Reaction kettle

Abstract

The utility model relates to a reaction kettle which comprises a kettle body and a driving mechanism arranged on the kettle body, a guide cylinder and a stirrer linked with the driving mechanism are arranged in the kettle body, a plurality of transverse baffle rings are arranged on the inner circumferential wall of the guide cylinder, and a plurality of openings positioned on the lower side of each transverse baffle ring are formed in the circumferential wall of the guide cylinder. An annular frame linked with the driving mechanism is further rotatably arranged on the peripheral wall of the flow guide cylinder, a plurality of arc-shaped plates capable of covering the openings are arranged on the annular frame, the number of the arc-shaped plates corresponds to that of the openings, and when the annular frame rotates, the arc-shaped plates alternately open or close the openings, so that the flow in the flow guide cylinder flows from top to bottom under the action of the stirrer, and the flow in the flow guide cylinder is uniform. The flowing sectional area of the fluid at each transverse baffle ring is shrunk and expanded, so that the fluid is accelerated and then decelerated, and multi-stage shearing and turbulent flow are generated; meanwhile, the opening circulation on the guide cylinder is opened and closed, so that the dynamic change of the flow field structure between multi-stage shunting circulation and single bottom return is realized, and the mixing efficiency of the reaction kettle is improved.

Description

Technical Field

[0001] This utility model relates to the field of chemical production equipment technology, specifically to a reaction vessel. Background Technology

[0002] In the chemical industry, reaction vessels are core equipment for processes such as mixing, reaction, crystallization, and dispersion. Flame retardants are special chemical additives used to improve the combustion performance of flammable materials. They are widely used in the flame-retardant processing of various decorative materials, effectively preventing, delaying, or terminating the spread of flames, thereby achieving a flame-retardant effect. In the processing of flame retardants, stirred reaction vessels are typically used. Processing is achieved through mixing and stirring within the reaction vessel. The stirring system, as a key component of the reaction vessel, directly determines the performance of the reactants.

[0003] The patent document with patent publication number "CN216704357U" discloses a reaction vessel for the production of flame retardants. It uses a guide block that can move up and down between two sets of stirring blades to turn the material up and down. However, although the open trumpet-shaped design and the flow divider can produce a certain mixing effect, and although the flow divider can divide the fluid into two streams, its flow field structure is still relatively simple and it is difficult to provide enough shear force to achieve uniform dispersion. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a reaction vessel, which uses multiple transverse baffles set on the inner circumferential wall of the guide tube to cause the flow of material to contract and expand at each transverse baffle at the flow cross-sectional area of ​​the fluid during the flow from top to bottom in the guide tube under the action of the agitator. This causes the fluid to accelerate and then decelerate, generating multi-stage shear and turbulence. At the same time, the opening and closing of the opening circulation on the guide tube realizes the dynamic change of the flow field structure between multi-stage split circulation and single bottom reversal, thereby improving the mixing efficiency of the reaction vessel.

[0005] This utility model provides a reaction vessel to solve the above-mentioned technical problems, including a vessel body and a driving mechanism disposed on the vessel body. The vessel body is provided with a feed inlet and a liquid inlet pipe, and the bottom of the vessel body is provided with a discharge outlet. The vessel body is provided with a guide cylinder and a stirrer linked with the driving mechanism. The guide cylinder is arranged around the stirrer. The inner peripheral wall of the guide cylinder is provided with multiple transverse baffles. The peripheral wall of the guide cylinder is provided with multiple openings located below each of the transverse baffles. The peripheral wall of the guide cylinder is also rotatably provided with a ring frame linked with the driving mechanism. The ring frame is provided with multiple arc-shaped plates that can cover the openings. The number of arc-shaped plates corresponds to the number of openings. When the ring frame rotates, the arc-shaped plates alternately open or close the openings.

[0006] Furthermore, the driving mechanism includes a drive motor, the output end of which extends into the vessel body and connects to the stirring shaft of the stirrer. The output end of the drive motor is also provided with a drive gear. The upper end of the ring frame is provided with a connecting ring, which is rotatably mounted on the top of the vessel body. The outer peripheral wall of the connecting ring is provided with an external toothed ring, which meshes with a transmission gear. The transmission gear is fixed on a transmission shaft, and the top of the transmission shaft is fixed to a transmission gear disk, which meshes with the drive gear.

