Energy-saving double wind box drying system

Abstract

The utility model discloses an energy -conserving type double air bellow drying system relates to drying technical field. The utility model discloses: drying box, built -in has the feeding net belt, air supply box, is located drying box's both sides, and the upper side wall of air supply box is linked with drying box, and the upper cavity of air supply box is provided with the air distribution mechanism that links with the air supply mechanism, and the air distribution mechanism is used to send into the hot air in air supply box, exhaust mechanism, and the bottom side wall of drying box is linked with the air inlet end, and the exhaust end is communicated with outside from air supply box, and constructs and is used for the exhaust fan of dehumidification, circulation mechanism, including being located the axial flow fan of air supply box bottom, and the bottom side wall of drying box is linked with the import part of axial flow fan, and the air outlet end of axial flow fan is vertically set up, and the moisture air path of exhaust mechanism and the fresh air path of air supply mechanism pass through the heat exchange box and heat exchange, just can realize through convenient means, and let the dry gas in drying box circulate, and its realization even drying, the purpose of heat reuse.

Description

Technical Field

[0001] This utility model relates to the field of drying technology, specifically, an energy-saving dual-airbox drying system. Background Technology

[0002] Mesh belt dryers, also known as belt dryers or mesh belt dryers, are efficient and continuous drying equipment widely used in various industries such as food processing, agricultural and sideline products, chemicals, metallurgy, building materials, pharmaceuticals, and environmental protection. Their core principle is to utilize hot air to penetrate the material layer, combined with the uniform movement of the conveyor belt, to achieve gentle and uniform dehydration and drying of large quantities of wet materials.

[0003] Existing dual-airbox drying systems, such as Chinese patent CN208968221U, disclose an air-source belt dryer. This dryer uses top exhaust during material drying. Furthermore, in the aforementioned patent, the drying airflow passes through the material layer from bottom to top within the drying chamber, carrying away moisture before being discharged. This results in two problems: firstly, hot, humid air is directly released into the atmosphere, leading to significant heat waste; secondly, because the hot air passes through the material from bottom to top, the material at the bottom is prone to gelatinization due to its higher temperature and lower humidity, while the material at the top has a lower temperature and higher humidity, resulting in poor drying performance. Utility Model Content

[0004] The purpose of this invention is to provide an energy-saving dual-box drying system that enables the drying gas inside the drying box to circulate through convenient means, thereby achieving uniform drying and heat recovery.

[0005] To achieve the above objectives, the present invention employs the following technical means:

[0006] An energy-saving dual-box drying system includes:

[0007] The drying chamber has a built-in feeding conveyor belt;

[0008] An air supply box is provided on both sides of the drying box. The upper side wall of the air supply box is connected to the drying box. An air distribution mechanism connected to the air supply mechanism is provided in the upper cavity of the air supply box. The air distribution mechanism is used to supply hot air into the air supply box.

[0009] The dehumidification mechanism has an air inlet end connected to the bottom side wall of the drying box, and a dehumidification end extending from the air supply box and connected to the outside, and is equipped with a dehumidification fan for dehumidification.

[0010] The circulation mechanism includes an axial flow fan located at the bottom of the air supply box, the inlet end of the axial flow fan being connected to the bottom side wall of the drying box, and the outlet end of the axial flow fan being vertically upward.

[0011] The moisture exhaust system and the fresh air supply system are interconnected through a heat exchange box;

[0012] The air supply volume of the air supply mechanism is the same as the air exhaust volume of the dehumidification mechanism.

[0013] Preferably, the dehumidification mechanism includes a dehumidification pipe as an air inlet, the dehumidification pipe is connected to the drying box, and its end is connected to the moisture passage of the heat exchange box, the air outlet of the moisture passage of the heat exchange box is connected to the air inlet of the dehumidification fan.

[0014] Furthermore, the circulation mechanism is located on both sides of the exhaust pipe and is symmetrically arranged about one of the exhaust pipes.

[0015] Furthermore, the air supply mechanism includes a fresh air duct serving as a fresh air path. The air inlet of the fresh air duct is connected to the fresh air passage of the heat exchange box. The air inlet of the fresh air passage of the heat exchange box is located on the side wall of the heat exchange box. The end of the fresh air duct is connected to the combustion furnace via a blower. The air outlet of the combustion furnace is connected to the air distribution mechanism.

