Chemical reaction device with uniform heating structure
Patent Information
- Application Number
- CN202522429387.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-17
- Publication Date
- 2026-10-09
- Estimated Expiration
- 2035-11-17
AI Technical Summary
部分反应装置虽在釜内设置搅拌机构以改善传热，但由于搅拌与加热系统相互独立，搅拌过程难以兼顾热量传递，热量仍集中在外部区域，导致加热不均问题未得到根本解决
通过上述结构设计，本实用新型能够有效解决现有化工反应装置中外部加热单一、内部温度不均的问题。加热盒与加热罩形成外部环形加热系统，内部搅拌机构内设置的传动管形成内循环加热通道，当热水在系统内循环流动时，可从反应釜外壁和中心轴同时进行加热，使物料从外至内同步升温，显著提升加热均匀性。该内外双向协同加热方式能够有效消除物料中心温度滞后现象，防止反应物局部过热或未反应完全，从而保证化学反应过程的稳定性和产品质量一致性。
Smart Images
Figure CN224822606U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of chemical equipment technology, specifically relating to a chemical reaction device with a uniform heating structure. Background Technology
[0002] In the fields of chemical engineering, pharmaceuticals, coatings, and new material preparation, reaction vessels serve as crucial reaction containers, widely used for material mixing, reaction, heating, and temperature control. Existing chemical reaction equipment often employs electric heating mantles or jacketed circulating heating methods, heating the outer wall of the reaction vessel to heat the internal materials. However, since heating primarily originates from the outside of the reaction vessel, heat must be conducted inward through the vessel wall. The heat transfer efficiency is affected by the vessel wall thickness, thermal conductivity, and material viscosity, easily leading to uneven temperature distribution within the vessel in practical applications. Especially with high-viscosity materials or in large-volume reaction conditions, a significant temperature difference between the central and peripheral regions can result in incomplete local reactions or overheating and decomposition, affecting product quality and reaction stability.
[0003] Furthermore, existing heating systems generally employ a unidirectional circulating heat transfer medium, resulting in a short flow path and limited heat exchange area, leading to low thermal energy utilization. To increase heating speed, higher heating power is typically required, but this increases energy consumption and exacerbates localized thermal shock in the equipment. While some reaction devices incorporate stirring mechanisms within the vessel to improve heat transfer, the stirring and heating systems are independent, making it difficult to simultaneously manage heat transfer during stirring. Heat remains concentrated in the external area, thus the problem of uneven heating remains unresolved. Utility Model Content
[0004] In view of the problems existing in the prior art, the purpose of this utility model is to provide a chemical reaction device with a uniform heating structure, which can realize internal and external synergistic heating and also has a uniform stirring function, so as to improve the uniformity of the reaction and the heat utilization efficiency.
[0005] To achieve the above objectives, this utility model provides the following technical solution: A chemical reaction apparatus with a uniform heating structure includes a reaction vessel, a lid fixed at the upper port of the reaction vessel, a stirring mechanism provided inside the reaction vessel, a water collection box fixed at the center of the lid, and a stirring motor covering the outside of the water collection box fixed on the upper side of the lid. A heating box for heating water is fixed at the lower end of the reactor, and a heating cover is fitted on the outside of the reactor. A water pump is installed on the lower side of the reactor. The water inlet of the water pump is connected to the heating box through a pipe, and the water outlet of the water pump is connected to the heating cover through a pipe. The heating cover uses the hot water delivered by the water pump to heat the outside of the reactor. The upper end of the heating cover is connected to the water collection box through a water supply pipe. The upper end of the stirring mechanism passes through the water collection box and is connected to the stirring motor. A water flow channel is provided on the inner side of the stirring mechanism, and the upper and lower ends of the stirring mechanism are respectively connected and cooperate with the water collection box and the heating box.
[0006] Furthermore, the upper and lower ends of the heating cover are provided with sleeve openings that fit over the outside of the reactor, and the inner wall of the heating cover is fixed with a spiral blade. A water inlet is provided on the outer side of the heating cover near the upper end. The inner edge of the spiral blade is tightly attached to the outer surface of the reactor. The sleeve opening is tightly fitted onto the outer surface of the reactor and sealed by welding.
