A heat exchange device applied to production of high-performance silicon-modified acrylic polymers

Abstract

The utility model discloses a kind of heat exchange devices applied to high-performance silicon modified acrylic polymer production, belong to coating field, for the polymerization reaction of continuous production high-performance silicon modified acrylic polymer, including sequentially arranged first heat exchanger, second heat exchanger and third heat exchanger, tubular reactor sequentially passes through first heat exchanger, second heat exchanger and third heat exchanger, first heat exchanger is heater, second heat exchanger is radiator, and third heat exchanger is heater.The utility model makes that the target product after polymerization is not only good uniformity, and yield is high.

Description

Technical Field

[0001] This utility model relates to the field of coatings, and more specifically, to a heat exchange device used in the production of high-performance silicone-modified acrylic polymers. Background Technology

[0002] The production process of high-performance silicone-modified acrylic polymers includes raw material pretreatment, pre-emulsification, polymerization reaction, silane modification reaction, solvent removal, and post-treatment and blending. Among these, the polymerization reaction is the key process. Currently, the production of high-performance silicone-modified acrylic polymers typically uses batch polymerization reactors. However, batch production can result in poor product uniformity due to varying actual conditions in each batch. To achieve better product uniformity and meet the trend towards automated production, continuous reaction has become the industry's pursuit. Existing tubular reactors are used for the polymerization reaction of high-performance silicone-modified acrylic polymers. However, the heat exchange devices in these tubular reactors are the same as those in the polymerization reactors, using only one heat exchanger (similar to the polymerization reactor). This results in a lower yield of the target product compared to batch polymerization reactors. Utility Model Content

[0003] To address the aforementioned problems, this invention provides a heat exchange device for the production of high-performance silicon-modified acrylic polymers, which aims to improve at least one of the problems mentioned in the background art.

[0004] A heat exchange device for the production of high-performance silicone-modified acrylic polymers is used for the continuous production of high-performance silicone-modified acrylic polymers through polymerization reactions. It includes a first heat exchanger, a second heat exchanger, and a third heat exchanger arranged in sequence. A tubular reactor passes through the first heat exchanger, the second heat exchanger, and the third heat exchanger in sequence. The first heat exchanger is a heater, the second heat exchanger is a radiator, and the third heat exchanger is a heater.

[0005] Optionally, the first heat exchanger includes a first heat exchange box, on which a first inlet pipe and a first outlet pipe are connected; the second heat exchanger includes a second heat exchange box, on which a second inlet pipe and a second outlet pipe are connected; and the third heat exchanger includes a third heat exchange box, on which a third inlet pipe and a third outlet pipe are connected.

[0006] Optionally, the second outlet pipe is connected to a first connecting pipe and a second connecting pipe, the other end of the first connecting pipe is connected to the first inlet pipe, and the other end of the second connecting pipe is connected to the third inlet pipe.

[0007] Optionally, each of the first and second connecting pipes is equipped with an electric regulating valve or a pneumatic regulating valve.

[0008] Optionally, the first heat exchange box, the second heat exchange box, and the third heat exchange box have the same height and width.

[0009] Optionally, the length of the first heat exchanger box: the length of the second heat exchanger box: the length of the third heat exchanger box = 10~20: 50~70: 20~30.

[0010] Optionally, a gap is provided directly between the first heat exchange box and the second heat exchange box, and a gap is provided between the second heat exchange box and the third heat exchange box, with a gap length of 1 to 5 cm.

[0011] Optionally, the first heat exchange box, the second heat exchange box, and the third heat exchange box are made of 304 stainless steel.

[0012] Optionally, the first and third heat exchange boxes are covered with insulation material.

[0013] Beneficial effects:

[0014] This invention addresses the use of different heat exchangers in the initiation zone, chain growth zone, and steady-state zone of a tubular reactor in the production of high-performance silicone-modified acrylic polymers during continuous production. This allows for precise heat control, resulting in a target product with excellent uniformity and high yield after polymerization. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0017] Explanation of reference numerals in the attached drawings: 1. First heat exchanger; 2. Second heat exchanger; 3. Third heat exchanger; 4. Tubular reactor; 5. First heat exchange box; 6. Second heat exchange box; 7. Third heat exchange box; 8. First inlet pipe; 9. First outlet pipe; 10. Second inlet pipe; 11. Second outlet pipe; 12. Third inlet pipe; 13. Third outlet pipe; 14. First connecting pipe; 15. Second connecting pipe. Detailed Implementation

[0018] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an indirect connection through an intermediate medium, or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0019] In the description of this utility model, it should be understood that the terms "upper," "lower," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In the description of this utility model, "a plurality of" means two or more, unless otherwise precisely specified.

