Efficient heat exchange polymerization reaction kettle

Abstract

The utility model discloses an efficient heat exchange polymerization reaction kettle, and belongs to the technical field of reaction kettles. The reaction kettle comprises a kettle body, the kettle body comprises an upper hemisphere head end socket, a lower hemisphere head end socket and a kettle body, the kettle body comprises a material treatment cavity, a discharge port is formed in the surface of the upper hemisphere head end socket, and a feed port, a catalyst inlet and an emptying port are formed in the surface of the lower hemisphere head end socket; the heat exchange mechanism comprises a heat exchange pipe arranged in the material treatment cavity and heat dissipation plates arranged at the two ends of the heat exchange pipe; and the rotating mechanism comprises a stirring piece arranged in the lower hemisphere head sealing head, double mechanical seals, a rotating motor, a speed reducing motor and a lead screw arranged in the advancing direction of the raw materials. The heat exchange tube is additionally arranged in the kettle, the push type paddle pushes the reacted polymer upwards, the polymer passes through the heat exchange tube in the kettle, the temperature is rapidly reduced, a large amount of ordered heat removal is realized, the product conversion efficiency and the product quality can be improved, and the yield and the production safety can be improved.

Description

Technical Field

[0001] The present application belongs to the technical field of reactors, and in particular relates to a high-efficiency heat exchange polymerization reactor. Background Art

[0002] During the polymerization reaction, a large amount of heat needs to be removed in an orderly manner. If it cannot be removed in time, it is easy to cause the polymer to melt and agglomerate, affecting the product quality. Moreover, if the heat removal effect is not good, it will inevitably lead to changes in the reaction cycle, and ultimately affect the polymer yield. At present. Due to the influence of the kinetic characteristics of the polymerization reaction and the limited heat removal capacity of the existing polymerization kettle, the problem of heat removal difficulty in the polymerization kettle is further aggravated, resulting in the difficulty in controlling the pressure and temperature in the later stage of the reaction. It can only be controlled by terminating the reaction in advance or opening a large recovery, which not only reduces the conversion rate of the propylene single kettle, but also brings considerable hidden dangers to safe production. Therefore, it is urgent to design a strong heat exchange polymerization reactor to meet production needs. Utility Model Content

[0003] The utility model provides a high-efficiency heat exchange polymerization reactor. By adding heat exchange tubes in the reactor, the polymer after the reaction is completed is pushed upward by the propulsion blades. The polymer passes through the heat exchange tubes in the reactor, and the temperature is rapidly reduced, realizing a large amount of orderly heat removal, which can not only improve the product conversion efficiency and product quality, but also improve the output and production safety.

[0004] In order to solve the above problems, the utility model provides a high-efficiency heat exchange polymerization reactor, the reactor comprising:

[0005] A kettle body, comprising an upper hemispherical head end cap, a lower hemispherical head end cap, and a kettle body, wherein the kettle body is arranged between the upper hemispherical head end cap and the lower hemispherical head end cap, and is respectively connected to the upper hemispherical head end cap and the lower hemispherical head end cap, wherein the kettle body comprises a material processing chamber, which is a cylindrical chamber arranged up and down, wherein a discharge port is arranged on the surface of the upper hemispherical head end cap, and a feed port, a catalyst inlet, and an emptying port are arranged on the surface of the lower hemispherical head end cap;

[0006] A heat exchange mechanism, comprising a heat exchange tube arranged in the material processing chamber and heat dissipation plates arranged at both ends of the heat exchange tube;

[0007] The rotating mechanism includes a stirring member arranged inside the lower hemispherical head, a double mechanical seal, a rotating motor, a reduction motor, and a screw arranged along the direction of movement of the raw material. One end of the screw is connected to the reduction motor through the double mechanical seal, and the other end is connected to the stirring member.

[0008] Optionally, a temperature transmission device is also provided on the surface of the upper hemispherical head to measure the temperature in the kettle.

[0009] Optionally, the number of the discharge ports is one or two.

[0010] Optionally, a coolant outlet and a coolant inlet are provided on the surface of the kettle body, the coolant outlet is provided at the lower part of the kettle body, and the coolant inlet is provided at the upper part of the kettle body.

[0011] Optionally, the heat exchange tubes are symmetrically distributed in the material processing chamber along the material traveling direction, and the number of heat exchange tubes in each part is equal.

