A closed cooling tower

Abstract

The present invention relates to the technical field of cooling towers, and specifically discloses a closed cooling tower, including: a shell, a spray device, and a water collection assembly. The bottom of the shell is provided with a water collection tank, and the shell is also provided with a plurality of heat exchange tubes. The plurality of heat exchange tubes are connected end to end to form a heat exchange coil. The spray device is located above the heat exchange tube, and the water collection assembly includes a water collection shell, a fixing rod, an extrusion rod, and a driving mechanism. The water collection shell is located between two adjacent heat exchange tubes, and its height is lower than the corresponding heat exchange tube, and is connected to the shell through a fixing rod. The water collection shell is provided with a water inlet, and water spray holes are provided on both sides thereof. The extrusion rod is slidably fitted in the water collection shell, and the driving mechanism is arranged next to the water collection shell. The closed cooling tower of the present invention collects the cooling water spilled between the heat exchange tubes through the water collection assembly, and re-sprays it to the lower area of ​​the heat exchange tubes, so as to achieve heat dissipation in the lower area of ​​the heat exchange tubes.

Description

Technical Field

[0001] The invention relates to the technical field of cooling towers, in particular to a closed cooling tower. Background Art

[0002] Closed cooling tower, also known as closed cooling tower or evaporative air cooler, is a special cooling equipment. The working principle of closed cooling tower is based on wet cooling technology. When high-temperature industrial water is pumped into the cooling tower through a water pump, the water is forced to circulate to the cooling equipment at the top of the tower. Under the action of cooling filler, water and air are fully contacted and exchanged, transferring and consuming the heat in the water. The spray water evaporates on the outer wall of the coil to cool the cooling water flowing through the tube, and the fan is used to take away the generated water vapor in time. The cooled water enters the cooling water tank at the bottom of the tower, waiting to be used again. Closed cooling towers are widely used in various industrial fields and municipal construction.

[0003] A Chinese patent with authorization announcement number CN116892839B discloses a closed energy-saving cooling tower, which includes a tower body, air inlet ends are symmetrically arranged on both sides of the tower body, an air outlet end is arranged on the top of the tower body, a heat exchange coil is fixedly connected in the tower body, the heat exchange coil is connected to the medium that needs to be cooled in the outside world, a spray piece is arranged on the top side of the heat exchange coil, a water tank is arranged at the bottom of the tower body, the spray piece is connected to the water tank, a recovery component is fixedly connected in the tower body, the recovery component includes a top plate located at the top of the tower body, recovery channels symmetrically arranged on both sides of the top plate, and a bottom plate fixedly connected to the bottom of the symmetrically arranged recovery channels, the recovery channel is arranged above the air inlet end, both sides of the recovery channel are sealed with the inner wall of the tower body, the heat exchange coil is located between the top plate and the bottom plate, and the heat exchange coil is located between the symmetrically arranged recovery channels, the recovery component changes the airflow direction in the tower body, and a collection tank is slidably inserted at the bottom of the symmetrically arranged recovery channels.

[0004] The above patent utilizes a bottom plate, a recovery channel and a top plate to allow the airflow to enter the recovery channel after passing through the heat exchange coil, and then recirculate from the top of the recovery channel to the air outlet, thereby extending the flow path of the airflow, causing a certain degree of blockage in the flow of the airflow in the recovery channel, increasing the contact area of ​​the airflow in the recovery channel, and enhancing the condensation effect. The formed condensed water will accumulate at the bottom of the recovery channel; the recovered water at the bottom of the recovery channel and the condensed water droplets attached to the inner wall of the recovery channel are used to capture impurities carried in the airflow, thereby reducing the content of moisture and impurities in the exhaust airflow.

[0005] However, the spraying element of the above patent cannot effectively cool the back of the pipe when spraying cooling water to the pipe. What flows to the back is hot water that has already contacted the pipe, and the cooling effect on the back is poor. Summary of the invention

[0006] The invention provides a closed cooling tower, aiming to solve the problem of poor cooling effect in the lower half of a pipeline in the related art.

