Self-cleaning reaction kettle

Abstract

The self-cleaning reaction kettle comprises a kettle body, a stirring device and a sleeve lifting assembly, the stirring device is provided with a stirring shaft rotationally arranged in the kettle body, a liquid conveying cavity for containing cleaning liquid is formed in the stirring shaft, a liquid outlet is formed in the cavity wall of the liquid conveying cavity, and the sleeve lifting assembly is arranged on the stirring shaft. The sleeve lifting assembly is arranged on the outer side of the stirring shaft in a lifting and sleeving manner and is provided with a liquid outlet passage communicated with the liquid outlet, a nozzle communicated with the liquid outlet passage is formed in the sleeve lifting assembly, and the sleeve lifting assembly is arranged to automatically lift along with the change of the liquid level in the kettle body, so that the nozzle is aligned with residual materials on the inner wall of the kettle body; according to the self-cleaning reaction kettle, the kettle body cleaning step can be executed while the slurry discharging step is executed, the cleaning time is saved, and the inner wall of the kettle body can be cleaned immediately after the liquid level surface descends, so that residual slurry is effectively prevented from being dried and agglomerated on the kettle wall, and the cleaning effect on the inner wall of the kettle body is good.

Description

Technical Field

[0001] This utility model belongs to the field of chemical production equipment technology, specifically relating to a self-cleaning reactor. Background Technology

[0002] Reactors are commonly used equipment in chemical production. During batch production, materials are discharged from the reactor. Due to the high temperature of the reactor wall during discharge, the liquid level drops, causing the wall to dry rapidly and leading to scaling. This scale affects heat transfer in the reaction process. Furthermore, the scale is typically hard and lumpy, which may detach during subsequent reactions, affecting product consistency and causing blockages during material transfer, halting production and generating waste. Preventing scale buildup, ensuring process stability, and maintaining product consistency have long been challenging problems for production technicians in the industry. Existing reactors suffer from problems such as the inability to dynamically clean as the liquid level drops, long cleaning times, and the tendency for residual materials on the reactor wall to accumulate and form scale if not cleaned promptly. Utility Model Content

[0003] To address the aforementioned defects or shortcomings, this utility model provides a self-cleaning reactor, aiming to solve the technical problems in the prior art where the reactor cleaning equipment does not clean the reactor wall in a timely manner, is time-consuming, and easily produces wall-forming material.

[0004] To achieve the above objectives, the first aspect of this utility model provides a self-cleaning reactor, including a reactor body, a stirring device, and a sleeve lifting assembly; the stirring device has a stirring shaft rotatably disposed within the reactor body, a liquid delivery chamber for holding cleaning liquid is formed on the stirring shaft, and a liquid outlet is provided on the wall of the liquid delivery chamber; the sleeve lifting assembly is movably sleeved on the outside of the stirring shaft and has a liquid outlet passage communicating with the liquid outlet, the sleeve lifting assembly is provided with a nozzle communicating with the liquid outlet passage, and the sleeve lifting assembly is configured to automatically lift and lower according to the liquid level change within the reactor body, so that the nozzle is aligned with the residual material on the inner wall of the reactor body.

[0005] Through the above technical solution, the self-cleaning reactor provided by this utility model embodiment has the following beneficial effects:

[0006] When using the self-cleaning reactor described above, in the initial state, the reactor body contains slurry, and the nozzle on the sleeve lifting assembly is located above the liquid level of the slurry. Since the sleeve lifting assembly is designed to automatically rise and fall according to the changes in the liquid level inside the reactor, during the process of slurry discharge, as the liquid level inside the reactor decreases, the sleeve lifting assembly also descends synchronously. During the descent, the nozzle continuously sprays cleaning liquid onto the inner wall of the reactor to clean the residual slurry on the inner wall. That is, the reactor body cleaning step is performed simultaneously with the slurry discharge step, saving cleaning time. Moreover, the inner wall of the reactor can be cleaned immediately after the liquid level drops, thereby effectively preventing the residual slurry from drying and clumping on the reactor wall, resulting in a good cleaning effect on the inner wall of the reactor.