[0012] Optionally, the diameter of the heat exchange tube close to the center is larger than the diameter of the surrounding heat exchange tubes.

[0013] Optionally, the heat sink is arranged at the upper and lower ends of the kettle body and is respectively connected to the heat exchange tube. The heat sink includes a plurality of heat dissipation holes for heat dissipation and heat transfer.

[0014] Optionally, the diameter of the heat dissipation hole in the center of the heat dissipation plate is larger than the diameter of the peripheral heat dissipation holes.

[0015] Optionally, the stirring member is a propulsion blade connected to the screw via a coupling.

[0016] Optionally, the rotary motor is configured to provide the screw with a direction-variable rotary power, and the reduction motor is configured to control the rotation speed of the screw.

[0017] The beneficial effects of this application include but are not limited to:

[0018] 1. The high-efficiency heat exchange polymerization reactor provided by the present application has a plurality of symmetrically distributed heat exchange tubes arranged in the reactor. When the polymer passes through the heat exchange tubes in the reactor, the temperature is rapidly reduced, and a large amount of heat is removed, thereby ensuring the timeliness of heat dissipation and high heat dissipation efficiency. At the same time, the diameter of the central heat exchange tube is larger than that of the peripheral heat exchange tubes, thereby ensuring uniform heat dissipation.

[0019] 2. The high-efficiency heat exchange polymerization reactor provided in the present application is provided with a propulsion blade to push the materials after the reaction upward and push the materials into the heat exchange tube in time, thereby avoiding the blockage of the materials and improving the heat exchange efficiency;

[0020] 3. The high-efficiency heat exchange polymerization reactor provided in this application is conducive to extending the service life of the reactor and reducing the risk of accidents in the reactor. It can not only improve the product conversion efficiency and product quality, but also increase the output and production safety to meet production needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0022] Figure 1 This is a schematic diagram of the overall structure of a high-efficiency heat exchange polymerization reactor involved in an embodiment of the present application;

[0023] Figure 2 This is a schematic diagram of the heat sink structure involved in an embodiment of the present application.

[0024] List of parts and reference numerals:

[0025] 11-upper hemispherical head, 111-first discharge port, 112-second discharge port, 113-temperature transmission device, 12-kettle body, 121-material processing chamber, 122-coolant inlet, 123-coolant outlet, 13-lower hemispherical head, 131-feed port, 132-catalyst inlet, 133-emptying port;

[0026] 21-heat exchange tube, 22-heat dissipation plate, 221-heat dissipation hole;

[0027] 31-propulsion blades, 32-double mechanical seals, 33-rotating motors, 34-reduction motors, 35-screws, 36-couplings. DETAILED DESCRIPTION

[0028] In order to more clearly illustrate the overall concept of the present application, a detailed description is given below in an illustrative manner in conjunction with the accompanying drawings.

[0029] In order to more clearly understand the above-mentioned purposes, features and advantages of the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0030] In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present application is not limited to the specific embodiments disclosed below.

[0031] In addition, in the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0032] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0033] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0034] In the present application, unless otherwise clearly specified and limited, a first feature "above" or "below" a second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0035] refer to Figure 1-2 The embodiment of the present application discloses a high-efficiency heat exchange polymerization reactor, which comprises: a reactor body, a heat exchange mechanism, and a rotating mechanism.

[0036] The kettle body comprises an upper hemispherical head seal 11, a lower hemispherical head seal 13 and a kettle body 12. The kettle body 12 is arranged between the upper hemispherical head seal 11 and the lower hemispherical head seal 13, and is respectively connected to the upper hemispherical head seal 11 and the lower hemispherical head seal 13.

[0037] Specifically, the upper hemispherical head 11 is also provided with a discharge port and a temperature transmission device 113 for measuring the temperature in the kettle. The number of the discharge ports is one or two. In a specific embodiment, Figure 1As shown, there are two discharge ports, namely, a first discharge port 111 and a second discharge port 112. The first discharge port 111 is arranged at the upper part of the upper hemispherical head 11, and the second discharge port 112 is arranged at one side of the upper hemispherical head 11. The two discharge ports can be provided to take out the materials in time and prevent the materials in the kettle from being blocked.

