Resin production device

Abstract

The utility model belongs to the technical field of resin production and discloses a resin production device which comprises a titration tank, a reaction kettle, a heat exchanger and a condenser, and the titration tank is communicated with the reaction kettle and used for conveying materials to the reaction kettle; the reaction kettle is connected with an exhaust pipe, the exhaust pipe is connected with a first exhaust branch pipe, and one end of the first exhaust branch pipe deviating from the exhaust pipe is connected with the heat exchanger; the condenser selectively communicates with the heat exchanger, the exhaust pipe is connected with a second exhaust branch pipe, and the end, away from the exhaust pipe, of the second exhaust branch pipe is connected with the condenser. Therefore, by additionally arranging the titration tank, raw materials and a catalyst required for preparing an acrylic acid product can be conveyed into the reaction kettle through the titration tank and are separated from raw materials and a catalyst for preparing an alcohol acid product, so that pollution is avoided; the first exhaust branch pipe and the second exhaust branch pipe can control gas in the reaction kettle to directly enter the condenser or enter the condenser through the heat exchanger so as to adapt to production of different products, and the utilization rate of the resin production device is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of resin production, in particular to a resin production device. Background Art

[0002] Resin usually refers to an organic polymer that softens or melts when heated, tends to flow under the action of external force when softened, and is solid, semi-solid or liquid at room temperature.

[0003] The resin production device includes a reactor, a heat exchanger, a condenser and a water-oil separator. When producing alkyd products (for example, alkyd resin, polyester resin), raw materials and catalysts are added to the reactor for reaction. The mixture of alcohol and water that has not reacted completely in the reactor enters the heat exchanger for cooling. Since the boiling point of the alcohol that has not reacted completely is higher than that of water, water enters the condenser for further condensation. The alcohol that has not reacted completely is cooled by the heat exchanger and then returns to the reactor to continue reacting, thereby realizing the production of alkyd products.

[0004] Since the preparation process and technology of different types of resin products are different, when preparing acrylic acid products, the mixture of acrylic acid and water vapor generated after the reaction of raw materials and catalysts needs to directly enter the condenser for cooling. The resin production equipment used to make alkyd products is difficult to use for the preparation of acrylic acid products. It is necessary to set up a separate resin production equipment for the preparation of acrylic acid products. There are problems such as the products that can be produced by the resin production equipment are relatively single and the utilization rate of the equipment is low. Utility Model Content

[0005] The utility model aims to provide a resin production device to solve the problem that the products produced by the resin production device are relatively single and the utilization rate of the device is low.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] A resin production device comprises: a titration tank; a reactor, the titration tank is connected to the reactor and is used to transport materials to the reactor; a heat exchanger, the reactor is connected to an exhaust pipe, the exhaust pipe is connected to a first exhaust branch pipe, the end of the first exhaust branch pipe facing away from the exhaust pipe is connected to the heat exchanger, so that the reactor can be selectively connected to the heat exchanger through the first exhaust branch pipe; a condenser, the condenser can be selectively connected to the heat exchanger, the exhaust pipe is connected to a second exhaust branch pipe, the end of the second exhaust branch pipe facing away from the exhaust pipe is connected to the condenser, so that the reactor can be selectively connected to the condenser through the second exhaust branch pipe.

[0008] Preferably, the first exhaust branch pipe is provided with a first exhaust valve for selectively connecting the heat exchanger with the reactor; and / or, the second exhaust branch pipe is provided with a second exhaust valve for selectively connecting the condenser with the reactor.

[0009] Preferably, the reactor is connected to a drain pipe, and one end of the drain pipe facing away from the reactor is connected to the condenser, so that the reactor can be selectively connected to the condenser through the drain pipe.

[0010] Preferably, the resin production device also includes an oil-water separation tank, the condenser is connected to a first drain branch pipe, and the end of the first drain branch pipe facing away from the condenser is connected to the oil-water separation tank, so that the condenser can be selectively connected to the oil-water separation tank through the first drain branch pipe, and the end of the first drain branch pipe facing away from the condenser is selectively connected to the drain pipe, and the end of the drain pipe facing away from the reactor is connected to the oil-water separation tank, so that the oil-water separation tank and the reactor can be selectively connected through the drain pipe.

[0011] Preferably, the resin production device further comprises a waste liquid tank, and the waste liquid tank is selectively connected to the oil-water separation tank.

