A steam heated double pass mixing shaft

Abstract

The utility model discloses a kind of steam heating formula double-channel stirring shaft, including hollow outer shaft, coaxially arranged inner shaft in the outer shaft, shaft head being arranged at the working end of the outer shaft, and step being arranged at the driving end of the outer shaft;The inner end of the inner shaft is connected and positioned with the inside intermediate portion of the outer shaft through first connecting block;The outer end of the inner shaft protrudes the outer shaft, and is fixedly connected with the shaft tail end surface of the outer shaft through keyway cooperation and second connecting block;The outer end of the inner shaft is high-temperature steam input port;Condensate outlet is arranged on the outside of condensate water return channel formed between the outer shaft and the inner shaft, and the flow direction of steam and condensate water is opposite, to form counterflow heat exchange.The utility model is compact in structure, high in heat exchange efficiency, and evenly heated.

Description

Technical Field

[0001] This utility model relates to a stirring shaft, specifically a steam-heated dual-channel stirring shaft. Background Technology

[0002] In many industrial production processes, it is necessary to heat and stir the materials inside reactors. Traditional heating methods typically involve installing a jacket on the outside of the reactor or installing steam coils inside. External jacket heating suffers from drawbacks such as long heat conduction paths, low thermal efficiency, high energy consumption, and slow heating rates. While internal coil heating offers improved efficiency, the coil structure is complex, occupies valuable space inside the reactor, and is prone to scaling on its surface, leading to difficult cleaning and impacting heat transfer and product quality. Furthermore, some heating and stirring devices are structurally complex, making assembly and maintenance inconvenient.

[0003] Therefore, it is necessary to develop a heating stirring shaft that is simple in structure, has high thermal efficiency, provides uniform heating, and is easy to maintain, in order to overcome the shortcomings of existing technologies. Utility Model Content

[0004] To address the shortcomings of existing technologies, the purpose of this invention is to provide a steam-heated dual-channel stirring shaft with a compact structure, high heat exchange efficiency, and uniform heating.

[0005] To achieve the above objectives, this utility model employs the following technical solution: a steam-heated dual-channel stirring shaft, comprising a hollow outer shaft, an inner shaft coaxially disposed within the outer shaft, a shaft head disposed at the working end of the outer shaft, and a step disposed at the driving end of the outer shaft; the inner middle of the outer shaft is connected and positioned to the inner end of the inner shaft via a first connecting block; the outer end of the inner shaft extends out of the outer shaft and is fixedly connected to the tail end face of the outer shaft via a keyway and a second connecting block; the outer end of the inner shaft is a high-temperature steam inlet; a condensate outlet is provided on the outer side of the condensate return channel formed between the outer shaft and the inner shaft, with the steam and condensate flowing in opposite directions, forming countercurrent heat exchange.

[0006] Preferably, the first connecting block and the second connecting block are cross-shaped or ring-shaped blocks to ensure the concentricity of the inner shaft and the outer shaft.

[0007] Preferably, the shaft head is detachably connected to a stirring blade or stirring teeth.

[0008] Preferably, a mechanical seal or packing seal is provided at the connection between the outer end of the inner shaft and the outer shaft.

[0009] Preferably, the outer wall surface of the inner shaft is provided with a number of axially extending heat-conducting fins to increase the heat exchange area.

[0010] The beneficial effects of this utility model are: 1. The design employs a dual-channel system, with steam introduced through the inner shaft and condensate returned through the jacket, enabling direct heat exchange between the steam and the stirring shaft. The counter-current flow of steam and condensate fully utilizes the latent heat of the steam, resulting in a significantly higher heat exchange efficiency than traditional jacketed or coil heating systems.

[0011] 2. Heat is transferred directly from the inside of the stirring shaft to the outside, making the temperature distribution in the entire stirring area more uniform and avoiding the problems of local overheating or insufficient heating, which is conducive to improving reaction quality and product quality.

[0012] 3. The heating element and stirring shaft are integrated into one design, resulting in a compact structure that does not occupy extra space inside the reactor and simplifies the overall structure of the reactor.