[0007] Furthermore, the stirring mechanism includes a transmission pipe, the upper end of which is closed, and several water inlets are provided near the upper end of the transmission pipe. The lower end of the transmission pipe passes through the bottom of the reactor and is connected to the heating box. A bearing for rotating the transmission pipe is fixed at the bottom of the reactor.
[0008] Furthermore, several evenly distributed stirring rods are fixed on the outside of the transmission tube, and stirring blades are fixed near the lower end of the transmission tube. Both the transmission tube and the stirring rods are made of stainless steel.
[0009] Furthermore, the upper port edge of the heating box is fixed with an installation edge, which is fixed to the lower end of the reactor by screws. A fixing seat is fixed to the lower side of the heating box, and several electric heating rods extending into the heating box are fixed to the upper side of the fixing seat.
[0010] Furthermore, a water collection chamber is provided in the center of the water collection box, and through holes are provided at both the upper and lower ends of the water collection box. A sealing ring is fixed inside the through hole to allow the transmission pipe to pass through and seal.
[0011] Furthermore, the lower end of the stirring motor is fixed with a support base that covers the outside of the water collection box. The lower end of the support base is fixed to the tank cover with screws, and the side of the support base has a clearance opening.
[0012] Compared with the prior art, the beneficial effects of this utility model are: Through the above structural design, this invention effectively solves the problems of single external heating and uneven internal temperature in existing chemical reaction equipment. The heating box and heating hood form an external annular heating system, while the transmission pipe inside the internal stirring mechanism forms an internal circulating heating channel. When hot water circulates within the system, it can simultaneously heat from the outer wall of the reactor and the central shaft, causing the materials to heat up synchronously from the outside to the inside, significantly improving heating uniformity. This bidirectional synergistic heating method effectively eliminates the phenomenon of temperature lag at the center of the material, preventing local overheating or incomplete reaction of reactants, thereby ensuring the stability of the chemical reaction process and the consistency of product quality.
[0013] By incorporating a heating shroud structure with spiral blades, a spiral flow channel is created outside the reactor, allowing the hot water to fully contact the outer wall of the vessel as it flows along the spiral path. This extends the heat exchange path and improves heat transfer efficiency. The spiral channel design overcomes the problems of short heat flux and numerous stagnant zones in traditional jacketed heating systems, resulting in a more uniform distribution of heat energy across the entire outer wall area. The hot water forms a continuous temperature gradient during its flow, reducing energy waste caused by excessively high local temperatures and significantly improving the thermal energy utilization rate of the heating system.
[0014] The internal hollow transmission tube structure of the stirring mechanism works in conjunction with the external stirring rod and blades, allowing hot water to circulate within the transmission tube while the stirring rod drives the material to tumble in three dimensions. This structure enhances the contact area between the material and the heat flow, and also improves the convection effect of the fluid within the reactor, achieving simultaneous operation of mechanical stirring and thermal convection. Heat can be evenly transferred to the central area of the reactor, significantly improving the problem of slow temperature rise in the central area in traditional devices, thereby accelerating the reaction rate and reducing energy consumption.
[0015] The circulation design between the water collection box and the heating box allows hot water to flow continuously in a closed loop, avoiding heat loss caused by poor water flow and incomplete circulation in traditional heating systems. Through stable flow control by the water pump, the heat medium in the entire system maintains stable circulation at high temperatures, thus maintaining a stable heating effect under long-term operating conditions. The heating box uses multiple electric heating rods arranged in a distributed manner, with the heat source evenly covering the entire bottom of the water chamber, resulting in rapid and uniform temperature rise and providing a continuous and stable heat input to the circulation system. Attached Figure Description
[0016] Figure 1 This is a perspective view of the present utility model; Figure 2 This is a cross-sectional view of the present invention; Figure 3 This is a schematic diagram of the heating cover of this utility model; Figure 4 This is a schematic diagram of the stirring mechanism of this utility model; Figure 5 This is a schematic diagram of the heating box of this utility model; Figure 6 This is a schematic diagram of the water collection box of this utility model; Figure 7 This is a schematic diagram of the stirring motor of this utility model.