[0012] Preferably, the condenser is connected to a second drain branch pipe, one end of the second drain branch pipe is connected to the first drain branch pipe, and the other end is connected to the drain pipe, for discharging the liquid in the condenser into the reactor through the second drain branch pipe and the drain pipe.

[0013] Preferably, an isolation valve is provided at one end of the drain pipe toward the oil-water separation tank, and the isolation valve is arranged upstream of the connection point between the second drain branch pipe and the drain pipe, for enabling the oil-water separation tank to be selectively connected to the condenser.

[0014] Preferably, the resin production device further comprises a first cooling element, which is connected to the condenser and is used to reduce the internal temperature of the condenser; and / or, the resin production device further comprises a second cooling element, which is connected to the heat exchanger and is used to reduce the internal temperature of the heat exchanger.

[0015] Preferably, the resin production device includes a first cooling element, which includes a first cooling water pipeline and a chilled water pipeline, the first cooling water pipeline and the chilled water pipeline are both connected to the condenser, and the liquid temperature at the input end of the chilled water pipeline is lower than the liquid temperature at the input end of the first cooling water pipeline.

[0016] Preferably, the heat exchanger is connected to a circulation pipe, one end of the circulation pipe away from the heat exchanger is connected to the reactor, and a circulation valve is provided on the circulation pipe for selectively connecting the circulation pipe and the reactor.

[0017] Beneficial effects of the utility model:

[0018] A resin production device comprises a titration tank, a reactor, a heat exchanger and a condenser, wherein the titration tank is connected to the reactor and is used to transport materials to the reactor; the reactor is connected to an exhaust pipe, the exhaust pipe is connected to a first exhaust branch pipe, the end of the first exhaust branch pipe facing away from the exhaust pipe is connected to the heat exchanger, so that the reactor can be selectively connected to the heat exchanger through the first exhaust branch pipe; the condenser is selectively connected to the heat exchanger, the exhaust pipe is connected to a second exhaust branch pipe, the end of the second exhaust branch pipe facing away from the exhaust pipe is connected to the condenser, so that the reactor can be selectively connected to the condenser through the second exhaust branch pipe.

[0019] In this way, by setting up a titration tank, the raw materials and catalysts required for producing acrylic acid products can be transported to the reactor through the titration tank, avoiding contact with the raw materials and catalysts for making alkyd products and causing pollution; when producing acrylic acid products, the mixture of acrylic acid and water vapor in the reactor can directly enter the condenser through the second exhaust branch pipe, and when producing alkyd products, the mixture of unreacted alkyd and water vapor first enters the heat exchanger for cooling through the first exhaust branch pipe, and then enters the condenser for further cooling, so that the resin production device can produce different resin products, thereby improving the device utilization rate of the resin production device. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of a resin production device in one embodiment of the utility model.

[0021] In the figure:

[0022] 1. Titration tank; 11. Burette; 2. Reactor; 21. Exhaust pipe; 211. First exhaust branch pipe; 212. Second exhaust branch pipe; 22. Drain pipe; 23. Output pipe; 3. Heat exchanger; 31. Transport pipe; 32. Circulation pipe; 4. Condenser; 41. First drain branch pipe; 42. Second drain branch pipe; 5. Oil-water separation tank; 51. Waste liquid pipe; 6. Waste liquid tank.

[0023] The direction of the arrow in the figure is the flow direction of gas or liquid in the corresponding pipeline. DETAILED DESCRIPTION

[0024] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0025] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" 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 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 the present invention can be understood according to specific circumstances.

[0026] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0027] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0028] See also Figure 1The utility model provides a resin production device, including a titration tank 1, a reactor 2, a heat exchanger 3 and a condenser 4. The titration tank 1 is connected to the reactor 2 and is used to transport materials to the reactor 2; the reactor 2 is connected to an exhaust pipe 21, the exhaust pipe 21 is connected to a first exhaust branch pipe 211, and the end of the first exhaust branch pipe 211 away from the exhaust pipe 21 is connected to the heat exchanger 3, so that the reactor 2 can be selectively connected to the heat exchanger 3 through the first exhaust branch pipe 211; the condenser 4 is selectively connected to the heat exchanger 3, the exhaust pipe 21 is connected to a second exhaust branch pipe 212, and the end of the second exhaust branch pipe 212 away from the exhaust pipe 21 is connected to the condenser 4, so that the reactor 2 can be selectively connected to the condenser 4 through the second exhaust branch pipe 212.

