Compact honeycomb structure countercurrent heat exchanger

Abstract

Compared with the prior art, a heat exchange core body is formed by arranging polygonal heat exchange pipes towards the periphery in a matrix mode, the cross section of the heat exchange core body is of a honeycomb structure, a non-mixed heat exchange mode is adopted, and cold fluid and hot fluid flow in the adjacent heat exchange pipes respectively. A countercurrent flow heat exchange flowing mode is adopted, the heat exchange core body comprises a flow guide section and a heat exchange section, the heat transfer end difference of the heat exchanger is reduced, the heat source utilization efficiency is improved, meanwhile, the heat exchange core body is of a honeycomb structure, the heat exchange surface density of the heat exchanger is greatly increased, the compactness of the heat exchanger is improved, and the heat exchanger is used for gas-gas, gas-liquid heat exchange and liquid-liquid heat exchange. The space size of the heat exchanger is limited; and a full-welding sealing mode is adopted, so that zero leakage can be realized, and the aim of the utility model is fulfilled.

Description

Technical Field

[0001] The utility model relates to a heat exchange device, in particular to a compact honeycomb structure countercurrent heat exchanger. Background Art

[0002] Heat exchangers are devices that realize heat exchange between cold and hot fluids. Currently, shell and tube heat exchangers are most widely used in heavy industries such as power generation, chemical industry, and metallurgy.

[0003] The shell and tube heat exchanger is composed of heat exchange tubes, baffles, end plates and shells, and can withstand very high pressures and temperatures. The tube side of the shell and tube heat exchanger is a non-mixed medium, and the shell side is a mixed medium. The flow form is mainly cross-flow heat exchange. According to heat transfer theory, non-mixed medium flow heat exchange is better than mixed medium flow heat exchange, and counter-flow heat exchange is better than cross-flow heat exchange. Therefore, there is room for further optimization of the shell and tube heat exchanger. The optimization direction is to use non-mixed heat exchange flow for both heat exchange media and counter-flow heat exchange for both fluids.

[0004] At the same time, shell and tube heat exchangers also have problems such as loose arrangement of heat exchange tubes, large size, and low heat exchange efficiency, so they also need to be optimized towards a compact structural layout. For aerospace, automotive engines, and occasions where heat exchanger installation space is limited, heat exchangers need to have a very compact arrangement of heat exchange tubes or heat exchange surfaces, so the optimization of shell and tube heat exchangers has been pointed out.

[0005] Therefore, there is a particular need for a compact honeycomb structure counterflow heat exchanger to solve the above-mentioned existing problems. Utility Model Content

[0006] The purpose of the utility model is to provide a compact honeycomb structure counterflow heat exchanger, which aims to overcome the shortcomings of the existing shell and tube heat exchanger such as low heat exchange efficiency and large size, greatly increase the heat exchange surface density of the heat exchanger, and improve the compactness and heat exchange efficiency of the heat exchanger.

[0007] The technical problem solved by the present invention can be achieved by adopting the following technical solutions:

[0008] A compact honeycomb countercurrent heat exchanger, comprising a honeycomb heat exchange core, a heat exchange section shell and a guide section shell; the honeycomb heat exchange core is composed of polygonal heat exchange tubes arranged in a matrix, cold and hot fluids are countercurrently exchanged, the hot fluid tubes and the cold fluid tubes are arranged in a manner of overlapping in the middle and extending at both ends, the overlapping area of ​​the heat exchange tubes constitutes the heat exchange area of ​​the honeycomb heat exchange core, and the extended area of ​​the heat exchange tubes constitutes the guide area of ​​the honeycomb heat exchange core; the honeycomb heat exchange core is arranged inside the heat exchange section shell and the guide section shell, and the heat exchange of the honeycomb heat exchange core The zone is completely arranged inside the heat exchange section shell, the end face of the heat exchange tube in the heat exchange zone coincides with the end face opening of the heat exchange section shell, and the end face of the heat exchange tube in the guide zone coincides with the end face opening on the front side of the guide section shell; the hot fluid inlet joint and the hot fluid outlet joint are respectively connected to the front side end face openings of the two guide section shells, and the cold fluid inlet joint and the cold fluid outlet joint are respectively connected to the side end face openings of the two guide section shells. The heat exchange section shell is located between the two guide section shells, and all connections are welded to ensure that the leakage rate of the heat exchanger is zero.

[0009] In a preferred embodiment of the present invention, the polygonal heat exchange tubes are arranged in a matrix, and the shape of the matrix includes a square matrix and a circular matrix.

[0010] In a preferred embodiment of the present invention, the length ratio of the heat exchange area to the flow guide area of ​​the honeycomb heat exchange core is 3-12:1.

