A dicyclopentadiene acrylate production system

Abstract

The application discloses a dicyclopentadiene acrylate preparation system, which comprises a mixer, a reaction preheater, a fixed bed reactor, a reaction kettle, a buffer tank, a first falling film evaporator, a receiving tank, a first cryogenic unit, a recovery solvent tank, a second falling film evaporator, a heavy component tank, a second cryogenic unit and a product tank, wherein the outer wall of the first falling film evaporator is provided with a first heat exchange mechanism for heat exchange through high-temperature energy storage medium, the output port of the first heat exchange mechanism is connected with the second input port of the reaction preheater, and the input port of the first heat exchange mechanism is connected with the second output port of the reaction preheater. In the foregoing manner, the sulfonic acid resin catalyst particles are filled in the fixed bed reactor, the catalyst can be recycled, neutralization treatment of the catalyst is not needed after the reaction, no alkaline wastewater is generated, the environment is not polluted, the heat of the falling film evaporator can be recovered to supply the reaction preheater for preheating, heat energy recovery can be realized, and the energy consumption cost is low.

Description

Technical Field

[0001] This invention relates to the field of dicyclopentadiene acrylate preparation technology, specifically a dicyclopentadiene acrylate preparation system. Background Technology

[0002] Dicyclopentenyl acrylate (DCPA) is a colorless or pale yellow transparent liquid with the molecular formula: C 13 H 16 O2, CAS number 33791-58-1, is a monomer with excellent properties and broad application prospects. Its structure incorporates a large dicyclopentadiene group, resulting in a high glass transition temperature (Tg) for its homopolymer. It exhibits good performance in terms of hardness, water resistance, and transparency, and can be widely used in coatings, adhesives, plastic surfaces, and optical materials that require insulation and high hardness. It is an ideal reactive diluent for photocurable materials.

[0003] Currently, the existing methods for synthesizing DCPA mainly involve slowly adding dicyclopentadiene dropwise to an acrylic acid solution containing a strong acid catalyst to undergo an electrophilic addition reaction to obtain a crude reaction solution, which is then post-treated or vacuum distilled to obtain the product dicyclopentenyl acrylate.

[0004] However, in the traditional method, the synthesis stage of commercially available dicyclopentenyl acrylate often uses a liquid sulfonic acid catalyst, which is used only once and is not recycled. The liquid sulfonic acid catalyst needs to be neutralized with sodium hydroxide aqueous solution and then washed with water, but this easily generates a large amount of alkaline wastewater, polluting the environment. In addition, commercially available dicyclopentenyl acrylate preparation systems consume a lot of energy and have high energy costs. Summary of the Invention

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this invention provides a dicyclopentadiene acrylate preparation system that can solve the aforementioned technical problems.

[0007] (II) Technical Solution

[0008] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a dicyclopentadiene acrylate preparation system, characterized in that it comprises: a mixer for receiving a dicyclopentadiene solution and an acrylic acid solution containing a strong acid catalyst; a reaction preheater, the first inlet of which is connected to the output port of the mixer; a fixed-bed reactor, the bottom inlet of which is connected to the first output port of the reaction preheater, wherein the fixed-bed reactor is filled with an acid catalyst layer, and the acid catalyst layer is composed of sulfonic acid resin catalyst particles; a reaction vessel, the top inlet of which is connected to the top output port of the fixed-bed reactor; a buffer tank, the top inlet of which is connected to the bottom output port of the reaction vessel; a first falling film evaporator, the top inlet of which is connected to the bottom output port of the buffer tank, wherein the temperature of the first falling film evaporator is higher than the temperature of the reaction preheater; a receiving tank, the inlet of which is connected to the bottom output port of the first falling film evaporator; a first cryogenic tank, the inlet of which is connected to the top output port of the receiving tank; and a solvent recovery tank, the top inlet of which is connected to the first output port of the reaction vessel. The output port of the first cryogenic reactor is connected to the following: a second falling film evaporator, the top inlet of which is connected to the bottom output port of the receiving tank, wherein the temperature of the second falling film evaporator is higher than the temperature of the reaction preheater; a heavy component tank, the side wall inlet of which is connected to the bottom output port of the second falling film evaporator; a second cryogenic reactor, the inlet of which is connected to the top output port of the heavy component tank; a product tank, the top inlet of which is connected to the output port of the second cryogenic reactor; wherein the outer wall of the first falling film evaporator is provided with a first heat exchange mechanism for heat exchange through a high-temperature energy storage medium, the output port of the first heat exchange mechanism is connected to the second input port of the reaction preheater through a first insulation pipe, the input port of the first heat exchange mechanism is connected to the second output port of the reaction preheater through a second insulation pipe, wherein the first insulation pipe is provided with a first thermal energy storage tank for containing a high-temperature energy storage medium, and the first insulation pipe is also provided with a first circulation pump to pump the high-temperature energy storage medium in the first thermal energy storage tank to the reaction preheater for heat exchange.