[0029] In this embodiment, two titration tanks 1 are provided, and the two titration tanks 1 are respectively connected to a burette 11, and the end of the burette 11 away from the titration tank 1 is connected to the reactor 2, so that the titration tank 1 is connected to the reactor 2 through the corresponding burette 11, and each burette 11 is provided with a titration valve (not shown in the figure) for controlling the titration tank 1 to be selectively connected to the reactor 2; the reactor 2 is also connected to a feeding tube (not shown in the figure).

[0030] Furthermore, the heat exchanger 3 is connected to a transport pipe 31, and one end of the transport pipe 31 facing away from the heat exchanger 3 is connected to the condenser 4. A transport valve (not shown in the figure) is provided on the transport pipe 31, which is used to selectively connect the heat exchanger 3 and the condenser 4; an output pipe 23 is connected to the bottom of the reactor 2, and the output pipe 23 is selectively connected to the reactor 2 for discharging the substances in the reactor 2.

[0031] It should be noted that the two titration tanks 1 are respectively used to transport the raw materials and catalysts used for producing acrylic acid products to the reactor 2, and the feeding pipe is used to transport the raw materials and catalysts used for producing alkyd products to the reactor 2. When producing one of the products, the pipeline for transporting the raw materials and catalysts of the other product is not connected to the reactor 2, so that the different raw materials and catalysts can avoid mutual influence; when producing alkyd products, the mixture of unreacted alcohols and water vapor enters the heat exchanger 3 through the first exhaust branch pipe 211, and is preliminarily cooled under the action of the heat exchanger 3, and part of the unreacted alcohols are separated. The heat exchanger 3 is connected to the reactor 2, so that the unreacted alcohols can be circulated to the reactor 2 for continuous reaction, and the water vapor carrying part of the unreacted alcohols enters the condenser 4 for continuous cooling; when producing acrylic acid products, the heat exchanger 3 is not connected to the reactor 2, and the condenser 4 is not connected to the heat exchanger 3, and the water vapor carrying acrylic acid can directly enter the condenser 4 through the second exhaust branch pipe 212, and the acrylic acid solution is obtained under the cooling action of the condenser 4.

[0032] In this way, the titration tank 1 can transport the raw materials and catalysts required for producing acrylic acid products into the reactor 2, thereby distinguishing them from the raw materials and catalysts for making alkyd products to avoid pollution; by setting the first exhaust branch pipe 211 and the second exhaust branch pipe 212, the gas mixture paths generated by the reactor 2 when making different products are also different, and the connectivity between the heat exchanger 3 and the reactor 2, and the connectivity between the condenser 4 and the heat exchanger 3 can be adjusted as needed to adapt to the production of different products, so that the resin production device can produce both alkyd products and acrylic acid products, thereby improving the device utilization rate of the resin production device.

[0033] It is understandable that valves may be provided on the feeding pipe and the output pipe 23 to adjust the connection with the reaction kettle 2 according to actual needs; the number of titration tanks 1 may be adjusted according to actual production needs, which will not be listed in detail here.

[0034] See also Figure 1 In some embodiments, a first exhaust valve (not shown in the figure) is provided on the first exhaust branch pipe 211, which is used to selectively connect the heat exchanger 3 with the reactor 2, and a second exhaust valve (not shown in the figure) is provided on the second exhaust branch pipe 212, which is used to selectively connect the condenser 4 with the reactor 2. Further, the heat exchanger 3 is connected to a circulation pipe 32, and one end of the circulation pipe 32 away from the heat exchanger 3 is connected to the reactor 2, and a circulation valve (not shown in the figure) is provided on the circulation pipe 32, which is used to selectively connect the circulation pipe 32 with the reactor 2.

[0035] It should be noted that, when producing acrylic acid products, the first exhaust valve is closed, the transport valve is closed, and the second exhaust valve is opened, so that the mixed gas of acrylic acid and water vapor produced in the reactor 2 is discharged into the condenser 4 through the second exhaust branch pipe 212; when producing alkyd products, the first exhaust valve is opened, the transport valve is opened, and the second exhaust valve is closed, and the mixture of unreacted alcohols and water vapor enters the heat exchanger 3 for cooling, and opening the circulation valve can allow part of the unreacted alcohols separated after cooling to enter the reactor 2, and the other part of the unreacted alcohols and water vapor enter the condenser 4 through the transport pipe 31 for continued cooling.

