A freeze protection system and method for a wet cooling tower

Abstract

This application discloses an antifreeze system and method for wet cooling towers. The cooling tower's support structure has an air inlet. The antifreeze system includes at least one ring of water spray components arranged around the support structure. Each water spray component comprises multiple blocks distributed circumferentially along the cooling tower. Each block includes a horizontally placed water pipe, and the lower surface of the water pipe has a water outlet structure or component. The water flow rate of the water pipes in different blocks can be independently controlled to achieve zoned and controllable formation of target water bodies for windbreak purposes. The antifreeze system for wet cooling towers of this application can better dynamically adapt to real-time operating conditions, ensuring antifreeze reliability while also considering operational economy.

Description

Technical Field

[0001] This application relates to the field of cooling tower technology, and in particular to an antifreeze system and method for wet cooling towers. Background Technology

[0002] In winter and other low-temperature conditions, the lower surface of the packing layer in wet cooling towers is prone to freezing, affecting the tower's efficiency. To minimize or eliminate freezing, antifreeze measures are necessary. However, current antifreeze systems for wet cooling towers generally suffer from the drawback of failing to simultaneously guarantee reliable antifreeze performance and economical operation. Summary of the Invention

[0003] In view of this, this application provides an antifreeze system and method for wet cooling towers, which can better dynamically adapt to real-time operating conditions and ensure antifreeze reliability while taking into account operating economy.

[0004] To achieve the above objectives, this application provides the following technical solution:

[0005] An antifreeze system for a wet cooling tower, wherein the tower support of the cooling tower has an air inlet, and the antifreeze system includes at least one ring of water spray components arranged around the tower support. The water spray components include multiple blocks distributed circumferentially along the cooling tower. Each block includes a horizontally placed water pipe, and the lower surface of the water pipe is provided with a water outlet structure or water outlet component. The water flow rate of the water pipe can be independently controlled by the blocks at different locations to achieve zoned and controllable formation of target water bodies for wind protection.

[0006] Optionally, the above-mentioned antifreeze system includes at least one of the following:

[0007] Multiple first temperature sensors are distributed on the packing support of the cooling tower in multiple sectors divided according to the number of blocks of a single ring of the water spray assembly, for detecting the temperature at the lower surface of the packing layer.

[0008] Multiple second temperature sensors are distributed around the periphery of the tower support, within multiple sectors divided according to the number of blocks in a single ring of the water spray assembly, for detecting air temperature;

[0009] Multiple wind speed sensors are distributed around the outer perimeter of the tower support, within multiple sectors divided according to the number of blocks in a single ring of the water spray assembly, to detect the airflow velocity blowing towards the air inlet.

[0010] Optionally, in the above-mentioned antifreeze system, the lower surface of the water pipe is provided with a water outlet for water to flow and form a water curtain to block the wind.

[0011] Optionally, in the above-described antifreeze system, the block includes a plurality of water pipes spaced apart from bottom to top, and each water pipe has one outlet.

[0012] Optionally, the above-described antifreeze system includes multiple rings of water spray assemblies distributed radially at intervals along the cooling tower, wherein the blocks corresponding to adjacent rings of water spray assemblies are located in the same sector, and the number of sectors is the same as the number of blocks in a single ring of water spray assemblies.

[0013] Optionally, in the above-mentioned antifreeze system, the lower surface of the water pipe is provided with multiple nozzles for spraying water to form a rain wall for wind protection.

[0014] Optionally, in the above-described antifreeze system, the block includes a plurality of water pipes distributed radially at intervals along the cooling tower.

[0015] A method for preventing freezing in a wet cooling tower, performed on an antifreeze system for a wet cooling tower as disclosed in any of the foregoing claims, the method comprising:

[0016] Determine the block corresponding to the sector where the air inlet of the cooling tower that requires wind protection is located;

[0017] Water is supplied to the designated area, and the water outlet from the water pipe is used to form a target water body for windbreak.

[0018] Optionally, in the above antifreeze method, the target water body is a water curtain, the initial water supply to the determined block is set to 110% of the preset standard flow rate, and during the process of adjusting the water supply to the determined block, the water supply varies within the range of 130% to 180% of the preset standard flow rate.

