Reaction kettle for esterification reaction of acrylate

Abstract

The invention discloses a reaction kettle for acrylate esterification reaction, and relates to the technical field of reaction kettles.The reaction kettle comprises a reaction kettle body, a stirring mechanism is arranged on the upper portion in the reaction kettle body, the stirring mechanism comprises a center shaft, a corner bracket and an inner cylinder, and the upper end of the center shaft is rotatably arranged at the center of the upper portion in the reaction kettle body; the upper end of the center shaft is driven by a first motor to rotate, the corner bracket is adjustably arranged at the lower end of the center shaft, the lower end of the corner bracket is assembled and connected with the inner cylinder, fan blades are rotatably arranged in the inner cylinder and comprise a fixing shaft and blades, the multiple blades are arranged on the outer wall of the fixing shaft in an angle-adjustable mode, and the end face of the fixing shaft is driven by a second motor to rotate. A discharging hole and a feeding hole are respectively formed in the upper end and the lower end of the inner cylinder, a feeding interlayer is arranged on the outer wall of the reaction kettle body, and a spiral pipe is arranged in the feeding interlayer. The first heating pipe is used for preheating during feeding, and the second heating pipe in the inner barrel is used for heating materials during stirring, so that the heating is more uniform, and the reaction quality is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of reaction kettles, and in particular to a reaction kettle for acrylate esterification reaction. Background Art

[0002] The general understanding of a reaction kettle is a container for physical or chemical reactions. Through the structural design and parameter configuration of the container, functions such as heating, evaporation, cooling, and mixing at low and high speeds required by the process are achieved; a reaction kettle is used in the acrylate esterification reaction. The esterification reaction is a type of organic chemical reaction, which is the reaction of an alcohol with a carboxylic acid or an oxygen-containing inorganic acid to form an ester and water. It is divided into three categories: the reaction of a carboxylic acid with an alcohol, the reaction of an inorganic oxygen-containing acid with an alcohol, and the reaction of an inorganic strong acid with an alcohol. The esterification reaction of a carboxylic acid with an alcohol is reversible and generally proceeds very slowly, so concentrated sulfuric acid is commonly used as a catalyst. When a polycarboxylic acid reacts with an alcohol, multiple esters can be formed;

[0003] For example, a reaction kettle for acrylate esterification reaction in "CN117258725A" includes a frame and a stirring frame. The stirring frame is driven by a motor to rotate. An auxiliary plate is rotatably connected to the inner surface of the stirring frame. A cleaning component is fixedly connected to the bottom of the stirring frame. A treatment cylinder is fixedly connected to the outer surface of the cleaning component. A transition component is fixedly connected to the position of the treatment cylinder close to the cleaning component. A heater is provided at the position of the treatment cylinder close to the transition component. The outer surface of the treatment cylinder is fixedly connected to the frame. A clean gas component is fixedly connected to the top of the frame. The present invention relates to the technical field of reaction kettles. This reaction kettle for acrylate esterification reaction prevents the temperature of the treatment cylinder from being too high or too low during the reaction, rotates the auxiliary plate to clean the impurities adhering to the stirring frame, avoids the adhesion of raw materials during the stirring process of the stirring frame from affecting the reaction quality, and avoids the influence caused by the odor contained in the gas discharged from the treatment cylinder;

[0004] However, in the prior art, some by-products of the esterification reaction have a certain viscosity and are easily deposited at the bottom of the reaction kettle, forming a local dead zone, which affects the subsequent reaction. Moreover, the liquid flow field formed by stirring is mainly radial flow and the axial circulation is weak, which easily leads to uneven temperature distribution, thus easily forming problems such as local overheating or incomplete reaction, affecting the product purity and yield. Summary of the Invention

[0005] In view of the above existing problems, the present invention is proposed.

[0006] The purpose of the present invention is to solve the problem of uneven liquid temperature easily occurring during stirring in the prior art.