[0036] In this way, by opening or closing the first exhaust valve, the second exhaust valve and the transport valve, the connection between the reaction kettle 2 and the condenser 4 can be controlled to adapt to the production of various resin products and improve the utilization rate of the device.

[0037] See also Figure 1 In some embodiments, the reactor 2 is connected to a drain pipe 22 , and one end of the drain pipe 22 facing away from the reactor 2 is connected to the condenser 4 , so that the reactor 2 can be selectively connected to the condenser 4 through the drain pipe 22 .

[0038] Among them, there is a main drainage valve (not shown in the figure) at one end of the drainage pipe 22 facing the reactor 2, which is used to control the connection between the drainage pipe 22 and the condenser 4.

[0039] In this way, when producing acrylic acid products, the main drain valve is opened, and the mixture of acrylic acid and water vapor enters the condenser 4 through the second exhaust branch pipe 212 and can enter the reactor 2 through the drain pipe 22 to continue the reaction after cooling; when producing alkyd products, closing the main drain valve can prevent the unseparated mixture output from the condenser 4 from directly entering the reactor 2. After the mixture is separated, the main drain valve is opened, and the unreacted alcohol can enter the reactor 2 through the drain pipe 22 to continue the reaction, thereby improving the preparation efficiency and output of acrylic acid products and alkyd products, and improving the utilization rate of the resin production equipment.

[0040] See also Figure 1 In some embodiments, the resin production device further includes an oil-water separation tank 5, the condenser 4 is connected to a first drainage branch pipe 41, and the end of the first drainage branch pipe 41 away from the condenser 4 is connected to the oil-water separation tank 5, so that the condenser 4 can be selectively connected to the oil-water separation tank 5 through the first drainage branch pipe 41, and the end of the first drainage branch pipe 41 away from the condenser 4 is selectively connected to the drain pipe 22, and the end of the drain pipe 22 away from the reactor 2 is connected to the oil-water separation tank 5, so that the oil-water separation tank 5 and the reactor 2 can be selectively connected through the drain pipe 22.

[0041] In this embodiment, a first drain valve (not shown in the figure) is provided on the first drain branch pipe 41 for controlling the communication between the condenser 4 and the oil-water separation tank 5 .

[0042] Thus, when producing acrylic acid products, the first drain valve is closed to connect the first drain branch pipe 41 with the drain pipe 22, but not with the oil-water separation tank 5, and the acrylic acid solution outputted from the condenser 4 enters the reactor 2 through the first drain branch pipe 41 and the drain pipe 22 to continue the reaction; when producing alkyd products, the first drain valve is opened to connect the first drain branch pipe 41 with the oil-water separation tank 5, but not directly with the drain pipe 22, and the mixture of unreacted alcohol and water outputted from the condenser 4 enters the oil-water separation tank 5 for separation, and the main drain valve is opened to allow the separated unreacted alcohol to enter the reactor 2 through the main drain pipe to continue the reaction, and the oil-water separation tank 5 can be selectively connected to the condenser 4 according to production needs, so as to produce a variety of resin products and improve the device utilization rate of the resin production device.

[0043] See also Figure 1In some embodiments, the condenser 4 is connected to a second drain branch pipe 42, one end of the second drain branch pipe 42 is connected to the first drain branch pipe 41, and the other end is connected to the drain pipe 22, which is used to discharge the liquid in the condenser 4 into the reactor 2 through the second drain branch pipe 42 and the drain pipe 22.

[0044] In this embodiment, a second drain valve (not shown in the figure) is provided on the second drain branch pipe 42, and the connecting point between the second drain branch pipe 42 and the first drain branch pipe 41 is located upstream of the first drain valve, and the connecting point between the second drain branch pipe 42 and the drain pipe 22 is located at one end of the drain pipe 22 facing the oil-water separation tank 5.

[0045] It should be noted that when producing acrylic acid products, closing the first drain valve and opening the second drain valve and the main drain valve can allow the acrylic acid solution in the condenser 4 to flow into the reactor 2 through the first drain branch pipe 41, the second drain branch pipe 42, and the drain pipe 22; when producing alkyd products, closing the second drain valve and opening the first drain valve and the main drain valve can allow the mixture of unreacted alcohols and water to be separated through the oil-water separation tank 5 before entering the drain pipe 22.

