Water-saving closed cooling tower

Abstract

The application discloses a water-saving closed cooling tower, and relates to the technical field of cooling and temperature reduction. The water-saving closed cooling tower comprises a tower body, a wind guide pipe and a reversing assembly. A heat exchange cavity, a filling cavity, a water collecting cavity and an air guide cavity are sequentially arranged in the tower body from top to bottom. An air outlet is arranged on the tower body and communicates with the heat exchange cavity. The wind guide pipe sequentially passes through the heat exchange cavity, the filling cavity and the water collecting cavity and communicates with the air guide cavity. A plurality of first air guide outlets that communicate with the heat exchange cavity and a plurality of second air guide outlets that communicate with the filling cavity are arranged on the wind guide pipe. An end of the wind guide pipe away from the air guide cavity is closed. The reversing assembly comprises a plurality of first wind baffles that correspond to the positions of the second air guide outlets one by one. The plurality of first wind baffles are slidingly installed on the wind guide pipe. The wind cooling capacity of the cooling tower is improved, the critical temperature of the air cooling is improved, the proportion of the spray mode operation is prolonged, and the water saving capacity is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cooling technology, more particularly, to a water-saving closed cooling tower. BACKGROUND

[0002] The closed cooling tower is widely used in the circulating liquid cooling of industrial equipment such as power plants. The closed cooling tower mainly has three types of dry type, wet type and dry-wet combined type. The dry type cooling tower realizes the cooling of circulating liquid through air cooling. The wet type cooling tower realizes the cooling of circulating liquid through spraying. The dry-wet combined type cooling tower has the advantages of dry type cooling tower and wet type cooling tower. In the low temperature season, it operates in the air cooling mode. In the high temperature season, it operates in the air cooling and spraying mode, and has relatively stable cooling effect.

[0003] The water-saving capacity is one of the important indicators for measuring the dry-wet combined cooling tower. Especially for the dry-wet combined cooling tower used in arid areas, the water-saving capacity needs to be improved. In the low temperature environment, the dry-wet combined cooling tower cools through air cooling. When the environmental temperature rises to a critical value, air cooling is not enough to complete the cooling work, and spraying needs to be started to cooperate with air cooling to strengthen the cooling intensity. The operation of the spraying mode will evaporate water, thereby consuming water. The stronger the air cooling capacity of the dry-wet combined cooling tower, the higher the critical temperature, and the lower the proportion of the operation of the spraying mode. Therefore, the stronger the water-saving capacity, and vice versa. The weaker the air cooling capacity of the dry-wet combined cooling tower, the lower the critical temperature, and the higher the proportion of the operation of the spraying mode, resulting in the weaker water-saving capacity. Therefore, the air cooling capacity directly affects the comprehensive water-saving capacity of the cooling tower.

[0004] The air cooling system of the traditional dry-wet combined cooling tower acts on the heat exchange area of the circulating cooling liquid and the filler area of the spraying water. The air window corresponding to the heat exchange area and the filler area is arranged on one side of the tower body. In the air cooling and spraying dual mode operation, the airflow enters the exchange area and the filler area through the air window, and cools the circulating cooling liquid and the spraying water, respectively. In the dry-wet cooling mode, only the airflow passing through the heat exchange area cools the circulating cooling liquid. At this time, the filler area is a non-working area, and the airflow passing through the filler area does not participate in the cooling work of the circulating cooling liquid, resulting in a large loss of air cooling airflow. In turn, the higher the proportion of the operation of the spraying mode, the weaker the water-saving capacity.

[0005] In summary, how to reduce the loss of air cooling airflow in the cooling work is a problem that needs to be solved by the technical personnel in the field at present. SUMMARY

[0006] Therefore, the purpose of the present application is to provide a water-saving closed cooling tower, improve the air cooling capacity of the cooling tower, improve the critical temperature of the air cooling, and in turn improve the proportion of the operation of the spraying mode, and improve the water-saving capacity.

