A structure of circulating hot air pipeline of multiple rapid drying kilns

Abstract

The utility model discloses a plurality of quick drying kiln circulating hot air pipeline structure, a plurality of drying kiln are arranged side by side along the front -back direction, including heat supply circulating fan, exhaust pipe, heat supply pipe, dehumidification pipe and dehumidification fan, exhaust pipe is along the front -back direction extension setting of a plurality of drying kiln, and exhaust pipe is communicated with the inside of a plurality of drying kiln through the exhaust port of drying kiln respectively, and exhaust pipe is communicated with heat supply pipe, and exhaust pipe is still connected with dehumidification fan through dehumidification pipe, heat supply circulating fan is connected with heat supply pipe, and heat supply pipe is along the front -back direction extension setting of a plurality of drying kiln, and heat supply pipe is communicated with the inside of a plurality of drying kiln through the gas inlet of drying kiln respectively. Through with heat supply circulating fan, exhaust pipe, heat supply pipe and dehumidification pipe centralized arrangement in drying kiln outside, and using unified pipeline connection a plurality of drying kiln, reduce the number of fan, thereby reduce equipment energy consumption and manufacturing cost, simplify operation maintenance process, promote kiln temperature uniformity, have remarkable practicality and economy.

Description

Technical Field

[0001] This utility model relates to the field of drying kiln technology, and in particular to a circulating hot air pipeline structure for multiple rapid drying kilns. Background Technology

[0002] In modern industrial production, multi-layer rapid drying kilns are core drying equipment widely used in ceramics, building materials, refractory materials and other fields. Currently, conventional multi-layer rapid drying kilns are usually designed with 3 to 9 layers. Their overall structure is composed of multiple standardized box units horizontally spliced ​​together. The specific number of box units is mainly determined by the designed output of the product.

[0003] In existing drying kilns of this type, each unit is equipped with an independent heating and circulating fan system. Its working principle is as follows: the heating and circulating fan draws low-temperature, high-humidity air from inside the drying kiln and processes it in two parts. One part of the air is sent to a heating air box for recycling, where it mixes and is heated with the high-temperature waste heat air introduced from the kiln before being sent back into the drying kiln to dry the products. The remaining low-temperature, humid air is discharged from the kiln through a centralized dehumidification main duct by a dehumidification fan to maintain a suitable humidity environment inside the kiln.

[0004] However, this standardized "one box, one machine" design has several significant drawbacks. First, the number of housing units directly determines the number of heating circulation fans installed, resulting in a large number of fans for high-volume production lines. These fans operate continuously for 24 hours in the drying kiln, accumulating enormous electrical energy consumption, making them one of the main energy-consuming components in the production process and leading to high operating costs. Second, each heating circulation fan corresponds to a specific motor, control system, and installation structure, and the increased number of fans directly drives up the overall equipment manufacturing cost of the drying kiln. Furthermore, in terms of production operation and maintenance, staff need to monitor the operating status of multiple fans simultaneously, including their start-up, shutdown, vibration, temperature rise, and abnormal noises. This not only increases operational complexity but also significantly increases the workload and monitoring difficulty for production personnel, posing a risk that failure to detect a single fan malfunction in a timely manner could affect the overall drying quality or even cause a kiln shutdown. Utility Model Content

[0005] In response to the problems raised in the background technology, the purpose of this utility model is to propose a pulley mold that solves the problem that each box unit of the existing multi-layer rapid drying kiln needs to be independently equipped with a heating and circulating fan system, which leads to a linear increase in the number of fans in the production line with the number of boxes, resulting in high energy consumption during equipment operation.

[0006] To achieve this objective, the present invention adopts the following technical solution: A circulating hot air pipeline structure for multiple rapid drying kilns, wherein multiple drying kilns are arranged side by side in a front-to-back direction, including a heating circulating fan, an exhaust pipe, a heating pipe, a dehumidification pipe, and a dehumidification fan, wherein the heating circulating fan, exhaust pipe, heating pipe, dehumidification pipe, and dehumidification fan are all located outside the drying kiln. The exhaust pipe extends along the front-back direction of the plurality of drying kilns. The exhaust pipe is connected to the interior of the plurality of drying kilns through the exhaust port of the drying kiln. The exhaust pipe is connected to the heating pipe. The exhaust pipe is also connected to the dehumidifying fan through the dehumidifying pipe. The heating circulation fan is connected to the heating pipe, which extends along the front and rear direction of the plurality of drying kilns. The heating pipe is connected to the interior of the plurality of drying kilns through the air supply port of the drying kiln.

