Heat exchange device and dryer

Abstract

The embodiment of the utility model provides a heat exchange device and a dryer, and relates to the technical field of heat exchange equipment. The heat exchange device comprises a combustion bin, heat exchange pipes, a chimney, inner side plates and inner partition plates, the multiple heat exchange pipes are parallel to the combustion bin, the inner side plates are arranged in a hollow mode, the inner side plates are arranged at the two ends of the multiple heat exchange pipes, and the two ends of the multiple heat exchange pipes communicate with inner cavities of the inner side plates; a plurality of inner partition plates are arranged in the inner side plate and divide the interior of the inner side plate into a plurality of cavities, the same cavity is at least communicated with two heat exchange pipes, and the inner partition plates are used for enabling hot air to flow between the heat exchange pipes and the cavity in an S shape. The heat exchange device has the effects of increasing the heat transfer length, prolonging the heat transfer time and improving the utilization efficiency of hot air. The dryer comprises a heat exchange device, a shell, a conveying belt, an outer partition plate and a communicating fan, and the drying effect of products to be dried on the conveying belt can be improved.

Description

Technical Field

[0001] The utility model relates to the field of heat exchange equipment technology, specifically, to a heat exchange device and a dryer. Background Art

[0002] A heat exchanger is a device used to transfer heat. Existing heat exchangers typically consist of several components: a combustion chamber, heat exchange tubes, and an exhaust chamber. The combustion of fuel in the chamber heats the shell and the air inside. The hot air then flows through the heat exchange tubes to the exhaust chamber, where any remaining exhaust gases collect and are discharged. Heat exchangers are widely used in various fields, including industry, construction, transportation, and food processing.

[0003] The inventors have found through research that existing heat exchange devices generally have low heat utilization rates and low heat exchange efficiency. Utility Model Content

[0004] The purpose of the present invention is to provide a heat exchange device and a dryer, which can improve the heat utilization rate of the heat exchange device.

[0005] The embodiment of the present utility model is achieved as follows:

[0006] In a first aspect, the present invention provides a heat exchange device, comprising:

[0007] A combustion chamber, wherein the combustion chamber is in a hollow bar shape;

[0008] A heat exchange tube, wherein a plurality of heat exchange tubes are provided parallel to the combustion chamber;

[0009] An inner plate, wherein the inner plate is hollow and is provided at both ends of a plurality of heat exchange tubes, and both ends of the plurality of heat exchange tubes are connected to the inner cavity of the inner plate, and one of the inner plates is connected to the combustion chamber;

[0010] An inner baffle, wherein a plurality of inner baffles are provided inside the inner plate, the plurality of inner baffles dividing the inner plate into a plurality of chambers, wherein each chamber is connected to at least two of the heat exchange tubes, and the inner baffles are used to make the hot gas pass through multiple bends when flowing between the plurality of heat exchange tubes and the chambers;

[0011] A chimney is provided on the inner side plate and is in communication with the chamber away from one end of the combustion chamber.

[0012] By adopting the above technical solution, the interior of the inner plate is divided into multiple chambers by the inner partition, so that the hot gas has to undergo multiple bends when flowing through the heat exchange tubes and multiple chambers, thereby increasing the heat exchange path and improving the heat exchange time, making it easier to fully utilize the heat and improving the heat exchange efficiency.

[0013] In an optional embodiment, a fuel injector is further included, and a fuel inlet pipe is provided between the fuel injector and the combustion chamber.

[0014] By adopting the above technical solution, the injector intermittently sprays fuel into the combustion chamber, and can adjust the injection amount and injection interval according to usage requirements, thereby adjusting the thermal output power of the combustion chamber, thereby achieving the effect of saving energy and improving fuel utilization efficiency.

[0015] In an optional embodiment, an oil pipeline is connected to the injector.

[0016] By adopting the above technical solution, the effect of facilitating fuel supply to the injector is achieved.

[0017] In an optional embodiment, the heat exchange tubes are arranged in two rows at intervals in the vertical direction, and the two rows of heat exchange tubes are staggered.

[0018] By adopting the above technical solution, the staggered arrangement of heat exchange tubes saves space while maximizing the contact area between the heat exchange tubes and the air, thereby facilitating heating of the air around the heat exchange tubes and facilitating heat exchange.

[0019] In an optional embodiment, the inner partitions in the two inner panels are staggered.

[0020] By adopting the above technical solution, the inner partitions in the two inner plates are staggered, so that multiple heat exchange tubes are connected in sequence through the cavity, so that the hot gas generated by combustion can flow smoothly along the multiple heat exchange tubes.

[0021] In an optional embodiment, an S-shaped flow channel is formed between the plurality of heat exchange tubes and the plurality of chambers.

