Polyurethane production prepolymerization reaction kettle
By combining the lid lifting assembly and the water circulation heating stirrer, the problems of inconvenient lid operation, unstable temperature, and poor stirring effect in the existing polyurethane production prepolymer reactors have been solved, thus achieving stable and efficient polyurethane production.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-04
- Publication Date
- 2026-04-03
AI Technical Summary
Existing polyurethane prepolymer reactors cannot provide complete production conditions during the reaction process. The reactor lid is inconvenient to operate, the temperature control is unstable, and the stirring effect is poor, which affects the production efficiency of polyurethane.
The reactor lid is raised and lowered by a lid lifting assembly. Combined with water circulation heating and a stirrer, the raw materials inside the reactor are stably heated and stirred through a heating jacket and hot water circulation. The lid lifting assembly, together with the stirrer, promotes the reaction of the raw materials.
It enables convenient operation of the kettle lid, stable temperature control, and full reaction of raw materials, thereby improving the efficiency and quality of polyurethane production.
Smart Images
Figure CN224071948U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of polyurethane production equipment, specifically to a polyurethane production prepolymer reactor. Background Technology
[0002] Polyurethane production involves the polymerization reaction of various raw materials. The prepolymerization reaction of polyurethane raw materials requires a reaction vessel. The reaction inside the reaction vessel requires stirring and heating, and other raw materials need to be added during the reaction process. Existing technology cannot provide all the complete production conditions. Utility Model Content
[0003] The technical problem to be solved by this utility model is to overcome the existing defects and provide a prepolymer reactor for polyurethane production. The reactor lid is raised and lowered by a lid lifting assembly, making it easy to open and close. The raw materials inside the reactor are heated by a heating jacket combined with hot water circulation, resulting in stable heating temperature. The raw materials inside the reactor are stirred by a stirrer, which facilitates the full reaction of various raw materials. This provides a variety of complete production conditions for polyurethane production and can effectively solve the problems in the background technology.
[0004] To achieve the above objectives, this utility model provides the following technical solution: a polyurethane production prepolymer reactor, including a control cabinet, and further comprising:
[0005] The vessel lid control mechanism includes a vessel lid lifting assembly, a power box, a connecting cylinder, and a vessel lid. The top of the control cabinet is connected to the bottom left end of the power box via the vessel lid lifting assembly, and the bottom right end of the power box is connected to the top of the vessel lid via a vertical connecting cylinder.
[0006] The reactor mechanism includes a reactor body, a heating jacket, a discharge pipe, and a discharge solenoid valve. The reactor body is installed on the right side of the control cabinet below the reactor cover. The side wall of the reactor body is provided with a heating jacket. The top of the discharge pipe is fixedly connected to the bottom center of the reactor body, and the discharge solenoid valve is installed in the middle of the discharge pipe.
[0007] A stirrer is installed in the middle of the lid;
[0008] The water circulation heating mechanism is installed at the bottom of the reactor body and is connected to the heating jacket.
[0009] The lid lifting assembly is used to drive the power box, connecting cylinder, and lid to move up and down. The lid moves up to open the reactor body, and moves down to close the reactor body. The water circulation heating mechanism, together with the heating jacket, can heat the reactor body and the raw materials inside, promoting the reaction of various raw materials. Since the water circulation heating mechanism uses water as the heating medium, the heating temperature is stable, which is conducive to the full reaction of various raw materials. When the lid is closed at the top of the reactor body, the stirrer stirs the raw materials inside the reactor body, promoting the reaction process of various raw materials and ensuring the smooth production of polyurethane.
[0010] Furthermore, the reactor mechanism also includes bent brackets and mounting blocks. Two bent brackets are installed at the front and rear ends of the right side of the control cabinet, and two mounting blocks are installed on each of the two bent brackets. The two mounting blocks are fixedly connected to the front and rear sides of the reactor body by screws. The bent brackets are used to support the reactor body, allowing the bottom of the reactor body to be off the ground. The mounting blocks are used to install and fix the reactor body on the bent brackets. The mounting blocks and screws facilitate quick assembly and disassembly of the reactor body.