[0007] To solve the above technical problems, the present invention provides the following technical solutions:

[0008] On the one hand, the present invention provides a reaction kettle for acrylate esterification reaction, which comprises a reaction kettle body. Above the interior of the reaction kettle body, there is a stirring mechanism, which includes a central shaft, an angle bracket and an inner cylinder. The upper end of the central shaft is rotatably arranged at the central position above the interior of the reaction kettle body, and the upper end of the central shaft is driven to rotate by a first motor. The angle bracket is adjustably arranged at the lower end of the central shaft and is assembled and connected to the inner cylinder at the lower end. Inside the inner cylinder, there is a rotating fan blade, which includes a fixed shaft and blades. There are multiple blades, and the angles of the blades are adjustably arranged on the outer wall of the fixed shaft. The end face of the fixed shaft is driven to rotate by a second motor. An outlet and an inlet are respectively arranged at the upper end and the lower end of the inner cylinder. On the outer wall of the reaction kettle body, there is a feeding interlayer, and inside the feeding interlayer, there is a spiral tube. Inside the side wall of the reaction kettle body, there is a first heating tube.

[0009] Further, the spiral tube has a structure of feeding from the lower end and discharging from the upper end. The upper end of the spiral tube extends into the interior of the reaction kettle body and is communicated with the interior of the reaction kettle body. Inside the side wall of the reaction kettle body, there is a heating interlayer. The first heating tube is spirally laid in the heating interlayer. The side walls of the heating interlayer are respectively attached to the spiral tube and the inner wall of the reaction kettle body through heat conduction sheets. By feeding the material through the spiral tube, during the feeding process, the first heating tube is electrically connected to an external power supply to achieve heating. The first heating tube can be a quartz tube. The heat of the first heating tube can heat the spiral tube through the heat conduction sheet, and when the material passes through, the material is preheated. Preheating can enable the reactants to quickly reach the activation temperature, shorten the reaction start time period, and improve the production capacity utilization rate of the device. The preheated material is directly discharged from the spiral tube into the interior of the reaction kettle body.

[0010] Further, the interior of the lower end of the central shaft is a hollow structure, and a waterproof cylinder is arranged at the lower end. The upper end of the angle bracket is hermetically and slidably arranged inside the lower end of the central shaft, and the lower end of the waterproof cylinder is assembled and connected to the angle bracket. By driving the waterproof cylinder, the angle bracket can be driven to lift, so as to achieve the effect of lifting the inner cylinder, making the stirring more accurate.

[0011] Further, the second motor is arranged outside the upper end of the inner cylinder. The output end of the second motor is linked with the fixed shaft. The end face of the fixed shaft is assembled and connected to the inner wall of the inner cylinder through a bracket. Inside the side wall of the inner cylinder, there is a second heating tube. Above the inner cylinder, there is a waterproof battery. The second heating tube is powered by the waterproof battery. By driving the second motor to drive the fan blade to rotate, the fan blade is inclined and the edge is slidably adapted to the inner wall of the inner cylinder. When the fan blade rotates at a high speed, a low-pressure area and a high-pressure area will be formed around the blade. The liquid is sucked from the lower low-pressure area and pushed up along the surface of the blade to the upper high-pressure area, realizing the conversion of the forced flow direction, and finally discharging from the upper end.

[0012] Further, a conical support is threadedly installed on the outer wall of the feed inlet at the lower end of the inner cylinder. The small-diameter end of the conical support is assembled and connected to the feed inlet. A plurality of guide ribs are provided below the conical support. Through the cooperation of the conical support and the guide ribs, the function of quickly introducing materials into the feed inlet can be achieved.

[0013] Further, there are two fan blades, and the two fixed shafts are linked up and down. The discharge port is opened on the inner cylinder on the side of the upper fan blade. A discharge pipe is connected to the inner cylinder at the discharge port. The discharge pipe is arranged obliquely upward. The lower fan blade is responsible for suction, and the upper fan blade is responsible for discharge, which improves the flow velocity and thrust of the liquid in the inner cylinder, strengthens the up and down circulation of the reactor body. In addition, the double-fan blade structure can adjust the suction and discharge rhythm, make the flow continuous and smooth, and reduce backflow. Through the arranged discharge pipe, the spraying range of the discharged liquid can be increased, and the mixing uniformity of the mixed materials can be increased.

[0014] Further, one side of the blade near the fixed shaft is rotatably connected to the fixed shaft through a positioning shaft, and the other side of the same end is slidably connected to the fixed shaft through a slider. The slider is driven to slide by an adjusting mechanism. By rotating the blade around the positioning shaft, the change of the inclination angle can be realized.

