Automatic cleaning device for inner wall of chemical reaction kettle

Abstract

The utility model discloses an automatic cleaning device for the inner wall of a chemical reaction kettle, which belongs to the technical field of reaction kettle cleaning equipment and comprises a water distribution ring, a plurality of support rods, an indentation component and a pulse jet component, and the indentation component is arranged at the far end of each support rod and can rotate along with the support rods to press hard scale on the inner wall of the reaction kettle into two parallel break marks; the pulse jet flow assembly comprises a high-pressure spray head which is installed at the far end of the supporting rod and connected with the water distribution ring through a guide pipe, the high-pressure spray head is installed downwards in an inclined mode and faces the upper-layer break mark, and a swing baffle structure is installed on the high-pressure spray head so that the high-pressure spray head can form pulse jet flow in the spraying process. According to the automatic cleaning device for the inner wall of the chemical reaction kettle, a breaking mark is pressed on the surface of the scale in advance, the overall structure of the scale is damaged, and the high-pressure spray head obliquely impacts the pressing mark, so that water flow impact force generates component force parallel to the inner wall of the reaction kettle, the component force can effectively prize the scale from the inner wall of the reaction kettle, and therefore the scale is stripped.

Description

Technical Field

[0001] This utility model belongs to the technical field of reactor cleaning equipment, and in particular relates to an automatic cleaning device for the inner wall of a chemical reactor. Background Technology

[0002] As a key container for the reaction and preparation of chemical products, chemical reaction vessels inevitably accumulate residues on their inner walls after prolonged operation, forming scale or deposits. The presence of these residues has various adverse effects on the reaction vessel, such as affecting the efficiency of chemical reactions, reducing product quality, increasing energy consumption, and shortening equipment lifespan. Therefore, regular cleaning of the reaction vessel is an important measure to ensure normal production operation and long-term stable equipment operation.

[0003] Traditional manual handheld spray gun cleaning, while flexible in operation, is extremely inefficient and physically demanding, making it unsuitable for large-scale production environments. Furthermore, manual cleaning struggles to ensure uniformity and thoroughness, often leaving cleaning dead zones.

[0004] The patent with authorization announcement CN214160792U discloses an automatic cleaning device for chemical reactors. Although the cleaning device improves the cleaning efficiency to a certain extent, it is not ideal for hard and thick scale layers. The scale layer often has a strong adhesion to the inner wall of the reactor. This adhesion makes it difficult for the scale layer to be washed off by water flow even when high-pressure water jet is used.

[0005] To address this issue, we propose an automatic cleaning device for the inner wall of a chemical reactor. Utility Model Content

[0006] The purpose of this invention is to solve the problem of the difficulty in removing the thick scale layer on the inner wall of a chemical reactor in the prior art, and to propose an automatic cleaning device for the inner wall of a chemical reactor.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] An automatic cleaning device for the inner wall of a chemical reactor includes a motor mounted on the reactor, the output end of which passes through the reactor and is fixedly connected to a drive shaft, and further includes:

[0009] The water distribution ring is slidably sleeved on the drive shaft;

[0010] Multiple struts are equidistantly distributed around the outer periphery of the water distribution ring;

[0011] The indentation assembly, located at the far end of the strut, can press two parallel fracture marks into the hard scale on the inner wall of the reactor as the strut rotates.

[0012] The pulse jet assembly includes a high-pressure nozzle mounted at the distal end of a strut and connected to a water distribution ring via a conduit. The high-pressure nozzle is mounted at an angle downward toward the upper fracture and is equipped with a swing baffle structure to form a pulse jet during the spraying process.

[0013] Preferably, the water distribution ring includes an outer ring body and a cover that is rotatably and sealingly connected to the outer ring body, the cover being connected to the water inlet pipe.

[0014] Preferably, the strut comprises two rods hinged at both ends, and a support spring is provided between the two rods.

[0015] Preferably, the indentation assembly includes two mounting discs rotatably disposed at the distal end of the support rod, a shaft fixedly disposed between the two mounting discs, and two parallel indentation wheels rotatably disposed on the shaft.

[0016] Preferably, the shaft is inclined to the axis of the mounting plate.

[0017] Preferably, the cross-section of the drive shaft is non-circular.

[0018] Preferably, the swing baffle structure includes a mounting frame rotatably mounted on the high-pressure nozzle, a torsion spring is provided at the pivot position of the mounting frame, a water baffle is provided on the side of the mounting frame near the output end of the high-pressure nozzle, and a counterweight and a limiting plate are provided at the other end of the mounting frame. When the limiting plate contacts the high-pressure nozzle, the water baffle is located in front of the output end of the high-pressure nozzle.

