Cooling tower for improving thermal performance of entire tower

Abstract

The present application relates to cooling tower related technical field, specifically for a kind of cooling tower of improving the thermal performance of whole tower, including tower body, the middle part of tower body is equipped with filler and bottom is equipped with air inlet, the filler is equipped with curved heat exchange box between air inlet, curved heat exchange box is internally installed with the water distribution boss and auxiliary water distributor of relative arrangement, auxiliary water distributor includes water distribution tank fixed in curved heat exchange box interior, water distribution tank top opening and the opening is slidably installed with water collection carrier block, and water distribution tank side wall is equipped with several spray holes, water collection carrier block is self-driven and used to press into the water in water distribution tank interior from spray hole and spray it out;The present application utilizes curved heat exchange box and passes into the cold air into filler edge position, makes the hot water falling into the edge of filler and cold air heat exchange, improves the thermal performance of filler edge, and utilizes the up-and-down movement of self-driven water collection carrier block and makes the water in water distribution tank spray from spray hole, so that it is broken and forms small droplet to improve heat exchange efficiency.

Description

Technical Field

[0001] This invention relates to the technical field of cooling towers, specifically to a cooling tower that improves the overall thermal performance of the tower. Background Technology

[0002] A cooling tower is a device that cools water by utilizing the contact between air and water. It uses air as a circulating coolant, absorbing heat from a system and releasing it into the atmosphere, thereby lowering the temperature inside the tower and producing recyclable cooling water. These devices are commonly used in large factories, power plants, and daily life. During operation, the packing material in the central area has a higher airflow rate and therefore better thermal performance compared to the packing material at the edges. The packing material near the tower edge typically has a lower airflow rate, resulting in poorer thermal performance. This difference is particularly noticeable in larger cooling towers and at high fan speeds. Summary of the Invention

[0003] The technical problem to be solved by the present invention is: to solve the problem that the thermal performance of the packing near the edge of the tower wall in the prior art is deteriorated due to the low ventilation flow rate. The present invention provides a cooling tower that improves the thermal performance of the entire tower.

[0004] The technical solution adopted by this invention to solve its technical problem is: a cooling tower for improving the overall thermal performance of the tower, comprising a tower body, wherein the middle part of the tower body is provided with packing and an air inlet is opened at the bottom, and a nozzle is provided above the packing. Hot water is sprayed out from the nozzle, and cold air enters from the air inlet, and the hot water and cold air exchange heat in the packing. Several curved heat exchange boxes are provided between the packing and the air inlet, and one end of the curved heat exchange box is directly opposite the air inlet, and the other end is directly opposite the edge of the packing.

[0005] The curved heat exchange box has an arc-shaped flow channel inside. The air entering the edge of the packing falls into the curved heat exchange box and exchanges heat with the cold air entering from the air inlet. The arc-shaped flow channel can effectively increase the gas-liquid contact time in a limited space.

[0006] The curved heat exchanger box is equipped with a water distribution boss and an auxiliary water distributor installed inside. The auxiliary water distributor includes a water distribution tank fixed inside the curved heat exchanger box. The top of the water distribution tank is open and a water collection block is slidably installed in the opening. Several spray holes are opened through the side wall of the water distribution tank. The water collection block is self-driven and is used to press down the water entering the water distribution tank so that it is sprayed out from the spray holes. When the water collecting block moves up and down, the volume of the water distribution tank changes. Since water is a fluid that is difficult to compress, the total amount of water in a certain space is fixed. When the water collecting block moves downward, the water distribution tank is compressed, and the water will be ejected from the nozzle in a very short time. At this time, the water flowing out of the nozzle will overcome the surface tension and break into tiny droplets. The water ejected from the nozzle will also impact the curved inner wall of the heat exchanger, and undergo multiple impacts in the arc-shaped flow channel. Such impacts will further break the large droplets into smaller droplets. The smaller droplets can not only increase the heat exchange area and improve the heat exchange efficiency, but also reduce the air flow resistance when the air flows upward and exchanges heat with the droplets. That is, the smaller droplets have less resistance to the air, thus ensuring the air flow and further improving the heat exchange efficiency.