[0007] In order to achieve the above purpose, the present application provides the following technical scheme:

[0008] A water-saving closed cooling tower comprises:

[0009] A tower body, wherein a heat exchange cavity, a filling cavity, a water collecting cavity and an air guiding cavity are sequentially arranged from top to bottom in the tower body, an air outlet is arranged on the tower body and is communicated with the heat exchange cavity, and the air guiding cavity is communicated with the outside;

[0010] An air guiding pipe, wherein the air guiding pipe sequentially passes through the heat exchange cavity, the filling cavity and the water collecting cavity, is communicated with the air guiding cavity, a plurality of first air guiding outlets communicated with the heat exchange cavity are arranged on the air guiding pipe, a plurality of second air guiding outlets communicated with the filling cavity are arranged on the air guiding pipe, and an end of the air guiding pipe away from the air guiding cavity is closed;

[0011] A reversing assembly, wherein a plurality of first air baffle plates corresponding to the positions of the second air guiding outlets are arranged on the air guiding pipe.

[0012] Further, a heat exchange pipe is arranged in the heat exchange cavity, a filling material is arranged in the filling cavity, and an air outlet fan is arranged on the air outlet.

[0013] Further, the air guiding cavity is in a conical shape, an air guiding fan is arranged in the air guiding cavity and is coaxially arranged with the air guiding pipe, the tower body is provided with a plurality of air inlets communicated with the air guiding cavity, and the plurality of air inlets are distributed in a circular array along the axis of the air guiding pipe.

[0014] Further, a spraying assembly is arranged in the tower body, and the spraying assembly comprises a plurality of spray heads arranged on the top of the heat exchange pipe.

[0015] Further, the spraying assembly further comprises:

[0016] A water pump, wherein the water pump is arranged on the tower body, and the water inlet of the water pump is communicated with the water collecting cavity.

[0017] A water supply pipe, wherein the two ends of the water supply pipe are respectively communicated with the spray head and the water outlet of the water pump.

[0018] Further, the spraying assembly further comprises:

[0019] A filter plate, wherein the filter plate is arranged on the top of the water collecting cavity and is arranged on the tower body.

[0020] Further, a connecting cavity is arranged in the tower body, the connecting cavity is arranged between the heat exchange cavity and the filling cavity, a plurality of third air guiding outlets communicated with the connecting cavity are arranged on the air guiding pipe, and the reversing assembly further comprises a plurality of second air baffle plates corresponding to the positions of the third air guiding outlets.

[0021] Further, the reversing assembly further comprises:

[0022] The connecting piece is arranged in the air guide pipe, and is used for connecting the first baffle and the second baffle.

[0023] Further, the reversing assembly further comprises:

[0024] The driving piece is arranged on the tower body, and is used for controlling the rotation of the connecting piece along the axis of the air guide pipe.

[0025] Further, the exhaust port is hingedly connected with a plurality of grid plates in parallel along the axis of the air guide pipe.

[0026] The water-saving closed cooling tower provided by the application comprises a tower body, a heat exchange cavity, a filling cavity, a water collecting cavity and an air guide cavity arranged in the tower body from top to bottom, an exhaust port arranged on the tower body and in communication with the heat exchange cavity, and an air guide pipe arranged in the tower body and in communication with the air guide cavity. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description only are the embodiments of the present application, and for those skilled in the art, other drawings can also be obtained based on the provided drawings without any creative effort.

[0028] Figure 1 Structure diagram of the mixed mode provided by the present application;

[0029] Figure 2 Structure diagram of the air-cooling mode provided by the present application;

[0030] Figure 3 Structure diagram of the air deflector provided by the present application;

[0031] Figure 4 Structure diagram of the heat exchange pipe provided by the present application;

[0032] Figure 5 Structure diagram of the filling cavity provided by the present application;

[0033] Figure 6 Structure diagram of the tower body section provided by the present application;

[0034] Figure 7 Structure diagram of the grid plate local amplification provided by the present application.

