upper end or the lower end of the heat exchanger 1 on one side, and the discharge chamber 5 is located at the upper end of the heat exchanger 1 on the other side.

[0050] The continuous dynamic microreactor provided in the embodiment has the problem that the residence time of the reaction materials in the reactor is not uniform at the initial stage of the reaction, that is, there is back mixing, but when the tube side of each stage of the heat exchanger is completely filled with the reaction materials and runs smoothly, the reaction materials flow smoothly along the main flow direction to realize plug flow with little back mixing.

[0051] It should be noted that the parts not described in the utility model can be realized by using or referring to the existing technology.

[0052] Of course, the above description is not a limitation of the utility model, the utility model is also not limited to the above examples, the changes, modifications, additions or replacements made by the person skilled in the art within the essential scope of the utility model should also belong to the protection scope of the utility model.

Claims

1. A continuous dynamic microreactor, characterized in that, The application relates to a heat exchanger. The multiple heat exchangers (1) are arranged in up-down or left-right.

2. The continuous dynamic microreactor according to claim 1, characterized in that The heat exchanger (1) is a column-tube heat exchanger or a winding tube heat exchanger, and the tube passage of the multiple heat exchangers (1) respectively communicates with the corresponding feed cavity (4), mixing cavity (2), connecting elbow (3) and discharge cavity (5), and the shell passage of the heat exchanger (1) is provided with a heat medium inlet (101) and a heat medium outlet (102).

3. The continuous dynamic microreactor according to claim 1, wherein, The connecting elbow (3) is connected with the middle part of the mixing cavity (2) at one end, and the mixing cavity (2) and the feed cavity (4) are closed at the end far from the heat exchanger (1) by a cover plate (7).

4. The continuous dynamic microreactor according to claim 1, wherein At least one feed inlet (8) is arranged on the feed cavity (4) and the mixing cavity (2).

5. The continuous dynamic microreactor according to claim 1, wherein At least one instrument interface (9) is arranged on the feed cavity (4) and the mixing cavity (2).

6. The continuous dynamic microreactor according to claim 1, wherein, At least one feed inlet (8) and / or instrument interface (9) is arranged on the connecting elbow (3).

7. The continuous dynamic microreactor according to claim 1, wherein The stirrer (6) comprises a stirring shaft (601) and stirring blades (602) fixed on the stirring shaft (601), one end of the stirring shaft (601) penetrates through the cover plate (7) of the feed cavity (4) and the mixing cavity (2) and is connected with a driving motor, and the stirring blades (602) are arranged close to the feed inlet (8) of the feed cavity (4) and the mixing cavity (2).

8. The continuous dynamic microreactor according to claim 5, wherein, The stirring blades (602) are provided with at least one group.

9. The continuous dynamic microreactor according to claim 8, characterized in that The stirring blades (602) are of tooth type, paddle type or turbine type.

10. The continuous dynamic microreactor according to claim 8, wherein ​

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