[0007] The above technical solution utilizes a curved heat exchange box to introduce cold air into the edge of the packing material, allowing the hot water falling into the edge of the packing material to exchange heat with the cold air, thereby improving the thermal performance of the packing material edge. Furthermore, the up-and-down movement of the self-driven water collecting block causes the water in the distribution tank to be sprayed out from the nozzle, breaking it into fine droplets to improve the heat exchange efficiency.

[0008] Furthermore, a baffle plate is fixed to the top of the water collecting block, and the top of the baffle plate is bent downward to form a blocking part. A water-separating plate is fixed above the water distribution tank. The water-separating plate and the baffle plate are respectively located on both sides of the water collecting block, and a groove is formed between the water-separating plate, the water collecting block and the baffle plate. A spring is provided between the water collecting block and the bottom wall of the water distribution tank. The top of the water distribution tank is a downwardly inclined connecting plate. Multiple through holes are opened on the inclined connecting plate. A one-way valve is installed inside each through hole to allow water to enter the water distribution tank but prevent water from flowing out of the water distribution tank. The height of the one-way valve is slightly lower than the height of the inclined connecting plate at the corresponding position, which is conducive to the water flowing into the one-way valve and thus reaching the inside of the water distribution tank.

[0009] Water falling above the water distribution boss will, due to the presence of the water distribution boss, fall onto the water collection block and the inclined connecting plate. Water falling onto the inclined connecting plate will flow downwards along the inclined plate and enter the water distribution tank through the one-way valve. Water falling above the auxiliary water distributor will, due to the presence of the baffle plate, also mostly fall onto the inclined connecting plate and enter the water distribution tank. When a significant amount of water falls onto the water collection block, the weight of the water on the block, along with the weight of the block and the baffle plate, will compress the spring downwards. This compresses the overall fluid space within the auxiliary water distribution tank. Since the one-way valve is closed in the opposite direction, water will rapidly spray out from the nozzle within a very short time. As the water collection block compresses the spring, it moves down below the baffle plate, forming an opening with the bottom of the baffle plate. Water from the water collection block will then flow through this opening onto the inclined connecting plate. Furthermore, as the water collection block moves downwards and compresses the spring, the downward movement of the block's height will simultaneously lower the height of the baffle plate connected to it. As the baffle plate lowers, it will block some of the water splashing from the distribution boss, reducing the flow of water splashing into the water collection block from the distribution boss. Additionally, as the spring's deformation under compression increases, its upward elastic force will also increase, ultimately causing the water collection block to move upwards. When the water collection block returns to its original position, the water baffle also moves upward, so the water splashed from the water distribution boss can fall back onto the water collection block, and this water-driven up-and-down movement can be repeated.

[0010] Furthermore, several bent plate assemblies are fixed above the packing material, and the bottom of the bent plate assembly is directly opposite the edge of the packing material. The bent plate assembly includes two bent plates arranged opposite each other, each bent plate having a curved part protruding towards the other, and the curved parts on the two bent plates are staggered. A hollow connecting plate is fixed to the top of the two bent plates, and arc-shaped guide parts protrude from both sides of the connecting plate.

[0011] When water sprayed from the nozzle flows into the bent plate assembly, the water on the connecting plate at the top slides down onto the bent plate below due to the arc-shaped guide section. Because the bends on the two bent plates are staggered, the water sprayed from the nozzle continuously impacts the two plates upon entering this area. During this continuous impact, large droplets are broken down into smaller droplets. Furthermore, the continuous impact reduces the kinetic energy of the water, resulting in a longer gas-liquid heat exchange time and a larger gas-liquid contact area in this area, thus improving heat exchange performance. In addition, the curved design of the double bent plates allows the outflowing droplets to flow into the lower packing material at a certain angle after exiting this area. These low-velocity droplets with smaller radii also experience a longer gas-liquid heat exchange time and a larger gas-liquid contact area within the packing material. The droplets entering the packing material at a certain angle also continuously impact the packing wall, further breaking up the droplets and prolonging the gas-liquid contact time.

[0012] Furthermore, the side wall of the water distribution tank where the nozzle is located has an arc-shaped structure, so that the water sprayed from the nozzle will hit the curved heat exchanger at a certain angle. This angled droplet increases the number of impacts with the arc-shaped flow channel, thereby breaking it into smaller droplets.

