A drying device for processing calcium silicate boards

Abstract

This utility model relates to a drying device for processing calcium silicate boards, belonging to the field of calcium silicate board processing technology. It includes: a main body with a drying chamber inside; a placement rack fixedly installed at the bottom of the drying chamber, with calcium silicate board placement slots evenly spaced along the width of the main body to form narrow flow channels between adjacent calcium silicate boards; distribution pipes symmetrically and evenly arranged on both sides of the placement rack; and air nozzles evenly spaced on each distribution pipe, facing the corresponding flow channel inlet. This utility model, through the designed flow channels and air nozzles, achieves rapid and uniform drying of the calcium silicate boards, effectively improving drying efficiency and drying effect.

Description

Technical Field

[0001] This utility model relates to the field of calcium silicate board processing technology, and specifically to a drying device for calcium silicate board processing. Background Technology

[0002] When processing calcium silicate boards, they need to be dried. Traditional drying equipment dries calcium silicate boards by blowing air onto the boards through unidirectional nozzles in a closed space, creating laminar flow on the surface of the boards. Due to the laminar flow, a boundary layer is formed on the surface of the calcium silicate boards. This is a static thin layer with almost zero airflow velocity, and heat can only pass through the boundary layer through slow heat conduction, resulting in low and uneven drying efficiency. Utility Model Content

[0003] The purpose of this invention is to provide a drying device for processing calcium silicate boards, which solves the technical problems of low drying efficiency and uneven drying in the prior art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a drying device for processing calcium silicate boards, comprising:

[0005] The main body has a drying chamber inside;

[0006] A placement rack is fixedly installed at the bottom of the drying chamber. The placement rack has equidistant slots for placing calcium silicate boards along the width of the body, so that a narrow flow channel is formed between adjacent calcium silicate boards.

[0007] The diversion pipes are symmetrically and equidistantly arranged on both sides of the placement rack;

[0008] The air nozzles are evenly spaced on each branch pipe and face the corresponding flow channel inlet;

[0009] The diverter pipe is positioned corresponding to the flow channel, and the blower nozzles blow airflow simultaneously from both sides into the same flow channel, so that the airflows on both sides form a positive countercurrent in the flow channel. The positively countercurrent airflows interact with each other in the narrow flow channel to generate a turbulent flow field, thereby enhancing the heat and mass exchange between the airflow and the surface of the calcium silicate board.

[0010] Preferably, the air nozzle in the middle of the diversion tube is horizontally arranged, and the air nozzles on the remaining two sides are inclined towards the middle, with the inclination angle increasing progressively.

[0011] Preferably, the increment of the tilt angle is 5°.

[0012] Preferably, air inlet pipes are symmetrically arranged on both sides of the main body, and air guide pipes are connected to the air outlets of the air inlet pipes. The air guide pipes are connected to the diversion pipes.

[0013] Preferably, the top of the body is provided with a ventilation opening.

[0014] In the above technical solution, the drying device for processing calcium silicate boards provided by this utility model has the following beneficial effects:

[0015] This invention, through its designed flow-guiding channels and nozzles, prevents the airflow disturbances generated by the counter-current from spreading freely like in an open space. Instead, these disturbances are confined within the channels, constantly reflecting and superimposing. This counter-current causes instantaneous turbulence in the airflow velocity field, forcing some airflow to change direction and causing others to suddenly decrease or increase in velocity. The frictional resistance of the calcium silicate board surface further exacerbates this turbulence, leading to the continuous generation, expansion, and interaction of local vortices. Ultimately, the originally regular airflow motion is completely disrupted, forming a turbulent field filled with random vortices. In laminar flow, a boundary layer forms on the calcium silicate board surface—a stationary thin layer with almost zero airflow velocity. Heat can only pass through this boundary layer through slow heat conduction. However, in turbulent flow, the turbulent vortices strongly disturb the boundary layer. The airflow can even directly wash over the surface of the calcium silicate board, breaking through the barrier of the static thin layer and allowing the heat of the hot air to be transferred to the board more quickly, accelerating moisture evaporation. The random motion of the turbulent flow allows the airflow to contact all areas of the calcium silicate board more evenly, avoiding uneven drying caused by local dead zones in laminar flow. At the same time, the strong mixing effect of the turbulent flow can quickly carry away the water vapor evaporated on the surface of the calcium silicate board, maintaining a high humidity gradient between the surface and the airflow, further promoting continuous moisture evaporation. Because the guide channel is narrow and the turbulence is confined within the channel, the energy of the airflow is concentrated near the calcium silicate board, reducing ineffective losses in the open area of ​​the drying chamber and improving the drying effect per unit of energy consumption. This achieves rapid and uniform drying of the calcium silicate board, effectively improving drying efficiency and drying effect. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments 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.