[0019] Optionally, in the above antifreeze method, the target water body is a rain wall, and the initial water supply to the determined block corresponds to the raindrop density value of the rain wall being a preset standard density value. During the process of adjusting the water supply to the determined block, the raindrop density value of the rain wall is varied within the range of 75% to 120% of the preset standard density value.

[0020] As can be seen from the above technical solution, in the anti-freezing system for wet cooling towers provided in this application, at least one ring of water spray components is arranged around the tower support (with an air inlet) of the cooling tower. The water spray components include multiple blocks distributed circumferentially along the cooling tower. Each block includes a horizontally placed water pipe. The water flow rate of the water pipes in different blocks can be independently controlled to achieve zoned and controllable formation of target water bodies for wind protection. During operation, water flows out from the water outlet structure or water outlet component set on the lower surface of the water pipe, thereby forming the target water body for wind protection. The target water body can increase the wind resistance outside the air inlet of the cooling tower, reduce the air intake at this location, and thus prevent freezing on the lower surface of the packing layer during winter and other low-temperature periods. Since the blocks in different locations are independent of each other, during operation, the target water body for wind protection can be formed only in specific blocks according to the needs of different areas, solving the anti-freezing problem in areas with freezing risk while ensuring normal ventilation in areas without freezing risk. In summary, the antifreeze system for wet cooling towers proposed in this application can better adapt to real-time operating conditions, ensuring antifreeze reliability while also taking into account operational economy. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of an antifreeze system for a wet cooling tower according to an embodiment of this application;

[0023] Figure 2 yes Figure 1 A three-dimensional schematic diagram of the water spray assembly of the antifreeze system shown.

[0024] Figure 3 yes Figure 2 A schematic diagram of the water pipes in the structure shown;

[0025] Figure 4 yes Figure 3 The diagram shows the water curtain formed by the water pipe under different water supply flow rates;

[0026] Figure 5 This is a schematic diagram showing the arrangement of the first temperature sensor on the lower surface of the packing layer in the cooling tower;

[0027] Figure 6 This is a schematic diagram of an antifreeze system for a wet cooling tower according to an embodiment of this application;

[0028] Figure 7 yes Figure 6A three-dimensional schematic diagram of the water spray assembly of the antifreeze system shown.

[0029] Figure 8 yes Figure 7 A schematic diagram of a single block in the structure shown.

[0030] The annotations in the attached figures are explained as follows:

[0031] 100. Tower body; 110. Tower body support; 120. Water collection tank; 130. Rain zone; 140. Packing layer; 150. Water distribution device; 160. Water removal device;

[0032] 200. Water spray assembly; 210. Water pipe; 211. Water outlet; 220. Water supply control module; 230. Nozzle;

[0033] 300, Supporting components; 400, Monitoring module; 500, Water curtain; 600, First temperature sensor. Detailed Implementation

[0034] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0035] In the description of this application, the references to terms such as "one embodiment," "some embodiments," "example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of those different embodiments or examples.

[0036] In the description of this specification, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0037] See Figures 1-8 This application provides an antifreeze system for a wet cooling tower. The tower support 110 of the cooling tower has an air inlet. The antifreeze system mainly includes at least one ring of water spray components 200 arranged around the tower support 110. The water spray components 200 include multiple blocks distributed along the circumference of the cooling tower. Each block includes a horizontally placed water pipe 210. The lower surface of the water pipe 210 is provided with a water outlet structure or water outlet component. The water flow of the water pipe 210 can be independently controlled by the blocks at different locations to achieve the formation of a target water body for wind protection in a zoned and controllable manner.

