Stirring reaction tank for producing coupling agent

Abstract

The utility model discloses a stirring reaction tank for producing a coupling agent, which comprises a tank body, supporting legs and a stirring motor, a stirring component is arranged in the tank body, the stirring component is connected with the stirring motor, a plurality of layers of circular ring coil pipes are arranged in the tank body, the plurality of layers of circular ring coil pipes are respectively communicated with a liquid inlet branch pipe and a liquid outlet branch pipe, the liquid inlet branch pipe is communicated with a liquid inlet main pipe, and the liquid outlet branch pipe is communicated with a liquid outlet main pipe. The liquid outlet branch pipe is communicated with the liquid outlet main pipe, the liquid inlet main pipe and the liquid outlet main pipe are communicated with an external heat exchange medium supply device, proportional valves are arranged on the liquid inlet branch pipe and the liquid outlet branch pipe, and a plurality of sets of electromagnetic coils are wound on the outer wall of the tank body and electrically connected to a high-frequency power source. Through the synergistic effect of the electromagnetic coil and the annular coil pipe, the temperature in the tank can be quickly responded; the temperature in the tank body is dynamically adjusted by adjusting the on-off of each group of electromagnetic coils and adjusting the heat medium flow of each layer of circular ring coil pipe through a proportional valve, so that the raw materials and the additive fully react in the tank, and the uniformity of molecular weight distribution of the coupling agent is effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of coupling agent production technology, specifically to a stirred reaction vessel for producing coupling agents. Background Technology

[0002] Coupling agents are organosilicon compounds with reactive groups that can combine with both inorganic and organic materials. They are widely used in the coatings, rubber, and pigment industries. The synthesis and production of coupling agents requires extremely high temperature control. Traditional stirred reactors often use a single heating method, such as jacketed heating. However, due to limitations in heat transfer area and thermal resistance, the heating rate is slow. Especially when handling high-viscosity materials like coupling agents, a stagnant layer easily forms on the wall, leading to a significant decrease in the heat transfer coefficient. This makes it difficult to achieve dynamic temperature gradient control during the reaction process, affecting the uniformity of the product's molecular weight distribution.

[0003] Chinese patent publication number CN219942821U discloses a constant-temperature synthesis apparatus for the production of silane coupling agents, including a reactor with a hollow jacket on its side wall. The reactor's outer side wall has an outlet at the upper end and an inlet at the lower end, with water flowing within the hollow jacket to heat the materials inside the reactor in a constant-temperature water bath. The outer side wall also houses a stirring device and temperature and pressure sensors for monitoring temperature and pressure. The top of the reactor has a feeding port and a pressure relief valve, with a cover on top of the feeding port. This patent heats the materials by using a hollow jacket on the side wall of the reactor to allow water to flow within it. However, this patent also suffers from a slow heating rate and difficulty in achieving dynamic temperature control during the reaction process. Utility Model Content

[0004] The main objective of this invention is to overcome the deficiencies of the prior art and provide a stirred reaction vessel for producing coupling agents.

[0005] To achieve the above objectives, the present invention proposes a stirred reaction vessel, comprising a vessel body, supporting feet at the bottom of the vessel body, and a stirring motor at the top of the vessel body. The vessel body contains a stirring assembly connected to the output end of the stirring motor. The inner wall of the vessel body is provided with several layers of annular coils spaced apart. Each of the annular coils is connected to an inlet branch pipe and an outlet branch pipe. The inlet branch pipe connects to the main inlet pipe, and the outlet branch pipe connects to the main outlet pipe. Both the main inlet and outlet pipes are connected to an external heat exchange medium supply device. A proportional valve is installed on each of the inlet and outlet branch pipes. Several sets of electromagnetic coils are wound around the outer wall of the vessel body, and these electromagnetic coils are electrically connected to a high-frequency power supply. Through the electromagnetic heating of the electromagnetic coils and the synergistic effect of the annular coils, rapid temperature response and precise temperature control can be achieved within the reaction vessel. Starting the stirring motor drives the stirring assembly to rotate and stir, preventing material stagnation and accumulation in one place from affecting the heat transfer coefficient, ensuring that raw materials and additives react fully within the vessel, and effectively improving the uniformity of the molecular weight distribution of the coupling agent.