[0035] Figures 1-7 In the drawings, the reference signs include:

[0036] 1, tower body;

[0037] 2, heat exchange cavity; 201, heat exchange pipe; 202, liquid tank; 203, water inlet pipe; 204, water outlet pipe; 205, rib plate;

[0038] 3, connection cavity; 301, surrounding plate;

[0039] 4, filling cavity; 401, upper mesh plate; 402, lower mesh plate; 403, filling material; 404, partition plate;

[0040] 5, water collecting cavity;

[0041] 6, air guiding cavity; 601, air guiding fan; 602, air inlet;

[0042] 7, air outlet;

[0043] 8, air guiding pipe; 801, first air guiding opening; 802, second air guiding opening; 803, third air guiding opening;

[0044] 9, reversing assembly; 901, first baffle; 902, second baffle; 903, connecting piece; 904, driving piece; 905, rotating shaft;

[0045] 10, spraying assembly; 1001, spray head; 1002, water supply pipe; 1003, water pump; 1004, filter plate;

[0046] 11, grid plate; 1101, limiting piece; 1102, limiting block. DETAILED DESCRIPTION

[0047] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0048] The core of the present application is to provide a water-saving closed cooling tower to improve the air cooling capacity of the cooling tower, increase the critical temperature of air cooling, and thus increase the proportion of the running time of the spraying mode and improve the water-saving capacity.

[0049] Please refer to Figure 2 A water-saving closed cooling tower, comprising a tower body 1, a wind guide pipe 8 and a reversing assembly 9, the tower body 1 is provided with, from top to bottom, a heat exchange cavity 2, a filling cavity 4, a water collecting cavity 5 and an air guide cavity 6, the tower body 1 is provided with an air outlet 7 communicating with the heat exchange cavity 2, the wind guide pipe 8 passes through the heat exchange cavity 2, the filling cavity 4 and the water collecting cavity 5 in sequence and communicates with the air guide cavity 6, the wind guide pipe 8 is provided with a plurality of first air guide openings 801 communicating with the heat exchange cavity 2, a plurality of second air guide openings 802 communicating with the filling cavity 4, and an end of the wind guide pipe 8 away from the air guide cavity 6 is closed, the reversing assembly 9 comprises a plurality of first baffle plates 901 corresponding to the positions of the second air guide openings 802, and the plurality of first baffle plates 901 are slidingly installed on the wind guide pipe 8.

[0050] It should be noted that the tower body 1 in the embodiments of the present application is in the shape of a cylinder or other shapes, and the bottom of the tower body 1 is supported by a ring-shaped support.

[0051] Optionally, in some embodiments, the wind guide pipe 8 is arranged coaxially with the tower body 1, and the wind guide pipe 8 can be made of any hard material, such as metal, PVC, PE, etc.

[0052] Optionally, in some embodiments, the number of the first air guide openings 801 can be set according to requirements, and the sum of the opening angles of the plurality of first air guide openings 801 is greater than 350 degrees.

[0053] Optionally, in some embodiments, a rear exhaust fan is installed at the exhaust outlet 7, which can help to enhance the flow of air.

[0054] Optionally, in some embodiments, the first baffle plate 901 can slide along the axis of the air guide pipe 8 or slide along the circumference of the air guide pipe 8, both of which can achieve the closing and opening of the second air guide outlet 802.

[0055] In the above embodiment, a slide is installed in the air guide pipe 8 along the moving direction of the first baffle plate 901, and the first baffle plate 901 is slidingly installed in the slide to improve the smoothness of the first baffle plate 901 sliding.

[0056] In the above embodiment, the position of the first baffle plate 901 can be manually controlled, or an electric device can be used to control the position of the first baffle plate 901.

[0057] In use, the heat exchange chamber 2, the filling chamber 4, the water collecting chamber 5 and the air guide chamber 6 are arranged in the tower body 1 from top to bottom, the exhaust outlet 7 is arranged on the tower body 1 and communicates with the heat exchange chamber 2, the air guide pipe 8 is arranged in the tower body 1 and sequentially passes through the heat exchange chamber 2, the filling chamber 4 and the water collecting chamber 5, and communicates with the air guide chamber 6, the air guide pipe 8 is provided with a plurality of first air guide outlets 801 which communicate with the heat exchange chamber 2, and a plurality of second air guide outlets 802 which communicate with the filling chamber 4, and the end of the air guide pipe 8 away from the air guide chamber 6 is closed, that is, the air guide pipe 8 introduces the cold air in the air guide chamber 6 into the heat exchange chamber 2 through the first air guide outlet 801 to achieve the heat exchange cooling function, and the hot air after heat exchange is discharged in time through the exhaust outlet 7, wherein the reversing assembly 9 includes a plurality of first baffle plates 901 which correspond one-to-one to the positions of the second air guide outlets 802, and the plurality of first baffle plates 901 are slidingly installed in the air guide pipe 8, when only air is used for heat dissipation, the plurality of first baffle plates 901 correspond one-to-one to the positions of the second air guide outlets 802 to block the second air guide outlets 802, so that air can only enter the heat exchange chamber 2 through the first air guide outlet 801, avoiding the blocking of air flow by the filling chamber 4 in the non-working state, increasing the air flow intensity through the heat exchange chamber 2, and further improving the air cooling effect, improving the critical temperature of the switching spray mode, reducing the proportion of the spray mode, and further improving the water-saving capacity of the cooling tower.

