Novel energy storage type waste heat recovery heat exchanger

Abstract

The utility model discloses a novel energy storage type waste heat recovery heat exchanger which comprises a heat preservation and energy storage box body and a plurality of heat exchange tube rows, and the heat exchange tube rows are fixed in the heat preservation and energy storage box body through a support assembly. The heat exchange tube row is composed of an inner tube and a plurality of outer tubes, the inner tube is composed of a plurality of horizontal pipelines and U-shaped tube joints, the heads and the tails of the horizontal pipelines are communicated through the U-shaped tube joints to form a communication structure, the horizontal pipelines are sleeved with the outer tubes respectively, and the two ends of each outer tube are in threaded connection with sealing seats. According to the variable-cross-section pipeline, the reducing section, the maintaining section and the expanding section are sequentially connected end to end in the flowing direction of fluid in the inner pipe, so that the fluid flows in the variable-cross-section pipeline, and the heat exchange efficiency is improved through the unique variable-cross-section design. The variable cross-section design can optimize the flow path of the fluid, reduce the turbulence and thermal resistance of the fluid in the inner pipe, and further improve the heat exchange efficiency and the reaction rate.

Description

Technical Field

[0001] This invention relates to the field of heat exchanger technology, specifically to a novel energy storage waste heat recovery heat exchanger. Background Technology

[0002] A heat exchanger is a device that transfers some of the heat from a hot fluid to a cold fluid; it is also called a heat exchanger. Currently, the heat exchangers used in heat pumps on the market include plate heat exchangers, high-pressure tanks, and shell-and-tube heat exchangers. Plate heat exchangers use microchannel technology, which has very high requirements for the impurities of the heating element. Furthermore, the copper and aluminum materials commonly used in the market are highly susceptible to corrosion and oxidation, resulting in a short lifespan and failing to provide greater durability. High-efficiency tanks use capillary technology; however, copper capillaries are prone to corrosion, and they also have very high requirements for the impurities of the heating element, leading to a significant rate of degradation. Plate heat exchangers and high-efficiency tanks cannot be sized arbitrarily; their complex manufacturing processes require specialized factories to complete.

[0003] Existing shell-and-tube heat exchangers include an outer tube and an inner tube. The inner tube is placed inside the outer tube and the two tubes are coaxially arranged. The outer tube has an inlet and an outlet. When the coaxial shell-and-tube heat exchanger exchanges heat, the heat exchange medium flows from the inlet to the outlet of the outer tube, while the liquid (such as water) flows from the inlet to the outlet of the inner tube. The liquid transfers heat to the inner tube wall, and then the inner tube wall transfers heat to the heat exchange medium. The flow of the heat exchange medium carries away the heat, thereby cooling the liquid in the inner tube.

[0004] However, in existing heat exchangers, the inner diameter of the inner tubes used for liquid flow remains constant. When the fluid flows, firstly, the liquid, which flows in streams, is difficult to disperse, resulting in poor heat exchange uniformity. Secondly, the water flow will experience turbulence and thermal resistance, resulting in greater impact at the bends of the pipes, which affects the service life of the entire heat exchange tube bank. Utility Model Content

[0005] The purpose of this invention is to overcome the limitations of existing heat exchangers, where the inner diameter of the inner tube used for liquid flow remains constant. This results in poor heat exchange uniformity due to the difficulty in dispersing the flowing liquid, turbulence, and thermal resistance. Furthermore, the impact at pipe bends is significant, affecting the service life of the entire heat exchange tube bank. This invention provides a novel energy storage waste heat recovery heat exchanger. Its horizontal pipe consists of two horizontal pipe sections and a variable cross-section pipe threaded between them. The variable cross-section pipe comprises a reduced diameter section, a maintaining section, and an expanded diameter section, connected sequentially end-to-end according to the direction of fluid flow within the inner tube. This allows the liquid to flow within the variable cross-section pipe, improving heat exchange efficiency through a unique variable cross-section design. The variable cross-section design optimizes the fluid flow path, reduces turbulence and thermal resistance within the inner tube, thereby improving heat exchange efficiency and reaction rate.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] This utility model discloses a novel energy storage type waste heat recovery heat exchanger, including an insulated energy storage box and several heat exchange tube rows, wherein the several heat exchange tube rows are fixed in the insulated energy storage box by a bracket assembly.