[0013] 4. The overall structure is simple, the connection is reliable, and there are no complicated internal coils, which reduces the risk of scaling and makes it easy to install, disassemble and maintain. Attached Figure Description

[0014] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments; Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 for Figure 1 Enlarged schematic diagram of Part I; Figure 3 This is a schematic diagram of the structure of the first connecting block of this utility model; Figure 4 This is a schematic diagram of the shaft head of this utility model. Detailed Implementation

[0015] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0016] Reference Figure 1-4 The specific embodiment adopts the following technical solution: a steam-heated dual-channel stirring shaft, including a hollow outer shaft 1, an inner shaft 2 coaxially disposed inside the outer shaft 1, a shaft head 3 disposed at the working end of the outer shaft 1, and a step 7 disposed at the driving end of the outer shaft 1; the inner middle of the outer shaft 1 is connected and positioned to the inner end of the inner shaft 2 through a first connecting block 4; the outer end of the inner shaft 2 extends out of the outer shaft 1 and is fixedly connected to the shaft tail end face of the outer shaft 1 through a keyway and a second connecting block 5; the outer end of the inner shaft 2 is a high-temperature steam inlet 6; a condensate outlet 8 is provided on the outside of the condensate return channel formed between the outer shaft 1 and the inner shaft 2, and the steam and condensate flow in opposite directions to form countercurrent heat exchange.

[0017] It is worth noting that the first connecting block 4 and the second connecting block 5 are cross-shaped or ring-shaped blocks, used to ensure the concentricity of the inner shaft 2 and the outer shaft 1.

[0018] It is worth noting that the shaft head 3 is detachably connected to a stirring blade or stirring teeth.

[0019] It is worth noting that a mechanical seal or packing seal is provided at the connection between the outer end of the inner shaft 2 and the outer shaft 1.

[0020] In addition, the outer wall surface of the inner shaft 2 is provided with several axially extending heat-conducting fins to increase the heat exchange area.

[0021] The working principle of this specific embodiment is as follows: High-temperature steam enters from the high-temperature steam inlet at the outer end of the inner shaft and is transported to the working end of the stirring shaft through the internal channel of the inner shaft. The outer wall of the inner shaft is equipped with axial heat-guiding fins, which expand the heat exchange area between the inner and outer shafts, allowing for efficient transfer of steam heat to the outer shaft and the stirring blades / teeth connected to the shaft head, thus heating the material. Simultaneously, the condensate formed by the steam after heat exchange flows outward through the condensate return channel between the outer and inner shafts. The condensate outlet is located outside the return channel, and the steam and condensate flow in opposite directions, forming counter-current heat exchange, further improving heat exchange efficiency. The first and second connecting blocks (cross-shaped or ring-shaped) ensure concentricity between the inner and outer shafts. Mechanical seals or packing seals prevent steam leakage. Finally, the rotating heating and stirring components achieve uniform heating and stirring of the material.

[0022] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A steam-heated dual-channel stirring shaft, characterized in that, The structure includes a hollow outer shaft (1), an inner shaft (2) coaxially disposed inside the outer shaft (1), a shaft head (3) disposed at the working end of the outer shaft (1), and a step (7) disposed at the driving end of the outer shaft (1); the inner middle of the outer shaft (1) is connected and positioned to the inner end of the inner shaft (2) through a first connecting block (4); the outer end of the inner shaft (2) extends out of the outer shaft (1) and is fixedly connected to the shaft tail end face of the outer shaft (1) through a keyway and a second connecting block (5); the outer end of the inner shaft (2) is a high-temperature steam inlet (6); a condensate outlet (8) is provided on the outside of the condensate return channel formed between the outer shaft (1) and the inner shaft (2), and the steam and condensate flow in opposite directions to form countercurrent heat exchange.

2. The steam-heated dual-channel stirring shaft according to claim 1, characterized in that, The first connecting block (4) and the second connecting block (5) are cross-shaped or ring-shaped blocks, used to ensure the concentricity of the inner shaft (2) and the outer shaft (1).

3. The steam-heated dual-channel stirring shaft according to claim 1, characterized in that, The shaft head (3) is detachably connected to a stirring blade or stirring teeth.

4. The steam-heated dual-channel stirring shaft according to claim 1, characterized in that, A mechanical seal or packing seal is provided at the connection between the outer end of the inner shaft (2) and the outer shaft (1).

5. A steam-heated dual-channel stirring shaft according to claim 1, characterized in that, The outer wall of the inner shaft (2) is provided with several axially extending heat-conducting fins to increase the heat exchange area.

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