[0007] In this embodiment of the invention, the stirring shaft is hollow to form a liquid delivery chamber, and the stirring shaft is provided with an inlet and an outlet at intervals from top to bottom. The self-cleaning reactor also includes a liquid delivery assembly, which includes a liquid delivery pipe and a liquid delivery driver. The liquid delivery driver is located outside the reactor body, and the liquid delivery pipe connects the liquid delivery driver and the inlet.

[0008] In this embodiment of the utility model, the sleeve lifting assembly includes an inner sleeve and an outer sleeve that are sequentially sleeved from the inside to the outside. The inner sleeve is fixedly sleeved on the stirring shaft corresponding to the liquid outlet. A liquid outlet passage is opened on the inner sleeve, and a nozzle is opened on the outer sleeve. The outer sleeve is designed to automatically lift and lower according to the liquid level change in the vessel.

[0009] In this embodiment of the invention, a sliding pair is provided between the inner sleeve and the outer sleeve, and the outer sleeve can be raised and lowered along the sliding pair.

[0010] In this embodiment of the utility model, the sleeve lifting assembly further includes a level gauge and a lifting drive. The level gauge is installed on the outer sleeve and is used to detect the liquid level in the vessel in real time. The lifting drive is communicatively connected to the level gauge and is used to drive the outer sleeve to move along the stirring shaft according to the detection result of the level gauge.

[0011] In this embodiment of the invention, a permanent magnet is provided at the bottom of the outer tube, and the lifting drive is a magnetic coupling motor. The magnetic coupling motor is located at the bottom of the vessel and is used to drive the permanent magnet to lift the outer tube.

[0012] In this embodiment of the invention, sealing components are provided at both ends of the outer sleeve, and the sealing components are sealed and fitted to the outer wall of the inner sleeve.

[0013] In this embodiment of the utility model, the sealing assembly includes a sealing ring and a bellows. The bellows is sleeved on the inner sleeve and connected to the outer sleeve. A sealing ring is provided on the inner side of the bellows, and the sealing ring is sealed and fitted to the outer wall of the inner sleeve.

[0014] In this embodiment of the utility model, a feed sleeve is provided at one end of the infusion tube connected to the inlet. The feed sleeve allows the stirring shaft to rotatably pass through it, and the feed sleeve and the stirring shaft enclose and form an inlet channel connecting the infusion tube and the inlet.

[0015] In this embodiment of the invention, the infusion assembly further includes a pressure gauge and a controller. The pressure gauge is used to detect the pressure inside the infusion tube, and the controller is communicatively connected to both the pressure gauge and the infusion driver, and is used to adjust the output flow of the infusion driver according to a preset pressure.

[0016] In this embodiment of the invention, the nozzle extends along the axial direction of the stirring shaft, the width of the nozzle is set to 1-3 mm, and the length of the nozzle is set to 5-8 cm.

[0017] In this embodiment of the invention, the nozzle is tapered outward along the radial direction of the stirring shaft.

[0018] In this embodiment of the invention, the included angle formed by the extension lines of the two side walls of the nozzle is 10 to 15°.

[0019] Other features and advantages of this invention will be described in detail in the following detailed description section. Attached Figure Description

[0020] The accompanying drawings are provided to illustrate the present invention and form part of the specification. They are used together with the following detailed description to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0021] Figure 1 This is a schematic diagram of the structure of a self-cleaning reactor according to an embodiment of the present invention;

[0022] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0023] Figure 3 This is a schematic cross-sectional view of a self-cleaning reactor according to an embodiment of the present invention;

[0024] Figure 4 yes Figure 3 Enlarged view of point B in the middle;

[0025] Figure 5 This is a longitudinal cross-sectional schematic diagram of a self-cleaning reactor according to an embodiment of the present invention.

[0026] Explanation of reference numerals in the attached figures

[0027] 1. Kettle body 2. Stirring shaft

[0028] 21 Infusion chamber 22 Infusion inlet

[0029] 23. Outlet 3. Sleeve lifting assembly

[0030] 31 Inner sleeve 310 Liquid outlet passage

[0031] 32 Outer tube 320 nozzle

[0032] 33 Lifting drive component 34 Level gauge

[0033] 4. Infusion Assembly 41. Infusion Tubing

[0034] 42 Infusion actuator 43 Pressure gauge

[0035] 44 Feed sleeve 5 Sealing assembly

[0036] 6 drive motors Detailed Implementation

[0037] The specific embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this application.

