Reciprocating spiral type efficient heat exchange structure

Abstract

The utility model provides a reciprocating spiral type efficient heat exchange structure which comprises a heat exchange plate, the heat exchange plate is of a spiral structure, and a spiral fresh air flow channel is arranged in the heat exchange plate. A spiral hot air gap is formed between the adjacent outer walls of the heat exchange plates, and the fresh air flow channel and the hot air gap jointly form a double-spiral structure arranged in a stacked and wound mode. The hot air gaps are separated to form a plurality of hot air cavities; the adjacent hot air cavities are communicated end to end to form a continuous S-shaped hot air flow channel; a plurality of ash collecting bins used for being communicated with the outside are arranged at the bottom end of the heat exchange plate and located at the lower ends of the hot air cavities, and the adjacent hot air cavities share one ash collecting bin. According to the utility model, the problems that the more layers of combustion tail gas are, the more ash collecting chambers and ash cleaning port channels are, and the complexity of the structure and the complexity of ash cleaning operation are increased in the prior art can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchange devices, in particular to a reciprocating spiral high-efficiency heat exchange structure. Background Art

[0002] Hot air stoves are widely used in people's production and life. Their working method is to use the heat released by fuel combustion to heat the air through high-temperature flue gas, so that the air temperature reaches the use standard. They are used in domestic heating, industrial production, thermal curing, grain drying and other fields. The overall structure of the hot air stove can be divided into two parts. One part is the combustion chamber, which is the heat generating part of fuel combustion, and the other part is the heat exchanger, which is a structural device that exchanges the heat carried by the high-temperature gas generated in the combustion chamber with the fresh air from the outside. The fresh air with a lower temperature from the outside exchanges heat with the high-temperature flue gas generated in the combustion chamber in the heat exchanger, and is heated to form hot air.

[0003] The high-temperature gas generated in the combustion chamber of the existing hot blast stove flows in the form of an air flow beam in the smoke pipe and dissipates heat through the outer surface of the smoke pipe; while the fresh air flows through the smoke pipe surface to absorb heat, and its heat dissipation area is small. The heat exchange smoke pipe of the heat exchange structure is perpendicular to the wind direction of the fresh air, and turbulence is easily generated on the leeward side of the smoke pipe and the part that obstructs the airflow, resulting in a large wind resistance of the fresh air, resulting in low efficiency of heat exchange and thermal energy utilization. In order to solve the problems existing in the prior art, the utility model with publication number CN112050468A discloses a spiral plate type internal combustion high-efficiency hot blast stove (hereinafter referred to as prior art 1), which includes The hot blast furnace includes a furnace body, in which a combustion chamber and a spiral plate heat exchanger are arranged. The combustion chamber is arranged in the middle of the lower part of the furnace body, and the spiral plate heat exchanger is arranged on the upper periphery of the combustion chamber. The spiral plate heat exchanger is a plate structure with a spiral layer distribution around the central axis of the furnace body. The heat exchanger is provided with a fresh cold air inlet and a combustion exhaust gas outlet. The plate structure includes a hot air gap and a fresh air cavity. The fresh air cavity and the fresh air cavity are connected with the fresh hot air outlet. The fresh hot air outlet is arranged on the side wall of the furnace body, and an ash collecting bin is provided at the bottom of the hot air gap.

[0004] Although the prior art 1 is able to exchange heat with the combustion exhaust gas by setting up a plate structure with a spiral layered distribution; however, the number of ash collecting bins in the prior art 1 corresponds to the number of layers rotated by the combustion exhaust gas, so the more spiral layers of the combustion exhaust gas, the more ash collecting bins and ash cleaning channels there are, which increases the complexity of the structure and the complexity of the cleaning operation. Utility Model Content

