A continuous esterification reaction device and method

Abstract

The present invention relates to the technical field of esterification reaction, and specifically discloses a continuous esterification reaction device, comprising: a static mixer, a main material storage box, an auxiliary material storage box, an esterification kettle, a reactant storage box, and an exhaust gas neutralization barrel. The top of the main material storage box is connected to a first conveying channel, and the top of the auxiliary material storage box is connected to a second conveying channel. One end of the first conveying channel and the second conveying channel are both provided with a heating cylinder. The conveying mechanism comprises a spiral auger arranged in the first conveying channel and the second conveying channel, and the outer wall of the spiral auger is provided with a rough chrome block. In the present invention, through the mutual cooperation between the spiral auger, the rough chrome block, the rough chrome plate, the heat conductive layer, the heating tube, the heating resistance wire and the steam pipe, heat can be effectively generated by friction during the conveying process, and the heat is transported to the heating tube to preheat the material, thereby improving the stirring efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of esterification reaction, in particular to a continuous esterification reaction device and method. Background Art

[0002] Esterification is a type of organic chemical reaction, mainly the reaction of alcohol with carboxylic acid or inorganic oxygen-containing acid to generate ester and water. It is divided into three categories: the reaction of carboxylic acid with alcohol, the reaction of inorganic oxygen-containing acid with alcohol, and the reaction of inorganic strong acid with alcohol. The esterification reaction of carboxylic acid with alcohol is reversible and generally reacts very slowly, so concentrated sulfuric acid is often used as a catalyst. The reaction of polycarboxylic acid with alcohol can generate a variety of esters. The reaction of inorganic strong acid with alcohol is generally faster. The typical esterification reaction is the reaction of ethanol and acetic acid to generate ethyl acetate with aromatic odor. Most esterification reactions are carried out in a reactor with a jacket heating and stirring and mixing materials. The water generated by the esterification reaction is removed with an entrainer, and the feeding and discharging are intermittent.

[0003] Patent CN202366684U discloses a continuous esterification reactor, in which the materials are mixed in a stirring kettle and then pumped into a reaction elbow in the esterification kettle through a metering pump for reaction, and heat transfer oil is passed through the esterification kettle to heat the reaction elbow in the kettle. Since the esterification reaction absorbs heat, the higher the reaction temperature, the faster the esterification reaction rate, so the reactor needs to be heated. When the device is in use, it lacks a heating component, which leads to low stirring efficiency.

[0004] To this end, we propose a continuous esterification reaction device and method to solve the above problems. Summary of the invention

[0005] The object of the present invention is to provide a continuous esterification reaction device and method to solve the problem raised in the above background technology that the esterification reaction absorbs heat, the higher the reaction temperature, the faster the esterification reaction rate, and therefore the reactor needs to be heated. When the device is in use, it lacks a heating component, which leads to low stirring efficiency.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] In a first aspect, the present invention provides a continuous esterification reaction device, comprising: a static mixer, a main material storage tank, an auxiliary material storage tank, an esterification kettle, a reactant storage tank, and an exhaust gas neutralization barrel, wherein the top of the main material storage tank is connected to a first conveying channel through a feed pipe, and the top of the auxiliary material storage tank is connected to a second conveying channel through a feed pipe, and one end of each of the first conveying channel and the second conveying channel is provided with a heating cylinder;

[0008] The conveying mechanism is used to convey the materials in the main material storage box and the auxiliary material storage box, and comprises a spiral auger arranged in the first conveying channel and the second conveying channel, and the outer wall of the spiral auger is provided with a chrome block with a rough surface;

[0009] The heating mechanism is used to preheat the materials in the main material storage box and the auxiliary material storage box to improve the reaction efficiency. It includes a heat-conducting layer arranged on the inner wall of the heating cylinder, and a plurality of heating tubes are evenly spaced on the inner wall of the heat-conducting layer. A heating resistance wire is arranged on the outer wall of each heating tube, and a steam pipe is connected to the outer side of each heating resistance wire.