[0011] In a preferred embodiment of the present invention, the cold fluid tubes and the hot fluid tubes of the honeycomb heat exchange core are arranged in parallel, in rotation and in an annular manner.

[0012] In a preferred embodiment of the present invention, the heat exchange tubes of the honeycomb heat exchange core are regular triangle heat exchange tubes, regular quadrilateral heat exchange tubes or regular hexagonal heat exchange tubes.

[0013] Compared with the prior art, the compact honeycomb structure countercurrent heat exchanger of the utility model has a heat exchange core composed of polygonal heat exchange tubes arranged in a matrix on all sides. The cross-section of the heat exchange core presents a honeycomb structure and adopts a non-mixed heat exchange form. The cold and hot fluids flow in adjacent heat exchange tubes respectively, and a countercurrent heat exchange flow mode is adopted. The heat exchange core includes a guide section and a heat exchange section, which reduces the heat transfer end difference of the heat exchanger and improves the heat source utilization efficiency. At the same time, the heat exchange core has a honeycomb structure, which greatly increases the heat exchange surface density of the heat exchanger and improves the compactness of the heat exchanger. It is used for gas-gas, gas-liquid and liquid-liquid heat exchange, as well as occasions where the space size of the heat exchanger is limited. The full-welded sealing method is adopted to achieve zero leakage and achieve the purpose of the utility model.

[0014] The features of the present invention can be clearly understood by referring to the drawings and the following detailed description of the preferred embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of a compact honeycomb structure counterflow heat exchanger of the utility model;

[0016] Figure 2 It is a structural schematic diagram of the honeycomb heat exchange core of the utility model;

[0017] Figure 3 It is a structural schematic diagram of the heat exchange section shell of the utility model;

[0018] Figure 4 It is a structural schematic diagram of the guide section housing of the utility model;

[0019] Figure 5 It is a schematic diagram of the parallel arrangement of cold and hot fluids of the utility model;

[0020] Figure 6 It is a schematic diagram of the rotational arrangement of the cold and hot fluids of the utility model;

[0021] Figure 7 It is a schematic diagram of the annular arrangement of hot and cold fluids of the present invention.

[0022] Description of the accompanying drawings: 1-honeycomb heat exchange core, 2-heat exchange section shell, 3-guide section shell, 4-hot fluid inlet joint, 5-cold fluid inlet joint, 6-hot fluid outlet joint, 7-cold fluid outlet joint, 11-heat exchange area of ​​heat exchange core, 12-guide area of ​​heat exchange core, 13-end face of heat exchange tube in guide area, 14-end face of heat exchange tube in heat exchange area, 21-end face of heat exchange section shell, 31-front side end face of guide section shell, 32-side end face of guide section shell. DETAILED DESCRIPTION

[0023] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below with reference to specific illustrations.

[0024] Example

[0025] like Figures 1 to 7 As shown, the compact honeycomb structure counterflow heat exchanger of the utility model includes a honeycomb heat exchange core 1, a heat exchange section shell 2, a guide section shell 3, a hot fluid inlet joint 4, a cold fluid inlet joint 5, a hot fluid outlet joint 6 and a cold fluid outlet joint 7.

[0026] The honeycomb heat exchange core 1 is composed of regular hexagonal heat exchange tubes arranged in a matrix, the cold and hot fluids are countercurrently exchanged, the hot fluid tubes and the cold fluid tubes are arranged in a manner of overlapping in the middle and extending at both ends, the overlapping area of ​​the heat exchange tubes constitutes the heat exchange area 11 of the heat exchange core, and the extended area of ​​the heat exchange tubes constitutes the guide area 12 of the heat exchange core; the honeycomb heat exchange core 1 is arranged inside the heat exchange section shell 2 and the guide section shell 3, the heat exchange area 11 of the heat exchange core is completely arranged inside the heat exchange shell 2, and the end surface 14 of the heat exchange tube in the heat exchange area is connected to the heat exchange tube end surface 14 of ... The openings of the end faces 21 of the section shells overlap, and the end faces 13 of the heat exchange tubes in the guide area overlap with the openings of the front side end faces 31 of the guide section shells; the hot fluid inlet joint 4 and the hot fluid outlet joint 6 are respectively connected to the openings of the front side end faces 31 of the two guide section shells, and the cold fluid inlet joint 5 and the cold fluid outlet joint 7 are respectively connected to the openings of the side end faces 32 of the two guide section shells. The heat exchange section shell 2 is located between the two guide section shells 3, and all connections are welded to ensure that the leakage rate of the heat exchanger is zero.