[0007] The closed cooling tower of the present invention comprises: a shell, a spray device, and a water collection component;

[0008] A water collecting tank is provided at the bottom of the shell, and a plurality of heat exchange tubes are also provided in the shell, and the plurality of heat exchange tubes are connected end to end to form a heat exchange coil;

[0009] The spray device is located above the heat exchange tube and is connected to the water collecting tank;

[0010] The water collecting assembly includes a water collecting shell, a fixing rod, an extrusion rod and a driving mechanism. The water collecting shell is located between two adjacent heat exchange tubes, with a height lower than the corresponding heat exchange tubes, and is connected to the shell through a fixing rod. A water inlet is provided on the water collecting shell, and water spray holes are provided on both sides thereof. The extrusion rod is slidably fitted in the water collecting shell. The driving mechanism is arranged next to the water collecting shell, and is used to push the extrusion rod to move in the water collecting shell, thereby squeezing the water in the water collecting shell and causing it to spray out from the water spray holes.

[0011] Beneficial effect: Part of the cooling water sprayed by the spray device falls on the upper surface of the heat exchange tube, and the other part falls on the water collecting shell and enters the water collecting shell through the water inlet. The driving mechanism drives the extrusion rod to move in the water collecting shell, thereby squeezing the cooling water in the water collecting shell. The cooling water is sprayed to the lower area of ​​the heat exchange tube through the water spray hole, thereby realizing heat exchange of the heat exchange tube as a whole.

[0012] Preferably, the water collecting shell is a V-shaped structure, and has two symmetrically distributed water collecting cavities inside the water collecting shell. The upper surface of the water collecting shell has a V-shaped groove, and the two water inlets are symmetrically distributed on both sides of the bottom of the V-shaped groove and are respectively connected to the corresponding water collecting cavities.

[0013] The effect is that the V-shaped groove can collect the cooling water that falls on the water collecting shell, and prevent the cooling water from sliding down from the peripheral side of the water collecting shell.

[0014] Preferably, each of the water collecting chambers is slidably fitted with an extrusion rod, a top end of the extrusion rod is provided with an extrusion plate, and a side wall of the extrusion plate is in contact with an inner wall of the water collecting chamber.

[0015] The effect is that the provision of the extrusion plate can reduce the contact area between the extrusion rod and the water collecting shell, thereby reducing the friction between the extrusion rod and the water collecting shell and increasing the service life of the equipment.

[0016] Preferably, the driving mechanism includes a driving member, a sliding seat and a driving rod, the driving member is arranged on the shell, the sliding seat is connected to the output end of the driving member, the sliding seat is provided with two sliding grooves distributed at intervals, each of the sliding grooves is slidably fitted with a driving rod, the driving rods are connected to the bottom ends of the corresponding extrusion rods, the two extrusion rods are cross-distributed, and the driving member is used to drive the sliding seat to move up and down, so that the two extrusion rods can move in the corresponding water collection chamber.

[0017] Preferably, a first baffle and a second baffle are further provided above the water collecting shell, the first baffle being able to abut against the heat exchange tube on one side of the water collecting shell, and the second baffle being able to abut against the heat exchange tube on the other side of the water collecting shell.

[0018] The effect is that when the first baffle and the second baffle abut against the heat exchange tube, they can prevent the cooling water sprayed on the heat exchange tube from flowing downward along the side wall of the heat exchange tube, and prevent the cooling water on the upper part of the heat exchange tube from flowing to the lower part of the heat exchange tube after heat exchange, thereby affecting the heat exchange efficiency of the lower part of the heat exchange tube.