[0009] Furthermore, the reaction preheater is U-shaped, wherein the outer wall of the reaction preheater is provided with a first heat insulation layer, the first heat insulation layer and the outer wall of the reaction preheater form a first heat exchange space, one end of the first heat insulation pipe is connected to the second inlet of one end of the reaction preheater, and the second heat insulation pipe is connected to the second outlet of the other end of the reaction preheater.

[0010] Furthermore, the first heat exchange mechanism includes a second insulation layer disposed on the outer wall of the first falling film evaporator, wherein the second insulation layer and the outer wall of the first falling film evaporator form a second heat exchange space for containing a high-temperature energy storage medium, the other end of the first insulation tube is connected to the top end of the second heat exchange space, and the other end of the second insulation tube is connected to the bottom end of the second heat exchange space.

[0011] Furthermore, the outer wall of the second falling film evaporator is provided with a second heat exchange mechanism for heat exchange through a high-temperature energy storage medium. The output port of the second heat exchange mechanism is connected to the third input port of the reaction preheater through a third insulation pipe, and the input port of the second heat exchange mechanism is connected to the third output port of the reaction preheater through a fourth insulation pipe. The third insulation pipe is provided with a second thermal energy storage tank for containing a high-temperature energy storage medium, and the third insulation pipe is also provided with a second circulation pump to pump the high-temperature energy storage medium in the second thermal energy storage tank to the reaction preheater for heat exchange.

[0012] Furthermore, one end of the third insulation pipe is connected to the third input port at the other end of the reaction preheater, and the fourth insulation pipe is connected to the third output port at one end of the reaction preheater.

[0013] Furthermore, the second heat exchange mechanism includes a third insulation layer disposed on the outer wall of the second falling film evaporator, wherein the third insulation layer and the outer wall of the second falling film evaporator form a third heat exchange space for containing a high-temperature energy storage medium, the other end of the third insulation pipe is connected to the top of the third heat exchange space, and the other end of the fourth insulation pipe is connected to the bottom of the third heat exchange space.

[0014] Furthermore, when the temperature of the high-temperature energy storage medium output from the second heat exchange space is higher than a preset temperature value, the first circulating pump is controlled to operate and the second circulating pump is controlled to stop operating, so that the high-temperature energy storage medium in the second heat exchange space is pumped to the reaction preheater for heat exchange through the first circulating pump. When the temperature of the high-temperature energy storage medium output from the third heat exchange space is higher than a preset temperature value, the second circulating pump is controlled to operate and the first circulating pump is controlled to stop operating, so that the high-temperature energy storage medium in the third heat exchange space is pumped to the reaction preheater for heat exchange through the second circulating pump, or the one with the highest temperature between the first heat exchange mechanism and the second heat exchange mechanism is controlled to pump the high-temperature energy storage medium to the reaction preheater for heating, and the other one with the lower temperature between the first heat exchange mechanism and the second heat exchange mechanism is controlled to stop pumping the high-temperature energy storage medium to the reaction preheater.

[0015] Furthermore, a first switching valve is installed in the first insulation pipe between the first thermal energy storage tank and the first falling film evaporator. When the temperature of the high-temperature energy storage medium output from the second heat exchange space is lower than a preset alarm value, the first switching valve is controlled to close and the first circulation pump is controlled to operate, so as to control the first circulation pump to continue pumping the high-temperature energy storage medium in the first thermal energy storage tank to the reaction preheater for heat exchange. A second switching valve is installed in the third insulation pipe between the second thermal energy storage tank and the second falling film evaporator. When the temperature of the high-temperature energy storage medium output from the third heat exchange space is lower than a preset alarm value, the second switching valve is controlled to close and the second circulation pump is controlled to operate, so as to control the second circulation pump to continue pumping the high-temperature energy storage medium in the second thermal energy storage tank to the reaction preheater for heat exchange.

