Heat exchange tube, heat exchange module, cooling tower and cooling system

Abstract

A heat exchange tube, a heat exchange module, a cooling tower and a cooling system, relating to the technical field of industrial cooling towers. The heat exchange tube comprises a tube body, wherein radially outward-extending fins are provided on the outer circumference of the tube body, the fins being arranged along the length of the heat exchange tube; the spacing between adjacent fins is greater than or equal to 4.5 mm. The heat exchange module comprises the heat exchange tube as described above; the cooling tower comprises the heat exchange module as described above. The cooling system comprises the cooling tower as described above.

Description

Heat exchange pipe, heat exchange module, cooling tower and cooling system TECHNICAL FIELD

[0001] The present application relates to the technical field of industrial cooling towers, in particular to a heat exchange pipe, a heat exchange module comprising the heat exchange pipe, a cooling tower comprising the heat exchange module and a cooling system. BACKGROUND

[0002] In some prior art cooling towers, an air mixing section, a water collecting and mist capturing section, a spraying section, a heat exchange section, an air inlet section and a water collecting section are arranged in the cooling tower from top to bottom. An air exhaust section is arranged at the upper part of the tower body, and the air exhaust section comprises a wind cylinder and a fan arranged in the wind cylinder. Water is sprayed from the spraying section to the heat exchange section, and the heat exchange section is provided with a plurality of groups of filler modules formed by stacking a plurality of filler sheets to form a stacked flow path. The sprayed water flows through each flow path of the filler modules from top to bottom. On the other hand, air is sucked into the cooling tower from the air inlet section at the lower part of the cooling tower, and flows through each flow path of the filler modules from bottom to top, and exchanges heat with the sprayed hot water, thereby cooling the hot water.

[0003] In the above process of cooling the hot water, the hot water exchanges heat with the air and evaporates, and the air after heat exchange is saturated wet air, which carries water into the air, causing waste of water resources. Especially in winter in high latitude areas, the mist formed by the exhaust air of the cooling tower is particularly dense, and even forms rain and snow, which further freezes on the equipment and ground, causing frost damage and adversely affecting the environment. SUMMARY

[0004] The present application provides a heat exchange pipe, a heat exchange module, a cooling tower and a cooling system to solve the above technical problems.

[0005] To achieve the above technical purpose, one aspect of an embodiment of the present application provides a heat exchange pipe having a pipe body.

[0006] The outer circumference of the pipe body is provided with fins extending radially outward, and the fins are arranged in an array along the extension direction of the heat exchange pipe or are arranged in a spiral shape.

[0007] The distance between adjacent fins is greater than or equal to 4.5 mm, and a gap allowing water droplets to pass is formed between the adjacent fins.

[0008] In some embodiments, the distance between two adjacent fins is greater than or equal to 6 mm.

[0009] In some embodiments, the root of the fin and the pipe body have a guide portion formed in an arc shape or a chamfered shape.

[0010] In some embodiments, two of the guide portions are connected together in the gap between two adjacent fins, and an arc-shaped bottom is formed at the connection and surrounds the tube.

[0011] In some embodiments, the filler portion is formed by laminating filler sheets, and the filler sheets are provided with through holes, and the through holes are laminated to form accommodating cavities in the filler portion.

[0012] The heat exchange tube is arranged in the accommodating cavity, and the heat exchange tube has a tube body; the outer periphery of the tube body is provided with fins extending radially outward, and the fins are arranged in an array along the extension direction of the heat exchange tube or are arranged in a spiral shape; the distance between adjacent fins is greater than or equal to 4.5 mm, and a gap allowing water droplets to pass through is formed between the adjacent fins.

[0013] In some embodiments, the guide portion is formed in an arc shape or a chamfer shape between the root of the fin and the tube body.

[0014] Two of the guide portions are connected together in the gap between two adjacent fins, and an arc-shaped bottom is formed at the connection and surrounds the tube.

[0015] In some embodiments, the heat exchange tube and the accommodating cavity are both multiple.

[0016] The heat exchange tube penetrates the accommodating cavity.

[0017] One side of the laminated direction of the filler sheet of the filler portion is provided with a first box body, and the other side of the laminated direction is provided with a second box body; the heat exchange tube has oppositely arranged first and second ends; the first end of the heat exchange tube communicates with the first box body, and the second end communicates with the second box body.

[0018] In some embodiments, a spacer is arranged in the first box body, thereby forming a first cavity and a second cavity on both sides of the spacer, and part of the first end of the heat exchange tube communicates with the first cavity, and the rest of the first end of the heat exchange tube communicates with the second cavity.

[0019] In some embodiments, the heat exchange tube is bent into a U shape, one of the two branches of the U shape penetrates one of the accommodating cavities, and the other branch of the U shape penetrates the other accommodating cavity.

[0020] In some embodiments, the heat exchange tube is bent more than twice and penetrates at least one accommodating cavity.

[0021] Another aspect of the embodiment of the present application provides a heat exchange module, which has:

[0022] The heat exchange tube has a tube body, and a plurality of fins extending radially outward are arranged on the outer periphery of the tube body along the length direction of the heat exchange tube; the interval between two adjacent fins is greater than or equal to 4.5 mm, and a gap allowing water droplets to pass through is formed between the two adjacent fins;

[0023] The first box body is connected with the first end of the heat exchange tube, and the second box body is connected with the second end of the heat exchange tube.

[0024] In some embodiments, a partition is arranged in the first box body, thereby forming a first cavity and a second cavity on both sides of the partition, and a part of the first end of the heat exchange tube is communicated with the first cavity, and the rest of the first end of the heat exchange tube is communicated with the second cavity.

[0025] Another aspect of the embodiment of the present application provides a heat exchange module,

[0026] The heat exchange tube has a tube body, and a plurality of fins extending radially outward are arranged on the outer periphery of the tube body along the length direction of the heat exchange tube; the interval between two adjacent fins is greater than or equal to 4.5 mm, and a gap allowing water droplets to pass through is formed between the two adjacent fins;

[0027] The interval between two adjacent fins is greater than or equal to 4.5 mm.

[0028] The heat exchange tube is bent into a zigzag shape.

[0029] Another aspect of the embodiment of the present application provides a heat exchange module,

[0030] The heat exchange tube has a tube body, and a plurality of fins extending radially outward are arranged on the outer periphery of the tube body along the length direction of the heat exchange tube; the interval between two adjacent fins is greater than or equal to 4.5 mm, and a gap allowing water droplets to pass through is formed between the two adjacent fins;

[0031] A box body is arranged with a partition, thereby forming a first cavity and a second cavity on both sides of the partition, and the first end of the heat exchange tube is communicated with the first cavity; the heat exchange tube has a zigzag shape, so that the second end of the heat exchange tube is communicated with the second cavity.

[0032] Another aspect of the embodiment of the present application provides a cooling tower, which has:

[0033] The tower body includes an air inlet formed in the lower part thereof and allowing external air to flow in, and an air outlet formed in the upper part thereof and capable of discharging air flow;

[0034] A heat exchange layer includes a filler layer and a heat exchange pipe layer arranged along the up-down direction; the heat exchange pipe layer includes the heat exchange module of any one of claims 11-14;

[0035] A spraying part is arranged on the upper side of the heat exchange layer, and is used for spraying hot water to the heat exchange layer;

[0036] A water receiving part is arranged at the bottom of the cooling tower, and is used for receiving water sprayed by the spraying part;

[0037] A spraying circulating system is connected with the water receiving part at one end and connected with the spraying part at the other end, and is used for conveying water in the water receiving part to the spraying part.

[0038] In some embodiments, a plurality of partitions extending along the stacking direction of the filler sheet are arranged vertically in the region between the spraying part and the heat exchange layer, forming alternating air guiding spaces and water spraying spaces;

[0039] The heat exchange module is arranged in at least the heat exchange layer corresponding to the air guiding space.

[0040] Another aspect of the embodiment of the present application provides a closed cooling tower, comprising:

[0041] A tower body includes an air inlet formed at the lower part of the tower body and allowing external air to flow in, and an air outlet formed at the upper part of the tower body and capable of discharging air flow;

[0042] A heat exchange layer includes a heat exchange module; the heat exchange module has: a filler part formed by filler sheets arranged in layers, the filler sheets being provided with through holes, and the through holes corresponding to the filler sheets being arranged in layers to form accommodating cavities in the filler part formed by the filler sheets arranged in layers; a heat exchange pipe arranged in the accommodating cavities, the heat exchange pipe having a pipe body; the pipe body is provided with fins extending radially outward on the outer circumference of the pipe body, the fins being arranged in an array along the extension direction of the heat exchange pipe or being arranged in a spiral shape; the distance between adjacent fins is greater than or equal to 4.5 mm, and a gap allowing water droplets to pass through is formed between the adjacent fins;

[0043] A spraying part is arranged on the upper side of the heat exchange layer, and is used for spraying hot water to the heat exchange layer;

[0044] A water receiving part is arranged at the bottom of the cooling tower, and is used for receiving water sprayed by the spraying part;

[0045] A spraying circulating system is connected with the water receiving part at one end and connected with the spraying part at the other end, and is used for conveying water in the water receiving part to the spraying part.

[0046] Another aspect of the embodiment of the present application provides a cooling system, comprising:

[0047] A plurality of the closed cooling towers are connected in parallel.

[0048] A working cycle system is connected to the heat exchange modules in the closed cooling towers respectively, so that the plurality of the closed cooling towers are connected in parallel to form a working cycle loop for cooling a heat source.