[0038] The following is a reference appendix. Figures 1 to 5 This invention describes a self-cleaning reactor.

[0039] like Figures 1 to 5 As shown, this utility model provides a self-cleaning reactor, comprising:

[0040] 1. Pot body;

[0041] The stirring device has a stirring shaft 2 rotatably disposed in the vessel body 1, and a liquid delivery chamber 21 for holding cleaning liquid is formed on the stirring shaft 2, and a liquid outlet 23 is provided on the cavity wall of the liquid delivery chamber 21.

[0042] The sleeve lifting assembly 3 is movably sleeved on the outside of the stirring shaft 2 and has a liquid outlet passage 310 communicating with the liquid outlet 23. The sleeve lifting assembly 3 is provided with a nozzle 320 communicating with the liquid outlet passage 310. The sleeve lifting assembly 3 is designed to automatically lift and lower according to the liquid level change in the vessel body 1 so that the nozzle 320 is aligned with the inner wall of the vessel body 1.

[0043] When using the self-cleaning reactor described above, in the initial state, the reactor body 1 contains slurry, and the nozzle 320 on the sleeve lifting assembly 3 is located above the liquid level of the slurry. Since the sleeve lifting assembly 3 is designed to automatically rise and fall in accordance with the changes in the liquid level inside the reactor body 1, during the process of discharging slurry from the reactor body 1, as the liquid level inside the reactor body 1 decreases, the sleeve lifting assembly 3 also descends synchronously. During the descent, the nozzle 320 continuously sprays cleaning liquid onto the inner wall of the reactor body 1 to clean the residual slurry on the inner wall of the reactor body 1. That is, the cleaning step of the reactor body 1 is performed at the same time as the slurry discharge step, saving cleaning time. Moreover, the inner wall of the reactor body 1 can be cleaned immediately after the liquid level drops, thereby effectively preventing the residual slurry from drying and clumping on the reactor wall, resulting in a good cleaning effect on the inner wall of the reactor body 1.

[0044] Specifically, the installation position of the casing lifting assembly 3 avoids the blade setting, or the blade is set on the casing lifting assembly 3, so that the casing lifting assembly 3 and the blade do not interfere with each other.

[0045] Specifically, a drive motor 6 is installed on the top of the vessel body 1, and the drive motor 6 drives the stirring shaft 2.

[0046] like Figure 1 , 2 3 and Figure 5 As shown in this embodiment of the invention, the stirring shaft 2 is hollow to form a liquid delivery chamber 21, and the stirring shaft 2 is provided with an inlet 22 and an outlet 23 spaced apart from top to bottom. The self-cleaning reactor also includes a liquid delivery assembly 4, which includes a liquid delivery pipe 41 and a liquid delivery actuator 42. The liquid delivery actuator 42 is located outside the reactor body 1, and the liquid delivery pipe 41 connects the liquid delivery actuator 42 and the inlet 22. The liquid delivery actuator 42 is a hydraulic pump used to deliver the cleaning liquid at a constant pressure or flow rate through the liquid delivery pipe 41 to the inlet 22 of the stirring shaft 2. The cleaning liquid reaches the outlet 23 through the liquid delivery chamber 21. The liquid delivery assembly 4 is set independently of the reactor body 1, which facilitates its maintenance and replacement.

[0047] Furthermore, such as Figure 1 As shown, the infusion assembly 4 also includes a pressure gauge 43 and a controller (not shown). The pressure gauge 43 is used to detect the pressure inside the infusion tube 41. The controller is connected to the pressure gauge 43 and the infusion driver 42 respectively, and is used to adjust the infusion driver 42 according to the preset pressure, thereby controlling the output flow rate of the cleaning fluid.

[0048] like Figure 3 , Figure 4 and Figure 5As shown in this embodiment of the invention, the sleeve lifting assembly 3 includes an inner sleeve 31 and an outer sleeve 32, which are sequentially sleeved from the inside to the outside. The inner sleeve 31 is fixedly sleeved on the stirring shaft 2 corresponding to the liquid outlet 23. A liquid outlet channel 310 is provided on the inner sleeve 31, and a nozzle 320 is provided on the outer sleeve 32. The outer sleeve 32 is designed to automatically rise and fall in accordance with the changes in the liquid level inside the vessel 1. The arrangement of the inner and outer sleeves prevents the movement of the outer sleeve 32 from causing wear on the stirring shaft 2.