[0038] The tower support 110 is located at the bottom of the tower body 100 of the wet cooling tower. It is typically configured to include multiple repeating herringbone support structures arranged circumferentially along the cooling tower. The ventilation section of the tower support 110 serves as the air inlet for the cooling tower. Air flows into the interior of the tower body 100 from the air inlet and exchanges heat with the hot circulating water, thereby cooling the circulating water. The interior of the tower body 100 mainly includes, from bottom to top, a water collection tank 120, a rain zone 130, a packing layer 140, a water distribution device 150, and a water removal device 160. The hot circulating water is evenly distributed to the packing layer 140 through the water distribution device 150. The packing layer 140 is the main site for heat exchange between the air and the circulating water. After flowing through the packing layer 140, the circulating water falls in the rain zone 130 in a manner similar to rain, and finally falls into the water collection tank 120. It is then sent out of the cooling tower by a circulation power unit (such as a circulation pump). After heat exchange with the circulating water, the air rises to the dehumidifier 160, which is used to recover the moisture carried by the air, reducing the amount of circulating water lost by the air. The circulating water intercepted and recovered by the dehumidifier 160 falls to the packing layer 140, where it exchanges heat with the air together with the circulating water flowing out from the water distribution device 150.

[0039] The antifreeze system of this application includes a water spray assembly 200 disposed around the periphery of the cooling tower. The water spray assembly 200 is arranged around the tower support 110 and includes multiple blocks distributed circumferentially along the cooling tower. These blocks can independently control the water flow rate, that is, the water flow rate of each block can be adjusted individually. The blocks of the water spray assembly 200 mainly include horizontally placed water pipes 210. Water flows out from the water outlet structure or water outlet component provided on the lower surface of the water pipes 210, thereby forming a target water body for wind protection. The target water body can increase wind resistance outside the air inlet, reducing the air intake at this location. This prevents freezing on the lower surface of the packing layer 140 during low temperatures, such as in winter. Since the blocks in different locations are independent of each other, the target water body can be formed only in specific blocks to block the wind during operation, which solves the problem of freezing in areas at risk of freezing while ensuring normal ventilation in areas at risk of freezing. This ensures both the reliability of the antifreeze system and the economic efficiency of operation. In other words, the antifreeze system of this application can better dynamically adapt to real-time operating conditions, effectively balancing cooling efficiency and antifreeze safety.

[0040] The water spray assembly 200 is arranged in at least one ring around the perimeter of the cooling tower. In some embodiments, the blocks of the water spray assembly 200 can be configured to be evenly divided along the circumference of the cooling tower, that is, the central angles corresponding to the blocks of the same ring of the water spray assembly 200 are equal. For example, the number of blocks in a single ring of the water spray assembly 200 can be set to 12, and the central angle of each block is 30°, or the number of blocks in a single ring of the water spray assembly 200 can be set to 20, and the central angle of each block is 18°. Of course, in other embodiments, the blocks of the water spray assembly 200 can also be set to be non-uniformly divided, that is, in all the blocks of the same ring of the water spray assembly 200, at least two blocks have unequal central angles, for example, one block has a central angle of 18° and the other block has a central angle of 30°. It should be noted that when the water spray assembly 200 is set to multiple rings (i.e., two or more rings), each ring of water spray assembly 200 should be set up with blocks according to the same division structure, that is, the blocks corresponding to adjacent rings of water spray assembly 200 are located in the same sector (or the same central angle).

[0041] The water spray assembly 200 can have various structural options; see [link / reference]. Figure 2 In some embodiments, the single-ring water spray assembly 200 can be arranged in a fence-like shape; in such embodiments, the target water body can be set as a water curtain 500. See also Figure 7In some embodiments, the single-ring water spray assembly 200 can be arranged in a ring-shaped canopy. In such embodiments, the target water body can be set as a rain wall. A water curtain 500 refers to a relatively thin windbreak composed of water in the form of a continuous waterfall, while a rain wall refers to a relatively thick windbreak composed of water in the form of dense water droplets. It should be noted that the water spray assembly 200 in the antifreeze system can be a single structural form or a combination of multiple structural forms. For example, in some embodiments, each ring of water spray assembly 200 is arranged in a fence-like shape; in other embodiments, at least one ring of water spray assembly 200 is arranged in a fence-like shape, and at least one ring of water spray assembly 200 is arranged in a ring-shaped canopy. Furthermore, for a single-ring water spray assembly 200, the blocks of the water spray assembly 200 can be a single structural form or a combination of multiple structural forms. For example, in some embodiments, all blocks in the same ring of water spray assembly 200 are set as... Figure 2 The fence-like shape shown, in other embodiments, includes both the same ring of water spray components 200 and... Figure 2 The fence-like blocks shown also have Figure 7 The shown area is shed-shaped.