[0010] In a further embodiment, the bottom side of the static mixer is connected to the top side of the esterification kettle through a feed pipe, the interior of the esterification kettle includes a first reactor cavity and a second reactor cavity, the first reactor cavity is arranged above the second reactor cavity, a feed channel is arranged between the first reactor cavity and the second reactor cavity, and a spiral heating tube is wound around the outer wall of the feed channel.

[0011] In a further embodiment, a heat-conducting block is disposed between every two adjacent heating tubes, and one end of each of the heat-conducting blocks is connected to the outer wall of the steam pipe.

[0012] In a further embodiment, a condenser is provided on the top of the static mixer, a control panel is provided on one side of the static mixer, and an electric stirrer is provided on the inner top of the first reactor chamber and the inner side wall of the second reactor chamber.

[0013] In a further embodiment, a plurality of heat exchange channels are provided at one end of the first conveying channel and the second conveying channel, a copper wire ring is provided at the bottom of each heat exchange channel, a chromium plate with a rough surface is fixedly connected to the bottom of the copper wire ring, and the chromium plate is in contact with the chromium block.

[0014] In a further embodiment, a driving motor is provided at one end of the top of the first conveying channel and the second conveying channel, and the output end of the driving motor extends through a rotating shaft to the first conveying channel and the second conveying channel, and is fixedly connected with a driving bevel gear, and the bottom of the driving bevel gear is meshedly connected with a driven bevel gear, and the driven bevel gear is connected to the spiral auger through a rotating shaft.

[0015] In a further embodiment, a heat conduction pipe is provided in the heat exchange channel, an air intake channel is opened at one end of the heating tube, the cross-section of the air intake channel is L-shaped, and one end of the heat conduction pipe is connected to the air intake channel.

[0016] In a further embodiment, an exhaust fan is provided on the top of the exhaust gas neutralization barrel, and the input end of the exhaust fan is connected to the top side of the esterification kettle through an air duct, and the output end of the exhaust fan is connected to an air supply pipe, one end of the air supply pipe extends through the exhaust gas neutralization barrel and is connected to a purification pipe, the cross-sectional shape of the purification pipe is a multi-section U-shaped structure, and a plurality of air holes are evenly spaced on the outer wall of the purification pipe, the end of the purification pipe extending into the exhaust gas neutralization barrel is a sealed structure, the interior of the exhaust gas neutralization barrel is provided with exhaust gas neutralization liquid, an exhaust hood is provided on the top of one end of the exhaust gas neutralization barrel, one end of the exhaust hood is fixedly connected to an exhaust pipe, and one end of the exhaust pipe extends through the exhaust gas neutralization barrel and is connected to a switch valve.

[0017] In a further embodiment, a screening barrel is provided inside the reactant storage box, and a first screening frame, a second screening frame and a third screening frame are provided inside the screening barrel in sequence from top to bottom, and the screening mesh diameters of the first screening frame, the second screening frame and the third screening frame gradually decrease.

[0018] In a second aspect, the present invention further provides a continuous esterification reaction method, the specific steps of which are as follows:

[0019] Step 1: First, the main material in the main material storage box and the auxiliary material in the auxiliary material storage box are respectively transported to the static mixer through the first conveying channel and the second conveying channel;

[0020] Step 2: Then, during the conveying process, the output end of the driving motor drives the active bevel gear to rotate through the rotating shaft, and the active bevel gear rotates and meshes to drive the driven bevel gear to rotate, and the driven bevel gear rotates through the rotating shaft to drive the spiral auger to rotate for feeding. At the same time, the rough chrome block on the outer wall of the spiral auger rubs against the rough chrome plate to generate heat, and the heat reaches the steam pipe through the copper wire ring, the heat exchange channel, the heat conduction pipe and the air intake channel in turn, and the main material and the auxiliary material are preheated through the heat conduction layer, the heating pipe and the heating resistance wire;

[0021] Step 3: The gas coming out of the top of the static mixer is condensed by the condenser, and the non-condensable gas enters the esterification kettle and finally enters the tail gas neutralization barrel for neutralization;

[0022] Step 4: The product mixed by the static mixer first enters the first reaction kettle cavity and is mixed again by an electric stirrer. The mixed product is heated by a spiral heating tube in the feed channel to maintain the reaction temperature, and then enters the second reaction kettle cavity and is mixed again by an electric stirrer.

