A regenerative heat exchanger

Abstract

The utility model provides a heat accumulating type heat exchange device, which comprises a tank body, first baffles and second baffles are installed on both sides of the tank body in sequence, an outer pipe is installed in the tank body, the outer periphery of the outer pipe and the inner wall of the tank body form a first cavity, an inner pipe is fixedly installed in the inner part of the outer pipe, the inner pipe and the outer pipe are fixedly connected through an annular plate, the outer periphery of the inner pipe and the inner periphery of the outer pipe and the left side of the annular plate form a second cavity, the inner periphery of the inner pipe is a third cavity, the first cavity and the third cavity are both provided with honeycomb heat accumulating plates, a plurality of flue gas inlets are formed in the first baffle and communicated with the first cavity, a flue gas outlet is formed in the first baffle and communicated with the third cavity, and a plurality of fuel gas outlets are formed in the first baffle and communicated with the second cavity. The utility model has the advantages of simple structure, ingenious design, prolonged residence time of flue gas and fuel gas in the tank body, sufficient heat exchange, sufficient preheating of fuel gas, better preheating effect, actual demand satisfaction, and suitability for promotion.

Description

Technical Field

[0001] This utility model belongs to the field of heat storage and heat exchange devices, specifically a heat storage heat exchange device. Background Technology

[0002] Regenerative thermal combustion (RTC) technology, developed in the 1980s, is a highly efficient technology for recovering waste heat from high-temperature flue gas. This technology offers significant advantages in improving the thermal efficiency of furnaces, reducing pollutant emissions, and expanding the application of low-energy fuels. Its high efficiency, energy saving, and environmental friendliness have gained widespread recognition in the industrial furnace industry, sparking a revolution in combustion technology and playing a significant role in promoting global energy conservation, comprehensive utilization, and environmental protection. Some RTC devices are used to preheat fuel gas; when the gas temperature is low, the low-temperature gas is prone to inefficient combustion. Insufficient heat exchange leads to low combustion efficiency and serious waste of gas energy. Preheating the gas increases its temperature, which can improve combustion efficiency and reduce waste of gas energy. Patent CN221649292U, entitled "A Heat Storage and Heat Exchange Device and a Novel Steel Ladle Baking Device", discloses a heat storage and heat exchange device. However, when using this device, the residence time of flue gas and gas in the device is too short, which cannot allow the flue gas and gas to exchange heat sufficiently, thus affecting the preheating effect of the gas. Therefore, we designed a heat storage and heat exchange device that can improve the preheating effect of the gas. Utility Model Content

[0003] This invention provides a regenerative heat exchange device to overcome the deficiencies in the prior art.

[0004] This utility model is achieved through the following technical solution:

[0005] A regenerative heat exchange device includes a tank. A first baffle and a second baffle are sequentially installed on both sides of the tank. An outer tube is installed inside the tank. The outer circumference of the outer tube and the inner wall of the tank form a first cavity. An inner tube is fixedly installed inside the outer tube. The inner tube and the outer tube are fixedly connected by an annular plate. The outer circumference of the inner tube, the inner circumference of the outer tube, and the left side of the annular plate form a second cavity. The inner circumference of the inner tube is a third cavity. A honeycomb heat storage plate is provided in both the first and third cavities. Several flue gas inlets communicating with the first cavity are opened on the first baffle. Several flue gas outlets communicating with the third cavity are opened on the first baffle. Several gas outlets communicating with the second cavity are opened on the first baffle. A first through hole communicating with the third cavity is opened on the second baffle. Several second through holes communicating with the third cavity are opened on the second baffle. The second through holes corresponding to the first through holes are connected by connecting pipes. Several gas inlets are opened on the annular plate. Pipes are connected to the corresponding gas inlets and extend out of the second baffle. Spiral blades are fixedly installed in the second cavity.

[0006] As described above, in a heat storage heat exchange device, flanges are fixedly installed on both sides of the tank body, and bolt through holes are opened on the flanges, the first baffle, and the second baffle. The outer tube and the inner tube are both fixedly installed on the first baffle.

[0007] As described above, in a heat storage heat exchange device, the first cavity is filled with several fan-shaped honeycomb heat storage plates.

[0008] As described above, in a heat storage heat exchange device, the third cavity is filled with a cylindrical honeycomb heat storage plate.

[0009] As described above, in a heat storage heat exchange device, the honeycomb heat storage plate is made of mullite ceramic heat storage material.

[0010] As described above, in a regenerative heat exchange device, the flue gas inlet is connected to the outside.

