Hot air circulating system and furnace body equipment thereof

Abstract

The utility model belongs to the technical field of drying equipment, and particularly relates to a hot air circulating system and furnace body equipment thereof. The hot air circulating system comprises a plurality of condensers communicated with an inner cavity of a furnace body through a first pipeline; the two filtering modules are arranged at the two ends of the protection cover respectively; the cavity structure is located below the condenser; the sealing plate is located in the cavity structure and divides the cavity structure into a first cavity and a second cavity, the first cavity communicates with the condenser air outlet and the filtering module, and the second cavity communicates with the first cavity through an air blower; when the air blower works, hot air in the furnace body is sucked into the condenser in a negative pressure mode, and condensed hot air flows to the filtering module through the first cavity. The air blower conveys filtered hot air to the second cavity, and the second cavity conveys the hot air back to the furnace body through a second pipeline.

Description

Technical Field

[0001] This utility model belongs to the technical field of drying equipment, and particularly relates to hot air circulation systems and their furnace equipment. Background Technology

[0002] In related technologies, traditional nitrogen drying equipment typically filters and recycles high-temperature waste gas. However, traditional hot air circulation devices suffer from technical defects such as uneven airflow distribution and easy deformation of the cavity structure, making it difficult to achieve stable internal hot air circulation. Therefore, how to solve these defects is a technical problem that urgently needs to be addressed in this field.

[0003] It should be noted that the information disclosed in this background section is only for understanding the background technology of this application concept, and therefore, the above description is not considered to constitute information related to the technology. Utility Model Content

[0004] This disclosure provides at least one hot air circulation system and its furnace body equipment.

[0005] In a first aspect, embodiments of this disclosure provide a hot air circulation system, including:

[0006] Several condensers are connected to the furnace cavity via a first pipe;

[0007] The filter modules are located at both ends of the protective cover.

[0008] A cavity structure located below the condenser;

[0009] The sealing plate is located inside the cavity structure and divides the cavity structure into a first chamber and a second chamber. The first chamber is connected to the condenser air outlet and the filter module, and the second chamber is connected to the first chamber through a blower.

[0010] When the blower is working, it draws the hot air inside the furnace into the condenser under negative pressure. The condensed hot air then flows through the first chamber to the filter module.

[0011] The blower delivers the filtered hot air to the second chamber, and the second chamber then returns the air to the furnace body through the second pipeline.

[0012] In one alternative embodiment, one end of the first pipe is inserted into the furnace body, and a plurality of exhaust holes are evenly distributed around the outer wall of the first pipe.

[0013] In one optional embodiment, there are two blowers, and the two blowers are located at opposite ends of the protective cover.

[0014] The input end of the blower is connected to the outlet of the filter module, and its output end is connected to the inlet of the second chamber.

[0015] In one alternative embodiment, the sealing plate is inclined and the angle between it and the horizontal plane is 50-55°.

[0016] In one optional embodiment, a plurality of guide holes are evenly distributed on the top wall of the first chamber, and the spacing between adjacent guide holes is 1.5-2 times the hole diameter.

[0017] In one optional embodiment, the filtration module is an activated carbon module, which employs a multi-stage filtration layer, with each layer filled with coconut shell activated carbon particles with a mesh size of 20-40 mesh.

[0018] In one optional embodiment, the second chamber sidewall is evenly distributed with a plurality of exhaust ports along its length, with one second pipe corresponding to one exhaust port, so that the filtered hot air is evenly delivered into the furnace body.

[0019] In one optional embodiment, the inner wall of the cavity structure and the outer wall of the sealing plate are both coated with a nano-ceramic heat insulation coating with a thickness of 0.2-0.5 mm.

[0020] In one alternative embodiment, a protective cover is located above the furnace body and is hollow inside;

[0021] Several condensers are evenly distributed inside the protective cover.

[0022] Secondly, this disclosure also provides a furnace body device, wherein a hot air circulation system is provided on the furnace body device.

[0023] The beneficial effects of this utility model are as follows: It provides a hot air circulation system and its furnace body. Through the evenly distributed exhaust holes on the outer wall of the first pipeline, the extraction volume of waste gas is increased while maintaining pressure balance within the furnace body. The evenly distributed secondary pipelines ensure that the condensed and filtered hot air flows evenly into the furnace body, reducing fluctuations in the extracted waste gas and filtered / recovered hot air, resulting in a more uniform hot airflow within the furnace body. Furthermore, the combination of the cavity structure and the sealing plate achieves dual-chamber flow diversion, allowing the high-temperature waste gas to re-enter the heat circulation after condensation. This structure enhances the structural strength of the equipment, making the cavity less prone to deformation.