[0023] Step 5: The final product is transported to a screening barrel in a reactant storage box, and then screened and filtered through a first screening frame, a second screening frame, and a third screening frame in sequence to obtain reaction products of different volumes;

[0024] Step 6: The exhaust fan transports the non-condensable gas and the waste gas generated by the reaction into the purification pipe, and then reacts with the exhaust neutralizing liquid through multiple air holes on the outer wall of the purification pipe to neutralize them. Finally, the switch valve is opened and the waste gas is discharged through the exhaust hood and exhaust pipe.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] Firstly, in the present invention, the spiral auger, the rough-surfaced chrome block, the rough-surfaced chrome plate, the heat-conducting layer, the heating tube, the heating resistance wire and the steam tube cooperate with each other, so that heat can be effectively generated by friction during the conveying process, and the heat can be conveyed to the heating tube to preheat the material, thereby improving the stirring efficiency;

[0027] Secondly, in the present invention, by providing the exhaust fan, the gas transmission pipe, the purification pipe, the air vent and the tail gas neutralizing liquid, the waste gas and tail gas generated in the reaction process can be uniformly neutralized;

[0028] Thirdly, in the present invention, by providing the first screening frame, the second screening frame and the third screening frame, reaction products of different volumes can be obtained according to demand, thus saving subsequent screening time. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of a continuous esterification reaction device and method;

[0030] Figure 2 It is a structural schematic diagram of the conveying mechanism in the present invention;

[0031] Figure 3 is a schematic diagram of the internal structure of the second conveying channel in the present invention;

[0032] Figure 4 It is a schematic diagram of the internal structure of the heating cylinder in the present invention;

[0033] Figure 5 Schematic diagram of the internal structure of the static mixer in the present invention;

[0034] Figure 6 Schematic diagram of the internal structure of the reactant storage box in the present invention;

[0035] Figure 7 This is a schematic diagram of the internal structure of the tail gas neutralization barrel in the present invention;

[0036] Figure 8 It is a schematic diagram of the structure enlarged at point A in the present invention.

[0037] In the figure: 1. static mixer; 2. main material storage box; 3. auxiliary material storage box; 4. esterification kettle; 5. reactant storage box; 6. tail gas neutralization barrel; 7. first conveying channel; 8. second conveying channel; 9. drive motor; 10. heating resistance wire; 11. heating cylinder; 12. heat pipe; 13. condenser; 14. control panel; 15. exhaust fan; 16. gas pipe; 17. purification pipe; 18. air vent; 19. exhaust hood; 20. exhaust pipe; 21. switch valve; 22. first Reactor chamber; 23, second reactor chamber; 24, feed channel; 25, spiral heating tube; 26, electric stirrer; 27, screening barrel; 28, first screening mesh frame; 29, second screening mesh frame; 30, third screening mesh frame; 31, active bevel gear; 32, driven bevel gear; 33, spiral auger; 34, chrome block; 35, chrome plate; 36, copper wire ring; 37, heat exchange channel; 38, air inlet channel; 39, heating tube; 40, heat conduction block; 41, steam pipe; 42, heat conduction layer. DETAILED DESCRIPTION

[0038] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0039] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 indirectly connected 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 the present invention can be understood by specific circumstances.

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] Example 1

[0042] See also Figure 1-Figure 8 In an embodiment of the present invention, a continuous esterification reaction device includes: a static mixer 1, a main material storage tank 2, an auxiliary material storage tank 3, an esterification kettle 4, a reactant storage tank 5, and a tail gas neutralization barrel 6. The top of the main material storage tank 2 is connected to a first conveying channel 7 through a feed pipe, and the top of the auxiliary material storage tank 3 is connected to a second conveying channel 8 through a feed pipe. One end of each of the first conveying channel 7 and the second conveying channel 8 is provided with a heating cylinder 11;