[0011] Furthermore, the vessel lid lifting assembly includes sliding sleeves, sliding columns, a synchronous plate, a lifting cylinder, and a fixed flange. Two sliding sleeves are installed on the top of the control cabinet, and two sliding columns are vertically slidably connected within each sleeve. The bottoms of the two sliding columns are fixedly connected to both ends of the synchronous plate, and the middle of the synchronous plate is fixedly connected to the top of the lifting cylinder. The bottom of the lifting cylinder is installed at the bottom of the control cabinet, and the tops of the two sliding columns are connected to the bottom left end of the power box via two fixed flanges. The cooperation of the sliding sleeves and sliding columns facilitates the stable up-and-down movement of the power box. When the lifting cylinder extends, it pushes the power box up through the synchronous plate, sliding columns, and fixed flange, thereby lifting the vessel lid. When the lifting cylinder shortens, it lowers the power box through the synchronous plate, sliding columns, and fixed flange, thereby lowering the vessel lid.
[0012] Furthermore, the agitator includes a stirring shaft, stirring blades, and a stirring motor. A vertical stirring shaft is rotatably mounted in the center of the vessel lid. The top end of the stirring shaft passes through a connecting cylinder and is fixedly connected to the output shaft of the stirring motor. The stirring motor is installed inside a power box. The stirring shaft section located below the vessel lid has stirring blades arranged vertically at equal intervals. After the vessel lid is placed on top of the reactor body, the stirring motor operates, driving the stirring shaft to rotate. The stirring shaft, through the stirring blades, can fully stir the various raw materials inside the reactor body.
[0013] Furthermore, the water circulation heating mechanism includes a water heater, an outlet pipe, an inlet pipe, a high-temperature resistant water pump, a transfer pipe one, a transfer pipe two, and a temperature control probe. Two water heaters are respectively installed on the front and rear sides of the bottom of the reactor body. The top openings of the two water heaters are respectively connected to the front and rear sides of the bottom of the heating jacket. The bottom of one water heater is connected to the outlet pipe, and the bottom of the other water heater is connected to the inlet pipe. A high-temperature resistant water pump is installed on the right side of the control cabinet. The outlet of the high-temperature resistant water pump is connected to the inlet pipe through transfer pipe two, and the inlet of the high-temperature resistant water pump is connected to the outlet pipe through transfer pipe one. A temperature control probe is inserted into the bottom of the reactor body. During use, the heating jacket is filled with pure water. Two water heaters and a high-temperature water pump operate. The water heaters, together with transfer pipe one, transfer pipe two, and the two water heaters, circulate the water on the front and back sides of the heating jacket. The water is heated as it flows through the water heaters. The raw materials in the reactor are heated by using water as a medium. A temperature control probe is installed to know the temperature of the raw materials in the reactor in a timely manner, which helps to maintain the stability of the raw material temperature and promote the occurrence of the prepolymerization reaction.
[0014] Furthermore, it also includes a feeding assembly, which comprises a feeding hopper, a feeding pipe, and a feeding solenoid valve. The top of the reactor lid is connected to the bottom of the feeding hopper via the feeding pipe. The feeding hopper is installed on the front side of the power box, and the feeding solenoid valve is installed in the middle of the feeding pipe. Raw materials that need to be added during the process are added to the feeding hopper. When addition is needed, the feeding solenoid valve is opened, and the raw materials in the feeding hopper are added to the reactor body through the feeding pipe. At this time, the stirrer operates to mix them evenly.
[0015] Furthermore, it also includes a product addition component, which comprises an addition tube and a product addition port. The product addition port is connected to the top of the reactor lid via the addition tube. The product base material to be reacted can be added into the reactor body through the addition tube and the product addition port. For sealing, a removable sealing cap needs to be installed on the product addition port. The sealing cap can also be a transparent cap, allowing for easy observation of the reaction process inside the reactor.