[0016] Furthermore, the air distribution mechanism includes an air supply pipe connected to the combustion furnace. The pipe body is located above the drying box, and the air supply pipe is connected to air inlet pipes that extend into the air supply box. The end of the air inlet pipe is connected to a horizontal air distribution pipe. The air distribution pipe is arranged parallel to the horizontal extension direction of the air supply box, and the pipe wall of the air distribution pipe is constructed with a plurality of air outlet holes that communicate with the air supply box.

[0017] Furthermore, the feeding conveyor belt is an S-shaped conveyor belt, with the top conveyor belt serving as the infeed side and the bottom conveyor belt serving as the discharge side.

[0018] Furthermore, the upper side wall of the air supply box is connected to the drying box through an air supply hole, which is located on the upper side of the top mesh belt of the feeding mesh belt.

[0019] This invention has the following beneficial effects in the process of drying materials:

[0020] The material to be dried is dried and conveyed on a feeding conveyor belt. Hot air for drying is first introduced into the air distribution box through the air supply mechanism. The air distribution box acts as a static pressure source, keeping the airflow relatively gentle. Under negative pressure, the hot air in the air distribution box enters the drying chamber from the upper side wall. When the dehumidification mechanism is activated, it draws air directly from the bottom of the drying chamber. This allows the hot air entering from the top of the drying chamber to penetrate the material from top to bottom, drying the material on the feeding conveyor belt. The dried, humid airflow is extracted by the dehumidification mechanism, creating a negative pressure inside the drying chamber relative to the air distribution box, ensuring that the hot air used for drying can penetrate the material from top to bottom for drying. With the airflow from the air supply mechanism and the dehumidification mechanism at the same level, the residual high-temperature air in the drying chamber and the air distribution box can circulate under the action of the circulation mechanism. This circulating flow not only makes the hot air flow in the drying chamber more uniform, preventing the hot air entering the drying chamber from flowing excessively downwards towards the air inlet of the dehumidification mechanism, thus avoiding the situation where the material at the bottom far from the air inlet of the dehumidification mechanism is not effectively dried; at the same time, it can also improve the drying efficiency by promoting the circulation of air, allowing the heat in the drying chamber to be distributed more evenly and quickly.

[0021] Furthermore, by having the humidified air duct of the dehumidification mechanism and the fresh air duct of the air supply mechanism interleave within the heat exchange box, the dried, high-temperature humidified air can transfer most of its heat to the fresh air supply, thereby reducing the energy consumption of the combustion furnace used to heat the fresh air. This achieves the goal of energy conservation and emission reduction. At the same time, by placing the air inlet of the dehumidification mechanism on the lower side of the drying box, even with the heat exchange box installed, space is saved, and the layout is simplified. Attached Figure Description

[0022] Figure 1 This is a front view structural diagram of the present utility model.

[0023] Figure 2 This is a top view of the structure of this utility model.

[0024] Among them, 1-drying box, 2-feeding mesh belt, 3-air supply box, 4-exhaust fan, 5-axial flow fan, 6-heat exchange box, 7-exhaust pipe, 8-fresh air pipe, 9-air supply fan, 10-combustion furnace, 11-air supply pipe, 12-air inlet pipe, 13-distribution pipe. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0027] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0028] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0029] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0030] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0031] Please refer to Figure 1 and Figure 2 As shown, an energy-saving dual-box drying system includes:

[0032] Drying box 1, with built-in feeding mesh belt 2;

[0033] An air supply box 3 is provided on both sides of the drying box 1. The upper side wall of the air supply box 3 is connected to the drying box 1. An air distribution mechanism connected to the air supply mechanism is provided in the upper cavity of the air supply box 3. The air distribution mechanism is used to supply hot air into the air supply box 3.

[0034] The dehumidification mechanism has an air inlet end connected to the bottom side wall of the drying box 1, and a dehumidification end extending from the air supply box 3 to communicate with the outside, and is equipped with a dehumidification fan 4 for dehumidification.