[0038] The kettle body 12 includes a material processing chamber 121, which is a cylindrical cavity arranged up and down. A coolant outlet 123 and a coolant inlet 122 are provided on the surface of the kettle body 12. The coolant outlet 123 is provided at the lower part of the kettle body 12, and the coolant inlet 122 is provided at the upper part of the kettle body 12. The coolant is in the form of top-in and bottom-out. The coolant can flow into the material processing chamber 121 through the coolant inlet 122, and realize heat exchange with the working medium to be dissipated in the material processing chamber 121. After that, the coolant flows to the coolant outlet 123 to store heat for the next heat dissipation. The coolant of the present application can be cooling water or other heat-conducting media, but it cannot be flammable and explosive chemicals, so as to ensure that after passing through the material processing chamber 121, the coolant will not explode due to temperature increase and other accidents.

[0039] The surface of the lower hemispherical head 13 is provided with a feed port 131, a catalyst inlet 132 and an exhaust port 133. In a specific embodiment, Figure 1 As shown, the feed port 131 and the catalyst inlet 132 are arranged on the same side of the lower hemispherical head 13, and the catalyst inlet 132 is located above the feed port 131, which is conducive to the complete reaction of the catalyst and the material. When the reactor stops working, the emptying port 133 is opened to empty the materials remaining in the reactor to avoid affecting the next use.

[0040] The heat exchange mechanism includes a heat exchange tube 21 disposed in the material processing chamber 121 and heat dissipation plates 22 disposed at both ends of the heat exchange tube 21 .

[0041] Specifically, the heat exchange tubes 21 are symmetrically distributed in the material processing chamber 121 along the material moving direction, and the number of heat exchange tubes 21 in each part is equal. Figure 1 As shown, multiple equal numbers of heat exchange tubes 21 are arranged on both sides of the material processing chamber 121, and the diameter of the heat exchange tube 21 near the center of the material processing chamber 121 is larger than the diameter of the surrounding heat exchange tubes 21. The temperature of the material drops rapidly when passing through the heat exchange tubes 21 in the reactor, and a large amount of heat is removed, which ensures the timeliness of heat dissipation and high heat dissipation efficiency. At the same time, the diameter of the central heat exchange tube 21 is larger than the diameter of the surrounding heat exchange tubes 21, which can ensure uniform heat dissipation and avoid channel blockage and excessive pressure at the bottom of the reactor.

[0042] The heat sink 22 is arranged at the upper and lower ends of the kettle body 12. The heat sink 22 includes a plurality of heat dissipation holes 221 respectively connected to the heat exchange tube 21 for heat dissipation and heat transfer. The contact area between the heat exchange tube 21 and the working medium to be dissipated is further increased, that is, the heat exchange area is further increased, and the heat exchange efficiency is further enhanced. In addition, the aperture of the heat dissipation hole 221 in the center of the heat sink 22 is larger than the aperture of the peripheral heat dissipation holes 221. Sufficient space is reserved for the flow of the working medium to be dissipated, so as to facilitate the temperature balance in the kettle.

[0043] The rotating mechanism includes a stirring member arranged inside the lower hemispherical head 13, a double mechanical seal 32, a rotating motor 33, a reduction motor 34, and a screw 35 arranged along the direction of raw material movement. One end of the screw 35 is connected to the reduction motor 34 through the double mechanical seal 32, and the other end is connected to the stirring member.

[0044] Specifically, the stirring member is a single-layer propulsion blade 31, which is connected to the screw 35 through a coupling 36. The rotary motor 33 and the reduction motor 34 are arranged outside the kettle and directly connected to the lower end of the screw 35. The screw can be configured to be arranged in the lower hemispherical head 13 along the direction of the raw material movement (for example, from bottom to top). The rotary motor 33 is configured to provide the screw 35 with a rotational power with variable direction, and the reduction motor 34 is configured to control the rotation speed of the screw 35. For example, the rotary motor 33 can be configured to drive the screw 35 to move in a clockwise or counterclockwise direction, and the reduction motor 34 can be configured to control the rotation speed of the screw 35. When the rotation speed of the screw 35 is fast, the reduction motor 34 is started to slow down the rotation speed of the screw 35.