[0007] Preferably, the dehumidification pipe includes a main dehumidification pipe and several branch dehumidification pipes; The dehumidification main pipe extends along the front-back direction of the plurality of drying kilns, and the dehumidification main pipe and the exhaust pipe are connected through the dehumidification branch pipe. The connection port of each of the dehumidification branch pipes and the exhaust pipes is located near the exhaust port of each of the drying kilns.

[0008] Preferably, a first control valve is provided at the connection between the dehumidification branch pipe and the exhaust pipe.

[0009] Preferably, the heating pipe is located at the top of the drying kiln, and the heating pipe includes a main heating pipe and several heating distribution pipes; The main heating pipe extends along the front-back direction of the plurality of drying kilns, and the heating distribution pipe extends along the left-right direction of the drying kiln. Several heating distribution pipes are respectively located on the left and right sides of the main heating pipe, and the main heating pipe is connected to the interior of the drying kiln through the heating distribution pipes.

[0010] Preferably, the heating distribution duct includes a left heating distribution duct and a right heating distribution duct; The left heating distribution duct is located on the left side of the main heating duct, and the left heating distribution duct is connected to the air supply port located at the top left side. The right heating distribution duct is located on the right side of the main heating duct, and the right heating distribution duct is connected to the air supply port located at the top right side. Each of the drying kilns shall have at least one left heating air distribution pipe and one right heating air distribution pipe, wherein the axis of the left heating air distribution pipe and the axis of the right heating air distribution pipe are staggered in the front-to-back direction.

[0011] Preferably, it also includes an in-kiln heating pipe, which is connected to both the heating pipe and the roller kiln.

[0012] Preferably, it also includes a heating air box, which is provided with a first air inlet, a second air inlet, and a manifold exhaust outlet; The first air inlet is connected to the exhaust pipe, the second air inlet is connected to the kiln heating pipe, and the exhaust port is connected to the heating circulation fan.

[0013] Preferably, the heating air box is located at the center of the top of a plurality of drying kilns arranged side by side in the front-to-back direction, the heating air box is provided with two first air inlets, and the number of exhaust pipes is two; One of the exhaust pipes is disposed at the front of the heating air box, and the exhaust pipe is connected to a first air inlet. Another exhaust pipe is disposed at the rear of the heating air box, and the exhaust pipe is connected to another first air inlet.

[0014] Preferably, a second control valve is provided at the connection between the exhaust pipe and the first air inlet.

[0015] Compared with the prior art, one of the above technical solutions has the following beneficial effects: By centrally installing the heating circulating fan, exhaust pipe, heating pipe and dehumidification pipe outside the drying kiln, and connecting multiple drying kilns with a unified pipeline, the number of fans is reduced, thereby reducing equipment energy consumption and manufacturing costs, simplifying operation and maintenance procedures, and improving the temperature uniformity inside the kiln, which has significant practicality and economy. Attached Figure Description

[0016] Figure 1 This is a side view of one embodiment of the present invention; Figure 2 This is a top view of one embodiment of the present invention; Figure 3 This is a schematic diagram of the dehumidification pipeline of this utility model (excluding the heating pipeline). Figure 4 This is a schematic diagram of the heating pipeline of this utility model (excluding the dehumidification pipeline). Figure 5 This is a structural schematic diagram of one embodiment of the heating air box of this utility model.

[0017] The system includes: a heating circulating fan 1, an exhaust pipe 2, a heating pipe 3, a main heating pipe 31, a heating branch pipe 32, a left heating branch pipe 321, a right heating branch pipe 322, a dehumidification pipe 4, a main dehumidification pipe 41, a branch dehumidification pipe 42, a dehumidification fan 5, a first control valve 61, a second control valve 62, a kiln-in-heating pipe 7, a heating air box 8, a first air inlet 81, a second air inlet 82, a combined exhaust port 83, a drying kiln 0, an exhaust port 01, and an air supply port 02. Detailed Implementation

[0018] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0019] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only 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.

[0020] Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," and "third" may explicitly or implicitly include one or more of that feature.