[0019] In summary, the technical effects and advantages of this utility model are as follows: The thick scale on the inner wall of the reactor is often dense in structure and has strong adhesion to the inner wall, making it difficult to remove effectively by directly using high-pressure water jet impact. This utility model pre-presses indentations on the scale surface, destroying the overall structure of the scale, reducing its mechanical strength, and making it easier to be broken by high-pressure water jet impact. At the same time, stress concentration is formed at the indentation, and when high-pressure water jet impacts, the stress will extend along the indentation direction, causing the scale to peel off from the inner wall of the reactor, significantly improving cleaning efficiency.

[0020] In vertical spraying, the water flow impact force is mainly concentrated on the scale surface, making it difficult to effectively penetrate to the interface between the scale and the inner wall of the reactor. This invention uses a high-pressure nozzle with an inclined impact indentation method, so that the water flow impact force generates a component force parallel to the inner wall of the reactor. This component force can effectively "pry up" the scale from the inner wall of the reactor, thereby achieving scale removal. Inclined spraying can also avoid the water flow directly impacting the inner wall of the reactor, reducing damage to the inner wall of the reactor.

[0021] Continuous spraying results in a relatively stable water flow impact force, making it difficult to effectively remove stubborn scale. This invention addresses this by incorporating a swing baffle structure, which enables the high-pressure nozzle to generate a pulse jet during spraying. The pulse jet is characterized by its large instantaneous impact force and short duration, resulting in a stronger impact and shearing effect on the scale, making it easier to break up and peel off from the inner wall of the reactor. The pulse jet can also generate a cavitation effect, forming tiny bubbles in the water flow. The shock waves generated when these bubbles burst can further destroy the scale, improving the cleaning effect. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the position and structure of the present invention within the reaction vessel;

[0023] Figure 2 This is a schematic diagram of the overall structure of this utility model;

[0024] Figure 3 This is a cross-sectional structural schematic diagram of the water distribution ring of this utility model;

[0025] Figure 4 This is a front view structural diagram of the present invention;

[0026] Figure 5 for Figure 4 A magnified structural diagram of part A in the middle;

[0027] Figure 6 This is a schematic diagram of the indentation assembly and pulse jet assembly in this utility model.

[0028] In the diagram: 1. Reactor; 2. Motor; 21. Drive shaft; 3. Water distribution ring; 31. Outer ring body; 32. Cover; 33. Water inlet pipe; 4. Support rod; 41. Rod body; 42. Support spring; 5. Indentation assembly; 51. Mounting plate; 52. Shaft body; 53. Indentation wheel; 6. Pulse jet assembly; 61. High-pressure nozzle; 62. Mounting frame; 63. Water baffle; 64. Counterweight; 65. Torsion spring; 66. Limiting plate. Detailed Implementation

[0029] Reference Figure 1-4 An automatic cleaning device for the inner wall of a chemical reactor includes a motor 2 installed on the reactor 1, the output end of the motor 2 passing through the reactor 1 and fixedly connected to a drive shaft 21, and also includes a water distribution ring 3, an indentation assembly 5, a pulse jet assembly 6 and multiple support rods 4.

[0030] Reference Figure 1-4The water distribution ring 3 is slidably sleeved on the drive shaft 21. The cross-section of the drive shaft 21 is not circular. In this embodiment, the cross-section of the drive shaft 21 is a regular hexagon. The inner cross-section of the water distribution ring 3 is adapted to the cross-section of the drive shaft 21, so that the water distribution ring 3 can slide axially on the drive shaft 21 but cannot rotate circumferentially. The water distribution ring 3 includes an outer ring body 31 and a cover 32 that is rotatably and sealingly connected to the outer ring body 31. The cover 32 is connected to the water inlet pipe 33, and a water supply space is formed between the outer ring body 31 and the cover 32. The water inlet pipe 33 is connected to an external water supply device, and the water flows into the water supply space and is output to each pulse jet component 6. The pulse jet component 6 rotates with the support rod 4 and the outer ring body 31, and its position changes continuously around the drive shaft 21. Since the cover 32 is rotatably connected to the outer ring body 31, the rotation of the outer ring body 31 will not cause the water inlet pipe 33 to become entangled with the rotation of the drive shaft 21, so that the water inlet pipe 33 continuously provides water flow to the water supply space during the rotation of the drive shaft 21.

[0031] The indentation assembly 5 is located at the far end of the support rod 4 and can press out two parallel fracture marks on the hard scale on the inner wall of the reactor 1 as the support rod 4 rotates.

