An electric suspension preheater

Abstract

This utility model discloses an electrothermal suspension preheater, including a preheater body and a heat equalization mechanism. The preheater body includes a shell and a heating unit, with the heating unit disposed at the bottom of the shell. The heat equalization mechanism includes a swirling dispersion unit, a multi-stage umbrella-shaped flow guiding unit, and a vortex heat equalization unit arranged sequentially from top to bottom within the shell. The swirling dispersion unit includes swirling dispersion plates fixed within the shell. This utility model achieves initial uniform distribution of materials through the swirling dispersion unit, and significantly extends the material residence time and heat exchange area by combining the multi-stage staggered umbrella-shaped flow guiding unit. Simultaneously, a multi-stage zoned synergistic heating system, consisting of an electric heating element integrated within the flow guide hood, an inner wall auxiliary heating layer, and bottom auxiliary hot air, achieves active, stable, and efficient heating of the materials, forming a strong counter-current heat exchange with the bottom-up airflow. This improves thermal energy utilization and preheating uniformity, effectively reducing energy consumption.

Description

Technical Field

[0001] This utility model belongs to the field of preheater technology, specifically relating to an electrothermal suspension preheater. Background Technology

[0002] An electric suspension preheater is a device that uses electrical energy to heat gas and allows materials to exchange heat with the high-temperature gas while in a suspended state. Existing electric suspension preheaters typically include a preheater body, an electric heating element installed within the body, a feed inlet, a discharge outlet, a hot gas inlet, and an exhaust gas outlet.

[0003] Current electric suspension preheaters generally suffer from the following technical problems during operation: short contact time between materials and high-temperature hot gas, uneven mixing, resulting in insufficient heat exchange, low thermal energy utilization, and high energy consumption; at the same time, uneven distribution of materials in the preheating chamber can easily lead to local overheating or flow short circuits, affecting preheating uniformity and product stability.

[0004] Therefore, in order to address the above-mentioned technical problems, it is necessary to provide an electrothermal suspension preheater.

[0005] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0006] The purpose of this invention is to provide an electric suspension preheater that is highly efficient, energy-saving, and provides uniform material preheating.

[0007] To achieve the above objectives, the technical solution provided by a specific embodiment of this utility model is as follows:

[0008] An electric heating suspension preheater includes a preheater body and a heat equalization mechanism. The preheater body includes a shell and a heating unit. The heating unit is disposed at the bottom of the shell. The heat equalization mechanism includes a swirling dispersion unit, a multi-stage umbrella-shaped flow guiding unit, and a vortex heat equalization unit arranged sequentially from top to bottom within the shell. The swirling dispersion unit includes a swirling dispersion plate fixed within the shell. The multi-stage umbrella-shaped flow guiding unit includes a first umbrella-shaped flow guiding hood and a plurality of second umbrella-shaped flow guiding hoods. The first umbrella-shaped flow guiding hood is disposed directly below the swirling dispersion plate. The plurality of second umbrella-shaped flow guiding hoods are arranged in a ring on the same horizontal plane at the bottom of the first umbrella-shaped flow guiding hood, and the central axis of the second umbrella-shaped flow guiding hood is located at the edge of the first umbrella-shaped flow guiding hood. The vortex heat equalization unit includes a spiral flow guiding rib fixedly connected to the inner sidewall of the shell.

[0009] In one or more embodiments of the present invention, the heating unit includes an auxiliary heating layer, which is applied to the inner wall of the preheater body.

[0010] In one or more embodiments of the present invention, the heating unit further includes a hot air delivery pipe fixed to the outer wall of the bottom of the housing, and a regulating valve is fixedly connected to the hot air delivery pipe.

[0011] In one or more embodiments of this utility model, a feed pipe is fixedly connected to the center of the top wall panel of the housing, and a discharge pipe is fixedly connected to the bottom wall panel of the housing.

[0012] In one or more embodiments of the present invention, the cyclone dispersion unit further includes a connecting shaft, the cyclone dispersion plate is arranged around the connecting shaft, and the connecting shaft is coaxially arranged with the feed pipe.

[0013] In one or more embodiments of this utility model, a first fixing rod is fixedly connected between the connecting shaft and the inner wall of the housing, a second fixing rod is fixedly connected between the first umbrella-shaped flow guide and the inner wall of the housing, and a plurality of second umbrella-shaped flow guides are respectively fixedly connected to the inner wall of the housing with a third fixing rod.

