Spraying system for cooling tower and cooling tower

Abstract

A spraying system for a cooling tower and the cooling tower relate to the technical field of cooling equipment, the spraying system comprises a water supply pipe, a main nozzle and an auxiliary nozzle, the main nozzle and the auxiliary nozzle are respectively communicated with the water supply pipe through pipelines; and the height position of the auxiliary nozzle is higher than that of the main nozzle. According to the utility model, the auxiliary spray head is arranged and is higher than the main spray head, so that when the pressure of the water supply pipeline is increased, the pressure is relieved through the auxiliary spray head, the damage of the packing sheet caused by too high flow speed of water sprayed by the main spray head is avoided, and meanwhile, the heat exchange capacity of the packing layer is also increased by the water sprayed by the auxiliary spray head.

Description

Technical Field

[0001] The utility model relates to the technical field of cooling equipment, in particular to a spray system for a cooling tower and a cooling tower. Background Art

[0002] In the prior art, the bottom layer of the cooling tower is an air intake layer, and a plurality of dampers are arranged around the air intake layer. A packing layer is arranged above the air intake layer. A spraying part is arranged above the packing layer, and the nozzle of the spraying part sprays the hot water to be treated onto the packing layer.

[0003] Under some working conditions, the water supply to the cooling tower experiences pressure fluctuations, causing the flow rate of water sprayed from the nozzles to increase instantly; or some nozzles need to be closed, and the water flow rate of the remaining nozzles in operation increases, causing the packing sheets to be deformed by water impact, affecting the normal operation of the packing layer. Utility Model Content

[0004] The utility model provides a spray system and a cooling tower for the above-mentioned technical problems existing in the prior art, which can prevent the water spraying velocity of the spray head from being too high, thereby playing a role in protecting the packing sheets.

[0005] To achieve the above technical objectives, one aspect of an embodiment of the utility model provides a spray system for a cooling tower, including a water supply pipe, a main nozzle and an auxiliary nozzle, wherein the main nozzle and the auxiliary nozzle are connected to the water supply pipe through pipelines respectively; the height position of the auxiliary nozzle is higher than the height position of the main nozzle.

[0006] Furthermore, there are multiple main nozzles arranged along the water supply pipe, and the height positions of the multiple main nozzles are the same.

[0007] Furthermore, there are multiple auxiliary nozzles arranged along the water supply pipe, and the height positions of the multiple auxiliary nozzles are the same.

[0008] Furthermore, there are multiple water supply pipes, which are arranged horizontally in the cooling tower.

[0009] Another aspect of the embodiment of the utility model provides a cooling tower, comprising a packing layer and a spraying part arranged on the upper side of the packing layer for spraying hot water onto the packing layer, the spraying part comprising a water supply pipe, a main spray head and an auxiliary spray head, the main spray head and the auxiliary spray head are respectively connected to the water supply pipe through pipelines; the height position of the auxiliary spray head is higher than the height position of the main spray head;

[0010] There are multiple main nozzles, which are arranged along the water supply pipe, and the height positions of the multiple main nozzles are the same; there are multiple auxiliary nozzles, which are arranged along the water supply pipe, and the height positions of the multiple auxiliary nozzles are the same; there are multiple water supply pipes, which are arranged in the horizontal direction in the cooling tower.

[0011] Another aspect of the utility model provides a cooling tower, comprising a packing layer and a spraying part provided on the upper side of the packing layer for spraying hot water onto the packing layer;

[0012] A plurality of partitions are substantially vertically arranged in the area between the spraying part and the packing layer; the partitions extend along the front-rear direction of the cooling tower, and the top surfaces of the partitions and the packing layer enclose a plurality of spraying spaces and air entrainment spaces arranged alternately;

[0013] A first spray unit is arranged in the spray space, and a second spray unit is arranged in the air entrainment space;

[0014] The first spray unit includes a first water supply pipe, a first main spray head and an auxiliary spray head. The first water supply pipe extends along the front-rear direction of the cooling tower. The first main spray head and the auxiliary spray head are respectively connected to the first water supply pipe through pipelines. The height position of the auxiliary spray head is higher than the height position of the first main spray head.