[0049] Another aspect of the embodiment of the present application provides a hyperbolic cooling tower, comprising:

[0050] A tower body comprises an air inlet formed in a lower portion thereof and allowing external air to flow in, and an air outlet formed in an upper portion thereof and capable of discharging air flow;

[0051] A heat exchange layer comprises heat exchange modules; each of the heat exchange modules has a filler portion formed by filler sheets stacked, the filler sheets being provided with through holes, the corresponding through holes being stacked to form accommodating cavities in the filler portion formed by the filler sheets being stacked; a heat exchange tube is arranged in the accommodating cavities, the heat exchange tube having a tube body; the tube body is provided with fins extending radially outward, the fins being arranged in an array along an extension direction of the heat exchange tube or being arranged in a spiral manner; a distance between adjacent fins is greater than or equal to 4.5 mm, and a gap allowing water droplets to pass through is formed between the adjacent fins; and

[0052] A spraying portion is arranged on an upper side of the heat exchange layer, and the spraying portion is used for spraying hot water to the heat exchange layer.

[0053] Another aspect of the embodiment of the present application provides a water-saving and mist-eliminating cooling tower for steam condensation, comprising:

[0054] A tower body comprises an air inlet formed in a lower portion thereof and allowing external air to flow in, and an air outlet formed in an upper portion thereof and capable of discharging air flow;

[0055] A heat exchange layer comprises heat exchange modules; each of the heat exchange modules has a filler portion formed by filler sheets stacked, the filler sheets being provided with through holes, the corresponding through holes being stacked to form accommodating cavities in the filler portion formed by the filler sheets being stacked; a heat exchange tube is arranged in the accommodating cavities, the heat exchange tube having a tube body; the tube body is provided with fins extending radially outward, the fins being arranged in an array along an extension direction of the heat exchange tube or being arranged in a spiral manner; a distance between adjacent fins is greater than or equal to 4.5 mm, and a gap allowing water droplets to pass through is formed between the adjacent fins; and

[0056] A plurality of longitudinal partitions are arranged to divide an inner portion of the cooling tower into a water spraying space and an air guiding space; when steam flows in the heat exchange tube in the cooling tower, a part of a flow path of the steam is located in the water spraying space, and another part of the flow path of the steam is located in the air guiding space.

[0057] The present application designs a heat exchange tube with sparse fins, a heat exchange module, a cooling tower and a cooling system with the heat exchange tube, the fin gap of the heat exchange tube can be prevented from being blocked by water, so that it still has high heat exchange efficiency in a water spraying environment, thereby providing a new technical route for the design of a water-saving and mist-eliminating cooling tower.

[0058] In some embodiments, the filler part has ventilation channels formed between the filler sheets stacked by the filler sheets, and the heat exchange tube passes through the accommodation cavity, so it necessarily intersects with the ventilation channels. Therefore, during the flow of the cold air in the ventilation channels, it will meet the heat exchange tube and exchange heat with it. Moreover, the airflow in the filler part is turbulent, which slows down the flow speed of the cold air, which is conducive to the heat exchange between the cold air and the heat exchange tube.

[0059] In the heat exchange layer, on the one hand, the falling water can be sprayed to the outside of the heat exchange tube in the heat exchange module, and exchange heat with the hot water in the heat exchange tube. On the other hand, the cold air flowing upwards in the cooling tower can exchange heat with the circulating medium in the heat exchange tube, and exchange heat with the water sprayed by the spray circulating system, and water film can be formed on the filler sheets and fins, thereby providing a carrier for the heat exchange between water and air, and cooling the circulating medium and circulating water. By the special structure of the heat exchange tube in the present application, the water sprayed will not block the gap between the fins, and the water droplets will slide to the lower end of the fin under the guidance of the fin and drop, which will not reduce the heat exchange efficiency between the cooling medium on the inside of the heat exchange tube and the cold air on the outside.

[0060] Moreover, in operation, the hot water sprayed from the spray part has a cleaning effect on the heat exchange tube, which can wash away the willow catkins and dust carried by the external air, thereby avoiding the reduction of the heat exchange efficiency of the heat exchange tube. BRIEF DESCRIPTION OF DRAWINGS

[0061] FIG. 1 is a structural view of the heat exchange module of the first embodiment of the present application.

[0062] FIG. 2 is a structural view of the heat exchange module of the first embodiment of the present application from another perspective, and part of the filler sheets are removed.

[0063] FIG. 3 is a schematic view of the combination structure of the filler sheets and the heat exchange tube in the heat exchange module of the first embodiment of the present application.

[0064] FIG. 4 is a schematic view of the structure of the filler sheets stacked to form the accommodation cavity in the heat exchange module of the first embodiment of the present application.

[0065] FIG. 5 is a perspective view of the heat exchange tube in the heat exchange module of the first embodiment of the present application.

[0066] FIG. 6 is a schematic view of the structure of the heat exchange tube in the heat exchange module of the first embodiment of the present application.

[0067] Figure 7 is a schematic view of the structure of the heat exchange module assembly of the first embodiment of the present application, wherein the packing sheet is removed.

[0068] Figure 8 is a schematic view of the external structure of one embodiment of a cooling tower using the heat exchange module of the present application.

[0069] Figure 9 is a schematic view of the structure of the heat exchange layer and the spray system in the cooling tower shown in Figure 8.

[0070] Figure 10 is a sectional view of Figure 8.

[0071] Figure 11 is a sectional view of A-A in Figure 10.

[0072] Figure 12 is another embodiment of a cooling tower using the heat exchange module of the present application.

[0073] Figure 13 is yet another embodiment of a cooling tower using the heat exchange module of the present application.

[0074] Figure 14 is yet another embodiment of a cooling tower using the heat exchange module of the present application, wherein the cooling tower is a hyperbolic cooling tower.

[0075] Figure 15 is a partial plan view of the heat exchange module of the present application.

[0076] Figure 16 is a schematic view of the principle of water droplet formation at the bottom of the tube when a coil tube is used as the heat exchange tube in the prior art.

[0077] Figure 17 is a schematic view of the guiding process of the fin of the heat exchange tube of the present application to the water droplet.

[0078] Figure 18 is a schematic view of the structure of the heat exchange tube of another embodiment of the present application.

[0079] Figure 19 is a schematic view of the structure of the heat exchange module of the second embodiment of the present application.

[0080] Figure 20 is a cooling tower of another embodiment of the present application, wherein the packing layer is located on the upper side of the heat exchange tube layer.

[0081] Figure 21 is a schematic view of the first working mode of the cooling tower shown in Figure 20.

[0082] Figure 22 is a schematic view of the second working mode of the cooling tower shown in Figure 20.

[0083] Figure 23 is a cooling tower of another embodiment of the present application, which is a closed cooling tower.

[0084] Figure 24 is a cooling tower of another embodiment of the present application, wherein the packing layer is located on the lower side of the heat exchange tube layer.

[0085] Figure 25 is a cooling tower according to another embodiment of the present application, wherein a plurality of vertically extending partitions are provided in the cooling tower;

[0086] Figure 26 is a cooling tower according to another embodiment of the present application, wherein the packing section and the heat exchange tube group are arranged in a horizontal direction.

[0087] Figure 27 is a schematic view of a heat exchange tube according to another embodiment of the present application.

[0088] Figure 28 is a cooling tower according to another embodiment of the present application.

[0089] Figure 29 is a cooling tower according to another embodiment of the present application, wherein the cooling tower is in a non-mist elimination mode.

[0090] Figure 30 is a cooling tower according to another embodiment of the present application, wherein the cooling tower is in a mist elimination mode.

[0091] Figure 31 is a schematic view of a cooling system formed by combining an air cooler and a closed cooling tower.

[0092] Figure 32 is a schematic view of a cooling system formed by combining a plurality of cooling towers according to the present application.

[0093] Figure 33 is a schematic view of a closed cooling tower according to the present application.

[0094] Symbol explanation 1, 2, 3, 4, 5, 6, 6', 7, 8, 9, 9' cooling tower; 1100a, 1100b, 1100n, cooling tower; 10, tower body; 11, air inlet; 12, air outlet; 20, spraying part; 21, spraying pipe; 22, nozzle; 23, spraying valve; 30, 31, 32, 33, 34, 35, 36, 37, heat exchange layer; 341, filler layer; 342, heat exchange pipe layer; 361, filler module; 40, water supply pipeline; 41, water inlet pipe; 42, branch valve; 43, water return pipe; 44, main pipeline; 45, spraying main valve; 46, water return pipeline; 47, water return pump; 48, constant pressure water supply unit; 50, partition plate; 51, water spraying space; 52, air induction space; 60, mixing layer; 70, water receiving part; 80, air exhaust part; 81, power element; 82, leaf piece; 100, 100a, 100b, 200, heat exchange module; 110, filler part; 111, filler piece; 1111, ventilation channel; 112, through hole; 113, accommodating cavity; 120, heat exchange pipe group; 121, heat exchange pipe; 122, fin; 123, gap part; 124, pipe body; 125, guide part; 130, first box body; 131, first port, 132, second port; 133, separation piece; 140, second box body; 700, spraying circulation system; 710, circulation pump; 800, heat source; 900, metal pipe; 910, water droplet; 920, collection area; 1000, cooling system; 9000, cooling system; 9100, closed cooling tower; 9120, spraying part; 9130, heat exchange layer; 9131, filler layer; 9132, light pipe layer; 9200, air cooler; 9210, densely arranged finned tube layer. DETAILED DESCRIPTION

[0095] Other objects and advantages of the present application will become apparent from the following preferred embodiments of the present application.

[0096] Hereinafter, preferred embodiments of the present application will be described in detail with reference to the accompanying drawings.

[0097] As shown in the lower right corner of FIG. 1, for the purpose of clearly describing the technical solutions of the present application, directions are illustrated in FIG. 1, wherein the left-right direction is the width direction of the heat exchange module 100 and the filler piece 110; the front-rear direction is the stacking direction of the filler piece 110; and the up-down direction is the up-down direction of the cooling tower 1 and the heat exchange module 100.