[0016] Compared with existing technologies, the advantages of this polyurethane prepolymer production reactor are:
[0017] 1. The lid lifting assembly is used to drive the power box, connecting cylinder, and lid to move up and down. The lid moves up to open the reactor body, and moves down to close the reactor body. The water circulation heating mechanism, together with the heating jacket, can heat the reactor body and the raw materials inside, promoting the reaction of various raw materials. Since the water circulation heating mechanism uses water as the heating medium, the heating temperature is stable, which is conducive to the full reaction of various raw materials. When the lid is closed at the top of the reactor body, the stirrer stirs the raw materials inside the reactor body, promoting the reaction process of various raw materials and ensuring the smooth production of polyurethane.
[0018] 2. The reactor lid is raised and lowered by the lid lifting assembly, making it easy to open and close. The heating method of heating jacket combined with hot water circulation is used to heat the raw materials in the reactor, resulting in a stable heating temperature. The raw materials in the reactor are stirred by a stirrer, which is conducive to the full reaction of various raw materials and can provide a variety of complete production conditions for polyurethane production. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the structure of this utility model;
[0020] Figure 2 This is a schematic diagram of the internal structure of the control cabinet of this utility model;
[0021] Figure 3 This is a schematic diagram of the rear structure of this utility model;
[0022] Figure 4 This utility model Figure 3 A magnified view of the structure at point A in the middle;
[0023] Figure 5 This is a schematic cross-sectional view of the reaction vessel body in this utility model;
[0024] In the diagram: 1 Control cabinet, 2 Reactor lid control mechanism, 21 Sliding sleeve, 22 Sliding column, 23 Power box, 24 Synchronization plate, 25 Lifting cylinder, 26 Fixed flange, 27 Connecting cylinder, 28 Reactor lid, 3 Control components, 31 Mounting base, 32 Support rod, 33 Control panel, 4 Feeding components, 41 Feeding hopper, 42 Feeding pipe, 43 Feeding solenoid valve, 5 Product adding components, 51 Adding pipe, 52 Product adding port, 6 Multifunctional piping components, 61 Piping. 62 Control solenoid valve, 63 External flange, 7 Agitator, 71 Agitator shaft, 72 Agitator blades, 73 Agitator motor, 8 Reactor mechanism, 81 Bend frame, 82 Mounting corner block, 83 Reactor body, 84 Heating jacket, 85 Discharge pipe, 86 Discharge solenoid valve, 9 Water circulation heating mechanism, 91 Water heater, 92 Water outlet pipe, 93 Water inlet pipe, 94 High temperature resistant water pump, 95 Transfer pipe one, 96 Transfer pipe two, 97 Temperature control probe, 10 Cabinet door. Detailed Implementation
[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0026] Example 1, please refer to Figures 1 to 5The present invention provides a technical solution: a polyurethane production prepolymer reactor, including a control cabinet 1, a cabinet door 10 installed on the front opening of the control cabinet 1, which can be opened and closed by means of the cabinet door 10, and also includes a reactor lid control mechanism 2, a reactor mechanism 8, a stirrer 7 and a water circulation heating mechanism 9.
[0027] The vessel lid control mechanism 2 includes a vessel lid lifting assembly, a power box 23, a connecting cylinder 27, and a vessel lid 28. The top of the control cabinet 1 is connected to the bottom left end of the power box 23 through the vessel lid lifting assembly, and the bottom right end of the power box 23 is connected to the top of the vessel lid 28 through the vertical connecting cylinder 27.
[0028] The vessel lid lifting assembly includes a sliding sleeve 21, a sliding column 22, a synchronous plate 24, a lifting cylinder 25, and a fixed flange 26. Two sliding sleeves 21 are installed on the top of the control cabinet 1. Two sliding columns 22 are vertically slidably connected inside each sliding sleeve 21. The bottoms of the two sliding columns 22 are fixedly connected to both ends of the synchronous plate 24. The middle of the synchronous plate 24 is fixedly connected to the top of the lifting cylinder 25. The bottom of the lifting cylinder 25 is installed at the bottom of the control cabinet 1. The tops of the two sliding columns 22 are connected to the bottom left end of the power box 23 via two fixed flanges 26. The sliding sleeves 21 and sliding columns 22 work together to facilitate the stable up-and-down movement of the power box 23. When the lifting cylinder 25 extends, it pushes the power box 23 up through the synchronous plate 24, sliding column 22, and fixed flange 26, thereby lifting the vessel lid 28. When the lifting cylinder 25 shortens, it lowers the power box 23 through the synchronous plate 24, sliding column 22, and fixed flange 26, thereby lowering the vessel lid 28.