[0015] The second spray unit includes a second water supply pipe and a second main nozzle, the second water supply pipe extends along the front-to-back direction of the cooling tower; the second main nozzle is connected to the second water supply pipe through a pipeline, and the second main nozzle is at the same height as the first main nozzle.

[0016] One or more technical solutions provided in the embodiments of the utility model have at least the following technical effects or advantages: the utility model provides an auxiliary nozzle, and the height position of the auxiliary nozzle is higher than the main nozzle. When the pressure of the water supply pipeline increases, the pressure is released through the auxiliary nozzle to avoid damage to the packing sheet caused by excessive flow rate of water sprayed from the main nozzle. At the same time, the water sprayed from the auxiliary nozzle also increases the heat exchange capacity of the packing layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The schematic diagram of the structure of a cooling tower according to an embodiment of the present invention is shown in FIG.

[0018] Figure 2 The figure is a schematic diagram of the structure of a cooling tower according to an embodiment of the present invention, wherein the cooling tower is in winter working state.

[0019] Figure 3 It is a structural diagram of a cooling tower according to the first embodiment of the present utility model.

[0020] Figure 4This is a structural diagram of the first spray unit in the cooling tower of the first embodiment of the utility model.

[0021] Figure 5 It is a schematic diagram of the arrangement of the spray system in the cooling tower of the first embodiment of the utility model.

[0022] Description of Reference Numerals

[0023] 1. First water supply pipe; 2-First main nozzle; 3-Auxiliary nozzle; 4. Second water supply pipe; 5-Second main nozzle;

[0024] 10. Cooling tower; 101. Air intake layer; 102. Air door; 103. Filling layer;

[0025] 104, spraying part; 104a, first spraying unit; 104b-second spraying unit; 105, partition; 105a, spraying space; 105b, air entrainment space;

[0026] 106. Exhaust layer; 107. Fan; 108. Exhaust vent. DETAILED DESCRIPTION

[0027] Other objects and advantages of the present invention will become apparent through explanation of the following preferred embodiments of the present application.

[0028] In order to clearly express the positional relationship, the direction of the cooling tower in this embodiment is defined as follows: Figure 1 As shown, the positive direction of the x-axis is right, and the negative direction of the x-axis is left. The positive direction of the y-axis is up, and the negative direction is down. The inside of the paper is the front (i.e. Figure 5 The positive direction of the z axis), the outer side of the paper is the back (i.e. Figure 5 negative direction of the z-axis).

[0029] Figure 1 A schematic structural diagram of a cooling tower according to an embodiment is shown.

[0030] like Figure 1 As shown, the bottom layer of the cooling tower 10 is an air intake layer 101, and a plurality of dampers 102 are arranged around the air intake layer 101. A packing layer 103 is arranged above the air intake layer 101. A spraying part 104 is arranged above the packing layer 103, and the spraying part 104 sprays the hot water to be treated to the packing layer 103. A plurality of partitions 105 are erected roughly in the area between the spraying part 104 and the packing layer 103. The partitions 105 extend in a direction perpendicular to the paper surface. The partitions 105 and the top surface of the packing layer 103 enclose a plurality of spray spaces 105a and air entrainment spaces 105b arranged alternately.

[0031] Above the spray section 104 is the exhaust layer 106, and above the exhaust layer 106 is an exhaust port 108 provided with a fan 107. The fan 107 draws air upward, so that cold air enters the air intake layer 101 from the damper 102 in the lower layer of the cooling tower 10, passes upward through the packing layer 103 through the spray space 105a and the air intake space 105b, is further mixed in the exhaust layer 106, and is discharged upward through the exhaust port 108.

[0032] On the other hand, the hot water to be treated sprayed from the spraying part 104 to the packing layer 103 is cooled by the packing layer 103 and falls to the bottom of the air inlet layer 101. The cooled water is recovered through the collecting equipment for recycling in the factory.

[0033] According to different ambient temperatures, the cooling tower of this embodiment has a summer working state and a winter working state.

[0034] In summer working conditions, such as Figure 1 As shown, the spraying space 105a and the bleed air space 105b are sprayed with hot water in the same manner through the spraying part 104. This ensures that the cooling tower 10 can improve the heat exchange efficiency as much as possible without the problem of fogging in summer.

