Heat exchange device of reaction kettle

Abstract

The utility model relates to the technical field of reaction kettles, in particular to a heat exchange device of a reaction kettle, which comprises a kettle body, a motor is mounted at the top of the kettle body through a motor mounting frame, an output shaft of the motor is connected with the top of a stirring shaft through a coupler, the stirring shaft is positioned in the kettle body, and stirring blades are fixedly arranged at the bottom of the stirring shaft. A discharging pipe is arranged at the bottom of the kettle body, a heat exchange mechanism is arranged on the outer side of the kettle body, an interlayer inner cavity with a hollow structure inside is formed in the side wall, close to the bottom, of the kettle body, the heat exchange mechanism is communicated with the interlayer inner cavity, and a temperature probe is further installed at the bottom of the kettle body; according to the heat exchange device of the reaction kettle, the temperature can be controlled more efficiently, overheating or supercooling can be avoided, so that the overall energy efficiency is improved, more accurate temperature control can be achieved, temperature fluctuation is reduced, the stability of the reaction process and the product quality are improved, and the flow speed of heat exchange water can be automatically adjusted according to the requirements of different reaction stages; the device is suitable for various reaction conditions, and the universality and flexibility of the device are enhanced.

Description

Technical Field

[0001] This utility model relates to the field of reaction vessel technology, specifically to a heat exchange device for a reaction vessel. Background Technology

[0002] Existing heat exchange devices for reactors are basically divided into three types: jacketed heat exchange devices, coil heat exchange devices, and external circulation heat exchange devices. Regardless of the method used, a circulation pump is required as the driving force. During the entire heat exchange process, the circulation pump always operates at its rated power, resulting in a fixed flow rate of the heat exchange water, which cannot be dynamically adjusted according to changes in the internal temperature of the reactor. In the initial low-temperature stage, an excessively fast flow rate of the heat exchange water will cause energy waste; while in the high-temperature stage, insufficient flow rate may lead to inaccurate temperature control, reduce overall energy efficiency, and make it difficult to flexibly adjust the flow rate of the heat exchange water according to the needs of different reaction stages, thus limiting the versatility and applicability of the equipment. Utility Model Content

[0003] To address the shortcomings of existing technologies, this invention provides a heat exchange device for a reaction vessel, solving the technical problem that the flow rate of the hot water for heat exchange cannot be dynamically adjusted.

[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a heat exchange device for a reaction vessel, including a vessel body, a motor mounted on the top of the vessel body via a motor mounting bracket, the output shaft of the motor being connected to the top of a stirring shaft via a coupling, the stirring shaft being located inside the vessel body, stirring blades being fixed at the bottom of the stirring shaft, a discharge pipe being provided at the bottom of the vessel body, a heat exchange mechanism being provided on the outer side of the vessel body, a hollow-structured jacketed cavity being provided in the side wall of the vessel body near the bottom, the heat exchange mechanism being connected to the jacketed cavity, and a temperature probe being installed at the bottom of the vessel body;

[0005] The heat exchange mechanism includes a variable frequency circulating pump, which is installed at the bottom of the heat exchange box. A heat exchange tube is provided inside the heat exchange box. One end of the heat exchange tube is connected to the liquid inlet of the variable frequency circulating pump, and the liquid outlet of the variable frequency circulating pump is connected to one end of the coolant inlet pipe. The other end of the coolant inlet pipe is connected to the bottom of the inner cavity of the jacket. A coolant tank is also fixed on the heat exchange box. The top of the coolant tank is connected to a coolant outlet pipe, and the bottom is connected to the other end of the heat exchange tube through a connecting pipe. One end of the coolant outlet pipe is connected to the top of the inner cavity of the jacket.

[0006] Preferably, the heat exchange tube has a curved serpentine structure.

[0007] Preferably, the heat exchange box has a hot water inlet pipe and a hot water outlet pipe connected to its side wall.

[0008] Preferably, a coolant replenishment pipe is connected to the top of the coolant tank, and a ball valve located inside the coolant tank is installed at one end of the coolant replenishment pipe.

[0009] Preferably, a PLC controller is installed on the variable frequency circulating pump, and the PLC controller is electrically connected to the variable frequency circulating pump and the temperature probe.

[0010] Preferably, the inside of the vessel body has an annular protrusion on the side wall near the inner cavity of the interlayer.

[0011] By employing the above technical solution, this utility model provides a heat exchange device for a reaction vessel, which has at least the following beneficial effects:

[0012] 1. The heat exchange device of this reactor, through the installation of temperature probes and heat exchange mechanisms, uses temperature probes to monitor the internal temperature of the reactor in real time and feeds it back to the PLC controller. The PLC controller then adjusts the operating power of the variable frequency circulating pump. This allows for a reduction in the coolant circulation rate at low temperatures and an increase in the coolant circulation rate at high temperatures, enabling more efficient temperature control, avoiding overheating or overcooling, thereby improving overall energy efficiency. It also allows for more precise temperature control, reducing temperature fluctuations, improving the stability of the reaction process and product quality. Furthermore, it can automatically adjust the hot water flow rate according to the needs of different reaction stages, making it suitable for various reaction conditions and enhancing the versatility and flexibility of the equipment.