[0017] Figure 1 A three-dimensional structural schematic diagram provided for an embodiment of this utility model;

[0018] Figure 2 This is a schematic diagram of the front cross-sectional structure provided for an embodiment of the present utility model;

[0019] Figure 3 This is a schematic diagram of the airflow direction provided for an embodiment of the present utility model;

[0020] Figure 4 This is a side cross-sectional structural diagram provided for an embodiment of the present utility model.

[0021] Explanation of reference numerals in the attached figures:

[0022] 1. Main body; 2. Air inlet duct; 3. Air guide duct; 4. Diverter duct; 5. Air nozzle; 6. Placement rack. Detailed Implementation

[0023] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0024] like Figure 1-4 As shown, a drying apparatus for processing calcium silicate boards includes:

[0025] Body 1, which has a drying chamber inside;

[0026] The placement rack 6 is fixedly installed at the bottom of the drying chamber. The placement rack 6 has equidistant slots for placing calcium silicate plates along the width direction of the main body 1, so that a narrow flow channel is formed between adjacent calcium silicate plates.

[0027] Diverter pipes 4 are symmetrically and equidistantly arranged on both sides of the placement rack 6;

[0028] The blower nozzles 5 are equidistantly arranged on each of the branch pipes 4 and face the corresponding flow channel inlet;

[0029] The diversion pipe 4 is positioned corresponding to the flow channel, and the air nozzles 5 blow airflow from both sides into the same flow channel at the same time, so that the airflow on both sides forms a positive collision in the flow channel. The positively colliding airflows interact in the narrow flow channel to generate a turbulent flow field, thereby enhancing the heat and mass exchange between the airflow and the surface of the calcium silicate plate.

[0030] Specifically, during drying, the calcium silicate board is first placed in the calcium silicate board placement slot on the placement rack 6, thus forming a narrow guide channel between two adjacent calcium silicate boards. Hot air is introduced into the split pipe 4, and hot air is blown into the same guide channel from both sides through the blower nozzle 5. The two air streams collide head-on in the guide channel, forming a positive collision. At this time, the air speeds are in opposite directions, and a violent momentum exchange occurs at the collision point. Because the guide channel is narrow, the airflow disturbance generated by the collision cannot diffuse freely like in an open space, but is confined in the channel and continuously reflected and superimposed. The collision causes the airflow velocity field to become instantly turbulent. Some airflows are forced to change direction, and the airflow speed of some airflows decreases or increases suddenly. The frictional resistance of the calcium silicate board surface to the airflow further aggravates this turbulence, causing local vortices to be continuously generated, expanded and interact. Finally, the originally regular airflow motion is completely broken, forming a turbulent field full of random vortices.

[0031] Furthermore, in laminar flow, a boundary layer forms on the surface of the calcium silicate board, a static thin layer with almost zero airflow velocity. Heat can only pass through the boundary layer through slow heat conduction. However, in turbulent flow, the chaotic vortex strongly disturbs the boundary layer and may even directly wash over the surface of the calcium silicate board, breaking the barrier of the static thin layer. This allows the heat of the hot air to be transferred to the board more quickly, accelerating moisture evaporation. The random motion of turbulence allows the airflow to contact all areas of the calcium silicate board more evenly, avoiding uneven drying caused by local dead zones in laminar flow. At the same time, the strong mixing effect of turbulence can quickly carry away the water vapor evaporated on the surface of the calcium silicate board, maintaining a high humidity gradient between the surface and the airflow, further promoting continuous moisture evaporation. Because the guide channel is narrow and the turbulence is confined within the channel, the energy of the airflow is concentrated near the calcium silicate board, reducing ineffective losses in the open areas of the drying chamber and improving the drying effect per unit of energy consumption. This achieves rapid and uniform drying of the calcium silicate board, effectively improving drying efficiency and drying effect.

[0032] As a further embodiment of this utility model, the air nozzle 5 in the middle of the diversion pipe 4 is horizontally arranged, and the air nozzles 5 on the remaining two sides are inclined towards the middle, with the inclination angle increasing progressively.

