Central air conditioning cooling tower drift water recovery and evaporation efficiency enhancement device

Abstract

This utility model relates to the technical field of central air conditioning cooling tower recovery structure, and provides a device for recovering drift water and enhancing evaporation efficiency in central air conditioning cooling towers, including a drift water collection shell with an annular drainage groove at the bottom edge of the shell. This utility model collects the humid and hot airflow containing drift water discharged from the central air conditioning cooling tower through the drift water collection shell. Four cyclone separators then tangentially guide the airflow through their oblique inlets. Under centrifugal force, the water is initially recovered through the annular drainage groove. Furthermore, the uniform evaporation of the recovered water is achieved through the rectification of the rectifier grid and the porous honeycomb structure of the biomimetic honeycomb packing layer used for evaporation. The contact heat conduction between the second heat exchange plate on the oblique evaporation shell and the first heat exchange plate on the condenser, along with the heat transfer path formed by the copper alloy heat dissipation fins arranged between them, allows the low-temperature evaporation to be directionally transferred to the condenser, ensuring efficient low-temperature transfer.

Description

Technical Field

[0001] This utility model relates to the technical field of central air conditioning cooling tower recovery structure, and in particular to a device for recovering drift water and enhancing evaporation efficiency of central air conditioning cooling towers. Background Technology

[0002] Central air conditioning cooling towers are the core heat dissipation equipment in central air conditioning refrigeration systems. They are large heat exchange devices that use the principle of heat exchange between water and air to cool the high-temperature circulating water discharged from the central air conditioning condenser to a set temperature and then return it to the condenser to participate in the refrigeration cycle. In order to meet the needs of water conservation and emission reduction, central air conditioning cooling towers are often equipped with related central air conditioning cooling tower drift recovery devices, which can collect and recover the water vapor and fine water droplets discharged from the cooling tower and reintroduce them into the circulation system. For example, patent CN220270125U discloses a novel cooling tower water vapor recovery device, including a collection shell fitted onto the upper end of the cooling tower. A condensation box, communicating with the collection shell, is installed on the top surface of the collection shell. Multiple baffles are installed at an angle inside the condensation box, forming a serpentine condensation channel. One end of each left-side baffle is recessed to form a collection groove. Each side of the condensation box has an installation port opposite the collection groove, and a cooling component is installed in each installation port. Multiple heat dissipation fins are vertically installed on the outer surface of the cooling component. This novel cooling tower water vapor recovery device condenses the water vapor in the discharged water vapor into water droplets, which automatically flow into the collection groove, avoiding water waste. Furthermore, the serpentine condensation channel increases the condensation length, ensuring effective water collection. While the aforementioned novel cooling tower water vapor recovery device can condense the water vapor in the discharged water vapor into water droplets during use, automatically flowing into the collection tank to avoid water waste, and the serpentine condensation channel increases the condensation length to ensure effective water collection, it relies solely on a single condensation path within the serpentine condensation box to handle airflow containing drift water. It does not pre-separate large-particle drift water, causing the airflow to carry a large amount of large-particle drift water directly into the condensation channel. This results in concentrated consumption of condensation resources on large-particle drift water, with insufficient condensation of medium-sized drift water, limiting overall recovery efficiency. Furthermore, it relies on active cooling components to provide low condensation temperatures, requiring continuous electrical energy consumption for operation. It does not utilize the physical properties of drift water itself to achieve self-sufficiency in low temperatures through evaporation and heat absorption. Therefore, a drift water recovery and evaporation efficiency enhancement device for central air conditioning cooling towers needs to be designed. Utility Model Content

[0003] The purpose of this invention is to provide a device for recovering drift water and enhancing evaporation efficiency in central air conditioning cooling towers, in order to solve the defects of existing drift water recovery devices for central air conditioning cooling towers, which suffer from high energy consumption and low recovery efficiency due to the lack of graded recovery and evaporation enhancement.

