Counter-flow type heat exchange device

Abstract

The utility model provides a reverse flow type heat exchange device. The reverse flow type heat exchange device comprises a tower body, a heat exchange tube bundle and an injection mechanism, the heat exchange tube bundle is arranged in the tower body in the vertical direction, a circulating water inlet is formed in the lower end of the heat exchange tube bundle, and a circulating water outlet is formed in the upper end of the heat exchange tube bundle; the spraying mechanism comprises nozzles, a conveying pipeline and a high-pressure spraying pump, a plurality of nozzles used for spraying water to the outer surface of the heat exchange tube bundle are distributed outside the heat exchange tube bundle, and each nozzle is communicated with the high-pressure spraying pump through the conveying pipeline. The water-water heat exchanger has the advantages that a high-pressure jet thin water film can be formed between external circulating water and the heat exchange tube bundle, and internal circulating water and the external circulating water are in a reverse flow type, so that the water-water heat exchange efficiency can be greatly improved.

Description

[Technical Field]

[0001] This utility model relates to the field of cooling tower technology, and in particular to a counter-flow heat exchange device. [Background Technology]

[0002] Evaporative cooling towers are devices that utilize the principle of water evaporation and heat absorption for cooling, and are widely used in various fields such as industry, energy, and construction. Evaporative cooling towers consist of internal and external circulation. Internal circulation involves high-temperature circulating water entering the heat exchange tube bundle of the evaporative cooling tower and exchanging heat with spray water on the outside of the tube bundle, thus cooling the high-temperature circulating water to the required process temperature. External circulation involves using a water pump to draw water and spray it onto the outside of the heat exchange tube bundle, while a fan drives airflow within the tower, ensuring sufficient contact between the spray water, the heat exchange tube bundle, and the air to achieve heat and mass transfer, thereby removing heat from the high-temperature circulating water inside the heat exchange tube bundle and achieving a cooling effect. However, existing evaporative cooling towers typically employ a cross-flow pattern for their internal and external circulation, and the spray water uses a low-pressure splashing spray, resulting in a thin water film with poor performance and low heat exchange efficiency. In view of the above-mentioned problems, the inventors of this invention conducted in-depth research on this issue, leading to this invention. [Utility Model Content]

[0003] The technical problem to be solved by this utility model is to provide a counter-flow heat exchange device, which solves the problem that the internal and external circulation of the heat exchange device of the existing evaporative cooling tower usually adopts a cross-flow pattern, and the spray water adopts a low-pressure splash spray, resulting in a poor thin water film effect and poor heat exchange efficiency.

[0004] This utility model is implemented as follows:

[0005] A counter-current heat exchange device includes a tower body, a heat exchange tube bundle, and a spray mechanism; the heat exchange tube bundle is arranged vertically inside the tower body, and a circulating water inlet is provided at the lower end of the heat exchange tube bundle, and a circulating water outlet is provided at the upper end of the heat exchange tube bundle.

[0006] The spraying mechanism includes nozzles, delivery pipelines, and a high-pressure spray pump. Several nozzles for spraying water onto the outer surface of the heat exchange tube bundle are distributed outside the tubes. Each nozzle is connected to the high-pressure spray pump through a delivery pipeline.

[0007] Furthermore, the heat exchange tube bundle includes several heat exchange plate tubes arranged in a neat manner, and several nozzles are arranged from bottom to top between two adjacent heat exchange plate tubes, with the nozzles facing the outer surface of the heat exchange plate tubes.

[0008] Furthermore, the delivery pipeline includes branch pipes and main delivery pipes. Several branch pipes are arranged from bottom to top between two adjacent heat exchange plate tubes and on both sides of the front and rear of the heat exchange tube bundle. Several nozzles are installed on each branch pipe. Each branch pipe is connected to the high-pressure jet pump through the main delivery pipe.

[0009] Furthermore, the tower body is provided with a number of heat exchange tube bundles arranged from left to right, and the heat exchange plates on each heat exchange tube bundle are aligned with each other.

[0010] Furthermore, the nozzle is a wide-angle fan-shaped nozzle.

[0011] Furthermore, the input end of the high-pressure jet pump is equipped with a filter device.

[0012] Furthermore, one side of the tower body serves as the air inlet, and a blower is installed at the air inlet.

[0013] Furthermore, a dust removal device is installed inside the tower between the air inlet and the heat exchange tube bundle.

