Low-pressure large-volume overlapping half-pipe reaction kettle

Abstract

The utility model belongs to chemical machinery and equipment technical field relates to a kind of low pressure large-capacity overlapping half-pipe reaction kettle, including cylinder, lower end of the cylinder is welded with lower head, upper end of cylinder is welded with upper head;The top surface of the upper head installs drive assembly;The drive assembly drives the built-in stirring assembly of cylinder, and stirring assembly includes stirring shaft, and the lower end of stirring shaft is sequentially installed bottom bearing, bottom stirrer, flat paddle from bottom to top, wherein bottom stirrer is located in lower head, and flat paddle is provided with multiple layers along the axial direction of stirring shaft;Cylinder outer surface is welded with the cylinder half-pipe of helically arranged, and cooling cavity is formed between cylinder half-pipe and cylinder surface, and the upper end of cylinder half-pipe is provided with first cooling water outlet, and the lower side of first cooling water outlet is provided with first cooling water inlet.The reaction kettle is high in heat transfer efficiency, and can meet the requirement of fast and uniform temperature change of material in the reaction kettle.

Description

Technical Field

[0001] This utility model belongs to the technical field of chemical machinery and equipment, and relates to a low-pressure, large-capacity overlapping semi-tube reactor. Background Technology

[0002] In industries such as petrochemicals, pharmaceuticals, and food, reaction vessels are key equipment for chemical reactions, material mixing, heating, and cooling. With the continuous expansion of production scale and increasingly stringent process requirements, higher demands are being placed on the performance of reaction vessels. However, existing reaction vessels suffer from low heat transfer efficiency, making it difficult to meet the requirements for rapid and uniform temperature changes within the vessel. When heating or cooling is necessary, the limited heat transfer area and slow heat transfer rate lead to prolonged reaction times and low production efficiency. Summary of the Invention

[0003] To address the aforementioned problems, this invention provides a low-pressure, large-volume overlapping semi-tube reactor. This reactor has high heat transfer efficiency and can meet the requirements for rapid and uniform temperature changes of the materials inside the reactor.

[0004] According to the technical solution of this utility model: a low-pressure, large-capacity, overlapping semi-tube reactor includes a cylindrical body, a lower end cap welded to the lower end of the cylindrical body, and an upper end cap welded to the upper end of the cylindrical body; characterized in that: a driving assembly is installed on the top surface of the upper end cap;

[0005] The drive assembly drives the stirring assembly built into the cylinder. The stirring assembly includes a stirring shaft. From bottom to top, a bottom bearing, a bottom stirrer, and a flat paddle are installed on the lower end of the stirring shaft. The bottom stirrer is located inside the lower end cap, and the flat paddle has multiple layers along the axial direction of the stirring shaft.

[0006] A spirally arranged cylindrical half-pipe is welded to the outer surface of the cylinder, forming a cooling chamber between the cylindrical half-pipe and the cylinder surface. A first cooling water outlet is provided at the upper end of the cylindrical half-pipe, and a first cooling water inlet is provided below the first cooling water outlet.

[0007] A discharge port is provided at the center of the lower end cap. A half-pipe is provided on the lower end cap and around the discharge port. A second cooling water inlet is provided on the half-pipe. A second cooling water outlet is welded above the second cooling water inlet and on the cylinder.

[0008] As a further improvement of this utility model, the drive assembly includes a frame, on which a reducer is mounted, a variable frequency motor is mounted at the input end of the reducer, and the connecting shaft at the output end of the reducer is connected to the stirring shaft.

[0009] As a further improvement of this utility model, the stirring shaft includes an upper stirring shaft and a lower stirring shaft, the upper stirring shaft and the lower stirring shaft are coaxially connected, wherein the upper stirring shaft is coaxially connected to the connecting shaft, and the bottom bearing, the bottom stirrer and the flat paddle are installed on the lower stirring shaft.

[0010] As a further improvement of this utility model, the multi-layer flat paddles are arranged at equal intervals.

[0011] As a further improvement of this utility model, four lugs are welded to the outer surface of the cylinder.