[0011] The advantages of this utility model are: it has a simple structure and ingenious design, which can extend the residence time of flue gas and fuel gas in the tank, allowing for sufficient heat exchange and preheating of the fuel gas to achieve a better preheating effect, thus meeting practical needs and being suitable for widespread application. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art 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 based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 yes Figure 1 View from direction A; Figure 3 This is a schematic diagram of the honeycomb heat storage plate in this utility model; Figure 4 yes Figure 1 View B.

[0014] Reference numerals: 1. Tank body; 2. First baffle; 3. Second baffle; 4. Outer pipe; 5. Inner pipe; 6. First cavity; 7. Second cavity; 8. Annular plate; 9. Flue gas inlet; 10. First through hole; 11. Gas inlet; 12. Pipe; 13. Second through hole; 14. Connecting pipe; 15. Spiral blade; 16. Third cavity; 17. Honeycomb heat storage plate; 18. Flue gas outlet; 19. Gas outlet; 20. Flange; 21. Bolt through hole; 22. Reserved hole. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments 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.

[0016] A regenerative heat exchange device, such as Figure 1 , 2As shown in Figures 3 and 4, the system includes a tank body 1. A first baffle 2 and a second baffle 3 are sequentially installed on both sides of the tank body 1. An outer tube 4 is installed inside the tank body 1. The outer periphery of the outer tube 4 and the inner wall of the tank body 1 form a first cavity 6. An inner tube 5 is fixedly installed inside the outer tube 4. The two ends of the outer tube 4 and the inner tube 5 are in close contact with the first baffle 2 and the second baffle 3, respectively. The inner tube 5 and the outer tube are fixedly connected by an annular plate 8. The inner side of the annular plate 8 is fixedly connected to the inner tube 5, and the outer periphery of the annular plate 8 is fixedly connected to the outer tube. The inner circumference of the inner tube 5 is fixedly connected to the outer circumference of the outer tube 4 and the left side of the annular plate 8 to form the second cavity 7. The inner circumference of the inner tube 5 is the third cavity 16. Both the first cavity 6 and the third cavity 16 are equipped with honeycomb heat storage plates 17. Several flue gas inlets 9 communicating with the first cavity 6 are opened on the first baffle 2. Flue gas outlets 18 communicating with the third cavity 16 are opened on the first baffle 2. Several gas outlets 19 communicating with the second cavity 7 are opened on the first baffle 3. A first through hole 10 communicating with the third cavity 16 is provided. Several second through holes 13 communicating with the third cavity 16 are provided on the second baffle 3. The second through holes 13 correspond one-to-one with the first through holes 10. The second through holes 13 corresponding to the first through holes 10 are connected by a connecting pipe 14. The connecting pipe 14 is fixedly installed on the second baffle 3. One end of the connecting pipe 14 is connected to the first through hole 10, and the other end of the connecting pipe 14 is connected to the second through hole 13. Several gas inlets 11 are provided on the annular plate 8. Pipes 12 are connected to the corresponding gas inlets 11. Pipes 12 are fixedly installed on the annular plate 8 and are connected to the second cavity 7 through the gas inlets 11. Pipes 12 extend out of the second baffle 3. The second baffle 3 is provided with a reserved hole 22. Pipes 12 are slidably installed in the reserved hole 22. A spiral blade 15 is fixedly installed in the second cavity 7. The inner circumference of the spiral blade 15 is fixedly connected to the outer circumference of the inner tube 5, and the outer circumference of the spiral blade 15 is fixedly connected to the inner circumference of the outer tube 4. This utility model has a simple structure and ingenious design. It can extend the residence time of flue gas and fuel gas in the tank 1, allowing for sufficient heat exchange and preheating of the fuel gas to achieve a better preheating effect. It can meet practical needs and is suitable for widespread application. When using this invention, hot flue gas enters the first cavity 6 through the flue gas inlet 9, and then enters the third cavity 16 through the first through hole 10 and the connecting pipe 14. It flows in the third cavity 16. During the flow, the heat of the flue gas remains inside the honeycomb heat storage plate 17. The cooled gas is finally discharged from the flue gas outlet 18, which prolongs the flow time of the flue gas in the tank 1. At the same time, the gas to be heated enters the second cavity 7 through the pipe 12 and the gas inlet 11, and flows in a spiral manner along the spiral blades 15, which prolongs the residence time of the gas in the tank 1. During this process, the gas can fully exchange heat with the hot flue gas or the gas can fully absorb the heat in the honeycomb heat storage plate 17, so as to fully preheat the gas and make full use of the heat of the hot flue gas to achieve a better preheating effect. The preheated gas is discharged from the gas outlet.