[0021] It should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections 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.

[0022] The following is in conjunction with the appendix Figures 1 to 5 The technical solution of this utility model will be further illustrated through specific implementation methods.

[0023] A circulating hot air pipeline structure for multiple rapid drying kilns, wherein multiple drying kilns 0 are arranged side by side in the front-to-back direction, including a heating circulating fan 1, an exhaust pipe 2, a heating pipe 3, a dehumidification pipe 4, and a dehumidification fan 5, wherein the heating circulating fan 1, the exhaust pipe 2, the heating pipe 3, the dehumidification pipe 4, and the dehumidification fan 5 are all located outside the drying kiln 0. The exhaust pipe 2 extends along the front and rear direction of the plurality of drying kilns 0. The exhaust pipe 2 is connected to the interior of the plurality of drying kilns 0 through the exhaust port 01 of the drying kiln 0. The exhaust pipe 2 is connected to the heating pipe 3. The exhaust pipe 2 is also connected to the dehumidifying fan 5 through the dehumidifying pipe 4. The heating circulation fan 1 is connected to the heating pipe 3, which extends along the front and rear direction of the plurality of drying kilns 0. The heating pipe 3 is connected to the interior of the plurality of drying kilns 0 through the air supply port 02 of the drying kiln 0.

[0024] This utility model provides a circulating hot air pipeline structure for multiple rapid drying kilns. Multiple drying kilns (0) are arranged side-by-side in a front-to-back direction. The structure includes a heating circulating fan 1, an exhaust pipe 2, a heating pipe 3, a dehumidification pipe 4, and a dehumidification fan 5. All of these components are located outside the drying kilns (0). The heating circulating fan 1 is the power device driving the hot air circulation; its external installation facilitates centralized maintenance. The exhaust pipe 2 collects the exhaust gases from the multiple drying kilns (0), achieving centralized treatment of waste heat from multiple kilns through its layout extending along the arrangement direction of the drying kilns (0). The heating pipe 3 transports heated air, extending in the same direction as the arrangement of the drying kilns (0) to optimize hot air distribution efficiency. The dehumidification pipe 4 removes excess moisture from inside the drying kilns (0).

[0025] Specifically, when multiple drying kilns 0 operate side-by-side, the humid and hot air generated inside each kiln enters the shared exhaust pipe 2 through the exhaust port 01, and then enters the heating pipe 3 through the exhaust pipe 2. Driven by the heating circulation fan 1, it mixes with the supplementary heat and re-enters each drying kiln 0, forming a hot air circulation system. The heating pipe 3, through its layout extending along the arrangement direction of the drying kilns 0, evenly distributes the hot air to the air supply ports 02 of each drying kiln, ensuring a stable supply of hot air to the multiple drying kilns 0. Since the main function of the drying kiln 0 is to dry the moisture in the brick blanks, achieving the desired drying effect, and because hot air is used for drying, the hot air becomes humid air containing water vapor after entering the drying kiln 0. Therefore, during the drying process, it is necessary to continuously discharge the moisture outside the drying kiln to achieve a continuous drying effect; otherwise, the moisture inside the kiln will increase until it reaches saturation, at which point the moisture inside the brick blanks cannot be discharged further, and the drying kiln 0 will cease to function. The remaining humid air inside the drying kiln 0 is discharged by the dehumidifying fan 5 through the exhaust pipe 2 and the dehumidifying pipe 4, achieving humidity balance control inside the drying kiln 0.

[0026] To further explain, this utility model achieves hot air resource sharing among multiple drying kilns through an external centralized pipeline system. In existing technologies, each rapid drying kiln requires an independently configured heating circulation system; this is integrated into a single heating circulation fan and optimized pipeline to reduce redundant equipment configuration. Regarding humidity control, the diversion design of the exhaust pipe 2 enables coordinated management of circulating hot air and discharged moisture, avoiding the complex configuration of multiple independent humidity control systems. This solution effectively reduces the total energy consumption of the drying kiln group, reduces the number of hardware configurations for the heating circulation system, and simplifies equipment monitoring and maintenance processes during daily operation. Furthermore, the centralized layout of the hot air circulation pipeline improves thermal energy utilization efficiency, and the coordinated humidity control among multiple drying kilns enhances the stability of system operation, providing a reliable guarantee for large-scale continuous production.