[0006] In a further optimized technical solution, an insulating layer is provided on the outer wall of the tank located between the two annular coils, and the electromagnetic coil is wound around the insulating layer. The insulating layer prevents leakage and arcing of the electromagnetic coil.

[0007] In a further optimized technical solution, the electromagnetic coil is wrapped with an aluminum foil layer. This aluminum foil layer reduces interference from the magnetic field to external devices.

[0008] In a further optimized technical solution, the aluminum foil layer is wrapped with an insulation layer, which completely covers the area where the annular coil and the electromagnetic coil are arranged. The insulation layer keeps the material inside the tank warm, preventing heat loss.

[0009] In a further optimized technical solution, the tank body is made of magnetically conductive stainless steel or carbon steel, and the annular coil is made of austenitic stainless steel. By using austenitic stainless steel for the annular coil, interference with the magnetic field of the electromagnetic coil is avoided.

[0010] In a further optimized technical solution, the stirring assembly includes a stirring shaft, anchor-frame blades, and several inclined straight blades. The top end of the stirring shaft is connected to the output end of the stirring motor, the anchor-frame blades are disposed at the bottom end of the stirring shaft, and the several inclined straight blades are spaced apart in the middle of the stirring shaft. By using anchor-frame blades in conjunction with inclined straight blades, the stirring and mixing efficiency is improved.

[0011] In a further optimized technical solution, the stirring assembly also includes a planetary gear train and a scraper rod. The planetary gear train is located at the top of the tank body, with its central gear fixed to the stirring shaft. The planet carriers of the planetary gear train are fixed to the tank body. The top end of the scraper rod is connected to the outer circumference of the large gear ring of the planetary gear train via a horizontal connecting rod. The scraper rod simultaneously abuts against the inner wall of the tank body and the outer wall of the annular coil. Through the transmission of the planetary gear train, the scraper rod rotates in the opposite direction to the stirring assembly, scraping and breaking the coupling agent adhesion layer on the inner wall of the tank body and the outer wall of the annular coil, thus avoiding affecting the heat transfer efficiency.

[0012] In a further optimized technical solution, the cross-section of the annular coil is rectangular, the outer circumferential surface of the annular coil is fixedly connected to the inner wall of the tank, and the scraper rod is provided with notches corresponding to the number of annular coils, which are inserted into the annular coils.

[0013] In a further optimized technical solution, a manhole is provided on the top of the tank, and a manhole cover is provided at the manhole. The manhole allows operators to easily enter the tank for maintenance.

[0014] In a further optimized technical solution, the top of the tank is connected to a raw material pipe and an additive pipe, and the bottom of the tank is connected to a discharge pipe.

[0015] The beneficial effects of this invention include: through the synergistic effect of electromagnetic heating by electromagnetic coils and circular coils, rapid response and precise temperature control are achieved within the reaction vessel. During the heating stage, the stirring motor is activated to drive the stirring components to rotate and stir, preventing material stagnation and accumulation in one place. At the same time, both electromagnetic coils and circular coils simultaneously heat the material inside the vessel, enabling rapid temperature rise within the vessel. During the heat preservation reaction stage, the temperature inside the vessel is dynamically adjusted by regulating the on / off state of each set of electromagnetic coils and by adjusting the flow rate of the heat medium in each layer of circular coils through proportional valves. This allows the raw materials and additives to fully react within the vessel, effectively improving the uniformity of the molecular weight distribution of the coupling agent. Attached Figure Description

[0016] Figure 1 This is an overall schematic diagram of the stirred reaction vessel in an embodiment of this utility model.

[0017] Figure 2 This is a schematic diagram of the circular coil arrangement in an embodiment of this utility model.

[0018] Figure 3 This is a schematic diagram of the stirring assembly in an embodiment of this utility model.

[0019] Figure 4 This is a schematic diagram of the interior of the tank after it has been cut open in an embodiment of this utility model.

[0020] Figure 5 yes Figure 4 A magnified view of a portion of point A in the middle.