[0017] The attached diagram lists the components represented by each number as follows: 1. Water pump; 2. Heating cover; 21. Sleeve; 22. Spiral blade; 23. Water inlet; 3. Water supply pipe; 4. Water collection box; 41. Sealing ring; 42. Water collection chamber; 5. Stirring motor; 51. Support base; 52. Clearance opening; 6. Tank cover; 7. Reactor; 8. Heating box; 81. Mounting edge; 82. Fixing base; 83. Electric heating rod; 9. Stirring mechanism; 91. Water inlet; 92. Transmission pipe; 93. Stirring rod; 94. Stirring blade. Detailed Implementation
[0018] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model.
[0019] like Figure 1 and Figure 2 As shown, a chemical reaction apparatus with a uniform heating structure includes a reaction vessel 7. A lid 6 is fixed at the upper port of the reaction vessel 7, and a stirring mechanism 9 is provided inside the reaction vessel 7. A water collection box 4 is fixed at the center of the lid 6, and a stirring motor 5 covering the outside of the water collection box 4 is fixed on the upper side of the lid 6. To solve the problems of low heating efficiency and large internal temperature difference in existing chemical reaction apparatuses, the reaction vessel 7 adopts a bidirectional heating structure. The outside of the reaction vessel 7 is heated circumferentially by a heating cover 2, while the inside is heated by a hot water channel set in the stirring mechanism 9 to heat the center of the material, realizing bidirectional heat conduction from the outside to the inside. The reaction vessel 7 is made of high thermal conductivity stainless steel, and the inner wall of the vessel is smooth to reduce material residue and improve heat transfer uniformity. The lid 6 and the reaction vessel 7 are connected by a sealing ring to form a sealed reaction chamber to prevent gas leakage during the reaction. The stirring motor 5 is a variable frequency motor, which can adjust the speed according to the reaction requirements to control the stirring intensity, thereby achieving efficient mixing and enhancing the thermal convection of materials in a high-temperature reaction environment. A heating box 8 for heating water is fixed at the lower end of the reactor 7, and a heating cover 2 is fitted on the outside of the reactor 7. A water pump 1 is installed on the lower side of the reactor 7. The inlet of the water pump 1 is connected to the heating box 8 through a pipe, and the outlet of the water pump 1 is connected to the heating cover 2 through a pipe. The heating cover 2 uses the hot water delivered by the water pump 1 to heat the outside of the reactor 7. The upper end of the heating cover 2 is connected to the water collection box 4 through a water supply pipe 3. The heating box 8 adopts a combination of electric heating and circulating water heating. The heat generated by the electric heating rod 83 is transferred to the water in the heating box 8. The heated water is delivered to the spiral channel inside the heating cover 2 by the water pump 1 for external heating. The water pump 1 is a high-temperature resistant centrifugal pump with stable flow output characteristics, which can ensure the continuous circulation of hot water in the system. The water supply pipe 3 and the water collection box 4 are connected by a high-pressure resistant metal pipe to ensure safe operation under high temperature and high pressure conditions. Through this circulation channel, the heating medium flows back and forth continuously, realizing uniform heating of the outside of the reactor 7 and avoiding the uneven heating phenomenon caused by local temperature differences in the traditional jacket heating method. The upper end of the stirring mechanism 9 passes through the water collection box 4 and is connected to the stirring motor 5. A water flow channel is provided inside the stirring mechanism 9, and the upper and lower ends of the stirring mechanism 9 are respectively connected to the water collection box 4 and the heating box 8. The internal water flow channel of the stirring mechanism 9 has a hollow structure. When the water in the heating box 8 is heated to the set temperature, it rises to the water collection box 4 through the internal channel of the transmission pipe 92 to achieve internal circulation heating. The rotation of the stirring mechanism 9 drives the stirring rod 93 and the stirring blade 94 to stir, so that the hot water forms convection in the area outside the transmission pipe 92, accelerating the heat diffusion from the central area to the outside, thereby achieving uniform heating inside the material. When the stirring motor 5 is driven, mechanical stirring and internal heating can be carried out simultaneously, which significantly improves the heat exchange efficiency. like Figure 3 As shown, the heating cover 2 has openings 21 at both the upper and lower ends that fit over the outer surface of the reactor 7. A spiral blade 22 is fixed to the inner wall of the heating