[0058] Please refer to Figure 1 In some embodiments, the heat exchange chamber 2 is provided with heat exchange pipes 201 which communicate with the heat exchange equipment required to achieve heat exchange, and the filling chamber 4 is provided with filling material 403 which is used to cool the water after heat exchange.

[0059] Optionally, in some embodiments, a plurality of groups of annular heat exchange pipes 201 are arranged vertically, and each group of annular heat exchange pipes 201 is concentrically distributed in the horizontal direction to have gaps between the annular heat exchange pipes 201 to improve the flow of air in the interior thereof.

[0060] Optionally, in some embodiments, the annular heat exchange pipe 201 is made of copper alloy.

[0061] Optionally, in some embodiments, a liquid tank 202 is further included, the liquid tank 202 is provided with two independent cavities, the two independent cavities are respectively provided with an inlet pipe 203 and an outlet pipe 204, the annular heat exchange pipe 201 is connected to the two independent cavities of the liquid tank 202 at the head and tail, and the inlet pipe 203 and the outlet pipe 204 are respectively connected to the pipeline of the circulating cooling medium.

[0062] Optionally, in some embodiments, temperature sensors are installed on the inlet pipe 203 and the outlet pipe 204, the temperature difference of the cooling medium monitored by the two temperature sensors is used to determine the cooling range, and the switching time of the cooling mode can be determined according to the determination data.

[0063] Optionally, in some embodiments, a plurality of radially extending rib plates 205 are annularly distributed around the annular heat exchange pipe 201, the rib plates 205 are fixed to all the annular heat exchange pipes 201 and are fixedly connected to the heat exchange pipes 201 to realize overall fixation of the heat exchange pipe 201 group.

[0064] Optionally, in some embodiments, the filling cavity 4 is filled with filling material 403, and the filling material 403 is in the form of dripping, and after the sprayed water passes through the heat exchange pipe 201, the sprayed water falls through the filling material 403 in the form of dripping to realize cooling of the sprayed water.

[0065] Optionally, in some embodiments, the filling cavity 4 is provided with upper mesh plates 401 and lower mesh plates 402 which are parallelly distributed at the upper and lower positions, the upper mesh plates 401 and the lower mesh plates 402 are annular, and the upper mesh plates 401 and the lower mesh plates 402 are uniformly provided with a plurality of water passing holes to make the sprayed water sufficiently drip.

[0066] Optionally, in some embodiments, a plurality of partition plates 404 are annularly distributed and fixed between the upper mesh plates 401 and the lower mesh plates 402, the filling cavity 4 between the upper mesh plates 401 and the lower mesh plates 402 is divided into a plurality of independent areas by the partition plates 404, the filling material 403 is arranged in the areas between the plurality of partition plates 404, and the split structure facilitates installation and maintenance of the filling material 403.

[0067] Optionally, in some embodiments, the filling cavity 4 is formed by the two blocking nets, the upper mesh plates 401 and the lower mesh plates 402 at the outer diameter edges of the two sides of the upper mesh plates 401 and the lower mesh plates 402.

[0068] Please refer to Figure 1In some embodiments, the air inlet cavity 6 is conical in cross section, and an air inlet fan 601 is arranged in the air inlet cavity 6 coaxially with the air guide pipe 8. When the air cooler is in operation, the air inlet fan 601 is turned on to suck in the external cold air. The conical air inlet cavity 6 can reduce the air flow resistance. The tower body 1 is provided with a plurality of air inlets 602 communicating with the air inlet cavity 6. The air inlets 602 are arranged in a circumferential array along the axis of the air guide pipe 8.