[0016] Furthermore, it also includes: a circulation pipe, one end of which is connected to the output port at the bottom of the recovery solvent tank, and the other end is connected to the reaction vessel via a third circulation pump, so as to pump the solution in the recovery solvent tank back to the reaction vessel via the third circulation pump.

[0017] Furthermore, the circulation pipe is provided with a third switching valve for controlling the opening and closing of the circulation pipe, and the circulation pipe is also provided with a third one-way valve for allowing the solution in the recovery solvent tank to flow into the reaction vessel.

[0018] (III) Beneficial Effects

[0019] Compared with existing technologies, this invention provides a dicyclopentadiene acrylate preparation system with the following advantages: The dicyclopentadiene acrylate preparation system disclosed in this invention fills a fixed-bed reactor with sulfonic acid resin catalyst particles, allowing for catalyst recycling. No catalyst neutralization treatment is required after the reaction, resulting in no alkaline wastewater and no environmental pollution. Furthermore, this invention performs a first falling film evaporator on the reaction liquid, followed by a second falling film evaporator, enabling high-quality product separation and purification, increasing the product yield by 15%, and further improving the product's color and purity. Simultaneously, this invention recovers heat from the first and second falling film evaporators to preheat the reaction preheater, achieving heat recovery, low energy consumption, and environmental friendliness and energy saving. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the first embodiment of the dicyclopentadiene acrylate preparation system of the present invention;

[0021] Figure 2 This is a schematic diagram of the second embodiment of the dicyclopentadiene acrylate preparation system of the present invention. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] like Figure 1-2 As shown, the dicyclopentadiene acrylate preparation system disclosed in this invention includes a mixer 10, a reaction preheater 11, a fixed-bed reactor 12, a reaction vessel 13, a buffer tank 14, a first falling film evaporator 15, a receiving tank 16, a first cryogenic reactor 17, a solvent recovery tank 18, a second falling film evaporator 19, a heavy component tank 20, a second cryogenic reactor 21, and a product tank 22.

[0024] Mixer 10 is used to receive a dicyclopentadiene solution and an acrylic acid solution containing a strong acid catalyst. It should be understood that the acrylic acid solution and the dicyclopentadiene solution are mixed within mixer 10.

[0025] The first inlet of the reaction preheater 11 is connected to the outlet of the mixer 10.

[0026] The inlet at the bottom of the fixed-bed reactor 12 is connected to the first outlet of the reaction preheater 11. The fixed-bed reactor 12 is filled with an acidic catalyst layer, which is composed of sulfonic acid resin catalyst particles. It should be understood that the mixture heated by the reaction preheater 11 enters the fixed-bed reactor 12 and reacts to form dicyclopentenyl acrylate. Because the acidic catalyst layer of the fixed-bed reactor 12 is composed of sulfonic acid resin catalyst particles, these particles can neutralize the solution after the reaction of acrylic acid and dicyclopentadiene to remove the acidic catalyst. Therefore, no catalyst neutralization treatment is required after the reaction, no alkaline wastewater is generated, and no environmental pollution is caused.

[0027] The top inlet of the reactor 13 is connected to the top outlet of the fixed-bed reactor 12, so that the solution reacts completely in the reactor 13.

[0028] The top inlet of the buffer tank 14 is connected to the bottom outlet of the reactor 13.

[0029] The top inlet of the first falling film evaporator 15 is connected to the bottom outlet of the buffer tank 14, wherein the temperature of the first falling film evaporator 15 is higher than the temperature of the reaction preheater 11.

[0030] The inlet on the side wall of the receiving tank 16 is connected to the bottom outlet of the first falling film evaporator 15.

[0031] The inlet of the first cryogenic unit 17 is connected to the outlet at the top of the receiving tank 16.

[0032] The top inlet of the solvent recovery tank 18 is connected to the outlet of the first cryogenic unit 17.