[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a device for recovering drift water and enhancing evaporation efficiency of a central air conditioning cooling tower, including a drift water collection shell; An annular drainage groove is provided at the bottom edge of the drift collection shell, and a pre-separation drift guide plate is fixed at the bottom inside the drift collection shell. Cyclone separators are evenly installed on the pre-separation drift guide plate. The top of the drift collection shell is connected to a diversion pipe, and the bottom of the diversion pipe is evenly connected to a condenser. The bottom of the condenser is provided with a condensate recovery pipe fitting. The outer wall of the condenser is fixed with a first heat exchange plate, and an evaporation heat absorption efficiency enhancement structure is installed on the first heat exchange plate. The evaporation heat absorption efficiency enhancement structure includes an inclined evaporation shell fixed to the outer wall of the condensate recovery pipe fitting, and inclined porous exhaust plates and a second heat exchange plate are respectively provided at both ends of the inclined evaporation shell. Copper alloy heat dissipation fins are uniformly arranged between the second heat exchange plate and the first heat exchange plate. The interior of the inclined evaporation shell is provided with a biomimetic honeycomb packing layer for evaporation that matches the inclined porous exhaust plates.

[0005] Furthermore, the cyclone separators are distributed at equal angles on the pre-separation drift inlet plate, and the cyclone separators are provided with oblique inlets that are connected to the pre-separation drift inlet plate.

[0006] Furthermore, the cyclone separator is provided with four units, and each cyclone separator is connected to a main exhaust pipe. The bottom end of the cyclone separator is provided with a droplet discharge trough that is connected to an annular drainage trough.

[0007] Furthermore, there are three condenser cylinders, and the condenser cylinders are evenly distributed in the evaporation heat absorption and efficiency enhancement structure.

[0008] Furthermore, the top of the inclined evaporation shell is provided with a rectifier grid that matches the biomimetic honeycomb packing layer for evaporation, and a liquid guide pipe is uniformly connected between the rectifier grid and the annular drainage groove.

[0009] Furthermore, an intermediate condenser tube is fixed at the middle position of the condenser cylinder, and the intermediate condenser tube is connected between the condensate recovery pipe and the diversion pipe.

[0010] Furthermore, a left-hand spiral winding shaft and a right-hand spiral winding shaft are sequentially wound on the intermediate condenser tube, and a cold air inlet is provided at the bottom end of both the left-hand spiral winding shaft and the right-hand spiral winding shaft. The cold air inlet penetrates radially and extends to the outside of the condenser tube.

[0011] Furthermore, a one-way valve is installed on the condensate recovery pipe fitting.