[0014] Furthermore, the dust removal device is a packing material with a honeycomb structure.

[0015] Furthermore, the other side of the tower body serves as the air outlet, and a water collector is installed at the air outlet.

[0016] By adopting the technical solution of this utility model, at least the following beneficial effects are achieved:

[0017] 1. By vertically arranging the heat exchange tube bundle within the tower body, with a circulating water inlet at the lower end and a circulating water outlet at the upper end, the internal and external circulating water flow in a counter-current manner, significantly improving water-to-water heat exchange efficiency. Simultaneously, a high-pressure jet pump draws external circulating water, which is then sprayed onto the outer surface of the heat exchange tube bundle using nozzles. This creates a high-pressure jet-thin water film between the external circulating water and the heat exchange tube bundle. This film is more uniform, eliminates dead zones, and is thinner than traditional low-pressure splashing systems. Furthermore, the faster jet velocity and impact-splash effect enhance heat exchange between air and external circulating water within the tube bundle gaps, greatly strengthening the water-to-water heat exchange effect. Additionally, when fouling adheres to the outer surface of the heat exchange tube bundle, the jetting external circulating water can wash it away, reducing the reduction in heat exchange performance caused by scaling.

[0018] 2. By equipping the input end of the high-pressure jet pump with a filter device, it can prevent the nozzle from becoming clogged due to foreign objects being drawn into the high-pressure jet pump. On the other hand, it can improve the water quality of the external circulating water sprayed onto the heat exchange tube bundle, thereby reducing the occurrence of scaling on the surface of the heat exchange tube bundle.

[0019] 3. By installing a dust removal device between the air inlet and the heat exchange tube bundle, the external natural air can be filtered and dust removed before entering the outside of the heat exchange tube bundle to participate in heat exchange. This can effectively reduce the dust in the external natural air entering the outside of the heat exchange tube bundle, making the outer surface of the heat exchange tube bundle less prone to structural damage and affecting heat exchange performance.

[0020] 4. By installing a water collector at the air outlet, on the one hand, the external circulating water sprayed from the nozzles can be prevented from being blown by the wind to the outside of the tower, thus avoiding water waste; on the other hand, the water collector can be used to isolate the external environment, preventing dust and other impurities from the external environment from drifting into the tower and causing adverse effects on the heat exchange tube bundle. [Attached Image Description]

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Figure 1 This is a front view of a counter-current heat exchange device according to this utility model;

[0023] Figure 2 This is a top view of a counter-current heat exchange device according to this utility model;

[0024] Figure 3 yes Figure 2 A magnified view of part A in the middle.

[0025] Explanation of reference numerals in the attached figures:

[0026] Counterflow heat exchanger 100;

[0027] Tower body 1, air inlet 11, air outlet 12;

[0028] Heat exchanger tube bundle 2, circulating water inlet 21, circulating water outlet 22, heat exchanger plate tube 23;

[0029] Spraying mechanism 3, nozzle 31, delivery pipeline 32, branch pipeline 321, main delivery pipeline 322, high-pressure spray pump 33, filter device 34;

[0030] Blower 4;

[0031] Dust removal device 5, packing material 51, spray structure 52;

[0032] Water collector 6.

Detailed Implementation Methods

[0033] To better understand the technical solution of this utility model, the technical solution of this utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] It should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing these embodiments and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature.

[0035] Please see Figures 1 to 3 As shown, this utility model discloses a counter-current heat exchange device 100, which includes a tower body 1, a heat exchange tube bundle 2, and a spray mechanism 3. The heat exchange tube bundle 2 is arranged vertically inside the tower body 1, and a circulating water inlet 21 is provided at the lower end of the heat exchange tube bundle 2, and a circulating water outlet 22 is provided at the upper end of the heat exchange tube bundle 2. During operation, the internal circulating water (i.e., the high-temperature circulating water to be cooled) enters the heat exchange tube bundle 2 from the circulating water inlet 21 for heat exchange, and the internal circulating water after heat exchange (i.e., the cooled process water) is output to the required equipment through the circulating water outlet 22.