[0019] Preferably, a first connecting rod is rotatably engaged with the first baffle plate, and a second connecting rod is rotatably engaged with the second baffle plate. The first connecting rod and the second connecting rod are cross-distributed, and both are rotatably connected to the water collecting housing through a rotating shaft, and the rotating shaft is located at the intersection of the two. A slider is slidably engaged with the first connecting rod, and the slider is connected to the first connecting rod through an elastic member. The second connecting rod has the same structure as the first connecting rod, and the slider is stopped and slidably engaged with the sliding seat.

[0020] The effect is that a scissor mechanism is formed between the first connecting rod and the second connecting rod, and the scissor mechanism is opened and closed by the up and down movement of the sliding seat, thereby pushing the first baffle plate and the second baffle plate closer to or away from each other, reducing the number of driving devices and reducing manufacturing costs.

[0021] Preferably, each side wall of the shell is provided with an air inlet, and a plurality of air inlets are provided to allow sufficient intake of cold air.

[0022] Preferably, a plurality of exhaust devices distributed at intervals are provided on the top of the shell, and the exhaust devices are used to extract water vapor in the shell.

[0023] By adopting the above technical solution, the beneficial effects of the present invention are:

[0024] According to the closed cooling tower of the present invention, the steam to be cooled enters the heat exchange tube, and the spray device sprays the cooling water in the water collecting tank. Part of the cooling water falls on the upper surface of the heat exchange tube. The water collecting component collects the cooling water sprinkled between the heat exchange tubes. This part of the cooling water enters the water collecting shell through the water inlet. The driving mechanism drives the extrusion rod to move in the water collecting shell, thereby squeezing the cooling water in the water collecting shell. The cooling water is re-sprayed to the lower area of ​​the heat exchange tube through the water spray hole, thereby realizing heat dissipation of the lower area of ​​the heat exchange tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the structure of a closed cooling tower according to an embodiment of the present invention.

[0026] Figure 2 It is a cross-sectional view of a closed cooling tower according to an embodiment of the present invention.

[0027] Figure 3 It is a schematic diagram of the position of the water collection component of an embodiment of the present invention.

[0028] Figure 4 It is a schematic diagram of the structure of a water collection component according to an embodiment of the present invention.

[0029] Figure 5 4 is a cross-sectional view of a water collecting housing according to an embodiment of the present invention.

[0030] Figure 6 yes Figure 4 Enlarged view of point A in the middle.

[0031] Figure 7 Schematic diagram of driving the first baffle and the second baffle according to an embodiment of the present invention.

[0032] Reference numerals:

[0033] 1. Shell; 2. Heat exchange tube; 21. Inlet; 22. Outlet; 3. Water collecting tank; 41. Spray pipe; 42. Nozzle; 43. Connecting pipe; 44. Water pump; 5. Water collecting assembly; 51. Water collecting shell; 511. Water spray hole; 512. Water inlet; 52. Fixed rod; 53. Extrusion rod; 541. Driving member; 542. Sliding seat; 543. Driving rod; 6. Extrusion plate; 7. First baffle; 8. Second baffle; 9. First connecting rod; 10. Second connecting rod; 11. Sliding block; 12. Elastic member; 13. Air inlet; 14. Exhaust device. DETAILED DESCRIPTION

[0034] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0035] like Figures 1 to 7As shown, the closed cooling tower of the present invention comprises: a shell 1, a spray device and a water collection component 5.

[0036] Specifically, Figures 1 to 3 As shown, a water collecting tank 3 is provided at the bottom of the shell 1, and cooling water is contained in the water collecting tank 3. A plurality of heat exchange tubes 2 are provided in the upper area of ​​the shell 1. The plurality of heat exchange tubes 2 are connected end to end and spaced apart to form a coil structure. An inlet 21 is provided at the top of the heat exchange coil, and an outlet 22 is provided at the bottom. A spray device is provided at the top of the shell 1, and is connected to the water collecting tank 3 through a pipeline. The spray device is used to spray cooling water onto the heat exchange tube 2. A water collecting assembly 5 is provided between the heat exchange tubes 2, and is used to collect cooling water that is not sprayed onto the heat exchange tubes 2, and to spray the cooling water onto the bottom of the heat exchange tubes 2 again.

