Crossflow tower mist eliminator heat exchange module

Abstract

This invention relates to the field of heat exchange module technology, specifically a crossflow tower defogging heat exchange module. It includes a heat exchanger body comprising, from top to bottom, a water inlet, a flow distribution area, and a heat exchange zone. The flow distribution area has alternating water channels and air channels arranged laterally. The water channels in the hot channel zone have top openings, while those in the cold channel zone have top sealing. Similarly, the air channels in the hot channel zone have top sealing, while those in the cold channel zone have top openings. This invention addresses the problems of traditional defogging modules, which often employ simple parallel channels or single-sided heat exchange structures, resulting in insufficient mixing of humid and dry air; the lack of a uniform water distribution structure in the packing material, leading to water flow deviation and stream-like flow, preventing the formation of a uniform water film on the heat exchange surface; and the inability of defogging modules to switch to full heat exchange and cooling mode at high temperatures, only achieving defogging under low-temperature conditions.

Description

Technical Field

[0001] This invention relates to the field of heat exchange module technology, specifically to a crossflow tower defogging heat exchange module. Background Technology

[0002] Crossflow cooling towers are widely used heat dissipation devices in industrial circulating water cooling systems, primarily achieving cooling through direct heat exchange between hot water and air. In winter or under low-temperature, high-humidity conditions, the hot, humid saturated gas discharged from the cooling tower mixes with the cold outside air, easily forming a visible white mist. This not only causes significant water evaporation and loss but also leads to icing of roads around the tower, equipment corrosion, and reduced visibility, impacting the surrounding environment and production safety.

[0003] To achieve defogging and water conservation, existing technologies typically add indirect heat exchange modules inside the cooling tower, utilizing dry, cold air and humid, hot air for heat and mass exchange, reducing the relative humidity of the air exiting the tower, thereby achieving the defogging effect.

[0004] As existing technologies are used, their shortcomings have gradually become apparent, mainly in the following aspects: First, traditional heat exchangers mostly use simple parallel channels or single-sided heat exchange structures, which result in insufficient mixing of humid and hot air with dry and cold air. As a result, there are still obvious mist plumes at the outlet of the tower, which are not completely defogging and have a low water-saving rate, and cannot meet the defogging requirements under low temperature and high humidity conditions.

[0005] Second, the existing packing lacks a uniform water distribution structure, and the water flow is prone to deviation and stream flow, which makes it impossible to form a uniform water film on the heat exchange surface. This significantly reduces the effective heat exchange area and makes it difficult to fully utilize the performance of the heat exchange module.

[0006] Third, conventional defogging modules can only achieve defogging under low-temperature conditions. They cannot switch to full heat exchange cooling mode under high-temperature conditions, resulting in insufficient cooling capacity. They cannot adapt to seasonal and load changes, thus limiting their applicability.

[0007] Fourth, existing heat exchangers are mostly segmented and spliced, with complex connections between the water inlet, the flow distribution area, the heat exchange area, and the water discharge area. This makes sealing difficult, prone to water and air leakage, has low structural strength, is easily deformed and leaks, and results in high maintenance costs and short service life.

[0008] In conclusion, the existing technology obviously has inconveniences and defects in practical use, so it is necessary to improve it. Summary of the Invention

[0009] To address the shortcomings of existing technologies, this invention provides a crossflow tower defogging heat exchange module. This module solves the problems of traditional defogging modules, which often employ simple parallel channels or single-sided heat exchange structures, resulting in insufficient mixing of humid and cold air with dry air; lack of uniform water distribution structure in the packing material, leading to water flow deviation and stream flow, making it impossible to form a uniform water film on the heat exchange surface; and the inability of the defogging module to achieve defogging only under low-temperature conditions and switch to full heat exchange and cooling mode under high-temperature conditions.

[0010] To address the above problems, the present invention provides the following technical solution: The crossflow tower defogging heat exchange module includes a heat exchanger body, which consists of a water spray port, a flow distribution area, and a heat exchange area from top to bottom. The flow distribution area is provided with alternating water channels and air channels in the transverse direction. The area above the water outlet is provided with hot channel area and cold channel area in parallel in the longitudinal direction. The water channel is provided with an opening at the top in the hot channel area and a closed opening at the top in the cold channel area. The air channel is provided with a closed opening at the top in the hot channel area and an opening at the top in the cold channel area. The heat exchange zone has crossflow air inlets and crossflow air outlets on its two horizontal side walls, which connect the water channel and the air channel.

[0011] As an optimized solution, the top of the hot aisle zone and the cold aisle zone are independently equipped with a water channel distribution system and an air channel water distribution system.

[0012] As an optimized solution, in defogging mode, the water distribution system of the water channel is turned on and the water distribution system of the air channel is turned off; in cooling mode, both the water distribution system of the water channel and the water distribution system of the air channel are turned on.