[0042] The water pipe 210 of the water spray assembly 200 is horizontally positioned. The shape of the water pipe 210 can be straight or curved; this application does not limit this. See also Figures 2-4 In some embodiments, the lower surface of the water pipe 210 is provided with an outlet 211 for forming a water curtain 500 to block the wind. Based on this, the block can be configured to include multiple water pipes 210 spaced apart from bottom to top, with each water pipe 210 having only one outlet 211. This arrangement makes the overall shape of the water curtain 500 of the block more regular and also facilitates adjusting the water supply to the water pipes 210 over a larger range. It should be understood that when there is only one outlet 211 on the water pipe 210, in order to form the water curtain 500 to block the wind, the length of the outlet 211 should be as equal as possible to the length of the water pipe 210, that is, the length of the outlet 211 is equal to or approximately equal to the length of the water pipe 210 to which it is located. See also Figure 3 and Figure 4 After the water in the water pipe 210 is sprayed out of the outlet 211, it will narrow inward due to surface tension and jet contraction. For the same outlet 211, the lower the flow rate, the smaller the inertial force, and the more obvious the contraction. Figure 4 Figures a, b, and c illustrate different shapes of water curtains 500 formed by the same outlet 211 as the flow rate increases. As can be seen from the figures, when the flow rate is low, the side profile of the water curtain 500 narrows inward more significantly. By arranging multiple water pipes 210 at intervals from bottom to top, and utilizing the interconnection of the wide water curtains 500 in the nearby areas below each water pipe 210, a complete water curtain 500 of equal width from top to bottom can be formed. This makes the overall shape of the water curtain 500 in the block more regular and increases the wind-blocking area.

[0043] Of course, in other embodiments, multiple water outlets 211 on the water pipe 210 can be provided, as long as a water curtain 500 for wind protection can be formed below the water pipe 210. See Figure 2 In some embodiments, the antifreeze system may include multiple rings of water spray assemblies 200 spaced radially along the cooling tower. Blocks corresponding to adjacent rings of water spray assemblies 200 are located in the same sector, and the number of sectors is the same as the number of blocks in a single ring of water spray assemblies 200. For example, two, three, or more rings of water spray assemblies 200 may be arranged around the perimeter of the cooling tower. The spacing between the water spray assemblies 200 in the radial direction of the cooling tower may be equal or unequal. Figure 2 Taking the three-ring water spray assembly 200 as an example, in some embodiments, the distance from the middle ring of water spray assembly 200 to the other two rings of water spray assembly 200 is equal; in other embodiments, the distance from the middle ring of water spray assembly 200 to the other two rings of water spray assembly 200 is unequal. To improve wind resistance, the spacing between adjacent rings of water spray assembly 200 can be set to be relatively smaller at a relatively far distance from the cooling tower; that is, the farther away from the cooling tower, the denser the water spray assembly 200 is arranged radially along the cooling tower.

[0044] See Figure 7 and Figure 8 In some embodiments, the lower surface of the water pipe 210 is provided with a plurality of nozzles 230 for spraying water to form a rain wall for wind protection. Based on this, the block can be configured to include a plurality of water pipes 210 distributed radially at intervals along the cooling tower. It is easy to understand that such an arrangement allows for a thicker rain wall with a stronger wind-blocking effect, and also makes it easier to adjust the raindrop density value of the rain wall over a wider range.

[0045] The antifreeze system's water spray assembly 200 uses water spray to form a target water body to controllably block incoming air in designated areas. In some embodiments, the water source for the water spray assembly 200 can be the circulating water in the water collection tank 120. This arrangement allows for the utilization of the circulating water in the water collection tank 120, which helps reduce water resource input. Of course, in other embodiments, a separate water source can also be provided for the water spray assembly 200, meaning that the water supplied to the water spray assembly 200 and the circulating water for heat dissipation in the cooling tower are two independent water systems.