[0013] 2. The heat exchange device of this reactor can automatically replenish the coolant tank by setting a coolant replenishment pipe and a ball valve, so as to avoid the problem of insufficient coolant affecting the heat exchange efficiency.

[0014] 3. The heat exchange device of this reactor, by setting an annular protrusion, can increase the internal surface area of ​​the reactor body, so that the coolant in the jacket cavity can absorb heat more quickly and achieve a better heat exchange effect. Attached Figure Description

[0015] The accompanying drawings, which are included to provide a further understanding of the present invention, form part of this application:

[0016] Figure 1 This is a three-dimensional structural diagram of the entire utility model;

[0017] Figure 2 This is a cross-sectional structural diagram of the vessel body of this utility model;

[0018] Figure 3 This is a cross-sectional structural schematic diagram of the heat exchanger box of this utility model;

[0019] Figure 4 This is a schematic diagram of the structure of the coolant tank of this utility model;

[0020] Figure label:

[0021] 1. Reactor body; 2. Motor mounting bracket; 3. Motor; 4. Coupling; 5. Stirring shaft; 6. Stirring blades; 7. Heat exchange mechanism; 701. Variable frequency circulating pump; 702. Heat exchange box; 703. Heat exchange tube; 704. Coolant inlet pipe; 705. Coolant tank; 706. Coolant outlet pipe; 707. Connecting pipe; 708. Hot water inlet pipe; 709. Hot water outlet pipe; 710. Coolant replenishment pipe; 711. Ball valve; 712. PLC controller; 8. Jacketed inner cavity; 9. Annular protrusion; 10. Discharge pipe; 11. Temperature probe. Detailed Implementation

[0022] 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.

[0023] As a core piece of equipment widely used in chemical, pharmaceutical, and food industries, the main function of a reaction vessel is to carry out chemical reactions, mixing, and dissolution processes. In these processes, temperature control is one of the key factors in ensuring reaction efficiency and product quality. Therefore, reaction vessels are typically equipped with heat exchangers to achieve precise temperature control of the reactants.

[0024] Due to the technical limitation of existing technologies that cannot dynamically adjust the hot water flow rate, please refer to... Figures 1-4This invention provides a heat exchange device for a reaction vessel. It can reduce the cooling liquid circulation rate at low temperatures and increase it at high temperatures, enabling more efficient temperature control, preventing overheating or overcooling, thus improving overall energy efficiency. It also allows for more precise temperature control, reducing temperature fluctuations, improving the stability of the reaction process and product quality. Furthermore, it can automatically adjust the hot water flow rate according to the needs of different reaction stages, making it suitable for various reaction conditions and enhancing the equipment's versatility and flexibility. The device includes a vessel body 1, with a motor 3 mounted on the top of the vessel body 1 via a motor mounting bracket 2. The output shaft of the motor 3 is connected to the top of a stirring shaft 5 via a coupling 4. The stirring shaft 5 is located inside the vessel body 1, and a stirring agitator is fixed to the bottom of the stirring shaft 5. The bottom of the vessel body 1 is equipped with a discharge pipe 10, and the outer side of the vessel body 1 is equipped with a heat exchange mechanism 7. The side wall of the vessel body 1 near the bottom is equipped with a hollow inner cavity 8. The heat exchange mechanism 7 is connected to the inner cavity 8. A temperature probe 11 is also installed at the bottom of the vessel body 1. In use, the motor 3 drives the stirring shaft 5 to rotate, and the stirring shaft 5 drives the stirring blade 6 to rotate, thereby stirring the reactants to improve the reaction process. During the reaction, the temperature probe 11 monitors the internal temperature of the vessel body 1 in real time and feeds it back to the PLC controller 712. The PLC controller 712 changes the operating power of the variable frequency circulating pump 701, so that the coolant circulation flow rate can be reduced at low temperatures and increased at high temperatures.

[0025] Throughout the heat exchange process, the circulating pump operates at its rated power, resulting in a fixed flow rate of the hot water that cannot be dynamically adjusted according to changes in the internal temperature of the reactor. Based on the above issues, please refer to... Figure 1 The heat exchange mechanism 7 includes a variable frequency circulating pump 701, which is installed at the bottom of the heat exchange box 702. A heat exchange tube 703 is provided inside the heat exchange box 702. One end of the heat exchange tube 703 is connected to the inlet end of the variable frequency circulating pump 701, and the outlet end of the variable frequency circulating pump 701 is connected to one end of a coolant inlet pipe 704. The other end of the coolant inlet pipe 704 communicates with the bottom of the jacketed inner cavity 8. A coolant tank 705 is also fixed on the heat exchange box 702, and a coolant outlet pipe 706 is connected to the top of the coolant tank 705. The bottom is connected to the other end of the heat exchange tube 703 via a connecting pipe 707, and one end of the coolant outlet pipe 706 is connected to the top of the jacketed inner cavity 8. When the variable frequency circulating pump 701 is working, the coolant enters the jacketed inner cavity 8 through the coolant inlet pipe 704. After absorbing heat, the coolant returns to the coolant tank 705 through the coolant outlet pipe 706, and then enters the heat exchange tube 703 through the connecting pipe 707. In the heat exchange box 702, the hot water absorbs the heat carried by the coolant, and then the coolant circulates again.