[0014] In one or more embodiments of the present invention, the heating unit further includes a heating element laid on the inner wall of the first umbrella-shaped guide shroud, and the wiring terminals of the heating element are fixedly connected to a cable.

[0015] In one or more embodiments of this utility model, a through-hole is provided in the second fixing rod, and the end of the cable away from the heating element passes through the through-hole and is led out to the outside of the housing.

[0016] In one or more embodiments of this utility model, the surfaces of the swirl dispersion plate, the first umbrella-shaped flow guide, and the second umbrella-shaped flow guide are all coated with a high-temperature resistant and non-stick coating.

[0017] In one or more embodiments of the present invention, the spiral guide rib is configured to rotate in the opposite direction to the initial rotation direction of the material in the swirling dispersion plate.

[0018] Compared with existing technologies, this invention achieves initial uniform distribution of materials through a swirling dispersion unit, and significantly extends the material residence time and heat exchange area by combining multi-level staggered umbrella-shaped flow guiding units. At the same time, a multi-level zoned synergistic heating system composed of electric heating elements integrated in the flow guiding hood, an inner wall auxiliary heating layer, and bottom auxiliary hot air is adopted to achieve active, stable, and efficient heating of materials, and to form a strong counter-current heat exchange with the bottom-up airflow. This improves the thermal energy utilization rate and the uniformity of preheating, and effectively reduces energy consumption. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a front view of an electrothermal suspension preheater according to an embodiment of the present invention;

[0021] Figure 2 This is a cross-sectional view of an electrothermal suspension preheater according to an embodiment of the present invention;

[0022] Figure 3 This is a cross-sectional view of an electrothermal suspension preheater according to an embodiment of the present invention;

[0023] Figure 4 This utility model Figure 3 A schematic diagram at point A in the middle;

[0024] Figure 5 This is a schematic diagram of the swirl dispersion unit in this utility model;

[0025] Figure 6 This is a schematic diagram of the multi-stage umbrella-shaped flow guiding unit in this utility model.

[0026] Explanation of key figure labels:

[0027] 1-Preheater body, 11-Shell, 12-Auxiliary heating layer, 13-Hot air delivery pipe, 14-Regulating valve, 15-Infeed pipe, 16-Outlet pipe, 2-Heating mechanism, 21-Swirl dispersion plate, 22-Connecting shaft, 23-First fixing rod, 24-First umbrella-shaped guide shroud, 25-Second umbrella-shaped guide shroud, 26-Heating element, 27-Cable, 28-Second fixing rod, 29-Wire groove, 210-Third fixing rod, 211-Spiral guide rib. Detailed Implementation

[0028] To enable those skilled in the art to better understand the technical solutions in this disclosure, the technical solutions in the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this disclosure.

[0029] like Figures 1-6 As shown, an embodiment of the present invention provides an electrothermal suspension preheater, comprising a preheater body 1 and a heat equalization mechanism 2. The preheater body 1 includes a shell 11 and a heating unit. The heating unit is disposed at the bottom of the shell 11. The heat equalization mechanism 2 includes a swirling dispersion unit, a multi-stage umbrella-shaped flow guiding unit, and a vortex heat equalization unit, arranged sequentially from top to bottom within the shell 11. The swirling dispersion unit includes a swirling dispersion plate 21 fixed within the shell 11. The multi-stage umbrella-shaped flow guiding unit includes a first umbrella-shaped flow guiding hood 24 and multiple second umbrella-shaped flow guiding hoods 25. The first umbrella-shaped flow guiding hood 24 is disposed directly below the swirling dispersion plate 21. Multiple second umbrella-shaped flow guiding hoods 25 are arranged in a ring on the same horizontal plane at the bottom of the first umbrella-shaped flow guiding hood 24, and the central axis of the second umbrella-shaped flow guiding hoods 25 is located at the edge of the first umbrella-shaped flow guiding hood 24. The vortex heat equalization unit includes a spiral flow guiding rib 211 fixedly connected to the inner wall of the shell 11.

[0030] The working principle of this electrothermal suspension preheater is as follows: After the material enters the shell 11, it first passes through the swirling dispersion unit, where it is forcibly dispersed and given an initial rotational velocity, forming a centrifugal diffusion curtain of material. Subsequently, the material falls to the multi-stage umbrella-shaped guiding unit, where it is repeatedly received, guided, and re-scattered by multiple layers of staggered umbrella-shaped surfaces, greatly extending the residence time and heat exchange area of ​​the material in the cavity. At the same time, the heating unit continuously and efficiently heats the material through high-temperature radiation and auxiliary hot airflow. Finally, the airflow and material enter the vortex homogenization unit, where the spiral guiding ribs 211 on the cavity wall guide the airflow to form a rotating vortex, further enhancing gas-solid mixing and heat homogenization. The preheated material is discharged from the bottom, while the exhaust gas is discharged from the top.

