Circulating air path structure of drying machine

Abstract

The utility model provides a circulating air path structure of a drying machine, which can reduce an airflow vortex area of equipment, improve the uniformity of air distribution, reduce air resistance, enable the temperature in the equipment to be uniformly distributed, and ensure the moisture uniformity of a finished product. The air path structure is composed of a plurality of temperature areas, each temperature area comprises a heat exchange air cavity and a drying air cavity, a heat exchanger is installed in each heat exchange air cavity, a material layer is arranged in each drying air cavity, and an outlet of each heat exchange air cavity is communicated with a first air inlet of a first circulating air duct and a second air inlet of a second circulating air duct. The first circulating air duct and the second circulating air duct are arranged in the drying air cavity side by side, an air blocking device is arranged between the first circulating air duct and the second circulating air duct, the first circulating air duct and the second circulating air duct penetrate through the material layer, the first air inlet is located below the material layer, the second air inlet is located above the material layer, and a first air outlet of the first circulating air duct is located above the material layer. An air outlet II of the circulating air duct II is positioned below the material layer; and the air outlet I and the air outlet II are respectively communicated with the heat exchange air cavity.

Description

Technical Field

[0001] This utility model relates to the field of dryer technology, specifically to a circulating air path structure for a dryer. Background Technology

[0002] The airflow system of horizontal dryers (dryers) is widely used in drying equipment for aquatic pellet feed and pet food. As a drying equipment that uses hot air as the drying medium, the utilization rate of hot air heat is crucial to the efficiency and energy consumption of the drying equipment. A reasonable airflow system can effectively improve the utilization rate of hot air, reduce equipment energy consumption, and improve the drying effect.

[0003] The current shortcomings of the airflow system of horizontal dryers (such as the drying chamber and air duct used in a heat-circulating wood board drying kiln disclosed in patent publication number CN214842132U) are that there is mostly a single-path circulating air in a single temperature zone, which easily forms an airflow vortex at the rear end of the material layer. The longer the temperature zone, the larger the vortex influence area. At the same time, the wind speed is low in the central area of ​​the vortex, and the amount of air passing through the material layer is small, resulting in poor drying effect in the vortex area and poor overall material drying moisture uniformity. Utility Model Content

[0004] To address the problem that existing dryers' airflow paths easily form airflow vortices that affect drying efficiency, this invention provides a circulating airflow path structure for a dryer. This structure reduces airflow vortex areas, improves the uniformity of airflow distribution, lowers air resistance, and ensures uniform temperature distribution inside the equipment, thereby guaranteeing uniform moisture content in the finished product.

[0005] The technical solution is as follows: a circulating air path structure for a dryer, comprising multiple temperature zones, each including a heat exchange air chamber and a drying air chamber. A heat exchanger is installed in the heat exchange air chamber, and a material layer is provided in the drying air chamber. The heat exchange air chamber's outlet is connected to both the inlet of circulating air duct one and the inlet of circulating air duct two. Circulating air duct one and circulating air duct two are arranged side-by-side within the drying air chamber, with a baffle device between them. Circulating air duct one and circulating air duct two pass through the material layer. Inlet one is located below the material layer, and inlet two is located above the material layer. Outlet one of circulating air duct one is located above the material layer, and outlet two of circulating air duct two is located below the material layer. Outlet one and outlet two are connected to the heat exchange air chamber.

[0006] Furthermore, the heat exchange air chamber is located above the drying air chamber, and a fan is installed at the outlet of the heat exchange air chamber. The fan outlet is connected to the first air inlet and the second air inlet.

[0007] Furthermore, the fan outlet is connected to the air inlet 1 and the air inlet 2 via a connecting air cavity 1. The two sides of the connecting air cavity 1 are respectively provided with connecting air cavity 2 and connecting air cavity 3 via partitions. The connecting air cavity 2 is used to connect the air outlet 1 and the air inlet 1 of the heat exchange air cavity, and the connecting air cavity 3 is used to connect the air outlet 2 and the air inlet 2 of the heat exchange air cavity.

[0008] Furthermore, a filter device is installed at both the first and second air inlets of the heat exchange air chamber.