[0005] The purpose of the present utility model is to provide a reciprocating spiral high-efficiency heat exchange structure, which, in actual use, can solve the problem in the prior art that the more spiral layers of combustion exhaust gas there are, the more ash collecting chambers and ash cleaning port channels there are, which increases the complexity of the structure and the complication of the cleaning operation.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0007] A reciprocating spiral high-efficiency heat exchange structure, comprising a heat exchange plate, wherein the heat exchange plate is a spiral structure and a spiral fresh air flow channel is provided in the heat exchange plate;

[0008] A spiral hot air gap is formed between adjacent outer walls of the heat exchange plates, and the fresh air flow channel and the hot air gap together form a double helix structure arranged in a stacked and intertwined manner; the hot air gap is divided into a plurality of hot air cavities; and adjacent hot air cavities are interconnected end to end to form a continuous S-shaped hot air flow channel;

[0009] The bottom end of the heat exchange plate is provided with an ash collecting bin for communicating with the outside world. The ash collecting bin is located at the lower end of the hot air cavity, and adjacent hot air cavities share one ash collecting bin.

[0010] Preferably, a plurality of partition plates are connected to the heat exchange plate, and the plurality of partition plates are used to divide the hot air gap to form the hot air cavity.

[0011] Preferably, the heat exchange plate is provided with a bending portion, and adjacent bending portions are in close contact or connected to separate the hot air gap to form the hot air cavity.

[0012] Preferably, the ash collecting bins are arranged in layers from top to bottom.

[0013] Preferably, the ash collecting bin is provided with a plurality of ash cleaning ports for communicating with the interior of the ash collecting bin, and a sealing cover plate is installed on the ash cleaning ports.

[0014] Preferably, the ash cleaning ports are arranged at equal intervals along the circumference of the ash collecting bin.

[0015] Preferably, an emergency heat exhaust port is provided on the heat exchange plate.

[0016] Preferably, heat dissipation fins are connected to the inner wall of the fresh air flow channel.

[0017] Preferably, a cleaning port cover for closing the top opening of the hot air flow channel is installed on the heat exchange plate.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] In the present invention, by providing the fresh air flow channel in a spiral shape, the path for the fresh air to move in the heat exchanger can be increased, thereby further increasing the heat exchange time and heat exchange area between the fresh air moving in a spiral from the outside to the inside and the combustion exhaust gas moving from the inside to the outside, thereby achieving a better heat exchange effect and further improving the thermal energy utilization efficiency;

[0020] By changing the flow direction of the exhaust gas generated by the combustion, the number of the ash collecting bins is reduced, the volume of the ash collecting bins is increased, and the path of the ash cleaning port is widened, thereby achieving the purpose of faster and simpler ash cleaning and reducing the frequency of ash cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] 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 show 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 creative work.

[0022] Figure 1 This is a schematic diagram of the use state of the utility model.

[0023] Figure 2 This is a schematic diagram of the connection between the hot air cavity and the cleaning port cover in the present invention.

[0024] Figure 3 For this utility model Figure 1 Middle AA section view.

[0025] Figure 4 In this utility model Figure 1 Middle BB cross-section.

[0026] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0027] 101-furnace body, 102-combustion chamber, 103-heat exchange plate, 104-fresh air flow channel, 105-hot air flow channel, 106-exhaust gas outlet, 107-fresh air inlet, 108-flow direction of combustion exhaust gas, 109-fresh air flow direction, 110-ash cleaning port, 111-ash collection bin, 112-cleaning port cover, 113-sealing cover, 114-emergency heat exhaust port, 115-fresh air outlet, 116-heat dissipation fins, 117-combustion exhaust gas flow path, 118-fresh air flow path, 119-hot air cavity, 120-bending part. DETAILED DESCRIPTION

[0028] Hereinafter, only certain exemplary embodiments are briefly described. As will be appreciated by those skilled in the art, the described embodiments may be modified in various ways without departing from the spirit or scope of the embodiments of the present invention. Therefore, the drawings and description are to be regarded as illustrative in nature and not restrictive.