[0012] The advantages of the drift water recovery and evaporation efficiency enhancement device for central air conditioning cooling towers provided by this utility model are as follows: Evaporative heat absorption and efficiency enhancement structures are installed, and a water-laden, humid, hot airflow discharged from the central air conditioning cooling tower is collected through a water-laden collection shell. Four cyclone separators then tangentially guide the airflow through their angled inlets, causing the airflow to rotate at high speed inside the cyclone separators. Under centrifugal force, large-diameter water particles in the airflow are thrown against the inner wall of the cyclone separator, coalesce, and flow into an annular guide channel through the droplet discharge trough at the bottom of the cyclone separator for initial recovery. The airflow, now free of large water particles, enters the next processing stage through the main exhaust pipe connected to the top of the cyclone separator. Further processing will... The separated and recovered drift water is used as an evaporation medium. Through the rectification of the rectifier grid and the combination of the porous honeycomb structure of the biomimetic honeycomb packing layer for evaporation, the uniform evaporation of the recovered water can be achieved. Furthermore, through the contact heat conduction between the second heat exchange plate on the inclined evaporation shell and the first heat exchange plate on the condenser, as well as the heat transfer path formed by the copper alloy heat dissipation fins arranged between the two, the low temperature of the evaporation can be directionally transferred to the condenser, ensuring efficient low-temperature transfer. This reduces the gas temperature inside the condenser, which is beneficial to improving the condensation and recovery efficiency of the drift water, thus achieving a synergistic effect between drift water recovery and evaporation efficiency enhancement. By incorporating a left-handed spiral winding shaft, the pre-separated airflow is evenly distributed into three equally spaced condenser cylinders via a distribution pipe at the top of the water droplet collection shell. The air then enters the intermediate condenser tube in the middle of each cylinder. Simultaneously, the left-handed and right-handed spiral winding shafts on the intermediate condenser tube introduce indoor cold air through the cold air inlet, causing the airflow inside the intermediate condenser tube to condense upon contact with the cold air. The resulting condensate flows along the cylinder wall into the condensate recovery pipe at the bottom. Furthermore, the left-handed and right-handed spiral winding shafts form a continuous spiral channel on the intermediate condenser tube. The alternating left-handed and right-handed spirals create a symmetrical spiral flow path. During rotation, the airflow mutually restrains and counteracts off-center loading, avoiding the airflow deviation problems caused by traditional single spirals or straight channels. This ensures that after the cold air is introduced through the cold air inlet, it diffuses evenly within the spiral channel, eliminating localized dead zones and ensuring a uniform temperature across all areas of the intermediate condenser tube. This prevents some water droplets from failing to condense due to lack of contact with cold air, thus improving the stability of condensate recovery. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model; Figure 2 This is a three-dimensional structural diagram of the evaporative heat absorption and efficiency enhancement structure of this utility model. Figure 3 This is a three-dimensional structural diagram of the oblique evaporation shell of this utility model. Figure 4 This is a three-dimensional cross-sectional structural diagram of the water collection shell of this utility model. Figure 5This is a three-dimensional structural diagram of the condenser cylinder of this utility model. Figure 6 This is a schematic diagram of the three-dimensional structure of the left-handed spiral disk around the axis of this utility model; Figure 7 This is a three-dimensional structural diagram of the pre-separation drift guide plate of this utility model.

[0014] The following are the annotations in the figure: 1. Evaporation heat absorption and efficiency enhancement structure; 101. Slanted porous exhaust plate; 102. Bionic honeycomb packing layer for evaporation; 103. Rectifying grid; 104. Slanted evaporation shell; 105. Liquid guide pipe; 106. Second heat exchange plate; 107. Copper alloy heat dissipation fins; 2. Condensing cylinder; 3. Condensate recovery pipe fittings; 4. One-way valve; 5. Floodwater collection shell; 6. Annular drainage groove; 7. Diverter pipe; 8. Main exhaust pipe; 9. Pre-separated floodwater guide plate; 10. Slanted inlet; 11. Droplet discharge groove; 12. First heat exchange plate; 13. Left-hand spiral winding shaft; 14. Right-hand spiral winding shaft; 15. Intermediate condenser tube; 16. Cold air inlet; 17. Cyclone separator. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Please see Figures 1-7 The device for recovering drift water and enhancing evaporation efficiency of central air conditioning cooling tower provided by this utility model includes a drift water collection shell 5.

[0017] Reference Figures 1-7 An annular drainage groove 6 is provided at the bottom edge of the drift collection shell 5, and a pre-separation drift guide plate 9 is fixed at the bottom inside the drift collection shell 5. Cyclone separators 17 are evenly installed on the pre-separation drift guide plate 9. The top of the drift collection shell 5 is connected to a diversion pipe 7, and the bottom of the diversion pipe 7 is evenly connected to a condenser cylinder 2. The bottom of the condenser cylinder 2 is provided with a condensate recovery pipe fitting 3. The outer wall of the condenser cylinder 2 is fixed with a first heat exchange plate 12, and an evaporation heat absorption efficiency enhancement structure 1 is installed on the first heat exchange plate 12. The evaporation heat absorption efficiency enhancement structure 1 includes an inclined evaporation shell 104 fixed to the outer wall of the condensate recovery pipe fitting 3, and inclined porous exhaust plates 101 and second heat exchange plates 106 are respectively provided at both ends of the inclined evaporation shell 104. Copper alloy heat dissipation fins 107 are uniformly arranged between the second heat exchange plate 106 and the first heat exchange plate 12. An evaporation biomimetic honeycomb packing layer 102 matching the inclined porous exhaust plate 101 is provided inside the inclined evaporation shell 104. Cyclone separators 17 are distributed at equal angles on the pre-separation drift inlet plate 9, and the cyclone separators 17 are provided with oblique inlets 10 that are connected to the pre-separation drift inlet plate 9. Four cyclone separators 17 are provided, and an exhaust pipe 8 is connected to each cyclone separator 17. A droplet discharge trough 11 connected to an annular diversion trough 6 is provided at the bottom of the cyclone separator 17.

