Continuous esterification reactor

Abstract

The utility model provides a continuous esterification reactor. The continuous esterification reactor comprises a feeding structure, a reaction main body and a discharging opening, according to the feeding structure, continuous conveying and premixing of raw materials are achieved through two precise peristaltic pumps and a three-way pipe mixing structure, and mixing efficiency is improved through cooperation of a stirring rod and a three-way pipe. The reaction main body comprises a propeller and a reactor, the propeller continuously conveys materials to the reactor through a spiral propeller shaft, a plurality of catalyst layers are arranged in the reactor to promote reaction, and a heating layer and a heat preservation layer are configured to optimize reaction conditions. Multiple reaction main bodies can be connected in series and are synchronously driven through a transmission shaft. The continuous esterification reaction device realizes continuous and efficient esterification reaction, and has the characteristics of uniform mixing, high catalyst utilization rate and low energy consumption.

Description

TECHNICAL FIELD

[0001] The utility model relates to chemical reaction equipment technical field especially relates to a continuous esterification reactor. BACKGROUND

[0002] Traditional esterification reactor adopts intermittent operation, and has problems of low reaction efficiency, high energy consumption, complicated catalyst replacement and the like. Although the existing continuous reactor can realize continuous feeding, the mixing effect is poor, especially for high-viscosity materials, stratification is prone to occur; the catalyst is usually fixed in a single layer, and the contact is insufficient, and the reaction temperature control is unstable. SUMMARY

[0003] Therefore, the utility model discloses the main purpose is to solve one of the above problems.

[0004] The utility model provides a continuous esterification reactor, include: feed structure, reaction main part, discharge gate, the feed structure includes two material pumps, mixing structure, the mixing structure includes tee bend, motor, stirring rod, the first pipe mouth and the second pipe mouth of tee bend are connected with two material pump's material mouth respectively, the third pipe mouth of tee bend is connected with reaction main part, the motor sets up at the tee bend confluence, the stirring rod sets up in the third pipe mouth in pipe of tee bend, the stirring rod is connected with the drive shaft of motor, reaction main part one end is connected with feed structure, reaction main part other end is connected with discharge gate, and reaction main part includes propeller, reactor, the one end of propeller is connected with mixing structure, the other end of propeller is connected with one end of reactor, and the other end of reactor is connected with discharge gate, wherein, the propeller is used for conveying the raw material after mixing to the reactor, and the reactor is used for providing the reaction place for the raw material after mixing, the propeller includes propulsion cabin, helical propulsion shaft, the helical propulsion shaft sets up in propulsion cabin and is connected with stirring rod, so that the helical propulsion shaft rotates along with stirring rod, and the helical propulsion shaft surface is equipped with continuous helical blade, and the reactor includes reaction cabin, a plurality of catalyst layers, and a plurality of catalyst layers are evenly distributed in the reaction cabin.

[0005] Further, the reaction main part includes a transmission shaft, the transmission shaft is arranged in the reactor, one end of the transmission shaft is connected with the helical propulsion shaft of the propeller, and the other end of the transmission shaft penetrates through a plurality of catalyst layers of the reactor, a plurality of reaction main parts are sequentially connected, the transmission shaft of one reaction main part is connected with the helical propulsion shaft of another reaction main part, and the helical propulsion shaft of a plurality of reaction main parts rotates along with the stirring rod through the transmission shaft.

[0006] Further, the reaction body comprises a screen mesh partition plate, which is arranged at one end of the reactor away from the propeller.

[0007] Further, the reaction body comprises a heating layer, which is arranged inside the reaction cabin.

[0008] Further, the reaction body comprises a heat preservation layer, which is arranged inside the heating layer of the reaction cabin.

[0009] Further, the two material pumps are precision peristaltic pumps.

[0010] The beneficial effects of the present application are as follows:

[0011] The three-way pipe is combined with the motor-driven stirring rod to mix the materials in the conveying process, so that the raw materials are fully mixed, and the uniformity of the reaction is ensured; the connection design of the propeller and the reactor enables the raw materials to continuously enter the reactor, thereby improving the production efficiency; the multiple catalyst layers are uniformly distributed in the reactor, so that the contact time of the materials is prolonged, and the conversion rate is improved. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the continuous esterification reactor of the present application;

[0013] Figure 2 It is a schematic diagram of the feeding structure of the present application;

[0014] Figure 3 It is a schematic diagram of the reaction body of the present application;

[0015] Figure 4 It is a schematic diagram of the propeller of the present application;

[0016] Figure 5 It is a schematic diagram of the reactor of the present application;

[0017] Among them, the above drawings comprise the following reference signs:

[0018] 1, feeding structure; 101, material pump; 102, mixing structure; 1021, three-way pipe; 10211, first pipe opening; 10212, second pipe opening; 10213, third pipe opening; 1022, motor; 1023, stirring rod; 2, reaction body; 201, propeller; 2011, propelling cabin; 2012, spiral propelling shaft; 202, reactor; 2021, reaction cabin; 2022, catalyst layer; 2023, transmission shaft; 2024, screen mesh partition plate; 2025, heating layer; 2026, heat preservation layer; 3, discharge port. DETAILED DESCRIPTION

[0019] The application will be described in further detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the related utility model, and not to limit the utility model. In addition, it should be noted that, for the convenience of description, only the parts related to the utility model are shown in the drawings. It should be noted that, in the case of no conflict, the embodiments in the application and the features in the embodiments can be combined with each other.