[0043] The conveying mechanism is used to convey the materials in the main material storage box 2 and the auxiliary material storage box 3, and includes a spiral auger 33 arranged in the first conveying channel 7 and the second conveying channel 8, and the outer wall of the spiral auger 33 is provided with a chrome block 34 with a rough surface;

[0044] The heating mechanism is used to preheat the materials in the main material storage box 2 and the auxiliary material storage box 3 to improve the reaction efficiency. It includes a heat-conducting layer 42 arranged on the inner wall of the heating tube 11, and a plurality of heating tubes 39 are evenly spaced on the inner wall of the heat-conducting layer 42. A heating resistance wire 10 is provided on the outer wall of each of the heating tubes 39, and a steam pipe 41 is connected to the outer side of each of the heating resistance wires 10.

[0045] Furthermore, in the above technical solution, the bottom side of the static mixer 1 is connected to the top side of the esterification kettle 4 through a feed pipe, and the interior of the esterification kettle 4 includes a first reactor chamber 22 and a second reactor chamber 23, the first reactor chamber 22 is arranged above the second reactor chamber 23, and a feed channel 24 is arranged between the first reactor chamber 22 and the second reactor chamber 23, and the outer wall of the feed channel 24 is wound with a spiral heating tube 25.

[0046] Furthermore, in the above technical solution, a heat conducting block 44 is disposed between every two adjacent heating tubes 39 , and one end of each heat conducting block 44 is connected to the outer wall of the steam tube 41 .

[0047] Furthermore, in the above technical solution, a condenser 13 is provided on the top of the static mixer 1, a control panel 14 is provided on one side of the static mixer 1, and an electric agitator 26 is provided on the inner top of the first reactor chamber 22 and the inner side wall of the second reactor chamber 23.

[0048] Furthermore, in the above technical solution, a plurality of heat exchange channels 37 are provided at one end of the first conveying channel 7 and the second conveying channel 8, and a copper wire ring 36 is provided at the bottom of each heat exchange channel 37, and a chromium plate 35 with a rough surface is fixedly connected to the bottom of the copper wire ring 36, and the chromium plate 35 is in contact with the chromium block 34.

[0049] Furthermore, in the above technical solution, a driving motor 9 is provided at one end of the top of each of the first conveying channel 7 and the second conveying channel 8, and an output end of the driving motor 9 extends through a rotating shaft to the first conveying channel 7 and the second conveying channel 8, and is fixedly connected with an active bevel gear 31, and a driven bevel gear 32 is meshedly connected to the bottom of the active bevel gear 31, and the driven bevel gear 32 is connected to a spiral auger 33 through a rotating shaft, a heat conduction pipe 12 is provided in the heat exchange channel, and an air intake channel 38 is opened at one end of the heating tube 11, and the cross-sectional shape of the air intake channel 38 is L-shaped, and one end of the heat conduction pipe 12 is connected to the air intake channel 38.

[0050] Further, in the above technical solution, an exhaust fan 15 is arranged on the top of the exhaust gas neutralization barrel 6, and the input end of the exhaust fan 15 is connected to the top side of the esterification kettle 4 through an air guide pipe, and the output end of the exhaust fan 15 is connected to an air supply pipe 16, and one end of the air supply pipe 16 extends through the exhaust gas neutralization barrel 6 and is connected to a purification pipe 17, and the cross-sectional shape of the purification pipe 17 is a multi-section U-shaped structure, and a plurality of air holes 18 are opened on the outer wall of the purification pipe 17 at equal intervals, and the purification pipe 17 extends to the exhaust gas neutralization barrel 6. One end of the exhaust gas neutralization barrel 6 is a sealed structure, and the exhaust gas neutralization liquid is arranged inside the exhaust gas neutralization barrel 6. An exhaust hood 19 is arranged on the top of one end of the exhaust gas neutralization barrel 6, and one end of the exhaust hood 19 is fixedly connected to an exhaust pipe 20. The exhaust pipe 20 extends through and extends to one end outside the exhaust gas neutralization barrel 6 and is connected to a switch valve 21. By arranging the exhaust fan 15, the air supply pipe 16, the purification pipe 17, the air vent 18 and the exhaust gas neutralization liquid, the waste gas and exhaust gas generated in the reaction process can be effectively and uniformly neutralized.