[0018] In use, the hot and humid airflow containing drift water discharged from the central air conditioning cooling tower first enters the drift water collection shell 5. The airflow is guided to the pre-separation drift water inlet plate 9 at the bottom of the shell. The four cyclone separators 17 on the pre-separation drift water inlet plate 9, which are distributed at equal angles, tangentially guide the airflow through their own oblique inlets 10, causing the airflow to rotate at high speed inside the cyclone separators 17. Under the action of centrifugal force, the large-diameter drift water in the airflow is thrown towards the inner wall of the cyclone separators 17. After coalescence, it flows into the annular guide channel 6 through the droplet discharge channel 11 at the bottom of the cyclone separators 17 to complete the initial recovery. The airflow with the large-particle drift water removed then enters the next processing stage through the exhaust pipe 8 connected to the top of the cyclone separators 17.

[0019] In use, the rectifier grid 103 allows the recycled water from the annular drainage channel 6, guided by gravity and via the liquid guide pipe 105, to be diverted and rectified within the inclined evaporation shell 104. Then, under gravity, the recycled water is evenly spread onto the surface of the biomimetic honeycomb packing layer 102 for evaporation. The porous honeycomb structure of the biomimetic honeycomb packing layer 102 increases the contact area between water and air, facilitating the evaporation of the recycled water. Based on the heat absorption of evaporation, the internal gas environment of the inclined evaporation shell 104 is cooled. The water then exchanges heat with the first heat exchanger on the condenser cylinder 2 via the second heat exchange plate 106 on the inclined evaporation shell 104. The contact heat conduction of plate 12, combined with the uniformly arranged copper alloy heat dissipation fins 107 between them, increases the heat exchange area. This allows the low temperature generated inside the inclined evaporation shell 104 due to evaporation heat absorption to be transferred to the left-hand spiral shaft 13 and right-hand spiral shaft 14 inside the condenser cylinder 2. This, in turn, cools the gas used for condensation on the left-hand spiral shaft 13 and right-hand spiral shaft 14. Evaporation enhances the cooling and condensation effect of the cold air. By reducing the indoor gas temperature, the efficient condensation treatment of the drift water introduced into the intermediate condenser tube 15 can be improved, thus achieving the effect of evaporation efficiency enhancement.

[0020] Reference Figures 1-6 There are 3 condenser cylinders 2, and the condenser cylinders 2 are evenly distributed on the evaporation heat absorption enhancement structure 1; The top of the inclined evaporation shell 104 is provided with a rectifier grid 103 that matches the biomimetic honeycomb packing layer 102 for evaporation, and a liquid guide pipe 105 is uniformly connected between the rectifier grid 103 and the annular drainage groove 6. A middle condenser tube 15 is fixed at the middle position of the condenser cylinder 2, and the middle condenser tube 15 is connected between the condensate recovery pipe fitting 3 and the diversion pipe 7. A left-hand spiral winding shaft 13 and a right-hand spiral winding shaft 14 are wound sequentially on the intermediate condenser tube 15. Both the left-hand spiral winding shaft 13 and the right-hand spiral winding shaft 14 are provided with cold air inlet 16 at their bottom ends. The cold air inlet 16 penetrates radially and extends to the outside of the condenser tube 2. A one-way valve 4 is installed on the condensate recovery pipe fitting 3.

[0021] In use, the pre-separated airflow is evenly distributed into three equally spaced condenser cylinders 2 through the diversion pipe 7 at the top of the water collection shell 5, and then enters the intermediate condenser pipe 15 in the middle of each condenser cylinder 2. At the same time, the left-hand spiral winding shaft 13 and the right-hand spiral winding shaft 14 coiled on the intermediate condenser pipe 15 introduce cold air into the room through the cold air inlet 16, causing the airflow inside the intermediate condenser pipe 15 to condense upon encountering the cold air. The resulting condensate flows along the cylinder wall into the condensate recovery pipe 3 at the bottom. The one-way valve 4 on the condensate recovery pipe 3 ensures that the condensate flows back to the cooling tower water collection pool in one direction, avoiding backflow.