[0013] Furthermore, the curved heat exchange box has several auxiliary ventilation holes located below the auxiliary water distributor, and the auxiliary ventilation holes are located on the inner side wall of the curved heat exchange box. The curved heat exchange box includes, from top to bottom, a longitudinal installation section for installing the water distribution boss and the auxiliary water distributor, a transverse U-shaped section, and an arc-shaped connecting section connecting the two. The auxiliary ventilation holes are located in the upper part of the arc-shaped connecting section and the transverse U-shaped section.

[0014] When air exchanges heat in the curved heat exchanger, its temperature increases. Because hot air is less dense than cold air, it tends to rise. Furthermore, the continuous operation of the fan creates negative pressure by expelling air from the cooling tower. Therefore, the auxiliary ventilation holes on the curved heat exchanger allow hot air to flow out promptly. Simultaneously, the relative negative pressure within the curved heat exchanger draws in cold air, further improving its ventilation performance. The auxiliary ventilation holes are located on the upper part of the arc-shaped connecting section and the transverse U-shaped section, and on the inner wall of the curved heat exchanger. Here, as water flows downwards from the curved heat exchanger, its inertia causes it to impact the outer wall of the curved heat exchanger. Therefore, the amount of water flowing out through the auxiliary ventilation holes is very small, and even the water that does flow out undergoes a certain temperature drop after traveling a considerable heat exchange distance.

[0015] Furthermore, several auxiliary protrusions are provided at the large curvature position inside the curved heat exchange box. When water flows over the auxiliary protrusions, due to the inertia of the water and the combined effect of the auxiliary protrusions, the water near the wall of the curved heat exchange box will splash up. The splashed water will increase the gas-liquid contact area, thereby improving the heat exchange efficiency.

[0016] Furthermore, several curved heat exchange boxes located on the same side are spaced apart and connected by tie rods. The tie rods can drive the curved heat exchange boxes to make linear reciprocating motion, thereby connecting the curved heat exchange boxes with different positions of the air inlet and the edge of the packing, effectively improving the uniformity of heat exchange.

[0017] The beneficial effects of this invention are: This invention utilizes a curved heat exchange box to introduce cold air into the edge of the packing material, allowing the hot water falling into the edge of the packing material to exchange heat with the cold air, thereby improving the thermal performance of the packing material edge. Furthermore, the up-and-down movement of the self-driven water collecting block causes the water in the water distribution tank to be sprayed out from the nozzle, breaking it into fine droplets to improve the heat exchange efficiency. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is an external view of the present invention;

[0020] Figure 2 This is a schematic diagram of the internal structure of the present invention;

[0021] Figure 3 This is an external view of the curved heat exchanger.

[0022] Figure 4 This is a schematic diagram of the internal structure of a curved heat exchanger.

[0023] Figure 5 This is a schematic diagram of the internal structure of the auxiliary water distributor;

[0024] Figure 6 This is a diagram of the auxiliary water distributor;

[0025] Figure 7 This is a structural schematic diagram of a bent plate assembly;

[0026] In the picture:

[0027] 1. Tower body; 101. Air inlet; 2. Packing; 3. Nozzle; 4. Bending heat exchange box; 401. Auxiliary ventilation hole; 402. Auxiliary boss; 5. Water distribution boss; 6. Auxiliary water distributor; 601. Water distribution tank; 6011. Spray hole; 6012. Inclined connecting plate; 6013. Guide plate; 602. Water collection block; 603. Water baffle; 6031. Blocking part; 604. Water baffle; 605. Spring; 606. Through hole; 7. Bending plate assembly; 701. Bending plate; 702. Connecting plate; 7021. Guide part; 8. Tie rod. Detailed Implementation

[0028] The invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention in a schematic manner. Therefore, they only show the components relevant to the invention, and the orientations and references (e.g., up, down, left, right, etc.) are only used to aid in the description of the features in the drawings. Therefore, the following specific embodiments are not intended to be limiting, and the scope of the claimed subject matter is defined solely by the appended claims and their equivalents.