[0020] In the description of the utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "horizontal", "inner", "outer" and the like indicate 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 do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model; the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance, in addition, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication between two elements inside. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances. The application will be described in detail below with reference to the drawings and embodiments.

[0021] As Figure 1 shown, the preferred embodiment of the utility model, a continuous esterification reactor, comprising: feed structure 1, reaction body 2, discharge port 3;

[0022] As Figure 2As shown in the figure, the feeding structure 1 includes two material pumps 101, a mixing structure 102; the mixing structure 102 includes a three-way pipe 1021, a motor 1022, a stirring rod 1023, the first pipe opening 10211 and the second pipe opening 10212 of the three-way pipe 1021 are connected with the material outlet of the two material pumps 101 respectively, the third pipe opening 10213 of the three-way pipe 1021 is connected with the reaction main body 2, the motor 1022 is arranged at the intersection of the three-way pipe 1021, the stirring rod 1023 is arranged in the pipe where the third pipe opening 10213 of the three-way pipe 1021 is located, and the stirring rod 1023 is connected with the driving shaft of the motor 1022; the three-way pipe 1021 serves as a converging channel of two raw materials, and the raw materials are transported to the reaction main body 2 after preliminary mixing; the stirring rod 1023 and the motor 1022 forcibly stir the raw materials at the intersection of the three-way pipe 1021, break the stratification of the raw materials, realize pre-homogenization of high-viscosity or difficult-miscible materials, avoid local concentration unevenness in the reaction main body 2, and shorten the subsequent reaction time;

[0023] As shown in the figure, Figure 3 The reaction main body 2 is connected with the feeding structure 1 at one end, and is connected with the discharge port 3 at the other end, and the reaction main body 2 includes a propeller 201 and a reactor 202; one end of the propeller 201 is connected with the mixing structure 102, the other end of the propeller 201 is connected with one end of the reactor 202, and the other end of the reactor 202 is connected with the discharge port 3; wherein the propeller 201 is used for transporting the mixed raw materials to the reactor 202, and the reactor 202 is used for providing a reaction place for the mixed raw materials;

[0024] As shown in the figure, Figure 4 The propeller 201 includes a propeller cabin 2011 and a spiral propeller shaft 2012; the spiral propeller shaft 2012 is arranged in the propeller cabin 2011 and is connected with the stirring rod 1023, so that the spiral propeller shaft 2012 rotates together with the stirring rod 1023, and the surface of the spiral propeller shaft 2012 is provided with continuous spiral blades; the spiral propeller shaft 2012 is mechanically linked with the stirring rod 1023, and the raw materials are moved to the reactor 202 by rotating the propeller, without the need for additional motor secondary driving; the continuous spiral blade design realizes non-intermittent conveying, avoiding the efficiency bottleneck of traditional intermittent reactors.

[0025] As shown in the figure, Figure 5 The reactor 202 includes a reaction cabin 2021 and a plurality of catalyst layers 2022; the plurality of catalyst layers 2022 are uniformly distributed in the reaction cabin 2021. The reaction cabin 2021 provides the space and reaction conditions required for esterification reaction; the multiple layers of uniformly distributed catalyst layers 2022 prolong the contact time of the materials, improve the catalytic efficiency, and reduce the residue of unreacted materials.

[0026] As a preferred embodiment of the utility model, the following additional technical features can also be provided:

[0027] As shown in Figure 3 and Figure 5 , in a preferred embodiment, the reaction body 2 comprises a transmission shaft 2023, which is arranged in the reactor 202, one end of the transmission shaft 2023 is connected with the helical propeller shaft 2012 of the propeller 201, and the other end of the transmission shaft 2023 penetrates through the catalyst layer 2022 of the reactor 202;

[0028] The reaction body 2 is provided with a plurality of and is connected in sequence; the transmission shaft 2023 of one reaction body 2 is connected with the helical propeller shaft 2012 of another reaction body 2, and the helical propeller shaft 2012 of the plurality of reaction bodies 2 is made to rotate together with the stirring rod 1023 through the transmission shaft 2023. The transmission shaft 2023 can connect the helical propeller shafts of adjacent reaction bodies, transmit power, realize synchronous driving of multiple reaction bodies in series, and expand the production scale without increasing the motor step by step, thereby reducing the cost.