[0033] It should be understood that the solution output from the first falling film evaporator 15 is relatively hot. Therefore, part of the solution flowing into the receiving tank 16 (the crude product dicyclopentadiene acrylate) will remain at the bottom of the receiving tank 16, while the other part of the water vapor (containing unreacted acrylic acid and dicyclopentadiene) will enter the first cryogenic tank 17 for condensation and eventually flow into the solvent recovery tank 18.

[0034] Furthermore, the dicyclopentadiene acrylate preparation system also includes a circulation tube, one end of which is connected to the output port at the bottom of the recovery solvent tank 18, and the other end of which is connected to the reaction vessel 13 via a third circulation pump. The solution (crude product dicyclopentadiene acrylate and unreacted acrylic acid and dicyclopentadiene) in the recovery solvent tank 18 is pumped back to the reaction vessel 13 for recycling, effectively saving costs.

[0035] Preferably, a third switching valve for controlling the opening and closing of the circulation pipe is provided in the circulation pipe, and a third one-way valve for directing the solution from the solvent recovery tank 18 to the reaction vessel 13 is also provided in the circulation pipe.

[0036] The inlet at the top of the second falling film evaporator 19 is connected to the outlet at the bottom of the receiving tank 16, wherein the temperature of the second falling film evaporator 19 is higher than the temperature of the reaction preheater 11.

[0037] The inlet on the side wall of the heavy component tank 20 is connected to the outlet at the bottom of the second falling film evaporator 19.

[0038] The inlet of the second cryogenic unit 21 is connected to the outlet at the top of the heavy component tank 20.

[0039] The inlet at the top of product tank 22 is connected to the outlet of the second cryogenic cooler 21.

[0040] It should be understood that the solution output from the second falling film evaporator 19 is relatively hot. Therefore, a portion of the solution (heavy components) flowing into the heavy component tank 20 will remain in the heavy component tank 20, while the remaining water vapor (including qualified product dicyclopentadiene acrylate) will enter the second cryostat 21 for condensation and ultimately be contained in the product tank 22. Additionally, the heavy components remaining in the heavy component tank 20 include acrylic polymers and dicyclopentadiene polymers, which, due to their relatively high boiling points, remain in the heavy component tank 20.

[0041] In summary, the present invention performs a first falling film treatment on the reaction liquid using a first falling film evaporator 15, and then performs a second falling film treatment on the reaction liquid using a second falling film evaporator 19, which enables high-quality product separation and purification, increases the product yield by 15%, and further improves the product's color and purity.

[0042] In this embodiment, the outer wall of the first falling film evaporator 15 is provided with a first heat exchange mechanism for heat exchange through a high-temperature energy storage medium (such as water or other energy storage media). The output port of the first heat exchange mechanism is connected to the second input port of the reaction preheater 11 through a first insulation pipe 31, and the input port of the first heat exchange mechanism is connected to the second output port of the reaction preheater 11 through a second insulation pipe 32. This allows the first heat exchange mechanism to exchange heat generated by the first falling film evaporator 15 through the high-temperature energy storage medium (i.e., the high-temperature energy storage medium transfers heat to the reaction preheater 11), thereby heating the reaction preheater 11 with the exchanged heat, recovering heat energy, and reducing energy consumption costs.

[0043] Preferably, the first insulation pipe 31 is equipped with a first thermal energy storage tank 33 for containing a high-temperature energy storage medium. The first insulation pipe 31 is also equipped with a first circulation pump 34 to pump the high-temperature energy storage medium from the first thermal energy storage tank 33 to the reaction preheater 11 for heat exchange. After heat exchange, the high-temperature energy storage medium returns to the first falling film evaporator 15 for further heat storage. It should be understood that the first thermal energy storage tank 33 can store the heat generated by the first falling film evaporator 15 through the high-temperature energy storage medium, enabling the supply of heat energy to the reaction preheater 11 in real time or intermittently as needed.

[0044] In this embodiment, the reaction preheater 11 is U-shaped, and the outer wall of the reaction preheater 11 is provided with a first heat insulation layer. The first heat insulation layer and the outer wall of the reaction preheater 11 form a first heat exchange space. One end of the first heat insulation pipe 31 is connected to the second inlet of one end of the reaction preheater 11, and the second heat insulation pipe 32 is connected to the second outlet of the other end of the reaction preheater 11.