[0017] Specifically, as shown in the figure, flanges 20 are fixedly installed on both sides of the tank 1 in this embodiment. Bolt through holes 21 are provided on the flanges 20, the first baffle 2, and the second baffle 3. The outer tube 4 and the inner tube 5 are fixedly installed on the first baffle 2. Bolts are inserted into the bolt through holes 21 to connect the flanges 20 to the first baffle 2 and the second baffle 3. When it is necessary to clean the inside of the tank 1, the first baffle 2 or the second baffle 3 can be removed to facilitate cleaning the inside of the tank 1.

[0018] Specifically, as shown in the figure, in this embodiment, the first cavity 6 is filled with several fan-shaped honeycomb heat storage plates 17, which can be assembled into a ring-shaped honeycomb heat storage plate. When replacing the honeycomb heat storage plate 17, the fan-shaped honeycomb heat storage plates 17 can be removed one by one from the first cavity 6, and the honeycomb heat storage plate 17 can be replaced individually by removing the first baffle 2 or the second baffle 3 from the tank body 1, thus connecting the first cavity 6 to the outside, at which point the honeycomb heat storage plate 17 can be replaced.

[0019] Furthermore, as shown in the figure, the third cavity 16 in this embodiment is filled with a cylindrical honeycomb heat storage plate 17. When it is necessary to replace the cylindrical honeycomb heat storage plate 17, the first baffle 2 or the second baffle 3 is removed from the tank body 1, exposing the inner tube 5 to the outside, so that the cylindrical honeycomb heat storage plate 17 in the third cavity 16 can be replaced.

[0020] Furthermore, as shown in the figure, the honeycomb heat storage plate 17 described in this embodiment is made of mullite ceramic heat storage material. Mullite ceramic heat storage material has a large heat storage capacity and good thermal conductivity, which can improve the heat storage effect and thus improve the heat exchange effect between flue gas and fuel gas.

[0021] Furthermore, as shown in the figure, the flue gas inlet 9 in this embodiment is connected to the outside. The hot flue gas at the flue gas inlet 9 can come from various sources, such as the high-temperature flue gas generated during the combustion process of an industrial boiler or the high-temperature flue gas generated during the combustion of a hot blast stove. The collection device continuously feeds the hot flue gas into the tank 1, constantly pushing the high-temperature flue gas to move within the tank 1.

[0022] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A heat storage heat exchange device, comprising a tank (1), a first baffle (2) and a second baffle (3) sequentially installed on both sides of the tank (1), an outer tube (4) installed inside the tank (1), the outer periphery of the outer tube (4) and the inner wall of the tank (1) forming a first cavity (6), an inner tube (5) fixedly installed inside the outer tube (4), the inner tube (5) and the outer tube being fixedly connected by an annular plate (8), the outer periphery of the inner tube (5) and the inner periphery of the outer tube (4) and the left side of the annular plate (8) forming a second cavity (7), the inner periphery of the inner tube (5) being a third cavity (16), and a honeycomb heat storage plate (17) provided in both the first cavity (6) and the third cavity (16), characterized in that: The first baffle (2) has several flue gas inlets (9) communicating with the first cavity (6), the first baffle (2) has a flue gas outlet (18) communicating with the third cavity (16), the first baffle (2) has several gas outlets (19) communicating with the second cavity (7), the second baffle (3) has a first through hole (10) communicating with the third cavity (16), the second baffle (3) has several second through holes (13) communicating with the third cavity (16), the second through holes (10) and the second through holes (13) corresponding to the first through holes (10) are connected by a connecting pipe (14), the annular plate (8) has several gas inlets (11), the corresponding gas inlets (11) are connected to the pipes (12), the pipes (12) extend out of the second baffle (3), and the spiral blades (15) are fixedly installed in the second cavity (7).

2. The regenerative heat exchanger according to claim 1, characterized in that: Flanges (20) are fixedly installed on both sides of the tank (1). Bolt through holes (21) are opened on the flanges (20), the first baffle (2), and the second baffle (3). The outer tube (4) and the inner tube (5) are fixedly installed on the first baffle (2).

3. The regenerative heat exchanger according to claim 2, characterized in that: The first cavity (6) is filled with several fan-shaped honeycomb heat storage plates (17).

4. A regenerative heat exchanger according to claim 2, characterized in that: The third cavity (16) is filled with a cylindrical honeycomb heat storage plate (17).

5. A regenerative heat exchanger according to claim 1, characterized in that: The honeycomb heat storage plate (17) is made of mullite ceramic heat storage material.

6. A regenerative heat exchanger according to claim 1, characterized in that: The flue gas inlet (9) is connected to the outside.

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