[0024] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention are realized and obtained through the structures particularly pointed out in the description and the accompanying drawings.

[0025] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the specific embodiments or related technologies of this utility model, the drawings used in the description of the specific embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0027] Figure 1 A perspective view of a hot air circulation system provided in an embodiment of this disclosure;

[0028] Figure 2 An internal perspective view of the protective cover provided in an embodiment of this disclosure;

[0029] Figure 3 A longitudinal sectional view of the condenser and cavity structure provided in an embodiment of this disclosure.

[0030] In the picture:

[0031] 1. Furnace body;

[0032] 2. Protective cover; 20. First pipeline; 201. Air extraction port; 21. Second pipeline;

[0033] 3. Condenser; 4. Filter module;

[0034] 5. Cavity structure; 51. First chamber; 510. Flow guide hole; 52. Second chamber; 520. Exhaust port;

[0035] 6. Sealing plate; 7. Blower. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0037] In this document, when it is mentioned that a first component is located on a second component, this can mean that the first component can be directly formed on the second component, or that a third component can be inserted between the first and second components. Furthermore, in the accompanying drawings, the thickness of the components may be exaggerated or reduced for the purpose of effectively describing the technical content.

[0038] In this document, exemplary embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. As used herein, expressions such as “at least one of…” modify the entire list of elements when following a list of elements, rather than individual elements in the list. For example, the expression “at least one of a, b, and c” should be understood to include only a, only b, only c, both a and b, both a and c, both b and c, or all of a, b, and c.

[0039] The terminology used herein is for the purpose of describing specific exemplary configurations only and is not intended to be limiting. As used herein, the singular articles “a,” “an,” and “the” may also be intended to include plural forms unless otherwise clearly stated herein. The terms “comprising,” “including,” and “having” are inclusive and thus specify the presence of features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein should not be construed as requiring them to be performed in the specific order discussed or shown, unless specifically identified as such. Additional or alternative steps may be employed.

[0040] As used herein, the phrases “in one embodiment,” “according to one embodiment,” “in some embodiments,” etc., generally refer to the fact that a particular feature, structure, or characteristic following the phrase can be included in at least one embodiment of this disclosure. Therefore, a particular feature, structure, or characteristic can be included in more than one embodiment of this disclosure, such that these phrases do not necessarily refer to the same embodiment. As used herein, the terms “example,” “exemplary,” etc., are used to “serve as an example, instance, or illustration.” Any implementation, aspect, or design described herein as “example” or “exemplary” is not necessarily to be construed as preferred or superior to other implementations, aspects, or designs. Rather, the use of the terms “example,” “exemplary,” etc., is intended to present concepts in a specific manner.

[0041] Research has revealed that traditional nitrogen drying equipment typically filters and recycles high-temperature waste gas. However, traditional hot air circulation devices suffer from technical defects such as uneven airflow distribution and easily deformable cavity structures, making it difficult to achieve stable internal hot air circulation. During long-term operation, the lack of an effective heat recovery structure and multi-stage filtration mechanism often leads to increased energy costs and poses a risk of secondary pollution from the waste gas.

[0042] Therefore, how to solve the above-mentioned defects is a technical problem that urgently needs to be solved in this field.

[0043] The defects in the above solutions and the reasons for their occurrence are the results of the inventors' practice and careful research. Therefore, the discovery process of the above problems and the solutions proposed in this disclosure should be considered as the inventors' contributions to this disclosure.