[0013] As an optimized solution, a drain outlet connecting the water channel and the air channel is provided at the bottom of the heat exchange zone.

[0014] As an optimized solution, the airflow distribution area is set with a sealing opening on the opposite sidewall in the air inlet direction.

[0015] As an optimized solution, the flow distribution area is provided with a water channel diffusion flow structure that uniformly guides the water in the hot aisle area to the entire flow distribution area, and an air channel diffusion flow structure that uniformly guides the water in the cold aisle area to the entire flow distribution area.

[0016] As an optimized solution, both the water channel diffusion-type flow guiding structure and the air channel diffusion-type flow guiding structure include several flow guiding protrusions arranged downward in a diffusion pattern. The lower ends of the several flow guiding protrusions correspond to the bottom of the entire flow guiding distribution area, and the upper ends of the several flow guiding protrusions correspond to the hot channel area or the cold channel area.

[0017] As an optimized solution, the heat exchange zone is equipped with a non-contact corrugated heat exchange structure to reduce airflow resistance.

[0018] As an optimized solution, the crossflow air inlet and crossflow air outlet are provided with a folding structure for adjusting the air volume.

[0019] As an optimized solution, the heat exchanger body is horizontally distributed on both sides of the central air duct of the crossflow tower, and the heat channel area is close to the outer wall of the crossflow tower.

[0020] Compared with the prior art, the beneficial effects of the present invention are: This invention employs an alternating arrangement of water channels and air channels, allowing humid and hot saturated gas and dry and hot unsaturated gas to mix thoroughly at the outlet, significantly reducing the relative humidity of the air exiting the tower, eliminating white fog at its source, significantly improving water-saving performance, and stably meeting the fog-eliminating requirements under low-temperature and high-humidity conditions. The water inlet and the flow distribution area are equipped with water channel diffusion flow structure and air channel diffusion flow structure corresponding to the hot aisle area / cold aisle area. This disperses and distributes the water flow evenly, effectively preventing water flow deviation and stream flow, so that the heat exchange surface forms a complete water film, greatly increasing the effective heat exchange area and giving full play to the performance of the heat exchange module. By independently setting up water channels and air channels, and equipping them with independent water distribution systems for both water channels and air channels, the module achieves automatic switching between defogging mode and cooling mode: under low temperature conditions, only the water channels are filled with water to achieve efficient defogging; in cooling mode, both the cold aisle area and the hot aisle area are filled with water, transforming into a full heat exchange cooling mode, which significantly improves cooling capacity, can adapt to seasonal operating conditions and load changes, and can adaptively switch between dual operating modes, making it applicable to a wider range of scenarios; The upper part of the water spray area is equipped with a partition section and a folded structure, and the hot aisle area and cold aisle area are strictly independent. The water spray outlet and the evenly distributed airflow area are sealed along the air intake direction to prevent water, air, and short circuits. The whole module is molded as a whole, with high structural strength, not easy to deform and leak, longer service life and lower maintenance cost. The heat exchange zone adopts a low-resistance non-contact corrugated structure, combined with the folded structure of the cross-flow air inlet and cross-flow air outlet, which ensures smooth airflow and fewer eddies. This improves the heat exchange effect while reducing wind resistance, reducing the energy consumption of the cooling tower fan, and improving the overall operating economy. The heat exchanger body can be horizontally arranged on both sides of the central air duct of the crossflow tower, which is compatible with the existing crossflow tower structure. It does not require major modification of the tower body, is easy to install, and has strong versatility. It can be widely used in various industrial crossflow cooling tower anti-fogging and water-saving renovation and new construction projects. Attached Figure Description

[0021] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0022] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the structure of the flow-guiding protrusion of the present invention; Figure 3 This is a top view of the structure of the water inlet of the present invention; Figure 4 This is a schematic diagram of the drain outlet structure of the present invention.

[0023] In the diagram: 1-Water inlet; 2-Flow distribution area; 3-Heat exchange area; 4-Baffle section; 5-Water channel distribution system; 6-Air channel water distribution system; 7-Hot aisle area; 8-Cold aisle area; 9-Crossflow tower central air duct; 10-Crossflow air inlet; 11-Crossflow air outlet; 12-Water outlet; 13-Water channel; 14-Air channel; 15-Flow guide protrusion. Detailed Implementation

[0024] The embodiments of the technical solution of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the technical solution of the present invention and are therefore intended to limit the scope of protection of the present invention.