[0007] Furthermore, the inner diameter of the transverse retaining ring varies.

[0008] Furthermore, the inner diameter of the transverse retaining ring increases sequentially from top to bottom.

[0009] Furthermore, the inner diameter of the transverse retaining ring is provided with teeth.

[0010] Furthermore, a jacket is provided on the outer wall of the vessel, and the jacket is provided with an inlet and an outlet.

[0011] Furthermore, the outer side of the ring frame is provided with protruding ribs.

[0012] Furthermore, valves are provided on the feed inlet, liquid inlet pipe, and discharge outlet.

[0013] The beneficial effects of using this utility model are as follows:

[0014] The guide tube is arranged around the agitator, and multiple transverse baffles are provided on the inner circumferential wall of the guide tube. When the agitator rotates, the material forms a downward axial flow inside the guide tube. When it flows through each transverse baffle, the flow cross-sectional area decreases rapidly and the flow velocity increases sharply. Then the flow cross-sectional area increases rapidly again and the flow velocity slows down, forming multi-stage shear and turbulence, which enhances material mixing and mass transfer.

[0015] The opening on the guide tube provides a lateral overflow channel for this stage. After undergoing enhanced shearing in this stage, some of the fluid flows out of the guide tube laterally through the opening and enters the external circulation area. After mixing with the external fluid, it flows back upward. The remaining fluid continues to flow downward in the guide tube to the next stage, repeating the enhanced-diversion process to improve mixing efficiency.

[0016] The openings are closed or opened by arc-shaped plates on the ring frame. When the openings are open, the fluid undergoes multi-stage lateral flow splitting, mixing with the material in the area between the outside of the feed cylinder and the vessel body before flowing upwards, forming multiple circulation loops at different heights. When the arc-shaped plates close the openings, the fluid flows from top to bottom within the feed cylinder, then is forcibly turned back at the bottom, forming a single large circulation loop. The periodic opening and closing of the openings during the circumferential rotation of the ring frame allows for dynamic switching between multi-stage lateral flow splitting and forced bottom reversal, helping to break down potential local dead zones in steady-state flow and improve mixing efficiency.

[0017] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 for Figure 1 A magnified view of the details of A.

[0020] In the attached diagram: 100-vessel body, 110-feed inlet, 120-liquid inlet pipe, 130-discharge outlet, 200-drive mechanism, 210-drive motor, 220-drive gear, 230-transmission gear disc, 240-drive shaft, 250-transmission gear, 300-stirrer, 400-guide tube, 410-transverse retaining ring, 420-opening, 500-ring frame, 510-arc plate, 520-connecting ring, 530-external gear ring, 600-jacket. Detailed Implementation

[0021] Referring to the accompanying drawings, the specific embodiments of this utility model will be described in detail.

[0022] Reference Figures 1 to 2 This utility model provides an embodiment of a reaction vessel.

[0023] A reaction vessel includes a vessel body 100 and a drive mechanism 200 mounted on the vessel body 100. The vessel body 100 is provided with a feed inlet 110 and a liquid inlet pipe 120, and a discharge outlet 130 is provided at the bottom of the vessel body 100. Further, valves are provided on the feed inlet 110, the liquid inlet pipe 120, and the discharge outlet 130 to control their opening and closing. Further, a temperature sensor, a pressure valve, or a pH monitoring system may be installed on the vessel body 100; these are existing technologies for controlling the internal environment of the reaction vessel and will not be elaborated upon here. Further, a jacket 600 is provided on the outer wall of the vessel body 100, and the jacket 600 has an inlet and an outlet to facilitate temperature control within the vessel body 100.

[0024] The vessel body 100 contains a flow guide cylinder 400 and a stirrer 300 linked to the drive mechanism 200. The flow guide cylinder 400 surrounds the stirrer 300, and multiple transverse baffles 410 are provided on the inner peripheral wall of the flow guide cylinder 400. When the stirrer 300 rotates, the material forms a downward axial flow inside the flow guide cylinder 400. As it flows through each transverse baffle 410, the flow cross-sectional area decreases rapidly, and the flow velocity increases sharply. Then, the flow cross-sectional area increases rapidly again, and the flow velocity decreases, creating multi-stage shearing and turbulence, enhancing material mixing and mass transfer. Furthermore, the inner diameter of the transverse baffles 410 is provided with teeth to improve the shearing efficiency of the fluid passing through the transverse baffles 410. These teeth can be rectangular, triangular, or serrated, and are made of high-strength, corrosion-resistant materials.