[0044] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0045] The following detailed description, with reference to the accompanying drawings, describes some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0046] like Figures 1 to 3 As shown, at least one embodiment provides a hot air circulation system, including: a protective cover 2, located above the furnace body 1 and hollow inside; the protective cover 2 is rectangular and made of 304 stainless steel. A plurality of condensers 3 are evenly distributed within the protective cover 2 and connected to the inner cavity of the furnace body 1 via a first pipe 20; the first pipe 20 is multiple, and each first pipe 20 has its two ends connected to the air inlets of the furnace body 1 and the condenser 3, respectively. Two filter modules 4 are respectively disposed at both ends of the protective cover 2; a cavity structure 5 is located inside the protective cover 2 and below the condenser 3; a sealing plate 6 is located inside the cavity structure 5 and divides the cavity structure 5 into a first chamber 51 and a second chamber 52, the first chamber 51 guiding the condensed hot airflow, and the second chamber 52 being evenly transported to the furnace body 1 via a second pipe 21. The first chamber 51 connects the air outlet of the condenser 3 to the filter module 4, and the second chamber 52 connects to the first chamber 51 via a blower 7. When the blower 7 operates, it draws hot air from the furnace body 1 into the condenser 3 under negative pressure. The condensed hot air then flows through the first chamber 51 to the filter module 4. The blower 7 then delivers the filtered hot air to the second chamber 52, which in turn returns it to the furnace body 1 via a second pipe 21. The evenly distributed exhaust holes 201 on the outer wall of the first pipe 20 increase the amount of exhaust gas extracted while maintaining pressure balance within the furnace body 1. The evenly distributed second pipes 21 ensure that the condensed and filtered hot air flows evenly into the furnace body 1, reducing fluctuations in the extracted and filtered hot air, resulting in a more uniform airflow within the furnace body 1. The combination of the cavity structure 5 and the sealing plate 6 achieves dual-chamber flow separation, allowing the high-temperature exhaust gas to re-enter the heat cycle after condensation. This structure enhances the structural strength of the equipment, making the chamber less prone to deformation.

[0047] Reference Appendix Figure 1One end of the first pipe 20 is inserted into the furnace body 1, and several exhaust holes 201 are evenly distributed around the outer wall of the first pipe 20 to reduce the fluctuation of the gas field inside the furnace body 1 during negative pressure suction. The opening of several exhaust holes 201 on the side wall of the first pipe 20 can not only increase the suction volume, but also reduce the impact of suction on the gas field inside the furnace when the exhaust fan is working.

[0048] Continue to refer to the appendix Figure 1 Since the furnace body 1 is typically 3-8 meters long, two blowers 7 are installed, with each blower 7 located at one end of the protective cover 2. The blowers 7 operate simultaneously at both ends of the furnace body 1 to avoid insufficient suction and poor airflow caused by a single blower 7 on one side due to the furnace body 1's length. An inlet pipe and an outlet pipe are respectively installed at both ends of the protective cover 2. The outlet pipe connects to the outlet of the filter module 4 and to the input end of the blower 7. The inlet pipe connects the second chamber 52 to the output end of the blower. The blower 7 includes an input end and an output end; the input end connects to the outlet of the filter module 4, and the output end connects to the inlet of the second chamber 52.

[0049] Reference Appendix Figure 3 The sealing plate 6 is inclined, with an angle of 50-55° to the horizontal plane. The sealing plate 6 and the cavity structure 5 form an axisymmetric trapezoid. Furthermore, the sealing plate 6 is designed with a 53° inclination and a thickness of 4mm to divide the airflow within the cavity structure 5 into two paths. Both ends of the sealing plate 6 are welded to the inner wall of the cavity structure 5. Wind tunnel testing verified that when the inclination angle of the sealing plate 6 is 53°, the uniformity of the hot air velocity in the first chamber 51 is improved compared to when the inclination angle of the sealing plate 6 is 45°, while the deformation of the cavity structure 5 decreases.

[0050] Figure 3 In the diagram, F1 indicates the direction of hot air flow, that is, hot air flows into the condenser 3 through the first pipe 20; F2 indicates the direction of hot air flow after condensation by the condenser 3, that is, hot air flows into the first chamber 51 after passing through the guide hole 510; F3 indicates the direction of hot air flow after filtration, that is, hot air flows into the second chamber 52 after being filtered by the filter module 4, and flows back into the furnace body 1 through the second pipe 21.

[0051] Reference Appendix Figure 2 The top wall of the first chamber 51 is evenly distributed with a plurality of guide holes 510, and the spacing between adjacent guide holes 510 is 1.5-2 times the hole diameter. Figure 2 F3 in the text indicates that the hot air flows to the blower 7 after being condensed and filtered.

[0052] Reference Appendix Figure 2The filter module 4 is an activated carbon module, which employs a multi-stage filtration layer, with each layer filled with coconut shell activated carbon particles of 20-40 mesh. The multi-stage filtration layer includes three stages: the first stage is a 20-mesh coconut shell activated carbon layer with a thickness of 100 mm; the second stage is a 30-mesh coconut shell activated carbon layer with a thickness of 150 mm; and the third stage is a 40-mesh coconut shell activated carbon layer with a thickness of 200 mm. After filtration, the concentration of volatile organic compounds in the gas is significantly reduced.