[0032] Reference Figure 1-3 Multiple support rods 4 are equidistantly distributed on the outer periphery of the water distribution ring 3. Each support rod 4 includes two rods 41 with hinged ends. A support spring 42 is provided between the two rods 41. The length of the two rods 41 is greater than the radius of the reactor 1, so there is an included angle between the two rods 41. The support spring 42 causes the indentation assembly 5 on the far end of the rod 41 to abut against the inner wall of the reactor 1. When the drive shaft 21 rotates, the indentation assembly 5 remains abutting against the inner wall of the reactor 1 and rotates synchronously with the drive shaft 21 to make indentations. When contacting uneven parts such as welds on the inner wall of the reactor 1, the extension and retraction of the support spring 42 adapts to the inner wall of the reactor 1.

[0033] Reference Figure 1-5 The indentation assembly 5 includes two mounting discs 51 rotatably mounted at the distal end of the support rod 4. The axis of the mounting discs 51 is parallel to the axis of the drive shaft 21. A shaft 52 is fixedly mounted between the two mounting discs 51. The shaft 52 is inclined to the axis of the mounting discs 51. Two parallel indentation wheels 53 are rotatably mounted on the shaft 52. Under the elastic force of the support spring 42, the indentation wheels 53 press against the inner wall of the reactor 1. The outer edge of the indentation wheel 53 is a knife edge, which can embed into the scale layer on the inner wall of the reactor 1 under the elastic force of the support spring 42. When the drive shaft 21 rotates, the support rod 4 drives the indentation wheels 53 to press out a fracture mark on the scale layer. The scale between the two fracture marks separates from the overall scale layer inside the reactor 1, destroying the overall structure of the scale layer, reducing the mechanical strength of the scale layer, and making it easier to be broken by the impact of high-pressure water flow. At the same time, stress concentration is formed at the fracture mark. When the high-pressure water flow impacts, the stress will extend along the fracture mark direction, causing the scale to peel off from the inner wall of the reactor 1, significantly improving the cleaning efficiency.

[0034] Because the indentation wheel 53 is inclined, during the inclined rolling process of the indentation wheel 53, a downward component force is generated, causing the water distribution ring 3 to move downward along the drive shaft 21 and form a spiral trajectory along the inner wall of the reactor 1 (e.g., Figure 5 (As shown by the dashed line in the middle), the spiral trajectory end faces of multiple indentation wheels 53 overlap, thus covering the entire inner wall of the reactor 1 and achieving comprehensive cleaning.

[0035] Reference Figure 1-6 The pulse jet assembly 6 includes a high-pressure nozzle 61 installed at the far end of the support rod 4 and connected to the water distribution ring 3 via a conduit. The conduit guides the water flow in the water distribution ring 3 to the high-pressure nozzle 61 for high-pressure spraying. The high-pressure nozzle 61 is installed at an angle downwards and towards the upper indentation. The way the high-pressure nozzle 61 impacts the indentation at an angle causes the water flow impact force to generate a component force parallel to the inner wall of the reactor 1. This component force can effectively "pry up" the scale from the inner wall of the reactor 1, thereby achieving the peeling of scale between the two indentations. In addition, the high-pressure nozzle 61 is equipped with a swing baffle structure, so that the high-pressure nozzle 61 forms a pulse jet during the spraying process. The pulse jet has the characteristics of large instantaneous impact force and short action time, which can generate stronger impact and shearing action on the scale, making it easier to break up the scale and peel it off from the inner wall of the reactor 1.

[0036] The oscillating baffle structure includes a mounting frame 62 rotatably mounted on the high-pressure nozzle 61. A torsion spring 65 is located at the pivot point of the mounting frame 62. A baffle plate 63 is located on the side of the mounting frame 62 near the output end of the high-pressure nozzle 61. The high-pressure water jet from the high-pressure nozzle 61 acts on the baffle plate 63, causing the mounting frame 62 to deflect, thereby exposing the water jet from the high-pressure nozzle 61. Under the action of the torsion spring 65, the mounting frame 62 and the baffle plate 63 return to their original positions, and the above process is repeated to form a pulsed water flow. To improve the cleaning effect, a counterweight 64 and a limiting plate 66 are provided at the other end of the mounting frame 62. When the limiting plate 66 contacts the high-pressure nozzle 61, the baffle plate 63 is located in front of the output end of the high-pressure nozzle 61. The limiting plate 66 can ensure that the baffle plate 63 is exactly in front of the high-pressure nozzle 61 when the baffle plate 63 is reset. When the mounting frame 62 is deflected, the inertia of the counterweight 64 can ensure that the mounting frame 62 overcomes the elastic force of the torsion spring 65 when it is deflected, so that the baffle plate 63 is fully exposed to the water flow.