[0098]

Heat exchange module 100

[0099] Fig. 1 is a schematic structural diagram of the heat exchange module 100 of the first embodiment of the present application, in which the first housing 130 is located at the front side. Fig. 2 is a structural diagram of the heat exchange module 100 of the first embodiment of the present application from another perspective, in which the first housing 130 is located at the rear side, and in order to clearly show the structure, part of the filler sheet 111 is removed. Fig. 3 is a schematic diagram of the combined structure of the filler sheet 111 and the heat exchange tube 121 in the heat exchange module 100 of the first embodiment of the present application. Fig. 4 is a schematic diagram of the layering structure of the filler sheet 111 in the heat exchange module 100 of the first embodiment of the present application.

[0100] As shown in Figs. 1 to 4, in the present embodiment, the heat exchange module 100 comprises a filler portion 110 formed by layering filler sheets 111, a plurality of filler sheets 111 being layeringly arranged in the front-rear direction, and a flow path for flowing air and / or water being formed between adjacent filler sheets 111.

[0101] In the present embodiment, the filler sheet 111 is provided with a through hole 112, which can be, for example, a circular hole, a square hole or a hole of other geometric shapes, and the present application does not make special limitations thereon.

[0102] There can be a plurality of through holes 112 in one filler sheet 111, and the plurality of through holes 112 are distributed in a regular (for example, array) or irregular manner. In the filler portion 110 formed by layering the filler sheets 111, the corresponding through holes 112 are layeringly formed into accommodating cavities 113. In some embodiments, the extension direction of the accommodating cavities 113 is parallel to the layering direction of the filler sheets 111; in other embodiments, the extension direction of the accommodating cavities 113 and the layering direction of the filler sheets 111 have an included angle less than 90°.

[0103] In some embodiments, the same filler sheet 111 comprises a plurality of independent through holes 112; but in other embodiments, part or all of the through holes 112 can intersect.

[0104] The heat exchange pipe 121 passes through the accommodation cavity 113. In some embodiments, the length of the heat exchange pipe 121 is greater than the length of the accommodation cavity 113, one end of the heat exchange pipe 121 extends to the outside of one side of the accommodation cavity 113 in the front-rear direction, and the other end extends to the outside of the other side of the accommodation cavity 113 in the front-rear direction, that is, both ends of the heat exchange pipe 121 extend out of both ends of the accommodation cavity 113, respectively. In other embodiments, the heat exchange pipe 121 described above can be bent into a U shape, one branch of the U shape passes through one accommodation cavity 113, and the other branch passes through the other accommodation cavity 113. In addition, both branches of the U shape can pass through the same accommodation cavity 113. In yet other embodiments, the heat exchange pipe 121 can pass through two or more bends and pass through at least one of the above-mentioned accommodation cavities 113. The bending of the heat exchange pipe 121 described above can be achieved by heating and bending, or by welding or connecting elbows.

[0105] In some embodiments, the number of accommodation cavities 113 corresponds to the number of heat exchange pipes 121. In other embodiments, multiple heat exchange pipes 121 can be placed in one accommodation cavity 113, that is, the number of heat exchange pipes 121 is greater than the number of accommodation cavities 113. The multiple heat exchange pipes 121 described above form a heat exchange pipe group 120.

[0106] As shown in FIGS. 1 and 2, one side of the front-rear direction of the filler portion 110 (i.e., the stacking direction of the filler sheet 111) is provided with a first box 130, and the other side of the front-rear direction is provided with a second box 140. One end of the heat exchange pipe 121 communicates with the first box 130, and the other end communicates with the second box 140.

[0107] In some embodiments, the first port 131 and the second port 132 of the heat exchange module 100 are located on the same box, a partition sheet 133 extending horizontally or vertically is installed in the middle of the box, and the first port 131 and the second port 132 are located on both sides of the partition sheet 133, respectively.

[0108] For example, as shown in FIG. 1, the partition 133 extends along the horizontal direction to divide the first box 130 into two parts, i.e., an upper first cavity and a lower second cavity. The first port 131 is located on the front wall of the first box 130 and on the lower side of the partition 133, while the second port 132 is located on the front wall of the first box 130 and on the upper side of the partition 133. The second box 140 is not provided with a partition, i.e., the second box 140 is a complete cavity. For another example, the partition 133 can also extend along the vertical direction to divide the inner cavity of the first box 130 into two parts, i.e., a left first cavity and a right second cavity. In use, fluid can be injected into the first box 130 of the heat exchange module 100 through the first port 131, flow through part of the heat exchange pipes 121 to the second box 140, and then flow through the remaining heat exchange pipes 121 back to the first box 130 and out of the second port 132.

[0109] The position of the first port 131 is set to be lower than that of the second port 132, which is beneficial to filling the fluid in each heat exchange pipe 121 inside the heat exchange module 110, thereby improving the heat exchange efficiency.

[0110] In other embodiments, the first port 131 is located on the front wall of the first box 130, while the second port 132 is located on the rear wall of the second box 140 (not shown), and no partition is provided in the first box 130 and the second box 140. In use, the fluid flows into the first port 131 and out of the second port 132.

[0111] The heat exchange module 100 has multiple working modes, and the first working mode is to pass hot water into the heat exchange pipe group 120, and air flows through the outer space of the heat exchange pipe group 120 along a direction perpendicular to the stacking of the filler sheets 111, so that the air and the hot water in the heat exchange pipes 121 exchange heat to cool the hot water. In the first working mode, the hot water flows in the heat exchange pipe group 120 without contacting the air, thereby avoiding evaporation of water and achieving remarkable water-saving effect.

[0112] As shown in FIG. 15, the filler part 110 has the ventilation channels 1111 between the filler sheets 111 formed by stacking the filler sheets 111, and the heat exchange pipes 121 pass through the accommodation cavities 113 and intersect with the ventilation channels 1111. Therefore, the cold air flow meets the heat exchange pipes 121 and exchanges heat with them during the flow in the ventilation channels 1111. Moreover, the air flow in the filler part 110 is turbulent, which slows down the flow speed of the cold air flow and is beneficial to the heat exchange between the cold air flow and the heat exchange pipes 121.

[0113] The second working mode is to spray hot water to the filler part 110 from the upper side of the heat exchange module 100, and air flows upward from the lower side of the heat exchange module 100, and the hot water and the air flow exchange heat and evaporative heat. The second working mode has the advantage of high heat exchange efficiency.

[0114] The third working mode is to spray hot water to the filler part 110 from the upper side of the heat exchange module 100, and at the same time, cooling medium (such as cold water, R410A, E32, etc. refrigerant) is introduced into the heat exchange tube group 120, and air flows upward from the lower side of the heat exchange module 100, and the hot water and the air flow exchange heat and evaporative heat, and at the same time, the cooling medium in the heat exchange tube group 120 exchanges heat with the hot water through the pipe wall of the heat exchange pipe 121 and the fin 122, thereby forming an organic combination of multiple heat exchange modes, and improving the heat exchange efficiency. The heat exchange module 100 of the present application provides a new technical route for the design of cooling towers.

[0115]

Filler part 110

[0116] The filler part 110 can be one or a combination of the following fillers: S-wave filler, oblique staggered filler, stepped trapezoidal oblique wave filler, differential sinusoidal wave filler, point wave filler, hexagonal honeycomb filler, bidirectional wave filler, and oblique folded wave filler. The role of the filler in the cooling tower is to increase the heat dissipation, prolong the residence time of the cooling water, increase the heat exchange area, and increase the heat exchange capacity.

[0117] The filler sheet 111 in the filler part 110 is different from the conventional filler sheet in that one or more through holes 112 are provided on the filler sheet 111 of the present embodiment. When a plurality of filler sheets 111 are stacked to form the filler part 110, the through holes 112 are stacked to form a receiving cavity 113 capable of accommodating the heat exchange pipe 121.

[0118]

Heat exchange pipe 121

[0119] FIG. 5 is a perspective view of the heat exchange pipe 121 in the heat exchange module 100 of the first embodiment of the present application. FIG. 6 is a structural schematic view of the heat exchange pipe 121 in the heat exchange module 100 of the first embodiment of the present application.

[0120] As shown in FIGS. 5 and 6, the heat exchange pipe 121 is provided with a plurality of fins 122 extending radially outward on the outer circumference. The fins 122 increase the heat dissipation area of the heat exchange pipe 121. The heat exchange pipe 121 and the fins 122 can be made of metal materials with high thermal conductivity, such as copper, aluminum, etc.; or other non-metallic materials with high thermal conductivity, such as composite materials containing graphene, etc.

[0121] The plurality of fins 122 are arranged along the length direction of the heat exchange pipe 121. In some embodiments, the plurality of fins 122 are uniformly arranged along the length direction of the heat exchange pipe 121, and in other embodiments, the plurality of fins 122 are non-uniformly arranged along the length direction of the heat exchange pipe 121.

[0122] The distance between two adjacent fins in a conventional heat exchange pipe is small (about 1 mm or even smaller), and the fins are arranged closely, which aims to increase the contact area with air to improve the heat exchange efficiency. For a long time, those skilled in the art have formed a consensus that the heat exchange pipe can only be used for heat exchange between air and fluid, the fluid flows in the heat exchange pipe, and the air flows through the outside of the heat exchange pipe to exchange heat with the fluid through the closely arranged fins. The closer the fins, the larger the heat exchange area, but the heat exchange pipe with the above-mentioned closely arranged fin structure cannot be used for heat exchange in the water spraying environment inside the cooling tower.