[0045] Furthermore, the first heat exchange mechanism includes a second insulation layer disposed on the outer wall of the first falling film evaporator 15, wherein the second insulation layer and the outer wall of the first falling film evaporator 15 form a second heat exchange space for containing the high-temperature energy storage medium. The other end of the first insulation pipe 31 is connected to the top of the second heat exchange space, and the other end of the second insulation pipe 32 is connected to the bottom of the second heat exchange space. That is to say, when the high-temperature energy storage medium flows into the second heat exchange space, heat exchange will occur, and the thermal energy will be stored in the high-temperature energy storage medium (i.e., the thermal energy of the first falling film evaporator 15 is transferred to the high-temperature energy storage medium).

[0046] In this embodiment, the outer wall of the second falling film evaporator 19 is provided with a second heat exchange mechanism for heat exchange through a high-temperature energy storage medium. The output port of the second heat exchange mechanism is connected to the third input port of the reaction preheater 11 through a third insulation pipe 35, and the input port of the second heat exchange mechanism is connected to the third output port of the reaction preheater 11 through a fourth insulation pipe 36. The third insulation pipe 35 is provided with a second thermal energy storage tank 37 for containing a high-temperature energy storage medium, and the third insulation pipe 35 is also provided with a second circulation pump 38 to pump the high-temperature energy storage medium in the second thermal energy storage tank 37 to the reaction preheater 11 for heat exchange (i.e., the high-temperature energy storage medium transfers heat to the reaction preheater 11), thereby heating the reaction preheater 11 with the exchanged heat, recovering heat energy, and reducing energy consumption costs.

[0047] Preferably, one end of the third insulation pipe 35 is connected to the third inlet port at the other end of the reaction preheater 11, and the fourth insulation pipe 36 is connected to the third outlet port at one end of the reaction preheater 11.

[0048] In other words, the high-temperature energy storage medium that exchanges heat from the first falling film evaporator 15 enters the reaction preheater 11 from one end and then exits from the other end of the reaction preheater 11 after heat transfer. The high-temperature energy storage medium that exchanges heat from the second falling film evaporator 19 enters the reaction preheater 11 from the other end and then exits from one end of the reaction preheater 11 after heat transfer. This makes the heat exchange more uniform and the heat exchange effect better.

[0049] Furthermore, the second heat exchange mechanism includes a third insulation layer disposed on the outer wall of the second falling film evaporator 19. The third insulation layer and the outer wall of the second falling film evaporator 19 form a third heat exchange space for containing the high-temperature energy storage medium. The other end of the third insulation pipe 35 is connected to the top of the third heat exchange space, and the other end of the fourth insulation pipe 36 is connected to the bottom of the third heat exchange space. In other words, when the high-temperature energy storage medium flows into the third heat exchange space, heat exchange occurs, storing the thermal energy in the high-temperature energy storage medium (i.e., the thermal energy of the second falling film evaporator 19 is transferred to the high-temperature energy storage medium).

[0050] In this embodiment, when the temperature of the high-temperature energy storage medium output from the second heat exchange space is higher than a preset temperature value (manually set), the first circulation pump 34 is controlled to operate and the second circulation pump 38 is controlled to stop operating, so that the high-temperature energy storage medium in the second heat exchange space is pumped to the reaction preheater 11 for heat exchange through the first circulation pump 34. When the temperature of the high-temperature energy storage medium output from the third heat exchange space is higher than the preset temperature value, the second circulation pump 38 is controlled to operate and the first circulation pump 34 is controlled to stop operating, so that the high-temperature energy storage medium in the third heat exchange space is pumped to the reaction preheater 11 for heat exchange through the second circulation pump 38. That is to say, the first circulation pump 34 and the second circulation pump 38 do not operate simultaneously. Whichever falling film evaporator produces a higher temperature is used to heat the reaction preheater 11, which provides high flexibility.

[0051] Of course, in some embodiments, the one with the higher temperature between the first heat exchanger and the second heat exchanger is controlled to pump the high-temperature energy storage medium into the reaction preheater 11 for heating, while the other one with the lower temperature is controlled to stop pumping the high-temperature energy storage medium into the reaction preheater 11.