[0022] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A device for recovering drift water and enhancing evaporation efficiency in a central air conditioning cooling tower, comprising a drift water collection shell (5), characterized in that: An annular drainage groove (6) is provided at the bottom edge of the drift collection shell (5), and a pre-separation drift guide plate (9) is fixed at the bottom inside the drift collection shell (5). Cyclone separators (17) are evenly installed on the pre-separation drift guide plate (9). The top of the drift collection shell (5) is connected to a diversion pipe (7), and the bottom of the diversion pipe (7) is uniformly connected to a condenser (2). The bottom of the condenser (2) is provided with a condensate recovery pipe fitting (3). The outer wall of the condenser (2) is fixed with a first heat exchange plate (12), and an evaporation heat absorption efficiency enhancement structure (1) is installed on the first heat exchange plate (12). The evaporation heat absorption enhancement structure (1) includes an inclined evaporation shell (104) fixed to the outer wall of the condensate recovery pipe fitting (3), and inclined porous exhaust plates (101) and second heat exchange plates (106) are respectively provided at both ends of the inclined evaporation shell (104). Copper alloy heat dissipation fins (107) are uniformly provided between the second heat exchange plate (106) and the first heat exchange plate (12). An evaporation biomimetic honeycomb packing layer (102) matching the inclined porous exhaust plate (101) is provided inside the inclined evaporation shell (104).

2. The device for recovering drift water and enhancing evaporation efficiency of a central air conditioning cooling tower according to claim 1, characterized in that: The cyclone separators (17) are distributed at equal angles on the pre-separation drift inlet plate (9), and the cyclone separators (17) are provided with oblique inlets (10) that are connected to the pre-separation drift inlet plate (9).

3. The device for recovering drift water and enhancing evaporation efficiency of a central air conditioning cooling tower according to claim 1, characterized in that: Four cyclone separators (17) are provided, and an exhaust pipe (8) is connected to the cyclone separator (17). A droplet discharge tank (11) connected to the annular diversion groove (6) is provided at the bottom of the cyclone separator (17).

4. The device for recovering drift water and enhancing evaporation efficiency of a central air conditioning cooling tower according to claim 1, characterized in that: There are 3 condenser cylinders (2), and the condenser cylinders (2) are evenly distributed on the evaporation heat absorption enhancement structure (1).

5. The device for recovering drift water and enhancing evaporation efficiency of a central air conditioning cooling tower according to claim 1, characterized in that: The top of the inclined evaporation shell (104) is provided with a rectifier grid (103) that matches the biomimetic honeycomb packing layer (102) for evaporation, and a liquid guide pipe (105) is uniformly connected between the rectifier grid (103) and the annular drainage groove (6).

6. The device for recovering drift water and enhancing evaporation efficiency of a central air conditioning cooling tower according to claim 1, characterized in that: A middle condenser tube (15) is fixed at the middle position of the condenser cylinder (2), and the middle condenser tube (15) is connected between the condensate recovery pipe (3) and the diversion pipe (7).

7. The device for recovering drift water and enhancing evaporation efficiency of a central air conditioning cooling tower according to claim 6, characterized in that: The intermediate condenser tube (15) is wound with a left-hand spiral winding shaft (13) and a right-hand spiral winding shaft (14) in sequence. Both the left-hand spiral winding shaft (13) and the right-hand spiral winding shaft (14) are provided with a cold air inlet (16) at their bottom ends. The cold air inlet (16) penetrates radially and extends to the outside of the condenser tube (2).

8. The device for recovering drift water and enhancing evaporation efficiency of a central air conditioning cooling tower according to claim 1, characterized in that: A one-way valve (4) is installed on the condensate recovery pipe fitting (3).

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