[0123] The inventors of the present application found through long-term exploration and experiments that the reason why the above-mentioned heat exchange pipe cannot work normally when applied to the heat exchange module 100 of the present application is that the gap between the fins will be blocked by water, causing the heat exchange efficiency of the heat exchange pipe to be greatly reduced. Therefore, in the technical solution of the present application, the structure of the heat exchange pipe is specially designed, as shown in FIG. 6, the distance between two adjacent fins 122, i.e. the width d of the gap part 123, is greater than or equal to 4.5 mm, for example, it can be 5.5 mm, 5.6 mm, 5 mm, 6 mm, 8 mm, …… In the present embodiment, by setting the distance d between two adjacent fins 122 to be greater than or equal to 4.5 mm, i.e. greater than the maximum diameter of at least part of the water droplets, the above-mentioned gap part 123 of the heat exchange pipe 121 is prevented from being blocked by water, so that it still has a high heat exchange efficiency in the water spraying environment. Further preferably, the distance d between the above-mentioned two adjacent fins 122 is greater than or equal to 5 mm.

[0124] In practice, the inventors of the present application also found that the reason why the heat exchange efficiency of the metal pipe 900 (such as a copper pipe) without fins is low in the water spraying environment is also related to the formation of a water collection area 920 at the lowest position of the lower surface of the metal pipe 900 by water droplets. The process is as follows, as shown in FIG. 16, in the water spraying environment, water droplets 910 fall on the metal pipe 900, slide down along the outer surface of the metal pipe 900, and collect at the lowest position of the lower surface of the metal pipe 900 to form a collection area 920. The above-mentioned collection area 920 covers part of the area of the bottom of the metal pipe 900, which reduces the heat exchange area of the inner and outer media of the metal pipe 900, and reduces the heat exchange efficiency of the two media.

[0125] The heat exchange tube 121 of the present application can solve the problem of water gathering at the bottom of the metal tube 900. As shown in Fig. 17, the water droplet 910 drops on the tube body 124 of the heat exchange tube 121, slides down along the outer surface of the tube body 124, and gathers at the lower side of the tube body 124. However, due to the influence of the fins 122, the gathered water droplet slides down under the influence of the fins 122 and gathers at the lower side of the fins 122. Since the fins 122 are in the form of a sheet, the surface area of the outer contour is small, which is conducive to the falling of the water droplet. Therefore, the fins 122 not only increase the heat dissipation area of the heat exchange tube 121, but also play a guiding role for the water droplet at the lower side of the tube body 124 in a water spraying environment, so as to avoid the formation of the gathering area 920 at the lower side of the tube body 124, thereby reducing the heat dissipation area of the tube body 124.

[0126] In order to further improve the guiding effect on water, as shown in Fig. 18, a guiding portion 125 is arranged at the connection between the fin 122 and the tube body 124. The guiding portion 125 can be, for example, an arc-shaped structure or a chamfer structure formed between the fin 122 and the tube body 124, so that the water droplet is more easily slid from the surface of the tube body 124 to the fin 122. Further, the guiding portions 125 located at both sides of the groove of the gap portion 123 can be connected together, so as to form an arc-shaped bottom around the tube body 124 at the bottom of the groove of the gap portion 123, which is more conducive to the sliding of the water droplet to the fin 122.

[0127] In addition, the cross section of the tube body 124 of the heat exchange tube 121 described above can be elliptical, and the outer contour of the fin 122 can be circular. Compared with the case where the tube body 124 is circular, the elliptical tube body 124 is longer in the up-down direction, has a larger flow area and heat exchange area, and further improves the heat exchange efficiency of the heat exchange tube 121 and water.

[0128]

Combination of heat exchange module 100

[0129] Fig. 7 is a structural schematic view of the combination of the heat exchange module of the first embodiment of the present application, in which the filler sheet is removed for clear display.

[0130] In the cooling tower, in order to supply water to the heat exchange module 100, as shown in Fig. 7, in some embodiments, two heat exchange modules 100 are installed back to back to form a combination of heat exchange modules 100. Specifically, two heat exchange modules 100a and 100b are installed in an arrangement that the second box 140 of the heat exchange module 100a is adjacent to the second box 140 of the heat exchange module 100b. Thus, the first box 130 of the heat exchange module 100a is located on the outside, and the first box 130 of the heat exchange module 100b is also located on the outside. Meanwhile, the first port 131 and the second port 132 are located on the end plate of the first box 130 of each heat exchange module 100, so as to facilitate the supply of water to each heat exchange module 100 through the pipeline.

[0131]

Water supply pipeline 40

[0132] Fig. 8 is an embodiment of a cooling tower using the heat exchange module of the present application. Fig. 9 is a structural schematic diagram of the heat exchange layer 30 and the spray system in the cooling tower shown in Fig. 8.

[0133] As shown in Figs. 8 and 9, a water supply system is used to supply hot water to the heat exchange module 100 from both sides of the cooling tower 1.

[0134] Hereinafter, the water supply pipeline 40 on one side of the cooling tower 1 will be taken as an example for description, wherein the water supply pipeline 40 includes a main pipeline 44, the main pipeline 44 is communicated with the first port of each heat exchange module 100 through a plurality of water inlet pipes 41; the main pipeline 44 is also communicated with the spray pipe 21 on the spray part 20, and is used to supply water to the spray part 20.

[0135] In the heat exchange layer 30, the water inlet pipe 41 is connected with a branch valve 42 in series. The branch valve 42 is used to open or close the water supply to each heat exchange module 100, that is, when the branch valve 42 is opened, the hot water in the heat exchange pipe 121 of the corresponding heat exchange module 100 can flow, and the hot water in the heat exchange pipe 121 can be cooled by the air flowing in the cooling tower 1; when the branch valve 42 is closed, the hot water in the heat exchange pipe 121 of the corresponding heat exchange module 100 does not flow, and the hot water can be cooled by the air flowing in the cooling tower 1 through the spray.

[0136] In the spray part 20, the spray pipe 21 is a plurality of pipes and is arranged in parallel with each other, and a plurality of spray heads 22 are uniformly arranged on the spray pipe 21. In some embodiments, the extension direction of the spray pipe 21 is the same as the length direction of the heat exchange module 100, and preferably, a spray valve 23 is installed on the inlet of each spray pipe 21, so that the hot water spray in part of the area can be closed and the hot water spray in the remaining part of the area can be opened. In some embodiments, a spray main valve 45 can also be installed on the main pipeline 44, which is used to uniformly close or open the hot water supply of the spray part 20.

[0137] In some embodiments, the heat exchange module 100 and the spray section 20 can be supplied with different media through different pipes, i.e. one kind of medium is supplied into the spray section 20, while another kind of medium is supplied into the heat exchange module 100.

[0138]

Cooling tower 1

[0139] Fig. 10 is a sectional view of Fig. 8, i.e. a structure schematic view along the length direction of the heat exchange module 100. Fig. 11 is an A-A sectional view of Fig. 10.

[0140] As shown in Figs. 10 and 11, the cooling tower 1 comprises a tower body 10, which has an air inlet 11 arranged at the lower side of the tower body 10 for flowing in external air, and an air outlet 12 arranged at the top of the tower body 10 for discharging air flow.

[0141] In the present embodiment, an air exhaust section 80 is arranged in the air outlet 12 of the cooling tower 1, which comprises a power element 81 and a vane 82. The power element 81 is used to drive the vane 82 to rotate to attract external air, so that cool air flows in from the air inlet 11 at the lower layer of the cooling tower 1, sequentially passes through the heat exchange layer 30, the spray section 20 and is discharged from the air outlet 12 at the top.

[0142] Working state one

[0143] As described above, the working state of the cooling tower 1 is set to the winter working state. At this time, hot water is supplied into the heat exchange pipe group 120, and air flows through the outer space of the heat exchange pipe group 120 from bottom to top, and the air exchanges heat with the hot water in the heat exchange pipe 121 to cool the hot water. In the working state one, the hot water flows in the heat exchange pipe group 120 without contacting with the air, so that the evaporation of water is avoided, and the water saving and fog eliminating effects are outstanding.

[0144] The operation process of the working state one is that the spray main valve 45 is closed, and each branch valve 42 is opened, the hot water flows from the main pipe 44 to the first port 131 of each heat exchange module 100, and after being cooled and cooled by each heat exchange module 100, flows from the second port 132 to the return water pipe 43, and is supplied to the factory for circulation.

[0145] Working state two

[0146] When in the summer working state, hot water is sprayed from the upper side of the heat exchange module 100 to the filler section 110, and air flows from the lower side of the heat exchange module 100 upward, the hot water contacts and exchanges heat with the air flow and evaporates, so that the heat exchange efficiency is high.

[0147] The hot water to be treated sprayed from the spraying section 20 to each heat exchange module 100 of the heat exchange layer 30 is cooled by each heat exchange module 100 and then falls to the water collecting section 70 at the bottom of the tower body 10, and the cooled water is collected by a collecting device such as a water pump and recycled for use in the factory.

[0148]

Cooling tower 2

[0149] The cooling tower 2 further comprises a plurality of partitions 50 arranged vertically between the spraying section 20 and the heat exchange layer 30 and extending along the length direction of the heat exchange module 100. Preferably, the partitions 50 can be arranged between two adjacent heat exchange modules 100 and extend downward through the heat exchange layer 30 by a certain distance. Thus, the corresponding area inside the cooling tower 2 is divided into a plurality of interval spaces 51, 52 by the partitions 50. The interval space 51 serves as a water spraying space (hereinafter referred to as the water spraying space 51 for convenience of description) for spraying hot water, and the interval space 52 serves as a gas induction space (hereinafter referred to as the gas induction space 52 for convenience of description) for inducing gas from bottom to top. The water spraying space 51 and the gas induction space 52 are arranged alternately in the stacking direction perpendicular to the filler sheet 111 of the matrix formed by the heat exchange modules 100.

[0150] In the water spraying space 51, the spraying valve 23 of the corresponding spraying pipe 21 at the upper side is opened, and the branch valve 42 upstream of the heat exchange module 100 in the water spraying space 51 is closed. In the gas induction space 52, the spraying valve 23 of the corresponding spraying pipe 21 at the upper side is closed, and the branch valve 42 upstream of the heat exchange module 100 in the gas induction space 52 is opened.