[0031] like Figure 2 and Figure 3 As shown, the heating unit includes an auxiliary heating layer 12, which is applied to the inner wall of the preheater body 1. The auxiliary heating layer 12 serves as a supplementary heat source, providing uniform radiative heating to the edge area of ​​the cavity, preventing temperature gradients caused by the "cold wall" effect from adhering to materials, improving overall preheating uniformity, and reducing heat loss.

[0032] like Figures 1-3 As shown, the heating unit also includes a hot air delivery pipe 13 fixed to the outer wall of the bottom of the housing 11. A regulating valve 14 is fixedly connected to the hot air delivery pipe 13 to provide adjustable auxiliary hot air input, serving as an effective supplement or backup heat source for the electric heating system, thereby enhancing the system's adaptability to different materials or working conditions and improving heating reliability.

[0033] like Figures 1-3As shown, a feed pipe 15 is fixedly connected to the center of the top wall panel of the shell 11, and a discharge pipe 16 is fixedly connected to the bottom wall panel of the shell 11. The material inlet and outlet paths are clearly defined and optimized to form a stable countercurrent heat exchange pattern between the top-down material flow and the bottom-up airflow.

[0034] like Figure 3 and Figure 5 As shown, the cyclone dispersion unit also includes a connecting shaft 22, with cyclone dispersion plates 21 arranged around the connecting shaft 22, and the connecting shaft 22 is coaxially arranged with the feed pipe 15. This ensures the structural concentricity and stability of the cyclone dispersion unit, allowing the material to fall vertically from the feed pipe 15 and be accurately captured and guided by the cyclone dispersion plates 21, achieving uniform initial diffusion.

[0035] like Figure 2 and Figure 3 As shown, a first fixing rod 23 is fixedly connected between the connecting shaft 22 and the inner wall of the housing 11, and a second fixing rod 28 is fixedly connected between the first umbrella-shaped air guide 24 and the inner wall of the housing 11. Multiple second umbrella-shaped air guides 25 are respectively fixedly connected to the inner wall of the housing 11 by third fixing rods 210. This provides robust mechanical support and positioning, ensuring the structural rigidity and relative positional accuracy of each component under high-temperature conditions.

[0036] like Figure 3 and Figure 4 As shown, the heating unit also includes a heating element 26 laid on the inner wall of the first umbrella-shaped flow guide shroud 24, and a cable 27 is fixedly connected to the wiring terminal of the heating element 26. By directly integrating the heating element 26 into the core flow guide component, the first umbrella-shaped flow guide shroud 24, direct and efficient heating of the first umbrella-shaped flow guide shroud 24 is achieved, making its surface a stable high-temperature contact heat source and radiation surface, fundamentally enhancing the heat exchange intensity with the material.

[0037] like Figure 3 and Figure 4 As shown, a through-hole groove 29 is provided inside the second fixing rod 28. The end of the cable 27 away from the heating element 26 passes through the through-hole groove 29 and is led out to the outside of the housing 11, so as to provide a safe, concealed and neat power lead path for the heating element 26, avoid the cable being exposed, tangled or interfered with by materials in the high temperature cavity, and improve electrical safety and overall equipment reliability.

[0038] Preferably, the surfaces of the swirl dispersion plate 21, the first umbrella-shaped flow guide shroud 24, and the second umbrella-shaped flow guide shroud 25 are all coated with a high-temperature resistant and non-stick coating, which effectively reduces the adhesion and accumulation of high-humidity or easily sticky materials on the critical working surfaces, reduces the reduction in flow area, increase in thermal resistance, and performance degradation caused by material accumulation, and ensures long-term operational stability.

[0039] Preferably, the spiral guide rib 211 is configured to rotate in the opposite direction to the initial rotation direction of the material in the swirling dispersion plate 21, thereby creating a strong shear airflow in the vortex heat homogenization cavity that is opposite to the rotation direction of the material, greatly enhancing the turbulent mixing degree of the gas-solid two-phase flow, breaking the flow boundary layer, and thus achieving more complete heat exchange and temperature homogenization.