[0025] like Figures 1 to 4 As shown, the crossflow tower defogging heat exchange module includes a heat exchanger body, which consists of a water spray port 1, a flow distribution area 2, and a heat exchange area 3 from top to bottom. The flow distribution area 2 is provided with alternating water channels 13 and air channels 14 in the transverse direction. The area above the water outlet 1 is provided with hot channel area 7 and cold channel area 8 in the longitudinal direction. The water channel 13 is provided with an open top in the hot channel area 7 and a closed top in the cold channel area 8. The air channel 14 is provided with a closed top in the hot channel area 7 and an open top in the cold channel area 8. The heat exchange zone 3 has cross-flow air inlets 10 and cross-flow air outlets 11 on its two horizontal side walls, which connect the water channel 13 and the air channel 14.

[0026] In practical applications, the layout can be configured as hot aisle zone 7 and cold aisle zone 8 according to the on-site working conditions, such as cold-hot, hot-cold-hot, cold-hot-cold, and various combinations of working conditions.

[0027] The top of the hot aisle zone 7 and the cold aisle zone 8 are independently equipped with a water channel distribution system 5 and an air channel water distribution system 6.

[0028] In defogging mode, water channel water distribution system 5 is turned on and air channel water distribution system 6 is turned off; in cooling mode, both water channel water distribution system 5 and air channel water distribution system 6 are turned on.

[0029] The bottom of the heat exchange zone 3 is provided with a drain outlet 12 that connects the water channel 13 and the air channel 14.

[0030] The airflow distribution zone 2 is located on the opposite side wall of the air inlet direction and is sealed.

[0031] The flow distribution area 2 is equipped with a water channel diffusion flow structure that evenly guides the water in the hot aisle area 7 to the entire flow distribution area 2, and an air channel diffusion flow structure that evenly guides the water in the cold aisle area 8 to the entire flow distribution area 2.

[0032] Both the water channel diffusion-type flow guiding structure and the air channel diffusion-type flow guiding structure include several flow guiding protrusions 15 arranged downward in a diffusion pattern. The lower ends of the several flow guiding protrusions 15 correspond to the bottom of the entire flow guiding uniform distribution area 2, and the upper ends of the several flow guiding protrusions 15 correspond to the hot channel area 7 or the cold channel area 8.

[0033] A partition section 4 is vertically fixed on the boundary line between the hot aisle zone 7 and the cold aisle zone 8.

[0034] Heat exchange zone 3 is equipped with a non-contact corrugated heat exchange structure to reduce airflow resistance.

[0035] Non-contact corrugated heat exchange structures include one of the following: wave-shaped, horizontal, vertical, folded, S-shaped, and oblique folded corrugated.

[0036] The crossflow air inlet 10 and crossflow air outlet 11 are equipped with a folding structure for adjusting the airflow. The folding structure can also be adjusted by setting different angles and lengths.

[0037] The shape of the folded structure can be one of the following: arc-shaped, obliquely folded, curved, or square.

[0038] The main body of the heat exchanger is horizontally distributed on both sides of the central air duct 9 of the crossflow tower, and the hot channel zone 7 is close to the outer wall of the crossflow tower.

[0039] The water inlet 1, the flow distribution area 2, and the heat exchange area 3 are designed as a single integrated unit.

[0040] The heat exchanger body is composed of several single-piece molded plates, which are connected in a forward or reverse direction by high-frequency welding or bonding.

[0041] The working principle of this device is as follows: In defogging mode, the water distribution system 5 of the water channel is open and the water distribution system 6 of the air channel is closed. The air in the water channel 13 cools the cooling water in the water channel 13 through contact heat exchange. Saturated gas flows out of the water channel 13 from the cross-flow air outlet 11. The air in the air channel 14 flows directly through the water channel 13 to perform indirect heat exchange on the cooling water in the water channel 13. Unsaturated gas flows out from the cross-flow air outlet 11. The saturated gas and unsaturated gas combine, reducing the water content in the gas and eliminating fog. In cooling mode, both the air duct water distribution system 6 and the water duct water distribution system 5 are fully opened, and water flows from top to bottom between the water duct 13 and the air duct 14. This, combined with the cold air entering laterally from the crossflow air inlet 10, allows for heat exchange in the heat exchange zone 3, and the hot and humid air is discharged from the crossflow air outlet 11, thus achieving a cooling effect.