[0029] In the description of the embodiments of the present invention, it should be understood that the terms "length", "vertical", "horizontal", "top", "bottom", etc. indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present invention.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0031] In the embodiments of the present invention, unless otherwise expressly specified or limited, the terms "installed," "connected," "connected," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of the present invention based on specific circumstances.

[0032] In the embodiments of the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0033] The disclosure below provides many different embodiments or examples for implementing different structures of the embodiments of the present invention. In order to simplify the disclosure of the embodiments of the present invention, the components and settings of specific examples are described below. Of course, these are merely examples and are not intended to limit the embodiments of the present invention. In addition, the embodiments of the present invention may repeat reference numbers and / or reference letters in different examples. Such repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed.

[0034] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0035] See Figure 1-Figure 3 This embodiment discloses a heat exchanger, specifically a reciprocating spiral high-efficiency heat exchange structure, including a heat exchange plate 103, the heat exchange plate 103 is a spiral structure, and a spiral fresh air flow channel 104 is provided in the heat exchange plate 103;

[0036] A spiral hot air gap is formed between adjacent outer walls of the heat exchange plates 103. The fresh air flow channel 104 and the hot air gap together form a double helical structure arranged in a stacked and intertwined manner. The hot air gap is divided into a plurality of hot air cavities 119. Adjacent hot air cavities 119 are interconnected end to end to form a continuous S-shaped hot air flow channel 105.

[0037] The bottom end of the heat exchange plate 103 is provided with a plurality of ash collecting bins 111 for communicating with the outside world. The ash collecting bins 111 are located at the lower end of the hot air cavity 119 , and adjacent hot air cavities 119 share one ash collecting bin 111 .

[0038] In the present invention, the heat exchange plate 103 is used to be coaxially mounted on the furnace body 101, and the spiral fresh air flow channel 104 formed inside the heat exchange plate 103 and the spiral hot air gap formed between the adjacent outer walls of the heat exchange plate 103 together constitute a double helix structure arranged in a stacked and winding manner; the hot air flow channel 105 and the fresh air flow channel 104 form two independent channel units; the fresh air flow channel 104 is provided with a fresh air inlet 107 and a fresh air outlet 115 for communicating with the outside world, and the hot air flow channel 105 is provided with an exhaust air inlet for communicating with the combustion chamber 102 arranged in the furnace body 101 and an exhaust air outlet 106 for communicating with the outside world; the new The air inlet 107 is provided with a cooling fan for inputting a fresh air flow into the fresh air flow channel 104, and the exhaust fan for sucking the combustion exhaust gas is provided at the exhaust gas outlet 106; after the cooling fan inputs fresh air into the fresh air channel, a spiral fresh air flow is formed, and the fresh air flow flows from the outside to the inside toward the axial direction of the heat exchange plate 103 to the channel formed between the outer wall of the combustion chamber 102 and the heat exchange plate 103, and then is discharged through the fresh air outlet 115; the combustion exhaust gas generated when the fuel is burned in the combustion chamber 102 moves from the inside to the outside and from the top to the bottom from the combustion chamber 102 into the hot air cavity under the action of the exhaust fan, and is then discharged from the exhaust gas outlet 115 by the action of the exhaust fan. The combustion exhaust gas moves from bottom to top along the S-shaped hot air flow channel 105 to the top of any hot air cavity 119, then crosses into the adjacent hot air cavity 119 and flows downward, repeatedly moves several times to reach the outermost space of the heat exchange plate 103, and then is discharged through the exhaust air outlet 106; by making the fresh air channel spirally arranged, the path of the fresh air moving in the heat exchange plate 103 can be increased, and the heat exchange time and heat exchange area between the fresh air moving from the outside to the inside and the combustion exhaust gas moving from the inside to the outside can be further increased, thereby achieving a better heat exchange effect and further improving the thermal energy utilization efficiency; after the fresh air is heated after heat exchange with the combustion exhaust gas, the hot air is discharged from the fresh air outlet The exhaust gas is blown out of the exhaust port 115 and sent to the heat-using equipment. After heat exchange, the temperature of the exhaust gas is reduced and discharged to the external environment. By changing the flow direction of the exhaust gas generated by the combustion, the corresponding ash collection bin 111 of each spiral circle (one hot air cavity 119) of the fresh air flow channel 104 in the prior art can be changed to one ash collection bin 111 for every two spiral circles (two hot air cavities 119) of the fresh air flow channel 104, thereby reducing the number of ash collection bins 111, simplifying the manufacturing process, reducing material consumption, and facilitating ash cleaning operations. The particulate matter carried by the exhaust gas is deposited in the ash collection bin 111 by gravity as the exhaust gas moves, and can be centrally cleaned through the ash collection bin 111.By having the air cooler deliver positive pressure air into the fresh air duct and the exhaust fan draw air at negative pressure, the heat exchange plate 103 can operate at negative pressure while the fresh air system operates at positive pressure. This eliminates fire hazards caused by sparks from burning and the possibility of exhaust gas contamination of materials in special circumstances, ensuring operational safety and high practicality. In this embodiment, the air cooler and exhaust fan are both conventional devices in the prior art, and their structures and functions will not be elaborated on in detail here.