[0049] Specifically, the inner sleeve 31 and the outer sleeve 32 are preferably made of stainless steel; further, the inner sleeve 31 and the outer sleeve 32 are made of one or a combination of 316L, 2205, 904L, and 2507.

[0050] In this embodiment of the invention, a sliding joint is provided between the inner sleeve 31 and the outer sleeve 32, allowing the outer sleeve 32 to be raised and lowered along the sliding joint. The design of the sliding joint makes the raising and lowering of the outer sleeve 32 more stable, effectively avoiding jamming or deviation during the raising and lowering process. Furthermore, the sliding joint also has a limiting function, allowing the outer sleeve 32 to rotate synchronously with the stirring shaft 2, ensuring that the cleaning liquid can be sprayed to cover the inner wall of the vessel body 1. Specifically, the sliding joint is configured as a sliding groove formed on the inner sleeve 31 and a slider portion that embeds into the sliding groove from the outer sleeve 32.

[0051] like Figure 1 and 3 As shown in this embodiment of the invention, the sleeve lifting assembly 3 further includes a level gauge 34 and a lifting drive 33. The level gauge 34 is mounted on the outer sleeve 32 and is used to detect the liquid level in the vessel 1 in real time. The lifting drive 33 is communicatively connected to the level gauge 34 and is used to drive the outer sleeve 32 to move along the stirring shaft 2 according to the detection result of the level gauge 34. Through the cooperative design of the level gauge 34 and the lifting drive 33, precise control of the lifting of the outer sleeve 32 is achieved. When the liquid level changes, the level gauge 34 can quickly and accurately detect the change in liquid level and transmit this information to the lifting drive 33 in a timely manner. After receiving the signal, the lifting drive 33 responds quickly and drives the outer sleeve 32 to move accordingly along the axial direction of the stirring shaft 2 according to the specific liquid level. In this way, regardless of whether the liquid level inside the vessel 1 rises or falls, the nozzle 320 on the outer sleeve 32 can always be kept in the optimal cleaning position, ensuring that the cleaning fluid can clean the inner wall of the vessel 1 in a timely and effective manner, which greatly improves the cleaning effect and stability of the self-cleaning reactor under different liquid level conditions.

[0052] Of course, this utility model is not limited to this. The material or structure of the outer tube 32 can also be designed so that the outer tube 32 can be partially above the liquid level. Then, changes in the liquid level will cause the outer tube 32 to rise and fall synchronously. The nozzle 320 is designed on the part of the outer tube 32 that is above the liquid level.

[0053] In this embodiment of the invention, a permanent magnet is provided at the bottom end of the outer sleeve 32, and the lifting drive component 33 is a magnetic coupling motor. The magnetic coupling motor is located at the bottom of the vessel body 1 and is used to drive the permanent magnet to lift and lower the outer sleeve 32. This arrangement utilizes the principle of magnetic coupling, making the power transmission more efficient and stable. The magnetic field generated by the magnetic coupling motor can interact precisely with the permanent magnet, avoiding the wear and failure problems that may be caused by traditional mechanical connections. At the same time, since the magnetic coupling motor is located at the bottom of the vessel body 1 and does not directly contact the material inside the vessel body 1, the risk of material corrosion to the motor is effectively reduced, extending the service life of the motor and further improving the overall reliability and stability of the self-cleaning reactor. Moreover, by adjusting parameters such as the magnetic field strength and frequency of the magnetic coupling motor, the speed and height at which the permanent magnet drives the outer sleeve 32 to lift and lower can be flexibly and precisely controlled to adapt to the diverse needs of cleaning positions under different working conditions, providing a strong guarantee for the efficient operation of the self-cleaning reactor.

[0054] Specifically, the magnetic coupling motor can be a linear motor, which is the most direct way to drive linear movement of the magnetic coupling motor without the need for an intermediate transmission mechanism; or, the magnetic coupling motor can also be in the form of a rotary motor + magnetic coupling + ball screw, where the output shaft of the rotary motor transmits torque to the ball screw without contact through the magnetic coupling, and the rotation of the screw is converted into the linear motion of the nut, which is then connected to the outer sleeve 32.