[0052] Furthermore, a first switching valve is installed in the first insulation pipe 31 between the first thermal energy storage tank 33 and the first falling film evaporator 15. When the temperature of the high-temperature energy storage medium output from the second heat exchange space is lower than a preset alarm value, the first switching valve is closed and the first circulation pump 34 is activated to continue pumping the high-temperature energy storage medium in the first thermal energy storage tank 33 to the reaction preheater 11 for heat exchange. In other words, when the temperature of the first falling film evaporator 15 is relatively low, heat exchange will be suspended, but the high-temperature energy storage medium stored in the first thermal energy storage tank 33 will continue to heat the reaction preheater 11.

[0053] Furthermore, a second switching valve is installed in the third insulation pipe 35 between the second thermal energy storage tank 37 and the second falling film evaporator 19. When the temperature of the high-temperature energy storage medium output from the third heat exchange space is lower than a preset alarm value, the second switching valve is closed and the second circulation pump 38 is activated to continue pumping the high-temperature energy storage medium in the second thermal energy storage tank 37 to the reaction preheater 11 for heat exchange. In other words, when the temperature of the second falling film evaporator 19 is relatively low, heat exchange will be suspended, but the high-temperature energy storage medium stored in the second thermal energy storage tank 37 will continue to heat the reaction preheater 11.

[0054] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0055] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A system for preparing dicyclopentadiene acrylate, characterized in that, include: A mixer for receiving a dicyclopentadiene solution and an acrylic acid solution containing a strong acid catalyst; A reaction preheater, the first inlet of which is connected to the output port of the mixer; A fixed-bed reactor, the inlet of which is connected to the first outlet of the reaction preheater, wherein the fixed-bed reactor is filled with an acidic catalyst layer, and the acidic catalyst layer is composed of sulfonic acid resin catalyst particles. The reactor vessel has its top inlet connected to the top outlet of the fixed-bed reactor. A buffer tank, the top inlet of which is connected to the bottom outlet of the reactor; The first falling film evaporator has its top inlet connected to the bottom outlet of the buffer tank, wherein the temperature of the first falling film evaporator is higher than the temperature of the reaction preheater. The receiving tank has its side wall inlet connected to the bottom outlet of the first falling film evaporator; The first cryogenic device has its inlet connected to the outlet at the top of the receiving tank; A solvent recovery tank, the top inlet of which is connected to the output port of the first cryostat; The second falling film evaporator has its top inlet connected to the bottom outlet of the receiving tank, wherein the temperature of the second falling film evaporator is higher than the temperature of the reaction preheater. The input port on the side wall of the recombinant tank is connected to the output port at the bottom of the second falling film evaporator; The second cryogenic device has its inlet connected to the outlet at the top of the heavy component tank; The product tank has an inlet at the top that is connected to the outlet of the second cryogenic unit; The outer wall of the first falling film evaporator is provided with a first heat exchange mechanism for heat exchange through a high-temperature energy storage medium. The output port of the first heat exchange mechanism is connected to the second input port of the reaction preheater through a first insulation pipe, and the input port of the first heat exchange mechanism is connected to the second output port of the reaction preheater through a second insulation pipe. The first insulation pipe is provided with a first thermal energy storage tank for containing a high-temperature energy storage medium, and the first insulation pipe is also provided with a first circulation pump to pump the high-temperature energy storage medium in the first thermal energy storage tank to the reaction preheater for heat exchange.

2. The dicyclopentadiene acrylate preparation system according to claim 1, characterized in that, The reaction preheater is U-shaped, and the outer wall of the reaction preheater is provided with a first heat insulation layer. The first heat insulation layer and the outer wall of the reaction preheater form a first heat exchange space. One end of the first heat insulation pipe is connected to the second inlet of one end of the reaction preheater, and the second heat insulation pipe is connected to the second outlet of the other end of the reaction preheater.