[0039] In some embodiments, the heat exchange plate 103 is connected to a plurality of partition plates, which are used to divide the hot air gap to form the hot air cavity 119. The partition plates can separate the hot air gap into the hot air cavity 119, and adjacent hot air cavities 119 are connected to each other through the partition plates to form an S-shaped hot air flow channel 105.

[0040] In some embodiments, the heat exchange plate 103 is provided with a bent portion 120. Adjacent bent portions 120, when in close contact or connection, are used to separate the hot air gap to form the hot air cavity 119. In this embodiment, there are multiple bent portions 120. When adjacent bent portions 120 are in close contact, they can separate the hot air gap into the hot air cavity 119. Adjacent hot air cavities 119 are connected to each other end to end through the partition plate to form an S-shaped hot air flow channel 105.

[0041] In some embodiments, the ash collecting bins 111 are arranged in layers from top to bottom. There are several ash collecting bins 111, and the ash collecting bins 111 are arranged in layers from bottom to bottom. The particulate matter carried by the combustion exhaust gas is deposited in the ash collecting bins 111 by gravity during the movement of the combustion exhaust gas, and can be cleaned centrally through the ash collecting bins 111.

[0042] In some embodiments, the ash bin 111 is provided with an ash cleaning port 110 for communicating with the interior of the ash bin 111. A sealing cover plate 113 is mounted on the ash cleaning port 110. When the heat exchange plate 103 is in operation, the sealing cover plate 113 can seal the ash cleaning port 110. When the heat exchange plate 103 completes heat exchange and particulate matter accumulated in the ash bin 111 needs to be cleaned, the sealing cover plate 113 can be opened to remove particulate matter from the ash bin 111 through the ash cleaning port 110 and clean the ash bin 111.

[0043] In some embodiments, the ash cleaning ports 110 are arranged at equal intervals along the circumference of the ash collecting bin 111. In this embodiment, each ash collecting bin 111 is provided with three ash cleaning ports 110 for communicating with the ash collecting bin 111. The three ash cleaning ports 110 are arranged at equal intervals along the circumference of the ash collecting bin 111, thereby enabling a user to simultaneously clean particulate matter accumulated in the ash collecting bin 111 through the three ash cleaning ports 110, further improving cleaning efficiency and cleaning effect.