[0012] As a further improvement of this utility model, a first thermometer port is welded counterclockwise to the first cooling water outlet, a second thermometer port is welded below the first thermometer port, a third thermometer port is welded below the second thermometer port, a fourth thermometer port is welded below the third thermometer port, and the fourth thermometer port is welded to the lower end cap.

[0013] As a further improvement of this utility model, a material inlet, a spare port, and a sampling port are welded to the lower end in a clockwise direction.

[0014] As a further improvement of this utility model, the upper end cap is welded clockwise with a pure water port, a vacuum port, a compressed air inlet, a steam inlet, a first pressure gauge port, a first spare port, a manhole, a second spare port, a nitrogen port, a third spare port, a manual vent port, a safety valve port, a fourth spare port, a second pressure gauge port, a feed port, a terminator inlet, a third pressure gauge port, and a fifth spare port.

[0015] As a further improvement of this utility model, the cylindrical half-tube includes overlapping tubes.

[0016] The technical advantages of this invention are as follows: This low-pressure, large-capacity overlapping semi-tube reactor has the advantages of rapid heating and uniform heating. The overlapping semi-tube reactor enables more efficient heat transfer to the reactants, resulting in a more uniform temperature distribution during the reaction process, which is beneficial to improving reaction efficiency and product quality. The semi-circular tube jacket design reduces the thickness of the reactor wall, and the overlapping arrangement strengthens the cylinder, improving the reactor's strength, enhancing structural stability, and reducing production costs. This invention solves the problems of low heat transfer efficiency and uneven material mixing in existing stirred reactors, which reduce the reactor's working efficiency and product quality. This invention, through spiral overlapping welding of semi-tubes on the cylinder and lower end cap, constructs a dense heat transfer surface on the outside of the reactor, enabling rapid heating and cooling of the materials. The materials are stirred under the action of multiple layers of agitators, resulting in more uniform mixing and thus improving the working efficiency of the stirred reactor. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the main structure of this utility model.

[0018] Figure 2 This is a top view of the structure of this utility model.

[0019] Figure 3This is an enlarged schematic diagram of the half-tube of this utility model. Detailed Implementation

[0020] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings.

[0021] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. The described embodiments are merely some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0022] Figure 1-3 The structure includes: 1-lower head; 2-cylinder; 3-upper head; 4-frame; 5-reducer; 6-variable frequency motor; 7-connecting shaft; 8-upper stirring shaft; 9-lower stirring shaft; 10-bottom bearing; 11-bottom agitator; 12-flat impeller; 13-ear seat; 14-overlapping half-pipe of cylinder; 15-first cooling water outlet; 16-first cooling water inlet; 17-first thermometer port; 18-second thermometer port; 19-third thermometer port; 20-fourth thermometer port; 21-discharge port; 22-overlapping half-pipe of head; 23-second cooling water inlet; 2 4-Second cooling water outlet; 25-Material inlet; 26-Spare port; 27-Sampling port; 28-Pure water inlet; 29-Vacuum port; 30-Compressed air inlet; 31-Steam inlet; 32-First pressure gauge port; 33-First spare port; 34-Manhole; 35-Second spare port; 36-Nitrogen port; 37-Third spare port; 38-Manual vent port; 39-Safety valve port; 40-Fourth spare port; 41-Second pressure gauge port; 42-Feed inlet; 43-Terminator inlet; 44-Third pressure gauge port; 45-Fifth spare port, etc.

[0023] like Figure 1-3 As shown, this utility model is a low-pressure, large-capacity, overlapping semi-tube reactor, including a cylindrical body 2, a lower end cap 1 welded to the lower end of the cylindrical body 2, and an upper end cap 3 welded to the upper end of the cylindrical body 2; a drive assembly is installed on the top surface of the upper end cap 3.

[0024] The drive assembly drives the stirring assembly built into the cylinder. The stirring assembly includes a stirring shaft. From bottom to top, the bottom bearing 10, bottom stirrer 11, and flat paddle 12 are installed on the lower end of the stirring shaft. The bottom stirrer 11 is located inside the lower head 1, and the flat paddle 12 has multiple layers along the axial direction of the stirring shaft.