[0051] Furthermore, in the above technical solution, a screening barrel 27 is provided inside the reactant storage box 5, and a first screening frame 28, a second screening frame 29 and a third screening frame 30 are provided inside the screening barrel 27 from top to bottom. The screening mesh diameters of the first screening frame 28, the second screening frame 29 and the third screening frame 30 gradually decrease. By setting the first screening frame 28, the second screening frame 29 and the third screening frame 30, reaction products of different volumes can be obtained according to needs, saving subsequent screening time.

[0052] Example 2

[0053] See also Figure 1-Figure 8 , a continuous esterification reaction method, the specific steps are as follows:

[0054] Step 1: First, the main material in the main material storage box 2 and the auxiliary material in the auxiliary material storage box 3 are respectively transported to the static mixer 1 through the first conveying channel 7 and the second conveying channel 8;

[0055] Step 2: Then, during the conveying process, the output end of the driving motor 9 drives the active bevel gear 31 to rotate through the rotating shaft, and the active bevel gear 31 rotates and meshes to drive the driven bevel gear 32 to rotate, and the driven bevel gear 32 rotates and drives the spiral auger 33 to rotate through the rotating shaft to convey the material. At the same time, the rough chrome block 34 on the outer wall of the spiral auger 33 rubs with the rough chrome plate 35 to generate heat, and the heat reaches the steam pipe 41 in turn through the copper wire ring 36, the heat exchange channel 37, the heat pipe 12 and the air intake channel 38, and at the same time, the main material and the auxiliary material are preheated through the heat conductive layer 40, the heating pipe 39 and the heating resistance wire 10;

[0056] Step 3: The gas coming out of the top of the static mixer 1 is condensed by the condenser 13, and the non-condensable gas enters the esterification kettle 4 and finally enters the tail gas neutralization barrel 6 for neutralization;

[0057] Step 4: The product mixed by the static mixer 1 first enters the first reaction kettle chamber 22 and is mixed again by the electric stirrer 26. The mixed product is heated by the spiral heating tube 25 in the feed channel 24 to maintain the reaction temperature, and then enters the second reaction kettle chamber 23 and is mixed again by the electric stirrer 26.

[0058] Step 5: The final product is transported to the screening barrel 27 in the reactant storage box 5, and then screened and filtered through the first screening frame 28, the second screening frame 29 and the third screening frame 30 in sequence to obtain reaction products of different volumes;

[0059] Step 6: The exhaust fan 15 transports the non-condensable gas and the waste gas generated by the reaction into the purification pipe 17, and then reacts and neutralizes with the exhaust neutralizing liquid through the multiple air holes 18 on the outer wall of the purification pipe 17, and finally opens the switch valve 21 and discharges it through the exhaust hood 19 and the exhaust pipe 20.

[0060] The working principle of the present invention is:

[0061] First, the main material in the main material storage box 2 and the auxiliary material in the auxiliary material storage box 3 are respectively transported to the static mixer 1 through the first conveying channel 7 and the second conveying channel 8. Then, during the conveying process, the output end of the driving motor 9 drives the active bevel gear 31 to rotate through the rotating shaft, and the active bevel gear 31 rotates and engages to drive the driven bevel gear 32 to rotate. The driven bevel gear 32 rotates and drives the spiral auger 33 to rotate through the rotating shaft to transport the materials. At the same time, the rough chrome block 34 on the outer wall of the spiral auger 33 and the rough chrome plate 35 rub to generate heat. The heat reaches the steam pipe 41 through the copper wire ring 36, the heat exchange channel, the heat conduction pipe 12 and the air inlet channel 38 in turn. At the same time, the main material and the auxiliary material are preheated through the heat conduction layer 42, the heating pipe 39 and the heating resistor 10. The gas coming out of the top of the static mixer 1 is condensed by the condenser 13, and the non-condensable gas enters The product is then transported to the esterification kettle 4 and finally to the tail gas neutralization barrel 6 for neutralization. The product mixed by the static mixer 1 first enters the first reactor chamber 22 and is mixed again by the electric stirrer 26. The mixed product is heated by the spiral heating tube 25 in the feed channel 24 to maintain the reaction temperature. The product then enters the second reactor chamber 23 and is mixed again by the electric stirrer 26. The product is finally transported to the screening barrel 27 in the reactant storage box 5, and then is screened and filtered by the first screening mesh frame 28, the second screening mesh frame 29 and the third screening mesh frame 30 in turn to obtain reaction products of different volumes. The exhaust fan 15 transports the non-condensable gas and the waste gas generated by the reaction to the purification pipe 17, and then reacts and neutralizes with the tail gas neutralizing liquid through the multiple air holes 18 on the outer wall of the purification pipe 17. Finally, the switch valve 21 is opened and the product is discharged through the exhaust hood 19 and the exhaust pipe 20.