[0008] The heat exchange tube bank consists of an inner tube and several outer tubes. The inner tube is composed of several horizontal pipes and U-shaped pipe joints. The ends of the horizontal pipes are connected by U-shaped pipe joints to form a connected structure. The outer tubes are respectively sleeved on the horizontal pipes, and the two ends of the outer tubes are threaded with sealing seats. A heat exchange cavity is formed between the inner wall of the outer tube and the outer wall of the horizontal pipe. The heat exchange cavity constitutes the heat exchange medium flow area. The liquid flows in the inner tube, and the heat exchange medium flows in the heat exchange medium flow area. The liquid flow direction is opposite to the heat exchange medium flow direction.

[0009] Preferably, the ends of several outer tubes are connected by vertical connecting pipes, so that several heat exchange chambers are interconnected. A heat exchange medium inlet pipe is connected to the outer wall of the heat-insulated energy storage box, and the bottom end of the heat exchange medium inlet pipe is connected to the heat exchange chamber through a connecting pipe.

[0010] Preferably, the support assembly includes a rectangular frame welded and fixed to the bottom plate inside the thermal storage tank. Several support brackets are welded at equal intervals along the vertical direction on the vertical end of the rectangular frame. U-shaped fixing brackets are inserted into the support brackets. It should be noted that the two vertical ends of the U-shaped fixing brackets extend through the support brackets to the lower part of the support brackets and are threaded with fixing bolts to limit and fix the U-shaped fixing brackets. The heat exchange tubes placed on the support brackets are limited and fixed by the U-shaped fixing brackets.

[0011] Preferably, a liquid inlet pipe is provided on the outer wall of the thermal insulation energy storage box. The liquid inlet pipe is connected to the inner pipe and is used to transport the liquid to be heat exchanged. In use, the liquid to be heat exchanged can be input into the inner pipe through the liquid inlet pipe 34 for heat exchange.

[0012] Preferably, the horizontal pipe consists of two horizontal pipe sections and a variable cross-section pipe threaded between the two horizontal pipe sections. The variable cross-section pipe is electrically connected to the two horizontal pipe sections. The variable cross-section pipe consists of a reduced diameter section, a maintaining section, and an expanded diameter section. The reduced diameter section, maintaining section, and expanded diameter section are connected end to end in accordance with the direction of fluid flow in the inner pipe, thereby allowing the liquid to flow in the variable cross-section pipe. The unique variable cross-section design improves the heat exchange efficiency. The variable cross-section design can optimize the fluid flow path, reduce turbulence and thermal resistance in the inner pipe, and thus improve the heat exchange efficiency and reaction rate.

[0013] Preferably, a flow-blocking and dispersing component is provided within the expansion section. This component comprises a conical dispersing disc, a first flow-blocking ring, and a second flow-blocking ring. The second flow-blocking ring is welded and fixed to the outer wall of the expansion section, and the first flow-blocking ring is welded and fixed to the second flow-blocking ring via a connecting rod. The conical dispersing disc is welded and fixed to the first flow-blocking ring via a connecting rod. By providing this flow-blocking and dispersing component within the expansion section, the liquid flowing through the contraction section and the maintenance section will increase its velocity and collide with the conical dispersing disc, thereby dispersing the flowing liquid and improving the uniformity of heat exchange. Furthermore, the first and second flow-blocking rings further disperse and obstruct the liquid, reducing its velocity and improving its heat exchange effect.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] This novel energy storage waste heat recovery heat exchanger consists of two horizontal pipe sections and a variable cross-section pipe threaded between them. The variable cross-section pipe comprises a reduced-diameter section, a maintaining section, and an expanded-diameter section, which are connected end-to-end according to the direction of fluid flow within the inner pipe. This allows the liquid to flow within the variable cross-section pipe, and the unique variable cross-section design improves heat exchange efficiency. The variable cross-section design optimizes the fluid flow path, reduces turbulence and thermal resistance within the inner pipe, thereby improving heat exchange efficiency and reaction rate.

[0016] Secondly, a flow-blocking and dispersing component is installed in the expansion section. The flow-blocking and dispersing component consists of a conical dispersing disk, a first flow-blocking ring, and a second flow-blocking ring. When the liquid passes through the reduction section and the maintenance section, its flow velocity increases and it contacts the conical dispersing disk, thereby dispersing the liquid in streams and improving the uniformity of heat exchange. Furthermore, the first and second flow-blocking rings can further disperse and block the liquid, reduce its flow velocity, improve its heat exchange effect, reduce the impact force at the inner tube bend, and increase the service life of the entire heat exchange tube bank. Attached Figure Description

[0017] Figure 1 This is a cross-sectional view of the overall structure of this utility model;

[0018] Figure 2 In this utility model Figure 1 Enlarged view of area A in the middle;

[0019] Figure 3 This is a schematic diagram of the heat exchange tube bank in this utility model;

[0020] Figure 4 This is a cross-sectional view of the outer tube in this utility model;

[0021] Figure 5This is a cross-sectional view of the horizontal pipe in this utility model.