[0015] Further, the adjusting mechanism is arranged on the upper fan blade. The adjusting mechanism includes a fixed frame, a lead screw and a slide rod. The fixed frame is fixedly arranged on the end face of the fixed shaft. The lower end of the slide rod is rotatably connected to the slider. The upper end of the slide rod slidably penetrates through the fixed frame and is provided with a fixed ring. A waterproof motor is arranged at the upper end of the fixed shaft. The lead screw is vertically threaded through the fixed ring. The lead screw is driven to rotate by the waterproof motor. An expansion rod is arranged between the fixed ring and the upper end of the inner cylinder. A waterproof cover is arranged at the upper end of the inner cylinder. The waterproof motor drives the lead screw to rotate, thereby driving the fixed ring to move up and down, and then driving all the slide rods to slide up and down, realizing the adjustment of the up and down position of the slider. When the slider moves up, its position tends to be in the same plane as the positioning shaft, and vice versa, the inclination range is larger.

[0016] Further, an arc-shaped groove is arranged on the side wall of the fixed shaft. The slider is slidably arranged in the arc-shaped groove. A through groove is arranged on the fixed frame. The slide rod is vertically slidably arranged in the through groove. The length of the through groove is adapted to the horizontal movement range of the slider. The blades on the lower fan blade and the upper blade are hinged through a connecting shaft. Through the arranged through groove, when the slide rod slides in the through groove, it can realize simultaneous horizontal and vertical sliding, adapting to the movement track of the slider. Through the arranged connecting shaft, when the blade angle of the upper fan blade is adjusted, the lower blade also rotates accordingly.

[0017] Furthermore, a plurality of stirring blades are provided on the outer wall of the inner cylinder. The stirring blades are inclined and coated with an anti-sticking coating on the surface. The liquid outside the inner cylinder can be driven to stir by the provided stirring blades, expanding the disturbance range.

[0018] The beneficial effects of the present invention are as follows:

[0019] 1. In the present invention, by arranging rotatable fan blades in the inner cylinder, the liquid at the bottom of the kettle can be sucked from bottom to top and axially pushed to flow, forming a stable internal circulation flow field, significantly enhancing the axial disturbance ability, effectively avoiding the problem of insufficient axial flow in the traditional radial stirring mode, improving the uneven temperature in the kettle, and reducing the risk of local overheating. In addition, the preheating of the feeding by the first heating pipe and the heating of the material by the second heating pipe in the inner cylinder during stirring both make the heating more uniform and improve the reaction quality.

[0020] 2. The present invention can dynamically adjust the angle and position of the fan blades to achieve adaptive control of materials with different viscosities, and improve the stability and reaction control accuracy of the stirring system during the whole reaction process.

[0021] 3. The double-fan blade structure of the present invention can adjust the discharge and suction rhythm, make the flow continuous and smooth, reduce backflow, and increase the spraying range of the discharged liquid through the provided discharge pipe, increasing the mixing uniformity of the mixed materials.

[0022] 4. Through the cooperation of the provided conical support and guide ribs, the present invention can quickly introduce the material into the feed port. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0024] Figure 1 It is a schematic diagram of the internal structure of a reaction kettle for acrylic ester esterification reaction provided by the present invention;

[0025] Figure 2 It is a schematic diagram of the side wall structure of the reaction kettle body of a reaction kettle for acrylic ester esterification reaction provided by the present invention;

[0026] Figure 3 It is a reaction kettle for acrylic ester esterification reaction provided by the present invention Figure 2 The enlarged schematic diagram of the structure at A;

[0027] Figure 4 It is a schematic diagram of the stirring mechanism of a reaction kettle for acrylic ester esterification reaction provided by the present invention;

[0028] Figure 5 Schematic diagram of the inner cylinder of a reaction kettle for acrylate esterification reaction provided by the present invention;

[0029] Figure 6 For a day of the internal structure of the inner cylinder of a reaction kettle for acrylate esterification reaction provided by the present invention;

[0030] Figure 7 Schematic diagram of the fan blade structure of a reaction kettle for acrylate esterification reaction provided by the present invention;

[0031] Figure 8 Schematic diagram of the adjusting mechanism of a reaction kettle for acrylate esterification reaction provided by the present invention;

[0032] Figure 9 Schematic diagram of the blade of a reaction kettle for acrylate esterification reaction provided by the present invention.