[0037] like Figure 1 and Figure 2 As shown, each side wall of the housing 1 is provided with an air inlet 13, which is located above the water collecting tank 3. The air inlet 13 is used to introduce cold air into the housing 1. The cold air is used to ensure that the temperature of the cooling water in the water collecting tank 3 is at a relatively low level. The provision of multiple air inlets 13 can increase the amount of cold air introduced, thereby being able to quickly reduce the temperature of the cooling water in the water collecting tank 3. The top of the housing 1 is provided with multiple exhaust devices 14 distributed at intervals. The exhaust device 14 is an exhaust fan, which is used to extract water vapor in the housing 1 to ensure a dry environment for the housing 1.

[0038] like Figure 1 and Figure 2 As shown, the spray device includes a spray pipe 41, a connecting pipe 43 and a water pump 44. The spray pipe 41 is located above the heat exchange coil. A plurality of nozzles 42 are provided at the bottom end of the spray pipe 41. The spray pipe 41 is connected to the water pump 44 through the connecting pipe 43. The water pump 44 is connected to the water collection tank 3. The water pump 44 can pump the water in the water collection tank 3 into the spray pipe 41, and spray the water in the water collection tank 3 onto the heat exchange tube 2 through the nozzle 42.

[0039] like Figures 3 to 5As shown, the water collecting assembly 5 includes a water collecting shell 51, a fixing rod 52, an extruding rod 53 and a driving mechanism. There are multiple water collecting shells 51, and the multiple water collecting shells 51 are respectively located between the two adjacent heat exchange tubes 2 at the top. The height of the water collecting shell 51 is lower than the heat exchange tube 2 at the top. Each water collecting shell 51 is fixedly connected to the shell 1 through the fixing rod 52. The water collecting shell 51 is a V-shaped structure, and has two symmetrically distributed water collecting cavities inside. The two sides of the water collecting shell 51 have two groups of symmetrically distributed water spray holes 511, and each group of water spray holes 511 is connected to the corresponding water collecting cavity. The two groups of water spray holes 511 face the heat exchange tubes 2 on both sides of the water collecting shell 51. A V-shaped groove is also provided on the top of the water collecting shell 51, and water inlets 512 are provided on both sides of the bottom of the V-shaped groove. Each water inlet 512 is connected to a water collecting cavity respectively. The cooling water sprayed by the spray device can be collected in the V-shaped groove and enter the two water collecting cavities through the two water inlets 512. Each water collecting chamber is slidably fitted with an extrusion rod 53, and an extrusion plate 6 is provided at the top end of the extrusion rod 53. The side wall of the extrusion plate 6 fits with the inner wall of the water collecting chamber, and the bottom end of the extrusion rod 53 passes through the water collecting shell 51 and extends out of the water collecting shell 51. Cooling water enters between the extrusion plate 6 and the water collecting shell 51 through the water inlet 512. The driving mechanism is used to drive the extrusion rod 53 to move in the water collecting chamber. The water in the water collecting chamber is squeezed by the extrusion plate 6 and sprayed to the bottom end of the heat exchange tube 2 from the water spray hole 511.

[0040] The two driving mechanisms are symmetrically distributed on both sides of the water collecting shell 51, and the driving mechanisms include a driving member 541, a sliding seat 542 and a driving rod 543. The driving member 541 is a hydraulic cylinder, which is fixedly connected to the water collecting shell 51. The output end of the driving member 541 is connected to multiple sliding seats 542, each sliding seat 542 corresponds to a water collecting shell 51, and the sliding seat 542 is provided with two sliding grooves distributed at intervals. A driving rod 543 is slidably fitted in each sliding groove, and each driving rod 543 is fixedly connected to its corresponding extrusion rod 53. The driving member 541 is used to drive the sliding seat 542 to move up and down. The sliding seat 542 moves upward to push the extrusion rod 53 to move upward along the water collecting chamber, and the extrusion plate 6 can squeeze the water in the water collecting chamber. At this time, the two driving rods 543 slide in the corresponding sliding grooves and approach each other, and the sliding seat 542 moves downward to restore the extrusion plate 6 to its original position.

