A drying room with circulating air duct

Abstract

This utility model relates to the field of drying room equipment technology, specifically to a drying room with a circulating air duct, including a main body of the drying room. The main body of the drying room is divided into two rows of drying chambers by a partition located in the middle, and a heat dissipation system plate for air circulation between the two rows of drying chambers is respectively arranged on both sides of the partition. Each row of drying chambers is equipped with a fan wall, and the air inlet and outlet directions of the fan walls in the two rows of drying chambers are opposite and are located on one side of the heat dissipation system plate. This utility model forms a physical air duct partition by separating the two drying chambers by the partition, and constructs a bidirectional convection system to realize air exchange between the chambers by combining the fan walls arranged in opposite directions. The combination of fan walls independently configured in each chamber but with opposite airflow directions realizes the horizontal closed-loop airflow organization in the drying room, so that the hot air forms a penetrating flow between the materials, fundamentally solving the problems of dead corners and temperature stratification at the edges of traditional drying rooms.

Description

Technical Field

[0001] This utility model relates to the field of drying room equipment technology, specifically to a drying room with a circulating air duct. Background Technology

[0002] In fireworks production, drying chambers are widely used in the drying process of various materials, and their performance directly affects product quality and energy efficiency. Currently, mainstream hot air circulating drying chambers rely on fans to drive hot air through a closed space, achieving heat transfer and moisture evaporation through forced convection. However, existing drying chamber equipment still faces significant technical bottlenecks in terms of airflow uniformity, thermal efficiency, and spatial layout rationality. Especially in large industrial drying chambers, uneven hot air circulation leading to localized temperature differences has become a key factor restricting product quality improvement. Numerous patent documents indicate that although the industry has proposed various improvement solutions, controlling the internal temperature uniformity of the drying chamber and designing efficient circulating air ducts remain the core technical challenges.

[0003] For example, in Chinese utility model patent CN204987791 U, entitled "An External Circulation Air Path Structure," a design is disclosed that includes an oven chamber installed inside an oven, each chamber equipped with an external circulation system, a heating system, and a temperature control system. The heating system includes a stainless steel heating element. The external circulation system includes one or more partitions, forming an air outlet channel with openings at the top and bottom. A circulating fan is installed at the lower left end of the oven chamber, and a dual hot air circulation system is installed above the circulating fan. The circulating fan has an air outlet and a return air outlet. An air outlet duct is connected to the upper end of the air outlet, with the outlet located at the upper end of the oven chamber and the return air outlet located at the lower end of the oven chamber.

[0004] The above solution has a simple structure, installing an external circulation air duct inside a traditional drying oven. During use, temperature control is simpler and more intelligent, with higher safety performance, and it intelligently adjusts according to the oven's internal temperature.

[0005] However, in reality, because the aforementioned drying equipment relies solely on a single circulating fan to drive the airflow, the hot air enters the cavity from the top and then naturally sinks. This unidirectional flow pattern easily causes airflow short-circuiting, meaning that the hot air preferentially flows along the path of least resistance, resulting in significant differences in airflow velocity between the corners and the center of the drying equipment. In some large drying equipment, the temperature deviation at different locations can reach more than 15°C, severely affecting the consistency of material drying.

[0006] Therefore, a drying oven with a circulating air duct is proposed to solve the above-mentioned problems. Utility Model Content

[0007] Technical problems to be solved

[0008] In view of the above-mentioned shortcomings of the existing technology, the present invention provides a drying room with a circulating air duct, which can effectively solve the problem of temperature difference inside the drying equipment in the existing technology.

[0009] Technical solution

[0010] To achieve the above objectives, this utility model provides the following technical solution:

[0011] This utility model provides a drying room with a circulating air duct, including a drying room body. The drying room body is divided into two rows of drying chambers by a partition in the middle. A heat dissipation system plate for air circulation between the two rows of drying chambers is provided on both sides of the partition. A fan wall is provided in each row of drying chambers. The air inlet and outlet directions of the fan walls in the two rows of drying chambers are opposite and they are located on one side of the heat dissipation system plate.

[0012] Furthermore, a heat exchanger is provided on the outside of the main body of the drying room. The air inlet of the heat exchanger is connected to the outside, and its air outlet is connected to one of the drying chambers.

[0013] Furthermore, the heat exchanger is also equipped with a moisture recovery pipe, which is connected to one of the drying chambers and is used to draw the humid air in the drying chamber into the heat exchanger for drying.

[0014] Furthermore, the height of the inlet of the moisture recovery pipe is lower than the height of the air outlet of the heat exchanger.