[0025] Furthermore, the inner diameters of the transverse baffles 410 vary, allowing for different flow velocities in each layer of fluid, thus improving the mixing effect. Preferably, the inner diameters of the transverse baffles 410 increase sequentially from top to bottom, with the inner diameter of the uppermost transverse baffle 410 being the smallest and the inner diameter of the lower transverse baffle 410 being the largest. When the material initially flows into the guide cylinder from the upper part, the flow velocity is highest, and the turbulence intensity is greater, resulting in initial mixing. Subsequently, as it passes through the lower transverse baffles 410, the flow velocity gradually decreases, allowing for thorough mixing. When flowing through the lowest layer, the material flow velocity is relatively stable, facilitating the smooth entry of the fluid into the bottom of the guide cylinder 400 and its return to the external circulation area between the guide cylinder 400 and the vessel body 100.

[0026] The peripheral wall of the guide tube 400 is provided with multiple openings 420 located on the lower side of each of the transverse baffle rings 410, that is, each level is provided with a transverse overflow channel. After undergoing enhanced shearing at this level, part of the fluid flows out of the guide tube 400 through the openings 420 and enters the circulation area between the vessel body 100 and the guide tube 400, mixes with the external materials and flows back upward. The remaining fluid continues to flow downward into the next level transverse baffle ring 410, repeating the above steps until the remaining fluid flows through the bottom of the guide tube 400 and is forced to turn back, forming a multi-stage transverse diversion.

[0027] The guide tube 400 may also have a rotatable ring frame 500 that is linked to the drive mechanism 200. The ring frame 500 has multiple arc-shaped plates 510 that can cover the opening 420. The number of arc-shaped plates 510 corresponds to the number of openings 420. When the ring frame 500 rotates, the arc-shaped plates 510 alternately open or close the openings 420. Furthermore, the outer side of the ring frame 500 is provided with protrusions (not shown in the figure). The protrusions can be continuous spiral protrusions or multiple protrusions arranged axially. The arrangement of the protrusions improves the mixing effect of the material.

[0028] The opening 420 is closed or opened by the arc-shaped plate 510 on the ring frame 500. When the opening 420 is open, the fluid achieves multi-stage lateral flow splitting, mixing with the material in the area between the outside of the guide cylinder and the vessel body 100 before flowing upward, forming multiple circulation loops at different heights. When the arc-shaped plate 510 closes the opening 420, the fluid flows from top to bottom in the guide cylinder, and then is forced to turn back at the bottom, forming a single large circulation loop. During the circumferential rotation of the ring frame 500, the periodic opening and closing of the opening 420 allows the fluid to dynamically switch between multi-stage lateral flow splitting and forced bottom reversal, which helps to break the local dead zones that may be formed in steady-state flow and improve mixing efficiency.

[0029] In some embodiments, the driving mechanism 200 includes a driving motor 210, the output end of which extends into the vessel body 100 and is connected to the stirring shaft of the stirrer 300. In this case, the driving motor 210 drives the stirrer 300 to rotate at high speed, causing the material to flow axially within the vessel body 100.

[0030] The output end of the drive motor 210 is also provided with a drive gear 220. The upper end of the ring frame 500 is provided with a connecting ring 520. The connecting ring 520 is rotatably mounted on the top of the vessel body 100. The outer peripheral wall of the connecting ring 520 is provided with an external toothed ring 530. The external toothed ring 530 meshes with the transmission gear 250. The transmission gear 250 is fixed on the transmission shaft 240. The top of the transmission shaft 240 is fixed with the transmission gear disk 230. The transmission gear disk 230 meshes with the drive gear 220. At this time, the drive motor 210 drives the drive gear 220 to rotate. The drive gear 220 meshes with the transmission gear disk 230, which drives the transmission shaft 240 to rotate. The transmission gear 250 on the transmission shaft 240 meshes with the external gear ring 530, which drives the external gear ring 530 to rotate, and then drives the ring frame 500 to rotate. This converts the high-speed rotation of the rotary motor into the low-speed rotation of the ring frame 500, ensuring that each opening 420 remains open or closed for a certain period of time, forming a stable periodic flow field switching.