[0035] The circulation mechanism includes an axial flow fan 5 located at the bottom of the air supply box 3. The inlet end of the axial flow fan 5 is connected to the bottom side wall of the drying box 1, and the outlet end of the axial flow fan 5 is vertically upward.

[0036] The moisture exhaust system and the fresh air supply system are heat-conducted and interwoven through the heat exchange box 6.

[0037] The air supply volume of the air supply mechanism is the same as the air exhaust volume of the dehumidification mechanism.

[0038] In this way, the material to be dried is dried and conveyed on the feeding mesh belt 2. Hot air for drying is first introduced into the air distribution box 3 through the air supply mechanism. The air distribution box 3 acts as a static pressure source, keeping the airflow relatively gentle. Under negative pressure, the hot air in the air distribution box 3 enters the drying chamber 1 from the upper side wall of the air distribution box 3. When the dehumidification mechanism is activated, it directly draws air from the bottom of the drying chamber 1. This allows the hot air entering from the top of the drying chamber 1 to penetrate the material from top to bottom, drying the material on the feeding mesh belt 2. The dried, humid airflow is extracted by the dehumidification mechanism, ensuring that the hot air used for drying can penetrate the material from top to bottom while maintaining a negative pressure inside the drying chamber 1 relative to the air distribution box 3. With the airflow from the air supply mechanism and the dehumidification mechanism at the same level, the residual high-temperature air inside the drying chamber 1 and the air distribution box 3 can circulate under the action of the circulation mechanism. This circulating flow not only makes the hot air flow in the drying chamber 1 more uniform, preventing the hot air entering the drying chamber 1 from flowing downwards too much towards the air inlet of the dehumidification mechanism, thus preventing the material at the bottom far from the air inlet of the dehumidification mechanism from being ineffectively dried; at the same time, it can also improve the drying efficiency by promoting the circulation of air, allowing the heat in the drying chamber 1 to be distributed more evenly and quickly.

[0039] Furthermore, by having the humid air duct of the dehumidification mechanism and the fresh air duct of the air supply mechanism interleaved within the heat exchange box 6, the dried, high-temperature humid air can transfer most of its heat to the fresh air in the air supply mechanism, thereby reducing the energy consumption of the combustion furnace used to heat the fresh air. This achieves the goal of energy conservation and emission reduction. At the same time, by placing the air inlet of the dehumidification mechanism on the lower side of the drying box 1, even with the heat exchange box 6 installed, space is saved, and the layout is simplified.

[0040] Specifically, the dehumidification mechanism includes a dehumidification pipe 7 as the air inlet, which is connected to the drying box 1 and its end is connected to the moisture passage of the heat exchange box 6. The air outlet of the moisture passage of the heat exchange box 6 is connected to the air inlet of the dehumidification fan 4.

[0041] Among them, the aforementioned exhaust pipe 7, the moisture passage of the heat exchange box 6, and the built-in air duct of the exhaust fan 4 together constitute the moisture air path.

[0042] Furthermore, in order to better maintain the uniformity of the hot air flow from top to bottom within the drying chamber 1, the circulation mechanism is located on both sides of the exhaust pipe 7 and is symmetrically arranged about one of the exhaust pipes 7.

[0043] This ensures that the hot air inside the drying chamber 1 is subjected to a relatively uniform downward suction force, thereby ensuring that the hot air can penetrate the material evenly from top to bottom and dry the material uniformly.

[0044] Furthermore, the air supply mechanism includes a fresh air duct 8 as a fresh air path. The air inlet end of the fresh air duct 8 is connected to the fresh air passage of the heat exchange box 6. The air inlet end of the fresh air passage of the heat exchange box 6 is located on the side wall of the heat exchange box 6. The end of the fresh air duct 8 is connected to the combustion furnace 10 through a blower 9. The air outlet end of the combustion furnace 10 is connected to the air distribution mechanism.

[0045] In this way, the fresh air that is about to enter the air distribution mechanism first enters the fresh air duct from the side wall of the heat exchange box 6, and then exchanges heat with the hot and humid air in the heat exchange box 6. After carrying some heat, it enters the combustion furnace 10 through the fresh air pipe 8 for heating, and then enters the air distribution mechanism from the combustion furnace 10. It is then evenly distributed into the air supply box 3 by the air distribution mechanism.