[0029] Example 1:

[0030] like Figures 1-7 As shown, the present invention is a cooling tower that improves the overall thermal performance of the tower, including a tower body 1 with a rectangular structure. The middle part of the tower body 1 is provided with packing 2 and air inlets 101 are opened on both sides of the bottom. Louvers are installed on the air inlets 101. A nozzle 3 is provided above the packing 2. Hot water is sprayed out from the nozzle 3 and cold air enters from the air inlets 101. The hot water and cold air exchange heat in the packing 2.

[0031] Four sets of bent plate assemblies 7 are fixed above the packing 2. The bottom of the four sets of bent plate assemblies 7 is directly opposite and connected to the four edges of the square packing 2. Each bent plate assembly 7 includes two bent plates 701 arranged opposite each other. Each bent plate 701 has a bent portion protruding towards the other, and the bent portions on the two bent plates 701 are staggered. A hollow connecting plate 702 is fixed to the top of the two bent plates 701. Arc-shaped guide portions 7021 protrude from both sides of the connecting plate 702.

[0032] When water sprayed from nozzle 3 flows into the bent plate assembly 7, the water on the connecting plate 702 at its top has an arc-shaped guide portion 7021, causing the water to slide onto the bent plate 701 below. Because the bends on the two bent plates 701 are staggered, the water sprayed from nozzle 3 will continuously impact the two bent plates 701 after entering this area. During this continuous impact, large droplets are constantly broken into smaller droplets. Furthermore, the continuous impact reduces the kinetic energy of the water, resulting in a longer gas-liquid heat exchange time and a larger gas-liquid contact area in this region, thereby improving heat exchange performance. Furthermore, due to the bending design of the double-bend plate 701, the outflowing droplets can also flow into the lower packing 2 at a certain angle after flowing out of this area. These low-speed droplets with small droplet radii will have a longer gas-liquid heat exchange time and a larger gas-liquid contact area in the packing 2. The droplets entering the packing 2 at a certain angle will also continuously hit the wall of the packing 2, which will further disperse the droplets and prolong the gas-liquid contact time.

[0033] Several curved heat exchange boxes 4 are provided between the packing 2 and the air inlet 101, with one end of each curved heat exchange box 4 facing the air inlet 101 and the other end facing the edge of the packing 2. An arc-shaped flow channel is formed inside each curved heat exchange box 4. Water entering from the edge of the packing 2 falls into the curved heat exchange box 4 and exchanges heat with the cold air entering from the air inlet 101. The arc-shaped flow channel effectively increases the gas-liquid contact time within a limited space. Several curved heat exchange boxes 4 located on the same side are spaced apart and connected by tie rods 8. The tie rods 8 can drive the curved heat exchange boxes 4 to perform linear reciprocating motion, thereby connecting the curved heat exchange boxes 4 with different positions of the air inlet 101 and the edge of the packing 2, effectively improving the uniformity of heat exchange.

[0034] Inside the curved heat exchanger 4, there are water distribution bosses 5 and auxiliary water distributors 6 installed opposite to each other. The auxiliary water distributor 6 includes a water distribution tank 601 fixed inside the curved heat exchanger 4. The top of the water distribution tank 601 is open and a water collection block 602 is slidably installed in the opening. Inside the water distribution tank 601, there is a guide plate 6013 for guiding the movement of the water collection block 602. The guide plate 6013 divides the inner cavity of the water distribution tank 601 into two interconnected small cavities. The arc-shaped sidewall of the water distribution tank 601 is provided with several spray holes 6011. The water collection block 602 is self-driven and is used to press down the water entering the water distribution tank 601 so that it is sprayed out from the spray holes 6011.

[0035] A baffle plate 603 is fixed to the top of the water collecting block 602. The top of the baffle plate 603 is bent downward to form a blocking part 6031. A water baffle plate 604 is fixed above the water distribution tank 601 and is fixed to the inner wall of the curved heat exchange box 4. The water baffle plate 604 and the baffle plate 603 are located on both sides of the water collecting block 602, and a groove is formed between the water baffle plate 604, the water collecting block 602 and the baffle plate 603. When the water collecting block 602 is in the initial position, the closed groove formed between the water baffle plate 604, the water collecting block 602 and the baffle plate 603 can be used to collect water falling from the edge of the packing 2. When the water collecting block 602 moves down to below the water baffle plate 604, an opening is formed in the groove, and water can flow out from the opening. A spring 605 is provided between the water collection block 602 and the bottom wall of the water distribution tank 601. The top of the water distribution tank 601 is an inclined connecting plate 6012 that slopes downward. Multiple through holes 606 are provided on the inclined connecting plate 6012. Each through hole 606 is equipped with a one-way valve that allows water to enter the water distribution tank 601 but prevents water from flowing out of the water distribution tank 601. The height of the one-way valve is slightly lower than the height of the inclined connecting plate 6012 at the corresponding position.