[0151] Based on the above arrangement, the cooling tower 2 has a working state three, i.e. water spraying in the water spraying space 51, and no water circulation in the heat exchange tube 121 of the heat exchange module 100 in the water spraying space 51; and no water spraying in the gas induction space 52, but water circulation in the heat exchange tube 121 of the heat exchange module 100 in the gas induction space 52.

[0152] In the working state three, the dry and cold air from outside contacts and exchanges heat with the hot water and evaporates and exchanges heat with the hot water after passing through the water spraying space 51, becoming wet and hot air; the dry and cold air from outside exchanges heat with the water in the heat exchange tube 121 after passing through the gas induction space 52, becoming dry and hot air, and the wet and hot air and the dry and hot air both flow upward and mix in the mixing layer 60, playing a role of fog elimination.

[0153]

Cooling tower 3

[0154] The cooling tower 3 is further improved on the basis of the cooling tower 2, and the heat exchange module 100 in the water spraying space 51 is replaced by a conventional filler, i.e. a filler without heat exchange pipes, so that the cost can be reduced. The conventional filler can be one or a combination of the following filler pieces: S-wave filler, oblique staggered filler, stepped trapezoidal oblique wave filler, differential sinusoidal wave filler, point wave filler, hexagonal honeycomb filler, bidirectional wave filler, oblique folded wave filler, etc.

[0155]

Cooling tower 4

[0156] The cooling tower 4 is different from the aforementioned cooling towers 1, 2 and 3 in that the tower body 10 is a hyperbolic cooling tower, and the principle is to use the upward lift of hot air to generate air flow, so that the power element 81 and the vane 82 can be omitted, and the energy consumption is reduced. Specifically, the cooling tower 4 comprises a tower body 10, the tower body 10 has an air inlet 11 arranged at the lower side of the tower body 10 for flowing in external air, and an air outlet 12 arranged at the top of the tower body 10 for discharging air flow.

[0157] Inside the cooling tower 4, a heat exchange layer 33 and a spraying part 20 are sequentially arranged from bottom to top, and the hot water sprayed from the spraying part 20 exchanges heat with the cold air flowing from bottom to top in the cooling tower 4 at the heat exchange layer 33. At the same time, the above-mentioned cold air and spraying water can reduce the temperature of the circulating medium in the heat exchange pipe 121 in the heat exchange layer 33.

[0158] The inside of the cooling tower 4 is provided with a spraying circulating system 700 for pumping water from the water collecting part 70 and supplying water to the spraying part 20, and the spraying circulating system 700 comprises a circulating pump 710, the suction end of which is connected with the water collecting part 70, and the discharge end of which is connected with the heat exchange module 200.

[0159] In winter, the cold air has strong cooling capacity, and the circulating pump 710 does not need to be started, and only the cold air can be used to cool the circulating medium in the heat exchange pipe 121. Moreover, the circulating medium does not contact with the cold air, i.e. evaporation does not occur, so that the technical problem of mist at the air outlet 12 of the cooling tower in winter is completely solved.

[0160] In summer, the temperature of the external air is high, and the cooling capacity for the circulating medium is reduced or even disappears, at this time, the circulating pump 710 is started, and the circulating water and air in the cooling tower 4 cool the circulating medium in the heat exchange pipe 121. At the same time, the surface of the filler piece 111 and / or the fin 122 of the heat exchange pipe 121 forms a water film, which increases the contact area of the circulating water and air, and cools the circulating water.

[0161] The heat exchange module 100 of the present application can be installed in the cooling tower 4. Specifically, the spraying part 20 is located on the upper side of the heat exchange layer 33, and is used to spray medium to the heat exchange layer 33. When the heat exchange module 100 is used, the heat exchange pipe 121 passes through the accommodating cavity 113 formed by the lamination of the filler sheet 111, and the heat exchange pipe 121 generates a spoiler effect on the air between the filler sheets 111, prolongs the heat exchange time of the air and the circulating water, and comprehensively improves the cooling effect of the circulating water and the air on the circulating medium.

[0162] The heat exchange layer 33 in the cooling tower 4 can have multiple options, such as installing only the heat exchange module 100 of the present application, or arranging the heat exchange module 100 and the conventional filler in a horizontal direction. Alternatively, the heat exchange layer 33 is formed by using the heat exchange pipe layer 342 composed of the heat exchange module 200, and installing the filler layer 341 composed of the ordinary filler on the upper side or the lower side of the heat exchange module 200. Details are described below.

[0163]

Heat exchange module 200

[0164] FIG. 19 is a schematic structural view of the heat exchange module 200 of the second embodiment of the present application.

[0165] As shown in FIG. 19, the heat exchange module 200 can include one or more heat exchange pipes 121, and the plurality of heat exchange pipes 121 are arranged in parallel. A first box 130 is arranged at one end of the heat exchange pipe 121, and a second box 140 is arranged at the other end. The two ends of the heat exchange pipe 121 are in communication with the first box 130 and the second box 140, respectively. The flow path of hot water has multiple options. One of the flow paths is that hot water is injected into the first box 130, and the hot water flows into the second box 140 after heat exchange with the medium outside the heat exchange pipe 121. The second flow path is that a partition sheet is arranged in the first box 130, and the inner cavity of the first box 130 is divided into a first cavity and a second cavity. Hot water is injected into the first cavity, and then flows into the second box 140 through the part of the heat exchange pipe 121 in communication with the first cavity, and then flows into the second cavity through the second box 140 and the remaining part of the heat exchange pipe 121 in communication with the second cavity.

[0166] In addition, one heat exchange pipe 121 can be included in one heat exchange module 200, and the heat exchange pipe 121 is formed in a zigzag shape by repeated bending. In this way, hot water is introduced from one end of the heat exchange pipe 121, and flows out from the other end after flowing through the entire length of the heat exchange pipe 121.

[0167] It can be seen that the difference between the heat exchange module 200 and the heat exchange module 100 is that the filler sheet 111 is not arranged in the heat exchange module 200. Compared with the heat exchange module 100, the heat exchange module 200 has the advantages of convenient maintenance and low manufacturing cost.

[0168]

Cooling tower 5

[0169] Figure 20 is a cooling tower using the heat exchange module 200 of one embodiment of the present application, wherein the packing layer 341 is located on the upper side of the heat exchange tube layer 342.

[0170] As shown in Figure 20, the heat exchange layer 34 includes the packing layer 341 and the heat exchange tube layer 342, and the heat exchange tube layer 342 is located on the lower side of the packing layer 341. The heat exchange tube layer 342 can be formed by laying a plurality of heat exchange modules 200.

[0171] On the lower side of the cooling tower 5, the side wall is provided with an air inlet 11, and on the top of the cooling tower 5, an air outlet 12 is provided. The cold air from the outside flows into the cooling tower 5 through the air inlet 11, and then flows through the heat exchange tube layer 342, the packing layer 341, the spraying part 20, and the mixing layer 60 to the air outlet 12.

[0172] The cooling tower 5 has multiple working modes, which will be described one by one as follows:

[0173] The first working mode is shown in Figure 21, in which hot water is supplied to the spraying pipe 21 of the spraying part 20 through the main pipe 44, and the hot water is sprayed from the spray head 22 to the heat exchange layer 34.

[0174] In the heat exchange layer 34 described above, the packing layer 341 and the heat exchange tube layer 342 together provide a heat exchange area for the heat exchange between the hot water from top to bottom and the cold air from bottom to top, thereby increasing the heat exchange area between water and air. In this embodiment, the heat exchange tube 121 has a special design with wide fin spacing and gap 123 between fins that is not easy to be blocked by water, so that it can be used as packing in a water spraying environment.

[0175] After heat exchange with the cold air, the water with reduced temperature falls into the water receiving part 70 and can be pumped by the water pump to the return water pipe 46 and then transported to the heat source 800 for cooling. The circulating water is heated again after passing through the heat source 800 and then transported to the cooling tower 5 through the main pipe 44 for cooling treatment.

[0176] The second working mode is shown in Fig. 22. In winter, the outside temperature is low. The heat exchange tube layer 342 alone can meet the demand for cooling the circulating water. Therefore, in the second working mode, the main pipe 44 delivers the hot water to be cooled to each heat exchange module 200 of the heat exchange tube layer 342. The hot water circulates inside the heat exchange tube 121 of the heat exchange module 200, and the cold air flows into the cooling tower 5 from the air inlet 11 under the suction of the fins 82 of the air exhaust part 80, exchanges heat with the hot water inside the heat exchange tube 121, and cools the hot water. The cooled hot water can be discharged into the water receiving part 70 and then delivered to the heat source 800 by the return water pipe 46 to cool the heat source 800, thus forming a circulating flow path.

[0177] In the second working mode, the hot water in the heat exchange module 200 exchanges heat with the cold air without direct contact. Therefore, the second working mode completely eliminates the formation of water mist, and the water saving and mist elimination effects are particularly significant.

[0178]

Cooling tower 6

[0179] The internal structure of the cooling tower 6 is substantially the same as that of the cooling tower 5, except that the cooling tower 6 is a closed cooling tower, as shown in Fig. 23.

[0180] Specifically, the cooling tower 6 includes a working circulation system. In the working circulation system, the cooling medium flows from the heat source 800 to the heat exchange module 200 of the heat exchange tube layer 342 through the main pipe 44, flows through the heat exchange module 200, and then converges to the return water pipe 46 and flows to the heat source 800 through the return water pipe 46 to cool the heat source 800, thus forming a working circulation loop between the cooling tower 6 and the heat source 800. The cooling medium can be water, coolant, etc.