[0027] Furthermore, the dehumidification pipe 4 includes a main dehumidification pipe 41 and several branch dehumidification pipes 42; The dehumidification main pipe 41 extends along the front-back direction of the plurality of drying kilns 0, and the dehumidification main pipe 41 and the exhaust pipe 2 are connected through the dehumidification branch pipe 42. The connection port of each of the dehumidification branch pipes 42 and the exhaust pipe 2 is close to the exhaust port 01 of each of the drying kilns 0.

[0028] The dehumidification main pipe 41 refers to a pipe structure extending along the arrangement direction of multiple drying kilns 0, used to centrally collect and transport the moisture discharged from multiple drying kilns 0. The dehumidification branch pipe 42 is a branch pipe used to connect the exhaust pipe 2 and the dehumidification main pipe 41. Each dehumidification branch pipe 42 is matched with one drying kiln 0. The connection port of the dehumidification branch pipe 42 and the exhaust pipe 2 is close to the exhaust port 01 of each drying kiln 0, which can directionally and quickly draw the moisture of the drying kiln 0 into the dehumidification main pipe 41, shortening the flow distance of the moisture in the exhaust pipe 2.

[0029] To further explain, the main dehumidification pipe 41 extends along the arrangement direction of the drying kilns 0, covering all drying kilns 0. The exhaust pipe 2 is connected to the main dehumidification pipe 41 via dehumidification branch pipes 42. Since the connection points of the dehumidification branch pipes 42 and the exhaust pipe 2 are adjacent to the exhaust ports 01 of each drying kiln, moisture is directly extracted to the main dehumidification pipe 41, avoiding condensation caused by temperature drops during long-distance flow in the exhaust pipe 2. Simultaneously, the independent connection design of each dehumidification branch pipe 42 prevents airflow interference caused by the mixing of moisture from different drying kilns 0 within the exhaust pipe 2, ensuring that the moisture extraction path for each drying kiln 0 is independent and the resistance is balanced. The centralized dehumidification method of the main dehumidification pipe 41 reduces pressure loss caused by multiple branches in the decentralized pipeline, thereby reducing the energy consumption of the dehumidification fan 5.

[0030] Furthermore, a first control valve 61 is provided at the connection between the dehumidification branch pipe 42 and the exhaust pipe 2.

[0031] The first control valve 61 refers to the flow regulation device installed at the connection node between the dehumidification branch pipe 42 and the exhaust pipe 2. Specifically, it can be implemented using an electric butterfly valve or a pneumatic regulating valve, controlling the flow rate of moisture by changing the valve opening. The first control valve 61 adjusts the flow cross-sectional area of ​​the corresponding dehumidification branch pipe 42 by changing its opening. When the humidity inside the drying kiln 0 is high, the valve opening increases to accelerate moisture discharge; when the humidity drops to a set threshold, the valve opening decreases to reduce excessive dehumidification. Each dehumidification branch pipe 42 corresponding to each drying kiln 0 is independently equipped with a first control valve 61, allowing for differentiated adjustments based on the actual humidity conditions of different drying kilns 0.

[0032] Furthermore, the heating pipe 3 is located at the top of the drying kiln 0, and the heating pipe 3 includes a main heating pipe 31 and several heating distribution pipes 32; The main heating pipe 31 extends along the front-back direction of the plurality of drying kilns 0, and the heating distribution pipe 32 extends along the left-right direction of the drying kiln 0. Several heating distribution pipes 32 are respectively arranged on the left and right sides of the main heating pipe 31, and the main heating pipe 31 is connected to the interior of the drying kiln 0 through the heating distribution pipes 32.

[0033] The main heating pipe 31 refers to the main conveying pipe extending along the arrangement direction (front-to-back direction) of the drying kiln 0. Specifically, it can be implemented by welding metal pipes to form a continuous through structure. Its function is to evenly distribute hot air to each drying kiln 0 unit. The heating distribution pipe 32 refers to the branch conveying pipe extending along the width direction (left-to-right direction) of the drying kiln 0. Its function is to laterally distribute hot air to the two sides of the drying kiln 0 in the width direction.