[0022] By adopting the above technical solution, the heat exchange path of the hot gas generated by combustion is increased and the heat exchange time is improved during the flow process, which facilitates full heat exchange utilization and improves heat exchange efficiency.

[0023] In a second aspect, the present invention provides a dryer, comprising the heat exchange device according to any one of the aforementioned embodiments, further comprising:

[0024] A shell, the shell being arranged outside the heat exchange device;

[0025] a conveyor belt, the conveyor belt being arranged in the housing and being used for conveying the product to be dried;

[0026] an outer partition, the outer partition being arranged in the housing in a direction parallel to the conveyor belt, and the outer partition being used to separate the conveyor belt from the heat exchange device;

[0027] A connecting fan is provided on the outer partition and at both ends of the outer partition, and the connecting fan connects the two sides of the outer partition.

[0028] By adopting the above technical solution, a shell is set outside the heat exchange device, and the heat exchange process is limited to the inside of the shell, which reduces the problem of heat loss to the external environment to a certain extent and further improves the heat utilization rate; and the outer partition separates the conveyor belt from the heat exchange device, thereby separating the heat generation area and the heat consumption area, effectively preventing excessive heat loss in the natural air environment and improving the heat exchange efficiency.

[0029] In an optional embodiment, an auxiliary fan is provided on the side of the outer partition facing the conveyor belt.

[0030] By adopting the above technical solution, the auxiliary fan enables hot air to circulate more effectively on the conveyor belt, thereby improving the drying effect of the dryer.

[0031] In an optional embodiment, the auxiliary fans are provided in multiple groups on a side of the outer partition facing the conveyor belt.

[0032] By adopting the above technical solution, the setting of multiple groups of auxiliary fans further improves the drying effect.

[0033] In an optional embodiment, a circulation fan is provided on a side of the outer partition facing the heat exchange device, and the air inlet and outlet directions of the circulation fan are along the transmission direction of the conveyor belt.

[0034] By adopting the above technical solution, the circulating fan can easily transport the air heated at the heat exchange device to the connecting fan, thereby circulating the hot air at the heat exchange device to the conveyor belt, thereby improving the drying effect.

[0035] The beneficial effects of the embodiments of the present utility model include:

[0036] The inner plate is divided into multiple chambers, and multiple heat exchange tubes are connected between the two inner plates, so as to realize S-shaped flow of hot air between the multiple heat exchange tubes, increase the heat transfer length, extend the heat transfer time, improve the utilization efficiency of the hot air, and thus improve the heat exchange efficiency of the heat exchange device. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0038] Figure 1 A schematic structural diagram of a heat exchange device provided in some optional embodiments of the present invention;

[0039] Figure 2 Schematic diagram of the internal structure of the inner plate of the heat exchange device provided in some optional embodiments of the present utility model;

[0040] Figure 3 A schematic diagram of the position of an inner baffle in a heat exchange device provided in some optional embodiments of the present utility model;

[0041] Figure 4 Schematic diagram of the dryer structure provided for some optional embodiments of the present utility model.

[0042] Icons: 100-heat exchange device; 110-combustion chamber; 120-heat exchange tube; 130-chimney; 140-inner plate; 141-chamber; 150-inner partition; 160-injector; 161-fuel inlet pipe; 162-oil pipeline;

[0043] 200-dryer; 210-housing; 220-conveyor belt; 230-external partition; 240-continuous fan; 250-auxiliary fan; 260-circulating fan; DETAILED DESCRIPTION

[0044] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0045] 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 rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0046] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0047] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is typically placed when in use. These terms are intended solely to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0048] Furthermore, terms such as "horizontal" and "vertical" do not necessarily mean that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0049] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0050] The heat exchange device increases its own temperature by burning the internal fuel. Currently, the heat exchange device is generally composed of a combustion chamber, a heat exchange tube, and an exhaust chamber. The combustion of the fuel in the combustion chamber heats the internal air, and the hot air flows toward the exhaust chamber through the heat exchange tube, and exchanges heat with the external environment through the heat exchange tube to achieve the purpose of heat exchange.

[0051] The heat exchange tube is the area with the highest heat exchange efficiency in the heat exchange device. However, the heat exchange tubes of existing heat exchange devices are generally short. At the same time, the hot gas only passes through the heat exchange tube once for heat exchange, resulting in a large amount of heat not being fully utilized and wasted, and the overall heat exchange efficiency is low.

[0052] In view of the above situation, the present application provides a heat exchange device and a dryer for improving the heat exchange efficiency of the heat exchange device. Figure 1-Figure 4 , the basic structure, working principle and technical effects achieved of the heat exchange device and dryer provided in this application are introduced in detail.