[0025] A spirally arranged cylindrical half-pipe 14 is welded to the outer surface of the cylindrical body 2, forming a cooling chamber between the cylindrical half-pipe 14 and the surface of the cylindrical body 2. A first cooling water outlet 15 is provided at the upper end of the cylindrical half-pipe 14, and a first cooling water inlet 16 is provided below the first cooling water outlet 15. A complete cooling circuit is formed between the first cooling water outlet 15, the first cooling water inlet 16, and the cooling chamber.

[0026] A discharge port 21 is provided at the center of the lower head 1. A head half-pipe 22 is provided on the lower head 1 and around the discharge port 21. A second cooling water inlet 23 is provided on the head half-pipe 22. A second cooling water outlet 24 is welded above the second cooling water inlet 23 and onto the cylinder 2. The second cooling water inlet 23 and the second cooling water outlet 24 are connected through the head half-pipe 22 to form a complete cooling circuit. The cylinder half-pipe 14 includes overlapping tubes. Figure 3 As shown, specifically, the lowest layer of the cylindrical half-pipe 14 is a semi-circular tube, with spiral tubes stacked sequentially above it, and the ends of each layer connected. This arrangement of the cylindrical half-pipe 14 effectively cools the cylinder 2. Compared to a jacketed cooling structure, the cylindrical half-pipe 14 forms a dense heat transfer surface outside the reactor, enabling rapid heating and cooling of the material and allowing for a thinner cylinder wall. The head half-pipe 22 is a spirally arranged half-pipe on the head to form a cooling pipe structure.

[0027] The drive assembly includes a frame 4, on which a reducer 5 is mounted. A variable frequency motor 6 is mounted at the input end of the reducer 5, and the connecting shaft 7 at the output end of the reducer 5 is connected to the stirring shaft.

[0028] The stirring shaft includes an upper stirring shaft 8 and a lower stirring shaft 9, which are coaxially connected. The upper stirring shaft 8 is also coaxially connected to a connecting shaft 7. The bottom bearing 10, the bottom agitator 11, and the flat impeller 12 are mounted on the lower stirring shaft 9. It is understood that in practice, the upper stirring shaft 8 and the lower stirring shaft 9 are fixedly connected using couplings and bolts; the upper stirring shaft 8 and the connecting shaft 7 are also fixedly connected using couplings.

[0029] The multi-layered flat paddles are evenly spaced to achieve uniform mixing.

[0030] Four lugs 13 are welded to the outer surface of the cylinder 2, which allows the product of this utility model to be moved easily.

[0031] The first cooling water outlet 15 is welded counterclockwise to the first thermometer port 17, the second thermometer port 18 is welded below the first thermometer port 17, the third thermometer port 19 is welded below the second thermometer port 18, the fourth thermometer port 20 is welded below the third thermometer port 19, and the fourth thermometer port 20 is welded onto the lower end cap 1.

[0032] The lower end cap 1 is welded with a material inlet 25, a spare port 26, and a sampling port 27 in a clockwise direction.

[0033] The upper end cap 3 is welded clockwise with the following ports: pure water port 28, vacuum port 29, compressed air inlet 30, steam inlet 31, first pressure gauge port 32, first spare port 33, manhole 34, second spare port 35, nitrogen port 36, third spare port 37, manual vent port 38, safety valve port 39, fourth spare port 40, second pressure gauge port 41, feed port 42, terminator inlet 43, third pressure gauge port 44, and fifth spare port 45.

[0034] like Figure 1-3 As shown, this invention, by evenly distributing four layers of flat paddles 12 on the stirring shaft, enables uniform mixing of materials during operation, improving the working efficiency of the stirred tank and ensuring high heat transfer efficiency, thereby enhancing both the working efficiency of the stirred tank and the product quality. Simultaneously, by constructing a dense heat transfer surface on the outer surface of the reactor using the end cap half-pipe 22 and the cylindrical half-pipe 14, rapid heating and cooling of the materials can be achieved.