[0040] In use, the material enters through the top feed pipe 15 and is first dispersed by the swirling dispersion plate 21 and given tangential velocity to form a centrifugal diffusion rotating material curtain. The falling material then enters the multi-stage umbrella-shaped flow guiding unit, where it is repeatedly received, guided and scattered by the first umbrella-shaped flow guiding hood 24 and multiple second umbrella-shaped flow guiding hoods 25 arranged in a ring below it. This process greatly extends the material residence time and increases its exposed heat exchange area. Simultaneously, a multi-stage, zoned integrated heating system begins operation: the heating element 26 located on the inner wall of the first umbrella-shaped guide shroud 24 directly heats the guide surface at high temperature, making it an active contact and radiant heat source; an auxiliary heating layer laid on the inner wall of the shell compensates for edge heat loss; the hot air delivery pipe at the bottom introduces auxiliary hot airflow, flowing from bottom to top, forming a strong counter-current convection heat exchange with the falling material; finally, the material and airflow enter the vortex homogenization unit, where the spiral guide ribs 211 on the cavity wall guide the airflow to generate strong shear turbulence, achieving the final deep heat exchange and homogenization. The preheated material is discharged from the bottom, and the exhaust gas is discharged from the top. This scheme achieves efficient and uniform preheating of materials through the synergy of "mechanical dispersion, active electrothermal surface, and counter-current airflow".

[0041] It will be apparent to those skilled in the art that this disclosure is not limited to the details of the exemplary embodiments described above, and that this disclosure can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of this disclosure is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this disclosure. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0042] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An electrothermal suspension preheater, characterized in that, include: The preheater body includes a shell and a heating unit, wherein the heating unit is disposed at the bottom of the shell; The heat equalization mechanism includes a swirling dispersion unit, a multi-stage umbrella-shaped flow guiding unit, and a vortex heat equalization unit arranged sequentially from top to bottom within the housing. The swirling dispersion unit includes a swirling dispersion plate fixed within the housing. The multi-stage umbrella-shaped flow guiding unit includes a first umbrella-shaped flow guiding hood and multiple second umbrella-shaped flow guiding hoods. The first umbrella-shaped flow guiding hood is located directly below the swirling dispersion plate. The multiple second umbrella-shaped flow guiding hoods are arranged in a ring on the same horizontal plane at the bottom of the first umbrella-shaped flow guiding hood, and the central axis of the second umbrella-shaped flow guiding hood is located at the edge of the first umbrella-shaped flow guiding hood. The vortex heat equalization unit includes a spiral flow guiding rib fixedly connected to the inner sidewall of the housing.

2. An electrothermal suspension preheater according to claim 1, characterized in that The heating unit includes an auxiliary heating layer, which is laid on the inner wall of the preheater body.

3. An electrothermal suspension preheater according to claim 1, characterized in that The heating unit also includes a hot air delivery pipe fixed to the outer wall of the bottom of the housing, and a regulating valve is fixedly connected to the hot air delivery pipe.

4. An electrothermal suspension preheater according to claim 1, characterized in that A feed pipe is fixedly connected to the center of the top wall panel of the housing, and a discharge pipe is fixedly connected to the bottom wall panel of the housing.

5. An electrothermal suspension preheater according to claim 4, characterised in that The cyclone dispersion unit further includes a connecting shaft, the cyclone dispersion plates are arranged around the connecting shaft, and the connecting shaft is coaxial with the feed pipe.

6. An electrothermal suspension preheater according to claim 5, characterised in that A first fixing rod is fixedly connected between the connecting shaft and the inner wall of the housing, a second fixing rod is fixedly connected between the first umbrella-shaped flow guide and the inner wall of the housing, and a plurality of second umbrella-shaped flow guides are respectively fixedly connected to the inner wall of the housing with a third fixing rod.

7. An electrothermal suspension preheater according to claim 6, characterised in that The heating unit also includes a heating element laid on the inner wall of the first umbrella-shaped flow guide, and the wiring terminals of the heating element are fixedly connected to a cable.

8. An electrothermal suspension preheater according to claim 7, characterized in that, The second fixing rod has a through-hole groove, and the end of the cable away from the heating element passes through the through-hole and leads out to the outside of the housing.

9. An electrothermal suspension preheater according to claim 1, characterized in that, The surfaces of the swirl dispersion plate, the first umbrella-shaped guide hood, and the second umbrella-shaped guide hood are all coated with a high-temperature resistant, non-stick coating.

10. An electrothermal suspension preheater according to claim 1, characterized in that, The spiral guide ribs are configured to rotate in the opposite direction to the initial rotation direction of the material in the swirling dispersion plate.

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