[0069] Optionally, in some embodiments, a filter structure is arranged at the air inlet 602 to filter the incoming air to avoid damaging the air inlet fan 601.

[0070] In the above embodiments, the filter structure is filter cotton or filter screen, which can block foreign matter or living things from entering the interior.

[0071] Please refer to Figure 1 In some embodiments, the tower body 1 is provided with a spraying assembly 10. The spraying assembly 10 includes a plurality of spray heads 1001 arranged at the top of the heat exchange pipes 201. The spray heads 1001 uniformly disperse the spraying water onto the heat exchange pipes 201.

[0072] Optionally, in some embodiments, the tower body 1 is further provided with a rotating shaft 905 which is a hollow shaft. A plurality of water distribution pipes are arranged on the rotating shaft 905 in communication. The spray heads 1001 are mounted at the ends of the water distribution pipes. The tower body 1 is further provided with a motor to drive the rotating shaft 905 to rotate. Therefore, the rotating shaft 905 is controlled to rotate by the rotating motor during use, thereby driving the spray heads 1001 to rotate along the axis of the tower body 1, further improving the uniformity of the spraying water spraying, and improving the heat exchange and cooling effect of the heat exchange pipes 201.

[0073] Please refer to Figure 1 In some embodiments, the spraying assembly 10 further includes a water pump 1003 and a water supply pipe 1002. The water pump 1003 is mounted on the tower body 1. The water inlet of the water pump 1003 communicates with the water collecting cavity 5. The two ends of the water supply pipe 1002 respectively communicate with the spray heads 1001 and the water outlet of the water pump 1003. That is, the spraying water in the water collecting cavity 5 is reused by the water pump 1003, and the water pump 1003 can also provide pressure for the high-pressure jet flow of the spray heads 1001.

[0074] Optionally, in some embodiments, the water pump 1003 can be a high-pressure water pump 1003, and the water supply pipe 1002 can be arranged outside the tower body 1.

[0075] Please refer to Figure 1 In some embodiments, the spraying assembly 10 further includes a filter plate 1004 arranged at the top of the water collecting cavity 5 and mounted on the tower body 1. The filter plate 1004 filters the spraying water after heat exchange to avoid affecting the water pump 1003.

[0076] Optionally, in some embodiments, the water collecting cavity 5 is formed by a groove at the bottom of the tower body 1, and specifically, an annular groove plate arranged at the bottom of the tower body 1.

[0077] Please refer to Figure 1 In some embodiments, the tower body 1 is further provided with a linking cavity 3 between the heat exchange cavity 2 and the filling cavity 4, the air guide pipe 8 is provided with a plurality of third air guide openings 803 in communication with the linking cavity 3, and the reversing assembly 9 further includes a plurality of second air baffle plates 902 corresponding to the third air guide openings 803 in position. Therefore, in use, the air can enter the linking cavity 3 through the third air guide openings 803, and then contact the heat exchange pipe 201 upwardly through the linking cavity 3, so as to realize more directional air cooling heat dissipation of the heat exchange pipe 201 and improve the heat exchange efficiency.

[0078] Optionally, in some embodiments, the linking cavity 3 is provided with a surrounding plate 301 on the side away from the air guide pipe 8, which is used to surround the linking cavity 3 to guide the air flow to flow upwardly through the heat exchange pipe 201, thereby improving the heat exchange efficiency.

[0079] In the above embodiments, the surrounding plate is in a plate structure, and is inclined toward the air guide pipe 8, so as to guide the air to the heat exchange pipe 201, thereby improving the flow through the heat exchange pipe 201.

[0080] In other embodiments, an air guide plate can be installed on the air guide pipe 8, and the air guide plate is located at the bottom of the third air guide opening 803, which is used to guide the air to the heat exchange pipe 201, thereby improving the flow through the heat exchange pipe 201.