3. The dicyclopentadiene acrylate preparation system according to claim 2, characterized in that, The first heat exchange mechanism includes a second insulation layer disposed on the outer wall of the first falling film evaporator, wherein the second insulation layer and the outer wall of the first falling film evaporator form a second heat exchange space for containing a high-temperature energy storage medium, the other end of the first insulation tube is connected to the top of the second heat exchange space, and the other end of the second insulation tube is connected to the bottom of the second heat exchange space.

4. The dicyclopentadiene acrylate preparation system according to claim 3, characterized in that, The outer wall of the second falling film evaporator is provided with a second heat exchange mechanism for heat exchange through a high-temperature energy storage medium. The output port of the second heat exchange mechanism is connected to the third input port of the reaction preheater through a third insulation pipe. The input port of the second heat exchange mechanism is connected to the third output port of the reaction preheater through a fourth insulation pipe. The third insulation pipe is provided with a second thermal energy storage tank for containing a high-temperature energy storage medium. The third insulation pipe is also provided with a second circulation pump to pump the high-temperature energy storage medium in the second thermal energy storage tank to the reaction preheater for heat exchange.

5. The dicyclopentadiene acrylate preparation system according to claim 4, characterized in that, One end of the third insulation pipe is connected to the third inlet at the other end of the reaction preheater, and the fourth insulation pipe is connected to the third outlet at one end of the reaction preheater.

6. The dicyclopentadiene acrylate preparation system according to claim 4, characterized in that, The second heat exchange mechanism includes a third insulation layer disposed on the outer wall of the second falling film evaporator, wherein the third insulation layer and the outer wall of the second falling film evaporator form a third heat exchange space for containing a high-temperature energy storage medium, the other end of the third insulation tube is connected to the top of the third heat exchange space, and the other end of the fourth insulation tube is connected to the bottom of the third heat exchange space.

7. The dicyclopentadiene acrylate preparation system according to claim 6, characterized in that, When the temperature of the high-temperature energy storage medium output from the second heat exchange space is higher than the preset temperature value, the first circulation pump is controlled to operate and the second circulation pump is controlled to stop operating, so that the high-temperature energy storage medium in the second heat exchange space is pumped to the reaction preheater for heat exchange through the first circulation pump. When the temperature of the high-temperature energy storage medium output from the third heat exchange space is higher than the preset temperature value, the second circulation pump is controlled to operate and the first circulation pump is controlled to stop operating, so that the high-temperature energy storage medium in the third heat exchange space is pumped to the reaction preheater for heat exchange through the second circulation pump, or the one with the higher temperature between the first heat exchange mechanism and the second heat exchange mechanism is controlled to pump the high-temperature energy storage medium to the reaction preheater for heating, and the other one with the lower temperature between the first heat exchange mechanism and the second heat exchange mechanism is controlled to stop pumping the high-temperature energy storage medium to the reaction preheater.

8. The dicyclopentadiene acrylate preparation system according to claim 6, characterized in that, A first switching valve is installed in the first insulation pipe between the first thermal energy storage tank and the first falling film evaporator. When the temperature of the high-temperature energy storage medium output from the second heat exchange space is lower than a preset alarm value, the first switching valve is controlled to close and the first circulation pump is controlled to operate, so that the first circulation pump continues to pump the high-temperature energy storage medium in the first thermal energy storage tank to the reaction preheater for heat exchange. A second switching valve is installed in the third insulation pipe between the second thermal energy storage tank and the second falling film evaporator. When the temperature of the high-temperature energy storage medium output from the third heat exchange space is lower than a preset alarm value, the second switching valve is controlled to close and the second circulation pump is controlled to operate, so that the second circulation pump continues to pump the high-temperature energy storage medium in the second thermal energy storage tank to the reaction preheater for heat exchange.

9. The dicyclopentadiene acrylate preparation system according to claim 4, characterized in that, Also includes: The circulation tube has one end connected to the output port at the bottom of the solvent recovery tank, and the other end connected to the reactor via a third circulation pump, so that the solution in the solvent recovery tank can be pumped back to the reactor via the third circulation pump.

10. The dicyclopentadiene acrylate preparation system according to claim 9, characterized in that, The circulation pipe is equipped with a third switching valve for controlling the opening and closing of the circulation pipe, and the circulation pipe is also equipped with a third one-way valve for allowing the solution in the recovery solvent tank to flow into the reaction vessel.

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