[0062] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0063] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A continuous esterification reaction device, characterized in that: include: A static mixer (1), a main material storage tank (2), an auxiliary material storage tank (3), an esterification kettle (4), a reactant storage tank (5), and an exhaust gas neutralization barrel (6); the top of the main material storage tank (2) is connected to a first conveying channel (7) via a feed pipe; the top of the auxiliary material storage tank (3) is connected to a second conveying channel (8) via a feed pipe; and a heating cylinder (11) is provided at one end of each of the first conveying channel (7) and the second conveying channel (8); A conveying mechanism, used for conveying materials in the main material storage box (2) and the auxiliary material storage box (3), comprising a spiral auger (33) arranged in the first conveying channel (7) and the second conveying channel (8), wherein the outer wall of the spiral auger (33) is provided with a chrome block (34) with a rough surface; The heating mechanism is used for preheating the materials in the main material storage box (2) and the auxiliary material storage box (3) to improve the reaction efficiency, and comprises a heat-conducting layer (42) arranged on the inner wall of the heating cylinder (11), a plurality of heating tubes (39) are arranged at equal intervals on the inner wall of the heat-conducting layer (42), a heating resistance wire (10) is arranged on the outer wall of each heating tube (39), and the outer side of each heating resistance wire (10) is connected to a steam pipe (41); A plurality of heat exchange channels (37) are provided at one end of each of the first conveying channel (7) and the second conveying channel (8); a copper wire ring (36) is provided at the bottom of each of the heat exchange channels (37); a chrome plate (35) with a rough surface is fixedly connected to the bottom of the copper wire ring (36); the chrome plate (35) is in contact with the chrome block (34); A heat conduction pipe (12) is provided in the heat exchange channel, an air intake channel (38) is provided at one end of the heating tube (11), the air intake channel (38) is connected to the steam pipe (41), the cross-section of the air intake channel (38) is L-shaped, and one end of the heat conduction pipe (12) is connected to the air intake channel (38).

2. A continuous esterification reaction device according to claim 1, characterized in that: The bottom side of the static mixer (1) is connected to the top side of the esterification kettle (4) through a feed pipe. The interior of the esterification kettle (4) comprises a first reaction kettle chamber (22) and a second reaction kettle chamber (23). The first reaction kettle chamber (22) is arranged above the second reaction kettle chamber (23). A feed channel (24) is arranged between the first reaction kettle chamber (22) and the second reaction kettle chamber (23). A spiral heating tube (25) is wound around the outer wall of the feed channel (24).

3. A continuous esterification reaction device according to claim 1, characterized in that: A heat conducting block (44) is provided between each two adjacent heating tubes (39), and one end of each heat conducting block (44) is connected to the outer wall of the steam tube (41).

4. A continuous esterification reaction device according to claim 2, characterized in that: A condenser (13) is provided on the top of the static mixer (1), a control panel (14) is provided on one side of the static mixer (1), and an electric stirrer (26) is provided on the inner top of the first reaction kettle chamber (22) and the inner side wall of the second reaction kettle chamber (23).