[0046] See Figure 1 and Figure 6To install the water spray assembly 200, a support assembly 300 can be installed around the cooling tower. The support assembly 300 is mainly used to support the water spray assembly 200. The structure of the support assembly 300 can be varied. For example, a high-strength aluminum alloy modular bracket can be used, which is securely connected to the ground outside the water collection tank 120 via pre-embedded fixing buckles. The top is locked to the tower support 110 via rigid connectors. The spacing of the brackets around the cooling tower can be adjusted according to the diameter of the cooling tower, balancing structural stability and installation flexibility. Alternatively, in other embodiments, the water spray assembly 200 can be directly connected to the tower body 100 and / or the ground, relying on its own piping for support, thus eliminating the need for the support assembly 300.

[0047] See Figure 2 and Figure 8 The water spray assembly 200 includes a water supply control module 220 for regulating water flow. The water supply control module 220 can be a conventional flow control valve, which will not be described in detail here. It should be understood that the water supply control module 220 can accept control commands to achieve automatic adjustment of the water flow.

[0048] In some embodiments, the antifreeze system may include a plurality of first temperature sensors 600, see [link to documentation]. Figure 1 , Figure 2 and Figure 5 The first temperature sensors 600 are distributed on the packing support of the cooling tower, within multiple sectors divided according to the number of blocks in a single ring of water spray assembly 200, and are used to detect the temperature of the lower surface of the packing layer 140. The packing support is a bracket inside the tower body 100 used to support the packing layer 140. Centered on the axis of the tower body 100, the bottom surface of the packing layer 140 can be divided into multiple sectors according to the number of blocks in a single ring of water spray assembly 200. Each sector can be equipped with a corresponding first temperature sensor 600. By fixing the first temperature sensor 600 on the packing support, the temperature of each sector on the lower surface of the packing layer 140 can be monitored in real time. The temperature value detected by the first temperature sensor 600 can be fed back to the control module of the antifreeze system, serving as one of the reference factors for adjusting the water flow rate of the water spray assembly 200. For example, it can be set that when the temperature value fed back by a certain first temperature sensor 600 is not greater than 0°C, the corresponding sector located on the periphery of the cooling tower can be controlled to spray water to form a target water body for wind protection, thereby reducing the air intake of the corresponding sector.

[0049] In some embodiments, the antifreeze system may include multiple second temperature sensors distributed around the periphery of the tower support 110 within multiple sectors divided according to the number of blocks in a single-ring water spray assembly 200, for detecting air temperature. The second temperature sensors, located around the cooling tower, can monitor the ambient temperature corresponding to different blocks in real time. The temperature values ​​detected by the second temperature sensors can be fed back to the control module of the antifreeze system, serving as one of the reference factors for adjusting the water flow rate of the water spray assembly 200. For example, it can be set that when the temperature value fed back by a certain second temperature sensor is not greater than 0°C, the corresponding sector located around the cooling tower will be controlled to spray water to form a target water body for windbreak, thereby reducing the air intake of the corresponding sector.

[0050] In some embodiments, the antifreeze system may include multiple wind speed sensors, which are distributed around the periphery of the tower support 110 within multiple sectors divided according to the number of blocks in a single-ring water spray assembly 200, for detecting the airflow velocity directed towards the air inlet. The wind speed sensors, located around the cooling tower, can monitor the on-site wind speed corresponding to different blocks in real time. The wind speed values ​​detected by the sensors can be fed back to the control module of the antifreeze system, serving as one of the reference factors for adjusting the water flow rate of the water spray assembly 200. For example, it can be set that during the process of spraying water in a certain block to form a target water body for windbreak, when the wind speed value fed back by the wind speed sensor in the corresponding sector increases, the water flow rate in that block is increased.