[0041] like Figure 4 , Figure 6 and Figure 7As shown, a first baffle plate 7 and a second baffle plate 8 are also provided above the water collecting housing 51, a first connecting rod 9 is provided between the first baffle plate 7 and the sliding seat 542, a second connecting rod 10 is provided between the second baffle plate 8 and the sliding seat 542, the first connecting rod 9 and the second connecting rod 10 are cross-distributed, the first connecting rod 9 and the second connecting rod 10 are both rotatably connected to the water collecting housing 51 through a rotating shaft, the rotating shaft is located at the intersection of the first connecting rod 9 and the second connecting rod 10, the bottom end of the first connecting rod 9 is slidably matched with a slider 11, the slider 11 can slide along the length direction of the first connecting rod 9, the slider 11 is elastically connected to the first connecting rod 9 through an elastic member 12, the elastic member 12 is a spring, the second connecting rod 10 has the same structure as the first connecting rod 9, the two sliders 11 are both stopped against the sliding seat 542, and can slide on the sliding seat 542, the top end of the first connecting rod 9 is rotatably connected to the first baffle plate 7, the top end of the second connecting rod 10 is rotatably connected to the second baffle plate 8, and a scissors mechanism is formed between the first connecting rod 9 and the second connecting rod 10. When the sliding seat 542 moves upward, the sliding seat 542 pushes the two sliding blocks away from each other, thereby opening the scissor mechanism, and the first baffle plate 7 and the second baffle plate 8 move away from each other until the first baffle plate 7 and the second baffle plate 8 respectively stop against the heat exchange tubes 2 on both sides of the water collecting shell 51. When the first baffle plate 7 and the second baffle plate 8 stop against the heat exchange tubes 2, they can prevent the cooling water sprayed on the heat exchange tubes 2 from flowing downward along the side walls of the heat exchange tubes 2, and prevent the cooling water in the upper part of the heat exchange tubes 2 from flowing to the lower part of the heat exchange tubes 2 after heat exchange, thereby affecting the heat exchange efficiency of the lower part of the heat exchange tubes 2.

[0042] According to the closed cooling tower of the present invention, the steam or liquid to be cooled enters the heat exchange tube 2 from the inlet 21, and then the water pump 44 pumps the cooling water in the water collection tank 3 to the spray pipe 41, and the cooling water is sprayed from the nozzle 42 at the bottom of the spray pipe 41, and falls downward under the action of gravity, wherein a part of the cooling water falls on the upper surface of the uppermost heat exchange tube 2, and a part of this part of the cooling water absorbs heat and evaporates to form water vapor, and the water vapor is discharged from the shell 1 through the exhaust device 14, and the remaining cooling water flows downward along the side wall of the heat exchange tube 2; the other part of the cooling water is sprinkled on The cooling water in the V-shaped groove is collected at the bottom of the V-shaped groove and enters the two water collection chambers through the two water inlets 512. The driving member 541 drives the sliding seat 542 to move upward, and the extrusion plate 6 squeezes the cooling water in the water collection chamber. The cooling water is sprayed onto the lower surface of the uppermost heat exchange tube 2 through the water spray hole 511. When the sliding seat 542 moves upward, the first baffle 7 and the second baffle 8 respectively stop the heat exchange tube 2 on both sides of the water collection shell 51, thereby preventing the cooling water above the heat exchange tube 2 from flowing downward, and ensuring the heat exchange efficiency of the cooling water sprayed from the water collection chamber to the lower area of ​​the heat exchange tube 2. After heat exchange, the steam or liquid in the heat exchange tube 2 is discharged from the outlet 22, and the high-temperature cooling water after heat exchange falls into the water collection chamber. The air inlet 13 introduces cold air into the shell 1, and the hot water in the water collection chamber exchanges heat with the cold air, thereby reducing the water temperature in the water collection chamber.