[0033] Legend:

[0034] 1. Reaction kettle body; 211. Central shaft; 212. Angle bracket; 213. Inner cylinder; 214. First motor; 215. Fan blade; 2151. Fixed shaft; 2152. Blade; 216. Second motor; 217. Discharge port; 218. Feed port; 3. Feeding interlayer; 4. Spiral tube; 5. First heating tube; 611. Heating interlayer; 612. Heat conducting sheet; 7. Waterproof cylinder; 811. Bracket; 812. Second heating tube; 813. Waterproof battery; 911. Conical support; 912. Flow guiding rib; 10. Discharge pipe; 111. Positioning shaft; 112. Slide block; 121. Fixed frame; 122. Lead screw; 124. Slide bar; 125. Fixed ring; 127. Waterproof motor; 128. Expansion rod; 129. Waterproof cover; 131. Arc groove; 132. Through groove; 133. Connecting shaft; 14. Stirring blade. Detailed implementation manners

[0035] In order to make the above objects, features and advantages of the present invention more obvious and understandable, the following detailed description of the specific implementation manners of the present invention will be given with reference to the accompanying drawings of the specification.

[0036] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described herein. Those skilled in the art can make similar promotions without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0037] Secondly, as used herein, "an embodiment" or "embodiments" refer to specific features, structures, or characteristics that may be included in at least one implementation of the present invention. The phrase "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor is it an individual or alternative embodiment that is mutually exclusive with other embodiments.

[0038] Please refer to Figures 1-9 , the present invention provides a technical solution: a reaction kettle for acrylate esterification reaction, comprising a reaction kettle body 1. Above the interior of the reaction kettle body 1, there is a stirring mechanism, which includes a central shaft 211, a corner bracket 212, and an inner cylinder 213. The upper end of the central shaft 211 is rotatably arranged at the central position above the interior of the reaction kettle body 1, and the upper end of the central shaft 211 is driven to rotate by a first motor 214. The corner bracket 212 is adjustably arranged at the lower end of the central shaft 211 and is assembled and connected to the inner cylinder 213 at the lower end. Inside the inner cylinder 213, there is a rotating fan blade 215, which includes a fixed shaft 2151 and blades 2152. There are multiple blades 2152, and their angles are adjustably arranged on the outer wall of the fixed shaft 2151. The end face of the fixed shaft 2151 is driven to rotate by a second motor 216. The upper end and the lower end of the inner cylinder 213 are respectively provided with a discharge port 217 and a feed port 218. On the outer wall of the reaction kettle body 1, there is a feeding interlayer 3, and inside the feeding interlayer 3, there is a spiral tube 4. Inside the side wall of the reaction kettle body 1, there is a first heating tube 5.

[0039] As Figures 1-9 shown, the spiral tube 4 has a structure of feeding from the lower end and discharging from the upper end. The upper end of the spiral tube 4 extends into the interior of the reaction kettle body 1 and is communicated with the interior of the reaction kettle body 1. Inside the side wall of the reaction kettle body 1, there is a heating interlayer 611. The first heating tube 5 is spirally laid in the heating interlayer 611. The side walls of the heating interlayer 611 are respectively attached to the spiral tube 4 and the inner wall of the reaction kettle body 1 through heat conducting sheets 612. By feeding the material into the spiral tube 4, during the feeding process, the first heating tube 5 is electrically connected to an external power source to achieve heating. The first heating tube 5 can be a quartz tube. The heat of the first heating tube 5 can heat the spiral tube 4 through the heat conducting sheet 612, and when the material passes through, it can preheat the material. Preheating can enable the reactants to quickly reach the activation temperature, shorten the reaction start-up time period, and improve the production capacity utilization rate of the device. The preheated material is directly discharged from the spiral tube 4 into the interior of the reaction kettle body 1.