[0081] Please refer to Figure 1 In some embodiments, the reversing assembly 9 further includes a connecting piece 903 arranged in the air guide pipe 8, which is used to connect the first air baffle plate 901 and the second air baffle plate 902. When the first air baffle plate 901 is in a state of closing the second air guide opening 802, the third air guide opening 803 is in a state of communication with the filling cavity 4. When the second air baffle plate 902 is in a state of closing the third air guide opening 803, the second air guide opening 802 is in a state of communication with the linking cavity 3. That is to say, the linking cavity 3 is only in communication with the air guide pipe 8 during the air cooling process, and the air does not pass through the filling cavity 4 during the air cooling process, thereby reducing the air loss. In this mode, the air flow is introduced from the inner side and the bottom of the heat exchange cavity 2 in two directions, thereby increasing the air flow through the heat exchange cavity 2 and improving the heat exchange efficiency.

[0082] Optionally, in some embodiments, the connecting member 903 comprises a rotating shaft 905 coaxially arranged with the tower body 1, and a plurality of connecting rods are mounted on the rotating shaft 905, and the connecting rods are connected with the corresponding baffle plates respectively to adjust the positions of the baffle plates.

[0083] In other embodiments, the baffle plates are formed by a cylindrical structure, and a plurality of communication holes corresponding to the air guide openings are arranged on the baffle plate, so that the opening and closing of the air guide openings can be controlled by rotating the baffle plate.

[0084] Please refer to Figure 1 In some embodiments, the reversing assembly 9 further comprises a driving member 904 mounted on the tower body 1, and the driving member 904 is used to control the rotation of the connecting member 903 along the axis of the air guide pipe 8, that is, the driving member 904 is used to automatically control the closing of the air guide openings.

[0085] Optionally, in some embodiments, the driving member 904 adopts a motor, and the motor is used to control the rotation of the rotating shaft 905, and a control system is further included, and the motor and the temperature sensor are electrically connected with the control system, so that the tower body 1 can automatically control the switching of the air guide openings in different modes.

[0086] Please refer to Figure 1 In some embodiments, a plurality of grating plates 11 are hingedly arranged along the axis of the air guide pipe 8 at the air outlet 7, and the grating plates 11 are hingedly mounted on the tower body 1, and the external wind direction guiding effect can be achieved by rotating the grating plates 11, so that the external wind can flow along the outer wall of the tower body 1, and the external wind is prevented from flowing into the tower body 1 through the air outlet 7 to affect the internal air flow.

[0087] Optionally, in some embodiments, the minimum distance between two adjacent grating plates 11 is less than the width of the grating plate 11.

[0088] Optionally, in some embodiments, the grating plate 11 is provided with a limiting block 1102 near the end of the tower body 1, and the tower body 1 is provided with a limiting member 1101 for limiting the maximum rotation angle of the grating plate 11, so as to limit the maximum rotation angle of the grating plate 11.

[0089] That is, the focus of the present application is that the tower body 1 is provided with an exhaust port 7 communicated with the heat exchange cavity 2, and a wind guide pipe 8 is arranged in the tower body 1, the wind guide pipe 8 sequentially passes through the heat exchange cavity 2, the filling cavity 4 and the water collecting cavity 5, and is communicated with the air guide cavity 6, the wind guide pipe 8 is provided with a plurality of first air guide ports 801 communicated with the heat exchange cavity 2, a plurality of second air guide ports 802 communicated with the filling cavity 4, and an end of the wind guide pipe 8 away from the air guide cavity 6 is closed, that is, the wind guide pipe 8 introduces the cold air entering the air guide cavity 6 into the heat exchange cavity 2 through the first air guide port 801 to realize the heat exchange cooling function, and the hot air after heat exchange is discharged in time through the exhaust port 7, wherein the reversing assembly 9 includes a plurality of first air baffle plates 901 corresponding one-to-one with the positions of the second air guide ports 802, and the plurality of first air baffle plates 901 are slidingly installed on the wind guide pipe 8, when only air is used for heat dissipation, the plurality of first air baffle plates 901 shield the positions of the second air guide ports 802 one-to-one, so that the air can only enter the heat exchange cavity 2 through the first air guide port 801, avoiding the blocking of the air flow by the filling cavity 4 in the non-working state, increasing the air flow intensity through the heat exchange cavity 2, and further improving the air cooling effect, improving the critical temperature of the switching spray mode, reducing the proportion of the spray mode, and further improving the water saving capacity of the cooling tower.

[0090] The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the difference from other embodiments, and the same or similar parts between the various embodiments can be referred to each other.