[0020] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a particular order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms “comprising” and “having,” and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0022] The technical solution of this utility model will be described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments.

[0023] The inventors, based on their understanding of existing technologies, know that the polymerization reaction of high-performance silicone-modified acrylic polymers requires heating to a certain temperature in the initial stage of the reaction to decompose the initiator and generate free radicals, triggering chain initiation. Monomers then form polymer chains through free radical addition reactions. This process releases a large amount of heat. In the later stages of the reaction, less heat is released, requiring heating to compensate for heat loss and maintain a constant temperature. Because the polymerization reactor operates intermittently, only one heat exchanger is needed to meet the heat exchange requirements at different reaction stages. However, in continuous production (i.e., continuous production in tubular reactors), from a time perspective, there are no distinct initial, middle, and later stages of the reaction. However, in continuous production, the tubular reactor has different regions such as the initiation zone, chain growth zone, and steady-state zone. The initiation zone requires external heating, the chain growth zone requires heat dissipation, and the steady-state zone also requires external heating. A single heat exchanger cannot simultaneously fulfill these functions, leading to low initiation efficiency or excessive decomposition, cross-linking side reactions, and even explosive polymerization in the continuous production polymerization process.

[0024] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0025] A heat exchange device for the production of high-performance silicone-modified acrylic polymers is used for the polymerization reaction of high-performance silicone-modified acrylic polymers. It includes a first heat exchanger 1, a second heat exchanger 2, and a third heat exchanger 3 arranged in sequence. A tubular reactor 4 passes through the first heat exchanger 1, the second heat exchanger 2, and the third heat exchanger 3 in sequence. The first heat exchanger 1 is a heater, the second heat exchanger 2 is a radiator, and the third heat exchanger 3 is a heater.

[0026] By setting up a first heat exchanger 1, a second heat exchanger 2, and a third heat exchanger 3 arranged in sequence, where the first heat exchanger 1 is a heater, the second heat exchanger 2 is a radiator, and the third heat exchanger 3 is a heater, during continuous production, the first heat exchanger 1 provides the initiator to the initiation zone, causing the initiator to decompose and generate free radicals, triggering chain initiation; the second heat exchanger 2 removes the heat generated in the chain growth zone in a timely manner; and the third heat exchanger 3 heats the steady-state zone to compensate for heat loss and maintain a constant temperature, thereby ensuring good thermal balance efficiency, high initiation efficiency, fewer cross-linking side reactions, and avoiding explosive polymerization, thus improving the yield of the target product.

[0027] In one or more specific embodiments of this utility model, the first heat exchanger 1 includes a first heat exchange box 5, to which a first inlet pipe 8 and a first outlet pipe 9 are connected; the second heat exchanger 2 includes a second heat exchange box 6, to which a second inlet pipe 10 and a second outlet pipe 11 are connected; and the third heat exchanger 3 includes a third heat exchange box 7, to which a third inlet pipe 12 and a third outlet pipe 13 are connected. Heat is supplied to the first heat exchange box 5 through the first inlet pipe 8, and the first heat exchange box 5 transfers the heat to the initiation zone of the tubular reactor 4. The first outlet pipe 9 discharges the liquid from the first heat exchange box 5, maintaining a constant temperature in the first heat exchange box 5. Coolant is supplied to the second heat exchange box 6 through the second inlet pipe 10, and the second heat exchange box 6 carries away the heat generated in the chain growth zone of the tubular reactor 4. The second outlet pipe 11 discharges the liquid from the second heat exchange box 6, maintaining a constant temperature in the second heat exchange box 6. Heat is supplied to the third heat exchange box 7 through the third inlet pipe 12. The third heat exchange box 7 provides heat to the steady-state zone of the tubular reactor 4. The third outlet pipe 13 discharges the liquid from the third heat exchange box 7, maintaining the temperature of the third heat exchange box 5 constant.