[0036] The spraying mechanism 3 includes a nozzle 31, a delivery pipeline 32, and a high-pressure spray pump 33. Several nozzles 31 are distributed outside the heat exchange tube bundle 2 for spraying water onto the outer surface of the heat exchange tube bundle 2. Each nozzle 31 is connected to the high-pressure spray pump 33 through the delivery pipeline 32, so that the high-pressure spray pump 33 can deliver the extracted external circulating water to each nozzle 31 through the delivery pipeline 32, and the nozzles 31 spray the external circulating water onto the outer surface of the heat exchange tube bundle 2.

[0037] This invention arranges the heat exchange tube bundle 2 vertically within the tower body 1, with a circulating water inlet 21 at the lower end and a circulating water outlet 22 at the upper end, making the internal and external circulating water flow in a counter-current manner, which greatly improves the water-to-water heat exchange efficiency. Simultaneously, a high-pressure jet pump 33 draws external circulating water and sprays it onto the outer surface of the heat exchange tube bundle 2 using nozzles 31. This creates a high-pressure jet-thin water film between the external circulating water and the heat exchange tube bundle 2. This film is more uniform, has no dead angles, and is thinner than the traditional low-pressure splashing type. The jetting velocity is also faster, with an impact splashing effect, which enhances the heat exchange between air and external circulating water in the gaps of the heat exchange tube bundle 2, thus greatly strengthening the water-to-water heat exchange effect. Furthermore, when the outer surface of the heat exchange tube bundle 2 is covered with dirt, the jetting external circulating water can wash it away, reducing the reduction in heat exchange performance caused by scaling on the outer surface of the heat exchange tube bundle 2.

[0038] In some embodiments of this utility model, the heat exchange tube bundle 2 includes a number of heat exchange plate tubes 23 arranged in a neat manner. Between two adjacent heat exchange plate tubes 23, a number of nozzles 31 are arranged from bottom to top, and the spray nozzles 31 face the outer surface of the heat exchange plate tubes 23, so that when working, the nozzles 31 can spray external circulating water onto the outer surface of the heat exchange plate tubes 23 and form a splashing effect.

[0039] In some embodiments of this utility model, the conveying pipeline 32 includes a branch pipe 321 and a main conveying pipe 322. Several branch pipes 321 are arranged from bottom to top between adjacent heat exchanger tubes 23 and on both sides of the heat exchanger tube bundle 2. Each branch pipe 321 is equipped with several nozzles 31. Each branch pipe 321 is connected to the high-pressure jet pump 33 through the main conveying pipe 322. In a specific implementation of this utility model, nozzles 31 are provided on both sides of the branch pipe 321 between adjacent heat exchanger tubes 23. However, for the front and rear sides of the heat exchanger tube bundle 2, only the side of the branch pipe 321 closest to the heat exchanger tube bundle 2 needs to be equipped with nozzles 31. In specific operation, the counter-current heat exchanger 100 of this utility model draws external circulating water through the high-pressure jet pump 33 and distributes the external circulating water to each branch pipe 321 through the main conveying pipe 322. Finally, the external circulating water is sprayed onto the outer surface of the heat exchange plate tube 23 by the nozzle 31.

[0040] In some embodiments of this utility model, in order to achieve better heat exchange effect, a plurality of heat exchange tube bundles 2 are arranged from left to right inside the tower body 1, and the heat exchange plate tubes 23 on each heat exchange tube bundle 2 are aligned with each other. By aligning the heat exchange plate tubes 23 on each heat exchange tube bundle 2 with each other, it is possible to better arrange the diversion pipe 321 and the nozzle 31 between two adjacent heat exchange plate tubes 23.

[0041] As a specific embodiment of this utility model, the nozzle 31 adopts a wide-angle fan-shaped nozzle, which makes the thin water film formed after the nozzle 31 sprays more uniform and covers a larger area, thereby improving the heat exchange effect.

[0042] In some embodiments of this utility model, a filter device 34 is provided at the input end of the high-pressure jet pump 33. By providing a filter device 34 at the input end of the high-pressure jet pump 33, on the one hand, it can prevent the nozzle 31 from becoming clogged due to foreign objects being drawn into the high-pressure jet pump 33, and on the other hand, it can improve the water quality of the external circulating water sprayed onto the heat exchange tube bundle 2, thereby reducing the occurrence of scaling on the surface of the heat exchange tube bundle 2.