[0036] Water falling above the water distribution boss 5 will, due to the presence of the water distribution boss 5, fall onto the water collection block 602 and the inclined connecting plate 6012. Water falling onto the inclined connecting plate 6012 will flow downward along the inclined connecting plate 6012 and enter the water distribution tank 601 through the one-way valve. Water falling above the auxiliary water distributor 6 will, due to the presence of the blocking part 6031 on the baffle plate 603, also mostly fall onto the inclined connecting plate 6012 and enter the water distribution tank 601. When a large amount of water falls onto the water collecting block 602, the weight of the water on the water collecting block 602, along with the weight of the water collecting block 602 and the baffle plate 603, will compress the spring 605 downwards. Since water is a difficult-to-compress fluid, the total amount of water in a given space is fixed. When the water collecting block 602 moves downwards, compressing the inner cavity of the water distribution tank 601, and because the one-way valve is closed in the opposite direction, water will rapidly spray out from the nozzle 6011 in a very short time. At this moment, the water flowing out of the nozzle 6011 will overcome surface tension and break into tiny droplets, and from the nozzle 6011... The water sprayed from nozzle 6011 impacts the inner wall of the curved heat exchange box 4. Since the side wall where nozzle 6011 is located has an arc-shaped structure, the water sprayed from nozzle 6011 will impact the curved heat exchange box 4 at a certain angle. These angled droplets will impact the curved flow channel multiple times. Such impacts will break the large droplets into smaller droplets. The smaller droplets can not only increase the heat exchange area and improve the heat exchange efficiency, but also reduce the air flow resistance when the air flows upward and exchanges heat with the droplets. That is, the smaller droplets will have less resistance to the air, thereby ensuring the air flow and further improving the heat exchange efficiency. When the water collecting block 602 presses down on the spring 605, the water collecting block 602 moves down below the water-blocking plate 604, allowing water on the water collecting block 602 to flow from the opening onto the inclined connecting plate 6012. Furthermore, as the water collecting block 602 moves downward and presses down on the spring 605, the downward movement of the water collecting block 602 simultaneously causes the water-blocking plate 603 connected to it to also move downward. When the water-blocking plate 603 lowers, it blocks some of the water splashing from the water distribution boss 5, reducing the water flow into the water collecting block 602. Moreover, as the compression deformation of the spring 605 increases, its upward elastic force also increases, ultimately causing the position of the water collecting block 602 to move upward. When the water collection block 602 returns to its original position, the water baffle 603 also moves upward, so the water splashed from the water distribution boss 5 can fall back onto the water collection block 602, and this water-driven up-and-down movement can be repeated.

[0037] The curved heat exchange box 4 is provided with a number of auxiliary ventilation holes 401 located below the auxiliary water distributor 6. The auxiliary ventilation holes 401 are located on the inner side wall of the curved heat exchange box 4. The curved heat exchange box 4 includes, from top to bottom, a longitudinal installation section for installing the water distribution boss 5 and the auxiliary water distributor 6, a transverse U-shaped section, and an arc-shaped connecting section connecting the two. The auxiliary ventilation holes 401 are located in the upper part of the arc-shaped connecting section and the transverse U-shaped section.