cover 2. A water inlet 23 is located near the upper end of the outer side of the heating cover 2. The inner edge of the spiral blade 22 is tightly attached to the outer surface of the reactor 7. The opening 21 is tightly fitted onto the outer surface of the reactor 7 and sealed by welding. The spiral blade 22 and the inner wall of the heating cover 2 form a continuous spiral channel. Hot water flows upward along the spiral path in the channel, ensuring full contact between the hot water and the outer surface of the reactor 7, extending the residence time of the heating medium, and improving heat exchange efficiency. The water inlet 23 is positioned high to replenish water or release air during system operation, preventing air blockage in the circulation channel. The gap between the heating cover 2 and the reactor 7 is precisely designed to ensure that the hot water flow rate matches the heat transfer area, achieving continuous, stable, and uniform external heating. like Figure 4As shown, the stirring mechanism 9 includes a transmission pipe 92, the upper end of which is closed, and several water inlets 91 are provided near the upper end of the transmission pipe 92. The lower end of the transmission pipe 92 passes through the bottom of the reactor 7 and connects to the heating box 8. A bearing for rotating the transmission pipe 92 is fixed at the bottom of the reactor 7. Several evenly distributed stirring rods 93 are fixed on the outside of the transmission pipe 92, and stirring blades 94 are fixed near the lower end of the transmission pipe 92. Both the transmission pipe 92 and the stirring rods 93 are made of stainless steel. A heating water channel is constructed inside the transmission pipe 92, and the water inlets 91 are connected to the water collection box 4 for returning cooling water to the heating box 8 to form a closed loop. The stirring rods 93 are arranged in a spiral, which can form a radial and axial composite flow field when rotating, so that the material presents a three-dimensional flow state in the reactor, thereby achieving rapid temperature equalization in conjunction with hot water heating. The bottom bearing is made of high-temperature resistant lubricating material, which can ensure stable and noiseless operation during long-term operation. like Figure 5 As shown, the upper edge of the heating box 8 is fixed with a mounting edge 81, which is fixed to the lower end of the reactor 7 by screws. A fixing seat 82 is fixed to the lower side of the heating box 8, and several electric heating rods 83 extending into the heating box 8 are fixed to the upper side of the fixing seat 82. A closed water cavity is formed inside the heating box 8, and the electric heating rods 83 are distributed in the lower part of the water cavity to generate heat energy by heating the water with electrical energy. The fixing seat 82 is used to support the overall structure of the heating box 8 and to act as a heat insulation buffer to prevent heat conduction to the lower foundation structure. The mounting edge 81 is sealed and fixed by a high-temperature resistant gasket to prevent leakage of high-temperature water during operation. The design of this structure effectively realizes the rapid heating and continuous heating of the circulating water, ensuring the stable heating performance of the system. like Figure 6 As shown, a water collection chamber 42 is provided in the center of the water collection box 4, and through holes are provided at both the upper and lower ends of the water collection box 4. A sealing ring 41 is fixed inside the through hole to pass through and seal the transmission pipe 92. The water collection chamber 42 is used to collect hot water flowing back from above the heating cover 2. The sealing ring 41 is made of high-temperature resistant silicone rubber material, which can maintain good sealing performance under high temperature conditions and prevent hot water leakage. The water collection box 4 is fastened to the tank cover 6 with bolts to ensure the structural stability of high-pressure operation. like Figure 7 As shown, the lower end of the stirring motor 5 is fixed with a support base 51 covering the outside of the water collection box 4. The lower end of the support base 51 is fixed to the tank cover 6 by screws, and the side of the support base 51 has a clearance opening 52. The support base 51 serves to support the stirring motor 5, so that the stirring motor 5 remains stable when running at high speed and avoids the transmission of motor vibration to the tank cover 6. The clearance opening 52 is used for the power line or signal line to pass through, which facilitates the connection between the motor and the control system. The stirring motor 5 adopts a high torque output structure, which can maintain a stable speed during the stirring of high viscosity materials, thereby ensuring that the heat is evenly distributed inside the reaction vessel 7 and achieving efficient reaction.