[0051] See Figure 2 and Figure 7 The antifreeze system may include multiple monitoring modules 400, which are distributed around the periphery of the tower support 110 within multiple sectors divided according to the number of blocks of the single-ring water spray assembly 200. Each monitoring module 400 may include the aforementioned second temperature sensor and / or wind speed sensor. In embodiments where the monitoring module 400 includes both a second temperature sensor and a wind speed sensor, the second temperature sensor and wind speed sensor within the same sector are arranged in the same location. Of course, in other embodiments, the second temperature sensor and wind speed sensor within the same sector may be arranged in different locations.

[0052] By setting up sensors, the control module of the antifreeze system can automatically identify the operating condition type based on the data collected by the sensors, thereby outputting precise flow control commands. The frequency at which the control module collects data from the sensors can be set as needed; for example, it can be set to collect real-time data once per minute. It should be noted that one or more sensors of the same type (i.e., detecting the same physical quantity) within the same sector can be set up, and this application does not limit this.

[0053] See Figures 1-8This application also provides an antifreeze method for wet cooling towers, which is implemented in the antifreeze system for wet cooling towers disclosed in the above embodiments. The antifreeze method includes: determining the block corresponding to the sector where the air inlet of the cooling tower needs to be blocked; supplying water to the determined block, and using the water outlet of water pipe 210 to form a target water body for blocking the wind. That is, firstly, the block that needs to be activated is located according to the antifreeze requirements of the current operating conditions, and then water is supplied to the located block to form a target water body for blocking the wind at that block.

[0054] There are several ways to determine the sector where the air inlet requiring wind protection is located. For example, it can be determined by a first temperature sensor 600 arranged within the sector, or by a second temperature sensor arranged within the sector, or by using both the first and second temperature sensors together. In other words, when determining the sector where the air inlet requiring wind protection is located, the determination method can be based on a single reference factor (such as the temperature of the lower surface of the filler layer 140, the ambient temperature of the block, etc.) or multiple reference factors.

[0055] In some embodiments, the antifreeze method may include adjusting the water supply used to form the target water body. See also Figure 2 and Figure 7 Depending on the type of target water body, the adjustment range of the water supply can vary. In the embodiment where the target water body is a water curtain 500, the initial water supply to the designated area is set to 110% of the preset standard flow rate. During the adjustment of the water supply to the designated area, the water supply varies within the range of 130% to 180% of the preset standard flow rate. It should be noted that the preset standard flow rate needs to be set according to the actual arrangement of the cooling tower and the water spray assembly 200, and can be obtained through experiments in the initial stage of actual operation of the cooling tower. The adjustment method in the above embodiment does not limit the specific value of the preset standard flow rate; it mainly controls the relationship between the range of water supply variation during the adjustment process and the initial water supply.

[0056] In the embodiment where the target water body is a rain wall, the initial water supply to the determined area corresponds to a raindrop density value of a preset standard density value for the rain wall. During the adjustment of the water supply to the determined area, the raindrop density value of the rain wall varies within the range of 75% to 120% of the preset standard density value. It should be noted that the preset standard density value needs to be set according to the actual arrangement of the cooling tower and the water spray assembly 200, and can be obtained through experiments in the initial stage of actual operation of the cooling tower. The adjustment method in the above embodiment does not limit the specific value of the preset standard density value; it mainly controls the relationship between the range of raindrop density variation of the rain wall and the initial raindrop density during the adjustment process.

[0057] In some embodiments, the antifreeze method may include fine-tuning the water supply of the water spray assembly 200 at predetermined intervals (e.g., 30 minutes, 20 minutes, etc.). For example, in an embodiment where the target water body is a water curtain 500, the water supply of the block may be adjusted every 30 minutes, with each adjustment being 5% of a preset standard flow rate value.