[0042] The water channel 13 and the air channel 14 are arranged alternately, and the humid and hot saturated gas and the dry and hot unsaturated gas are fully mixed at the outlet, which significantly reduces the relative humidity of the air exiting the tower, eliminates white fog from the source, and significantly improves the water-saving effect. It can stably meet the fog elimination requirements under low temperature and high humidity conditions. The water outlet 1 and the flow distribution area 2 are equipped with corresponding hot channel area 7 and cold channel area 8 water channel diffusion flow structure and air channel diffusion flow structure, which evenly disperse and distribute the water flow, effectively avoid water flow deviation and stream flow, so that the heat exchange surface forms a complete water film, greatly improve the effective heat exchange area, and give full play to the performance of the heat exchange module. By independently setting up water channel 13 and air channel 14, and equipping them with independent water channel water distribution system 5 and air channel water distribution system 6, the module achieves automatic switching between defogging mode and cooling mode: under low temperature conditions, only water channel 13 is filled with water to achieve efficient defogging; under cooling mode, both cold aisle area 8 and hot aisle area 7 are filled with water, converting to full heat exchange cooling mode, which significantly improves cooling capacity, can adapt to seasonal conditions and load changes, and can adaptively switch between dual operating conditions, making it applicable to a wider range of scenarios; The water inlet 1 adopts a partition section 4 and a folded structure. The hot aisle zone 7 and the cold aisle zone 8 are strictly independent. The water inlet 1 and the airflow distribution zone 2 are sealed along the air inlet direction to prevent water leakage, air leakage and short circuit. The whole module is molded as a whole, with high structural strength, not easy to deform and leak, longer service life and lower maintenance cost. The heat exchange zone 3 adopts a low-resistance non-contact corrugated structure, combined with the folded structure of the cross-flow air inlet 10 and the cross-flow air outlet 11, which ensures smooth airflow and fewer eddies. This improves the heat exchange effect while reducing wind resistance, reducing the energy consumption of the cooling tower fan, and improving the overall operating economy. The heat exchanger body can be horizontally arranged on both sides of the central air duct 9 of the crossflow tower, which is highly compatible with the existing crossflow tower structure. It does not require major modification of the tower body, is easy to install, and has strong versatility. It can be widely used in various industrial crossflow cooling tower anti-fogging and water-saving renovation and new construction projects.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention 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 or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

Claims

1. A crossflow tower defogging heat exchange module, characterized in that: It includes a heat exchanger body, which consists of a water outlet (1), a flow distribution area (2), and a heat exchange area (3) from top to bottom. The flow distribution area (2) is provided with alternating water channels (13) and air channels (14) in the transverse direction. The area above the water outlet (1) is provided with a hot channel area (7) and a cold channel area (8) in the longitudinal direction. The water channel (13) is provided with an open top in the hot channel area (7) and a closed top in the cold channel area (8). The air channel (14) is provided with a closed top in the hot channel area (7) and an open top in the cold channel area (8). The heat exchange zone (3) has cross-flow air inlets (10) and cross-flow air outlets (11) on its two horizontal side walls, which connect the water channel (13) and the air channel (14).

2. The crossflow tower defogging heat exchange module according to claim 1, characterized in that: The top of the hot aisle zone (7) and the cold aisle zone (8) are independently equipped with a water channel distribution system (5) and an air channel water distribution system (6).

3. The crossflow tower defogging heat exchange module according to claim 2, characterized in that: In defogging mode, the water channel water distribution system (5) is turned on and the air channel water distribution system (6) is turned off; in cooling mode, both the water channel water distribution system (5) and the air channel water distribution system (6) are turned on.

4. The crossflow tower defogging heat exchange module according to claim 1, characterized in that: The bottom of the heat exchange zone (3) is provided with a drain outlet (12) that connects the water channel (13) and the air channel (14).

5. The crossflow tower defogging heat exchange module according to claim 1, characterized in that: The flow distribution area (2) is sealed on the opposite side wall in the air inlet direction.

6. The crossflow tower defogging heat exchange module according to claim 1, characterized in that: The flow distribution area (2) is provided with a water channel diffusion flow structure that uniformly guides the water in the hot channel area (7) to the entire flow distribution area (2), and an air channel diffusion flow structure that uniformly guides the water in the cold channel area (8) to the entire flow distribution area (2).

7. The crossflow tower defogging heat exchange module according to claim 6, characterized in that: Both the water channel diffusion-type flow guiding structure and the air channel diffusion-type flow guiding structure include several flow guiding protrusions (15) arranged downward in a diffusion pattern. The lower ends of the several flow guiding protrusions (15) correspond to the bottom of the entire flow guiding distribution area (2), and the upper ends of the several flow guiding protrusions (15) correspond to the hot channel area (7) or the cold channel area (8).

8. The crossflow tower defogging heat exchange module according to claim 1, characterized in that: The heat exchange zone (3) is provided with a non-contact corrugated heat exchange structure to reduce airflow resistance.

9. The crossflow tower defogging heat exchange module according to claim 1, characterized in that: The crossflow air inlet (10) and crossflow air outlet (11) are provided with a folding structure for adjusting the air volume.

10. The crossflow tower defogging heat exchange module according to claim 1, characterized in that: The heat exchanger body is horizontally distributed on both sides of the central air duct (9) of the crossflow tower, and the heat channel area (7) is close to the outer wall of the crossflow tower.

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