[0015] Furthermore, each of the fan walls is equipped with several fans for guiding the direction of gas flow, and the fans are arranged in pairs on the fan wall.

[0016] Furthermore, the size of the row of fans located below the fan wall is larger than the size of the fans above it.

[0017] Furthermore, a door that is electrically operated is provided in the middle of the partition between the two rows of drying chambers and at the outer end of one of the rows of drying chambers.

[0018] Furthermore, a filter screen is provided at the end of the heat dissipation system plate away from the adjacent fan wall.

[0019] Furthermore, the heat dissipation system plate is provided with curved pipes for heat source circulation.

[0020] Furthermore, the heat dissipation system plate has multiple arrayed air outlets on one end face near the adjacent fan wall, and each air outlet is tilted towards the side away from the adjacent fan wall.

[0021] Beneficial effects

[0022] The technical solution provided by this utility model, compared with the known public technology, has the following advantages:

[0023] Beneficial effects:

[0024] This invention creates physical air duct partitions by separating two drying chambers with a partition, and constructs a bidirectional convection system with fan walls arranged in opposite directions to achieve air exchange between chambers. Each chamber is independently configured with fan wall combinations with opposite airflow directions, realizing a closed-loop airflow organization in the horizontal direction within the drying chamber. This allows hot air to form a penetrating flow between materials, fundamentally solving the problems of dead corners and temperature stratification at the edges of traditional drying chambers. At the same time, the heat remaining in the residual air inside the chamber can also be reused, reducing energy consumption. Attached Figure Description

[0025] 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 of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the overall structure of the drying chamber in an embodiment of this utility model;

[0027] Figure 2 This is a top view schematic diagram of the airflow direction in the drying chamber according to an embodiment of the present invention;

[0028] Figure 3 This is a schematic diagram of the top cross-sectional structure of the heat dissipation system plate in an embodiment of this utility model;

[0029] Figure 4 This is a side view cross-sectional diagram of the heat dissipation system plate in an embodiment of this utility model.

[0030] The labels in the diagram represent:

[0031] 1. Main body of the drying room; 10. Partition; 101. Heat dissipation system plate; 1011. Filter screen; 1012. Curved pipe; 1013. Air outlet; 11. Door; 2. Drying chamber; 21. Fan wall; 211. Fan; 3. Heat exchanger; 31. Moisture recovery pipe. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0033] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between 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.

[0034] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above, diagonally above, or on the surface of the second feature, indicating that the second feature is supported and fixed by the first feature, or simply indicating that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicating that the first feature is at a lower horizontal level than the second feature.

[0035] In the description of this embodiment, the terms "upper," "lower," "left," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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" and "second" are only used for distinction in description and have no special meaning.

[0036] The present invention will be further described below with reference to the embodiments.

[0037] Example:

[0038] See attached document Figure 1-4 This utility model relates to a drying oven with a circulating air duct, including a main body 1, the core structure of which is as follows: Figure 1 As shown, the main body 1 of the drying chamber is welded from double-layer insulated steel plates, with internal dimensions of 4.6m × 8.85m × 2.075m. A partition 10 (80mm thick rock wool insulation board) is vertically installed at the longitudinal center of the drying chamber. The partition 10 located in the middle of the drying chamber divides the main body 1 of the drying chamber into two rows of drying chambers 2, dividing the internal space of the main body 1 into two independent rows of drying chambers 2, on the left and right.

[0039] On each of the two side walls of the partition 10, a heat dissipation system plate 101 is installed. The plate uses a stainless steel frame with an embedded aluminum finned tube assembly, and an S-shaped curved tube 1012 is arranged inside as a heat medium channel.

[0040] Each drying chamber 2 is equipped with a fan wall 21, and the fan walls 21 in the two drying chambers 2 have opposite air inlet and outlet directions and are located on one side of the heat dissipation system plate 101 respectively.

[0041] One fan wall 21 is equipped with 6 axial flow fans 211. In actual use, the number of fans 211 can be adjusted according to the actual size of the drying room. The blade angle on one fan wall 21 is set to deliver air towards the partition 10. The fan wall 21 on the other side of the drying room is also equipped with 6 fans of the same model, but the blades are installed in the opposite direction to achieve the exhaust action (e.g., Figure 2 (As indicated by the airflow arrow).

[0042] The fans are arranged in three rows: two large fans are installed in the bottom row and four small fans are installed in the top two rows. This design is designed to compensate for the downward force of the airflow by increasing the bottom air pressure, which is designed to make up for the rising characteristics of hot air.