[0046] Furthermore, the air distribution mechanism includes an air supply pipe 11 connected to the combustion furnace 10. The pipe body of the air supply pipe 11 is located above the drying box 1, and the air supply pipe 11 is connected to an air inlet pipe 12 that extends into the air supply box 3. The end of the air inlet pipe 12 is connected to a horizontal air distribution pipe 13. The air distribution pipe 13 is arranged parallel to the horizontal extension direction of the air supply box 3, and the pipe wall of the air distribution pipe 13 is constructed with a plurality of air outlet holes that communicate with the air supply box 3.

[0047] Furthermore, the feeding mesh belt 2 is an S-shaped mesh belt, with the top mesh belt of the feeding mesh belt 2 serving as the feeding side and the bottom mesh belt serving as the discharging side.

[0048] Meanwhile, in order to ensure efficient drying, the upper side wall of the air supply box 3 is connected to the drying box 1 through an air supply hole, which is located on the upper side of the top mesh belt of the feeding mesh belt 2.

[0049] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An energy-saving dual-box drying system, characterized in that, include: Drying box (1) with built-in feeding mesh belt (2); An air supply box (3) is provided on both sides of the drying box (1). The upper side wall of the air supply box (3) is connected to the drying box (1). An air distribution mechanism connected to the air supply mechanism is provided in the upper cavity of the air supply box (3). The air distribution mechanism is used to supply hot air into the air supply box (3). The dehumidification mechanism has an air inlet end connected to the bottom side wall of the drying box (1), and a dehumidification end extending from the air supply box (3) to communicate with the outside. It is also equipped with a dehumidification fan (4) for dehumidification. The circulation mechanism includes an axial flow fan (5) located at the bottom of the air supply box (3), the inlet end of the axial flow fan (5) being connected to the bottom side wall of the drying box (1), and the outlet end of the axial flow fan (5) being vertically upward. The moisture exhaust system and the fresh air supply system are heat-conducted and interleaved through the heat exchange box (6); The air supply volume of the air supply mechanism is the same as the air exhaust volume of the dehumidification mechanism.

2. The energy-saving dual-box drying system according to claim 1, characterized in that, The dehumidification mechanism includes a dehumidification pipe (7) as the air inlet, which is connected to the drying box (1) and its end is connected to the moisture passage of the heat exchange box (6). The air outlet of the moisture passage of the heat exchange box (6) is connected to the air inlet of the dehumidification fan (4).

3. The energy-saving dual-box drying system according to claim 2, characterized in that, The circulation mechanism is located on both sides of the exhaust pipe (7) and is symmetrically arranged about one of the exhaust pipes (7).

4. The energy-saving dual-box drying system according to claim 1, characterized in that, The air supply mechanism includes a fresh air duct (8) as a fresh air path. The air inlet end of the fresh air duct (8) is connected to the fresh air passage of the heat exchange box (6). The air inlet end of the fresh air passage of the heat exchange box (6) is located on the side wall of the heat exchange box (6). The end of the fresh air duct (8) is connected to the combustion furnace (10) through a blower (9). The air outlet end of the combustion furnace (10) is connected to the air distribution mechanism.

5. The energy-saving dual-box drying system according to claim 4, characterized in that, The air distribution mechanism includes an air supply pipe (11) connected to the combustion furnace (10). The pipe body of the air supply pipe (11) is located above the drying box (1), and the air supply pipe (11) is connected to an air inlet pipe (12) that extends into the air supply box (3). The end of the air inlet pipe (12) is connected to a horizontal air distribution pipe (13). The air distribution pipe (13) is arranged parallel to the horizontal extension direction of the air supply box (3), and the pipe wall of the air distribution pipe (13) is constructed with a plurality of air outlet holes that communicate with the air supply box (3).

6. The energy-saving dual-box drying system according to claim 1, characterized in that, The feeding mesh belt (2) is an S-shaped mesh belt, with the top mesh belt of the feeding mesh belt (2) being the feeding side and the bottom mesh belt being the discharging side.

7. The energy-saving dual-box drying system according to claim 6, characterized in that, The upper side wall of the air supply box (3) is connected to the drying box (1) through an air supply hole, which is located on the upper side of the top mesh belt of the feeding mesh belt (2).

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