[0035] In winter working state, such as Figure 2 As shown, by opening the nozzle in the spraying part 104 corresponding to the spraying space 105a and closing the nozzle in the spraying part 104 corresponding to the air entraining space 105b, the hot water to be treated sprayed by the spraying part 104 is confined in the spraying space 105a and enters the packing layer 103, and flows along the spraying space 105a. Figure 2 The water flow path indicated by the solid arrow flows through the packing layer 103 .

[0036] Since there is no water sprayed in the air intake space 105b, the dry cold air entering the cooling tower 10 from the damper 102 passes through the Figure 2 The air flow path indicated by the dashed arrow flows through the packing layer 103, and the dry cold air exchanges heat with the hot water under spraying through the walls between the packing sheets, thereby cooling the hot water and forming dry hot air.

[0037] The dry cold air passing through the packing layer 103 from bottom to top along the water flow path contacts with the hot water for heat exchange, and forms hot saturated air, i.e., moist hot air, after passing through the packing layer 103. In addition, because there is hot water sprayed from the upper spraying part 104 in the water flow path, the air sucked by the fan 107 in the water flow path is subject to greater resistance, and is very small relative to the flow rate flowing through the air flow path, usually only a fraction.

[0038] The dry hot air flowing through the air flow path and the humid hot air flowing through the water flow path are mixed in the exhaust layer 106. Since there is less humid hot air, unsaturated hot air is formed after mixing with the dry hot air. After being discharged into the atmosphere through the well blower 107 and the exhaust port 108, the unsaturated hot air is gradually cooled and less water is precipitated, thereby greatly reducing the amount of fog formed.

[0039] However, when switching from summer to winter operation, the packing sheet may be damaged. The reason is that since half of the valves are closed, the total amount of water that needs to be handled by the cooling tower remains unchanged, the water flow through a single valve increases, and the water flow rate of the nozzle increases significantly. The thickness of the packing sheet is very thin (0.3-0.4mm), and it is easy to be damaged by the impact of high-speed water flow.

[0040] To solve the above technical problems, an embodiment of the present invention provides a spray system. Specifically, a first spray unit 104a is arranged in the spray space 105a, and a second spray unit 104b is arranged in the air entrainment space 105b.

[0041] The first spray unit 104a includes a first water supply pipe 1, which extends in the horizontal direction. The first spray unit 104a also includes a first main spray head 2 and an auxiliary spray head 3. The first main spray head 2 and the auxiliary spray head 3 are respectively connected to the first water supply pipe 1 through pipelines, and the height position of the auxiliary spray head 3 is higher than the height position of the first main spray head 2.

[0042] The second spray unit 104b includes a second water supply pipe 4 extending in the horizontal direction. The second spray unit 104b also includes a second main spray head 5, and the second main spray head 5 and the first main spray head 2 are at the same height.

[0043] In the summer working state, the spraying part 104 sprays hot water to the spraying space 105a and the air entraining space 105b in the same manner. In the first spraying unit 104a, since the height position of the first main nozzle 2 is lower than the height position of the auxiliary nozzle 3, there is a water pressure difference between the first main nozzle 2 and the auxiliary nozzle 3. The water flowing from the first water supply pipe 1 is preferentially sprayed from the first main nozzle 2. At the same time, in the second spraying unit 104b, since the second main nozzle 5 is at the same height position as the first main nozzle 2, the second main nozzle 5 also sprays water. When the water supply flow rate is within the normal range, the auxiliary nozzle 3 does not spray water; if the water supply flow is too much, the auxiliary nozzle 3 sprays water to assist in discharging the excess water supply, thereby reducing the water spraying speed of the first main nozzle 2 and the second main nozzle 5, and avoiding the first main nozzle 2 and the second main nozzle 5 from spraying too fast to damage the packing sheet.

[0044] In winter working state, such as Figure 2As shown, water is supplied to the first water supply pipe 1 in the spray space 105a, and water supply to the second water supply pipe 4 in the air ducting space 105b is stopped. At this time, only the first spray unit 104a in the spray space 105a sprays water. If the water supply is too much, the water pressure in the first water supply pipe 1 increases, and the auxiliary nozzle 3 sprays water to avoid the first main nozzle 2 spraying water too fast and causing damage to the packing sheet.