[0031] In use, reactants are injected into the vessel body 100 through the feed inlet 110 and the liquid inlet pipe 120. Under the action of the drive mechanism 200, the stirrer 300 rotates and pushes the material to flow downward in the guide tube 400, passing through the transverse baffles 410 with different inner diameters in each layer in sequence. Each time the material passes through a transverse baffle 410, it is subjected to enhanced shearing. Simultaneously, the ring frame 500 rotates, causing the arc-shaped plate 510 on it to periodically open or close the opening 420. When the opening 420 is open, some material flows laterally out from the opening 420 at each level, entering the external circulation area between the vessel body 100 and the guide cylinder 400. After mixing with the external fluid, it flows upward back to the top of the guide cylinder 400 and then re-enters the guide cylinder 400. When the opening 420 is closed, the material flows from top to bottom in the guide cylinder to the bottom of the vessel body 100 and is forced back into the external circulation area between the outer wall of the guide cylinder 400 and the vessel body 100. Then, it flows upward back from the top of the guide cylinder 400 to the inside of the guide cylinder 400. The rotation of the ring frame 500 causes the opening 420 to open and close alternately, dynamically changing the material in the vessel body 100 between multi-stage diversion circulation and single bottom reversal circulation, thus achieving material mixing. After the reaction is complete, the discharge port 130 at the bottom of the vessel body 100 is opened to discharge the finished product.

[0032] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a 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 specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0033] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A reaction vessel, characterized in that, It includes a vessel body (100) and a drive mechanism (200) disposed on the vessel body (100). The vessel body (100) is provided with a feed inlet (110) and a liquid inlet pipe (120). The bottom of the vessel body (100) is provided with a discharge outlet (130). The vessel body (100) is provided with a flow guide cylinder (400) and a stirrer (300) that is linked to the drive mechanism (200). The flow guide cylinder (400) is arranged around the stirrer (300). The inner peripheral wall of the flow guide cylinder (400) is provided with a plurality of transverse baffles (410). The peripheral wall of the flow guide cylinder (400) is provided with a plurality of openings (420) located on the lower side of each transverse baffle (410). The outer peripheral wall of the guide tube (400) is provided with a ring frame (500) that is linked to the drive mechanism (200). The ring frame (500) is provided with a plurality of arc-shaped plates (510) that can cover the opening (420). The number of arc-shaped plates (510) corresponds to the number of openings (420). When the ring frame (500) rotates, the arc-shaped plates (510) alternately open or close the openings (420).

2. The reaction vessel according to claim 1, characterized in that, The drive mechanism (200) includes a drive motor (210), the output end of which extends into the vessel body (100) and is connected to the stirring shaft of the stirrer (300). The output end of the drive motor (210) is also provided with a drive gear (220). The upper end of the ring frame (500) is provided with a connecting ring (520), which is rotatably mounted on the top of the vessel body (100). The outer peripheral wall of the connecting ring (520) is provided with an external toothed ring (530), which meshes with a transmission gear (250). The transmission gear (250) is fixed on a transmission shaft (240), and the top of the transmission shaft (240) is fixed with a transmission gear disc (230). The transmission gear disc (230) meshes with the drive gear (220).

3. The reaction vessel according to claim 1, characterized in that, The inner diameter of the transverse retaining ring (410) varies.

4. The reaction vessel according to claim 1, characterized in that, The inner diameter of the transverse retaining ring (410) increases sequentially from top to bottom.

5. The reaction vessel according to claim 1, characterized in that, The transverse retaining ring (410) has teeth on its inner diameter.

6. The reaction vessel according to claim 1, characterized in that, The outer wall of the vessel body (100) is provided with a jacket (600), and the jacket (600) is provided with an inlet and an outlet.

7. The reaction vessel according to claim 1, characterized in that, The outer side of the ring frame (500) is provided with protruding ribs.

8. The reaction vessel according to claim 1, characterized in that, Valves are provided on the feed inlet (110), liquid inlet pipe (120) and discharge outlet (130).

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