[0091] The above describes in detail the water-saving closed cooling tower provided by the present application. The principles and implementation modes of the present application are described by applying specific examples in this paper, and the above description of the embodiments is only used to help understand the method of the present application and its core idea. It should be pointed out that for ordinary skilled in the art, without departing from the principles of the present application, the present application can be improved and modified in several ways, and these improvements and modifications also fall within the protection scope of the present application.

Claims

1. A water-saving closed-loop cooling tower, characterized in that, include: The tower body (1) is provided with a heat exchange chamber (2), a filling chamber (4), a water collection chamber (5) and an air duct (6) arranged from top to bottom. The tower body (1) is provided with an exhaust port (7) that communicates with the heat exchange chamber (2). The air duct (6) communicates with the outside. The air duct (8) passes through the heat exchange chamber (2), the filling chamber (4) and the water collection chamber (5) in sequence, and is connected to the air intake chamber (6). The air duct (8) is provided with a number of first air inlets (801) connected to the heat exchange chamber (2) and a number of second air inlets (802) connected to the filling chamber (4). The end of the air duct (8) away from the air intake chamber (6) is closed. The reversing assembly (9) includes a plurality of first baffles (901) that correspond one-to-one with the positions of the second air duct (802), and the plurality of first baffles (901) are slidably installed on the air duct (8).

2. The water-saving closed-loop cooling tower according to claim 1, characterized in that, The heat exchange chamber (2) is provided with a heat exchange tube (201), the filling chamber (4) is provided with a filling material (403), and an exhaust fan is installed at the exhaust port (7).

3. The water-saving closed-loop cooling tower according to claim 1, characterized in that, The cross-section of the air duct (6) is conical. The air duct (6) is equipped with an air duct fan (601) and is arranged coaxially with the air duct (8). The tower body (1) is provided with several air inlets (602) that are connected to the air duct (6). The several air inlets (602) are arranged in a circular array along the axis of the air duct (8).

4. The water-saving closed-loop cooling tower according to claim 2, characterized in that, The tower body (1) is provided with a spraying assembly (10), which includes a plurality of nozzles (1001) located at the top of the heat exchange tube (201).

5. The water-saving closed-loop cooling tower according to claim 4, characterized in that, The spraying assembly (10) also includes: A water pump (1003) is installed on the tower body (1), and the inlet of the water pump (1003) is connected to the water collection chamber (5); Water supply pipe (1002), the two ends of which are connected to the nozzle (1001) and the outlet of the water pump (1003), respectively.

6. The water-saving closed-loop cooling tower according to claim 5, characterized in that, The spraying assembly (10) also includes: A filter plate (1004) is placed on top of the water collection chamber (5) and installed on the tower body (1).

7. The water-saving closed-loop cooling tower according to any one of claims 1-6, characterized in that, The tower body (1) is also provided with a connecting cavity (3), which is located between the heat exchange cavity (2) and the filling cavity (4). The air duct (8) is provided with a number of third air ducts (803) that communicate with the connecting cavity (3). The reversing assembly (9) also includes a number of second baffles (902) that correspond one-to-one with the positions of the third air ducts (803).

8. The water-saving closed-loop cooling tower according to claim 7, characterized in that, The commutation component (9) further includes: Connector (903), the connector (903) is disposed in the air guide pipe (8), the connector (903) is used to connect the first wind baffle (901) and the second wind baffle (902). When the first wind baffle (901) is in the state of closing the second air guide port (802), the third air guide port (803) is in the state of communicating with the filling cavity (4). When the second wind baffle (902) is in the state of closing the third air guide port (803), the second air guide port (802) is in the state of communicating with the connecting cavity (3).

9. The water-saving closed-loop cooling tower according to claim 8, characterized in that, The commutation assembly (9) also includes: A drive unit (904) is installed on the tower body (1) and is used to control the connection (903) to rotate along the axis of the air duct (8).

10. The water-saving closed-loop cooling tower according to claim 9, characterized in that, At the exhaust port (7), several grid plates (11) are hinged in parallel to the axis of the air guide pipe (8). The grid plates (11) are hinged to the tower body (1). The minimum distance between two adjacent grid plates (11) is less than the width of the grid plate (11). A limiting member (1101) is installed on the tower body (1) to limit the maximum rotation angle of the grid plates (11).

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