[0026] When coolant enters the heat exchanger 702, if the heat exchange tube 703 is straight, the coolant will flow out of the heat exchanger 702 quickly, resulting in poor heat exchange performance. To address this issue, the heat exchange tube 703 is designed with a curved, serpentine structure. This increases the contact area between the heat exchange tube 703 and the hot water, while also increasing the coolant flow path length, thus improving the heat exchange effect.

[0027] Furthermore, a hot water inlet pipe 708 and a hot water outlet pipe 709 are connected to the side wall of the heat exchange box 702; the hot water can enter and exit the heat exchange box 702 through the hot water inlet pipe 708 and the hot water outlet pipe 709.

[0028] After prolonged circulation, the coolant level will decrease. Excessive decrease can affect the heat exchange efficiency of the coolant. To address this, a coolant replenishment pipe 710 is connected to the top of the coolant tank 705. A ball valve 711 is installed at one end of the coolant replenishment pipe 710 inside the coolant tank 705. By setting up the coolant replenishment pipe 710 and the ball valve 711, coolant can be automatically replenished into the coolant tank 705, avoiding the problem of insufficient coolant affecting heat exchange efficiency.

[0029] Furthermore, a PLC controller 712 is installed on the variable frequency circulating pump 701. The PLC controller 712 is electrically connected to the variable frequency circulating pump 701 and the temperature probe 11. The temperature probe 11 monitors the internal temperature of the vessel 1 in real time and feeds it back to the PLC controller 712, which can then change the operating power of the variable frequency circulating pump 701.

[0030] Since the inner wall of the existing vessel body 1 is flat, the contact area between the inner wall of the vessel body 1 and the reactants is limited, which affects the heat absorption efficiency of the coolant. To address this, an annular protrusion 9 is provided on the side wall of the vessel body 1 near the inner cavity 8 of the jacket. By providing the annular protrusion 9, the inner surface area of ​​the vessel body 1 can be increased, allowing the coolant in the inner cavity 8 of the jacket to absorb heat more quickly and achieve a better heat exchange effect.

[0031] It should be noted that the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0032] 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. A heat exchange device for a reaction vessel, comprising a vessel body (1), wherein a motor (3) is mounted on the top of the vessel body (1) via a motor mounting bracket (2), the output shaft of the motor (3) is connected to the top of a stirring shaft (5) via a coupling (4), the stirring shaft (5) is located inside the vessel body (1), stirring blades (6) are fixedly provided at the bottom of the stirring shaft (5), and a discharge pipe (10) is provided at the bottom of the vessel body (1), characterized in that: The outer side of the vessel body (1) is provided with a heat exchange mechanism (7), and the side wall of the vessel body (1) near the bottom is provided with a hollow inner cavity (8). The heat exchange mechanism (7) is connected to the inner cavity (8), and a temperature probe (11) is also installed at the bottom of the vessel body (1). The heat exchange mechanism (7) includes a variable frequency circulating pump (701), which is installed at the bottom of the heat exchange box (702). The heat exchange box (702) is provided with a heat exchange tube (703). One end of the heat exchange tube (703) is connected to the liquid inlet of the variable frequency circulating pump (701), and the liquid outlet of the variable frequency circulating pump (701) is connected to one end of the coolant inlet pipe (704). The other end of the coolant inlet pipe (704) is connected to the bottom of the interlayer cavity (8). A coolant tank (705) is also fixed on the heat exchange box (702). The top of the coolant tank (705) is connected to a coolant outlet pipe (706), and the bottom is connected to the other end of the heat exchange tube (703) through a connecting pipe (707). One end of the coolant outlet pipe (706) is connected to the top of the interlayer cavity (8).

2. The heat exchange device for the reactor according to claim 1, characterized in that: The heat exchange tube (703) has a curved serpentine structure.

3. The heat exchange device for the reactor according to claim 1, characterized in that: The heat exchange box (702) is connected to a hot water inlet pipe (708) and a hot water outlet pipe (709) on its side wall.

4. The heat exchange device for the reactor according to claim 1, characterized in that: The top of the coolant tank (705) is connected to a coolant replenishment pipe (710), and a ball valve (711) located inside the coolant tank (705) is installed at one end of the coolant replenishment pipe (710).

5. The heat exchange device for the reactor according to claim 1, characterized in that: A PLC controller (712) is installed on the variable frequency circulating pump (701), and the PLC controller (712) is electrically connected to the variable frequency circulating pump (701) and the temperature probe (11).

6. The heat exchange device for the reactor according to claim 1, characterized in that: The vessel body (1) has an annular protrusion (9) on the side wall near the inner cavity (8) of the interlayer.

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