[0029] The reactor mechanism 8 includes a reactor body 83, a heating jacket 84, a discharge pipe 85, and a discharge solenoid valve 86. The reactor body 83 is installed on the right side of the control cabinet 1 below the reactor cover 28. The side wall of the reactor body 83 is provided with a heating jacket 84. The bottom center of the reactor body 83 is fixedly connected to the top of the discharge pipe 85. The discharge solenoid valve 86 is installed in the middle of the discharge pipe 85.
[0030] The reactor mechanism 8 also includes a bending frame 81 and mounting blocks 82. Two bending frames 81 are installed at the front and rear ends of the right side of the control cabinet 1, and two mounting blocks 82 are installed on each of the two bending frames 81. The two mounting blocks 82 are fixedly connected to the front and rear sides of the reactor body 83 by screws. The bending frames 81 are used to support the reactor body 83, so that the bottom of the reactor body 83 is off the ground. The mounting blocks 82 are used to install and fix the reactor body 83 on the bending frames 81. The mounting blocks 82 and screws facilitate quick assembly and disassembly of the reactor body 83.
[0031] The stirrer 7 is installed in the middle of the lid 28;
[0032] The stirrer 7 includes a stirring shaft 71, stirring blades 72, and a stirring motor 73. A vertical stirring shaft 71 is rotatably mounted in the center of the vessel cover 28. The top end of the stirring shaft 71 passes through the connecting cylinder 27 and is fixedly connected to the output shaft of the stirring motor 73. The stirring motor 73 is installed inside the power box 23. Stirring blades 72 are vertically and equidistantly arranged on the shaft section of the stirring shaft 71 located below the vessel cover 28. After the vessel cover 28 is placed on top of the reactor body 83, the stirring motor 73 operates, driving the stirring shaft 71 to rotate. The stirring shaft 71, through the stirring blades 72, can thoroughly stir various raw materials within the reactor body 83.
[0033] The water circulation heating mechanism 9 is installed at the bottom of the reactor body 83 and is connected to the heating jacket 84.
[0034] The water circulation heating mechanism 9 includes a water heater 91, an outlet pipe 92, an inlet pipe 93, a high-temperature resistant water pump 94, a transfer pipe 1 95, a transfer pipe 2 96, and a temperature control probe 97. Two water heaters 91 are respectively installed on the front and rear sides of the bottom of the reactor body 83. The top openings of the two water heaters 91 are connected to the front and rear sides of the bottom of the heating jacket 84, respectively. The bottom of one water heater 91 is connected to the outlet pipe 92, and the bottom of the other water heater 91 is connected to the inlet pipe 93. A high-temperature resistant water pump 94 is installed on the right side of the control cabinet 1. The outlet of the high-temperature resistant water pump 94 is connected to the inlet pipe 93 through the transfer pipe 2 96, and the inlet of the high-temperature resistant water pump 94 is connected to the outlet pipe 92 through the transfer pipe 1 95. A temperature control probe 97 is inserted into the bottom of the reactor body 83.
[0035] The water heater 91 can be made using existing technology or can be composed of an insulated cavity and a heating rod. When water passes through the insulated cavity of the water heater 91, it is heated by the heating rod.
[0036] During use, the heating jacket 84 is filled with pure water. Two water heaters 91 and a high-temperature water pump 94 are in operation. The water heaters 91, together with transfer pipe one 95, transfer pipe two 96 and the two water heaters 91, circulate the water in the front and back sides of the heating jacket 84. The water is heated when it flows through the water heaters 91. The raw materials in the reactor body 83 are heated by water as a medium. A temperature control probe 97 is set up to know the temperature of the raw materials in the reactor body 83 in a timely manner, which helps to maintain the stability of the raw material temperature and promote the occurrence of the prepolymerization reaction.
[0037] It also includes a control component 3, which includes a mounting base 31, a support rod 32, and a control panel 33. The support rod 32 is mounted on the top front side of the control cabinet 1 via the mounting base 31, and the control panel 33 is mounted on the top of the support rod 32.