[0020] The working principle of this utility model is as follows: During the mixing, stirring, and heating of the materials in the reactor, the water in the heating box 8 is heated by starting the electric heating rod 83. At the same time, the stirring motor 5 drives the transmission pipe 92 to drive the stirring rod 93 and stirring blade 94 to stir the materials. At this time, the water pump 1 is started to draw away the hot water in the heating box 8 and send it to the inside of the heating cover 2. The hot water entering the heating cover 2 flows upward along the spiral channel formed by the spiral blades 22 and heats the reactor 7 from the outside. When the cold water in the heating cover 2 enters the water collection box through the water supply pipe 3, it is heated by the water supply pipe 3. Inside the water collection box 4, the water enters the transmission pipe 92 through the water inlet 91 and finally enters the heating box 8 for heating and is sent to the heating cover 2, thus realizing water circulation. After the circulating water is fully heated, it will continuously heat the reactor 7 from the outside. At the same time, the hot water flowing through the transmission pipe 92 heats the transmission pipe 92 and the stirring rod 93, thus heating from the center of the reactor 7. This completes the simultaneous heating of the material in the reactor 7 from the outside and the inside, and with the stirring of the stirring rod 93 and the stirring blade 94, it completes the rapid and uniform heating of the material over a large area.
[0021] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, shall be implemented using conventional methods in the field.
Claims
1. A chemical reaction apparatus with a uniform heating structure, comprising a reaction vessel (7), characterized in that: The upper port of the reactor (7) is fixed with a tank cover (6), and a stirring mechanism (9) is provided on the inner side of the reactor (7). A water collection box (4) is fixed in the center of the tank cover (6), and a stirring motor (5) covering the outside of the water collection box (4) is fixed on the upper side of the tank cover (6). The lower end of the reactor (7) is fixed with a heating box (8) for heating water, and a heating cover (2) is fitted on the outside of the reactor (7). A water pump (1) is provided on the lower side of the reactor (7). The water inlet of the water pump (1) is connected to the heating box (8) through a pipe, and the water outlet of the water pump (1) is connected to the heating cover (2) through a pipe. The heating cover (2) uses the hot water delivered by the water pump (1) to heat the outside of the reactor (7). The upper end of the heating cover (2) is connected to the water collection box (4) through a water supply pipe (3). The upper end of the stirring mechanism (9) passes through the water collection box (4) and is connected to the stirring motor (5). A water flow channel is provided on the inner side of the stirring mechanism (9), and the upper and lower ends of the stirring mechanism (9) are respectively connected and cooperated with the water collection box (4) and the heating box (8).
2. A chemical reaction apparatus with a uniform heating structure according to claim 1, characterized in that: The heating cover (2) has openings (21) at both the upper and lower ends that fit around the outside of the reactor (7), and the inner wall of the heating cover (2) is fixed with a spiral blade (22). A water inlet (23) is provided on the outer side of the heating cover (2) near the upper end. The inner edge of the spiral blade (22) is in close contact with the outer surface of the reactor (7). The opening (21) is fitted onto the outer surface of the reactor (7) and sealed by welding.
3. A chemical reaction apparatus with a uniform heating structure according to claim 1, characterized in that: The stirring mechanism (9) includes a transmission pipe (92), the upper end of which is closed, and several water inlets (91) are provided near the upper end of the transmission pipe (92). The lower end of the transmission pipe (92) passes through the bottom of the reactor (7) and is connected to the heating box (8). The bottom of the reactor (7) is fixed with a bearing for rotating the transmission pipe (92).
4. A chemical reaction apparatus with a uniform heating structure according to claim 3, characterized in that: Several evenly distributed stirring rods (93) are fixed on the outside of the transmission tube (92), and stirring blades (94) are fixed near the lower end of the transmission tube (92). Both the transmission tube (92) and the stirring rods (93) are made of stainless steel.
5. A chemical reaction apparatus with a uniform heating structure according to claim 4, characterized in that: The upper port edge of the heating box (8) is fixed with an installation edge (81), which is fixed to the lower end of the reactor (7) by screws. The lower side of the heating box (8) is fixed with a fixing seat (82), and the upper side of the fixing seat (82) is fixed with several electric heating rods (83) extending into the heating box (8).
6. A chemical reaction apparatus with a uniform heating structure according to claim 4, characterized in that: The water collection box (4) has a water collection cavity (42) in the center, and the upper and lower ends of the water collection box (4) are provided with through holes. A sealing ring (41) is fixed on the inner side of the through hole to allow the transmission pipe (92) to pass through and seal.
7. A chemical reaction apparatus with a uniform heating structure according to claim 1, characterized in that: The lower end of the stirring motor (5) is fixed with a support base (51) covering the outside of the water collection box (4). The lower end of the support base (51) is fixed to the tank cover (6) by screws, and the side of the support base (51) is provided with a clearance opening (52).