[0053] Please refer to Figure 1 and Figure 2This embodiment provides a heat exchange device 100, which includes a combustion chamber 110, heat exchange tubes 120, and a chimney 130. The combustion chamber 110 provides a space for fuel combustion. The heat exchange tubes 120 are metal tubes with good thermal conductivity. Multiple heat exchange tubes 120 are arranged in a direction parallel to the length of the combustion chamber 110, and the multiple heat exchange tubes 120 are arranged at intervals. Furthermore, the heat exchange device 100 also includes an inner plate 140 and an inner partition 150. The inner plate 140 is a rectangular plate body and is hollow. Two inner plates 140 are arranged opposite each other, and the two inner plates 140 are respectively located at the two ends of the multiple heat exchange tubes 120. The two ends of the multiple heat exchange tubes 120 respectively pass through the two inner plates 140 and communicate with the internal cavity of the inner plates 140. Multiple inner baffles 150 are disposed within the inner plate 140. These inner baffles 150 divide the inner cavity of the inner plate 140 into multiple chambers 141. Each chamber 141 is connected to at least two heat exchange tubes 120. The provision of the inner baffles 150 allows the hot gas to flow in an S-shaped pattern between the multiple heat exchange tubes 120 and the multiple chambers 141, thereby increasing the heat exchange time between the hot gas and the external environment, improving the utilization efficiency of the hot gas, and thus improving the heat exchange efficiency. The chimney 130 is connected to the inner plate 140 and is connected to the chamber 141 at the end of the inner plate 140 away from the combustion chamber 110. That is, the chimney 130 is connected to the last chamber 141 located in the flue gas flow, so that the hot gas is discharged through the chimney 130 after sufficient heat exchange.

[0054] For further information, please refer to Figure 2 and Figure 3 In this embodiment, 14 heat exchange tubes 120 are provided, and the heat exchange tubes 120 are arranged in two rows staggered up and down. The inner partition 150 is arranged in an inclined state in the inner plate 140. The chamber 141 separated by the inner partition 150 is connected to four heat exchange tubes 120, and the inner partitions 150 in the two inner plates 140 are staggered, thereby forming an S-shaped flow channel between the multiple heat exchange tubes 120 and the multiple chambers 141, thereby achieving the effect of hot gas flowing along the S shape in the multiple heat exchange tubes 120. In other optional embodiments, according to design requirements, the heat exchange tubes 120 can be set to other numbers, as long as at least two heat exchange tubes 120 are connected in the same chamber 141 separated by the inner partition 150, and the two or more heat exchange tubes 120 connected in the same chamber 141 of the single-side inner plate 140 are located in two different chambers 141 in the other-side inner plate 140. In this way, an S-shaped flow channel can be formed between the multiple heat exchange tubes 120 and the multiple chambers 141, thereby realizing the flow of heat flow in the multiple heat exchange tubes 120 and the multiple chambers 141.

[0055] By dividing the inner plate 140 into multiple chambers 141 and connecting multiple heat exchange tubes 120 between the two inner plates 140, S-shaped flow of hot air between the multiple heat exchange tubes 120 is achieved, which increases the heat transfer length, prolongs the heat transfer time, improves the utilization efficiency of the hot air, and thus improves the heat exchange efficiency of the heat exchange device.

[0056] Please refer to Figure 1 and Figure 2 To facilitate adjustment of the thermal output of the combustion chamber 110 according to actual usage requirements, the heat exchange device 100 further includes a fuel injector 160, mounted at one end of the combustion chamber 110. A fuel inlet pipe 161 connects the fuel injector 160 and the combustion chamber 110. To facilitate the supply of fuel to the fuel injector 160, a fuel delivery pipe 162 is connected to the fuel injector 160 for delivering fuel to the fuel injector 160. The fuel injector 160 intermittently injects fuel into the combustion chamber 110 through the fuel inlet pipe 161. The fuel injection amount and injection interval can be adjusted according to usage requirements, thereby adjusting the thermal output of the combustion chamber 110.

[0057] The working principle of a heat exchange device 100 provided in this embodiment is: multiple heat exchange tubes 120 are connected through an inner plate 140, and the inner plate 140 is divided into multiple chambers through an inner partition 150, so that the multiple heat exchange tubes 120 are connected in an S shape, and then the hot gas flows in the multiple heat exchange tubes 120 in an S shape, which increases the heat transfer length, prolongs the heat transfer time, fully utilizes the heat generated by combustion, reduces the preheating lost from the chimney 130, and improves the heat utilization efficiency.

[0058] In some other optional embodiments, a drying machine 200 is also provided. Figure 3 The dryer 200 includes the aforementioned heat exchange device 100, as well as a housing 210, a conveyor belt 220, an outer partition 230, and a connecting fan 240. The housing 210 is mounted outside the heat exchange device 100, and the conveyor belt 220 is installed within the housing 210. Inlets and outlets for the conveyor belt 220 are provided at both ends of the housing 210. The conveyor belt 220 is used to transport products to be dried into the dryer 200 for drying and to remove the dried products from the dryer 200. The heat exchange device 100 performs heat exchange and drying on the products transported on the conveyor belt 220 within the housing 210. The heat exchange process is confined to the interior of the housing 210, which to a certain extent reduces the problem of heat loss to the external environment and further improves heat utilization.