[0021] Figure reference numerals: 1 Tank body; 101 Manhole; 102 Manhole cover; 103 Raw material pipe; 104 Additive pipe; 105 Discharge pipe; 2 Support foot; 3 Stirring motor; 4 Stirring assembly; 401 Stirring shaft; 402 Anchor frame blade; 403 Inclined straight blade; 404 Planetary gear train; 405 Scraper rod; 406 Horizontal connecting rod; 407 Notch; 5 Circular coil; 501 Inlet branch pipe; 502 Outlet branch pipe; 503 Inlet main pipe; 504 Outlet main pipe; 505 Proportional valve; 6 Electromagnetic coil; 601 Insulation layer; 602 Aluminum foil layer; 7 Thermal insulation layer. Detailed Implementation

[0022] To make the technical problems, technical solutions, and beneficial effects of the embodiments of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0023] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as "connected to" another component, it can be directly connected to or indirectly connected to that other component. Furthermore, a connection can be for both fixing and circuit connection purposes.

[0024] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0026] Please see Figures 1 to 5The present invention discloses a stirred reaction vessel for producing coupling agents, comprising a vessel body 1, support legs 2 disposed at the bottom of the vessel body 1, and a stirring motor 3 disposed at the top of the vessel body 1. Specifically, a manhole 101 is provided at the top of the vessel body 1, and a manhole cover 102 is provided at the manhole 101, allowing operators to easily enter the vessel for maintenance. A raw material pipe 103 and an additive pipe 104 are connected at the top of the vessel body 1. Raw materials (such as solid stearic acid) are fed into the vessel body 1 through the raw material pipe 103 using vacuum conveying, while additives (such as tetraisopropyl titanate) are pumped into the vessel body 1 through the additive pipe 104 to mix with the raw materials. The reaction process involves a discharge pipe 105 connected to the bottom of tank 1, through which the reacted material is discharged to the outside of the tank and transported to the next process. Inside tank 1 is a stirring assembly 4, connected to the output of a stirring motor 3. The stirring motor 3 drives the stirring assembly 4 to rotate and stir the material inside tank 1. Several layers of annular coils 5 are spaced apart on the inner wall of tank 1, horizontally arranged. Each annular coil 5 is connected to an inlet branch pipe 501 and an outlet branch pipe 502. The inlet branch pipe 501 connects to the main inlet pipe 503, and the outlet branch pipe 502 connects to the main outlet pipe 503. On the 04, the inlet pipe 503 and outlet pipe 504 are vertically installed outside the tank body 1. The inlet pipe 503 and outlet pipe 504 are connected to an external heat exchange medium supply device (not shown). Specifically, the external heat exchange medium supply device injects heat exchange medium into each annular coil 5 through the inlet pipe 503 and inlet branch pipe 501. The heat exchange medium exchanges heat with the material inside the tank body 1. After heat exchange, it returns to the external heat exchange medium supply device through the outlet branch pipe 502 and outlet pipe 504 for circulation. For example, when it is necessary to heat the material inside the tank body 1, the external heat exchange medium supply device can use... The oil temperature controller uses heat transfer oil as the heat exchange medium. When cooling of the material inside the tank 1 is required, an external heat exchange medium supply device can be an ice water machine or a cooling tower, with cooling water as the heat exchange medium. Proportional valves 505 are installed on the inlet branch pipe 501 and the outlet branch pipe 502, respectively. The flow rate of the heat exchange medium entering the annular coil 5 is adjusted by the proportional valves 505 to regulate and control the heat exchange temperature. At the same time, by controlling the opening of each proportional valve 505, the flow rate of the heat exchange medium in each layer of the annular coil 5 can be controlled, thereby adjusting the heat exchange temperature and realizing the vertical temperature gradient control inside the tank 1. This is suitable for staged control of the reaction temperature when producing coupling agents.Several sets of electromagnetic coils 6 are wound around the outer wall of the tank 1. Each set of electromagnetic coils 6 is electrically connected to a high-frequency power supply (not shown in the figure). Specifically, an insulating layer 601 is provided on the outer wall of the tank 1 located between two layers of annular coils 5. The insulating layer 601 avoids the area of ​​the annular coils 5. The electromagnetic coils 6 are wound on the insulating layer 601. The insulating layer 601 can be a ceramic coating or a mica paper layer wrapped around the outer wall of the tank 1. The insulating layer 601 prevents leakage and arc discharge of the electromagnetic coils 6. Each set of electromagnetic coils 6 is controlled by an independent power switch. Multiple thermocouples (not shown in the figure) are set inside the tank 1 to monitor the temperature. If there is local overheating, a cooling medium can be circulated into the annular coils 5 to compensate. If there is local undercooling, the electromagnetic coils 6 are used for electromagnetic heating to increase the temperature in a directional manner. The entire temperature control is regulated by PID control. In this embodiment, the electromagnetic heating of the electromagnetic coil 6 and the synergistic effect of the annular coil 5 enable rapid response and precise temperature control within the reaction vessel. In the initial stage of coupling agent production, after adding raw materials and additives to the vessel 1, the stirring motor 3 is activated to drive the stirring assembly 4 to rotate and stir. Simultaneously, the electromagnetic coil 6 and the annular coil 5 heat the vessel 1 synchronously, achieving rapid temperature rise. Once the set temperature is reached, the on / off state of each set of electromagnetic coils 6 is adjusted, and the flow rate of the heat medium in each layer of the annular coil 5 is adjusted via the proportional valve 505, dynamically adjusting the temperature within the vessel 1. This ensures that the raw materials and additives react fully within the vessel. Furthermore, the stirring action of the stirring assembly 4 prevents material stagnation and accumulation in one place, thus avoiding a negative impact on the heat transfer coefficient and ensuring a thorough reaction of the raw materials and additives within the vessel. This effectively improves the uniformity of the coupling agent's molecular weight distribution.