[0038] When air exchanges heat in the curved heat exchange box 4, the air temperature will increase. Since hot air has a lower density than cold air, it tends to rise. Furthermore, the operation of the fan continuously discharges air from the cooling tower, creating a negative pressure. Therefore, the presence of the auxiliary ventilation holes 401 on the curved heat exchange box 4 allows the hot air inside to flow out of the curved heat exchange box 4 in a timely manner. As the hot air continuously flows out of the curved heat exchange box 4, the relative negative pressure in the curved heat exchange box 4 causes cold air from the outside to continuously flow into the curved heat exchange box 4, thereby improving the ventilation performance of the curved heat exchange box 4. The auxiliary ventilation hole 401 is located on the upper part of the arc-shaped connecting section and the transverse U-shaped section, and the auxiliary ventilation hole 401 is located on the inner wall of the curved heat exchange box 4. Because when the water flows downward from the curved heat exchange box 4, due to the inertial motion of the water, the water tends to impact the outer wall of the curved heat exchange box 4. Therefore, the amount of water flowing out from the auxiliary ventilation hole 401 is very small. Even if the water flows out, it has traveled a certain heat exchange distance and has a certain degree of temperature drop.

[0039] Several auxiliary protrusions 402 are provided at the large curvature position inside the curved heat exchange box 4. When water flows over the auxiliary protrusions 402, due to the inertia of the water and the combined effect of the auxiliary protrusions 402, the water near the wall of the curved heat exchange box 4 will splash up. The splashed water will increase the gas-liquid contact area, thereby improving the heat exchange efficiency.

[0040] The above description, based on the preferred embodiments of the present invention, provides inspiration. Those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification but must be determined according to the claims.

Claims

1. A cooling tower that improves the overall thermal performance, characterized in that: The tower body (1) includes a packing (2) in the middle part and an air inlet (101) at the bottom. Several curved heat exchange boxes (4) are provided between the packing (2) and the air inlet (101). One end of the curved heat exchange box (4) is directly opposite the air inlet (101), and the other end is directly opposite the edge of the packing (2). The curved heat exchange box (4) has an arc-shaped flow channel inside, and the curved heat exchange box (4) is equipped with a water distribution boss (5) and an auxiliary water distributor (6) installed inside. The auxiliary water distributor (6) includes a water distribution tank (601) fixed to the inner wall of the curved heat exchange box (4). The top of the water distribution tank (601) is open and a water collection block (602) is slidably installed in the opening. The side wall of the water distribution tank (601) is provided with a plurality of spray holes (6011). The water collection block (602) is self-driven and is used to press down the water entering the water distribution tank (601) so that it is sprayed out from the spray holes (6011). A baffle plate (603) is fixed on the top of the water collection block (602). The top of the baffle plate (603) is bent downward to form a blocking part (6031). A water-separating plate (604) is fixed above the water distribution tank (601). The water-separating plate (604) and the baffle plate (603) are located on both sides of the water collection block (602). A groove is formed between the water-separating plate (604), the water collection block (602) and the baffle plate (603). A spring (605) is provided between the water collection block (602) and the bottom wall of the water distribution tank (601). The top of the water distribution tank (601) is an inclined connecting plate (6012). Multiple through holes (606) are opened on the inclined connecting plate (6012). A one-way valve is installed inside each through hole (606).

2. A cooling tower for improving the overall thermal performance according to claim 1, characterized in that: Several bent plate assemblies (7) are fixed above the packing (2), and the bottom of the bent plate assembly (7) is directly opposite the edge of the packing (2). The bent plate assembly (7) includes two bent plates (701) arranged opposite each other. Each bent plate (701) has a bent portion protruding towards the other, and the bent portions on the two bent plates (701) are staggered. A hollow connecting plate (702) is fixed on the top of the two bent plates (701), and arc-shaped guide portions (7021) protrude from both sides of the connecting plate (702).

3. A cooling tower for improving the overall thermal performance as described in claim 1, characterized in that: The side wall of the water distribution tank (601) where the nozzle (6011) is located has an arc-shaped structure.

4. A cooling tower for improving the overall thermal performance according to claim 1, characterized in that: The curved heat exchange box (4) is provided with several auxiliary ventilation holes (401) located below the auxiliary water distributor (6).

5. A cooling tower for improving the overall thermal performance according to claim 1, characterized in that: Several auxiliary protrusions (402) are provided at the large curvature position inside the curved heat exchange box (4).

6. A cooling tower for improving the overall thermal performance according to claim 1, characterized in that: Several curved heat exchange boxes (4) located on the same side are spaced apart and connected by a tie rod (8), which can drive the curved heat exchange boxes (4) to make linear reciprocating motion.

Images