[0046] In this way, by setting the first drain valve and the second drain valve, it is possible to prevent part of the acrylic acid solution from entering the oil-water separation tank 5 when producing acrylic acid products, and to prevent part of the mixture from entering the drain pipe 22 directly through the second drain branch pipe 42 without passing through the oil-water separation tank 5 when producing alkyd products, thereby avoiding affecting the normal production of acrylic acid products and alkyd products, enabling the resin production device to produce a variety of resin products and improving the utilization rate of the device.

[0047] See also Figure 1 In some embodiments, the resin production device further includes a waste liquid tank 6 , which is selectively connected to the oil-water separation tank 5 .

[0048] In this embodiment, a waste liquid pipe 51 is connected to the bottom of the oil-water separation tank 5, and one end of the waste liquid pipe 51 facing away from the oil-water separation tank 5 is connected to the waste liquid tank 6. A waste liquid valve (not shown in the figure) is provided on the waste liquid pipe 51 to control the connectivity between the oil-water separation tank 5 and the waste liquid tank 6.

[0049] In this way, when producing alkyd products, the waste liquid valve is opened, and the waste water separated in the oil-water separation tank 5 can be discharged into the waste liquid tank 6 in time through the waste liquid pipe 51, avoiding the accumulation of waste water in the oil-water separation tank 5 and affecting subsequent production.

[0050] See also Figure 1 In some embodiments, an isolation valve is provided at one end of the drain pipe 22 facing the oil-water separation tank 5, and the isolation valve is provided upstream of the connection point between the second drain branch pipe 42 and the drain pipe 22, so as to enable the oil-water separation tank 5 to be selectively connected with the condenser 4.

[0051] In this way, when producing acrylic acid products, closing the isolation valve can prevent the acrylic acid solution from entering the oil-water separation tank 5 through the drain pipe 22 and affecting the normal production of the acrylic acid product. When producing alkyd products, opening the isolation valve can allow the unreacted alcohol separated in the oil-water separation tank 5 to be discharged into the reactor 2 through the drain pipe 22 to continue the reaction, so that the acrylic acid solution or the unreacted alcohol is directionally discharged into the reactor 2, thereby improving the production efficiency and enabling the resin production device to produce a variety of resin products.

[0052] See also Figure 1 In some embodiments, the resin production device also includes a first cooling element (not shown in the figure) and a second cooling element (not shown in the figure), the first cooling element is connected to the condenser 4, and is used to reduce the internal temperature of the condenser 4, and the second cooling element is connected to the heat exchanger 3, and is used to reduce the internal temperature of the heat exchanger 3.

[0053] In this way, under the action of the first cooling element and the second cooling element, the mixture in the heat exchanger 3 and the mixture in the condenser 4 can be fully cooled, and the preparation of the required products can be achieved, so that the resin production device can produce a variety of resin products and improve the utilization rate of the device.

[0054] See also Figure 1 In some embodiments, the first cooling element includes a first cooling water pipeline and a chilled water pipeline, both of which are connected to the condenser 4, and the liquid temperature at the input end of the chilled water pipeline is lower than the liquid temperature at the input end of the first cooling water pipeline.

[0055] It should be noted that, since a large amount of heat is released when the monomer and catalyst are mixed during the acrylic acid titration process, the temperature of the resulting mixture of acrylic acid and water vapor is relatively high. Therefore, the acrylic acid needs a coolant with a lower temperature to cool it down to a suitable temperature.

[0056] In this embodiment, the temperature of the liquid in the input end of the first cooling water pipeline is room temperature, and the temperature of the liquid in the input end of the chilled water pipeline is 10°. The first cooling water pipeline and the chilled water pipeline are both arranged in the form of coils inside the condenser 4 to cool the mixture of acrylic acid and water vapor in the condenser 4. The second cooling member includes a second cooling water pipeline, which is connected to the top of the heat exchanger 3 and is used to cool the mixture of unreacted alcohols and water vapor in the heat exchanger 3, so that the unreacted alcohols are liquefied and stored at the bottom of the heat exchanger 3. Furthermore, the temperature of the liquid at the input end of the first cooling water pipeline is the same as the temperature of the liquid at the input end of the second cooling water pipeline.