[0053] The second chamber 52 has several exhaust ports 520 evenly distributed along its length on its sidewalls, with one exhaust port 520 corresponding to one second pipe 21, so that the filtered hot air is evenly delivered into the furnace body 1. The inner wall of the cavity structure 5 and the outer wall of the sealing plate 6 are both coated with a nano-ceramic heat insulation coating with a thickness of 0.2-0.5 mm. The 0.3 mm nano-ceramic heat insulation coating sprayed on the surface of the sealing plate 6 and the inner wall of the cavity structure 5 can effectively reduce heat loss.

[0054] The working principle is as follows:

[0055] When the blower 7 is working, it draws the hot air in the furnace body 1 into the condenser 3 through the first pipeline 20. After passing through the condenser 3, the temperature of the hot air will drop by about 100°.

[0056] Hot air passing through condenser 3 flows into first chamber 51 through guide hole 510. The air in first chamber 51 flows to filter module 4, and filter module 4 filters and intercepts volatile organic compounds in hot air.

[0057] After being filtered, the hot air flows into the second chamber 52 after passing through the blower 7. The second chamber 52 then sends the hot air back into the furnace body 1 through the second pipe 21.

[0058] At least one embodiment provides a furnace body device, wherein the furnace body device is provided with the above-mentioned hot air circulation system for filtering and recycling the thermal energy of the exhaust gas inside the furnace body 1.

[0059] In the description of the embodiments of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0060] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and 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, and therefore should not be construed as a limitation of this utility model. Furthermore, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence unless expressly indicated herein. Therefore, without departing from the teachings of the exemplary embodiments, the first element, component, region, layer, or segment discussed above may be referred to as the second element, component, region, layer, or segment.

[0061] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A hot air circulation system, characterized in that, include: Several condensers (3) are connected to the inner cavity of the furnace body (1) through the first pipe (20); Filter modules (4), two filter modules (4) are respectively set at both ends of the protective cover (2); A cavity structure (5) is located below the condenser (3); The sealing plate (6) is located inside the cavity structure (5) and divides the cavity structure (5) into a first chamber (51) and a second chamber (52). The first chamber (51) is connected to the air outlet of the condenser (3) and the filter module (4). The second chamber (52) is connected to the first chamber (51) through the blower (7). When the blower (7) is working, it draws the hot air in the furnace body (1) into the condenser (3) under negative pressure. The condensed hot air flows through the first chamber (51) to the filter module (4). The blower (7) delivers the filtered hot air to the second chamber (52), and the second chamber (52) delivers the air back to the furnace body (1) through the second pipeline (21).

2. The hot air circulation system as described in claim 1, characterized in that, One end of the first pipe (20) is inserted into the furnace body (1), and several exhaust holes (201) are evenly distributed around the outer wall of the first pipe (20).

3. The hot air circulation system as described in claim 1, characterized in that, There are two blowers (7), and the two blowers (7) are located at the two ends of the protective cover (2); The input end of the blower (7) is connected to the outlet of the filter module (4), and its output end is connected to the inlet of the second chamber (52).

4. The hot air circulation system as described in claim 1, characterized in that, The sealing plate (6) is inclined and the angle between it and the horizontal plane is 50-55°.

5. The hot air circulation system as described in claim 1, characterized in that, The top wall of the first chamber (51) is evenly distributed with several guide holes (510), and the spacing between adjacent guide holes (510) is 1.5-2 times the hole diameter.

6. The hot air circulation system as described in claim 1, characterized in that, The filter module (4) is an activated carbon module, which adopts a multi-stage filter layer, with each layer filled with coconut shell activated carbon particles with a mesh size of 20-40.

7. The hot air circulation system as described in claim 1, characterized in that, The second chamber (52) has several exhaust ports (520) evenly distributed along its length on the side wall. One second pipe (21) corresponds to one exhaust port (520) so that the filtered hot air is evenly delivered into the furnace body (1).

8. The hot air circulation system as described in claim 1, characterized in that, The inner wall of the cavity structure (5) and the outer wall of the sealing plate (6) are both coated with a nano-ceramic heat insulation coating with a thickness of 0.2mm-0.5mm.

9. The hot air circulation system as described in claim 1, characterized in that, The hot air circulation system also includes a protective cover (2), which is located above the furnace body (1) and is hollow inside; Several condensers (3) are evenly distributed inside the protective cover (2).

10. A furnace body device, characterized in that, The furnace body equipment is provided with a hot air circulation system as described in any one of claims 1-9.

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