[0027] Reference Figure 1 The high-temperature fluid flows in from the hot fluid inlet joint 4, and flows out from the hot fluid outlet joint 6 after passing through the honeycomb heat exchange core 1. The temperature of the hot fluid decreases. The low-temperature cold fluid flows in from the cold fluid inlet joint 5, and flows out from the cold fluid outlet joint 7 after passing through the honeycomb heat exchange core 1. The temperature of the cold fluid increases, and the hot fluid and the cold fluid flow in a countercurrent heat exchange manner. The heat exchange section shell 2 and the guide section shell 3 are installed outside the honeycomb heat exchange core 1 to fix the honeycomb heat exchange core 1. The guide section shell 3 and the hot fluid inlet joint 4, the hot fluid outlet joint 6, the cold fluid inlet joint 5 and the cold fluid outlet joint 7 are sealed by welding to achieve zero leakage of the heat exchange medium to the environment. They can also be connected by bolts to achieve detachable joints, which is helpful for transportation, installation and maintenance of the heat exchanger.

[0028] Reference Figure 5 The honeycomb heat exchange core 1 is arranged in a square matrix, the hot section shell 2 and the guide section shell 3 are square tube structures, and the cold and hot fluid heat exchange tubes are arranged in parallel.

[0029] Reference Figure 6 The honeycomb heat exchange core 1 is arranged in a circular matrix, the hot section shell 2 and the guide section shell 3 are circular tube structures, and the cold and hot fluid heat exchange tubes are arranged in a rotating manner.

[0030] Reference Figure 7 The honeycomb heat exchange core 1 is arranged in a circular matrix, the hot section shell 2 and the guide section shell 3 are circular tube structures, and the cold and hot fluid heat exchange tubes are arranged in a ring.

[0031] Table 1 shows the heat exchange performance comparison values ​​of the compact honeycomb counterflow heat exchanger of the utility model and the shell and tube heat exchanger under the same heat exchange medium inlet parameters and the same external dimension parameters. It can be seen from Table 1 that under the same inlet parameter conditions, the heat exchange performance of the compact honeycomb counterflow heat exchanger is better than that of the shell and tube heat exchanger.

[0032] Table 1 Comparison of heat transfer performance

[0033]

[0034] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected, and the scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A compact honeycomb structure counterflow heat exchanger, characterized in that: The invention comprises a honeycomb heat exchange core, a heat exchange section shell and a guide section shell; the honeycomb heat exchange core is composed of polygonal heat exchange tubes arranged in a matrix, the cold and hot fluids are in countercurrent heat exchange, the hot fluid tubes and the cold fluid tubes are arranged in a way of overlapping in the middle and extending at both ends, the overlapping area of ​​the heat exchange tubes constitutes the heat exchange area of ​​the honeycomb heat exchange core, and the extended area of ​​the heat exchange tubes constitutes the guide area of ​​the honeycomb heat exchange core; the honeycomb heat exchange core is arranged inside the heat exchange section shell and the guide section shell, and the heat exchange area of ​​the honeycomb heat exchange core is completely arranged inside the heat exchange section shell and the guide section shell. Inside the hot section shell, the end face of the heat exchange tube in the heat exchange zone coincides with the end face opening of the heat exchange section shell, and the end face of the heat exchange tube in the guide zone coincides with the end face opening on the front side of the guide section shell; the hot fluid inlet joint and the hot fluid outlet joint are respectively connected to the front side end face openings of the two guide section shells, and the cold fluid inlet joint and the cold fluid outlet joint are respectively connected to the side end face openings of the two guide section shells. The heat exchange section shell is located between the two guide section shells, and all connections are welded to ensure that the leakage rate of the heat exchanger is zero.

2. The compact honeycomb structure counterflow heat exchanger according to claim 1, characterized in that: The polygonal heat exchange tubes are arranged in a matrix, and the shape of the matrix includes a square matrix and a circular matrix.

3. The compact honeycomb structure counterflow heat exchanger according to claim 1, characterized in that: The length ratio of the heat exchange area to the flow guide area of ​​the honeycomb heat exchange core is 3-12:

1.

4. The compact honeycomb structure counterflow heat exchanger according to claim 1, characterized in that: The arrangement modes of the cold fluid tubes and the hot fluid tubes of the honeycomb heat exchange core include parallel arrangement, rotation arrangement and annular arrangement.

5. The compact honeycomb structure counterflow heat exchanger according to claim 1, characterized in that: The heat exchange tubes of the honeycomb heat exchange core are regular triangle heat exchange tubes, regular quadrilateral heat exchange tubes or regular hexagon heat exchange tubes.

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