[0022] Reference numerals: 1. Insulated energy storage tank; 11. Heat exchange medium inlet pipe; 2. Support assembly; 21. Rectangular frame; 22. Support frame; 23. U-shaped fixing frame; 3. Heat exchange tube bank; 31. Horizontal pipe; 311. Reduction section; 312. Maintaining section; 313. Expansion section; 314. Flow obstruction and dispersion assembly; 315. Conical dispersion disc; 316. First flow obstruction ring; 317. Second flow obstruction ring; 318. Connecting rod; 32. Outer pipe; 320. Heat exchange chamber; 321. Sealing seat; 33. U-shaped pipe joint; 34. Liquid inlet pipe; 35. Guide pipe; 351. Vertical connecting pipe. Detailed Implementation

[0023] The following is in conjunction with the appendix Figure 1 -Appendix Figure 5 This invention further illustrates the specific implementation of a novel energy storage waste heat recovery heat exchanger. It overcomes the limitations of existing heat exchangers where the inner diameter of the inner tube used for liquid flow remains constant. This results in poor heat exchange uniformity due to the difficulty in dispersing the flowing liquid, turbulence, and thermal resistance, leading to significant impact at pipe bends and affecting the lifespan of the entire heat exchange tube bank. The invention provides a novel energy storage waste heat recovery heat exchanger whose horizontal pipe consists of two horizontal pipe sections and a variable cross-section pipe threaded between them. The variable cross-section pipe comprises a reduced diameter section, a maintaining section, and an expanded diameter section, connected sequentially end-to-end according to the direction of fluid flow within the inner tube. This allows the liquid to flow within the variable cross-section pipe, improving heat exchange efficiency through a unique variable cross-section design. The variable cross-section design optimizes the fluid flow path, reduces turbulence and thermal resistance within the inner tube, thereby improving heat exchange efficiency and reaction rate.

[0024] Example 1

[0025] A novel energy storage waste heat recovery heat exchanger includes an insulated energy storage box 1 and several heat exchange tube rows 3, which are fixed inside the insulated energy storage box 1 by a bracket assembly 2.

[0026] The heat exchange tube array 3 consists of an inner tube and several outer tubes 32. The inner tube is composed of several horizontal pipes 31 and U-shaped pipe joints 33. The ends of the several horizontal pipes 31 are connected by U-shaped pipe joints 33 to form a connected structure. The several outer tubes 32 are respectively sleeved on the several horizontal pipes 31, and the two ends of the outer tubes 32 are threaded with sealing seats 321. The inner wall of the outer tubes 32 and the outer wall of the horizontal pipes 31 form a heat exchange cavity 320. The heat exchange cavity 320 constitutes the heat exchange medium flow area. The liquid flows in the inner tube, and the heat exchange medium flows in the heat exchange medium flow area. The liquid flow direction is opposite to the heat exchange medium flow direction.

[0027] Several outer tubes 32 are connected end to end by vertical connecting pipes 351, so that several heat exchange chambers 320 are interconnected. A heat exchange medium inlet pipe 11 is connected to the outer wall of the heat storage box 1. The bottom end of the heat exchange medium inlet pipe 11 is connected to the heat exchange chamber 320 through a connecting pipe 35.

[0028] The support assembly 2 includes a rectangular frame 21 welded and fixed to the bottom plate inside the thermal storage box 1. Several support frames 22 are welded at equal intervals along the vertical direction on the vertical end of the rectangular frame 21. U-shaped fixing frames 23 are inserted into the support frames 22. It should be noted that the two vertical ends of the U-shaped fixing frames 23 pass through the support frames 22 and extend to the lower part of the support frames 22, and are threaded with fixing bolts to limit and fix the U-shaped fixing frames 23. The heat exchange tube array 3 placed on the support frames 22 is limited and fixed by the U-shaped fixing frames 23.

[0029] A liquid inlet pipe 34 is provided on the outer wall of the insulated energy storage tank 1. The liquid inlet pipe 34 is electrically connected to the inner pipe and is used to transport the liquid to be exchanged. In use, the liquid to be exchanged can be introduced into the inner pipe through the liquid inlet pipe 34 for heat exchange.

[0030] Example 2: Based on the above examples, this example further discloses the specific structural design of the horizontal pipe 31, wherein the horizontal pipe 31 is composed of two horizontal pipes and a variable cross-section pipe threaded between the two horizontal pipes, and a flow-blocking and dispersing component 314 is provided in the enlarged diameter section 313.