[0045] Based on the above principle, by adjusting the height difference between the auxiliary nozzle 3 and the first main nozzle 2 , the water pressure at the inflow end of the first main nozzle 2 , that is, the flow rate of the water sprayed by the first main nozzle 2 , can be controlled.

[0046] Figure 4 FIG. 1 shows a schematic diagram of the structure of the first spray unit 104a according to an embodiment. Figure 4 As shown, the first main nozzle 2 is located at the lower side of the first water supply pipe 1, and the first main nozzle 2 is connected to the first water supply pipe 1 through a pipeline. There are two auxiliary nozzles 3, which are respectively located on the left and right sides of the first main nozzle 2. Through the above arrangement, when the auxiliary nozzle 3 sprays water, the water can be evenly distributed. Furthermore, the two auxiliary nozzles 3 are symmetrically arranged on the left and right sides of the first main nozzle 2.

[0047] The height positions of the two auxiliary nozzles 3 are higher than the height position of the first main nozzle 2 , and the two auxiliary nozzles 3 are at the same height position.

[0048] The device of the present application is described in detail with reference to the preferred technical solution of the present application. However, it should be noted that, without departing from the spirit of the present application, those skilled in the art may make any transformation, modification and change based on the above disclosure. The present application includes the above specific embodiments and any equivalent forms thereof.

Claims

1. A spray system for a cooling tower, characterized in that: It comprises a water supply pipe, a main nozzle and an auxiliary nozzle. The main nozzle and the auxiliary nozzle are respectively connected with the water supply pipe through pipelines. The height position of the auxiliary nozzle is higher than the height position of the main nozzle.

2. The cooling tower spray system according to claim 1, characterized in that: There are multiple main nozzles, which are arranged along the water supply pipe, and the height positions of the multiple main nozzles are the same.

3. The cooling tower spray system according to claim 1, characterized in that: There are multiple auxiliary nozzles, which are arranged along the water supply pipe, and the height positions of the multiple auxiliary nozzles are the same.

4. The cooling tower spray system according to claim 1, characterized in that: There are multiple water supply pipes, which are arranged horizontally in the cooling tower.

5. A cooling tower, characterized in that: It comprises a packing layer and a spraying part arranged on the upper side of the packing layer for spraying hot water onto the packing layer, the spraying part comprises a water supply pipe, a main spray head and an auxiliary spray head, the main spray head and the auxiliary spray head are respectively connected to the water supply pipe through pipelines; the height position of the auxiliary spray head is higher than the height position of the main spray head; There are multiple main nozzles, which are arranged along the water supply pipe, and the height positions of the multiple main nozzles are the same; there are multiple auxiliary nozzles, which are arranged along the water supply pipe, and the height positions of the multiple auxiliary nozzles are the same; there are multiple water supply pipes, which are arranged in the horizontal direction in the cooling tower.

6. A cooling tower, characterized in that: It comprises a packing layer and a spraying part arranged on the upper side of the packing layer and used for spraying hot water onto the packing layer; A plurality of partitions are substantially vertically arranged in the area between the spraying part and the packing layer; the partitions extend along the front-rear direction of the cooling tower, and the top surfaces of the partitions and the packing layer enclose a plurality of spraying spaces and air entrainment spaces arranged alternately; A first spray unit is arranged in the spray space, and a second spray unit is arranged in the air entrainment space; The first spray unit includes a first water supply pipe, a first main spray head and an auxiliary spray head. The first water supply pipe extends along the front-rear direction of the cooling tower. The first main spray head and the auxiliary spray head are respectively connected to the first water supply pipe through pipelines. The height position of the auxiliary spray head is higher than the height position of the first main spray head. The second spray unit includes a second water supply pipe and a second main nozzle, the second water supply pipe extends along the front-to-back direction of the cooling tower; the second main nozzle is connected to the second water supply pipe through a pipeline, and the second main nozzle is at the same height as the first main nozzle.

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