[0033] As a further embodiment of this utility model, the tilt angle increment is 5°.

[0034] Specifically, the air nozzles 5 on the splitter pipe 4 are divided into two categories according to their positions, forming a gradient distribution of "horizontal in the middle + increasing slope on both sides":

[0035] Set horizontally (i.e., parallel to the axis of the flow channel), directly aligned with the central area of ​​the flow channel;

[0036] Side air nozzles 5: As they extend from the middle to both ends of the split pipe 4, the tilt angle of the air nozzles gradually increases. The first side air nozzle adjacent to the middle tilts at 5°, the second one tilts at 10°, and so on, and all tilt directions are towards the middle of the guide channel.

[0037] The central nozzle 5 blows horizontally, with the airflow direction aligned with the axis of the guide channel. This allows it to directly enter the center of the channel, forming a stable core countercurrent flow. If the side nozzles 5 were also horizontally positioned, the edge nozzles 5, being closer to the edge of the guide channel, would allow the airflow to diffuse outwards, resulting in insufficient airflow on both sides and creating drying blind spots. The design with increasing tilt angles allows the edge nozzles 5 to actively turn, while the side nozzles 5 closer to the center have smaller tilt angles, requiring only minor adjustments to merge into the central area of ​​the channel. The side nozzles 5 further away from the center have larger tilt angles, compensating for distance deviations through greater turning and ensuring precise airflow. By targeting the edge region of the injection channel, the airflow from all nozzles 5 can ultimately be directed into the guide channel, achieving full-area airflow coverage from the center to the edge of the channel. The collision between horizontal and inclined airflows not only results in a direct collision but also generates lateral shear force, inducing the generation of more small-scale vortices. Airflows at the same inclination angle form a gradient collision within the channel. The collision intensity in the middle is stable, while the collision intensity on both sides gradually increases with the angle, avoiding uneven turbulence distribution caused by collision in a single direction. The angle gradient ensures full-area airflow coverage, and the multi-directional collision stimulates complex turbulence, further improving the drying efficiency and uniformity of the calcium silicate board.

[0038] As a further embodiment of this utility model, air inlet pipes 2 are symmetrically arranged on both sides of the main body 1, and air guide pipes 3 are connected to the air outlets of the air inlet pipes 2. The air guide pipes 3 are connected to the diversion pipes 4.

[0039] Specifically, the hot airflow enters the air duct 3 through the air inlet duct 2, and then is diverted from the air duct 3 into the diversion duct 4.

[0040] As a further embodiment of this utility model, a ventilation opening is provided on the top of the main body 1.

[0041] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A drying device for processing of calcium silicate board, characterized in that include: The main body (1) has a drying chamber inside; The placement rack (6) is fixedly installed at the bottom of the drying chamber. The placement rack (6) is provided with equidistant slots for placing calcium silicate plates along the width direction of the body (1) so that a narrow flow channel is formed between adjacent calcium silicate plates. The diversion pipe (4) is symmetrically and equidistantly arranged on both sides of the placement rack (6); The blower nozzles (5) are equidistantly arranged on each of the branch pipes (4) and face the corresponding flow channel inlet; The diverter (4) is positioned corresponding to the guide channel, and the blower (5) blows airflow from both sides into the same guide channel simultaneously, so that the airflow on both sides forms a positive collision in the guide channel. The positively colliding airflows interact in the narrow guide channel to generate a turbulent flow field, thereby enhancing the heat and mass exchange between the airflow and the surface of the calcium silicate board.

2. The drying device for processing of calcium silicate board according to claim 1, characterized in that, The air nozzle (5) in the middle of the diversion pipe (4) is set horizontally, and the air nozzles (5) on the remaining two sides are set inclined towards the middle, with the inclination angle increasing progressively.

3. The drying device for processing of calcium silicate board according to claim 2, characterized in that, The increment of the tilt angle is 5°.

4. The drying apparatus for processing calcium silicate boards according to claim 1, characterized in that, The main body (1) is symmetrically provided with air inlet pipes (2) on both sides, and the air outlet of the air inlet pipe (2) is connected to the air guide pipe (3), which is connected to the diversion pipe (4).

5. The drying device for processing of calcium silicate board according to claim 1, characterized in that, The top of the main body (1) is provided with a ventilation opening.

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