[0031] The horizontal pipe 31 consists of two horizontal pipe sections and a variable cross-section pipe threaded between the two horizontal pipe sections. The variable cross-section pipe is electrically connected to the two horizontal pipe sections. The variable cross-section pipe consists of a reduced diameter section 311, a maintaining section 312, and an expanded diameter section 313. The reduced diameter section 311, the maintaining section 312, and the expanded diameter section 313 are connected end to end in accordance with the direction of fluid flow in the inner pipe, so that the liquid flows in the variable cross-section pipe. The unique variable cross-section design improves the heat exchange efficiency. The variable cross-section design can optimize the fluid flow path, reduce turbulence and thermal resistance in the inner pipe, and thus improve the heat exchange efficiency and reaction rate.

[0032] The expansion section 313 is equipped with a flow-blocking and dispersing component 314, which consists of a conical dispersing disk 315, a first flow-blocking ring 316, and a second flow-blocking ring 317. The second flow-blocking ring 317 is welded and fixed to the outer wall of the expansion section 313, the first flow-blocking ring 316 is welded and fixed to the second flow-blocking ring 317 via a connecting rod 318, and the conical dispersing disk 315 is welded and fixed to the first flow-blocking ring 316 via a connecting rod 318.

[0033] By providing a flow-blocking and dispersing component 314 in the expansion section 313, the liquid passing through the contraction section 311 and the holding section 312 will increase its flow velocity and collide with the conical dispersing disk 315, thereby dispersing the liquid flowing in streams and improving the uniformity of its heat exchange. Furthermore, by setting the first flow-blocking ring 316 and the second flow-blocking ring 317, the liquid can be further dispersed and blocked, its flow velocity can be reduced, and its heat exchange effect can be improved.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A novel energy storage waste heat recovery heat exchanger, characterized in that, It includes an insulated energy storage box (1) and several heat exchange tube rows (3), and the several heat exchange tube rows (3) are fixed inside the insulated energy storage box (1) by a bracket assembly (2); The heat exchange tube bank (3) consists of an inner tube and several outer tubes (32). The inner tube consists of several horizontal pipes (31) and U-shaped pipe joints (33). The ends of the several horizontal pipes (31) are connected by U-shaped pipe joints (33) to form a connected structure. The several outer tubes (32) are respectively sleeved on the several horizontal pipes (31), and the two ends of the outer tubes (32) are threaded with sealing seats (321). The inner wall of the outer tube (32) and the outer wall of the horizontal pipes (31) form a heat exchange cavity (320). The heat exchange cavity (320) constitutes the heat exchange medium flow area. The liquid flows in the inner tube, and the heat exchange medium flows in the heat exchange medium flow area. The liquid flow direction is opposite to the heat exchange medium flow direction. The horizontal pipe (31) consists of two horizontal pipe sections and a variable cross-section pipe threaded between the two horizontal pipe sections. The variable cross-section pipe is connected to the two horizontal pipe sections. The variable cross-section pipe consists of a reduced diameter section (311), a maintaining section (312), and an expanded diameter section (313). The reduced diameter section (311), the maintaining section (312), and the expanded diameter section (313) are connected end to end in sequence according to the direction of fluid flow in the inner pipe. The expansion section (313) is provided with a flow-blocking and dispersing component (314), which consists of a conical dispersing disk (315), a first flow-blocking ring (316), and a second flow-blocking ring (317). The second flow-blocking ring (317) is welded and fixed to the outer wall of the expansion section (313), the first flow-blocking ring (316) is welded and fixed to the second flow-blocking ring (317) by a connecting rod (318), and the conical dispersing disk (315) is welded and fixed to the first flow-blocking ring (316) by a connecting rod (318).

2. The novel energy storage waste heat recovery heat exchanger according to claim 1, characterized in that, Several outer tubes (32) are connected end to end by vertical connecting pipes (351), so that several heat exchange chambers (320) are interconnected. A heat exchange medium inlet pipe (11) is connected to the outer wall of the heat-insulating energy storage box (1). The bottom end of the heat exchange medium inlet pipe (11) is connected to the heat exchange chamber (320) through a connecting pipe (35).

3. The novel energy storage waste heat recovery heat exchanger according to claim 1, characterized in that, The support assembly (2) includes a rectangular frame (21) welded and fixed to the bottom plate inside the thermal insulation energy storage box (1). Several support frames (22) are welded at equal intervals along the vertical direction on the vertical end of the rectangular frame (21). U-shaped fixing frames (23) are inserted into the support frames (22).

4. A novel energy storage waste heat recovery heat exchanger according to claim 3, characterized in that, The outer wall of the thermal insulation energy storage box (1) is provided with a liquid inlet pipe (34), which is connected to the inner pipe and is used to transport the liquid to be heat exchanged.

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