[0181] The cooling tower 6 also includes a spray circulation system 700. The spray circulation system 700 includes a circulating pump 710. The suction end of the circulating pump 710 is connected to the water receiving part 70, and the discharge end of the circulating pump 710 is connected to the spray part 20. The circulating pump 710 can suck water from the water receiving part 70 and supply water to the spray part 20. The water sprayed by the spray head 22 of the spray part 20 exchanges heat with the outside air in the filler layer 341 and is cooled before being sprayed to the heat exchange tube layer 342.

[0182] In the heat exchange pipe layer 342, on one hand, the water falling from the filler layer 341 will be sprinkled to the outside of the heat exchange pipe 121 in the heat exchange module 200, and heat exchange with the hot water in the heat exchange pipe 121. On the other hand, the cold air flowing from the bottom to the top in the cooling tower 6 will exchange heat with the circulating water in the heat exchange pipe 121, and exchange heat with the water sprinkled by the spray circulating system 700, so as to cool down the two. By the special structure of the heat exchange pipe 121 in the present application, the sprinkled water will not block the gap part 123 between the fins 122, and the water droplets will slide to the lower end of the fin 122 under the guidance of the fin 122 and drop, so as to avoid reducing the heat exchange efficiency between the cooling medium on the inside of the heat exchange pipe 121 and the cold air on the outside.

[0183] In addition, in the working process, the hot water sprayed from the spray part 20 has a cleaning effect on the heat exchange pipe 121, which can wash away the willow catkins and dust carried by the external air, so as to avoid reducing the heat exchange efficiency of the heat exchange pipe 121.

[0184] In addition, the heat exchange module 100 can also be used in the cooling tower 6 instead of the heat exchange module 200.

[0185]

Cooling tower 6'

[0186] As shown in FIG. 24, the cooling tower 6' is different from the cooling tower 5 and the cooling tower 6 in that the heat exchange pipe layer 342 is installed on the upper side of the filler layer 341 in the cooling tower 6'. The water sprinkled from the spray part 20 is first sprinkled on the heat exchange pipe layer 342, and then falls to the filler layer 341 through the heat exchange pipe layer 342. The cooling tower 6' can be an open cooling tower or a closed cooling tower.

[0187]

Cooling tower 7

[0188] The cooling tower 7 further increases a plurality of partitions 50 on the basis of the cooling tower 5. Specifically, as shown in FIG. 25, a plurality of partitions 50 extending along the length direction of the heat exchange module 200 are vertically arranged in the region between the spray part 20 and the heat exchange layer 34. Preferably, the partitions 50 can be arranged between two adjacent heat exchange modules 200, and extend downward by a certain distance. Thus, the corresponding region inside the cooling tower 7 is divided into a plurality of interval spaces 51, 52 by the partitions 50. Among them, the interval space 51 is used as a water sprinkling space for spraying hot water, and the interval space 52 is used as a gas attracting space for attracting gas from the bottom to the top. The water sprinkling space 51 and the gas attracting space 52 are alternately arranged in the stacking direction perpendicular to the filler sheet 111 of the matrix composed of the heat exchange modules 200.

[0189] During the operation of the cooling tower 8, the nozzles 22 of the spray section 20 in the water spraying space 51 are opened, while the nozzles 22 of the spray section 20 in the air inducing space 52 are closed. That is, water is sprayed in the water spraying space 51, while no water is sprayed in the air inducing space 52, and hot water is circulated in the heat exchange tubes 121 in the heat exchange module 100 in the air inducing space 52.

[0190] The dry and cold air from the outside is changed into wet and hot air through the water spraying space 51 by contact heat exchange and evaporation heat exchange with the hot water. The dry and cold air from the outside is changed into dry and hot air through the air inducing space 52 by interval heat exchange with the water in the heat exchange tubes 121. The wet and hot air and the dry and hot air both flow upward and mix in the mixing layer 60, thereby playing a role in fog elimination.

[0191]

Cooling tower 8

[0192] As shown in FIG. 26, the heat exchange layer 36 of the cooling tower 8 includes heat exchange modules 200 and filler modules 361 arranged alternately in the horizontal direction, and further includes a plurality of partitions 50. Specifically, a plurality of partitions extending along the length direction of the heat exchange module 200 are arranged vertically in the region between the spray section 20 and the heat exchange layer 36. Preferably, the partitions 50 can be arranged, for example, between two adjacent heat exchange modules 200 and extend downward by a certain distance through the heat exchange layer 30. Thus, the corresponding region inside the cooling tower 8 is divided into a plurality of interval spaces 51, 52 by the partitions 50. Among them, the interval space 51 serves as a water spraying space (hereinafter referred to as the water spraying space 51) for spraying hot water, and the interval space 52 serves as an air inducing space (hereinafter referred to as the air inducing space 52) for inducing air from the bottom to the top. The water spraying space 51 and the air inducing space 52 are arranged alternately.

[0193] During the operation of the cooling tower 8, the nozzles 22 of the spray section 20 in the water spraying space 51 are opened, while the nozzles 22 of the spray section 20 in the air inducing space 52 are closed. That is, water is sprayed in the water spraying space 51, while no water is sprayed in the air inducing space 52, and hot water is circulated in the heat exchange tubes 121 in the heat exchange module 100 in the air inducing space 52.

[0194] The dry and cold air from the outside is changed into wet and hot air through the water spraying space 51 by contact heat exchange and evaporation heat exchange with the hot water. The dry and cold air from the outside is changed into dry and hot air through the air inducing space 52 by interval heat exchange with the water in the heat exchange tubes 121. The wet and hot air and the dry and hot air both flow upward and mix in the mixing layer 60, thereby playing a role in fog elimination.

[0195]

Heat exchange tube 121’

[0196] Figure 27 shows another structure of heat exchange tube 121', which has a tube body 124'; the outer circumference of the tube body 124' is provided with fins 122' spirally wrapped around the tube body 124'. The fins 122' extend along the length direction of the heat exchange tube 121'. The pitch of the fins 122' is greater than or equal to 4.5 mm, for example, can be 5 mm, 5.5 mm, etc. The helical gap 123' between the helical fins 122' is formed to allow at least part of the water droplets to pass through.

[0197] In some embodiments, the pitch of the above-mentioned fins 122' is greater than or equal to 6 mm, for example, 6 mm, 6.1 mm, 6.2 mm, 6.5 mm, 7 mm, 8 mm, etc.

[0198]

Cooling tower 9

[0199] In some working scenarios, steam needs to be cooled. For example, when the above-mentioned cooling tower structure is still used as a defogging mode, in the water spraying space, the steam in the heat exchange module 100, 200 is condensed into water; but in the air induction space (not water spraying), the steam quickly passes through the corresponding heat exchange module 100, 200 and cannot be condensed into water, which cannot achieve the ideal cooling effect.

[0200] Therefore, in the cooling tower 9 of the present embodiment, the extension direction of the heat exchange module 100, 200 is set so that part of the length of the heat exchange tube 121 is located in the water spraying space and part of the length is located in the air induction space.

[0201] As shown in Figure 28, the cooling tower 9 includes a plurality of partitions 50 arranged longitudinally to divide the inside of the cooling tower 9 into alternating water spraying spaces 51 and air induction spaces 52. The heat exchange layer 37 includes a plurality of heat exchange modules 100 (or heat exchange modules 200, the same below). The heat exchange tube 121 in the heat exchange module 100 passes through the above-mentioned partition 50, so that part of the length is located in the water spraying space 51 and part of the length is located in the air induction space 52.

[0202] Part of the cold air flowing into the inside of the cooling tower 9 from the air inlet 11 enters the water spraying space 51, and exchanges heat with the water sprayed onto the surface of the heat exchange module 100 in the heat exchange layer 7 to form wet hot air. In the above process, the steam in the heat exchange tube 121 is cooled and condensed.

[0203] Part of the cold air flowing into the inside of the cooling tower 9 from the air inlet 11 enters the air induction space 52, and exchanges heat with the steam or hot water in the heat exchange tube 121 in the heat exchange layer 7 to become dry hot air.

[0204] The above wet hot air and dry hot air flow upward to the mixing layer 60 under the traction of the exhaust part 80, mix, form unsaturated hot air, and thus reduce or eliminate the rain mist formed on the upper side of the exhaust port 12.

[0205] It should be noted that in the above embodiment, the extension direction of the heat exchange pipe 121 is preferably perpendicular to the partition plate 50. For example, a mounting hole can be provided on the partition plate 50, and the heat exchange module 100 passes through the mounting hole. Further, the edge of the mounting hole of the partition plate 50 can be embedded between the two adjacent filler pieces 111, so that water in the water spraying space 51 can be prevented from splashing into the air induction space 52.

[0206] In addition, the extension direction of the heat exchange pipe 121 can also be at an angle greater than zero degrees with the partition plate 50.

[0207]

Cooling tower 9'

[0208] In some working scenarios, steam needs to be cooled. For example, when the above-mentioned cooling tower structure is still used as a mist elimination mode, in the water spraying space, the steam in the heat exchange module 100, 200 is condensed into water; but in the air induction space (not water spraying), the steam quickly passes through the heat exchange module 100, 200 and cannot be condensed into water, which cannot achieve the ideal cooling effect.

[0209] Therefore, in the cooling tower 9 of the present embodiment, the extension direction of the heat exchange module 100, 200 is arranged such that part of the length of the heat exchange pipe 121 is located in the water spraying space and part of the length is located in the air induction space.

[0210] As shown in FIG. 28, the cooling tower 9 includes a plurality of partition plates 50 arranged longitudinally to divide the interior of the cooling tower 9 into alternating water spraying spaces 51 and air induction spaces 52. The following takes the heat exchange module 100 as an example for description. The heat exchange layer 37 includes a plurality of heat exchange modules 100. The heat exchange pipe 121 in the heat exchange module 100 passes through the above-mentioned partition plate 50, so that part of the heat exchange pipe 121 is located in the water spraying space 51 and part of the heat exchange pipe 121 is located in the air induction space 52. In addition, in some embodiments, two heat exchange pipes 121 can be connected in series by a pipe, one of which is located in the water spraying space 51 and the other is located in the air induction space 52. In summary, when the steam flows through the heat exchange pipe 121 of the cooling tower, part of the flow path is located in the water spraying space 51 and the other part of the flow path is located in the air induction space 52.

