A secondary cross-flow high-efficiency waste heat recovery heat exchanger

Abstract

The present invention relates to a secondary cross-flow high-efficiency waste heat recovery heat exchanger, which belongs to the field of heat exchangers. The heat exchanger includes a housing, the periphery of which is provided with a plurality of flange openings. The housing is divided into a first chamber and a second chamber by a profile. A hot medium inlet is provided on the left side of the first chamber, and a cold medium outlet is provided on the front side of the first chamber; a cold medium inlet is provided on the front side of the second chamber, and a hot medium outlet is provided on the right side of the second chamber; wherein the U-shaped circulation path of the cold medium intersects the circulation path of the hot medium. The present invention transforms the heat exchange form of the heat exchanger from the original cross-flow to a combination of cross-flow and counter-flow, greatly improving the value of the temperature difference correction and ultimately improving the heat exchange efficiency of the product. In addition, the pipeline layout is relatively compact and occupies little space.

Description

Technical Field

[0001] The invention relates to a secondary cross-flow high-efficiency waste heat recovery heat exchanger, belonging to the field of heat exchangers. Background Art

[0002] Existing products use a pure cross-flow structure. When the efficiency reaches 80%, the heat exchange capacity of the rear part of the flow channel is very poor. In this case, increasing the heat exchange area will have little effect on its heat exchange effect. Products using a pure countercurrent structure can improve the recovery efficiency, but because a guide structure is required to realize the countercurrent, the heat exchange capacity of the guide structure is poor, which results in a low performance ratio of the product. Summary of the Invention

[0003] The object of the present invention is to overcome the above-mentioned shortcomings and provide a secondary cross-flow high-efficiency waste heat recovery heat exchanger, comprising a box body, a plurality of flange openings are provided on the periphery of the box body, and the box body is divided into a first chamber and a second chamber by a profile. A hot medium inlet is provided on the left side of the first chamber, and a cold medium outlet is provided on the front side of the first chamber; a cold medium inlet is provided on the front side of the second chamber, and a hot medium outlet is provided on the right side of the second chamber;

[0004] A first fin is provided in each of the first cavity and the second cavity, and a second fin is further provided in the box. The second fin penetrates the profile to connect the first cavity and the second cavity. The first fin and the second fin located in the same cavity are arranged in a cross-layered manner.

[0005] The cold medium inlet is connected to the first fin in the second chamber, the cold medium outlet is connected to the first fin in the first chamber, and the first fins in the first chamber and the second chamber are connected by a U-shaped pipe; the hot medium inlet and the hot medium outlet are connected to one end of the second fin.

[0006] As a further improvement of the present invention, the arrangement of the first fins and the second fins is that second fins are respectively provided at the top and bottom ends of the first chamber, and the second fins at different levels are separated by the first fins; the arrangement of the fins in the second chamber is the same as that in the first chamber.

[0007] As a further improvement of the present invention, a seal is provided between the first fin and the profile.

[0008] As a further improvement of the present invention, the material used for the profile is aluminum.

[0009] As a further improvement of the present invention, the profile is connected to the inner wall of the box to separate the first chamber and the second chamber into two chambers that are not interconnected.

[0010] The beneficial effects of the present invention are:

[0011] By separating the flow channels in the pipeline through the opening of the profile, a dual flow process is realized, so that the heat exchange form of the heat exchanger is transformed from the original cross flow to a combination of cross and counterflow, which greatly improves the value of temperature difference correction and ultimately improves the heat exchange efficiency of the product. The pipeline layout is relatively compact and occupies little space. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0013] Figure 2 It is a cross-sectional view of the present invention.

[0014] Figure 3 for Figure 2 A partial enlarged view of part A.

[0015] Figure 4 This is a schematic diagram of the present invention.

[0016] Explanation of the accompanying symbols: 1. Box body; 2. Hot medium inlet; 3. Cold medium outlet; 4. Hot medium outlet; 5. Cold medium inlet; 6. First fin; 7. Second fin; 8. Seal; 9. Profile; 10. Flange; 11. First chamber; 12. Second chamber; 13. U-shaped pipe. DETAILED DESCRIPTION

[0017] The present invention will be further described below with reference to the embodiments in the accompanying drawings:

[0018] As shown in the figure, a secondary cross-flow high-efficiency waste heat recovery heat exchanger includes a housing 1. The outer periphery of the housing 1 is provided with multiple flange openings 10 for connecting to cold medium or hot medium pipelines. The housing 1 is divided into a first chamber 11 and a second chamber 12 by a profile 9. A hot medium inlet 2 is provided on the left side of the first chamber 11, and a cold medium outlet 3 is provided on the front side of the first chamber 11; a cold medium inlet 5 is provided on the front side of the second chamber 12, and a hot medium outlet 4 is provided on the right side of the second chamber 12;

[0019] The first chamber 11 and the second chamber 12 are both provided with first fins 6. The box body 11 is also provided with second fins 7. The second fins 7 penetrate the profile 9 to connect the first chamber 11 and the second chamber 12. The first fins 6 and the second fins 7 located in the same chamber are cross-layered.