[0038] In use, the lid lifting assembly drives the power box 23, connecting cylinder 27, and lid 28 to move up and down. Lid 28 moves up to open reactor body 83, and lid 28 moves down to close reactor body 83. Water circulation heating mechanism 9, in conjunction with heating jacket 84, can heat reactor body 83 and the raw materials inside, promoting the reaction of various raw materials. Since water circulation heating mechanism 9 uses water as the heating medium, the heating temperature is stable, which is conducive to the full reaction of various raw materials. When lid 28 closes the top of reactor body 83, stirrer 7 stirs the raw materials inside reactor body 83, promoting the reaction process of various raw materials and ensuring the smooth production of polyurethane.
[0039] Example 2, please refer to Figures 1 to 5 This utility model provides a technical solution: a prepolymer reactor for polyurethane production. This embodiment is structurally similar to Embodiment 1, with the difference being:
[0040] It also includes a feeding assembly 4, which comprises a feeding hopper 41, a feeding pipe 42, and a feeding solenoid valve 43. The top of the vessel lid 28 is connected to the bottom of the feeding hopper 41 via the feeding pipe 42. The feeding hopper 41 is installed on the front side of the power box 23, and the feeding solenoid valve 43 is installed in the middle of the feeding pipe 42. Raw materials that need to be added during the process are added to the feeding hopper 41. When it is necessary to add, the feeding solenoid valve 43 is opened, and the raw materials in the feeding hopper 41 can be added into the reactor body 83 through the feeding pipe 42. At this time, the stirrer 7 works to stir them evenly.
[0041] Example 3, please refer to Figures 1 to 5 This utility model provides a technical solution: a prepolymer reactor for polyurethane production. This embodiment is structurally similar to Embodiment Two, with the difference being:
[0042] It also includes a product addition component 5, which comprises an addition tube 51 and a product addition port 52. The top of the vessel lid 28 is connected to the product addition port 52 via the addition tube 51. The product base material to be reacted can be added into the reactor body 83 through the addition tube 51 and the product addition port 52. For sealing, a removable sealing cap needs to be installed on the product addition port 52. The sealing cap can also be a transparent cap, which allows for easy observation of the reaction inside the reactor body 83.
[0043] In other embodiments, please refer to Figures 1 to 5It also includes a multi-functional pipeline assembly 6, which includes a pipeline 61, a control solenoid valve 62, and an external flange 63. Two pipelines 61 are fixedly connected to the top of the reactor cover 28. External flanges 63 are installed on the top of the two pipelines 61 respectively. The external flanges 63 are used to connect to external raw material hoppers or pipelines. Control solenoid valves 62 are installed on the two pipelines 61 respectively. Gas can be discharged to the outside through the pipelines 61, or external raw material liquid can be added into the reactor body 83. The control solenoid valves 62 are used to control the opening and closing of the pipelines 61.
[0044] It is worth noting that the control panel 33 in the above embodiments is equipped with a PLC controller. The control panel 33 controls the operation of the lifting cylinder 25, the discharge solenoid valve 86, the stirring motor 73, the water heater 91, the high-temperature water pump 94, the feeding solenoid valve 43, and the control solenoid valve 62. The control method adopts the method commonly used in the prior art. The input terminal of the control panel 33 is electrically connected to the output terminal of the temperature control probe 97. The connection method adopts the prior art.
[0045] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, 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 process, method, article, or apparatus.
[0046] Although embodiments of the present 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 present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. Polyurethane production prepolymerization reactor, comprising a control cabinet (1), characterized in that, Also include: The kettle cover control mechanism (2) contains kettle cover lifting assembly, power box (23), connecting barrel (27) and kettle cover (28), the top of the control cabinet (1) is connected with the left end bottom of the power box (23) through the kettle cover lifting assembly, the right end bottom of the power box (23) is connected with the top of the kettle cover (28) through the vertical connecting barrel (27); The kettle body (83) of the kettle mechanism (8) is installed on the right side of the control cabinet (1) below the kettle cover (28), the side wall of the kettle body (83) is provided with the heating sandwich (84), the top end of the discharge pipe (85) is fixedly connected with the bottom center of the kettle body (83), and the discharge electromagnetic valve (86) is installed in the middle of the discharge pipe (85); The stirrer (7) is installed in the middle of the kettle cover (28); The water circulation heating mechanism (9) is installed at the bottom of the kettle body (83), and the water circulation heating mechanism (9) is connected with the heating sandwich (84).