[0043] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0044] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0045] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A closed cooling tower, comprising: A shell, wherein a water collecting tank is provided at the bottom of the shell, and a plurality of heat exchange tubes are also provided in the shell, wherein the plurality of heat exchange tubes are connected end to end to form a heat exchange coil; A spray device, the spray device is located above the heat exchange tube and is connected to the water collecting tank; The characteristic is that: a water collecting assembly is also provided, and the water collecting assembly includes a water collecting shell, a fixing rod, an extrusion rod and a driving mechanism. The water collecting shell is located between two adjacent heat exchange tubes, and its height is lower than the corresponding heat exchange tube, and is connected to the shell through a fixing rod. A water inlet is provided on the water collecting shell, and water spray holes are provided on both sides thereof. The two groups of water spray holes are respectively facing the heat exchange tubes on both sides of the water collecting shell. The extrusion rod is slidably fitted in the water collecting shell. The driving mechanism is arranged next to the water collecting shell, and is used to push the extrusion rod to move in the water collecting shell, thereby squeezing the water in the water collecting shell to make it spray out from the water spray holes.

2. The closed cooling tower according to claim 1, characterized in that: The water collecting shell is a V-shaped structure, and has two symmetrically distributed water collecting cavities inside. The upper surface of the water collecting shell has a V-shaped groove, and the two water inlets are symmetrically distributed on both sides of the bottom of the V-shaped groove and are respectively connected to the corresponding water collecting cavities.

3. The closed cooling tower according to claim 2, characterized in that: Each water collecting cavity is slidably fitted with an extrusion rod, a top end of the extrusion rod is provided with an extrusion plate, and a side wall of the extrusion plate is in contact with the inner wall of the water collecting cavity.

4. The closed cooling tower according to claim 3, characterized in that: The driving mechanism includes a driving member, a sliding seat and a driving rod. The driving member is arranged on the shell, and the sliding seat is connected to the output end of the driving member. The sliding seat is provided with two sliding grooves distributed at intervals, and each sliding groove is slidably fitted with a driving rod. The driving rods are connected to the bottom ends of the corresponding extrusion rods, and the two extrusion rods are cross-distributed. The driving member is used to drive the sliding seat to move up and down, so that the two extrusion rods can move in the corresponding water collection chamber.

5. The closed cooling tower according to claim 4, characterized in that: A first baffle and a second baffle are also provided above the water collecting shell. The first baffle can abut against the heat exchange tube on one side of the water collecting shell, and the second baffle can abut against the heat exchange tube on the other side of the water collecting shell.

6. The closed cooling tower according to claim 5, characterized in that: A first connecting rod is rotatably engaged with the first baffle plate, and a second connecting rod is rotatably engaged with the second baffle plate. The first connecting rod and the second connecting rod are cross-distributed, and both are rotatably connected to the water collecting housing through a rotating shaft, and the rotating shaft is located at the intersection of the two. A slider is slidably engaged with the first connecting rod, and the slider is connected to the first connecting rod through an elastic member. The second connecting rod has the same structure as the first connecting rod, and the slider is stopped and slidably engaged with the sliding seat.

7. The closed cooling tower according to claim 1, characterized in that: Each side wall of the shell is provided with an air inlet, and a plurality of air inlets are provided to allow sufficient intake of cold air.

8. The closed cooling tower according to claim 1, characterized in that: A plurality of exhaust devices are arranged at intervals on the top of the shell, and the exhaust devices are used to extract water vapor in the shell.

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