[0020] The cold medium inlet 5 is connected to the first fin 6 in the second chamber 12, and the cold medium outlet 3 is connected to the first fin 6 in the first chamber 11. The first fins 6 in the first chamber 11 and the second chamber 12 are connected via a U-shaped pipe 13. Figure 4 As shown, the U-shaped pipe 13 is only used to connect the first chamber and the second chamber, and is only shown in the figure; the heat medium inlet 2 and the heat medium outlet 4 are connected to one end of the second fin 7;

[0021] During circulation, the circulation path of the cold medium and the circulation path of the hot medium form a cross countercurrent, which can effectively utilize the waste heat to achieve the purpose of waste heat recovery and improve heat exchange efficiency.

[0022] The first fins 6 and the second fins 7 are arranged in such a manner that the second fins 7 are respectively provided at the top and bottom ends of the first chamber 11, and the second fins 7 at different levels are separated by the first fins 6; the arrangement of the fins in the second chamber 12 is the same as that in the first chamber 11; the first fins 6 for carrying the cooling medium clamp the second fins 7 for carrying the heating medium up and down, which can fully exchange heat and prevent heat loss.

[0023] A sealing strip 8 is provided between the first fin 6 and the profile 9 to facilitate fixing the first fin 6 and prevent displacement and uneven heat exchange.

[0024] The material used for the profile 9 is aluminum; the profile 9 is connected to the inner wall of the box body 1 to separate the first chamber 11 and the second chamber 12 into two non-interconnected chambers. The heat transfer performance of aluminum is good, which is conducive to the utilization of waste heat.

[0025] The working process and principle of the present invention are as follows: Figure 4 As shown, the cold medium inlet is close to the hot medium outlet, and the cold medium outlet is close to the hot medium inlet. When the heat exchanger is running, the hot medium first heats the cold medium in the first chamber, and then the hot medium in the second chamber heats the cold medium again. That is, the waste heat of the hot air at the rear end can be effectively utilized. The hot air at the rear end first exchanges heat with the cold air to preheat the cold air, ensuring that there is a certain temperature difference between the media on both sides and effectively utilizing the waste heat for heat exchange.

Claims

1. A secondary cross-flow high-efficiency waste heat recovery heat exchanger, comprising a box body (1), wherein a plurality of flange openings (10) are provided on the periphery of the box body (1), characterized in that: The box body (1) is divided into a first chamber (11) and a second chamber (12) by a profile (9); a hot medium inlet (2) is provided on the left side of the first chamber (11), and a cold medium outlet (3) is provided on the front side of the first chamber (11); a cold medium inlet (5) is provided on the front side of the second chamber (12), and a hot medium outlet (4) is provided on the right side of the second chamber (12); A first fin (6) is provided in each of the first chamber (11) and the second chamber (12); a second fin (7) is further provided in the box body (1); the second fin (7) passes through the profile (9) to connect the first chamber (11) and the second chamber (12); the first fin (6) and the second fin (7) located in the same chamber are cross-layered; The cold medium inlet (5) is connected to the first fin (6) in the second chamber (12), the cold medium outlet (3) is connected to the first fin (6) in the first chamber (11), and the first fins (6) in the first chamber (11) and the second chamber (12) are connected via a U-shaped pipe (13); the hot medium inlet (2) and the hot medium outlet (4) are connected to one end of the second fin (7); The material used for the profile (9) is aluminum; The profile (9) is connected to the inner wall of the box body (1) to separate the first chamber (11) and the second chamber (12) into two chambers that are not interconnected.

2. The secondary cross-flow high-efficiency waste heat recovery heat exchanger according to claim 1, characterized in that: The first fins (6) and the second fins (7) are arranged in such a manner that the second fins (7) are respectively provided at the top and the bottom of the first chamber (11), and the second fins (7) at different levels are separated by the first fins (6); the arrangement of the fins in the second chamber (12) is the same as that in the first chamber (11).

3. The secondary cross-flow high-efficiency waste heat recovery heat exchanger according to claim 2, characterized in that: A seal (8) is provided between the first fin (6) and the profile (9).

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