2. The polyurethane production prepoly reaction kettle according to claim 1, characterized in that: The kettle mechanism (8) further comprises a bent bracket (81) and an installation corner block (82), two bent brackets (81) are respectively installed on the front and rear ends of the right side of the control cabinet (1), two installation corner blocks (82) are respectively installed on the two bent brackets (81), and the front and rear sides of the kettle body (83) are respectively fixedly connected with the two installation corner blocks (82) through screws.
3. The polyurethane production prepoly reaction kettle according to claim 1, characterized in that: The kettle cover lifting assembly comprises a sliding sleeve (21), a sliding column (22), a synchronous plate (24), a lifting cylinder (25) and a fixed flange (26), two sliding sleeves (21) are installed on the top of the control cabinet (1), two sliding columns (22) are respectively vertically and slidably connected in the two sliding sleeves (21), the bottoms of the two sliding columns (22) are fixedly connected with the two ends of the synchronous plate (24), the middle of the synchronous plate (24) is fixedly connected with the top end of the lifting cylinder (25), the bottom end of the lifting cylinder (25) is installed on the bottom of the control cabinet (1), and the top portions of the two sliding columns (22) are respectively connected with the left end bottom of the power box (23) through two fixed flanges (26).
4. The polyurethane production prepoly reaction kettle according to claim 1, characterized in that: The stirrer (7) comprises a stirring shaft (71), stirring blades (72) and a stirring motor (73), a vertical stirring shaft (71) is rotatably installed in the middle of the kettle cover (28), the top end of the stirring shaft (71) penetrates through the connecting barrel (27) and is fixedly connected with the output shaft of the stirring motor (73), the stirring motor (73) is installed in the power box (23), and the shaft section of the stirring shaft (71) below the kettle cover (28) is vertically and equally provided with the stirring blades (72).
5. The polyurethane production prepoly reaction kettle according to claim 1, characterized in that: The water circulation heating mechanism (9) comprises a water heater (91), a water outlet pipe (92), a water inlet pipe (93), a high-temperature-resistant water pump (94), a transfer pipe I (95), a transfer pipe II (96) and a temperature control probe (97), two water heaters (91) are arranged on the front and rear sides of the bottom of the reaction kettle body (83), the top openings of the two water heaters (91) are respectively communicated with the bottom of the front and rear sides of the heating sandwich (84), the bottom of one of the water heaters (91) is connected with the water outlet pipe (92), the bottom of the other water heater (91) is connected with the water inlet pipe (93), the right side of the control cabinet (1) is provided with the high-temperature-resistant water pump (94), the water outlet of the high-temperature-resistant water pump (94) is connected with the water inlet pipe (93) through the transfer pipe II (96), the water inlet of the high-temperature-resistant water pump (94) is connected with the water outlet pipe (92) through the transfer pipe I (95), and the temperature control probe (97) is arranged on the bottom of the reaction kettle body (83).
6. The polyurethane production prepoly reaction kettle according to claim 1, characterized in that: It also comprises a feeding assembly (4), the feeding assembly (4) comprises a feeding hopper (41), a feeding pipeline (42) and a feeding electromagnetic valve (43), the bottom end of the feeding hopper (41) is connected with the top of the kettle cover (28) through the feeding pipeline (42), the feeding hopper (41) is installed on the front side of the power box (23), and the feeding electromagnetic valve (43) is installed in the middle of the feeding pipeline (42).
7. The polyurethane production prepoly reaction kettle according to claim 1, characterized in that: It also comprises a product adding assembly (5), the product adding assembly (5) comprises an adding pipe (51) and a product adding port (52), and the top of the kettle cover (28) is connected with the product adding port (52) through the adding pipe (51).