[0044] In some embodiments, the heat exchange plate 103 is provided with an emergency heat exhaust port 114. The emergency heat exhaust port 114 is provided at the front end of the exhaust outlet 106. During the operation of the heat exchange plate 103, if an emergency such as excessive temperature or abnormal pressure in the furnace body 101 occurs, the emergency heat exhaust port 114 can be quickly opened to release the high-temperature gas and heat in the furnace in time, thereby reducing the temperature and pressure in the furnace, thereby avoiding damage to the heat exchange plate 103 due to overheating, or even causing safety accidents such as explosions.

[0045] In some embodiments, heat dissipation fins 116 are connected to the inner wall of the fresh air flow channel 104. The heat dissipation fins 116 are arranged horizontally and connected to the inner wall of the fresh air flow channel 104 formed in the heat exchange plate 103. The heat dissipation fins 116 can further enhance the heat exchange effect between the combustion exhaust gas and the fresh air.

[0046] In some embodiments, a cleaning port cover 112 is mounted on the heat exchange plate 103 to seal the top opening of the hot air flow channel 105. The cleaning port cover 112 is detachably connected to the heat exchange plate 103 via bolts. When the heat exchange plate 103 is in use, the cleaning port cover 112 is used to seal the hot air flow channel 105 to prevent the escape of combustion exhaust gas. After the heat exchange plate 103 completes heat exchange, the cleaning port cover 112 can be opened to clean dust adsorbed on the outer wall of the heat exchange plate 103.

[0047] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0048] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. It should be pointed out that any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A reciprocating spiral high-efficiency heat exchange structure, characterized by: The heat exchange plate (103) comprises a heat exchange plate (103), wherein the heat exchange plate (103) is a spiral structure, and a spiral fresh air flow channel (104) is provided in the heat exchange plate (103); A spiral hot air gap is formed between adjacent outer walls of the heat exchange plates (103); the fresh air flow channel (104) and the hot air gap together form a double helical structure arranged in layers and winding around each other; the hot air gap is divided to form a plurality of hot air cavities (119); adjacent hot air cavities (119) are interconnected end to end to form a continuous S-shaped hot air flow channel (105); The bottom end of the heat exchange plate (103) is provided with a plurality of ash collecting bins (111) for communicating with the outside world. The ash collecting bins (111) are located at the lower end of the hot air cavity (119), and adjacent hot air cavities (119) share one ash collecting bin (111).

2. The reciprocating spiral high-efficiency heat exchange structure according to claim 1, characterized in that: A plurality of partition plates are connected to the heat exchange plate (103), and the plurality of partition plates are used to separate the hot air gaps to form the hot air cavity (119).

3. The reciprocating spiral high-efficiency heat exchange structure according to claim 1, characterized in that: The heat exchange plate (103) is provided with a bending portion (120), and adjacent bending portions (120) are closely contacted or connected to separate the hot air gap to form the hot air cavity (119).

4. The reciprocating spiral high-efficiency heat exchange structure according to claim 1, characterized in that: The ash collecting bins (111) are arranged in layers from top to bottom.

5. The reciprocating spiral high-efficiency heat exchange structure according to claim 4, characterized in that: The ash collecting bin (111) is provided with an ash cleaning port (110) for communicating with the interior of the ash collecting bin (111), and a sealing cover plate (113) is installed on the ash cleaning port (110).

6. The reciprocating spiral high-efficiency heat exchange structure according to claim 5, characterized in that: There are a plurality of ash cleaning ports (110), and the plurality of ash cleaning ports (110) are arranged at equal intervals along the circumference of the ash collecting bin (111).

7. The reciprocating spiral high-efficiency heat exchange structure according to claim 1, characterized in that: The heat exchange plate (103) is provided with an emergency heat exhaust port (114).

8. The reciprocating spiral high-efficiency heat exchange structure according to claim 1, characterized in that: Heat dissipation fins (116) are connected to the inner wall of the fresh air flow channel (104).

9. The reciprocating spiral high-efficiency heat exchange structure according to claim 1, characterized in that: A cleaning port cover (112) for closing the top opening of the hot air flow channel (105) is installed on the heat exchange plate (103).

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