[0009] Beneficial effects: By setting up two circulating air ducts in the same temperature zone, with one duct passing through the material layer from bottom to top and the other from top to bottom, the airflow can be reversed within the same temperature zone. Compared with using only a single circulating air duct, this air duct system can reduce the airflow vortex area of ​​the equipment, improve the uniformity of air volume distribution, reduce wind resistance, make the internal temperature distribution of the equipment uniform, and ensure the uniformity of the moisture content of the finished product. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of a single temperature zone structure of the present invention (excluding the outer shell and the side and top access door);

[0011] Figure 2 This is a schematic diagram of the front layout of a single temperature zone of this utility model (excluding the outer shell and the side and top access door);

[0012] Figure 3 This is a schematic diagram of the heat exchange air cavity;

[0013] Figure 4 This is a schematic diagram showing the location of the first circulating air duct;

[0014] Figure 5 This is a schematic diagram showing the location of the second circulating air duct. Detailed Implementation

[0015] A dryer's circulating air path structure consists of multiple temperature zones, such as... Figures 1-5 Each temperature zone shown includes a heat exchange air chamber A and a drying air chamber B, combined with... Figure 3 A heat exchanger 1 is installed in heat exchange air chamber A, and a material layer 2 is provided in drying air chamber B. Figure 2 The outlet of heat exchange chamber A is connected to the air inlet 100 of circulating air duct one and the air inlet 200 of circulating air duct two. Circulating air duct one and circulating air duct two are arranged side by side in drying chamber B, and a baffle device is provided between them. Material layer 2 can pass through the baffle device. Figure 4 , Figure 5Air inlet 100 is located below material layer 2, air inlet 200 is located above material layer 2, air outlet 101 of circulating air duct 1 is located above material layer 2, and air outlet 201 of circulating air duct 2 is located below material layer 2. This arrangement allows hot air in circulating air duct 1 to pass through material layer 2 from bottom to top, and hot air in circulating air duct 2 to pass through material layer 2 from top to bottom. Air outlet 101 and air outlet 201 are respectively connected to heat exchange air chamber A.

[0016] Specifically, heat exchange air chamber A is located above drying air chamber B. A fan 3 is installed at the outlet of heat exchange air chamber A, and the fan outlet is connected to air inlet 100 and air inlet 200. More specifically, the fan outlet is connected to air inlet 100 and air inlet 200 via connecting air chamber one. Connecting air chamber one has connecting air chamber two and connecting air chamber three on both sides via partitions 4. Connecting air chamber two connects air outlet 101 to heat exchange air chamber inlet 300, and connecting air chamber three connects air outlet 201 to heat exchange air chamber inlet 301. To prevent materials and debris from entering heat exchange air chamber A, filter devices 5 are installed at heat exchange air chamber inlet 300 and heat exchange air chamber inlet 301.

[0017] In operation, the material is located in material layer 2 and passes horizontally through the horizontal dryer. Each temperature zone of the dryer is equipped with a circulating air duct 1 and a circulating air duct 2 in parallel. Hot air is blown out by the fan 3 and enters the connecting air chamber, thus entering the air inlet 100 of circulating air duct 1 and the air inlet 200 of circulating air duct 2. The hot air in circulating air duct 1 blows from bottom to top through material layer 2 and is discharged through air outlet 101 into connecting air chamber 2. Then it enters heat exchange air chamber A through the air inlet of heat exchange air chamber. The hot air in circulating air duct 2 blows from top to bottom through material layer 2 and is discharged through air outlet 201 into connecting air chamber 3. Then it enters heat exchange air chamber A through the air inlet of heat exchange air chamber, thus achieving reciprocating circulation.

[0018] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the scope of protection of this utility model. Therefore, the scope of protection of this utility model should be determined by the scope of the claims.

Claims

1. A circulating air path structure for a dryer, comprising multiple temperature zones, each temperature zone including a heat exchange air chamber and a drying air chamber, wherein a heat exchanger is installed in the heat exchange air chamber, and a material layer is provided in the drying air chamber, characterized in that: The outlet of the heat exchange air chamber is connected to the air inlet 1 of the first circulating air duct and the air inlet 2 of the second circulating air duct. The first circulating air duct and the second circulating air duct are arranged side by side in the drying air chamber and a baffle device is provided between them. The first circulating air duct and the second circulating air duct pass through the material layer. The first air inlet is located below the material layer, and the second air inlet is located above the material layer. The first air outlet of the first circulating air duct is located above the material layer, and the second air outlet of the second circulating air duct is located below the material layer. The first air outlet and the second air outlet are connected to the heat exchange air chamber.

2. The circulating air path structure of a dryer according to claim 1, characterized in that: The heat exchange air chamber is located above the drying air chamber, and a fan is installed at the outlet of the heat exchange air chamber. The fan outlet is connected to the first air inlet and the second air inlet.

3. The circulating air path structure of a dryer according to claim 2, characterized in that: The fan outlet is connected to the air inlet 1 and the air inlet 2 via a connecting air cavity 1. The two sides of the connecting air cavity 1 are respectively provided with connecting air cavity 2 and connecting air cavity 3 via partitions. The connecting air cavity 2 is used to connect the air outlet 1 and the air inlet 1 of the heat exchange air cavity, and the connecting air cavity 3 is used to connect the air outlet 2 and the air inlet 2 of the heat exchange air cavity.

4. The circulating air path structure of a dryer according to claim 3, characterized in that: A filter device is installed at both the first and second air inlets of the heat exchange chamber.

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