[0034] The main heating pipe 31 extends along the direction of the drying kiln 0 to form a longitudinal hot air channel; the heating pipes 32 extend laterally on both sides of the main heating pipe 31, and the heating pipes 32 connect the main heating pipe 31 to the interior of the drying kiln 0, so that the drying kiln does not need to open an additional air supply port 02. The original air supply port 02 of the drying kiln can be connected to the main heating pipe 31 by flexibly using the heating pipes 32; in addition, the flexible combination structure of the heating pipes 32 being set on the left and right sides of the main heating pipe 31 can also make the heating pipe 3 avoid each other with the exhaust pipe 2 and the dehumidification pipe 4.

[0035] Specifically, hot air is sent from the main heating pipe 31 to the heating distribution pipe 32, and simultaneously input into the internal space of each drying kiln 0 by the heating distribution pipe 32. The hot air diffuses downward from the top of the drying kiln 0.

[0036] Furthermore, the heating distribution duct 32 includes a left heating distribution duct 321 and a right heating distribution duct 322; The left heating distribution duct 321 is located on the left side of the main heating duct 31, and the left heating distribution duct 321 is connected to the air supply port 02 located at the top left side. The right heating distribution duct 322 is located on the right side of the main heating duct 31, and the right heating distribution duct 322 is connected to the air supply port 02 located at the top right side. Each of the drying kilns 0 is provided with at least one left heating air distribution pipe 321 and one right heating air distribution pipe 322, and the axis of the left heating air distribution pipe 321 and the axis of the right heating air distribution pipe 322 are staggered in the front-back direction.

[0037] The left heating distribution duct 321 is a hot air delivery duct that branches off from the left side of the main heating pipe 31 and extends to the top left side of the drying kiln 0, used to evenly deliver hot air to the left side of the drying kiln. The right heating distribution duct 322 is a hot air delivery duct that branches off from the right side of the main heating pipe 31 and extends to the top right side of the drying kiln 0, used to balance the hot air supply to the right side of the drying kiln. Furthermore, the staggered arrangement of the axes of the left and right heating distribution ducts 321 and 322 in the front-to-back direction means that the left and right distribution ducts are asymmetrically arranged in the front-to-back direction to avoid back-and-forth blowing of hot air from the two sides of the drying kiln 0.

[0038] Specifically, hot air is diverted from the main heating pipe 31 to the left and right heating distribution pipes (left heating distribution pipe 321 and right heating distribution pipe 322), and then enters the kiln from the air inlets 02 on the left and right sides of the top of the drying kiln 0. Because the left and right heating distribution pipes are staggered in the front-to-back direction, the hot air entering the drying kiln 0 from the left and right sides will not directly collide, but will form staggered flow paths. For example, the hot air inlet of the left heating distribution pipe 321 is located in the front area of ​​the kiln body, while the hot air inlet of the right heating distribution pipe 322 is located in the rear area of ​​the kiln body, forming a circulating airflow covering the entire transverse cross-section within the kiln. This layout allows hot air to be replenished simultaneously from both sides, eliminating the temperature gradient caused by unilateral air supply. At the same time, the staggered airflow paths reduce local eddies, making the longitudinal and transverse distribution of hot air within the kiln more uniform.

[0039] Furthermore, it also includes a kiln heating pipe 7, which is connected to the heating pipe 3 and the roller kiln respectively.

[0040] The kiln heating pipe 7 refers to the pipe structure connecting the roller kiln and the heating pipe 3, used to transfer the high-temperature waste heat air generated by the roller kiln to the drying kiln 0. The roller kiln is a continuous high-temperature heat treatment equipment, which can be implemented using a tunnel structure. The waste gas generated during its production process carries high-temperature waste heat and is input into the drying kiln 0 through the kiln heating pipe 7 and the heating pipe 3 to achieve heat source recovery.

[0041] Specifically, one end of the heating pipe 7 inside the kiln is connected to the exhaust port of the roller kiln, and the other end forms a communication structure with the heating pipe 3. The high-temperature waste heat air generated during the operation of the roller kiln is guided to the heating pipe 3 through the heating pipe 7 inside the kiln, and mixes with the circulating air inside the drying kiln 0 to form a composite heat source. Driven by the heating circulation fan 1, the composite heat source is evenly delivered to the interiors of multiple drying kilns 0.