[0055] like Figure 5 As shown in this embodiment of the invention, sealing components 5 are provided at both ends of the outer sleeve 32. The sealing components 5 are sealed and fitted to the outer wall of the inner sleeve 31 to ensure that the cleaning liquid can only be sprayed out from the nozzle 320 and to prevent liquid in the vessel body 1 from entering between the inner and outer sleeves and causing blockage. Specifically, the sealing ring used in the sealing component 5 is fitted to the moving pair between the inner and outer sleeves. For example, if a sliding groove is provided on the inner sleeve 31, the sealing ring is arranged around the inner sleeve 31 and has a protruding structure embedded in the sliding groove.

[0056] In this embodiment of the invention, the sealing assembly 5 includes a sealing ring and a bellows. The bellows is fitted onto the inner sleeve 31 and connected to the outer sleeve 32. A sealing ring is provided on the inner side of the bellows, and the sealing ring is sealed and fitted tightly against the outer wall of the inner sleeve 31. The sealing ring serves a sealing function, while the bellows compensates for thermal expansion displacement. The sealing ring can be made of PTFE, which is resistant to high temperatures and corrosion. The bellows can deform to a certain extent as the outer sleeve 32 moves up and down, yet it always maintains a tight connection with the outer sleeve 32, ensuring reliable sealing. This design also allows the sealing assembly 5 to operate stably under complex working conditions, such as when the temperature and pressure inside the reactor are constantly changing, effectively preventing sealing failure caused by thermal expansion or mechanical vibration.

[0057] like Figure 2 As shown in this embodiment of the invention, a feed sleeve 44 is provided at one end of the infusion pipe 41 that connects to the inlet 22. The feed sleeve 44 allows the stirring shaft 2 to rotatably pass through, and the feed sleeve 44 and the stirring shaft 2 enclose each other to form an inlet channel connecting the infusion pipe 41 and the inlet 22. The feed sleeve 44 is used to smoothly input cleaning liquid into the stirring shaft 2 without affecting the rotation of the stirring shaft 2.

[0058] Specifically, the feed bushing 44 includes a sleeve and a shaft seal. The inner wall of the sleeve and the stirring shaft 2 form an annular channel. Both ends of the annular channel are provided with bearings and shaft seals. The side opposite to the two bearings is defined as the inner end face, and the side opposite to the two bearings is defined as the outer end face. The shaft seal is located on the inner end face of the corresponding bearing and is used to seal the annular channel.

[0059] Furthermore, a sealing ring is sandwiched between the sealing end cap of the feed bushing 44 and the bearing. The additional sealing ring between the sealing end cap and the bearing forms a third line of defense for sealing, creating a three-stage sealing system of "shaft seal-bearing-sealing ring". The sealing end cap is subjected to radial clamping force by pre-tightening bolts, causing the sealing ring to undergo elastic deformation and forming uniform contact pressure on the end face, thereby improving the reliability of the seal.

[0060] Furthermore, in this embodiment of the invention, the nozzle 320 extends along the axial direction of the stirring shaft 2, with a width of 1–3 mm and a length of 5–8 cm. The nozzle 320 tapers outwards along the radial direction of the stirring shaft 2. The included angle formed by the extended lines of the two side walls of the nozzle 320 is 10–15°. By optimizing the size and angle of the nozzle 320, the amount of cleaning liquid used can be better controlled while ensuring the cleaning effect, thus improving resource utilization efficiency.

[0061] Furthermore, in this embodiment of the present invention, the controller is also configured to control the lifting drive 33 to drive the outer sleeve 32 to rise and start reverse flushing after the rinsing is completed, so as to remove the residual material in the nozzle 320. The pressure of reverse flushing can be optionally set to 1 to 2 MPa.