[0027] In a specific example, an aluminum foil layer 602 is wrapped around the outside of the electromagnetic coil 6. The aluminum foil layer 602 serves as electromagnetic shielding to reduce the interference of the magnetic field on external devices. Of course, the aluminum foil layer 602 can also be replaced with galvanized steel plate.

[0028] In a specific example, an insulation layer 7 is wrapped around the outside of the aluminum foil layer 602, covering the entire area where the annular coil 5 and the electromagnetic coil 6 are arranged. The insulation layer 7 is made of insulation cotton material, which insulates the material inside the tank 1, prevents heat loss, and saves energy.

[0029] In a specific example, the tank 1 is made of magnetic stainless steel or carbon steel, such as 430 stainless steel, and the annular coil 5 is made of austenitic stainless steel, such as 316 or 304 stainless steel, which are non-magnetic stainless steels, to avoid the annular coil 5 affecting the heating of the electromagnetic coil 6.

[0030] In a preferred embodiment, the stirring assembly 4 includes a stirring shaft 401, an anchor-frame blade 402, and several inclined straight blades 403. The top end of the stirring shaft 401 is connected to the output end of the stirring motor 3. The anchor-frame blade 402 is disposed at the bottom end of the stirring shaft 401, and several inclined straight blades 403 are spaced apart in the middle of the stirring shaft 401. The inclined straight blades 403 are straight blades tilted at a certain angle. In this embodiment, the anchor-frame blade 402 pushes the material to move circumferentially, forming a large-scale main circulation. Then, the inclined straight blades 403 break the circumferential dominant flow pattern of the anchor-frame blade 402, enhance the material exchange between the center and the edge, eliminate the "dead zone", realize the full tank flow field coverage, and improve the mixing efficiency, heat transfer performance and process adaptability.

[0031] In a preferred embodiment, the stirring assembly 4 further includes a planetary gear train 404 and a scraper rod 405. The planetary gear train 404 is disposed at the top inside the tank 1, with the central gear of the planetary gear train 404 fixedly mounted on the stirring shaft 401. The planet carrier of the planetary gear train 404 is fixed to the inner top wall of the tank 1. The top end of the scraper rod 405 is connected to the outer periphery of the large gear ring of the planetary gear train 404 via a horizontal connecting rod 406. The scraper rod 405 simultaneously abuts against the inner wall of the tank 1 and the outer wall of the annular coil 5. Specifically, the annular coil 5 has a rectangular cross-section, and its outer circumferential surface is fixedly connected to the inner wall of the tank 1. The scraper rod 405 has notches 407 corresponding to the number of annular coils 5. The notches 407 are inserted into the annular coils 5, such that the inner sides of the notches 407 abut against the upper and lower sides of the annular coil 5, and the inner bottom surface of the notches 407 abuts against the inner circumferential surface of the annular coil 5. While the stirring motor 3 drives the stirring shaft 401 of the stirring assembly 4 to rotate and stir, the planetary gear system 404 drives the scraper 405 to reverse (the central gear is the driving component, the planetary carrier is fixed, the large gear ring is the driven component, and the planetary gear system 404 is a speed-reducing transmission with opposite directions). This causes the scraper 405 to move in the opposite direction to the anchor frame blade 402 and the inclined straight blade 403, forming a relative velocity superposition with the tank wall, which improves the scraping efficiency of the coupling agent material. At the same time, it continuously scrapes in the opposite direction to destroy the adhesion layer of the coupling agent on the wall surface, avoiding local overheating or a decrease in heat transfer efficiency.