[0035] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although this utility model has been described in detail with reference to examples, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A low-pressure, large-volume overlapping semi-tube reactor, comprising a cylindrical body (2), wherein a lower end cap (1) is welded to the lower end of the cylindrical body (2), and an upper end cap (3) is welded to the upper end of the cylindrical body (2); characterized in that: The drive assembly is mounted on the top surface of the upper end cap (3); The drive assembly drives the stirring assembly built into the cylinder. The stirring assembly includes a stirring shaft. The bottom end of the stirring shaft is installed with a bottom bearing (10), a bottom stirrer (11), and a flat paddle (12) from bottom to top. The bottom stirrer (11) is located inside the lower head (1), and the flat paddle (12) has multiple layers along the axial direction of the stirring shaft. The outer surface of the cylinder (2) is welded with a spirally arranged cylinder half-pipe (14), and a cooling chamber is formed between the cylinder half-pipe (14) and the surface of the cylinder (2). A first cooling water outlet (15) is provided at the upper end of the cylinder half-pipe (14), and a first cooling water inlet (16) is provided below the first cooling water outlet (15). A discharge port (21) is provided at the center of the lower end cap (1). A head half pipe (22) is provided on the lower end cap (1) and around the discharge port (21). A second cooling water inlet (23) is provided on the head half pipe (22). A second cooling water outlet (24) is welded above the second cooling water inlet (23) and on the cylinder (2).

2. The low-pressure, large-volume overlapping semi-tube reactor as described in claim 1, characterized in that: The drive assembly includes a frame (4), on which a reducer (5) is mounted. A variable frequency motor (6) is mounted at the input end of the reducer (5), and the connecting shaft (7) at the output end of the reducer (5) is connected to the stirring shaft.

3. The low-pressure, large-volume overlapping semi-tube reactor as described in claim 1 or 2, characterized in that: The stirring shaft includes an upper stirring shaft (8) and a lower stirring shaft (9). The upper stirring shaft (8) and the lower stirring shaft (9) are coaxially connected. The upper stirring shaft (8) is coaxially connected with the connecting shaft (7). The bottom bearing (10), the bottom agitator (11), and the flat paddle (12) are installed on the lower stirring shaft (9).

4. The low-pressure, large-volume overlapping semi-tube reactor as described in claim 1, characterized in that: Multi-layer flat paddles (12) are set at equal intervals.

5. The low-pressure, large-volume overlapping semi-tube reactor as described in claim 1, characterized in that: Four lugs (13) are welded to the outer surface of the cylinder (2).

6. The low-pressure, large-volume overlapping semi-tube reactor as described in claim 1, characterized in that: The first cooling water outlet (15) is welded counterclockwise with the first thermometer port (17), the second thermometer port (18) is welded below the first thermometer port (17), the third thermometer port (19) is welded below the second thermometer port (18), the fourth thermometer port (20) is welded below the third thermometer port (19), and the fourth thermometer port (20) is welded on the lower end cap (1).

7. The low-pressure, large-volume overlapping semi-tube reactor as described in claim 1, characterized in that: The lower end cap (1) is welded with a material inlet (25), a spare port (26), and a sampling port (27) in a clockwise direction.

8. The low-pressure, large-volume overlapping semi-tube reactor as described in claim 1, characterized in that: The upper end cap (3) is welded clockwise with a pure water port (28), a vacuum port (29), a compressed air inlet (30), a steam inlet (31), a first pressure gauge port (32), a first spare port (33), a manhole (34), a second spare port (35), a nitrogen port (36), a third spare port (37), a manual vent port (38), a safety valve port (39), a fourth spare port (40), a second pressure gauge port (41), a feed port (42), a stop agent inlet (43), a third pressure gauge port (44), and a fifth spare port (45).

9. The low-pressure, large-volume overlapping semi-tube reactor as described in claim 1, characterized in that: The cylindrical half-tube (14) comprises overlapping tubes.

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