[0028] In one or more specific embodiments of this utility model, in order to improve thermal efficiency, a first connecting pipe 14 and a second connecting pipe 15 are respectively connected to the second liquid outlet pipe 11. The other end of the first connecting pipe 14 is connected to the first liquid inlet pipe 8, and the other end of the second connecting pipe 15 is connected to the third liquid inlet pipe 12. By using the fluid coming out of the second liquid outlet pipe 11 as the heat source for the first heat exchange box 5 and the third heat exchange box 7, thermal energy is fully utilized, and the remaining fluid coming out of the second liquid outlet pipe 11 is used as the heat source for other processes.

[0029] In one or more specific embodiments of this utility model, an electric regulating valve or a pneumatic regulating valve (not shown in the figure) is installed on the first connecting pipe 14 and the second connecting pipe 15 respectively. The electric regulating valve or the pneumatic regulating valve drives the valve disc and works with the controller to achieve high-precision flow regulation and achieve precise control.

[0030] In one or more specific embodiments of this utility model, for ease of installation, the height and width of the first heat exchange box 5, the second heat exchange box 6 and the third heat exchange box 7 are the same. Furthermore, to obtain better thermal efficiency, the length of the first heat exchange box 5: the length of the second heat exchange box 6: the length of the third heat exchange box 7 = 10~20: 50~70: 20~30.

[0031] In one or more specific embodiments of this utility model, a gap is directly provided between the first heat exchange box 5 and the second heat exchange box 6, and a gap is provided between the second heat exchange box 6 and the third heat exchange box 7, with a gap length of 1 to 5 cm.

[0032] In one or more specific embodiments of this utility model, the first heat exchange box 5, the second heat exchange box 6 and the third heat exchange box 7 are made of 304 stainless steel.

[0033] In one or more specific embodiments of this utility model, in order to prevent heat loss from the first heat exchange box 5 and the third heat exchange box 7, the first heat exchange box 5 and the third heat exchange box 7 are covered with heat insulation material (not shown in the figure).

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A heat exchange device for the production of high-performance silicone-modified acrylic polymers, used for the continuous polymerization reaction of high-performance silicone-modified acrylic polymers, characterized in that, The tubular reactor (4) consists of a first heat exchanger (1), a second heat exchanger (2), and a third heat exchanger (3) arranged in sequence. The first heat exchanger (1) is a heater, the second heat exchanger (2) is a radiator, and the third heat exchanger (3) is a heater.

2. The heat exchange device for the production of high-performance silicon-modified acrylic polymers according to claim 1, characterized in that, The first heat exchanger (1) includes a first heat exchange box (5), on which a first inlet pipe (8) and a first outlet pipe (9) are connected. The second heat exchanger (2) includes a second heat exchange box (6), on which a second inlet pipe (10) and a second outlet pipe (11) are connected. The third heat exchanger (3) includes a third heat exchange box (7), on which a third inlet pipe (12) and a third outlet pipe (13) are connected.

3. The heat exchange device for the production of high-performance silicon-modified acrylic polymers according to claim 2, characterized in that, The second outlet pipe (11) is connected to a first connecting pipe (14) and a second connecting pipe (15). The other end of the first connecting pipe (14) is connected to the first inlet pipe (8), and the other end of the second connecting pipe (15) is connected to the third inlet pipe (12).

4. The heat exchange device for the production of high-performance silicon-modified acrylic polymers according to claim 3, characterized in that, An electric regulating valve or a pneumatic regulating valve is installed on the first connecting pipe (14) and the second connecting pipe (15).

5. The heat exchange device for the production of high-performance silicon-modified acrylic polymers according to claim 2, characterized in that, The first heat exchange box (5), the second heat exchange box (6) and the third heat exchange box (7) have the same height and width.

6. The heat exchange device for the production of high-performance silicon-modified acrylic polymers according to claim 5, characterized in that, The length of the first heat exchange box (5) is: the length of the second heat exchange box (6) is: the length of the third heat exchange box (7) = 10~20: 50~70: 20~30.

7. The heat exchange device for the production of high-performance silicon-modified acrylic polymers according to claim 2, characterized in that, There is a gap between the first heat exchange box (5) and the second heat exchange box (6), and there is a gap between the second heat exchange box (6) and the third heat exchange box (7), with a gap length of 1~5cm.

8. The heat exchange device for the production of high-performance silicon-modified acrylic polymers according to claim 2, characterized in that, The first heat exchange box (5), the second heat exchange box (6) and the third heat exchange box (7) are made of 304 stainless steel.

9. The heat exchange device for the production of high-performance silicon-modified acrylic polymers according to claim 8, characterized in that, The first heat exchange box (5) and the third heat exchange box (7) are covered with heat insulation material.

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