[0042] Furthermore, it also includes a heating air box 8, which is provided with a first air inlet 81, a second air inlet 82 and a manifold exhaust port 83; The first air inlet 81 is connected to the exhaust pipe 2, the second air inlet 82 is connected to the kiln heating pipe 7, and the exhaust port 83 is connected to the heating circulation fan 1.

[0043] The heating air box refers to an airflow confluence structure used to mix multiple hot air streams. Specifically, the first air inlet 81 is an inlet structure connected to the exhaust pipe 2, used to receive the circulating hot air discharged from the drying kiln 0; the second air inlet 82 is an inlet structure connected to the kiln's internal heating pipe 7, used to introduce high-temperature waste heat air from an external kiln (roller kiln); and the exhaust port 83 is an outlet structure connected to the heating circulating fan 1, which can be implemented using a variable-diameter conical pipe, used to centrally transport the mixed hot air to the heating circulating fan 1.

[0044] To further explain, the hot, humid air extracted from the drying kiln 0 enters the heating air box 8 through the exhaust pipe 2 from the first air inlet 81. Simultaneously, the waste heat from the roller kiln is introduced into the heating air box 8 through the kiln heating pipe 7 from the second air inlet 82. After the two airflows mix in the internal cavity of the heating air box 8, they are uniformly transported to the heating circulation fan 1 through the exhaust port 83. The heating circulation fan 1 pressurizes the mixed hot air and redistributes it to the internal system of the drying kiln 0 through the heating pipe 3, forming a closed-loop circulation. By integrating the hot air sources of the exhaust pipe 2 and the kiln heating pipe 7, centralized processing of multiple hot air streams by a single fan is achieved.

[0045] Furthermore, the heating air box 8 is located at the center of the top of multiple drying kilns 0 arranged side by side in the front-back direction, the heating air box 8 is provided with two first air inlets 81, and the number of exhaust pipes 2 is two. One of the exhaust pipes 2 is disposed at the front of the heating air box 8, and the exhaust pipe 2 is connected to a first air inlet 81; Another exhaust pipe 2 is disposed at the rear of the heating air box 8, and the exhaust pipe 2 is connected to another first air inlet 81.

[0046] By placing the heating air box 8 at the top center of the drying kiln assembly, two sets of exhaust pipes 2 extract waste gas from the front and rear areas of the drying kiln assembly, respectively. The exhaust pipe 2 at the front transports the gas discharged from the front drying kiln 0 to the second air inlet 82 on the front side of the heating air box 8, while the exhaust pipe 2 at the rear transports the gas discharged from the rear drying kiln 0 to the second air inlet 82 on the rear side of the heating air box 8. After the two airflows mix in the heating air box 8, they are redistributed to the heating system by the heating circulation fan 1. This symmetrical layout keeps the airflow extraction path in the front and rear areas balanced, avoiding the airflow imbalance caused by unilateral extraction.

[0047] Furthermore, a second control valve 62 is provided at the connection between the exhaust pipe 2 and the first air inlet 81.

[0048] The second control valve 62 is a flow regulation device installed between the exhaust pipe 2 and the first air inlet 81 of the heating air box 8. It can be implemented using a manual butterfly valve, an electric regulating valve, or a pneumatic control valve to control the gas flow rate entering the heating air box 8 from the corresponding exhaust pipe 2. By operating the second control valve 62, the gas flow rate of each exhaust pipe 2 can be adjusted individually. For example, if the flow rate of the exhaust pipe 2 at the front is too high due to its shorter path, the corresponding valve can be closed appropriately to reduce the flow rate; if the flow rate of the exhaust pipe at the rear is insufficient due to its longer path, the valve opening can be increased to balance the airflow. This branch-based regulation method can eliminate the pressure difference between different branches, ensuring that the airflow from each exhaust pipe 2 flows evenly into the heating air box 8, avoiding the impact of local airflow turbulence on the heat circulation efficiency.

[0049] The technical principles of this utility model have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this utility model without any inventive effort, and these embodiments will all fall within the scope of protection of this utility model.