[0059] For further information, please refer to Figure 4The outer partition 230 is arranged inside the shell 210. The plane where the outer partition 230 is located is parallel to the plane where the conveyor belt 220 is located. The outer partition 230 separates the conveyor belt 220 from the heat exchange device 100, and further separates the heat generation area from the heat consumption area, effectively preventing excessive heat loss in the natural air environment and improving the heat exchange efficiency. In order to improve the drying efficiency of the dryer 200, a group of circulating fans 260 are provided on the outer partition 230 and at both ends of the outer partition 230. The circulating fans 260 connect the two sides of the partition, that is, connect the space where the heat exchange device 100 is located with the space where the conveyor belt 220 is located. By controlling one group of circulating fans 260 to inhale air and another group of circulating fans 260 to blow, the internal circulation of hot air in the shell is realized. On the one hand, the products to be dried on the conveyor belt 220 are fully dried. On the other hand, the heat is fully utilized to prevent excessive heat loss to the external environment, thereby improving the heat exchange efficiency.

[0060] For further information, please refer to Figure 4 To further enhance the drying effect, multiple sets of auxiliary fans 250 are installed on the side of the outer partition 230 facing the conveyor belt 220. The auxiliary fans 250 enable hot air to circulate more effectively on the conveyor belt 220, thereby further enhancing the drying efficiency of the products on the conveyor belt 220. Furthermore, to enhance the heat circulation effect within the housing, a circulating fan 260 is installed on the side of the outer partition 230 facing the heat exchange device 100. The air inlet and outlet directions of the circulating fan 260 are aligned with the transmission direction of the conveyor belt 220. The circulating fan 260 facilitates the delivery of heated air from the heat exchange device 100 to the connecting fan 240, thereby facilitating the circulation of hot air from the heat exchange device 100 to the conveyor belt 220, thereby enhancing the drying effect.

[0061] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A heat exchange device, characterized in that: include: A combustion chamber, wherein the combustion chamber is in a hollow bar shape; A heat exchange tube, wherein a plurality of heat exchange tubes are provided parallel to the combustion chamber; An inner plate, wherein the inner plate is hollow and is provided at both ends of a plurality of heat exchange tubes, and both ends of the plurality of heat exchange tubes are connected to the inner cavity of the inner plate, and one of the inner plates is connected to the combustion chamber; An inner baffle, wherein a plurality of inner baffles are provided inside the inner plate, the plurality of inner baffles dividing the inner plate into a plurality of chambers, wherein each chamber is connected to at least two of the heat exchange tubes, and the inner baffles are used to make the hot gas pass through multiple bends when flowing between the plurality of heat exchange tubes and the chambers; A chimney is provided on the inner side plate and is in communication with the chamber away from one end of the combustion chamber.

2. The heat exchange device according to claim 1, characterized in that It also includes a fuel injector, and a fuel inlet pipe is provided between the fuel injector and the combustion chamber.

3. The heat exchange device according to claim 2, characterized in that The fuel injector is connected with an oil delivery pipe.

4. The heat exchange device according to claim 1, characterized in that The heat exchange tubes are arranged in two rows at intervals in the vertical direction, and the two rows of heat exchange tubes are staggered.

5. The heat exchange device according to claim 4, characterized in that The inner partitions in the two inner side plates are arranged in a staggered manner.

6. The heat exchange device according to claim 5, characterized in that An S-shaped flow channel is formed between the plurality of heat exchange tubes and the plurality of chambers.

7. A drying machine, characterized in that: The heat exchange device according to any one of claims 1 to 6 further comprises: A shell, the shell being arranged outside the heat exchange device; a conveyor belt, the conveyor belt being arranged in the housing and being used for conveying the product to be dried; an outer partition, the outer partition being arranged in the housing in a direction parallel to the conveyor belt, and the outer partition being used to separate the conveyor belt from the heat exchange device; A connecting fan is provided on the outer partition and at both ends of the outer partition, and the connecting fan connects the two sides of the outer partition.

8. A drying machine according to claim 7, characterized in that: An auxiliary fan is provided on the side of the outer partition facing the conveyor belt.

9. A drying machine according to claim 8, characterized in that: The auxiliary fans are arranged in multiple groups on a side of the outer partition facing the conveyor belt.

10. The drying machine according to claim 7, characterized in that: A circulation fan is provided on a side of the outer partition facing the heat exchange device, and the air inlet and outlet directions of the circulation fan are along the transmission direction of the conveyor belt.

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