[0043] In this utility model, one side of the tower body 1 serves as the air inlet 11, and the air inlet 11 is equipped with a blower 4 to blow external natural air into the tower body 1 and make the external natural air flow through the heat exchange tube bundle 2 in a cross-flow manner, thereby ensuring that both the external natural air and the external circulating water can participate in heat exchange on the outside of the heat exchange tube bundle 2, thus improving the heat exchange effect.

[0044] In some embodiments of this utility model, a dust removal device 5 is provided inside the tower body 1 between the air inlet 11 and the heat exchange tube bundle 2. Since external natural wind carries dust and other impurities, by providing a dust removal device 5 between the air inlet 11 and the heat exchange tube bundle 2, the external natural wind can be filtered and dust removed before entering the outside of the heat exchange tube bundle 2 to participate in heat exchange. This can effectively reduce the dust in the external natural wind entering the outside of the heat exchange tube bundle 2, making the outer surface of the heat exchange tube bundle 2 less prone to structural damage and affecting heat exchange performance.

[0045] In one specific embodiment of this utility model, the dust removal device 5 is a packing material 51 with a honeycomb structure. When external natural wind passes through the packing material 51, most of the dust and impurities in the external natural wind are intercepted by the packing material 51. In addition, to further improve the dust removal effect, a spray structure 52 can be used to spray water from the top of the packing material 51 downwards.

[0046] In some embodiments of this utility model, the other side of the tower body 1 serves as the air outlet 12, and the air outlet 12 is equipped with a water collector 6.

[0047] This utility model, by setting a water collector 6 at the air outlet 12, can prevent the external circulating water sprayed by the nozzle 31 from being blown by the wind to the outside of the tower body 1, thereby avoiding water waste; on the other hand, the water collector 6 can be used to isolate the external environment, preventing dust and other impurities in the external environment from drifting into the tower body 1 and causing adverse effects on the heat exchange tube bundle 2.

[0048] While specific embodiments of the present invention have been described above, those skilled in the art should understand that the specific embodiments described are merely illustrative and not intended to limit the scope of the present invention. Equivalent modifications and variations made by those skilled in the art in accordance with the spirit of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A counter-current heat exchanger, characterized in that: It includes a tower body, a heat exchange tube bundle, and a spraying mechanism; the heat exchange tube bundle is arranged vertically inside the tower body, and a circulating water inlet is provided at the lower end of the heat exchange tube bundle, and a circulating water outlet is provided at the upper end of the heat exchange tube bundle. The spraying mechanism includes nozzles, delivery pipelines, and a high-pressure spray pump. Several nozzles for spraying water onto the outer surface of the heat exchange tube bundle are distributed outside the tubes. Each nozzle is connected to the high-pressure spray pump through a delivery pipeline.

2. The counter-current heat exchanger as described in claim 1, characterized in that: The heat exchange tube bundle includes several heat exchange plate tubes arranged in a neat manner. Between each pair of adjacent heat exchange plate tubes, several nozzles are arranged from bottom to top, and the nozzles face the outer surface of the heat exchange plate tubes.

3. The counter-current heat exchanger as described in claim 2, characterized in that: The delivery pipeline includes branch pipes and main delivery pipes. Several branch pipes are arranged from bottom to top between two adjacent heat exchange plate tubes and on both sides of the front and rear of the heat exchange tube bundle. Several nozzles are installed on each branch pipe. Each branch pipe is connected to the high-pressure jet pump through the main delivery pipe.

4. The counter-current heat exchanger as described in claim 2, characterized in that: The tower body contains several heat exchange tube bundles arranged from left to right, and the heat exchange plates on each heat exchange tube bundle are aligned with each other.

5. The counter-current heat exchanger as described in claim 1, characterized in that: The nozzle is a wide-angle fan-shaped nozzle.

6. The counter-current heat exchanger as described in claim 1, characterized in that: The input end of the high-pressure jet pump is equipped with a filter device.

7. A counter-current heat exchanger as described in any one of claims 1-6, characterized in that: One side of the tower body serves as the air inlet, and a blower is installed at the air inlet.

8. A counter-current heat exchanger as described in claim 7, characterized in that: A dust removal device is installed inside the tower between the air inlet and the heat exchange tube bundle.

9. A counter-current heat exchanger as described in claim 8, characterized in that: The dust removal device is a packing material with a honeycomb structure.

10. A counter-current heat exchanger as described in any one of claims 1-6, characterized in that: The other side of the tower serves as the air outlet, and a water collector is installed at the air outlet.

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