Claims

1. A self-cleaning reactor, characterized in that, The self-cleaning reactor includes: The vessel body (1); The stirring device has a stirring shaft (2) rotatably disposed in the vessel body (1), and a liquid inlet (21) for holding cleaning liquid is formed on the stirring shaft (2), and a liquid outlet (23) is provided on the wall of the liquid inlet (21). The sleeve lifting assembly (3) is movably sleeved on the outside of the stirring shaft (2) and has a liquid outlet passage (310) communicating with the liquid outlet (23). The sleeve lifting assembly (3) is provided with a nozzle (320) communicating with the liquid outlet passage (310). The sleeve lifting assembly (3) is designed to automatically lift and lower in response to changes in the liquid level inside the vessel (1) so that the nozzle (320) is aligned with the residual material on the inner wall of the vessel (1).

2. The self-cleaning reactor according to claim 1, characterized in that, The stirring shaft (2) is hollow to form the infusion chamber (21), and the stirring shaft (2) is provided with an inlet (22) and an outlet (23) from top to bottom. The self-cleaning reactor also includes an infusion assembly (4), which includes an infusion tube (41) and an infusion actuator (42). The infusion actuator (42) is located outside the reactor body (1), and the infusion tube (41) connects the infusion actuator (42) and the inlet (22).

3. The self-cleaning reactor according to claim 2, characterized in that, The sleeve lifting assembly (3) includes an inner sleeve (31) and an outer sleeve (32) sequentially sleeved from the inside to the outside. The inner sleeve (31) is fixedly sleeved on the stirring shaft (2) corresponding to the liquid outlet (23). The liquid outlet passage (310) is opened on the inner sleeve (31), and the nozzle (320) is opened on the outer sleeve (32). The outer sleeve (32) is designed to automatically lift and lower in response to changes in the liquid level inside the vessel body (1).

4. The self-cleaning reactor according to claim 3, characterized in that, A sliding pair is provided between the inner sleeve (31) and the outer sleeve (32), and the outer sleeve (32) can be raised and lowered along the sliding pair.

5. The self-cleaning reactor according to claim 3, characterized in that, The sleeve lifting assembly (3) also includes a level gauge (34) and a lifting drive (33). The level gauge (34) is installed on the outer sleeve (32) and is used to detect the liquid level in the vessel body (1) in real time. The lifting drive (33) is communicatively connected to the level gauge (34) and is used to drive the outer sleeve (32) to move along the stirring shaft (2) according to the detection result of the level gauge (34).

6. The self-cleaning reactor according to claim 5, characterized in that, The bottom end of the outer tube (32) is provided with a permanent magnet, and the lifting drive (33) is a magnetic coupling motor. The magnetic coupling motor is located at the bottom of the vessel body (1) and is used to drive the permanent magnet to lift the outer tube (32).

7. The self-cleaning reactor according to claim 3, characterized in that, Both ends of the outer sleeve (32) are provided with sealing components (5), and the sealing components (5) are sealed and fitted to the outer wall of the inner sleeve (31).

8. The self-cleaning reactor according to claim 7, characterized in that, The sealing assembly (5) includes a sealing ring and a bellows. The bellows is sleeved on the inner sleeve (31) and connected to the outer sleeve (32). The sealing ring is provided on the inner side of the bellows and is sealed and fitted to the outer wall of the inner sleeve (31).

9. The self-cleaning reactor according to claim 3, characterized in that, The infusion tube (41) is connected to the inlet (22) at one end with a feed sleeve (44). The feed sleeve (44) allows the stirring shaft (2) to rotatably pass through it, and the feed sleeve (44) and the stirring shaft (2) enclose and form an inlet channel connecting the infusion tube (41) and the inlet (22). And / or, the infusion assembly (4) further includes a pressure gauge (43) and a controller. The pressure gauge (43) is used to detect the pressure in the infusion tube (41). The controller is communicatively connected to the pressure gauge (43) and the infusion driver (42) respectively, and is used to adjust the output flow of the infusion driver (42) according to a preset pressure.

10. The self-cleaning reactor according to any one of claims 1 to 9, characterized in that, The nozzle (320) extends along the axial direction of the stirring shaft (2), the width of the nozzle (320) is set to 1-3 mm, and the length of the nozzle (320) is set to 5-8 cm. And / or, the nozzle (320) is arranged to taper outward along the radial direction of the stirring shaft (2); And / or, the included angle formed by the extension lines of the two side walls of the nozzle (320) is 10 to 15°.

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