Claims

1. A circulating hot air pipeline structure for multiple rapid drying kilns, wherein multiple drying kilns (0) are arranged side by side along the front-to-back direction, characterized in that: It includes a heating circulating fan (1), an exhaust pipe (2), a heating pipe (3), a dehumidifying pipe (4), and a dehumidifying fan (5), wherein the heating circulating fan (1), the exhaust pipe (2), the heating pipe (3), the dehumidifying pipe (4), and the dehumidifying fan (5) are all located outside the drying kiln (0); The exhaust pipe (2) extends along the front and rear direction of the plurality of drying kilns (0). The exhaust pipe (2) is connected to the interior of the plurality of drying kilns (0) through the exhaust port (01) of the drying kiln (0). The exhaust pipe (2) is connected to the heating pipe (3). The exhaust pipe (2) is also connected to the dehumidifying fan (5) through the dehumidifying pipe (4). The heating circulating fan (1) is connected to the heating pipe (3), which extends along the front and rear direction of the plurality of drying kilns (0). The heating pipe (3) is connected to the interior of the plurality of drying kilns (0) through the air supply port (02) of the drying kiln (0).

2. The circulating hot air pipeline structure for multiple rapid drying kilns according to claim 1, characterized in that: The dehumidification pipe (4) includes a main dehumidification pipe (41) and several branch dehumidification pipes (42). The dehumidification main pipe (41) extends along the front and rear direction of the plurality of drying kilns (0), and the dehumidification main pipe (41) and the exhaust pipe (2) are connected through the dehumidification branch pipe (42). The connection port of each of the dehumidification branch pipes (42) and the exhaust pipe (2) is close to the exhaust port (01) of each of the drying kilns (0).

3. The circulating hot air pipeline structure for multiple rapid drying kilns according to claim 2, characterized in that: A first control valve (61) is provided at the connection between the dehumidification branch pipe (42) and the exhaust pipe (2).

4. The circulating hot air pipeline structure for multiple rapid drying kilns according to claim 3, characterized in that: The heating pipe (3) is located at the top of the drying kiln (0), and the heating pipe (3) includes a main heating pipe (31) and several heating distribution pipes (32). The heating main pipe (31) extends along the front-back direction of the plurality of drying kilns (0), and the heating distribution pipe (32) extends along the left-right direction of the drying kiln (0). Several heating distribution pipes (32) are respectively located on the left and right sides of the heating main pipe (31), and the heating main pipe (31) is connected to the interior of the drying kiln (0) through the heating distribution pipes (32).

5. The circulating hot air pipeline structure for multiple rapid drying kilns according to claim 4, characterized in that: The heating distribution duct (32) includes a left heating distribution duct (321) and a right heating distribution duct (322); The left heating distribution duct (321) is located on the left side of the main heating duct (31), and the left heating distribution duct (321) is connected to the air supply port (02) located at the top left side. The right heating distribution duct (322) is located on the right side of the main heating pipe (31), and the right heating distribution duct (322) is connected to the air supply port (02) located at the top right side. Each of the drying kilns (0) has at least one left heating distribution duct (321) and one right heating distribution duct (322), with the axis of the left heating distribution duct (321) and the axis of the right heating distribution duct (322) being staggered in the front-back direction.

6. The circulating hot air pipeline structure for multiple rapid drying kilns according to claim 5, characterized in that: It also includes a kiln heating pipe (7), which is connected to the heating pipe (3) and the roller kiln respectively.

7. The circulating hot air pipeline structure for multiple rapid drying kilns according to claim 6, characterized in that: It also includes a heating air box (8), which is provided with a first air inlet (81), a second air inlet (82) and a manifold air outlet (83); The first air inlet (81) is connected to the exhaust pipe (2), the second air inlet (82) is connected to the kiln heating pipe (7), and the exhaust port (83) is connected to the heating circulation fan (1).

8. The circulating hot air pipeline structure for multiple rapid drying kilns according to claim 7, characterized in that: The heating air box (8) is located at the center of the top of a plurality of drying kilns (0) arranged side by side in the front-back direction. The heating air box (8) is provided with two first air inlets (81), and the number of exhaust pipes (2) is two. One of the exhaust pipes (2) is disposed at the front of the heating air box (8), and the exhaust pipe (2) is connected to a first air inlet (81); Another exhaust pipe (2) is disposed at the rear of the heating air box (8), and the exhaust pipe (2) is connected to another first air inlet (81).

9. The circulating hot air pipeline structure for multiple rapid drying kilns according to claim 8, characterized in that: A second control valve (62) is provided at the connection between the exhaust pipe (2) and the first air inlet (81).

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