[0211] Part of the cool air flowing into the cooling tower 9 from the air inlet 11 enters the water spraying space 51 and exchanges heat with the water sprayed on the surface of the heat exchange module 100 in the heat exchange layer 7 to form wet hot air. In the above process, the steam in the heat exchange tube 121 is cooled and condensed.

[0212] Part of the cool air flowing into the cooling tower 9 from the air inlet 11 enters the air induction space 52 and exchanges heat with the steam or hot water in the heat exchange tube 121 in the heat exchange layer 7 in a wall type heat exchange to become dry hot air.

[0213] The above wet hot air and dry hot air flow upward into the mixing layer 60 under the traction of the exhaust part 80 and mix to form unsaturated hot air, thereby reducing or eliminating the rain mist formed on the upper side of the air outlet 12.

[0214] It should be noted that in the above embodiment, the extension direction of the heat exchange tube 121 is preferably perpendicular to the partition plate 50, for example, mounting holes can be provided on the partition plate 50, and the heat exchange module 100 passes through the mounting holes. Further, the edges of the mounting holes of the partition plate 50 can be embedded between the two adjacent filler pieces 111, so that the water in the water spraying space 51 can be prevented from splashing into the air induction space 52.

[0215] In addition, the extension direction of the heat exchange tube 121 can also be at an angle greater than zero degrees with the partition plate 50.

[0216]

Cooling system 9000

[0217] FIG. 31 is a schematic diagram of a cooling system formed by the combination of an air cooler and a closed cooling tower.

[0218] In some technical solutions, as shown in FIG. 31, the heat generated by the heat source 800 is absorbed by the circulating medium, the heated circulating medium is sequentially cooled by the air cooler 9200 and the closed cooling tower 9100, and then returns to the heat source 800, thereby forming a cooling system 9000. Among them, the return water pump 47 is used to provide circulating power for the circulating medium, and the constant pressure water supplement unit 48 is used to supplement the lost circulating medium in the circulation.

[0219] The above-mentioned air cooler 9200 can be in parallel connection. The air cooler 9200 uses air to cool the circulating medium, which is mainly suitable for seasons with relatively low air temperature compared to the temperature of the circulating medium, such as winter. The advantage is that air and circulating medium do not come into direct contact, so the circulating medium will not be evaporated. However, the air cooler 9200 also has some problems, for example, when the air temperature is close to the temperature of the circulating medium, the air cooler 9200 loses its cooling effect; for example, impurities in the air can block the fin gap of the sealed finned tube 9210 in the air cooler, thereby reducing the heat dissipation efficiency of the air cooler 9200.

[0220] The closed cooling tower 9100 can also be multiple in parallel. The closed cooling tower 9100 is used to make up for the deficiency of the air cooler 9200, and the closed cooling tower 9100 is sequentially provided from top to bottom with a spraying part 9120 and a heat exchange layer 9130. The heat exchange layer 9130 includes a filler layer 9131 and a light pipe layer 9132. The circulating medium circulates in the light pipe layer 9132.

[0221] In addition, the closed cooling tower 9100 also includes a spraying circulating system 700, which includes a circulating pump 710. The suction port of the circulating pump 710 is connected to the water pool 9400 at the bottom of the closed cooling tower 900 through a pipeline, and the discharge port of the circulating pump 710 is connected to the spraying part 9120 through a pipeline.

[0222] In the closed cooling tower 9100, the water sprayed from the spraying part 9120 is first sprayed onto the filler layer 9131 and exchanges heat with the air flowing from bottom to top, and part of the water is evaporated to absorb the heat in the sprayed water, thereby cooling the circulating water. Then, the circulating water falls and sprays onto the light pipe surface of the light pipe layer 9132, and exchanges heat with the circulating medium in the light pipe, thereby reducing the temperature of the circulating medium. At the same time, the circulating water droplets on the light pipe surface also exchange heat with the air flowing from bottom to top, thereby also playing a role in cooling the circulating medium.

[0223] However, the above system has some problems. First, the combination of the closed cooling tower 9100 and the air cooler 9200 increases the construction cost and the floor area of the equipment, and also increases the number of fans and the corresponding operating energy consumption. Second, when the air temperature is high in summer, the air cooler 9200 loses its heat dissipation capacity and needs to be closed, but the circulating medium still needs to pass through the densely arranged finned tube layer 9210 inside the air cooler 9200 (otherwise, the inside of the densely arranged finned tube layer 9210 will be blocked and corroded by impurities), thus causing unnecessary circulating pressure drop and energy loss. Similarly, when the air cooler 9200 can meet the use requirements, the closed cooling tower 9100 often needs to be closed, but the circulating medium still needs to flow in the light pipe layer 9132 (otherwise, the inside of the light pipe will be blocked and corroded), thus also causing unnecessary circulating pressure drop and energy loss. In addition, the existing cooling system also has the technical problems of low heat dissipation efficiency of the closed cooling tower for the circulating medium and easy blockage of the fin gaps of the densely arranged finned tube layer 9210 of the air cooler 9200.

[0224] Therefore, the present application provides a new design idea for a cooling system by means of the inventive concept of heat exchange pipes with sparse fins, which combines the functions of the closed cooling tower and the air cooler, enhances the heat exchange between them, and reduces the construction cost and the floor area, and reduces the operating energy consumption.

[0225] Figure 32 is a schematic diagram of a cooling system comprising a plurality of cooling towers according to the present application. Figure 33 is a schematic diagram of a closed cooling tower according to the present application.

[0226] As shown in Figures 32 and 33, the cooling tower system 1000 comprises a plurality of cooling towers 1100 connected in parallel, including cooling tower 1100a, cooling tower 1100b, and cooling tower 1100n. The number of cooling towers 1100 required can be matched according to the cooling requirements.

[0227]

Cooling tower 1100

[0228] Specifically, the cooling tower 1100 comprises a working cycle system, in which the cooling medium flows from the heat source 800 to the inlet of the heat exchange module 100 in the heat exchange layer 30 via the main pipe 44, and after flowing through the heat exchange module 100, is collected to the return pipe 46 and flows to the heat source 800 via the return pipe 46 to cool the heat source 800, thus forming a working cycle loop between the cooling tower 1100 and the heat source 800. The cooling medium can be water, coolant, etc.

[0229] The cooling tower 1100 further comprises a spray cycle system 700, which comprises a circulating pump 710, the suction end of which is connected to the water collecting portion 70, and the discharge end of which is connected to the spray portion 20. The circulating pump 710 can draw water from the water collecting portion 70 and supply water to the spray portion 20. The water sprayed by the spray head 22 of the spray portion 20 exchanges heat with the circulating medium in the heat exchange tube 121 and the external air in the heat exchange layer 30.

[0230] In the heat exchange layer 30, on the one hand, the falling water can fall onto the outside of the heat exchange tube 121 in the heat exchange module 100 and exchange heat with the hot water in the heat exchange tube 121. On the other hand, the cold air flowing from bottom to top in the cooling tower 1100 exchanges heat with the circulating medium in the heat exchange tube 121 and the water sprayed by the spray cycle system 700. Water films can be formed on the packing sheet 111 and the fin 122, thereby providing a carrier for the heat exchange between water and air and cooling the circulating medium and the circulating water. Due to the special structure of the heat exchange tube 121 in the present application, the water sprayed will not block the gap 123 between the fins 122, and the water droplets will slide to the lower end of the fin 122 under the guidance of the fin 122 and drop, thus avoiding the reduction of the heat exchange efficiency between the cooling medium on the inside of the heat exchange tube 121 and the cold air on the outside.

[0231] In addition, in operation, the hot water sprayed from the spray portion 20 has a cleaning effect on the heat exchange tube 121, which washes away the willow catkins and dust carried by the external air, thereby avoiding the reduction of the heat exchange efficiency of the heat exchange tube 121.

[0232] By the cooling tower 1100 of the present application, the cooling system 1000 has multiple working modes:

[0233] In winter, when the temperature of the external air decreases, the cooling of the circulating medium can be satisfied by the air cooling alone, and then the spray circulating system 700 in the cooling tower 1100 can be closed, and the exhaust part 80 is opened, the external cold air exchanges heat between the heat exchange layer 30 and the circulating medium in the heat exchange tube 121, and in the case of satisfying the cooling requirement, the fogging can be avoided.

[0234] In summer, the spray circulating system 700 and the exhaust part 80 are opened, and the circulating water and air in the cooling tower 1100 cool the circulating medium in the heat exchange tube 121. At the same time, the surface of the filler sheet 111 and the fin 122 of the heat exchange tube 121 forms a water film, which increases the contact area of the circulating water and air, and cools the circulating water. It should be emphasized that, in the heat exchange module 100, the heat exchange tube 121 passes through the containing cavity 113 formed by the layering of the filler sheet 111, and the heat exchange tube 121 generates a disturbance effect on the air between the filler sheets 111, which prolongs the heat exchange time of the air and the circulating water, and comprehensively, the cooling effect of the circulating water and air on the circulating medium is improved.

[0235] In the intermediate season, the number of the cooling tower 1100 can be adjusted according to the permission, and under the premise of satisfying the cooling requirement of the circulating medium, the comprehensive energy consumption of the cooling system is reduced.

[0236] In addition, in some embodiments, the heat exchange module 200 can also be used in the cooling tower 1100 instead of the heat exchange module 100.

[0237] Furthermore, the cooling tower 1100 of the present application can be composed of the cooling towers 1, 2, 3, 4, 5, 6, 7, 8, 9, 9', and the composition can be parallel or series connection of multiple cooling towers, or partial series connection of cooling towers and partial parallel connection of cooling towers.