[0057] In this way, the cooling temperature of the condenser 4 can be flexibly adjusted according to production needs and the types of resin products produced, so that the mixture of acrylic acid and water vapor can be fully cooled under the action of the chilled water pipeline, thereby improving the production efficiency of acrylic acid products, enabling the resin production equipment to maintain good production efficiency when producing a variety of resin products, and improving the equipment utilization rate of the resin production equipment.

[0058] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A resin production device, characterized in that: include: Titration tank (1); A reaction kettle (2), wherein the titration tank (1) is connected to the reaction kettle (2) and is used to transport materials to the reaction kettle (2); The reactor (2) is connected to an exhaust pipe (21), the exhaust pipe (21) is connected to a first exhaust branch pipe (211), and one end of the first exhaust branch pipe (211) away from the exhaust pipe (21) is connected to the heat exchanger (3), so that the reactor (2) can be selectively connected to the heat exchanger (3) through the first exhaust branch pipe (211); A condenser (4), the condenser (4) being selectively connected to the heat exchanger (3), the exhaust pipe (21) being connected to a second exhaust branch pipe (212), the end of the second exhaust branch pipe (212) facing away from the exhaust pipe (21) being connected to the condenser (4), so that the reaction kettle (2) is selectively connected to the condenser (4) through the second exhaust branch pipe (212).

2. The resin production device according to claim 1, characterized in that: The first exhaust branch pipe (211) is provided with a first exhaust valve for selectively connecting the heat exchanger (3) and the reactor (2); and / or the second exhaust branch pipe (212) is provided with a second exhaust valve for selectively connecting the condenser (4) and the reactor (2).

3. The resin production device according to claim 1, characterized in that: The reactor (2) is connected to a drain pipe (22), and one end of the drain pipe (22) facing away from the reactor (2) is connected to the condenser (4), so that the reactor (2) can be selectively connected to the condenser (4) through the drain pipe (22).

4. The resin production device according to claim 3, characterized in that: The resin production device also includes an oil-water separation tank (5), the condenser (4) is connected to a first drainage branch pipe (41), and the end of the first drainage branch pipe (41) facing away from the condenser (4) is connected to the oil-water separation tank (5), so that the condenser (4) can be selectively connected to the oil-water separation tank (5) through the first drainage branch pipe (41), and the end of the first drainage branch pipe (41) facing away from the condenser (4) is selectively connected to the drainage pipe (22), and the end of the drainage pipe (22) facing away from the reactor (2) is connected to the oil-water separation tank (5), so that the oil-water separation tank (5) and the reactor (2) can be selectively connected through the drainage pipe (22).

5. The resin production device according to claim 4, characterized in that: The resin production device further comprises a waste liquid tank (6), and the waste liquid tank (6) is selectively connected to the oil-water separation tank (5).

6. The resin production device according to claim 4, characterized in that: The condenser (4) is connected to a second drainage branch pipe (42), one end of the second drainage branch pipe (42) is connected to the first drainage branch pipe (41), and the other end is connected to the drainage pipe (22), and is used to discharge the liquid in the condenser (4) into the reactor (2) through the second drainage branch pipe (42) and the drainage pipe (22).

7. The resin production device according to claim 6, characterized in that: An isolation valve is provided at one end of the drain pipe (22) facing the oil-water separation tank (5). The isolation valve is provided upstream of the connection point between the second drain branch pipe (42) and the drain pipe (22) and is used to selectively connect the oil-water separation tank (5) and the condenser (4).

8. The resin production device according to any one of claims 1 to 7, characterized in that: The resin production device further comprises a first cooling element, which is connected to the condenser (4) and is used to reduce the internal temperature of the condenser (4); and / or the resin production device further comprises a second cooling element, which is connected to the heat exchanger (3) and is used to reduce the internal temperature of the heat exchanger (3).

9. The resin production device according to any one of claims 1 to 7, characterized in that: The resin production device comprises a first cooling element, the first cooling element comprises a first cooling water pipeline and a chilled water pipeline, the first cooling water pipeline and the chilled water pipeline are both connected to the condenser (4), and the liquid temperature at the input end of the chilled water pipeline is lower than the liquid temperature at the input end of the first cooling water pipeline.

10. The resin production device according to any one of claims 1 to 7, characterized in that: The heat exchanger (3) is connected to a circulation pipe (32), one end of the circulation pipe (32) away from the heat exchanger (3) is connected to the reactor (2), and a circulation valve is provided on the circulation pipe (32) for selectively connecting the circulation pipe (32) and the reactor (2).

Images