[0040] As Figures 1-9 shown, the lower end interior of the central shaft 211 is a hollow structure, and a waterproof cylinder 7 is provided at the lower end. The upper end of the corner bracket 212 is hermetically and slidably arranged inside the lower end of the central shaft 211. The lower end of the waterproof cylinder 7 is assembled and connected to the corner bracket 212. By driving the waterproof cylinder 7, the corner bracket 212 can be driven to lift, thereby achieving the effect of lifting the inner cylinder 213 and making the stirring more precise.

[0041] AsFigures 1-9 As shown in the figure, the second motor 216 is arranged outside the upper end of the inner cylinder 213. The output end of the second motor 216 is linked with the fixed shaft 2151. The end face of the fixed shaft 2151 is assembled and connected with the inner wall of the inner cylinder 213 through the bracket 811. A second heating pipe 812 is arranged inside the side wall of the inner cylinder 213. A waterproof battery 813 is arranged above the inner cylinder 213. The second heating pipe 812 is powered by the waterproof battery 813. By driving the second motor 216, the fan blade 215 rotates. The fan blade 215 is inclined and the edge thereof is slidably adapted to the inner wall of the inner cylinder 213. When the fan blade 215 rotates at a high speed, a low-pressure area and a high-pressure area will be formed around the blade 2152. The liquid is sucked from the lower low-pressure area, pushed upward along the surface of the blade 2152 to the upper high-pressure area, realizing the conversion of the forced flow direction, and finally discharged from the upper end.

[0042] As Figures 1-9 shown in the figure, a conical support 911 is installed on the outer wall of the feed inlet 218 at the lower end of the inner cylinder 213 by means of thread. The small-diameter end of the conical support 911 is assembled and connected with the feed inlet 218. A plurality of guide ribs 912 are arranged below the conical support 911. Through the cooperation of the arranged conical support 911 and the guide ribs 912, the function of quickly introducing the material into the feed inlet 218 can be achieved.

[0043] As Figures 1-9 shown in the figure, there are two fan blades 215 and the two fixed shafts 2151 are linked up and down. The discharge port 217 is opened on the inner cylinder 213 on the side of the upper fan blade 215. A discharge pipe 10 is connected to the inner cylinder 213 at the discharge port 217. The discharge pipe 10 is arranged obliquely upward. The lower fan blade 215 is responsible for suction, and the upper fan blade 215 is responsible for discharge, improving the flow velocity and thrust of the liquid in the inner cylinder 213, strengthening the up-and-down circulation of the reaction kettle body 1. In addition, the double-fan blade 215 structure can adjust the suction and discharge rhythm, making the flow continuous and smooth, reducing the backflow. By arranging the discharge pipe 10, the spraying range of the discharged liquid can be increased, and the mixing uniformity of the mixed material can be increased.

[0044] As Figures 1-9 shown in the figure, one side of the blade 2152 near one end of the fixed shaft 2151 is rotationally connected with the fixed shaft 2151 through the positioning shaft 111, and the other side of the same end is slidably connected with the fixed shaft 2151 through the slider 112. The slider 112 is driven to slide by the adjusting mechanism. By rotating the blade 2152 around the positioning shaft 111, the change of the inclination angle can be realized.

[0045] As Figures 1-9As shown in the figure, the adjusting mechanism is arranged on the upper fan blade 215. The adjusting mechanism includes a fixed frame 121, a lead screw 122 and a slide bar 124. The fixed frame 121 is fixedly arranged on the end face of the fixed shaft 2151. The lower end of the slide bar 124 is rotatably connected to the slider 112. The upper end of the slide bar 124 slidably penetrates through the fixed frame 121 and is provided with a fixed ring 125. A waterproof motor 127 is arranged at the upper end of the fixed shaft 2151. The lead screw 122 is vertically threaded through the fixed ring 125. The lead screw 122 is driven to rotate by the waterproof motor 127. An expansion rod 128 is arranged between the fixed ring 125 and the upper end of the inner cylinder 213. A waterproof cover 129 is arranged at the upper end of the inner cylinder 213. The waterproof motor 127 drives the lead screw 122 to rotate, thereby driving the fixed ring 125 to move up and down, and further driving all the slide bars 124 to slide up and down, so as to realize the adjustment of the up and down position of the slider 112. When the slider 112 moves up, its position tends to be on the same plane as the positioning shaft 111. Otherwise, the inclination range is relatively large.