[0238] When the cooling system is composed of the cooling towers 2, 3, 7, 8, 9, 9', the cooling system has the function of fog elimination.

[0239] The heat exchange tube, the heat exchange module and the cooling tower of the present application are described in detail with reference to the preferred technical solutions of the present application, however, it should be noted that any modification, modification and change can be made by the person skilled in the art on the basis of the above disclosure without departing from the spirit of the present application. The present application includes the above specific embodiments and any equivalent forms thereof.

Claims

1. A heat exchange tube, characterized in that, a tube body is provided; a fin extending radially outward is arranged on the outer circumference of the tube body, and the fin is arranged in an array or in a spiral along the extension direction of the heat exchange tube; the distance between adjacent fins is greater than or equal to 4.5 mm, and a gap allowing water droplets to pass through is formed between the adjacent fins.

2. The heat exchange tube according to claim 1, characterized in that, the distance between two adjacent fins is greater than or equal to 6 mm.

3. The heat exchange tube according to claim 1, characterized in that, a guide portion is arranged between the root of the fin and the tube body, and the guide portion is formed in an arc shape or a chamfer shape.

4. The heat exchange tube according to claim 3, characterized in that, two guide portions are connected together in the gap between two adjacent fins, and an arc-shaped bottom portion surrounding the tube body is formed at the connection.

5. Heat exchange module, characterized in that including: a filler portion formed by laminating filler sheets, and a through hole is arranged on the filler sheet, and the corresponding through hole is laminated to form a receiving cavity in the filler portion formed by laminating the filler sheets; and a heat exchange tube arranged in the receiving cavity, and the heat exchange tube has a tube body; a fin extending radially outward is arranged on the outer circumference of the tube body, and the fin is arranged in an array or in a spiral along the extension direction of the heat exchange tube; the distance between adjacent fins is greater than or equal to 4.5 mm, and a gap allowing water droplets to pass through is formed between the adjacent fins.

6. The heat exchange module according to claim 5, characterized in that, a guide portion is arranged between the root of the fin and the tube body, and the guide portion is formed in an arc shape or a chamfer shape; two guide portions are connected together in the gap between two adjacent fins, and an arc-shaped bottom portion surrounding the tube body is formed at the connection.

7. The heat exchange module according to claim 5, characterized in that, the heat exchange tube and the receiving cavity are both multiple; the heat exchange tube penetrates through the receiving cavity; one side of the lamination direction of the filler sheet of the filler portion is provided with a first box, and the other side of the lamination direction is provided with a second box; the heat exchange tube has oppositely arranged first and second ends; the first end of the heat exchange tube communicates with the first box, and the second end communicates with the second box.

8. The heat exchange module according to claim 7, characterized in that, a spacer is arranged in the first box, thereby forming a first cavity and a second cavity on both sides of the spacer, and part of the first end of the heat exchange tube communicates with the first cavity, and the rest of the first end of the heat exchange tube communicates with the second cavity.

9. The heat exchange module according to claim 5, characterized in that, the heat exchange tube is bent into a U shape, one of the two branches of the U shape penetrates through one of the receiving cavities, and the other branch of the U shape penetrates through the other receiving cavity.

10. The heat exchange module according to claim 5, characterized in that, the heat exchange tube is bent more than twice and penetrates through at least one receiving cavity.

11. A heat exchange module, characterized by has: The heat exchange tube has a tube body, and a plurality of fins extending radially outward on the outer periphery of the tube body, the fins being arranged along the length direction of the heat exchange tube; a gap allowing water droplets to pass is formed between the adjacent two fins; The first box body is connected with the first end of the heat exchange tube, and the second box body is connected with the second end of the heat exchange tube.

12. The heat exchange module according to claim 11, wherein The first box body is provided with a partition plate, so that a first cavity and a second cavity are formed on both sides of the partition plate, the first ends of part of the heat exchange tubes are communicated with the first cavity, and the first ends of the rest of the heat exchange tubes are communicated with the second cavity.

13. A heat exchange module, comprising: The heat exchange tube has a tube body, and a plurality of fins extending radially outward on the outer periphery of the tube body, the fins being arranged along the length direction of the heat exchange tube; a gap allowing water droplets to pass is formed between the adjacent two fins; The distance between the adjacent two fins is greater than or equal to 4.5 mm; The heat exchange tube is bent into a zigzag shape.

14. A heat exchange module, comprising: The heat exchange tube has a tube body, and a plurality of fins extending radially outward on the outer periphery of the tube body, the fins being arranged along the length direction of the heat exchange tube; a gap allowing water droplets to pass is formed between the adjacent two fins; The box body is provided with a partition plate, so that a first cavity and a second cavity are formed on both sides of the partition plate, the first ends of the heat exchange tubes are communicated with the first cavity; the heat exchange tube has a zigzag shape, so that the second ends of the heat exchange tubes are communicated with the second cavity.

15. Cooling tower, characterized in that comprising: A tower body including an air inlet formed in a lower portion thereof and allowing external air to flow in, and an air outlet formed in an upper portion thereof and capable of discharging air flow; A heat exchange layer including a filler layer and a heat exchange tube layer arranged along the up-down direction; the heat exchange tube layer includes the heat exchange module according to any one of claims 11 to 14; A spraying portion arranged on the upper side of the heat exchange layer, the spraying portion being used for spraying hot water to the heat exchange layer; A water receiving portion located at the bottom of the cooling tower and used for containing water sprayed by the spraying portion; A spraying circulation system having one end connected with the water receiving portion and the other end connected with the spraying portion, and used for conveying water in the water receiving portion to the spraying portion.

16. The cooling tower according to claim 15, wherein A plurality of partitions extending along the stacking direction of the filler sheets are vertically arranged in the region between the spraying portion and the heat exchange layer, so as to form alternating air guiding spaces and water spraying spaces; The heat exchange module is arranged in at least the heat exchange layer corresponding to the air guiding space.

17. A closed cooling tower characterized by comprising: A tower body including an air inlet formed in a lower portion thereof and allowing external air to flow in, and an air outlet formed in an upper portion thereof and capable of discharging air flow; The heat exchange layer comprises a heat exchange module; the heat exchange module has a filler part formed by laminating filler sheets, the filler sheets are provided with through holes, and the corresponding through holes are laminated to form accommodating cavities in the filler part formed by laminating the filler sheets; a heat exchange pipe is arranged in the accommodating cavities, and the heat exchange pipe has a pipe body; the outer periphery of the pipe body is provided with fins extending radially outward, and the fins are arranged in an array along the extension direction of the heat exchange pipe or are arranged in a spiral shape; the distance between adjacent fins is greater than or equal to 4.5 mm, and a gap part allowing water droplets to pass through is formed between the adjacent fins; a spraying part arranged on the upper side of the heat exchange layer, the spraying part being used for spraying hot water to the heat exchange layer; a water receiving part located at the bottom of the cooling tower and used for accommodating water sprayed by the spraying part; a spraying circulating system connected to the water receiving part at one end and connected to the spraying part at the other end, and used for conveying water in the water receiving part to the spraying part.

18. Cooling system, characterized in that The application further provides a closed cooling tower system comprising a plurality of closed cooling towers as described in claim 17, and the plurality of closed cooling towers are connected in parallel. A working circulating system is connected to the heat exchange modules in the closed cooling towers respectively, so that the plurality of closed cooling towers are connected in parallel to form a working circulating loop for cooling a heat source. The application further provides a closed cooling tower comprising a tower body, an air inlet formed in the lower part of the tower body and allowing external air to flow in, and an air outlet formed in the upper part of the tower body and capable of discharging air flow; a heat exchange layer comprising a heat exchange module; the heat exchange module has a filler part formed by laminating filler sheets, the filler sheets are provided with through holes, and the corresponding through holes are laminated to form accommodating cavities in the filler part formed by laminating the filler sheets; a heat exchange pipe is arranged in the accommodating cavities, and the heat exchange pipe has a pipe body; the outer periphery of the pipe body is provided with fins extending radially outward, and the fins are arranged in an array along the extension direction of the heat exchange pipe or are arranged in a spiral shape; the distance between adjacent fins is greater than or equal to 4.5 mm, and a gap part allowing water droplets to pass through is formed between the adjacent fins; and a spraying part arranged on the upper side of the heat exchange layer, the spraying part being used for spraying hot water to the heat exchange layer.

19. Hyperbolic cooling tower, characterized in that The application further provides a closed cooling tower comprising a tower body, an air inlet formed in the lower part of the tower body and allowing external air to flow in, and an air outlet formed in the upper part of the tower body and capable of discharging air flow; a heat exchange layer comprising a heat exchange module; the heat exchange module has a filler part formed by laminating filler sheets, the filler sheets are provided with through holes, and the corresponding through holes are laminated to form accommodating cavities in the filler part formed by laminating the filler sheets; a heat exchange pipe is arranged in the accommodating cavities, and the heat exchange pipe has a pipe body; the outer periphery of the pipe body is provided with fins extending radially outward, and the fins are arranged in an array along the extension direction of the heat exchange pipe or are arranged in a spiral shape; the distance between adjacent fins is greater than or equal to 4.5 mm, and a gap part allowing water droplets to pass through is formed between the adjacent fins; and a spraying part arranged on the upper side of the heat exchange layer, the spraying part being used for spraying hot water to the heat exchange layer. ​ ​ ​ 20. A water saving mist eliminator cooling tower for steam condensation, characterized by, ​ ​ ​ The cooling tower is provided with longitudinal partitions which divide the interior of the cooling tower into a water spraying space and an air induction space. When steam flows in the heat exchange pipes in the cooling tower, a part of the flow path of the steam is located in the water spraying space and another part of the flow path of the steam is located in the air induction space.

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