[0045] The stirring element is provided to facilitate the mixing and flow of the working medium to be cooled in the kettle, push the material after the reaction upward, and push the material to the heat exchange tube 21 in time, avoiding the blockage of the material, and also helping to keep the temperature in the kettle uniform and improve the cooling efficiency.

[0046] As an embodiment not shown, the high-efficiency heat exchange polymerization reactor also includes an automatic control mechanism to automatically monitor the temperature, pressure and stirring speed in the reactor. For example, a predetermined temperature range is set, and when the temperature in the reactor is lower than or higher than the set value, the temperature controller will sound an alarm. A predetermined stirring speed is set, and when the stirring speed is lower than or higher than the set value, the speed controller will automatically control the rotating motor 33 or the reduction motor 34 to return the stirring speed to the predetermined stirring speed. By setting an automatic control mechanism, it is possible to achieve precise control of parameters such as stirring speed and temperature in the reactor, thereby improving production efficiency and production safety.

[0047] In a specific embodiment, the reactor of the present application is mainly used for polymerization reactions with a short reaction time, such as a butyl rubber reactor, where the reaction time is in the millisecond level. By adding a heat exchange tube 21 in the reactor, the polymer after the reaction is completed is pushed upward by the propulsion blade 31, and the polymer passes through the heat exchange tube 21 in the reactor, and the temperature is rapidly reduced.

[0048] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the claims of the present invention.

Claims

1. A high-efficiency heat exchange polymerization reactor, characterized in that: The reactor comprises: A kettle body, comprising an upper hemispherical head end cap, a lower hemispherical head end cap, and a kettle body, wherein the kettle body is arranged between the upper hemispherical head end cap and the lower hemispherical head end cap, and is respectively connected to the upper hemispherical head end cap and the lower hemispherical head end cap, wherein the kettle body comprises a material processing chamber, which is a cylindrical chamber arranged up and down, wherein a discharge port is arranged on the surface of the upper hemispherical head end cap, and a feed port, a catalyst inlet, and an emptying port are arranged on the surface of the lower hemispherical head end cap; A heat exchange mechanism, comprising a heat exchange tube arranged in the material processing chamber and heat dissipation plates arranged at both ends of the heat exchange tube; The rotating mechanism includes a stirring member arranged inside the lower hemispherical head, a double mechanical seal, a rotating motor, a reduction motor, and a screw arranged along the direction of travel of the added raw materials. One end of the screw is connected to the reduction motor through the double mechanical seal, and the other end is connected to the stirring member.

2. The high-efficiency heat exchange polymerization reactor according to claim 1, characterized in that: The upper hemispherical head surface is also provided with a temperature transmission device for measuring the temperature in the kettle.

3. The high-efficiency heat exchange polymerization reactor according to claim 1, characterized in that: The number of the discharge ports is one or two.

4. The high-efficiency heat exchange polymerization reactor according to claim 1, characterized in that: The surface of the kettle body is provided with a coolant outlet and a coolant inlet, the coolant outlet is provided at the lower part of the kettle body, and the coolant inlet is provided at the upper part of the kettle body.

5. The high-efficiency heat exchange polymerization reactor according to claim 1, characterized in that: The heat exchange tubes are symmetrically distributed in the material processing chamber along the material traveling direction, and the number of heat exchange tubes in each part is equal.

6. The high-efficiency heat exchange polymerization reactor according to claim 5, characterized in that: The diameter of the heat exchange tube close to the center is larger than the diameter of the surrounding heat exchange tubes.

7. The high-efficiency heat exchange polymerization reactor according to claim 1, characterized in that: The heat sink is arranged at the upper and lower ends of the kettle body and is respectively connected to the heat exchange tubes. The heat sink includes a plurality of heat dissipation holes for heat dissipation and heat transfer.

8. The high-efficiency heat exchange polymerization reactor according to claim 7, characterized in that: The diameter of the heat dissipation hole in the center of the heat dissipation plate is larger than the diameter of the peripheral heat dissipation holes.

9. The high-efficiency heat exchange polymerization reactor according to claim 1, characterized in that: The stirring member is a propulsion blade connected to the screw rod through a coupling.

10. The high-efficiency heat exchange polymerization reactor according to claim 1, characterized in that: The rotary motor is configured to provide the screw shaft with a direction-variable rotary power, and the reduction motor is configured to control the rotation speed of the screw shaft.

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