[0043] With attachment Figure 2 In the example, the areas corresponding to the two drying chambers are drying chamber A (…). Figure 2 (below) and drying chamber B ( Figure 2 (Above) During initial operation, heat exchanger 3 injects hot air into drying chamber B. This hot air is directed towards one of the heat dissipation system plates 101, and the adjacent fan wall 21 creates a suction effect. This suction effect drives the hot air through the heat dissipation system plate 101 into drying chamber A. The hot air is then drawn back across the material by the forward-moving fan of the other fan wall 21 into drying chamber B, and finally returns to drying chamber A through the initial heat dissipation system plate 101, forming a closed-loop airflow.

[0044] It should be noted that a moisture recovery pipe 31 is connected to the bottom of the heat exchanger 3, and the height of its opening is lower than the air outlet of the heat exchanger. When the humidity inside the drying chamber B rises to a set threshold, the moisture recovery pipe 31 automatically draws in the high-humidity air from the drying chamber B, dehumidifies and reheats it through the heat exchanger 3, and then re-injects it into the drying chamber B. Since the drawn-out air contains a certain temperature, the heating time during re-injection is shorter than that of directly drawing in outside air, consuming less energy and making it more environmentally friendly and energy-saving.

[0045] The drying room is equipped with two electric sliding doors 11 at the control end. One door is located in the middle of the partition 10 (connecting the two chambers), and the other door is located at the outer end of drying chamber A. When the door is opened, the system automatically shuts down the fan in the corresponding area to prevent airflow turbulence.

[0046] Several conical air outlets 1013 are opened on one end face of the heat dissipation system plate 101 facing the drying chamber 2, and all air outlets are uniformly inclined outward (e.g., Figure 3 (As shown in the enlarged view), it is used to guide the heat flow to diffuse along the side wall of the drying chamber and away from the air inlet of the fan on the fan wall 21, thus prolonging the airflow time.

[0047] A removable filter 1011 is installed on the side of the fan wall 21 away from the fan wall to intercept fibrous impurities in the airflow.

[0048] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of this utility model.

Claims

1. A drying room with a circulating air duct, characterized in that, The drying room includes a main body (1), which is divided into two rows of drying chambers (2) by a partition (10) located in the middle of the main body (1), and a heat dissipation system plate (101) for air circulation between the two rows of drying chambers (2) is provided on both sides of the partition (10). Each drying chamber (2) is equipped with a fan wall (21), and the fan walls (21) in the two drying chambers (2) have opposite air inlet and outlet directions and are located on one side of the heat dissipation system plate (101).

2. A drying oven with a circulating air duct according to claim 1, characterized in that, A heat exchanger (3) is provided on the outside of the main body (1) of the drying room. The air inlet of the heat exchanger (3) is connected to the outside, and its air outlet is connected to one of the drying chambers (2).

3. A drying oven with a circulating air duct according to claim 2, characterized in that, The heat exchanger (3) is also provided with a moisture recovery pipe (31), which is connected to one of the drying chambers (2) and is used to draw the humid air in the drying chamber (2) into the heat exchanger (3) for drying.

4. A drying oven with a circulating air duct according to claim 3, characterized in that, The height of the inlet of the moisture recovery pipe (31) is lower than the height of the outlet of the heat exchanger (3).

5. A drying oven with a circulating air duct according to claim 1, characterized in that, Each fan wall (21) is provided with a number of fans (211) for guiding the direction of gas flow, and the fans (211) are arranged in pairs on the fan wall (21).

6. A drying oven with a circulating air duct according to claim 5, characterized in that, The size of the row of fans (211) arranged above and below the fan wall (21) is larger than the size of the fan (211) above.

7. A drying oven with a circulating air duct according to claim 1, characterized in that, A door (11) that is electrically opened and closed is provided in the middle of the partition between the two rows of drying chambers (2) and at the outer end of one of the rows of drying chambers (2).

8. A drying oven with a circulating air duct according to any one of claims 1-7, characterized in that, A filter (1011) is provided at the end of the heat dissipation system plate (101) away from the adjacent fan wall (21).

9. A drying oven with a circulating air duct according to any one of claims 1-7, characterized in that, The heat dissipation system plate (101) is provided with a curved pipe (1012) for heat source circulation.

10. A drying oven with a circulating air duct according to any one of claims 1-7, characterized in that, The heat dissipation system plate (101) has multiple arrayed air outlets (1013) on one end face near the adjacent fan wall (21), and each air outlet (1013) is inclined in the direction away from the adjacent fan wall (21).

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