[0037] Working principle:

[0038] In use, the inlet pipe 33 is connected to an external water supply device, and water flows into the water supply space and is output to each pulse jet component 6. Under the elastic force of the support spring 42, the indentation wheel 53 is pressed against the inner wall of the reactor 1. The outer edge of the indentation wheel 53 is a knife edge, which can embed into the scale layer on the inner wall of the reactor 1 under the elastic force of the support spring 42. The motor 2 is started, the drive shaft 21 rotates, and the support rod 4 drives the indentation wheel 53 to press out a mark on the scale layer. The guide tube guides the water flow in the water distribution ring 3 to the high-pressure nozzle 61 for high-pressure spraying. The high-pressure nozzle 61 is tilted to impact the indentation, so that the water flow impact force generates a component force parallel to the inner wall of the reactor 1. This component force can effectively remove the scale. The scale between the two indentations is removed by "prying up" the inner wall of the reactor 1. The high-pressure water jet from the high-pressure nozzle 61 acts on the baffle plate 63, causing the mounting frame 62 to deflect and exposing the water jet from the high-pressure nozzle 61. Under the action of the torsion spring 65, the mounting frame 62 and the baffle plate 63 are reset again, and the above process is repeated to form a pulsed water flow. During the tilting and rolling of the indentation wheel 53, a downward component force is generated, causing the water distribution ring 3 to move down along the drive shaft 21 and form a spiral trajectory along the inner wall of the reactor 1. The spiral trajectory end faces of multiple indentation wheels 53 overlap, thus covering the entire inner wall of the reactor 1 and achieving comprehensive cleaning.

Claims

1. An automatic cleaning device for the inner wall of a chemical reactor, comprising a motor (2) mounted on the reactor (1), wherein the output end of the motor (2) passes through the reactor (1) and is fixedly connected to a drive shaft (21), characterized in that, Also includes: The water distribution ring (3) is slidably sleeved on the drive shaft (21); Multiple struts (4) are equidistantly distributed on the outer periphery of the water distribution ring (3); The indentation assembly (5) is located at the far end of the support rod (4) and can press out two parallel fracture marks on the hard scale on the inner wall of the reactor (1) as the support rod (4) rotates. The pulse jet assembly (6) includes a high-pressure nozzle (61) installed at the far end of the strut (4) and connected to the water distribution ring (3) via a conduit. The high-pressure nozzle (61) is installed at an angle downward and toward the upper layer of the fracture. The high-pressure nozzle (61) is equipped with a swing baffle structure so that the high-pressure nozzle (61) forms a pulse jet during the spraying process.

2. The automatic cleaning device for the inner wall of a chemical reactor according to claim 1, characterized in that, The water distribution ring (3) includes an outer ring body (31) and a cover (32) that is rotatably connected to the outer ring body (31), and the cover (32) is connected to the water inlet pipe (33).

3. The automatic cleaning device for the inner wall of a chemical reactor according to claim 1, characterized in that, The strut (4) includes two rods (41) with hinged ends, and a support spring (42) is provided between the two rods (41).

4. The automatic cleaning device for the inner wall of a chemical reactor according to claim 1, characterized in that, The indentation assembly (5) includes two mounting discs (51) rotatably disposed at the far end of the support rod (4), and a shaft (52) is fixedly disposed between the two mounting discs (51). Two parallel indentation wheels (53) are rotatably disposed on the shaft (52).

5. The automatic cleaning device for the inner wall of a chemical reactor according to claim 4, characterized in that, The shaft (52) is inclined to the axis of the mounting plate (51).

6. The automatic cleaning device for the inner wall of a chemical reactor according to claim 5, characterized in that, The cross-section of the drive shaft (21) is non-circular.

7. The automatic cleaning device for the inner wall of a chemical reactor according to claim 1, characterized in that, The swing baffle structure includes a mounting frame (62) rotatably mounted on the high-pressure nozzle (61). A torsion spring (65) is provided at the pivot position of the mounting frame (62). A baffle plate (63) is provided on the side of the mounting frame (62) near the output end of the high-pressure nozzle (61). A counterweight block (64) and a limiting plate (66) are provided at the other end of the mounting frame (62). When the limiting plate (66) contacts the high-pressure nozzle (61), the baffle plate (63) is located in front of the output end of the high-pressure nozzle (61).

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