5. A continuous esterification reaction device according to claim 1, characterized in that: A driving motor (9) is provided at one end of the top of each of the first conveying channel (7) and the second conveying channel (8); an output end of the driving motor (9) extends through a rotating shaft into the first conveying channel (7) and the second conveying channel (8) and is fixedly connected to a driving bevel gear (31); a driven bevel gear (32) is meshedly connected to the bottom of the driving bevel gear (31); and the driven bevel gear (32) is connected to a spiral auger (33) via a rotating shaft.

6. A continuous esterification reaction device according to claim 1, characterized in that: An exhaust fan (15) is arranged on the top of the exhaust gas neutralization barrel (6), the input end of the exhaust fan (15) is connected to one side of the top of the esterification kettle (4) through an air guide pipe, the output end of the exhaust fan (15) is connected to an air supply pipe (16), one end of the air supply pipe (16) extends through the exhaust gas neutralization barrel (6) and is connected to a purification pipe (17), the cross-section of the purification pipe (17) is a multi-section U-shaped structure, and the outer wall of the purification pipe (17) is provided with a plurality of U-shaped structures. A plurality of air holes (18) are provided at equal intervals, one end of the purification pipe (17) extending into the exhaust gas neutralization barrel (6) is a sealed structure, an exhaust gas neutralization liquid is arranged inside the exhaust gas neutralization barrel (6), an exhaust hood (19) is arranged on the top of one end of the exhaust gas neutralization barrel (6), one end of the exhaust hood (19) is fixedly connected to an exhaust pipe (20), and one end of the exhaust pipe (20) extending through and outside the exhaust gas neutralization barrel (6) is connected to a switch valve (21).

7. A continuous esterification reaction device according to claim 1, characterized in that: A screening barrel (27) is arranged inside the reactant storage box (5), and a first screening frame (28), a second screening frame (29) and a third screening frame (30) are arranged inside the screening barrel (27) in sequence from top to bottom, and the screening mesh diameters of the first screening frame (28), the second screening frame (29) and the third screening frame (30) gradually decrease.

8. A continuous esterification reaction method, the method using a continuous esterification reaction device according to any one of claims 1 to 7, characterized in that: The specific steps are as follows: Step 1: First, the main material in the main material storage box (2) and the auxiliary material in the auxiliary material storage box (3) are respectively transported to the static mixer (1) through the first transport channel (7) and the second transport channel (8); Step 2: Then, during the conveying process, the output end of the driving motor (9) drives the driving bevel gear (31) to rotate through the rotating shaft, and the driving bevel gear (31) rotates and meshes to drive the driven bevel gear (32) to rotate, and the driven bevel gear (32) rotates through the rotating shaft to drive the spiral auger (33) to rotate to convey the material. At the same time, the rough chrome block (34) on the outer wall of the spiral auger (33) and the rough chrome plate (35) generate heat by friction. The heat is sequentially transmitted through the copper wire ring (36), the heat exchange channel (37), the heat conduction pipe (12) and the air intake channel (38) to the steam pipe (41), and at the same time, the main material and the auxiliary material are preheated through the heat conduction layer (42), the heating pipe (39) and the heating resistance wire (10); Step 3: The gas coming out of the top of the static mixer (1) is condensed by the condenser (13), and the non-condensable gas enters the esterification kettle (4) and finally enters the tail gas neutralization barrel (6) for neutralization; Step 4: the product mixed by the static mixer (1) enters the first reaction kettle chamber (22) and is mixed again by the electric stirrer (26). The mixed product is heated by the spiral heating tube (25) in the feed channel (24) to maintain the reaction temperature, and then enters the second reaction kettle chamber (23) and is mixed again by the electric stirrer (26); Step 5: The final product is transported to the screening barrel (27) in the reactant storage box (5), and then screened and filtered through the first screening frame (28), the second screening frame (29) and the third screening frame (30) to obtain reaction products of different volumes; Step 6: The exhaust fan (15) transports the non-condensable gas and the waste gas generated by the reaction into the purification pipe (17), and then reacts with the exhaust gas neutralizing liquid through the multiple air holes (18) on the outer wall of the purification pipe (17) to neutralize, and finally opens the switch valve (21) to discharge through the exhaust hood (19) and the exhaust pipe (20).

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