[0046] As Figures 1-9 shown in the figure, an arc-shaped groove 131 is provided on the side wall of the fixed shaft 2151. The slider 112 is slidably arranged in the arc-shaped groove 131. A through groove 132 is provided on the fixed frame 121. The slide bar 124 is vertically slidably arranged in the through groove 132. The length of the through groove 132 is adapted to the lateral movement range of the slider 112. The blades 2152 on the lower fan blade 215 and the upper blades 2152 are hinged through a connecting shaft 133. Through the provided through groove 132, when the slide bar 124 slides in the through groove 132, it can realize simultaneous horizontal and vertical sliding, adapting to the movement track of the slider 112. Through the provided connecting shaft 133, when the angle of the blade 2152 of the upper fan blade 215 is adjusted, the lower blade 2152 also rotates accordingly.

[0047] As Figures 1-9 shown in the figure, a plurality of stirring blades 14 are provided on the outer wall of the inner cylinder 213. The stirring blades 14 are inclined and an anti-adhesion coating is applied on the surface. Through the provided stirring blades 14, the liquid outside the inner cylinder 213 can be driven to stir, expanding the disturbance range.

[0048] Working principle: The feeding device introduces raw materials from the lower end of the spiral tube 4 into the reaction kettle body 1 through a pump and discharges them from the upper end. When passing through the spiral tube 4, the material is preheated by the first heating tube 5. After entering the reaction kettle body 1, the first motor 214 is driven to drive the central shaft 211 to rotate, and then drive the angle bracket 212 and the inner cylinder 213 below it to rotate. Since the angle bracket 212 is in an inclined state with the central shaft 211, the inner cylinder 213 can rotate in a circle below the reaction kettle body 1, resulting in a larger stirring range. During the specific stirring process, the second motor 216 is driven to drive the fan blade 215 to rotate. The fan blade 215 can draw the material in the reaction kettle body 1 from below the inner cylinder 213 and discharge it from above, realizing circulation. And a second heating tube 812 is provided inside the inner cylinder 213, and the material is also heated when passing through the inner cylinder 213. Cooperating with the first heating tube 5, the heating speed of the material can be effectively increased. At the same time, the materials at the center and the edge inside the reaction kettle body 1 are heated, making the heating more uniform and improving the reaction quality. And the viscosity of the material is slightly different in the different stages of the pre-reaction and post-reaction. At this time, the angle of the blades 2152 on the fan blade 215 can be adjusted. That is, when the angles of adjacent blades 2152 tend to be parallel, the flow rate of the material passing through is less, but the local shear force is enhanced, which is beneficial to demulsification, emulsification and initial mixing uniformity. On the contrary, the up-and-down circulation of the material in the inner cylinder 213 can be increased, which is suitable for high-concentration materials, so that the liquid is quickly ejected upward after being drawn in from the bottom of the kettle, maintaining the circulation flow and avoiding material retention. After the reaction is completed, the material is discharged from the bottom of the reaction kettle body 1.

[0049] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not restrictive. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A reactor for acrylate esterification reaction, comprising a reactor body (1), wherein a stirring mechanism is arranged above the interior of the reactor body (1), and it is characterized in that: The stirring mechanism includes a central shaft (211), an angle bracket (212) and an inner cylinder (213). The upper end of the central shaft (211) is rotatably arranged at the central position above the inside of the reaction kettle body (1). The upper end of the central shaft (211) is driven to rotate by a first motor (214). The angle bracket (212) is adjustably arranged at the lower end of the central shaft (211) and the lower end is assembled and connected with the inner cylinder (213). A fan blade (215) is rotatably arranged inside the inner cylinder (213). The fan blade (215) includes a fixed shaft (2151) and blades (2152). A plurality of blades (2152) are provided and the angles are adjustably arranged on the outer wall of the fixed shaft (2151). The end face of the fixed shaft (2151) is driven to rotate by a second motor (216). The upper end and the lower end of the inner cylinder (213) are respectively provided with a discharge port (217) and a feed port (218). The outer wall of the reaction kettle body (1) is provided with a feeding interlayer (3). A spiral tube (4) is arranged inside the feeding interlayer (3). A first heating tube (5) is arranged inside the side wall of the reaction kettle body (1).