[0029] As shown in Figure 5 , in a preferred embodiment, the reaction body 2 comprises a screen partition 2024, which is arranged at one end of the reactor 202 away from the propeller 201, separates the product from the catalyst particles, prevents the catalyst from being discharged with the product, prolongs the service life of the catalyst, and reduces the burden of the subsequent separation process.

[0030] As shown in Figure 5 , in a preferred embodiment, the reaction body 2 comprises a heating layer 2025, which is arranged inside the reaction chamber 2021 to provide the required temperature for the reaction.

[0031] As shown in Figure 5 , in a preferred embodiment, the reaction body 2 comprises a heat preservation layer 2026, which is arranged inside the heating layer 2025 of the reaction chamber 2021 to reduce heat loss.

[0032] The combination of the heating layer 2025 and the heat preservation layer 2026 can achieve precise and stable temperature control, avoid local overheating or reaction stagnation, reduce external heat loss, and achieve significant energy saving effect, which is especially suitable for high-temperature esterification reactions.

[0033] In a preferred embodiment, the two material pumps 101 are precision peristaltic pumps; as a preferred type of material pump, the precision peristaltic pump can accurately control the flow of raw materials, solve the pulsation problem of traditional gear pumps for high-viscosity materials, improve the stability of feeding, and is especially suitable for precise proportioning reactions. In a preferred embodiment, the two material pumps 101 are precision peristaltic pumps; as a preferred type of material pump, the precision peristaltic pump can accurately control the flow of raw materials, solve the pulsation problem of traditional gear pumps for high-viscosity materials, improve the stability of feeding, and is especially suitable for precise proportioning reactions.

[0034] The basic principle and main features of the present application and the advantages of the present application are shown and described above. Those skilled in the art should understand that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A continuous esterification reactor characterized by, The utility model relates to a continuous esterification reactor, which comprises a feeding structure (1), a reaction main body (2) and a discharge port (3). The feeding structure (1) comprises two material pumps (101) and a mixing structure (102). The mixing structure (102) comprises a tee (1021), a motor (1022) and a stirring rod (1023). The first pipe opening (10211) and the second pipe opening (10212) of the tee (1021) are respectively connected to the material conveying ports of the two material pumps (101). The third pipe opening (10213) of the tee (1021) is connected to the reaction main body (2). The motor (1022) is arranged at the intersection of the tee (1021). The stirring rod (1023) is arranged in the pipe of the tee (1021) where the third pipe opening (10213) is located. The stirring rod (1023) is connected to the driving shaft of the motor (1022). The reaction main body (2) is connected to the feeding structure (1) at one end and connected to the discharge port (3) at the other end. The reaction main body (2) comprises a propeller (201) and a reactor (202). One end of the propeller (201) is connected to the mixing structure (102). The other end of the propeller (201) is connected to one end of the reactor (202). The other end of the reactor (202) is connected to the discharge port (3). The propeller (201) is used to deliver the mixed raw materials to the reactor (202). The reactor (202) is used to provide a reaction site for the mixed raw materials. The propeller (201) comprises a propelling cabin (2011) and a helical propelling shaft (2012). The helical propelling shaft (2012) is arranged in the propelling cabin (2011) and connected to the stirring rod (1023), so that the helical propelling shaft (2012) rotates together with the stirring rod (1023). The surface of the helical propelling shaft (2012) is provided with continuous helical blades. The reactor (202) comprises a reaction cabin (2021) and a plurality of catalyst layers (2022). The plurality of catalyst layers (2022) are uniformly distributed in the reaction cabin (2021).

2. The continuous esterification reactor according to claim 1, wherein the reaction main body (2) comprises a transmission shaft (2023). The transmission shaft (2023) is arranged in the reactor (202). One end of the transmission shaft (2023) is connected to the helical propelling shaft (2012) of the propeller (201). The other end of the transmission shaft (2023) penetrates through the plurality of catalyst layers (2022) of the reactor (202). ​ ​ The reaction body (2) is provided with several and is connected in turn; the transmission shaft (2023) of one reaction body (2) is connected with the spiral propelling shaft (2012) of another reaction body (2), and the spiral propelling shaft (2012) of several reaction bodies (2) is made to rotate with the stirring rod (1023) through the transmission shaft (2023).

3. The continuous esterification reactor according to claim 1, characterized in that, The reaction body (2) comprises a screen partition (2024), which is arranged at one end of the reactor (202) away from the propeller (201).

4. The continuous esterification reactor according to claim 1, characterized in that The reaction body (2) comprises a heating layer (2025), which is arranged inside the reaction chamber (2021).

5. The continuous esterification reactor according to claim 4, characterized in that, The reaction body (2) comprises a heat preservation layer (2026), which is arranged inside the heating layer (2025) of the reaction chamber (2021).

6. The continuous esterification reactor according to claim 1, characterized in that, The two material pumps (101) are both precision peristaltic pumps.

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