[0032] The above description, in conjunction with specific / preferred embodiments, provides a further detailed explanation of the present invention and should not be construed as limiting the specific implementation of the present invention to these descriptions. For those skilled in the art, various substitutions or modifications can be made to these described embodiments without departing from the concept of the present invention, and all such substitutions or modifications should be considered within the protection scope of the present invention. In the description of this specification, the reference to terms such as "an embodiment," "some embodiments," "preferred embodiment," "example," "specific example," or "some examples," etc., indicates that the specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the described specific features, structures, materials, or characteristics can be combined in a suitable manner in any one or more embodiments or examples. Without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification and the features of different embodiments or examples. Although embodiments of the present invention and their advantages have been described in detail, it should be understood that various changes, substitutions and alterations may be made herein without departing from the scope of protection of the patent application.

Claims

1. A stirred reaction tank for producing a coupling agent, characterized by: The device includes a tank body, support feet at the bottom of the tank body, and a stirring motor at the top of the tank body. An stirring assembly is located inside the tank body and is connected to the output of the stirring motor. Several layers of annular coils are spaced apart on the inner wall of the tank body. Inlet and outlet branch pipes are connected to the layers of annular coils, respectively. The inlet branch pipes are connected to the main inlet pipe, and the outlet branch pipes are connected to the main outlet pipe. The main inlet and outlet pipes are connected to an external heat exchange medium supply device. Proportional valves are installed on the inlet and outlet branch pipes. Several sets of electromagnetic coils are wound around the outer wall of the tank body, and these electromagnetic coils are electrically connected to a high-frequency power supply.

2. The stirred reaction vessel of claim 1 wherein: An insulating layer is provided on the outer wall of the tank located between the two annular coils, and the electromagnetic coil is wound on the insulating layer.

3. The stirred reaction vessel of claim 2 wherein: The electromagnetic coil is wrapped with an aluminum foil layer.

4. The stirred reaction vessel of claim 3 wherein: The aluminum foil layer is wrapped with an insulation layer, which covers the area where the annular coil and the electromagnetic coil are arranged.

5. The stirred reaction vessel of claim 4 wherein: The tank body is made of magnetic stainless steel or carbon steel, and the annular coil is made of austenitic stainless steel.

6. The stirred tank reactor according to any one of claims 1 to 5, wherein: The stirring assembly includes a stirring shaft, an anchor-frame blade, and several inclined straight blades. The top end of the stirring shaft is connected to the output end of the stirring motor. The anchor-frame blade is located at the bottom end of the stirring shaft, and the several inclined straight blades are arranged at intervals in the middle of the stirring shaft.

7. The stirred reaction vessel of claim 6 wherein: The stirring assembly also includes a planetary gear train and a scraper rod. The planetary gear train is located at the top of the tank body. The central gear of the planetary gear train is fixed on the stirring shaft. The planet carrier of the planetary gear train is fixed on the tank body. The top end of the scraper rod is connected to the outer periphery of the large gear ring of the planetary gear train through a horizontal connecting rod. The scraper rod abuts against both the inner wall of the tank body and the outer wall of the annular coil.

8. The stirred reaction vessel of claim 7 wherein: The annular coil has a rectangular cross-section. The outer circumferential surface of the annular coil is fixedly connected to the inner wall of the tank. The scraper rod has notches corresponding to the number of annular coils, and the notches are inserted into the annular coils.

9. The stirred reaction vessel of claim 8 wherein: A manhole is provided on the top of the tank, and a manhole cover is provided at the manhole.

10. The stirred reaction vessel of claim 9 wherein: The top of the tank is connected to a raw material pipe and an additive pipe, and the bottom of the tank is connected to a discharge pipe.

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