2. The reactor for acrylate esterification reaction according to claim 1, characterized in that, The spiral tube (4) has a structure of feeding from the lower end and discharging from the upper end. The upper end of the spiral tube (4) extends into the inside of the reaction kettle body (1) and is communicated with the inside of the reaction kettle body (1). A heating interlayer (611) is arranged inside the side wall of the reaction kettle body (1). The first heating tube (5) is spirally laid inside the heating interlayer (611). The side walls of the heating interlayer (611) are respectively attached to the spiral tube (4) and the inner wall of the reaction kettle body (1) through heat conducting sheets (612).

3. A reactor for acrylate esterification reaction according to claim 2, characterized in that, The lower end inside of the central shaft (211) is of a hollow structure and a waterproof cylinder (7) is arranged at the lower end. The upper end of the angle bracket (212) is hermetically and slidably arranged inside the lower end of the central shaft (211). The lower end of the waterproof cylinder (7) is assembled and connected with the angle bracket (212).

4. A reactor for acrylate esterification reaction according to claim 3, characterized in that, The second motor (216) is arranged outside the upper end of the inner cylinder (213). The output end of the second motor (216) is linked with the fixed shaft (2151). The end face of the fixed shaft (2151) is assembled and connected with the inner wall of the inner cylinder (213) through a bracket (811). A second heating tube (812) is arranged inside the side wall of the inner cylinder (213). A waterproof battery (813) is arranged above the inner cylinder (213). The second heating tube (812) is powered by the waterproof battery (813).

5. A reactor for acrylate esterification reaction according to claim 4, characterized in that, A conical support (911) is threadedly installed on the outer wall of the feed port (218) at the lower end of the inner cylinder (213). The small diameter end of the conical support (911) is assembled and connected with the feed port (218). A plurality of diversion ribs (912) are arranged below the conical support (911).

6. The reactor for acrylate esterification reaction according to claim 5, characterized in that, Two fan blades (215) are provided and the two fixed shafts (2151) are linked up and down. The discharge port (217) is opened on the inner cylinder (213) on the side of the upper fan blade (215). A discharge pipe (10) is connected to the inner cylinder (213) at the discharge port (217). The discharge pipe (10) is arranged obliquely upward.

7. A reactor for acrylate esterification reaction according to claim 6, characterized in that, One side of one end of the blade (2152) close to the fixed shaft (2151) is rotationally connected to the fixed shaft (2151) through a positioning shaft (111), and the other side of the same end is slidably connected to the fixed shaft (2151) through a slider (112), and the slider (112) is driven to slide by an adjusting mechanism.

8. A reactor for acrylate esterification reaction according to claim 7, characterized in that, The adjusting mechanism is arranged on the upper one of the fan blades (215). The adjusting mechanism includes a fixed frame (121), a lead screw (122) and a slide bar (124). The fixed frame (121) is fixedly arranged on the end face of the fixed shaft (2151). The lower end of the slide bar (124) is rotationally connected to the slider (112). The upper end of the slide bar (124) slidably penetrates through the fixed frame (121) and is provided with a fixing ring (125). A waterproof motor (127) is arranged at the upper end of the fixed shaft (2151). The lead screw (122) is vertically threaded through the fixing ring (125). The lead screw (122) is driven to rotate by the waterproof motor (127). An expansion rod (128) is arranged between the fixing ring (125) and the upper end of the inner cylinder (213). A waterproof cover (129) is arranged at the upper end of the inner cylinder (213).

9. A reactor for acrylate esterification reaction according to claim 8, characterized in that, An arc-shaped groove (131) is arranged on the side wall of the fixed shaft (2151). The slider (112) is slidably arranged in the arc-shaped groove (131). A through groove (132) is arranged on the fixed frame (121). The slide bar (124) is vertically slidably arranged in the through groove (132). The length of the through groove (132) is adapted to the lateral movement range of the slider (112). The blades (2152) on the lower fan blade (215) and the upper blade (2152) are hinged through a connecting shaft (133).

10. A reactor for acrylate esterification reaction according to claim 1, characterized in that, A plurality of stirring blades (14) are arranged on the outer wall of the inner cylinder (213). The stirring blades (14) are inclined and an anti-sticking coating is applied on the surface.

Images