[0058] See Figure 2 In an embodiment where multiple rings of water spray components 200 are installed around the cooling tower, the antifreeze method may include activating a corresponding number of blocks located in the same sector based on a determined freezing risk level. Figure 2 Taking the example of a three-ring water spray assembly 200, the freezing risk can be set to three levels: low, medium, and high. When the freezing risk is determined to be low, only the corresponding block of the innermost ring of water spray assembly 200 can be activated. When the freezing risk is determined to be medium, the corresponding blocks of the innermost and middle rings of water spray assembly 200 can be activated. When the freezing risk is determined to be high, the corresponding blocks of the innermost, middle, and outermost rings of water spray assembly 200 can be activated. It is easy to understand that within the same sector, the more blocks are activated, the greater the wind resistance. The freezing risk level can be determined based on data collected by sensors, and the specific determination conditions can be flexibly set as needed; this application does not limit this. For example, it can be determined by a first temperature sensor 600 arranged within the sector, or by a second temperature sensor arranged within the sector, or by both the first and second temperature sensors arranged within the sector. In other words, when determining the freezing risk level of a sector, the determination method can be based on a single reference factor (such as the temperature of the lower surface of the filler layer 140, the ambient temperature of the block, etc.) or multiple reference factors.

[0059] The antifreeze method for wet cooling towers of this application can effectively prevent freezing on the lower surface of the packing layer 140 of the cooling tower. In some embodiments, maintaining the temperature of the lower surface of the packing layer 140 above 0.5°C can be one of the objectives of the antifreeze method.

[0060] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0061] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An antifreeze system for a wet cooling tower, wherein the tower support of the cooling tower has an air inlet, characterized in that, The antifreeze system includes at least one ring of water spray components arranged around the tower support. The water spray components include multiple blocks distributed along the circumference of the cooling tower. Each block includes a horizontally placed water pipe. The lower surface of the water pipe is provided with a water outlet structure or water outlet component. The water flow rate of the water pipe can be independently controlled by the blocks at different locations to achieve the formation of a target water body for wind protection in a zoned and controllable manner.

2. The antifreeze system according to claim 1, comprising at least one of the following: Multiple first temperature sensors are distributed on the packing support of the cooling tower in multiple sectors divided according to the number of blocks of a single ring of the water spray assembly, for detecting the temperature at the lower surface of the packing layer. Multiple second temperature sensors are distributed around the periphery of the tower support, within multiple sectors divided according to the number of blocks in a single ring of the water spray assembly, for detecting air temperature; Multiple wind speed sensors are distributed around the outer perimeter of the tower support, within multiple sectors divided according to the number of blocks in a single ring of the water spray assembly, to detect the airflow velocity blowing towards the air inlet.

3. The antifreeze system according to claim 1 or 2, wherein the lower surface of the water pipe is provided with a water outlet for forming a water curtain to block the wind.

4. The antifreeze system according to claim 3, wherein the block comprises a plurality of water pipes spaced apart from bottom to top, and each water pipe has one water outlet.

5. The antifreeze system according to claim 4, comprising multiple rings of the water spray assembly distributed radially at intervals along the cooling tower, wherein the blocks corresponding to adjacent rings of the water spray assembly are located in the same sector, and the number of sectors is the same as the number of blocks in a single ring of the water spray assembly.

6. The antifreeze system according to claim 1 or 2, wherein the lower surface of the water pipe is provided with a plurality of nozzles for spraying water to form a rain wall for wind protection.

7. The antifreeze system according to claim 6, wherein the block comprises a plurality of water pipes spaced radially along the cooling tower.

8. A method for preventing freezing in wet cooling towers, characterized in that, The antifreeze system for wet cooling towers as described in any one of claims 1 to 7, wherein the antifreeze method comprises: Determine the block corresponding to the sector where the air inlet of the cooling tower that requires wind protection is located; Water is supplied to the designated area, and the water outlet from the water pipe is used to form a target water body for windbreak.

9. The antifreeze method according to claim 8, wherein the target water body is a water curtain, the initial water supply to the determined block is set to 110% of the preset standard flow rate, and during the process of adjusting the water supply to the determined block, the water supply varies within the range of 130% to 180% of the preset standard flow rate.

10. The antifreeze method according to claim 8, wherein the target water body is a rain wall, the initial water supply to the determined block corresponds to the raindrop density value of the rain wall being a preset standard density value, and during the process of adjusting the water supply to the determined block, the raindrop density value of the rain wall is varied within the range of 75% to 120% of the preset standard density value.

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